CN219576893U - Control system of small-torque electrohydraulic actuator - Google Patents
Control system of small-torque electrohydraulic actuator Download PDFInfo
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- CN219576893U CN219576893U CN202320359872.1U CN202320359872U CN219576893U CN 219576893 U CN219576893 U CN 219576893U CN 202320359872 U CN202320359872 U CN 202320359872U CN 219576893 U CN219576893 U CN 219576893U
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Abstract
The utility model provides a control system of a small-torque electrohydraulic actuator, which comprises a hydraulic pump communicated with an oil way of the small-torque electrohydraulic actuator, and is characterized in that: the device also comprises a brushless motor connected with the hydraulic pump in a mechanical transmission way, a driver electrically connected with the brushless motor, a group of intermediate relays and a speed regulation signal source which are electrically connected with the driver, and a group of external signal sources which are electrically connected with the intermediate relays.
Description
Technical Field
The utility model relates to a control system, in particular to a control system of a low-torque electrohydraulic actuator.
Background
The small-torque electrohydraulic actuator drives the change of the flow rate of hydraulic oil mainly by electrically controlling the rotating speed of a hydraulic pump, and the hydraulic oil is used as power to control the opening and closing of a valve through the actuator and is mainly applied to pipelines of shipyards, chemical industry, petroleum and the like.
The low-torque electrohydraulic actuator is an actuating device which converts standard signals into 0-90-degree angular displacement output moment corresponding to input signals through electrohydraulic conversion and hydraulic amplification. The existing small-torque electrohydraulic actuator products in the market mostly adopt a servo pump control design, and modularized control is used, and because the cost of a servo motor and the cost of a modularized control board are high, and in the maintenance process, if a fault occurs in a use field, the maintenance is difficult for field staff, and the disassembly and the re-debugging after the service of a manufacturer are also difficult.
Disclosure of Invention
The utility model aims to solve the technical problems of high cost, difficult fault maintenance and the like of a control system in the prior art by providing a control system of a small-torque electro-hydraulic actuator.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the utility model provides a little moment of torsion electrohydraulic actuator control system, it includes the hydraulic pump that switches on with little moment of torsion electrohydraulic actuator oil circuit, its characterized in that: the device also comprises a brushless motor connected with the hydraulic pump in a mechanical transmission way, a driver electrically connected with the brushless motor, a group of intermediate relays and a speed regulation signal source which are electrically connected with the driver, and a group of external signal sources which are electrically connected with the intermediate relays.
The utility model is further characterized in that:
the set of intermediate relays electrically connected to the driver includes a first start relay, a second start relay, a reverse relay, and a stop relay.
The group of external signal sources electrically connected with the intermediate relay comprises a valve opening starting signal, a valve closing signal, a stopping signal, a forward rotation limiting signal and a reverse rotation limiting signal.
The valve opening starting signal and the forward rotation limiting signal are electrically connected with the first starting relay; the valve closing starting signal and the reverse limiting signal are electrically connected with the second starting relay; the stop signal is electrically connected with the stop relay; the valve closing signal is electrically connected with the reversing relay.
The brushless motor is connected with the hydraulic pump through a coupler.
The beneficial effects of the utility model are as follows:
because the control system of the small-torque electro-hydraulic actuator adopts the hydraulic pump which is communicated with the oil way of the small-torque electro-hydraulic actuator, the brushless motor which is in mechanical transmission connection with the hydraulic pump, the driver which is electrically connected with the brushless motor, a group of intermediate relays and a speed regulation signal source which are electrically connected with the driver, and a group of external signal sources which are electrically connected with the relays. The main components of the motor are a brushless motor, a driver and an intermediate relay, the operation performance is simpler than that of a conventional electro-hydraulic actuator on the market, the motor is more durable, and the equipment cost and the after-sale maintenance cost are also cheaper.
Drawings
The construction and further objects and advantages of the present utility model will be better understood from the following description taken in conjunction with the accompanying drawings, wherein like reference numerals identify like elements:
fig. 1 is a schematic structural view of an embodiment according to the present utility model.
Detailed Description
Specific embodiments of the present utility model will be described below with reference to the accompanying drawings.
As shown in fig. 1, a control system of a small-torque electrohydraulic actuator comprises a hydraulic pump 1 communicated with an oil path of the small-torque electrohydraulic actuator, and is characterized in that: the motor further comprises a brushless motor 2 in mechanical transmission connection with the hydraulic pump 1, a driver 3 in electric connection with the brushless motor, a set of intermediate relays 4 and a speed regulating signal source 6 in electric connection with the driver, and a set of external signal sources 5 in electric connection with the intermediate relays.
In the present embodiment, the set of intermediate relays 4 electrically connected to the driver includes a first start relay 401, a second start relay 402, a reverse relay 403, and a stop relay 404. A set of external signal sources 5 electrically connected to the intermediate relay 4 includes a valve opening start signal 501, a valve closing start signal 503, a valve closing signal 505, a stop signal 506, a forward limit signal 502, and a reverse limit signal 504; the valve opening starting signal 501 and the forward rotation limiting signal 502 are electrically connected with the first starting relay 401; the valve closing starting signal 503 and the reverse limiting signal 504 are connected with the second starting relay power supply 402; the stop signal 506 and the stop relay electrical connection 404; the valve closing signal 505 and the reverse relay electrical connection 403; the brushless motor is connected with the hydraulic pump through a coupler.
Because the control system of the low-torque electrohydraulic actuator adopts the hydraulic pump 1 which is communicated with the oil way of the low-torque electrohydraulic actuator, the brushless motor 2 which is in mechanical transmission connection with the hydraulic pump 1, the driver 3 which is electrically connected with the brushless motor 2, the group of intermediate relays 4 and the speed regulating signal source 6 which are electrically connected with the driver 3, and the group of external signal sources 5 which are electrically connected with the intermediate relays 4, the main components of the control system are the brushless motor 2, the driver 3 and the intermediate relays 4, the operation performance is simpler, more durable and the equipment cost and the after-sale maintenance cost are cheaper than those of the conventional electrohydraulic actuator in the market.
The working principle of the embodiment is as follows:
a low-torque electrohydraulic actuator: target action mechanism, load such as connecting valve, angular displacement scope: 0-90 degrees, valve opening range 0-90 degrees, valve closing range 90-0 degrees;
brushless motor 2: the power component, the brushless motor 2 connects the hydraulic pump 1, turn through the electrical machinery and provide power for whole set of electrohydraulic system, make the little torque electrohydraulic actuator act;
the driver 3: a main control unit for driving and controlling the rotation speed and steering of the brushless motor 2 through an internal circuit after receiving the operation signal;
intermediate relay 4: the circuit control element receives external signals and outputs the external signals to the driver through the structural characteristics of the element;
(1) The small-torque electro-hydraulic actuator performs valve opening action: according to fig. 1, an external signal source provides a valve opening start signal 501 and a forward rotation limit signal 502 to a first start relay 401, the first start relay 401 is conducted, a driver 3 receives the start signal and outputs a forward rotation instruction, and drives a brushless motor 2 to do forward rotation and simultaneously drives a hydraulic pump 1 to enable a small-torque electrohydraulic actuator to do valve opening. When the actuator reaches the full-open position of 90 degrees, the forward rotation limiting signal 502 disappears, the first starting relay 401 is disconnected, the driver 3 outputs a stop instruction, the brushless motor 2 stops rotating, and the valve is kept at the full-open position.
(2) The small-torque electro-hydraulic actuator performs valve closing action: the external signal source provides a valve closing start signal 502 and a reverse limit signal 503 to the second start relay 402, and the second start relay 402 is turned on; simultaneously, a valve closing signal 505 is given to the reversing relay 403, and the reversing relay 403 is conducted; the driver 3 receives the valve closing start signal 503 and the reverse rotation limit signal 504, outputs a reverse rotation instruction, drives the brushless motor 2 to reverse rotation, and drives the hydraulic pump 1 to enable the small-torque electro-hydraulic actuator to perform valve closing action. When the actuator reaches the fully closed position of 0 deg., the reverse rotation limit signal 504 disappears, the second start relay 402 is turned off, the driver 3 outputs a stop command, and the brushless motor 2 stops rotating, so that the valve is kept at the fully closed position.
(3) The small-torque electro-hydraulic actuator performs stopping action: the stop state means that the actuator is stopped at a specific angle after receiving a stop signal after reaching the specific angle in the rotating process. According to fig. 1, an external signal source provides a stop signal 506 to the stop relay 404, the stop relay 404 is turned on, the driver 3 receives the stop signal and outputs a stop command to drive the brushless motor 2 to stop rotating, so that the valve is kept at the current angle.
(4) The small-torque electrohydraulic actuator performs speed regulation action: the speed regulation state means that the rotating speed of the motor can be regulated in real time through a speed regulation signal source. In the valve opening/closing action process of the actuator, the speed regulating signal source 6 sends out an analog voltage signal which can be regulated by a regulating signal (DC 0-5V), the driver receives the voltage signal and outputs a speed regulating instruction to drive the brushless motor 2 to change the rotating speed, and the larger the voltage (upper limit DC 5V) is, the larger the motor rotating speed (upper limit is the rated motor rotating speed) is, and the faster the valve rotates.
While the technical content and features of the present utility model have been disclosed above, it will be understood that various changes and modifications to the above-described structure, including combinations of technical features individually disclosed or claimed herein, and other combinations of these features as apparent to those skilled in the art may be made under the inventive concept of the present utility model. Such variations and/or combinations fall within the technical field to which the utility model relates and fall within the scope of the claims of the utility model.
Claims (5)
1. The utility model provides a little moment of torsion electrohydraulic actuator control system, it includes the hydraulic pump that switches on with little moment of torsion electrohydraulic actuator oil circuit, its characterized in that: the device also comprises a brushless motor connected with the hydraulic pump in a mechanical transmission way, a driver electrically connected with the brushless motor, a group of intermediate relays and a speed regulation signal source which are electrically connected with the driver, and a group of external signal sources which are electrically connected with the intermediate relays.
2. The low torque electro-hydraulic actuator control system of claim 1, wherein the set of intermediate relays electrically connected to the driver includes a first start relay, a second start relay, a reverse relay, and a stop relay.
3. The low torque electro-hydraulic actuator control system of claim 2, wherein said set of external signal sources electrically connected to said intermediate relay includes a valve opening start signal, a valve closing signal, a stop signal, a forward limit signal, and a reverse limit signal.
4. The low torque electro-hydraulic actuator control system of claim 3, wherein the valve opening start signal and the forward limit signal are electrically connected to a first start relay; the valve closing starting signal and the reverse limiting signal are electrically connected with the second starting relay; the stop signal is electrically connected with the stop relay; the valve closing signal is electrically connected with the reversing relay.
5. The low torque electro-hydraulic actuator control system of claim 1, wherein said brushless motor is coupled to a hydraulic pump via a coupling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320359872.1U CN219576893U (en) | 2023-03-02 | 2023-03-02 | Control system of small-torque electrohydraulic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320359872.1U CN219576893U (en) | 2023-03-02 | 2023-03-02 | Control system of small-torque electrohydraulic actuator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219576893U true CN219576893U (en) | 2023-08-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320359872.1U Active CN219576893U (en) | 2023-03-02 | 2023-03-02 | Control system of small-torque electrohydraulic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219576893U (en) |
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2023
- 2023-03-02 CN CN202320359872.1U patent/CN219576893U/en active Active
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