Air tightness detection system and method for hydraulic clutch

Abstract

The invention discloses an air tightness detection system and method for a hydraulic clutch. The system comprises a controller, an impact pipeline and a detection pipeline, wherein the impact pipeline and the detection pipeline are communicated with each working cavity of the hydraulic clutch; the other end of the impact pipeline is connected with an air source; a one-way valve and a pneumatic impact valve are arranged on the impact pipeline; the detection pipeline comprises a detection header pipe shared by the two working cavities and detection branch pipes arranged between the detection header pipe and the corresponding working cavities; the other end of the detection header pipe is connected with an air source, the detection header pipe is provided with an airflow adjusting and detecting device, a first pressure gauge and a first pressure transmitter, and the detection branch pipe is provided with an electromagnetic valve; the controller is in signal connection with the first pressure transmitter, the pneumatic impact valve, an execution element of the airflow adjusting and detecting device and the two-way electromagnetic valve. Compressed air is adopted to replace an oil product for predelivery test of the hydraulic clutch, the test cost is reduced, pollution and consumption are reduced, and maintenance is easy.

Description

Technical Field

[0001] The present application relates to the field of engineering machinery, and more specifically, to an air tightness detection system and method for a hydraulic clutch. Background Art

[0002] As the main component in the hydraulic transmission of a forklift, the hydraulic clutch is directly related to the performance of the vehicle's transmission system and is an important component to ensure the reliable operation of the vehicle.

[0003] The current factory test of forklift hydraulic clutch is carried out by hydraulic pump station. Under static conditions, pressurized oil with constant pressure and flow is introduced into the working chamber of the hydraulic clutch to detect the pressure that can be established under constant flow and pressure in the forward and reverse gears of the clutch to determine whether the sealing of the clutch meets the requirements.

[0004] There are many problems with the hydraulic pump test method:

[0005] 1) High test cost: Hydraulic oil has the problem of oil contamination. Test oil needs to be replaced, replenished and purified regularly, resulting in increased oil procurement costs and oil purifier consumables costs, as well as energy waste;

[0006] 2) Prone to pollution: Since the residual oil inside the clutch after the test cannot be completely drained, it is easy to cause oil pollution in the gearbox assembly line;

[0007] 3) The hydraulic test bench occupies a large area, affecting the overall process layout of the workshop and making maintenance difficult. Summary of the invention

[0008] The present application provides a hydraulic clutch air tightness detection system and method, which uses compressed air instead of oil to perform factory testing of the hydraulic clutch, thereby reducing testing costs, reducing pollution and consumption, and making maintenance easier.

[0009] The present application provides an air tightness detection system for a hydraulic clutch, comprising a controller, an impact pipeline and a detection pipeline connected to each working chamber of the hydraulic clutch;

[0010] The other end of the impact pipeline is connected to the gas source, and a one-way valve and a pneumatic impact valve are arranged on the impact pipeline;

[0011] The detection pipeline includes a detection main pipe shared by the two working chambers and a detection branch pipe arranged between the detection main pipe and the corresponding working chamber; the other end of the detection main pipe is connected to the gas source, the detection main pipe is provided with an air flow adjustment and detection device, a first pressure gauge and a first pressure transmitter, and the detection branch pipe is provided with a solenoid valve;

[0012] The controller is connected with the first pressure transmitter, the pneumatic impact valve, the actuator of the airflow regulating and detecting device and the electromagnetic valve signal.

[0013] Preferably, the air tightness detection system further comprises a sliding frame mounted above the clutch production line, a first connecting seat suspended below the sliding frame, and a detection box body separately arranged from the first connecting seat;

[0014] The first connecting seat is provided with a slot connected to the end of the hydraulic clutch, and the two opposite side walls of the slot are respectively provided with a first air inlet for the first working chamber and a second air inlet for the second working chamber. The first air inlet and the second air inlet are respectively connected to the first oil inlet connected to the first working chamber and the second oil inlet connected to the second working chamber on the hydraulic clutch, as well as the impact pipeline and the detection pipeline corresponding to the working chamber outside the closed container.

[0015] Preferably, the airtightness detection system further comprises a sealed container, on which a second connection seat is provided, on which a first connection head for the first working chamber and a second connection head for the second working chamber are provided, and the first connection head and the second connection head are respectively connected to the impact pipeline and the detection pipeline of the corresponding working chamber;

[0016] In the working state, the hydraulic clutch to be tested is enclosed in a sealed container, the first connector is communicated with the first working chamber of the hydraulic clutch to be tested, and the second connector is communicated with the second working chamber of the hydraulic clutch to be tested.

[0017] Preferably, a second pressure gauge and a second pressure transmitter are provided on the sealed container, and the second pressure transmitter is connected to the controller signal.

[0018] Preferably, a weighing sensor is provided below the sealed container, and the weighing sensor is connected to the controller signal.

[0019] Preferably, the airflow regulating and detecting device comprises one or more of a filter, a throttle, a pressure regulating valve, an air source triplet, and a flow meter.

[0020] Preferably, the controller is a PLC controller.

[0021] The present application also provides a method for detecting the air tightness of a hydraulic clutch, comprising:

[0022] One of the pneumatic impact valves is controlled to be energized at high frequency, and the impact pipeline is connected, so that the compressed air enters the corresponding working chamber of the hydraulic clutch being tested through the pneumatic impact valve and the one-way valve;

[0023] The pneumatic impact valve is controlled to lose power and be energized according to a preset time interval and a preset number of vibrations, and the pneumatic impact valve is controlled to lose power after the preset number of vibrations is reached;

[0024] The solenoid valve corresponding to the control working chamber is energized, and the detection pipeline is connected, so that the compressed air enters the corresponding working chamber of the hydraulic clutch being detected through the airflow adjustment and detection device and the solenoid valve;

[0025] When the pressure in the working chamber reaches the preset value, the solenoid valve is powered off and the working chamber enters a pressure-maintaining state;

[0026] After the preset pressure holding time, the leakage of the working chamber is calculated, and the air tightness test result of the working chamber is obtained based on the leakage.

[0027] Preferably, calculating the leakage amount includes:

[0028] Calculate the leakage amount based on the change in the first pressure gauge at the end of pressure maintenance.

[0029] Preferably, calculating the leakage amount includes:

[0030] Calculate the leakage amount based on the change in the second pressure gauge at the end of pressure maintenance.

[0031] Preferably, after the air tightness test of one working chamber is completed, the air tightness test of another working chamber is automatically controlled.

[0032] Preferably, calculating the leakage amount includes:

[0033] The leakage amount is calculated based on the change in the value of the weighing sensor at the end of pressure maintenance.

[0034] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0036] Figure 1 A schematic diagram of the air tightness detection system of the hydraulic clutch provided in this application;

[0037] Figure 2 The structural principle diagram of the air tightness detection system used in the production site provided for this application;

[0038] Figure 3 for Figure 2 A structural diagram of the first connecting socket;

[0039] Figure 4 A structural principle diagram of an embodiment of an airtightness detection system for laboratory use provided by the present application;

[0040] Figure 5A structural principle diagram of an embodiment of an airtightness detection system for laboratory use provided in this application. DETAILED DESCRIPTION

[0041] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, 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 application.

[0042] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0043] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0044] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0045] The present application provides a hydraulic clutch air tightness detection system and method, which uses compressed air instead of oil to perform factory testing of the hydraulic clutch, thereby reducing testing costs, reducing pollution and consumption, and making maintenance easier.

[0046] like Figure 1 As shown, the hydraulic clutch 50 under test has a first working chamber 501 corresponding to the forward gear piston of the forklift and a second working chamber 502 corresponding to the reverse gear piston of the forklift. The ends of the forward gear piston and the reverse gear piston are both provided with sealing rings, which play a key role in the sealing of the working chambers.

[0047] like Figure 1 As shown, the air tightness detection system of the hydraulic clutch provided in the present application includes a controller (not shown in the figure) and a detection pipeline connected to each working chamber of the hydraulic clutch 50.

[0048] The detection pipeline includes a detection main pipe shared by two working chambers and a detection branch pipe arranged between the detection main pipe and the corresponding working chamber. The other end of the detection main pipe is connected to the gas source, and the detection main pipe is provided with an air flow adjustment and detection device, a first pressure gauge and a first pressure transmitter. The detection branch pipe is provided with a solenoid valve.

[0049] The controller is connected to the actuator and detection element signals on the detection pipeline, that is, the controller is connected to the first pressure transmitter, the actuator and solenoid valve signals in the airflow regulation and detection device. The first pressure transmitter is used to convert the gas pressure in the detection pipeline into a pneumatic signal or an electric signal and transmit it to the controller. The controller controls the actuator and solenoid valve in the airflow regulation and detection device to operate according to the pressure signal.

[0050] The airflow regulating and detecting device includes one or more of a filter, a throttle, a pressure regulating valve, an air source triplet, and a flow meter. Figure 1 In the illustrated embodiment, the airflow regulating and detecting device on the detection main pipe includes a filter 15, a precision pressure regulating valve 16 and a flow meter 18, a first pressure gauge 17 is arranged between the precision pressure regulating valve 16 and the flow meter 18, and a first pressure transmitter 19 is arranged downstream of the flow meter 18.

[0051] exist Figure 1 In the illustrated embodiment, a first two-way solenoid valve 14 is provided on the detection branch corresponding to the first working chamber 501 , and a second two-way solenoid valve 13 is provided on the detection branch corresponding to the second working chamber 502 .

[0052] Preferably, the air tightness detection system further comprises an impact pipeline, the other end of which is connected to the gas source 60, and the actuator on the impact pipeline is connected to the controller signal. As an embodiment, a one-way valve and a pneumatic impact valve are provided on the impact pipeline, the controller is connected to the pneumatic impact valve signal, and the controller controls the pneumatic impact valve to operate according to the pressure signal in the impact pipeline.

[0053] Figure 1 In the illustrated embodiment, for the first working chamber 501, the corresponding impact pipeline includes a first pneumatic impact valve 12 and a one-way valve between the gas source 60 and the gas inlet of the first working chamber 501. For the second working chamber 502, the corresponding impact pipeline includes a second pneumatic impact valve 11 and a one-way valve between the gas source 60 and the gas inlet of the second working chamber 502.

[0054] Based on the above preferred embodiment, the air tightness detection method of the hydraulic clutch executed by the controller includes:

[0055] P1: Control one of the pneumatic impact valves (e.g. 12) to be energized at high frequency, and the impact pipeline is turned on, so that the compressed air enters the corresponding working chamber (e.g. the first working chamber 501) of the hydraulic clutch being tested through the pneumatic impact valve and the one-way valve, thereby pushing the piston (e.g. the forward gear piston) to move to another working chamber.

[0056] P2: The pneumatic impact valve is controlled to be powered on and off according to the preset time interval and the preset number of vibrations. After the preset number of vibrations is reached, the pneumatic impact valve is controlled to be powered off.

[0057] Specifically, the pneumatic impact valve is powered on for a first preset time (e.g., 100-1000ms) and then de-energized for a second preset time. Due to the presence of leakage, the gas pressure filled in the working chamber is reduced, and the piston returns under the action of the return spring, thereby the piston performs one reciprocating movement. The controller energizes and de-energizes the pneumatic impact valve at a high frequency cycle, so that the piston moves left and right at a high frequency to generate vibration, so that the sealing ring on the piston fits more closely with the piston rod, thereby improving the sealing performance and reducing the leakage.

[0058] P3: After completing the high-frequency vibration, the solenoid valve (e.g., the first two-way solenoid valve 14) corresponding to the control working chamber (e.g., the first working chamber) is energized, and the detection pipeline is connected, so that the compressed air flows into the throttle, and then enters the corresponding working chamber of the hydraulic clutch being detected through the solenoid valve after the throttling action of the throttle, so that the pressure in the working chamber increases.

[0059] P4: When the pressure in the working chamber reaches the preset value, the solenoid valve is powered off and the working chamber enters the pressure-maintaining state. During the pressure-maintaining process, the pressure in the working chamber decreases due to leakage.

[0060] P5: After the preset pressure holding time, the leakage of the working chamber is calculated, and the air tightness test result of the working chamber is obtained based on the leakage, thereby completing the air tightness test of one of the working chambers. If the leakage is less than the threshold, the air tightness is qualified; otherwise, the air tightness is unqualified.

[0061] Preferably, the controller is a PLC controller. After the air tightness test of one working chamber is completed, the PLC controller automatically controls the air tightness test system to perform air tightness test on another working chamber according to the above steps, thereby realizing fully automatic air tightness test.

[0062] As an embodiment, the air tightness detection system is installed at the production site, and its structure is as follows: Figure 2 As shown, on the basis of the above, the air tightness detection system also includes a sliding frame 21 erected above the clutch production line, a first connecting seat 23 suspended below the sliding frame 21, and a detection box (not shown in the figure) separately arranged from the first connecting seat 23. A balancer 22 is provided on the rope between the sliding frame 21 and the first connecting seat 23. The sliding frame 21 includes a transverse slide rail and a longitudinal slide rail, and the first connecting seat 23 can slide in the longitudinal and transverse directions to move the first connecting seat 23 to the top of the hydraulic clutch output by the production line for easy detection. A pipeline connected to the air source 60, a part of the detection pipeline and a part of the impact pipeline are provided in the detection box, and a one-way valve, an airflow adjustment and detection device and an electromagnetic valve are arranged in the detection box.

[0063] The first connecting seat is provided with a first air inlet for the first working chamber and a second air inlet for the second working chamber. The first air inlet and the second air inlet are respectively connected to the impact pipeline and the detection pipeline of the corresponding working chamber.

[0064] As an example, Figure 3 As shown, a slot 239 connected to the end of the hydraulic clutch is provided at the lower portion of the first connecting seat 23, and a first air inlet 233 and a second air inlet 234 are respectively provided on two opposite side walls of the slot.

[0065] A part of the detection pipeline for the first working chamber and the second working chamber is respectively provided on the first connection seat 23 and in the detection box body, and the detection pipeline for the first working chamber and the second working chamber on the first connection seat 23 is connected with the first air inlet and the second air inlet respectively. Specifically, a horizontal first pipeline 236 is provided between the first air inlet 233 and the left side wall of the first connection seat 23, and a first connection port 237 is formed at the end of the first pipeline 236. The first connection port 237 is connected to the corresponding first two-way solenoid valve 14 in the detection box body through a connector and a gas pipeline to form a detection pipeline for the first working chamber.

[0066] A part of the impact pipeline for the first working chamber and the second working chamber is respectively provided on the first connecting seat 23 and in the detection box body, and the impact pipeline in the detection box body is connected to the compressed air source outside the detection box body. Specifically, a vertical second pipe 235 is provided at the left end of the upper side wall of the first connecting seat 23, and the middle part of the second pipe 235 is interconnected with the middle part of the first pipe 236. The upper end of the second pipe 235 is provided with a second connecting port 231, and the second connecting port 231 is connected to the first pneumatic impact valve 12, so that the second pipe 235 and the first pipe 236 constitute a part of the impact pipeline for the first working chamber. The first pneumatic impact valve 12 is connected to the air source 60 through the pipe outside the detection box body and the impact pipe inside the detection box body in turn.

[0067] An impact pipeline and a detection pipeline connected to the second working chamber are symmetrically provided at the right end portion of the upper side wall of the first connecting seat 23 .

[0068] In the working state, one end of the oil inlet (including a first oil inlet connected to the first working chamber and a second oil inlet connected to the second working chamber, and the oil inlet in the present application is used for air intake) on the hydraulic clutch being tested is inserted into the slot of the first connecting seat, so that the first air inlet is aligned with the first oil inlet of the hydraulic clutch, and the second air inlet is aligned with the second oil inlet of the hydraulic clutch, so that the first air inlet is connected to the first working chamber of the hydraulic clutch being tested, and the second air inlet is connected to the second working chamber of the hydraulic clutch being tested, so that the impact pipeline and the detection pipeline of the first working chamber are connected to the first working chamber of the hydraulic clutch being tested, and the impact pipeline and the detection pipeline of the second working chamber are connected to the second working chamber of the hydraulic clutch being tested.

[0069] In this embodiment, when calculating the leakage, the leakage is calculated based on the change value of the first pressure gauge 17 at the end of the pressure maintenance. As an embodiment, the ratio of the pressure change value to the pressure value at the beginning of the pressure maintenance is used as the leakage.

[0070] As another embodiment, the air tightness detection system of the hydraulic clutch is installed in a laboratory. The air tightness detection system further includes a sealed container of a fixed capacity, a second connection seat is provided on the sealed container, a first connector for the first working chamber and a second connector for the second working chamber are provided on the second connection seat, and the first connector and the second connector are respectively connected to the first oil inlet connected to the first working chamber and the second oil inlet connected to the second working chamber on the hydraulic clutch and the detection pipeline of the corresponding working chamber outside the sealed container.

[0071] As an example, based on the above, Figure 4 An example of an embodiment in a laboratory is shown. Figure 4 As shown, the sealed container 31 is provided with a second pressure gauge 33 and a second pressure transmitter 32, and the second pressure transmitter 32 is connected to the controller signal. The airflow adjustment and detection device on the detection main pipe includes an air source triplet 34, a precision pressure regulating valve 35 and a fixed throttle 38, and the third pressure gauge 36 and the third pressure transmitter 37 are arranged between the precision pressure regulating valve 35 and the fixed throttle 38.

[0072] In this embodiment, the solenoid valve is a three-position five-way reversing valve. Specifically, a three-position five-way reversing valve is provided at the end of the detection main pipe, and its first position and second position are respectively connected to the ends of two detection branch pipes, and the other ends of the two detection branch pipes are respectively connected to the first connector and the second connector. When the three-position five-way reversing valve is in the third position, both detection branch pipes are not conductive. In this embodiment, when the detection pipeline is used for detection, the controller controls the three-position five-way reversing valve to operate, so that the detection pipeline of the target working chamber is opened, and compressed air is injected into the target working chamber (please see the above about Figure 1), after the pressure of the gas in the working chamber reaches the preset value, the pressure holding test begins. Due to the leakage of the clutch, during the pressure holding process, the gas in the hydraulic clutch leaks into the closed container, causing the pressure value in the closed container to gradually increase, and the value of the second pressure gauge 33 changes. When calculating the leakage amount, the leakage amount is calculated based on the change value of the second pressure gauge 33 at the end of the pressure holding.

[0073] Preferably, Figure 4 Based on the embodiment shown, an impact pipeline for the first working chamber and an impact pipeline for the second working chamber are respectively provided between the first connector and the gas source 60 and between the second connector and the gas source 60, and a one-way valve and a pneumatic impact valve are provided on the impact pipeline. The impact vibration principle is described in the above description. Figure 1 Description.

[0074] As another example, the airtightness detection system in the laboratory is as follows: Figure 5 As shown, the sealed container 41 is provided with a second pressure gauge 42 and a second pressure transmitter 43, and the second pressure transmitter 43 is connected to the controller signal. Among them, the airflow regulation and detection device on the detection main pipe includes an air source triplet 45, a precision pressure regulating valve 46 and a fixed throttle 49, and the fourth pressure gauge 47 and the fourth pressure transmitter 48 are arranged between the precision pressure regulating valve 46 and the fixed throttle 49. A three-position five-way reversing valve is provided at the end of the detection main pipe, and its first position and second position are respectively connected to the ends of the two detection branches, and the other ends of the two detection branches are respectively connected to the first connector and the second connector. When the three-position five-way reversing valve is in the third position, the two detection branches are not conductive. On this basis, a weighing sensor 44 is provided under the sealed container 41, and the weighing sensor 44 is connected to the controller signal. In this embodiment, when the detection pipeline is used for detection, the controller controls the three-position five-way reversing valve to operate, so that the detection pipeline of the target working chamber is opened, and compressed air is injected into the target working chamber (please see the above about Figure 1 (Instructions for use), after the pressure of the gas in the working chamber reaches the preset value, the pressure maintenance test begins. Due to the leakage of the clutch, during the pressure maintenance process, the gas in the hydraulic clutch leaks into the closed container, causing the pressure value in the closed container to gradually increase, the total mass of the air in the closed container to gradually increase, and the mass value detected by the weighing sensor 44 to gradually increase. When calculating the leakage amount, the leakage amount is calculated based on the change value of the weighing sensor 44 at the end of the pressure maintenance.

[0075] Preferably, Figure 5 Based on the embodiment shown, an impact pipeline for the first working chamber and an impact pipeline for the second working chamber are respectively provided between the first connector and the gas source 60 and between the second connector and the gas source 60, and a one-way valve and a pneumatic impact valve are provided on the impact pipeline. The impact vibration principle is described in the above description. Figure 1 Description.

[0076] The beneficial effects of this application are as follows:

[0077] 1. The power consumption of the instrument is less than 100 watts, and there is no electricity consumption; the compressed air consumption is about 100L / unit, which can be ignored. No oil is consumed during the test, and there is no need to regularly replace, replenish, or purify the oil, which reduces the cost of test oil and oil purification consumables, realizes clean production of hydraulic clutch factory inspection, eliminates the oil draining process required for oil testing, avoids site pollution and production line pollution caused by oil testing, and reduces the maintenance workload of instruments and equipment.

[0078] 2. Good appearance: The air tightness detection system arranged at the production site is arranged at the edge of the production line. The detection box is small in size and occupies an area of ​​about 0.5 square meters. The connecting seat is installed in a suspended manner, which does not occupy any area and improves the image of the workshop production line operation.

[0079] 3. Low labor intensity: In the implementation example at the production site, when the completed clutch flows to the inspection station, the operator pulls down the test tooling and inserts the tested clutch, and presses the test button to complete the test. There is no need to transport the clutch to the inspection site outside the production line, which greatly reduces labor intensity.

[0080] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A hydraulic clutch air tightness detection system, characterized in that: It includes a controller, an impact pipeline and a detection pipeline connected to each working chamber of the hydraulic clutch; The other end of the impact pipeline is connected to the air source, and a one-way valve and a pneumatic impact valve are provided on the impact pipeline; The detection pipeline includes a detection main pipe shared by two working chambers and a detection branch pipe arranged between the detection main pipe and the corresponding working chamber; the other end of the detection main pipe is connected to the gas source, the detection main pipe is provided with an airflow adjustment and detection device, a first pressure gauge and a first pressure transmitter, and the detection branch pipe is provided with a solenoid valve; The controller is connected to the first pressure transmitter, the pneumatic impact valve, the actuator of the airflow regulating and detecting device and the solenoid valve signal.

2. The air tightness detection system of the hydraulic clutch according to claim 1, characterized in that: The air tightness detection system further comprises a sliding frame mounted above the clutch production line, a first connecting seat suspended below the sliding frame, and a detection box body separated from the first connecting seat; The first connecting seat is provided with a slot connected to the end of the hydraulic clutch, and two opposite side walls of the slot are respectively provided with a first air inlet for the first working chamber and a second air inlet for the second working chamber, and the first air inlet and the second air inlet are respectively communicated with an impact pipeline and a detection pipeline of the corresponding working chamber; In the working state, the first air inlet is communicated with the first working chamber of the hydraulic clutch being tested, and the second air inlet is communicated with the second working chamber of the hydraulic clutch being tested.

3. The air tightness detection system of the hydraulic clutch according to claim 1, characterized in that: The airtightness detection system also includes a closed container, which is provided with a second connecting seat, and the second connecting seat is provided with a first connecting head for the first working chamber and a second connecting head for the second working chamber, the first connecting head and the second connecting head are respectively connected to the first oil inlet connected to the first working chamber and the second oil inlet connected to the second working chamber on the hydraulic clutch, as well as the impact pipeline and the detection pipeline corresponding to the working chamber outside the closed container.

4. The air tightness detection system of the hydraulic clutch according to claim 3, characterized in that: The sealed container is provided with a second pressure gauge and a second pressure transmitter, and the second pressure transmitter is connected to the controller signal.

5. The air tightness detection system of the hydraulic clutch according to claim 1, characterized in that: The airflow regulating and detecting device includes one or more of a filter, a throttle, a pressure regulating valve, an air source triplet, and a flow meter.

6. The air tightness detection system of the hydraulic clutch according to claim 1, characterized in that: The controller is a PLC controller.

7. A method for detecting air tightness of a hydraulic clutch of an air tightness detection system of a hydraulic clutch according to any one of claims 1 to 6, characterized in that: include: One of the pneumatic impact valves is controlled to be energized at high frequency, and the impact pipeline is connected, so that the compressed air enters the corresponding working chamber of the hydraulic clutch being tested through the pneumatic impact valve and the one-way valve; Controlling the pneumatic impact valve to lose power and gain power according to a preset time interval and a preset number of vibrations, and controlling the pneumatic impact valve to lose power after the preset number of vibrations is reached; Controlling the electromagnetic valve corresponding to the working chamber to be energized and the detection pipeline to be connected, so that the compressed air enters the corresponding working chamber of the hydraulic clutch being detected through the airflow adjustment and detection device and the electromagnetic valve; After the pressure in the working chamber reaches a preset value, the solenoid valve is controlled to be powered off, and the working chamber enters a pressure-maintaining state; After the preset pressure holding time, the leakage of the working chamber is calculated, and the air tightness test result of the working chamber is obtained according to the leakage.

8. The method for detecting air tightness of a hydraulic clutch according to claim 7, characterized in that: Calculate leakage, including: The leakage amount is calculated according to the change value of the first pressure gauge at the end of the pressure maintenance.

9. The method for detecting air tightness of a hydraulic clutch according to claim 7, characterized in that: Calculate leakage, including: The leakage amount is calculated according to the change value of the second pressure gauge at the end of the pressure maintenance.

10. The method for detecting air tightness of a hydraulic clutch according to claim 7, characterized in that: After one of the working chambers completes the air tightness test, the air tightness test of the other working chamber is automatically controlled.

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