CN2716548Y

CN2716548Y - Centrifugal pump

Info

Publication number: CN2716548Y
Application number: CN 200420023885
Authority: CN
Inventors: 苏道忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-06-18
Filing date: 2004-06-18
Publication date: 2005-08-10
Anticipated expiration: 2014-06-18

Abstract

The utility model relates to a centrifugal pump. The difference with the common centrifugal pump is that a plurality of long blades and short blades are arranged on the vane wheel of the centrifugal pump at intervals, the number of the long blade and the number the short blade are same, and the exit angle of each blade is a right angle. The inner part of the pump body is provided with a spiral case body pressure water pipe which is used for containing the vane wheel. When the centrifugal pump is in the change from the zero quantity of flow to the maximum extent needed, the change of the pressure is very small. The centrifugal pump does not exceed the pressure in the small quantity of flow or the zero quantity of flow. The problem that the pressure oscillation is big when the quantity of flow changes in the fire water supply process and the centrifugal pump does not exceed the pressure in the small quantity of flow is effectively solved. The safety of the fire fighting system and the operator can be ensured, and the fire extinguishing efficiency is improved. The centrifugal pump has the advantages of stable operation, long service life, etc.

Description

Centrifugal pump

Technical field

The utility model relates to a kind of centrifugal pump.

Background technique

Centrifugal pump of many uses, some is mainly used in industry and the fixedly feedwater of fire-fighting system (fire hydrant suppression system, automatic spray fire extinguishing and water spray fire extinguish system) of civil building, especially is applicable to the pressure source of tall building subregion fire supply system.There is following shortcoming in existing fire-fighting with centrifugal pump: in the fire supply process, when changes in flow rate pressure surge big, and when small flow serious superpressure, being difficult to guarantee fire-fighting system and operator's safety also can influence fire-fighting efficiency simultaneously.Certainly the problems referred to above can be used the flow and the pressure of control pumps such as automation frequency conversion, but this can bring the other deficiency, cost as control gear is higher, the a lot of occasions of centrifugal pump are to answer acute use, this just is difficult to guarantee with the electronic device to be that the main frequency-converting control device that constitutes is in suitable state always, if any the expense of fault or maintenance and repair than problems such as height.

The model utility content

The utility model purpose provides a kind of centrifugal pump of unsteady flow voltage stabilizing.

For reaching above-mentioned purpose, centrifugal pump of the present utility model, comprise the pump housing, motor, impeller, impeller shaft, the described pump housing is provided with liquid entering hole and liquid outlet, described impeller is fixed on the impeller shaft, it is characterized in that: described impeller is provided with some spaced apart linear leafs and short blade, and described long and short lobe numbers is identical, and the exit angle of described each blade is the right angle; Be formed with the volute body pressure supply water pipe of ccontaining described impeller in the described pump housing.

Adopt the centrifugal pump of said structure, when in required maximum magnitude, changing from zero delivery, its variation in pressure is very little, and when small flow or zero delivery superpressure not, the problem of superpressure not during the big and small flow of pressure surge when efficiently solving in the fire supply process changes in flow rate, guarantee fire-fighting system and operator's safety, improved fire-fighting efficiency, have advantages such as running is steady, long service life.

For further specifying above-mentioned purpose of the present utility model, structural feature and effect, the utility model is described in detail below with reference to accompanying drawing.

Description of drawings

Fig. 1 is the main sectional view of the utility model centrifugal pump.

Fig. 2 is the structural representation of the pump housing band volute body pressure supply water pipe of centrifugal pump.

Fig. 3 is the plane structure schematic representation of the impeller among Fig. 1.

Fig. 4 is the schematic cross-section of the impeller among Fig. 1.

Embodiment

As shown in Figure 1, centrifugal pump of the present utility model is a horizontal type structure, and the pump housing 2 is connected with support 12, and support 12 is connected with motor 15, and the motor shaft 14 of motor 15 connects as one by axle sleeve 13 and impeller shaft 11.Impeller 4 is fixed on the impeller shaft 11, linear leaf 18 on the impeller 4 and short blade 19 are provided with (as shown in Figure 3) at interval, the deviated splitter vane number is identical, the area of each blade is bigger, near a rectangle, general deviated splitter vane each with 6 to 8 all can, the exit angle α of blade is the right angle, above-mentioned impeller 4, linear leaf 18, short blade 19 can integral casting forming.The equalizing orifice 20 (as shown in Figure 4) that impeller 4 both sides are provided with seal ring 6 and are used for automatically balancing axial force.

Figure 2 shows that the inner chamber that the pump housing 2 ccontaining impellers 4 form, promptly the volute body pressure supply water pipe 5.The cavity that the utility model centrifugal pump forms at impeller 4 promptly forms pressure and eddy flow in the volute body pressure supply water pipe 5, and water or other liquid form in this volute body pressure supply water pipe 5 at a high speed, in order to avoid produce excess pressure when small flow.Outlet pressure maximum of the present utility model can reach 2.6Mpa, also is fit to tall building and uses.

Pump cover 7 inner chambers that match with support 12 form seal chamber 8, realize common seal action by adopting mechanical seal 9 and felt collar 10, have sealing reliably, leak free characteristics.The pump housing 2 and motor 15 are fixed on the base 16 jointly, are convenient to install, and increase the stability of pump operation.The working principle of the utility model centrifugal pump will be described below.

Motor 15 rotates and drives motor shaft sleeve 13 rotations, motor shaft sleeve 13 connects as one with impeller shaft 11, so impeller shaft 11 is along with motor shaft sleeve 13 rotates together, impeller 4 is fixed on the impeller shaft 11, impeller 4 is rotation thereupon also, because the rotation of impeller 4, the feasible liquid that is flowed into by the liquid entering hole 1 of the pump housing 2 is rotated under the drive of impeller 4, and in the volute body pressure supply water pipe 5 that impeller 4 forms, form pressure and eddy flow, liquid forms in this volute body pressure supply water pipe 5 at a high speed, under the effect of impeller 4, the original kinetic energy of liquid is converted into potential energy, flow out by the liquid outlet on the pump housing 23.

According to aforesaid centrifugal pump of the present utility model, when in required maximum magnitude, changing from zero delivery, its variation in pressure very little (in 5%), and when small flow or zero delivery superpressure not, the problem of superpressure not during the big and small flow of pressure surge when efficiently solving in the fire supply process changes in flow rate, guarantee fire-fighting system and operator's safety, improved fire-fighting efficiency, guarantee trouble-free use.The utility model centrifugal pump both can be used for fixedly fire-fighting system of industry and civil building, can be used for the shared water supply system of fire demand and living again, also can be used for occasions such as building, municipal administration, industrial and mineral and boiler feed water, in addition, the medium that can also be used to carry the water purification that do not contain solid particle or physicochemical properties to be similar to water.The utility model is simple in structure, volume is little, in light weight, easy for installation, long service life, running steadily, use easy to maintenancely, be particularly suitable for emergent the use.

Though the utility model is described with reference to current specific embodiment, but those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, under the situation that does not break away from the utility model spirit, also can make the variation or the replacement of various equivalences, therefore, as long as in connotation scope of the present utility model in the scope to the variation of the foregoing description, claims that modification all will drop on the application.

Claims

1. centrifugal pump, comprise the pump housing, motor, impeller, impeller shaft, the described pump housing is provided with liquid entering hole and liquid outlet, described impeller is fixed on the impeller shaft, it is characterized in that: described impeller is provided with some spaced apart linear leafs and short blade, described long and short lobe numbers is identical, and the exit angle of described each blade is the right angle; Be formed with the volute body pressure supply water pipe of ccontaining described impeller in the described pump housing.

2. centrifugal pump as claimed in claim 1 is characterized in that: described impeller, linear leaf and short blade are formed in one.

3. centrifugal pump as claimed in claim 1 is characterized in that: described impeller both sides are provided with seal ring and equalizing orifice.