CN109630491B - Electric control compensation two-way proportional flow valve - Google Patents
Electric control compensation two-way proportional flow valve Download PDFInfo
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- CN109630491B CN109630491B CN201811600410.4A CN201811600410A CN109630491B CN 109630491 B CN109630491 B CN 109630491B CN 201811600410 A CN201811600410 A CN 201811600410A CN 109630491 B CN109630491 B CN 109630491B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/026—Pressure compensating valves
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Abstract
The invention provides an electric control compensation two-way proportional flow valve, which adopts a novel electronic pressure compensation valve or an electro-hydraulic pressure compensation valve, and an oil outlet B of the electronic pressure compensation valve or the electro-hydraulic pressure compensation valve1With main valve oil inlet PAControl cavity P of electronic pressure compensation valve or electro-hydraulic pressure compensation valveFThrough, main valve oil outlet PBWith the second control chamber P of the electronic or electrohydraulic pressure compensating valveEAnd (4) communicating. The invention designs a novel element electronic pressure compensation valve and an electro-hydraulic pressure compensation valve, adopts an electronic control unit to control and detect the position of a compensation valve core, realizes the closed-loop control of the compensation valve core and the continuous regulation and control of compensation differential pressure, improves the flow control precision of the whole valve, enhances the flow regulation rigidity of load change resistance, and has the advantages of simple structure, good dynamic characteristic and high-precision flow steady-state control.
Description
Technical Field
The invention belongs to a two-position two-way proportional flow valve, and particularly relates to an electric control compensation two-way proportional flow valve.
Background
The two-way proportional flow valve is used as a core element of an electro-hydraulic control system of major mechanical equipment, can continuously control the flow of a hydraulic actuator, and is widely applied to the fields of ocean engineering, railway tunnels, aerospace, nuclear power and the like. From the valve port flow equation
It can be seen that the flow rate through the proportional flow valve is not only related to the valve port opening area a, but also affected by the change in the differential pressure Δ p across the valve port.
In order to eliminate the influence of load variation, as shown in fig. 1, a conventional flow valve is connected with a pressure compensation valve in series at the inlet or the outlet of a proportional throttle valve, so as to maintain the pressure difference Δ p between the two ends of the throttle valve constant and realize the proportional control of the through-flow. However, the flow control valve has poor controllability and slow dynamic response in a low working pressure range; meanwhile, due to the influences of the hydraulic force and the dynamic frequency response of the compensating valve core, the pressure difference delta p of the throttle valve is large in fluctuation, large flow deviation exists, load pressure step starting flow overshoot exists, and a steady-state load characteristic curve and a load step response characteristic curve are respectively shown in fig. 2 and fig. 3.
In order to improve the control accuracy and dynamic characteristics of a proportional flow valve, a two-way cartridge valve is used as a dynamic flow sensor to detect the flow of the valve, the flow passing through the sensor is converted into the displacement or differential pressure of a valve element of the two-way cartridge valve, and the displacement or differential pressure is used as a feedback signal to control the flow of the valve in a closed loop manner. However, the disadvantage of this valve is that the structure is complicated and it is not suitable for a large flow control valve.
Disclosure of Invention
In order to solve the problems, the invention aims to provide the electric control compensation two-way proportional flow valve which is simple in structure, good in dynamic characteristic and large in regulation range, overcomes the defects of large flow overshoot of the traditional flow valve under load step and starting step, and realizes high-precision flow steady-state control.
In order to achieve the purpose, the invention adopts the following technical scheme: an electronic control compensation two-way proportional flow valve comprises a proportional pilot valve (1), a main valve (6) and an I displacement sensor (10); the proportional pilot valve comprises a pilot valve core (2), an I-th proportional electromagnet (3), a pilot valve spring (4), a pilot valve body (5) and a pilot valve oil inlet (A)2) And pilot valve oil outlet (B)2) (ii) a The main valve comprises a main valve core (7), a main valve sleeve (8), a main valve reset spring (9) and a main valve oil inlet (P)A) Main valve oil outlet (P)B) And a main valve control chamber (P)C) (ii) a The first displacement sensor is arranged on the main valve core and used for detecting the displacement of the main valve core; the hydraulic control system is characterized by further comprising an electronic pressure compensation valve (11) or an electro-hydraulic pressure compensation valve (12), wherein the specific type of the pressure compensation valve is determined by load pressure and flow;
the electronic pressure compensation valve is a pressure compensation valve controlled by a proportional electromagnet or a pressure compensation valve controlled by a linear motor or a rotating motor driving ballThe pressure compensating valve controlled by the screw rod comprises a displacement sensor (13), a second proportional electromagnet (14), a compensating valve body (15), a compensating valve core (16), a spring (17) and an oil inlet (A) when the electronic pressure compensating valve is controlled by the proportional electromagnet1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface C of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity P with the compensating valve coreFThe second proportional electromagnet is connected with the compensating valve body, acts on the right end surface D of the compensating valve core, and forms a second control cavity P with the compensating valve core and the compensating valve bodyEThe displacement sensor and the second proportional electromagnet are integrally installed;
when the electronic pressure compensation valve is a pressure compensation valve controlled by a linear motor, the electronic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, the linear motor (18) and an oil inlet (A)1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface C of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity P with the compensating valve coreFThe linear motor is connected with the compensation valve body, arranged on the right end surface D of the compensation valve core and forms a II-th control cavity P together with the compensation valve body and the compensation valve coreE. Or
When the electronic pressure compensation valve is a pressure compensation valve controlled by a ball screw driven by a rotating motor, the electronic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, a rotating motor (19), a ball screw (20), a connecting rod (21) and an oil inlet (A)1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface C of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity P with the compensating valve coreFThe displacement sensor is arranged on the compensating valve core through the compensating valve body,directly detecting the position X and speed XV of the valve core, connecting the rotating motor with the compensating valve body, and forming a second control cavity P with the compensating valve body and the compensating valve coreEAn extension shaft of the rotating motor is connected with a screw rod of the ball screw, a nut of the ball screw is connected with the connecting rod, the rotating motor drives the ball screw to rotate, and the rotating motion of the motor is converted into linear motion through the ball screw, so that the connecting rod is driven to output different forces and displacements;
the electro-hydraulic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, an oil inlet (A), an oil outlet (B) and a first control cavity (P)F) II control chamber (P)E) And III control chamber (P)G) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface C of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity P with the compensating valve coreFThe displacement sensor is arranged on the compensating valve core through the compensating valve body to directly detect the position X and the speed XV of the valve core, and the other end of the compensating valve core forms a second control cavity P with the compensating valve body respectivelyEAnd III control chamber PG；
The connection mode of the electronic pressure compensation valve or the electro-hydraulic pressure compensation valve and the main valve is as follows:
oil outlet B of electronic pressure compensation valve or electro-hydraulic pressure compensation valve1With main valve oil inlet PAControl cavity P of electronic pressure compensation valve or electro-hydraulic pressure compensation valveFThrough, main valve oil outlet PBWith the second control chamber P of the electronic or electrohydraulic pressure compensating valveECommunicating;
when the electro-hydraulic pressure compensation valve is adopted, the proportional flow valve further comprises a pilot proportional pressure reducing valve (22), and an oil inlet A of the electro-hydraulic pressure compensation valve1The working oil port of the pilot proportional pressure reducing valve is communicated with a III control cavity P of the electro-hydraulic pressure compensation valveGAnd (4) communicating.
The electronic pressure compensation valve and the electro-hydraulic pressure compensation valve are one of a normally open type and a normally closed type.
The displacement sensor is integrated on the second proportional electromagnet, and detects the position X and the speed XV of the valve core by detecting the second proportional electromagnet, or is arranged on the compensating valve core to directly detect the position X and the speed XV of the valve core.
The second proportional electromagnet is one of a unidirectional proportional electromagnet and a bidirectional proportional electromagnet.
The rotating motor is one of a direct current motor, a synchronous motor and an asynchronous motor.
Compared with the prior art, the invention has the following beneficial effects:
the invention designs a novel element electronic pressure compensation valve and an electro-hydraulic pressure compensation valve, realizes real-time continuous regulation and control of the compensation differential pressure of the proportional flow valve, enlarges the flow regulation and control range of the proportional flow valve, changes the dynamic characteristic, and overcomes the problem of poor controllability of the traditional proportional flow valve in a low working pressure range.
The invention designs a novel element electronic pressure compensation valve and an electro-hydraulic pressure compensation valve, adopts the electronic control unit to control and detect the position of the compensation valve core, can realize the closed-loop control of the compensation valve core, further improves the flow control precision of the whole valve, enhances the load change resistance flow regulation rigidity of the flow valve, and has good steady-state load characteristic.
The invention adopts the novel element electronic pressure compensation valve and the electro-hydraulic pressure compensation valve, can realize the normal open or normal close control of the compensation valve, and solves the problems of response lag and load pressure step starting flow overshoot of the traditional flow valve adopting a decompression type compensation valve.
Drawings
FIG. 1 is a schematic diagram of a conventional proportional flow valve;
FIG. 2 is a steady state flow characteristic of a conventional proportional flow valve;
FIG. 3 is a load step characteristic of a conventional proportional flow valve;
FIG. 4 is a schematic structural component diagram of the electromagnetic proportional pilot valve of the present invention;
FIG. 5 is a schematic view of the main valve of the present invention;
FIG. 6 is a schematic diagram of a first construction of the electronic pressure compensating valve of the present invention;
FIG. 7 is a schematic diagram of a second construction of the electronic pressure compensating valve of the present invention;
FIG. 8 is a schematic diagram of a third construction of the electronic pressure compensating valve of the present invention;
FIG. 9 is a schematic diagram of the electro-hydraulic pressure compensating valve of the present invention;
fig. 10 is a schematic structural view of a proportional governor valve using an electronic pressure compensating valve according to embodiment 1 of the present invention;
fig. 11 is a schematic structural view of a proportional speed control valve using an electro-hydraulic pressure compensating valve according to embodiment 2 of the present invention.
In the figure: 1-proportional pilot valve, 2-pilot valve core, 3-proportion I electromagnet, 4-pilot valve spring, 5-pilot valve body, 6-main valve, 7-main valve core, 8-main valve sleeve, 9-main valve return spring, 10-displacement sensor I, 11-electronic pressure compensation valve, 12-electro-hydraulic pressure compensation valve, 13-displacement sensor II, 14-proportion II electromagnet, 15-compensation valve body, 16-compensation valve core, 17-spring, 18-linear motor, 19-rotary motor, 20-ball screw, 21-connecting rod and 22-pilot proportional pressure reducing valve.
Detailed Description
The principle and structure of an electrically-controlled compensated two-way proportional flow valve according to the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
Example 1
An electronic control compensation two-way proportional flow valve comprises a proportional pilot valve 1, a main valve 6 and an I displacement sensor 10;
as shown in fig. 4, the proportional pilot valve includes a pilot valve core 2, an i-th proportional electromagnet 3, a pilot valve spring 4, a pilot valve body 5, and a pilot valve oil inlet a2And pilot valve oil outlet B2；
As shown in FIG. 5, the main valve includes a main valve core 7, a main valve sleeve 8, a main valve return spring 9, a main valve oil inlet PAMain valve oil outlet PBAnd a main valve control chamber PC(ii) a A first displacement sensor 10 is arranged on the main valve element 7 and is used for detecting the displacement of the main valve element 7; it is characterized by also comprising an electronic pressure compensation valve 11;
the electronic pressure compensation valve 11 is a pressure compensation valve controlled by a proportional electromagnet 14 or a pressure compensation valve controlled by a linear motor 18 or a pressure compensation valve controlled by a ball screw 20 driven by a rotating motor 19.
As shown in fig. 6, when the electronic pressure compensating valve 11 is a pressure compensating valve controlled by the proportional electromagnet 14, it includes a displacement sensor 13, a second proportional electromagnet 14, a compensating valve body 15, a compensating valve core 16, a spring 17, and an oil inlet a1Oil outlet B1I control chamber PFAnd the second control chamber PE(ii) a The compensation valve core 16 is arranged in the compensation valve body 15, one end of the spring 17 acts on the left end surface C of the compensation valve core 16, the other end acts on the compensation valve body 15 and forms an I-th control cavity P with the compensation valve core 16FThe second proportional electromagnet 14 is connected with the compensation valve body 15, acts on the right end surface D of the compensation valve core 16, and forms a second control cavity P with the compensation valve core 16 and the compensation valve body 15EThe displacement sensor 13 and the second proportional electromagnet 14 are integrally installed;
as shown in fig. 7, when the electronic pressure compensating valve 11 is a pressure compensating valve controlled by a linear motor 18, it includes a displacement sensor 13, a compensating valve body 15, a compensating valve core 16, a spring 17, a linear motor 18, and an oil inlet a1Oil outlet B1I control chamber PFAnd the second control chamber PE(ii) a The compensation valve core 16 is arranged in the compensation valve body 15, one end of the spring 17 acts on the left end surface C of the compensation valve core 16, the other end acts on the compensation valve body 15 and forms an I-th control cavity P with the compensation valve core 16FThe displacement sensor 13 is arranged on the compensating valve core 16 through the compensating valve body 15 to directly detect the position X and the speed XV of the valve core, the linear motor 18 is connected with the compensating valve body 15 and arranged on the right end surface D of the compensating valve core 16, and forms a second control cavity P with the compensating valve body 15 and the compensating valve core 16E. Or
As shown in fig. 8, when the electronic pressure compensating valve 11 is a pressure compensating valve controlled by a rotating motor 19 driving a ball screw 20, it includes a displacement sensor 13, a compensating valve body 15, a compensating valve core 16, a spring 17, the rotating motor 19, the ball screw 20, a connecting rod 21, and an oil inlet a1Oil outlet B1I control chamberPFAnd the second control chamber PE(ii) a The compensation valve core 16 is arranged in the compensation valve body 15, one end of the spring 17 acts on the left end surface C of the compensation valve core 16, the other end acts on the compensation valve body 15 and forms an I-th control cavity P with the compensation valve core 16FThe displacement sensor 13 is arranged on the compensating valve core 16 through the compensating valve body 15 and directly detects the position X and the speed XV of the valve core, and the rotating motor 19 is connected with the compensating valve body 15 and forms a second control cavity P with the compensating valve body 15 and the compensating valve core 16EAn extending shaft of the rotating motor 19 is connected with a screw rod of the ball screw 20, a nut of the ball screw 20 is connected with the connecting rod 21, the rotating motor 19 drives the ball screw 20 to rotate, and the rotating motion of the motor is converted into linear motion through the ball screw 20, so that the connecting rod 21 is driven to output different forces and displacements;
as shown in fig. 10, the connection between the electronic pressure compensation valve 11 and the main valve 6 is as follows:
oil outlet B of electronic pressure compensation valve 111With main valve oil inlet PAThe first control chamber P of the electronic pressure compensating valve 11FThrough, main valve 6 oil outlet PBWith the second control chamber P of the electronic pressure compensating valve 11ECommunicating;
the electronic pressure compensating valve 11 is one of a normally open type and a normally closed type.
The displacement sensor 13 is integrated on the second proportional electromagnet 14, and detects the position X and the speed XV of the spool by detecting the second proportional electromagnet 14, or is installed on the compensation spool 16 to directly detect the position X and the speed XV of the spool.
The second proportional electromagnet 14 is one of a unidirectional proportional electromagnet and a bidirectional proportional electromagnet.
The rotating electric machine 19 is one of a direct current motor, a synchronous motor and an asynchronous motor.
Example 2
The second embodiment of the electric control compensation two-way proportional flow valve is the same as the first embodiment in structural composition and connection relationship, and is different from the first embodiment in that the electro-hydraulic pressure compensation valve 12 is adopted.
Electro-hydraulic pressure compensation, as shown in FIG. 9The valve 12 comprises a displacement sensor 13, a compensation valve body 15, a compensation valve core 16, a spring 17, an oil inlet A, an oil outlet B and a control cavity I PFII control chamber PEAnd III control chamber PG(ii) a The compensation valve core 16 is arranged in the compensation valve body 15, one end of the spring 17 acts on the left end surface C of the compensation valve core 16, the other end acts on the compensation valve body 15 and forms an I-th control cavity P with the compensation valve core 16FThe displacement sensor 13 is arranged on the compensating valve core 16 through the compensating valve body 15, directly detects the position X and the speed XV of the valve core 16, and the other end of the compensating valve core 16 forms a second control cavity P with the compensating valve body 15 respectivelyEAnd III control chamber PG。
As shown in FIG. 11, when the electro-hydraulic pressure compensation valve 12 is used, the proportional flow valve further comprises a pilot proportional pressure reducing valve 22, and an oil inlet A of the electro-hydraulic pressure compensation valve 121Is communicated with an oil inlet of the pilot proportional reducing valve 22, an oil outlet of the pilot proportional reducing valve 22 is communicated with an oil tank, a working oil port of the pilot proportional reducing valve 22 is communicated with a III control cavity P of the electro-hydraulic pressure compensation valve 12GAnd (4) communicating.
Claims (5)
1. An electronic control compensation two-way proportional flow valve comprises a proportional pilot valve (1), a main valve (6) and an I displacement sensor (10); the proportional pilot valve comprises a pilot valve core (2), an I-th proportional electromagnet (3), a pilot valve spring (4), a pilot valve body (5) and a pilot valve oil inlet (A)2) And pilot valve oil outlet (B)2) (ii) a The main valve comprises a main valve core (7), a main valve sleeve (8), a main valve reset spring (9) and a main valve oil inlet (P)A) Main valve oil outlet (P)B) And a main valve control chamber (P)C) (ii) a The first displacement sensor is arranged on the main valve core and used for detecting the displacement of the main valve core; the hydraulic control system is characterized by further comprising an electronic pressure compensation valve (11) or an electro-hydraulic pressure compensation valve (12), wherein the specific type of the pressure compensation valve is determined by load pressure and flow;
the electronic pressure compensation valve is a pressure compensation valve controlled by a proportional electromagnet or a pressure compensation valve controlled by a linear motor or a pressure compensation valve controlled by a ball screw driven by a rotary motorThe compensation valve, when the electronic pressure compensation valve is a pressure compensation valve controlled by a proportional electromagnet, comprises a displacement sensor (13), a second proportional electromagnet (14), a compensation valve body (15), a compensation valve core (16), a spring (17) and an oil inlet (A)1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface (C) of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity (P) with the compensating valve coreF) The second proportional electromagnet is connected with the compensating valve body, acts on the right end surface (D) of the compensating valve core, and forms a second control cavity (P) with the compensating valve core and the compensating valve bodyE) The displacement sensor and the proportional electromagnet are integrally installed;
when the electronic pressure compensation valve is a pressure compensation valve controlled by a linear motor, the electronic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, the linear motor (18) and an oil inlet (A)1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface (C) of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity (P) with the compensating valve coreF) The linear motor is connected with the compensation valve body, is arranged on the right end surface (D) of the compensation valve core, and forms a second control cavity (P) with the compensation valve body and the compensation valve coreE）；
When the electronic pressure compensation valve is a pressure compensation valve controlled by a ball screw driven by a rotating motor, the electronic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, a rotating motor (19), a ball screw (20), a connecting rod (21) and an oil inlet (A)1) Oil outlet (B)1) I control chamber (P)F) And the second control chamber (P)E) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface (C) of the compensating valve core, and the other end acts on the compensating valve body and the compensating valveThe core forms the I control chamber (P)F) The displacement sensor is installed on the compensating valve core through the compensating valve body, directly detects the position X and the speed XV of the valve core, the rotating electrical machine is connected with the compensating valve body, and forms a second control cavity (P) with the compensating valve body and the compensating valve coreE) An extension shaft of the rotating motor is connected with a screw rod of the ball screw, a nut of the ball screw is connected with the connecting rod, the rotating motor drives the ball screw to rotate, and the rotating motion of the motor is converted into linear motion through the ball screw, so that the connecting rod is driven to output different forces and displacements;
the electro-hydraulic pressure compensation valve comprises a displacement sensor, a compensation valve body, a compensation valve core, a spring, an oil inlet (A), an oil outlet (B) and a first control cavity (P)F) II control chamber (P)E) And III control chamber (P)G) (ii) a The compensating valve core is arranged in the compensating valve body, one end of the spring acts on the left end surface (C) of the compensating valve core, the other end acts on the compensating valve body and forms a first control cavity (P) with the compensating valve coreF) The displacement sensor is arranged on the compensating valve core through the compensating valve body to directly detect the position X and the speed XV of the valve core, and the other end of the compensating valve core forms a second control cavity (P) with the compensating valve body respectivelyE) And III control chamber (P)G）；
The connection mode of the electronic pressure compensation valve or the electro-hydraulic pressure compensation valve and the main valve is as follows:
oil outlet (B) of electronic pressure compensation valve or electro-hydraulic pressure compensation valve1) With main valve oil inlet (P)A) Control chamber I of electronic pressure compensation valve or electro-hydraulic pressure compensation valveF) Through, main valve oil outlet (P)B) With the second control chamber (P) of the electronic or electrohydraulic pressure compensating valveE) Communicating;
when the electro-hydraulic pressure compensation valve is adopted, the proportional flow valve further comprises a pilot proportional pressure reducing valve (22), and an oil inlet (A) of the electro-hydraulic pressure compensation valve1) Is communicated with an oil inlet of the pilot proportional pressure reducing valve, an oil outlet of the pilot proportional pressure reducing valve is communicated with an oil tank, a working oil port of the pilot proportional pressure reducing valve is communicated with a III control cavity (P) of the electro-hydraulic pressure compensating valveG) And (4) communicating.
2. An electrically controlled compensated two-way proportional flow valve according to claim 1, characterized in that: the electronic pressure compensation valve and the electro-hydraulic pressure compensation valve are one of a normally open type and a normally closed type.
3. An electrically controlled compensated two-way proportional flow valve according to claim 1, characterized in that: the displacement sensor is integrated on the second proportional electromagnet, and detects the position X and the speed XV of the valve core by detecting the second proportional electromagnet, or is arranged on the compensating valve core to directly detect the position X and the speed XV of the valve core.
4. An electrically controlled compensated two-way proportional flow valve according to claim 1, characterized in that: the second proportional electromagnet is one of a unidirectional proportional electromagnet and a bidirectional proportional electromagnet.
5. An electrically controlled compensated two-way proportional flow valve according to claim 1, characterized in that: the rotating motor is one of a direct current motor, a synchronous motor and an asynchronous motor.
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| CN201811600410.4A CN109630491B (en) | 2018-12-26 | 2018-12-26 | Electric control compensation two-way proportional flow valve |
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| CN111255944B (en) * | 2020-04-30 | 2020-08-11 | 星宇电子(宁波)有限公司 | Pilot-operated proportional flow valve with position and flow composite feedback function |
| CN113833708B (en) * | 2021-09-29 | 2024-01-19 | 太原理工大学 | Multi-way valve with inlet and outlet pressure difference detection function |
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| CN113864279B (en) * | 2021-11-17 | 2024-08-20 | 上海海岳液压机电工程有限公司 | Digital control cartridge valve with pressure compensation function |
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