A double-end centrifugal test device for floating oil seal of construction machinery

Abstract

The application discloses a kind of engineering machinery floating oil seal double-head centrifugal test equipment, it is related to mechanical component test technical field, including test assembly and limiting component, the top of test assembly is equipped with opening and closing component, moving assembly and rotating assembly.The application uses, first hydraulic rod in moving assembly drives installation ring to and fro, can drive four opening and closing rack to and fro, and drive four opening and closing gear to and fro rotation, by opening and closing rod drive opening and closing frame to and fro rotation, multiple displacement sensor bodies can be folded simultaneously to the place to be detected, without installing and adjusting displacement sensor one by one, save a lot of time and labor cost, by overall overturning, multiple sensors can be in place simultaneously, multiple displacement sensor bodies can also be quickly rotated and moved away simultaneously, without installing multiple sensors one by one and then disassembling one by one, greatly simplify the operation process, reduce time waste, improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of mechanical component testing technology, specifically to a dual-head centrifugal testing device for floating oil seals in engineering machinery. Background Technology

[0002] Floating oil seals for construction machinery are a common name for floating seals, belonging to the category of mechanical seals within dynamic seals. They typically consist of a pair of wear-resistant metal rings and a pair of rubber rings, primarily used to seal components of construction machinery in harsh working environments with high levels of coal dust, silt, and moisture. The dual-head centrifugal test for mechanical floating oil seals is a performance testing method. By simulating the high-speed rotation conditions of the floating oil seal in actual operation, it is tested on a dual-head centrifugal testing device to evaluate its sealing performance, wear resistance, structural stability, and other indicators under centrifugal force.

[0003] In existing technologies, the use of dual-head centrifugal testing equipment for floating oil seals in engineering machinery requires first installing the floating oil seal in a sealing cavity, then installing the sealing cavity onto the testing equipment, and finally installing multiple displacement sensors around the sealing cavity to monitor the displacement changes of the floating oil seal during operation from different angles. After the test is completed, all the displacement sensors must be removed one by one before the sealing cavity and the floating oil seal can be removed.

[0004] During the centrifugal testing of floating oil seals, multiple displacement sensors need to be installed and then disassembled one by one, which is a cumbersome process that increases the overall operation time and affects the overall testing efficiency. If the disassembly process is not handled properly, the sensors may accidentally collide with the sealing cavity, causing damage to the sensors and affecting the testing accuracy.

[0005] Therefore, we propose a dual-head centrifugal testing device for floating oil seals in engineering machinery to solve the problems mentioned in the background art. Summary of the Invention

[0006] The purpose of this invention is to provide a dual-head centrifugal testing device for floating oil seals in engineering machinery, in order to solve the problems mentioned in the background art, such as the cumbersome installation and disassembly process of multiple displacement sensors during the centrifugal testing of floating oil seals, which increases the overall operation time, affects the overall testing efficiency, and may also damage the sensors and affect the testing accuracy if the operation is improper.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a double-head centrifugal testing device for floating oil seals of engineering machinery, comprising a testing component and a limiting component, wherein the top of the testing component is provided with an opening and closing component, a moving component and a rotating component; The opening and closing assembly includes four opening and closing racks, each of which has an opening and closing gear meshing with its outer surface. Each of the four opening and closing gears has an opening and closing rod fixedly installed inside its interior. Each of the four opening and closing rods has an opening and closing frame fixedly installed on its outer surface. Each of the four opening and closing frames has a displacement sensor body installed inside its interior. The opening and closing frame is used to drive the displacement sensor body to open and close. The test assembly includes a main spindle and a secondary spindle, and a sealed sample is bolted to one end of both the main spindle and the secondary spindle.

[0008] Preferably, the opening and closing assembly further includes four movable frames, the outer surfaces of the four opening and closing racks are respectively movably embedded in the interior of the four movable frames, the outer surfaces on both sides of the four opening and closing racks are provided with sliding grooves, the interior sides of the four movable frames are fixedly installed with sliding rods, one end of the plurality of sliding rods is respectively movably embedded in the interior of the plurality of sliding grooves, and the two ends of the four opening and closing rods are respectively movably embedded in the interior sides of the four movable frames.

[0009] Preferably, the test assembly further includes a test bench and a control system. A drive system is provided on one side of the top of the test bench, and the other end of the main shaft is fixedly connected to the output end of the drive system. A feed system is provided inside the test bench, and a measurement system is provided on the top of the feed system. The other end of the secondary shaft is fixedly installed on the outer surface of one side of the measurement system. An oil injection hole is provided on the outer surface of one of the sealed samples, and a sealing plug is movably embedded inside the oil injection hole.

[0010] Preferably, the test assembly further includes a second hydraulic rod, a movable plate is fixedly installed at the top of the second hydraulic rod, an oil collection box is movably embedded inside the movable plate, an inset groove is provided on the top of the test platform, the outer surfaces of the movable plate and the oil collection box are movably embedded inside the inset groove, the bottom end of the second hydraulic rod is fixedly installed on the bottom surface inside the test platform, and a protective sliding cover is slidably connected to the outer surface of the measurement system.

[0011] Preferably, the movable component includes a ring frame, a mounting ring, and two first hydraulic rods. Movable frames are fixedly mounted on the top and bottom of the ring frame. Four support rods are fixedly mounted on one outer surface of the measuring system. One end of each of the four support rods extends movably through to one outer surface of the two movable frames. The four opening and closing racks are all bolted to one outer surface of the mounting ring. One end of each of the two first hydraulic rods is fixedly mounted on one outer surface of the two movable frames, and the other end of each of the two first hydraulic rods is fixedly mounted on one outer surface of the measuring system.

[0012] Preferably, the rotating assembly includes a ring gear, the outer surface of which has an annular groove, the outer surface of the ring frame is movably embedded in the annular groove, and the outer surface of the mounting ring is fixedly mounted on the inner wall of the ring gear.

[0013] Preferably, the rotating assembly further includes a forward and reverse motor, the output end of which is fixedly mounted with a drive gear, the outer surface of which meshes with the outer surface of the ring gear, the bottom of which is fixedly mounted on the top of the mounting plate, and the moving assembly further includes a mounting plate, one outer surface of which is fixedly mounted on the other outer surface of one of the moving frames.

[0014] Preferably, the limiting component includes a fixing ring, the outer surface of which has an annular groove, a connecting plate is movably embedded inside the annular groove, an annular electromagnet is fixedly installed on one side of the outer surface of the connecting plate, and the inner wall of the fixing ring is fixedly installed on the outer surface of one end of the secondary shaft.

[0015] Preferably, the limiting assembly further includes two electric actuators. One end of each electric actuator is fixedly mounted with an annular plate. A plurality of movable rods are fixedly mounted on one outer surface of the annular plate. One end of each movable rod movably passes through the fixed ring to the interior of the annular groove. One end of each movable rod is fixedly mounted on the other outer surface of the connecting plate. An installation opening is provided on one outer surface of the fixed ring. A compensation block is provided inside the installation opening. The compensation block is connected to the fixed ring by bolts. The other ends of each electric actuator are fixedly mounted on one outer surface of the measuring system near the secondary shaft.

[0016] Preferably, the outer surfaces of the four movable frames are movably embedded in the interior of the annular rotating groove, and a magnetic suction groove is provided on one side of the outer surface of each of the four movable frames. An arc-shaped magnet is provided inside each of the four magnetic suction grooves, and one side of the outer surface of each of the four arc-shaped magnets is magnetically connected to one side of the outer surface of the annular electromagnet.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. In use, the first hydraulic rod in the moving assembly drives the mounting ring to move back and forth, which in turn drives four opening and closing racks to move back and forth, and drives four opening and closing gears to rotate back and forth. The opening and closing rod drives the opening and closing frame to rotate back and forth, which can simultaneously bring multiple displacement sensor bodies to the test location. There is no need to install and adjust the displacement sensors one by one, saving a lot of time and labor costs. By flipping the whole assembly, multiple sensors can be in place at the same time, reducing the positional deviation that may occur due to installing sensors one by one. After the test is completed, multiple displacement sensor bodies can be quickly rotated and moved away at the same time, making room for subsequent disassembly of the floating oil seal and other operations. In the entire testing process, there is no need to install and disassemble multiple sensors one by one, which greatly simplifies the operation process, reduces time waste, improves the reliability and stability of the equipment, makes the entire testing process smoother, and improves work efficiency.

[0018] 2. In use, the feed system is activated, driving the measuring system and the secondary shaft to move, bringing the two floating oil seals into contact. Lubricating oil is injected into the sealing sample through the oil injection hole. The drive system is activated, driving the main shaft to rotate, which in turn rotates the sealing sample and the floating oil seals. Simultaneously, multiple displacement sensors monitor changes in the gap and relative movement of the contact surfaces, transmitting the detected data to the control system. After the test is completed, the second hydraulic rod is activated, pushing the moving plate and the oil collection box upwards. The movement of the feed system causes the two floating oil seals to separate, allowing the lubricating oil in the sealing sample to drip downwards into the oil collection box, collecting the lubricating oil and preventing it from dripping onto the equipment and causing it to become dirty.

[0019] 3. When using this invention, turn off the annular electromagnet, activate the two electric actuators, and pull the annular plate, moving rod, and connecting plate to separate the annular electromagnet from the arc-shaped magnet. This reduces wear between the arc-shaped magnet and the annular electromagnet during subsequent rotation, which could affect the subsequent magnetic adsorption effect. Activate the forward and reverse motors to drive the drive gear, annular gear, mounting ring, and opening / closing rack to rotate, which in turn drives the movable frame to rotate. Adjusting the position of the displacement sensor body allows for detection of the floating oil seal from different angles, obtaining more comprehensive displacement data and thus more accurately evaluating the dynamic performance of the floating oil seal.

[0020] 4. When using this invention, remove the bolts between the opening / closing rack and the mounting ring, remove the bolts between the compensation block and the fixed ring, take out the compensation block, then rotate the movable frame to the mounting port and slide it outwards. Individual small opening / closing components can be removed through the mounting port for individual replacement or maintenance, which is convenient and does not affect the overall normal operation. New small opening / closing components can also be installed, facilitating the installation of other sensors on the new opening / closing frame. Under the action of the movable component, multiple displacement sensor bodies and other sensors can be opened and closed, making it more flexible and versatile with better applicability. Activating the ring electromagnet generates magnetic attraction, tightly attracting the arc-shaped magnet, thereby fixing the movable frame, improving the stability of the opening / closing component, and facilitating better sensor detection. Attached Figure Description

[0021] Figure 1 This is a front perspective view of a dual-head centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 2 This is a three-dimensional view of the structure of the moving plate in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 3 This is a three-dimensional view of the opening and closing component in a dual-head centrifugal testing device for floating oil seals in engineering machinery according to the present invention. Figure 4 This is a cross-sectional schematic diagram of the moving component in a dual-head centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 5 This is a cross-sectional schematic diagram of the rotating component in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 6 This is a cross-sectional schematic diagram of the fixed ring structure in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 7 This is a cross-sectional schematic diagram of the ring gear in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 8 This is a cross-sectional schematic diagram of the compensation block in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 9 This is a cross-sectional schematic diagram of the limiting component in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention; Figure 10 This is a schematic diagram from another angle of the opening and closing component in a double-headed centrifugal testing device for floating oil seals in engineering machinery according to the present invention.

[0022] In the picture: 1. Test Components; 101. Test Stand; 102. Control System; 103. Drive System; 104. Feed System; 105. Measurement System; 106. Protective Sliding Cover; 107. Main Spindle; 108. Counterspindle; 109. Sealed Sample; 110. Oil Injection Hole; 111. Sealing Plug; 112. Embedded Groove; 113. Second Hydraulic Rod; 114. Moving Plate; 115. Oil Collection Box; 2. Opening and Closing Components; 201. Opening and Closing Rack; 202. Movable Frame; 203. Opening and Closing Rod; 204. Opening and Closing Gear; 205. Opening and Closing Frame; 206. Displacement Sensor Body; 207. Slide Groove; 20 8. Slide rod; 209. Magnetic groove; 210. Arc magnet; 3. Moving assembly; 301. Ring frame; 302. Moving frame; 303. First hydraulic rod; 304. Support rod; 305. Mounting plate; 306. Mounting ring; 4. Rotating assembly; 401. Forward and reverse motor; 402. Drive gear; 403. Ring gear; 404. Ring groove; 5. Limiting assembly; 501. Fixing ring; 502. Annular rotating groove; 503. Connecting plate; 504. Annular electromagnet; 505. Electric push rod; 506. Annular plate; 507. Moving rod; 508. Mounting port; 509. Compensation block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and 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.

[0024] Example 1: Please refer to Figures 1-10As shown, the present invention provides a technical solution: a double-headed centrifugal testing device for floating oil seals in engineering machinery, comprising a testing component 1 and a limiting component 5. The top of the testing component 1 is provided with an opening and closing component 2, a moving component 3, and a rotating component 4. The opening and closing component 2 includes four opening and closing racks 201, each with an opening and closing gear 204 meshing on its outer surface. Each of the four opening and closing gears 204 has an opening and closing rod 203 fixedly installed inside, and each of the four opening and closing rods 203 has an opening and closing frame 205 fixedly installed on its outer surface. Each of the four opening and closing frames 205 has a displacement sensor body 206 installed inside, and the opening and closing frame 205 is used to drive the displacement sensor body 206 to unfold and close. The testing component 1 includes a main shaft 107 and a secondary shaft 108. One end of each of the four spindles 108 is bolted to a sealing sample 109. The opening and closing assembly 2 also includes four movable frames 202. The outer surfaces of the four opening and closing racks 201 are respectively movably embedded in the interior of the four movable frames 202. The outer surfaces of both sides of the four opening and closing racks 201 are provided with sliding grooves 207. The two sides of the interior of the four movable frames 202 are fixedly installed with sliding rods 208. One end of the multiple sliding rods 208 is respectively movably embedded in the interior of the multiple sliding grooves 207. The two ends of the four opening and closing rods 203 are respectively movably embedded in the two sides of the interior of the four movable frames 202. The test assembly 1 also includes a test bench 101 and a control system 102. A drive system 103 is provided on one side of the top of the test bench 101. The other end of the spindle 107 is fixed to the output end of the drive system 103. The test bench 101 is connected to a feed system 104, with a measuring system 105 mounted on top of the feed system 104. The other end of a secondary shaft 108 is fixedly mounted on the outer surface of one side of the measuring system 105. An oil injection hole 110 is provided on the outer surface of one of the sealed samples 109, and a sealing plug 111 is movably embedded inside the oil injection hole 110. The test assembly 1 also includes a second hydraulic rod 113, with a movable plate 114 fixedly mounted on its top. An oil collection box 115 is movably embedded inside the movable plate 114. An inset groove 112 is provided on the top of the test bench 101, and the outer surfaces of both the movable plate 114 and the oil collection box 115 are movably embedded inside the inset groove 112. The bottom end of the second hydraulic rod 113 is fixedly mounted on the test bench. Inside the bottom surface of 101, a protective sliding cover 106 is slidably connected to the outer surface of the measuring system 105. The moving component 3 includes a ring frame 301, a mounting ring 306, and two first hydraulic rods 303. Moving frames 302 are fixedly installed on the top and bottom of the ring frame 301. Four support rods 304 are fixedly installed on one side of the outer surface of the measuring system 105. One end of each of the four support rods 304 extends movably through to one side of the outer surface of the two moving frames 302. Four opening and closing racks 201 are all bolted to one side of the outer surface of the mounting ring 306. One end of each of the two first hydraulic rods 303 is fixedly installed on one side of the outer surface of the two moving frames 302, and the other end of each of the two first hydraulic rods 303 is fixedly installed on one side of the outer surface of the measuring system 105.

[0025] In this embodiment, during use, the outer surface of the secondary shaft 108 is movably embedded inside the mounting ring 306 and the annular plate 506, and the outer surface of one end of the secondary shaft 108 is fixedly installed inside the fixing ring 501. The drive system 103, feed system 104, measuring system 105, second hydraulic rod 113, displacement sensor body 206, first hydraulic rod 303, forward / reverse motor 401, annular electromagnet 504, electric actuator 505, and control system 102 are electrically connected. The initial state of the opening / closing assembly 2 is as follows... Figure 3 As shown, the four opening and closing frames 205 are in the open state. Two floating oil seals are respectively installed into two sealing samples 109. Then, the sealing sample 109 with the sealing plug 111 is first installed onto one end of the sub-shaft 108, followed by the other sealing sample 109 being installed onto one end of the main shaft 107. The feed system 104 is started, driving the measuring system 105, protective sliding cover 106, opening and closing assembly 2, moving assembly 3, rotating assembly 4, and sub-shaft 108 to move together, pushing the left sealing sample 109 towards the right sealing sample 109, thus ensuring tight contact between the two floating oil seals. Then, the sealing plug 111 is opened, and lubricating oil is injected into the sealing sample 109 through the oil injection hole 110. Next, the two first hydraulic rods 303 are activated, pulling the two movable frames 302 and the ring frame 301 to the left. This causes the ring gear 403 and the mounting ring 306 to move to the left on the outer surface of the secondary shaft 108, and also causes the four opening and closing racks 201 to move to the left inside their respective movable frames 202. At the same time, this causes the corresponding opening and closing gears 204 to rotate. The opening and closing gears 204 are fixedly installed on the outer surface of the opening and closing rod 203, which causes the opening and closing rod 203 to rotate inside the movable frame 202. This further causes the opening and closing frame 205 to rotate around the opening and closing rod 203 as the axis toward the sealing sample 109. At this time, the four opening and closing frames 205 cause the four displacement sensor bodies 206 to close toward the sealing sample 109. When the two first hydraulic rods 303 automatically close, the four displacement sensor bodies 206 are just closed at the contact surface of the two floating oil seals. Figure 10As shown, it is not necessary to install multiple displacement sensor bodies 206 one by one. After the preparation is completed, the drive system 103 is started, driving the main shaft 107 to rotate, which in turn drives the corresponding sealing sample 109 and floating oil seal to rotate. At the same time, multiple displacement sensor bodies 206 are started to monitor the gap change and relative movement of the contact surface, and transmit the detected information to the control system 102. The operator can see the relevant test data monitored and recorded through the control system 102 to complete the floating oil seal test. After the centrifugal test is completed, the two first hydraulic rods 303 are started again. At this time, the two first hydraulic rods 303 push the moving frame 302, the ring frame 301, the ring gear 403, the mounting ring 306 and the four opening and closing racks 201 to move to the right, which in turn drives the four opening and closing gears 204 to rotate in the opposite direction, causing the opening and closing frame 205 to rotate in the opposite direction. At this time, the four opening and closing frames 205 drive the four displacement sensor bodies 206 to rotate in the opposite direction and open, leaving the sealing sample 109 and returning to the initial state. Activate the second hydraulic rod 113 to push the moving plate 114 and oil collection box 115 upwards to below the two sealing samples 109. Reactivate the feed system 104, causing the measuring system 105 and the sub-shaft 108 to move to the left and reset, separating the two floating oil seals. At this point, the lubricating oil in the two sealing samples 109 drips downwards into the oil collection box 115, collecting the lubricating oil and preventing it from dripping onto the equipment and causing it to become dirty. The operator can then remove the oil collection box 115 from the moving plate 114 to clean the lubricating oil. Finally, remove the sealing sample 109 from the main shaft 107 and then remove the sealing sample 109 from the sub-shaft 108. With the help of the opening and closing component 2, multiple displacement sensor bodies 206 can be simultaneously closed to the testing location, eliminating the need to install and adjust each displacement sensor individually, saving significant time and labor costs. Through overall flipping, multiple sensors can be positioned simultaneously, reducing potential positional deviations caused by individual sensor installation. After testing, multiple displacement sensor bodies 206 can be quickly rotated away from the testing location, freeing up space for subsequent disassembly of the floating oil seal and other operations. Throughout the testing process, there is no need to install and disassemble multiple sensors one by one, greatly simplifying the operation, reducing time waste, lowering the risk of sensor damage or equipment failure due to improper operation, improving equipment reliability and stability, making the entire testing process smoother, and increasing work efficiency. This solves the problem of cumbersome installation and disassembly of multiple displacement sensors during centrifugal testing of floating oil seals, which increases overall operation time, affects overall testing efficiency, and can even damage sensors and affect testing accuracy if operated improperly.

[0026] Example 2: Figures 3-9As shown, the limiting assembly 5 includes a fixed ring 501, with an annular groove 502 on its outer surface. A connecting plate 503 is movably embedded inside the annular groove 502. An annular electromagnet 504 is fixedly installed on one side of the outer surface of the connecting plate 503. The inner wall of the fixed ring 501 is fixedly installed on the outer surface of one end of the secondary shaft 108. The limiting assembly 5 also includes two electric push rods 505, with an annular plate 506 fixedly installed on one end of each electric push rod 505. Multiple moving rods 507 are fixedly installed on one side of the outer surface of the annular plate 506. The rotating assembly 4 includes an annular gear 403. The outer surface of the annular gear 403... The annular groove 404 is provided on the surface of the ring frame 301, which is movably embedded in the annular groove 404. The outer surface of the mounting ring 306 is fixedly installed on the inner wall of the ring gear 403. The rotating assembly 4 also includes a forward and reverse motor 401. The output end of the forward and reverse motor 401 is fixedly installed with a drive gear 402. The outer surface of the drive gear 402 meshes with the outer surface of the ring gear 403. The bottom of the forward and reverse motor 401 is fixedly installed on the top of the mounting plate 305. The moving assembly 3 also includes a mounting plate 305. One outer surface of the mounting plate 305 is fixedly installed on the other outer surface of one of the moving frames 302.

[0027] In this embodiment, during use, the annular electromagnet 504 is turned off, causing the magnetism between the annular electromagnet 504 and the four arc-shaped magnets 210 to disappear. Two electric actuators 505 are activated, pulling the annular plate 506 and multiple moving rods 507 to move, causing the connecting plate 503 to move within the annular rotating groove 502. This separates the annular electromagnet 504 from the four arc-shaped magnets 210, reducing wear between the arc-shaped magnets 210 and the annular electromagnet 504 during subsequent rotation, which would affect the subsequent magnetic adsorption effect. The forward and reverse motor 401 is started, and the output end of the forward and reverse motor 401 drives the drive gear 402 to rotate, which in turn drives the ring gear 403 to rotate inside the ring frame 301. This, in turn, drives the mounting ring 306 and the four opening and closing racks 201 to rotate. The opening and closing racks 201 are embedded in the movable frame 202. As the four opening and closing racks 201 rotate, they drive the four movable frames 202 to rotate inside the annular rotating groove 502. This further drives the four opening and closing frames 205 and the displacement sensor body 206 to rotate, thereby adjusting the position of the displacement sensor body 206. This allows the floating oil seal to be detected from different angles, obtaining more comprehensive displacement data and thus more accurately evaluating the dynamic performance of the floating oil seal.

[0028] Example 3: Figure 4 and Figures 6-9As shown, the test assembly 1 has an opening and closing assembly 2, a moving assembly 3, and a rotating assembly 4 on its top. The limiting assembly 5 includes a fixed ring 501, with an annular groove 502 on its outer surface. A connecting plate 503 is movably embedded inside the annular groove 502. An annular electromagnet 504 is fixedly installed on one side of the outer surface of the connecting plate 503. The inner wall of the fixed ring 501 is fixedly installed on the outer surface of one end of the secondary shaft 108. The limiting assembly 5 also includes two electric push rods 505. An annular plate 506 is fixedly installed on one end of each electric push rod 505. Multiple moving rods 507 are fixedly installed on one side of the outer surface of the annular plate 506. One end of each moving rod 507 movably passes through the fixed ring 501 into the annular groove 502. One end of each movable rod 507 is fixedly installed on the outer surface of the other side of the connecting plate 503. An installation port 508 is opened on one side of the outer surface of the fixing ring 501. A compensation block 509 is set inside the installation port 508. The compensation block 509 is connected to the fixing ring 501 by bolts. The other ends of each of the two electric push rods 505 are fixedly installed on one side of the outer surface of the measuring system 105 near the sub-shaft 108. The outer surfaces of the four movable frames 202 are movably embedded inside the annular rotating groove 502. A magnetic suction groove 209 is opened on one side of the outer surface of each of the four movable frames 202. An arc-shaped magnet 210 is set inside the four magnetic suction grooves 209. One side of the outer surface of each of the four arc-shaped magnets 210 is magnetically connected to one side of the outer surface of the annular electromagnet 504.

[0029] In this embodiment, during use, the annular electromagnet 504 is turned off, and the electric push rod 505 is activated to pull the connecting plate 503 to move, thus separating the annular electromagnet 504 from the four arc-shaped magnets 210. The bolts connecting the opening / closing rack 201 and the mounting ring 306 are removed, and then the bolts connecting the compensation block 509 and the fixed ring 501 are removed, allowing the compensation block 509 to be removed from the mounting port 508. Then, the movable frame 202 is rotated to the mounting port 508 and slid outwards, allowing the movable frame 202 and the opening / closing rack 201 to be removed together from the outer surface of the sub-shaft 108. The opening / closing assembly 2 can be divided into four small units, each consisting of an opening / closing rack 201, a movable frame 202, and an opening / closing frame 205. Individual units of the opening / closing assembly 2 can be removed or new units can be installed through the mounting port 508. By removing the individual small opening and closing assembly 2, it can be replaced or maintained separately, which is convenient and does not affect the normal operation of the whole. The outer surface of the mounting ring 306 has many mounting holes. By installing the individual small opening and closing assembly 2 separately and fixing the opening and closing rack 201 within it to the mounting ring 306 with bolts, it is convenient for workers to install other sensors on the new opening and closing frame 205. Under the action of the moving assembly 3, multiple displacement sensor bodies 206 and other sensors can be opened and closed, making it more flexible, versatile, and applicable. Re-activating the electric actuator 505 pushes the annular plate 506, the moving rod 507, and the connecting plate 503 to move, causing the annular electromagnet 504 to contact the arc-shaped magnet 210 again. Then, activating the annular electromagnet 504 generates magnetic attraction, tightly attracting the arc-shaped magnet 210, thereby fixing the movable frame 202, improving the stability of the opening and closing assembly 2, and facilitating better sensor detection.

[0030] The overall mechanism works as follows: Two floating oil seals are installed into two sealing specimens 109 respectively. Then, the sealing specimen 109 with the sealing plug 111 is first installed onto one end of the secondary shaft 108, followed by the other sealing specimen 109 being installed onto one end of the main shaft 107. The feed system 104 is activated, driving the measuring system 105 and the secondary shaft 108 to move together, pushing the left sealing specimen 109 towards the right sealing specimen 109, ensuring tight contact between the two floating oil seals. Then, the sealing plug 111 is opened, and lubricating oil is injected into the sealing specimen 109 through the oil injection hole 110. Next, the two first hydraulic rods 303 are activated, pulling the two moving frames 302, the ring frame 301, the ring gear 403, and the mounting ring 306 to the left. This moves the four opening and closing racks 201 to the left, causing the opening and closing gear 204 to rotate, which in turn rotates the opening and closing rod 203. This causes the opening and closing frame 205 to rotate around the opening and closing rod 203 as its axis towards the sealing sample 109. At this time, the four displacement sensor bodies 206 close towards the sealing sample 109. When the two first hydraulic rods 303 automatically close, the four displacement sensor bodies 206 are exactly closed at the contact surface of the two floating oil seals. After the preparation work is completed, the drive system 103 is activated, driving the main shaft 107 to rotate, which in turn rotates the corresponding sealing sample 109 and the floating oil seal. At the same time, multiple displacement sensor bodies 206 are activated to monitor the changes in the gap and relative movement of the contact surface, and transmit the detected data to the control system 102. The operator can view the monitored and recorded test data through the control system 102. After the test, the two first hydraulic rods 303 are restarted. This pushes the opening and closing rack 201 to the right, causing the four opening and closing gears 204 to rotate in the opposite direction. Simultaneously, the four opening and closing frames 205 cause the four displacement sensor bodies 206 to rotate in the opposite direction and open, leaving the sealing sample 109 and returning to the initial state. The second hydraulic rod 113 is then activated, pushing the moving plate 114 and oil collection box 115 upwards to below the two sealing samples 109. The feed system 104 is restarted, causing the measuring system 105 and the sub-shaft 108 to move to the left and reset, separating the two floating oil seals. The lubricating oil in the two sealing samples 109 drips downwards into the oil collection box 115. Finally, the sealing samples 109 on the main shaft 107 and sub-shaft 108 are removed sequentially. When the annular electromagnet 504 is closed, its magnetism disappears. The two electric actuators 505 are activated, pulling the annular plate 506, the moving rod 507, and the connecting plate 503, causing the annular electromagnet 504 to separate from the four arc-shaped magnets 210. The forward and reverse motor 401 is then activated, driving the drive gear 402 and the annular gear 403 to rotate, which in turn drives the mounting ring 306 and the four opening and closing racks 201 to rotate. This further drives the four movable frames 202 to rotate inside the annular groove 502, adjusting the position of the displacement sensor body 206.Reactivate the electric actuator 505 to move the annular plate 506, the moving rod 507, and the connecting plate 503, so that the annular electromagnet 504 comes into contact with the arc magnet 210 again. Then activate the annular electromagnet 504 to generate magnetic attraction, which tightly attracts the arc magnet 210, thereby fixing the movable frame 202.

[0031] Among them, the control system 102, drive system 103, feed system 104, measurement system 105, second hydraulic rod 113, displacement sensor body 206, first hydraulic rod 303, forward and reverse motor 401, ring electromagnet 504 and electric push rod 505 are all existing technologies, and their components and operating principles are all publicly available technologies, which will not be explained in detail here.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A dual-head centrifugal testing device for floating oil seals in engineering machinery, comprising a testing component (1) and a limiting component (5), characterized in that: The test component (1) is provided with an opening and closing component (2), a moving component (3) and a rotating component (4) on its top. The opening and closing assembly (2) includes four opening and closing racks (201), and opening and closing gears (204) are meshed on the outer surfaces of the four opening and closing racks (201). Opening and closing rods (203) are fixedly installed inside the four opening and closing gears (204). Opening and closing frames (205) are fixedly installed on the outer surfaces of the four opening and closing rods (203). Displacement sensor bodies (206) are provided inside the four opening and closing frames (205). The opening and closing frames (205) are used to drive the displacement sensor bodies (206) to open and close. The test assembly (1) includes a main shaft (107) and a secondary shaft (108), and a sealing sample (109) is bolted to one end of both the main shaft (107) and the secondary shaft (108). The opening and closing assembly (2) also includes four movable frames (202). The outer surfaces of the four opening and closing racks (201) are respectively movably embedded in the interior of the four movable frames (202). The outer surfaces on both sides of the four opening and closing racks (201) are provided with sliding grooves (207). The two sides inside the four movable frames (202) are fixedly installed with sliding rods (208). One end of the multiple sliding rods (208) is respectively movably embedded in the interior of the multiple sliding grooves (207). The two ends of the four opening and closing rods (203) are respectively movably embedded in the two sides inside the four movable frames (202). The test assembly (1) also includes a test bench (101) and a control system (102). A drive system (103) is provided on one side of the top of the test bench (101). The other end of the main shaft (107) is fixedly connected to the output end of the drive system (103). A feed system (104) is provided inside the test bench (101). A measurement system (105) is provided on the top of the feed system (104). The other end of the secondary shaft (108) is fixedly installed on the outer surface of one side of the measurement system (105). An oil injection hole (110) is provided on the outer surface of one of the sealing samples (109). A sealing plug (111) is movably embedded inside the oil injection hole (110). The limiting component (5) includes a fixing ring (501), an annular groove (502) is provided on the outer surface of the fixing ring (501), a connecting plate (503) is movably embedded in the annular groove (502), an annular electromagnet (504) is fixedly installed on one side of the outer surface of the connecting plate (503), and the inner wall of the fixing ring (501) is fixedly installed on the outer surface of one end of the secondary shaft (108). The limiting assembly (5) also includes two electric actuators (505). One end of each electric actuator (505) is fixedly mounted with an annular plate (506). Multiple movable rods (507) are fixedly mounted on one side of the outer surface of the annular plate (506). One end of each movable rod (507) movably passes through the fixed ring (501) to the inside of the annular groove (502). One end of each movable rod (507) is fixedly mounted on the other side of the outer surface of the connecting plate (503). An installation port (508) is opened on one side of the outer surface of the fixed ring (501). A compensation block (509) is set inside the installation port (508). The compensation block (509) is connected to the fixed ring (501) by bolts. The other ends of each electric actuator (505) are fixedly mounted on one side of the outer surface of the measuring system (105) near the sub-shaft (108).

2. The dual-head centrifugal testing device for floating oil seals in engineering machinery according to claim 1, characterized in that: The test assembly (1) also includes a second hydraulic rod (113), a movable plate (114) is fixedly installed at the top of the second hydraulic rod (113), an oil collection box (115) is movably embedded inside the movable plate (114), an inset groove (112) is opened at the top of the test platform (101), the outer surfaces of the movable plate (114) and the oil collection box (115) are movably embedded inside the inset groove (112), the bottom end of the second hydraulic rod (113) is fixedly installed on the bottom surface inside the test platform (101), and a protective sliding cover (106) is slidably connected to the outer surface of the measurement system (105).

3. The dual-head centrifugal testing device for floating oil seals in engineering machinery according to claim 1, characterized in that: The moving component (3) includes a ring frame (301), a mounting ring (306), and two first hydraulic rods (303). The top and bottom of the ring frame (301) are fixedly mounted with moving frames (302). Four support rods (304) are fixedly mounted on one side of the outer surface of the measuring system (105). One end of each of the four support rods (304) extends movably through to one side of the outer surface of the two moving frames (302). The four opening and closing racks (201) are all bolted to one side of the outer surface of the mounting ring (306). One end of each of the two first hydraulic rods (303) is fixedly mounted on one side of the outer surface of the two moving frames (302), and the other end of each of the two first hydraulic rods (303) is fixedly mounted on one side of the outer surface of the measuring system (105).

4. The dual-head centrifugal testing device for floating oil seals in engineering machinery according to claim 3, characterized in that: The rotating assembly (4) includes a ring gear (403), the outer surface of which is provided with an annular groove (404), the outer surface of the ring frame (301) is movably embedded in the interior of the annular groove (404), and the outer surface of the mounting ring (306) is fixedly mounted on the inner wall of the ring gear (403).

5. The engineering machinery floating oil seal dual-head centrifugal testing device according to claim 4, characterized in that: The rotating assembly (4) also includes a forward and reverse motor (401), the output end of which is fixedly mounted with a drive gear (402), the outer surface of which meshes with the outer surface of the ring gear (403), the bottom of which is fixedly mounted on the top of the mounting plate (305), and the moving assembly (3) also includes a mounting plate (305), one side of which is fixedly mounted on the other side of one of the moving frames (302).

6. The dual-head centrifugal testing device for floating oil seals in engineering machinery according to claim 1, characterized in that: The outer surfaces of the four movable frames (202) are movably embedded in the interior of the annular rotating groove (502). A magnetic suction groove (209) is opened on one side of the outer surface of the four movable frames (202). An arc-shaped magnet (210) is provided inside the four magnetic suction grooves (209). One side of the outer surface of the four arc-shaped magnets (210) is magnetically connected to one side of the outer surface of the annular electromagnet (504).

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