Electrohydraulic servo mechanism running-in system

Abstract

The invention discloses a running-in system of an electro-hydraulic servo mechanism. The running-in system comprises an energy table, an oil filter system and a running-in signal table, the energy table comprises a plurality of groups of running-in assemblies, and the input end and the output end of each group of running-in assembly are respectively connected with the output end and the input end of the oil filter system; the oil filter system is used for filtering hydraulic oil and inputting the hydraulic oil into the running-in assembly, and the hydraulic oil reaches the interior of the electro-hydraulic servo mechanism through the oil way switching tool and provides high-pressure energy for the electro-hydraulic servo mechanism. The running-in assembly comprises an oil pump, a valve group, a workpiece mounting position and a pressure adjusting device; the pressure adjusting device is used for adjusting inlet pressure and outlet pressure of the workpiece mounting position; the running-in signal station is used for receiving a first feedback signal of the electro-hydraulic servo mechanism and a position signal collected through a process potentiometer, comparing and amplifying the first feedback signal and the position signal to output a first control signal, and sending the first control signal to a process servo valve through a running-in cable.

Description

Technical Field

[0001] The invention belongs to the technical field of electro-hydraulic servo mechanism, and in particular relates to an electro-hydraulic servo mechanism running-in system. Background Art

[0002] The structure of the electro-hydraulic servo mechanism can be divided into four parts: energy part, actuator, control mechanism and power amplifier combination. Due to its structural characteristics, special working principle and extremely high requirements for the cleanliness of its internal working environment, when the electro-hydraulic servo mechanism is powered on, there will often be problems such as abnormal jitter during performance test small signal and dynamic frequency sweep, blockage of excess objects in the working oil circuit, resulting in inaction and whistling of the electro-hydraulic servo valve. Summary of the invention

[0003] An object of the present invention is to provide an electro-hydraulic servo mechanism running-in system, which can solve the technical problem of electro-hydraulic servo valve whistling in the prior art.

[0004] According to a first aspect of the present invention, there is provided an electro-hydraulic servo mechanism running-in system, comprising an energy station, an oil filter system, and a running-in signal station;

[0005] The energy station includes a plurality of groups of running-in components, and the input end and the output end of each group of running-in components are respectively connected to the output end and the input end of the oil filter system;

[0006] The oil filter system is used to filter the hydraulic oil and input the hydraulic oil into the running-in assembly. The hydraulic oil reaches the inside of the electro-hydraulic servo mechanism through the oil circuit adapter, providing high-pressure energy to the electro-hydraulic servo mechanism.

[0007] The running-in components include an oil pump, a valve group, a workpiece mounting position, and a pressure regulating device;

[0008] The workpiece mounting position is used to install the electro-hydraulic servo mechanism, and the oil pump is used to transmit the hydraulic oil output by the oil filter system to the electro-hydraulic servo mechanism;

[0009] The pressure regulating device is used to adjust the inlet pressure and outlet pressure of the workpiece installation position;

[0010] The running-in signal station is used to receive the first feedback signal of the electro-hydraulic servo mechanism and the position signal collected by the process potentiometer, compare and amplify the first feedback signal and the position signal to output a first control signal, and send the first control signal to the process servo valve through the running-in cable, thereby controlling the action component of the electro-hydraulic servo structure to perform reciprocating motion, so that the high-pressure oil flows inside the electro-hydraulic servo mechanism to flush the internal oil circuit.

[0011] Optionally, it also includes a control circuit, which is used to obtain a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, a second control signal corresponding to the pressure adjustment target, and a coil low-end signal of the pressure regulating device, and output a coil high-end signal to the pressure regulating device based on the second feedback signal, the second control signal, and the coil low-end signal, so as to control the pressure regulating device to adjust the inlet pressure or the outlet pressure according to the pressure adjustment target.

[0012] Optionally, the control circuit includes: a comparison module, a control signal input module, a coil high-end signal output module, and a coil low-end signal input module;

[0013] The control signal input module is connected to the control signal input terminal and is used to receive a second control signal corresponding to a pressure adjustment target, wherein the pressure adjustment target includes an inlet pressure or an outlet pressure of the workpiece;

[0014] The comparison module is connected to the control signal input module and the feedback signal input terminal, and is used to receive a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, compare and amplify the second feedback signal with the second control signal, and output an amplified signal;

[0015] The coil low-end signal input module is connected to the coil high-end signal output module, and the coil low-end signal input module is used to send the coil low-end signal to the coil high-end signal output module;

[0016] The coil high-end signal output module is connected to the comparison module, and is used to receive the amplified signal, and output a corresponding coil high-end signal according to the amplified signal and the coil low-end signal to adjust the inlet pressure or outlet pressure of the workpiece.

[0017] Optionally, the comparison module includes a first comparison module, a second comparison module, a third comparison module and a fourth comparison module;

[0018] The control signal input module includes a first input module, a second input module, a third input module and a fourth input module;

[0019] The input end of the first comparison module is connected to the feedback signal input end, the output end of the first comparison module is connected to the input end of the second comparison module, the first end of the first input module is connected to the control signal input end, and the second end of the first input module is connected to the input end of the second comparison module and the first end of the second input module respectively;

[0020] The output end of the second comparison module is connected to the input end of the third comparison module, and the second end of the second input module is connected to the input end of the third comparison module and the first end of the third input module respectively;

[0021] The output end of the third comparison module is connected to the input end of the fourth comparison module, and the second end of the third input module is connected to the input end of the fourth comparison module and the first end of the fourth input module respectively;

[0022] The second end of the fourth input module is connected to the output end of the fourth comparison module, and the output end of the fourth comparison module is connected to the coil high-end signal output module.

[0023] Optionally, the first input module includes a second resistor, and the first comparison module includes a first comparator, a first resistor, a third resistor, a sixth resistor, and a first capacitor;

[0024] The positive input terminal of the first comparator is connected to the first terminal of the first resistor and the feedback signal input terminal respectively, the second terminal of the first resistor is grounded, and the negative input terminal of the first comparator is connected to the output terminal of the first comparator;

[0025] The output end of the first comparator is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the sixth resistor and the first end of the first capacitor respectively, the second end of the first capacitor is connected to the second end of the sixth resistor, and the second end of the sixth resistor is connected to the second comparison module;

[0026] The first end of the second resistor is connected to the control signal input end, and the second end of the second resistor is connected to the second input module and the second end of the first capacitor respectively.

[0027] Optionally, the second input module includes a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor, and the second comparison module includes a second comparator and a seventh resistor;

[0028] The negative input terminal of the second comparator is connected to the second terminal of the sixth resistor, the positive input terminal of the second comparator is connected to the first terminal of the seventh resistor, the second terminal of the seventh resistor is grounded, and the output terminal of the second comparator is connected to the third comparison module;

[0029] The first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the second capacitor and the first end of the third capacitor, the second end of the fifth resistor is respectively connected to the third input module and the second end of the second capacitor, the second end of the second capacitor is connected to the second end of the third capacitor, and the second end of the third capacitor is connected to the output end of the second comparator.

[0030] Optionally, the third input module includes a thirteenth resistor, and the third comparison module includes a third comparator, a fourth capacitor, a fifth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a fourteenth resistor;

[0031] The first end of the ninth resistor is connected to the output end of the second comparator, the second end of the ninth resistor is respectively connected to the first end of the fourth capacitor, the first end of the fifth capacitor, and the first end of the tenth resistor, the second end of the fourth capacitor is connected to the second end of the eleventh resistor, the second end of the fifth capacitor is connected to the negative input end of the third comparator, the first end of the eleventh resistor is connected to the negative input end of the third comparator, the second end of the eleventh resistor is connected to the output end of the third comparator, the positive input end of the third comparator is connected to the first end of the twelfth resistor, the second end of the twelfth resistor and the second end of the tenth resistor are grounded, the output end of the third comparator is connected to the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected to the fourth comparison module;

[0032] The first end of the thirteenth resistor is connected to the second end of the fifth resistor, and the second end of the thirteenth resistor is connected to the second end of the fourteenth resistor and the fourth input module respectively.

[0033] Optionally, the fourth input module includes a sixteenth resistor, and the fourth comparison module includes a fourth comparator, a fifteenth resistor, and a seventeenth resistor;

[0034] The first end of the sixteenth resistor is connected to the second end of the thirteenth resistor, and the second end of the sixteenth resistor is connected to the output end of the fourth comparator;

[0035] The negative input terminal of the fourth comparator is connected to the second end of the fourteenth resistor, the positive input terminal of the fourth comparator is connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is grounded, the output terminal of the fourth comparator is connected to the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected to the coil high-end signal output module.

[0036] Optionally, the coil low-end signal input module includes an eighth resistor, a nineteenth resistor, and a sixth capacitor;

[0037] A first end of the eighth resistor is connected to the low-end signal input end of the coil, and a second end of the eighth resistor is grounded;

[0038] The first end of the nineteenth resistor is connected to the first end of the eighth resistor and the first end of the sixth capacitor respectively, the second end of the sixth capacitor is connected to the second end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the second end of the seventeenth resistor.

[0039] Optionally, the coil high-end signal output module includes a single chip microcomputer, an eighteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first diode, and a second diode;

[0040] Pin 5 of the single-chip microcomputer is connected to the second end of the seventeenth resistor, pin 6 of the single-chip microcomputer is connected to the first end of the eighteenth resistor, pin 7 of the single-chip microcomputer is connected to the first end of the twenty-second resistor, the second end of the twenty-second resistor is respectively connected to the first end of the ninth capacitor and the -15V power supply, and the second end of the eighteenth resistor and the second end of the ninth capacitor are grounded;

[0041] Pin 10 of the single-chip microcomputer is connected to a -15V power supply, pin 8 of the single-chip microcomputer is connected to a first end of a 23rd resistor, a second end of the 23rd resistor is connected to a -15V power supply, pin 9 of the single-chip microcomputer is connected to a first end of a 20th resistor, a second end of the 20th resistor is respectively connected to a second end of the 23rd resistor and a positive electrode of the second diode, a negative electrode of the second diode is connected to pin 11 of the single-chip microcomputer, and pin 11 of the single-chip microcomputer is used to output a high-end signal of the coil;

[0042] Pin 12 of the single-chip microcomputer is connected to a +15V power supply and a first end of the eighth capacitor, the second end of the eighth capacitor is grounded, pin 1 of the single-chip microcomputer is connected to a first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to a +15V power supply, pin 2 of the single-chip microcomputer is connected to a first end of the seventh capacitor, the second end of the seventh capacitor is respectively connected to pin 11 of the single-chip microcomputer and the positive electrode of the first diode, and the negative electrode of the first diode is connected to the second end of the twenty-first resistor.

[0043] The beneficial effects of the present invention are as follows: the new electro-hydraulic servo mechanism running-in equipment has evolved from the original independent running-in pump station to a multi-channel integrated running-in system, which can support up to eight electro-hydraulic servo mechanisms to be run-in at the same time. In addition, with the configuration of the cooling system, the running-in equipment can work for a long time, greatly improving the running-in efficiency while reducing the investment in human resources.

[0044] The integrated concept and oil circuit design, as well as the digital display visual operation control center, are simple and convenient to operate and can be controlled autonomously, reducing labor intensity. The running-in operation process is fully monitored to detect and deal with problems immediately, ensuring the reliability and safety of the running-in. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural principle diagram of the running-in system of the electro-hydraulic servo mechanism of the present invention.

[0046] Figure 2 It is a control circuit schematic diagram of the electro-hydraulic servo mechanism running-in system of the present invention. DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0049] The techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and devices should be considered as part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0050] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0051] In the specification and claims of the present invention, if the term "first" or "second" is involved, it may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the related objects are in an "or" relationship.

[0052] The structure of the electro-hydraulic servo mechanism can be divided into four parts: energy part, actuator, control mechanism and power amplifier combination. Due to its structural characteristics, special working principle and high requirements for the cleanliness of its internal working environment, when the electro-hydraulic servo mechanism is powered on, there will often be problems such as abnormal jitter during performance test small signal and dynamic frequency sweep, blockage of excess objects in the working oil circuit, resulting in inaction and whistling of the electro-hydraulic servo valve.

[0053] For this purpose, a “running-in” procedure is added to the process. Before formal assembly, the electro-hydraulic servo mechanism is connected to high-pressure oil to flush its internal oil pipelines, pushing the operating mechanism to perform reciprocating motion, simulating the working state of the electro-hydraulic servo mechanism, so as to achieve the process method of generating excess materials in advance and then cleaning and removing the excess materials.

[0054] At present, the flushing oil circuit equipment uses a running-in pump station as the energy supply equipment. With the increase in the types and quantity of electro-hydraulic servo mechanism production, the main technical problems in the running-in process of the electro-hydraulic servo mechanism are: 1. The running-in pump station is a single independent unit and can only be run-in one by one, with low running-in efficiency; 2. It has poor versatility and cannot adapt to running-in of multiple models and different scenarios; 3. It has poor controllability and safety.

[0055] At present, the running-in energy supply equipment is a relatively primitive running-in pump station, which is an independent single device. It can only perform the running-in process of the electro-hydraulic servo mechanism one-on-one, and the integration is poor. In addition, the running-in pump station is prone to heat during operation and cannot operate continuously for a long time. It can only support the running-in of three electro-hydraulic servo mechanisms at most every day, and the efficiency is extremely low. During the running-in, disassembly and assembly are frequent, and the labor force is large, requiring a large amount of human resource costs.

[0056] The running-in pump station did not have a feedback command signal station. For different types of electro-hydraulic servo mechanisms, only a single-state action command could be issued. It could not adapt to the running-in of multiple models, with low adaptability and poor processability. The operation process did not have a visual digital display control terminal. When a fault occurred, only the start-stop switch could be terminated. The running-in process could not be effectively controlled, and the reliability and safety were low.

[0057] like Figure 1 As shown, this embodiment introduces an electro-hydraulic servo mechanism running-in system, including an energy station, an oil filter system, and a running-in signal station.

[0058] The energy station includes a plurality of groups of running-in components, and the input end and the output end of each group of running-in components are respectively connected to the output end and the input end of the oil filter system.

[0059] The oil filter system is used to filter the hydraulic oil and input the hydraulic oil into the running-in components. The hydraulic oil reaches the inside of the electro-hydraulic servo mechanism through the oil circuit adapter, providing high-pressure energy to the electro-hydraulic servo mechanism.

[0060] The running-in components include an oil pump, a valve group, a workpiece mounting position, and a pressure regulating device.

[0061] The workpiece mounting position is used to install the electro-hydraulic servo mechanism, and the oil pump is used to transmit the hydraulic oil output by the oil filter system to the electro-hydraulic servo mechanism.

[0062] The pressure regulating device is used to adjust the inlet pressure and outlet pressure of the workpiece installation position.

[0063] The running-in signal station is used to receive the first feedback signal of the electro-hydraulic servo mechanism and the position signal collected by the process potentiometer, compare and amplify the first feedback signal and the position signal to output a first control signal, and send the first control signal to the process servo valve through the running-in cable, thereby controlling the action component of the electro-hydraulic servo structure to perform reciprocating motion, so that the high-pressure oil flows inside the electro-hydraulic servo mechanism to flush the internal oil circuit.

[0064] like Figure 1 As shown, the oil filter system includes an oil tank, a filter pump, a valve group, and a cooler. The hydraulic oil in the oil tank A passes through valve 1 and enters the oil pump A, and the hydraulic oil is transmitted to the workpiece position in the pipeline through the oil pump A. Figure 1 The workpiece position in the figure is the position of the electro-hydraulic servo mechanism. When the electro-hydraulic servo mechanism needs to be run-in, the electro-hydraulic servo mechanism is installed at the workpiece position.

[0065] The user can set the inlet pressure and outlet pressure in the operation interface of the running-in system. The pressure regulating device adjusts according to the inlet pressure and outlet pressure set by the user, and can adapt to a variety of different models of electro-hydraulic servo mechanisms.

[0066] The electro-hydraulic servo mechanism running-in system of the present invention includes four sets of running-in components, which work independently without affecting each other. The oil inlet and outlet of each station can be divided into two streams, so the system can run-in up to 8 electro-hydraulic servo mechanisms at the same time. During the running-in, the operating status of each component can be digitally displayed on the operating terminal, so that the running-in process can be autonomously controlled, and reliability and safety can be guaranteed.

[0067] In this embodiment, a control circuit is also included, which is used to obtain a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, a second control signal corresponding to the pressure adjustment target, and a coil low-end signal of the pressure regulating device, and output a coil high-end signal to the pressure regulating device based on the second feedback signal, the second control signal, and the coil low-end signal to control the pressure regulating device to adjust the inlet pressure or the outlet pressure according to the pressure adjustment target.

[0068] like Figure 2 As shown, the electro-hydraulic servo mechanism running-in system includes four control circuits, each of which corresponds to a station of the running-in system. The four control circuits adopt the same circuit structure design.

[0069] The coil is a coil of a pressure regulating device. The real-time state of the running-in system is reflected by the second feedback signal, and the real-time state of the running-in system is considered when calculating the high-end signal of the coil, so that the pressure control is more accurate.

[0070] In this embodiment, the control circuit includes: a comparison module, a control signal input module, a coil high-end signal output module, and a coil low-end signal input module;

[0071] The control signal input module is connected to the control signal input terminal and is used to receive a second control signal corresponding to a pressure adjustment target, wherein the pressure adjustment target includes an inlet pressure or an outlet pressure of the workpiece;

[0072] The comparison module is connected to the control signal input module and the feedback signal input terminal, and is used to receive a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, compare and amplify the second feedback signal with the second control signal, and output an amplified signal;

[0073] The coil low-end signal input module is connected to the coil high-end signal output module, and the coil low-end signal input module is used to send the coil low-end signal to the coil high-end signal output module;

[0074] The coil high-end signal output module is connected to the comparison module, and is used to receive the amplified signal, and output a corresponding coil high-end signal according to the amplified signal and the coil low-end signal to adjust the inlet pressure or outlet pressure of the workpiece.

[0075] After the user sets the inlet pressure and outlet pressure in the operation interface of the running-in system, a second control signal corresponding to the pressure adjustment target is automatically generated. The comparison module receives the second control signal and a second feedback signal indicating the current state of the running-in system, and outputs an amplified signal based on the second feedback signal and the second control signal.

[0076] Then, the coil high-end signal output module outputs the coil high-end signal according to the amplified signal and the coil low-end signal, thereby controlling the pressure regulating device to adjust the inlet pressure and the outlet pressure.

[0077] In this embodiment, the comparison module includes a first comparison module, a second comparison module, a third comparison module and a fourth comparison module;

[0078] The control signal input module includes a first input module, a second input module, a third input module and a fourth input module;

[0079] The input end of the first comparison module is connected to the feedback signal input end, the output end of the first comparison module is connected to the input end of the second comparison module, the first end of the first input module is connected to the control signal input end, and the second end of the first input module is connected to the input end of the second comparison module and the first end of the second input module respectively;

[0080] The output end of the second comparison module is connected to the input end of the third comparison module, and the second end of the second input module is connected to the input end of the third comparison module and the first end of the third input module respectively;

[0081] The output end of the third comparison module is connected to the input end of the fourth comparison module, and the second end of the third input module is connected to the input end of the fourth comparison module and the first end of the fourth input module respectively;

[0082] The second end of the fourth input module is connected to the output end of the fourth comparison module, and the output end of the fourth comparison module is connected to the coil high-end signal output module.

[0083] The second control signal is transmitted to the first comparison module, the second comparison module, the third comparison module and the fourth comparison module respectively after passing through the control signal input module.

[0084] The first comparison module is used for receiving the second feedback signal, amplifying the second feedback signal, and outputting the amplification result to the second comparison module.

[0085] The second control signal is sent to the second comparison module after passing through the first input module. The second comparison module compares and amplifies the second control signal passing through the first input module and the amplification result output by the first comparison module, and outputs the amplification result to the third comparison module.

[0086] The second control signal passes through the first input module and the second input module in sequence and is sent to the third comparison module. The third comparison module compares and amplifies the second control signal passing through the first input module and the second input module and the amplification result output by the second comparison module, and outputs the amplification result to the fourth comparison module.

[0087] The fourth comparison module amplifies the amplification result output by the third comparison module, and finally outputs the amplified signal to the coil high-end signal output module.

[0088] The present invention adopts a multi-stage comparison amplification circuit to perform multi-stage comparison amplification on the second control signal and the second feedback signal, thereby improving the accuracy of the amplified signal.

[0089] In this embodiment, the first input module includes a second resistor, and the first comparison module includes a first comparator, a first resistor, a third resistor, a sixth resistor, and a first capacitor;

[0090] The positive input terminal of the first comparator is connected to the first terminal of the first resistor and the feedback signal input terminal respectively, the second terminal of the first resistor is grounded, and the negative input terminal of the first comparator is connected to the output terminal of the first comparator;

[0091] The output end of the first comparator is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the sixth resistor and the first end of the first capacitor respectively, the second end of the first capacitor is connected to the second end of the sixth resistor, and the second end of the sixth resistor is connected to the second comparison module;

[0092] The first end of the second resistor is connected to the control signal input end, and the second end of the second resistor is connected to the second input module and the second end of the first capacitor respectively.

[0093] In this embodiment, the second input module includes a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor, and the second comparison module includes a second comparator and a seventh resistor;

[0094] The negative input terminal of the second comparator is connected to the second terminal of the sixth resistor, the positive input terminal of the second comparator is connected to the first terminal of the seventh resistor, the second terminal of the seventh resistor is grounded, and the output terminal of the second comparator is connected to the third comparison module;

[0095] The first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the second capacitor and the first end of the third capacitor, the second end of the fifth resistor is respectively connected to the third input module and the second end of the second capacitor, the second end of the second capacitor is connected to the second end of the third capacitor, and the second end of the third capacitor is connected to the output end of the second comparator.

[0096] In this embodiment, the third input module includes a thirteenth resistor, and the third comparison module includes a third comparator, a fourth capacitor, a fifth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a fourteenth resistor;

[0097] The first end of the ninth resistor is connected to the output end of the second comparator, the second end of the ninth resistor is respectively connected to the first end of the fourth capacitor, the first end of the fifth capacitor, and the first end of the tenth resistor, the second end of the fourth capacitor is connected to the second end of the eleventh resistor, the second end of the fifth capacitor is connected to the negative input end of the third comparator, the first end of the eleventh resistor is connected to the negative input end of the third comparator, the second end of the eleventh resistor is connected to the output end of the third comparator, the positive input end of the third comparator is connected to the first end of the twelfth resistor, the second end of the twelfth resistor and the second end of the tenth resistor are grounded, the output end of the third comparator is connected to the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected to the fourth comparison module;

[0098] The first end of the thirteenth resistor is connected to the second end of the fifth resistor, and the second end of the thirteenth resistor is connected to the second end of the fourteenth resistor and the fourth input module respectively.

[0099] In this embodiment, the fourth input module includes a sixteenth resistor, and the fourth comparison module includes a fourth comparator, a fifteenth resistor, and a seventeenth resistor;

[0100] The first end of the sixteenth resistor is connected to the second end of the thirteenth resistor, and the second end of the sixteenth resistor is connected to the output end of the fourth comparator;

[0101] The negative input terminal of the fourth comparator is connected to the second end of the fourteenth resistor, the positive input terminal of the fourth comparator is connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is grounded, the output terminal of the fourth comparator is connected to the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected to the coil high-end signal output module.

[0102] In this embodiment, the coil low-end signal input module includes an eighth resistor, a nineteenth resistor, and a sixth capacitor;

[0103] A first end of the eighth resistor is connected to the low-end signal input end of the coil, and a second end of the eighth resistor is grounded;

[0104] The first end of the nineteenth resistor is connected to the first end of the eighth resistor and the first end of the sixth capacitor respectively, the second end of the sixth capacitor is connected to the second end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the second end of the seventeenth resistor.

[0105] In this embodiment, the coil high-end signal output module includes a single chip microcomputer, an eighteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first diode, and a second diode;

[0106] Pin 5 of the single-chip microcomputer is connected to the second end of the seventeenth resistor, pin 6 of the single-chip microcomputer is connected to the first end of the eighteenth resistor, pin 7 of the single-chip microcomputer is connected to the first end of the twenty-second resistor, the second end of the twenty-second resistor is respectively connected to the first end of the ninth capacitor and the -15V power supply, and the second end of the eighteenth resistor and the second end of the ninth capacitor are grounded;

[0107] Pin 10 of the single-chip microcomputer is connected to a -15V power supply, pin 8 of the single-chip microcomputer is connected to a first end of a 23rd resistor, a second end of the 23rd resistor is connected to a -15V power supply, pin 9 of the single-chip microcomputer is connected to a first end of a 20th resistor, a second end of the 20th resistor is respectively connected to a second end of the 23rd resistor and a positive electrode of the second diode, a negative electrode of the second diode is connected to pin 11 of the single-chip microcomputer, and pin 11 of the single-chip microcomputer is used to output a high-end signal of the coil;

[0108] Pin 12 of the single-chip microcomputer is connected to a +15V power supply and a first end of the eighth capacitor, the second end of the eighth capacitor is grounded, pin 1 of the single-chip microcomputer is connected to a first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to a +15V power supply, pin 2 of the single-chip microcomputer is connected to a first end of the seventh capacitor, the second end of the seventh capacitor is respectively connected to pin 11 of the single-chip microcomputer and the positive electrode of the first diode, and the negative electrode of the first diode is connected to the second end of the twenty-first resistor.

[0109] The new electro-hydraulic servo mechanism running-in equipment has evolved from the original independent running-in pump station to a multi-channel integrated running-in system, which can support the running-in of up to 8 electro-hydraulic servo mechanisms at the same time. In addition, with the cooling system configured, the running-in equipment can work for a long time, greatly improving the running-in efficiency while reducing the investment in human resources.

[0110] The integrated concept and oil circuit design, as well as the digital display visual operation control center, are simple and convenient to operate and can be controlled autonomously, reducing labor intensity. The running-in operation process is fully monitored to detect and deal with problems immediately, ensuring the reliability and safety of the running-in.

[0111] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

[0112] Those of ordinary skill in the art will appreciate that the modules and algorithm steps described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0113] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the above-described devices and equipment can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0114] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0115] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed on multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiments of the present invention.

[0116] In addition, each functional module in the embodiment of the present invention may be integrated into one processing module, or each module may exist physically separately, or two or more modules may be integrated into one module.

[0117] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard disks, ROM, RAM, magnetic disks, or optical disks.

[0118] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0119] It should be understood that the size of the sequence number of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention. For the purpose of example and description, the foregoing description of the implementation of the present disclosure has been given. The foregoing description is not exhaustive and is not intended to limit the present disclosure to the exact form disclosed. Various deformations and modifications may exist according to the above teachings, or various deformations and modifications may be obtained from the practice of the present disclosure. These embodiments are selected and described to illustrate the principles of the present disclosure and its practical application, so that those skilled in the art can use the present disclosure in various embodiments and various modifications suitable for the specific purpose conceived.

Claims

1. An electro-hydraulic servo mechanism running-in system, characterized in that: Including energy station, oil filter system, running-in signal station; The energy station includes a plurality of groups of running-in components, and the input end and the output end of each group of running-in components are respectively connected to the output end and the input end of the oil filter system; The oil filter system is used to filter the hydraulic oil and input the hydraulic oil into the running-in assembly. The hydraulic oil reaches the inside of the electro-hydraulic servo mechanism through the oil circuit adapter, providing high-pressure energy to the electro-hydraulic servo mechanism. The running-in components include an oil pump, a valve group, a workpiece mounting position, and a pressure regulating device; The workpiece mounting position is used to install the electro-hydraulic servo mechanism, and the oil pump is used to transmit the hydraulic oil output by the oil filter system to the electro-hydraulic servo mechanism; The pressure regulating device is used to adjust the inlet pressure and outlet pressure of the workpiece installation position; The running-in signal station is used to receive the first feedback signal of the electro-hydraulic servo mechanism and the position signal collected by the process potentiometer, compare and amplify the first feedback signal and the position signal to output a first control signal, and send the first control signal to the process servo valve through the running-in cable, thereby controlling the action component of the electro-hydraulic servo structure to perform reciprocating motion, so that the high-pressure oil flows inside the electro-hydraulic servo mechanism to flush the internal oil circuit.

2. The electro-hydraulic servo mechanism running-in system according to claim 1, characterized in that: It also includes a control circuit, which is used to obtain a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, a second control signal corresponding to the pressure adjustment target, and a coil low-end signal of the pressure regulating device, and output a coil high-end signal to the pressure regulating device based on the second feedback signal, the second control signal, and the coil low-end signal, so as to control the pressure regulating device to adjust the inlet pressure or the outlet pressure according to the pressure adjustment target.

3. The electro-hydraulic servo mechanism running-in system according to claim 2, characterized in that: The control circuit includes: a comparison module, a control signal input module, a coil high-end signal output module, and a coil low-end signal input module; The control signal input module is connected to the control signal input terminal and is used to receive a second control signal corresponding to a pressure adjustment target, wherein the pressure adjustment target includes an inlet pressure or an outlet pressure of the workpiece; The comparison module is connected to the control signal input module and the feedback signal input terminal, and is used to receive a second feedback signal corresponding to the real-time state of the electro-hydraulic servo mechanism running-in system, compare and amplify the second feedback signal with the second control signal, and output an amplified signal; The coil low-end signal input module is connected to the coil high-end signal output module, and the coil low-end signal input module is used to send the coil low-end signal to the coil high-end signal output module; The coil high-end signal output module is connected to the comparison module, and is used to receive the amplified signal, and output a corresponding coil high-end signal according to the amplified signal and the coil low-end signal to adjust the inlet pressure or outlet pressure of the workpiece.

4. The electro-hydraulic servo mechanism running-in system according to claim 3, characterized in that: The comparison module includes a first comparison module, a second comparison module, a third comparison module and a fourth comparison module; The control signal input module includes a first input module, a second input module, a third input module and a fourth input module; The input end of the first comparison module is connected to the feedback signal input end, the output end of the first comparison module is connected to the input end of the second comparison module, the first end of the first input module is connected to the control signal input end, and the second end of the first input module is connected to the input end of the second comparison module and the first end of the second input module respectively; The output end of the second comparison module is connected to the input end of the third comparison module, and the second end of the second input module is connected to the input end of the third comparison module and the first end of the third input module respectively; The output end of the third comparison module is connected to the input end of the fourth comparison module, and the second end of the third input module is connected to the input end of the fourth comparison module and the first end of the fourth input module respectively; The second end of the fourth input module is connected to the output end of the fourth comparison module, and the output end of the fourth comparison module is connected to the coil high-end signal output module.

5. The electro-hydraulic servo mechanism running-in system according to claim 4, characterized in that: The first input module includes a second resistor, and the first comparison module includes a first comparator, a first resistor, a third resistor, a sixth resistor, and a first capacitor; The positive input terminal of the first comparator is connected to the first terminal of the first resistor and the feedback signal input terminal respectively, the second terminal of the first resistor is grounded, and the negative input terminal of the first comparator is connected to the output terminal of the first comparator; The output end of the first comparator is connected to the first end of the third resistor, the second end of the third resistor is connected to the first end of the sixth resistor and the first end of the first capacitor respectively, the second end of the first capacitor is connected to the second end of the sixth resistor, and the second end of the sixth resistor is connected to the second comparison module; The first end of the second resistor is connected to the control signal input end, and the second end of the second resistor is connected to the second input module and the second end of the first capacitor respectively.

6. The electro-hydraulic servo mechanism running-in system according to claim 5, characterized in that: The second input module includes a fourth resistor, a fifth resistor, a second capacitor, and a third capacitor, and the second comparison module includes a second comparator and a seventh resistor; The negative input terminal of the second comparator is connected to the second terminal of the sixth resistor, the positive input terminal of the second comparator is connected to the first terminal of the seventh resistor, the second terminal of the seventh resistor is grounded, and the output terminal of the second comparator is connected to the third comparison module; The first end of the fourth resistor is connected to the second end of the second resistor, the second end of the fourth resistor is respectively connected to the first end of the fifth resistor, the first end of the second capacitor and the first end of the third capacitor, the second end of the fifth resistor is respectively connected to the third input module and the second end of the second capacitor, the second end of the second capacitor is connected to the second end of the third capacitor, and the second end of the third capacitor is connected to the output end of the second comparator.

7. The electro-hydraulic servo mechanism running-in system according to claim 6, characterized in that: The third input module includes a thirteenth resistor, and the third comparison module includes a third comparator, a fourth capacitor, a fifth capacitor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, and a fourteenth resistor; The first end of the ninth resistor is connected to the output end of the second comparator, the second end of the ninth resistor is respectively connected to the first end of the fourth capacitor, the first end of the fifth capacitor, and the first end of the tenth resistor, the second end of the fourth capacitor is connected to the second end of the eleventh resistor, the second end of the fifth capacitor is connected to the negative input end of the third comparator, the first end of the eleventh resistor is connected to the negative input end of the third comparator, the second end of the eleventh resistor is connected to the output end of the third comparator, the positive input end of the third comparator is connected to the first end of the twelfth resistor, the second end of the twelfth resistor and the second end of the tenth resistor are grounded, the output end of the third comparator is connected to the first end of the fourteenth resistor, and the second end of the fourteenth resistor is connected to the fourth comparison module; The first end of the thirteenth resistor is connected to the second end of the fifth resistor, and the second end of the thirteenth resistor is connected to the second end of the fourteenth resistor and the fourth input module respectively.

8. The electro-hydraulic servo mechanism running-in system according to claim 7, characterized in that: The fourth input module includes a sixteenth resistor, and the fourth comparison module includes a fourth comparator, a fifteenth resistor, and a seventeenth resistor; The first end of the sixteenth resistor is connected to the second end of the thirteenth resistor, and the second end of the sixteenth resistor is connected to the output end of the fourth comparator; The negative input terminal of the fourth comparator is connected to the second end of the fourteenth resistor, the positive input terminal of the fourth comparator is connected to the first end of the fifteenth resistor, the second end of the fifteenth resistor is grounded, the output terminal of the fourth comparator is connected to the first end of the seventeenth resistor, and the second end of the seventeenth resistor is connected to the coil high-end signal output module.

9. The electro-hydraulic servo mechanism running-in system according to claim 8, characterized in that: The coil low-end signal input module includes an eighth resistor, a nineteenth resistor, and a sixth capacitor; A first end of the eighth resistor is connected to the low-end signal input end of the coil, and a second end of the eighth resistor is grounded; The first end of the nineteenth resistor is connected to the first end of the eighth resistor and the first end of the sixth capacitor respectively, the second end of the sixth capacitor is connected to the second end of the nineteenth resistor, and the second end of the nineteenth resistor is connected to the second end of the seventeenth resistor.

10. The electro-hydraulic servo mechanism running-in system according to claim 9, characterized in that: The coil high-end signal output module includes a single chip microcomputer, an eighteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a first diode, and a second diode; Pin 5 of the single-chip microcomputer is connected to the second end of the seventeenth resistor, pin 6 of the single-chip microcomputer is connected to the first end of the eighteenth resistor, pin 7 of the single-chip microcomputer is connected to the first end of the twenty-second resistor, the second end of the twenty-second resistor is respectively connected to the first end of the ninth capacitor and the -15V power supply, and the second end of the eighteenth resistor and the second end of the ninth capacitor are grounded; Pin 10 of the single-chip microcomputer is connected to a -15V power supply, pin 8 of the single-chip microcomputer is connected to a first end of a 23rd resistor, a second end of the 23rd resistor is connected to a -15V power supply, pin 9 of the single-chip microcomputer is connected to a first end of a 20th resistor, a second end of the 20th resistor is respectively connected to a second end of the 23rd resistor and a positive electrode of the second diode, a negative electrode of the second diode is connected to pin 11 of the single-chip microcomputer, and pin 11 of the single-chip microcomputer is used to output a high-end signal of the coil; Pin 12 of the single-chip microcomputer is connected to a +15V power supply and a first end of the eighth capacitor, the second end of the eighth capacitor is grounded, pin 1 of the single-chip microcomputer is connected to a first end of the twenty-first resistor, the second end of the twenty-first resistor is connected to a +15V power supply, pin 2 of the single-chip microcomputer is connected to a first end of the seventh capacitor, the second end of the seventh capacitor is respectively connected to pin 11 of the single-chip microcomputer and the positive electrode of the first diode, and the negative electrode of the first diode is connected to the second end of the twenty-first resistor.

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