CN218325450U

CN218325450U - Low-specific-speed single-stage double-suction centrifugal pump with long and short blade composite impeller

Info

Publication number: CN218325450U
Application number: CN202222362781.1U
Authority: CN
Inventors: 从宝义; 尹吉才
Original assignee: Hefei Kaiquan Motor Pump Co ltd
Current assignee: Hefei Kaiquan Motor Pump Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-01-17
Anticipated expiration: 2032-09-06

Abstract

The utility model discloses a take low specific speed single-stage double entry centrifugal pump of long and short blade composite impeller, including the pump body, there is the axle at pump body internally mounted, and the both ends of axle are respectively through a left side, right bearing part installs inside the pump body, and the mid-mounting that is located the axle inside the pump body has impeller body, is fixed with the long blade and the short blade that a plurality of intervals set up on impeller body, and the left and right sides that is located impeller body inside the pump body is equipped with the suction chamber respectively, is equipped with the extrusion chamber in impeller body's the outside, still is equipped with import and export on the pump body. The utility model discloses weld short blade between adjacent long blade, liquid gets into the extrusion room through short blade reposition of redundant personnel from the impeller export, under the condition that does not influence water pump cavitation performance, stabilizes the impeller export liquid flow state, prevents the production and the development of desludging, improves the water pump performance, can improve more than 20% of pump lift, efficiency remove at a large-traffic and improve more than 12%.

Description

Low specific speed single-stage double-suction centrifugal pump with long and short blade composite impeller

Technical Field

The utility model relates to a pump class product technical field especially relates to a low specific speed single-stage double entry centrifugal pump that is used for carrying the compound impeller of long short blade of area of liquid.

Background

The centrifugal pump with low specific speed is a general mechanical equipment widely used in the fields of agricultural irrigation and drainage, urban water supply, boiler water supply, mine, petroleum and chemical industry, etc. the centrifugal pump has low specific speed and low efficiency, so that it has high power consumption. Although the efficiency of the existing low-specific-speed centrifugal pump can be improved, the impeller flow channel is seriously diffused, so that the hydraulic performance is reduced, and the lift and the efficiency of a water pump are low; the pump lift and the efficiency of the water pump are used as important technical and economic indexes for measuring the working efficiency, the pump lift and the efficiency of the water pump are improved, the energy consumption can be effectively reduced, and the purposes of energy conservation and emission reduction are achieved.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a take low specific speed single-stage double suction centrifugal pump of compound impeller of length blade in order to compensate prior art impeller runner diffusion serious, result in hydraulic performance decline, water pump lift, defect of inefficiency.

The utility model discloses a realize through following technical scheme:

the utility model provides a take low specific speed single-stage double entry centrifugal pump of long and short blade composite impeller, including the pump body, at pump body internally mounted has the axle, the both ends of axle install inside the pump body through left and right bearing part respectively, the mid-mounting that is located the axle in the pump body has impeller body, is fixed with the long blade and the short blade that a plurality of intervals set up on impeller body, is equipped with the suction chamber respectively in the inside left and right sides that is located impeller body of the pump body, is equipped with the extrusion chamber in impeller body's the outside, still is equipped with import and export on the pump body.

The outer surface of the shaft is sleeved with a mechanical seal shaft sleeve, and a mechanical seal body and a mechanical seal gland are arranged on the shaft.

Bearing retaining sleeves are respectively arranged on the shaft close to the left bearing part and the right bearing part.

And the left side and the right side of the impeller body are respectively provided with a sealing ring.

The mechanical sealing body is connected with a mechanical sealing washing water return pipe.

The utility model has the advantages that: the utility model discloses weld short blade between the adjacent long blade of impeller, liquid gets into the extrusion chamber through short blade reposition of redundant personnel from the impeller export, through short blade reposition of redundant personnel, under the condition that does not influence water pump cavitation performance, make impeller export and extrusion chamber entry pressure, speed evenly distributed, stabilize impeller export liquid flow state, prevent the production and the development of desludging, improve the water pump performance, reduce the pressure pulsation, reduce the energy consumption because of unstable liquid stream produces, thereby improve water pump lift and efficiency.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic view of the impeller structure of the present invention;

fig. 4 is a sectional view of the impeller of the present invention;

fig. 5 is a working principle diagram of the present invention.

Detailed Description

As shown in fig. 1-4, a low specific speed single-stage double-suction centrifugal pump with a long and short blade composite impeller comprises a pump body 1, a pump cover 2 is further arranged outside the pump body 1, a shaft 3 is arranged inside the pump body 1, two ends of the shaft 3 are respectively arranged inside the pump body 1 through a left bearing part and a right bearing part 4, and 5, an impeller body 6 is arranged in the middle of the shaft 3 inside the pump body 1, a plurality of long blades 7 and short blades 8 which are arranged at intervals are fixed on the impeller body 6, suction chambers 9 are respectively arranged on the left side and the right side of the impeller body 6 inside the pump body 1, an extrusion chamber 10 is arranged on the outer side of the impeller body 6, and an inlet 11 and an outlet 12 are further arranged on the pump body 1. A mechanical seal bush 13 is fitted over the outer surface of the shaft 3, and a mechanical seal 14 and a mechanical seal cover 15 are fitted to the shaft 3.

Bearing collars 16 are provided on the shaft 3 adjacent the left and right bearing members 4, 5, respectively.

Seal rings 17 are provided on the left and right sides of the impeller body 6.

The mechanical seal 14 is connected with a mechanical seal washing water return pipe 18, and cooling and washing of the mechanical seal are achieved through the mechanical seal washing water return pipe, so that normal use of the mechanical seal is guaranteed.

As shown in fig. 5, the impeller body 6, the mechanical seal shaft sleeve 13, and the bearing retaining sleeve 16 are mounted on the shaft 3 to form a rotor component, the rotor component is fixed and supported in the pump body 1 through the left and right bearing bodies 4 and 5, and the whole pump ensures the sealing performance inside the pump through the sealing ring 17 and the mechanical sealing body 14. The prime motor drives the rotor part to rotate, and after entering the impeller body 6, the liquid is divided by the long and short blades 7 and 8 and does work, and then uniformly and stably enters the water pumping chamber 10 to increase the energy of the liquid, so that the mechanical energy of the prime motor is converted into the energy of the liquid. The utility model discloses can prevent the production and the development of taking off the stream, improve the water pump performance, reduce pressure pulsation, reduce the energy consumption because of unstable liquid stream produces to improve more than 20% of pump lift, efficiency and remove at a large-traffic and improve more than 12%.

Claims

1. The utility model provides a take low specific speed single-stage double entry centrifugal pump of long and short blade composite impeller which characterized in that: including the pump body, at pump body internally mounted have the axle, the both ends of axle install inside the pump body through left and right bearing part respectively, the mid-mounting that is located the axle inside the pump body has an impeller body, be fixed with long blade and the short blade that a plurality of intervals set up on impeller body, be equipped with the suction chamber respectively in the inside left and right sides that is located impeller body of the pump body, be equipped with the extrusion chamber in impeller body's the outside, still be equipped with import and export on the pump body.

2. The low specific speed single-stage double suction centrifugal pump with the long and short blade composite impeller of claim 1 is characterized in that: the outer surface of the shaft is sleeved with a mechanical seal shaft sleeve, and a mechanical seal body and a mechanical seal gland are arranged on the shaft.

3. The low specific speed single-stage double suction centrifugal pump with the long and short blade composite impeller according to claim 1, characterized in that: bearing retaining sleeves are respectively arranged on the shaft close to the left bearing part and the right bearing part.

4. The low specific speed single-stage double suction centrifugal pump with the long and short blade composite impeller according to claim 1, characterized in that: and the left side and the right side of the impeller body are respectively provided with a sealing ring.

5. The low specific speed single-stage double suction centrifugal pump with the long and short blade composite impeller according to claim 2, characterized in that: the mechanical sealing body is connected with a mechanical sealing washing water return pipe.