Servo driving energy system device and implementation method

Abstract

The invention discloses a servo drive energy system device and an implementation method.The servo drive energy system device comprises an energy supply main system and a plurality of energy supply branch systems, and the energy supply main system comprises an oil tank, a servo drive unit and a proportional overflow valve; the servo drive unit conducts pressure adjustment on hydraulic oil in an oil tank through a proportional overflow valve and then conveys the hydraulic oil to a plurality of energy supply branch systems. Each energy supply branch system comprises a proportional pressure reduction overflow valve, an electromagnetic reversing valve, a hydraulic control one-way valve and a servo oil cylinder, the proportional pressure reduction overflow valves conduct pressure adjustment on hydraulic oil conveyed into the energy supply branch systems, and the adjusted hydraulic oil passes through the electromagnetic reversing valves and is conveyed to the servo oil cylinders through the hydraulic control one-way valves. And the oil is transmitted to an oil inlet of the servo oil cylinder after being hydraulically controlled by the one-way valve. According to the scheme, when multiple oil ways work at the same time and a main system is in an unloading state, the oil cylinder in each oil way can still have a pressure maintaining function, and the energy-saving effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the field of aerospace manufacturing technology, and in particular to a servo drive energy system device and an implementation method. Background Art

[0002] The servo drive system is used to provide pressure and flow for semi-physical simulation experimental equipment. The system has the characteristics of centralized oil supply, multi-channel output, and adjustable pressure of each trunk line. At the same time, all operations can be controlled locally or remotely.

[0003] See also Figure 1 The existing servo drive system is mainly composed of a motor 8, a high-pressure pump 11, an accumulator 23, a filter 13, a proportional relief valve 19, a proportional pressure reducing relief valve 20 and a stop valve 22; it provides independently adjustable energy pressure for a variety of different loading devices, and each circuit is equipped with a corresponding pressure measuring device; it mainly realizes the pressure maintaining function of the main oil pump under the unloading state.

[0004] However, the solenoid valve in the existing servo drive system cannot be used to maintain pressure, and the pressure is lost quickly during the test, which fails to meet the design requirements, resulting in the technical problem of low reliability of the servo drive system during the test.

[0005] It can be seen that how to improve the reliability of the servo drive system during the test process is a problem that needs to be solved in this field. Summary of the invention

[0006] In order to achieve the above-mentioned object, the present invention provides a servo-driven energy system device, including an energy supply main system and a plurality of energy supply branch systems, wherein the energy supply main system includes an oil tank, a servo drive unit and a proportional relief valve, and the servo drive unit transports the hydraulic oil in the oil tank to the plurality of energy supply branch systems after pressure adjustment through the proportional relief valve;

[0007] The several energy supply branch systems respectively include a proportional pressure reducing relief valve, an electromagnetic reversing valve, a hydraulically controlled one-way valve and a servo cylinder. The proportional pressure reducing relief valve regulates the pressure of the hydraulic oil delivered to the energy supply branch system. The regulated hydraulic oil is transmitted to the oil inlet of the servo cylinder after passing through the electromagnetic reversing valve and the hydraulically controlled one-way valve.

[0008] Furthermore, the oil tank is provided with a temperature sensor for monitoring the oil temperature in the hydraulic oil tank.

[0009] Furthermore, a liquid level transmitter is provided in the oil tank, and the real-time liquid level in the hydraulic oil tank is monitored by the liquid level transmitter. If the liquid level is lower than a preset value, an alarm is issued.

[0010] Furthermore, an oil suction filter is provided at the port of the servo drive unit, and the hydraulic oil sucked by the servo drive unit is subjected to a first level of impurity filtration through the oil suction filter.

[0011] Furthermore, the energy supply branch system is also provided with an accumulator for replenishing oil and absorbing pipeline pulsation.

[0012] Furthermore, the servo oil cylinder is provided with an oil return port, and the oil return port is connected to the oil tank through an oil return pipeline.

[0013] Furthermore, an oil return filter for filtering the return oil is provided between the oil return pipeline and the oil tank.

[0014] Furthermore, a first safety valve is provided in the oil return pipeline and the output oil circuit of the energy supply main system.

[0015] Furthermore, an electromagnetic unloading valve is provided in the oil return pipeline and the output oil circuit of the energy supply main system.

[0016] In order to achieve the above object, the present invention provides an implementation method of a servo-driven energy system device, which is implemented based on the servo-driven energy system device and includes the following steps:

[0017] When the unloading / loading valve is energized, the system is loaded, and the oil is transported to the proportional pressure reducing relief valve, electromagnetic reversing valve, and hydraulically controlled check valve through the energy supply main system;

[0018] When the second end of the electromagnetic reversing valve is energized, oil enters the rodless chamber of the oil cylinder. After the pressure is adjusted by the proportional relief valve during the operation of the main system, the pressure of the servo oil cylinder is adjusted by adjusting the proportional pressure reducing relief valve. When the pressure is adjusted to a certain level, the electromagnetic reversing valve loses power and is in the middle position.

[0019] The pressure of the proportional relief valve and proportional pressure reducing relief valve is adjusted to zero, the power is lost, the electromagnetic unloading valve loses power, the motor is turned off, and the cylinder is in a pressure-maintaining state;

[0020] When the oil cylinder needs to relieve pressure, the first end of the electromagnetic reversing valve is energized and the oil cylinder relieves pressure.

[0021] The servo drive system and implementation method provided by the present invention improve the functional type of the electromagnetic reversing valve during the test process, add a hydraulically controlled one-way valve with a pressure maintaining function, and the pressure hardly changes within the designed time, thereby improving the reliability of the servo drive system during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Figure 1It is a system principle structure diagram of the existing servo drive energy system device;

[0024] Figure 2 This is the system principle structure diagram of the servo drive energy system device;

[0025] Figure 3 This is a schematic diagram of the structure of the electromagnetic reversing valve in this servo drive energy system device.

[0026] The following is a description of the components in the accompanying drawings:

[0027] 100. Energy supply main system 101. Oil tank 102. Temperature sensor 103. Liquid level meter 104. Respirator 105. Liquid level transmitter 106. Oil suction filter 107. Oil suction ball valve 108. Motor 109. Bell cover 110. Coupling 111. Gear pump 112. Oil discharge ball valve 113. Pressure filter 114. Solenoid unloading valve 115. Check valve 116. Pressure measuring joint 117. First safety valve 118. Proportional relief valve 119. First pressure sensor 120. Fourth pressure sensor 121. Return oil filter

[0028] 200. Energy supply branch system 201. Proportional pressure reducing relief valve 202. Second pressure sensor 203. Second safety valve 204. Solenoid reversing valve 205. Third pressure sensor 206. Hydraulic control check valve 207. Accumulator 208. Stainless steel medium and high pressure ball valve 209. Servo cylinder. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0030] The servo drive energy system device provided by the present invention, see Figure 2 It is mainly composed of a main energy supply system 100 and several energy supply branch systems 200. The main energy supply system 100 provides energy for the several energy supply branch systems 200. The several energy supply branch systems 200 can be connected to different loading devices respectively to provide independently adjustable energy pressures for different loading devices. On this basis, this solution is also equipped with corresponding pressure measuring devices on each energy supply branch system. When the several energy supply branch systems 200 provide working energy for different loading devices, the main energy supply system 100 can be in an unloading state, and the oil cylinders of the several energy supply branch systems 200 are still in a pressure maintaining function to ensure that the device can operate continuously. At the same time, when the pressure maintaining continuously provides the required pressure to the device, the main energy supply system 100 is in an unloading state, which can achieve energy-saving effects.

[0031] The energy supply main system 100 is the main oil circuit of the entire oil circuit, which is used to provide energy for multiple energy supply branch systems 200, and includes an oil tank 101, a servo drive unit, and a proportional overflow valve 118.

[0032] The oil tank 101 is used to store hydraulic oil. An oil drain ball valve 112 is provided on the oil tank 101 for draining the oil from the oil tank 101 .

[0033] Preferably, the oil tank 101 is also provided with a temperature sensor 102, and the temperature sensor 102 is used to monitor the oil temperature in the hydraulic oil tank 101 to prevent the oil temperature from being too high or too low, thereby causing potential safety hazards.

[0034] Preferably, the oil tank 101 is also provided with a breather 104. The breather 104 can prevent the pressure in the hydraulic oil tank 101 from being over-pressurized and causing damage to the oil tank.

[0035] Preferably, the oil tank 101 is also provided with a liquid level transmitter 105, and the real-time liquid level in the hydraulic oil tank 101 is monitored by the liquid level transmitter 105. If the liquid level is lower than a preset value, an alarm is issued.

[0036] Preferably, a liquid level meter 103 may be provided in the oil tank 101 for auxiliary monitoring. If the liquid level transmitter 105 fails, the liquid level value in the oil tank 101 may be directly obtained through the liquid level meter 103, thereby further ensuring the reliability of the system.

[0037] It should be noted here that the structure and working principle of the oil drain ball valve 112, the temperature sensor 102, the respirator 104, the liquid level transmitter 105 and the liquid level meter 103 are well known to those skilled in the art and will not be described in detail here.

[0038] The servo drive unit is used to pump the hydraulic oil in the oil tank 101 to the corresponding oil circuit through the servo drive unit. The servo drive unit includes a motor 108 , a bell housing 109 , a coupling 110 and a gear pump 111 .

[0039] The driving shaft of the motor 108 and the pump shaft of the gear pump 111 are connected through a coupling 110 to realize the transmission between the motor 108 and the gear pump 111. The gear pump 111 transports the oil in the oil tank 101 through an output pipeline to the corresponding energy supply branch systems 200. At the same time, the bell cover 109 is used to ensure that the motor 108 and the gear pump 111 are in coaxial operation.

[0040] Preferably, an oil suction ball valve 107 is provided at the oil suction port of the gear pump 111. The oil suction ball valve 107 can avoid the problem of poor oil suction capacity of the gear pump 111 and improve the oil supply environment.

[0041] Preferably, an oil suction filter 106 is also provided at the oil suction port of the gear pump 111. The hydraulic oil sucked by the gear pump 111 is filtered by the oil suction filter 106 and then transported to the branch oil circuit. The hydraulic oil in the oil tank 101 can be filtered for the first level of impurities to avoid affecting the operation of the device.

[0042] At the same time, a pressure filter 113 is provided at the output end of the gear pump 111. The pressure filter 113 is provided to perform a second level of impurity filtration on the hydraulic oil in the oil tank 101, thereby further ensuring the cleanliness of the oil.

[0043] Preferably, a one-way valve 115 is provided at the oil outlet of the gear pump 111. By providing the one-way valve 115, the hydraulic oil can only be transported to the energy supply branch system 200 in one direction without backflow, thereby avoiding oil circuit failure.

[0044] Preferably, a first pressure sensor 119 is provided in the output pipeline of the energy supply main system 100 , and the first pressure sensor 119 is provided to detect the pressure of the hydraulic oil input from the gear pump 111 to the energy supply branch system 200 .

[0045] Furthermore, several energy supply branch systems 200 are independently arranged and respectively connected to the energy supply main system 100, and the hydraulic oil provided by the energy supply main system 100 is used to control the device to work. Several energy supply branch systems 200 respectively include a proportional pressure relief valve 201, an electromagnetic reversing valve 204 and a servo cylinder 209.

[0046] The proportional pressure reducing relief valve 201 is used to adjust the pressure of the hydraulic oil delivered to the energy supply branch system 200 and then output it to the oil inlet of the servo cylinder 209. It can provide independently adjustable energy pressure for different loading devices. The oil outlet of the servo cylinder 209 is delivered to the corresponding device to realize the loading of the device.

[0047] Preferably, the proportional pressure reducing relief valve 201 is provided with a second pressure sensor 202 and a second safety valve 203. The second pressure sensor 202 is used to detect the pressure of the hydraulic oil after being adjusted by the proportional pressure reducing relief valve 201, and the second safety valve 203 is used to protect the oil circuit to prevent the system pressure from being too high.

[0048] An electromagnetic reversing valve 204 is provided between the proportional pressure reducing relief valve 201 and the servo oil cylinder 209, and the fluid is controlled by the electromagnetic reversing valve 204. For example, see Figure 3When the electromagnetic reversing valve 204a is energized, the electromagnetic reversing valve 204b is blocked, and the hydraulic oil enters the rodless chamber of the cylinder through the electromagnetic reversing valve 204a end; when the electromagnetic reversing valve 204b is energized, the electromagnetic reversing valve 204a is different, the cylinder returns oil through the electromagnetic reversing valve 204b, and the servo cylinder 209 is depressurized.

[0049] Preferably, a hydraulically controlled one-way valve 206 is provided on the output path of the electromagnetic reversing valve 204. The function type of the electromagnetic reversing valve 204 is improved, and a hydraulically controlled one-way valve 206 with a pressure-maintaining function is added. The pressure hardly changes within the design time, meeting the user's requirements.

[0050] Preferably, a third hydraulic pressure sensor 205 is provided on the output path of the electromagnetic reversing valve 204 , and the third hydraulic pressure sensor 205 is provided to detect the pressure of the hydraulic oil output by the electromagnetic reversing valve 204 .

[0051] An accumulator 207 is also provided in the oil circuit. By providing the accumulator 207, when the flow required by the load is less than the flow of the hydraulic pump during low-speed movement, the excess flow of the hydraulic pump is stored in the accumulator 207. When the load requires a flow greater than the flow of the hydraulic pump, liquid is released from the accumulator 207 to make up for the insufficient flow of the hydraulic pump. At the same time, when the instantaneous pressure of the system increases, it can absorb this part of the energy to ensure that the pressure of the entire system is normal.

[0052] Stainless steel medium and high pressure ball valves 208 are respectively provided on both sides of the accumulator 207 for cutting off or connecting the medium in the pipeline and can also be used for regulating and controlling the fluid.

[0053] The servo cylinder 209 is provided with an oil return port, which is connected to the oil tank 101 through an oil return pipeline. A fourth hydraulic sensor 120 is provided at the oil return port to perform hydraulic detection on the return oil delivered to the oil tank 101.

[0054] At the same time, preferably, a return oil filter 121 is provided between the return oil pipeline and the oil tank 101, and the return oil is filtered of impurities through the return oil filter 121 and then transported to the oil tank 101, so as to avoid contamination of the hydraulic oil in the oil tank 101 and waste of resources.

[0055] Furthermore, a proportional relief valve 118 is provided in the return oil pipeline and the output oil pipeline of the energy supply main system 100. The proportional relief valve 118 is used to stabilize the pressure in the output pipeline of the energy supply main system 100 and the return oil pipeline, and perform overload protection, so that the hydraulic oil output to the energy supply branch system 200 is maintained at a constant flow rate, thereby ensuring the safety of the oil circuit.

[0056] At the same time, pressure measuring interfaces 116 are provided on both sides of the proportional relief valve 118. By providing the pressure measuring interfaces 116, a pressure measuring device can be connected to perform pressure detection on the proportional relief valve 118 or the oil circuit where the proportional relief valve 118 is located.

[0057] Secondly, a first safety valve 117 is provided in the return oil pipeline and the output oil circuit of the energy supply main system 100. The first safety valve 117 prevents the output oil circuit and the return oil circuit from being over-pressured, thereby protecting the output oil circuit and the return oil circuit.

[0058] In addition, electromagnetic unloading valves 114 are provided in the output oil circuit and the return oil circuit to control the pressure and flow of the output and circuit hydraulic oil, stabilize the working pressure of the system, and protect the system from overload. When a system failure occurs and the pressure is too high and exceeds the set value, the pressure switch will operate to open the valve and discharge the excessive pressure inside the system out of the system, thereby avoiding equipment damage or personal injury accidents caused by overpressure.

[0059] The servo drive energy system device formed by the above scheme, this scheme also provides an implementation method of the servo drive energy system device, the implementation method includes:

[0060] When the unloading / loading valve is powered, the system is loaded, and the oil is delivered to the proportional pressure reducing relief valve 201, the electromagnetic reversing valve 204, and the hydraulically controlled non-return valve 206 through the energy supply main system 100;

[0061] When the second end of the electromagnetic reversing valve 204 is energized, oil enters the rodless chamber of the servo oil cylinder 209. After the energy supply main system 100 works and the pressure is adjusted by the proportional relief valve 118, the pressure of the servo oil cylinder 209 is adjusted by adjusting the proportional pressure reducing relief valve 201. When the pressure is adjusted to a certain value, the electromagnetic reversing valve 204 loses power and is in the middle position.

[0062] The pressure of the proportional relief valve 118 and the proportional pressure reducing relief valve 201 is adjusted to zero, the power is lost, the electromagnetic unloading valve 114 is powered off, the motor 108 is turned off, and the servo cylinder 209 is in a pressure maintaining state;

[0063] When the servo oil cylinder 209 needs to release pressure, the first end of the electromagnetic reversing valve 204 is energized, and the servo oil cylinder 209 releases pressure.

[0064] The implementation method of the servo drive energy system device provided by the above scheme can realize that multiple oil circuits work simultaneously, and when the main system is in the unloading state, the oil cylinder in each oil circuit can also be in the pressure maintaining function. The following is based on the provided implementation method and the provided servo drive energy system device, and specifically describes its working process during application. The specific working process is as follows:

[0065] 1. Energy supply main system 100 pressure debugging:

[0066] 1.1. The starter motor 108 starts working through the bell housing 109 and the coupling 110, and the gear pump 111 starts working. The hydraulic oil passes through the pressure filter 113 and the one-way valve 115 to provide energy to each branch system. At this time, the proportional relief valve 118 acts to adjust the system pressure. Specifically, the system pressure is adjusted through the following steps:

[0067] 1.1.1: When the motor 108 is working normally;

[0068] 1.1.2: The electromagnetic unloading valve 114 is energized, and the main system starts to build pressure;

[0069] 1.1.3: Adjust the safety pressure of the first safety valve 117;

[0070] 1.1.4: Adjust the system pressure of the proportional relief valve 118 (at this time, the pressure of the proportional relief valve 118 is lower than the pressure of the first safety valve 117);

[0071] 2. Energy supply branch system 200 pressure debugging:

[0072] 2.1: When the right end of the electromagnetic reversing valve 204 in at least one path is energized, the hydraulic pressure reaches the servo cylinder through the electromagnetic reversing valve 204, the hydraulic control check valve 206, and the stainless steel medium and high pressure ball valve 208;

[0073] 2.2: Adjust the cylinder pressure by adjusting the proportional pressure reducing relief valve 201;

[0074] 3. Maintain pressure:

[0075] 3.1: When the proportional pressure reducing relief valve 201 is adjusted to adjust the oil cylinder pressure, the electromagnetic reversing valve 204 loses power and is in the middle position, the electromagnetic unloading valve 114 loses power, the pressure of the gear pump 111 is unloaded through the electromagnetic unloading valve 114, and then the servo drive unit is closed. At this time, the servo oil cylinder 209 is in a pressure-maintaining state;

[0076] 4. Unloading:

[0077] 4.1: Restart to make motor 108 work;

[0078] 4.2: The electromagnetic unloading valve 114 is energized, and the main system starts to build pressure;

[0079] 4.3: When the left end of the electromagnetic reversing valve 204 in at least one path is energized, the servo cylinder 209 is depressurized;

[0080] 5. The main system starts to release pressure; the pressure of the electromagnetic reversing valve 204 and the proportional pressure reducing relief valve 201 is adjusted to zero, the electromagnetic unloading valve 114 is energized, and the motor 108 is turned off;

[0081] This solution can achieve simultaneous operation of multiple oil circuits, and when the main system is in an unloading state, the oil cylinder in each oil circuit can also be in a pressure-maintaining function, thereby achieving an energy-saving effect.

[0082] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A servo-driven energy system device, comprising an energy supply main system and a plurality of energy supply branch systems, wherein the energy supply main system comprises an oil tank, a servo drive unit and a proportional relief valve, wherein the servo drive unit transports the hydraulic oil in the oil tank to the plurality of energy supply branch systems after pressure adjustment through the proportional relief valve; It is characterized in that The several energy supply branch systems respectively include a proportional pressure reducing relief valve, an electromagnetic reversing valve, a hydraulically controlled one-way valve and a servo cylinder. The proportional pressure reducing relief valve regulates the pressure of the hydraulic oil delivered to the energy supply branch system. The regulated hydraulic oil is transmitted to the oil inlet of the servo cylinder after passing through the electromagnetic reversing valve and the hydraulically controlled one-way valve.

2. A servo drive energy system device according to claim 1, characterized in that: The oil tank is equipped with a temperature sensor for monitoring the oil temperature in the hydraulic oil tank.

3. A servo drive energy system device according to claim 1, characterized in that: The oil tank is equipped with a liquid level transmitter, which is used to monitor the real-time liquid level in the hydraulic oil tank. If the liquid level is lower than a preset value, an alarm is issued.

4. A servo drive energy system device according to claim 1, characterized in that: The port of the servo drive unit is provided with an oil suction filter, through which the hydraulic oil sucked by the servo drive unit is subjected to a first level of impurity filtration.

5. A servo drive energy system device according to claim 1, characterized in that: The energy supply branch system is also provided with an accumulator for replenishing oil and absorbing pipeline pulsation.

6. A servo drive energy system device according to claim 1, characterized in that: The servo oil cylinder is provided with an oil return port, and the oil return port is connected to the oil tank through an oil return pipeline.

7. A servo drive energy system device according to claim 6, characterized in that: An oil return filter for filtering the return oil is provided between the oil return pipeline and the oil tank.

8. A servo drive energy system device according to claim 6, characterized in that: A first safety valve is provided in the oil return pipeline and the output oil circuit of the energy supply main system.

9. A servo drive energy system device according to claim 6, characterized in that: An electromagnetic unloading valve is provided in the oil return pipeline and the output oil circuit of the energy supply main system.

10. A method for implementing a servo drive energy system device, characterized in that: The implementation method is implemented based on the servo drive energy system device described in claims 1 to 9 above, and comprises the following steps: When the unloading / loading valve is energized, the system is loaded, and the oil is transported to the proportional pressure reducing relief valve, electromagnetic reversing valve, and hydraulically controlled check valve through the energy supply main system; When the second end of the electromagnetic reversing valve is energized, oil enters the rodless chamber of the oil cylinder. After the pressure is adjusted by the proportional relief valve during the operation of the main system, the pressure of the servo oil cylinder is adjusted by adjusting the proportional pressure reducing relief valve. When the pressure is adjusted to a certain level, the electromagnetic reversing valve loses power and is in the middle position. The pressure of the proportional relief valve and proportional pressure reducing relief valve is adjusted to zero, the power is lost, the electromagnetic unloading valve loses power, the motor is turned off, and the cylinder is in a pressure-maintaining state; When the oil cylinder needs to relieve pressure, the first end of the electromagnetic reversing valve is energized and the oil cylinder relieves pressure.

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