CN215860934U

CN215860934U - Balanced high-efficient multistage pump of shaft seal

Info

Publication number: CN215860934U
Application number: CN202120322190.4U
Authority: CN
Inventors: 聂雄杰; 李小勇; 伍建新
Original assignee: Hunan Bock Fluid Technology Co ltd
Current assignee: Hunan Bock Fluid Technology Co ltd
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2022-02-18
Anticipated expiration: 2031-02-04

Abstract

The utility model relates to the field of multistage pump shaft seal balance, in particular to a shaft seal balance efficient multistage pump, which comprises a shaft and an axial force device mechanical seal, wherein the left end of the outer side of the shaft is rotatably connected with a bearing body A, the outer side of the bearing body A is fixedly connected with a shell, the inner side of the shell is fixedly connected with a middle section, the left end of the inner side of the middle section is fixedly connected with a mechanical seal, and the mechanical seal is rotatably connected with the shaft, the device has few parts, high universality, safety and reliability.

Description

Balanced high-efficient multistage pump of shaft seal

Technical Field

The utility model relates to the field of multi-stage pump shaft seal balance, in particular to a shaft seal balance efficient multi-stage pump.

Background

The multi-stage pump is a centrifugal pump combining a water inlet section and a water outlet section with a middle section through a pull rod, the output water pressure of the multi-stage pump can be very high, the centrifugal force is obtained by the rotation of an impeller, so that materials are pumped out when the gas density reaches the working range of the mechanical vacuum pump, and high vacuum is gradually obtained.

The axial force balance traditional structure of the multi-stage pump has two types, one type is a balance disc structure which requires a pump rotor to axially shift to adjust a balance disc gap so as to balance the axial force, the axial shift is easy to cause balance disc abrasion and mechanical seal damage, the service life of the pump is low, the maintenance frequency is high, the other type is a balance drum structure which solves the problem of axial shift of the pump rotor and improves the reliability of a mechanical seal, but because the axial length of the balance drum is large, the gap between the balance drum and a balance sleeve is easy to require high precision, the gap is small, the balance drum and the balance sleeve are easy to cause friction damage, the axial force is large and cannot be completely balanced, so that a pump bearing is heated and seriously damaged, the stability of the balance drum structure is poor, the operation safety of a pump group is reduced, the structure has high manufacturing cost and high requirements on processing and assembling precision, and the two types of traditional structures mostly need to add a balance water return pipe, the balanced return pipe can increase the volumetric loss of pump, causes the efficiency reduction of pump.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a shaft seal balance high-efficiency multistage pump to solve the problems in the background technology.

In order to achieve the purpose, the utility model provides the following technical scheme:

the utility model provides a balanced high-efficient multistage pump of axle seal, includes axle and axial force device machine seal, the outside left end of axle is rotated and is connected with bearing body first, the outside fixedly connected with shell of bearing body first, the inboard fixedly connected with middle section of shell, the inboard left end fixedly connected with mechanical seal in middle section, and mechanical seal and axle swivelling joint, the top left side intercommunication of shell has the section of intaking, the outside central point of axle puts fixedly connected with impeller, the top right side intercommunication of shell has out the water section, screw fixedly connected with connects the tail-hood is passed through on the inboard top right side of shell, the right side fixedly connected with bearing body second of shell, and bearing body second with connect tail-hood fixed connection, the inboard central point of bearing body second puts the non-drive end bearing of fixedly connected with.

Preferably, the pump rotor inside the housing is free of axial play.

Preferably, the outside central point of axle puts the off-right fixedly connected with stator, and the stator is the array setting in opposite directions with the impeller.

Preferably, the mechanical seal and the drive end bearing are integrated into a single component, and the axial force device mechanical seal and the non-drive end bearing are integrated into a single component.

Preferably, the balance drum and the balance disc structure are cancelled on the inner side of the shell, and the bearing body A, the middle section and the bearing body B on the inner side of the shell are communicated.

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

1. according to the utility model, through the arrangement of the mechanical seal, the axial force device mechanical seal, the bearing body A and the connecting tail cover, the arrangement is matched with the mechanical seal and the axial force device mechanical seal to be connected with the rotation of the shaft, the fixed connection of the bearing body A and the shell and the fixed connection of the connecting tail cover and the bearing body B, the two traditional structures have the advantages of more maintenance and disassembly parts and large workload, the mechanical seal and the axial force balancing device are integrated into an integral part, and a user only needs to replace the original mechanical seal into the novel type, so that the novel axial force balancing device has the advantages of few parts, high universality, safety and reliability;

2. according to the utility model, through the arrangement of the shaft, the driving end bearing, the non-driving end bearing and the guide vane, the arrangement is matched with the rotary connection of the driving end bearing and the non-driving end bearing with the shaft and the rotary connection of the guide vane with the shaft, a traditional balancing device is cancelled, a balancing water return pipe is cancelled, the problem of axial movement of a pump rotor is solved, the universality is good, the installation is simple and convenient, the novel maintenance and replacement are convenient, the device is arranged outside a pump cavity and can be integrally replaced, fewer parts are required for disassembling the pump body, the maintenance and repair time is short, the balancing water return pipe is cancelled, and the efficiency of the pump is improved.

Drawings

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

fig. 2 is a schematic view of the mounting structure of the shaft of the present invention.

In the figure: 1-shaft, 2-bearing body A, 3-mechanical seal, 4-water inlet section, 5-middle section, 6-impeller, 7-guide vane, 8-water outlet section, 9-connecting tail cover, 10-axial force device mechanical seal, 11-bearing body B, 12-non-driving end bearing, 13-driving end bearing and 14-shell.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution:

a shaft seal balanced high-efficiency multistage pump comprises a shaft 1 and an axial force device mechanical seal 10, wherein the left end of the outer side of the shaft 1 is rotatably connected with a bearing body A2, the outer side of the bearing body A2 is fixedly connected with a shell 14, which is beneficial to protecting each component inside the shell 14, the inner side of the shell 14 is fixedly connected with a middle section 5, the left end of the inner side of the middle section 5 is fixedly connected with a mechanical seal 3, the mechanical seal 3 is rotatably connected with the shaft 1, the left side of the top end of the shell 14 is communicated with a water inlet section 4, the outer side central position of the shaft 1 is fixedly connected with an impeller 6, the right side of the top end of the shell 14 is communicated with a water outlet section 8, the right side of the inner side top end of the shell 14 is fixedly connected with a connecting tail cover 9 through screws, which is beneficial to opening the connecting tail cover 9 to detect the running condition of the component inside the shell 14 of the multistage pump, the right side of the shell 14 is fixedly connected with a bearing body B11, and the bearing body B11 is fixedly connected with the connecting tail cover 9, the center position of the inner side of the bearing body B11 is fixedly connected with a non-driving end bearing 12.

The pump rotor on the inner side of the shell 14 has no axial movement, so that the traditional balance device of the multi-stage pump is convenient to cancel, and the efficiency of the multi-stage pump is improved; a guide vane 7 is fixedly connected to the outer side center position of the shaft 1 in a manner of deviating from the right, and the guide vane 7 and the impeller 6 are arranged in an opposite array, so that maintenance personnel can conveniently replace the shaft 1, the impeller 6 and the guide vane 7 integrally; the mechanical seal 3 and the drive end bearing 13 are integrated into a whole part, and the axial force device mechanical seal 10 and the non-drive end bearing 12 are integrated into a whole part, so that maintenance personnel can conveniently install or dismantle the drive end bearing 13 and the non-drive end bearing 12 of the multistage pump; the inboard balanced drum and the balanced structure of twining of cancellation of shell 14, and the inboard bearing body first 2 of shell 14, middle section 5 and bearing body second 11 intercommunication, be convenient for eliminate traditional balancing unit, cancelled balanced wet return, improved the efficiency of pump.

The working process is as follows: the electric appliance of the device is an external power supply, a worker connects a water inlet section 4 and a water outlet section 8 at the top end of a shell 14 of a multistage pump unit respectively, the power supply is switched on, a drive end bearing 13 at the inner side of the shell 14 starts to work to provide power, a starting shaft 1 starts to rotate to generate axial force, an impeller 6 and a guide vane 7 at the outer side of the control shaft 1 start to work, the impeller 6 and the guide vane 7 start to rotate at the inner side of a middle section 5 at the inner side of the shell 14, a bearing body A2 positions the drive end bearing 13 to position the control shaft 1 to provide power, and the bearing body A is matched with a mechanical seal 3 to be integrated into a whole body, the principle of the shaft seal balanced efficient multistage pump is that the axial force of the multistage pump is balanced by utilizing the mechanical seal 3 capable of generating a balancing force device, the residual axial force of an inner side shaft 1 of a pump set, the impeller 6 and the guide vane 7 is born by a non-drive end bearing 12 at the tail end of the pump, a bearing body B11 positions the right end at the outer side of the non-drive bearing 12 to position the control shaft 1, the shaft 1 is positioned by matching with an axial force device mechanical seal 10, the axial force generated by a multistage pump is dispersed, the rotor of the whole pump is positioned completely, and no axial float exists, because a balance axial force device of a pump set and a mechanical seal 3 are integrated together, a balance water return pipe can be eliminated, the volume loss of the pump is reduced, and the efficiency of the pump is improved.

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 utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a balanced high-efficient multistage pump of shaft seal, includes axle (1) and axial force device machine seal (10), its characterized in that: the left end of the outer side of the shaft (1) is rotatably connected with a bearing body A (2), the outer side of the bearing body A (2) is fixedly connected with a shell (14), the inner side of the shell (14) is fixedly connected with a middle section (5), the left end of the inner side of the middle section (5) is fixedly connected with a mechanical seal (3), the mechanical seal (3) is rotationally connected with the shaft (1), the left side of the top end of the shell (14) is communicated with a water inlet section (4), the central position of the outer side of the shaft (1) is fixedly connected with an impeller (6), the right side of the top end of the shell (14) is communicated with a water outlet section (8), the right side of the top end of the inner side of the shell (14) is fixedly connected with a connecting tail cover (9) through a screw, the right side of the shell (14) is fixedly connected with a bearing body B (11), and the bearing body B (11) is fixedly connected with the connecting tail cover (9), and the center of the inner side of the bearing body B (11) is fixedly connected with a non-driving end bearing (12).

2. The shaft seal balanced high-efficiency multistage pump according to claim 1, characterized in that: the pump rotor inside the housing (14) is free of axial play.

3. The shaft seal balanced high-efficiency multistage pump according to claim 1, characterized in that: the outer side center position of axle (1) is right-hand fixedly connected with stator (7) partially, and stator (7) and impeller (6) are the array setting in opposite directions.

4. The shaft seal balanced high-efficiency multistage pump according to claim 1, characterized in that: the mechanical seal (3) and the drive end bearing (13) are integrated into a whole part, and the axial force device mechanical seal (10) and the non-drive end bearing (12) are integrated into a whole part.

5. The shaft seal balanced high-efficiency multistage pump according to claim 1, characterized in that: the balance drum and the balance disc structure are cancelled on the inner side of the shell (14), and the bearing body A (2), the middle section (5) and the bearing body B (11) on the inner side of the shell (14) are communicated.