CN213144847U

CN213144847U - Novel thrust bearing structure of mining multistage centrifugal pump

Info

Publication number: CN213144847U
Application number: CN202021892372.7U
Authority: CN
Inventors: 张朋; 蒋仁杰
Original assignee: Jiangsu Changjiang Water Pump Co ltd
Current assignee: Jiangsu Changjiang Water Pump Co ltd
Priority date: 2020-09-02
Filing date: 2020-09-02
Publication date: 2021-05-07
Anticipated expiration: 2030-09-02

Abstract

The utility model relates to a novel thrust bearing structure of mining multistage centrifugal pump installs in the play water section of centrifugal pump, go out the water section lateral surface and install the back bearing subassembly that supports the pump shaft rear end, back bearing subassembly lateral surface is fixed with the rear end cap, and the rear end cap lateral surface is fixed with the thrust block, and the thrust block lateral surface is fixed with the gland, and the thrust block intracavity between gland and the thrust block inside wall slides and is equipped with the bearing frame, installs a pair of thrust bearing who supports in the pump shaft tail end in the bearing frame side by side, has the spring that two centrosymmetries set up between thrust block inner chamber inside wall and the bearing. The utility model discloses set up the thrust bearing in pump shaft tail end department, when receiving the remaining axial force of impeller effect, accessible thrust bearing bears this axial force, relies on the spring action to absorb axial force simultaneously and promotes the bearing frame and make axial displacement to this cooperation centrifugal pump balanced structure realizes the complete balance of impeller axial force, has improved the life of pump shaft support bearing, has ensured centrifugal pump moving stationarity.

Description

Novel thrust bearing structure of mining multistage centrifugal pump

Technical Field

The utility model belongs to the technical field of the centrifugal pump technique and specifically relates to a novel thrust bearing structure of mining multistage centrifugal pump.

Background

The multi-stage centrifugal pump has the problem that the bearing for supporting the pump shaft bears the same axial force due to the axial force of the impeller, so that the service life of the bearing is influenced. In order to reduce the axial force of the impeller, a balance mechanism is usually arranged in the multistage centrifugal pump, and the effect of automatically balancing the axial force of the impeller is achieved by utilizing the pressure difference between two ends of a balance disc or a balance drum. However, even if the axial force of the impeller cannot be completely balanced, part of the residual axial force still acts on the supporting bearing, so that the service performance of the bearing is reduced, and the running stability of the centrifugal pump is influenced.

Disclosure of Invention

The to-be-solved technical problem of the utility model is: in order to overcome the deficiencies in the prior art, the utility model provides a can balance the remaining axial force of impeller, improve the novel thrust bearing structure of mining multistage centrifugal pump of operation stationarity.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a novel thrust bearing structure of mining multistage centrifugal pump, installs in the play water section of centrifugal pump, it installs the back bearing subassembly that supports the pump shaft rear end to go out water section lateral surface, back bearing subassembly lateral surface be fixed with the rear end cap, the rear end cap lateral surface is fixed with the thrust block, the thrust block lateral surface is fixed with the gland, it is equipped with the bearing frame to slide in the thrust block inner chamber between gland and the thrust block inside wall, install a pair of thrust bearing that supports in the pump shaft tail end in the bearing frame side by side, the spring that has two centrosymmetries and set up between thrust block inner chamber inside wall and the bearing.

Specifically, the inner side wall of the thrust block is provided with two blind holes with centrosymmetry, one end of the spring is in contact with the bottom surface of the blind hole, and the other end of the spring is propped against the inner side surface of the bearing block.

Furthermore, the outer peripheral surface of the bearing seat is provided with an axial guide groove, and the outer peripheral wall of the thrust block is connected with a guide bolt with the bottom end positioned in the axial guide groove.

The utility model has the advantages that: the utility model discloses set up the thrust bearing in pump shaft tail end department, when receiving the remaining axial force of impeller effect, accessible thrust bearing bears this axial force, relies on the spring action to absorb axial force simultaneously and promotes the bearing frame and make axial displacement to this cooperation centrifugal pump balanced structure realizes the complete balance of impeller axial force, is favorable to improving the life of pump shaft support bearing, has ensured centrifugal pump moving stationarity.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. the water pump comprises a water outlet section, a pump shaft 2, a rear bearing assembly 3, a rear end cover 4, a thrust block 5, a gland 6, a bearing seat 7, a thrust bearing 8, a spring 9, a blind hole 10, an axial guide groove 11, a guide bolt 12, a water outlet pump cover 13 and a water seal pipe assembly 14.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.

The novel thrust bearing structure of the mining multistage centrifugal pump shown in fig. 1 is installed on a water outlet section 1 of the centrifugal pump, a rear bearing assembly 3 supporting the rear end of a pump shaft 2 is installed on the outer side surface of the water outlet section 1 through a water outlet pump cover 13, a rear end cover 4 is fixed on the outer side surface of the rear bearing assembly 3, and a water seal pipe assembly 14 is installed in the water outlet pump cover.

A thrust block 5 is fixed on the outer side surface of the rear end cover 4, and a gland 6 is fixed on the outer side surface of the thrust block 5. The thrust block have an inner chamber, the 5 inside walls of thrust block have two centrosymmetric

blind holes

10, 5 intracavity of thrust block are equipped with 5 inner chamber wall clearance fit's of thrust block bearing frame 7,

gland

6 and 7 lateral surfaces clearance fit of bearing frame.

A pair of thrust bearings 8 supported at the tail end of the pump shaft 2 are arranged in the bearing seat 7 side by side, a retainer ring for clamping a hole of the outer ring of the thrust bearing 8 is arranged in the inner cavity of the bearing seat 7, and two locking nuts for locking the inner rings of the thrust bearings 8 are connected to the tail end of the pump shaft 2.

Two springs 9 which are arranged in central symmetry are arranged between the inner side wall of the inner cavity of the thrust block 5 and the bearing block 7. One end of the spring 9 is contacted with the bottom surface of the blind hole 10, and the other end of the spring 9 is pressed against the inner side surface of the bearing seat 7.

The outer peripheral surface of the bearing seat 7 is provided with an axial guide groove 11, and the outer peripheral wall of the thrust block 5 is connected with a guide bolt 12 with the bottom end positioned in the axial guide groove 11.

The utility model discloses set up thrust bearing 5 in 2 tail end departments of pump shaft, when receiving the remaining axial force of impeller effect, accessible thrust bearing 8 bears this axial force, relies on the 9 effects of spring to absorb axial force simultaneously and promotes bearing frame 7 and make axial displacement to this cooperation centrifugal pump balanced structure realizes the complete balance of impeller axial force, is favorable to improving the life of 2 bearing supports of pump shaft, has ensured centrifugal pump moving stationarity.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a novel thrust bearing structure of mining multistage centrifugal pump installs in play water section (1) of centrifugal pump, go out water section (1) lateral surface and install back bearing subassembly (3) that support pump shaft (2) rear end, characterized by: rear bearing subassembly (3) lateral surface be fixed with rear end cap (4), rear end cap (4) lateral surface is fixed with thrust block (5), thrust block (5) lateral surface is fixed with gland (6), it is equipped with bearing frame (7) to slide in thrust block (5) inner chamber between gland (6) and thrust block (5) inside wall, install a pair of thrust bearing (8) that support in pump shaft (2) tail end in bearing frame (7) side by side, spring (9) that two centrosymmetries set up have between thrust block (5) inner chamber inside wall and bearing frame (7).

2. The novel thrust bearing structure of the mining multistage centrifugal pump as claimed in claim 1, characterized in that: the inner side wall of the thrust block (5) is provided with two blind holes (10) with centrosymmetry, one end of the spring (9) is in contact with the bottom surface of the blind hole (10), and the other end of the spring (9) is pressed against the inner side surface of the bearing seat (7).

3. The novel thrust bearing structure of the mining multistage centrifugal pump as claimed in claim 1, characterized in that: the bearing frame (7) periphery have axial guide slot (11), thrust block (5) periphery wall be connected with bottom and be located axial guide slot (11) in guide bolt (12).