A cylinder liner piston ring wear test device

Abstract

The present invention relates to the technical field of piston ring wear test, and discloses a cylinder liner piston ring wear test device, which includes a frame, a wear detection unit, a pneumatic drive unit, a loss cleaning unit and a loss collection unit; wherein, an oil box is fixed on the frame, a drive module is installed on the frame, and the drive end of the drive module is connected to a piston clamp. When the drive module operates, it drives the piston clamp to move reciprocally. The present invention realizes the automatic cleaning of the inner wall of the grinding cylinder. This design not only avoids the test error caused by debris residue, but also ensures the test accuracy of the wear test device for the piston ring. The cleaning process is automated and does not require manual intervention.

Description

Technical Field

[0001] The invention relates to the technical field of piston ring wear testing, in particular to a cylinder sleeve piston ring wear testing device. Background Art

[0002] In the field of automation, the piston ring wear test of the servo cylinder is a key quality control link. It helps to evaluate the durability and performance of the piston ring, thereby ensuring the stability and reliability of the servo cylinder. The main purpose of the servo cylinder piston ring wear test is to simulate the piston ring wear under actual working conditions to evaluate the wear resistance, sealing and service life of the piston ring.

[0003] After searching, the Chinese patent with announcement number CN109738317B discloses a cylinder liner-piston ring friction and wear test device, including: a piston rod, a cylinder liner, a cylinder body clamping mechanism, a lifting mechanism, a crankshaft, a piston ring, a plug ring clamping mechanism, a guide seat and an inner radial adjustment mechanism, the piston rod extends into the cylinder liner, the inner radial adjustment mechanism is fixed on the piston rod, the plug ring clamping mechanism is arranged on the inner radial adjustment mechanism, the piston ring is installed on the plug ring clamping mechanism, and the piston ring contacts the inner wall surface of the cylinder liner; the cylinder liner is fixed on the cylinder body clamping mechanism, the cylinder body clamping mechanism is connected to the lifting mechanism, the end of the piston rod extending out of the cylinder liner opening penetrates into the guide seat, and the crankshaft contacts the end of the piston rod penetrated into the guide seat. The above scheme can perform cylinder liner-piston ring friction and wear tests on stepped cylinder liners of different levels and piston rings of different specifications. However, the above scheme still has the following shortcomings when it is actually used:

[0004] The cylinder piston ring wear test device proposed in the above scheme cannot handle the debris generated during the piston ring wear process. These debris may be retained inside the test device and cause pollution to the test environment. The debris generated by piston ring wear usually includes metal particles, carbides and other impurities. The accumulation of these substances in the test environment will interfere with the accurate observation and evaluation of the piston ring wear. At the same time, the retention of debris may also cause secondary wear, that is, the debris forms abrasives between the piston ring and the cylinder liner, accelerating the wear process of both, thereby affecting the accuracy of the test results.

[0005] Therefore, it is necessary to design a cylinder liner and piston ring wear test device to solve the above problems. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a cylinder liner and piston ring wear test device.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A cylinder liner and piston ring wear test device, comprising a frame, a wear detection unit, a pneumatic drive unit, a wear cleaning unit and a wear collection unit;

[0009] Wherein, an oil box is fixed on the frame, a driving module is installed on the frame, a driving end of the driving module is connected to the piston fixture, and the driving module drives the piston fixture to reciprocate when it is running;

[0010] The wear detection unit includes a grinding cylinder, a linear slide and a linear slide seat, wherein the linear slide rail is arranged on a frame, the linear slide seat is slidably assembled on the linear slide rail, the grinding cylinder is fixed on the top surface of the linear slide seat, and the grinding cylinder is arranged opposite to the piston fixture, and both ends of the grinding cylinder are open, and when the piston fixture reciprocates, the piston is driven to reciprocate inside the grinding cylinder to perform a wear test on the piston ring;

[0011] The pneumatic drive unit includes an air storage component, a pushing component, a cleaning component and a rotating component, and the cleaning component is composed of a rotating part, a brush part, a connecting part and a traction part;

[0012] The loss collection unit is arranged on the top surface of the frame and is used to collect the loss generated by the piston ring wear test.

[0013] As a preferred technical solution of the present invention, the wear detection unit also includes a connecting ring, a screw cap, two first connecting pipes and two first one-way valves. The connecting ring is fixed to the end of the grinding cylinder away from the piston clamp, and an external thread is provided on the connecting ring. The inner ring of the screw cap is provided with a thread groove. The screw cap is threadedly sleeved on the connecting ring. One end of the two first connecting pipes is connected to the inside of the screw cap. The two first one-way valves are respectively installed on the two first connecting pipes. The flow limiting directions of the two first one-way valves are opposite. One of the first connecting pipes is connected to the external environment for extracting ambient air.

[0014] As a preferred technical solution of the present invention, the gas storage assembly includes a gas storage tank, a first sliding plug and a first spring. The gas storage tank is fixed on a frame. The first sliding plug is sealingly and slidingly connected inside the gas storage tank. One end of the first spring is connected to the inner surface of the gas storage tank, and the other end is connected to the first sliding plug. The gas storage tank is connected to one end of another first connecting pipe away from the screw cap.

[0015] As a preferred technical solution of the present invention, the pushing assembly includes an exhaust pipe, a second sliding plug, a first connecting rod and an air duct. The exhaust pipe is fixed to the frame through a bracket, the second sliding plug is sealingly and slidingly connected to the inside of the exhaust pipe, one end of the first connecting rod is fixedly connected to the second sliding plug, and a hole matching the first connecting rod is opened at the end position of the exhaust pipe, the other end of the first connecting rod extends to the outside of the exhaust pipe through the hole, one end of the air duct is connected to the air storage tank, and the other end is connected to the exhaust pipe, and a control valve is installed on the air duct.

[0016] As a preferred technical solution of the present invention, the rotating part includes a gear frame, a first rotating shaft, a first gear and a rotating roller. The gear frame is fixed to one end of the first connecting rod located outside the exhaust pipe. The first rotating shaft is rotatably assembled on the gear frame. The first gear is fixedly sleeved on the first rotating shaft. The rotating roller is fixedly connected to the first rotating shaft. A first chamber is opened inside the rotating roller, and a second chamber is opened inside the first rotating shaft. The first chamber and the second chamber are connected. A plurality of suction holes connected to the first chamber are opened on the outer circumference of the rotating roller.

[0017] As a preferred technical solution of the present invention, the brush part is composed of a plurality of brush members, the plurality of brush members are evenly arranged on the outer peripheral surface of the rotating roller, the plurality of brush members are divided into a plurality of rows, the brush members in each row are arranged along the axis direction of the rotating roller, and the plurality of rows of brush members are distributed in a circumferential array;

[0018] Each of the brush parts includes two side plates, a rotating plate, a pin shaft and bristles. The two side plates are fixed on the outer circumference of the rotating roller. The rotating plate is rotatably assembled between the two side plates through the pin shaft, and the bristles are fixed at the end position of the rotating plate.

[0019] As a preferred technical solution of the present invention, the connecting part includes a sliding ring, a plurality of first pull ropes, a plurality of second pull ropes and a magnetic ring, the magnetic ring is fixedly sleeved at the end position of the rotating roller, the sliding ring is slidably sleeved on the rotating roller, and the sliding ring is made of magnetic material, a plurality of rotating plates close to the sliding ring are connected to the sliding ring through the first pull ropes, and two adjacent rotating plates in the same row are connected through the second pull ropes.

[0020] As a preferred technical solution of the present invention, the traction part includes a fixed ring, a sliding sleeve, an outer cylinder and an inner rod. The fixed ring is sleeved on the sliding ring, and the fixed ring is connected to the sliding ring through a plurality of connecting rods. The sliding sleeve is slidably sleeved on the fixed ring, and a avoidance opening for avoiding a plurality of connecting rods is provided on the sliding sleeve. The outer cylinder is fixed on the exhaust pipe, and the inner rod is slidably arranged in the outer cylinder. One end of the inner rod extends to the outside of the outer cylinder and is fixedly connected to the sliding sleeve. The outer cylinder is provided with a limit opening arranged along the length direction of the outer cylinder, and a limit block is fixed on the inner rod, and the limit block is slidably arranged in the limit opening.

[0021] As a preferred technical solution of the present invention, the rotating assembly includes a second rotating shaft, a second gear, a guide plate, a fixed rod and a ball. The second rotating shaft is rotatably installed on the gear frame. The second gear is fixedly sleeved on the second rotating shaft. The second gear and the first gear are meshed with each other. The guide plate is fixed on the second rotating shaft. The guide plate is a spiral structure. The fixed rod is fixed in the oil box. The ball is assembled at the end of the fixed rod away from the oil box, and the ball is arranged opposite to the guide plate.

[0022] As a preferred technical solution of the present invention, the loss collection unit includes an air suction cylinder, a third sliding plug, a second connecting rod, two second connecting pipes, two second one-way valves, a rotary joint and a collection box, the air suction cylinder is fixed on the outer circumferential surface of the exhaust cylinder, the third sliding plug is sealingly and slidingly connected inside the air suction cylinder, one end of the second connecting rod is fixedly connected to the third sliding plug, the other end of the second connecting rod extends to the outside of the air suction cylinder and is fixedly connected to the gear frame, the end of the air suction cylinder is provided with a hole adapted to the second connecting rod for the second connecting rod to pass through, one end of the two second connecting pipes are connected to the air suction cylinder, the two one-way valves are respectively installed on the two second connecting pipes, the rotary joint is installed at one end of the first rotating shaft away from the rotating roller, the rotary joint is connected to the second chamber inside the first rotating shaft, the rotary joint, the rotating roller and the first rotating shaft are coaxially arranged, the collection box is arranged on the frame, one end of one of the second connecting pipes away from the air suction cylinder is connected to the rotary joint, and the other end of the second connecting pipe away from the air suction cylinder is connected to the collection box.

[0023] The present invention has the following beneficial effects:

[0024] 1. When the rotating roller moves with the gear rack and is inserted into the grinding cylinder, its self-rotation can drive the bristles on the brush to brush the inner wall of the grinding cylinder together, effectively removing the attached debris. At the same time, when the gas from the gas storage tank enters the exhaust pipe, the rotating roller continues to brush to ensure that the debris is brushed off in time. Subsequently, the suction action of the suction pipe extracts the debris, thereby realizing the automatic cleaning of the inner wall of the grinding cylinder. This design not only avoids the test error caused by the residue of debris, but also ensures the test accuracy of the wear test device for the piston ring. The cleaning process is automatic and no manual intervention is required;

[0025] 2. After the test, the staff can easily remove the cap by simply turning it, which is convenient for subsequent operations. The combination of the linear slide rail and the linear slide seat can easily move the grinding cylinder, so that the piston and the grinding cylinder can be separated smoothly, which improves the processing efficiency after the test. In addition, the design of the loss cleaning unit is ingenious. By opening the control valve, the high-pressure gas in the gas tank is used as the power source, and there is no need to set up additional power equipment, which saves costs and simplifies operations;

[0026] 3. Through the ingenious design of the brush part, the connection part and the traction part, the automatic retraction function of the bristles of the rotating roller during the resetting process is realized. When the rotating roller drives the brush part to move forward, the sliding ring and the fixed ring, sliding sleeve and other components thereon work together. Through the interaction of friction and magnetic attraction, the sliding ring moves and is adsorbed on the magnetic attraction of the magnetic attraction ring. In this process, the sliding ring drives the synchronous rotation of several rotating plates through the linkage of the first pull rope and the second pull rope, thereby realizing the retraction of the bristles. The retracted state of the bristles avoids contact with the inner wall of the grinding cylinder when the rotating roller is reset, effectively preventing the debris attached to the bristles from being transferred to the inner wall of the grinding cylinder again, thereby avoiding the phenomenon of secondary pollution.

[0027] 4. The lubricating oil stored inside the oil box can ensure that the lower end of the guide piece is immersed in it, so that when the guide piece rotates, the oil attached to its surface will flow and cover it evenly, effectively reducing the friction between the ball and the guide piece. This design enables the fixed rod to drive the guide piece to rotate more smoothly, improving the flexibility and efficiency of the entire transmission system. Secondly, the lower end of the second gear is also immersed in the lubricating oil. When the second gear rotates, the lubricating oil can fully infiltrate its teeth and be evenly distributed on the contact surface between the second gear and the first gear, which not only reduces the friction between the two, but also ensures the smooth transmission action and extends the service life of the gear. This design cleverly uses lubricating oil to not only improve the flexibility and efficiency of the transmission system, but also ensures the stability and reliability of gear transmission, while extending the service life of key components, providing a strong guarantee for the stable operation of the entire wear test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a structural schematic diagram of a cylinder liner and piston ring wear test device proposed by the present invention;

[0029] Figure 2 A structural schematic diagram of a cylinder liner and piston ring wear test device proposed by the present invention from another perspective;

[0030] Figure 3 It is a schematic diagram of the structure of the wear detection unit, the pneumatic drive unit and the wear cleaning unit;

[0031] Figure 4 for Figure 3 A magnified view of the structure at A;

[0032] Figure 5 It is a schematic diagram of the cross-sectional structure of the grinding cylinder;

[0033] Figure 6 for Figure 5 A magnified view of the structure at B;

[0034] Figure 7 for Figure 5 A magnified view of the structure at C;

[0035] Figure 8 for Figure 5 A magnified view of the structure at D;

[0036] Fig. 9 It is a schematic diagram of the cross-sectional structure of the gas storage tank;

[0037] Fig.10 for Figure 3 A magnified view of the local structure;

[0038] Fig.11 for Fig.10 A magnified view of the structure at E;

[0039] Fig.12 It is a schematic diagram of the cross-sectional structure of the suction cylinder.

[0040] In the figure: 1, frame; 101, oil box; 2, drive module; 3, piston clamp; 41, grinding cylinder; 42, connecting ring; 43, screw cap; 44, first connecting pipe; 45, first one-way valve; 46, linear slide rail; 47, linear slide seat; 51, air storage tank; 52, first slide plug; 53, first spring; 61, exhaust pipe; 62, second slide plug; 63, first connecting rod; 64, air guide pipe; 65, control valve; 71, gear rack; 72, first rotating shaft; 73, first gear; 74, rotating roller; 75, suction hole; 76, side plate; 77, rotating plate ; 78. Pin shaft; 79. Brush; 710. Sliding ring; 711. First pull rope; 712. Second pull rope; 713. Magnetic ring; 714. Connecting rod; 715. Fixed ring; 716. Sliding sleeve; 717. Outer cylinder; 718. Inner rod; 719. Limiting opening; 720. Limiting block; 81. Second rotating shaft; 82. Second gear; 83. Guide plate; 84. Fixed rod; 85. Ball; 91. Air suction cylinder; 92. Third sliding plug; 93. Second connecting rod; 94. Second connecting pipe; 95. Second one-way valve; 96. Rotating joint; 97. Collecting box. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] Reference Figure 1-12 A cylinder liner piston ring wear test device includes a frame 1, a wear detection unit, a pneumatic drive unit, a wear cleaning unit and a wear collection unit. An oil box 101 is fixed on the frame 1, a drive module 2 is installed on the frame 1, and a drive end of the drive module 2 is connected to a piston fixture 3. When the drive module 2 is running, the piston fixture 3 is driven to reciprocate.

[0043] The wear detection unit includes a grinding cylinder 41, a linear slide 46 and a linear slide 47. The linear slide 46 is arranged on the frame 1, and the linear slide 47 is slidably assembled on the linear slide 46. The grinding cylinder 41 is fixed on the top surface of the linear slide 47, and the grinding cylinder 41 is arranged opposite to the piston fixture 3. Both ends of the grinding cylinder 41 are open. When the piston fixture 3 reciprocates, the piston is driven to reciprocate inside the grinding cylinder 41 to perform a wear test on the piston ring. The staff assembles the piston to be tested on the piston fixture 3, and then adjusts the linear slide 46 to make the linear slide The seat 47 moves toward the direction close to the piston fixture 3, and at the same time straightens the piston so that the piston is inserted into the inside of the grinding cylinder 41. When testing the piston ring, the staff starts the driving module 2. When the driving module 2 is running, it drives the piston fixture 3 to move back and forth, so that the piston moves back and forth inside the grinding cylinder 41. In this process, the piston ring will have friction loss with the inner wall of the grinding cylinder 41, and the wear test of the piston ring can be performed. The wear detection unit also includes a connecting ring 42, a screw cap 43, two first connecting pipes 44 and two first one-way valves 45. The connecting ring 42 (such as Figure 5 The first connecting tube 44 is connected to the grinding cylinder 41 at one end away from the piston fixture 3, and the connecting ring 42 is provided with an external thread, and the inner ring of the screw cap 43 is provided with a thread groove, and the screw cap 43 is threadedly sleeved on the connecting ring 42, and one end of the two first connecting pipes 44 is connected to the inside of the screw cap 43, and the two first one-way valves 45 are respectively installed on the two first connecting pipes 44, and the flow limiting directions of the two first one-way valves 45 are opposite, and one of the first connecting pipes 44 is connected to the external environment for extracting ambient air;

[0044] The pneumatic drive unit includes an air storage component, a pushing component, a cleaning component and a rotating component. The air storage component includes an air storage tank 51, a first sliding plug 52 and a first spring 53. The air storage tank 51 is fixed on the frame 1, and the first sliding plug 52 is sealingly slidably connected to the inside of the air storage tank 51 (such as Fig. 9 As shown in FIG. 1 , one end of the first spring 53 is connected to the inner surface of the gas storage tank 51, and the other end is connected to the first sliding plug 52. The gas storage tank 51 is connected to the end of another first connecting pipe 44 away from the screw cap 43. The pushing assembly includes an exhaust cylinder 61, a second sliding plug 62, a first connecting rod 63 and an air guide pipe 64. The exhaust cylinder 61 is fixed to the frame 1 through a bracket, and the second sliding plug 62 is sealingly slidably connected to the inside of the exhaust cylinder 61 (as shown in FIG. 1 ). Figure 8As shown in the figure, one end of the first connecting rod 63 is fixedly connected to the second sliding plug 62, and a hole adapted to the first connecting rod 63 is opened at the end of the exhaust pipe 61. The other end of the first connecting rod 63 extends through the hole to the outside of the exhaust pipe 61. One end of the air guide pipe 64 is connected to the air storage tank 51, and the other end is connected to the exhaust pipe 61. A control valve 65 is installed on the air guide pipe 64. The rotating part includes a gear frame 71, a first rotating shaft 72, a first gear 73 and a rotating roller 74. The gear frame 71 is fixed to one end of the first connecting rod 63 located outside the exhaust pipe 61 (as shown in the figure). Figure 4 As shown in FIG. 1 ), the first rotating shaft 72 is rotatably mounted on the gear frame 71, the first gear 73 is fixedly sleeved on the first rotating shaft 72, and the rotating roller 74 is fixedly connected to the first rotating shaft 72 (as shown in FIG. 1 ). Figure 6 As shown, a first chamber is provided inside the rotating roller 74, a second chamber is provided inside the first rotating shaft 72, the first chamber and the second chamber are connected, and a plurality of suction holes 75 (as shown) connected to the first chamber are provided on the outer circumference of the rotating roller 74. Fig. 9 As shown in the figure, when the piston moves toward the direction close to the screw cap 43, the piston can press the above-mentioned closed space into the interior of the gas storage tank 51 through the corresponding first connecting pipe 44. When the piston moves toward the direction away from the screw cap 43, the piston can extract gas from the external environment through the corresponding first connecting pipe 44 and replenish the gas into the above-mentioned closed space. Based on the above process, during the wear detection of the piston, the piston can continuously supply gas into the interior of the gas storage tank 51.

[0045] The rotating assembly includes a second rotating shaft 81, a second gear 82, a guide piece 83, a fixing rod 84 and a ball 85. The second rotating shaft 81 is rotatably mounted on the gear frame 71. The second gear 82 is fixedly sleeved on the second rotating shaft 81. The second gear 82 and the first gear 73 are meshed with each other. The guide piece 83 is fixed on the second rotating shaft 81. The guide piece 83 is a spiral structure. The fixing rod 84 is fixed in the oil box 101. The ball 85 is assembled at one end of the fixing rod 84 away from the oil box 101. The ball 85 is arranged opposite to the guide piece 83. The guide piece 83 is a spiral structure.

[0046] The cleaning assembly is composed of a rotating part, a brush part, a connecting part and a traction part. The brush part is composed of a plurality of brush members, which are evenly arranged on the outer peripheral surface of the rotating roller 74. The plurality of brush members are divided into multiple rows, and each row of brush members is arranged along the axial direction of the rotating roller 74, and the multiple rows of brush members are distributed in a circumferential array; each brush member includes two side plates 76, a rotating plate 77, a pin 78 and bristles 79. The two side plates 76 are fixed on the outer peripheral surface of the rotating roller 74, and the rotating plate 77 is rotatably assembled between the two side plates 76 through the pin 78. The bristles 79 are arranged in a circumferential array. 9 is fixed at the end of the rotating plate 77, the connecting part includes a sliding ring 710, a plurality of first pull ropes 711, a plurality of second pull ropes 712 and a magnetic ring 713, the magnetic ring 713 is fixedly sleeved at the end of the rotating roller 74, the sliding ring 710 is slidably sleeved on the rotating roller 74, and the sliding ring 710 is made of magnetic material, a plurality of rotating plates 77 close to the sliding ring 710 are connected to the sliding ring 710 through the first pull rope 711, and two adjacent rotating plates 77 in the same row are connected through the second pull rope 712;

[0047] The traction part includes a fixed ring 715, a sliding sleeve 716, an outer cylinder 717 and an inner rod 718. The fixed ring 715 is sleeved on the sliding ring 710 (such as Fig.11 As shown), the fixed ring 715 is connected to the sliding ring 710 through a plurality of connecting rods 714, the sliding sleeve 716 is slidably sleeved on the fixed ring 715, and the sliding sleeve 716 is provided with an escape opening for avoiding the plurality of connecting rods 714. The outer cylinder 717 is fixed on the exhaust pipe 61, and the inner rod 718 is slidably arranged in the outer cylinder 717. One end of the inner rod 718 extends to the outside of the outer cylinder 717 and is fixedly connected to the sliding sleeve 716. The outer cylinder 717 is provided with a limit opening 719 arranged along the length direction of the outer cylinder 717, and a limit block 720 (as shown in FIG. Figure 8 As shown in the figure, the limit block 720 is slidably disposed in the limit opening 719, and the setting of the sliding sleeve 716 enables relative rotation between the fixing ring 715 and the inner rod 718 to avoid motion interference between the fixing ring 715 and the inner rod 718;

[0048] The loss collection unit is arranged on the top surface of the frame 1, and is used to collect the loss generated by the piston ring wear test. The loss collection unit includes an air suction cylinder 91, a third sliding plug 92, a second connecting rod 93, two second connecting pipes 94, two second one-way valves 95, a rotary joint 96 and a collection box 97. The air suction cylinder 91 is fixed on the outer peripheral surface of the exhaust cylinder 61 (such as Fig.12As shown, the third sliding plug 92 is sealingly and slidably connected to the inside of the suction cylinder 91, one end of the second connecting rod 93 is fixedly connected to the third sliding plug 92, the other end of the second connecting rod 93 extends to the outside of the suction cylinder 91 and is fixedly connected to the gear frame 71, and the end of the suction cylinder 91 is provided with a hole adapted to the second connecting rod 93 for the second connecting rod 93 to pass through, and two second connecting pipes 94 (combined Figure 1 and Fig.12 ) are connected to the suction cylinder 91, two one-way valves are respectively installed on the two second connecting pipes 94, the rotary joint 96 is installed at the end of the first rotating shaft 72 away from the rotating roller 74, the rotary joint 96 is connected to the second chamber inside the first rotating shaft 72, the rotary joint 96 and the rotating roller 74 are coaxially arranged with the first rotating shaft 72, the collecting box 97 is arranged on the frame 1, one end of one of the second connecting pipes 94 away from the suction cylinder 91 is connected to the rotary joint 96, and the other end of the second connecting pipe 94 away from the suction cylinder 91 is connected to the collecting box 97. In the process of the gas in the gas storage tank 51 entering the exhaust pipe 61, the rotating roller 74 can brush the grinding cylinder 41, and the debris brushed off by the bristles 79 will be extracted under the suction action of the suction cylinder 91. This special design can automatically clean the inner wall of the grinding cylinder 41 to prevent debris from remaining on the inner wall of the grinding cylinder 41.

[0049] The specific working principle of the present invention is as follows:

[0050] When the cylinder sleeve piston ring wear test device proposed in the present invention is used, the staff assembles the piston to be tested on the piston fixture 3, and then adjusts the linear slide 46 to move the linear slide 47 toward the direction close to the piston fixture 3, and at the same time straightens the piston so that the piston is inserted into the inside of the grinding cylinder 41. When testing the piston ring, the staff starts the drive module 2. When the drive module 2 is running, it drives the piston fixture 3 to move back and forth, so that the piston moves back and forth inside the grinding cylinder 41. In this process, the piston ring will have friction loss with the inner wall of the grinding cylinder 41, and the piston ring can be tested for wear. It is worth noting that the way the drive module 2 drives the piston fixture 3 is a prior art and is not an improved part of the present technical solution. It is not shown in the figure and will not be described in detail here.

[0051] During the wear test of the piston ring, the staff tightens the screw cap 43 on the connecting ring 42 so that the screw cap 43 blocks one end of the grinding cylinder 41. In this case, a closed space is formed between the grinding cylinder 41, the screw cap 43 and the piston. Two first connecting pipes 44 are connected to the screw cap 43. The two first connecting pipes 44 are both equipped with first one-way valves 45, and the flow limiting directions of the two first one-way valves 45 are opposite. Specifically, one of the first one-way valves 45 limits the gas to only enter the above-mentioned closed space, and the other first one-way valve 45 limits the gas to only flow out of the above-mentioned closed space. Therefore, when the piston moves toward the direction close to the screw cap 43, the piston can press the above-mentioned closed space into the interior of the gas storage tank 51 through the corresponding first connecting pipe 44. When the piston moves toward the direction away from the screw cap 43, the piston can extract gas from the external environment through the corresponding first connecting pipe 44 and replenish the gas into the above-mentioned closed space. Based on the above process, during the wear detection of the piston, the piston can continuously supply gas into the interior of the gas storage tank 51.

[0052] During the wear test, the control valve 65 on the air guide pipe 64 is in a closed state. At this time, the gas in the gas storage tank 51 cannot flow out through the air guide pipe 64. Therefore, when the gas continuously enters the gas storage tank 51, the gas will accumulate in the gas storage tank 51 and push the first sliding plug 52 to move. When the first sliding plug 52 moves, it will squeeze the first spring 53. With the entry of gas, the internal air pressure of the gas storage tank 51 will gradually increase.

[0053] After the wear test is completed, the staff first removes the screw cap 43 from the grinding cylinder 41 by rotating the screw cap 43, and puts the screw cap 43 aside, and then controls the linear slide 46 to move the linear slide 47. When the linear slide 47 moves, it can drive the grinding cylinder 41 to move, so that the grinding cylinder 41 moves in a direction away from the piston fixture 3. In this process, the piston can be detached from the inside of the grinding cylinder 41 to achieve separation between the piston and the grinding cylinder 41. Further, the staff uses the wear cleaning unit to clean the debris remaining in the grinding cylinder 41. For the wear cleaning unit, the staff first opens the control valve 65. When When the control valve 65 is opened, the high-pressure gas in the gas storage tank 51 can flow out through the air guide pipe 64 and enter the exhaust cylinder 61. At the same time, under the elastic force of the first spring 53, the first sliding plug 52 will gradually return to its original position and apply pressure to the gas in the gas storage tank 51 to drive the gas into the exhaust cylinder 61 through the air guide pipe 64. When the gas enters the exhaust cylinder 61, the gas will push the second sliding plug 62 in the exhaust cylinder 61, so that the second sliding plug 62 drives the first connecting rod 63 to move. When the first connecting rod 63 moves, it can drive the gear frame 71 to move, so that the gear frame 71 moves toward the direction close to the grinding cylinder 41.

[0054] When the gear rack 71 moves, the first rotating shaft 72 and the second rotating shaft 81 thereon will move accordingly. When the second rotating shaft 81 moves, the guide piece 83 thereon will move accordingly. When the guide piece 83 moves, the ball 85 at the end of the fixing rod 84 will squeeze the guide piece 83. Figure 7 and Fig.12 As shown, the guide piece 83 is in a spiral structure. When the fixed rod 84 squeezes the guide piece 83 in a moving state, the guide piece 83 will rotate under the obstruction of the fixed rod 84 and drive the second rotating shaft 81 to rotate. The design of the ball 85 is used to reduce the friction between the guide piece 83 and the fixed rod 84. When the guide piece 83 and the fixed rod 84 are squeezed, the ball 85 can rotate to reduce the friction generated by the mutual squeezing of the two, which is conducive to the smooth rotation of the guide piece 83. Therefore, under the cooperation of the fixed rod 84 and the guide piece 83, the second rotating shaft 81 can rotate while following the movement of the gear frame 71.

[0055] When the second rotating shaft 81 rotates, it can drive the first rotating shaft 72 to rotate through the second gear 82 and the first gear 73 that are meshed with each other. When the first rotating shaft 72 rotates, the rotating roller 74 rotates accordingly. Therefore, the movement action of the rotating roller 74 and the self-rotation action are performed synchronously. A plurality of brush members are arranged on the rotating roller 74. The rotating roller 74 can drive the plurality of brush members to rotate during the rotation process, so that the plurality of brush members can jointly clean the inner wall of the grinding cylinder 41. Specifically, when the rotating roller 74 moves with the gear frame 71, the rotating roller 74 can be inserted into the grinding cylinder 41. When the rotating roller 74 rotates, the bristles 79 on the plurality of brush members can jointly brush the inner wall of the grinding cylinder 41 and brush off the debris attached to the inner wall of the grinding cylinder 41. In addition, the gear frame 71 can also pull the second connecting rod 93 during the movement, so that the second connecting rod 93 drives the third sliding plug 92 to move.

[0056] Two second connecting pipes 94 are connected to the suction cylinder 91, and second one-way valves 95 are installed on the two second connecting pipes 94, and the flow limiting directions of the two second one-way valves 95 are opposite. Specifically, one of the second one-way valves 95 restricts the gas from entering the suction cylinder 91, and the other second one-way valve 95 restricts the gas from flowing out of the suction cylinder 91. Therefore, when the third sliding plug 92 moves under the traction of the gear rack 71, the third sliding plug 92 can extract the gas in the second chamber through the corresponding second connecting pipe 94. The second chamber is connected to the first chamber, so the gas inside the first chamber will also be extracted. Under the suction action of the third sliding plug 92, the plurality of suction holes 75 arranged on the rotating roller 74 can absorb the debris brushed by the plurality of bristles 79, thereby collecting the debris. It should be noted that since the gap between the outer surface of the piston and the inner wall of the grinding cylinder 41 is small enough, that is, the degree of fit between the piston and the grinding cylinder 41 is very high , so the debris generated when the two are worn is also very small. This debris can be sucked into the first chamber along with the air flow under the action of negative pressure, and finally enter the interior of the suction cylinder 91. Based on the above process, in the process of the gas in the gas storage tank 51 entering the exhaust cylinder 61, the rotating roller 74 can brush the grinding cylinder 41, and the debris brushed off by the bristles 79 will be extracted under the suction action of the suction cylinder 91. This special design can automatically clean the inner wall of the grinding cylinder 41 to prevent debris from remaining on the inner wall of the grinding cylinder 41, thereby ensuring the test accuracy of the wear test device for the piston ring. Furthermore, after the test is completed, the staff manually resets the rotating roller 74, which causes the third sliding plug 92 to reset accordingly. During the resetting process, the third sliding plug 92 can push the gas in the suction cylinder 91 into the collection box 97 through the corresponding second connecting pipe 94, and the debris mixed in the gas will also be pushed into the collection box 97, so as to realize the unified collection of debris;

[0057] When the bristles 79 are brushing the inner wall of the grinding cylinder 41, debris may adhere to the bristles 79. In order to prevent the debris from being transferred from the bristles 79 to the inner wall of the grinding cylinder 41 during the resetting process, the present invention is designed with a brush portion, a connecting portion and a traction portion. Under the cooperation of the brush portion, the connecting portion and the traction portion, when the rotating roller 74 is resetting, the plurality of rotating plates 77 can rotate synchronously and maintain an inclined state, so that the plurality of bristles 79 can be retracted. In this case, when the rotating roller 74 is resetting, the bristles 79 no longer contact the inner wall of the grinding cylinder 41, which can prevent the debris on the bristles 79 from causing secondary pollution to the grinding cylinder 41. Specifically, when the rotating roller 74 drives the plurality of brush members to move forward, the fixed ring 715 on the sliding ring 710 moves accordingly, and the sliding sleeve 71 arranged on the fixed ring 715 6 can pull the inner rod 718 to move, so that the inner rod 718 gradually extends out from the outer cylinder 717. In this process, the friction between the outer cylinder 717 and the inner rod 718 cannot overcome the friction between the sliding ring 710 and the rotating roller 74, so that the sliding sleeve 716 can smoothly pull the inner rod 718. During the movement of the inner rod 718, the limit block 720 thereon will slide along the limit opening 719. When the limit block 720 moves to the end position of the limit opening 719, the limit block 720 cannot continue to move, and the inner rod 718 cannot move either. When the inner rod 718 is restricted by the limit block 720, the sliding sleeve 716 connected to the inner rod 718 will stop moving, and the fixed ring 715 and the sliding ring 710 will also stop moving. At the same time, the rotating roller 74 continues to move, so that the rotating roller 74 and the sliding ring 710 can move relative to each other.

[0058] When the rotating roller 74 continues to move, the magnetic ring 713 thereon also moves accordingly, so that the magnetic ring 713 gradually approaches the sliding ring 710. When the sliding ring 710 is within the magnetic attraction range of the magnetic ring 713, the sliding ring 710 moves under the magnetic attraction of the magnetic ring 713 and is adsorbed on the magnetic ring 713. In this case, the sliding ring 710 pulls the rotating plates 77 near the sliding ring 710 through the first pull ropes 711, so that the rotating plates 77 rotate. For the rotating plates 77 in the same row, the adjacent rotating plates 77 are The two rotating plates 77 are connected by the second pull rope 712. Therefore, when the rotating plate 77 close to the sliding ring 710 rotates, the remaining rotating plates 77 in the same row can rotate under the action of the second pull ropes 712, so that the bristles 79 can be retracted. In this case, the retracted bristles 79 will not contact the inner wall of the grinding cylinder 41 when resetting, so that the debris attached to the bristles 79 will not be reattached to the inner wall of the grinding cylinder 41, and the secondary pollution will be avoided. Finally, the staff can clean the bristles 79 regularly.

[0059] In order to ensure that the fixed rod 84 can smoothly drive the guide piece 83 to rotate, a certain amount of lubricating oil can be stored inside the oil box 101. The lower end portion of the guide piece 83 is immersed in the lubricating oil. When the guide piece 83 rotates, the oil attached to the surface of the guide piece 83 will flow along with it, which allows the oil to evenly adhere to the surface of the guide piece 83. The presence of the oil can further reduce the friction between the ball 85 and the guide piece 83, so that the fixed rod 84 can smoothly drive the guide piece 83 to rotate. In addition, the lower end portion of the second gear 82 is also immersed in the lubricating oil. When the second gear 82 rotates, the lubricating oil can infiltrate the teeth of the second gear 82, so that the lubricating oil is evenly distributed between the second gear 82 and the first gear 73. The lubricating oil can also reduce the friction between the second gear 82 and the first gear 73, so that the transmission action proceeds smoothly.

[0060] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylinder liner and piston ring wear test device, characterized in that: It includes a frame, a wear detection unit, a pneumatic drive unit, a wear cleaning unit and a wear collection unit; Among them, an oil box is fixed on the frame, a driving module is installed on the frame, a driving end of the driving module is connected to the piston fixture, and when the driving module is running, the piston fixture is driven to move back and forth; The wear detection unit includes a grinding cylinder, a linear slide and a linear slide. The linear slide is arranged on a frame, and the linear slide is slidably assembled on the linear slide. The grinding cylinder is fixed on the top surface of the linear slide, and the grinding cylinder is arranged opposite to the piston fixture. Both ends of the grinding cylinder are open. When the piston fixture reciprocates, the piston is driven to reciprocate inside the grinding cylinder to perform a wear test on the piston ring. The pneumatic drive unit includes an air storage component, a pushing component, a cleaning component and a rotating component. The cleaning component is composed of a rotating part, a brush part, a connecting part and a traction part. Wherein, the loss collection unit is arranged on the top surface of the frame and is used to collect the loss generated by the piston ring wear test; The wear detection unit also includes a connecting ring, a screw cap, two first connecting pipes and two first one-way valves. The connecting ring is fixed to the end of the grinding cylinder away from the piston fixture, and an external thread is provided on the connecting ring. The inner ring of the screw cap is provided with a thread groove. The screw cap is threadedly sleeved on the connecting ring. One end of the two first connecting pipes is connected to the inside of the screw cap. The two first one-way valves are respectively installed on the two first connecting pipes. The flow limiting directions of the two first one-way valves are opposite. One of the first connecting pipes is connected to the external environment for extracting ambient air. The gas storage assembly includes a gas storage tank, a first sliding plug and a first spring. The gas storage tank is fixed on the frame. The first sliding plug is sealingly and slidingly connected inside the gas storage tank. One end of the first spring is connected to the inner surface of the gas storage tank, and the other end is connected to the first sliding plug. The gas storage tank is connected to the end of another first connecting pipe away from the screw cap.

2. A cylinder liner and piston ring wear test device according to claim 1, characterized in that: The pushing assembly includes an exhaust pipe, a second sliding plug, a first connecting rod and an air duct. The exhaust pipe is fixed to the frame through a bracket. The second sliding plug is sealingly and slidingly connected to the inside of the exhaust pipe. One end of the first connecting rod is fixedly connected to the second sliding plug. A hole matching the first connecting rod is opened at the end position of the exhaust pipe. The other end of the first connecting rod extends to the outside of the exhaust pipe through the hole. One end of the air duct is connected to the air storage tank, and the other end is connected to the exhaust pipe. A control valve is installed on the air duct.

3. The cylinder liner and piston ring wear test device according to claim 1, characterized in that: The rotating part includes a gear frame, a first rotating shaft, a first gear and a rotating roller. The gear frame is fixed to one end of the first connecting rod located outside the exhaust pipe. The first rotating shaft is rotatably assembled on the gear frame. The first gear is fixedly sleeved on the first rotating shaft. The rotating roller is fixedly connected to the first rotating shaft. A first chamber is opened inside the rotating roller, a second chamber is opened inside the first rotating shaft, the first chamber is connected to the second chamber, and a plurality of suction holes connected to the first chamber are opened on the outer circumference of the rotating roller.

4. The cylinder liner and piston ring wear test device according to claim 1, characterized in that: The brush part is composed of a plurality of brush members, which are evenly arranged on the outer peripheral surface of the rotating roller, and the plurality of brush members are divided into a plurality of rows, each row of brush members is arranged along the axis direction of the rotating roller, and the plurality of rows of brush members are distributed in a circumferential array; Each brush member includes two side plates, a rotating plate, a pin shaft and bristles. The two side plates are fixed on the outer circumference of the rotating roller. The rotating plate is rotatably assembled between the two side plates through the pin shaft, and the bristles are fixed at the end position of the rotating plate.

5. The cylinder liner and piston ring wear test device according to claim 4, characterized in that: The connecting part includes a sliding ring, a plurality of first pull ropes, a plurality of second pull ropes and a magnetic ring. The magnetic ring is fixedly sleeved at the end of the rotating roller. The sliding ring is slidably sleeved on the rotating roller. The sliding ring is made of magnetic material. A plurality of rotating plates close to the sliding ring are connected to the sliding ring through the first pull ropes. Two adjacent rotating plates in the same row are connected through the second pull ropes.

6. The cylinder liner and piston ring wear test device according to claim 1, characterized in that: The traction part includes a fixed ring, a sliding sleeve, an outer tube and an inner rod. The fixed ring is sleeved on the sliding ring, and the fixed ring is connected to the sliding ring through a plurality of connecting rods. The sliding sleeve is slidably sleeved on the fixed ring, and a avoidance opening for avoiding a plurality of connecting rods is provided on the sliding sleeve. The outer tube is fixed on the exhaust pipe, and the inner rod is slidably arranged in the outer tube. One end of the inner rod extends to the outside of the outer tube and is fixedly connected to the sliding sleeve. A limit opening arranged along the length direction of the outer tube is provided on the outer tube, and a limit block is fixed on the inner rod, and the limit block is slidably arranged in the limit opening.

7. The cylinder liner and piston ring wear test device according to claim 3, characterized in that: The rotating assembly includes a second rotating shaft, a second gear, a guide plate, a fixed rod and a ball. The second rotating shaft is rotatably installed on the gear frame. The second gear is fixedly sleeved on the second rotating shaft. The second gear and the first gear are meshed with each other. The guide plate is fixed on the second rotating shaft. The guide plate is a spiral structure. The fixed rod is fixed in the oil box. The ball is assembled at the end of the fixed rod away from the oil box, and the ball is arranged opposite to the guide plate.

8. The cylinder liner and piston ring wear test device according to claim 3, characterized in that: The loss collection unit includes an air intake cylinder, a third sliding plug, a second connecting rod, two second connecting pipes, two second one-way valves, a rotating joint and a collection box. The air intake cylinder is fixed on the outer circumferential surface of the exhaust cylinder, the third sliding plug is sealingly and slidingly connected inside the air intake cylinder, one end of the second connecting rod is fixedly connected to the third sliding plug, the other end of the second connecting rod extends to the outside of the air intake cylinder and is fixedly connected to the gear frame, the end of the air intake cylinder is provided with a hole matched with the second connecting rod for the second connecting rod to pass through, one end of the two second connecting pipes are connected to the air intake cylinder, the two one-way valves are respectively installed on the two second connecting pipes, the rotating joint is installed at one end of the first rotating shaft away from the rotating roller, the rotating joint is connected to the second chamber inside the first rotating shaft, the rotating joint, the rotating roller and the first rotating shaft are coaxially arranged, the collection box is arranged on the frame, one end of one second connecting pipe away from the air intake cylinder is connected to the rotating joint, and the other end of the second connecting pipe away from the air intake cylinder is connected to the collection box.

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