A slurry pump with axial force balancing mechanism

Abstract

The present invention provides a slurry pump with an axial force balancing mechanism, which relates to the technical field of slurry pumps; it includes a pump housing, a bearing seat and a main shaft, and also includes an axial balancing mechanism, the axial balancing mechanism includes a mounting seat, a thrust plate and a support assembly; the mounting seat is fixedly connected to the bearing seat, and the main shaft passes through the mounting seat; the thrust plate is fixedly sleeved on the main shaft; the support assembly includes a support unit, a support ring and a rotating ring; the support unit includes a base ring fixedly arranged in a mounting cavity, a support portion arranged on the base ring, and an adjustment portion arranged on the base ring and connected to the support portion; the support ring is supported on the support portion, and the rotating ring is rotatably arranged on the support ring, and the adjustment portion can drive the support portion to move on the base ring, and the movement of the support portion can push the support ring and the rotating ring, so that the distance between the rotating ring and the thrust plate is within a preset distance threshold. The slurry pump with an axial force balancing mechanism of the present invention can prevent the axial displacement of the main shaft from exceeding the limit value.

Description

Technical Field

[0001] The present invention relates to the technical field of slurry pumps, and in particular to a slurry pump with an axial force balancing mechanism. Background Art

[0002] A slurry pump is a centrifugal pump that transports suspended particles in liquid. It is widely used in mining, electricity, metallurgy, coal, environmental protection and other industries to transport slurries containing solid particles, such as ore slurry transportation in metallurgical ore dressing plants, hydraulic ash removal in thermal power plants, coal slurry and heavy medium transportation in coal washing plants, dredging of rivers, river desilting, etc.

[0003] When the slurry pump is running, the different pressures at the suction and discharge ports of the slurry pump will cause unequal liquid pressures on both sides of the impeller, which is not completely symmetrical, to generate axial force. This axial force may cause the main shaft of the slurry pump to move toward the suction port, causing vibration and friction between the outer edge of the impeller inlet and the sealing ring. Due to the existence of friction, the power loss of the slurry pump is increased, the working efficiency of the slurry pump is reduced, and in severe cases, the slurry pump will not work. Especially when multiple slurry pumps are used in series to increase the head, the last-stage slurry pump will be subjected to a huge axial force. In response to the above problems, the Chinese invention patent with application number 202010391722X provides a horizontal multi-stage slurry pump, which arranges permanent magnetic thrust devices on both sides of the main shaft to balance the axial force by using the repulsive force of permanent magnets of the same polarity.

[0004] However, it still has the following defects: when the axial force on the main shaft increases abnormally, the axial displacement of the main shaft may still exceed the bearing range of the bearing and cause bearing damage, thereby affecting the operation of the slurry pump. Summary of the invention

[0005] To this end, the present invention proposes a high-lift slurry pump to at least partially solve the technical problem that the main shaft of the existing multi-stage slurry pump may be damaged due to excessive axial force on the main shaft.

[0006] The technical solution of the present invention is as follows:

[0007] A slurry pump with an axial force balancing mechanism comprises a bearing seat, a main shaft and a pump casing, and also comprises an axial balancing mechanism, wherein the axial balancing mechanism comprises:

[0008] A mounting seat, fixedly connected to the bearing seat, wherein a mounting cavity is provided in the mounting seat, and the main shaft passes through the mounting cavity;

[0009] A thrust plate, fixedly sleeved on the main shaft and located in the mounting cavity;

[0010] A support assembly, comprising a support unit, a support ring and a rotating ring; the support unit comprises a base ring fixedly arranged in the installation cavity, a support portion arranged on the base ring, and an adjustment portion arranged on the base ring and connected to the support portion; the support ring is supported on the support portion, and the rotating ring is rotatably arranged on the support ring;

[0011] The adjusting portion can drive the supporting portion to move on the base ring, and the movement of the supporting portion can push the supporting ring and the rotating ring to adjust the distance between the rotating ring and the thrust plate, and the rotating ring can block the thrust plate to limit the axial displacement of the main shaft.

[0012] Furthermore, a plurality of spherical grooves are provided on the end face of the support ring facing the thrust plate, and a sphere is installed in each of the spherical grooves, and each of the spheres protrudes from the end face of the support ring; the rotating ring includes a ring body abutting against each of the spheres, and an inserted shaft fixedly connected to the ring body and rotatably inserted into the inner hole of the support ring.

[0013] Furthermore, the base ring is provided with a plurality of guide holes, the support ring is provided with corresponding guide columns passing through the guide holes, a limit plate is provided on the end of the guide column away from the support ring, a first elastic member is provided between each limit plate and the base ring, and the first elastic member applies a thrust to the support ring to make the support ring approach the base ring.

[0014] Furthermore, the support portion includes a plurality of first wedge blocks, each of which is arranged on the base ring, and is evenly and spaced apart around the axis of the base ring, and can move on the base ring along the radial direction of the base ring, and the end face of each first wedge block facing the support ring is a first wedge surface; the support ring is provided with a second wedge surface that corresponds to each first wedge surface one by one, and when each first wedge block moves toward the center of the base ring, it can push the support ring away from the base ring.

[0015] Further, the adjustment part includes a central gear coaxial with the main shaft and rotatably arranged on the base ring, three racks meshing with the central gear and circumferentially spaced and evenly distributed around the central gear, a plurality of strip grooves are arranged on the end surface of the rack facing the support ring, each of the strip grooves is parallel and spaced apart, and is inclined relative to the length direction of the rack; a screw and two guide rods are provided on the base ring, the screw is threadedly connected to one of the three racks, the other two of the three racks are slidably sleeved on the corresponding guide rods, and the screw has an extended section extending out of the mounting seat;

[0016] The base ring is provided with three T-slots extending radially along the main shaft, and the first wedge blocks are slidably arranged in the T-slots one by one, and the first wedge blocks are provided with strip blocks that can be inserted into the strip grooves of the corresponding racks; when the screw rotates, the racks move and drive the first wedge blocks to slide in the corresponding T-slots.

[0017] Furthermore, a square mounting hole is constructed on the mounting seat, the protruding section passes through the mounting hole, and two opposite first planes are constructed on the outer periphery of the protruding section; a stopper is inserted into the mounting hole, the outer peripheral surface of the stopper is in contact with the inner wall surface of the mounting hole, and the inner wall surface of the stopper has two second planes that are respectively in contact with the two first planes.

[0018] Furthermore, a square bearing end is constructed on the end of the extending section, two through holes are provided on the bearing end, and a limit piece is provided on the bearing end, the limit piece includes a base located above the bearing end, and a rod body provided on the base and passing through the two through holes, the rod body abuts against the top end surface of the stop piece; and second wedge blocks are respectively provided on the two rod bodies, and a second elastic piece is provided on the base that abuts against the two second wedge blocks respectively.

[0019] Furthermore, a small gear is sleeved on the extending section, and a large gear is rotatably provided on the pump housing, and the large gear is meshed with the small gear; an indicator dial is coaxially fixed to the large gear, and a plurality of scale lines are provided on the disk surface of the indicator dial along the circumference of the indicator dial, and an indicator member is provided on the mounting seat, and the indicator member has an indicator needle that can be rotated to be opposite to one of the scale lines.

[0020] Furthermore, a pressure rod is fixed on the large gear; a push rod is slidably provided on the mounting seat, and a ratchet is rotatably provided, and a marking portion is provided on the mounting seat, and wedge-shaped teeth are retractably provided on the push rod, and numbers are engraved at intervals on the end surface of the ratchet; the pressure rod can periodically push the push rod as the large gear rotates, so that the wedge-shaped teeth push the ratchet to rotate a corresponding angle, so that the numbers on the ratchet are aligned with the marking portion one by one.

[0021] The working principle and beneficial effects of the present invention are:

[0022] The slurry pump with an axial force balancing mechanism provided by the present invention is provided with a base ring fixed relative to the bearing seat in the mounting seat, and a support ring and a rotating ring with an adjustable distance from the base ring are provided on the base ring, and a thrust plate is provided on the main shaft; by setting the distance between the rotating ring and the thrust plate to be below the axial displacement allowed by the bearing, the main shaft can be rotated without being subjected to additional load within the axial displacement that the bearing can withstand, and the blocking of the thrust plate by the rotating ring can prevent the displacement of the main shaft from exceeding the tolerable range of the bearing, thereby effectively ensuring the safe operation of the bearing and the slurry pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] Figure 1 A three-dimensional diagram of a slurry pump with an axial force balancing mechanism provided by an embodiment of the present invention;

[0025] Figure 2 A partial cross-sectional view of a slurry pump with an axial force balancing mechanism provided by an embodiment of the present invention;

[0026] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0027] Figure 4 An exploded diagram of an axial balancing mechanism provided by an embodiment of the present invention;

[0028] Figure 5 An exploded view of the axial balancing mechanism provided by an embodiment of the present invention from another angle;

[0029] Figure 6 An exploded view of a support assembly provided by an embodiment of the present invention;

[0030] Figure 7 An exploded view of a mounting base provided by an embodiment of the present invention;

[0031] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0032] Fig. 9 An exploded view of a mounting base provided by an embodiment of the present invention from another angle;

[0033] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0034] Fig.11 for Fig.10 A partial enlarged view of point D in the middle.

[0035] In the figure:

[0036] 100, pump housing; 200, bearing seat; 300, main shaft; 400, axial balancing mechanism; 410, mounting seat; 411, push rod; 412, wedge-shaped teeth; 413, ratchet; 420, thrust plate; 401, mounting cavity; 402, mounting hole; 500, support assembly; 510, rotating ring; 511, ring body; 512, plug shaft; 520, support ring; 521, guide column; 522, limit plate; 523, first elastic member; 524, second wedge surface; 530, support unit; 531, base ring; 532, first wedge block; 5321, first wedge surface; 5322, strip block; 5 40. Adjustment unit; 541. Center gear; 542. Rack; 550. Guide rod; 560. Screw; 561. Extension section; 562. Rotation end; 563. First plane; 570. Stop member; 571. Second plane; 572. Second permanent magnet; 580. Limit member; 581. Rod body; 582. Second wedge block; 590. Ball; 501. Guide hole; 502. Strip groove; 503. T-slot; 610. Pinion; 620. Gear; 621. Pressure rod; 630. Indicator plate; 631. Raised strip; 640. Indicator needle; 650. Mounting rod; 601. Through hole. DETAILED DESCRIPTION

[0037] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] This embodiment provides a slurry pump with an axial force balancing mechanism, which will be referred to as a slurry pump in the following text. Figure 1 As shown, it includes a pump housing 100, a bearing seat 200 and a main shaft 300, and also includes an axial balancing mechanism 400. The structures of the bearing seat 200, the main shaft 300 and the pump housing 100 can all refer to the prior art and will not be described in detail here.

[0039] refer to Figures 1 to 3 As shown, the axial balancing mechanism 400 of this embodiment includes a mounting seat 410, a thrust plate 420 and a support assembly 500. The mounting seat 410 is fixedly connected to the bearing seat 200, and a mounting cavity 401 is provided in the mounting seat 410, and the aforementioned main shaft 300 passes through the mounting cavity 401. The thrust plate 420 of this embodiment is fixedly sleeved on the main shaft 300 and is located in the mounting cavity 401.

[0040] refer to Figures 2 to 4As shown, the support assembly 500 of this embodiment includes a support unit 530, a support ring 520 and a rotating ring 510. The support unit 530 includes a base ring 531 fixed in the installation cavity 401, a support portion provided on the base ring 531, and an adjustment portion 540 provided on the base ring 531 and connected to the support portion; the support ring 520 is supported on the support portion, and the rotating ring 510 is rotatably provided on the support ring 520.

[0041] The adjusting portion 540 of this embodiment can drive the supporting portion to move on the base ring 531 , and the movement of the supporting portion can push the supporting ring 520 and the rotating ring 510 to adjust the distance between the rotating ring 510 and the thrust plate 420 , and the rotating ring 510 can block the thrust plate 420 to limit the axial displacement of the main shaft 300 .

[0042] In general, before the slurry pump of this embodiment is used, the rotating ring 510 can be adjusted to a distance from the thrust plate 420 that is below a preset distance threshold, such as the maximum allowable axial displacement of the main shaft 300. When the actual displacement of the main shaft 300 is less than the distance between the rotating ring 510 and the thrust plate 420, the main shaft 300 can rotate without the rotating ring 510; when the displacement of the main shaft 300 reaches the distance between the rotating ring 510 and the thrust plate 420, the thrust plate 420 drives the rotating ring 510 to rotate, and the rotating ring 510 blocks the thrust plate 420 to prevent the displacement of the main shaft 300 from increasing again, thereby keeping the displacement of the main shaft 300 within the maximum allowable axial displacement. Compared with the solution of always abutting the rotating ring 510 against the thrust plate 420, the rotating ring 510 is set to be spaced a certain distance from the thrust plate 420 in advance in this embodiment, which can not only reduce the load of the main shaft 300 when it is not needed, but also reduce the wear of the rotating ring 510.

[0043] In terms of specific structure, in this embodiment, the support ring 520 can be slidably disposed on the base ring 531. Figure 4 As shown, a plurality of guide holes 501 are provided on the base ring 531, and guide posts 521 that can pass through the guide holes 501 one by one are provided on the support ring 520. Through the sliding of the guide posts 521 in the corresponding guide holes 501, the support ring 520 can only move relative to the base ring 531 along the axial direction of the main shaft 300, so that the distance between the support ring 520 and the base ring 531 can be adjusted.

[0044] In this embodiment, reference Figure 4 As shown, a limit plate 522 is provided on one end of the guide column 521 away from the thrust plate 420, and a first elastic member 523 is sleeved on each guide column 521, and the first elastic member 523 abuts between the base ring 531 and the limit plate 522. The first elastic member 523 applies a thrust to the limit plate 522, so that the support ring 520 moves in a direction in which the distance between the support ring 520 and the base ring 531 is reduced.

[0045] In this embodiment, the support portion can be adjusted to make the support ring 520 away from the base ring 531 and close to the thrust plate 420. By providing each first elastic member 523, after the support portion shortens the support for the support ring 520, the first elastic member 523 can push the support ring 520 close to the base ring 531. Thus, the distance between the support ring 520 and the base ring 531 can be adjusted in both directions.

[0046] In this embodiment, the first elastic member 523 is a spring. In some embodiments, the first elastic member 523 can also be a disc spring or other elastic member.

[0047] refer to Figure 4 As shown, the support ring 520 of this embodiment is provided with a plurality of spherical grooves on its end surface facing the thrust plate 420 , and a sphere 590 is installed in each spherical groove, and each sphere 590 protrudes from the end surface of the support ring 520 .

[0048] refer to Figure 4 and Figure 5 As shown, the rotating ring 510 of this embodiment includes a ring body 511 abutting against each ball 590, and an insertion shaft 512 fixedly connected to the ring body 511 and inserted into the inner hole of the support ring 520, and a bearing is installed between the insertion shaft 512 and the inner hole of the support ring 520. In this embodiment, by providing the above-mentioned balls 590 and making the rotating ring 510 abut against each ball 590, when the thrust plate 420 drives the rotating ring 510 to rotate, each ball 590 can provide axial support for the rotating ring 510, the thrust plate 420 and the main shaft 300, and reduce the friction between the rotating ring 510 and the support ring 520.

[0049] refer to Figures 3 to 5 As shown, the support portion of this embodiment includes a plurality of first wedge blocks 532, each of which is disposed on the base ring 531 and is evenly and spaced apart around the axis of the base ring 531, and can move on the base ring 531 along the radial direction of the base ring 531, and the end face of each first wedge block 532 facing the support ring 520 is a first wedge surface 5321; the support ring 520 is constructed with second wedge surfaces 524 that correspond to each first wedge surface 5321 one by one, and when each first wedge block 532 moves toward the center of the base ring 531, it can push the support ring 520 away from the base ring 531.

[0050] Based on the above structure, when each first wedge block 532 moves toward the center of the base ring 531, the radial movement of the first wedge block 532 along the main shaft 300 can be converted into an axial movement of the support ring 520 through the transmission of the first wedge surface 5321 and the second wedge surface 524, so that the support ring 520 is away from the base ring 531 and close to the thrust plate 420. When each first wedge block 532 moves toward the direction away from the center of the base ring 531, the first wedge block 532 will shorten the support for the support ring 520, and the first elastic member 523 can push the support ring 520 to approach the base ring 531.

[0051] refer to Figure 6 As shown, the adjustment portion 540 of this embodiment includes a center gear 541 which is coaxial with the main shaft 300 and rotatably disposed on the base ring 531, three racks 542 which are meshed with the center gear 541 and are circumferentially spaced and evenly distributed around the center gear 541, and a plurality of strip grooves 502 are provided on the end face of the rack 542 facing the support ring 520, and the strip grooves 502 are parallel and spaced apart, and are inclined relative to the length direction of the rack 542.

[0052] refer to Figure 6 As shown, a screw rod 560 and two guide rods 550 are provided on the base ring 531. The screw rod 560 is threadedly connected to one of the three racks 542. The other two of the three racks 542 are slidably sleeved on the corresponding guide rods 550, and the screw rod 560 has an extended section 561 extending out of the mounting seat 410. Three T-shaped slots 503 extending along the radial direction of the main shaft 300 are provided on the base ring 531. Each first wedge block 532 is slidably provided in each T-shaped slot 503 in a one-to-one correspondence, and a strip block 5322 that can be inserted into each strip slot 502 of the corresponding rack 542 is provided on the first wedge block 532.

[0053] Based on the above structure, when the screw rod 560 is rotated, the rack 542 threadedly connected to the screw rod 560 will move along the axial direction of the screw rod 560 and drive the central gear 541 to rotate, and the remaining two racks 542 will be driven by the central gear 541 and move along the axial direction of the corresponding guide rod 550. The movement of the three racks 542 can drive the first wedge block 532 to move in the T-slot 503 through the cooperation between the strip groove 502 and the strip block 5322. That is, rotating the screw rod 560 can simultaneously drive the three first wedge blocks 532 to move, thereby adjusting the distance between the rotating ring 510 and the carrier plate.

[0054] refer to Figure 7As shown, in this embodiment, a square mounting hole 402 is constructed on the mounting seat 410, the protruding section 561 passes through the mounting hole 402, and two opposite first planes 563 are constructed on the outer periphery of the protruding section 561; a stopper 570 is inserted into the mounting hole 402, the outer peripheral surface of the stopper 570 matches the inner wall surface of the mounting hole 402, and the inner wall surface of the stopper 570 has two second planes 571 respectively fitted with the two first planes 563.

[0055] Since the slurry pump vibrates during operation, the screw 560 may rotate unexpectedly due to the vibration, causing the distance between the mounting ring and the thrust plate 420 to change unexpectedly, thereby causing the support assembly 500 to lose its function. In this embodiment, by providing the above-mentioned stopper 570, due to the fit between the first plane 563 and the second plane 571, the stopper 570 will not rotate relative to the screw 560; when the stopper 570 is inserted into the mounting hole 402, the stopper 570 will not rotate relative to the mounting seat 410. At this time, the screw 560 will not rotate relative to the mounting seat 410, thereby preventing the screw 560 from rotating unexpectedly.

[0056] In this embodiment, reference Figure 7 and Figure 8 As shown, a rotation end 562 is constructed at the end of the extension section 561, and a first permanent magnet is fixedly arranged on the bottom surface of the rotation end 562, and a second permanent magnet 572 is fixedly arranged on the end surface of the stop member 570. After the stop member 570 is removed from the mounting hole 402, the first permanent magnet and the second permanent magnet 572 can be attracted to each other, so that the stop member 570 can rotate with the extension section 561. Since it does not affect understanding, the first permanent magnet is not shown in the drawings of this embodiment.

[0057] In this embodiment, by setting the above-mentioned first permanent magnet and second permanent magnet 572, after the anti-rotation member 570 escapes from the mounting hole 402, the anti-rotation member 570 can rotate along with the extending section 561 through the mutual adsorption of the first permanent magnet and the second permanent magnet 572, so that the staff can rotate the rotating end 562 to adjust the distance between the rotating ring 510 and the thrust plate 420.

[0058] In order to prevent the anti-rotation member 570 from coming out of the mounting hole 402 due to vibration, refer to Figure 7 and Figure 8 As shown, in this embodiment, two through holes are provided on the bearing end 562, and a stopper 580 is provided on the bearing end 562. The stopper 580 includes a base located above the bearing end 562, and a rod 581 provided on the base and capable of passing through the two through holes, the rod 581 being capable of abutting against the top end surface of the stopper 570, and second wedge blocks 582 are respectively provided on the two rods 581, and a second elastic member supporting the second wedge blocks 582 is provided on the base.

[0059] When the rod body 581 passes through the through hole, the side wall of the through hole can push the inclined surface of the second wedge block 582 to retract the second wedge block 582 into the rod body 581; after the second wedge block 582 passes through the through hole, the second wedge block 582 can be pushed by the second elastic member to protrude from the rod body 581 to prevent the rod body 581 from escaping from the through hole.

[0060] In this embodiment, after the position-limiting member 580 is installed on the rotating end 562, the two rods 581 of the position-limiting member 580 can abut against the anti-rotation member 570, thereby preventing the anti-rotation member 570 from falling out of the mounting hole 402 due to vibration, and the two second wedges 582 on the rod 581 can prevent the position-limiting member 580 from falling off the bearing end. When the screw rod 560 needs to be rotated, the two second wedges 582 can be pressed to remove the position-limiting member 580 from the rotating end 562, and then the anti-rotation member 570 can be removed from the mounting hole 402, and then the rotating end 562 can be rotated to rotate the screw rod 560.

[0061] refer to Figure 8 and Fig. 9 As shown, a small gear 610 is sleeved on the extended section 561, and a large gear 620 is rotatably provided on the mounting seat 410, and the large gear 620 is meshed with the small gear 610; an indicator disk 630 is coaxially fixed to the large gear 620, and a plurality of scale lines are provided on the disk surface of the indicator disk 630 along the circumference of the indicator disk 630, and an indicator member is provided on the mounting seat 410, and the indicator member has an indicator needle 640 that can be rotated to be opposite to one of the scale lines.

[0062] Since the rotation angle of the screw 560 is directly proportional to the moving distance of the rotating ring 510, and the rotation angle of the screw 560 is directly proportional to the rotation angle of the large gear 620; therefore, in this embodiment, by setting the above-mentioned large gear 620, small gear 610, indicator plate 630 and indicator member, the moving distance of the rotating ring 510 can be determined by the rotation angle of the indicator plate 630 relative to the indicator needle 640.

[0063] When adjusting the distance between the rotating ring 510 and the thrust plate 420, the indicator plate 630 may need to rotate several times. In order to facilitate the staff to record the number of times the indicator plate 630 has rotated, in this embodiment, reference is made to Figures 9 to 11 As shown, a pressure rod 621 is fixedly provided on the large gear 620, a push rod 411 is slidably provided on the mounting seat 410, and a ratchet 413 is rotatably provided, and a marking portion is provided on the mounting seat 410, a wedge-shaped tooth 412 is telescopically provided on the push rod 411, and numbers are engraved at intervals on the end surface of the ratchet 413.

[0064] Based on the above structure, every time the large gear 620 rotates one circle, the pressure rod 621 pushes the push rod 411 once, and the push rod 411 slides on the mounting seat 410 in the direction away from the large gear 620. During this process, the wedge teeth 412 on the push rod 411 will push the ratchet 413 to rotate a predetermined angle, so that the next number on the end face of the ratchet 413 is opposite to the marking part, indicating that the large gear 620 has rotated one circle.

[0065] After the pressure rod 621 is separated from the push rod 411, the push rod 411 is reset under the push of the third elastic member connected to it. During this process, since a damping sleeve is provided between the ratchet 413 and the mounting seat 410, the ratchet teeth on the ratchet 413 can push the wedge teeth 412 to retract into the push rod 411, so that the push rod 411 will not drive the ratchet 413 to rotate during the reset process.

[0066] In this embodiment, reference Figures 9 to 11 As shown, the above-mentioned marking part is a through hole 601 provided on the mounting base 410, and each number can correspond to the through hole 601 one by one for observation by the staff.

[0067] refer to Fig. 9 As shown, the indicator member of this embodiment also includes a mounting rod 650 fixed on the mounting seat 410 and coaxial with the large gear 620, the indicator needle 640 is rotatably arranged on the mounting rod 650, and a damping pad is provided between the mounting rod 650 and the indicator needle 640; the disc surface of the indicator disc 630 is constructed with a convex strip 631 extending radially along the indicator disc 630.

[0068] Based on the above structure, the overall process of the slurry pump of this embodiment is as follows:

[0069] Before starting the slurry pump:

[0070] The first step is to rotate the screw 560 in a direction to reduce the distance between the rotating ring 510 and the thrust plate 420 until the screw 560 can no longer be rotated. At this time, the distance between the rotating ring 510 and the thrust plate 420 is zero;

[0071] The second step, according to the predetermined distance between the rotating ring 510 and the thrust plate 420, calculates the angle at which the indicator plate 630 needs to rotate;

[0072] The third step is to rotate the indicator needle 640 so that the angle between it and the convex strip 631 is a predetermined angle; for example, the angle of rotation required for the indicator plate 630 is 2 turns plus 90 °, the indicator needle 640 is rotated to an angle of 90 ° between the convex strip 631;

[0073] The fourth step is to rotate the screw 560 in the direction of increasing the distance between the rotating ring 510 and the thrust plate 420, first rotate the indicator plate 630 a predetermined number of times, and then rotate the indicator plate 630 until the convex strip 631 is opposite to the indicator needle 640. At this time, the distance between the rotating ring 510 and the thrust plate 420 is a predetermined distance.

[0074] When the slurry pump is working:

[0075] If the displacement of the main shaft 300 is smaller than the distance between the rotating ring 510 and the thrust plate 420 , the main shaft 300 will not drive the rotating ring 510 to rotate;

[0076] When the displacement of the main shaft 300 reaches the distance between the rotating ring 510 and the thrust plate 420, the rotating ring 510 will block the main shaft 300 to prevent the displacement of the main shaft 300 from further increasing, thereby ensuring that the main shaft 300 is within the allowable axial displacement and ensuring the stability of the slurry pump operation.

[0077] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A slurry pump with an axial force balancing mechanism, comprising a bearing seat (200), a main shaft (300) and a pump housing (100), characterized in that: It also includes an axial balancing mechanism (400), and the axial balancing mechanism (400) includes: A mounting seat (410) is fixedly connected to the bearing seat (200); a mounting cavity (401) is provided in the mounting seat (410); and the main shaft (300) passes through the mounting cavity (401); A thrust plate (420) fixedly sleeved on the main shaft (300) and located in the installation cavity (401); A support assembly (500) comprising a support unit (530), a support ring (520) and a rotating ring (510); the support unit (530) comprising a base ring (531) fixedly arranged in the installation cavity (401), a support portion arranged on the base ring (531), and an adjustment portion (540) arranged on the base ring (531) and connected to the support portion; the support ring (520) is supported on the support portion, and the rotating ring (510) is rotatably arranged on the support ring (520); The adjusting portion (540) can drive the supporting portion to move on the base ring (531), and the movement of the supporting portion can push the supporting ring (520) and the rotating ring (510) to adjust the distance between the rotating ring (510) and the thrust plate (420), and the rotating ring (510) can block the thrust plate (420) to limit the axial displacement of the main shaft (300); The base ring (531) is provided with a plurality of guide holes (501), the support ring (520) is provided with guide posts (521) that pass through the guide holes (501) in a one-to-one correspondence, and the guide posts (521) are respectively provided with limit plates (522) at one end away from the support ring (520), and a first elastic member (523) is respectively provided between each limit plate (522) and the base ring (531), and the first elastic member (523) applies a thrust to the support ring (520) so that the support ring (520) approaches the base ring (531); The support portion comprises a plurality of first wedge blocks (532), each of which is arranged on the base ring (531) and is evenly and spaced apart around the axis of the base ring (531), and is capable of moving on the base ring (531) along the radial direction of the base ring (531); the end surface of each of the first wedge blocks (532) facing the support ring (520) is a first wedge surface (5321); the support ring (520) is provided with a second wedge surface (524) corresponding to each of the first wedge surfaces (5321) in a one-to-one manner, and when each of the first wedge blocks (532) moves toward the center of the base ring (531), it is capable of pushing the support ring (520) away from the base ring (531); The adjusting portion (540) comprises a central gear (541) coaxial with the main shaft (300) and rotatably arranged on the base ring (531), three racks (542) meshing with the central gear (541) and circumferentially spaced and evenly distributed around the central gear (541), a plurality of strip grooves (502) being arranged on the end surface of the rack (542) facing the support ring (520), each of the strip grooves (502) being parallel and spaced apart and inclined relative to the length direction of the rack (542); a screw rod (560) and two guide rods (550) being arranged on the base ring (531), the screw rod (560) being threadedly connected to one of the three racks (542), the other two of the three racks (542) being slidably sleeved on the corresponding guide rods (550), and the screw rod (560) having a protruding section (561) extending out of the mounting seat (410); The base ring (531) is provided with three T-slots (503) extending radially along the main shaft (300), and each of the first wedge blocks (532) is slidably arranged in each of the T-slots (503) in a one-to-one manner, and the first wedge blocks (532) are provided with strip blocks (5322) that can be inserted into each of the strip slots (502) of the corresponding rack (542); when the screw rod (560) rotates, each of the racks (542) moves and drives each of the first wedge blocks (532) to slide in the corresponding T-slot (503).

2. The slurry pump with an axial force balancing mechanism according to claim 1, characterized in that: The support ring (520) is provided with a plurality of spherical grooves on its end surface facing the thrust plate (420), each of the spherical grooves having a spherical body (590) installed therein, and each of the spherical bodies (590) protruding from the end surface of the support ring (520); the rotating ring (510) comprises a ring body (511) abutting against each of the spherical bodies (590), and an insertion shaft (512) fixedly connected to the ring body (511) and rotatably inserted into the inner hole of the support ring (520).

3. The slurry pump with an axial force balancing mechanism according to claim 1, characterized in that: The mounting seat (410) is provided with a square mounting hole (402), the extension section (561) passes through the mounting hole (402), and two opposite first planes (563) are provided on the outer periphery of the extension section (561); a stopper (570) is inserted into the mounting hole (402), the outer periphery of the stopper (570) is in contact with the inner wall of the mounting hole (402), and the inner wall of the stopper (570) has two second planes (571) respectively in contact with the two first planes (563).

4. The slurry pump with an axial force balancing mechanism according to claim 3, characterized in that: A square bearing end (562) is constructed at the end of the extending section (561), and two through holes are provided on the bearing end (562), and a limiting member (580) is provided on the bearing end (562), and the limiting member (580) includes a base located above the bearing end (562), and a rod body (581) provided on the base and passing through the two through holes, and the rod body (581) is in contact with the top end surface of the anti-rotation member (570); and second wedge blocks (582) are respectively provided on the two rod bodies (581), and second elastic members are provided on the base body, respectively abutting against the two second wedge blocks (582).

5. The slurry pump with an axial force balancing mechanism according to claim 1, characterized in that: A small gear (610) is sleeved on the extending section (561), and a large gear (620) is rotatably provided on the pump housing (100), and the large gear (620) is meshed with the small gear (610); an indicator disk (630) is coaxially fixedly connected to the large gear (620), and a plurality of scale lines are provided on the disk surface of the indicator disk (630) along the circumference of the indicator disk (630); an indicator member is provided on the mounting seat (410), and the indicator member has an indicator needle (640) that can be rotated to be opposite to one of the scale lines.

6. The slurry pump with an axial force balancing mechanism according to claim 5, characterized in that: A pressure rod (621) is fixedly provided on the large gear (620); a push rod (411) is slidably provided on the mounting seat (410), and a ratchet (413) is rotatably provided thereon, and a marking portion is provided on the mounting seat (410); a wedge-shaped tooth (412) is retractably provided on the push rod (411), and numbers are engraved at intervals on the end surface of the ratchet (413); the pressure rod (621) can periodically push the push rod (411) as the large gear (620) rotates, so that the wedge-shaped tooth (412) pushes the ratchet (413) to rotate a corresponding angle, so that the numbers on the ratchet (413) are aligned with the marking portion one by one.

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