Air tightness detection system of hydraulic clutch

Abstract

The utility model discloses an air tightness detection system of a hydraulic clutch. The air tightness detection system comprises a controller, a sliding frame, a connecting seat and a detection box body, a slot connected with the end part of the hydraulic clutch is formed in the connecting seat; a first air inlet communicated with the first working cavity and a second air inlet communicated with the second working cavity are respectively formed in two opposite side walls of the slot; a part of detection pipelines for the first working cavity and the second working cavity are respectively arranged on the connecting seat and in the detection box body, the detection pipeline in the detection box body is connected with a compressed air source outside the detection box body, and the detection pipelines for the first working cavity and the second working cavity on the connecting seat are respectively communicated with the first air inlet and the second air inlet; and the controller is in signal connection with the execution element and the detection element on the detection pipeline. The air tightness detection system is arranged at the edge of the production line, and compressed air is adopted to replace oil, so that the test cost is reduced, pollution and consumption are reduced, and the labor intensity is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engineering machinery, and more particularly, to an air tightness detection system of a hydraulic clutch. BACKGROUND

[0002] As a main part in the hydraulic transmission box of a forklift, the hydraulic clutch is directly related to the performance of the transmission system of the whole vehicle and is an important part for ensuring the reliable operation of the whole vehicle.

[0003] The current factory test of the hydraulic clutch of a forklift is carried out by using a hydraulic pump station. In a static state, pressure oil with a constant pressure and flow rate is introduced into the working cavity of the hydraulic clutch, and the pressure that can be established by the forward gear and the reverse gear of the clutch under the constant flow rate and constant pressure is detected to determine whether the sealing performance of the clutch meets the requirements.

[0004] The hydraulic pump test method has the following problems:

[0005] 1) High test cost: The oil product is prone to contamination, and the test oil product needs to be replaced, supplemented and purified regularly, which increases the cost of oil product procurement and the cost of oil purification machine consumables and causes energy waste;

[0006] 2) Easy to cause pollution: The residual oil in the clutch after the test cannot be completely drained, which is easy to cause oil pollution on the transmission box assembly line;

[0007] 3) The oil pressure test bench occupies a large area, affects the overall process layout of the workshop, and is difficult to maintain and repair;

[0008] 4) High labor intensity: The tester needs to move the clutch to the test bench during the test, and still needs to move it to the oil draining tank for oil draining treatment after the test. CONTENT OF THE INVENTION

[0009] The present application provides an air tightness detection system of a hydraulic clutch, which is arranged at the edge of the production line and uses compressed air and gas pipelines to replace oil products for the factory test of the hydraulic clutch, thereby reducing the test cost, reducing pollution and consumption, being easy to maintain and repair, and being capable of being detected without moving, thereby reducing the labor intensity.

[0010] The present application provides an air tightness detection system of a hydraulic clutch, which comprises a controller, a sliding frame arranged above the clutch production line, a connecting seat hung below the sliding frame, and a detection box body arranged separately from the connecting seat;

[0011] The connecting seat is provided with a slot connected with the end of the hydraulic clutch, and the opposite two side walls of the slot are respectively provided with a first air inlet communicated with the first working cavity and a second air inlet communicated with the second working cavity;

[0012] The connecting seat and the detection box are respectively provided with a part of detection pipelines for the first working chamber and the second working chamber, the detection pipelines in the detection box are connected with the compressed air source outside the detection box, and the detection pipelines on the connecting seat for the first working chamber and the second working chamber are respectively communicated with the first gas inlet and the second gas inlet;

[0013] The controller is signal connected with the executing element and the detection element on the detection pipeline.

[0014] Preferably, the connecting seat and the detection box are respectively provided with a part of impact pipelines for the first working chamber and the second working chamber, and the impact pipelines in the detection box are connected with the compressed air source outside the detection box.

[0015] The executing element on the impact pipeline is signal connected with the controller.

[0016] Preferably, the impact pipeline is provided with a one-way valve and a pneumatic impact valve, and the pneumatic impact valve is signal connected with the controller.

[0017] Preferably, the detection pipeline comprises a detection main pipeline shared by the two working chambers and a detection branch pipeline arranged between the detection main pipeline and the corresponding working chamber.

[0018] Part of the detection main pipeline and the detection branch pipeline are arranged in the detection box, the other end of the detection main pipeline is connected with the compressed air source, and the other part of the detection branch pipeline is arranged in the connecting seat and between the connecting seat and the detection box.

[0019] The detection main pipeline is provided with airflow adjusting and detecting devices, a pressure gauge and a pressure transmitter, and the detection branch pipeline is provided with two-way electromagnetic valves.

[0020] The controller is signal connected with the pressure transmitter, the executing element of the airflow adjusting and detecting devices and the two-way electromagnetic valves.

[0021] Preferably, the airflow adjusting and detecting devices comprise one or more of a filter, a flow restrictor, a pressure regulating valve, a compressed air source three-in-one component and a flowmeter.

[0022] Preferably, a balancer is arranged on the rope between the sliding frame and the connecting seat.

[0023] Preferably, a horizontal first pipeline is arranged between the first gas inlet and the left side wall of the connecting seat, a first connecting port is formed at the end of the first pipeline, the first connecting port is connected with the corresponding first two-way electromagnetic valve in the detection box through a connecting head and a gas pipeline, and the detection pipeline for the first working chamber is formed.

[0024] Preferably, the left end of the upper side wall of the connecting seat is provided with a vertical second pipeline, the middle part of the second pipeline is in communication with the middle part of the first pipeline, and the upper end of the second pipeline is provided with a second connecting port, the second connecting port is connected with the first pneumatic impact valve, so that the second pipeline and the first pipeline constitute part of the impact pipeline for the first working chamber.

[0025] The first pneumatic impact valve is connected with the compressed air source through the pipeline outside the detection box and the pipeline inside the detection box.

[0026] Other features and advantages of the present application will become apparent from the following detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings incorporated in and forming a part of the specification illustrate embodiments of the present application and, together with the description, serve to explain the principles of the application.

[0028] Figure 1 The schematic diagram of the air tightness detection system of the hydraulic clutch provided by the present application;

[0029] Figure 2 The structural schematic diagram of the air tightness detection system used in the production site provided by the present application;

[0030] Figure 3 The structural schematic diagram of the air tightness detection system used in the production site provided by the present application; Figure 2 The structural diagram of the first connecting seat;

[0031] Figure 4 The structural schematic diagram of one embodiment of the air tightness detection system used in the laboratory provided by the present application;

[0032] Figure 5 The structural schematic diagram of one embodiment of the air tightness detection system used in the laboratory provided by the present application. DETAILED DESCRIPTION

[0033] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0034] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.

[0035] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art can not be discussed in detail herein. However, where appropriate, such techniques, methods, and apparatus can be considered as part of the description of the present application.

[0036] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary, and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0037] The application provides a kind of hydraulic clutch airtightness detection system, airtightness detection system is arranged at the edge of production line, and compressed air and gas pipeline are used to replace oil product to carry out factory test of hydraulic clutch, reduce test cost, reduce pollution and consumption, maintenance is easier, and detection can be carried out without carrying, reduce the intensity of human labor.

[0038] As Figure 1 Indicated, the hydraulic clutch 50 to be detected has the first working chamber 501 corresponding to the forward gear piston of the forklift and the second working chamber 502 corresponding to the reverse gear piston of the forklift, and the end of the forward gear piston and the reverse gear piston is provided with a sealing ring, which plays a key role in the sealing of the working chamber.

[0039] As Figure 1 Indicated, the application provides a kind of hydraulic clutch airtightness detection system, airtightness detection system is arranged at the edge of production line, and compressed air and gas pipeline are used to replace oil product to carry out factory test of hydraulic clutch, reduce test cost, reduce pollution and consumption, maintenance is easier, and detection can be carried out without carrying, reduce the intensity of human labor.

[0040] 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 with the gas source, and the detection main pipe is provided with a gas flow adjusting and detecting device, a first pressure gauge and a first pressure transmitter. The detection branch pipe is provided with a solenoid valve.

[0041] The controller is signal connected with the executing elements and detecting elements on the detection pipeline, that is, the controller is signal connected with the first pressure transmitter, the executing elements in the gas flow adjusting and detecting device and the solenoid valve, the first pressure transmitter is used to convert the gas pressure in the detection pipeline into pneumatic signal or electric signal and transmit to the controller, and the controller controls the executing elements in the gas flow adjusting and detecting device and the solenoid valve to act according to the pressure signal.

[0042] Among them, the gas flow adjusting and detecting device includes one or more of filter, restrictor, pressure regulating valve, gas source three-way joint and flowmeter. Figure 1 In the embodiment shown, the gas flow adjusting and detecting device on the detection main pipe includes filter 15, precision pressure regulating valve 16 and flowmeter 18, the first pressure gauge 17 is arranged between the precision pressure regulating valve 16 and the flowmeter 18, and the first pressure transmitter 19 is arranged downstream of the flowmeter 18.

[0043] In Figure 1In the embodiment shown, the first two-way electromagnetic valve 14 is arranged on the detection branch corresponding to the first working chamber 501, and the second two-way electromagnetic valve 13 is arranged on the detection branch corresponding to the second working chamber 502.

[0044] Preferably, the air tightness detection system further comprises an impact pipeline, one end of the impact pipeline is connected with the air source 60, and the actuator on the impact pipeline is connected with the controller in signal. As an embodiment, a one-way valve and a pneumatic impact valve are arranged on the impact pipeline, the controller is connected with the pneumatic impact valve in signal, and the controller controls the pneumatic impact valve to act according to the pressure signal in the impact pipeline.

[0045] Figure 1 In the embodiment shown, for the first working chamber 501, the impact pipeline corresponding thereto comprises the first pneumatic impact valve 12 and the one-way valve between the air source 60 and the air inlet of the first working chamber 501. For the second working chamber 502, the impact pipeline corresponding thereto comprises the second pneumatic impact valve 11 and the one-way valve between the air source 60 and the air inlet of the second working chamber 502.

[0046] Based on the above preferred embodiment, the air tightness detection method of the hydrodynamic clutch performed by the controller comprises the following steps:

[0047] P1: control one of the pneumatic impact valves (for example, 12) to be powered on at a high frequency, so that the impact pipeline is turned on, and the compressed air enters the corresponding working chamber (for example, the first working chamber 501) of the hydrodynamic clutch to be detected through the pneumatic impact valve and the one-way valve, thereby pushing the piston (for example, the forward gear piston) to move to the other working chamber.

[0048] P2: control the pneumatic impact valve to be powered on and powered off according to a preset time interval and a preset vibration number, and control the pneumatic impact valve to be powered off after the preset vibration number is reached.

[0049] Specifically, the pneumatic impact valve is powered on for a first preset time (for example, 100-1000 ms) and then powered off for a second preset time. Due to the existence of leakage, the gas pressure in the working chamber decreases, and the piston is returned under the action of the return spring, so that the piston realizes one reciprocation. By controlling the pneumatic impact valve to be powered on and powered off at a high frequency, the piston moves back and forth at a high frequency to generate vibration, so that the sealing ring on the piston is more tightly attached to the piston rod, thereby improving the sealing performance and reducing the leakage.

[0050] P3: after the high-frequency vibration is completed, control the electromagnetic valve (for example, the first two-way electromagnetic valve 14) corresponding to the working chamber (for example, the first working chamber) to be powered on, so that the detection pipeline is turned on, the compressed air flows into the restrictor, and then enters the corresponding working chamber of the hydrodynamic clutch to be detected through the electromagnetic valve after the throttling action of the restrictor, so that the pressure in the working chamber increases.

[0051] P4: After the pressure in the working chamber reaches the preset value, the electromagnetic valve is controlled to be powered off, and the working chamber enters a pressure maintaining state. During the pressure maintaining process, the pressure in the working chamber decreases due to the existence of leakage.

[0052] P5: After the preset pressure maintaining time, the leakage amount of the working chamber is calculated, and the air tightness detection result of the working chamber is obtained according to the leakage amount, so as to complete the air tightness detection of one working chamber. If the leakage amount is less than a threshold value, the sealing property is qualified; otherwise, the sealing property is unqualified.

[0053] Preferably, the controller is a PLC controller, which automatically controls the air tightness detection system to perform the air tightness detection on another working chamber according to the above steps after the air tightness detection of one working chamber is completed, so as to realize full-automatic air tightness detection.

[0054] As an embodiment, the air tightness detection system is installed on a production site, and its structure is shown in Figure 2 On the basis of the above, the air tightness detection system further comprises a sliding frame 21 arranged above the clutch production line, a first connecting seat 23 hung below the sliding frame 21, and a detection box (not shown in the figure) arranged separately from the first connecting seat 23. A balancer 22 is arranged on the rope between the sliding frame 21 and the first connecting seat 23. The sliding frame 21 comprises a transverse sliding rail and a longitudinal sliding 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 hydrodynamic clutch output from the production line, facilitating detection. The detection box is provided with a pipeline connected with the gas source 60, a part of the detection pipeline and a part of the impact pipeline, a one-way valve, a gas flow adjusting and detecting device and an electromagnetic valve arranged in the detection box.

[0055] The first connecting seat is provided with a first air inlet communicated with the first working chamber and a second air inlet communicated with the second working chamber, and the first air inlet and the second air inlet are respectively communicated with the impact pipeline and the detection pipeline of the corresponding working chamber.

[0056] As an embodiment, as shown in Figure 3 The lower part of the first connecting seat 23 is provided with a slot 239 connected with the end of the hydrodynamic clutch, and the opposite two side walls of the slot are respectively provided with a first air inlet 233 and a second air inlet 234.

[0057] The first connecting seat 23 and the detection box are respectively provided with a part of the detection pipeline for the first working chamber and the second working chamber, and the detection pipeline for the first working chamber and the second working chamber on the first connecting seat 23 respectively communicates with the first gas inlet and the second gas inlet. Specifically, the first gas inlet 233 and the left side wall of the first connecting seat 23 are provided with a horizontal first pipeline 236, and the port of the first pipeline 236 forms a first connecting port 237. The first connecting port 237 is connected with the corresponding first two-way electromagnetic valve 14 in the detection box through a connecting head and a gas pipeline, thereby forming the detection pipeline for the first working chamber.

[0058] The first connecting seat 23 and the detection box are respectively provided with a part of the detection pipeline for the first working chamber and the second working chamber, and the detection pipeline for the first working chamber and the second working chamber on the first connecting seat 23 respectively communicates with the first gas inlet and the second gas inlet. Specifically, the first gas inlet 233 and the left side wall of the first connecting seat 23 are provided with a horizontal first pipeline 236, and the port of the first pipeline 236 forms a first connecting port 237. The first connecting port 237 is connected with the corresponding first two-way electromagnetic valve 14 in the detection box through a connecting head and a gas pipeline, thereby forming the detection pipeline for the first working chamber.

[0059] The right end of the upper side wall of the first connecting seat 23 is symmetrically provided with the impact pipeline and the detection pipeline connected with the second working chamber.

[0060] In the working state, one end of the oil inlet (including the first oil inlet connected with the first working chamber and the second oil inlet connected with the second working chamber, and the oil inlet is used for air inlet in the present application) of the detected hydrodynamic clutch is inserted into the slot of the first connecting seat, so that the first gas inlet is aligned with the first oil inlet of the hydrodynamic clutch, and the second gas inlet is aligned with the second oil inlet of the hydrodynamic clutch, so that the first gas inlet communicates with the first working chamber of the detected hydrodynamic clutch, and the second gas inlet communicates with the second working chamber of the detected hydrodynamic clutch, thereby making the impact pipeline and the detection pipeline of the first working chamber communicate with the first working chamber of the detected hydrodynamic clutch, and the impact pipeline and the detection pipeline of the second working chamber communicate with the second working chamber of the detected hydrodynamic clutch.

[0061] In this embodiment, when calculating the leakage amount, the leakage amount is calculated according to the change value of the first pressure gauge 17 at the end of pressure maintaining. As an example, the ratio of the pressure change value to the pressure value at the beginning of pressure maintaining is taken as the leakage amount.

[0062] As another embodiment, the air tightness detection system of the hydraulic clutch is installed in a laboratory. The air tightness detection system further comprises a constant-volume sealed container, the sealed container is provided with a second connecting seat, 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 communicated with the first oil inlet communicated with the first working chamber and the second oil inlet communicated with the second working chamber of the hydraulic clutch and the detection pipeline corresponding to the working chamber outside the sealed container.

[0063] As an embodiment, based on the above, Figure 4 An embodiment in a laboratory is shown. As shown in Figure 4 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 signal-connected with the controller. The airflow adjustment and detection device on the detection main pipe comprises an air source triplet 34, a precision pressure regulating valve 35 and a fixed restrictor 38, and a third pressure gauge 36 and a third pressure transmitter 37 are arranged between the precision pressure regulating valve 35 and the fixed restrictor 38.

[0064] In this embodiment, the electromagnetic valve is a three-position five-way directional valve. Specifically, the end of the detection main pipe is provided with a three-position five-way directional valve, the first position and the second position of which are respectively connected with the ends of the two detection branch pipes, and the other ends of the two detection branch pipes are respectively connected with the first connecting head and the second connecting head. When the three-position five-way directional valve is in the third position, neither of the two detection branch pipes is open. In this embodiment, when detection is carried out by using the detection pipeline, the controller controls the three-position five-way directional valve to act, so that the detection pipeline of the target working chamber is opened and compressed air is injected into the target working chamber (see the above description about Figure 1 When the pressure of the gas in the working chamber reaches the preset value, the pressure maintaining detection is started. Due to the leakage of the clutch, the gas in the hydraulic clutch leaks into the sealed container during the pressure maintaining process, so that the pressure value in the sealed container gradually increases and the value of the second pressure gauge 33 changes. When calculating the leakage amount, the leakage amount is calculated according to the change value of the second pressure gauge 33 at the end of the pressure maintaining.

[0065] Preferably, based on the embodiment shown in Figure 4 The first connecting head and the second connecting head are respectively provided with an impact pipeline for the first working chamber and an impact pipeline for the second working chamber between the first connecting head and the air source 60 and between the second connecting head and the air source 60, and the impact pipeline is provided with a one-way valve and a pneumatic impact valve. The impact vibration principle is described above in relation to Figure 1 .

[0066] As another embodiment, the air tightness detection system in the laboratory is shown in Figure 5As shown, a second pressure gauge 42 and a second pressure transmitter 43 are provided on the sealed container 41, and the second pressure transmitter 43 is connected to the controller signal. 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. A fourth pressure gauge 47 and a fourth pressure transmitter 48 are positioned between the precision pressure regulating valve 46 and the fixed throttle 49. A three-position five-way directional valve is provided at the end of the detection main pipe. Its first and second positions 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 a first connector and a second connector. When the three-position five-way directional valve is in the third position, neither detection branch pipe is conductive. Furthermore, a weighing sensor 44 is provided below the sealed container 41, and the weighing sensor 44 is connected to the controller signal. In this embodiment, when using the detection pipeline for detection, the controller controls the three-position five-way directional valve to open the detection pipeline of the target working chamber, injecting compressed air into the target working chamber (see above regarding...). Figure 1 (As explained), after the gas pressure in the working chamber reaches the preset value, pressure holding detection begins. Due to clutch leakage, during the pressure holding process, gas leaks from the hydraulic clutch into the sealed container, causing the pressure value in the sealed container to gradually increase, the total mass of air in the sealed 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 holding process.

[0067] Preferably, in Figure 5 Based on the illustrated embodiment, 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 air source 60 and between the second connector and the air source 60. These impact pipelines are equipped with a one-way valve and a pneumatic impact valve. The impact vibration principle is explained in the above description. Figure 1 Explanation.

[0068] The beneficial effects of this application are as follows:

[0069] 1. The instrument consumes less than 100 watts, with no electrical energy consumption; compressed air consumption is approximately 100L per unit, which is negligible. There is no oil consumption during the test, eliminating the need for regular oil replacement, replenishment, and purification. This reduces the cost of test oil and oil purification consumables, enabling clean production for hydraulic clutch factory testing. Furthermore, it eliminates the oil draining process required for oil testing, avoiding site and production line contamination caused by oil testing, and also reduces the workload of instrument maintenance.

[0070] 2. Good appearance: The airtightness testing system is set up at the edge of the production line. The testing box is small in size, occupying an area of ​​about 0.5㎡. The connecting seat adopts a hanging installation, which does not occupy any space and improves the appearance of the workshop production line.

[0071] 3. Low labor intensity: in the embodiment of the production site, when the finished clutch flows to the detection station, the operator pulls down the test tool to cover the tested clutch, presses the test button to complete the test, without the need to carry the clutch to the detection site outside the production line, greatly reducing the labor intensity.

[0072] Although some specific embodiments of the present application have been described in detail by examples, those skilled in the art should understand that the above examples are only for illustration, not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can 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 system for detecting air tightness of a hydraulic clutch, characterized by, The controller, a sliding frame arranged above a clutch production line, a connecting seat arranged below the sliding frame, and a detection box arranged separately from the connecting seat; The connecting seat is provided with a slot connected with the end of the hydraulic clutch, and opposite two side walls of the slot are respectively provided with a first air inlet communicated with the first working cavity and a second air inlet communicated with the second working cavity; The connecting seat and the detection box are respectively provided with a part of the detection pipeline for the first working cavity and the second working cavity, the detection pipeline in the detection box is connected with the compressed air source outside the detection box, and the detection pipeline on the connecting seat for the first working cavity and the second working cavity is respectively communicated with the first air inlet and the second air inlet; The controller is signal connected with the execution element and the detection element on the detection pipeline.

2. The system for detecting air tightness of a hydraulic clutch according to claim 1, wherein The connecting seat and the detection box are respectively provided with a part of the impact pipeline for the first working cavity and the second working cavity, and the impact pipeline in the detection box is connected with the compressed air source outside the detection box. The execution element on the impact pipeline is signal connected with the controller.

3. The system for detecting air tightness of a hydraulic clutch according to claim 2, wherein The impact pipeline is provided with a one-way valve and a pneumatic impact valve, and the pneumatic impact valve is signal connected with the controller.

4. The system for detecting air tightness of a hydraulic clutch according to claim 3, wherein The detection pipeline includes a detection main pipe shared by two working cavities and a detection branch pipe arranged between the detection main pipe and the corresponding working cavity. Part of the detection main pipe and the detection branch pipe are arranged in the detection box, the other end of the detection main pipe is connected with the compressed air source, and the other part of the detection branch pipe is arranged in the connecting seat and between the connecting seat and the detection box. The detection main pipe is provided with airflow adjusting and detecting devices, a pressure gauge and a pressure transmitter, and the detection branch pipe is provided with two-way electromagnetic valves. The controller is signal connected with the pressure transmitter, the execution element of the airflow adjusting and detecting devices and the two-way electromagnetic valves.

5. The system for detecting air tightness of a hydraulic clutch according to claim 4, wherein The airflow adjusting and detecting devices include one or more of a filter, a flow restrictor, a pressure regulating valve, a compressed air source three-in-one component and a flowmeter.

6. The system for detecting air tightness of a hydraulic clutch according to claim 1, wherein A balancer is arranged on the rope between the sliding frame and the connecting seat.

7. The system for detecting air tightness of a hydraulic clutch according to claim 4, wherein A horizontal first pipeline is arranged between the first air inlet and the left side wall of the connecting seat, a first connecting port is formed at the port of the first pipeline, the first connecting port is connected with the corresponding first two-way electromagnetic valve in the detection box through a connecting head and a gas pipeline, and the detection pipeline for the first working cavity is formed.

8. The system for detecting air tightness of a hydraulic clutch according to claim 7, wherein A vertical second pipeline is arranged at the left end of the upper side wall of the connecting seat, the middle part of the second pipeline is communicated with the middle part of the first pipeline, a second connecting port is arranged at the upper end of the second pipeline, and the second connecting port is connected with the first pneumatic impact valve, so that the second pipeline and the first pipeline constitute a part of the impact pipeline for the first working cavity. The first pneumatic impact valve is connected with the compressed air source through the pipeline outside the detection box and the pipeline in the detection box in sequence.

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