CN113931887A - Mechanical closed-loop oil cylinder displacement controller - Google Patents
Mechanical closed-loop oil cylinder displacement controller Download PDFInfo
- Publication number
- CN113931887A CN113931887A CN202111303881.0A CN202111303881A CN113931887A CN 113931887 A CN113931887 A CN 113931887A CN 202111303881 A CN202111303881 A CN 202111303881A CN 113931887 A CN113931887 A CN 113931887A
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- China
- Prior art keywords
- flow distribution
- oil cylinder
- cylinder
- oil
- distribution module
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Classifications
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0406—Valve members; Fluid interconnections therefor for rotary valves
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
- F15B13/0444—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors with rotary electric motor
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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
- F15B13/16—Special measures for feedback, e.g. by a follow-up device
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- 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
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6336—Electronic controllers using input signals representing a state of the output member, e.g. position, speed or acceleration
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6656—Closed loop control, i.e. control using feedback
Abstract
The invention relates to a mechanical closed-loop oil cylinder displacement controller which comprises a signal input module, a flow distribution module and a position mechanical feedback module, wherein the flow distribution module is connected with an oil source high-pressure oil port and an oil return oil port, the flow distribution module receives torque output by the signal input module to control and drive the flow distribution module, an oil cylinder moves linearly under the control of the flow distribution module, the position mechanical feedback module detects the linear displacement of the oil cylinder, the position mechanical feedback module converts the linear displacement of the oil cylinder into driving force according to set gain, and the driving force is fed back to the flow distribution module to form mechanical closed-loop control of the flow distribution module on the movement of the oil cylinder. From the fundamental requirement of controlling the displacement of the oil cylinder, substantial product recombination and structural innovation are carried out on the displacement control of the traditional oil cylinder. The basic control function and precision requirements of the traditional structure are met, and the requirements are met from the aspects of reliability, economy, energy conservation, easiness in control and use and the like of a product, so that the high-precision control method is more widely applied to the high-precision control of the displacement of the propulsion oil cylinder.
Description
Technical Field
The invention relates to a valve control technology, in particular to a mechanical closed-loop oil cylinder displacement controller.
Background
At present, the displacement control of the oil cylinder in the traditional home and abroad changes the speed of the oil cylinder by controlling the flow of fluid through a proportional or servo pump or a valve, identifies the displacement of the oil cylinder through a displacement sensor, transmits a displacement signal to a console, and controls the flow and the on-off of the pump or the valve according to the requirement so as to realize the closed-loop control of the displacement of the oil cylinder. The proportional or servo control mode requires stable pressure of the hydraulic system, generally needs to be provided with a pressure compensation element to compensate the influence of a load on a proportional/servo pump and a valve, and the high-precision hydraulic elements such as the proportional/servo pump and the valve have poor anti-pollution capacity, high requirement on the cleanliness of oil, large pressure loss of a valve port and high power consumption, and the anti-interference capacity of an electric appliance is poor due to the adoption of analog control. For most common hydraulic systems, how to realize high-precision displacement control of the oil cylinder needs to be urgently awaited theoretical breakthrough and method innovation.
Fig. 1 is a schematic diagram showing a typical product of a cylinder displacement control in the prior art. As shown in the figure 1, the oil cylinder 1 mainly uses a displacement sensor 3 to identify the displacement of an oil cylinder piston rod, feeds back an analog quantity signal, controls a proportional valve or a servo valve 2, changes the position of a valve core, further controls the flow entering the oil cylinder, and realizes the displacement change of the oil cylinder piston rod.
However, in the above scheme, because the valve core of the proportional valve or the servo valve has high machining precision and matching precision, the requirement on the cleanliness of the hydraulic system is high, the valve port pressure drop is large, the energy consumption is high, the construction, use and maintenance costs of the hydraulic system are high, and a series of new requirements of being more reliable, more economical, more efficient, more energy-saving, more easily controlled and the like are faced to the hydraulic systems in various industries nowadays, and the traditional product scheme of fig. 1 faces new challenges and innovations.
Disclosure of Invention
Aiming at the problem of high-precision displacement control of the oil cylinder, the mechanical closed-loop oil cylinder displacement controller is provided, and has the advantages of low energy consumption, low requirements on oil cleanliness and oil viscosity, capability of avoiding load influence, strong anti-interference capability of an electric appliance, high stability, high positioning precision and simplicity in control.
The technical scheme of the invention is as follows: a mechanical closed-loop oil cylinder displacement controller comprises a signal input module, a flow distribution module and a position mechanical feedback module, wherein the flow distribution module is connected with an oil source high-pressure oil port and an oil return oil port, the signal input module outputs and controls a driving flow distribution module, an oil cylinder moves linearly under the control of the flow distribution module, the position mechanical feedback module detects the linear displacement of the oil cylinder, the position mechanical feedback module converts the linear displacement of the oil cylinder into a driving force according to a set gain, and the driving force is fed back to the flow distribution module to form mechanical closed-loop control of the flow distribution module on the movement of the oil cylinder.
Preferably, the flow distribution module comprises a valve body, a valve core and a valve sleeve, the valve body is connected with the oil source and the oil cylinder, the valve core and the valve sleeve arranged in the valve body form a direct-drive control valve for circumferential oil distribution, the valve core is driven by the signal input module, and the valve sleeve is driven by the position mechanical feedback module.
Preferably, the valve core rotates to control the connection, disconnection and opening of the high-pressure oil source and the oil cylinder, so that the hydraulic oil drives the control oil cylinder to move linearly after passing through the valve port; the position mechanical feedback module converts the linear movement of the oil cylinder into the rotation of the valve sleeve according to the set lead, and the valve sleeve is adaptive to rotate along with the valve core.
Preferably, the signal input module comprises a servo motor or a stepping motor, a motor driver and a speed reducer, the motor driver controls the servo motor or the stepping motor to rotate according to the output pulse speed and the output pulse number, the servo motor or the stepping motor drives the speed reducer in a rotating mode, the speed reducer overcomes the torque of the hydraulic power of the flow distribution module, and the speed reducer outputs and drives the flow distribution module.
Preferably, the position mechanical feedback module comprises an oil cylinder connecting rod, a high-precision equant position rod, a sleeved part and a motion conversion part, one end of the oil cylinder connecting rod is connected with the end part of a moving part piston of the oil cylinder or the motion position of an equivalent oil cylinder, the other end of the oil cylinder connecting rod is connected with the sleeved part, the high-precision equant position rod adopts a lead screw or a synchronous belt device, the sleeved part is sleeved at one end of the oil cylinder connecting rod and moves along with the oil cylinder connecting rod, the sleeved part drives the high-precision equant position rod to rotate, the high-precision equant position rod rotates to drive the motion conversion part to rotate, and the motion conversion part drives a valve sleeve of the flow distribution module to rotate.
Preferably, the sleeving part is a screw nut or a synchronous belt sliding table corresponding to the high-precision equal-division position rod.
The invention has the beneficial effects that: the mechanical closed-loop oil cylinder displacement controller carries out substantial product recombination and structural innovation on the conventional oil cylinder displacement control from the fundamental requirement of controlling the oil cylinder displacement. The innovative high-precision mechanical closed-loop oil cylinder shifter can meet the basic control function and precision requirements of the traditional structure, and meets the requirements in the aspects of reliability, economy, energy conservation, easiness in control and use and the like of products, so that new development is brought to generate positive and remarkable influence on wider application of high-precision control of the displacement of the propulsion oil cylinder.
Drawings
FIG. 1 is a schematic diagram of a typical prior art product for cylinder displacement control;
FIG. 2 is a schematic diagram of a mechanical closed-loop cylinder displacement controller of the present invention;
FIG. 3 is a block diagram of a signal input module according to the present invention;
FIG. 4 is a block diagram of the flow distribution module of the present invention;
FIG. 5 is a block diagram of a position mechanical feedback module of the present invention.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
As shown in the schematic diagram of the mechanical closed-loop cylinder displacement controller shown in fig. 2, the mechanical closed-loop cylinder displacement controller includes a signal input module 10, a flow distribution module 11, and a position mechanical feedback module 12. The mechanical closed-loop oil cylinder displacement controller is matched with a hydraulic oil source and an oil cylinder for use, and high-precision mechanical closed-loop control of the position of the oil cylinder can be realized. The flow distribution module 11 is connected with an oil source high-pressure oil port and an oil return oil port, the flow distribution module 11 receives torque output by the signal input module 10 to start and control a valve core 111 in the flow distribution module 11, the oil cylinder 1 is controlled to act, linear displacement of the oil cylinder 1 is transmitted to the position mechanical feedback module 12, the position mechanical feedback module 12 converts the linear displacement into rotary motion according to set gain at high precision, a valve sleeve 112 of the flow distribution module 11 is driven to act, and finally the control of the flow distribution module 11 on the position of the oil cylinder 1 is achieved.
As shown in fig. 3, the signal input module 10 includes a servo motor or a stepping motor 101, a motor driver 102, and a speed reducer 103, where the motor driver 102 controls the servo motor or the stepping motor 101 to rotate at a certain pulse speed and a certain number of pulses, and the speed reducer 103 is used to increase the motor torque to overcome the hydrodynamic force of the flow distribution module 11, and is configured according to the hydrodynamic force requirements of the valve core 111 and the valve sleeve 112 of the flow distribution module 11. The driving electric signal of the motor driver 102 in the signal input module 10 is supplied from the outside.
As shown in fig. 4, the flow distribution module 11 includes a valve body 110, a valve core 111, and a valve sleeve 112, the valve body 110 connects an oil source and the oil cylinder 1, the flow rate of a working medium is controlled by the built-in valve core 111 and the built-in valve sleeve 112, the valve core 111 and the valve sleeve 112 form a direct-drive control valve for circumferential oil distribution, the valve core 111 is driven by the signal input module 10, the valve sleeve 112 is driven by the position mechanical feedback module 12, and the valve sleeve 112 rotates along with the valve core 111. The valve core 111 rotates to control the connection, disconnection and opening of the high-pressure oil source and the oil cylinder 1, so that hydraulic oil drives and controls the oil cylinder 1 to move linearly after passing through the valve port, the position mechanical feedback module 12 converts the linear movement amount of the oil cylinder 1 into the rotation amount of the valve sleeve 112 according to a set lead to form a mechanical closed loop, and the valve sleeve 112 adaptively follows the valve core 111 to rotate to perform feedback regulation and control on the connection opening of the high-pressure oil source and the oil cylinder 1.
As shown in fig. 5, the position mechanical feedback module 12 includes a cylinder connecting rod 120, a high-precision position equally dividing rod 121, a sleeve member 122, and a motion converting member 123, one end of the oil cylinder 1 connecting rod 120 is connected with the piston end part of the moving part of the oil cylinder 1 or the equivalent oil cylinder moving position, the other end is connected with a connecting part 122, both ends of the oil cylinder connecting rod 120 can obtain a certain swinging amount (convenient connection) through hinging according to requirements, the high-precision equal-division position rod 121 adopts a screw rod or a synchronous belt device and the like, the sleeving part 122 is sleeved at one end of the oil cylinder connecting rod 120 and moves along with the oil cylinder connecting rod 120, the sleeving part 122 is a lead screw nut or a synchronous belt sliding table corresponding to the high-precision equant position rod 121 and drives the high-precision equant position rod to rotate, the high-precision equant position rod 121 rotates to drive the motion conversion part 123 to rotate, and the motion conversion part 123 drives the valve sleeve 112 of the flow distribution module 11 to rotate.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. The mechanical closed-loop oil cylinder displacement controller is characterized by comprising a signal input module, a flow distribution module and a position mechanical feedback module, wherein the flow distribution module is connected with an oil source high-pressure oil port and an oil return oil port, the signal input module outputs and controls a driving flow distribution module, an oil cylinder moves linearly under the control of the flow distribution module, the position mechanical feedback module detects the linear displacement of the oil cylinder, the position mechanical feedback module converts the linear displacement of the oil cylinder into a driving force according to a set gain, and the driving force is fed back to the flow distribution module to form mechanical closed-loop control of the flow distribution module on the movement of the oil cylinder.
2. The mechanical closed-loop cylinder displacement controller of claim 1, wherein the flow distribution module comprises a valve body, a valve core and a valve sleeve, the valve body is connected with the oil source and the cylinder, the valve core and the valve sleeve arranged in the valve body form a direct-drive control valve for circumferential oil distribution, the valve core is driven by the signal input module, and the valve sleeve is driven by the position mechanical feedback module.
3. The mechanical closed-loop cylinder displacement controller according to claim 2, wherein the spool rotates to control the on/off and opening of the high-pressure oil source and the cylinder, so that hydraulic oil drives the control cylinder to move linearly after passing through the valve port; the position mechanical feedback module converts the linear movement of the oil cylinder into the rotation of the valve sleeve according to the set lead, and the valve sleeve is adaptive to rotate along with the valve core.
4. The mechanical closed-loop cylinder displacement controller according to any one of claims 1 to 3, wherein the signal input module comprises a servo motor or a stepping motor, a motor driver and a reducer, the motor driver controls the servo motor or the stepping motor to rotate according to the output pulse speed and the output pulse number, the servo motor or the stepping motor rotationally drives the reducer, the reducer is configured to overcome the torque of the hydraulic power of the flow distribution module, and the reducer output drives the flow distribution module.
5. The mechanical closed-loop cylinder displacement controller according to claim 2 or 3, wherein the position mechanical feedback module comprises a cylinder connecting rod, a high-precision equal-division position rod, a sleeving member and a motion conversion member, one end of the cylinder connecting rod is connected with the end part of a moving part piston of the cylinder or an equivalent cylinder motion position, the other end of the cylinder connecting rod is connected with the sleeving member, the high-precision equal-division position rod adopts a lead screw or synchronous belt device, the sleeving member is sleeved at one end of the cylinder connecting rod and moves along with the cylinder connecting rod, the sleeving member drives the high-precision equal-division position rod to rotate, the high-precision equal-division position rod rotates to drive the motion conversion member to rotate, and the motion conversion member drives the flow distribution module valve sleeve to rotate.
6. The mechanical closed-loop cylinder displacement controller of claim 5, wherein the sleeved member is a lead screw nut or a synchronous belt sliding table corresponding to a high-precision equal-division position rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303881.0A CN113931887A (en) | 2021-11-05 | 2021-11-05 | Mechanical closed-loop oil cylinder displacement controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111303881.0A CN113931887A (en) | 2021-11-05 | 2021-11-05 | Mechanical closed-loop oil cylinder displacement controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113931887A true CN113931887A (en) | 2022-01-14 |
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ID=79285865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111303881.0A Pending CN113931887A (en) | 2021-11-05 | 2021-11-05 | Mechanical closed-loop oil cylinder displacement controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113931887A (en) |
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2021
- 2021-11-05 CN CN202111303881.0A patent/CN113931887A/en active Pending
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