CN210440221U

CN210440221U - Fixed auxiliary vane type pump chamber structure

Info

Publication number: CN210440221U
Application number: CN201921485541.2U
Authority: CN
Inventors: 易国雄; 钟代琼
Original assignee: Sichuan Chuangong Pump Industry Co ltd
Current assignee: Sichuan Chuangong Pump Industry Co ltd
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-05-01
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a fixed vice vane pump chamber structure, including the pump body, impeller, pump cover, pump shaft and supporting rack, the pump cover sets up in body one side, the supporting rack sets up in the pump cover outside, with pump body coupling and push down the pump cover, the pump shaft passes in the pump cover extends to the pump body, and lies in the combination department installation mechanical seal of pump cover, the impeller sets up in the pump body to fix at pump shaft tip, its characterized in that: the pump cover and the pump body are sealed in a conical surface contact manner; and a pump cover auxiliary blade is formed on one side of the pump cover facing the impeller and forms a damping gap with the impeller auxiliary blade. The utility model provides a fixed vice vane type pump chamber structure has simplified the structure, has improved sealed effect.

Description

Fixed auxiliary vane type pump chamber structure

Technical Field

The utility model relates to a pump technical field especially relates to a fixed auxiliary vane formula pump chamber structure.

Background

The pump body pump cover type pump chamber structure and the pump body pump cover auxiliary impeller type pump chamber structure are common pump chamber structures in the prior art. However. In the actual use process, the pump body pump cover type pump chamber structure and the pump body pump cover auxiliary impeller type pump chamber structure cause sealing failure due to high-pressure liquid in the pump chamber, particularly slag-discharging liquid impact, and normal use of the pump is affected.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome the problem that prior art exists, provide a fixed vice vane type pump chamber structure, simplified the structure, improved sealed effect.

The utility model adopts the technical proposal that:

the utility model provides a fixed vice vane type pump chamber structure, includes the pump body, impeller, pump cover, pump shaft and supporting rack, the pump cover sets up in body one side, the supporting rack sets up in the pump cover outside, with pump body coupling and push down the pump cover, the pump shaft passes in the pump cover extends to in the pump body, and lies in the combination department installation mechanical seal of pump cover, the impeller sets up in the pump body to fix at pump shaft tip, its characterized in that: the pump cover and the pump body are sealed in a conical surface contact manner; and a pump cover auxiliary blade is formed on one side of the pump cover facing the impeller and forms a damping gap with the impeller auxiliary blade.

Furthermore, a double-side groove type sealing ring is arranged at the joint of the pump body, the pump cover and the supporting frame.

Furthermore, a sealing ring is arranged between the front end of the front cover plate of the impeller and the inner wall of the pump body.

Furthermore, the impeller auxiliary blade and the pump cover auxiliary blade are in a vortex shape, and the vortex spiral direction of the pump cover auxiliary blade is opposite to the rotation direction of the impeller.

The utility model has the advantages that:

(1) the utility model discloses to the problem that exists among the prior art, designed a fixed auxiliary blade pump chamber structure, wherein constitute by parts such as the pump body, impeller. The pump cover is matched with the pump body in a taper manner, a fixed auxiliary blade is arranged on the pump cover, and a small damping gap is formed between the pump cover auxiliary blade and the impeller auxiliary blade. Therefore, the pump body and the pump cover are sealed in a rigid taper fit mode, and a double-side groove-shaped sealing ring is arranged outside the pump body to seal residual liquid on the conical surface. Because of the plugging of the conical surface matching, the residual leakage liquid has almost no pressure, excellent sealing and long service life.

(2) The utility model discloses in, fixed auxiliary blade and slot backward flow and little damping clearance fit for along the reduction of axial flow liquid pressure, the flow reduces, can improve the epaxial mechanical seal's of axle sealed efficiency.

(3) The utility model discloses in, compare in forms such as current impeller seal, lacked subassembly such as special impeller room, impeller, simplified the structure, improved sealed effect.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic diagram of a pump chamber of a pump cover type in the prior art.

Fig. 2 is a schematic diagram of a pump body and pump cover sub-impeller type pump chamber structure in the prior art.

Fig. 3 is a schematic view of the structure of the fixed auxiliary vane pump chamber according to the present invention.

Fig. 4 is a schematic view of a part a of the enlarged structure in fig. 3.

Fig. 5 is a schematic view of a part of the enlarged structure at B in fig. 3.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention.

Embodiments of the present invention/utility model will be described in detail below with reference to the drawings.

A pump body and pump cover type pump chamber structure in the prior art is shown in figure 1 and comprises a pump body 1 'and an impeller 2'

And a pump cover 3'. The pump cover 3 ' is arranged on one side of the pump body 1 ', is in plane contact sealing with the pump body 1, and is provided with a plane sealing ring 4 ' at the joint. The support frame 5 ' is arranged outside the pump cover 3 ' and adopts a compression bolt 6 '

And the pump body 1 ' and the pump cover 3 ' are connected and pressed tightly, so that the pump body 1 ' and the pump cover are kept in a locking and sealing state. Pump shaft 6'

One end extends into the pump body 1 'through the pump cover 3' and is provided with an impeller 2 ', a pump shaft 5' and the pump cover 3 'at the tail end'

A mechanical seal 7' is installed at the joint of (a). In the pump cover type pump chamber structure of the pump body, the single auxiliary blade is adopted, and the damping effect is effective. The pump body and the pump cover are in intermittent fit and are sealed in a plane, and the pump body faces high-pressure liquid in the pump chamber,

especially, the impact of liquid containing slag and the sealing are easy to lose efficacy.

The pump body and pump cover auxiliary impeller type pump chamber structure in the prior art is shown in the attached figure 2 and comprises a pump body 1 ", an impeller 2", an auxiliary impeller 3 ", a pump cover 4" and an auxiliary impeller chamber 5 ". The auxiliary impeller chamber 5 ' and the pump cover 4 ' are sequentially arranged on one side of the pump body 1 ', and the auxiliary impeller chamber 5 ' and the pump body 1 ', the auxiliary impeller 3 ' and the pump cover 4 ' as well as the pump body 1 ' and the pump cover 4 ' are sealed in a plane contact manner. The bearing frame 6 is arranged on the outer side of the pump cover 4, and is connected with the pump body 1 by the compression bolt 7 and compresses the pump body 1, the auxiliary impeller chamber 5 and the pump cover 4, so that the three are kept in a locking and sealing state. One end of the pump shaft 8 "extends into the pump body 1 through the pump cover 4" and the sub-impeller chamber 5 "and mounts the impeller 2" at its distal end portion. The auxiliary impeller 3 'is positioned in the area between the pump cover 4' and the auxiliary impeller chamber 5 'and is sleeved on the pump shaft 8'. And a mechanical seal 9 ' is arranged at the joint of the pump shaft 8 ' and the pump cover 4 '. In the pump body, the pump cover and the auxiliary impeller type pump chamber structure, on one hand, the number of components is large, the structure is complex, the assembly difficulty is increased, on the other hand, the pump body, the pump cover and the auxiliary impeller chamber are in intermittent fit, plane sealing is adopted, and sealing is easy to lose efficacy when high-pressure liquid, particularly slag-containing liquid, of the pump chamber is impacted.

A fixed auxiliary vane type pump chamber structure is shown in figures 3-5 and comprises a pump body 1, an impeller 2, a pump cover 3 and a support frame 4. The pump cover 2 is arranged on one side of the pump body 1 and is in conical surface contact sealing with the pump body 1. The bearing frame 4 is arranged on the outer side of the pump cover 3 and is connected with the pump body 1 by the compression bolt 5, so that the pump cover 3 and the pump body 1 are pressed by the bearing frame, and the connection sealing performance of the pump cover 3 and the pump body 1 is ensured. And a double-side groove-shaped sealing ring 6 is embedded at the joint of the pump cover 3, the pump body 1 and the supporting frame 4 to seal the residual liquid on the conical surface. One end of the pump shaft 7 passes through the pump cover 3 and extends into the pump body 1, the impeller 2 is arranged at the tail end of the pump shaft 7, and the mechanical seal 8 is arranged at the contact part of the pump shaft 7 and the pump cover 3. The impeller 2 comprises a front cover plate, blades, a rear cover plate and other parts, a sealing ring is arranged between the front end of the front cover plate and the inner wall of the pump body 1, and impeller auxiliary blades 21 are formed on the rear cover plate and are in a vortex shape. One side of the pump cover 3 facing the impeller 2 is formed with pump cover auxiliary blades 31 in a vortex shape, and the rotation direction of the pump cover auxiliary blades is opposite to that of the impeller 2. The impeller auxiliary blade 21 and the pump cover auxiliary blade 31 form a damping gap 9, so that the pressure of the fluid flowing along the shaft is reduced, the flow rate is reduced, and the mechanical sealing performance on the shaft can be improved.

The fixed auxiliary vane type pump chamber structure in the embodiment has the following characteristics:

(1) the pump cover is matched with the pump body in a taper manner, a fixed auxiliary blade is arranged on the pump cover, and a small damping gap is formed between the pump cover auxiliary blade and the impeller auxiliary blade. Therefore, the pump body and the pump cover are sealed in a rigid taper fit mode, and a double-side groove-shaped sealing ring is arranged outside the pump body to seal residual liquid on the conical surface. Because of the plugging of the conical surface matching, the residual leakage liquid has almost no pressure, excellent sealing and long service life.

(2) The fixed auxiliary blade and the groove reverse flow are in clearance fit with the small damping, so that the pressure of the fluid flowing along the shaft is reduced, the flow is reduced, and the sealing efficiency of the mechanical seal on the shaft can be improved.

(3) Compared with the existing auxiliary impeller sealing mode and other modes, the auxiliary impeller sealing mode has the advantages that components such as a special auxiliary impeller chamber and an auxiliary impeller are omitted, the structure is simplified, and the sealing effect is improved.

Claims

1. The utility model provides a fixed vice vane type pump chamber structure, includes the pump body, impeller, pump cover, pump shaft and supporting rack, the pump cover sets up in body one side, the supporting rack sets up in the pump cover outside, with pump body coupling and push down the pump cover, the pump shaft passes in the pump cover extends to in the pump body, and lies in the combination department installation mechanical seal of pump cover, the impeller sets up in the pump body to fix at pump shaft tip, its characterized in that: the pump cover and the pump body are sealed in a conical surface contact manner; and a pump cover auxiliary blade is formed on one side of the pump cover facing the impeller and forms a damping gap with the impeller auxiliary blade.

2. The fixed auxiliary vane pump chamber structure according to claim 1, wherein: and a double-side groove type sealing ring is arranged at the joint of the pump body, the pump cover and the supporting frame.

3. The fixed auxiliary vane pump chamber structure according to claim 1, wherein: and a sealing ring is arranged between the front end of the front cover plate of the impeller and the inner wall of the pump body.

4. The fixed auxiliary vane pump chamber structure according to claim 1, wherein: the impeller auxiliary blade and the pump cover auxiliary blade are in a vortex shape, and the vortex spiral direction of the pump cover auxiliary blade is opposite to the rotation direction of the impeller.