KR101687165B1

KR101687165B1 - submerged pump

Info

Publication number: KR101687165B1
Application number: KR1020150046652A
Authority: KR
Inventors: 탁동열
Original assignee: 영신중공업 주식회사; 탁동열
Priority date: 2015-04-02
Filing date: 2015-04-02
Publication date: 2016-12-16
Also published as: KR20160118484A

Abstract

The present invention is characterized in that, for high lift, two impellers are fixedly circumscribed to a rotation shaft of a motor and provided in the pump chamber, a plurality of first flow paths spaced apart in a circumferential direction are formed between the two impellers, The impeller caused by the first impeller is broken by the first flow path and the impeller caused by the second impeller is blown by the second impeller by forming a plurality of second flow paths which are spaced apart in the circumferential direction at a predetermined interval between the impeller adjacent to the discharge side and the motor means. Can be prevented by the second flow path so as to prevent the noise and vibration of the underwater pump without deteriorating the pumping capacity.

Description

Submerged pump

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a submersible pump, and more particularly to a submersible pump of a lifting pump.

Submersible pump refers to the pump that is used in the water for the motor.

Such an underwater pump includes a pump casing having a suction portion, a pump chamber and a discharge portion, and motor means integrally fixed to the pump casing and operated to rotate an impeller provided in the pump chamber, as disclosed in Korean Patent Laid-Open Publication No. 1997-6916 .

Such an underwater pump is required to rotate the impeller at high speed in order to have the capability of lifting the high lift, but it is limited to perform high lift with only one impeller.

In order to overcome these limitations, two impellers can be fixedly circumscribed to the rotation axis of the motor to be provided in the pump chamber. However, the discharged water discharged from the impeller is discharged to the outside of the pump casing via a discharge channel in which the inlet / The discharged water has a vortex, which lowers the ampholytic ability and causes noise and vibration of the underwater pump.

This convergence has a problem in solving the above problems.

The present invention is characterized in that, for high lift, two impellers are fixedly circumscribed to a rotation shaft of a motor and provided in the pump chamber, a plurality of first flow paths spaced apart in a circumferential direction are formed between the two impellers, The above-described problems can be solved by forming a plurality of second flow paths spaced apart in the circumferential direction between the impeller adjacent to the discharge side and the motor means.

According to the above-mentioned problem, the vortex caused by the first impeller is broken by the first flow path, the vortex caused by the second impeller is broken by the second flow path, It is possible to prevent noise and vibration of the underwater pump.

1 is a sectional view of an underwater pump of an embodiment according to the present invention;

Hereinafter, the submersible pump of the embodiment according to the present invention will be described in detail with reference to Fig.

In Fig. 1, the submersible pump of this embodiment is indicated by reference numeral 100. Fig.

The submersible pump 100 includes a motor housing 16 and an impeller housing 2 detachably mounted on the lower end of the motor housing 16.

A motor case 15 is housed in the motor housing 15 and a pump shaft 26 extending over both the motor case 15 and the impeller housing 2 is provided in the motor case 15. A rotor 13 fixedly circumscribed to the pump shaft 26 is rotatably mounted and the stator 14 is fixedly inscribed in the motor case 15.

The motor case 15 is disposed between the motor housing 16 and the motor case 15 at a predetermined interval in the circumferential direction of the pump shaft 26, And a plurality of first guide flow paths 36 extending over the first guide flow path 36 are formed.

A strainer 1 for filtering foreign substances is mounted on the lower end of the impeller housing 2 and a pump chamber 17 in which the pump shaft 26 extends is provided in the impeller housing 2.

A pair of impellers 4 and 7 spaced apart in the axial direction of the pump shaft 26 and fixedly circumscribed to the pump shaft 26 are rotatably installed in the pump chamber 17.

A plurality of second guide flow passages 5 extending in the axial direction of the pump shaft 26 and spaced apart from each other in the circumferential direction of the pump shaft 26 are provided between the pair of impellers 4, Respectively.

The upstream ends of the plurality of first guide channels 36 communicate with the inner space of a portion of the pump chamber 17 in which the impeller 7 located at the upper portion of the pair of impellers 4 and 7 is housed , And the downstream end thereof flows through a converging / discharging pipe (35) detachably mounted on the upper end of the motor housing (16).

The submersible pump constructed as described above can be operated as follows.

When the pump shaft 26 of the motor is rotated, the pair of impellers 4 and 7 are also rotated, so that the velocity of the internal space of the pump chamber 17 is increased and the pressure is lowered.

The water outside the underwater pump 100 flows into the pump chamber 17 via the strut 1 so that the impeller 4 and the impeller 4 are forced to swirl by the rotational force of the lower impeller 4, So as to enter the plurality of second guide channels 5.

The water of the vortex entering the plurality of second guide passages 5 passes through the upper impeller 7 while the vortex is broken by the plurality of second guide passages 5 extending at right angles to the vortex direction, The water passing through the upper impeller 7 enters the plurality of first guide passages 36 while forcibly forming a vortex by the rotational force of the upper impeller 7. [

The vortex water entering the plurality of first guide passages 36 is broken by the plurality of first guide passages 36 extending at right angles to the vortex direction so that the plurality of first guide passages 36 And is supplied to a source to be fed (not shown) through the converging / discharging pipe 35.

Therefore, in the submersible pump of the embodiment, the vortex caused by the first impeller is broken by the plurality of first flow paths, and the vortex caused by the second impeller is broken by the plurality of second flow paths, It is possible to prevent the noise and vibration of the underwater pump without deteriorating.

36; A first guide passage 5; The second guide channel

Claims

An underwater pump (100) comprising a motor housing (16) and an impeller housing (2) detachably mounted on the lower end of the motor housing (16)
The motor housing 15 is housed in the motor housing 16,
A pump shaft 26 extending over both the motor case 15 and the impeller housing 2 and a rotor 13 fixedly circumscribed to the pump shaft 26 are provided in the motor case 15 And the stator 14 is fixedly inscribed in the motor case 15,
The motor case 15 is disposed between the motor housing 16 and the motor case 15 at a predetermined interval in the circumferential direction of the pump shaft 26, A plurality of first guide flow passages 36 extending in the longitudinal direction are formed,
In the impeller housing 2, a pump chamber 17 in which the pump shaft 26 extends is provided,
A pair of impellers (4, 7) spaced in the axial direction of the pump shaft (26) and fixedly circumscribed to the pump shaft (26) are rotatably installed in the pump chamber (17)
A plurality of second guide flow passages 5 extending in the axial direction of the pump shaft 26 and spaced apart from each other in the circumferential direction of the pump shaft 26 are provided between the pair of impellers 4, Wherein the pump is provided with a pump.

The method according to claim 1,
The upstream ends of the plurality of first guide channels 36 communicate with the inner space of a portion of the pump chamber 17 in which the impeller 7 located at the upper portion of the pair of impellers 4 and 7 is housed , And a downstream end thereof communicates with a converging / discharging pipe (35) detachably mounted on the upper end of the motor housing (16).

3. The method of claim 2,
And a strainer (1) for filtering out foreign matter is mounted on the lower end of the impeller housing (2).