Balance disc structure for adjusting axial clearance of vertical centrifugal pump set

Abstract

The utility model discloses a balance disc structure for adjusting the axial clearance of a vertical centrifugal pump set, which relates to the field of centrifugal pumps, and comprises a motor and a balance disc main body, the output end of the motor is connected with a pump shaft, and a locking component is arranged between the balance disc main body and the pump shaft. By arranging the locking assembly, when the balance disc body is arranged on a pump shaft in a sleeving mode and a locking column is aligned with a locking hole, a worker can rotate a rotating ring, so that the rotating ring moves downwards and drives a baffle ring to move downwards, and after the baffle ring moves downwards, due to the fact that the inner wall of the baffle ring and one side of an ejector block are arranged in an inclined plane mode, the baffle ring can push the ejector block to move towards the direction of a groove; and meanwhile, the ejector blocks drive the movable rods and the locking columns to move, the locking columns can stretch springs when moving, the balance disc body can be locked after the locking columns move into the locking holes, the balance disc body is prevented from moving freely, and the multiple locking columns can be rapidly moved into the locking holes to be locked in the mode.

Description

Technical Field

[0001] The utility model relates to the field of centrifugal pumps, in particular to a balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump group. Background Art

[0002] A centrifugal pump works by using the rotation of the impeller to cause water to move centrifugally. Before starting the pump, the pump casing and the suction pipe must be filled with water. Then the motor is started so that the pump shaft drives the impeller and water to rotate at high speed. The water moves centrifugally and is thrown to the outer edge of the impeller, flowing into the water pressure pipeline of the pump through the flow channel of the volute pump casing. The balance plate is a component structure of the centrifugal pump.

[0003] At present, the balancing disc structure commonly used in centrifugal pumps is usually composed of a balancing disc, a balancing seat and an adjustment sleeve. It has a complex structure, is difficult to process, and has an unobvious dynamic balancing effect. It cannot balance the axial force and adjust the axial clearance of the pump shaft. Therefore, it is necessary to design a balancing disc structure with a simple structure, easy processing, and the ability to adjust the axial clearance of the pump group. Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump group, so as to solve the technical problem that the existing balancing disc is difficult to balance the axial force and adjust the axial clearance of the pump shaft.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump group, comprising a motor and a balancing disc body, the output end of the motor being connected to the pump shaft, a locking assembly being provided between the balancing disc body and the pump shaft, the locking assembly comprising a plurality of locking holes provided on the outer wall of the pump shaft, a plurality of grooves provided above the outer wall of the balancing disc body and a rotating ring sleeved on the outer wall of the balancing disc body, a sealing plate being installed on one side of the groove, a spring being connected to one side of the sealing plate, and one end of the spring being connected to a locking column extending to the inside of the locking hole, a movable rod being installed on one end of the locking column extending to the outside of the sealing plate, and a top block being connected to one end of the movable rod.

[0006] By adopting the above technical solution, the locking column will stretch the spring when it moves, and after the locking column moves into the locking hole, the balancing disc body can be locked to prevent it from moving at will.

[0007] Furthermore, a retaining ring is installed at the bottom end of the rotating ring, and the diameter of the retaining ring is smaller than the diameter of the rotating ring.

[0008] By adopting the above technical solution, when the rotating ring moves downward, it will drive the retaining ring to move, and the retaining ring will push the top block to move in the direction of the groove, and cause the locking column to move.

[0009] Furthermore, the inner wall of the retaining ring and one side of the top block are both arranged in an inclined shape, and one side of the top block is in contact with the inner wall of the retaining ring.

[0010] By adopting the above technical solution, the retaining ring can block and limit the top block to prevent the top block from moving at will.

[0011] Furthermore, threads are provided on the inside of the rotating ring and the upper part of the outer wall of the balancing disc body, and the rotating ring is threadedly connected to the balancing disc body.

[0012] By adopting the above technical solution, when the staff rotates the swivel, the swivel will move and drive the retaining ring to move.

[0013] Furthermore, a sealing ring is provided between the movable rod and the sealing plate.

[0014] By adopting the above technical solution, the provision of the sealing ring can improve the sealing performance and prevent liquid from entering the interior of the groove through the gap between the sealing plate and the movable rod.

[0015] Furthermore, the plurality of locking holes are distributed in a ring array on the outer wall of the pump shaft, and the locking columns are adapted to the locking holes.

[0016] By adopting the above technical solution, when the locking column moves into the locking hole, the balancing disc body can be locked, so that the balancing disc body is firmly installed on the pump shaft.

[0017] Furthermore, the outer wall of the rotating ring is provided with anti-slip grooves.

[0018] By adopting the above technical solution, the anti-slip pattern makes it convenient for workers to rotate the swivel.

[0019] Furthermore, the locking column is slidably connected to the groove.

[0020] By adopting the above technical solution, the locking column can be moved into the groove and accommodated therein.

[0021] Furthermore, an impeller is installed at the bottom end of the pump shaft, and a mechanical seal is sleeved on the outer wall of the balancing disc body.

[0022] By adopting the above technical solution, the motor can drive the pump shaft to rotate when working, the pump shaft can drive the impeller to rotate, and the mechanical seal can play a sealing role.

[0023] In summary, the present invention has the following beneficial effects:

[0024] 1. After assembly, the balancing disc cooperates with the inner hole and end face of the mechanical seal and the outer circle of the pump shaft to balance the pressure difference on both sides of the impeller, playing the role of balancing the axial force and adjusting the axial clearance of the pump shaft. It can also effectively limit the axial displacement of the impeller and mechanical seal to ensure the efficiency of the centrifugal pump.

[0025] 2. The utility model is provided with a locking assembly. When the balancing disc body is sleeved on the pump shaft and the locking post is aligned with the locking hole, the staff can rotate the swivel to move the swivel downward and drive the retaining ring downward. After the retaining ring moves downward, since its inner wall and one side of the top block are both inclined, the retaining ring can push the top block to move in the direction of the groove. At the same time, the top block drives the movable rod and the locking post to move. When the locking post moves, it stretches the spring. When the locking post moves into the locking hole, the balancing disc body can be locked to prevent it from moving at will. In this way, multiple locking posts can be quickly moved into the locking holes for locking, without the need to use multiple screws for fixed installation, making the installation process simple and convenient, thereby improving the installation efficiency of the balancing disc body. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall front cross-sectional structure of the utility model;

[0027] Figure 2 This is a schematic diagram of the three-dimensional structure of the balancing disc main body of the utility model;

[0028] Figure 3 This is a bottom view of the structure of the balancing disc main body of the present invention;

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure of the pump shaft of the utility model;

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure of the swivel of the utility model;

[0031] Figure 6 For the utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0032] Figure 7 For the utility model Figure 5 Schematic diagram of the enlarged structure at point B in the middle.

[0033] In the figure: 1. Motor; 2. Pump shaft; 3. Balance plate body; 4. Impeller; 5. Mechanical seal; 6. Locking assembly; 601. Groove; 602. Locking column; 603. Locking hole; 604. Rotating ring; 605. Movable rod; 606. Spring; 607. Sealing plate; 608. Top block; 609. Retaining ring; 610. Sealing ring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] The following describes an embodiment of the present invention based on its overall structure.

[0036] Example 1:

[0037] A balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump group, such as Figure 1-Figure 7 As shown, it includes a motor 1 and a balancing disc body 3, the output end of the motor 1 is connected to the pump shaft 2, and a locking assembly 6 is provided between the balancing disc body 3 and the pump shaft 2. The locking assembly 6 includes a plurality of locking holes 603 provided on the outer wall of the pump shaft 2, a plurality of grooves 601 provided above the outer wall of the balancing disc body 3 and a swivel 604 sleeved on the outer wall of the balancing disc body 3, a sealing plate 607 is installed on one side of the groove 601, a spring 606 is connected to one side of the sealing plate 607, and one end of the spring 606 is connected to a locking column 602 extending into the locking hole 603. When the locking column 602 moves, it stretches the spring 606, and after the locking column 602 moves into the locking hole 603, the balancing disc body 3 can be locked to prevent it from moving at will.

[0038] See Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 One end of the locking column 602 is equipped with a movable rod 605 that passes through the outside of the sealing plate 607, and one end of the movable rod 605 is connected to a top block 608. A retaining ring 609 is installed at the bottom end of the swivel 604. The diameter of the retaining ring 609 is smaller than the diameter of the swivel 604. When the swivel 604 moves downward, it will drive the retaining ring 609 to move, and the retaining ring 609 will push the top block 608 to move toward the groove 601, and make the locking column 602 move. The inner wall of the retaining ring 609 and one side of the top block 608 are both inclined. One side of the top block 608 fits against the inner wall of the retaining ring 609. The retaining ring 609 can block and limit the top block 608 to prevent the top block 608 from moving at will.

[0039] See Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7, the interior of the swivel 604 and the upper part of the outer wall of the balancing disc body 3 are both provided with threads, and the swivel 604 is threadedly connected to the balancing disc body 3. When the staff rotates the swivel 604, the swivel 604 will move and drive the retaining ring 609 to move. A plurality of locking holes 603 are distributed in a circular array on the outer wall of the pump shaft 2. The locking column 602 is adapted to the locking hole 603. When the locking column 602 moves into the locking hole 603, the balancing disc body 3 can be locked, making the balancing disc body 3 stable. Installed on the pump shaft 2, the outer wall of the swivel 604 is provided with anti-slip grooves. The setting of the anti-slip grooves makes it convenient for the staff to rotate the swivel 604. The locking column 602 is slidably connected to the groove 601 so that the locking column 602 can be moved into the groove 601 and stored therein. The impeller 4 is installed at the bottom end of the pump shaft 2, and the outer wall of the balancing disk body 3 is sleeved with a mechanical seal 5. When the motor 1 is working, it can drive the pump shaft 2 to rotate, and the pump shaft 2 can drive the impeller 4 to rotate, and the mechanical seal 5 can play a sealing role.

[0040] Example 2:

[0041] On the basis of the above-mentioned embodiment 1, in order to improve the sealing performance between the movable rod 605 and the sealing plate 607, the following structure is provided.

[0042] See Figure 6 A sealing ring is provided between the movable rod 605 and the sealing plate 607 . The provision of the sealing ring can improve the sealing performance and prevent the liquid from entering the interior of the groove 601 through the gap between the sealing plate 607 and the movable rod 605 .

[0043] The working principle of the present invention is as follows: first, when the balancing disc body 3 is sleeved on the pump shaft 2 and the locking column 602 is aligned with the locking hole 603, the staff can rotate the swivel 604 to move the swivel 604 downward and drive the retaining ring 609 downward. After the retaining ring 609 moves downward, since its inner wall and one side of the top block 608 are both inclined, the retaining ring 609 can push the top block 608 to move in the direction of the groove 601. At the same time, the top block 608 drives the movable rod 605 and the locking column 602 to move. When the locking column 602 moves, it stretches the spring 606. When the locking column 602 moves into the locking hole 603, the balancing disc body 3 can be locked to prevent it from moving at will, thereby completing the installation of the balancing disc body 3.

[0044] After assembly, the balancing disc body 3 cooperates with the inner hole and end face of the mechanical seal 5 and the outer circle of the pump shaft 2, thereby balancing the pressure difference on both sides of the impeller 4, balancing the axial force, and effectively limiting the axial displacement of the impeller 4 and the mechanical seal 5.

[0045] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump assembly, comprising a motor (1) and a balancing disc body (3), characterized in that: The output end of the motor (1) is connected to the pump shaft (2), and a locking assembly (6) is provided between the balancing disc body (3) and the pump shaft (2). The locking assembly (6) includes a plurality of locking holes (603) provided on the outer wall of the pump shaft (2), a plurality of grooves (601) provided above the outer wall of the balancing disc body (3), and a rotating ring (604) sleeved on the outer wall of the balancing disc body (3). A sealing plate (607) is installed on one side of the groove (601), a spring (606) is connected to one side of the sealing plate (607), and one end of the spring (606) is connected to a locking column (602) extending into the interior of the locking hole (603), and one end of the locking column (602) is provided with a movable rod (605) extending through the outside of the sealing plate (607), and one end of the movable rod (605) is connected to a top block (608).

2. A balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: A retaining ring (609) is installed at the bottom end of the rotating ring (604), and the diameter of the retaining ring (609) is smaller than the diameter of the rotating ring (604).

3. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 2, characterized in that: The inner wall of the retaining ring (609) and one side of the top block (608) are both arranged in an inclined shape, and one side of the top block (608) is in contact with the inner wall of the retaining ring (609).

4. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: The interior of the rotating ring (604) and the upper portion of the outer wall of the balancing disc body (3) are both provided with threads, and the rotating ring (604) is threadedly connected to the balancing disc body (3).

5. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: A sealing ring is provided between the movable rod (605) and the sealing plate (607).

6. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: The plurality of locking holes (603) are distributed in an annular array on the outer wall of the pump shaft (2), and the locking columns (602) are adapted to the locking holes (603).

7. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: The outer wall of the rotating ring (604) is provided with anti-slip grooves.

8. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: The locking column (602) is slidably connected to the groove (601).

9. The balancing disc structure for adjusting the axial clearance of a vertical centrifugal pump unit according to claim 1, characterized in that: An impeller (4) is installed at the bottom end of the pump shaft (2), and a mechanical seal (5) is sleeved on the outer wall of the balancing disc body (3).

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