CN200952475Y

CN200952475Y - Horizontal multistage pump

Info

Publication number: CN200952475Y
Application number: CN 200620044989
Authority: CN
Inventors: 李震昙; 谢张国
Original assignee: Shanghai Liancheng Group Co Ltd
Current assignee: Shanghai Liancheng Group Co Ltd
Priority date: 2006-08-21
Filing date: 2006-08-21
Publication date: 2007-09-26
Anticipated expiration: 2016-08-21

Abstract

A horizontal multi-stage pump relates to a centrifugal pump, which is to increase the reliability of the horizontal multi-stage pump. The technical project of the utility model is that the pump comprise a pump shaft, bearing accessories, a sealing mechanism, an impeller, a guide vane, water inlet section, a water outlet section and a middle section of the pump case, the utility model is characterized by that the lateral back plate of the impeller is provided with an equalizing hole and sealing ring, a deep groove ball bearing used on the outer bearing accessories of the low pressure sealing mechanism, a water lubricated bearing arranged on the axle hole of the water outlet, a bottom sealing applied on the bottom of water outlet. The utility model is used in the horizontal multi-stage pump.

Description

A kind of horizontal type multi-stage pump

Technical field:

The utility model relates to centrifugal pump, especially horizontal multi-stage centrifugal pump.

Background technique

Existing centrifugal pump mainly is made up of impeller, pump shaft, pump case, impeller is made of the disk of several recurvate leaf lobes and both sides, the wheel hub of impeller links to each other with the pump shaft assembling with key, pump shaft one end stretches out pump case by Stuffing box, rotate by prime mover driven, the center of pump case connects suction connection, the outlet of the pump case adapter of running in.Horizontal type multi-stage pump has a plurality of impellers and stator, pump shaft one end stretches out pump case dress shaft coupling by sealing mechanism and bearing part, the pump case of horizontal type multi-stage pump is made of inlet segment, water exit end and stage casing assembling, inlet segment one side dress low voltage side sealing mechanism, water exit end one side dress high pressure side sealing mechanism, the outside of sealing mechanism is equipped with bearing part, and sealing mechanism inboard, high pressure side is provided with the balanced controls that Balance disc or balancing drum add the Balance disc structure.But the wearing and tearing of Balance disc and gimbal take place in balanced controls easily, and serious have a scuffing, influences operational reliability; Also there is the problem of high pressure side sealing difficulty in horizontal type multi-stage pump.

The model utility content

The purpose of this utility model is to solve the defective that horizontal type multi-stage pump exists, and improves the reliability of horizontal type multi-stage pump.

The technical solution of the utility model comprises pump shaft, bearing part, sealing mechanism, impeller, stator, pump case inlet segment, water exit end, stage casing, the dorsal plate that it is characterized in that impeller is shaped on equalizing orifice and seal ring, the bearing part in the low voltage side sealing mechanism outside adopts deep groove ball bearing, adorn water lubriucated bearing in the axis hole of water exit end, end bracket enclosed is equipped with in the end of water exit end.

The utility model is owing to adopted equalizing orifice and seal ring structure on impeller, the end thrust of ballast pump, bearing part in the low voltage side sealing mechanism outside adopts deep groove ball bearing, the effect of the residual axial force of bearing is arranged, water lubriucated bearing is set on water exit end, water lubriucated bearing is with the deep groove ball bearing bearing radial force, end bracket enclosed is equipped with in end at water exit end, the high pressure side pump shaft does not stretch out water exit end, thereby simplify and removed high pressure Side sealing mechanism, the high pressure side gear mechanism, balanced controls, not only improve the horizontal type multi-stage pump reliability of operation, solved the problem of high pressure side sealing difficulty, and simple in structure, make the manufacture cost of pump descend about 10%.

Description of drawings

Fig. 1 is an assembly structure figure of the present utility model.

Fig. 2 is the impeller sectional arrangement drawing.

Fig. 3 is the schematic representation that the impeller dorsal part is laid equalizing orifice.

Fig. 4 is the water lubriucated bearing sectional arrangement drawing.

Fig. 5 is the left view of Fig. 4.

Embodiment

The utility model (Fig. 1) is on existing horizontal multi-stage pump foundation, adopt pump shaft 1, bearing part 4, sealing mechanism 5, impeller 2, stator 3, pump case inlet segment 8, water exit end 6, stage casing 9, removed high pressure Side Stuffing box sealing mechanism, the high pressure side gear mechanism, balanced controls, and be shaped on equalizing orifice and seal ring (Fig. 2) at the dorsal part of impeller 2, equalizing orifice is distributed on the dorsal part (Fig. 3) of impeller, seal ring is concentric with the impeller axis hole, the bearing part 4 in the low voltage side sealing mechanism outside adopts deep groove ball bearing, dress water lubriucated bearing 7 in the axis hole of water exit end, the uniform lubrication groove of water lubriucated bearing inner hole wall (Fig. 5), the end of water exit end are equipped with end cap 10 sealings.

Claims

1, a kind of horizontal type multi-stage pump, comprise pump shaft, bearing part, sealing mechanism, impeller, stator, pump case inlet segment, water exit end, stage casing, the dorsal plate that it is characterized in that impeller is shaped on equalizing orifice and seal ring, the bearing part in the low voltage side sealing mechanism outside adopts deep groove ball bearing, adorn water lubriucated bearing in the axis hole of water exit end, end bracket enclosed is equipped with in the end of water exit end.