CN2721920Y

CN2721920Y - Self-suction pump

Info

Publication number: CN2721920Y
Application number: CN 200420070204
Authority: CN
Inventors: 祝甫光; 安广山
Original assignee: Dalian Deep Blue Pump Co Ltd
Current assignee: Dalian Deep Blue Pump Co Ltd
Priority date: 2004-08-06
Filing date: 2004-08-06
Publication date: 2005-08-31
Anticipated expiration: 2014-08-06

Abstract

The utility model relates to an automatic suction pump whose pump body is provided with an integral structure of an injection chamber, an air separation chamber and a spiral chamber. An impeller is a back-opening type impeller with a balance hole. The space of the blade of the impeller and a pump cover is provided with a certain controller gap. A bearing box body and a bearing box adopt thread connection. The inner portion of a sealing chamber is provided with a flow guiding block. The utility model is characterized in that the automatic effect of the pump is good with high efficiency, the axial force generated by the impeller, the anti-gas-corrosion ability is strong, the service life of the bearing and the mechanical sealing is prolonged, the axial gap adjustment of the pump is convenient, the pump performance can be recovered after abrasion by adjustment, the repair is convenient and the repair expense is low.

Description

Self-priming pump

Technical field the utility model relates to a kind of pump, especially for the self-priming pump of fed sheet of a media.

Background technique is applied in the self-priming pump of industries such as petrochemical industry, smelting, papermaking, medicine, food processing, mainly is to be made of the pump housing, pump shaft, impeller, axle sealing structure, bearing.The deficiency of this self-priming pump is: the pump housing is two body structures that separate with spiral case, installs cumbersome; The axial force that impeller produces is bigger, influences bearing working life, behind the damage in impeller, can't recover its performance, can only change impeller; Washing solution in the closed chamber is moving around axial flow, and the solid particle in the liquid acts in the mechanical seal, reduces the working life of mechanical seal; The adjustment of the axial clearance of pump need be dismantled the pump housing, is not easy to maintenance, increases maintenance cost.

The summary of the invention the purpose of this utility model is the self-priming pump that a kind of efficient height, long service life is provided, is convenient to installation and maintenance.

The purpose of this utility model is achieved in that a kind of self-priming pump, comprising: the pump housing, impeller, pump shaft, mechanical seal parts, bearing part is characterized in that the pump housing is the integrative-structure with perfusion compartment, deaerating chamber and volute; Impeller is the back of the body unshrouded impeller that has equalizing orifice, has certain controlled gap between impeller blade and the pump cover; Adopt between bearing housing and the bearing box and be threaded; Be provided with baffle in the closed chamber.

Gap between impeller and the pump cover is the 0.3-1 millimeter.

Baffle is the wedge shape projection that is evenly distributed on the closed chamber inwall.

The self-priming pump that the utility model provides, its pump housing are to have big perfusion compartment and deaerating chamber and volute, also are convenient to installation, maintenance when realizing self-priming performance, reduce maintenance cost.The back of the body unshrouded impeller that has equalizing orifice, can improve the anti-cavitation performance and the efficient of pump, balancing axial thrust to greatest extent, prolonged the working life of the service cycle and the bearing of mechanical seal, back of the body unshrouded impeller also makes the pump cover cover plate become wear surface, reduce the impact of fed sheet of a media, reduce wearing and tearing impeller.Bearing housing adopts with bearing box and is threaded, and need not take apart under the condition of pump, can adjust axial clearance exactly, recovers pump performance, and is easy to maintenance, reduces maintenance cost.For can prolonged mechanical working life of sealing, baffle is set in closed chamber, it can change the flow direction of washing solution, make liquid by moving around moving the becoming of axial flow along axial flow, help to keep the suspension of solid particle in the liquid, the erosion effect is reduced to minimum, also have stronger heat radiation simultaneously and get rid of the steam ability, with solid, gas and the heat band tool sealed member of disembarking.

Compare with existing self-priming pump, the utlity model has following advantage: the self-priming of pump is effective, the efficient height, the axial force that impeller produces is little, and the anti-cavitation ability is strong, has prolonged the working life of mechanical seal and bearing, the axial clearance of pump is easy to adjust, still can recover its performance by adjusting behind the damage in impeller, be convenient to maintenance, maintenance expenses is low.

Description of drawings Fig. 1 is a structural representation of the present utility model;

Embodiment is described further below in conjunction with accompanying drawing:

As shown in Figure 1, present embodiment provides self-priming pump mainly to be made up of the pump housing 1, impeller 3, middle linkage section 6, pump shaft 5, mechanical seal parts, bearing part.The pump housing is the integrative-structure with perfusion compartment 24, deaerating chamber 2 and volute 22, and the pump housing is connected with pump cover 21.Impeller is the back of the body unshrouded impeller that has equalizing orifice, there is 0.5 millimeter controlled gap between impeller blade and the pump cover, axle sleeve 19 outsides of pump shaft are provided with mechanical seal 20, seal form can be filler, single envelope, two envelopes etc., closed chamber is to be evenly distributed with baffle 4 on the center hole wall of pump cover, and baffle is and hole wall all-in-one-piece wedge shape projection.Bearing part is made up of bearing housing 11, bearing box 12, bearing 7,15, and bearing housing adopts with bearing box and is threaded, and rotates by anti-turn screw 14 restriction bearing boxs, is cast with graduated scale will on the bearing box.The end that is located at the bearing 15 in the bearing box is spacing by bearing pressure ring 10.Be provided with bearing isolating ring 13 between bearing box and the axle.Be provided with splash ring 8, cooling tube 18 in the bearing housing, bearing housing is provided with air relief cock 9 and oil drain plug 17 and is connected with leg 16.23 is pump housing choma.25 is pump housing gland.

Claims

1, a kind of self-priming pump comprises: the pump housing, impeller, pump shaft, mechanical seal parts, bearing part is characterized in that the pump housing is the integrative-structure with perfusion compartment, deaerating chamber and volute; Impeller is the back of the body unshrouded impeller that has equalizing orifice, has certain controlled gap between impeller blade and the pump cover; Adopt between bearing housing and the bearing box and be threaded; Be provided with baffle in the closed chamber.

2, self-priming pump according to claim 1 is characterized in that the gap between impeller and the pump cover is the 0.3-1 millimeter.

3, self-priming pump according to claim 1 is characterized in that baffle is the wedge shape projection that is evenly distributed on the closed chamber inwall.