CN213392706U

CN213392706U - High-efficiency slurry pump

Info

Publication number: CN213392706U
Application number: CN202022458780.8U
Authority: CN
Inventors: 王保刚; 许晨霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-06-08
Anticipated expiration: 2030-10-30

Abstract

The utility model relates to a sediment stuff pump technical field especially relates to a high-efficient sediment stuff pump. The impeller comprises blades which are uniformly distributed in a radial mode, a rear cover plate and a front cover plate are arranged on two sides of each blade, a bent portion extending towards one side of an impeller inlet is arranged on the front cover plate, and the blades extend towards the direction of a rotation center inlet edge of the impeller and are connected with the bent portion. The front cover plate of the impeller is provided with the bending part, so that the conical angle of the front cover plate is reduced, the turning radius of the front cover plate of the impeller is properly enlarged, the fluid is less in flow shedding due to the inertia effect, and the local resistance loss of the blade inlet is reduced. The sealing performance outside the impeller is improved by forming a clearance fit surface with the front guard plate, the structural strength of the impeller is improved, and the problems that the fluid in a high-pressure area is easy to leak, the volume loss is large, the working efficiency of the slurry pump is low, and the service life is short are solved.

Description

High-efficiency slurry pump

Technical Field

The utility model relates to a sediment stuff pump technical field especially relates to a high-efficient sediment stuff pump.

Background

The angle of the conical surface of the front cover plate of the impeller of the existing slurry pump is large, generally between 60 degrees and 70 degrees, the starting position of the impeller blade is far away from the inlet edge of the impeller, the length of the combination of the front cover plate and the front protective plate of the impeller is short, fluid in a high-pressure area is easy to leak to a low-pressure area, the volume loss is increased, the working efficiency of the slurry pump is reduced, and the local abrasion and damage of the impeller of the slurry pump are caused by the phenomenon of serious cavitation sometimes under individual conditions.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem, it is not enough to the technique that the aforesaid exists, a high-efficient sediment stuff pump is provided, the operation and the availability factor of sediment stuff pump have been improved through the hydraulic model who changes the impeller, the adoption sets up the flexion at the front shroud of impeller, reduce impeller front shroud conical surface angle, set up to between 40 degrees and 50 degrees, the length with front shroud clearance fitting surface has been extended, the sealing performance in the impeller outside has been improved, the structural strength of impeller has been increased, the fluid that has hindered the high nip leaks the low-pressure area, the effectual sediment stuff pump volumetric loss that has solved is big, the work efficiency of sediment stuff pump is low, the problem that life is low.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: high-efficient sediment stuff pump, including impeller and pump case, the impeller includes radial evenly distributed's blade, the both sides of blade are provided with back shroud and front shroud, the front shroud is provided with the flexion that extends to impeller import one side, the blade to the centre of rotation of impeller import limit direction extend and with the flexion is connected.

According to the technical scheme, a front guard plate is arranged in the pump shell and corresponds to the front cover plate, and the front guard plate is matched with the bent shape of the bent portion to form a clearance fit conical surface.

Further optimizing the technical scheme, the blade is designed to be an arc-shaped section with an arc-shaped axial surface sectional line at the inlet of the impeller.

Further optimizing the technical scheme, the blade wrap angle alpha range of the blade is 160-200 degrees.

Further optimize this technical scheme, the axial cross-section of back shroud is the awl spine, the blade is along the spiral setting of awl spine arc.

Further optimize this technical scheme, the lateral surface radial of back shroud and front shroud is provided with the auxiliary blade.

Further optimizing the technical scheme, the blade wrap angle alpha of the blade is 180 degrees.

Further optimizing the technical scheme, the blade wrap angle alpha of the blade is 260 degrees.

Further optimizing the technical scheme, the conical surface angle beta of the front cover plate is set to be between 40 and 50 degrees.

The utility model has the advantages of it is following: 1. the front cover plate of the impeller is provided with the bent part, so that the conical angle of the front cover plate is reduced, and the structure increases the sealing performance of the outer side of the impeller by forming a clearance fit surface with the front guard plate, so that the impeller is not easy to wear, and the structural strength is enhanced; 2. the distance between the blade and the pump opening is reduced, the wrap angle of the blade is increased, the length of the blade is further improved, and the pumping capacity of the slurry pump is improved due to the structure; 3. the turning radius of the front cover plate of the impeller is properly enlarged, the fluid is prevented from flowing off due to the inertia effect, and the local resistance loss of the blade inlet is reduced.

Drawings

FIG. 1 is a schematic cross-sectional structure view of a high-efficiency slurry pump.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic axial side structure diagram of an impeller of the high-efficiency slurry pump.

Fig. 4 is a schematic structural diagram of the impeller of the high-efficiency slurry pump after the front cover plate is removed.

FIG. 5 is an axial elevational view of a vane portion of the impeller.

In the figure: 10. an impeller; 101. a secondary blade; 11. a blade; 111. an arc-shaped section; 12. a rear cover plate; 13. a front cover plate; 131. a bending section; 20. a pump housing; 21. a front guard plate; 22. a rear guard plate; 23. a volute; 30. a connecting shaft; 40. a rotation driving device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of the words "a," "an," or "the" and similar referents in the specification and claims of the present application does not denote a limitation of quantity, but rather denotes the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

The specific implementation mode is as follows: referring to fig. 1 and 2, the high-efficiency slurry pump includes an impeller 10 and a pump case 20, the impeller 10 includes blades 11 which are radially and uniformly distributed, two sides of the blades 11 are provided with a rear cover plate 12 and a front cover plate 13, the front cover plate 13 is provided with a bending portion 131 which extends to one side of an inlet of the impeller 10, and the blades 11 extend to the direction of the inlet edge of the rotation center of the impeller 10 and are connected with the bending portion 131.

A front guard plate 21 is arranged in the pump housing 20 at a position corresponding to the front cover plate 13, and the front guard plate 21 is adapted to the curved shape of the curved portion 131 to form a clearance fit conical surface. The taper angle β of the front cover plate 13 is set to be between 40 degrees and 50 degrees. A rear guard plate 22 is further arranged on the inner side of the pump shell 20 corresponding to the impeller 10, a volute 23 is arranged on the outer edge between the rear guard plate 22 and the front guard plate 21, and a pump outlet is tangentially arranged on one side of the volute 23. The impeller 10 is connected to the rotary drive 40 via a connecting shaft 30.

As shown in fig. 3, the blade 11 is provided with an arc-shaped segment 111 having an arc-shaped axial sectional line at the inlet of the impeller 10. The outer side surfaces of the rear cover plate 12 and the front cover plate 13 are provided with auxiliary blades 101 in a radial shape.

As shown in fig. 4, the blade wrap angle α of the blade 11 ranges from 160 degrees to 200 degrees, and specifically α may also be 180 degrees or 260 degrees.

Referring to fig. 2 and 5, the axial section of the back cover plate 12 is a conical ridge shape, and the blades 11 are spirally arranged along the arc of the conical ridge surface.

During the use, as shown in the combination of fig. 1, the rotary driving device 40 drives the impeller 10 to rotate in the cavity formed between the rear protective plate 22, the front protective plate 21 and the volute 23 through the connecting shaft 30, the front cover plate 13 of the impeller 10 is provided with the bending part 131 to form a clearance fit surface with the front protective plate 21, the structure increases the sealing performance outside the impeller 10, the impeller 10 is not easy to be abraded, the structural strength is enhanced, the distance between the blade 11 and a pump opening is reduced, the blade wrap angle is increased, the length of the blade 11 is further improved, and the structure improves the pumping capacity of the slurry pump.

The control mode of the utility model is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of technicians in the field, which belongs to the common knowledge in the field, so the utility model does not explain the control mode and the circuit connection in detail.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. High-efficient sediment stuff pump, including impeller (10) and pump case (20), impeller (10) are including radial evenly distributed's blade (11), the both sides of blade (11) are provided with back shroud (12) and front shroud (13), its characterized in that: the front cover plate (13) is provided with a bending part (131) extending towards one side of an inlet of the impeller (10), and the blades (11) extend towards the direction of the inlet edge of the rotation center of the impeller (10) and are connected with the bending part (131).

2. The high efficiency slurry pump of claim 1, wherein: a front guard plate (21) is arranged in the pump shell (20) at a position corresponding to the front cover plate (13), and the front guard plate (21) is adaptive to the bending shape of the bending part (131) and forms a clearance fit conical surface.

3. The high efficiency slurry pump of claim 1 or 2, wherein: the blade (11) is designed into an arc-shaped section (111) with an arc-shaped axial plane section line at the inlet of the impeller (10).

4. The high efficiency slurry pump of claim 2, wherein: the blade (11) has a blade wrap angle a in the range of 160 to 200 degrees.

5. The high efficiency slurry pump of claim 3, wherein: the axial cross section of back shroud (12) is awl spine, blade (11) are along the spiral setting of awl spine arc.

6. The high efficiency slurry pump of claim 3, wherein: and auxiliary blades (101) are radially arranged on the outer side surfaces of the rear cover plate (12) and the front cover plate (13).

7. The high efficiency slurry pump of claim 2, wherein: the blade wrap angle alpha of the blade (11) is 180 degrees.

8. The high efficiency slurry pump of claim 2, wherein: the blade wrap angle alpha of the blade (11) is 260 degrees.

9. The high efficiency slurry pump of claim 2, wherein: the conical surface angle beta of the front cover plate (13) is set to be between 40 and 50 degrees.