CN215890582U

CN215890582U - Horizontal two-stage low-cavitation high-flow centrifugal pump

Info

Publication number: CN215890582U
Application number: CN202122121729.2U
Authority: CN
Inventors: 徐秀生; 陈修藤
Original assignee: Shanghai Liancheng Group Dalian Chemical Pump Manufacturing Co ltd
Current assignee: Shanghai Liancheng Group Dalian Chemical Pump Manufacturing Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-02-22
Anticipated expiration: 2031-09-03

Abstract

The utility model discloses a horizontal two-stage low-cavitation high-flow centrifugal pump, which comprises a pump body, wherein one end of the pump body is fixedly provided with a suction section, the other end of the pump body is fixedly provided with a pump cover, a shaft is arranged in the pump body, a primary impeller and a secondary impeller are fixedly sleeved on the shaft, a fixing bolt is screwed at one end of the primary impeller in one end of the shaft, a guide vane is arranged in the pump body and outside the primary impeller, one end of the guide vane is fixedly connected with one end of the suction section, a rear cover is arranged in the pump body and outside the secondary impeller, one end of the rear cover is fixedly connected with the other end of the guide vane, the utility model relates to the technical field of centrifugal pumps, the device has compact structure, adopts the design of series impellers, solves the problems of reducing cavitation allowance, improving lift, improving efficiency, using stability and reducing manufacturing cost, brings convenience to people.

Description

Horizontal two-stage low-cavitation high-flow centrifugal pump

Technical Field

The utility model relates to the technical field of centrifugal pumps, in particular to a horizontal two-stage low-cavitation high-flow centrifugal pump.

Background

The centrifugal pump works by making water generate centrifugal motion by utilizing the rotation of an impeller, the water pump is required to fill a pump shell and a water suction pipe with water before starting, then a motor is started to make a pump shaft drive the impeller and the water to do high-speed rotation motion, the water generates centrifugal motion and is thrown to the outer edge of the impeller and flows into a water pressure pipeline of the water pump through a runner of a volute pump shell, the utility model with the publication number of CN205858785U discloses a chemical centrifugal pump body, an outlet is arranged on the outer side surface of the chemical centrifugal pump body, a discharge runner is arranged in the chemical centrifugal pump body, the discharge runner comprises a radial runner and an axial runner, the radial runner is communicated with the outlet through axial runner fluid, preferably, the radial length of the radial runner is smaller than the axial length of the axial runner, the axial length of the axial runner is fixed along the circumferential direction of the chemical centrifugal pump body, and one end of the axial runner, which is connected with the radial runner, is smaller along the axial direction, the axial flow channel is larger along the other end far away from the radial flow channel in the axial direction, and the axial flow channel extends along the direction far away from the inlet, however, in the actual life, the centrifugal pump has the problems of complex manufacturing process and large cavitation allowance, and for the conveying of the medium easy to vaporize, the centrifugal pump has the problems of large device cavitation allowance, and the requirements of large conveying flow and high operation efficiency need to be met.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects of the prior art, the utility model provides a horizontal two-stage low-cavitation high-flow centrifugal pump, which solves the problem of low use efficiency of the existing device.

In order to achieve the purpose, the utility model is realized by the following technical scheme: the utility model provides a large-traffic centrifugal pump of horizontal two-stage low cavitation, includes the pump body, pump body one end fixed mounting has the suction section other end fixed mounting to have the pump cover, the inside axle that is equipped with of the pump body, epaxial fixed cover has connect first order impeller and secondary impeller, just be located in the one end of axle first order impeller one end spin has connect fixing bolt, the pump body is inside and to be located the outside of first order impeller is equipped with the stator, stator one end with suction section one end fixed connection, the pump body is inside and to be located secondary impeller's outside is equipped with the back lid, a pair of ring channel has been seted up on the back lid outer wall, and is a pair of O type circle has been placed respectively in the ring channel, and is a pair of O type circle outer lane with pump body inner wall contacts, back lid one end with stator other end fixed connection.

Preferably, a plurality of seals with the same structure are sleeved between the pump cover and the shaft, a plurality of seal covers with the same structure are sleeved outside the seals, and the seal covers are fixedly connected with the pump cover.

Preferably, a pump body flow channel is formed in the pump body, and the secondary impeller is located in the pump body flow channel.

Preferably, a pair of first pins is arranged between the guide vane and the suction section, and a pair of second pins is arranged between the guide vane and the rear cover.

Preferably, one end of the pump cover is provided with a groove, and the other end of the secondary impeller is inserted into the groove.

Preferably, a washer is provided between the other end of the secondary impeller and the shaft.

Preferably, a partition plate is fixedly arranged on the inner wall of the suction section.

Preferably, the other end of the primary impeller is in contact with one end of the secondary impeller.

Advantageous effects

The utility model provides a horizontal two-stage low-cavitation high-flow centrifugal pump which has the advantages that the device is compact in structure, has the characteristics of small cavitation allowance, good cavitation resistance, large flow range and high lift, is usually used for conveying an easily vaporized medium and is small in cavitation allowance, and is designed by adopting series impellers from the aspects of design, manufacture, assembly and the like, so that the problems of reducing the cavitation allowance, improving the lift, improving the efficiency, using stability and reducing the manufacture cost are solved from the aspect of design, and convenience is brought to the use of people.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the structure of the suction section of the present invention.

Fig. 3 is a schematic structural view of the rear cover of the present invention.

Fig. 4 is a schematic structural view of a pump body flow passage according to the present invention.

In the figure: 1. a suction section; 2. a first stage impeller; 3. a first pin; 4. a guide vane; 5. a second pin; 6. a rear cover; 7. a pump body; 8. a secondary impeller; 9. a pump cover; 10. sealing; 11. a sealing gland; 12. a partition plate; 13. an O-shaped ring; 14. and a pump body flow channel.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a horizontal two-stage low-cavitation high-flow centrifugal pump comprises a pump body 7, wherein one end of the pump body 7 is fixedly provided with a suction section 1, the other end of the suction section 1 is fixedly provided with a pump cover 9, a shaft is arranged in the pump body 7, a first-stage impeller 2 and a secondary impeller 8 are fixedly sleeved on the shaft, a fixing bolt is screwed on one end of the first-stage impeller 2 in one end of the shaft, a guide vane 4 is arranged in the pump body 7 and positioned outside the first-stage impeller 2, one end of the guide vane 4 is fixedly connected with one end of the suction section 1, a rear cover 6 is arranged in the pump body 7 and positioned outside the secondary impeller 8, a pair of annular grooves are formed in the outer wall of the rear cover 6, a pair of O-shaped rings 13 are respectively placed in the annular grooves, the outer rings of the O-shaped rings 13 are in contact with the inner wall of the pump body 7, one end of the rear cover 6 is fixedly connected with the other end of the guide vane 4, the pump cover 9 with a plurality of seals 10 that the structure is the same have been cup jointed between the axle, and is a plurality of the outside cover of seal 10 that the structure is the same has seal gland 11, seal gland 11 with pump cover 9 fixed connection, pump body 7 is inside has seted up pump body runner 14, secondary impeller 8 is located inside pump body runner 14, the stator 4 with be equipped with a pair of first pin 3 between the suction segment 1, the stator 4 with be equipped with a pair of second pin 5 between the back lid 6, pump cover 9 one end is equipped with the recess, secondary impeller 8's the other end inserts in the recess, secondary impeller 8's the other end with be equipped with the packing ring between the axle, fixed mounting has baffle 12 on the suction segment 1 inner wall, the primary impeller 2 other end with secondary impeller 8 one end contacts.

The following working principles, detailed connecting means thereof, and the following main descriptions of the working principles and processes thereof are well known in the art, and will be referred to by those skilled in the art for the specific connection and operation sequence of the components in the present disclosure.

Example (b): the inlet of the suction section 1 is provided with a partition plate 12, the prerotation strength of an impeller inlet can be reduced, the anti-cavitation performance is improved, a primary impeller 2 is arranged in a guide vane 4, the impeller is rotated at a high speed, fluid is guided into an inlet of a secondary impeller 8 through the guide vane 4 to realize acting, the primary impeller 2 is arranged in the guide vane 4, the secondary impeller 8 is arranged in a pump body flow channel 14 in a pump body 7, a rear cover 6 is arranged in the pump body 7 in an interference fit mode, and a sealing O-shaped ring 13 is arranged to prevent interstage medium leakage.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a large-traffic centrifugal pump of horizontal two-stage low cavitation, includes the pump body (7), its characterized in that, pump body (7) one end fixed mounting has suction section (1) other end fixed mounting to have pump cover (9), the inside axle that is equipped with of pump body (7), epaxial fixed cover has been connect with first-stage impeller (2) and secondary impeller (8), just be located in the one end of axle first-stage impeller (2) one end is screwed and has been connected with fixing bolt, inside the pump body (7) just be located the outside of first-stage impeller (2) is equipped with stator (4), stator (4) one end with suction section (1) one end fixed connection, inside the pump body (7) just be located the outside of secondary impeller (8) is equipped with back lid (6), seted up a pair of ring channel on back lid (6) outer wall, a pair of O type circle (13) has been placed respectively in the ring channel, the pair of O-shaped rings (13) are arranged on the outer ring and are in contact with the inner wall of the pump body (7), and one end of the rear cover (6) is fixedly connected with the other end of the guide vane (4).

2. The horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that a plurality of seals (10) with the same structure are sleeved between the pump cover (9) and the shaft, a sealing gland (11) is sleeved outside the plurality of seals (10) with the same structure, and the sealing gland (11) is fixedly connected with the pump cover (9).

3. The horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, wherein a pump body flow passage (14) is opened in the pump body (7), and the secondary impeller (8) is located in the pump body flow passage (14).

4. A horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that a pair of first pins (3) is provided between the guide vane (4) and the suction section (1), and a pair of second pins (5) is provided between the guide vane (4) and the back cover (6).

5. A horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that one end of the pump cover (9) is provided with a groove, and the other end of the secondary impeller (8) is inserted into the groove.

6. A horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that a washer is provided between the other end of the secondary impeller (8) and the shaft.

7. A horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that a partition plate (12) is fixedly mounted on the inner wall of the suction section (1).

8. A horizontal two-stage low-cavitation high-flow centrifugal pump according to claim 1, characterized in that the other end of the primary impeller (2) is in contact with one end of the secondary impeller (8).