CN112177991A - Novel AC servo pump control oil cylinder system based on electromagnetic valve - Google Patents
Novel AC servo pump control oil cylinder system based on electromagnetic valve Download PDFInfo
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- CN112177991A CN112177991A CN202011149317.3A CN202011149317A CN112177991A CN 112177991 A CN112177991 A CN 112177991A CN 202011149317 A CN202011149317 A CN 202011149317A CN 112177991 A CN112177991 A CN 112177991A
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- valve block
- valve
- servo
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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
- F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
- F15B9/02—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type
- F15B9/03—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member with servomotors of the reciprocatable or oscillatable type with electrical control means
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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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
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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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/18—Combined units comprising both motor and pump
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/202—Externally-operated valves mounted in or on the actuator
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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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
- F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
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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
- F15B2013/0448—Actuation by solenoid and permanent magnet
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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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a novel AC servo pump control oil cylinder system based on an electromagnetic valve, which mainly comprises a motor, a hydraulic cylinder, a hydraulic pump connected with the motor, a valve block assembly integrated on the hydraulic cylinder and a stroke sensor, wherein the hydraulic cylinder is connected with the motor; the valve block assembly mainly comprises a valve block, a temperature sensor, a plurality of safety valves, a plurality of pressure sensors, an energy accumulator and a plurality of electromagnetic ball valves; the above components are integrated respectively on the external mounting base of the valve block. According to the scheme, the pump control technology is adopted, so that the hydraulic cylinder can be directly controlled to move without a throttling element; and an electromagnetic ball valve is adopted as a system flow compensation valve, so that the pressure matching problem of each hydraulic element of hydraulic compensation can be avoided, and the energy-saving effect is achieved.
Description
Technical Field
The invention relates to the technical field of mechanical control, in particular to a novel AC servo pump control oil cylinder system based on an electromagnetic valve.
Background
The electro-hydraulic control technology mainly comprises two types of pump control and valve control. At present, valve control is widely applied, and the biggest defects are throttling and overflow loss and low energy efficiency. The low energy efficiency not only increases the installed power of the system, but also causes the heating of the system, thereby bringing about a series of problems.
It follows that how to be able to directly control the hydraulic cylinder movement and to be able to solve the internal pressure matching problem is a problem to be solved in the art in order to solve the problem at all.
Disclosure of Invention
Aiming at the technical problems of the existing servo motor, the invention aims to provide a novel AC servo pump control oil cylinder system based on an electromagnetic valve, which can directly control the movement of a hydraulic cylinder and adopts an electromagnetic ball valve as a system flow compensation valve so as to achieve the effect of energy conservation.
In order to achieve the purpose, the invention provides a novel AC servo pump control oil cylinder system based on an electromagnetic valve, which comprises a hydraulic cylinder, a hydraulic pump, a hydraulic valve block assembly, a servo motor, a servo driver and a controller, wherein the hydraulic cylinder is connected with the hydraulic pump; the controller, the servo driver, the servo motor and the hydraulic pump are sequentially connected in a control mode; the hydraulic pump is communicated with the hydraulic cylinder through a valve block assembly; the valve block assembly is formed on the basis of an electromagnetic valve, is positioned between the hydraulic pump and the hydraulic cylinder, and is used for controlling the hydraulic pump and detecting the internal running state of the hydraulic cylinder; the hydraulic valve block assembly is connected with the controller and feeds back detection data in the hydraulic cylinder to the controller.
Furthermore, one end of the hydraulic cylinder is connected with a stroke sensor.
Further, the travel sensor is connected with the controller and used for feeding back the sensed displacement value to the controller.
Furthermore, the hydraulic pump is a high-pressure bidirectional motor hydraulic pump, and is divided into two oil paths in the hydraulic cylinder.
Furthermore, the valve block assembly comprises a valve block, a temperature sensor, a plurality of safety valves, a plurality of pressure sensors, an energy accumulator and a plurality of electromagnetic ball valves; the temperature sensor, the safety valves, the pressure sensors, the energy accumulator and the electromagnetic ball valves are integrated on the installation base surface of the valve block; the pressure sensors and the safety valves are symmetrically connected in series on the two oil paths respectively; the electromagnetic ball valves are symmetrically arranged on the two oil paths.
Furthermore, a plurality of pipe connectors are arranged on the mounting base surface of the valve block; a plurality of pipelines corresponding to the pipe interfaces are arranged in the valve block; the pipelines are communicated with each other.
Further, the stroke sensor is a magnetostrictive built-in sensor.
According to the novel AC servo pump control oil cylinder system, the servo motor directly drives the constant delivery pump by adopting a pump control technology, the hydraulic cylinder is directly controlled to move without passing through a throttling element, and the electromagnetic ball valve is used as a system flow compensation valve, so that the pressure matching problem of each hydraulic element of hydraulic compensation can be avoided, and the energy-saving effect is achieved.
Drawings
The invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a schematic structural diagram of an AC servo pump control oil cylinder in the scheme;
FIG. 2 is a schematic structural view of a valve block fitting in the present embodiment;
FIG. 3 is a schematic view of the internal structure of the valve block in the present embodiment;
fig. 4 is a schematic diagram of the principle of the AC servo pump control cylinder system in the present scheme.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
Referring to fig. 1, which is a schematic structural diagram of an AC servo pump control cylinder system in the present embodiment, it can be seen that the AC servo pump control cylinder mainly comprises a hydraulic pump 500, a hydraulic cylinder 200, a hydraulic valve block assembly 100, and a stroke sensor 300.
The hydraulic valve block assembly 100 is mounted at one end above the hydraulic cylinder 200 and is connected with the hydraulic cylinder 200 through a bolt; the stroke sensor 300 is integrated into the hydraulic cylinder 200 by means of a thread connection, using a magnetostrictive built-in sensor.
Specifically, referring to fig. 2 to 4, in the present embodiment, the hydraulic valve block assembly 100 is composed of a valve block 110, a temperature sensor 120, a first safety valve 130a, a second safety valve 130b, a first pressure sensor 140a, a second pressure sensor 140b, a first electromagnetic ball valve 150a, a second electromagnetic ball valve 150b, a fuel filler 160 and an accumulator 170. The above components are mounted on the mounting base surface of the valve block 110, and are fixed on the valve block 110 by being connected with the interface on the valve block 110;
specifically, the valve block 110 is a mounting body, and is often connected to the hydraulic cylinder 200 by bolts. The hydraulic oil transmission device is provided with 5 installation base surfaces, namely an upper end surface 111, a first side surface 112, a second side surface 113, a third side surface (not marked in the figure) and a fourth side surface (not marked in the figure), wherein each end surface is provided with a plurality of pipe joints, and the pipe joints on the corresponding end surfaces in the inner part are provided with a plurality of mutually communicated pore channels for transmitting hydraulic oil.
The structure of the valve block 110 is well known to those skilled in the art and will not be described herein.
Further, the upper end surface 111 of the valve block is provided with an oil port 160 for injecting hydraulic oil; the accumulator 170 is mounted to the upper end face 111 of the valve block.
The accumulator 170 here has several main roles in the system:
(1) when the piston rod of the hydraulic cylinder 200 extends out, the oil in the accumulator is released to be supplemented into the system, and when the piston rod of the hydraulic cylinder retracts, the redundant oil in the system is recovered to the accumulator, so that the function of storing the oil tank is achieved.
(2) Because the hydraulic circuit in the hydraulic valve block 110 is complicated, the whole system has certain pressure loss, the pumping of the hydraulic pump is easy to cause, the oil cylinder crawls to generate noise, the energy accumulator provides positive pressure in the system, and the pumping problem of the oil pump is solved.
(3) The hydraulic pump 500 leaks oil to be stored in the accumulator 170.
Further, a temperature sensor 120 for detecting the internal temperature of the valve block is disposed at the first side 112 of the valve block 110; the first safety valve 130a and the second safety valve 130b are symmetrically arranged on the first side surface 112 of the valve block 110, and are used for controlling the hydraulic pressure inside the valve block 110, so that the operation of equipment is protected.
The temperature sensor 120 and the safety valve are well known to those skilled in the art and will not be described herein; secondly, the number of the safety valves is not limited and can be determined according to actual conditions.
The first electromagnetic ball valve 150a and the second electromagnetic ball valve 150b are symmetrically disposed on the second side surface 113 of the valve block, and are electrically energized to open and close an oil path. The first and second pressure sensors 140a and 140b are symmetrically disposed on the second and fourth sides 113 and 110, respectively, and are used for detecting pressure values in the valve block.
The construction of the electromagnetic ball valve and the pressure sensor is well known to those skilled in the art and will not be described herein; and the number of the electromagnetic ball valves and the number of the pressure sensors are not limited and can be determined according to actual conditions.
The installation base surface on which the component is installed is not limited and can be determined according to actual conditions; secondly, the size of the components is determined according to the required condition, and the components are not interfered with each other when being installed.
The stroke sensor 300 is used for detecting a displacement value, and the present solution is preferably a magnetostrictive built-in sensor, which is not easily damaged and has reliable performance, and is integrated at one end of the hydraulic cylinder 200 by a threaded connection.
The construction of the travel sensor 300 is well known to those skilled in the art and will not be described in detail herein.
The hydraulic pump 500 is matched with the hydraulic cylinder 200, and the hydraulic cylinder 200 can be driven to extend and retract by the rotation of the hydraulic pump 500. Preferably, the hydraulic pump 500 in the present embodiment is a high-pressure bidirectional motor hydraulic pump, and the hydraulic cylinder 200 is divided into two oil paths, wherein the first pressure sensor 140a, the second pressure sensor 140b, the first relief valve 130a, and the second relief valve 130b are respectively connected in series and symmetrically on the two oil paths; the first electromagnetic ball valve 150a and the second electromagnetic ball valve 150b are symmetrically arranged on two oil paths.
The construction of the hydraulic pump 500 and the hydraulic cylinder 200 is well known to those skilled in the art and will not be described herein.
The second electromagnetic ball valve 15b is powered to supplement oil to the inside of the hydraulic cylinder, when hydraulic oil passes through the two oil paths respectively and passes through the first pressure sensor 140a or the second pressure sensor 140b, detection is carried out, if the hydraulic oil pressure is too high, the first safety valve 130a or the second safety valve 130b is opened, and at the moment, the hydraulic oil returns to the hydraulic pump 500 through backflow; if the pressure is within the normal range, the transmission is continued, and finally, the excess hydraulic oil is recovered to the accumulator 170 through the first electromagnetic ball valve 15 a.
According to the scheme, a servo driver 700, a controller 600 and a servo motor 400 are matched on the basis of a servo pump control oil cylinder; the controller 600 is used for sending commands and receiving signals, and has one end connected to the stroke sensor 300 and the other end connected to the servo driver 700.
The other end of the servo driver 700 is connected with the servo motor 400; the servo motor 400 is connected to the hydraulic pump 500. The servo motor 400 drives the hydraulic pump 500 to rotate through the servo driver 700 according to a command input from the controller, and the hydraulic cylinder 200 extends by the rotation of the hydraulic pump 500.
The working process of the method in application is illustrated as follows.
The utility model provides a novel AC servo pump accuse hydro-cylinder based on hydraulic pressure compensation is right, and it is when concrete application, controller 600 sends the instruction, and servo motor 400 receives and drives hydraulic pump 500 through servo driver 700 after the instruction and rotates, and pneumatic cylinder 200 stretches out this moment.
At this time, when the controller 600 instructs the servo motor 400 to rotate clockwise as specified, the second electromagnetic ball valve 15b is energized to replenish the hydraulic oil in the hydraulic oil injection system in the accumulator 170, the temperature sensor 120, the stroke sensor 300, and the pressure sensor in the valve block 110 feed back signals sensed during operation to the controller 600, and the controller 600 amplifies and compares the signals to correct the rotation speed of the motor.
When the hydraulic cylinder retracts, the controller 600 instructs the servo motor 400 to rotate counterclockwise according to the specification, the first electromagnetic ball valve 15a is powered on, redundant hydraulic oil is recycled into the energy accumulator 170, and the internal safety valve controls the hydraulic pressure to play a safety role.
According to the AC servo pump control oil cylinder system formed by the scheme, the servo motor directly drives the constant delivery pump by adopting a pump control technology, and the hydraulic cylinder is directly controlled to move without passing through a throttling element. It has the following advantages:
(1) the high integration of the pressure, temperature and stroke sensor is realized by integrating the pressure, temperature and stroke sensors on the valve block and the hydraulic cylinder, the structure is simple, and the arrangement is easy.
(2) The energy accumulator has the function of an oil tank and can also perform a pressurization effect on the system, and the problems of oil cylinder crawling, system noise and the like caused by overlarge damping are reduced.
(3) The hydraulic oil pump adopts a high-pressure bidirectional plunger motor, so that the rated voltage of the system is improved, and the working efficiency is improved.
(4) The electromagnetic ball valve is used as a system flow compensation valve, so that the pressure matching problem of each hydraulic element of hydraulic compensation can be avoided, and the energy-saving effect is achieved.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. A novel AC servo pump control oil cylinder system based on an electromagnetic valve comprises a hydraulic cylinder, a hydraulic pump, a hydraulic valve block assembly, a servo motor, a servo driver and a controller; the system is characterized in that the controller, the servo driver, the servo motor and the hydraulic pump are sequentially connected in a control way; the hydraulic pump is communicated with the hydraulic cylinder through a valve block assembly; the valve block assembly is formed on the basis of an electromagnetic valve, is positioned between the hydraulic pump and the hydraulic cylinder, and is used for controlling the hydraulic pump and detecting the internal running state of the hydraulic cylinder; the hydraulic valve block assembly is connected with the controller and feeds back detection data in the hydraulic cylinder to the controller.
2. The novel AC servo pump control oil cylinder system based on the electromagnetic valve is characterized in that one end of the hydraulic cylinder is connected with a stroke sensor.
3. The electromagnetic valve-based novel AC servo pump control cylinder system according to claim 2, wherein the stroke sensor is connected with the controller for feeding back the sensed displacement value to the controller.
4. The electromagnetic valve-based novel AC servo pump control oil cylinder system as claimed in claim 1, wherein the hydraulic pump is a high-pressure bidirectional motor hydraulic pump, and is divided into two oil paths in the hydraulic cylinder.
5. The electromagnetic valve based novel AC servo pump control oil cylinder system is characterized in that the valve block assembly comprises a valve block, a temperature sensor, a plurality of safety valves, a plurality of pressure sensors, an energy accumulator and a plurality of electromagnetic ball valves; the temperature sensor, the safety valves, the pressure sensors, the energy accumulator and the electromagnetic ball valves are integrated on the installation base surface of the valve block; the pressure sensors and the safety valves are symmetrically connected in series on the two oil paths respectively; the electromagnetic ball valves are symmetrically arranged on the two oil paths.
6. The novel AC servo pump control oil cylinder system based on the electromagnetic valve as claimed in claim 1, wherein a plurality of pipe interfaces are arranged on the mounting base surface of the valve block; a plurality of pipelines corresponding to the pipe interfaces are arranged in the valve block; the pipelines are communicated with each other.
7. The novel AC servo pump control cylinder system based on the electromagnetic valve as claimed in claim 1, wherein the stroke sensor is a magnetostrictive built-in sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149317.3A CN112177991A (en) | 2020-10-23 | 2020-10-23 | Novel AC servo pump control oil cylinder system based on electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011149317.3A CN112177991A (en) | 2020-10-23 | 2020-10-23 | Novel AC servo pump control oil cylinder system based on electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112177991A true CN112177991A (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011149317.3A Pending CN112177991A (en) | 2020-10-23 | 2020-10-23 | Novel AC servo pump control oil cylinder system based on electromagnetic valve |
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| Country | Link |
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| CN (1) | CN112177991A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550942A (en) * | 2021-07-15 | 2021-10-26 | 南通睿基自动化技术有限公司 | Electrohydraulic control hydraulic vibration cylinder of servo pump |
-
2020
- 2020-10-23 CN CN202011149317.3A patent/CN112177991A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113550942A (en) * | 2021-07-15 | 2021-10-26 | 南通睿基自动化技术有限公司 | Electrohydraulic control hydraulic vibration cylinder of servo pump |
| CN113550942B (en) * | 2021-07-15 | 2024-03-29 | 南通睿基自动化技术有限公司 | Electrohydraulic control hydraulic vibration cylinder of servo pump |
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