CN211116621U

CN211116621U - Vortex pump

Info

Publication number: CN211116621U
Application number: CN201921856602.1U
Authority: CN
Inventors: 刘艳
Original assignee: Shanghai Bainuo Pumps And Valves Co ltd
Current assignee: Shanghai Bainuo Pumps And Valves Co ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-07-28
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to a volute pump, including the pump body, pump cover, apron, pump shaft, impeller and motor drive portion, pump cover, apron and the pump body enclose the pump chamber, the pump shaft sets up in the pump chamber, the one end of pump shaft is stretched out the pump cover, and with motor drive portion's output shaft fixed connection, the other end clearance fit of pump shaft installs the impeller, the both sides surface of impeller respectively with apron and pump body clearance contact, it is just right respectively to go back symmetrical arrangement on the surface of the both sides of impeller the annular basin of apron and pump body wall, it is provided with the balancing hole that the axial runs through still to equidistant on the impeller. Compared with the prior art, the utility model discloses when guaranteeing that impeller axial force is balanced, can improve the pump water effect of volute pump, simultaneously, key parts such as the pump shaft of volute pump are easily maintained and are changed.

Description

Vortex pump

Technical Field

The utility model belongs to the technical field of the pump, a volute pump is related to.

Background

At present, most of volute pump heads are composed of a pump body, an impeller, a mechanical seal and a pump cover, the pump shaft and a motor shaft share, the mechanical seal of the volute pump adopts a compression type common mechanical seal, the impeller is fixed through pretightening force of an impeller nut, the mechanical seal is compressed, the compression amount of the mechanical seal is often difficult to effectively control, and therefore the maintenance cycle of the pump is shortened, and the mechanical seal needs to be frequently replaced. The precision requirement of the peripheral pump is extremely high, the axial position of the impeller is difficult to control and adjust in actual processing and assembly, frequent adjustment is often needed, the precision requirement of fine gaps on two sides of the impeller is difficult to control due to the limitation of a locking nut at the end of the pump shaft.

The bearing and grinding rings are arranged on two sides of the impeller of the common vortex pump, so that the pump body and the plane of the pump cover are prevented from being damaged by play when the axial force of the rotor assembly is unbalanced, the influence of the axial force on the pump when the pump operates is not fully considered, the axial force generated when the pump operates is completely balanced by the motor bearing, and particularly, the motor bearing is easily damaged when the vortex pump with large lift operates for a long time. The common motor lengthened shaft for the pump shaft of the common vortex pump has the disadvantages that when the shaft is worn, the whole motor rotor must be replaced, the maintenance cost is high, and the disassembly is difficult.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide a vortex pump for overcoming the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized through the following technical scheme:

the utility model provides a peripheral pump, includes the pump body, pump cover, apron, pump shaft, impeller and motor drive division, pump cover, apron and the pump body enclose the pump chamber, the pump shaft sets up in the pump chamber, and the one end of pump shaft stretches out the pump cover, and with motor drive division's output shaft fixed connection, the other end clearance fit of pump shaft installs the impeller, the both sides surface of impeller respectively with apron and pump body clearance contact, it is just right respectively still symmetrical arrangement on the surface of the both sides of impeller the annular basin of apron and pump body wall, it is provided with the balancing hole that the axial runs through still to equidistant on the impeller.

Furthermore, the pump cover is also provided with a mechanical seal, and a gap at one end of the pump shaft connected with the motor driving part penetrates through the mechanical seal in a sealing manner.

Furthermore, the outer side of the mechanical seal is provided with a boss which can prop against the end face of the pump cover, and a sealing gland which can press the boss can be detachably arranged on the end face of the pump cover.

Still preferably, the seal gland and the pump cover are fixedly installed through fastening screws.

Further preferably, the sealing gland is annular, the inner end surface of the sealing gland is partially recessed, and the sealing gland and the pump cover are matched to form a cavity for clamping two ends of the boss.

Furthermore, the pump shaft and the output shaft end of the motor driving part are fixed through a set screw.

Furthermore, the two sides of the outer wall of the impeller are symmetrical and are in an annular conical structure, and blades are fixedly mounted on the annular conical structure.

Furthermore, the blades are respectively arranged on two sides of the annular conical structure at equal intervals, and the blades on the two sides of the annular conical structure are staggered with each other. More preferably, the number of the blades on both sides of the annular conical structure and the spacing, the shape and the like between two adjacent blades are the same.

Furthermore, the sum of the gaps between the end surfaces of the two sides of the impeller and the pump body and the cover plate is 0.2-0.3 mm, the leakage amount of the pump is large when the gap is too large, the efficiency is low, the gap is small, and the pump is easy to rub and clamp.

Compared with the prior art, the utility model has the advantages of it is following:

(1) the axial force balance effect is good: the impeller is designed to be approximately symmetrical and is provided with a balance hole and a water ring groove, the impeller and the shaft are in clearance fit, the impeller can be in free floating balance in the pump cavity, the bearing load of the motor is reduced, and the operation is more stable.

(2) The maintenance is convenient: adopt collection dress formula mechanical seal, sealed effect is better, need not to control special compressive capacity, and it is more convenient to install, conveniently dismantles between mechanical seal and the pump cover, also adopts the fastening screw of easily dismantling between pump shaft and the motor fixed, and whole equipment is convenient for later maintenance.

(3) The machining precision is easy to control: the processing and the assembly only need to guarantee the total size of the distance between the thickness of the impeller and the cover plate of the pump body, and the gaps between the two sides of the impeller and the pump body and the gap between the two sides of the impeller and the gap between the two sides of the pump body and the gap between the two sides of the pump cover are not required to be controlled respectively, so that the difficulty of the processing and the assembly precision.

(4) The blades on the two sides of the annular conical structure are staggered with each other, so that the impeller can generate larger centrifugal force when in work, and the water pumping efficiency is higher.

Drawings

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

the notation in the figure is:

the pump comprises a cover plate 1, an impeller 2, a pump body 3, a pump shaft 4, a pump cover 5, a mechanical seal 6, a sealing gland 7, a connecting frame 8, a motor 9, a blade 10, an annular water tank 11, a balance hole 12 and a boss 13.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

Example 1:

the utility model provides a volute pump, its structure is shown with reference to figure 1, including the pump body 3, the pump cover 5, apron 1, the pump shaft 4, impeller 2 and motor drive portion 9, the pump cover 5, apron 1 and the pump body 3 all set up on hookup frame 8, and the cooperation encloses into the pump chamber, pump shaft 4 sets up in the pump chamber, pump cover 5 is stretched out to the one end of pump shaft 4, and with the output shaft end fixed connection of motor drive portion 9, impeller 2 is installed to the other end clearance fit of pump shaft 4, impeller 2's both sides surface respectively with apron 1 and the 3 clearance contact of the pump body, still symmetrical arrangement has respectively just to the annular basin 11 of apron 1 and the 3 walls of the pump body on impeller 2's both sides surface, it is provided with the balanced hole 12 that the axial runs.

Referring to fig. 1 again, the pump cover 5 is further provided with a mechanical seal 6, one end of the pump shaft 4 connected with the motor driving part 9 penetrates through the mechanical seal 6 in a clearance sealing manner, a boss 13 capable of abutting against the end face of the pump cover 5 is arranged on the outer side of the mechanical seal 6, and a sealing gland 7 capable of pressing the boss 13 is fixedly mounted on the end face of the pump cover 5 through a fastening screw, so that the mechanical seal 6, the pump shaft 4 and the like can be conveniently disassembled and assembled during subsequent maintenance.

Referring to fig. 1 again, the sealing gland 7 is annular, the inner end surface of the sealing gland is partially recessed, and is matched with the pump cover 5 to form a cavity for clamping two ends of the boss 13, the cavity is used for clamping and locking the boss 13 in the radial direction and the axial direction, so that the axial and radial fixing effects of the mechanical seal 6 can be ensured, and further, the gap sealing between the mechanical seal 6 and the pump shaft 4 is ensured.

Referring to fig. 1 again, the pump shaft 4 and the output shaft end of the motor driving part 9 are fixed by a set screw.

Referring to fig. 1 again, the outer wall of the impeller 2 is symmetrical at both sides and has an annular conical structure, and blades 10 are fixedly mounted on the annular conical structure. Meanwhile, the blades 10 are respectively arranged on two sides of the annular conical structure at equal intervals, and the blades 10 on two sides of the annular conical structure are staggered with each other, so that the centrifugal force generated by the impeller 2 can be improved, and the water pumping efficiency is further improved.

Furthermore, the sum of the gaps between the end surfaces of the two sides of the impeller 2 and the pump body 3 and the cover plate 1 is 0.2-0.3 mm, the leakage amount of the pump is large when the gap is too large, the efficiency is low, the gap is small, and the pump is easy to rub and clamp.

The volute pump of this embodiment adopts collection dress formula mechanical seal 6 at specific during operation, can reduce mechanical seal 6's the installation degree of difficulty to sealed effect obtains effectively promoting. The whole vortex pump is provided with an independent axial force balance system, the impeller 2 is designed by adopting a unique structure size, and meanwhile, the balance hole 12 and the water ring groove are arranged on the impeller 2, so that the function of fully balancing 4 axial forces of the vortex pump is achieved, the load borne by a motor bearing is reduced, and the service life of the motor is prolonged.

The pump shaft 4 is fixed on the shaft of the motor 9 by a set screw, the mechanical seal 6 penetrates through the pump shaft 4 and is installed on the pump cover 5, and the mechanical seal 6 is pressed by a pressing cover to form a pair of sealing groups. When the pump needs to be replaced, the whole pump head does not need to be replaced, only individual parts need to be replaced, and cost can be effectively saved.

In the above embodiment, the motor driving portion may be a conventional motor, and further, the mechanical seal may be a mechanical seal structure for a pump, which is commonly used in the art.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The utility model provides a peripheral pump, its characterized in that, includes the pump body, pump cover, apron, pump shaft, impeller and motor drive portion, pump cover, apron and pump body enclose into the pump chamber, the pump shaft sets up in the pump chamber, and the one end of pump shaft stretches out the pump cover, and with motor drive portion's output shaft fixed connection, the other end clearance fit of pump shaft installs the impeller, the both sides surface of impeller respectively with apron and pump body clearance contact, it is just right respectively to go back symmetrical arrangement on the surface of the both sides of impeller the annular basin of apron and pump body wall, it is provided with the balancing hole that the axial runs through still to be equidistant on the impeller.

2. The peripheral pump of claim 1, wherein the pump cover further comprises a mechanical seal, and an end of the pump shaft connected to the motor driving part is sealed by a gap passing through the mechanical seal.

3. A peripheral pump in accordance with claim 2, wherein the mechanical seal has a boss at its outer side for abutting against the end surface of the pump cover, and a sealing cover is detachably mounted on the end surface of the pump cover for pressing the boss.

4. The peripheral pump of claim 3, wherein the gland cover and the pump cover are fixedly mounted by fastening screws.

5. The peripheral pump of claim 3, wherein the gland is annular and has a concave inner end surface and cooperates with the pump cover to form a cavity for clamping two ends of the boss.

6. The peripheral pump of claim 1, wherein the pump shaft is secured to the output shaft end of the motor drive by a set screw.

7. The peripheral pump of claim 1, wherein the outer wall of the impeller is bilaterally symmetrical and has an annular conical structure, and the vanes are fixedly mounted on the annular conical structure.

8. The vortex pump according to claim 7, wherein the vanes are equally spaced on either side of the annular cone structure, and the vanes on either side of the annular cone structure are staggered.

9. The peripheral pump of claim 1, wherein the sum of the gaps between the end surfaces of the two sides of the impeller and the pump body and the cover plate is 0.2-0.3 mm.