Centrifugal pump body

Abstract

The utility model discloses a centrifugal pump body, which comprises a pump body, a rotating shaft is rotatably connected in the pump body, a mechanical seal is arranged on the outer side of the rotating shaft, the mechanical seal comprises a moving ring and a static ring, a cavity is arranged in the moving ring, and the static ring is arranged in the cavity. The inner wall of the cavity is provided with a plurality of sets of sealing plates, first sealing plugs and brushes which are vertically arranged at equal intervals, the outer side of the rotating shaft is provided with a plurality of sets of grooves at equal intervals, the free ends of the sealing plates, the free ends of the first sealing plugs and the free ends of the brushes are all clamped into the corresponding grooves, and the brushes make contact with the grooves. A first cavity and a second cavity are formed in the pump body. Through the design of the sealing plate, the sealing plug, the brush and the sealing gasket, particle impurities are blocked, the path of particle impurity airflow is prolonged, and meanwhile the particle impurities deposited in the groove are brushed off; and through the design of the through hole and the second sealing plug, the sealing performance of the movable ring can be guaranteed, and particle impurities can be conveniently discharged out of the movable ring.

Description

Technical Field

[0001] The utility model relates to the technical field of centrifugal pumps, and particularly relates to a centrifugal pump body. Background Technique

[0002] A centrifugal pump refers to a pump that transports liquids by the centrifugal force generated when the impeller rotates.

[0003] As a necessary part of the pump, the mechanical seal plays an indispensable role. When the centrifugal pump body transports liquids, due to the possible presence of particulate impurities in the liquid, the particulate impurities are likely to precipitate between the dynamic ring and the static ring and form mud covering the friction surfaces of the dynamic ring and the static ring. When the mechanical seal is in use, due to the blockage of the particulate impurities, no water enters the dynamic ring and the static ring. The friction between the dynamic ring and the static ring is dry friction. After long-term use, the dynamic ring and the static ring wear quickly, thus damaging the centrifugal pump body.

[0004] Therefore, we propose a centrifugal pump body. Summary of the Invention

[0005] The main purpose of the utility model is to provide a centrifugal pump body. Through the design of the sealing plate, the sealing plug, the brush and the sealing gasket, not only the particulate impurities are blocked, but also the path of the particulate impurity airflow is extended. At the same time, the particulate impurities deposited in the groove are brushed off; through the design of the through hole and the second sealing plug, the sealing performance of the dynamic ring can be ensured, and the particulate impurities can be conveniently discharged outside the dynamic ring, which can effectively solve the problems in the background technique.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0007] A centrifugal pump body includes a pump body. A rotating shaft is rotatably connected inside the pump body. A mechanical seal is arranged outside the rotating shaft. The mechanical seal includes a dynamic ring and a static ring. A cavity is arranged inside the dynamic ring. Multiple groups of equally spaced and vertically arranged sealing plates, first sealing plugs and brushes are arranged on the inner wall of the cavity.

[0008] Multiple groups of equally spaced grooves are arranged outside the rotating shaft. The free ends of the sealing plates, the first sealing plugs and the brushes are all clamped into the corresponding grooves, and the brushes are in contact with the grooves.

[0009] A first chamber and a second chamber are arranged inside the pump body. A screw hole is opened at one end of the second chamber. The rotating shaft is a horizontally arranged circular columnar structure. Multiple groups of the screw holes are arranged in a circular array with the center of the rotating shaft as the center. A threaded through hole for mating with a bolt connection is opened at one end of the static ring. One end of the bolt passes through the threaded through hole and is threadedly connected with the screw hole. Multiple groups of equally spaced annular sealing grooves are arranged on the inner wall of the static ring. Sealing gaskets are arranged in the annular sealing grooves.

[0010] Furthermore, a through hole is provided at the lower end of the stationary ring. The through hole is communicated with the cavity and is located between adjacent brushes.

[0011] Furthermore, the through hole is a conical shape with a larger upper part and a smaller lower part, and a second sealing plug is threadedly connected to the bottom of the lower end of the through hole.

[0012] Furthermore, an impeller is fixedly installed on the outer side of one end of the rotating shaft, and an impeller back cap is installed at one end of the impeller.

[0013] Furthermore, an impeller backplate gap is provided at one end of the impeller away from the impeller back cap, and an impeller stuffing box is provided on the outer side of one end of the impeller close to the impeller back cap.

[0014] Furthermore, an inlet is provided at one end of the first chamber, and an outlet is provided at the top of the first chamber.

[0015] Compared with the prior art, the present utility model has the following beneficial effects: Through the design of the sealing plate, sealing plug, brush and sealing gasket, not only the particulate impurities are blocked, but also the path of the particulate impurity airflow is extended, and at the same time, the particulate impurities deposited in the groove are brushed off; Through the design of the through hole and the second sealing plug, the sealing performance of the moving ring can be ensured, and it is convenient to discharge the particulate impurities outside the moving ring. Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a centrifugal pump body of the present utility model.

[0017] Figure 2 It is a centrifugal pump body of the present utility model Figure 1 Enlarged view at A in.

[0018] Figure 3 It is a centrifugal pump body of the present utility model Figure 2 Enlarged view at B in.

[0019] In the figure: 1. Pump body; 2. Rotating shaft; 3. Mechanical seal; 4. Moving ring; 5. Stationary ring; 6. Groove; 7. Sealing plate; 8. First sealing plug; 9. Brush; 10. Through hole; 11. Second sealing plug; 12. Annular sealing groove; 13. Sealing gasket; 14. Bolt; 15. Impeller; 16. Impeller backplate gap; 17. Impeller back cap; 18. Impeller stuffing box; 19. Inlet; 20. Outlet; 21. First chamber; 22. Second chamber. Detailed Embodiments

[0020] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0021] As Figure 1 ,Figure 2 , Figure 3 As shown in Figure 3 , a centrifugal pump body includes a pump body 1. A rotating shaft 2 is rotatably connected inside the pump body 1. A mechanical seal 3 is provided outside the rotating shaft 2. The mechanical seal 3 includes a dynamic ring 4 and a static ring 5. A cavity is provided inside the dynamic ring 4. On the inner wall of the cavity, multiple groups of equally spaced and vertically arranged sealing plates 7, first sealing plugs 8 and brushes 9 are provided respectively. Multiple groups of equally spaced grooves 6 are provided outside the rotating shaft 2. The free ends of the sealing plates 7, first sealing plugs 8 and brushes 9 are all clamped into the corresponding grooves 6, and the brushes 9 are in contact with the grooves 6.

[0022] A first chamber 21 and a second chamber 22 are provided inside the pump body 1. A screw hole is provided at one end of the second chamber 22. The rotating shaft 2 is a horizontally arranged circular columnar structure. Multiple groups of the screw holes are arranged in a circular array with the center of the rotating shaft 2 as the center. A threaded through hole for connecting with a bolt 14 is provided at one end of the static ring 5. One end of the bolt 14 passes through the threaded through hole and is threadedly connected with the screw hole. Multiple groups of equally spaced annular sealing grooves 12 are provided on the inner wall of the static ring 5, and sealing gaskets 13 are provided in the annular sealing grooves 12.

[0023] A through hole 10 is provided at the lower end of the static ring 5. The through hole 10 is communicated with the cavity and is located between adjacent brushes 9. The through hole 10 is a tapered shape with a larger upper part and a smaller lower part. A second sealing plug 11 is threadedly connected to the bottom of the lower end of the through hole 10. An impeller 15 is fixedly installed on the outer side of one end of the rotating shaft 2, and an impeller back cap 17 is installed at one end of the impeller 15.

[0024] An impeller backplate gap 16 is provided at the end of the impeller 15 away from the impeller back cap 17. An impeller mouth ring 18 is provided on the outer side of the end of the impeller 15 close to the impeller back cap 17. An inlet 19 is provided at one end of the first chamber 21, and an outlet 20 is provided at the top of the first chamber 21.

[0025] It should be noted that the present utility model is a centrifugal pump body. When in use, when the rotating shaft 2 rotates, it drives the impeller 15 to rotate. Under the action of centrifugal force, the liquid enters the first chamber 21 through the inlet 19 and is discharged from the outlet 20. If the particulate impurities in the liquid enter the dynamic ring 4, at this time, the sealing plates 7 and the sealing plugs 8 block the particulate impurities and extend the path of the particulate impurity airflow, and the brushes 9 can not only block the particulate impurities but also brush off the particulate impurities deposited in the grooves 6. Finally, by opening the second sealing plug 11, the particulate impurities can be discharged through the through hole 10. The sealing gaskets 13 in the annular sealing grooves 12 on the inner wall of the static ring 5 can also block the particulate impurities from entering the second chamber 22, thereby ensuring the sealing performance of the mechanical seal 3.

[0026] The foregoing has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above-mentioned embodiments, and what is described in the above-mentioned embodiments and the specification is only to illustrate the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will also have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A centrifugal pump body, comprising a pump body (1), characterized in that: A rotating shaft (2) is rotatably connected inside the pump body (1). A mechanical seal (3) is provided outside the rotating shaft (2). The mechanical seal (3) includes a moving ring (4) and a stationary ring (5). A cavity is provided inside the moving ring (4). A plurality of groups of equally spaced and vertically arranged sealing plates (7), first sealing plugs (8) and brushes (9) are provided on the inner wall of the cavity. A plurality of groups of equally spaced grooves (6) are provided outside the rotating shaft (2). The free ends of the sealing plates (7), first sealing plugs (8) and brushes (9) are all inserted into the corresponding grooves (6), and the brushes (9) are in contact with the grooves (6). A first chamber (21) and a second chamber (22) are provided inside the pump body (1). A screw hole is provided at one end of the second chamber (22). The rotating shaft (2) is a horizontally arranged circular columnar structure. A plurality of groups of the screw holes are arranged in a circular array with the center of the rotating shaft (2) as the center. A threaded through hole for connecting with a bolt (14) is provided at one end of the stationary ring (5). One end of the bolt (14) passes through the threaded through hole and is threadedly connected with the screw hole. A plurality of groups of equally spaced annular sealing grooves (12) are provided on the inner wall of the stationary ring (5), and sealing gaskets (13) are provided in the annular sealing grooves (12).

2. The centrifugal pump body according to claim 1, wherein: A through hole (10) is provided at the lower end of the stationary ring (5). The through hole (10) is communicated with the cavity and is located between adjacent brushes (9).

3. The centrifugal pump body according to claim 2, characterized in that: The through hole (10) is a tapered hole with a larger upper part and a smaller lower part. A second sealing plug (11) is threadedly connected to the bottom of the lower end of the through hole (10).

4. A centrifugal pump body according to claim 1, characterized in that: An impeller (15) is fixedly installed on the outer side of one end of the rotating shaft (2). An impeller back cap (17) is installed at one end of the impeller (15).

5. A centrifugal pump body according to claim 4, characterized in that: An impeller back plate gap (16) is provided at the end of the impeller (15) away from the impeller back cap (17). An impeller mouth ring (18) is provided on the outer side of the end of the impeller (15) close to the impeller back cap (17).

6. The centrifugal pump body according to claim 1, wherein: An inlet (19) is provided at one end of the first chamber (21). An outlet (20) is provided at the top of the first chamber (21).

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