CN212643080U

CN212643080U - Motor-driven centrifugal pump device with anti-cavitation double-suction impeller

Info

Publication number: CN212643080U
Application number: CN202020588953.5U
Authority: CN
Inventors: 王康兵; 王德柱
Original assignee: Wuxi Zhongkang Fluid Technology Co ltd
Current assignee: Wuxi Zhongkang Fluid Technology Co ltd
Priority date: 2020-04-20
Filing date: 2020-04-20
Publication date: 2021-03-02
Anticipated expiration: 2030-04-20

Abstract

The utility model discloses a motorized centrifugal pump device with anti-cavitation double-suction impeller, which comprises a driving device, a rotating part and an impeller group; the power output end of the driving device is matched and connected with the rotating piece to drive the rotating piece to rotate; the impeller groups are uniformly distributed on two sides of the rotating part in the circumferential direction; the impeller assembly comprises a first blade and a second blade; the length of the first blade is smaller than that of the second blade; the first blades and the second blades are sequentially distributed at intervals along the rotating direction of the impeller set; utilize the different blade combination of a plurality of groups length, when taking into account the inside whole liquid flow of casing, the liquid flow of casing focus inlet position can be strengthened to elongated second blade to maintain entrance pressure, reduce the probability that takes place the cavitation.

Description

Motor-driven centrifugal pump device with anti-cavitation double-suction impeller

Technical Field

The utility model relates to the technical field of fluid machinery, especially, relate to a motor-driven type centrifugal pump device with anti cavitation double suction impeller.

Background

The centrifugal pump impeller commonly used at present often can not well deal with the cavitation phenomenon while realizing high efficiency, causing the problems of shortened service life of equipment, increased maintenance cost and the like. Therefore, it is necessary to invent a centrifugal pump device which can effectively resist cavitation and has strong adaptability to working environment.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the deficiencies in the prior art, the utility model provides a can effectively anti cavitation and centrifugal pump device that operational environment adaptability is strong.

The technical scheme is as follows: in order to achieve the above object, the present invention provides a motorized centrifugal pump device with an anti-cavitation double suction impeller, which comprises a driving device, a rotating member and an impeller set; the power output end of the driving device is matched and connected with the rotating piece to drive the rotating piece to rotate; the impeller groups are uniformly distributed on two sides of the rotating part in the circumferential direction; the impeller assembly comprises a first blade and a second blade; the length of the first blade is smaller than that of the second blade; the first blades and the second blades are sequentially distributed at intervals along the rotating direction of the impeller set; the corresponding rotating diameter of one end of the first blade close to the center of the rotating part is D₁The corresponding rotating diameter of one end of the second blade close to the center of the rotating part is D₀，D₁＞D₀。

Further, the corresponding rotating diameter at the edge of the rotating part is D₂，(D₂-D₁)/(D₂-D₀)＝0.4～0.7。

Further, (D)₂-D₁)/(D₂-D₀)＝0.5～0.6。

Further, the device also comprises a seat body; the seat body comprises a pressure bearing part and a base; the periphery of the rotating part is covered with a shell in a matching way; the driving device and the shell are connected and arranged at the top of the pressure bearing part; the top of the base is provided with a sliding rail; the bottom of the pressure-bearing part is provided with a chute; the sliding groove is correspondingly matched with the sliding rail.

Furthermore, a telescopic rod is arranged at the bottom of the sliding rail; the telescopic rod is positioned at one end of the slide rail in the length direction; one end of the sliding rail, which is far away from the telescopic rod, is hinged with the base; and adjusting the length of the telescopic rod to realize the pitching change of the slide rail.

Furthermore, lifting lugs are respectively arranged on two opposite sides of the base; and a plurality of hook grooves are respectively arranged in the lifting lugs along the vertical direction.

Has the advantages that: the utility model relates to a motorized centrifugal pump device with anti-cavitation double-suction impeller, which comprises a driving device, a rotating part and an impeller group; the power output end of the driving device is matched and connected with the rotating piece to drive the rotating piece to rotate; the impeller groups are uniformly distributed on two sides of the rotating part in the circumferential direction; the impeller assembly comprises a first blade and a second blade; the length of the first blade is smaller than that of the second blade; the first blades and the second blades are sequentially distributed at intervals along the rotating direction of the impeller set; utilize the different blade combination of a plurality of groups length, when taking into account the inside whole liquid flow of casing, the liquid flow of casing focus inlet position can be strengthened to elongated second blade to maintain entrance pressure, reduce the probability that takes place the cavitation.

Drawings

FIG. 1 is a schematic view of the overall structure of a centrifugal pump apparatus;

FIG. 2 is a detail view of a part of the base;

FIG. 3 is a schematic structural view of an impeller assembly;

FIG. 4 is a schematic view of a rotating member;

fig. 5 is a schematic view of a lifting lug structure.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

A motor-driven centrifugal pump assembly with anti-cavitation double suction impeller, as shown in fig. 1-4, comprising a drive device 1, a rotor 2 and an impeller assembly 3; the power output end of the driving device 1 is matched and connected with the rotating piece 2 to drive the rotating piece 2 to rotate;the impeller groups 3 are circumferentially and uniformly distributed on two sides of the rotating part 2, and the working efficiency of the pump body can be improved through a double-suction structure; the impeller group 3 comprises a first blade 31 and a second blade 32; the first blade 31 is shorter than the second blade 32; the first blades 31 and the second blades 32 are sequentially distributed at intervals along the rotating direction of the impeller set 3; the end of the first blade 31 near the center of the rotating member 2 has a corresponding rotating diameter D₁The end of the second blade 32 near the center of the rotating member 2 has a corresponding rotating diameter D₀，D₁＞D₀(ii) a By combining a plurality of groups of blades with different lengths, the liquid flow at the position of the liquid inlet of the gravity center of the shell can be enhanced by the lengthened second blade 32 while the whole liquid flow in the shell 4 is considered, so that the pressure at the inlet is maintained, and the probability of cavitation is reduced.

The corresponding rotating diameter at the edge of the rotating part 2 is D₂，(D₂-D₁)/(D₂-D₀) The content of (D) is 0.4 to 0.7, and (D) is particularly preferable₂-D₁)/(D₂-D₀) 0.5-0.6; because the second blade 32 has a larger length, the stress in the long-time rotation is larger, which easily causes the deformation, and the like, while the first blade 31 can share the stress of the second blade 32 at the outer part of the shell, (D)₂-D₁)/(D₂-D₀) The value of (b) represents the ratio of the region width shared by the first blade 31 and the second blade 32 to the whole region width of the stress applied to the second blade 32, if the ratio is too small, the effect of sharing the stress applied to the second blade 32 cannot be achieved, and if the ratio is too large, the running resistance of the impeller set is increased, which is not beneficial to the whole running energy saving, and the further enhancement effect on the anti-cavitation capability is limited.

As shown in fig. 2 and fig. 3, the utility model further comprises a seat body 5; the seat body 5 comprises a pressure bearing part 51 and a base 52; the periphery of the rotating part 2 is covered with a shell 4 in a matching way; the driving device 1 and the shell 4 are connected and arranged on the top of the pressure bearing part 51; the top of the base 52 is provided with a slide rail 501; the bottom of the pressure-bearing part 51 is provided with a chute 502; the sliding groove 502 is correspondingly matched with the sliding rail 501; the traditional seat body 5 has large self weight and is inconvenient to carry because the reason of lowering the center of gravity needs to be considered; by splitting the seat body 5 into the pressure bearing member 51 with smaller mass and the base 52 functioning as a stable counterweight, the splitting can be flexibly performed when transferring the apparatus.

The bottom of the sliding rail 501 is provided with a telescopic rod 505; the telescopic rod 505 is located at one end of the slide rail 501 in the length direction; one end of the sliding rail 501, which is far away from the telescopic rod 505, is hinged with the base 52; the length of the telescopic rod 505 is adjusted to realize the pitching change of the sliding rail 501; through the nimble every single move regulation of slide rail 501 to can make centrifugal pump device can adapt to special operating mode such as slope or mounted position slope, greatly improve operating condition adaptability, hold the one end of slide rail 501 with the help of hoist and mount type equipment, thereby utilize the cooperation of a plurality of hole sites and round pin post on the telescopic link 505 to realize the locking of angle.

As shown in fig. 5, lifting lugs 507 are respectively arranged on two opposite sides of the base 52; a plurality of hook grooves 509 are respectively arranged in the lifting lugs 507 along the vertical direction; the centrifugal pump device can be conveniently hoisted by installing the lifting lugs 507; the hook groove 509 that vertical interval set up can further divide the height of hoisting point on the basis of traditional lug to adapt to the length difference that exists between the different hoist and mount ropes, save the process of adjusting rope ladder, make safe and stable more during the transport position.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A motorized centrifugal pump device with an anti-cavitation double suction impeller, characterized in that: comprises a driving device (1), a rotating part (2) and an impeller set (3); the power output end of the driving device (1) is matched and connected with the rotating piece (2) to drive the rotating piece (2) to rotate; the impeller groups (3) are circumferentially and uniformly distributed on two sides of the rotating part (2); the impeller set (3) comprises a first bladeA sheet (31) and a second blade (32); the first blade (31) has a smaller length than the second blade (32); the first blades (31) and the second blades (32) are sequentially distributed at intervals along the rotating direction of the impeller set (3); the corresponding rotating diameter of one end of the first blade (31) close to the center of the rotating part (2) is D₁The corresponding rotating diameter of one end of the second blade (32) close to the center of the rotating part (2) is D₀，D₁＞D₀。

2. The motorized centrifugal pump apparatus with an anti-cavitation double suction impeller of claim 1, wherein: the corresponding rotating diameter at the edge of the rotating part (2) is D₂，(D₂-D₁)/(D₂-D₀)＝0.4～0.7。

3. The motorized centrifugal pump apparatus with an anti-cavitation double suction impeller of claim 2, wherein: (D)₂-D₁)/(D₂-D₀)＝0.5～0.6。

4. The motorized centrifugal pump apparatus with an anti-cavitation double suction impeller of claim 1, wherein: also comprises a seat body (5); the seat body (5) comprises a pressure bearing part (51) and a base (52); the periphery of the rotating part (2) is covered with a shell (4) in a matching way; the driving device (1) and the shell (4) are connected and arranged at the top of the pressure bearing part (51); the top of the base (52) is provided with a sliding rail (501); the bottom of the pressure bearing piece (51) is provided with a sliding groove (502); the sliding groove (502) is correspondingly matched with the sliding rail (501).

5. The motorized centrifugal pump apparatus with an anti-cavitation double suction impeller of claim 4, wherein: the bottom of the sliding rail (501) is provided with a telescopic rod (505); the telescopic rod (505) is positioned at one end of the sliding rail (501) in the length direction; one end of the sliding rail (501), which is far away from the telescopic rod (505), is hinged with the base (52); the length of the telescopic rod (505) is adjusted, and the pitching change of the sliding rail (501) is realized.

6. The motorized centrifugal pump apparatus with an anti-cavitation double suction impeller of claim 4, wherein: lifting lugs (507) are respectively arranged on two opposite sides of the base (52); a plurality of hook grooves (509) are respectively arranged in the lifting lug (507) along the vertical direction.