CN2481879Y

CN2481879Y - Multi-stage pump

Info

Publication number: CN2481879Y
Application number: CN 01239509
Authority: CN
Inventors: 李培金; 李晓明
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-22
Filing date: 2001-05-22
Publication date: 2002-03-13
Anticipated expiration: 2011-05-22

Abstract

The utility model discloses a circle-accelerating and spiral current styling multi-stage pump, comprising a front end lid and a back end lid, both of which comprise an inlet opening, an outlet opening and a central hole; the two ends of a central shaft are inserted into the central hole of the front end lid and the back end lid with the aid of bearings. The central shaft is provided with a plurality of pump bodies and has a working fit with the pump bodies. Each pump body has an impeller inside and the impellers are fixed with the central shaft. Both the inside and outside surfaces of the pump body bottom have an arc groove with one communicated end. The blades of the impeller are corresponding to the arc grooves of the pump body bottom. The utility model has the advantages of low production cost, and small space occupation; the utility model is suited to adding water into the vessels like boilers which have pressure requirements.

Description

A kind of multistage pump

The utility model relates to a kind of water pump.Specifically, be the spiral water flow formula multistage pump that a kind of circumference quickens.

At present, be used for the make-up water pump that has the container of pressure requirement to supply water to boiler etc., mostly be the multistage centrifugal pump.Each grade of this multistage centrifugal pump is made of the impeller in the pump housing and the pump housing thereof.During work, current trends is to suck around the central shaft of previous stage, by impeller centrifugal after, spring back to the central shaft of back one-level from pump housing inwall again around.So reciprocal acting after current are quickened step by step and reach required pressure, is sent in the boiler.Use the multistage centrifugal pump, though also can have the container of pressure requirement to add water for boiler etc.But because its acceleration to current is back and forth carried out, promptly water flows to pump housing inwall earlier along the blade of impeller on every side from central shaft, and bounce-back is returned again.So reciprocal acting, the energy that consumes in reciprocal process is more, and in-fighting is big.In addition, make current reach required pressure, not only require the progression of pump to want many, and require the pump housing also to want enough big.The progression more than one of pump, cost of production are just high.And the pump housing one is big, and it is just many to take up room.

The purpose of this utility model is to provide a kind of multistage pump.This pump cost of production is low, occupy little space.

Above-mentioned purpose of the present utility model is realized by following technical solution:

Multistage pump of the present utility model comprises forward and backward end cap, and front and back ends covers entery and delivery port and center hole respectively, the two ends of central shaft by means of the bearing inserting in the center hole of forward and backward end cap.Several pump housings are arranged on the central shaft between the forward and backward end cap, be movable between the pump housing and central shaft and cooperate.Impeller is arranged in the pump housing, fix between this impeller and central shaft.Its structural feature is that the said pump housing is a drum shape, and an arc groove as water channel is all arranged on inside and outside at its bottom, and symmetrical and their end of this two arc groove communicates.Said impeller is circular, and it circumferentially has some blades, and this blade present position is corresponding with the arc groove on the pump housing bottom interior surface.Forward and backward end cap edge is porose, several pump housings and interior impeller thereof by means of this hole, connecting rod and nut sealing between forward and backward end cap.

Adopt above-mentioned technical solution, have the following advantages:

Because all there is an arc groove as water channel the pump housing of the present utility model bottom on the inside and outside surface, this two groove is symmetrical, and their end is connected.Because said impeller is circular, its circumferential blade radial length is corresponding with the arc groove width of pump housing bottom again.During work, the water intake of current from front cover enters the blade of impeller, after the circumference acceleration by impeller, successively by behind the inside and outside lip-deep camber connected in star in pump housing bottom, is sent to the interior continuation of back one-level pump and quickens, and thus current quickened step by step.Changing traditional reciprocating type acceleration is that circumference quickens, and makes water (flow) direction formula in the shape of a spiral, has saved the energy consumption of reciprocal acting, greatly reduces in-fighting, under equal source pressure, can reduce the progression of pump, thereby greatly reduce cost of production.In addition, because in-fighting is little, make the pump housing to do very for a short time, it is also few to take up room.

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

Fig. 1 is a multistage pump cross-sectional schematic of the present utility model;

Fig. 2 is that impeller B among Fig. 1 is to view;

Fig. 3 is that pump housing A among Fig. 1 is to view;

Fig. 4 is the C-C cross-sectional schematic of Fig. 3.

See Fig. 1, multistage pump of the present utility model comprises front cover 14 and rear end cover 13, and this front and back ends covers and is processed with water intake 4 and water outlet 12 and center hole thereof respectively, and the two ends of central shaft 8 are assemblied in the center hole of forward and backward

end cap

14 and 13 by means of bearing.During work, central shaft 8 one ends that stretch out front cover 14 are by the output shaft Joint of a flange 3 with motor.Some pump housings 7 are installed on the central shaft 8 between the forward and backward

end cap

14 and 13, and what of this pump housing require to decide on the pressure to current.A circular impeller 10 is all arranged in each pump housing 7, all be processed with one on the pump housing 7 and the impeller 10 and be convenient to the center hole that cooperates with central shaft 8, and the pump housing 7 is movable with 8 of central shafts and cooperates.For avoiding the water in the pump housing 7 to leak along central shaft 8, in the center hole of each pump housing 7, all process a circumferential recess on the circle, this circumferential recess is embedded with seal ring 5.In the center hole of each impeller 10 circle go up and central shaft 8 cylindricals on the corresponding part all have keyway, the two is circumferentially by key 9 fixes.

See Fig. 3, Fig. 4, the said pump housing 7 is a drum shape, and this two groove is symmetrical with the arc groove 11 of making water channel all to be processed with one on its inside and outside surface, bottom, and their end is connected.

See Fig. 2, said impeller 10 is circular, and it circumferentially is processed with some blades equably.This blade and impeller 10 residing planes are perpendicular or a little angle is arranged, and its cross section can be an arc, also can be triangle, and its radial length is corresponding with the arc groove 11 of the pump housing 7 bottoms.In addition, between 7 of the adjacent pump housings, the previous stage pump housing 7 and the front cover 14, between the afterbody pump housing 7 and the rear end cover 13, seal ring 6 is arranged all.Forward and backward

end cap

14 and 13 diameter are greater than the diameter of the pump housing 7, forward and backward

end cap

14 and 13 circle edge are along locating to be processed with six holes respectively accordingly, by means of this hole, connecting rod 1 and nut 2, the multistage pump housing 7 and impeller 10 thereof closely are fixed between forward and backward

end cap

14 and 13.

During work, the impeller 10 of central shaft 8 and each grade pump of being fixed together with it thereof can rotate under the drive of motor.Meanwhile, water is introduced into from the water intake 4 on the front cover 14 in the impeller 10 of first order pump, and the rotation by this impeller is quickened, and by behind the arc groove 11 on inside and outside of the pump housing 7 bottoms, is admitted in the next stage pump successively.Like this, by the acceleration step by step of multistage pump, the current with certain pressure just are fed to boiler etc. to be had in the container that pressure requires.

Claims

1. a multistage pump comprises forward and backward end cap (14 and 13), and entery and delivery port (4 and 12) and center hole are arranged respectively on the forward and backward end cap (14 and 13), the two ends of central shaft (8) by means of the bearing inserting in the center hole of forward and backward end cap (14 and 13); On the central shaft (8) between the forward and backward end cap (14 and 13) several pump housings (7) are arranged, be movable between the pump housing (7) and central shaft (8) and cooperate; Impeller (10) is arranged in the pump housing (7), and this impeller and central shaft fix between (8); It is characterized in that the said pump housing (7) for drum shape, on inside and outside of its bottom an arc groove (11) as water channel is arranged all, symmetrical and their end of this two arc groove communicates; Said impeller (10) is circular, and it circumferentially has some blades, and this blade present position is corresponding with the arc groove (11) on the pump housing (7) bottom interior surface; Forward and backward end cap (14 and 13) edge is porose, several pump housings (7) and interior impeller (10) thereof by means of this hole, connecting rod (1) and nut (2) sealing between forward and backward end cap (14 and 13).

2. multistage pump according to claim 1, it is characterized in that said blade and impeller (10) middle part the surface between perpendicular.

3. multistage pump according to claim 1, it is characterized in that said blade and impeller (10) middle part the surface between angle is arranged.

4. according to claim 1,2 or 3 described multistage pumps, it is characterized in that said blade profile is an arc.

5. according to claim 1,2 or 3 described multistage pumps, it is characterized in that said blade profile is a triangle.