CN101334038A

CN101334038A - Mini water pump

Info

Publication number: CN101334038A
Application number: CNA2008100632468A
Authority: CN
Inventors: 杨建忠; 沈丹华
Original assignee: HANGZHOU HUANING ELECTRIC CO Ltd
Current assignee: HANGZHOU HUANING ELECTRIC CO Ltd
Priority date: 2008-07-31
Filing date: 2008-07-31
Publication date: 2008-12-31

Abstract

The invention discloses a micro water pump, which comprises a motor, a casing body, an impeller and an end cover. Outward convex flange and dummy club are arranged on an inner wall of the casing body, a water outlet opening is arranged on the outer wall of the casing body along the tangent direction, a water level hole parallel to the end surface of the casing body and positioned above the water outlet opening is arranged on the circumferential wall of the casing body, and the lower edge of the water level hole is flush with the upper edge of the dummy club; the impeller is composed of an impeller shaft, a chassis and a plurality of blades of an integral structure, the impeller shaft is positioned above the chassis, the blades are uniformly distributed below the chassis, and a plurality of air vents are arranged on the chassis; a cavity is arranged in the end cover, and a central hole is arranged on the end surface of the water pump; the motor, the impeller and the end cover are arranged in the cavity, wherein, a motor shaft is positioned in the impeller shaft and is tightly fitted, the chassis and the blades of the impeller are positioned between the dummy club of the casing body and the end surface of the end cover, and the impeller, the casing body and the end cover are not contacted; the cavities formed among the water outlet opening, the dummy club and the end cover are communicated. The invention has the advantages that the structure is simple, the sealing element is not required, the service life is long, and the noise is low.

Description

A kind of micro pump

Technical field

The present invention relates to a kind of water pump, especially a kind of centrifugal micro pump.

Background technique

Existing micro pump is for preventing in use, water spills between impeller shaft or motor shaft and pump chamber, and motor is intake, need between impeller shaft or motor shaft and water pump cover, seal ring to be set, perhaps motor is installed in the seal chamber, not only parts are more, and complex structure.

As Chinese utility model patent 02272679.9 disclosed " micro pump ", it comprises micromachine, pump seat, pump cover, impeller and seal ring, pump seat is fixed on the motor casing by screw, initiatively magnet ring is fixed on the motor shaft, place pedestal between pump seat and pump cover, be placed with seal ring between pedestal and pump cover, be connected with screw between pump seat and pump cover and pedestal is fixed on the pump seat, place impeller in the space between pedestal and the pump cover, wheel shaft one end is fixed on that the other end stretches to pump cover on the pedestal.This water pump has promptly adopted ring structure, is formed by a plurality of component-assembled, and the friction between the parts can produce noise, and shortens the working life of water pump.

Summary of the invention

Technical problem to be solved by this invention provide a kind of simple in structure, need not Sealing, long service life, micro pump that noise is low.

The present invention addresses the above problem the technological scheme that is adopted: this micro pump comprises motor, housing, impeller and end cap, its structural feature is flange and the boss that the inwall of housing is provided with evagination, the outer wall of housing is provided with water outlet along its tangent direction, on the peripheral wall of housing, have the water level hole parallel with the housing end face, the water level hole is positioned at the water outlet top, and the lower edge in water level hole flushes with the upper limb of boss; Impeller is made up of impeller shaft, chassis and some blades of integrative-structure, and impeller shaft is positioned at the top, chassis, and some blades are distributed in the below on chassis, also have some vents on the chassis; Be provided with cavity in the end cap, and have center hole on its end face; Motor, impeller and end cap are installed in the housing, wherein motor shaft is positioned at impeller shaft and drive fit, the chassis of impeller and blade are between the end face of the boss of housing and end cap, and be contactless between impeller and housing, the end cap, and end cap is fitted in housing below and drive fit; Formed cavity communicates between water outlet and boss and the end cap.

The shape of blade of the present invention can be plane or the curved surface shape.

Motor of the present invention is placed on the flange of inner walls, and drive fit between motor and the flange.

The present invention also can be provided with filter screen in the cavity of end cap.

Blade of the present invention is six, and vent is three.

The present invention compared with prior art has following beneficial effect: 1, structure is extremely simple, except that motor, only is made up of housing, impeller and three parts of end cap, has not only reduced manufacture cost, assemble also very convenient, save time; 2, need not use any Sealing at impeller shaft and pump chamber, realize sealing by the water of impeller top, not have friction between the parts, noise is low, and long service life, and also minimizing thereupon of the power consumption of motor are saved more than 50% than general direct current micro pump power consumption; 3, assembly process is simple, only each parts need be compressed in order to get final product, and has improved efficiency of assembling; 4, be widely used in the place that water pump is is uprightly installed and used, as small household appliances such as facial tissues machine, family's fountain, bathtub, fish jar, dishwasher, the mechanical, electrical thermos flasks of drinking-water.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the embodiment of the invention.

Fig. 2 is the three-dimensional combination figure (broken section) of the embodiment of the invention.

Fig. 3 is the sectional drawing of the embodiment of the invention.

Fig. 4 is the A-A sectional view of Fig. 3.

Fig. 5 is the user mode figure of the embodiment of the invention.

Embodiment

Referring to Fig. 1～Fig. 4, present embodiment comprises motor 1, housing 2, impeller 3 and end cap 4, the inwall of housing 2 is provided with the flange 21 and the boss 22 of evagination, the outer wall of housing 2 is provided with water outlet 23 along its tangent direction, on the peripheral wall of housing 2, have the water level hole 24 parallel with housing 2 end faces, water level hole 24 is positioned at the top of water outlet 23, and the lower edge in water level hole 24 flushes with the upper limb of boss 22, and promptly the upper limb of the lower edge in water level hole 24 and boss 22 is same plane.Impeller 3 is made up of impeller shaft 31, chassis 32 and six blades 33 of integrative-structure, impeller shaft 31 is positioned at 32 tops, chassis, six blades 33 are the center, are distributed in the below on chassis 32 with being aplysia punctata with the center of circle on chassis 32, being shaped as of blade 33 is plane, also has three vents 34 on the chassis 32.Be provided with cavity 42 in the end cap 4, and have center hole 41 on its end face 43.

Motor 1, impeller 3 and end cap 4 are installed in the housing 2.During installation, earlier motor 1 is placed on the flange 21 of housing 2 inwalls, and drive fit between motor 1 and the flange 21, insert in the impeller shaft 31 motor shaft 11 and drive fit then, at last end cap 4 is fitted in housing 2 belows and drive fit, this moment, the chassis 32 of impeller 3 and blade 33 be between the end face 43 of the boss 22 of housing 2 and end cap 4, and no any contact between impeller 3 and housing 2, the end cap 4.Form upper cavity I between motor 1, impeller shaft 31 and the housing 2, form lower chamber II between blade 33, boss 22 and the end face.Water outlet 23 communicates with lower chamber II.

Referring to Fig. 5, during use this water pump is erectly inserted in the water, and water level is set to the position of water level hole 24 half height.Motor 1 is started working, and motor shaft 11 impeller axles 31 rotate, and blade 33 rotates in lower chamber II, and under action of centrifugal force, the water and air of below enters center hole 41 from the cavity 42 of end cap 4, enters lower chamber II again, discharges from water outlet 23 then; The water and air of top enters upper cavity I from water level hole 24 simultaneously, passes through between impeller shaft 31 and boss 22 then, behind vent 34 to lower chamber II, discharges from water outlet 23 again.The water of boss 22 tops has played the effect of sealing like this, and water can not enter motor 1.

The two-dimensional shapes of blade 33 also can be arc involute shape.If needed, also can in the cavity 42 of end cap 4, filter screen be set.

Motor 1 can be selected according to power demand, volume etc., and direct current or interchange all can.

Claims

1, a kind of micro pump, comprise motor, housing, impeller and end cap, it is characterized in that: the inwall of housing is provided with the flange and the boss of evagination, the outer wall of housing is provided with water outlet along its tangent direction, on the peripheral wall of housing, have the water level hole parallel with the housing end face, the water level hole is positioned at the water outlet top, and the lower edge in water level hole flushes with the upper limb of boss; Impeller is made up of impeller shaft, chassis and some blades of integrative-structure, and impeller shaft is positioned at the top, chassis, and some blades are distributed in the below on chassis, also have some vents on the chassis; Be provided with cavity in the end cap, and have center hole on its end face; Motor, impeller and end cap are installed in the housing, wherein motor shaft is positioned at impeller shaft and drive fit, the chassis of impeller and blade are between the end face of the boss of housing and end cap, and be contactless between impeller and housing, the end cap, and end cap is fitted in housing below and drive fit; Formed cavity communicates between water outlet and boss and the end cap.

2, micro pump according to claim 1 is characterized in that: the shape of described blade can be plane or the curved surface shape.

3, micro pump according to claim 1 is characterized in that: described motor is placed on the flange of inner walls, and drive fit between motor and the flange.

4, micro pump according to claim 1 is characterized in that: also filter screen can be set in the cavity of end cap.

5, according to claim 1 or 2 or 3 or 4 described micro pumps, it is characterized in that: described blade is six, and vent is three.