A high-pressure oil-filled device for high and low temperature environments

Abstract

This utility model discloses a high-pressure oil filling device for high and low temperature environments, relating to the field of high-pressure fluid equipment technology, including a pump station and an actuator. The pump station provides high-pressure oil through an oil pump motor unit, with a proportional relief valve regulating the pressure, a safety relief valve providing overpressure protection, and an oil pump motor unit controlling the return oil temperature. The actuator delivers oil to the test product in an environment of -55℃ to 70℃ through an isolation cylinder, with a solenoid reversing valve controlling the reversing. This device solves the problems of poor environmental adaptability and unreliable pressure control in existing devices, and is suitable for high-pressure oil filling tests in extreme environments.

Description

Technical Field

[0001] This utility model relates to the field of high-pressure fluid equipment technology, and in particular to a high-pressure oil filling device for use in high and low temperature environments. Background Technology

[0002] In aerospace, polar equipment, and other fields, products must withstand high-pressure hydraulic pressure in extreme high and low temperature environments. Therefore, oil-filling tests are necessary to verify their high-pressure and high / low temperature resistance. Existing oil-filling devices have the following shortcomings:

[0003] Poor environmental adaptability: The oil circuit components of ordinary oil filling devices cannot work stably in extreme temperatures of -55℃ to 70℃. The oil is prone to abnormal viscosity due to temperature changes, which affects the stability of oil filling.

[0004] Low pressure control accuracy: The lack of reliable pressure regulation and protection structure makes it easy to damage the test product due to excessive pressure, or to cause inaccurate test data due to excessive pressure fluctuations.

[0005] Lack of return oil temperature control: During high-pressure oil filling, the oil temperature is prone to rise. Excessive return oil temperature will affect the performance of the oil in the tank, and thus affect subsequent tests.

[0006] Lack of isolation structure: The low or high temperature inside the high and low temperature environment chamber can easily be conducted to the external oil circuit, causing damage to the external pump station components due to temperature.

[0007] Therefore, it is necessary to design a high-pressure oil filling device that can adapt to high and low temperature environments, has precise pressure control, temperature protection, and a reliable structure to solve the above problems. Utility Model Content

[0008] In order to overcome the shortcomings of the prior art, this application proposes a high-pressure oil filling device for high and low temperature environments to solve the problems existing in the prior art.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0010] A high-pressure oil filling device for high and low temperature environments includes a pump station and an actuator. The pump station includes an oil pump motor unit, a suction pump motor unit, a safety relief valve, a proportional relief valve, a solenoid directional valve, and a pressure sensor. The output oil circuit of the oil pump motor unit is sequentially connected to the proportional relief valve and the solenoid directional valve. The safety relief valve is connected in parallel to the oil circuit between the proportional relief valve and the solenoid directional valve. The pressure sensor is installed on the output oil circuit of the oil pump motor unit for real-time monitoring of the output pressure. The actuator includes a check valve, an isolation cylinder, a shut-off valve, a pressure gauge, and a test product. The output end of the solenoid directional valve is connected to the check valve through an oil circuit. The output end of the check valve is connected to the isolation cylinder. The isolation cylinder is connected to the test product. The shut-off valve and the pressure gauge are connected in series in the oil circuit between the isolation cylinder and the test product. The isolation cylinder and the test product are placed in a high and low temperature environment chamber. The suction pump motor unit is connected to the return oil circuit and is used to control the return oil temperature.

[0011] As a further technical solution of this utility model: the oil pump motor unit is a plunger pump motor unit with an output pressure range of 0-70MPa and a flow range adapted to the oil filling requirements of the tested product.

[0012] As a further technical solution of this utility model: the proportional relief valve is used to adjust the pressure of the oil circuit output by the oil pump motor unit, and can adjust the system pressure to the target pressure required by the test product; the set pressure of the safety relief valve is higher than the maximum adjustment pressure of the proportional relief valve, and is used to overflow and relieve pressure when the proportional relief valve is abnormally adjusted, so as to prevent the system from being over-pressured and damaging the test product.

[0013] As a further technical solution of this utility model: the electromagnetic reversing valve is provided with two output terminals, A and B. By controlling the gain and loss of power of the electromagnets at both ends of the electromagnetic reversing valve, the oil circuit of terminals A and B can be switched to achieve bidirectional oil delivery to the isolation cylinder, thereby controlling the reversing test of the tested product.

[0014] As a further technical solution of this utility model: the one-way valve of the actuator is used to prevent the oil from flowing backward and to ensure the oil pressure in the isolation cylinder and the test product is stable; the shut-off valve is used to cut off the oil circuit between the isolation cylinder and the test product when the test is stopped or maintenance is performed, so as to achieve safe isolation.

[0015] As a further technical solution of this utility model: a cooling fan is provided on the return oil line of the oil pump motor unit. The oil pump motor unit is used to drive the return oil circulation, and the cooling fan is used to reduce the temperature of the return oil to ensure that the oil temperature in the oil tank is stable within the test allowable range.

[0016] As a further technical solution of this utility model: the pressure gauge is installed in the oil circuit between the isolation cylinder and the test product to monitor the oil pressure entering the test product in real time; the pressure sensor is connected to an external control system and can transmit and display the pressure data of the output oil circuit in real time.

[0017] As a further technical solution of this utility model: the isolation cylinder is used to isolate the oil inside and outside the high and low temperature environment chamber. Its cylinder body is made of high and low temperature resistant sealing material, which can work stably in an environment of -55℃ to 70℃, ensuring that the high pressure oil is reliably delivered to the test product.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. Adaptability to extreme environments: Through the isolation cylinder and high and low temperature resistant sealing design, it can work stably in environments ranging from -55℃ to 70℃, meeting the needs of extreme environment testing in aerospace, polar equipment and other fields;

[0020] 2. High-pressure precision control: The proportional relief valve enables precise pressure regulation, and the safety relief valve provides overpressure protection. The pressure control accuracy is ≤±0.5MPa, avoiding damage to the tested product.

[0021] 3. Stable oil temperature: The oil pump motor unit, together with the cooling fan, controls the return oil temperature, ensuring stable oil performance in the tank and improving test repeatability;

[0022] 4. Safe and reliable operation: The one-way valve prevents backflow, and the shut-off valve provides safe isolation. The multiple protection structures reduce the risk of testing.

[0023] 5. Comprehensive functions: It can realize multiple functions such as high-pressure oil filling and reversal test, and adapt to the test needs of different products. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the pump station components;

[0025] Figure 2 This is a schematic diagram of the components of the executing mechanism.

[0026] In the diagram: 1-oil pump motor unit, 2-oil pump motor unit, 3-safety relief valve, 4-proportional relief valve, 5-solenoid directional valve, 6-pressure sensor, 11-check valve, 12-isolation cylinder, 13-stop valve, 14-pressure gauge. Detailed Implementation

[0027] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] like Figures 1-2 As shown, a high-pressure oil filling device for high and low temperature environments includes a pump station and an actuator, which are connected by an oil circuit to work together to achieve high-pressure oil filling tests under high and low temperature environments.

[0029] The pump station provides high-pressure oil to the system and enables pressure and temperature control, including:

[0030] Oil pump motor unit 1: A plunger pump motor unit is used as a power source to output high-pressure oil, which can provide a pressure of 0-70MPa to meet the requirements of high-pressure testing;

[0031] Proportional relief valve 4: Installed on the output oil line of oil pump motor unit 1, the output pressure can be controlled by adjusting the valve opening, and can be accurately adjusted to the target pressure required by the test product;

[0032] Safety relief valve 3: It is connected in parallel to the oil circuit between proportional relief valve 4 and solenoid directional valve 5. Its set pressure is slightly higher than the maximum adjustment pressure of proportional relief valve 4, such as 70MPa. When the proportional relief valve 4 is adjusted abnormally and the pressure exceeds the limit, the safety relief valve 3 will automatically open to relieve pressure and prevent damage to the tested product.

[0033] Electromagnetic directional valve 5: It has two output terminals, A and B. By controlling the gain and loss of the electromagnets at both ends to switch the oil circuit on and off, it realizes bidirectional oil delivery to the actuator.

[0034] Pressure sensor 6: Installed on the output oil line of oil pump motor unit 1, connected to the external control system, to monitor and display output pressure data in real time;

[0035] Oil pump motor unit 2: connected to the return oil circuit, equipped with a cooling fan, used to drive the return oil circulation and cool it down, so as to avoid the oil temperature in the oil tank from being too high, such as exceeding 50℃, which would affect the test.

[0036] Oil-filled operation of actuators in high and low temperature environments:

[0037] The actuator is used to deliver high-pressure oil to the test product in high and low temperature environments, including:

[0038] One-way valve 11: Installed in the oil circuit between the output end of the solenoid directional valve 5 and the isolation cylinder 12 to prevent oil from flowing in reverse and ensure stable oil pressure;

[0039] Isolation cylinder 12: It adopts high and low temperature resistant sealing materials such as fluororubber seals and is placed in the high and low temperature environment chamber to isolate the oil inside and outside the environment chamber. The oil from the external pump station is transferred to the test product through the isolation cylinder 12 to avoid the high and low temperature directly affecting the external oil circuit.

[0040] Shut-off valve 13: Installed in the oil circuit between the isolation cylinder 12 and the test product 15, it is closed when the test is stopped or maintenance is performed to achieve oil isolation;

[0041] Pressure gauge 14: Connected in series between shut-off valve 13 and product under test 15, it visually displays the oil pressure entering the product under test;

[0042] Test product 15: Placed in a high and low temperature environment chamber and connected to the isolation oil cylinder 12, it receives high-pressure oil to complete the test.

[0043] The working principle is as follows:

[0044] Pressure regulation and output:

[0045] After the oil pump motor unit 1 is started, the oil is delivered to the proportional relief valve 4 through the output oil circuit. The pressure is adjusted to the required value of the test product, such as 30MPa, by adjusting the proportional relief valve 4. The pressure sensor 6 monitors the output pressure in real time and provides feedback to ensure pressure stability. If the proportional relief valve 4 is adjusted abnormally and the pressure exceeds the safety value, such as 70MPa, the safety relief valve 3 will automatically open to relieve pressure and protect the system and the test product.

[0046] Oil filling under high and low temperature environments:

[0047] The test product 15 and the isolation cylinder 12 are placed in a high and low temperature environment chamber with a set temperature such as -55℃ or 70℃. After the solenoid reversing valve 5 is energized, the oil circuit at end A or B is opened, and the high-pressure oil enters the isolation cylinder 12 through the check valve 11, and is then delivered to the test product 15 through the shut-off valve 13. The check valve 11 prevents the oil from flowing back, and the pressure gauge 14 displays the pressure entering the test product in real time to ensure the stability of the oil filling process.

[0048] Oil return temperature control:

[0049] During the test, the return oil flows back through the return oil circuit, the oil pump motor unit 2 drives the oil circulation, and the cooling fan cools the return oil to prevent the oil temperature in the tank from getting too high and keeps it below 50℃ to ensure stable oil performance.

[0050] Commutation test control:

[0051] By switching the gain and loss of the electromagnets at both ends of the solenoid reversing valve 5, the oil circuits at ends A and B can be alternately connected to achieve bidirectional oil filling of the isolation cylinder 12, thereby controlling the test product 15 to complete the reversing test and verifying its reversing performance under high and low temperature and high pressure.

[0052] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0053] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment have been appropriately combined to form other embodiments that are easy for those skilled in the art to understand.

Claims

1. A high-pressure oil filling device for use in high and low temperature environments, characterized by, The system includes a pump station and an actuator; the pump station includes an oil pump motor unit (1), an oil pump motor unit (2), a safety relief valve (3), a proportional relief valve (4), a solenoid directional valve (5), and a pressure sensor (6). The output oil circuit of the oil pump motor unit (1) is sequentially connected to the proportional relief valve (4) and the solenoid directional valve (5). The safety relief valve (3) is connected in parallel to the oil circuit between the proportional relief valve (4) and the solenoid directional valve (5). The pressure sensor (6) is installed on the output oil circuit of the oil pump motor unit (1) for real-time monitoring of the output pressure; the actuator includes a check valve (11) and an isolation cylinder. (12), shut-off valve (13), pressure gauge (14) and test product (15), the output end of the solenoid directional valve (5) is connected to the check valve (11) through the oil circuit, the output end of the check valve (11) is connected to the isolation cylinder (12), the isolation cylinder (12) is connected to the test product (15), the shut-off valve (13) and pressure gauge (14) are connected in series in the oil circuit between the isolation cylinder (12) and the test product (15); the isolation cylinder (12) and the test product (15) are used to be placed in the high and low temperature environment chamber, and the oil pump motor unit (2) is connected to the return oil circuit and used to control the return oil temperature.

2. The apparatus of claim 1, wherein, The oil pump motor unit (1) is a plunger pump motor unit.

3. The apparatus of claim 1, wherein, The set pressure of the safety relief valve (3) is higher than the maximum adjustment pressure of the proportional relief valve (4), and is used to relieve pressure when the proportional relief valve (4) is abnormally adjusted, so as to prevent the system from being over-pressured and damaging the test product (15).

4. The apparatus of claim 1, wherein, The electromagnetic reversing valve (5) has two output terminals, A and B. By controlling the gain and loss of power of the electromagnets at both ends of the electromagnetic reversing valve (5), the oil circuits at terminals A and B are switched to achieve bidirectional oil delivery to the isolation cylinder (12), thereby controlling the reversing test of the test product (15).

5. The apparatus of claim 1, wherein, The pressure gauge (14) is installed in the oil circuit between the isolation cylinder (12) and the test product (15), and the pressure sensor (6) is connected to the external control system.

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