CN219953678U - Shell sealing structure of brushless diesel pump - Google Patents

Abstract

The utility model discloses a shell sealing structure of a brushless diesel pump in the technical field of pump sealing, which comprises a bottom plate and a pump shell, wherein the pump shell is fixedly connected with a motor through a right flange, an oil inlet is formed in the left side of the pump shell, an oil outlet is formed in the top end of the pump shell, an impeller is fixedly connected to the left end of a main shaft, a movable ring is rotatably connected to the position, close to the impeller, of the main shaft, a static ring is arranged on the right side of the movable ring, a conical sealing ring is rotatably connected to the position, close to the impeller, of the main shaft, a cavity is formed in the position, close to the impeller, of the oil inlet, a fixed block is fixedly connected to the inside of the cavity through a fixed bolt, a spring is fixedly connected to the fixed block, a driving bolt is fixedly connected to the upper end of the rotary sealing ring, and a movable ring O-shaped sealing ring is arranged at the bottom end of the rotary sealing ring, and the utility model has the following advantages: the mechanical sealing structure is additionally arranged at the oil inlet, so that the oil inlet can be sealed, and pressure difference formed by rotation of the impeller at the oil inlet can be prevented, and oil backflow or leakage can be avoided.

Description

Shell sealing structure of brushless diesel pump

Technical Field

The utility model relates to the technical field of pump sealing, in particular to a shell sealing structure of a brushless diesel pump.

Background

The shaft is a friction seal or stuffing box to prevent leakage of liquid between the shaft and bearings of the compressor or other fluid delivery device, and is also a sealing device provided to prevent leakage at the pump shaft and housing. Because of the sealing performance requirement, if no sealing device is arranged between the pump housing and the shaft in running, the medium directly flows out from the position, if the medium is a toxic and harmful medium, the safety problem exists, and when no special requirement exists, the filler seal is used at the position, so that the cost is low; if the requirements of working conditions are high, mechanical sealing is needed, a matched flushing scheme is adopted to realize good sealing performance, and meanwhile, the mechanical sealing has good service life and is not realized by the filler.

At present, the existing brushless diesel pump is sealed by adopting a mechanical sealing mode with better sealing performance according to working condition requirements, but the existing brushless diesel pump is singly sealed by adopting a mechanical sealing mode, and the oil inlet is subjected to larger pressure difference due to the impeller, so that the pressure of the oil is higher, and the oil leakage or backflow is easy to occur at the oil inlet. Accordingly, a person skilled in the art provides a housing sealing structure of a brushless diesel pump to solve the above-mentioned problems in the related art.

Disclosure of Invention

The utility model aims to provide a shell sealing structure of a brushless diesel pump, which aims to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a brushless diesel pump's shell seal structure, includes bottom plate and pump case, the pump case is through right side flange fixed connection in the motor, the pump case is through pillar fixed connection in the bottom plate, the oil inlet has been seted up in the left side of pump case, the oil-out has been seted up on the top of pump case, the cavity has been seted up to the inside cavity, and the internal rotation of cavity is connected with the main shaft, the left end fixedly connected with impeller of main shaft, the position that the main shaft is close to the impeller rotates and is connected with the rotating ring, the right side of rotating ring is provided with quiet ring, fixedly connected with anti-rotation nut and lock nut on the impeller, the outside of impeller is provided with the impeller shell, the main shaft is close to the right side position rotation of impeller and is connected with the toper sealing washer, the toper sealing washer is fixed in the pump case cavity through O type ring cushion, the bottom fixedly connected with main shaft pin cap, the cavity is close to the position of impeller, the fixedly connected with dead bolt fixed block on the fixed block, the other end fixedly connected with spring in rotatory sealing ring, the upper end fixedly connected with drive ring, rotatory sealing ring is provided with the static ring, the dead bolt setting up on the rotating ring, O type seal ring is provided with the dead bolt, O type seal ring is in the setting up on the dead bolt.

As a further scheme of the utility model: the main shaft is fixedly connected to a driving shaft of the motor through the main shaft splicing cap, and the motor is fixedly connected to the bottom plate through the mounting frame.

As still further aspects of the utility model: the impeller shell is fixedly connected to the inner cavity of the pump shell, the impeller is arranged in the impeller shell, and a gap is reserved between the impeller and the impeller shell.

As still further aspects of the utility model: the main shaft is provided with a key slot at the position close to the movable ring, and the outside of the main shaft is fixedly connected with a shaft sleeve through the key slot.

As still further aspects of the utility model: the oil outlet is internally provided with a backflow preventing device.

As still further aspects of the utility model: the driving bolt is rotationally connected to the bolt seat in a clamping manner.

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

1. according to the utility model, the mechanical sealing structure with the built-in spring is added at the oil inlet, so that the oil inlet can be sealed, the strong pressure difference formed by rotation of the impeller at the oil inlet can be prevented, the oil backflow or leakage and other conditions can be caused, and the overall sealing performance of the pump casing can be enhanced.

2. According to the utility model, the static ring and the dynamic ring are added on the main shaft to mechanically seal the main shaft, so that oil liquid is prevented from entering the main shaft, and the rotation efficiency of the main shaft is influenced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a front view of the present utility model;

FIG. 3 is a cross-sectional view of the present utility model;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3 in accordance with the present utility model;

fig. 5 is an enlarged schematic view of the portion B of fig. 3 in the present utility model.

In the figure: 1. a bottom plate; 2. a mounting frame; 3. a motor; 4. a flange; 5. an oil outlet; 6. a pump housing; 7. an oil inlet; 8. a main shaft; 9. a shaft sleeve; 10. a conical sealing ring; 11. an O-ring cushion block; 12. an impeller housing; 13. an impeller; 14. an anti-rotation nut; 15. a lock nut; 16. a main shaft cap assembly; 17. a moving ring; 18. a key slot; 19. a stationary ring; 20. a fixing bolt; 21. a spring; 22. rotating the seal ring; 23. a drive bolt; 24. a static ring O-ring seal; 25. a bolt seat; 26. a stationary ring; 27. and a movable ring O-shaped sealing ring.

Description of the embodiments

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-5, in the embodiment of the utility model, a shell sealing structure of a brushless diesel pump comprises a bottom plate 1 and a pump shell 6, the pump shell 6 is fixedly connected with a motor 3 through a right flange 4, the pump shell 6 is fixedly connected with the bottom plate 1 through a support column, an oil inlet 7 is formed in the left side of the pump shell 6, an oil outlet 5 is formed in the top end of the pump shell 6, a cavity is formed in the pump shell 6, a main shaft 8 is rotationally connected with the cavity, the left end of the main shaft 8 is fixedly connected with an impeller 13, a position of the main shaft 8 close to the impeller 13 is rotationally connected with a movable ring 17, a static ring 19 is arranged on the right side of the movable ring 17, an anti-rotation nut 14 and a locking nut 15 are fixedly connected on the impeller 13, a conical sealing ring 10 is rotationally connected with the right side of the main shaft 8 close to the impeller 13, the conical sealing ring 10 is fixedly connected with a cavity of the pump shell 6 through an O-ring cushion block 11, a main shaft splicing cap 16 is fixedly connected with the bottom end of the main shaft 8, a cavity is formed in the cavity, a fixed block is rotationally connected with the cavity through a fixed bolt 20, the other end of the fixed block 21 is fixedly connected with an impeller 13, a rotary sealing ring 22 is rotationally connected with a static ring 22, a driving seal ring 24 is rotationally connected with a static ring 24, a driving seal ring 24 is rotationally arranged on the left sealing ring 24 is fixedly connected with a sealing ring 24, and a driving seal ring 24 is rotationally connected with a sealing ring 24, and a driving ring 24 is fixedly connected with a sealing ring 23.

Wherein, the main shaft 8 is fixedly connected with the driving shaft of the motor 3 through the main shaft splicing cap 16, and the motor 3 is fixedly connected with the bottom plate 1 through the mounting frame 2; the impeller shell 12 is fixedly connected with the inner cavity of the pump shell 6, the impeller 13 is arranged in the impeller shell 12, and a gap is reserved between the impeller 13 and the impeller shell 12; a key groove 18 is formed in the position, close to the movable ring 17, of the main shaft 8, and the shaft sleeve 9 is fixedly connected to the outer part of the main shaft 8 through the key groove 18; a backflow preventing device is arranged in the oil outlet 5; the driving bolt 23 is rotatably connected to the bolt seat 25 in a clamping manner.

The working principle of the utility model is as follows: when the oil pump is used, the pump shell 6 is fixedly connected to the motor 3 through the right flange 4, the pump shell 6 is fixedly connected to the bottom plate 1 through the support column, the left side of the pump shell 6 is provided with the oil inlet 7, the top end of the pump shell 6 is provided with the oil outlet 5, the inside of the pump shell 6 is provided with the cavity, the cavity is rotationally connected with the main shaft 8, the left end of the main shaft 8 is fixedly connected with the impeller 13, the position of the main shaft 8, which is close to the impeller 13, is rotationally connected with the movable ring 17, the right side of the movable ring 17 is provided with the stationary ring 19, when the main shaft 8 starts to rotate under the driving of the motor 3, the main shaft 8 drives the impeller 13 to rotate, pressure difference is generated in the oil suction cavity, the movable ring 17 rotates along with the rotation of the main shaft 8, the oil is prevented from entering, and the oil inlet 7 is prevented from leaking or flowing backwards through the stationary ring O-shaped sealing ring 24.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims (6)

1. The utility model provides a brushless diesel pump's shell seal structure, includes bottom plate (1) and pump case (6), its characterized in that: the utility model discloses a pump casing (6) is fixed connection in motor (3) through right side flange (4), pump casing (6) is fixed connection in bottom plate (1) through the pillar, oil inlet (7) have been seted up in the left side of pump casing (6), oil-out (5) have been seted up on the top of pump casing (6), cavity internal portion has been seted up, and cavity internal rotation is connected with main shaft (8), the left end fixedly connected with impeller (13) of main shaft (8), the position rotation that main shaft (8) are close to impeller (13) is connected with rotating ring (17), the right side of rotating ring (17) is provided with quiet ring (19), fixedly connected with anti-rotation nut (14) and lock nut (15) on impeller (13), the outside of impeller (13) is provided with impeller shell (12), the right side position rotation that main shaft (8) are close to impeller (13) is connected with conical seal ring (10), conical seal ring (10) are fixed in the cavity of main shaft (6) through O type circle cushion (11), the bottom of main shaft (8) is close to impeller (13) is connected with rotating ring (16), the fixed connection has fixed block (20) through the inside of piecing together fixed block (21), the other end fixed connection of spring (21) is in rotatory sealing ring (22), the upper end fixedly connected with drive bolt (23) of rotatory sealing ring (22), rotatory sealing ring (22) bottom is provided with rotating ring O type sealing washer (27), rotating ring O type sealing washer (27) correspond and are provided with quiet ring O type sealing washer (24), quiet ring O type sealing washer (24) set up on quiet ring (26), the left side of quiet ring O type sealing washer (24) is provided with drive bolt (23), drive bolt (23) are fixed in on bolt seat (25).

2. The housing seal arrangement of a brushless diesel pump as claimed in claim 1, wherein: the main shaft (8) is fixedly connected to a driving shaft of the motor (3) through a main shaft splicing cap (16), and the motor (3) is fixedly connected to the bottom plate (1) through the mounting frame (2).

3. The housing seal arrangement of a brushless diesel pump as claimed in claim 1, wherein: the impeller shell (12) is fixedly connected to the inner cavity of the pump shell (6), the impeller (13) is arranged in the impeller shell (12), and a gap is reserved between the impeller (13) and the impeller shell (12).

4. The housing seal arrangement of a brushless diesel pump as claimed in claim 1, wherein: the main shaft (8) is provided with a key slot (18) at a position close to the movable ring (17), and the outer part of the main shaft (8) is fixedly connected with a shaft sleeve (9) through the key slot (18).

5. The housing seal arrangement of a brushless diesel pump as claimed in claim 1, wherein: the oil outlet (5) is internally provided with a backflow preventing device.

6. The housing seal arrangement of a brushless diesel pump as claimed in claim 1, wherein: the driving bolt (23) is rotatably connected to the bolt seat (25) in a clamping manner.