CN201330753Y

CN201330753Y - Self-cooling structure of multi-stage centrifugal pump

Info

Publication number: CN201330753Y
Application number: CNU2008202239661U
Authority: CN
Inventors: 廖大庆; 陈林
Original assignee: SICHUAN SHENGDA PUMP EQUIPMENT MANUFACTURE Co Ltd
Current assignee: SICHUAN SHENGDA PUMP EQUIPMENT MANUFACTURE Co Ltd
Priority date: 2008-12-30
Filing date: 2008-12-30
Publication date: 2009-10-21
Anticipated expiration: 2018-12-30

Abstract

The utility model discloses a self-cooling structure of a multi-stage centrifugal pump, comprising an axial force balance pipeline, a front-end bearing body and a back-end bearing body, wherein the axial force balance pipeline is communicated with the inner cavity of a pump tail-bonnet and a suction inlet, and both the front-end bearing body and the back-end bearing body are respectively provided with a cooling cavity. The self-cooling structure is characterized in that the back end of the axial force balance pipeline is connected with the cooling cavity of the back-end bearing body, and the suction inlet is connected with the cooling cavity of the front-end bearing body through another connecting pipe; and the cooling cavities of the front-end bearing body and the back-end bearing body are connected by a pipeline. The utility model uses the conveying medium itself to cool without a special cooling medium conveying pipeline, and has the advantages of convenient installation and low cost.

Description

Certainly the cooling structure of multistage centrifugal pump

Technical field

The utility model relates to a kind of bearing cooling structure of multistage centrifugal pump.

Background technique

At present, the multistage centrifugal pump of most of manufacturer production, as Fig. 1, Fig. 2 and shown in Figure 3, all be provided with the inner chamber of connection pump tail-hood 1 and the axial force balance pipeline 3 of suction port 2, in use, can leak out the part fed sheet of a media continuously, be about 2% of pump duty by this pipeline 3, directly flow back into pump intake 2 again, realize balance of axial force; And present cooling to the pump bearings at both ends, the general water-cooled that adopts, cooling medium enters the cooling chamber of front and back ends bearing support 4,5 through special pipeline 9, through special pipeline 10 cooling medium is transported away again, the heat that has been produced when so just having taken away the bearing high speed rotating, thus realized cooling to bearing; This cooling structure effect is better, but more loaded down with trivial details when mounted, and the user need connect special cooling medium conveyance conduit, and cost is higher relatively.

The model utility content

The purpose of this utility model is the above-mentioned deficiency at prior art, and a kind of cooling structure certainly of multistage centrifugal pump is provided, and it has easy for installation, lower-cost advantage.

For achieving the above object, the bearing of multistage centrifugal pump of the present utility model is from cooling off structure, comprise and be communicated with pump tail-hood inner chamber and the axial force balance pipeline of suction port, the front end bearing support that is equipped with cooling chamber and rear end bearing body, the rear end that it is characterized in that the axial force balance pipeline links to each other with the cooling chamber of rear end bearing body by a connecting tube, suction port links to each other with the cooling chamber of front end bearing support by another connecting tube, and the cooling chamber of front and back ends bearing support connects by pipeline;

Working principle is: when carrying the normal temperature medium, when the medium that comes out by the axial force balance pipeline leakage, part medium can directly be got back to pump intake through equalizing line, the requirement of pressure release when at first having guaranteed balancing axial thrust, another part normal temperature medium then successively through the cooling chamber of pump bearings at both ends body, is also got back to pump intake at last, like this medium bearing support of flowing through continuously, constantly take away the heat that produces on the bearing, reach cooling purpose; Owing to be to utilize fed sheet of a media itself to cool off, need not special cooling medium conveyance conduit, have easy for installation, lower-cost advantage.

Description of drawings

Fig. 1 is the structural representation of existing multistage centrifugal pump.

Fig. 2 is the plan view of Fig. 1.

Fig. 3 is the right elevation of Fig. 1.

Fig. 4 is a structural representation of the present utility model.

Fig. 5 is the plan view of Fig. 4.

Fig. 6 is the right elevation of Fig. 4.

Embodiment

Below in conjunction with accompanying drawing the utility model is described in further detail.

By Fig. 4, Fig. 5 and shown in Figure 6, certainly the cooling structure of multistage centrifugal pump of the present utility model, comprise the axial force balance pipeline 3 that is communicated with pump tail-hood 1 inner chamber and suction port 2, be equipped with the front end bearing support 4 and the rear end bearing body 5 of cooling chamber, the rear end that it is characterized in that axial force balance pipeline 3 links to each other with the cooling chamber of rear end bearing body 5 by a connecting tube 6, suction port 2 links to each other with the cooling chamber of front end bearing support 4 by another connecting tube 7, and the cooling chamber of front and back ends bearing support 4,5 connects by pipeline 8;

The utility model utilizes fed sheet of a media itself to cool off when carrying the normal temperature medium, need not special cooling medium conveyance conduit, has easy for installation, lower-cost advantage.

Claims

1. the cooling structure certainly of a multistage centrifugal pump, comprise and be communicated with pump tail-hood inner chamber and the axial force balance pipeline of suction port, the front end bearing support that is equipped with cooling chamber and rear end bearing body, the rear end that it is characterized in that the axial force balance pipeline links to each other with the cooling chamber of rear end bearing body by a connecting tube, suction port links to each other with the cooling chamber of front end bearing support by another connecting tube, and the cooling chamber of front and back ends bearing support connects by pipeline.