A testing device and method for a transmission hydraulic valve plate

Abstract

This invention discloses a testing device and method for a transmission hydraulic valve plate, relating to the field of fluid sealing performance testing of hydraulic valve plates. The testing device and method include: a stepper motor; a rotating docking inflation component connected to the stepper motor's shaft; a bidirectional moving component positioned below the rotating docking inflation component; and a sealing fixing component slidably connected to the bidirectional moving component. The bidirectional moving component controls the rotation or vertical sliding of the sealing fixing component. This testing device and method fixes and seals the valve plate using the sealing fixing component. The rotating docking inflation component is configured to control the gas flow direction and inflate the valve plate under test via the rotation of the shaft. The bidirectional moving component controls the rotation or vertical sliding of the sealing fixing component, enabling rapid sealing performance testing of the next transformer hydraulic valve plate.

Description

Technical Field

[0001] This invention relates to the field of fluid sealing performance testing technology for hydraulic valve plates, and specifically to a testing device and method for transmission hydraulic valve plates. Background Technology

[0002] After a hydraulic valve plate is newly manufactured or purchased, a comprehensive sealing test is required to ensure that it meets quality standards and design requirements. At this time, the foaming method can be used to test its fluid sealing performance to verify whether there are any potential sealing problems when the valve plate leaves the factory.

[0003] Referring to Chinese Patent Publication No. CN111337196A, an automatic hydraulic valve sealing test device is disclosed, comprising a test machine. The test machine has a lifting chamber on its left side, and a lifting plate that can slide up and down within the lifting chamber. The lifting plate has a through-hole that opens upwards. A flipping plate is rotatably connected to the left end between the front and rear walls of the flipping cavity. A lifting mechanism for controlling the lifting of the lifting plate is provided on the upper side of the lifting plate. The lifting mechanism includes symmetrically fixed rods at the front and rear ends of the upper surface of the lifting plate. This invention detects leakage by conveying and testing hydraulic valves one by one, clamping the front and rear sides of the hydraulic valve, and then clamping the inlet and outlet ends of the hydraulic valve, and then venting air through the valve.

[0004] After a transmission hydraulic valve plate completes its sealing test, the next hydraulic valve plate needs to go through processes such as fixing, moving it to the test pool and completely immersing it in the test fluid, and filling it with gas. The process of switching between the two hydraulic valve plates involves many steps and long intervals, reducing work efficiency. For example, in patent publication number CN111337196A, when replacing a hydraulic valve plate, the new valve plate needs to be moved above the lifting plate and fixed and connected to the telescopic pipe (air filling pipe). Then, the new valve plate is lowered into the test pool, filled with gas, and then inspected. Lifting, flipping, and pushing all require a power source. The structure is complex and occupies a large space. Furthermore, the sealing test cannot be performed directly by simply changing the position of the old and new valve plates. It still requires multiple processes and filling the new valve plate with gas before testing can be carried out. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a testing device and method for a transmission hydraulic valve plate. The device uses a sealing fastener to fix the plate body, its air inlet and outlet holes, and connects the plate body to an outlet pipe. A rotating inflator is configured to control the gas flow direction and inflate the plate body under test via the rotation of a shaft. A bidirectional moving component controls the rotation of the sealing fastener or its sliding along the vertical direction, enabling rapid sealing checks on the next transformer hydraulic valve plate.

[0006] Technical Solution: To achieve the above objectives, the present invention provides the following technical solution: A testing device and method for a transmission hydraulic valve plate, comprising: a stepper motor, the stepper motor having a rotating shaft connected to a rotating docking inflation component, the rotating docking inflation component being configured to control the flow direction of gas and inflate the plate to be tested by rotating the shaft, a bidirectional moving component being disposed below the rotating docking inflation component, the bidirectional moving component being fixedly connected to the rotating part of the stepper motor, the bidirectional moving component being slidably connected to a sealing fixing component, the bidirectional moving component being used to control the rotation of the sealing fixing component or its sliding in the vertical direction, the sealing fixing component being used to fix the plate and seal the air inlet and outlet of the plate, the rotating docking inflation component being connected to the plate through an outlet pipe, a notched ring plate being disposed on the outside of the bottom end of the rotating docking inflation component, a detection box being placed directly below the notched ring plate, the detection box determining the sealing performance of the plate based on the detection of air bubbles, and the moving part of the bidirectional moving component moving in the vertical direction along with the extension and retraction part of the hydraulic cylinder.

[0007] Preferably, the top of the stepper motor is connected to a support plate via a top plate, the bottom of the support plate is connected to a first base plate, the top of the first base plate is connected to the bottom of the detection box, the first base plate is connected to a notched ring plate via a support rod, the bottom of the top plate is connected to a fixing plate via a connecting plate, the width of the notched ring plate is greater than the width of the plate body, and the bottom of the plate body to be tested is slidably connected to the top of the notched ring plate.

[0008] Preferably, the rotating docking inflation component includes: a blower, the fixed end of which is connected to one side of a connecting plate, a fixed plate connected to one side of the fixed plate, a first channel penetrating through the top of the fixed plate, the bottom end of the blower's air outlet pipe extending into the first channel and fixedly connected to the inner wall of the first channel, the bottom of the air outlet pipe being on the same plane as the bottom of the fixed plate, the diameter of the inner wall of the fixed plate being larger than the diameter of the rotating shaft, the axis of the fixed plate being collinear with the axis of the rotating shaft, a sealing plate, a shell, and a bottom being connected to the side of the rotating shaft, the sealing plate, the shell, and the bottom forming an air box, a plurality of partitions evenly distributed in a circumferential direction being connected to the inner wall of the shell, the partitions dividing the interior of the air box into a plurality of non-connected air chambers, a plurality of second channels penetrating through the top of the sealing plate, a plurality of third channels penetrating through the top of the bottom, the bottom of the third channels being connected to an air outlet pipe, and the bottom end of the air outlet pipe being connected to the plate body.

[0009] Preferably, the diameter of the second channel is equal to the diameter of the air intake pipe, each of the third channels is located directly below a second channel, the sealing plate is made of elastic rubber, and each of the second channels is distributed above a chamber.

[0010] Preferably, the bidirectional moving component includes: a central tube, the inner wall of which is connected to the side of the rotating shaft; several side plates are equidistantly connected to the side of the central tube in a circumferential direction; two extension plates are connected to one side of each side plate; the two extension plates are symmetrically distributed along the axis of the side plate; a sliding groove is provided through the top of the side plate; a positioning channel is provided between the two extension plates; a second base plate is connected to the bottom of the side plate; a spring is connected to the top of the second base plate; a slider is slidably connected to the sliding groove; an L-plate is connected to the slider; the L-plate consists of a horizontally placed long plate and a short plate connected to one end of the long plate; an expansion plate is connected to the lower surface of the middle part of the long plate; the positioning channel is slidably connected to the long plate; a placement groove is provided at the bottom of the slider; the bottom of the short plate is connected to the sealing and fixing component; the expansion plate is placed on a push plate; the bottom of the push plate is connected to the telescopic end of the hydraulic cylinder; and the bottom of the extension plate is connected to the top of the base plate.

[0011] Preferably, the position of the plate being detected is the test point, and the position of the plate to be detected is the test point. There are several test points, and there are a total of n points. Each sealing fastener is placed on a test point or a test point. The test point located next in sequence to the test point is the first test point. The rotating part of the stepper motor rotates by an angle of 360° (n) each time. When the plate and the box rotate from the test point to the test point, the slider slides from the bottom of the slide groove to the bottom of the slide groove. The fixed plate and the sealing plate rotate relative to each other. One of the first holes is sealed, and the other first hole is connected to the air inlet pipe. The air inlet pipe above the plate at the test point is sealed, and the air inlet pipes of the plate at adjacent test points are connected.

[0012] Preferably, the sealing fastener includes: a vertical plate, the top of which is connected to the bottom of the L-plate, a vertical plate is provided below each L-plate, a horizontal plate is connected to both ends of each vertical plate away from the rotating shaft, a pressure sealing plate is connected to one side of each horizontal plate, the pressure sealing plate seals the air inlet and outlet of the plate by compression, an air inlet is provided through one side of the horizontal plate, the air inlet is connected to the inner cavity of the plate, and the horizontal plate is fixedly connected to the plate by a threaded rod.

[0013] A method for testing a transmission hydraulic valve plate includes a transmission hydraulic valve plate testing device. The device is characterized by fixing the plate body, the air inlet and outlet of the sealing plate body, and connecting the plate body to the air outlet pipe via a sealing fastener. The sealing fastener is slidably connected to a rotating docking inflation component. The sealing fastener is lifted by the telescopic end of a hydraulic cylinder, bringing all plates to the same height. The rotating end drives the sealing fastener, plate body, and housing to rotate, transferring a new plate body from the test point to the test point. The telescopic end of the hydraulic cylinder lowers the new plate body and immerses it in the test fluid. The fixed plate and the sealing plate rotate relative to each other. A new second channel is connected to the air outlet pipe, located directly above the first test point. A fan fills the cavity of the plate body at the first test point with gas, and this process is repeated sequentially.

[0014] Beneficial Effects: This invention provides a testing device and method for a transmission hydraulic valve plate. Compared with the prior art, it has the following beneficial effects: 1. The plate body is fixed by a sealing fastener, and the air inlet and outlet of the sealing plate body are connected to the air outlet pipe. The sealing fastener is lifted by the telescopic end of the hydraulic cylinder, so that all plates are at the same height. The telescopic end of the hydraulic cylinder moves the new plate body down and into the test fluid. The fixed plate and the sealing plate rotate relative to each other, and the new second channel is connected to the air outlet pipe. The new channel is located directly above the first test point. The internal cavity of the plate body at the first test point is filled with gas by a fan. This process is repeated sequentially. When testing one plate body, the inflation of the test plate body and the fixing of other plates can be completed. Only one rotation is needed to check the sealing performance of the next transformer hydraulic valve plate, reducing the working steps of adjacent test pieces, shortening the time interval, and improving work efficiency.

[0015] 2. To prevent the exhaust pipe from twisting, the air box needs to rotate synchronously with the shaft. The box body should only inflate the plate at the test point. The stationary plate needs to remain fixed and close the second channel after rotation. Therefore, multiple second channels are required. These second channels must close again after rotating to the test point. Thus, the stationary plate needs to be a solid plate with only one first channel, compatible with the sealing plate. After the sealing test, the gas inside the plate needs to be released. Therefore, the stationary plate needs to have a notch to prevent it from sealing the second channel at the top of the plate after testing.

[0016] 3. If the first channel is only connected to one second channel, when a plate rotates from the test point to the test point, the second channel corresponding to that plate will no longer be connected to the air outlet. If there is a leak in the plate, some gas will leak out prematurely, the pressure inside the plate will decrease, and the plate will no longer be filled with gas. This makes it impossible to simulate that all chambers, oil passages, and sealing interfaces inside the hydraulic valve plate are under pressure, and it is also impossible to ensure that the pressure inside the valve plate is evenly distributed. By setting a common air chamber, which is connected to two adjacent second channels through two first channels, the plate can be connected to the common air chamber when it is located at both the test point and the test point. When there is a leak in the plate, gas can continue to be injected into the inner cavity of the plate to ensure that the inner cavity of the plate is filled with gas. Attached Figure Description

[0017] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present application and, together with the specification, further serve to explain the principles of the present application and enable those skilled in the art to implement and use the present application.

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the present invention.

[0020] Figure 2 for Figure 1 A structural diagram after removing the support plate, top plate, connecting plate, and support rod.

[0021] Figure 3 for Figure 2 A view taken from below.

[0022] Figure 4 for Figure 2 A schematic diagram of the structure after removing the detection box.

[0023] Figure 5 This is a structural diagram of the rotating docking inflatable component, the bidirectional moving component, and the sealing and fixing component.

[0024] Figure 6 This is a schematic diagram of the rotating docking inflatable component.

[0025] Figure 7 This is a structural diagram of the part where the fixed plate and the outer shell are located.

[0026] Figure 8 This is a schematic diagram of the bidirectional moving component.

[0027] Figure 9 This is an exploded view of the bidirectional moving component.

[0028] Figure 10 This is a top view of the section containing the central tube, side plates, and extension plates.

[0029] Figure 11 This is a separate diagram of the structure containing the central tube, side plates, extension plates, and their internal structures.

[0030] Figure 12 This is a structural schematic diagram of a sealing fastener.

[0031] The reference numerals in the diagram are as follows: 11. First base plate; 12. Support plate; 13. Top plate; 14. Connecting plate; 15. Support rod; 16. Detection box; 17. Plate body; 18. Fixing plate; 2. Stepper motor; 3. Rotating docking inflation component; 31. Fan; 32. Inlet pipe; 33. Fixed plate; 34. Sealing plate; 35. Outer shell; 36. Partition plate; 37. Lower base; 38. Outlet pipe; 4. Bidirectional moving component; 41. Rotating shaft; 42. 43. Slider; 44. Expanding plate; 45. L-plate; 46. Central tube; 47. Side plate; 48. Extension plate; 49. Spring; 50. Second base plate; 51. Sealing fastener; 52. Vertical plate; 53. Horizontal plate; 54. Pressure sealing plate; 55. Threaded rod; 66. Air inlet; 67. Hydraulic cylinder; 68. Push plate; 79. First channel; 70. Second channel; 71. Third channel; 81. Slide groove; 82. Positioning channel; 9. Notched ring plate.

[0032] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0035] Example 1: As Figure 1 - Figure 12 As shown, an embodiment of the present invention provides a transmission hydraulic valve plate testing device, including: a stepper motor 2, the rotating shaft 41 of the stepper motor 2 is connected to a rotating docking inflation component 3, the rotating docking inflation component 3 is configured to control the flow direction of gas and inflate the plate 17 to be tested by rotating the rotating shaft 41, a bidirectional moving component 4 is provided below the rotating docking inflation component 3, the bidirectional moving component 4 is fixedly connected to the rotating part of the stepper motor 2, the bidirectional moving component 4 is slidably connected to a sealing fixing component 5, the bidirectional moving component 4 is used to control the rotation of the sealing fixing component 5 or to slide in the vertical direction, the sealing fixing component 5 is used to fix the plate 17 and seal the air inlet and outlet of the plate 17, the rotating docking inflation component 3 is connected to the plate 17 through an air outlet pipe 38, a notched ring plate 9 is provided on the outside of the bottom end of the rotating docking inflation component 3, a detection box 16 is placed directly below the notched ring plate 9, the detection box 16 judges the sealing performance of the plate 17 based on the detection of air bubbles, and the moving part of the bidirectional moving component 4 moves in the vertical direction with the extension and retraction part of the hydraulic cylinder 61.

[0036] The top of the stepper motor 2 is connected to the support plate 12 via the top plate 13. The bottom of the support plate 12 is connected to the first base plate 11. The top of the first base plate 11 is connected to the bottom of the detection box 16. The first base plate 11 is connected to the notched ring plate 9 via the support rod 15. The bottom of the top plate 13 is connected to the fixing plate 18 via the connecting plate 14. The width of the notched ring plate 9 is greater than the width of the plate body 17. The bottom of the plate body 17 to be tested is slidably connected to the top of the notched ring plate 9.

[0037] The rotating docking inflatable component 3 includes: a blower 31, the fixed end of which is connected to one side of the connecting plate 14; a fixed plate 33 is connected to one side of the fixed plate 18; a first channel 71 is formed through the top of the fixed plate 33; the bottom end of the air outlet pipe 38 of the blower 31 extends into the first channel 71 and is fixedly connected to the inner wall of the first channel 71; the bottom of the air outlet pipe 38 is on the same plane as the bottom of the fixed plate 33; the diameter of the inner wall of the fixed plate 33 is larger than the diameter of the rotating shaft 41; the axis of the fixed plate 33 is collinear with the axis of the rotating shaft 41; and the side of the rotating shaft 41... The surface is connected to a sealing plate 34, an outer shell 35, and a bottom 37. The sealing plate 34, the outer shell 35, and the bottom 37 form an air box. The inner wall of the outer shell 35 is connected to several partitions 36 that are equidistantly distributed in the circumferential direction. The partitions 36 divide the interior of the air box into several non-connected air chambers. Several second channels 72 are opened through the top of the sealing plate 34. Several third channels 73 are opened through the top of the bottom 37. The bottom of the third channel 73 is connected to an air outlet pipe 38. The bottom end of the air outlet pipe 38 is connected to the plate body 17.

[0038] The air outlet pipe 38 is connected to the plate 17 and rotates with the plate 17. To prevent excessive twisting or entanglement of the air outlet pipe 38, the air delivery device above the air outlet pipe 38 also needs to rotate synchronously, which means it needs to be connected to the rotating shaft 41. If the fan 31 is directly connected to the rotating shaft 41, the fan 31 will be heavy, increasing the load on the rotating shaft 41, and it will also be impossible to flexibly control the opening and closing of each pipe. Adding a solenoid valve to each pipe would be too costly and difficult to adjust. Therefore, a box that can control the opening and closing of the air outlet end of the air outlet pipe 38 can be installed on the rotating shaft 41.

[0039] To ensure that only the plate 17 at the test point is inflated, the fixed plate 33 needs to be stationary and close the second channel 72 after rotation. Therefore, multiple second channels 72 are required. Since the second channels 72 need to close again after rotation to the test point, the fixed plate 33 must be a solid plate 17 with only one first channel 71, compatible with the sealing plate 34. After the sealing test, the gas inside the plate 17 needs to be released. Therefore, the fixed plate 33 needs to have a notch so that it no longer seals the second channel 72 at the top of the plate 17 after testing.

[0040] The diameter of the second channel 72 is equal to the diameter of the air intake pipe 32. Each third channel 73 is located directly below a second channel 72. The sealing plate 34 is made of elastic rubber. Each second channel 72 is distributed above a chamber.

[0041] The bidirectional moving component 4 includes: a central tube 45, the inner wall of which is connected to the side of the rotating shaft 41; several side plates 46 are equidistantly connected to the side of the central tube 45 in a circumferential direction; each side plate 46 has two extension plates 47 connected to one side; the two extension plates 47 are symmetrically distributed along the axis of the side plate 46; a sliding groove 81 is provided through the top of the side plate 46; a positioning channel 82 is provided between the two extension plates 47; a second base plate 49 is connected to the bottom of the side plate 46; and a spring is connected to the top of the second base plate 49. Spring 48, slide groove 81 are slidably connected to slider 42, slider 42 is connected to L plate 44, L plate 44 is composed of a horizontally placed long plate and a short plate connected to one end of the long plate, the lower surface of the middle part of the long plate is connected to expansion plate 43, positioning channel 82 is slidably connected to the long plate, the bottom of slider 42 is provided with a placement groove, the bottom of the short plate is connected to sealing fastener 5, expansion plate 43 is placed on push plate 62, the bottom of push plate 62 is connected to the telescopic end of hydraulic cylinder 61, and the bottom of extension plate 47 is connected to the top of base plate.

[0042] The position of the plate 17 to be detected is the test point, and the position of the plate 17 to be detected is the test point. There are several test points, and there are a total of n points. Each sealing fastener 5 is placed on a test point or a test point. The test point located next in sequence to the test point is the first test point. The rotating part of the stepper motor 2 rotates by an angle of 360° of n each time. When the plate 17 and the box rotate from the test point to the test point, the slider 42 slides from the bottom of the slide groove 81 to the bottom of the slide groove 81. The fixed plate 33 and the sealing plate 34 rotate relative to each other. One first channel 71 is sealed, and the other first channel 71 is connected to the air inlet pipe 32. The air inlet pipe 32 above the plate 17 at the test point is sealed, and the air inlet pipe 32 of the plate 17 at the adjacent test points is connected.

[0043] The sealing fastener 5 includes: a vertical plate 51, the top of which is connected to the bottom of the L plate. A vertical plate 51 is provided below each L plate. A horizontal plate 52 is connected to both ends of the side of each vertical plate 51 away from the rotating shaft 41. A pressure sealing plate 53 is connected to one side of each horizontal plate 52. The pressure sealing plate 53 seals the air inlet and outlet of the plate body 17 by compression. An air inlet 55 is provided through one side of the horizontal plate 52. The air inlet 55 is connected to the inner cavity of the plate body 17. The horizontal plate 52 is fixedly connected to the plate body 17 by a threaded rod 54.

[0044] A method for testing a transmission hydraulic valve plate includes a transmission hydraulic valve plate testing device. A sealing fastener 5 fixes the plate body 17 and the sealing plate 34. The air inlet and outlet of the plate body 17 are connected to the air outlet pipe 38. The sealing fastener 5 is slidably connected to the rotating docking inflation component 3. The extension end of a hydraulic cylinder 61 lifts the sealing fastener 5, bringing all plates 17 to the same height. The rotating end drives the sealing fastener 5, plate body 17, and housing to rotate, transferring a new plate body 17 from the test point to the test point. The extension end of the hydraulic cylinder 61 carries the new plate body 17 down and into the test fluid. The fixed plate 33 and the sealing plate 34 rotate relative to each other. A new second channel 72 is connected to the air outlet pipe 38, located directly above the first test point. A fan 31 fills the inner cavity of the plate body 17 at the first test point with gas, and this process is repeated sequentially.

[0045] In use, the sealing plate 53 seals the air inlet or outlet of the plate 17 (transmission hydraulic valve plate). The horizontal plate 52 is fixedly connected to the plate 17 by the threaded rod 54. The slider 42 and the long plate of the L plate are respectively placed into the slide groove 81 and the positioning channel 82. The bottom of the plate 17 is placed on the notched ring plate 9. The slider 42 slides along the slide groove 81 and the long plate slides along the positioning channel 82, thus completing the positioning of the L plate, the horizontal plate 52 and the plate 17, so that the plate 17 can only rotate or move in the vertical direction.

[0046] The plate 17 is located at the test point. The fan 31 injects air into the inner cavity of the plate 17 through the air inlet pipe 32, a second channel 72, the air cavity, and the air outlet pipe 38. After the plate 17 is filled with gas, the fan is turned off.

[0047] When the motor is started, the rotating part of the motor drives all the central tubes 45, side plates 46, extension plates 47, sliders 42, L plates, plate bodies 17, and boxes (the boxes are composed of sealing plates 34, outer shells 35, and bottom plates 37) to rotate in sequence via the rotating shaft 41. Each plate body 17 is connected to a chamber and a second channel 72 in sequence via an air outlet pipe 38. The plate body 17 rotates from the test point to above the test point, and the bottom of the plate body 17 slides to the notch of the notched ring plate 9. The bottom of the plate body 17 slides from the top of the notched ring plate 9 to the top of the push plate 62. Before rotation, the sealing plate 34 is connected to the second channel 72 corresponding to the plate 17. After rotation, the sealing plate 34 and the top plate 13 rotate relative to each other (the fixed plate 33 remains stationary, and the sealing plate 34 rotates with the rotating shaft 41). The second channel 72 corresponding to the plate 17 moves away from the bottom end of the air inlet pipe 32. The second channel 72 contacts and is sealed with other parts of the fixed plate 33 (the fixed plate 33 and the sealing plate 34 are both made of sealing material on the side closest to each other). At the same time, another adjacent second channel 72 rotates to the top of the first test point and connects to the air outlet pipe 38.

[0048] Next, the hydraulic cylinder 61 is activated. The telescopic end of the hydraulic cylinder 61 moves vertically downwards, carrying the push plate 62 and the plate 17 in sequence. The plate 17, the slider 42, and the L-plate move together. The plate 17 enters the detection box 16 and is submerged in the detection fluid. The slider 42 approaches and squeezes the spring 48. The spring 48 is compressed, which reduces the impact force when the plate 17 moves downwards. The plate 17 is completely submerged in the detection fluid. The detection box 16 is equipped with multiple high-speed cameras. The high-speed cameras capture the bubbles or tiny bubbles generated momentarily. If bubbles are generated, it is determined that the transmission hydraulic valve plate is leaking.

[0049] After the sealing test, the extension end of the hydraulic cylinder 61 moves the plate 17 upward until the top of the push plate 62 and the top of the notch ring plate 9 are on the same plane. The rotating part of the stepper motor 2 rotates all the plates 17 again, turning the plate 17 located at the test point to the test completion point. The second channel 72 is directly facing the notch of the top plate 13. At this time, the second channel 72 corresponding to the plate 17 is no longer sealed by the bottom of the fixed plate 33. The gas in the inner cavity of the plate 17 escapes to the external environment through the air outlet pipe 38, the third channel 73, the air cavity, and the second channel 72.

[0050] Simultaneously, another plate 17 moves to the test point. The second channel 72 above this plate 17 is connected to the air outlet pipe 38. The inflation of this plate 17 is completed just before its test. Inflation of the plate 17 to be tested and the fixing of other plates 17 can be completed while one plate 17 is being tested. Only one rotation is needed to perform a sealing check on the next transformer hydraulic valve plate, reducing the number of steps required for adjacent tests, shortening time intervals, and improving work efficiency.

[0051] Example 2: Figure 1 - Figure 12 As shown, an embodiment of the present invention provides a transmission hydraulic valve plate testing device. A common air chamber is provided in the middle of the fixed plate 33. The top of the common air chamber is connected to the bottom of the air outlet pipe 38. Two first channels 71 are provided at the bottom of the common air chamber. Each first channel 71 is connected to a second channel 72. The two first channels 71 are respectively set at the test point and the test point.

[0052] In actual operation, hydraulic valve plates are filled with hydraulic oil and subjected to a certain pressure. During airtightness testing, filling the valve plate with gas and applying pressure simulates the pressure environment under actual working conditions, allowing for a more accurate assessment of the valve plate's sealing performance. Only by conducting tests under these simulated real-world conditions can we ensure the valve plate's reliable operation after being put into use, preventing hydraulic system malfunctions due to sealing issues. Filling the hydraulic valve plate with gas ensures that all internal chambers, oil passages, and sealing interfaces are pressurized. This allows for a comprehensive inspection of all potential weak points in the seals, including minute leaks that might not be detected during partial inflation due to insufficient pressure. Full inflation also ensures a uniform pressure distribution within the valve plate, preventing misjudgments caused by uneven local pressure. Insufficient gas filling can lead to unstable internal pressure, making it difficult to accurately determine leaks during testing and affecting the accuracy and reliability of the results. For example, partial inflation may cause pressure fluctuations, masking minor leaks or misinterpreting normal pressure changes as leaks.

[0053] If the first channel 71 is connected to only one second channel 72, when a plate 17 rotates from the test point to the test point, the second channel 72 corresponding to the plate 17 is no longer connected to the air outlet pipe 38. The plate 17 loses its main gas filling path. However, if there is a leak in the plate 17 during the rotation, some gas will leak out in advance, the pressure inside the plate 17 will decrease, and the plate 17 will no longer be filled with gas. It is impossible to simulate that all the chambers, oil passages and sealing interfaces inside the hydraulic valve plate are under pressure, and it is also impossible to ensure that the pressure inside the valve plate is evenly distributed.

[0054] A common air chamber is now provided, which is connected to two adjacent second air chambers 72 through two first air chambers 71. When the plate 17 is located at the two positions of the test point and the test point, the plate 17 can be connected to the common air chamber. When the plate 17 leaks, gas can be injected into the inner cavity of the plate 17 to ensure that the inner cavity of the plate 17 is full of gas.

[0055] This invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this invention. To provide the public with a thorough understanding of this invention, specific details have been described in detail in the above preferred embodiments; however, those skilled in the art will fully understand the invention even without these details. Furthermore, to avoid unnecessary misunderstanding of the essence of this invention, well-known methods, processes, procedures, components, and circuits have not been described in detail.

[0056] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A testing device for a transmission hydraulic valve plate, characterized in that, include: A stepper motor (2) is provided, and a rotating docking inflator (3) is connected to the rotating shaft (41) of the stepper motor (2). The rotating docking inflator (3) is configured to control the flow direction of gas and inflate the plate (17) to be tested by rotating the rotating shaft (41). A bidirectional moving part (4) is provided below the rotating docking inflator (3). The bidirectional moving part (4) is fixedly connected to the rotating part of the stepper motor (2). A sealing fastener (5) is slidably connected to the bidirectional moving part (4). The bidirectional moving part (4) is used to control the rotation of the sealing fastener (5). Or slide along the vertical direction. The sealing and fixing member (5) is used to fix the plate (17) and seal the air inlet and outlet of the plate (17). The rotating docking inflation member (3) is connected to the plate (17) through the air outlet pipe (38). A notched ring plate (9) is provided on the outside of the bottom end of the rotating docking inflation member (3). A detection box (16) is placed directly below the notched ring plate (9). The detection box (16) judges the sealing performance of the plate (17) based on the detection bubble. The moving part of the bidirectional moving member (4) moves along the vertical direction with the extension and retraction part of the hydraulic cylinder (61). The top of the stepper motor (2) is connected to a support plate (12) via a top plate (13). The bottom of the support plate (12) is connected to a first base plate (11). The top of the first base plate (11) is connected to the bottom of the detection box (16). The first base plate (11) is connected to the notched ring plate (9) via a support rod (15). The bottom of the top plate (13) is connected to a fixing plate (18) via a connecting plate (14). The width of the notched ring plate (9) is greater than the width of the plate body (17). The bottom of the plate body (17) to be tested is slidably connected to the top of the notched ring plate (9). The rotating docking inflation component (3) includes: a blower (31), the fixed end of the blower (31) is connected to one side of the connecting plate (14), and a fixed plate (33) is connected to one side of the fixed plate (18). A first channel (71) is opened through the top of the fixed plate (33). The bottom end of the air inlet pipe (32) of the blower (31) extends into the first channel (71) and is fixedly connected to the inner wall of the first channel (71). The bottom of the air inlet pipe (32) and the bottom of the fixed plate (33) are located on the same plane. The diameter of the inner wall of the fixed plate (33) is larger than the diameter of the rotating shaft (41). The axis of the fixed plate (33) is collinear with the axis of the rotating shaft (41). 1) is connected to a sealing plate (34), a shell (35), and a bottom (37) on its side. The sealing plate (34), the shell (35), and the bottom (37) form a wind box. The inner wall of the shell (35) is connected to several partitions (36) that are equidistantly distributed in the circumferential direction. The partitions (36) divide the inside of the wind box into several non-connected wind cavities. The top of the sealing plate (34) is provided with several second channels (72). The top of the bottom (37) is provided with several third channels (73). The bottom of the third channel (73) is connected to an air outlet pipe (38). The bottom end of the air outlet pipe (38) is connected to the plate body (17).

2. The transmission hydraulic valve plate testing device according to claim 1, characterized in that: The diameter of the second channel (72) is equal to the diameter of the air inlet pipe (32). Each of the third channels (73) is located directly below a second channel (72). The sealing plate (34) is made of elastic rubber. Each of the second channels (72) is located above a chamber.

3. The transmission hydraulic valve plate testing device according to claim 1, characterized in that: The bidirectional moving component (4) includes: a central tube (45), the inner wall of which is connected to the side of the rotating shaft (41), and several side plates (46) are equidistantly connected to the side of the central tube (45) in a circumferential direction. Each side plate (46) is connected to two extension plates (47) on one side. The two extension plates (47) are symmetrically distributed along the axis of the side plate (46). A sliding groove (81) is provided through the top of the side plate (46), and a positioning channel (82) is provided between the two extension plates (47). A second base plate (49) is connected to the bottom of the side plate (46), and a spring (48) is connected to the top of the second base plate (49). A slider (42) is slidably connected to the sliding groove (81), and an L is connected to the slider (42). The L-plate (44) consists of a horizontally placed long plate and a short plate connected to one end of the long plate. An expansion plate (43) is connected to the lower surface of the middle part of the long plate. The positioning channel (82) is slidably connected to the long plate. A placement groove is opened at the bottom of the slider (42). The bottom of the short plate is connected to the sealing fastener (5). The expansion plate (43) is placed on the push plate (62). The bottom of the push plate (62) is connected to the telescopic end of the hydraulic cylinder (61). The bottom of the extension plate (47) is connected to the top of the base plate.

4. The transmission hydraulic valve plate testing device according to claim 3, characterized in that, The position of the plate (17) to be detected is the test point, and the position of the plate (17) to be detected is the test point. There are several test points, and there are n points in total, including test points and test points. Each sealing fastener (5) is placed on a test point or test point. The test point located next in order of the test point is the first test point. The rotating part of the stepper motor (2) rotates at an angle of 360° n each time. When the plate (17) and the box rotate from the test point to the test point, the slider (42) slides from the bottom of the slide groove (81) to the bottom of the slide groove (81). The fixed plate (33) and the sealing plate (34) rotate relative to each other. One of the second channels (72) is sealed, and the other second channel (72) is connected to the air outlet pipe (38). The air outlet pipe (38) above the plate (17) at the test point is sealed, and the air outlet pipe (38) of the plate (17) at the adjacent test points is connected.

5. The transmission hydraulic valve plate testing device according to claim 1, characterized in that: The sealing fastener (5) includes: a vertical plate (51), the top of which is connected to the bottom of the L plate, a vertical plate (51) is provided below each L plate, a horizontal plate (52) is connected to both ends of the side of each vertical plate (51) away from the rotating shaft (41), and a pressure sealing plate (53) is connected to one side of each horizontal plate (52). The pressure sealing plate (53) seals the air inlet and outlet of the plate body (17) by compression. An air inlet (55) is provided through one side of the horizontal plate (52), and the air inlet (55) is connected to the inner cavity of the plate body (17). The horizontal plate (52) is fixedly connected to the plate body (17) by a threaded rod (54).

6. A method for testing a transmission hydraulic valve plate, comprising the transmission hydraulic valve plate testing apparatus according to any one of claims 1-5, characterized in that, The sealing fastener (5) fixes the air inlet and outlet of the plate (17) and the sealing plate (34) and connects the plate (17) with the air outlet pipe (38). The sealing fastener (5) is slidably connected to the rotating docking air filling component (3). The sealing fastener (5) is lifted by the telescopic end of the hydraulic cylinder (61). All plates (17) are at the same height. The rotating end drives the sealing fastener (5), plate (17) and box to rotate. The new plate (17) is transferred from the test point to the test point. The telescopic end of the hydraulic cylinder (61) moves the new plate (17) down and into the test liquid. The fixed plate (33) and the sealing plate (34) rotate relative to each other. The new second channel (72) is connected to the air outlet pipe (38). The new channel is located directly above the first test point. The fan (31) fills the inner cavity of the plate (17) at the first test point with gas and circulates in sequence.

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