CN211202465U

CN211202465U - Digital servo valve with displacement feedback

Info

Publication number: CN211202465U
Application number: CN201922346396.6U
Authority: CN
Inventors: 李成军; 孙宇; 陈高松
Original assignee: Hangzhou Singo Technology Co ltd
Current assignee: Hangzhou Singo Technology Co ltd
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2020-08-07
Anticipated expiration: 2029-12-24

Abstract

The utility model provides a take displacement feedback's digital servo valve, including valve body and step motor, be equipped with the case in the valve body, the case links to each other with step motor, step motor is equipped with the encoder, last fixed amplifier shell of step motor, the amplifier shell is equipped with the apron, and fixed control board, driver board on the apron, controller board link to each other with the driver board, and the driver board links to each other with step motor, and the encoder links to each other with the control panel. The utility model has the advantages that: and a feedback mechanism is introduced, so that the volume is reduced, and the safety and the reliability are realized.

Description

Digital servo valve with displacement feedback

Technical Field

The utility model relates to the technical field of motors, concretely relates to take digital servo valve of displacement feedback.

Background

A conventional digital valve is an open loop actuator comprising a digital valve, a stepper driver and a stepper motor. The working principle of the conventional digital valve is as follows: the controller sends a pulse to the stepping driver, the stepping driver controls the stepping motor to rotate forward and backward, and the stepping motor drives the digital valve to move forward and backward.

The work engineering of traditional digital valve does not introduce feedback mechanism, and if step motor appears overheated, loses step scheduling problem, will lead to the control out of control, is fairly dangerous.

Disclosure of Invention

The utility model aims at providing a introduce feedback mechanism, reduce volume, safe and reliable's digital servo valve of taking displacement feedback.

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes:

the utility model provides a take displacement feedback's digital servo valve, includes valve body and step motor, is equipped with the case in the valve body, and the case links to each other with step motor, step motor is equipped with the encoder, the last amplifier shell of fixing of step motor, the amplifier shell is equipped with the apron, fixes control panel, driver board on the apron, and controller board links to each other with the driver board, and the driver board links to each other with step motor, and the encoder links to each other with the control panel.

Furthermore, a valve core connector is arranged on a valve core in the valve body, a motor connector is arranged on the stepping motor, and the valve core connector is connected with the motor connector through a sliding key.

Furthermore, a valve sleeve is arranged between the valve body and the valve core, and the valve body and the shell of the stepping motor are connected through a coupling connecting flange and a motor connecting flange in sequence.

Furthermore, an XS aviation plug and an indicator lamp plate are fixed on the amplifier shell, and the XS aviation plug is externally connected.

Compared with the prior art, the utility model, have following advantage:

the utility model relates to a take digital servo valve of displacement feedback introduces the feedback mechanism, supports the encoder to gather the displacement and does closed loop position control, has solved step motor and has lost the step problem, and encoder, driver can also provide warning output, guarantee system security, reliability; the volume is reduced, the control part, the driving part and the encoder are integrated in the whole system, the structure of the servo valve is optimized, and the cost is lower than that of an external driver; one controller can control a plurality of paths of servo valves at the same time, and a plurality of digital valves are used in a cascading way, so that the expansibility is improved; the communication distance CAN be prolonged to hundreds of meters, the method CAN be applied to the situation that a construction site is huge, and various communication modes such as CAN, RS232, RS485, analog output and the like are supported; the servo valve body has the characteristics of impact resistance, high temperature resistance, oil stain resistance and better anti-interference effect, and is particularly suitable for severe environments of industrial fields.

Drawings

Fig. 1 is a schematic communication diagram of a digital servo valve with displacement feedback according to the present invention;

fig. 2 is a schematic structural state diagram (one) of a digital servo valve with displacement feedback according to the present invention;

fig. 3 is a schematic structural state diagram (ii) of a digital servo valve with displacement feedback according to the present invention;

fig. 4 is a schematic structural state diagram (iii) of the digital servo valve with displacement feedback according to the present invention.

Detailed Description

Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

As shown in fig. 2 to 4, the digital servo valve with displacement feedback includes a valve body 1 and a stepping motor 11, a valve core 3 is arranged in the valve body 1, the valve core 3 is connected with the stepping motor 11 through an intermediate component, the stepping motor 11 is provided with an encoder 16, an amplifier housing 12 is fixed on the stepping motor 11, the amplifier housing 12 is provided with a cover plate 13, a control board 17 and a driver board 18 are fixed on the cover plate 13, an XS aviation plug 14 and an indicator lamp board 15 are fixed on the amplifier housing 12, the controller board 17 is in communication connection with the driver board 18, the driver board 18 is in communication connection with the stepping motor 11, the encoder 16 is in communication connection with the control board 17, the XS aviation plug 14 is externally connected with XS16-6 and XS 16-6. A valve sleeve 2 is arranged between the valve body 1 and the valve core 3, the valve body 1 and the shell of the stepping motor 11 are sequentially connected through a coupling connecting flange 4 and a motor connecting flange 5, and a rear cover 6 is arranged at the end part of the valve body 1. The valve core 3 in the valve body 1 is provided with a valve core connector 7, the stepping motor 11 is provided with a motor connector 5, the valve core connector 7 and the motor connector 8 are both arranged in a bearing coupling flange 4, and the valve core connector 7 is connected with the motor connector 8 through a sliding key 10. One section of the valve core 3 is provided with a double thread sleeve 9.

As shown in fig. 1, the control board 17 can send a pulse to the driver board 18, the driver board 18 can drive the stepping motor 11 to rotate forward and backward, the encoder 16 is fixed on the shaft of the stepping motor 11, the encoder 16 can feed back the position of the stepping motor 11 to the control board 17, and the external controller can send a position command to the control board 17. The external controller can control the multi-channel digital servo valve at the same time. The controller is connected with each digital servo valve through a communication line, and the digital servo valve can be controlled to move only by sending a command to the digital servo valve with the corresponding ID number. The communication mode CAN adopt CAN, RS232, RS485 or analog quantity output mode.

Specifically, after receiving a position command sent by the controller, the control board 17 sends a specified number of pulses to the driver board 18, the driver board 18 controls the stepping motor 11 to rotate by a certain angle in a certain direction, the encoder 16 fixed on the shaft of the stepping motor 11 feeds back the current position to the control board 17, the control board 17 sends the position and the encoder 16 feeds back the position by comparing the controller in real time, if the position and the encoder position are not consistent, the control board 17 sends the pulses to the driver board 18, and the stepping motor 11 is driven to rotate until the position and the encoder position are consistent. This ensures that the position of the digital servo valve is always accurate. Besides, the encoder 16 feeds back the operation abnormality information of the stepping motor 11; if the stepping motor 11 generates heat, and the current is too large, the encoder 16 can feed back to the control board 17 in a communication mode.

As shown in fig. 2, the valve core 3 is in a reset state, at this time, the oil in the chamber P is not communicated, and the oil in the chamber a flows to the chamber T. As shown in fig. 3, the valve core 3 is in a neutral position state, the cavity a is not communicated with the cavity P and the cavity T, and the oil cylinder is positioned; if it is desired to establish the A-chamber pressure, this is done stepwise by sending digital commands. As shown in fig. 4, after the valve core 3 continues to move, the valve core 3 further adjusts the displacement through a digital command, at this time, P → T is closed, and at this time, the purpose is to establish the system pressure; the digital instruction is sent by an upper computer (controller) and drives a stepping motor 11 on the valve, the stepping motor 11 drives a motor connector 8, and the motor connector 8 drives a valve core connector 7 through a sliding key 10 so as to drive the digital movement amount of the valve core 3; because the valve core connector 7 is connected with the valve core 3, the torque is transmitted to the valve core 3, the movement amount of the valve core 3 determines the function realized by the valve core 3, and the displacement control is very accurate; the relationship between the movement amount of the valve core 3 and the rotating speed and the pressure of the oil pump is precisely linked, the relationship amount of the valve core 3 and the rotating speed and the pressure of the oil pump is that when the instruction is gradually increased, the system pressure of the P cavity and the A cavity is gradually increased, the highest pressure of the system can reach 63MPA, and the whole system only needs conventional illumination voltage (22V). Therefore, the utility model discloses a digital valve is arranged in energy-conserving and the environmental protection of hydraulic system.

The utility model discloses a digital servo valve, the appearance is meticulous pleasing to the eye, and shared space volume is little, and spare part installation is changed conveniently, has the anti-impact and hits, high temperature resistant, grease proofing dirt characteristic. The inside and outside carbon steel or stainless steel material that all adopt high strength of valve body, amplifier shell adopt high strength ABS material, and control panel and step driver board configuration fin, whole servo valve radiating effect is good, and each part junction leakproofness is good, the oil leak phenomenon can not appear. The utility model discloses digital servo valve introduces the feedback mechanism, and control is accurate, and is respond well.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the concept of the present invention, and these improvements and decorations should also be considered as the protection scope of the present invention.

Claims

1. The utility model provides a take displacement feedback's digital servo valve, includes valve body and step motor, is equipped with the case in the valve body, and the case links to each other its characterized in that with step motor: the stepping motor is provided with an encoder, an amplifier shell is fixed on the stepping motor, the amplifier shell is provided with a cover plate, a control board and a driver board are fixed on the cover plate, the controller board is connected with the driver board, the driver board is connected with the stepping motor, and the encoder is connected with the control board.

2. The digital servo valve with displacement feedback of claim 1, wherein: and a valve core connector is arranged on a valve core in the valve body, a motor connector is arranged on the stepping motor, and the valve core connector is connected with the motor connector through a sliding key.

3. The digital servo valve with displacement feedback of claim 2, wherein: and a valve sleeve is arranged between the valve body and the valve core, and the valve body and the shell of the stepping motor are connected through a coupling connecting flange and a motor connecting flange in sequence.

4. The digital servo valve with displacement feedback of claim 1, wherein: and an XS aviation plug and an indicator lamp plate are fixed on the amplifier shell, and the XS aviation plug is externally connected.