CN213088258U

CN213088258U - Pump with improved pump body inner cavity exhaust structure

Info

Publication number: CN213088258U
Application number: CN202021211071.3U
Authority: CN
Inventors: 李海尧; 应卓浪; 李丽东; 蔡金峰; 杨岩松; 田海川
Original assignee: Zhejiang Shimge Pump Co Ltd
Current assignee: Zhejiang Shimge Pump Co Ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-04-30
Anticipated expiration: 2030-06-28

Abstract

The utility model relates to an improvement pump body inner chamber exhaust structure's pump solves the problem that has the unable complete discharge of air in the impeller cavity to arouse among the prior art, the technical scheme of adoption: the pump casing is provided with an exhaust hole penetrating through the pump casing, and the inner end of the exhaust hole is communicated with the impeller cavity. The method has the following effects: set up the exhaust hole that runs through the pump casing on the pump casing, the inner intercommunication in exhaust hole, the impeller cavity, further say the exhaust hole set up the position with the position that sets up of machinery secret is corresponding in the axial, can discharge the gas in the impeller cavity as far as, avoids gathering in the mechanical seal department of close, makes mechanical seal can fully obtain lubrication and cooling, avoids appearing dry running, makes mechanical seal effective work, and then avoids leading to the condition appearance that the motor burns out because of mechanical seal inefficacy.

Description

Pump with improved pump body inner cavity exhaust structure

Technical Field

The utility model relates to a water pump especially relates to a pump of improvement pump body inner chamber exhaust structure.

Background

After a water pump is launched, air in the inner cavity of the pump body cannot be completely discharged, cavities reserved in the inner cavity of the pump body are generally compressed and accumulated at a mechanical seal position, so that liquid cannot enter the mechanical seal, the mechanical seal cannot be lubricated and cooled in time, a friction pair of a moving ring and a static ring on the mechanical seal is subjected to dry running, high temperature and adhesion are generated, and finally the mechanical seal fails and a motor is burnt out.

Disclosure of Invention

An object of the utility model is to solve the above-mentioned problem that prior art exists and provide an improvement pump body inner chamber exhaust structure's pump, set up the exhaust hole that runs through the pump casing on the pump casing, the inner intercommunication in exhaust hole, the impeller cavity, further exhaust hole set up the position with mechanical seal's the position that sets up corresponds in the axial, can discharge the gas in the impeller cavity as far as, avoids gathering in mechanical seal department, makes mechanical seal can fully obtain lubrication and cooling, avoids appearing dry operation, makes mechanical seal effective work, and then avoids appearing because of the condition that mechanical seal became invalid and lead to the motor to burn out.

The above technical purpose of the present invention is mainly solved by the following technical solutions: the pump comprises a pump shell, an impeller arranged in an impeller cavity of the pump shell, a rotor assembly arranged in a motor cavity of the pump shell, a rotor shaft arranged on the rotor assembly, a bearing, a mechanical seal and the impeller, wherein the impeller end of the rotor shaft is sequentially provided with the bearing, the bearing is arranged in the bearing seat, the mechanical seal is arranged in the impeller cavity and is characterized in that exhaust holes penetrating through the pump shell are formed in the pump shell, and the inner ends of the exhaust holes are communicated with the impeller cavity. Set up the exhaust hole that runs through the pump casing on the pump casing, the inner intercommunication in exhaust hole, the impeller cavity, further say the exhaust hole set up the position with mechanical seal's the position that sets up corresponds in the axial, can discharge the gas in the impeller cavity as far as, avoids gathering in mechanical seal department, makes mechanical seal can fully obtain lubrication and cooling, avoids appearing dry running, makes mechanical seal effective work, and then avoids leading to the condition appearance that the motor burns out because of mechanical seal inefficacy.

As further improvement and supplement to the above technical scheme, the utility model discloses a following technical measure:

the arrangement position of the exhaust hole corresponds to the arrangement position of the mechanical seal in the axial direction. In general, when the impeller is located below and the motor cavity is located above in use, the mechanical seal is arranged above the impeller, and in order to exhaust air in the impeller cavity through the exhaust hole as much as possible, the arrangement position of the exhaust hole needs to be matched with the axial position of the mechanical seal.

Further, the axial position of the exhaust hole is the same as or higher than the axial position of the mechanical seal.

In general, the diameter of the exhaust hole is 2-5mm in order to smoothly exhaust.

In order to reduce the friction between the bearing and the bearing seat, the bearing is a sliding bearing, and the bearing seat and the pump housing are of an integral structure.

In order to further reduce friction between the bearing and the bearing seat and fully lubricate and cool the mechanical seal, a first oil guide channel is arranged on the bearing, a second oil guide channel is arranged on the bearing seat and communicated with the first oil guide channel, the inner end of the first oil guide channel is matched with the rotor shaft, and the outer end of the second oil guide channel is communicated with the motor cavity.

Preferably, the axial line of the first oil guide channel and the axial line of the second oil guide channel are in the same straight line, the first oil guide channel is arranged obliquely, the inner end of the first oil guide channel is axially close to the mechanical seal, and the outer end of the first oil guide channel is axially far away from the mechanical seal; the second leads oily passageway slope to set up, the second lead oily passageway the inner with the outer end intercommunication of first oily passageway of leading, the second lead oily passageway the outer end with the bottom cooperation in motor chamber.

The utility model discloses beneficial effect who has: set up the exhaust hole that runs through the pump casing on the pump casing, the inner intercommunication in exhaust hole, the impeller cavity, further say the exhaust hole set up the position with mechanical seal's the position that sets up corresponds in the axial, can discharge the gas in the impeller cavity as far as, avoids gathering in mechanical seal department, makes mechanical seal can fully obtain lubrication and cooling, avoids appearing dry running, makes mechanical seal effective work, and then avoids leading to the condition appearance that the motor burns out because of mechanical seal inefficacy.

Drawings

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

Fig. 2 is an enlarged schematic view of a portion a of fig. 1.

Fig. 3 is a schematic structural diagram of a pump housing according to the present invention.

Fig. 4 is an enlarged schematic view of part B of fig. 1.

Detailed Description

The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.

Example (b): as shown in fig. 1-4, a pump with an improved pump body inner cavity exhaust structure comprises a pump housing 1, an impeller 2 arranged in an impeller cavity 7 of the pump housing, a rotor assembly 3 arranged in a motor cavity 6 of the pump body, a rotor shaft 31 arranged on the rotor assembly, a bearing 4, a mechanical seal 5 and the impeller 2 sequentially arranged at an impeller end of the rotor shaft, a bearing seat 11 arranged on the pump housing 1, the bearing 4 arranged in the bearing seat 11, the mechanical seal 5 arranged in the impeller cavity 7, an exhaust hole 12 penetrating through the pump housing arranged on the pump housing 1, and an inner end of the exhaust hole 12 communicated with the impeller cavity 7. Set up the exhaust hole that runs through the pump casing on the pump casing, the inner intercommunication in exhaust hole, the impeller cavity, further say the exhaust hole set up the position with mechanical seal's the position that sets up corresponds in the axial, can discharge the gas in the impeller cavity as far as, avoids gathering in mechanical seal department, makes mechanical seal can fully obtain lubrication and cooling, avoids appearing dry running, makes mechanical seal effective work, and then avoids leading to the condition appearance that the motor burns out because of mechanical seal inefficacy.

In order to enable better venting, the venting holes 12 are arranged in an axial direction corresponding to the position of the mechanical seal 5. In general, when the impeller is located below and the motor cavity is located above in use, the mechanical seal is arranged above the impeller, and in order to exhaust air in the impeller cavity through the exhaust hole as much as possible, the arrangement position of the exhaust hole needs to be matched with the axial position of the mechanical seal.

Further, the axial position of the exhaust hole 12 is the same as or higher than the axial position of the mechanical seal 5.

In general, the diameter of the exhaust hole 12 is 2 to 5mm in order to smoothly exhaust air.

In order to reduce the friction between the bearing 4 and the bearing seat 11, the bearing is a sliding bearing, and the bearing seat and the pump housing are of an integral structure.

In order to further reduce friction between the bearing and the bearing seat and fully lubricate and cool the mechanical seal, a first oil guide channel 41 is arranged on the bearing, a second oil guide channel 11-1 is arranged on the bearing seat, the first oil guide channel is communicated with the second oil guide channel, the inner end of the first oil guide channel is matched with the rotor shaft, and the outer end of the second oil guide channel is communicated with the motor cavity.

Preferably, the axis of the first oil guide channel 41 and the axis of the second oil guide channel 11-1 are collinear, the first oil guide channel is arranged obliquely, the inner end of the first oil guide channel is axially close to the mechanical seal, and the outer end of the first oil guide channel is axially far away from the mechanical seal; the second leads oily passageway slope setting, the second lead oily passageway the inner with the outer end intercommunication of first oily passageway of leading, the second lead oily passageway the outer end with the bottom cooperation of motor chamber 6.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. In the above embodiments, the present invention may be variously modified and changed. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The pump comprises a pump shell, an impeller arranged in an impeller cavity of the pump shell, a rotor assembly arranged in a motor cavity of the pump shell, a rotor shaft arranged on the rotor assembly, a bearing, a mechanical seal and the impeller, wherein the impeller end of the rotor shaft is sequentially provided with the bearing, the bearing is arranged in the bearing seat, the mechanical seal is arranged in the impeller cavity and is characterized in that exhaust holes penetrating through the pump shell are formed in the pump shell, and the inner ends of the exhaust holes are communicated with the impeller cavity.

2. The pump of claim 1, wherein the exhaust hole is disposed at a position axially corresponding to the mechanical seal.

3. The pump with the improved pump body cavity exhaust structure according to claim 2, wherein the axial position of the exhaust hole is the same as or higher than the axial position of the mechanical seal.

4. The pump with the improved pump body cavity exhaust structure according to any one of claims 1-3, wherein the diameter of the exhaust hole is 2-5 mm.

5. The pump of any one of claims 1 to 3, wherein the bearing is a sliding bearing, and the bearing seat is of an integral structure with the pump housing.

6. The pump of claim 5, wherein a first oil guide channel is disposed on the bearing, a second oil guide channel is disposed on the bearing seat, the first oil guide channel and the second oil guide channel are communicated, an inner end of the first oil guide channel is engaged with the rotor shaft, and an outer end of the second oil guide channel is communicated with the motor cavity.

7. The pump with the improved pump body inner cavity exhaust structure according to claim 6, wherein the axis of the first oil guide channel and the axis of the second oil guide channel are collinear, the first oil guide channel is obliquely arranged, the inner end of the first oil guide channel is axially close to the mechanical seal, and the outer end of the first oil guide channel is axially far away from the mechanical seal; the second leads oily passageway slope to set up, the second lead oily passageway the inner with the outer end intercommunication of first oily passageway of leading, the second lead oily passageway the outer end with the bottom cooperation in motor chamber.