CN116292475A - Double-valve-port independent control rotary direct-drive electrohydraulic servo valve - Google Patents

Double-valve-port independent control rotary direct-drive electrohydraulic servo valve Download PDF

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Publication number
CN116292475A
CN116292475A CN202310050781.4A CN202310050781A CN116292475A CN 116292475 A CN116292475 A CN 116292475A CN 202310050781 A CN202310050781 A CN 202310050781A CN 116292475 A CN116292475 A CN 116292475A
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CN
China
Prior art keywords
valve
oil
rotary direct
port
cam shaft
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202310050781.4A
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Chinese (zh)
Inventor
李建英
孔令兵
梁恒
李伟东
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Publication date
Application filed by Harbin University of Science and Technology filed Critical Harbin University of Science and Technology
Priority to CN202310050781.4A priority Critical patent/CN116292475A/en
Publication of CN116292475A publication Critical patent/CN116292475A/en
Pending legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
    • F16K31/047—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor characterised by mechanical means between the motor and the valve, e.g. lost motion means reducing backlash, clutches, brakes or return means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/52—Mechanical actuating means with crank, eccentric, or cam
    • F16K31/524—Mechanical actuating means with crank, eccentric, or cam with a cam
    • F16K31/52475—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a sliding valve
    • F16K31/52483—Mechanical actuating means with crank, eccentric, or cam with a cam comprising a sliding valve comprising a multiple-way sliding valve
    • 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
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy

Abstract

The invention relates to the technical field of hydraulic pressure, in particular to a double-valve-port independent control rotary direct-drive type electrohydraulic servo valve. The device comprises a controller, a pressure sensor, a rotation speed sensor, a servo motor, a motor seat, a sealing ring, an inner hexagonal cylindrical head screw, a side end cover, a valve body, a split valve core, a cam shaft, a deep groove ball bearing, a valve sleeve, a side end cover sealing ring, a threaded hole and a screw hole sealing ring; the controller, the pressure sensor and the rotating speed sensor together form a control closed loop with the servo motor to control the on-off and the internal flow of the servo valve; sealing rings are arranged at the bottoms of the end covers at the two sides and are fixed at the two sides of the valve body through inner hexagonal column screws; the motor drives the cam shaft to rotate, and the cam shaft drives the split valve core to move in the valve sleeve; the invention adopts the split valve core to respectively control the oil inlet and the oil outlet of the two valve ports, and compared with other servo valves, the split valve core can be matched with a control system to finely adjust the internal flow.

Description

Double-valve-port independent control rotary direct-drive electrohydraulic servo valve
Technical Field
The invention mainly relates to the technical field of hydraulic pressure, in particular to a double-valve-port independent control rotary direct-drive type electrohydraulic servo valve.
Background
The electrohydraulic servo valve has the advantages of quick response, large output power, small volume, light weight and the like, is an important servo mechanism and is widely applied to hydraulic brake systems of airplanes and civil and national defense industrial departments.
The traditional electrohydraulic servo valve has the advantages of excellent performance, complex structure, slow system response, difficult manufacture, easy blockage, very sensitive pollution to oil, higher failure rate and unstable load oil supply port and inaccurate output flow control of the valve.
Therefore, the double-valve port independent control rotary direct-drive electro-hydraulic servo valve adopts the split valve core to independently control the oil inlet and outlet of the two valve ports, thereby realizing fine adjustment of the flow in an oil way and having strong pollution resistance.
Disclosure of Invention
Based on the purpose of realizing that the internal oil way of the servo valve is simple and the double valve ports are controlled by two independent valve cores, the invention provides the direct-drive electro-hydraulic servo valve with the double valve ports for independently controlling rotation.
The invention provides a double-valve-port independent control rotary direct-drive electro-hydraulic servo valve, which is characterized by comprising the following components:
the novel hydraulic servo motor comprises a servo motor (1), a motor seat (2), a coupler (3), a motor seat sealing ring (4), an inner hexagonal cylindrical head screw (5), a side end cover (6), a valve body (7), a split valve core (8), a cam shaft (9), a lower deep groove ball bearing (10), a lower oil outlet (11), a lower oil inlet (12), a valve sleeve (13), a side end cover sealing ring (14), an upper deep groove ball bearing (15), a threaded hole (16) and a screw hole sealing ring (17).
According to the invention, two side end covers (6) are connected with a valve body (7) through an inner hexagonal cylindrical head screw (5), a side end cover sealing ring (14) is arranged at a hole of the inner hexagonal cylindrical head screw (5) to prevent oil leakage, a servo motor (1) is connected with a motor seat (2) through bolts, the motor seat (2) is fixed with the valve body (7) through the inner hexagonal cylindrical head screw (5), a motor seat sealing ring (4) is also arranged at a screw hole to prevent oil leakage, the servo motor (1) is connected with a cam shaft (9) through a coupler (3), the cam shaft (9) is matched with an upper deep groove ball bearing (15), the upper deep groove ball bearing (15) is fixed in the valve body (7), two independent split valve cores (8) are arranged in a valve sleeve (13), a hole at a rod of the split valve core (8) is aligned with a cam position of the cam shaft (9), the cam shaft (9) is matched with a lower deep groove ball bearing (10), the lower deep groove ball bearing (10) is fixed in the valve body (7), two valve ports are arranged above the valve body (7), two valve ports are arranged below the valve ports (11) and two side oil outlets (16) are arranged at the lower sides of the valve core (8) and are connected with the screw holes at the periphery of the valve body (16) to prevent oil leakage.
When the oil return valve works, the servo motor (1) receives a command signal of the controller to start to work, the cam shaft (9) is driven to rotate through the coupler (3), when the cam protruding part is in contact with the split valve core (8) Kong Zuoce, the split valve core (8) moves leftwards, when the cam protruding part is in contact with the right side of a hole of the split valve core (8), the split valve core (8) moves rightwards to influence the on-off of an oil way, when oil is required to be discharged from a left valve port above the valve body (7), the two end controllers respectively control the left motor (1) and the right motor (1) to rotate to enable the left split valve core (8) to move leftwards when oil is required to be discharged from a right valve port above the valve body (7), and when oil is returned from the left valve port, the two end controllers respectively control the left motor (1) and the right split valve core (8) to move rightwards.
The motor (1) is provided with a rotating speed sensor, a pressure sensor is arranged in an oil way and is respectively connected with controllers at two ends to realize closed-loop control, real-time control of a servo valve is achieved, when the oil inlet and outlet flow is required to be increased, the rotating speed sensor transmits the detected rotating speed of the servo motor (1) to the controller in real time, the pressure sensor transmits the detected oil way pressure to the controller in real time, the controller controls the servo motor (1) to rotate and quickens the rotating speed to enable the opening degree of the valve port to be increased to an ideal condition, when the oil inlet and outlet flow is required to be reduced, the values detected by the rotating speed sensor and the pressure sensor are transmitted to the controller in real time, and the controller controls the motor (1) to rotate and controls the rotating speed to enable the opening degree of the valve port to be reduced to the ideal condition.
The invention discloses a double-valve-port independent control rotary direct-drive electro-hydraulic servo valve, which has the beneficial effects that:
the rotary direct-drive electrohydraulic servo valve is characterized in that oil inlet and oil return are controlled by two split valve cores, the valve cores can slide in a valve sleeve, the two valve cores are driven by a cam shaft and do not interfere with each other, two valve ports are arranged at the top of the valve body, when the two valve cores move left at the same time, oil is discharged from the left valve port, oil is discharged from the right valve port, and when the two valve cores move right at the same time, oil is discharged from the right valve port.
The two split valve cores work cooperatively to realize dynamic adjustment of flow, the valve ports can be opened and closed in real time, and when the controller receives a command signal, one valve core can be independently controlled to realize oil inlet, oil return and flow fine adjustment of one valve port.
The rotary direct-drive electrohydraulic servo valve is provided with two torque motors which can rotate left and right, a valve core is driven by a convex shaft, a valve port is opened or closed, an angle sensor feeds back an angle detection result to a controller to accurately control the rotation angle of the convex shaft so as to control the movement of the valve core, an oil inlet control signal forms an internal closed loop, a pressure sensor is connected with a load port to measure pressure, the pressure detection result is transmitted to the controller, the controller further accurately controls the rotation angle of the convex shaft according to the result, and the controller forms an external closed loop, so that the position precision is ensured, and the pressure control precision is ensured.
The rotary direct-drive electro-hydraulic servo valve has the advantages of simple structure, easy processing and manufacturing, good performance, small volume, strong pollution resistance, low cost, high system response speed, high precision, no problem of pilot stage blockage, low failure rate, high reliability and wider application range, and realizes high-precision detection of the valve core position and output pressure by utilizing an advanced angle displacement detection technology and a pressure detection technology, thereby controlling the oil direction, flow and pressure of the electro-hydraulic servo system.
The internal oil way of the rotary direct-drive electrohydraulic servo valve is simpler, the processing is more convenient, and the fault points are fewer.
Drawings
FIG. 1 is a schematic diagram of a rotary direct-drive electro-hydraulic servo valve with dual ports independent control in accordance with the present invention.
FIG. 2 is a block diagram of a dual port independently controlled rotary direct drive electrohydraulic servo valve of the invention.
FIG. 3 is a schematic illustration of a cam shaft with dual ports independently controlled rotary direct drive electro-hydraulic servo valve according to the present invention.
FIG. 4 is an enlarged view of a portion of a rotary direct drive electrohydraulic servo valve having dual ports independent control in accordance with the present invention.
The marks in the figure: the novel hydraulic servo motor comprises a servo motor (1), a motor seat (2), a coupler (3), a motor seat sealing ring (4), an inner hexagonal cylindrical head screw (5), a side end cover (6), a valve body (7), a split valve core (8), a cam shaft (9), a lower deep groove ball bearing (10), a lower oil outlet (11), a lower oil inlet (12), a valve sleeve (13), a side end cover sealing ring (14), an upper deep groove ball bearing (15), a threaded hole (16) and a screw hole sealing ring (17).
Detailed Description
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. refer to the azimuth or positional relationship based on the azimuth or positional relationship shown in the drawings, and are only for convenience in describing the present invention and simplifying the description.
FIG. 1 is a schematic diagram of a rotary direct-drive electrohydraulic servo valve with dual valve ports independently controlled according to the present invention, wherein a pressure sensor is connected to the valve ports to feed back the detection result to a controller, a rotation speed sensor is connected to the motor shaft to feed back the rotation speed detection result to the controller, and the controller performs feedback control on the servo valve motor.
Fig. 2 is a structural diagram of the double-valve-port independent control rotary direct-drive electrohydraulic servo valve, and it can be seen that a split valve core (8) is arranged in a valve sleeve (13), the split valve core (8) is matched with a cam shaft (9), the cam shaft (9) is connected with a servo motor (1) through a coupler (3), and sealing rings are arranged at threaded holes (16) of the servo valve, threaded holes of end covers (6) at two sides and threaded holes of a motor base (2) to prevent oil leakage.
Fig. 3 is a diagram of a camshaft structure with double valve ports for independently controlling and rotating a direct-drive electrohydraulic servo valve, which can be seen that the camshaft (9) is a stepped shaft as a whole, a cam is arranged in the middle of the camshaft and matched with a rod hole of a split valve core (8), and the two camshafts drive the two split valve cores (8) in the servo valve to move.
Fig. 4 is a partial enlarged view of the direct-drive electrohydraulic servo valve with double valve ports independently controlled, and can be seen that a side end cover sealing ring (14) for preventing oil leakage is arranged at a servo valve body (7) and a side end cover (6), a motor seat sealing ring (4) is also arranged at the valve body (7) and a motor seat (2), and a threaded hole sealing ring (17) is also arranged at a threaded hole (16) of an upper oil port and a lower oil port, so that the servo valve is strictly sealed, and oil leakage is prevented during working.
In summary, the rotary direct-drive electrohydraulic servo valve with the double valve ports is characterized in that two split valve cores are arranged in the servo valve, the flow of oil in and out can be accurately controlled by respectively controlling the two valve cores through an external controller, the problems of unstable oil supply of a load port and inaccurate control of the output flow of the valve are solved, and the device has the advantages of strong pollution resistance, high system response speed, low failure rate, convenience in operation and capability of accurately controlling the servo valve in real time.

Claims (6)

1. The invention provides a double-valve port independent control rotary direct-drive electrohydraulic servo valve, which is characterized by comprising the following components: the novel hydraulic servo motor comprises a servo motor (1), a motor seat (2), a coupler (3), a motor seat sealing ring (4), an inner hexagonal cylindrical head screw (5), a side end cover (6), a valve body (7), a split valve core (8), a cam shaft (9), a lower deep groove ball bearing (10), a lower oil outlet (11), a lower oil inlet (12), a valve sleeve (13), a side end cover sealing ring (14), an upper deep groove ball bearing (15), a threaded hole (16) and a screw hole sealing ring (17).
2. The dual port independently controlled rotary direct drive electro-hydraulic servo valve as set forth in claim 1, wherein: the two-side end cover (6) is connected with the valve body (7) through an inner hexagonal cylindrical head screw (5), a side end cover sealing ring (14) is arranged at the hole of the inner hexagonal cylindrical head screw (5) to prevent oil leakage, the servo motor (1) is connected with the motor seat (2) through a bolt, the motor seat (2) is fixed with the valve body (7) through the inner hexagonal cylindrical head screw (5), the motor seat sealing ring (4) is arranged at the screw hole to prevent oil leakage, the servo motor (1) is connected with the cam shaft (9) through a coupler (3), the cam shaft (9) is matched with an upper deep groove ball bearing (15), the upper deep groove ball bearing (15) is fixed in the valve body (7), two independent split valve cores (8) are arranged inside the valve sleeve (13), the hole of the split valve core (8) is aligned with the cam position of the cam shaft (9), the cam shaft (9) is matched with a lower deep groove ball bearing (10), the lower deep groove ball bearing (10) is fixed in the valve body (7), two lower side ports (11) are arranged above the valve body (7), one lower side ball bearing (12) is provided with an oil outlet (16), and the periphery of the valve port (16) is connected with the screw hole to prevent oil leakage.
3. The dual port independently controlled rotary direct drive electro-hydraulic servo valve as set forth in claim 2, wherein: the oil inlet and the oil return of the rotary direct-drive electrohydraulic servo valve are controlled by two split valve cores, the valve cores can slide in the valve sleeve, the two valve cores are driven by the cam shaft and do not interfere with each other, two valve ports are arranged at the top of the valve body, when the two valve cores move leftwards at the same time, the left valve port produces oil, and when the two valve cores move rightwards at the same time, the right valve port produces oil, and the left valve port produces oil.
4. The dual port independently controlled rotary direct drive electro-hydraulic servo valve as set forth in claim 2, wherein: the two split valve cores work cooperatively to realize dynamic adjustment of flow, the valve ports can be opened and closed in real time, and when the controller receives a command signal, one valve core can be independently controlled to realize oil inlet, oil return and flow fine adjustment of one valve port.
5. The dual port independently controlled rotary direct drive electro-hydraulic servo valve as set forth in claim 2, wherein: the rotary direct-drive electrohydraulic servo valve has two torque motors which can rotate left and right, a valve core is driven by a convex shaft, a valve port is opened or closed, an angle sensor feeds back an angle detection result to a controller to accurately control the rotation angle of the convex shaft so as to control the movement of the valve core, an oil inlet control signal forms an internal closed loop, a pressure sensor is connected with a load port to measure pressure, the pressure detection result is transmitted to the controller, the controller further accurately controls the rotation angle of the convex shaft according to the result, and the controller forms an external closed loop, so that the position precision is ensured, and the pressure control precision is ensured.
6. The dual port independently controlled rotary direct drive electro-hydraulic servo valve as set forth in claim 2, wherein: the rotary direct-drive electro-hydraulic servo valve has the advantages of simple structure, easiness in processing and manufacturing, simpler oil circuit, fewer fault points, good performance, small volume, strong pollution resistance and low cost, and realizes high-precision detection of the valve core position and output pressure by utilizing an advanced angle displacement detection technology and a pressure detection technology, thereby controlling the oil direction, flow and pressure of the electro-hydraulic servo system.
CN202310050781.4A 2023-02-01 2023-02-01 Double-valve-port independent control rotary direct-drive electrohydraulic servo valve Pending CN116292475A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310050781.4A CN116292475A (en) 2023-02-01 2023-02-01 Double-valve-port independent control rotary direct-drive electrohydraulic servo valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310050781.4A CN116292475A (en) 2023-02-01 2023-02-01 Double-valve-port independent control rotary direct-drive electrohydraulic servo valve

Publications (1)

Publication Number Publication Date
CN116292475A true CN116292475A (en) 2023-06-23

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ID=86823016

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310050781.4A Pending CN116292475A (en) 2023-02-01 2023-02-01 Double-valve-port independent control rotary direct-drive electrohydraulic servo valve

Country Status (1)

Country Link
CN (1) CN116292475A (en)

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