CN202707506U

CN202707506U - Water pump

Info

Publication number: CN202707506U
Application number: CN 201220344845
Authority: CN
Inventors: 吴永旭; 姜娟; 张永泉; 彭学斌
Original assignee: Shanghai East Pump Group Co Ltd
Current assignee: Shanghai East Pump Group Co Ltd
Priority date: 2012-07-16
Filing date: 2012-07-16
Publication date: 2013-01-30
Anticipated expiration: 2022-07-16

Abstract

The utility model discloses a water pump. The water pump comprises a pump body and an impeller; a clearance is formed between the impeller and the pump body; the tail end of the clearance is communicated with a water inlet; two sides of the tail end of the clearance are respectively served as an end surface of the impeller and an end surface of the pump body; and the end surface of the impeller is arranged parallel to the end surface of the pump body. The water pump is characterized in that the end surface of the impeller is provided with an included angle of 0-90 degrees respect to the water running direction of a water inlet of the water pump; and the end surface of the pump body is provided with an included angle of 0-90 degrees respect to the water running direction of the water inlet of the water pump. According to the water pump, the included angle of the end surface of the impeller respect to the water running direction of the water inlet of the water pump and the included angle of the end surface of the pump body respect to the water running direction of the water inlet of the water pump are changed, so that the water direction of a high pressure water outlet can be changed, the right-angled impacting between the water from the high pressure water outlet and the water from the water inlet can be avoided, and the water can be in the same direction as the water from the water inlet of the water pump, and as a result, the energy loss can be reduced, the cavitation on the pump can be reduced, and the service efficiency of the water pump can be improved.

Description

A kind of water pump

Technical field

The utility model relates to the pump-unit of mechanical field, particularly a kind of water pump.

Background technique

Water pump is the machinery of carrying liquid or making the liquid supercharging, it sends mechanical energy or other external energies of prime mover to liquid, liquid energy is increased, be mainly used to carry liquid to comprise water, oil, acid ﹠ alkali liquid, emulsified liquid, suspended emulsion and liquid metal etc., the liquid that also can carry liquid, gaseous mixture and contain suspended solids.The technical parameter of weighing pump performance has flow, inhales journey, lift, air horsepower, water-horse power, efficient etc.; Can be divided into the types such as volume water pump, vane pump according to different working principles.Displacement pump is to utilize the variation of its swept volume of a single chamber to come transferring energy; Vane pump is to utilize the interaction of rotary vane and water to come transferring energy, and the types such as centrifugal pump, axial-flow pump and mixed flow pump are arranged.

In at present general water pump, cavitation phenomenons often occurs; After cavitation occured, the flow of pump reduced, and vibration strengthens, and affects the normal operation of pump.

Referring to illustrated in figures 1 and 2, in the at present general pump structure, leave gap 30 between impeller 20 and the pump housing 10, the end in gap 30 and water intake are connected, the both sides of gap 30 ends are respectively impeller end face 21 and pump body end surface 11, and impeller end face 21 and pump body end surface 11 be arranged in parallel.

Pump is when work, high pressure water in the chamber can be by the gap 30 between the pump housing 10 and the impeller 20, flow to the low pressure area of the pump housing 10 water intakes, because impeller end face 21 and pump body end surface 11 all are perpendicular to pump intake, high pressure water can become with the current of water intake plumbness to intersect, form eddy current at water intake, off-energy, the efficient of reduction pump.

The model utility content

The technical problems to be solved in the utility model provides a kind of water pump of a kind of operational efficiency that can reduce NPSH, improve pump, the noise and vibration when reducing the pump use.

For achieving the above object, the technical solution of the utility model is as follows:

A kind of water pump comprises the pump housing and impeller, leaves the gap between described impeller and the pump housing, and the end in described gap and water intake are connected, and the both sides of described gap end are respectively impeller end face and pump body end surface, and described impeller end face and pump body end surface be arranged in parallel; Described impeller end face becomes 0-90 ° of angle with the pump intake water (flow) direction, described pump body end surface becomes 0-90 ° of angle with the pump intake water (flow) direction.

Preferably, described impeller end face and pump intake water (flow) direction angle at 45 °.

Preferably, described pump body end surface and pump intake water (flow) direction angle at 45 °.

By technique scheme, the beneficial effects of the utility model are:

The utility model is by changing the setting of impeller end face and pump body end surface and pump intake water (flow) direction angle, thereby the water outlet that has changed high-pressure water flow flows to, the mutually impact that no longer meets at right angles of the water outlet that makes high-pressure water flow and the current of water intake; But identical with the pump intake water (flow) direction; The utility model has reduced the necessary net positive suction head of pump, has improved the operational efficiency of pump, has improved the operation conditions of pump, has reduced noise and vibration.

Description of drawings

In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art, apparently, accompanying drawing in the following describes only is embodiments more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the structural representation of existing water pump;

Fig. 2 is the enlarged view of A among Fig. 1;

Fig. 3 is the structural representation of the utility model water pump;

Fig. 4 is the enlarged view of B among Fig. 3.

Numeral and the represented corresponding part title of letter among the figure:

10, the pump housing 11, pump body end surface 20, impeller 21, impeller end face 30, gap

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.

Referring to Fig. 3 and shown in Figure 4, a kind of water pump of the utility model comprises the pump housing 10 and impeller 20, leave gap 30 between impeller 20 and the pump housing 10, the end in gap 30 and water intake are connected, the both sides of described gap 30 ends are respectively impeller end face 21 and pump body end surface 11, and impeller end face 21 and pump body end surface 11 be arranged in parallel; Impeller end face 21 becomes 0-90 ° of angle with the pump intake water (flow) direction, pump body end surface 11 becomes 0-90 ° of angle with the pump intake water (flow) direction.

Embodiment 1

The utility model impeller end face 21 and pump intake water (flow) direction angle at 45 °, pump body end surface 11 and pump intake water (flow) direction angle at 45 °.

Above-mentioned angle is preferred embodiment of the utility model, and it can also be other angle according to actual needs.

The utility model is when work, high-pressure water flow flows out the water inlet that arrives pump along the gap between the pump housing and the impeller, no longer meet at right angles with the current of water intake and to impact mutually, but to flow to water intake with the roughly the same direction of water intake flow direction, energy loss reduces like this, the cavitation performance of pump improves, and efficient is improved.

Effect after the utility model improves is decided by to leave between impeller end face 21 and pump intake water (flow) direction angle, pump body end surface 11 and pump intake water (flow) direction angle and impeller 20 and the pump housing 10 size in gap 30; Angle is less, and the gap is less, and effect is more obvious.

Angle is in the time of 45 °, and net positive suction head can reduce by one meter, and efficient improves two to three percent points.

More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in above-described embodiment and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a water pump comprises the pump housing and impeller, leaves the gap between described impeller and the pump housing, and the end in described gap and water intake are connected, and the both sides of described gap end are respectively impeller end face and pump body end surface, and described impeller end face and pump body end surface be arranged in parallel; It is characterized in that: described impeller end face becomes 0-90 ° of angle with the pump intake water (flow) direction, and described pump body end surface becomes 0-90 ° of angle with the pump intake water (flow) direction.

2. a kind of water pump according to claim 1 is characterized in that: described impeller end face and pump intake water (flow) direction angle at 45 °.

3. a kind of water pump according to claim 1 is characterized in that: described pump body end surface and pump intake water (flow) direction angle at 45 °.