CN117989094A - Gear-driven four-phase reciprocating pump - Google Patents

Abstract

The invention discloses a gear-driven four-phase reciprocating pump, which is mainly provided with a liquid storage cavity, a working cavity, an eccentric gear transmission mechanism, a chain transmission mechanism, a liquid storage cavity inlet and outlet one-way valve and a working cavity inlet and outlet one-way valve. The filter gasket at the side of the check valve of the working cavity ensures that the working environment in the working cavity is pure, and because the eccentric gear structure can realize larger stroke in smaller space, the pump can obtain larger working space in smaller volume, and meanwhile, the four-phase gear transmission balances radial force, so that the working efficiency, stability and safety are remarkably improved compared with the traditional reciprocating pump.

Description

Gear-driven four-phase reciprocating pump

Technical Field

The invention belongs to the field of reciprocating pumps, and particularly relates to a four-phase reciprocating pump driven by gears.

Background

The reciprocating pump has the characteristics of high working pressure, good suction performance, higher efficiency and the like, can convey any medium in principle, is hardly influenced by physical properties and chemical properties of the medium, and can ensure stable pressure because the performance of the reciprocating pump cannot change along with the annual change of the pressure and the conveyed medium, so that the reciprocating pump is widely applied to sewage and wastewater discharge systems, exploration and mining water treatment devices, water supply devices of water works and the like. However, the traditional reciprocating pump has complex structure, unstable flow and difficult maintenance.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the four-phase reciprocating pump driven by gears, which has larger stroke in a smaller space than the traditional connecting rod driving reciprocating structure through the reciprocating gear driving structure, has larger working space under the same volume, remarkably improves the working efficiency and saves the space compared with the traditional reciprocating pump, and meanwhile, because the four-phase gear drives balance radial force, the safety and the stability of the pump are remarkably improved.

In order to achieve the above purpose, the invention adopts the following technical scheme: a gear-driven four-phase reciprocating pump comprises a shell; the inner cavity of the shell is divided into a working cavity and a working cavity inner wall of a liquid storage cavity, and the shell is provided with a liquid storage cavity outlet pipeline and a liquid storage cavity inlet pipeline which are communicated with the liquid storage cavity; an outlet pipeline and a working cavity inlet pipeline which are used for communicating the working cavity with the outside, wherein the outlet pipeline and the working cavity inlet pipeline penetrate through the shell and the inner wall of the working cavity, at least four communication holes are formed in the inner wall of the working cavity, and the working cavity and the liquid storage cavity are communicated by the communication holes; the piston is arranged in the communication hole and separates the working cavity from the liquid storage cavity; an eccentric gear transmission mechanism connected to the piston; the chain transmission mechanism is arranged in the working cavity and is connected with the eccentric gear transmission mechanism; check valves are arranged in the liquid storage cavity outlet pipeline, the liquid storage cavity inlet pipeline, the outlet pipeline and the working cavity inlet pipeline;

The eccentric gear transmission mechanism comprises a driving gear, a driven gear shaft, a fixed rod, a transmission rod, end plates, fixed nails, pulleys and a driving gear shaft, wherein the driving gear shaft rotates clockwise under the action of a transmission chain and drives the driving gear to rotate clockwise, the driven gear rotates anticlockwise around the driven gear shaft under the drive of the driving gear, the driven gear and the driving gear are both eccentric gears, the driving gear shaft penetrates through the fixed rods on two side end plates and two sides, the contact surface between the driving gear shaft and the two side end plates is cylindrical, the contact surface between the driving gear shaft and the two side end plates is identical with the contact surface of the fixed rods on two sides, the rotation of the two structures is not caused, the driven gear shaft is restrained by the two end plates and the pulleys on two sides, the pulleys are connected with the transmission rod, and the transmission rod penetrates through the fixed rods to connect pistons;

the eccentric gear transmission mechanism is driven by the chain transmission mechanism to reciprocate, the piston is driven by the eccentric gear transmission mechanism to reciprocate, and the reciprocating motion of the piston drives the volume change of the liquid storage cavity to finish the working process.

Further, the chain transmission mechanism is composed of a motor shaft of a driving chain, a driving chain and four transmission shafts driven by the driving chain, the transmission shafts are regularly distributed in the upper, lower, left and right directions, the transmission shafts are cylindrical, and a part of circular arcs are cut off along the high direction of the contact surface of the transmission shafts with a gear driven by the driving chain and the contact surface of the transmission shaft driving gear transmission mechanism to form a plane for bearing circumferential moment so as to fix the gear. The transmission chain rotates clockwise to drive the transmission shaft to rotate.

Furthermore, the transmission rod is driven by the eccentric gear to reciprocate, and is constrained by the fixed rod to reciprocate only in the horizontal or vertical direction, and the four driving gears are connected with four driving gear shafts uniformly distributed along the four directions of up, down, left and right, and are uniformly distributed in the working cavity and used for balancing the inertia force generated in the gear movement process. The end plates are connected through fixing nails, and the end plates are distributed on the front side and the rear side of the driving gear and the driven gear and used for restraining the driving gear and the driven gear, and the driving gear and the driven gear rotate in a specified range.

Further, the radius ratio of the driving gear to the driven gear is 1:1, the gear ratio is 1:1, the distance from the eccentric gear shaft of the driving gear to the center of the driven gear to the center of the gear is 3/4 of the radius of the gear, and the open area of the fixed rod is the same as the sectional area of the transmission rod.

Further, the piston is connected with a transmission rod in the eccentric gear transmission mechanism, the eccentric gear transmission mechanism drives the piston to reciprocate to cause the internal volume of the liquid storage cavity to change so as to generate pressure change to finish the working process, and the diameter ratio of the piston to the working cavity is 6:1.

Further, the liquid storage cavity inlet pipeline is arranged at the bottom of the shell, the one-way valve comprises a liquid storage cavity inlet one-way valve arranged in the liquid storage cavity inlet pipeline, a liquid storage cavity outlet one-way valve arranged in the liquid storage cavity outlet pipeline, a working cavity outlet one-way valve arranged in the working cavity outlet pipeline and a working cavity inlet one-way valve arranged in the working cavity inlet pipeline.

Further, be equipped with the working chamber import before the inlet channel check valve and filter the gasket, the working chamber import filters the gasket and is used for filtering the impurity that contains in the air in the process of admitting air, the working chamber export check valve inboard is equipped with the working chamber export and filters the gasket, the working chamber export filters the gasket and can filter the lubricating oil in the exhaust working chamber gas, the working chamber import filters the gasket and the working chamber export filters the thickness ratio of gasket to be 1:1, the face of cylinder of working chamber import filters gasket and working chamber export filters the gasket closely laminates the working chamber import pipeline with the inner wall of working chamber export pipeline, the working chamber import filters the outside of gasket with the working chamber export filters the inboard of gasket and is equipped with the fastening ring, the fastening ring can be fixed the working chamber import filters the gasket with the working chamber export filters the gasket when guaranteeing that the import and export resistance is little.

Further, the included angle between the working cavity inlet pipeline and the working cavity outlet pipeline is 90 degrees, the included angles between the working cavity inlet pipeline, the working cavity outlet pipeline and the vertical direction are all 45 degrees, the direction is obliquely upward, the working cavity inlet pipeline and the working cavity outlet pipeline are distributed on two sides of the liquid storage cavity outlet pipeline, and the ratio of the thickness of the working cavity inlet pipeline to the thickness of the shell is 1:2.

Further, the check valve comprises check valve fixer, spring, valve body, base and through-hole, the check valve fixer both ends are equipped with the through-hole, the upper end of spring is fixed in the central point of check valve fixer put, and the lower extreme is fixed in the upper end of valve body, the valve body lower extreme closely laminates with the base upper end, the fixed position of check valve is the central point department of spring, the liquid storage chamber export check valve with the structure of liquid storage chamber import check valve is the same.

By the technical scheme, the invention has the following beneficial effects:

1. According to the application, the chain transmission mechanism is arranged in the working cavity and symmetrically distributed, so that stable transmission of power to the eccentric gear transmission mechanism is realized, the chain transmission mechanism is driven by one motor in the operation process of the pump, the efficiency of the pump is greatly improved, meanwhile, forces in all directions are symmetrically distributed and balanced, the stability of the pump in the operation process is ensured, the large gear drives the chain and the chain to drive the pinion, larger moment can be born, the efficiency is ensured, the safety is improved, and the service life is prolonged;

2. According to the application, through installing the eccentric gear transmission mechanism in the working cavity, the piston is driven by two equal-sized eccentric gears to do reciprocating motion, compared with the traditional connecting rod mechanism, the eccentric gear transmission mechanism is more stable in transmission, smaller in abrasion and longer in service life, double strokes of the common connecting rod mechanism can be obtained through transmission of the two eccentric gears in the same space, larger pressure can be generated by the eccentric gear mechanism in the same space, the efficiency of the pump is greatly improved, and four uniformly distributed eccentric gear transmission mechanisms are arranged in the working cavity, so that inertia force generated in the working process of the gears can be balanced, and the stability and the service life of the gears are improved;

3. The application realizes the pressure change caused by the change of the internal volume of the working cavity in the working process by arranging the one-way valve of the working cavity inlet and outlet device, the pressure change of the working cavity can cause unstable structure, the pressure change of the working cavity in the working process can be weakened by arranging the two one-way valves, the working stability of the working cavity is ensured, meanwhile, the outside of the inlet one-way valve is provided with the filter gasket, dust and impurities in the outside air can be effectively filtered, the purity of the internal environment of the working cavity is ensured, the inside of the outlet one-way valve is also provided with the filter gasket, the lubricating oil in the working cavity gas can be filtered and discharged by the filter gasket, the loss of the lubricating oil is reduced, the filter gasket of the outlet one-way valve is fixed by the fixed ring and the base, the filter gasket of the inlet one-way valve is fixed by the fixed ring and the one-way valve fixer, and the performance of the filter gasket and the balance of the force from the one-way valve can be better ensured;

4. According to the application, the liquid storage cavity inlet one-way valve and the liquid storage cavity outlet one-way valve are arranged on the inlet and outlet pipelines, so that the one-way flow of liquid is realized, the operation of the pump is smooth and efficient, the sealing performance of the pump is ensured, the liquid backflow is effectively limited, the damage to the pump caused by a water hammer formed by the liquid backflow is prevented, the service life of the pump is effectively prolonged, the pump can be filled with liquid after being used, the pump can be directly operated after being started next time, and the working efficiency is improved;

5. The application realizes the uniform distribution of the flow in the pump through the structural design in the pump, conforms to the flow direction of the fluid in the annular liquid storage cavity structure, reduces the erosion phenomenon of the fluid to the internal structure of the pump, ensures the stability and also improves the working efficiency of the pump.

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments, as illustrated in the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Figure 1 is a vertical cross-section of a gear driven four-phase reciprocating pump of the present invention,

Figure 2 is an enlarged view of the structure of the working chamber outlet check valve,

Figure 3 is an enlarged view of the eccentric gear transmission and a process diagram of operation,

Figure 4 is an enlarged view of the chain drive mechanism,

Figure 5 is an enlarged view of the structure of the one-way valve at the inlet of the liquid storage cavity,

Fig. 6 is an enlarged view of the working chamber inlet check valve.

Reference numerals of the above drawings: 1. a housing; 2. an outlet pipeline of the liquid storage cavity; 3.a one-way valve at the outlet of the liquid storage cavity;

4. A working chamber outlet check valve; 41. a working chamber outlet one-way valve holder; 42. a spring; 43. a valve body; 44. a working chamber outlet filter gasket; 45. fastening a circular ring; 46. a base;

5. An outlet pipeline of the working cavity;

7. An eccentric gear transmission mechanism; 71. a fixed rod; 72. a driven gear shaft; 73. a driven gear; 74. a drive gear; 75. an end plate; 76. a drive gear shaft; 77. fixing nails; 78. a pulley; 78. a transmission rod;

8. A chain transmission mechanism; 81. A gear drive shaft; 82. A drive chain;

9. A piston; 10. The inner wall of the working cavity; 11. An inlet pipeline of the liquid storage cavity;

12. A liquid storage cavity inlet one-way valve; 121. a check valve holder; 122. a spring; 123. a valve body; 124. a through hole; 125. a base;

13. A working chamber inlet check valve; 131. a working chamber inlet filter gasket; 132. a spring; 133. a through hole; 134. working chamber inlet check valve fixer; 135. a base; 136. fixing the circular ring;

14. An inlet pipeline of the working cavity; 15. a working chamber; 16. a liquid storage cavity.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

Examples: referring to fig. 1-6, a gear-driven four-phase reciprocating pump is disclosed in this embodiment, comprising a housing 1; a working cavity inner wall 10 dividing the inner cavity of the shell 1 into a working cavity 15 and a liquid storage cavity 16, wherein the shell 1 is provided with a liquid storage cavity outlet pipeline 2 and a liquid storage cavity inlet pipeline 11 which are communicated with the liquid storage cavity 16; an outlet pipe 5 and a working chamber inlet pipe 14 for communicating the working chamber 15 with the outside, wherein the outlet pipe 5 and the working chamber inlet pipe 14 pass through the housing 1 and the working chamber inner wall 10, and the working chamber inner wall 10 is provided with at least four communication holes for communicating the working chamber 15 with the liquid storage chamber 16; a piston 9 provided in the communication hole to separate the working chamber 15 from the reservoir chamber 16; an eccentric gear transmission 7 connected to the piston 9; the chain transmission mechanism 8 is arranged in the working cavity 15, and the chain transmission mechanism 8 is connected with the eccentric gear transmission mechanism 7; check valves are arranged in the liquid storage cavity outlet pipeline 2, the liquid storage cavity inlet pipeline 11, the outlet pipeline 5 and the working cavity inlet pipeline 14;

The eccentric gear transmission mechanism 7 reciprocates under the drive of the chain transmission mechanism 8, the piston 9 reciprocates under the drive of the eccentric gear transmission mechanism 7, and the reciprocating motion of the piston 9 drives the volume change of the liquid storage cavity 16 to finish the working process.

The pump is of a symmetrical structure, and a liquid storage cavity inlet pipeline 11 is arranged at the bottom of the shell 1 and is a channel for external liquid to enter the pump. The inlet of the liquid storage cavity inlet pipeline 11 is in liquid communication with the outside, and the outlet is in communication with the liquid storage cavity 16.

The liquid storage cavity inlet pipeline 11 is internally provided with a liquid storage cavity inlet one-way valve 12. The liquid storage cavity outlet check valve 3 is arranged in the liquid storage cavity outlet pipeline 2, the installation direction of the liquid storage cavity outlet check valve 3 is the same as that of the liquid storage cavity inlet check valve 12, and the liquid storage cavity outlet check valve 3 and the liquid storage cavity inlet check valve 12 are in central symmetry and have the same structure by using a transmission shaft of a pump.

The working chamber 15 contains an eccentric gear drive 7 and a chain drive 8. The working chamber outlet pipe 5 is connected to a portion of the inner wall 10 of the working chamber, and a welding or casting process is used to ensure air tightness, so as to avoid communication between the working chamber 15 and the liquid storage chamber 16, and to directly contact with high-speed fluid.

The working chamber outlet pipeline 5 and the working chamber inlet pipeline 14 are respectively provided with a working chamber outlet one-way valve 4 and a working chamber inlet one-way valve 13, one sides of the working chamber outlet one-way valve 4 and the working chamber inlet one-way valve 13 are respectively provided with a filter gasket, in the working process, the reciprocating motion of the piston 9 enables the volume and the pressure of the liquid storage chamber 16 to change, meanwhile, the volume and the pressure inside the working chamber 15 change, the changing directions are opposite, the working chamber outlet pipeline 5 and the working chamber inlet pipeline 14 can balance the pressure inside the working chamber 15, wherein the working chamber inlet filter gasket 131 is arranged in front of the inlet pipeline one-way valve 13 and is used for filtering impurities contained in air in the air inlet process, dust impurities are prevented from entering the working chamber to be accumulated, transmission among gears and between chains is influenced, and the environment inside the working chamber is kept pure and stable in working.

The working chamber outlet filter gasket 44 is arranged on the inner side of the working chamber outlet check valve 5, and can filter out lubricating oil in the discharged working chamber gas, so that the loss of the lubricating oil in the working chamber is reduced, and the stability of the working chamber 15 is maintained. And a fastening ring 136 is arranged on the outer side of the working chamber inlet filter gasket 131 of the working chamber inlet check valve 13 and the inner side of the working chamber outlet filter gasket 44 of the working chamber outlet check valve 4, so that the gasket is fixed while the inlet and outlet resistance is ensured to be small.

The included angle between the inlet pipeline 14 of the working cavity and the outlet pipeline of the working cavity 15 is 90 degrees, the included angle between the inlet pipeline 14 of the working cavity and the outlet pipeline of the working cavity is 45 degrees, the direction is obliquely upwards, the inlet pipeline and the outlet pipeline are arranged on two sides of the outlet pipeline of the liquid storage cavity 16, the diameter ratio of the inlet pipeline to the outlet pipeline is 1:1, the lengths of the inlet pipeline and the outlet pipeline are the same, the length of the part extending out of the shell 1 occupies 1/4 of the total length of the pipeline, and the ratio of the thickness of the inlet pipeline 14 of the working cavity to the thickness of the shell 1 is 1:2. The thickness ratio of the working chamber inlet filter gasket 131 to the working chamber outlet filter gasket 44 is 1:1, and the gasket has certain elasticity, and the cylindrical surface of the gasket is tightly attached to the inner wall of the pipeline.

The chain transmission mechanism 8 is composed of a motor shaft of a driving chain, a transmission chain 82 and four transmission shafts 81 driven by the transmission chain 8, the transmission shafts 81 driven by the transmission chain 82 are regularly distributed in four directions, namely, the transmission shafts 81 are cylindrical, and a part of circular arcs are cut off to form planes along the high direction of the contact surfaces of the transmission shafts 81 with gears driven by the transmission chain 82 and the contact surfaces of the transmission shaft driving gear transmission mechanism to bear circumferential moment so as to fix the gears. The transmission chain 82 rotates clockwise to drive the transmission shaft 81 to rotate.

The eccentric gear transmission mechanism 7 includes a driving gear 74, a driven gear 73, a driven gear shaft 72, a fixing rod 71, a transmission rod 79, an end plate 75, a fixing nail 77, a pulley 78, and a driving gear shaft 76. The driving gear shaft 76 rotates clockwise under the action of the transmission chain 82, meanwhile, the driving gear 74 is driven to rotate clockwise, the driven gear 73 rotates anticlockwise around the driven gear shaft 72 under the drive of the driving gear 74, the driving gear shaft 76 passes through the two side end plates 75 and the two side fixing rods 71, the contact surface between the driving gear shaft 76 and the two side end plates 75 is cylindrical, the contact surface between the driving gear shaft 76 and the two side end plates 75 and the two side fixing rods is the same, the rotation of the two structures cannot be caused, the driven gear shaft 72 is driven to restrict the movement of the two mechanisms through the two side end plates 75 and the pulley 78, the pulley 78 is connected with the transmission rod 79, and the transmission rod 79 passes through the fixing rods 71 to connect pistons.

The transmission rod 79 reciprocates under the drive of the eccentric gear while being constrained by the fixing rod 71 to reciprocate only in the horizontal or vertical direction. The eccentric gears are connected with four driving gear shafts 76 which are uniformly distributed along the four directions of up, down, left and right, and the four driving gear shafts 76 are uniformly distributed in the working cavity 15 and are used for balancing the inertia force generated in the gear movement process. The end plates 75 are connected by fixing nails 77, are distributed on the front and rear sides of the two eccentric gears, and are used for restraining the two eccentric gears, and the driving gear 74 and the driven gear 73 rotate within a prescribed range.

The radius ratio of the driving gear 74 to the driven gear 73 is 1:1, the gear ratio is 1:1, the distance from the eccentric gear shaft of the two gears to the center of the gears is 3/4 of the radius of the gears, and the open area of the fixed rod 71 is the same as the sectional area of the transmission rod 79.

The piston 9 is connected with a transmission rod 79 in the eccentric gear transmission mechanism 7, the piston 9 reciprocates under the drive of the eccentric gear transmission mechanism 7 to cause the internal volume of the liquid storage cavity 16 to change so as to generate pressure change to finish the working process, and the diameter ratio of the piston to the diameter of the working cavity is 6:1.

The liquid storage cavity inlet check valve 12 is composed of a check valve fixer 121, a spring 122, a valve body 123, a base 125 and a through hole 124. Through holes 124 are formed in two ends of the check valve fixer 121, the upper end of the spring 122 is fixed to the center of the check valve fixer 121, the lower end of the spring 122 is fixed to the upper end of the valve body 123, the lower end of the valve body 123 is tightly attached to the upper end of the base 125, the fixed position of the liquid storage cavity inlet check valve 12 is the center of the spring 122, and the liquid storage cavity outlet check valve 3 and the liquid storage cavity inlet check valve 12 have the same structure.

The working process of the invention is as follows:

In the initial state of the pump not running, the motor is started, the motor shaft drives the transmission chain 82 to do clockwise uniform motion, the transmission chain 82 drives the gear transmission shaft 81 meshed with the transmission chain to do clockwise uniform motion, meanwhile, the gear transmission shaft 81 is connected with the driving gear shaft 76 to drive the same motion, the driving gear shaft 76 drives the driving gear shaft 74 to do clockwise motion, the driven gear 73 is meshed with the driving gear shaft 74, the driven gear shaft 73 is driven by the driving gear shaft 74 to do anticlockwise motion, the driving gear shaft 74 and the driven gear 73 are eccentric gears, the position of the driving gear shaft 76 is kept unchanged during rotation, the relative positions of the driven gear 73 and the driving gear 74 are kept unchanged under the fixation of the end plates 75 at the two ends, but the driven gear shaft 72 is in circular motion relative to the driven gear shaft 73, however, because the end plates 75 and the fixed nails 77 are limited to do only rotate within a specified range, the driven gear shaft 72 is in up-down reciprocating motion relative to the fixed rod 71, the end plates 75 are in circular motion relative to the fixed rod 71, the driven gear shaft 72 is connected with the pulley 78, the driven pulley 78 is driven by the pulley 78 to do left-right reciprocating motion relative to the fixed rod 71, the left-right reciprocating motion relative to the fixed rod 71 is the left reciprocating motion, the left reciprocating motion of the driven pulley 78 is the reciprocating motion relative to the fixed rod 79 is in the right reciprocating motion relative to the right reciprocating motion to the fixed rod, and the reciprocating rod 79 is driven to the reciprocating rod in the reciprocating direction to the reciprocating direction, and the reciprocating rod is 9.

As shown in the process analysis of fig. 3, the driving gear 74 rotates by 90 ° clockwise from the first drawing state to the second drawing state, and at this time, the volume of the working chamber 15 is continuously reduced, and the pressure is continuously increased; the volume of the liquid storage chamber 16 is continuously increased, the pressure is continuously reduced, the same change occurs in the state that the driving gear 74 continues to rotate 90 degrees for reaching the third drawing, the pressure in the liquid storage chamber 16 is continuously reduced in the process, at the moment, the pressure in the liquid storage chamber 16 is smaller than the pressure in the inlet pipeline 11, the spring 122 of the liquid storage chamber inlet one-way valve 12 contracts under the action of the pressure difference between the inlet pipeline 11 and the inside of the liquid storage chamber 16, the liquid storage chamber inlet one-way valve 12 is opened, and liquid in the inlet pipeline 11 enters the liquid storage chamber through the hole of the base 125 and the through hole 124 on the one-way valve fixer 121, so that the pressure in the liquid storage chamber 16 is balanced. In this process, the pressure inside the working chamber 15 is continuously increased, and at this time, the pressure inside the working chamber 16 is greater than the pressure of the outside atmosphere, the spring 42 of the working chamber outlet check valve 4 is compressed by the pressure difference between the outside air and the inside of the working chamber 15, and the air inside the working chamber 15 is discharged to the outside through the through holes of the filter gasket 44, the base 46 and the check valve holder 41, so that the pressure inside the working chamber 15 is balanced.

As shown in fig. 3, the driving gear 74 continues to rotate 90 ° in a clockwise motion, from the state of the third drawing to the state of the fourth drawing, at which time the volume of the working chamber 15 is continuously increased and the pressure is continuously reduced; the volume of the liquid storage cavity 16 is continuously reduced, the pressure is continuously reduced, the same change occurs in the state that the driving gear 74 continuously rotates 90 degrees to the first drawing, the pressure in the liquid storage cavity 16 is larger than the pressure in the outlet pipeline 11 in the process, the spring of the liquid storage cavity outlet one-way valve 3 contracts under the action of the pressure difference between the outlet pipeline and the inside of the liquid storage cavity 16, the fluid in the liquid storage cavity 16 is continuously discharged into the outlet pipeline 2 through the liquid storage cavity outlet one-way valve 3, the pressure in the liquid storage cavity is balanced, meanwhile, the pressure in the working cavity 15 is continuously reduced in the process, the pressure in the working cavity is smaller than the external atmospheric pressure at the moment, the spring 132 of the working cavity inlet one-way valve 13 is compressed under the pressure difference between the external air and the working cavity, the external air is filtered by the filtering gasket 131, and the impurities in the air enter the working cavity inlet pipeline 14 through the working cavity inlet one-way valve 13 and further enter the working cavity 15 to balance the pressure.

When the pump is operated for the first time, the eccentric gear in the working cavity continuously performs circular motion to repeat the process in fig. 3, liquid continuously enters the liquid storage cavity 16, gas continuously exits the liquid storage cavity 16, the complete liquid suction and discharge process is completed once in one circle of operation in the process in fig. 3, compared with the traditional reciprocating pump, the gear transmission is more stable, and a larger stroke can be obtained in the same space, so that the pump has higher efficiency, stronger suction capacity and larger discharge pressure, and the working efficiency of the pump is improved well. When the pump stops running, the liquid storage cavity inlet one-way valve 12 and the liquid storage cavity outlet one-way valve 3 can return to the initial positions under the action of pressure, liquid backflow is effectively prevented, liquid is filled in the pump, the pump is restarted, the working state can be directly entered, and the running process is the same as above.

The examples are preferred embodiments of the present invention, but the present invention is not limited to the above-described embodiments, and any obvious modifications, substitutions or variations that can be made by one skilled in the art without departing from the spirit of the present invention are within the scope of the present invention.

The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.

Claims (9)

1. The four-phase reciprocating pump driven by the gears is characterized by comprising a shell (1), and a working cavity inner wall (10) arranged in the shell (1), wherein the working cavity inner wall (10) divides an inner cavity of the shell (1) into a working cavity (15) and a liquid storage cavity (16), the shell (1) is provided with a liquid storage cavity outlet pipeline (2) and a liquid storage cavity inlet pipeline (11), and the liquid storage cavity outlet pipeline (2) and the liquid storage cavity inlet pipeline (11) are communicated with the outside of the shell (1); the working cavity (15) is communicated with the outside of the shell (1) through an outlet pipeline (5) and a working cavity inlet pipeline (14), the outlet pipeline (5) and the working cavity inlet pipeline (14) penetrate through the shell (1) and the working cavity inner wall (10), the working cavity inner wall (10) is provided with at least four communication holes, and the communication holes are used for communicating the working cavity (15) with the liquid storage cavity (16); a piston (9) is arranged in the communication hole, and the piston (9) can separate the working cavity (15) from the liquid storage cavity (16); the piston (9) is connected with an eccentric gear transmission mechanism (7); a chain transmission mechanism (8) is arranged in the working cavity (15), the chain transmission mechanism (8) is connected with the eccentric gear transmission mechanism (7), and one-way valves are arranged in the liquid storage cavity outlet pipeline (2), the liquid storage cavity inlet pipeline (11), the outlet pipeline (5) and the working cavity inlet pipeline (14);

The eccentric gear transmission mechanism (7) comprises a driving gear (74), a driven gear (73), a driven gear shaft (72), a fixed rod (71), a transmission rod (79), an end plate (75), a pulley (78) and a driving gear shaft (76), wherein the driving gear shaft (76) rotates under the action of the chain transmission mechanism (8) and drives the driving gear (74) to rotate, the driven gear (73) rotates around the driven gear shaft (72) under the drive of the driving gear (74), the driven gear (73) and the driving gear (74) are eccentric gears, the driving gear shaft (76) penetrates through the end plates (75) on two sides and the fixed rods (71) on two sides, the driven gear shaft (72) penetrates through the end plates (75) on two sides and the pulley (78), the pulley (78) is connected with the transmission rod (79), and the transmission rod (79) penetrates through the fixed rod (71) to be connected with the piston (9).

The eccentric gear transmission mechanism (7) is driven by the chain transmission mechanism (8) to reciprocate, the piston (9) is driven by the eccentric gear transmission mechanism (7) to reciprocate, and the reciprocating motion of the piston (9) drives the volume change of the liquid storage cavity (16) to finish the working process.

2. The gear-driven four-phase reciprocating pump according to claim 1, wherein the chain transmission mechanism (8) is composed of a motor shaft of a driving chain, a transmission chain (82) and four transmission shafts (81) driven by the transmission chain (82), the transmission shafts (81) are regularly distributed in four directions of up, down, left and right, the transmission shafts (81) are cylindrical,

The transmission shaft (81) cuts a part of circular arc along the high direction of the cylindrical contact surface of the gear driven by the transmission chain (82) and the contact surface of the transmission shaft driving gear transmission mechanism to form a plane for bearing circumferential moment so as to fix the gear.

3. The gear-driven four-phase reciprocating pump according to claim 2, wherein the inner wall (10) of the working chamber is provided with four communication holes, namely four eccentric gear transmission mechanisms (7), the transmission rod (79) is driven by the eccentric gears to reciprocate, and meanwhile, the transmission rod (71) is constrained to reciprocate only in the horizontal or vertical direction, four driving gear shafts (76) uniformly distributed in the four directions of up, down, left and right are connected to four driving gears (74), the end plates (75) are connected through fixing nails (77), and the end plates (75) are distributed on two sides of the driving gears (74) and the driven gears (73) to constrain the driving gears (74) and the driven gears (73).

4. The gear-driven four-phase reciprocating pump according to claim 1, characterized in that the radius ratio of the driving gear (74) to the driven gear (73) is 1:1, the gear ratio is 1:1, and the distance from the eccentric gear shaft of the driving gear (74) to the driven gear (73) to the gear center is 3/4 of the gear radius.

5. Gear-driven four-phase reciprocating pump according to claim 1, characterized in that the piston (9) is connected with a transmission rod (79) of an eccentric gear transmission mechanism (7), the reciprocating motion is driven by the eccentric gear transmission mechanism (7) to cause the internal volume of a liquid storage cavity (16) to change so as to generate pressure change to finish the working process, and the diameter ratio of the piston (9) to the diameter of a working cavity (15) is 6:1.

6. Gear driven four-phase reciprocating pump according to claim 1, characterized in that the reservoir inlet line (11) is arranged at the bottom of the housing (1), the one-way valve comprises a reservoir inlet one-way valve (12) arranged in the reservoir inlet line (11), a reservoir outlet one-way valve (3) arranged in the reservoir outlet line (2), a working chamber outlet one-way valve (4) arranged in the working chamber outlet line (5) and a working chamber inlet one-way valve (13) arranged in the working chamber inlet line (14).

7. The gear-driven four-phase reciprocating pump according to claim 6, wherein a working chamber inlet filter gasket (131) is arranged in front of the inlet pipeline check valve (13), the working chamber inlet filter gasket (131) is used for filtering impurities contained in air in an air inlet process, a working chamber outlet filter gasket (44) is arranged on the inner side of the working chamber outlet check valve (5), lubricating oil in discharged working chamber gas can be filtered out of the working chamber outlet filter gasket (44), the thickness ratio of the working chamber inlet filter gasket (131) to the working chamber outlet filter gasket (44) is 1:1, cylindrical surfaces of the working chamber inlet filter gasket (131) and the working chamber outlet filter gasket (44) are tightly attached to the inner walls of the working chamber inlet pipeline (14) and the working chamber outlet pipeline (5), a fastening ring (136) is arranged on the outer side of the working chamber inlet filter gasket (131) and the inner side of the working chamber outlet filter gasket (44), and the fastening ring (136) can fix the working chamber inlet filter gasket (131) and the working chamber outlet filter gasket (44) while ensuring small inlet-outlet resistance.

8. The gear-driven four-phase reciprocating pump according to claim 7, wherein the included angle between the working chamber inlet pipeline (14) and the working chamber outlet pipeline (5) is 90 degrees, the included angles between the working chamber inlet pipeline (14) and the working chamber outlet pipeline (5) and the vertical direction are 45 degrees, the directions are obliquely upward, the working chamber inlet pipeline (14) and the working chamber outlet pipeline (5) are distributed on two sides of the liquid storage chamber outlet pipeline (2), and the ratio of the thickness of the working chamber inlet pipeline (14) to the thickness of the shell (1) is 1:2.

9. The gear-driven four-phase reciprocating pump according to claim 6, wherein the liquid storage cavity inlet one-way valve (12) is composed of a one-way valve fixer (121), a spring (122), a valve body (123), a base (125) and a through hole (124), the two ends of the one-way valve fixer (121) are provided with the through hole (124), the upper end of the spring (122) is fixed at the center position of the one-way valve fixer (121), the lower end is fixed at the upper end of the valve body (123), the lower end of the valve body (123) is tightly attached to the upper end of the base (125), and the fixed position of the one-way valve is the center of the spring (122); the liquid storage cavity outlet one-way valve (3) and the liquid storage cavity inlet one-way valve (12) are identical in structure.