An oil injection assembly for hydrostatic slide oil film stiffness testing

Abstract

The application relates to an oil injection assembly for testing oil film stiffness of a hydrostatic slide, and belongs to the technical field of hydrostatic guide performance testing. The structure of the oil injection assembly comprises a box body, an oil inlet arranged on one side of the box body, a plurality of oil outlets arranged at the bottom of the box body, a main oil inlet pipe and a plurality of auxiliary oil inlet pipes arranged in the box body, one end of the main oil inlet pipe being fixedly arranged on the oil inlet, the other end of the main oil inlet pipe being provided with a gas outlet, the gas outlet being provided with a driving assembly, one end of each of the plurality of auxiliary oil inlet pipes being communicated with the main oil inlet pipe, the other end of each of the plurality of auxiliary oil inlet pipes being fixedly arranged on the oil outlet, each of the plurality of oil outlets being provided with an opening assembly at the top, each of the plurality of oil outlets being provided with a closing assembly, the driving assembly being connected with the opening assembly and the closing assembly, the driving assembly being used for driving the opening assembly and the closing assembly to slide, and a distance sensor being arranged on one side of the box body. The application has the technical effect of reducing the gas bubbles generated in the oil during oil supply.

Description

Technical Field

[0001] This application relates to the technical field of hydrostatic guide rail performance testing, and in particular to an oil injection assembly for hydrostatic slider oil film stiffness testing. Background Technology

[0002] The multi-slider oil film stiffness pressure test bench is a key piece of equipment for verifying the performance of core components such as hydrostatic guideways and hydrostatic bearings. It tests the load-bearing stiffness of the oil film between multiple hydrostatic sliders and the guideway by simulating load pressure under actual working conditions, providing data support for equipment precision optimization and reliability design. The oil injection assembly for hydrostatic slider oil film stiffness testing serves as the core oil supply unit of this test bench. It needs to precisely deliver oil to multiple hydrostatic sliders to form a stable oil film. Simultaneously, it must work in conjunction with the distance sensor equipped on the test bench to capture the displacement changes of the sliders under different oil film support states in real time, thereby calculating the oil film stiffness parameters. The stability, purity, and synergy with sensor detection directly determine the accuracy of the test data.

[0003] Existing oil injection assemblies for hydrostatic slider oil film stiffness testing mostly adopt a structure of main pipeline diversion and branch valve control. That is, the oil is delivered to the test bench through a single main oil inlet pipe, and then connected to each hydrostatic slider through multiple sets of branch pipelines. Manual valves are installed on the branch pipelines to control the start and stop of oil supply. These assemblies generally have the problem of incomplete oil venting. Residual air bubbles in the pipeline can easily enter the slider with the oil, interfering with oil film formation. At the same time, it is difficult to achieve synchronous start and stop of oil supply to multiple sliders by manually controlling the valves, which affects the test efficiency.

[0004] Patent (CN 117740519 A) discloses a hydrostatic guide rail performance testing device and method. The hydrostatic guide rail performance testing device includes: a base, a worktable, a pressurizing mechanism, a load monitoring mechanism, an oil supply mechanism, and an oil film monitoring mechanism. The load monitoring mechanism is mounted on the worktable to monitor the pressure exerted on it. The oil supply mechanism is used to supply oil to the hydrostatic guide rail to generate an oil film between the guide rail and the hydrostatic slider. The oil film monitoring mechanism is mounted on the base and is used to monitor the thickness of the oil film. The hydrostatic guide rail performance testing method includes testing steps and calculation steps. While the patent enables the oil supply mechanism to supply oil to the hydrostatic slider to generate an oil film between the slider and the guide rail, it is limited to oil supply only; it cannot effectively reduce or eliminate excess air and air bubbles generated by the oil in the oil supply assembly.

[0005] Regarding the aforementioned technologies, the inventors believe that there is a defect where air and oil mix during oil supply, generating air bubbles that interfere with the accuracy of the test. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides an oil injection assembly for testing the stiffness of a hydrostatic slider oil film.

[0007] This application provides an oil injection assembly for testing the stiffness of a hydrostatic slider oil film, which adopts the following technical solution: An oil injection assembly for testing the stiffness of a hydrostatic slider oil film includes a housing. One side of the housing has an oil inlet, and the bottom of the housing has multiple oil outlets. Inside the housing are a main oil inlet pipe and multiple auxiliary oil inlet pipes. One end of the main oil inlet pipe is fixed to the oil inlet, and the other end has an air outlet. A drive assembly is mounted on the air outlet. One end of each of the auxiliary oil inlet pipes is connected to the main oil inlet pipe, and the other end of each auxiliary oil inlet pipe is fixed to the oil outlet. Each of the oil outlets has an opening assembly at its top and a closing assembly on its top. The drive assembly is connected to the opening and closing assemblies and is used to drive the opening and closing assemblies to slide. A distance sensor is located on one side of the housing.

[0008] By adopting the above technical solution, an oil inlet and multiple oil outlets are respectively provided on one side and bottom of the housing. The housing is equipped with a main oil inlet pipe and multiple auxiliary oil inlet pipes. The main oil inlet pipe and auxiliary oil inlet pipes are pre-filled with oil through the oil inlet, allowing the internal air to be discharged to the drive component through the air outlet. After the drive component moves, the oil outlet is opened to supply oil to the hydrostatic slider through the combined action of the opening and closing components. This avoids the formation of air bubbles when the oil is directly added, which would seriously affect the oil film stiffness test results. This component effectively reduces air bubbles in the oil, ensuring that the oil film stiffness test data can truly reflect the actual working conditions between the hydrostatic slider and the hydrostatic slide rail. This provides reliable data for subsequent oil film stiffness analysis and related equipment design. A distance sensor installed on one side of the housing can monitor the oil film position changes in real time.

[0009] Preferably, the drive assembly includes a cylinder, a first piston block, and a first piston rod. One end of the cylinder has an air outlet fixedly connected to it. The first piston block is slidably connected inside the cylinder. One end of the first piston rod is fixedly connected to the piston block. A reset opening is provided on one side of the cylinder, and the reset opening communicates with the cylinder. A pressure relief assembly is provided on the cylinder above the reset opening.

[0010] By adopting the above technical solution, the drive component is directly connected to the air outlet. When the main oil inlet pipe and the auxiliary oil inlet pipe are filled with oil, the air will be squeezed into the cylinder. The sliding of the first piston block in the cylinder causes the first piston rod to engage with the opening component. The sliding of the first piston block can drive the opening component to open the oil outlet to achieve automatic oil supply. A reset opening is provided on one side of the cylinder. The pressure relief component above the reset opening can be opened after the cylinder stops supplying oil to release excess air and pressure and reset each component.

[0011] Preferably, a reset device is provided inside the reset opening. The reset device includes a second piston block, a second piston rod, and a reset spring. The second piston block is slidably connected inside the reset opening. One end of the second piston rod is fixedly connected to one side of the second piston block. In its natural state, one end of the reset spring is fixedly connected to the other side of the second piston block, and the other end of the reset spring is fixedly connected to the reset opening. The other end of the second piston rod is disposed on the closing assembly.

[0012] By adopting the above technical solution, the reset spring acts on the second piston block with elastic force in its natural state. When the pressure relief component discharges the air inside the cylinder, the elastic potential energy of the reset spring pulls the second piston block to slide and reset. Then, the second piston rod drives the closing component to move, realizing the automatic closing of the oil outlet. After the venting and oil supply are completed, the reset device can quickly drive the closing component to close the oil outlet, avoiding the continuous flow of oil that would cause waste or affect the test environment.

[0013] Preferably, the opening assembly includes a guide rod, a lever, and an opening baffle. The guide rod is slidably connected to the outside of the housing, one end of the guide rod is fixedly mounted on the other end of the first piston rod, one end of the lever is fixedly connected to the other end of the guide rod, the opening baffle is slidably connected to the oil outlet, a top plate is provided on the outside of the opening baffle, and the other end of the lever is located at the lower part of the top plate.

[0014] By adopting the above technical solution, the first piston rod of the opening component and the driving component are directly connected. When air enters the cylinder, the first piston rod drives the guide rod to slide, and then drives the opening baffle to slide upward through the cooperation of the lever and the top plate. This design ensures that the oil supply opening action and the process of air entering the cylinder are strictly synchronized. Only when the air has completely entered the cylinder will the opening baffle be pushed up by the lever, ensuring that the oil enters the static pressure slider in a state without air bubble interference, thus ensuring the accuracy of the test data from the source. At the same time as the opening baffle is pushed up, the second piston rod drives the closing component to pop out, forming a coordinated action of opening and releasing, ensuring that the oil outlet is completely unobstructed and that there is no structure to obstruct the flow of oil.

[0015] Preferably, the closing assembly includes a closing plate, a support rod, a rotating rod, a pressure spring, a guide post, and a pressure plate. The closing plate has multiple sets of oil outlets evenly distributed, and the closing plate is slidably disposed in the multiple sets of oil outlets. One end of the support rod is fixedly connected to one side of the housing. The rotating rod is rotatably connected to the support rod, and one end of the rotating rod is rotatably connected to one end of a drive rod. The other end of the drive rod is rotatably connected to a second piston rod. The pressure plate has a guide hole. One end of the guide post is rotatably connected to the other end of the rotating rod, and the other end of the guide post is slidably disposed within the guide hole. The pressure spring is sleeved on the guide post, and one end of the pressure spring is fixedly connected to the rotating rod. The other end of the pressure spring is fixedly connected to one side of the pressure plate. One end of the closing plate is fixedly disposed on the other side of the pressure plate.

[0016] By adopting the above technical solution, multiple oil outlets on the closing plate and multiple oil outlets at the bottom of the tank are aligned through sliding to supply oil. When the opening baffle is opened, the spring force of the pressure spring pushes the closing plate to slide, so that the oil outlets are precisely aligned with the oil outlets, ensuring that the oil flows out evenly and stably. Conversely, when the oil supply stops, the pressure relief component resets, so that the closing plate is reset to achieve a sealed closure, ensuring the accuracy of oil supply opening and closing, and avoiding oil leakage or supply interruption. The closing component is linked with the rotating rod, the second piston rod and the reset device to form a complete transmission chain, so that the closing action is strictly synchronized with the venting and opening process. When the opening component completes its action, the closing plate will pop out under the action of the pressure spring to supply oil, ensuring that the oil enters the static pressure slider in a bubble-free state, thus ensuring the test accuracy from a mechanism perspective.

[0017] Preferably, the pressure relief assembly includes a guide pin, which is disposed through the cylinder body and slidably connected to the cylinder body. Limiting plates are provided at both ends of the guide pin. A portion of the guide pin on the outer side of the cylinder body is a hollow cavity. Exhaust holes are provided on the hollow cavity of the guide pin and on the limiting plates on the outer side of the cylinder body.

[0018] By adopting the above technical solution, the solid part of the guide pin slides outward under the action of the air pressure inside the cylinder, naturally blocking the passage between the cylinder and the outside, forming a one-way sealing structure. This design ensures that the air in the cylinder can only flow to the preset path of the drive component during the exhaust stage, avoiding premature leakage of air from the pressure relief component. When it is necessary to release the residual air in the cylinder, the guide pin is pushed into the cylinder by external force, so that the hollow cavity part enters the cylinder. At this time, the air in the cylinder can be discharged through the exhaust hole on the hollow cavity and the exhaust hole on the outer limiting plate.

[0019] Preferably, the oil inlet is provided with an oil inlet baffle and a tension spring. The oil inlet baffle is rotatably connected inside the oil inlet. One end of the tension spring is rotatably connected to one end of the oil inlet baffle, and the other end of the tension spring is rotatably connected to the oil inlet. The oil inlet baffle is provided with a linkage component, and the oil inlet baffle drives the pressure relief component to slide through the linkage component.

[0020] By adopting the above technical solution, when oil is injected into the oil inlet, the oil pressure overcomes the tension of the tension spring and pushes the oil inlet baffle to rotate. The oil inlet baffle drives the guide pin to slide outward synchronously through the linkage component, so that the solid part of the guide pin blocks the passage between the cylinder and the outside, ensuring that the pressure relief component is in a sealed state during the oil supply stage, preventing air in the cylinder from leaking from the pressure relief channel, and ensuring that the air in the main oil inlet pipe and the auxiliary oil inlet pipe can be fully squeezed into the cylinder of the drive component. After the oil supply stops, the oil pressure disappears, and the rebound force of the tension spring drives the oil inlet baffle to reset. The oil inlet baffle pulls the guide pin in the opposite direction through the linkage component, so that the hollow cavity part of the guide pin enters the cylinder. The residual air in the cylinder is discharged through the hollow cavity and the exhaust port. After the pressure is released, the closing component and the opening component are reset.

[0021] Preferably, the linkage assembly includes a fixed rod, a pressure relief rotating rod, and a sleeve. One end of the fixed rod is fixedly connected to one side of the housing, the sleeve is rotatably connected to the other end of the fixed rod, the pressure relief rotating rod is slidably connected inside the sleeve, and one end of the pressure relief rotating rod is rotatably connected to the oil inlet baffle.

[0022] The linkage component, which adopts the above technical solution, consists of a fixed rod and a pressure relief rotor. Through rotational connection, a stable lever-type transmission structure is formed. When the oil inlet baffle rotates under the action of oil pressure, the pressure relief rotor rotates and slides synchronously with the fixed rod and the sleeve, accurately transmitting the movement to the guide pin of the pressure relief component. This ensures that the opening and closing action of the oil inlet baffle is strictly synchronized with the sealing and pressure relief action of the guide pin, avoiding sealing failure or incomplete venting due to transmission lag.

[0023] Preferably, a one-way valve is provided on the air outlet.

[0024] By adopting the above technical solution, during the venting stage of the oil injection component, the air in the main oil inlet pipe and the auxiliary oil inlet pipe is squeezed by the oil and enters the cylinder of the drive component through the air outlet. The one-way valve only allows air to flow out of the cylinder through the air outlet in one direction, while preventing air from the cylinder or the external environment from flowing back into the main oil inlet pipe and the auxiliary oil inlet pipe through the air outlet.

[0025] Preferably, a hydrostatic slider is provided at the bottom of the oil outlet, and the hydrostatic slider is connected to the oil outlet.

[0026] By adopting the above technical solution, the oil outlet is directly connected to the hydrostatic slider, and the oil can directly enter the oil chamber of the hydrostatic slider after being discharged from the outlet.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The first piston rod of the opening component and the drive component are directly connected. When air enters the cylinder, the first piston rod drives the guide rod to slide, which in turn drives the opening baffle to slide upward through the cooperation of the lever and the top plate. This design ensures that the oil supply opening action and the process of air entering the cylinder are strictly synchronized. Only when the air has completely entered the cylinder will the opening baffle be pushed up by the lever, ensuring that the oil enters the static pressure slider in a state without air bubble interference, thus ensuring the accuracy of the test data from the source. At the same time as the opening baffle is pushed up, the second piston rod drives the closing component to pop out, forming a coordinated action of opening and releasing, ensuring that the oil outlet is completely unobstructed and that there is no structure to obstruct the flow of oil.

[0028] 2. When oil is injected into the oil inlet, the oil pressure overcomes the tension of the spring and pushes the oil inlet baffle to rotate. The oil inlet baffle, through the linkage component, synchronously drives the guide pin to slide outward, so that the solid part of the guide pin blocks the passage between the cylinder and the outside, ensuring that the pressure relief component is in a sealed state during the oil supply phase, preventing air from leaking from the pressure relief channel in the cylinder, and ensuring that the air in the main oil inlet pipe and the auxiliary oil inlet pipe can be fully squeezed into the cylinder of the drive component. After the oil supply stops, the oil pressure disappears, and the rebound force of the spring drives the oil inlet baffle to reset. The oil inlet baffle, through the linkage component, pulls the guide pin in the opposite direction, so that the hollow cavity part of the guide pin enters the cylinder. The residual air in the cylinder is discharged through the hollow cavity and the exhaust port. After the pressure is released, the closing component and the opening component are reset. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure in the embodiment.

[0030] Figure 2 This is a cross-sectional schematic diagram of the internal structure of the box in the embodiment.

[0031] Figure 3 This is a cross-sectional schematic diagram of the internal structure of the driving component in the embodiment.

[0032] Figure 4 This is a schematic diagram of the structure of the shut-down component in the embodiment.

[0033] Figure 5 This is a schematic diagram of the structure of the oil inlet and the oil inlet baffle in the embodiment.

[0034] Explanation of reference numerals in the attached diagram: 1. Housing; 11. Oil inlet; 111. Oil inlet baffle; 112. Tension spring; 12. Oil outlet; 13. Main oil inlet pipe; 14. Auxiliary oil inlet pipe; 15. Air outlet; 151. Check valve; 16. Distance sensor; 2. Drive assembly; 21. Cylinder block; 22. First piston block; 23. First piston rod; 24. Reset opening; 25. Pressure relief assembly; 251. Guide pin; 252. Limiting plate; 253. Exhaust port; 26. Reset device; 261. Second piston block; 262. Second piston rod; 263. Reset spring; 3. Opening assembly; 31. Guide rod; 32. Toggle lever; 33. Opening baffle; 34. Top plate; 4. Closing assembly; 41. Closing plate; 411. Oil outlet opening; 42. Support rod; 43. Rotating rod; 44. Pressure spring; 45. Guide column; 46. Pressure plate; 461. Guide hole; 47. Drive rod; 5. Linkage assembly; 51. Fixing rod; 52. Pressure relief rotating rod; 53. Sleeve; 6. Static pressure slider. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0036] This application discloses an oil injection assembly for testing the stiffness of a hydrostatic slider oil film. (Refer to...) Figure 1 and Figure 2 The system includes a housing 1, with an oil inlet 11 on one side and multiple oil outlets 12 at the bottom. Inside the housing 1 are a main oil inlet pipe 13 and multiple auxiliary oil inlet pipes 14. One end of the main oil inlet pipe 13 is fixed to the oil inlet 11, and the other end has an air outlet 15 with a drive assembly 2 mounted on it. One end of each auxiliary oil inlet pipe 14 is connected to the main oil inlet pipe 13, and the other end is fixed to the oil outlets 12. Each oil outlet 12 has an opening assembly 3 at its top, comprising a guide rod 31, a lever 32, and an opening baffle 33. A top plate 34 is provided on the outer side of the baffle 33. A closing component 4 is provided on the multiple sets of oil outlets 12. The drive component 2 is connected to the opening component 3 and the closing component 4. The drive component 2 is used to drive the opening component 3 and the closing component 4 to slide. A distance sensor 16 is provided on one side of the housing 1. In the initial state, the closing component 4 closes the oil opening, and the oil flows to the main oil inlet pipe 13 and the multiple sets of auxiliary oil inlet pipes 14, so that the air inside the main oil inlet pipe 13 and the multiple sets of auxiliary oil inlet pipes 14 enters the drive component 2 through the air outlet 15, so that the drive component 2 starts to work. A static pressure slider 6 is provided at the bottom of the oil outlet 12, and the static pressure slider 6 is connected to the oil outlet 12.

[0037] Reference Figure 1 and Figure 3The drive assembly 2 includes a cylinder body 21, a first piston block 22, and a first piston rod 23. One end of the cylinder body 21 has an outlet 15 fixedly connected to it, and a one-way valve 151 is installed on the outlet 15. The first piston block 22 is slidably connected inside the cylinder body 21. One end of the first piston rod 23 is fixedly connected to the piston block. A reset opening 24 is provided on one side of the cylinder body 21, communicating with the cylinder body 21. A reset device 26 is provided inside the reset opening 24, and the reset device 26 includes a second piston block 261 and a second piston rod 23. 62 and reset spring 263, the second piston block 261 is slidably connected inside the reset opening 24, one end of the second piston rod 262 is fixedly connected to one side of the second piston block 261, the reset spring 263 is in its natural state, one end of the reset spring 263 is fixedly connected to the other side of the second piston block 261, and the other end of the reset spring 263 is fixedly connected to the reset opening 24. Air enters the cylinder 21 to drive the second piston block 261 to move outward, so that the second piston rod 262 drives the closing assembly 4 to move.

[0038] A pressure relief assembly 25 is provided on the cylinder 21 above the reset opening 24. The pressure relief assembly 25 includes a guide pin 251, which is inserted through the cylinder 21 and slidably connected to it. Limiting plates 252 are provided at both ends of the guide pin 251. A portion of the guide pin 251 on the outside of the cylinder 21 is a hollow cavity. Exhaust holes 253 are provided on the hollow cavity of the guide pin 251 and on the limiting plates 252 on the outside of the cylinder 21. The solid part of the guide pin 251 slides outward under the action of the air pressure inside the cylinder 21, blocking the passage between the cylinder 21 and the outside, and opening the assembly 3. The guide rod 31 is slidably connected to the outside of the housing 1. One end of the guide rod 31 is fixedly set on the other end of the first piston rod 23. One end of the lever 32 is fixedly connected to the other end of the guide rod 31. The opening baffle 33 is slidably connected to the oil outlet 12. The other end of the lever 32 is set at the lower part of the top plate 34. The air entering the cylinder 21 causes the first piston block 22 to slide upward, which drives the first piston rod 23 to slide upward, causing the guide rod 31 to move upward synchronously. The sliding of the guide rod 31 causes the lever 32 to slide, which causes the opening baffle 33 to move upward. The upward movement of the opening baffle 33 causes the closing component 4 to pop out to one side.

[0039] Reference Figure 1 and Figure 4The closing assembly 4 includes a closing plate 41, a support rod 42, a rotating rod 43, a pressure spring 44, a guide post 45, a pressure plate 46, and a drive rod 47. The closing plate 41 has multiple sets of oil outlets 411 evenly distributed on it, and is slidably disposed in multiple sets of oil outlets 12. One end of the support rod 42 is fixedly connected to one side of the housing 1, and the rotating rod 43 is rotatably connected to the support rod 42. One end of the rotating rod 43 is rotatably connected to one end of the drive rod 47, and the other end of the drive rod 47 is rotatably connected to the second piston rod 262. The pressure plate 46 has a guide hole 461, and one end of the guide post 45 is rotatably connected to the rotating rod 43. At the other end, the other end of the guide post 45 is slidably disposed in the guide hole 461. The pressure spring 44 is sleeved on the guide post 45. One end of the pressure spring 44 is fixedly connected to the rotating rod 43, and the other end of the pressure spring 44 is fixedly connected to one side of the pressure plate 46. One end of the closing plate 41 is fixedly disposed on the other side of the pressure plate 46. When the guide rod 31 drives the rotating rod 43 to rotate, the other end of the rotating rod 43 causes the pressure spring 44 to be pressurized. When the opening component 3 is opened, the pressure plate 46 is ejected to one side by the force of the pressure spring 44, so that the multiple sets of oil outlets 411 are aligned with the multiple sets of oil outlets 12, and the oil enters the static pressure slider 6.

[0040] Reference Figure 1 , Figure 3 and Figure 5 An oil inlet baffle 111 and a tension spring 112 are provided on the oil inlet 11. The oil inlet baffle 111 is rotatably connected to the inside of the oil inlet 11. One end of the tension spring 112 is rotatably connected to one end of the oil inlet baffle 111, and the other end of the tension spring 112 is rotatably connected to the oil inlet 11. A linkage assembly 5 is provided on the oil inlet baffle 111. The oil inlet baffle 111 drives the pressure relief assembly 25 to slide through the linkage assembly 5. The linkage assembly 5 includes a fixed rod 51, a pressure relief rotating rod 52, and a sleeve 53. One end of the fixed rod 51 is fixedly connected to one side of the housing 1, and the sleeve 53 is rotatably connected to the other end of the fixed rod 51. The pressure relief rotating rod 52 is slidably connected inside the sleeve 53. The end is rotatably connected to the oil inlet baffle 111. When oil enters the oil inlet 11, it breaks through the tension of the tension spring 112, causing the oil inlet baffle 111 to rotate. The rotation of the oil inlet baffle 111 drives the pressure relief rod 52 to slide along the sleeve 53, and then the rotation of the sleeve 53 causes the pressure relief assembly 25 to be blocked. When the oil supply stops, the oil inlet baffle 111 is reset by the tension spring 112, causing the pressure relief assembly 25 to slide into the cylinder 21, causing air to leak into the cylinder 21. After the air leaks, the second piston block 261 is reset by the reset spring 263. The second piston rod 262 connected to the second piston block 261 drives the closing assembly 4 to reset. After the closing assembly 4 is reset, the first piston block 22 slides down by gravity, causing the opening assembly 3 to reset.

[0041] The working principle of the oil injection assembly for testing the stiffness of a hydrostatic slider oil film in this application is as follows: When no oil is introduced, the closing plate 41 covers multiple sets of oil outlets 12, and its oil outlet opening 411 is completely misaligned with the oil outlet 12, preventing the oil from flowing downwards. The pressure spring 44 is in a naturally extended state, and the rotating rod 43 and the driving rod 47 are not subjected to external force, maintaining a closed posture. The opening baffle 33 blocks the closing assembly 4 under the action of gravity, and the guide rod 31 and the lever 32 are both in a low position. The first piston block 22 remains at the bottom of the cylinder 21 due to its own weight, the first piston rod 23 has no upward driving force, there is no air pressure inside the cylinder 21, the return spring 263 is in a natural state, and the second piston block 261 and the second piston rod 262 remain inside the return opening 24. The guide pin 251 of the pressure relief assembly 25 is not under pressure, and the cylinder body 21 is connected to the outside through the exhaust port 253. When the oil enters the oil inlet 11, its pressure overcomes the tension of the tension spring 112, pushing the oil inlet baffle 111 to rotate around the rotation point, and the oil smoothly enters the inside of the housing 1. At the same time as the oil inlet baffle 111 rotates, it drives the pressure relief rod 52 to slide along the sleeve 53, pushing the sleeve 53 to rotate around the fixed rod 51, and then driving the guide pin 251 of the pressure relief assembly 25 to slide to the outside of the cylinder body 21. After the guide pin 251 slides, the solid part of the guide pin 251 blocks the passage between the cylinder body 21 and the outside, so that the cylinder body 21 forms a closed space, providing conditions for subsequent air pressure accumulation. The oil entering the housing 1 flows first into the main oil inlet pipe 13, and then through the main inlet... Oil pipe 13 is branched to multiple sets of auxiliary oil inlet pipes 14. When the oil flows in the pipes, it pushes the air in the main oil inlet pipe 13 and auxiliary oil inlet pipes 14 toward the air outlet 15 at the end of the main oil inlet pipe 13. The air enters the cylinder 21 of the drive assembly 2 through the air outlet 15. The one-way valve 151 prevents backflow. The air pressure in the cylinder 21 gradually increases, pushing two key components to move. The first piston block 22 slides upward under air pressure, driving the first piston rod 23 to move upward synchronously, thereby pulling the guide rod 31 of the opening assembly 3 to slide upward. The second piston block 261 moves outward of the reset opening 24 under air pressure, stretching the reset spring 263 and driving the second piston rod 262 to extend outward, driving the drive rod 47 of the closing assembly 4 to move. When the guide rod 31 slides upward... The lever 32 slides upward, and the other end of the lever 32 pushes the top plate 34 upward, causing the baffle 33 to slide upward along the oil outlet 12, releasing the physical constraint on the closing component 4. When the second piston rod 262 extends outward, it pushes the drive rod 47 to make the rotating rod 43 rotate around the support rod 42. After the rotating rod 43 rotates, it causes the guide post 45 to move. The guide post 45 moves towards the pressure plate 46, compressing the pressure spring 44. When the opening component 3 opens, the pressure of the pressure spring 44 causes the closing plate 41 to pop out. When the closing plate 41 pops out, the multiple sets of oil outlets 411 on the closing plate 41 are completely aligned with the multiple sets of oil outlets 12 at the bottom of the housing 1, and the oil circuit is officially opened, allowing the oil in the auxiliary oil inlet pipe 14 to flow into the static pressure slider 6 through the oil outlet 12.When the oil supply to the oil inlet 11 is completed and the oil delivery is stopped, the tension spring 112 returns to its natural state, pulling the oil inlet baffle 111 to rotate in the opposite direction and re-seal the oil inlet 11. When the oil inlet baffle 111 resets, it drives the pressure relief rod 52 to slide in the opposite direction along the sleeve 53. The sleeve 53 rotates back to its initial position around the fixed rod 51, applying a reverse thrust to the guide pin 251, so that the cylinder 21 is connected to the outside through the exhaust hole 253 of the guide pin 251. The internal air leaks out rapidly. After the pressure in the cylinder 21 disappears, the reset spring 263 returns to its natural state, pushing the second piston block 261 to move inward to the inside of the cylinder 21, causing the second piston rod 262 to retract synchronously. When 262 retracts, the drive rod 47 is pulled to rotate in the opposite direction, and the rotating rod 43 rotates back to its initial position around the support rod 42. The pressure spring 44 releases its stored force, pulling the pressure plate 46 to slide in the opposite direction through the guide column 45. The closing plate 41 then resets, and the oil outlet 411 and the oil outlet 12 are misaligned again, cutting off the oil circuit. After the closing component 4 resets, the first piston block 22 loses its air pressure support and slides downward along the cylinder body 21 under its own gravity, causing the first piston rod 23 and the guide rod 31 to move downward synchronously. The lever 32 rotates back to its initial position, and the opening baffle 33 blocks the closing component 4 again under gravity. The device returns to its initial closed state, waiting for the next oil supply cycle.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An oil injection assembly for testing the stiffness of a hydrostatic slider oil film, characterized in that: The system includes a housing (1), with an oil inlet (11) on one side and multiple oil outlets (12) at the bottom. Inside the housing (1) are a main oil inlet pipe (13) and multiple auxiliary oil inlet pipes (14). One end of the main oil inlet pipe (13) is fixed to the oil inlet (11), and the other end of the main oil inlet pipe (13) has an air outlet (15). A drive assembly (2) is mounted on the air outlet (15). One end of each of the auxiliary oil inlet pipes (14) is connected to the main oil inlet pipe. The oil pipe (13) is connected, and the other end of the multiple sets of auxiliary oil inlet pipes (14) is fixedly installed on the oil outlet (12). The top of the multiple sets of oil outlets (12) is provided with an opening component (3), and the multiple sets of oil outlets (12) are provided with a closing component (4). The driving component (2) is connected to the opening component (3) and the closing component (4). The driving component (2) is used to drive the opening component (3) and the closing component (4) to slide. A distance sensor (16) is provided on one side of the housing (1). The drive assembly (2) includes a cylinder (21), a first piston block (22) and a first piston rod (23). One end of the cylinder (21) is fixedly connected to an air outlet (15). The first piston block (22) is slidably connected inside the cylinder (21). One end of the first piston rod (23) is fixedly connected to the piston block. A reset opening (24) is provided on one side of the cylinder (21). The reset opening (24) communicates with the cylinder (21). A pressure relief assembly (25) is provided on the cylinder (21) above the reset opening (24). A reset device (26) is provided inside the reset opening (24). The reset device (26) includes a second piston block (261), a second piston rod (262), and a reset spring (263). The second piston block (261) is slidably connected inside the reset opening (24). One end of the second piston rod (262) is fixedly connected to one side of the second piston block (261). In its natural state, one end of the reset spring (263) is fixedly connected to the other side of the second piston block (261), and the other end of the reset spring (263) is fixedly connected to the reset opening (24). The other end of the second piston rod (262) is provided on the closing assembly (4). The opening assembly (3) includes a guide rod (31), a lever (32), and an opening baffle (33). The guide rod (31) is slidably connected to the outside of the housing (1). One end of the guide rod (31) is fixedly mounted on the other end of the first piston rod (23). One end of the lever (32) is fixedly connected to the other end of the guide rod (31). The opening baffle (33) is slidably connected to the oil outlet (12). A top plate (34) is provided on the outside of the opening baffle (33). The other end of the lever (32) is located at the lower part of the top plate (34). The closing assembly (4) includes a closing plate (41), a support rod (42), a rotating rod (43), a pressure spring (44), a guide column (45), a pressure plate (46), and a drive rod (47). The closing plate (41) has multiple sets of oil outlets evenly arranged on it. The closing plate (41) is slidably disposed in multiple sets of oil outlets (12). One end of the support rod (42) is fixedly connected to one side of the housing (1). The rotating rod (43) is rotatably connected to the support rod (42). One end of the rotating rod (43) is rotatably connected to one end of the drive rod (47). The drive rod (47) is further... One end is rotatably connected to the second piston rod (262), the pressure plate (46) is provided with a guide hole (461), one end of the guide post (45) is rotatably connected to the other end of the rotating rod (43), the other end of the guide post (45) is slidably disposed in the guide hole (461), the pressure spring (44) is sleeved on the guide post (45), one end of the pressure spring (44) is fixedly connected to the rotating rod (43), the other end of the pressure spring (44) is fixedly connected to one side of the pressure plate (46), and one end of the closing plate (41) is fixedly disposed on the other side of the pressure plate (46); The pressure relief assembly (25) includes a guide pin (251), which is disposed through the cylinder body (21). The guide pin (251) is slidably connected to the cylinder body (21). Limiting plates (252) are provided at both ends of the guide pin (251). A portion of the guide pin (251) on the outside of the cylinder body (21) is a hollow cavity. Exhaust holes (253) are provided on the hollow cavity of the guide pin (251) and on the limiting plate (252) on the outside of the cylinder body (21). An oil inlet baffle (111) and a tension spring (112) are provided on the oil inlet (11). The oil inlet baffle (111) is rotatably connected inside the oil inlet (11). One end of the tension spring (112) is rotatably connected to one end of the oil inlet baffle (111), and the other end of the tension spring (112) is rotatably connected to the oil inlet (11). A linkage assembly (5) is provided on the oil inlet baffle (111). The oil inlet baffle (111) drives the pressure relief assembly (25) to slide through the linkage assembly (5). The linkage assembly (5) includes a fixed rod (51), a pressure relief rotating rod (52), and a sleeve (53). One end of the fixed rod (51) is fixedly connected to one side of the housing (1), and the sleeve (53) is rotatably connected to the other end of the fixed rod (51). The pressure relief rotating rod (52) is slidably connected inside the sleeve, and one end of the pressure relief rotating rod (52) is rotatably connected to the oil inlet baffle (111).

2. The oil injection assembly for testing the stiffness of a hydrostatic slider oil film according to claim 1, characterized in that: A one-way valve (151) is provided on the air outlet (15).

3. The oil injection assembly for testing the stiffness of a hydrostatic slider oil film according to claim 1, characterized in that: A hydrostatic slider (6) is provided at the bottom of the oil outlet (12), and the hydrostatic slider (6) is connected to the oil outlet (12).

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