CN110656998A - Annular oiling device for main shaft of large engine - Google Patents

Abstract

The application belongs to the technical field of engine lubrication systems, and in particular relates to an annular oil injection device for a large engine main shaft. The current lubrication method will bring a lot of grease waste, and will also accumulate oil stains inside the engine, which is not conducive to the long-term use of the engine. The application provides an annular oil filling device, the oil filling device includes a clamping unit, a coating unit and an oil dripping unit; the clamping unit includes a main oil tank and a clamping screw, and the main oil tank is connected with the main shaft of the engine through the clamping screw; the coating unit is mainly composed of metal It is composed of N pieces of metal rings with fixed size and gradient thickness; the oil injection unit includes an oil delivery pipe and an oil drip nozzle, and the oil drip rate is controlled with different sizes of shafts and rotation speeds. Using the rotation of the main shaft, while the main shaft rod rotates normally, the metal sheet is reciprocated by gyro precession and liquid viscous resistance. To achieve the purpose of improving the reliability and durability of the engine.

Description

A large-scale engine main shaft annular oil injection device

technical field

The application belongs to the technical field of engine lubrication systems, and in particular relates to an annular oil injection device for a large engine main shaft.

Background technique

An engine (Engine; motor) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (gasoline engines, etc.), external combustion engines (Sterling engines, steam engines, etc.), electric motors, and the like. For example, internal combustion engines usually convert chemical energy into mechanical energy. The engine applies to both the power generating unit and the entire machine including the power unit.

The large engine main shaft annular oil injection device is one of the main parts of the lubrication system. The basic task is to continuously supply lubricating oil to the friction surface of the main shaft to reduce the friction and wear of the main shaft of the engine. Although the oil injection device does not participate in the conversion of engine functions, it can ensure the normal operation of the engine and make it have a long service life.

At present, the main lubricating devices of the main shaft of the engine are splash lubrication and pressure lubrication. Pressure lubrication is a lubrication method in which lubricating oil is supplied to the friction surface under a certain pressure. The lubricating method of lubricating the friction surface by using the oil droplets or oil mist splashed by the moving parts when the engine is working is called splash lubrication. The existing lubrication method will lead to a large amount of grease waste, and will also accumulate oil dirt inside the engine, which is not conducive to the long-term use of the engine.

SUMMARY OF THE INVENTION

1. Technical problems to be solved

The lubrication devices based on the current main shaft of the engine are mainly splash lubrication and pressure lubrication. Pressure lubrication is a lubrication method in which lubricating oil is supplied to the friction surface under a certain pressure. The lubricating method of lubricating the friction surface by using the oil droplets or oil mist splashed by the moving parts when the engine is working is called splash lubrication. The existing lubrication method will bring a lot of grease waste, and will also accumulate oil dirt inside the engine, which is not conducive to the long-term use of the engine. The present application provides a large-scale engine main shaft annular oil injection device.

2. Technical solutions

In order to achieve the above-mentioned purpose, the present application provides an annular oil filling device for a large engine main shaft, which includes a holding unit, a smearing unit and an oil filling unit, the holding unit is connected with the oil filling unit, and the holding unit is connected to the main shaft. connected, the smearing unit is arranged on the main shaft;

The clamping unit includes an interconnected support rod and a lubricating oil splash-proof part, and the lubricating oil splash-proof part is connected with the main shaft; the smearing unit includes a plurality of oil delivery ring pieces, and the main shaft passes through The oil delivery ring piece; the oil injection unit comprises an oil delivery pipe, the oil delivery pipe is in contact with the lubricating oil splash-proof part, and the support rod is connected with the oil delivery pipe.

The present application provides another embodiment: it further includes an oil injector forming casing, the oil injector forming casing is disposed outside the clamping unit, the diameter of the oil delivery ring is smaller than the diameter of the oil injector forming casing, and the oil delivery pipe Mold the housing through the oiler.

The present application provides another embodiment: the formed housing of the oil injector is fixedly connected with the support rod.

The application provides another embodiment: the oil transfer ring is a double-layered ring structure, the inner diameter of the oil transfer ring is twice the diameter of the main shaft, and the outer diameter of the oil transfer ring is the same as that of the main shaft. 3.5 times the diameter of the spindle.

The present application provides another embodiment: the oil transfer ring piece includes a groove, the thickness of the oil transfer ring piece is 0.5-1 mm, and the thickness of the groove is 1/2 of the thickness of the oil transfer ring piece.

The present application provides another embodiment: a rubber ring is provided on the inner side of the oil transfer ring piece.

The present application provides another embodiment: the lubricating oil splash-proof part is connected with the main shaft through a bearing.

The present application provides another embodiment: the outer portion of the lubricating oil splash-proof portion has an arc-shaped structure.

The present application provides another embodiment: the support rod is threadedly connected to the lubricating oil splash-proof part.

The present application provides another embodiment: the thickness of the lubricating oil splash-proof portion is 0.5 cm to 1 cm.

3. Beneficial effects

Compared with the prior art, the beneficial effects of the large-scale engine main shaft annular oil injection device provided by the present application are:

The large-scale engine main shaft annular oiling device provided by the present application adopts the principle of liquid viscous force and rigid body precession to manufacture and utilize the rotation of the main shaft of the engine so that the annular lubricating sheet can reciprocate on the main shaft, so that the main shaft can be effectively lubricated.

The large-scale engine main shaft annular oil filling device provided by this application includes a clamping unit, a coating unit and an oil injection unit; the clamping unit includes a main oil tank and a clamping screw, and the main oil tank is connected to the engine main shaft port through the clamping screw; the coating unit is mainly made of metal It is composed of N pieces of metal rings with fixed size and gradient thickness; the oil injection unit includes an oil delivery pipe and an oil drip nozzle, and the oil drip rate is controlled with different sizes of shafts and rotation speeds.

The large-scale engine main shaft annular oiling device provided by the present application utilizes the rotation of the main shaft to drive the metal sheet to reciprocate by gyro precession and liquid viscous resistance while the main shaft rod rotates normally. It realizes the continuous delivery of a sufficient amount of clean lubricating oil (or oil) to the friction surfaces of all transmission parts when the engine is working, and can form a uniform oil film between the friction surfaces to achieve liquid friction, thereby reducing frictional resistance, Reduce power consumption, reduce component wear, and achieve the purpose of improving engine reliability and durability.

Description of drawings

Fig. 1 is the structure schematic diagram of the large-scale engine main shaft annular oiling device of the present application;

Fig. 2 is the partial enlarged schematic diagram of the large-scale engine main shaft annular oil injection device of the present application;

Fig. 3 is the structural representation of the oil transfer ring piece of the present application;

In the picture: 1-main shaft, 2-support rod, 3-lubricating oil splash-proof part, 4-oil delivery ring, 5-oil delivery pipe, 6-oiler molding shell, 7-groove.

Detailed ways

Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, from which those skilled in the art can clearly understand the present application and be able to implement the present application. Without departing from the principles of the present application, the features of the various embodiments may be combined to obtain new embodiments, or instead of certain features of certain embodiments, to obtain other preferred embodiments.

During precession, the object rotates at high speed around its symmetry axis (spin axis) S with an angular velocity ω, its moment of inertia is I, and its angular momentum is L. When the object rotates around the axis of symmetry, its axis of symmetry also rotates around the vertical axis (z-axis) of the fulcrum O at a certain angular velocity. This motion is called precession, and this phenomenon is also called the gyration effect.

Dynamic viscosity, also known as dynamic viscosity, absolute viscosity or simple viscosity, is defined as the ratio of stress to strain rate, and is numerically equal to ^two flat plates with an area of 1m and a distance of 1m, with a velocity of 1m/s. During relative motion, the internal frictional force generated by the interaction of the fluids between them. The unit is N·s/m ² (Newton seconds per meter square), namely Pa·s (Pascal seconds), and its dimension is M/(L·T). The coefficient of internal friction that characterizes the viscosity of a liquid, expressed in μ. The viscosity of common liquids decreases with increasing temperature, and the viscosity of common gases increases with increasing temperature.

During the working process, the following processes will occur:

Process 1 (equilibrium state 1): When the motor is not rotating, the force is only on the z-axis, that is, there is a positive support force F _N on the z-axis, and the negative gravitational force G on the z-axis balances each other, namely:

F _N = G (1)

Process 2: When the motor just rotates, the ring will obtain a positive acceleration a _x along the x-axis, causing a small displacement of the contact point

Process 3: When the perturbation is ignored, the contact point between gravity and the ring and the rod acts as a moment, there is

M=(-r)×mg (2)

Moreover, the angle between F _N and the z axis is formed, and its component force can balance a part of the friction force, that is, when there is balance:

That is, due to the action of the moment, the contact point oscillates slightly, the ring continues to accelerate, the air resistance increases, the viscous force of the oil layer increases gradually, and the resistance f _d is generated, that is, the resistance moment M _d =f _d ×r; and finally M=M _d , the ring no longer spins faster, but maintains a constant speed difference with the rod.

It can be seen that at low speed, this difference is mainly related to the viscosity of lubricating oil, and at higher speed, the influence of air resistance will also be reflected.

Process 4 (equilibrium state 2): when the ring and the rod maintain a constant speed difference, the resultant force and the resultant moment are both 0 and the ring reaches the second equilibrium state, that is, the equilibrium state during rotation. At this time, the ring has a stable angular momentum L ₀ =J ₀ ω; at this time:

f = μ ₀ F _N = μ ₀ G (4)

Among them, μ ₀ is the empirical friction coefficient of lubricating friction in this state, which is a comprehensive manifestation of the lubricating effect and viscous effect of lubricating oil.

Have:

f _da = f = μ ₀ G (5)

Disturbance 4: After the ring moves left and right along the y direction, it collides with the support wall, thereby changing the inclination state of the ring.

The inclination α in the X-axis direction; (α is the angle between the component of r in the xoz plane and the positive direction of the z-axis)

The inclination β in the y direction; (β is the angle between the intersection of the torus and the plane parallel to the xoy through the contact point and the negative x-axis; that is, the angle between the f _xoy direction and the negative x-axis)

The inclination γ in the z direction; (γ is the angle between the component of r in the yoz plane and the positive direction of the z axis) is analyzed in the same process 3 and 4, and there is only a gravitational moment when there is a force balance (2):

M=(-r)×mg (6)

The gravitational moment affects the torsion of the rigid body, that is, the contact point oscillates around α=0, as follows:

That is, when α<5°, sinα=α, ⑧ can be written as:

With this vibration, the angular momentum L _x in the x-axis direction will be generated, even if the total angular momentum L ₀ deviates from the y-axis, resulting in precession, so that the ring will be disturbed in the horizontal direction, with an inclination angle dβ in the dt time, and there are:

而油层存在一液体内摩擦力：That is, the periodic change of L _x causes the periodic change of the angle β, thereby causing the periodic change of the acceleration in the y-axis direction. However, the same precession causes the period of the ring to be elongated, and the ring will continue to tilt in one direction until the maximum

The oil layer has a liquid internal friction force:

表示液体的速度梯度。where η is the hydrodynamic viscosity coefficient, A is the contact surface area between the ring and the oil layer,

Represents the velocity gradient of the liquid.

Therefore, the oil transfer ring will reciprocate on the shaft rotating at high speed.

1-2, the present application provides an annular oil filling device for a large engine main shaft, including a clamping unit, a smearing unit and an oil filling unit, the clamping unit is connected to the oil filling unit, and the clamping unit is connected to the main shaft 1 connected, the smearing unit is arranged on the main shaft 1;

The clamping unit includes a supporting rod 2 and a lubricating oil splash-proof part 3 connected to each other, and the lubricating oil splash-proof part 3 is connected with the main shaft 1; The main shaft 1 passes through the oil delivery ring 4 ; the oil injection unit includes an oil delivery pipe 5 , which is in contact with the lubricating oil drip-proof part 3 , and the support rod 2 is in contact with the oil delivery pipe 5 . connect.

The clamping unit is arranged at the connection of the main shaft 1 of the engine, the smearing unit and the shaft rod are fully lubricated and perform periodic reciprocating motion on the shaft, and the oiling unit is located above the clamping unit for the injection of lubricating grease; The lubricating oil splash-proof part 3 is provided with connecting screw holes to be connected with the support rod 2; the oil transmission ring pieces 4 are two or more pieces. The support rod 2 is used to fix the lubricating oil splash-proof part 3 and at the same time prevent the oil transfer ring piece 4 from continuing to move. The oil delivery pipe 5 is fixed at a position of 0.5-1 cm above the lubricating oil splash-proof part 3, and is the inlet of the lubricating oil.

Further, it also includes an oil injector forming casing 6, the oil injector forming casing 6 is arranged on the outside of the clamping unit, the diameter of the oil delivery ring piece 4 is smaller than the diameter of the oil injector forming casing 6, and the oil delivery pipe 5 passes through. The casing 6 is formed through the oil injector. The oil injector molding housing 6 (including the rear plate) is a component that can be effectively combined with the existing engine through screw assembly or welding.

Further, the forming shell 6 of the oil injector is fixedly connected with the support rod 2 .

The fixed connection here can be welding or other fixing methods. The main function of the support rod 2 is to fix the position of the components, that is, to fix the position of the lubricating oil splash-proof part 3, the oil pipeline, the oil injector forming shell 6 and the whole engine.

The support rods are respectively welded or screwed with the lubricating oil splash-proof part 3, the oil pipeline, the oil injector forming shell 6 and the engine, so as to provide rigid fixation. Obviously, the lubricating oil anti-drip part 3 cannot rotate with the main shaft, but the bearing connection cannot avoid the existence of friction, so the support rod is connected to the lubricating oil anti-drip part 3 to ensure the stillness of the lubricating oil anti-drip part 3, while connecting The oil injector forms the casing 6 to ensure that the formed casing will not fall off due to vibration and overturning. At the same time, the oil pipe is connected to ensure that the oil pipe 5 and the lubricating oil splash-proof part 3 are relatively static, so that the lubricating oil can be injected into the lubricating oil to prevent splashing. part 3 surface.

The other end of the support rod 2 is fixed on the engine casing, which is a fixing device during installation (it must not be put on when it is installed on the engine, there must always be a support rod 2 to fix the position, which can be welded or It is fixed by screws, and different rod lengths can be customized according to the engine model), and the external interface of the oil pipe 5 is reserved to ensure that lubricating oil can be added outside the engine.

Further, the oil delivery ring piece 4 is a double-layer ring piece structure, the inner diameter of the oil delivery ring piece 4 is twice the diameter of the main shaft 1, and the outer diameter of the oil delivery ring piece 4 is the main shaft. 1 3.5 times the diameter.

The double-layer structure adheres and reduces the splash of oil droplets, that is, the ring takes 2.5 times to 2 times the diameter of the main shaft.

Further, the oil delivery ring piece 4 includes a groove 7 , the thickness of the oil delivery ring piece 4 is 0.5-1 mm, and the thickness of the groove 7 is 1/2 of the thickness of the oil delivery ring piece 4 .

Referring to FIG. 3 , the oil delivery ring 4 is composed of two parts as shown in the figure by welding, and the grooves 7 on the left and right of the oil delivery ring 4 of the double-layer ring structure can be partially aligned during welding.

The number of grooves 7 can be changed, but they must be symmetrically distributed to ensure that the overall quality of the oil transfer ring 4 is uniform, so that it can work normally.

It is strictly required that the inner diameter of the oil transfer ring 4 is twice the diameter of the main shaft 1 of the engine.

The gap of the groove 7 should not be too large (guaranteed to be less than 1mm) to ensure the capillary action of the lubricating grease, which can achieve the purpose of oil transportation and oil storage.

Further, a rubber ring is provided on the inner side of the oil delivery ring piece 4 .

The inside of the oil transfer ring piece 4 is protected by a hard rubber material polyurethane (PU) lining (a gap is left to ensure the normal occurrence of capillary action) to avoid wear and noise caused by direct metal collision.

Further, the lubricating oil splash-proof part 3 is connected with the main shaft 1 through a bearing.

The function of the lubricating oil splash-proof part 3 is to prevent the lubricating oil from dripping directly onto the high-speed rotating main shaft 1, and it is designed to cause a lot of loss due to splashing due to the rotating centrifugal force. The lubricating oil splash-proof part 3 and the main shaft 1 should be connected by a bearing or non-contact connection at a small interval, that is, the lubricating oil splash-proof part 3 itself does not rotate with the main shaft 1, so as to prevent the oil droplets from being directly affected by centrifugal force. The material is metal (steel), the surface is smooth, and the oil droplets form a film or agglomerate on the surface due to surface tension, and slowly slide down to the main shaft to effectively prevent splashing.

The real lubricating device is the oil ring plate 4.

Further, the outer portion of the lubricating oil splash-proof portion 3 has an arc-shaped structure.

Further, the support rod 2 is threadedly connected with the lubricating oil splash-proof portion 3 .

Further, the thickness of the lubricating oil splash-proof portion 3 is 0.5 cm to 1 cm.

The application provides a large-scale engine main shaft annular oil injection device, which is installed at the rear end of the engine as an additional part, and at the same time, an oil delivery ring 4 is installed between different parts of the engine rotor, and the longer part (≥10cm) can be installed with multiple One oil transfer ring piece 4 to ensure the lubrication effect. After the installation is completed, connect the upper end of the oil pipe 5 with any matching rubber hose to inject oil, and the oil droplets fall on the lubricating oil splash-proof part 3. Due to the action of gravity, the oil droplets first run on the lubricating oil splash-proof part 3. Then it slides off slowly, because the viscosity of the grease itself is relatively large, and an oil film is formed when it contacts the main shaft 1 of the engine, which effectively prevents the splashing of oil droplets. Then, the oil is spread evenly inside the entire engine through the oil delivery ring 4 that reciprocates left and right.

The application is a built-in firmware for an engine, which is a lubricating oil splash-proof part 3 directly installed on the main shaft of a large engine. The sheet 4 can store oil and can realize the transportation of lubricating oil. If a support device is required, only a metal rod is required to fix the oil pipeline 5 and a protective net to prevent oil droplets from splashing.

It realizes the continuous delivery of a sufficient amount of clean lubricating oil (or oil) to the friction surfaces of all transmission parts when the engine is working, and can form a uniform oil film between the friction surfaces to achieve liquid friction, thereby reducing frictional resistance, Reduce power consumption, reduce component wear, and achieve the purpose of improving engine reliability and durability.

Although the present application has been described above with reference to specific embodiments, it will be understood by those skilled in the art that many modifications may be made in configuration and detail disclosed herein within the spirit and scope of the present disclosure. The scope of protection of the present application is determined by the appended claims, and the claims are intended to cover all modifications encompassed by the literal meaning or scope of equivalents to the technical features in the claims.

Claims (10)

1. The utility model provides a large-scale engine main shaft annular oiling device which characterized in that: the oiling device comprises a clamping unit, an applying unit and an oiling unit, wherein the clamping unit is connected with the oiling unit, the clamping unit is connected with a main shaft (1), and the applying unit is arranged on the main shaft (1);

the clamping unit comprises a supporting rod (2) and a lubricating oil anti-dripping part (3) which are connected with each other, and the lubricating oil anti-dripping part (3) is connected with the main shaft (1); the smearing unit comprises a plurality of oil conveying ring pieces (4), and the main shaft (1) penetrates through the oil conveying ring pieces (4); the oiling unit comprises an oil delivery pipe (5), the oil delivery pipe (5) is in contact with the lubricating oil anti-dripping part (3), and the supporting rod (2) is connected with the oil delivery pipe (5).

2. The annular oiling device for the main shaft of the large-scale engine as recited in claim 1, wherein: still include grease squirt contour shell (6), grease squirt contour shell (6) set up in the unit outside is held to the card, oil transportation ring piece (4) diameter is less than grease squirt contour shell (6) diameter, defeated oil pipe (5) pass grease squirt contour shell (6).

3. The annular oiling device for the main shaft of the large-scale engine as recited in claim 2, wherein: the oil ejector molding shell (6) is fixedly connected with the supporting rod (2).

4. The annular oiling device for the main shaft of the large-scale engine as recited in claim 1, wherein: the oil conveying ring piece (4) is of a double-layer ring piece structure, the inner diameter of the oil conveying ring piece (4) is 2 times of the diameter of the main shaft (1), and the outer diameter of the oil conveying ring piece (4) is 3.5 times of the diameter of the main shaft (1).

5. The annular oiling device for the main shaft of the large-scale engine as recited in claim 4, wherein: the oil conveying ring piece (4) comprises a groove (7), the thickness of the oil conveying ring piece (4) is 0.5-1 mm, and the thickness of the groove (7) is 1/2 of the thickness of the oil conveying ring piece (4).

6. The annular oiling device for the main shaft of the large-scale engine as recited in claim 4, wherein: the inner side of the oil conveying ring sheet (4) is provided with a rubber ring.

7. The annular oiling device for the main shaft of the large-scale engine as defined in any one of claims 1 to 6, wherein: the lubricating oil anti-dripping part (3) is connected with the main shaft (1) through a bearing.

8. The annular oiling device for the main shaft of the large-scale engine as recited in claim 7, wherein: the outer part of the lubricating oil anti-dripping part (3) is of an arc-shaped structure.

9. The annular oiling device for the main shaft of the large-scale engine as recited in claim 7, wherein: the supporting rod (2) is in threaded connection with the lubricating oil anti-dripping part (3).

10. The annular oiling device for the main shaft of the large-scale engine as recited in claim 7, wherein: the thickness of the lubricating oil anti-dripping part (3) is 0.5 cm-1 cm.

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