CN202789491U

CN202789491U - Hot water circulating pump suspension body with groove structure on inner wall surface

Info

Publication number: CN202789491U
Application number: CN 201220457364
Authority: CN
Inventors: 刘栋
Original assignee: Jiangsu University
Current assignee: Jiangsu University
Priority date: 2012-09-10
Filing date: 2012-09-10
Publication date: 2013-03-13
Anticipated expiration: 2022-09-10

Abstract

The utility model relates to a suspension body of a hot water circulation pump with a groove structure on the inner wall surface, which is composed of a suspension body, a shaft sleeve, a pump main shaft, a guide bearing and an annular cooling fin, wherein the wall surface processing structure size in the suspension body body is the same The rectangular groove strengthens the heat transfer of the fluid in the annular gap formed by the suspension body and the pump main shaft, and effectively transfers the heat of the high-temperature medium to the surrounding environment. An annular cooling fin is installed around the outer wall of the suspension body to transfer the high-temperature medium to the suspension. The heat of the frame body is transmitted to the surrounding air, preventing the heat of the high-temperature fluid in the pump body from being transmitted to the mechanical seal and bearing behind through the suspension body. When the hot water circulating pump is working, the suspension body separates the impeller running area with high temperature from the working area of the mechanical seal and bearing. The utility model can be used to transform the existing hot water circulation pump, so as to realize the air cooling of the hot water circulation pump.

Description

A kind of internal face is with the hot water circulating pump suspension body of groove structure

Technical field

The utility model relates to and is applied to metallurgy, electric power, petrochemical industry, residual heat and energy and utilizes in the pipeline or loop in the system, carries the suspension body structure in the recycle pump of high-temp liquid medium.

Background technique

In the fields such as metallurgy, power station, chemical industry, residual heat and energy, can need to use water pump for the hot water circuit in system's pipeline or the loop.

The ordinary cycle pump does not have cooling unit, and its mechanical seal and bearing can't bear high temperature media and damage, and the ordinary cycle pump can't satisfy the service condition of carrying the high-temp liquid system at all, so hot water circulating pump has had good application prospect.

What use was more at present is to adopt the water-cooled hot water circulating pump, this pump utilization cooling water circuit is isolated the temperature of fed sheet of a media, avoid mechanical seal and bearing to be subject to the impact of high temperature, so that recycle pump can keep stable operation, but also there are the potential problems such as external refrigeration water shortage and cooling line obstruction in this structure, and then cause mechanical seal and bearing at high temperature to move, and cause end wear, produce leakage problem.In addition, in the suspension body as rotor supports bearing is housed, has equally above-mentioned cooling problem.

Summary of the invention

The purpose of this utility model is in order to guarantee hot water circulating pump steadily in the long term operation under the operating mode that does not adopt extraneous cooling water, avoid adopting complicated water-cooled structure, simultaneously can using water wisely, avoid the pump operation accident that causes owing to cooling water deficiency or line clogging.

For achieving the above object, solution of the present utility model is: comprise the suspension body, axle sleeve, pump main shaft, guide bearing, annular fin; The pump operation zone that described suspension body is higher with temperature and the working zone of mechanical seal and bearing separate, the axial centre position of suspension body arranges through hole, the inwall of through hole is processed groove vertically, groove runs through whole suspension body, and the pump main shaft passes the through hole in the suspension body, cooperates with the suspension body space, the two ends of suspension body are equipped with flange plate, the through hole of 4 connection usefulness of flange plate circumferential arrangement, the flange of left end links to each other with pump cover on the suspension body, and the flange of right-hand member links to each other with bearing housing on the suspension body; On the pump main shaft axle sleeve is housed, guide bearing is installed in the cavity that axle sleeve and suspension body form, that section of on the pump main shaft axle sleeve being installed is along the groove of axially offering two rectangles, and two grooves are worked into shaft shoulder place always, and the angle of two grooves on main shaft is 180 ^o, simultaneously at 2 through holes of right-hand member processing of axle sleeve, communicate with two grooves on the pump main shaft respectively.

Suspension body inwall is evenly arranged the identical groove of physical dimension vertically, and the external diameter of suspension body is D _o, pump main shaft diameter is D, the degree of depth of groove is 0.1*(D _o-D), its width is 0.2*(D _o-D), in the time of the hot water circuit pump operation, the suspension body is static, pump main shaft High Rotation Speed, it is moving that inside, annular space in the middle of it will form Taylor's couette flow, the groove of some is set at suspension body inwall, stronger swirl flow also can be gone in groove inside, should flow to play and strengthen the effect of conducting heat, can be delivered to rapidly the fluid heat in the annular space in the surrounding environment, annular fin is installed on the outer wall of suspension body, and the external diameter of annular fin is the outer diameter D of 2 times suspension body _o, thickness is the outer diameter D of 0.1 times suspension body _oThis annular fin can be strengthened the convection heat exchange effect of suspension body and surrounding atmosphere, and the annular fin of installing by internal face groove and outer wall stops heat to be transferred to effect on rear face mechanical seal and the bearing so that suspension body 1 plays.Pump main shaft left-hand component has been installed guide bearing, and in order to solve the lubrication problem of guide bearing, pump main shaft left half is along the groove of axially offering two rectangles, and the angle of two grooves on main shaft is 180 ^oThe degree of depth of groove is 0.1 times of this pump shaft footpath, place, width is 0.2 times of this pump shaft footpath, place, communicate with groove on the pump main shaft at the right-hand member processing through hole of axle sleeve simultaneously, the diameter of through hole is 0.2 times the diameter of axle, the highly pressurised liquid of process impeller flows to guide bearing by the gap of pump postoperculum plate, then flows to the lower pump inlet of pressure by the groove of offering on axle sleeve and the main shaft, has finished the circulation loop of a closure.Pass the main shaft of pump in the middle of the suspension body, this axle passes the axle of suspension body proportion by subtraction ordinary hot water-circulating pump and will grow, the further like this heat diffusion area that increases the suspension body, suspension body left-hand component directly links to each other with the pump cover of hot water circulating pump, right-hand component connection bearing case and mechanical sealing base.

Hot water circulating pump is when work, the pump operation zone that the suspension body is higher with temperature effectively separates with mechanical seal and bearing working zone, high temperature media exerts an influence to the operation of sealing with regard to being not enough to along the axial heat that passes to mechanical seal by the suspension body like this, and the guide bearing that suspension body front end is installed has self-lubricating function, can realize selflubricating by the thermal medium of pump body.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Fig. 2 is the sectional drawing of pump main shaft left-half in the utility model, is used for describing the groove structure of offering on the main shaft.

Fig. 3 is the schematic representation of suspension body inner wall trench structure in the utility model.

Embodiment

To be the internal face that the utility model related to by guide bearing link to each other with hot water circulating pump pump main shaft with the suspension body of groove structure embodiment of the present utility model, the suspension body left side links to each other with pump cover by bolt, and the right is connected with mechanical sealing base and the bearing housing of hot water circulating pump.

Such as Fig. 1, the utility model comprises: suspension body 1, axle sleeve 2, pump main shaft 3, guide bearing 4, annular fin 5.Suspension body 1 pump operation that temperature is higher zone and mechanical seal and bearing the working zone separate.Suspension body 1 through hole axially is set, the inwall of through hole is processed groove vertically, the degree of depth 0.1*(D of groove _o-D), its width is 0.2*(D _o-D), groove runs through whole suspension body, pump main shaft 3 passes the through hole in the suspension body 1, with suspension body 1 Spielpassung, the two ends of suspension body 1 are equipped with flange plate, the through hole of 4 connection usefulness of flange plate circumferential arrangement, the flange of left end links to each other with pump cover on the suspension body 1, and the flange of left end links to each other with bearing housing on the suspension body 1.Axle sleeve 2 is housed on the pump main shaft 3, in the cavity that axle sleeve 2 and suspension body 1 form guide bearing 4 is installed, that section of on the pump main shaft 3 axle sleeve 2 being installed is along the groove of axially offering two rectangles, and two grooves are worked into shaft shoulder place always, and the angle of two grooves on main shaft is 180 ^o, the degree of depth of groove is 0.1 times of this pump shaft footpath, place, and width is processed 2 through holes at the right-hand member of axle sleeve 2 simultaneously for 0.2 times of this pump shaft footpath, place, communicates with two grooves on the pump main shaft 3 respectively, and the diameter of through hole is 0.2 times the diameter of axle.Outer wall at suspension body 1 is installed the annular fin 5 that is parallel to suspension body two end flange, and its external diameter is the outer diameter D of 2 times suspension body _o, thickness is the outer diameter D of 0.1 times suspension body _o, the number of annular fin 5 is 3.

As shown in Figure 2, when high temperature media transmits by hot water circulating pump, a small amount of highly pressurised liquid through impeller will flow to guide bearing by the gap of pump postoperculum plate, then the groove by offering on the main shaft, flow to the lower pump inlet of pressure, finished the circulation loop of a closure, realized lubricating guide bearing, two grooves that are arranged symmetrically with among Fig. 2 are the groove of lubricated guide bearing 4 usefulness, and the 3rd groove is the fixing keyway of impeller among the figure.

Suspension body 1 inwall offers the identical groove of physical dimension, it is moving to go into Taylor-couette flow in the annular space of suspension body 1 and pump main shaft 3 compositions, in the time of pump main shaft High Rotation Speed, can form swirl flow in the internal face groove, this can play strengthens the diabatic process effect, reduction is transferred to the heat of mechanical seal and bearing by suspension body 1 by high temperature media, annular fin 5 has been installed around suspension body 1 outer wall, high temperature media can carry out heat exchange by annular fin 5 and external environment by most of heat of suspension body 1 transmission, pump main shaft 3 passes the axle of suspension body proportion by subtraction ordinary hot water-circulating pump and will grow, the further like this heat diffusion area that increases suspension body 1, increase the region area that hot fluid flows through, strengthened the function of heat radiation.

Suspension body 1 will effectively stop the heat of high temperature media to be transferred to the working zone of mechanical seal and bearing, the groove structure that suspension body internal face arranges can be fast with the towards periphery environment transmission of heat of high temperature media, thereby guaranteed the long-time steady operation of mechanical seal and bearing, realized the operation of hot water circulating pump long-term stability.

Claims

1. A hot water circulating pump suspension body with a groove structure on the inner wall, characterized in that it includes a suspension body (1), a shaft sleeve (2), a pump main shaft (3), and a guide bearing (4), Annular heat sink (5); the suspension body (1) separates the high-temperature pump operation area from the mechanical seal and bearing work area, and a through hole is set at the axial center of the suspension body (1) to pass through The inner wall of the hole is machined with grooves along the axial direction, the grooves run through the entire suspension body, the pump main shaft (3) passes through the through hole in the suspension body (1), and is in clearance fit with the suspension body (1), and the suspension body ( Both ends of 1) are provided with flanges, and four through holes for connection are arranged in the circumferential direction of the flanges. The flange on the upper left end of the suspension body (1) is connected with the pump cover, and the upper right end of the suspension body (1) is The flange is connected with the bearing box; the pump main shaft (3) is equipped with a shaft sleeve (2), and the guide bearing (4) is installed in the cavity formed by the shaft sleeve (2) and the suspension body (1), and the pump main shaft (3) The section where the shaft sleeve ( 2 ) is installed on the top is provided with two rectangular grooves along the axial direction, the two grooves are machined to the shaft shoulder, the angle between the two grooves on the main shaft is 180 ^o , and at the same time Two through holes are processed on the right end of the cover (2), respectively communicating with two grooves on the pump main shaft (3).

2. A hot water circulating pump suspension body with a groove structure on the inner wall surface according to claim 1, characterized in that, on the outer wall surface of the suspension body (1), a The annular cooling fins (5) of the flanges at both ends, whose outer diameter is twice the outer diameter D _o of the suspension body 1, and whose thickness is 0.1 times the outer diameter D _o of the suspension body (1), the annular cooling fin ( 5) The number is 3.

3. A hot water circulation pump suspension body with a groove structure on the inner wall according to claim 1 or 2, characterized in that the depth of the groove on the inner wall of the through hole on the suspension body (1) is 0.1*(D _o -D), the width is 0.2*(D _o -D), D _o is the outer diameter of the suspension body (1), and D is the diameter of the pump main shaft (2).

4. A hot water circulating pump suspension with a groove structure on the inner wall according to claim 1 or 2, characterized in that the depth of the two grooves on the pump main shaft (3) is 0.1 times the diameter of the pump shaft, and the width is 0.2 times the diameter of the pump shaft.

5. A hot water circulating pump suspension body with a groove structure on the inner wall according to claim 1 or 2, characterized in that the diameter of the two through holes on the bushing (2) is It is 0.2 times of the shaft diameter of the pump main shaft (3).