CN202883496U

CN202883496U - Novel centrifugal water pump

Info

Publication number: CN202883496U
Application number: CN 201220635252
Authority: CN
Inventors: 邹攀; 王建国
Original assignee: CHONGQING JIANNENG MACHINERY Co Ltd
Current assignee: CHONGQING JIANNENG MACHINERY Co Ltd
Priority date: 2012-11-27
Filing date: 2012-11-27
Publication date: 2013-04-17
Anticipated expiration: 2022-11-27

Abstract

The utility model discloses a novel centrifugal water pump, comprising a pump body, wherein the pump body comprises a shell, a water inlet joint, a water outlet joint, an impeller, a pump shaft, and an engine for driving the pump shaft to rotate. The novel centrifugal water pump is characterized by also comprising a thermal-insulating connecting plate for isolating heat of the engine; and the thermal-insulating connecting plate is arranged on the pump shaft in a penetrating manner and fixedly connected with the shell or the engine. The thermal-insulating connecting plate is added between the engine and the pump body in the novel centrifugal water pump, and the thermal-insulating connecting plate is made of a thermal insulation material, so that the heat generated by the engine after the novel centrifugal water pump works is not transmitted to the pump body, and absorbed by the pump body, and an air bubble is not easily generated in the pump body.

Description

Centrifugal water pump

Technical field

The utility model relates to a kind of water pump, relates in particular to a kind of centrifugal water pump.

Background technique

The conventional centrifugal water pump comprises: the pump housing, the pump housing further comprise housing, water intake, water outlet, impeller, pump shaft; And drive the motor that pump shaft rotates, and such pump working principle is as follows: namely driving machine produces centrifugal force by the rotation of pump shaft impeller, and under centrifugal action, liquid is thrown toward impeller outlet along blade passage, and liquid is collected through spiral case and is sent into discharge tube.Liquid obtains energy from impeller, and can all increase pressure energy and speed, and relies on this energy that liquid is transported to the job site.When liquid is thrown toward impeller outlet, the impeller eye center has formed low pressure, has just produced pressure reduction between the liquid of imbibition tank and impeller center, the liquid in the imbibition tank is under this differential pressure action, and constantly the suction chamber through suction line and pump enters in the impeller.

Further, during such centrifugal pump running, the meeting that the heat that motor produces is difficult to avoid is absorbed by the pump housing, and then easily produces bubble in the pump housing.Simultaneously, the gas overflowing that is dissolved in the liquid may be arranged also, they can gather the more bubbles of formation.When bubble flow to leaf road internal pressure higher position with liquid, the fluid pressure of outside was higher than the pressure for vaporization in the bubble, and then bubble can condense to crumble and fall and form the hole.Liquid around in moment is brought to the hole with high speed, causes liquid to clash into mutually, and local pressure is increased severely suddenly.This not only hinders the proper flow of fluid, more seriously, if these bubbles are crumbled and fall near the impeller wall, then liquid is just as the first sample of countless submissiles, hit continuously the metal surface, its collision frequency very high (reached at the 2000-3000Hz that has), the metal surface can be because of the impact fatigue breakaway.If be mingled with some reactive gas (such as oxygen etc.) in the bubble, the energy that they emit when condensing by bubble (local temperature can reach 200-300 ℃), also can form thermocouple and produce electrolysis, metal is played the electrochemical corrosion effect, more accelerate the breakdown speed that metal degrades.Above-mentioned this vaporizing liquid, condense, impact, form high pressure, high temperature, high-frequency impulsive load, the mechanical breakaway that causes metallic material is called cavitation erosion with the comprehensive phenomenon of electrochemical corrosion destruction.Cavitation phenomenon is particularly serious to the pump body structural damage, so such problem needs to be resolved hurrily.

The model utility content

For the problems referred to above that prior art exists, the utility model provides the heat behind a kind of engine running can not affect the pump housing and then produces the centrifugal water pump of cavitation phenomenon.

To achieve these goals, the utility model adopts following technological scheme: a kind of centrifugal water pump, comprise the pump housing, and the described pump housing has housing, water intake joint, water outlet joint, impeller, pump shaft; And the motor that is used for driving described pump shaft rotation; It is characterized in that, comprise that also be used to the heat insulation land of isolating described heat of engine, it is arranged in pump shaft and affixed with described housing or motor.

Preferably, described heat insulation land is made of plastics.

Compared to existing technology, the utility model beneficial effect is as follows: the utility model has installed heat insulation land additional between motor and the pump housing, because this heat insulation land is to be made by thermal-protective material, therefore, the heat that the utility model work rear engine produces just can not be delivered to the pump housing and then be absorbed by the pump housing, just is difficult for producing bubble in the pump housing.

Description of drawings

Fig. 1 is heat insulation land plan view.

Fig. 2 is heat insulation land rear view.

Fig. 3 is that A-A has omitted part-structure to sectional view among this figure among Fig. 1.

Fig. 4 is the centrifugal water pump structural representation, has assembled heat insulation land among this figure.

Among the figure, 1, housing, 2, the water intake joint, 3, one-way valve, 4, impeller, 5, pump shaft, 6, heat insulation land, the 61, first fixed hole, the 62, second fixed hole, 63, axis hole, 7, the water outlet joint.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

As shown in Figure 4, a kind of centrifugal water pump, comprise the pump housing, housing 1 inside of the described pump housing is chamber, the impeller 4 that this chamber is equipped with pump shaft 5 and is located at pump shaft 5, the pump housing 1 right side is provided with water intake joint 2, is provided with one-way valve 3 at water intake joint 2 ends, and the pump housing 1 top is provided with water outlet joint 7; Also comprise be used to the motor (not shown) that drives described pump shaft 5 rotations; Comprise also that be used to the heat insulation land 6 of isolating described heat of engine it is arranged in pump shaft 5 and affixed with described housing 1.

As Figure 1-3, heat insulation land 6 integral body are rounded, the middle part has axis hole 63, and it is used for passing pump shaft 5, and heat insulation land is fixed on the housing 1 by the first fixed hole 61 and four second fixed holes 62 of annular array in its middle part of four annular arrays in heat insulation land 6 all edges.

More satisfactory for heat insulation land 6 effect of heat insulation, it preferably adopts thermal-protective material to make, and heat insulation land 6 is made of plastics described in the present embodiment.

Except heat insulation land in the present embodiment is fixed on the described housing 1, can also be arranged in pump shaft and be fixed on the engine housing.

Owing to be provided with heat insulation land between motor and the pump housing, therefore, the pump housing just can not be subject to the impact of the heat of motor generation when the centrifugal water pump work, so the cavitation phenomenon because of the too high generation of pump body temperature can not occur.

Explanation is at last, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment the utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims

1. a centrifugal water pump comprises the pump housing, and the described pump housing has housing (1), water intake joint (2), water outlet joint (7), impeller (4), pump shaft (5); And the motor that is used for driving described pump shaft rotation; It is characterized in that, comprise that also be used to the heat insulation land (6) of isolating described heat of engine, it is arranged in pump shaft (5) and affixed with described housing (1) or motor.

2. centrifugal water pump according to claim 1 is characterized in that, described heat insulation land (6) is made of plastics.