CN219452496U

CN219452496U - Connection structure for impeller and shaft

Info

Publication number: CN219452496U
Application number: CN202320640494.4U
Authority: CN
Inventors: 王家权; 关冰; 陈曦; 孙彬彬; 王淼
Original assignee: DALIAN DEEP BLUE PUMP CO LTD
Current assignee: DALIAN DEEP BLUE PUMP CO LTD
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-08-01
Anticipated expiration: 2033-03-28

Abstract

The utility model provides a connection structure for an impeller and a shaft, comprising: the impeller is arranged on the impeller shaft, a hub is arranged at a rear cover plate of the impeller, a central hole is formed in the center of the hub, rectangular threads are arranged in the central hole, the front end of the impeller shaft is a rectangular threaded shaft matched with the central hole, and the impeller is arranged on the impeller shaft through the cooperation of the central hole and the rectangular threaded shaft.

Description

Connection structure for impeller and shaft

Technical Field

The utility model relates to the technical field of single-stage cantilever pumps, in particular to a connecting structure for an impeller and a shaft.

Background

The centrifugal pump is used as medium conveying and pressurizing equipment, and the main structure of the centrifugal pump consists of an overflow part, a sealing part and a bearing part, wherein an impeller in the overflow part plays a main role, and the shape and the size of the impeller are in a dense and inseparable relation with the performance of the pump, so that the centrifugal pump is a core part. At present, most impellers of centrifugal pumps are fixedly arranged on a pump shaft through keys and impeller locking nuts, the structure is simple, but the stability is poor, the impellers are immersed in a medium, the impellers are immersed in the medium for a long time, the joint of the impellers and the shaft can be blocked, and when maintenance or replacement is needed, the disassembly is very difficult, and sometimes certain damage is needed. In addition, the structure forms larger shearing force on the pump shaft when the pump is started, stopped and suddenly reversed, the pump shaft is easy to break, the nut and the pump shaft are extremely easy to have no instant same speed under the reaction force, and the impeller is loosened and falls off.

It is therefore desirable to design a connection for the impeller and the shaft.

Disclosure of Invention

According to the technical problem set forth above, a connection structure for an impeller and a shaft is provided. The utility model mainly utilizes the connection mode of arranging rectangular threads between the impeller and the impeller shaft, thereby having the effect of avoiding the pump shaft from being broken caused by the shearing force during start and stop. The utility model adopts the following technical means:

a connection structure for an impeller and a shaft, comprising: the impeller is arranged on the impeller shaft, a hub is arranged at a rear cover plate of the impeller, a central hole is formed in the center of the hub, rectangular threads are arranged in the central hole, the front end of the impeller shaft is a rectangular threaded shaft matched with the central hole, and the impeller is arranged on the impeller shaft through the cooperation of the central hole and the rectangular threaded shaft.

Further, the screwing direction between the rectangular screw thread of the central hole and the rectangular screw thread shaft is consistent with the screwing direction of the impeller.

Further, a shaft sleeve is arranged between the hub and the shaft shoulder of the impeller shaft, and two sealing structures are arranged on the shaft sleeve.

Further, the front end of the impeller shaft is provided with a threaded hole, and the hub is fixed on the rectangular threaded shaft through the screw matched with the threaded hole, so that the impeller is prevented from falling off during reverse rotation.

Further, a sealing ring is arranged between the screw and the hub.

Further, a flange plate structure is arranged on the screw, a fastening pit is formed in the front end of the hub, and the flange plate structure is matched with the fastening pit of the hub.

The utility model has the following advantages:

1. according to the connecting structure for the impeller and the shaft, provided by the utility model, the rectangular threaded connection mode is adopted between the impeller and the impeller shaft, so that the effect of avoiding pump shaft fracture caused by shearing force during start and stop is achieved.

2. According to the connecting structure for the impeller and the shaft, provided by the utility model, larger torque can be transmitted through a rectangular threaded fixing mode.

3. The connecting structure for the impeller and the shaft provided by the utility model can be quickly disassembled and assembled in a rectangular threaded fixing mode.

4. The connecting structure for the impeller and the shaft effectively locks the impeller and the shaft by using the screw, and prevents the impeller from being separated when the impeller is reversed.

For the reasons, the utility model can be widely popularized in the fields of single-stage cantilever pump technology and the like.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural view of a connection structure for an impeller and a shaft according to the present utility model.

In the figure: 1. an impeller shaft; 2. an impeller; 3. a hexagon socket head cap screw; 4. a shaft sleeve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the present utility model provides a connection structure for an impeller and a shaft, comprising: the impeller comprises an impeller shaft 1 and an impeller 2, wherein the impeller 2 is arranged on the impeller shaft 1, a hub is arranged at a rear cover plate of the impeller 2, a central hole is formed in the center of the hub, rectangular threads are arranged in the central hole, the front end of the impeller shaft 1 is a rectangular threaded shaft matched with the central hole, and the impeller 2 is arranged on the impeller shaft 1 through the central hole in a manner of being matched with the rectangular threaded shaft; the screwing direction between the rectangular screw thread of the central hole and the rectangular screw thread shaft is consistent with the screwing direction of the impeller 2; a shaft sleeve 4 is arranged between the hub and the shaft shoulder of the impeller shaft 1, and two sealing structures are arranged on the shaft sleeve 4; the front end of the impeller shaft 1 is provided with a threaded hole, and the hub is fixed on the rectangular threaded shaft through the screw matched with the threaded hole, so that the impeller 2 is prevented from falling off when reversing; a sealing ring is arranged between the screw and the hub; the screwing direction between the rectangular screw thread of the central hole and the rectangular screw thread shaft is consistent with the screwing direction of the impeller 2; the screw is provided with a flange plate structure, the front end of the hub is provided with a fastening pit, and the flange plate structure is matched with the fastening pit of the hub.

Example 1

As shown in fig. 1, the present utility model provides a connection structure for an impeller and a shaft, which mainly comprises an impeller shaft 1, an impeller 2, a hexagon socket head cap screw 3 and a shaft sleeve 4. The shaft end and the central hole of the impeller hub are processed into a rectangular threaded structure through a numerical control machine tool, meanwhile, threaded holes are drilled at the ends of the rectangular threads of the shaft, the shaft with two O-shaped rings is sleeved on the shaft, the impeller is screwed in through the matching of the rectangular threads and the shaft, then a sealing ring is sleeved on the hexagonal socket head cap screw 3, and the hexagonal socket head cap screw penetrates through the impeller hub to be screwed in the threaded central hole of the shaft end. The end part of the impeller hub is provided with three pits, and finally, the flange plate of the hexagon socket head cap screw 3 is pressed into the pits through a special tool, so that the looseness prevention of the hexagon socket head cap screw is realized, the detachment or looseness of the impeller 2 during the reverse rotation is effectively avoided, and the reliability of the pump is improved.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims

1. A connection structure for an impeller and a shaft, comprising: the impeller is arranged on the impeller shaft, a hub is arranged at a rear cover plate of the impeller, a central hole is formed in the center of the hub, rectangular threads are arranged in the central hole, the front end of the impeller shaft is a rectangular threaded shaft matched with the central hole, and the impeller is arranged on the impeller shaft through the cooperation of the central hole and the rectangular threaded shaft.

2. A connection structure for an impeller and a shaft according to claim 1, wherein a screwing direction between the rectangular screw of the center hole and the rectangular screw shaft coincides with a screwing direction of the impeller.

3. The connection structure for an impeller and a shaft according to claim 1, wherein a shaft sleeve is arranged between the hub and a shaft shoulder of the impeller shaft, and two sealing structures are arranged on the shaft sleeve.

4. The connection structure for the impeller and the shaft according to claim 1, wherein the front end of the impeller shaft is provided with a threaded hole, and the hub is fixed on the rectangular threaded shaft by being matched with the threaded hole through a screw, so that the impeller is prevented from falling off when the impeller is reversed.

5. The connection structure for an impeller and a shaft according to claim 4, wherein a seal ring is provided between the screw and the hub.

6. A connection structure for an impeller and a shaft according to claim 1, wherein a screwing direction between the rectangular screw of the center hole and the rectangular screw shaft coincides with a screwing direction of the impeller.

7. The connection structure for the impeller and the shaft according to claim 4, wherein the screw is provided with a flange structure, the front end of the hub is provided with a fastening recess, and the flange structure is matched with the fastening recess of the hub.