CN2360650Y

CN2360650Y - Permanent-magnet miniature submersible pump

Info

Publication number: CN2360650Y
Application number: CN 99200552
Authority: CN
Inventors: 张坤
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-01-20
Filing date: 1999-01-20
Publication date: 2000-01-26
Anticipated expiration: 2009-01-20

Abstract

The utility model relates to a permanent-magnet type miniature submersible pump which is provided with a fully plastic pump body, wherein, the fully plastic pump body is sealed in the casting way and has double insulation, a rotor shaft and a permanent-magnet rotor are installed in a rotor cavity of the permanent-magnet type miniature submersible pump, an impeller and an outlet of liquid are arranged in a spiral casing which is connected with the pump body, and a stator coil and a stator silicon steel sheet group are arranged in one insulating cast body. The utility model is characterized in that two symmetrical and magnetically saturated notches are arranged on an inner groove of the stator silicon steel sheet group; the stator coil can be in the structure that two coils are connected in parallel or in series. One flow guiding groove is arranged in the rotor cavity of the pump body. Therefore, the permanent-magnet rotor is not demagnetized any more, and the running noise is reduced.

Description

The permanent magnetism miniature immersible pump

The utility model relates to a kind of permanent magnetism miniature immersible pump, and it belongs to as the coolant pump of industry equipment and liquid circulation pump.

Employed in the prior art permanent magnetism miniature immersible pump has the pump housing and the cast encapsulation of all-plastic, can double insulation, and its rotor adopts high performance permanent-magnet material.But it exists some common shortcomings, i.e. the rotor made of the permanent-magnet material of this kind submersible pump demagnetization easily in use causes the rotor torque deficiency, and rotating speed descends, and the flow of outlet liquid reduces, and lift reduces; Because its stator coil is a single coil structure, the starting torque deficiency of water pump, because current density is bigger, heat distributes bad and causes burning simultaneously; On the other hand, submersible pump noise in the running is bigger, and this is to cause owing to the flowing state of liquid in rotor chamber is bad.At above-mentioned shortcoming, the utility model has been proposed.

The purpose of this utility model is: a kind of permanent magnetism miniature immersible pump is provided, and it has overcome above-mentioned shortcoming, can make the unlikely increase under high voltage of effective magnetic field intensity excessive and cause p-m rotor demagnetization; Two coil configuration has increased starting torque, has reduced current density, has reduced heat, has guaranteed safe handling; Simultaneously also reduced to cause the eddy current of noise effectively.

The technical solution of the utility model is: be provided with a pump housing and a spiral case that is attached thereto, end at spiral case is the delivery outlet of liquid, the rotor that rotor shaft is housed in the rotor chamber of the pump housing and adopts high performance permanent magnetic materials to make, impeller is equipped with on top at rotor shaft, and it is positioned at spiral case; The pour mass that an insulation is arranged in the pump housing wherein is provided with stator coil, in the periphery of stator coil, is provided with stator silicon steel plate group, below stator coil, is provided with cable and communicates with power supply; On the inside groove of described stator silicon steel plate group, have the magnetic saturation breach of two symmetries; Described stator coil can be a two coil configuration in parallel, also can be the two coil configuration of series connection; In the rotor chamber of the pump housing, have a guiding gutter that is used to reduce eddy current.Advantage of the present utility model is:

1, p-m rotor no longer demagnetizes, and makes rotor torque, rotating speed, liquid outlet flow and lift keep stable, thereby has improved working efficiency.

2, increased starting torque, reduced current density, reduced heat, guaranteed safe handling.

3, improved the flowing state of liquid in the rotor chamber, reduced eddy current, the noise when having reduced running, thus improved working life.

Consulting accompanying drawing below elaborates to embodiment of the present utility model:

Fig. 1 is a structural representation of the present utility model

Fig. 2 is the schematic top plan view of Fig. 1 middle pump body

Fig. 3 is the top plan view shape schematic representation of stator silicon steel plate group

Fig. 4 is the schematic representation of twin coil in parallel for stator coil

Fig. 5 is the schematic representation of series connection twin coil for stator coil

As shown in the figure: the permanent magnetism miniature immersible pump is by all-plastic pump housing cast encapsulation, double insulation, comprise a pump housing 1 and the spiral case 2 that is attached thereto, in the rotor chamber 3 in the pump housing 1, the rotor 5 that rotor shaft 4 is housed and makes with high performance permanent magnetic materials, be provided with impeller 6 on the top of rotor shaft 4, impeller 6 is positioned at spiral case 2, and an end of spiral case 2 is outlets of liquid; Be provided with stator coil 7 in the pump housing 1, stator coil 7 can be a two coil configuration in parallel, also can be the two coil configuration of series connection, is provided with stator silicon steel plate group 8 in its periphery, and the two all places the pour mass 9 of insulation; Below stator coil 7, be provided with cable and communicate with power supply; Open the magnetic saturation breach 11 of two symmetries on the inside groove of described stator silicon steel plate group 8, in the rotor chamber 3 of the pump housing 1, have a guiding gutter 12,, improve the flowing state of liquid in order to reduce the eddy current of liquid.Respectively be provided with an axle sleeve 13 at the two ends of rotor shaft 4, joint at the pump housing 1 and spiral case 2 is provided with a seal ring 14, one pad 15 is housed between rotor 5 and spiral case 2, side at the pump housing 1 is connected with a fixed plate 17 with some screws 16, is provided with some holes that are used for fixing the pump housing on fixed plate 17; In the bottom of the pump housing 1 base plate 18 is housed, it is connected with the pump housing with two elasticity cards with two screws.

The working principle of permanent magnetism miniature immersible pump is as follows: after it and power supply are opened, in stator coil 7, produce alternating magnetic field, 5 rotations of field drives p-m rotor, rotor 5 drive coaxial impeller 6 and rotate together, and liquid outlet from spiral case one end under the effect of the rotary centrifugal force of impeller 6 is exported.

Claims

1, a kind of permanent magnetism miniature immersible pump, comprise a pump housing and a spiral case that is attached thereto, end at spiral case is the outlet of liquid, in the rotor chamber in the pump housing, the rotor that rotor shaft is housed and makes with high performance permanent magnetic materials, top at rotor shaft is provided with impeller, it is positioned at spiral case, in the pump housing, be provided with stator coil, be provided with stator silicon steel plate group in the periphery of stator coil, the two all places the pour mass of insulation, is provided with cable and communicates with power supply below stator coil, it is characterized in that:

On the inside groove of described stator silicon steel plate group (8), have the magnetic saturation breach (11) of two symmetries; The stator coil of stating (7) can be a twin coil line structure in parallel, also can be the two coil configuration of series connection; In the rotor chamber (3) of the pump housing (1), have a guiding gutter (12).