Method and equipment for cleaning key friction pair

Abstract

The invention discloses a key friction pair cleaning method and equipment thereof.The key friction pair cleaning method comprises the following steps that S1, a plunger body, a sliding shoe and a rotor are placed in a hydrocarbon solution to be soaked, impurities in the plunger body, the sliding shoe and the rotor are loosened and fall off, and then the sliding shoe and the plunger body are fixed in a mounting frame of a cleaning device; s2, selecting a proper spray head, and mounting the spray head on a spray head seat of the cleaning device; and S3, the pressure of the spray head and the washing time are adjusted, the plunger body, the sliding shoe and the front and back sides of the rotor are washed, and cleaning of the friction pair is completed. The cleaning effect of a key friction pair can be effectively improved.

Description

Technical Field

[0001] The invention relates to a cleaning method and equipment thereof, in particular to a cleaning method and equipment thereof for a key friction pair. Background Art

[0002] As the cleanliness requirements for supporting products in the aerospace field increase, improving the cleanliness of manufactured parts has also become an inevitable trend in the development of the industry. Due to its special structure, the plunger consists of a sliding shoe plunger body to form a movable joint, and there is a through hole at each end of the part. Metal cutting and grinding in the subsequent manufacturing process will seriously affect the cleanliness of the plunger. If the grinding protection is not in place, abrasives may enter the joint, causing the plunger gap to become larger after the assembly is completed and tested, affecting product performance and making it impossible to continue to use. The rotor, as a matching part of the plunger, will also have greater abnormal wear due to the presence of hard large particles and the outer wall of the plunger body, affecting the inner hole size of the rotor and the appearance of the plunger body, resulting in an increase in the workload of parts rework and material loss. At present, there is no effective solution for the cleanliness control of the rotor plunger friction pair. Summary of the invention

[0003] The purpose of the present invention is to provide a method and device for cleaning a key friction pair, which can effectively improve the cleaning effect of the key friction pair.

[0004] The technical solution of the present invention is a method for cleaning a key friction pair, comprising the following steps:

[0005] S1. Soak the plunger body, the sliding shoe and the rotor in a hydrocarbon solution to loosen and remove impurities in the plunger body, the sliding shoe and the rotor, and then fix the sliding shoe and the plunger body in the mounting frame of the cleaning device;

[0006] S2. Select a suitable nozzle and install it on the nozzle seat of the cleaning device;

[0007] S3. Adjust the nozzle pressure and flushing time, and flush the plunger body, sliding shoe and the front and back sides of the rotor to complete the cleaning of the friction pair.

[0008] In the aforementioned method for cleaning a key friction pair, the immersion time of the plunger body, the sliding shoe and the rotor in S1 is not less than 30 minutes.

[0009] In the aforementioned cleaning method for a key friction pair, the S3 nozzle pressure is adjusted to 0.9 to 1.5 MPa for removing processing attachments and 0.3 to 0.9 MPa for removing cleaning residues.

[0010] A cleaning device used in a cleaning method for a key friction pair includes a casing, wherein a fixing bracket for fixing a plunger body, a sliding shoe or a rotor is provided in the casing, a flushing mechanism for flushing the plunger body, the sliding shoe or the rotor is provided on the upper side of the fixing bracket, and a liquid collecting pool is provided on the lower side of the fixing bracket.

[0011] In the cleaning device used in the aforementioned cleaning method of a key friction pair, the fixed bracket includes a base plate with a water leakage hole, and vertically arranged fixed support plates are provided on the upper sides of both ends of the base plate, and two groups of horizontally arranged first and second screw rods are provided between the two fixed support plates. The first and second screw rods are provided with multiple groups of clamping seats for fixing the plunger body, the sliding shoe and the rotor, and the distance between adjacent clamping seats is not less than 2 cm.

[0012] In the cleaning device used in the aforementioned cleaning method of a key friction pair, the clamping seat includes a left clamping seat and a right clamping seat arranged relatively to each other, the left clamping seat includes a screw seat corresponding to the first screw, a guide block is provided on the lower side of the screw seat, a through hole corresponding to the second screw is provided in the guide block, a wear-resistant sleeve is provided in the through hole, a left clamping block is provided on the upper side of the screw seat, and the right clamping seat includes a screw seat corresponding to the second screw, a guide block is provided on the upper side of the screw seat, and a right clamping block is provided on the guide block.

[0013] In the cleaning device used in the aforementioned cleaning method of a key friction pair, the shower mechanism includes a back plate arranged on the rear side of a fixed bracket, a top plate is arranged on the front side of the upper end of the back plate, a hydraulic push rod is arranged on the lower side of the top plate, a mounting plate is arranged on the lower side of the hydraulic push rod, a guide groove is arranged in the mounting plate, a plurality of groups of movable seats that can slide along the guide groove are arranged in the guide groove, a mounting seat that can rotate relative to the movable seat is arranged in the middle of the movable seat, and an adjustment bracket for adjusting the angle of the nozzle is arranged under the mounting seat.

[0014] In the cleaning device used in the aforementioned cleaning method for a key friction pair, a driven wheel is provided on the outer side of the upper end of the mounting seat, and a rack for driving the driven wheel is provided on the upper side of the mounting plate.

[0015] In the cleaning device used in the aforementioned cleaning method of a key friction pair, the adjustment bracket includes a vertical rod, a rotating rod that can rotate relative to the vertical rod is provided at the lower end of the vertical rod through a rotating shaft, a fixing clamp for fixing the nozzle seat is provided at the end of the rotating rod away from the rotating shaft, the rotating rod is integrally arranged with the rotating shaft, and an adjusting gear is provided outside the rotating shaft, and an active gear for driving the adjusting gear is provided on one side of the vertical rod.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The present application soaks the plunger body, the sliding shoe and the rotor in a hydrocarbon solution so that impurities in the plunger body, the sliding shoe and the rotor are loosened and fall off, selects a suitable nozzle, and adjusts the nozzle pressure and flushing time, and flushes through a cleaning device, thereby effectively improving the cleanliness of the key friction pair and reducing wear. Different nozzle types, injection pressures and flushing times are controlled to solve the problems of residual abrasives and metal particles in the movable joints of parts and the walls of small holes, meet the cleanliness level requirements for direct contact between parts and working media, and improve the reliability of key friction pairs; and the cleaning equipment of the present application can adjust the angle position of the nozzle to adapt to different key friction pairs, and has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the cleaning device of the present invention;

[0019] Figure 2 is a partial enlarged view of the cleaning device of the present invention;

[0020] Figure 3 It is a structural schematic diagram of the guide block of the present invention;

[0021] Figure 4 It is a statistical diagram of metal particles remaining in the plunger body after the plunger body is cleaned according to the present invention;

[0022] Figure 5 It is a statistical diagram of metal particles remaining in the rotor after the rotor is cleaned according to the present invention;

[0023] Figure 6 It is a comparison diagram of the plunger before and after cleaning of the present invention;

[0024] Figure 7 This is a schematic diagram of the cleaning angle of the rotor according to the present invention;

[0025] Figure 8 It is a schematic diagram of the cleaning angle of the plunger body according to the present invention.

[0026] The marks in the attached drawings are: 1- housing, 2- liquid collecting tank, 3- bottom plate, 4- fixed support plate, 5- right clamp seat, 6- first screw rod, 7- clamp seat, 8- second screw rod, 9- left clamp seat, 10- screw rod seat, 11- guide block, 12- through hole, 13- wear-resistant sleeve, 14- left clamp block, 15- right clamp block, 16- back plate, 17- top plate, 18- hydraulic push rod, 19- mounting plate, 20- guide groove, 21- moving seat, 23- mounting seat, 24- adjusting bracket, 25- driven wheel, 26- rack, 27- vertical rod, 28- rotating shaft, 29- rotating rod, 30- fixing clamp, 31- adjusting gear, 32- driving gear. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with embodiments, but is not intended to be limiting of the present invention.

[0028] Embodiment. A method for cleaning a key friction pair comprises the following steps:

[0029] S1. Soak the plunger body, the sliding shoe and the rotor in a hydrocarbon solution to loosen and remove impurities in the plunger body, the sliding shoe and the rotor, and then fix the sliding shoe and the plunger body in the mounting frame of the cleaning device;

[0030] S2. Select a suitable nozzle and install it on the nozzle seat of the cleaning device;

[0031] S3. Adjust the nozzle pressure and flushing time, and flush the plunger body, the sliding shoe and the positive and negative sides of the rotor to complete the cleaning of the friction pair. The nozzle is suitable for pressures of 0.9 to 1.5 MPa to remove machining attachments and 0.3 to 0.9 MPa to remove cleaning residues.

[0032] The flushing angle of the plunger body is as follows Figure 8 As shown, the plunger body is pressure-washed before closing, and the pressure-washing area must ensure Figure 1 The green area pointed by the middle arrow can be fully flushed. To obtain a better cleaning effect, the spray gun head should be inserted into the large hole end of the plunger, and ensure that the liquid sprayed from the gun head forms a 45° angle with the inner wall of the plunger body. The two ends of the plunger body should be flushed forward and backward for more than 3 times, and the total flushing time for a single part should not be less than 1 minute. Figure 4 As shown, the number of metal particles in the size range of 25-50 μm is ≤128, the number of metal particles in the size range of 50-100 μm is ≤58, the number of metal particles in the size range of 100-200 μm is ≤10, and the number of metal particles in the size range of 200-600 μm is ≤0, and the cleaning effect is good.

[0033] Rotor flushing includes cleaning of the working end surface, cleaning of the rotor hole wall and rotor perfusion flushing.

[0034] To clean the working end surface, in order to remove the metal particles after grinding the working surface, a 0.9Mpa hydrocarbon solvent is required with a conical nozzle to clean the rotor holes and steps.

[0035] The cleaning angle of the rotor hole wall is as follows Figure 7 As shown, ensure that the flushing time of each hole is not less than 15s and flush twice in both directions to avoid the water column passing through the through hole in parallel (except for small holes). During the cleaning process, the inclination angle of about 45° should be maintained.

[0036] Zero rotor perfusion flushing, after the parts are flushed, a hose nozzle should be used, and the pressure should be selected to be 0.5Mpa to flush the visible processing appearance of the parts. After the appearance flushing is completed, the rotor holes should be cleaned again. When cleaning, just insert the hose into the rotor hole. Flush each hole for 15s. If the small rotor cannot be inserted, place the hose mouth against the small hole of the rotor for perfusion. The cleaning results are as follows Figure 4 As shown, the number of metal particles in the size range of 25-50 μm is ≤55, the number of metal particles in the size range of 50-100 μm is ≤14, the number of metal particles in the size range of 100-200 μm is ≤1, and the number of metal particles in the size range of 200-600 μm is ≤0.

[0037] Nozzle selection and flushing time are as follows:

[0038] ① Conical nozzle, suitable for deep holes and through holes, the spraying time of the cleaning part is 15s;

[0039] ② Conical nozzle, suitable for cleaning blind areas such as inner cavity and ring groove, the spraying time of the cleaning area is 60s;

[0040] ③ Conical nozzle, suitable for movable joints, the cleaning part spraying time is 60s;

[0041] ④Fan-shaped nozzle, suitable for parts with larger appearance area, the spraying time of cleaning parts is 60 to 120 seconds;

[0042] ⑤Hose nozzle, suitable for inner ring groove and oil circuit perfusion, the cleaning part flushing time is 120s

[0043] ⑥Hose nozzle, suitable for batch washing of parts surface, the washing time of the whole batch of parts is 90s.

[0044] The immersion time of the plunger body, the sliding shoe and the rotor in the S1 is not less than 30 minutes.

[0045] A cleaning device used in a cleaning method for a key friction pair includes a housing 1, wherein a fixing bracket for fixing a plunger body, a sliding shoe or a rotor is provided inside the housing 1, a flushing mechanism for flushing the plunger body, the sliding shoe or the rotor is provided on the upper side of the fixing bracket, and a liquid collecting pool 2 is provided on the lower side of the fixing bracket.

[0046] The fixed bracket includes a bottom plate 3 with a water leakage hole, and vertically arranged fixed support plates 4 are provided on the upper sides of both ends of the bottom plate 3. Two groups of horizontally arranged first screw rods 6 and second screw rods 8 are provided between the two fixed support plates 4. The first screw rods 6 and the second screw rods 8 are provided with multiple groups of clamp seats 7 for fixing the plunger body, the sliding shoe and the rotor, and the distance between adjacent clamp seats 7 is not less than 2 cm.

[0047] The clamping seat 7 includes a left clamping seat 9 and a right clamping seat 5 which are arranged relatively to each other. The left clamping seat 9 includes a screw seat 10 corresponding to the first screw rod 6. A guide block 11 is provided on the lower side of the screw seat 10. A through hole 12 corresponding to the second screw rod 8 is provided in the guide block 11. A wear-resistant sleeve 13 is provided in the through hole 12. A left clamping block 14 is provided on the upper side of the screw seat 10. The right clamping seat 5 includes a screw seat 10 corresponding to the second screw rod 8. A guide block 11 is provided on the upper side of the screw seat 10. A right clamping block 15 is provided on the guide block 11.

[0048] The shower mechanism includes a back plate 16 arranged on the rear side of the fixed bracket, a top plate 17 is arranged on the front side of the upper end of the back plate 16, a hydraulic push rod 18 is arranged on the lower side of the top plate 17, a mounting plate 19 is arranged on the lower side of the hydraulic push rod 18, a guide groove 20 is arranged in the mounting plate 19, a plurality of groups of movable seats 21 that can slide along the guide groove 20 are arranged in the guide groove 20, a mounting seat 23 that can rotate relative to the movable seat 21 is arranged in the middle of the movable seat 21, and an adjustment bracket 24 for adjusting the angle of the spray head is arranged under the mounting seat 23.

[0049] A driven wheel 25 is disposed on the outer side of the upper end of the mounting seat 23 , and a rack 26 for driving the driven wheel 25 is disposed on the upper side of the mounting plate 19 .

[0050] The adjustment bracket 24 includes a vertical rod 27, and a rotating rod 29 that can rotate relative to the vertical rod 27 is provided at the lower end of the vertical rod 27 through a rotating shaft 28. A fixing clamp 30 for fixing the nozzle seat is provided at the end of the rotating rod 29 away from the rotating shaft 28. The rotating rod 29 is integrally arranged with the rotating shaft 28, and an adjusting gear 31 is provided outside the rotating shaft 28. A driving gear 32 for driving the adjusting gear 31 is provided on one side of the vertical rod 27.

[0051] The clamp seat 7 of the present application is used to fix the plunger body, the sliding shoe and the rotor. Through the action of the first screw rod 6 and the second screw rod 8, the left clamp seat 9 and the right clamp seat 5 are driven to move relative to each other to achieve the clamping of parts. The lower parts of the left clamp seat 9 and the right clamp seat 5 of the present application are composed of a guide block 11 and a screw seat 10, which is convenient for replacement. The guide block 11 is used for limiting, and the screw seat 10 is used to cooperate with the first screw rod 6 or the second screw rod 8 to drive the left clamp seat 9 or the right clamp seat 5 to move, thereby achieving the fixation of the cleaning parts.

[0052] As attached Figure 2As shown, the nozzle angle and depth need to be adjusted. By adjusting the flushing angle according to the parts, the hydraulic push rod 18 can adjust the upper and lower positions of the nozzle, that is, adjust the cleaning depth. A guide groove 20 is provided in the mounting plate 19, and the movable seat 21 can move along the guide groove 20 to adjust the nozzle spacing. The angle of the mounting seat 23 can be adjusted by the cooperation of the rack 26 and the driven wheel 25. When the rack 26 moves horizontally, it can drive the driven gear 25 to rotate, so that the mounting seat 23 installed in the movable seat 21 rotates, and further adjusts the direction of the adjustment bracket 24 on the lower side of the mounting seat 23. The adjustment bracket 24 is used to adjust the angle of the nozzle seat. The active gear 32 drives the adjustment gear 31 to rotate, so that the rotating rod 29 and the rotating shaft 28 rotate around the vertical rod 27 to adjust the flushing angle. In the nozzle seat fixing and fixing clamp 30, the rear side of the nozzle seat is connected to a hose. The nozzle seat is an existing nozzle seat with a quick-connect function. The nozzle is replaced by a mobile connection to adapt to different models of key friction pairs.

Claims

1. A method for cleaning a key friction pair, characterized in that: The following steps are involved: S1. Soak the plunger body, the sliding shoe and the rotor in a hydrocarbon solution to loosen and remove impurities in the plunger body, the sliding shoe and the rotor, and then fix the sliding shoe and the plunger body in the mounting frame of the cleaning device; S2. Select a suitable nozzle and install it on the nozzle seat of the cleaning device; S3. Adjust the nozzle pressure and flushing time, and flush the plunger body, sliding shoe and the front and back sides of the rotor to complete the cleaning of the friction pair.

2. A method for cleaning a key friction pair according to claim 1, characterized in that: The immersion time of the plunger body, the sliding shoe and the rotor in the S1 is not less than 30 minutes.

3. A method for cleaning a key friction pair according to claim 1, characterized in that: The S3 nozzle pressure adjustment is specifically 0.9-1.5 MPa for removing processing attachments and 0.3-0.9 MPa for removing cleaning residues.

4. A cleaning device used in a cleaning method for a key friction pair, characterized in that: The invention comprises a casing (1), wherein a fixing bracket for fixing a plunger body, a sliding shoe or a rotor is provided inside the casing (1), a flushing mechanism for flushing the plunger body, the sliding shoe or the rotor is provided on the upper side of the fixing bracket, and a liquid collecting pool (2) is provided on the lower side of the fixing bracket.

5. The cleaning device used in the cleaning method of a key friction pair according to claim 4 is characterized in that: The fixing bracket comprises a bottom plate (3) with a water leakage hole, and vertically arranged fixing support plates (4) are arranged on the upper sides of both ends of the bottom plate (3), and two groups of horizontally arranged first screw rods (6) and second screw rods (8) are arranged between the two fixing support plates (4), and multiple groups of clamping seats (7) for fixing the plunger body, the sliding shoe and the rotor are arranged on the first screw rod (6) and the second screw rod (8), and the spacing between adjacent clamping seats (7) is not less than 2 cm.

6. The cleaning device used in the cleaning method of a key friction pair according to claim 5 is characterized in that: The clamping seat (7) comprises a left clamping seat (9) and a right clamping seat (5) which are arranged opposite to each other. The left clamping seat (9) comprises a screw seat (10) corresponding to the first screw rod (6). A guide block (11) is arranged at the lower side of the screw seat (10). A through hole (12) corresponding to the second screw rod (8) is arranged in the guide block (11). A wear-resistant sleeve (13) is arranged in the through hole (12). A left clamping block (14) is arranged at the upper side of the screw seat (10). The right clamping seat (5) comprises a screw seat (10) corresponding to the second screw rod (8). A guide block (11) is arranged at the upper side of the screw seat (10). A right clamping block (15) is arranged on the guide block (11).

7. The cleaning device used in the cleaning method of a key friction pair according to claim 4 is characterized in that: The shower mechanism comprises a back plate (16) arranged at the rear side of a fixed bracket, a top plate (17) is arranged at the front side of the upper end of the back plate (16), a hydraulic push rod (18) is arranged at the lower side of the top plate (17), a mounting plate (19) is arranged at the lower side of the hydraulic push rod (18), a guide groove (20) is arranged in the mounting plate (19), a plurality of groups of movable seats (21) that can slide along the guide groove (20) are arranged in the guide groove (20), a mounting seat (23) that can rotate relative to the movable seat (21) is arranged in the middle of the movable seat (21), and an adjustment bracket (24) for adjusting the angle of the spray head is arranged under the mounting seat (23).

8. The cleaning device used in the cleaning method of a key friction pair according to claim 7, characterized in that: A driven wheel (25) is arranged on the outer side of the upper end of the mounting seat (23), and a rack (26) for driving the driven wheel (25) is arranged on the upper side of the mounting plate (19).

9. The cleaning device used in the cleaning method of a key friction pair according to claim 7, characterized in that: The adjustment bracket (24) comprises a vertical rod (27), a rotating rod (29) which can rotate relative to the vertical rod (27) is provided at the lower end of the vertical rod (27) via a rotating shaft (28), a fixing clamp (30) for fixing the nozzle seat is provided at the end of the rotating rod (29) away from the rotating shaft (28), the rotating rod (29) is integrally arranged with the rotating shaft (28), an adjusting gear (31) is provided outside the rotating shaft (28), and a driving gear (32) for driving the adjusting gear (31) is provided on one side of the vertical rod (27).

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