Servo control system based on pump control hydraulic source

Abstract

The utility model discloses a servo control system based on a pump-controlled hydraulic source, which belongs to the technical field of hydraulic control and comprises a hydraulic console and a servo control system, and the servo control system consists of an upper computer and an electric control component. The electric control assembly is composed of a servo driver, a five-port switch, a switching power supply, a PLC, a circuit breaker, a small relay and a connector bar, and the PLC controls the small relay to be powered on through instructions so as to control servo enabling of the servo driver, so that the servo motor pump set is driven; and the rotating speed and the output pressure of the hydraulic oil pump are controlled by the servo motor pump set. Valve control type control is abandoned, a pump control servo control system is adopted, closed-loop control over flow and pressure of a hydraulic source is achieved, throttling loss and overflow loss of equipment in the working process are avoided, working energy consumption is greatly reduced, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control, and in particular relates to a servo control system based on a pump-controlled hydraulic source. Background Art

[0002] The hydraulic control system is powered by an electric motor, and uses a hydraulic pump to convert mechanical energy into pressure to push the hydraulic oil. By controlling each valve to change the flow direction of the hydraulic oil, the hydraulic cylinder is pushed to make different strokes and directions. Hydraulic control plays an irreplaceable role in industrial production.

[0003] In the hydraulic servo control system, when the flow and pressure of the hydraulic source oil pump need to change, the traditional adjustment method is to fix the flow of the hydraulic source pump station and adjust the pressure by manually changing the opening of the proportional valve. This situation often causes excessive flow to be wasted during the high-pressure and low-flow load-keeping use, causing the temperature of the entire hydraulic source to rise rapidly, which is not only a great waste of energy but also requires additional cooling and heat dissipation devices. Due to the working principle, the valve control system will inevitably have throttling loss and overflow loss, which leads to rapid temperature rise of the entire system, serious energy waste, and low efficiency. In addition, the valve-controlled pressure control system also has the disadvantages of complex structure and obvious noise.

[0004] Based on the problems in the above background technology, researchers have proposed a servo control system based on a pump-controlled hydraulic source. Utility Model Content

[0005] The utility model aims to provide a servo control system based on a pump-controlled hydraulic source to solve the problems of serious energy waste, the need for additional cooling and heat dissipation devices, complex structure, high noise and low working efficiency in traditional valve-controlled hydraulic systems.

[0006] In order to solve the above problems, the technical solution of the utility model is:

[0007] A servo control system based on a pump-controlled hydraulic source comprises a hydraulic control console and a servo control system, wherein the servo control system is composed of a host computer and an electronic control component; the electronic control component is composed of a servo driver, a five-port switch, a switching power supply, a PLC programmable controller, a circuit breaker, a small relay, and a terminal block; the PLC programmable controller commands control the small relays CJI and CJ2 to be energized and then control the servo driver to enable the servo, thereby driving a servo motor pump group, and the servo motor pump group controls the speed and output pressure of the hydraulic oil pump, thereby adjusting the overall oil supply flow and pressure of the hydraulic system.

[0008] Furthermore, a touch panel is provided on the top of the hydraulic control console.

[0009] Furthermore, the PLC programmable controller model is Siemens S7-200SMART.

[0010] Furthermore, a pressure sensor is provided at the oil outlet of the hydraulic control console, and the pressure sensor sends a feedback signal to the input module EM AE04 of the PLC programmable controller for PID adjustment. The EM AE04 module is connected to a temperature sensor, an axial pressure sensor, and a lateral pressure sensor.

[0011] Furthermore, the five-port switch is respectively connected to the host computer, PLC programmable controller, and touch panel to achieve information interconnection between the above devices.

[0012] Furthermore, two switching power supplies are provided, which are respectively connected to the input module EM AE08 and the output module EM AQ02 of the PLC programmable controller. The EM AE08 module is connected to each signal amplifier, each displacement sensor, and the body change sensor; the EM AQ02 module is connected to the axial servo valve and the lateral servo valve.

[0013] Furthermore, a circuit breaker is connected to the main bus to ensure safe operation of the servo control system.

[0014] The beneficial effects of the utility model are as follows:

[0015] (1) The utility model abandons valve-controlled control and adopts a pump-controlled servo control system to achieve closed-loop control of the flow and pressure of the hydraulic source, avoiding throttling loss and overflow loss of the equipment during operation, greatly reducing working energy consumption and saving energy.

[0016] (2) The utility model adopts a pump-controlled servo control system, which reduces noise during operation and solves the problem of rapid temperature rise of the system, thereby eliminating the need for additional cooling and heat dissipation devices for the hydraulic source.

[0017] (3) The utility model adopts a five-port switch to connect the PLC, host computer, and touch screen to realize information interconnection, completes the real-time monitoring and control of the working status and performance parameters of the hydraulic system, improves the working efficiency of the equipment, optimizes the equipment structure, and makes the operation of technicians more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a left view of the structure of the utility model.

[0020] Figure 3 It is a top view of the structure of the utility model.

[0021] Figure 4 This is a diagram of the electronic control components of the servo control system of the utility model.

[0022] Figure 5 This is the electrical wiring diagram of the utility model.

[0023] The reference numerals are as follows: 101, hydraulic control console; 102, servo control system; 201, host computer; 202, electronic control component; 203, servo driver; 204, five-port switch; 205, switching power supply; 206, PLC programmable controller; 207, circuit breaker; 208, small relay; 209, terminal block; 301, touch panel. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiment of the utility model will be described below in conjunction with the drawings in the embodiment of the utility model. It is understood that the specific embodiments described herein are only used to explain the utility model, rather than to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a servo control system based on a pump-controlled hydraulic source includes a hydraulic control console 101 and a servo control system 102 . The servo control system 102 is composed of a host computer 201 and an electronic control component 202 . A touch panel 301 is provided on the top of the hydraulic control console 101 .

[0026] like Figure 4 , Figure 5The electronic control assembly 202 shown is composed of a servo driver 203, a five-port switch 204, a switching power supply 205, a PLC programmable controller 206, a circuit breaker 207, a small relay 208, and a terminal block 209; the PLC programmable controller 206 is a Siemens S7-200SMART; a pressure sensor is provided at the oil outlet of the hydraulic control console 101, and the pressure sensor sends a feedback signal to the input module EM AE04 of the PLC programmable controller 206 for PID adjustment. The AE04 module is connected to the temperature sensor, the axial pressure sensor, and the lateral pressure sensor; the PLC programmable controller 206 instructs the small relays 208CJI and CJ2 to be energized and then controls the servo driver 203 to enable the servo, thereby driving the servo motor pump group, which controls the speed and output pressure of the hydraulic oil pump to adjust the overall oil supply flow and pressure of the hydraulic system; the five-port switch 204 is respectively connected to the host computer 201, the PLC programmable controller 206, and the touch panel 301 to achieve information interconnection between the above devices; there are two switching power supplies 205, which are respectively connected to the input module EM AE08 and the output module EM AQ02 of the PLC programmable controller 206, and the EM AE08 module is connected to each signal amplifier, each displacement sensor, and body change sensor; the EM AQ02 module is connected to the axial servo valve and the lateral servo valve; the circuit breaker 207 is connected to the main bus to ensure the safe operation of the servo control system.

[0027] In the specific operation process: the system flow is automatically adjusted by sending a pulse signal to the servo driver 203 through the PLC programmable controller 206, and the servo driver 203 controls the servo motor oil pump group to adjust the motor frequency and the proportional relief valve to meet the requirements of the cylinder for loading load.

[0028] The automatic regulation of system pressure is to adjust the servo motor oil pump group by sending instructions to the servo driver 203CN3 input / output interface through the PLC programmable controller 206. The pressure signal of the outlet is converted into a standard signal of 0-10V through the pressure sensor installed at the oil outlet of the hydraulic control console 101 and sent to the input module EM AE04 of the PLC programmable controller 206 for PID regulation. After operation and comparison with the given pressure parameter, the adjustment parameter is obtained and transmitted to the servo controller 203, and then fed back to the servo motor pump group through the servo controller 203. The servo motor pump group controls the speed and pressure of the oil pump to keep the pressure and flow in the system at the given value. When the upper computer 201 instructs to change the cylinder loading speed, according to the cylinder loading speed value and output value, the PLC programmable controller 206 controls the servo controller 203 to feed back to the servo motor pump group, so that the pump group speed increases or decreases, and the system flow and pressure are automatically regulated. When the cylinder load and speed change, the control pulse speed frequency of the input servo motor also changes accordingly, thus forming a closed-loop system based on the set pressure, and realizing the servo precision control of the pump-controlled hydraulic source.

Claims

1. A servo control system based on a pump-controlled hydraulic source, comprising a hydraulic control console (101) and a servo control system (102), characterized in that: The servo control system (102) is composed of a host computer (201) and an electric control component (202); the electric control component (202) is composed of a servo driver (203), a five-port switch (204), a switching power supply (205), a PLC programmable controller (206), a circuit breaker (207), a small relay (208), and a terminal block (209); the PLC programmable controller (206) controls the small relays (208) CJ1 and CJ2 to be energized and then controls the servo driver (203) to enable the servo, thereby driving the servo motor pump group, and the servo motor pump group controls the speed and output pressure of the hydraulic oil pump.

2. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: A touch panel (301) is provided on the top of the hydraulic control console (101).

3. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: The PLC programmable controller (206) is of Siemens S7-200SMART model.

4. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: A pressure sensor is provided at the oil outlet of the hydraulic control console (101), and the pressure sensor sends a feedback signal to an input module EM AE04 of a PLC programmable controller (206) for PID regulation; the EM AE04 module is connected to a temperature sensor, an axial pressure sensor, and a lateral pressure sensor.

5. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: The five-port switch (204) is respectively connected to the host computer (201), the PLC programmable controller (206), and the touch panel (301) to achieve information interconnection between the above devices.

6. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: The switch power supplies (205) are provided with two, which are respectively connected to the input module EM AE08 and the output module EMAQ02 of the PLC programmable controller (206); the EM AE08 module is connected to each signal amplifier, each displacement sensor, and the body change sensor; the EMAQ02 module is connected to the axial servo valve and the lateral servo valve.

7. A servo control system based on a pump-controlled hydraulic source as claimed in claim 1, characterized in that: The circuit breaker (207) is connected to the main busbar.

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