A vane pump vane flat grinding device

Abstract

The application discloses a vane flat grinding device of a vane pump, which comprises a supporting table, a first L-shaped plate is fixedly connected to the left side of the supporting table, an upper end of the first L-shaped plate is fixedly connected with a horizontal plate, a lower end of the horizontal plate is fixedly connected with an electric telescopic rod, a telescopic end of the electric telescopic rod is fixedly connected with a pressing disc, two guide rods are symmetrically fixedly connected to the upper end of the pressing disc, the upper ends of the two guide rods are both penetrated through the horizontal plate and are slidably connected, a rotating rod is rotatably connected to the upper end of the supporting table, and the upper end of the rotating rod is fixedly connected with a rotating column; and a placing mechanism comprises a placing groove which is vertically penetrated through the rotating column. In actual use, the device can realize grinding of multiple surfaces at the same time through cooperation of the first arc-shaped friction layer, the second arc-shaped friction layer and the rectangular friction layer, greatly improves the overall grinding efficiency, and can also collect the grinding debris.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vane machining, in particular to a vane pump vane flat grinding device. BACKGROUND

[0002] The vane pump is a power element, which press the liquid from the oil suction side to the oil discharge side by the interaction of the vane in the rotor groove and the pump shell. The vane pump is mainly composed of a stator, a rotor, vanes, a pump body and an end cover. The rotor and the stator are coaxial, the inner surface of the stator is approximately elliptical, the rotor has a groove, and the vane is placed in the groove and can slide along the groove. When the rotor rotates, the vane is pressed to the inner surface of the stator due to centrifugal phenomenon, and the vane reciprocally slides in the groove along with the change of the curve of the inner surface of the stator, so that the closed volume formed by the adjacent two vanes is enlarged or reduced. When the volume is enlarged, the oil suction process is formed, and when the volume is reduced, the oil press process is formed.

[0003] The vane of the vane pump is an important component, which is a rectangular metal. After the machining process and the forming, there is a certain burr on the surface, and the end face processing operation is needed at this time. In the end face processing process in the prior art, the vane needs to be limited, and the end face is polished. After the single side polishing is completed, the vane needs to be removed and positioned again for polishing, which leads to a long time for polishing the six faces. Therefore, how to solve this problem needs to be considered. SUMMARY

[0004] The purpose of the present application is to solve the problems in the prior art, and a vane pump vane flat grinding device is provided. The device can realize simultaneous polishing of multiple faces by cooperation of the first arc friction layer, the second arc friction layer and the rectangular friction layer, greatly improving the overall polishing efficiency, and the debris after polishing can be collected.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The utility model provides a kind of vane pump vane flat grinding device, including support platform, the left side of the support platform is fixedly connected with first L-shaped plate, the upper end of the first L-shaped plate is fixedly connected with horizontal plate, the lower end of the horizontal plate is fixedly connected with electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected with down pressure disc, the upper end of the down pressure disc is fixedly connected with two guide rods in symmetry, the upper end of two the guide rods all penetrates horizontal plate, and is slidably connected, the upper end of the support platform is rotatably connected with rotating rod, and the upper end of the rotating rod is fixedly connected with rotating column;Placement mechanism, the placement mechanism includes vertical through rotating column placement slot, the placement slot is provided with backshaped frame, the side wall of the backshaped frame is fixedly connected with two connecting blocks, the other side of two the connecting blocks is all fixedly connected with the inner wall of placement slot, the upper end of the rotating column is provided with annular groove, and multiple the placement slot all penetrates annular groove;Flat grinding mechanism, the flat grinding mechanism includes multiple backshaped friction layers arranged in the inner side of backshaped frame, the lower end of the down pressure disc is provided with first annular friction layer, and the upper end of the support platform is provided with second annular friction layer;Rotating mechanism, the rotating mechanism is used to drive rotating column rotation;Magnetic adsorption mechanism, the magnetic adsorption mechanism cooperates with rotating mechanism;Negative pressure collection mechanism, the negative pressure collection mechanism is used to concentrate collection and collect grinding chippings.

[0007] Preferably, the rotating mechanism includes a double-shaft motor mounted on the right side of the support platform, the upper end output shaft of the double-shaft motor is fixedly connected with a gear, the outer side of the rotating column is fixedly connected with a gear ring, and the gear ring is engaged with the gear.

[0008] Preferably, the magnetic adsorption mechanism includes a first annular electromagnet embedded in the interior of the down pressure disc, and a second annular electromagnet embedded in the interior of the support platform.

[0009] Preferably, two sliding cavities are formed in the interior of the support platform, two sliding plates that can slide up and down are arranged in the two sliding cavities, the lower end of each of the two sliding plates is elastically connected to the inner bottom of the sliding cavity through a second spring, the upper end of each of the two sliding plates is fixedly connected with a round head abutting rod, the upper end of each of the two round head abutting rods penetrates the inner top of the corresponding sliding cavity, the lower end of the rotating column is fixedly connected with an arc-shaped abutting strip, and the arc-shaped abutting strip cooperates with the two round head abutting rods.

[0010] Preferably, a non-self-locking press switch is mounted on the inner bottom of each of the two sliding cavities, the non-self-locking press switch on the left side is electrically connected with the second annular electromagnet, and the non-self-locking press switch on the right side is electrically connected with the first annular electromagnet.

[0011] Preferably, the negative pressure collecting mechanism comprises a second L-shaped plate fixedly connected to the right side of the support table, a piston cylinder fixedly connected to the left side of the vertical part of the second L-shaped plate, a first piston plate slidably arranged in the piston cylinder, a lower end output shaft of the double-shaft motor fixedly connected to a rotating disc, a connecting rod rotatably connected to the eccentric lower end of the rotating disc, and the other end of the connecting rod rotatably connected to the left side of the rotating disc.

[0012] Preferably, the vertical part of the first L-shaped plate is fixedly connected to a cylindrical hollow cylinder, the cylindrical hollow cylinder is provided with a second piston plate slidably arranged therein, the right side of the second piston plate is elastically connected to the right inner wall of the cylindrical hollow cylinder through a first spring, the left side space of the cylindrical hollow cylinder is communicated with the outside through a release opening, the left side space of the cylindrical hollow cylinder is communicated with the right side space of the piston cylinder through a first one-way pipe, the right side space of the piston cylinder is communicated with the outside through a first one-way opening, the inside of the support table is provided with a negative pressure cavity, the left side space of the negative pressure cavity is communicated with the right side space of the cylindrical hollow cylinder through a second one-way pipe, and the right side space of the cylindrical hollow cylinder is communicated with the outside through a second one-way opening.

[0013] Preferably, one-way valves are mounted in the first one-way pipe, the second one-way pipe, the first one-way opening and the second one-way opening, the flow direction of the one-way valve in the first one-way pipe is that the right side space of the piston cylinder unidirectionally enters the left side space of the cylindrical hollow cylinder, the flow direction of the one-way valve in the second one-way pipe is that the negative pressure cavity unidirectionally enters the right side space of the cylindrical hollow cylinder, the flow direction of the one-way valve in the first one-way opening is from right to left, and the flow direction of the one-way valve in the second one-way opening is from left to right.

[0014] Preferably, the rotating column is internally provided with an adsorption cavity, the adsorption cavity is in communication with a plurality of placement grooves through a plurality of adsorption openings, a rotating pipe is vertically arranged on the rotating rod, the rotating pipe is fixedly connected to the rotating rod, the upper end of the rotating pipe extends into the adsorption cavity, the lower end of the rotating pipe extends into the negative pressure cavity, a filter screen is vertically arranged in the left side space of the negative pressure cavity, and a sealing door is arranged on the inner bottom of the negative pressure cavity.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The first annular electromagnet, the second annular electromagnet, the first annular friction layer, the second annular friction layer and the back-shaped friction layer are arranged, so that the upper and lower end faces of the blade can be polished, the outer side face of the blade is in contact with the back-shaped friction layer during the up-down movement of the blade, and the polishing of the outer side face is realized, so that the polishing of six faces is realized at the same time, and the overall polishing efficiency is improved.

[0017] 2. Compared with existing flat grinding devices, this device can grind multiple blades at once, and no limit operation is required during grinding. This method further improves the overall grinding efficiency.

[0018] 3. Because the first and second annular electromagnets are intermittently energized, the debris generated during grinding will be repeatedly attracted by the first and second annular electromagnets and will not spread directly to the surrounding area, thus avoiding the situation where the metal dust generated during grinding spreads to the surrounding area.

[0019] 4. After the motor is turned off, the negative pressure chamber is under negative pressure. The gas in the multiple placement slots will be drawn into the negative pressure chamber through the rotating tube, adsorption chamber and adsorption port. In this way, the falling metal powder will be drawn into the negative pressure chamber with the airflow and collected, realizing centralized collection.

[0020] This invention significantly improves blade grinding efficiency by simultaneously grinding all six surfaces of the blade through a multi-directional friction design. Its batch processing capability further accelerates the grinding process, and the intermittent energization of the electromagnet effectively controls debris diffusion. After shutdown, the negative pressure system collects the metal powder generated during grinding, simplifying subsequent cleaning. In summary, this invention not only provides highly efficient grinding but also achieves environmentally friendly operation and convenient maintenance. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a vane pump blade grinding device proposed in this invention;

[0022] Figure 2 for Figure 1 Partial cross-sectional schematic diagram;

[0023] Figure 3 for Figure 2 Enlarged view of point A;

[0024] Figure 4 for Figure 2 An enlarged schematic diagram of a cylindrical hollow tube;

[0025] Figure 5 for Figure 1 A schematic diagram of the structure after removing the rotating column;

[0026] Figure 6 This is a schematic diagram of the rotating mechanism;

[0027] Figure 7 for Figure 6 A diagram showing the upward-looking perspective.

[0028] In the figure: 1 support table, 2 first L-shaped plate, 3 cross plate, 4 double-shaft motor, 5 gear, 6 rotating disc, 7 second L-shaped plate, 8 piston cylinder, 9 first one-way pipe, 10 first one-way port, 11 lower pressing disc, 12 guide rod, 13 electric telescopic rod, 14 rotating column, 15 gear ring, 16 columnar hollow cylinder, 17 second one-way port, 18 first annular electromagnet, 19 first annular friction layer, 20 negative pressure cavity, 21 sealing door, 22 filter screen, 23 second one-way pipe, 24 second annular electromagnet, 25 rotating pipe, 26 rotating rod, 27 adsorption cavity, 28 adsorption port, 29 placing groove, 30 back-shaped frame, 31 connecting block, 32 sliding cavity, 33 second spring, 34 non-self-locking pressing switch, 35 sliding plate, 36 round head abutting rod, 37 second annular friction layer, 38 release port, 39 second piston plate, 40 first spring, 41 first piston plate, 42 annular groove, 43 arc-shaped abutting strip, 44 connecting rod. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application.

[0030] Reference Figures 1-7 A vane pump vane flat grinding device, comprising a support table 1, a first L-shaped plate 2 is fixedly connected to the left side of the support table 1, a cross plate 3 is fixedly connected to the upper end of the first L-shaped plate 2, an electric telescopic rod 13 is fixedly connected to the lower end of the cross plate 3, a lower pressing disc 11 is fixedly connected to the telescopic end of the electric telescopic rod 13, two guide rods 12 are symmetrically fixedly connected to the upper end of the lower pressing disc 11, the upper ends of the two guide rods 12 are both penetrated through the cross plate 3 and are slidingly connected, the use of the guide rods 12 can make the up-and-down movement of the lower pressing disc 11 more stable, a rotating rod 26 is rotationally connected to the upper end of the support table 1, and a rotating column 14 is fixedly connected to the upper end of the rotating rod 26;

[0031] As an embodiment of the application, a placing mechanism is further included, the placing mechanism comprises a placing groove 29 vertically penetrating through the rotating column 14, a back-shaped frame 30 is arranged in the placing groove 29, two connecting blocks 31 are fixedly connected to the side wall of the back-shaped frame 30, the other sides of the two connecting blocks 31 are both fixedly connected to the inner wall of the placing groove 29, an annular groove 42 is arranged at the upper end of the rotating column 14, and a plurality of placing grooves 29 are penetrated through the annular groove 42;

[0032] As an embodiment of the application, a flat grinding mechanism is further included, the flat grinding mechanism comprises a plurality of back-shaped friction layers arranged on the inner side of the back-shaped frame 30, a first annular friction layer 19 is arranged at the lower end of the lower pressing disc 11, and a second annular friction layer 37 is arranged at the upper end of the support table 1; the first friction layer 19, the second friction layer 37 and the back-shaped friction layer herein are all arranged in a detachable manner at the corresponding positions, which facilitates subsequent replacement;

[0033] As one of the embodiments of the present application, the rotating mechanism is used to drive the rotating column 14 to rotate, and the rotating mechanism comprises a double-shaft motor 4 installed on the right side of the support table 1, the upper end output shaft of the double-shaft motor 4 is fixedly connected with a gear 5, and the outer side of the rotating column 14 is fixedly connected with a gear ring 15 which is engaged with the gear 5;

[0034] As one of the embodiments of the present application, the magnetic adsorption mechanism is matched with the rotating mechanism, and the magnetic adsorption mechanism comprises a first annular electromagnet 18 embedded in the inside of the pressing disc 11, a second annular electromagnet 24 embedded in the inside of the support table 1, two slide cavities 32 formed in the inside of the support table 1, two slide plates 35 slidably arranged in the two slide cavities 32, the lower end of each of the two slide plates 35 being elastically connected with the inner bottom of the slide cavity 32 through a second spring 33, the upper end of each of the two slide plates 35 being fixedly connected with a round head abutting rod 36, the upper end of each of the two round head abutting rods 36 penetrating through the inner top of the corresponding slide cavity 32, the lower end of the rotating column 14 being fixedly connected with an arc-shaped abutting strip 43 matched with the two round head abutting rods 36, the inner bottom of each of the two slide cavities 32 being installed with a non-self-locking press switch 34, the non-self-locking press switch 34 on the left side being electrically connected with the second annular electromagnet 24, and the non-self-locking press switch 34 on the right side being electrically connected with the first annular electromagnet 18;

[0035] As one of the embodiments of the present application, the negative pressure collecting mechanism is used to collect the polishing debris, and the negative pressure collecting mechanism comprises a second L-shaped plate 7 fixedly connected on the right side of the support table 1, a piston cylinder 8 fixedly connected on the left side of the vertical part of the second L-shaped plate 7, a first piston plate 41 slidably arranged in the piston cylinder 8, a rotating disc 6 fixedly connected with the lower end output shaft of the double-shaft motor 4, a connecting rod 44 rotatably connected with the lower end eccentric part of the rotating disc 6, the other end of the connecting rod 44 being rotatably connected with the left side of the rotating disc 6, a columnar hollow cylinder 16 fixedly connected on the left side of the vertical part of the first L-shaped plate 2, a second piston plate 39 slidably arranged in the columnar hollow cylinder 16, the right side of the second piston plate 39 being elastically connected with the right side inner wall of the columnar hollow cylinder 16 through a first spring 40, the left side space of the columnar hollow cylinder 16 being communicated with the outside through a release port 38, a normally open electromagnetic valve being installed in the release port 38, the normally open electromagnetic valve being sealed when powered on, the normally open electromagnetic valve and the double-shaft motor 4 being in the same series circuit, the left side space of the columnar hollow cylinder 16 and the right side space of the piston cylinder 8 being communicated through a first one-way pipe 9, the right side space of the piston cylinder 8 being communicated with the outside through a first one-way port 10, a negative pressure cavity 20 being arranged in the inside of the support table 1, the left side space of the negative pressure cavity 20 and the right side space of the columnar hollow cylinder 16 being communicated through a second one-way pipe 23, and the right side space of the columnar hollow cylinder 16 being communicated with the outside through a second one-way port 17;

[0036] As one embodiment of the present application, the first one-way pipe 9, the second one-way pipe 23, the first one-way port 10 and the second one-way port 17 are internally provided with one-way valves, the flow direction of the one-way valve in the first one-way pipe 9 is from the right side space of the piston cylinder 8 to the left side space of the cylindrical hollow cylinder 16, the flow direction of the one-way valve in the second one-way pipe 23 is from the negative pressure cavity 20 to the right side space of the cylindrical hollow cylinder 16, the flow direction of the one-way valve in the first one-way port 10 is from right to left, the flow direction of the one-way valve in the second one-way port 17 is from left to right, the rotating column 14 is internally provided with an adsorption cavity 27, the adsorption cavity 27 is in communication with a plurality of placement grooves 29 through a plurality of adsorption ports 28, a rotating pipe 25 is vertically arranged on the rotating rod 26 and fixedly connected with the rotating rod 26, the upper end of the rotating pipe 25 extends into the adsorption cavity 27, the lower end of the rotating pipe 25 extends into the negative pressure cavity 20, and the left side space of the negative pressure cavity 20 is vertically provided with a filter screen 22, and the inner bottom of the negative pressure cavity 20 is provided with a sealing door 21.

[0037] In the present application, when in use, a plurality of rectangular blades are inserted into a plurality of back-shaped frames 30 and are in contact with the back-shaped friction layer and are connected in a sliding manner. Since polishing is required, the back-shaped friction layer is in full contact with the side surface of the blade, and the friction force generated is relatively large.

[0038] Then the staff starts the electric telescopic rod 13 to extend, so that the lower pressing disc 11 moves downward, until the first annular friction layer 19 enters the annular groove 42, and the lower end surface of the lower pressing disc 11 does not contact the upper end surface of the rotating column 14, and there is a small gap.

[0039] The double-shaft motor 4 is started, and the starting of the motor 4 drives the gear 5 to rotate the gear ring 15, the rotation of the gear ring 15 drives the rotating column 14 to rotate, the rotation of the rotating column 14 makes the arc-shaped abutting strip 43 intermittently contact the two round head abutting rods 36. When the rotating column 14 contacts the left round head abutting rod 36, the left round head abutting rod 36 is abutted and moves downward, the downward movement of the round head abutting rod 36 drives the left sliding plate 35 to move downward, compresses the second spring 33, and makes the sliding plate 35 trigger the left non-self-locking press switch 34, so that the first annular electromagnet 18 is energized. When the rotating column 14 contacts the right round head abutting rod 36 (the left non-self-locking press switch 34 is no longer pressed and is de-energized), the right round head abutting rod 36 is abutted and moves downward, the downward movement of the round head abutting rod 36 drives the right sliding plate 35 to move downward, and the second annular electromagnet 24 is energized.

[0040] Also just in the process of starting the double-shaft motor 4, the first annular electromagnet 18 and the second annular electromagnet 24 will be intermittently powered, after the first annular electromagnet 18 is powered, it will attract the blade to move up (the scheme is aimed at the iron-containing metal blade), the second annular electromagnet 24 will attract the blade to move down, after the blade moves up, its upper end surface will contact the first annular friction layer 19, and with rotation, relative friction with the first annular friction layer 19 will occur, realizing the polishing of the upper end surface, while the blade moves up and down, its outer side surface contacts the back-shaped friction layer, realizing the polishing of the outer side surface, in the above-mentioned manner, six surfaces can be polished at the same time, improving the overall polishing efficiency;

[0041] In the polishing process, since the first annular electromagnet 18 and the second annular electromagnet 24 are intermittently powered, the debris generated by polishing will be attracted by the first annular electromagnet 18 and the second annular electromagnet 24, and will not directly diffuse to the surrounding, avoiding the situation that the metal dust generated by polishing diffuses to the surrounding;

[0042] It should be noted that after the double-shaft motor 4 is started (the normally open electromagnetic valve is powered and sealed, and the release port 38 is sealed), the first piston plate 41 will move left and right reciprocally through the cooperation of the rotating disc 6 and the connecting rod 44, the left and right reciprocating movement of the first piston plate 41 will drive the gas to be continuously pumped into the left space of the columnar hollow cylinder 16 through the one-way valve in the first one-way pipe 9 and the first one-way port 10, and push the second piston plate 39 to move right, and compress the first spring 40, as the gas pumped in more and more, the compression amplitude of the first spring 40 becomes larger and larger, when the double-shaft motor 4 is disconnected, the first annular electromagnet 18 just completes one triggering, it just changes from the powered state to the unpowered state, the arc-shaped abutting strip 43 is just not in contact with the left and right two round head abutting rods 36, at this time, the metal powder attracted on the lower end surface of the lower pressing disc 11 will move down under the action of gravity, and after the normally open electromagnetic valve is powered off, the release port 38 is connected, under the elastic action of the first spring 40, the second piston plate 39 will quickly move left, and the gas in the left space is discharged, at the same time, after the second piston plate 39 moves left, it will draw the gas in the negative pressure cavity 20 to negative pressure through the second one-way pipe 23, the negative pressure cavity 20 is in negative pressure, it will draw the gas in the multiple placing grooves 29 into the negative pressure cavity 20 through the rotating pipe 25, the suction cavity 27 and the suction port 28, in this way, the falling metal powder will be sucked into the negative pressure cavity 20 along with the airflow and be collected, realizing concentrated collection;

[0043] Finally, the electric telescopic rod 13 is started to retract, and the multiple blades can be taken off.

[0044] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A vane pump vane flattening device, characterized by, The utility model provides a support table (1) left side fixedly connected with first L -shaped board (2), first L -shaped board (2) upper end fixedly connected with horizontal plate (3), horizontal plate (3) lower end fixedly connected with electric telescopic handle (13), electric telescopic handle (13) telescopic end fixedly connected with lower pressure disc (11), lower pressure disc (11) upper end symmetry fixedly connected with two guide rods (12), two guide rods (12) upper end all through horizontal plate (3) and are slidably connected, support table (1) upper end rotatably connected with rotating rod (26), rotating rod (26) upper end fixedly connected with rotating column (14), The placing mechanism includes a placing slot (29) vertically penetrating the rotating column (14), a back-shaped frame (30) is arranged in the placing slot (29), two connecting blocks (31) are fixedly connected to the side wall of the back-shaped frame (30), the other sides of the two connecting blocks (31) are fixedly connected to the inner wall of the placing slot (29), and a ring-shaped groove (42) is formed in the upper end of the rotating column (14), and a plurality of placing slots (29) penetrate the ring-shaped groove (42), The flat grinding mechanism includes a plurality of back-shaped friction layers arranged on the inner side of the back-shaped frame (30), a first annular friction layer (19) is arranged at the lower end of the lower pressure disc (11), and a second annular friction layer (37) is arranged at the upper end of the support table (1), The rotating mechanism is used for driving the rotating column (14) to rotate, and includes a double-shaft motor (4) mounted on the right side of the support table (1), a gear (5) fixedly connected to the upper end output shaft of the double-shaft motor (4), and a gear ring (15) fixedly connected to the outer side of the rotating column (14), and the gear ring (15) is engaged with the gear (5), The magnetic adsorption mechanism cooperates with the rotating mechanism, and includes a first annular electromagnet (18) embedded in the lower pressure disc (11), a second annular electromagnet (24) embedded in the support table (1), two sliding cavities (32) formed in the support table (1), two sliding plates (35) slidably arranged in the two sliding cavities (32), the lower ends of the two sliding plates (35) elastically connected to the inner bottom of the sliding cavity (32) through the second spring (33), the upper ends of the two sliding plates (35) fixedly connected to the round head abutting rods (36), the upper ends of the two round head abutting rods (36) penetrating the inner top of the corresponding sliding cavity (32), the lower end of the rotating column (14) fixedly connected to the arc-shaped abutting strip (43), the arc-shaped abutting strip (43) cooperating with the two round head abutting rods (36), the non-self-locking press switches (34) mounted in the inner bottom of the two sliding cavities (32), the left non-self-locking press switch (34) electrically connected to the second annular electromagnet (24), and the right non-self-locking press switch (34) electrically connected to the first annular electromagnet (18). ​ The negative pressure collecting mechanism is used for centralized collection of polishing debris.

2. A vane wear device for a vane pump according to claim 1, wherein The vertical part of the first L-shaped plate (2) is fixedly connected with a cylindrical hollow cylinder (16), the cylindrical hollow cylinder (16) is provided with a second piston plate (39) which can slide left and right, the right side of the second piston plate (39) is elastically connected with the right inner wall of the cylindrical hollow cylinder (16) through a first spring (40), the left side space of the cylindrical hollow cylinder (16) is communicated with the outside through a release port (38), the left side space of the cylindrical hollow cylinder (16) is communicated with the right side space of the piston cylinder (8) through a first one-way pipe (9), the right side space of the piston cylinder (8) is communicated with the outside through a first one-way port (10), the inside of the support table (1) is provided with a negative pressure cavity (20), the left side space of the negative pressure cavity (20) is communicated with the right side space of the cylindrical hollow cylinder (16) through a second one-way pipe (23), the right side space of the cylindrical hollow cylinder (16) is communicated with the outside through a second one-way port (17).

3. A blade lapping device for a vane pump according to claim 2, wherein The inside of the first one-way pipe (9), the second one-way pipe (23), the first one-way port (10) and the second one-way port (17) is mounted with a one-way valve, the flow direction of the one-way valve in the first one-way pipe (9) is that the right side space of the piston cylinder (8) unidirectionally enters the left side space of the cylindrical hollow cylinder (16), the flow direction of the one-way valve in the second one-way pipe (23) is that the negative pressure cavity (20) unidirectionally enters the right side space of the cylindrical hollow cylinder (16), the flow direction of the one-way valve in the first one-way port (10) is from right to left, the flow direction of the one-way valve in the second one-way port (17) is from left to right.

4. A blade lapping device for a vane pump according to claim 3, wherein The inside of the rotating column (14) is provided with an adsorption cavity (27), the inside of the adsorption cavity (27) is communicated with a plurality of placing grooves (29) through a plurality of adsorption ports (28), respectively, a rotating pipe (25) is vertically and penetratingly arranged on the rotating rod (26), the rotating pipe (25) is fixedly connected with the rotating rod (26), the upper end of the rotating pipe (25) extends into the adsorption cavity (27), the lower end of the rotating pipe (25) extends into the inside of the negative pressure cavity (20), the left side space of the negative pressure cavity (20) is vertically mounted with a filter screen (22), the inner bottom of the negative pressure cavity (20) is mounted with a sealing door (21).

5. A vane wear device for a vane pump as defined in claim 3, wherein ​

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