CN212899111U - Leakage-proof sealing structure of centrifugal pump - Google Patents

Abstract

The utility model belongs to the technical field of centrifugal pumps, in particular to a leakage-proof sealing structure of a centrifugal pump, which comprises a shell, a pump shaft, a static ring, a movable ring, a spring and a transmission ring; the shell is of a hollow structure, and a pump cover is fixed at one end of the shell; the pump shaft is arranged in the shell, one end of the pump shaft is rotatably embedded in the pump cover, and the other end of the pump shaft extends to the outside of the shell; the static ring, the movable ring, the spring and the transmission ring are all nested on the outer wall of the pump shaft, the static ring is fixedly connected with the pump cover, and a static ring sealing ring is arranged between the static ring and the pump cover; the movable ring and the static ring are clamped, and a movable ring sealing ring is arranged between the movable ring and the static ring; the spring is fixedly connected between the movable ring and the transmission ring, one side of the transmission ring is fixedly connected with a push rod, one end of the push rod extends to the outside of the shell, a fixed plate is nested in the push rod, and the fixed plate is fixedly connected with the shell through a first fixed bolt; the utility model discloses guarantee the leakproofness between pump cover and the pump shaft, can effectively prevent the leakage of liquid in the casing.

Description

Leakage-proof sealing structure of centrifugal pump

Technical Field

The utility model relates to a centrifugal pump technical field specifically is a centrifugal pump leak protection seal structure.

Background

The centrifugal pump has various forms such as vertical type, horizontal type, single stage, multistage, single suction, double suction, self suction and the like. Centrifugal pumps operate by causing water to move centrifugally as a result of the rotation of an impeller. Before the water pump is started, the pump shell and the water suction pipe are filled with water, then the motor is started, the pump shaft drives the impeller and the water to rotate at a high speed, the water is thrown to the outer edge of the impeller to be thrown into a water pressure pipeline of the water pump through a flow channel of the volute-shaped pump shell.

However, the existing centrifugal pump has the defects of poor structural reasonability and insufficient sealing performance, and in the operation process of the centrifugal pump, liquid can flow out of the shell through a gap between the pump cover and the pump shaft to influence the operation of other parts of the centrifugal pump.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a centrifugal pump leak protection seal structure to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a centrifugal pump leak-proof sealing structure comprises a shell, a pump shaft, a static ring, a dynamic ring, a spring and a transmission ring; the shell is of a hollow structure, and a pump cover is fixed at one end of the shell; the pump shaft is arranged in the shell, one end of the pump shaft is rotatably embedded in the pump cover, and the other end of the pump shaft extends to the outside of the shell; the static ring, the movable ring, the spring and the transmission ring are all nested on the outer wall of the pump shaft, the static ring is fixedly connected with the pump cover, and a static ring sealing ring is arranged between the static ring and the pump cover; the movable ring and the static ring are clamped, and a movable ring sealing ring is arranged between the movable ring and the static ring; spring fixed connection is between rotating ring and driving ring, and one side rigid coupling that the pump cover was kept away from to the driving ring has the push rod, and the one end that the driving ring was kept away from to the push rod extends to the outside of casing and inside nested has the fixed plate, through a fixing bolt fixed connection between fixed plate and the casing.

Preferably, the pump cover is fastened to the housing by a second fixing bolt.

Preferably, the push rod is uniformly provided with nesting holes for nesting the fixing plate.

Preferably, the fixing plate and the shell are provided with through holes along the axial direction, the two through holes are communicated, and the first fixing bolt is embedded into the through holes after the communication.

Preferably, the shell is provided with a through hole for extending the push rod, and the through hole is connected with the push rod in a embedding manner.

Compared with the prior art, the beneficial effects of the utility model are that:

when the leak-proof sealing structure of the centrifugal pump seals a gap between a pump cover and a pump shaft of the centrifugal pump, the driving ring pushes the spring to extrude the movable ring under the action of the push rod, and the movable ring extrudes the movable ring sealing ring and applies pressure to the static ring, so that the movable ring and the static ring are in closer contact, and liquid can be prevented from flowing out of the shell from the static ring and the pump shaft; the utility model provides a centrifugal pump leak protection seal structure uses after a period, and the elasticity of spring descends, through changing the nested position of fixed plate on the push rod, and then can change the distance between transmission ring and the rotating ring to can adjust the compression capacity of spring, and then can adjust the elasticity of spring, guarantee the leakproofness between pump cover and the pump shaft.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is an enlarged schematic structural diagram of a position a of the present invention.

In the figure: 1. a housing; 2. a pump cover; 3. a pump shaft; 4. a stationary ring; 5. a moving ring; 6. a spring; 7. a drive ring; 8. a stationary ring seal ring; 9. a moving ring sealing ring; 10. a push rod; 11. a fixing plate; 12. a first fixing bolt; 13. a second fixing bolt; 14. embedding a sleeve hole; 15. and (6) perforating.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-2, the present invention provides a technical solution: a centrifugal pump leak-proof sealing structure comprises a shell 1, a pump shaft 3, a static ring 4, a dynamic ring 5, a spring 6 and a transmission ring 7; the shell 1 is of a hollow structure, and one end of the shell 1 is fixed with a pump cover 2; the pump shaft 3 is arranged in the shell 1, one end of the pump shaft 3 is rotatably embedded in the pump cover 2, and the other end of the pump shaft 3 extends to the outside of the shell 1; the static ring 4, the dynamic ring 5, the spring 6 and the transmission ring 7 are all nested on the outer wall of the pump shaft 3, the static ring 4 is fixedly connected with the pump cover 2, and a static ring sealing ring 8 is arranged between the static ring 4 and the pump cover 2; the movable ring 5 and the static ring 4 are clamped, and a movable ring sealing ring 9 is arranged between the movable ring 5 and the static ring 4; spring 6 fixed connection is between rotating ring 5 and driving ring 7, and one side rigid coupling that pump cover 2 was kept away from to driving ring 7 has push rod 10, and the one end that driving ring 7 was kept away from to push rod 10 extends to the outside of casing 1 and inside nested fixed plate 11, through first fixing bolt 12 fixed connection between fixed plate 11 and the casing 1.

Further, the pump cover 2 is fastened to the housing 1 by a second fixing bolt 13.

Further, the push rod 10 is uniformly provided with nesting holes 14 for nesting the fixing plate 11.

Further, all seted up the through-hole along axial direction on fixed plate 11 and the casing 1, two through-holes intercommunication settings, first fixing bolt 12 imbeds in the through-hole after the intercommunication.

Furthermore, a through hole 15 for extending the push rod 10 is formed in the housing 1, and the through hole 15 is connected with the push rod 10 in a fitting manner.

The working principle is as follows: when the leak-proof sealing structure of the centrifugal pump seals a gap between the pump cover 2 and the pump shaft 3 of the centrifugal pump, the driving ring 7 pushes the movable ring 5 by the fixed spring 6 under the action of the push rod 10, and the movable ring 5 pushes the movable ring sealing ring 9 and applies pressure to the static ring 4, so that the movable ring 5 is in closer contact with the static ring 4, and liquid can be prevented from flowing out of the shell 1 from the static ring 4 and the pump shaft 3; the utility model provides a centrifugal pump leak protection seal structure uses after a period, and spring 6's elasticity descends, through changing the nested position of fixed plate 11 on push rod 10, and then can change the distance between transmission ring 7 and the rotating ring 5 to can adjust spring 6's decrement, and then can adjust spring 6's elasticity, guarantee the leakproofness between pump cover 2 and the pump shaft 3.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. A centrifugal pump leakage-proof sealing structure is characterized by comprising a shell (1), a pump shaft (3), a static ring (4), a dynamic ring (5), a spring (6) and a transmission ring (7); the shell (1) is of a hollow structure, and a pump cover (2) is fixed at one end of the shell (1); the pump shaft (3) is arranged in the shell (1), one end of the pump shaft (3) is rotatably embedded in the pump cover (2), and the other end of the pump shaft (3) extends to the outside of the shell (1); the static ring (4), the dynamic ring (5), the spring (6) and the transmission ring (7) are all nested on the outer wall of the pump shaft (3), the static ring (4) is fixedly connected with the pump cover (2), and a static ring sealing ring (8) is arranged between the static ring (4) and the pump cover (2); the movable ring (5) is clamped with the static ring (4), and a movable ring sealing ring (9) is arranged between the movable ring (5) and the static ring (4); spring (6) fixed connection is between rotating ring (5) and driving ring (7), and one side rigid coupling that pump cover (2) were kept away from in driving ring (7) has push rod (10), and the one end that driving ring (7) were kept away from in push rod (10) extends to the outside of casing (1) and inside nested fixed plate (11), through first fixing bolt (12) fixed connection between fixed plate (11) and casing (1).

2. A centrifugal pump leak-proof sealing structure according to claim 1, characterized in that: the pump cover (2) is fastened on the shell (1) through a second fixing bolt (13).

3. A centrifugal pump leak-proof sealing structure according to claim 1, characterized in that: nesting holes (14) for nesting the fixing plate (11) are uniformly formed in the push rod (10).

4. A centrifugal pump leak-proof sealing structure according to claim 1, characterized in that: through-holes are formed in the fixing plate (11) and the shell (1) along the axial direction, the two through-holes are communicated, and the first fixing bolt (12) is embedded into the through-holes after communication.

5. A centrifugal pump leak-proof sealing structure according to claim 1, characterized in that: the shell (1) is provided with a through hole (15) for extending the push rod (10), and the through hole (15) is connected with the push rod (10) in a embedding manner.

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