Micro-grinding tool clamp for centrifugal pump impeller

Abstract

The invention discloses a micro-grinding tool clamp for a centrifugal pump impeller, and belongs to the technical field of machining. The centrifugal pump impeller micro-grinding tool clamp comprises a clamping mechanism and a support, the clamping mechanism is used for clamping an impeller to be ground, the centrifugal pump impeller micro-grinding tool clamp further comprises an arc-shaped rail, a transmission shaft is arranged at the end of the arc-shaped rail, the axial direction of the transmission shaft is parallel to the plane where the arc-shaped rail is located, and the arc-shaped rail is rotationally connected with the support through the transmission shaft; the first driving part is used for driving the transmission shaft to rotate around the axis; the arc-shaped sliding block is connected into the arc-shaped rail in a sliding mode, and the clamping mechanism is connected to the arc-shaped sliding block; the second driving part is used for driving the arc-shaped sliding block to move in the arc-shaped rail; and the locking mechanism is used for locking the position of the arc-shaped sliding block on the arc-shaped rail. According to the micro-grinding tool clamp for the centrifugal pump impeller, the posture of the impeller can be adjusted in all directions so as to meet the grinding requirement for the three-dimensional curved surface of the impeller, and in the impeller grinding process, the stability of the posture of the impeller is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical processing, and in particular to a micro-grinding fixture for a centrifugal pump impeller. Background Art

[0002] As a fluid conveying equipment widely used in industry, agriculture, municipal administration and other fields, the performance of centrifugal pumps directly affects the operating efficiency and stability of the entire system. As the core component of the centrifugal pump, the surface quality and precision of the impeller play a decisive role in the hydraulic performance of the centrifugal pump. In the manufacturing process of the impeller, due to the limitations of casting, machining and other processes, there are often minor defects and uneven roughness on the surface of the impeller. It is necessary to use micro-grinding technology for fine processing to improve the surface quality of the impeller, reduce the flow resistance of the fluid on the impeller surface, reduce energy loss, and thus improve the overall performance of the centrifugal pump. During the grinding process of the impeller, it is necessary to use a fixture to fix the posture of the impeller to prevent the impeller from affecting the grinding accuracy due to displacement or rotation during grinding.

[0003] The existing centrifugal pump impeller micro-grinding fixture has core components including a bracket, a clamping mechanism and an adjusting mechanism. The clamping mechanism is connected to the bracket, and the adjusting mechanism is connected to the clamping mechanism. The clamping mechanism is used to clamp the centrifugal pump impeller to be ground. When the centrifugal pump impeller is ground, the adjusting mechanism is used to adjust the posture of the clamping mechanism, so that the grinding mechanism can perform all-round grinding on the centrifugal pump impeller.

[0004] However, in the existing centrifugal pump impeller micro-grinding fixture, after the adjusting mechanism adjusts the posture of the impeller according to needs, the impeller will be subjected to the grinding force applied to it by the grinding mechanism when being ground. Since the adjusting mechanism is a movable mechanism with a certain degree of mobility, it is difficult for the impeller to maintain the stability of its posture after being subjected to force, thereby affecting the grinding accuracy of the impeller. Summary of the invention

[0005] The purpose of the present invention is to overcome the problems in the prior art and provide a centrifugal pump impeller micro-grinding fixture that can fully adjust the posture of the impeller and ensure the stability of the impeller posture during the impeller grinding process.

[0006] The present invention provides a centrifugal pump impeller micro-grinding fixture, comprising a clamping mechanism and a bracket, wherein the clamping mechanism is arranged on the bracket, and the clamping mechanism is used to clamp the impeller to be ground, and further comprises:

[0007] The arc-shaped track has a transmission shaft at the end, the axial direction of the transmission shaft is parallel to the plane where the arc-shaped track is located, and the arc-shaped track is rotatably connected to the bracket through the transmission shaft;

[0008] A first driving part, connected to the transmission shaft, and used to drive the transmission shaft to rotate around its own axis;

[0009] An arc-shaped slider is slidably connected in the arc-shaped track, and the clamping mechanism is connected to the arc-shaped slider;

[0010] A second driving part, connected to the arc-shaped slider, and used for driving the arc-shaped slider to move in the arc-shaped track;

[0011] The locking mechanism is arranged on the arc-shaped slider, the locking mechanism is connected to the arc-shaped track, and the locking mechanism is used to lock the position of the arc-shaped slider on the arc-shaped track.

[0012] Preferably, the second driving part includes a rotating shaft, a gear and an arc-shaped rack, the arc-shaped rack is arranged on the arc-shaped track, the arc-shaped rack and the arc-shaped track are coaxially arranged, the rotating shaft is provided with a through-shaft hole, the rotating shaft is rotatably connected to the through-shaft hole of the arc-shaped slider, the gear is fixedly connected to the rotating shaft, the gear is gear-engaged with the arc-shaped rack, and a knob is provided at the end of the transmission shaft.

[0013] Preferably, the locking mechanism includes a hydraulic cylinder and a plurality of sockets, wherein the plurality of sockets are arranged on the arc track along the circumference of the arc track, the cylinder body of the hydraulic cylinder is arranged on the arc slider, the hydraulic piston of the hydraulic cylinder is connected to an insert block, and the insert block is inserted into different sockets to limit the arc slider.

[0014] Preferably, a sliding cavity is provided in the arc-shaped sliding block, and hydraulic oil is provided in the sliding cavity. The sliding cavity is connected to the cylinder body, and the axial direction of the sliding cavity is perpendicular to the plane where the arc track is located. A piston head is slidably connected in the sliding cavity, and the piston head is connected to the rotating shaft. A spring is provided outside the rotating shaft, and the spring abuts against the gear. Under the action of the elastic force of the spring, the gear and the arc-shaped rack are disengaged, and the hydraulic oil is in the sliding cavity. The hydraulic piston drives the plug block to be inserted into the socket. When the knob is pressed, the knob drives the rotating shaft to move to one side of the sliding cavity, and the gear can be re-toothed with the arc-shaped rack. The hydraulic oil enters the cylinder body from the sliding cavity, and the hydraulic piston drives the plug block to be pulled out of the socket.

[0015] Preferably, a lifting mechanism is provided between the clamping mechanism and the arc-shaped slider, the lifting mechanism includes a lifting cylinder body and a lifting piston, the lifting cylinder body is connected to the clamping mechanism, the top end of the lifting cylinder body abuts against the impeller, the top end surface of the lifting cylinder body is used to position the impeller, the lifting cylinder body is connected to a hydraulic control circuit, the lifting piston is arranged radially along the arc track, the lifting piston is slidably connected in the lifting cylinder body, and the arc-shaped slider is connected to the lifting piston.

[0016] Preferably, the lifting piston is provided with a limiting groove along its length direction, a limiting slider is slidably connected in the limiting groove, the limiting slider is connected to the lifting cylinder body, and the limiting slider and the limiting groove are used to limit the rotation of the lifting cylinder body relative to the lifting piston.

[0017] Preferably, the first driving part includes a power device and a worm gear mechanism, the power device is connected to a worm of the worm gear mechanism, the worm is rotatably connected to the bracket, and the worm wheel of the worm gear mechanism is connected to the transmission shaft.

[0018] Preferably, the clamping mechanism includes a sleeve and a clamping nut, a threaded hole is provided in the sleeve, the bottom end of the sleeve is connected to the top end face of the lifting cylinder, the sleeve can pass through the center hole of the impeller, the clamping nut is threadedly connected in the threaded hole, and the clamping nut is clamped on the end of the impeller.

[0019] Preferably, the arc track is provided with a wear-resistant coating.

[0020] Preferably, the transmission shaft is detachably connected to the arc track.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: a centrifugal pump impeller micro-grinding fixture of the present invention, in the process of grinding the impeller by the grinding tool, uses the first driving part to drive the transmission shaft to rotate, thereby driving the arc track to rotate around the X axis, thereby driving the clamping mechanism and the impeller to rotate around the X axis to adjust the posture of the impeller in one direction; uses the second driving part to drive the slider to slide in the arc track, thereby driving the clamping mechanism and the impeller to rotate around the Y axis, so as to adjust the posture of the impeller in another direction. Since the axial direction of the transmission shaft is parallel to the plane where the arc track is located, the X axis is perpendicular to the Y axis. During the impeller grinding process, when the impeller rotates around the X axis and the Y axis, the impeller can be fully adjusted in posture to meet the grinding requirements of the three-dimensional curved surface of the impeller. In addition, after the posture of the impeller is adjusted, the locking mechanism is used to lock the position of the arc slider in the arc track, thereby preventing the arc slider from sliding in the arc track during the grinding of the impeller, thereby ensuring the stability of the impeller posture.

[0022] The second driving part of the clamp can accurately adjust the position of the arc-shaped slider on the arc-shaped track by controlling the rotation amount of the knob, thereby realizing accurate adjustment of the impeller posture. The gear drives the piston head to move through the rotating shaft, and the hydraulic piston drives the plug to move toward the side close to the socket until the plug is inserted into the socket, thereby automatically locking the position of the arc-shaped slider, ensuring the timeliness of the locking of the arc-shaped slider position, thereby further improving the stability of the impeller posture during grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the AA surface of the present invention;

[0026] Figure 4 It is a structural schematic diagram of the locking mechanism of the present invention.

[0027] Description of reference numerals:

[0028] 101. Clamping mechanism, 102. Bracket, 103. Impeller, 104. Arc track, 105. Transmission shaft, 106. First driving part, 107. Arc slider, 108. Second driving part, 201. Rotating shaft, 202. Gear, 203. Arc rack, 204. Knob, 301. Socket, 302. Cylinder, 303. Hydraulic piston, 304. Insert, 401. Sliding cavity, 402. Piston head, 403. Spring, 501. Lifting cylinder, 502. Lifting piston, 601. Limiting slide groove, 602. Limiting slider, 701. Worm, 702. Worm wheel, 801. Bushing, 802. Pressing nut. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-Figure 4 , the specific implementation of the present invention is described in detail, but it should be understood that the protection scope of the present invention is not limited by the specific implementation. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] like Figure 1-Figure 4 As shown, a centrifugal pump impeller micro-grinding fixture provided by the present invention includes a clamping mechanism 101 and a bracket 102, wherein the clamping mechanism 101 is arranged on the bracket 102, and the clamping mechanism 101 is used to clamp the impeller 103 to be ground, and also includes: an arc track 104, a first driving part 106, an arc slider 107, a second driving part 108 and a locking mechanism, a transmission shaft 105 is provided at the end of the arc track 104, and the axial direction of the transmission shaft 105 is parallel to the plane where the arc track 104 is located, and the arc track 104 is rotatably connected to the bracket 102 through the transmission shaft 105; the first driving part 106 is connected to the arc track 104, and the arc track 104 is connected to the bracket 102. The arc-shaped slider 107 is connected to the arc-shaped track 104, and the clamping mechanism 101 is connected to the arc-shaped slider 107; the second driving part 108 is connected to the arc-shaped slider 107, and the second driving part 108 is used to drive the arc-shaped slider 107 to move in the arc-shaped track 104; the locking mechanism is arranged on the arc-shaped slider 107, and the locking mechanism is connected to the arc-shaped track 104, and the locking mechanism is used to lock the position of the arc-shaped slider 107 on the arc-shaped track 104.

[0031] The working principle of the above embodiment is briefly described:

[0032] When the device is in use, the clamping mechanism 101 is used to clamp the impeller 103 to be polished, thereby completing the fixation of the impeller 103, and then the polishing tool is used to polish the impeller 103. In the process of the polishing tool polishing the impeller 103, the first driving part 106 is used to drive the transmission shaft 105 to rotate, and the transmission shaft 105 drives the arc track 104 to rotate around the transmission shaft 105 axially, thereby driving the arc track 104 to rotate around the X axis, thereby driving the clamping mechanism 101 and the impeller 103 to rotate around the X axis, thereby adjusting the posture of the impeller 103 in one direction; the second driving part 108 is used to drive the slider to slide in the arc track 104, thereby driving the clamping mechanism 101 and the impeller 103 to rotate around the Y axis, thereby adjusting the posture of the impeller 103 in another direction. Since the axial direction of the transmission shaft 105 is parallel to the plane where the arc track 104 is located, the X-axis is perpendicular to the Y-axis. During the grinding process of the impeller 103, when the impeller 103 rotates around the X-axis and the Y-axis, the impeller 103 can be adjusted in all directions to meet the grinding requirements of the three-dimensional curved surface of the impeller 103. In addition, after the posture of the impeller 103 is adjusted, the locking mechanism is used to lock the position of the arc slider 107 in the arc track 104, thereby preventing the arc slider 107 from sliding in the arc track 104 when the impeller 103 is being ground, thereby ensuring the stability of the posture of the impeller 103.

[0033] The centrifugal pump impeller micro-grinding fixture of the present invention can fully adjust the posture of the impeller 103 during the grinding process of the impeller 103 to meet the grinding requirements of the three-dimensional curved surface of the impeller 103, and ensure the stability of the posture of the impeller 103 during the grinding process of the impeller 103.

[0034] On the basis of the above embodiment, in order to accurately adjust the position of the arc-shaped slider 107 on the arc-shaped track 104, the posture of the impeller 103 can be accurately adjusted.

[0035] like Figure 1 , Figure 3 and Figure 4 As shown, the second driving part 108 includes a rotating shaft 201, a gear 202 and an arc-shaped rack 203, the arc-shaped rack 203 is arranged on the arc-shaped track 104, the arc-shaped rack 203 and the arc-shaped track 104 are coaxially arranged, the rotating shaft 201 is provided with a through-axis hole, the rotating shaft 201 is rotatably connected with the through-axis hole of the arc-shaped slider 107, the gear 202 is fixedly connected with the rotating shaft 201, the gear 202 is gear-engaged with the arc-shaped rack 203, and a knob 204 is provided at the end of the transmission shaft 105.

[0036] When the second driving unit 108 drives the slider to slide in the arc track 104, the knob 204 is rotated, and the knob 204 drives the rotating shaft 201 to rotate, thereby driving the gear 202 to rotate. Since the gear 202 is gear-engaged with the arc rack 203, and the arc rack 203 is arranged on the arc track 104, the gear 202 rolls on the arc rack 203. Since the arc rack 203 and the arc track 104 are coaxially arranged, the gear 202 drives the arc slider 107 to slide in the arc track 104, thereby adjusting the position of the arc slider 107 in the arc track 104. In this process, by controlling the rotation amount of the knob 204, the position of the arc slider 107 on the arc track 104 can be accurately adjusted, thereby realizing accurate adjustment of the posture of the impeller 103.

[0037] As a preferred solution, Figure 2-Figure 4 As shown, the locking mechanism includes a hydraulic cylinder and a plurality of sockets 301, wherein the plurality of sockets 301 are arranged on the arc track 104 along the circumference of the arc track 104, the cylinder body 302 of the hydraulic cylinder is arranged on the arc slider 107, and the hydraulic piston 303 of the hydraulic cylinder is connected to an insert block 304, and the insert block 304 is inserted into different sockets 301 to limit the arc slider 107. When adjusting the posture of the impeller 103, the arc-shaped slider 107 is slid, and the arc-shaped slider 107 drives the hydraulic cylinder to move circumferentially along the arc-shaped track 104. After the position of the arc-shaped slider 107 on the arc-shaped track 104 is adjusted, the plug block 304 connected to the hydraulic piston 303 of the hydraulic cylinder is opposite to a socket 301, and then by controlling the action of the hydraulic cylinder, the hydraulic piston 303 of the hydraulic cylinder drives the plug block 304 to move toward the side close to the socket 301 until the plug block 304 is inserted into the socket 301. Under the action of the plug block 304 and the socket 301, the arc-shaped slider 107 can be prevented from sliding in the arc-shaped track 104 when the impeller 103 is polished, thereby ensuring the stability of the posture of the impeller 103.

[0038] As a preferred solution, Figure 3 and Figure 4As shown, the arc-shaped slider 107 is provided with a sliding cavity 401, the sliding cavity 401 is provided with hydraulic oil, the sliding cavity 401 is communicated with the cylinder body 302, the axial direction of the sliding cavity 401 is perpendicular to the plane where the arc track 104 is located, the sliding cavity 401 is slidably connected with a piston head 402, the piston head 402 is connected to the rotating shaft 201, and the rotating shaft 201 is provided with a spring 403, the spring 403 is in contact with the gear 202, and the elastic force of the spring 403 is Under the action, the gear 202 and the arc-shaped rack 203 are disengaged, the hydraulic oil is in the sliding cavity 401, and the hydraulic piston 303 drives the plug 304 to be inserted into the socket 301. When the knob 204 is pressed, the knob 204 drives the rotating shaft 201 to move to one side of the sliding cavity 401, and the gear 202 can be re-engaged with the arc-shaped rack 203. The hydraulic oil enters the cylinder body 302 from the sliding cavity 401, and the hydraulic piston 303 drives the plug 304 to be pulled out of the socket 301. When driving the arc-shaped slider 107 to slide in the arc-shaped track 104, by pressing and rotating the knob 204, when the knob 204 is pressed, the spring 403 is squeezed by the gear 202, and the knob 204 drives the gear 202, the shaft 201 and the piston head 402 to move toward the side of the slide cavity 401, and the piston head 402 squeezes the hydraulic oil in the slide cavity 401, thereby squeezing the hydraulic oil in the slide cavity 401 into the cylinder body 302, thereby driving the hydraulic piston 303 to move away from the plug hole 301, and the hydraulic piston 303 drives the plug block 304 to move away from the plug hole 301, until the plug block 304 is pulled out of the plug hole 301, so that the locking mechanism automatically releases the restriction on the position of the arc-shaped slider 107. At the same time, when the knob 204 is rotated, the knob 204 drives the shaft 201 to rotate, and the shaft 201 drives the gear 202 to rotate, thereby driving the slider to slide in the arc-shaped track 104. When the position of the arc slide 107 is adjusted, the knob 204 is released, and the elastic force applied by the spring 403 to the gear 202 drives the gear 202 to move to the side away from the sliding cavity 401, so that the gear 202 is out of gear engagement with the rack. At this time, even if the knob 204 is rotated again, the arc slide 107 cannot be driven to slide in the arc track 104, and when the gear 202 moves to the side away from the sliding cavity 401, the gear 202 drives the piston head 402 to move through the rotating shaft 201, thereby sucking the hydraulic oil in the cylinder 302 into the sliding cavity 401, thereby driving the hydraulic piston 303 to move to the side close to the socket 301, and the hydraulic piston 303 drives the plug block 304 to move to the side close to the socket 301 until the plug block 304 is inserted into the socket 301, thereby automatically locking the position of the arc slide 107, ensuring the timeliness of the locking of the position of the arc slide 107, thereby further improving the stability of the posture of the impeller 103 during grinding.

[0039] As a preferred solution, Figure 1-Figure 4As shown, a lifting mechanism is provided between the clamping mechanism 101 and the arc-shaped slider 107, and the lifting mechanism includes a lifting cylinder body 501 and a lifting piston 502. The lifting cylinder body 501 is connected to the clamping mechanism 101, and the top end of the lifting cylinder body 501 abuts against the impeller 103. The top end surface of the lifting cylinder body 501 is used to position the impeller 103. The lifting cylinder body 501 is connected to a hydraulic control circuit, and the lifting piston 502 is arranged along the radial direction of the arc track 104. The lifting piston 502 is slidably connected in the lifting cylinder body 501, and the arc-shaped slider 107 is connected to the lifting piston 502. By setting a lifting mechanism between the clamping mechanism 101 and the arc-shaped slider 107, as the posture of the impeller 103 is adjusted, the distance between different positions of the impeller 103 and the grinding tool changes. At this time, by controlling the action of the hydraulic control circuit, the lifting cylinder 501 of the lifting mechanism is driven to move relative to the lifting piston 502, thereby driving the clamping mechanism 101 to move radially along the arc track 104, thereby adjusting the distance between the surface of the impeller 103 and the grinding tool, thereby ensuring that when the posture of the impeller 103 is adjusted, the grinding tool is separated from the surface of the impeller 103, and the impeller 103 can be continuously and stably ground.

[0040] As a preferred solution, Figure 1-Figure 4 As shown, the lifting piston 502 is provided with a limiting slide groove 601 along its length direction, and a limiting slider 602 is slidably connected in the limiting slide groove 601, and the limiting slider 602 is connected to the lifting cylinder 501. The limiting slider 602 and the limiting slide groove 601 are used to limit the rotation of the lifting cylinder 501 relative to the lifting piston 502. By providing the limiting slide groove 601 and the limiting slider 602, when the lifting cylinder 501 of the lifting mechanism slides relative to the lifting piston 502 of the lifting mechanism, the limiting slide groove 601 and the limiting slider 602 are used to limit the rotation of the lifting cylinder 501 relative to the lifting piston 502, so that when the distance between the impeller 103 and the grinding tool is adjusted, the impeller 103 is prevented from rotating, thereby further ensuring the stability of the posture of the impeller 103 during grinding.

[0041] As a preferred solution, Figure 1 and Figure 2As shown, the first driving part 106 includes a power device and a worm gear mechanism, the power device is connected to the worm 701 of the worm gear mechanism, the worm 701 is rotatably connected to the bracket 102, and the worm wheel 702 of the worm gear mechanism is connected to the transmission shaft 105. When the first driving part 106 drives the transmission shaft 105 to rotate to drive the arc track 104 to rotate, by controlling the action of the power device, the power device rotates through the worm 701, and the worm 701 drives the worm wheel 702 to rotate, thereby driving the transmission shaft 105 to rotate, thereby driving the arc track 104 to rotate, so as to adjust the posture of the impeller 103. After the posture adjustment of the impeller 103 is completed, due to the self-locking property of the worm gear mechanism itself, the worm wheel 702 can be prevented from rotating relative to the worm 701, thereby preventing the transmission shaft 105 from rotating, and further improving the stability of the posture of the impeller 103 during grinding.

[0042] As a preferred solution, Figure 1-Figure 3 As shown, the clamping mechanism 101 includes a sleeve 801 and a clamping nut 802. A threaded hole is provided in the sleeve 801. The bottom end of the sleeve 801 is connected to the top end face of the lifting cylinder 501. The sleeve 801 can pass through the center hole of the impeller 103. The clamping nut 802 is threadedly connected in the threaded hole, and the clamping nut 802 is clamped on the end of the impeller 103. When the clamping mechanism 101 clamps the impeller 103, the center hole of the impeller 103 passes through the sleeve 801, the lower end of the impeller 103 abuts against the upper end face of the lifting cylinder 501, and then the clamping nut 802 is used to clamp the upper end of the impeller 103, so that the impeller 103 is clamped to ensure the stability of the posture of the impeller 103 during grinding.

[0043] As a preferred solution, Figure 1 As shown, a wear-resistant coating is provided on the arc track 104. By providing the wear-resistant coating on the arc track 104, the wear resistance of the arc track 104 can be improved, thereby improving the service life of the entire clamp.

[0044] As a preferred solution, Figure 1 As shown, the transmission shaft 105 is detachably connected to the arc track 104. The transmission shaft 105 and the arc track 104 are detachably connected, which can facilitate the disassembly and installation of the arc track 104, thereby facilitating the maintenance of the entire fixture.

[0045] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A centrifugal pump impeller micro-grinding fixture, comprising a clamping mechanism (101) and a bracket (102), wherein the clamping mechanism (101) is arranged on the bracket (102), and the clamping mechanism (101) is used to clamp the impeller (103) to be ground, characterized in that: Also includes: The arc track (104) has a transmission shaft (105) at its end, the axial direction of the transmission shaft (105) is parallel to the plane where the arc track (104) is located, and the arc track (104) is rotatably connected to the bracket (102) through the transmission shaft (105); A first driving part (106) connected to the transmission shaft (105), the first driving part (106) being used to drive the transmission shaft (105) to rotate around its own axis; An arc-shaped slider (107) is slidably connected in the arc-shaped track (104), and the clamping mechanism (101) is connected to the arc-shaped slider (107); A second driving part (108) connected to the arc-shaped slider (107), the second driving part (108) being used to drive the arc-shaped slider (107) to move in the arc-shaped track (104); A locking mechanism is provided on the arc-shaped slider (107), the locking mechanism is connected to the arc-shaped track (104), and the locking mechanism is used to lock the position of the arc-shaped slider (107) on the arc-shaped track (104).

2. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The second driving part (108) comprises a rotating shaft (201), a gear (202) and an arc-shaped rack (203); the arc-shaped rack (203) is arranged on the arc-shaped track (104); the arc-shaped rack (203) and the arc-shaped track (104) are coaxially arranged; a through-shaft hole is provided on the rotating shaft (201); the rotating shaft (201) is rotatably connected to the through-shaft hole of the arc-shaped slider (107); the gear (202) is fixedly connected to the rotating shaft (201); the gear (202) and the arc-shaped rack (203) are tooth-engaged; and a knob (204) is provided at the end of the transmission shaft (105).

3. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The locking mechanism comprises a hydraulic cylinder and a plurality of insertion holes (301), wherein the plurality of insertion holes (301) are arranged on the arc track (104) along the circumference of the arc track (104), a cylinder body (302) of the hydraulic cylinder is arranged on the arc slide (107), a hydraulic piston (303) of the hydraulic cylinder is connected to an insertion block (304), and the insertion block (304) is inserted into different insertion holes (301) to limit the arc slide (107).

4. The centrifugal pump impeller micro-grinding fixture as claimed in claim 3, characterized in that: The arc-shaped slider (107) is provided with a sliding cavity (401), and hydraulic oil is provided in the sliding cavity (401). The sliding cavity (401) is communicated with the cylinder body (302), and the axial direction of the sliding cavity (401) is perpendicular to the plane where the arc-shaped track (104) is located. A piston head (402) is slidably connected in the sliding cavity (401), and the piston head (402) is connected to the rotating shaft (201). A spring (403) is provided outside the rotating shaft (201), and the spring (403) is in contact with the gear (202). Under the action of the elastic force of the spring (403), The gear (202) is disengaged from the arc-shaped rack (203), the hydraulic oil is in the sliding cavity (401), the hydraulic piston (303) drives the plug (304) to be inserted into the insertion hole (301), and when the knob (204) is pressed, the knob (204) drives the rotating shaft (201) to move toward one side of the sliding cavity (401), the gear (202) can be re-engaged with the arc-shaped rack (203), the hydraulic oil enters the cylinder (302) from the sliding cavity (401), and the hydraulic piston (303) drives the plug (304) to be pulled out of the insertion hole (301).

5. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: A lifting mechanism is provided between the clamping mechanism (101) and the arc-shaped slider (107), and the lifting mechanism comprises a lifting cylinder body (501) and a lifting piston (502). The lifting cylinder body (501) is connected to the clamping mechanism (101), the top end of the lifting cylinder body (501) is in contact with the impeller (103), the top end surface of the lifting cylinder body (501) is used to position the impeller (103), the lifting cylinder body (501) is connected to a hydraulic control circuit, the lifting piston (502) is arranged along the radial direction of the arc-shaped track (104), the lifting piston (502) is slidably connected to the lifting cylinder body (501), and the arc-shaped slider (107) is connected to the lifting piston (502).

6. The centrifugal pump impeller micro-grinding fixture as claimed in claim 5, characterized in that: The lifting piston (502) is provided with a limiting slide groove (601) along its length direction, and a limiting slider (602) is slidably connected in the limiting slide groove (601). The limiting slider (602) is connected to the lifting cylinder body (501), and the limiting slider (602) and the limiting slide groove (601) are used to limit the rotation of the lifting cylinder body (501) relative to the lifting piston (502).

7. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The first driving part (106) comprises a power device and a worm gear mechanism, the power device is connected to a worm (701) of the worm gear mechanism, the worm (701) is rotatably connected to the bracket (102), and the worm wheel (702) of the worm gear mechanism is connected to a transmission shaft (105).

8. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The clamping mechanism (101) comprises a sleeve (801) and a clamping nut (802). A threaded hole is provided in the sleeve (801). The bottom end of the sleeve (801) is connected to the top end surface of the lifting cylinder (501). The sleeve (801) can pass through the center hole of the impeller (103). The clamping nut (802) is threadedly connected to the threaded hole. The clamping nut (802) is clamped on the end of the impeller (103).

9. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The arc track (104) is provided with a wear-resistant coating.

10. The centrifugal pump impeller micro-grinding fixture as claimed in claim 1, characterized in that: The transmission shaft (105) is detachably connected to the arc track (104).

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