CN213808226U

CN213808226U - Balance drum structure

Info

Publication number: CN213808226U
Application number: CN202021685249.8U
Authority: CN
Inventors: 周宇; 刘锦; 丁海峰; 丁世琼; 付仲金
Original assignee: DALIAN DEEP BLUE PUMP CO LTD
Current assignee: DALIAN DEEP BLUE PUMP CO LTD
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-07-27
Anticipated expiration: 2030-08-13

Abstract

The utility model discloses balanced drum structure relates to centrifugal pump design technical field, especially relates to the balanced drum structure who is applicable to both ends support multistage centrifugal pump. The utility model is used for the axial force balance of the multistage centrifugal pump; the method comprises the following steps: the balance drum, the balance sleeve, the adjusting ring, the snap ring sleeve and the fastener; the balance drum is sleeved on the pump shaft and is fixed on the pump shaft through an adjusting ring, a snap ring sleeve and a fastener; the balance sleeve is sleeved outside the balance drum and is fixed on the shell through fastening screws. A narrow annular gap is formed between the balance sleeve and the balance drum. The inner wall of the balance sleeve is provided with a spiral groove. The spiral groove is a single-head or multi-head spiral groove which hinders the reverse direction of medium flow. N annular grooves are uniformly distributed on the inner wall of the balance sleeve, and the sectional area of each annular groove is larger than that of each spiral groove. The technical scheme of the utility model the current among the prior art does not have the slot or only in helicla flute or the annular groove has been solved, though can reduce multistage centrifugal pump efficiency loss, still can not reach the problem of anticipated effect.

Description

Balance drum structure

Technical Field

The utility model discloses balanced drum structure relates to centrifugal pump design technical field, especially relates to the balanced drum structure who is applicable to both ends support multistage centrifugal pump.

Background

The multistage centrifugal pump is an industrial device commonly used in industrial devices, and is widely applied to devices such as petrochemical industry, coal chemical industry, power supply, urban water supply, water treatment and the like. The existing multistage centrifugal pump with two supporting ends adopts the structural design that the inner hole of a balance sleeve is not provided with a groove, or only provided with a spiral groove, or only provided with an annular groove, and can not achieve satisfactory effects on the capacity of reducing the volume loss of the multistage centrifugal pump and improving the pump efficiency. The efficiency losses due to the multistage centrifugal pump include: hydraulic losses, mechanical losses and volumetric losses, and therefore, reducing volumetric losses is an important means of improving the efficiency of a multistage centrifugal pump.

In view of the above problems in the prior art, it is necessary to develop a novel balance drum structure to overcome the problems in the prior art.

Disclosure of Invention

According to one of the conventional non-groove, spiral groove or annular groove proposed in the above prior art, although the efficiency loss of the multistage centrifugal pump can be reduced, the technical problem that the desired effect cannot be achieved is provided, and a balance drum structure is provided. The utility model discloses mainly utilize reverse helicla flute and annular groove's collocation design, improve the resistance loss in balanced cover and the balanced drum interval, reduce the clearance flow, reduce the volume loss to improve the efficiency of multistage centrifugal pump.

The utility model discloses a technical means as follows:

a balance drum structure is used for axial force balance of a multistage centrifugal pump; the method comprises the following steps: the balance drum, the balance sleeve, the adjusting ring, the snap ring sleeve and the fastener;

furthermore, the balance drum is sleeved on the pump shaft and is fixed on the pump shaft through an adjusting ring, a snap ring sleeve and a fastener;

further, the balance sleeve is sleeved outside the balance drum and fixed on the shell through fastening screws.

Further, a narrow annular gap is formed between the balance sleeve and the balance drum.

Furthermore, the inner wall of the balance sleeve is provided with a spiral groove.

Further, the spiral groove is a single-start or multi-start spiral groove that hinders the reverse direction of the medium flow.

Furthermore, N annular grooves are uniformly distributed on the inner wall of the balance sleeve, and the sectional area of each annular groove is larger than that of each spiral groove.

After adopting above-mentioned structure, when the multistage centrifugal pump operates, one side forms the high pressure, and the opposite side forms the low pressure. Under the influence of the pressure difference, there is a flow of liquid through the small gap between the balancing sleeve and the balancing drum. When the liquid flows through the small gap, the liquid is influenced by the resistance of the reverse spiral groove on the balance sleeve, and the on-way loss and the local loss are increased. The liquid flow is in the annular trench position that is slightly bigger, because the change of the area that flows through, can form local loss, further increase the liquid flow resistance to realize reducing clearance flow, reduce the volume loss, improve multistage centrifugal pump efficiency.

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

the utility model provides a balanced drum structure, through not having the slot at former balanced cover, or independent helicla flute, or outside the design of independent ring channel, provides the design of a helicla flute and ring channel combination, makes multistage centrifugal pump volumetric efficiency improve, reaches energy saving and consumption reduction's purpose.

To sum up, use the technical scheme of the utility model the current nothing slot, only in helicla flute or the annular groove have been solved, although can reduce multistage centrifugal pump efficiency loss, still can not reach the problem of anticipated effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is an enlarged view of section I of FIG. 1;

FIG. 3 is a schematic view of the structure of the balance sleeve of the present invention;

fig. 4 is an enlarged view of fig. 3 ii.

In the figure: 1. the pump shaft 2, the balance drum 3, the balance sleeve 4, the shell 5, the adjusting ring 6, the snap ring 7, the snap ring sleeve 8, the fastening piece 9, the spiral groove 10 and the annular groove.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element in question must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

As shown in the figures, the utility model provides a balance drum structure for the axial force balance of a multistage centrifugal pump; the method comprises the following steps: the balance drum 2, the balance sleeve 3, the adjusting ring 5, the snap ring 6, the snap ring sleeve 7 and the fastener 8; the balance drum 2 is sleeved on the pump shaft 1 and is fixed on the pump shaft 1 through an adjusting ring 5, a clamping ring 6, a clamping ring sleeve 7 and a fastener 8; the balance sleeve 3 is sleeved outside the balance drum 2 and is fixed on the shell 4 through fastening screws.

A narrow annular gap is formed between the balance sleeve 3 and the balance drum 2.

The inner wall of the balance sleeve 3 is provided with a spiral groove 9.

The spiral groove 9 is a single-start or multi-start spiral groove 9 that impedes the reverse direction of the medium flow.

N annular grooves 10 are uniformly distributed on the inner wall of the balance sleeve 3, and the sectional area of each annular groove 10 is larger than that of each spiral groove 9.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The balance drum structure is characterized in that the balance drum structure is used for axial force balance of a multistage centrifugal pump; the method comprises the following steps: the balance drum (2), the balance sleeve (3), the adjusting ring (5), the snap ring (6), the snap ring sleeve (7) and the fastener (8);

the balance drum (2) is sleeved on the pump shaft (1) and is fixed on the pump shaft (1) through an adjusting ring (5), a snap ring (6), a snap ring sleeve (7) and a fastener (8);

the balance sleeve (3) is sleeved outside the balance drum (2) and is fixed on the shell (4) through a fastening screw;

a narrow annular gap is formed between the balance sleeve (3) and the balance drum (2);

the inner wall of the balance sleeve (3) is provided with a spiral groove (9);

n annular grooves (10) are uniformly distributed on the inner wall of the balance sleeve (3).

2. A balancing drum construction according to claim 1, characterized in that the spiral groove (9) is a single-start or multi-start spiral groove (9) hindering the reversal of the medium flow.

3. A balancing drum construction according to claim 1, characterized in that the annular groove (10) has a larger cross-sectional area than the spiral groove (9).