Sealing ring structure of large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for pump station
By adopting a sealing structure composed of the housing port ring and O-ring in the pump station for a large flow and high lift level, the problem of no O-ring seal between the seal ring and the shell is solved, and the stability of the seal ring and the efficient operation of the pump is achieved.
Patent Information
- Application Number
- CN202422309839.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The existing pump stations use large flow and high-head level medium-opening horizontal multi-stage centrifugal pumps with no O-ring seal between the sealing ring and the housing, resulting in damage to the sealing ring and impeller, low pump efficiency, increased power consumption, unstable operation, and reduced pump service life.
The sealing structure consisting of the shell port ring and O-ring is adopted to replace the original O-ring-free sealing structure. The O-ring grooves are processed on the outside and the O-ring are assembled. The anti-rotation boss is positioned to ensure the stability between the sealing ring and the pump body and the pump cover.
Effectively prevent sealing ring erosion, improve the operating stability and efficiency of the pump, reduce power consumption, and extend the service life of the pump.
Smart Images
Figure CN223164733U_ABST
Abstract
Description
Technical Field
[0001] The present utility model relates to a seal ring structure of a large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station, belonging to the technical field of fluid machinery. Specifically, it particularly relates to a novel seal ring structure for a large-flow high-lift horizontal split horizontal multi-stage centrifugal pump used in a pumping station. Background Art
[0002] The large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station is widely used in the transportation of various pumping stations such as irrigation pumping stations, drainage pumping stations, water supply pumping stations, water transmission pumping stations, and pressurized pumping stations, and is suitable for transporting various clean or slightly solid-particle-containing and easily precipitable media.
[0003] Currently, there is no O-ring seal between the seal ring and the housing of the large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station. It only relies on the clearance fit between the inner hole of the housing and the outer circle of the seal ring. Due to the lack of O-ring seal, there is leakage between the pump body and the seal ring. As the pump runs for a longer time, it will cause erosion at the joint between the seal ring and the housing, resulting in serious damage to the pump's seal ring and impeller, thereby leading to a series of problems such as low pump efficiency, increased power consumption, unstable pump operation, and reduced pump service life, and further increasing the safety hazards and economic losses of the pumping station.
[0004] In view of the problems existing in the above-mentioned prior art, it is very necessary to research and design a novel seal ring structure for a large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station, so as to overcome the problems existing in the prior art. Summary of the Invention
[0005] Due to the technical problems that there is no O-ring seal between the seal port ring and the housing, which will cause serious damage to the seal ring and impeller, low pump efficiency, increased power consumption, unstable pump operation, and reduced pump service life during long-term operation as proposed in the above-mentioned prior art, a seal ring structure of a large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station is provided. The present utility model mainly replaces the original seal ring structure without O-ring seal with a seal ring structure composed of each housing port ring and O-ring, thereby solving the problems such as seal ring erosion, reduced pump efficiency, increased power consumption, serious damage to the seal ring and impeller, and unstable operation that occur when the existing large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for a pumping station is in operation.
[0006] The technical means adopted by the present utility model are as follows:
[0007] A sealing ring structure for a large-flow and high-lift horizontal split horizontal multi-stage centrifugal pump used in a pumping station, comprising: a pump cover, a single-suction impeller, an inter-stage shaft sleeve, a double-suction impeller and a pump body; the single-suction impeller, the inter-stage shaft sleeve, the double-suction impeller, the inter-stage shaft sleeve and the single-suction impeller are sleeved on the shaft and encapsulated in the pump body through the pump cover; a housing wearing ring is assembled at the single-suction impeller, the inter-stage shaft sleeve and the double-suction impeller; further, the housing wearing ring assembled at the single-suction impeller is replaced by a single-suction impeller housing wearing ring;
[0008] Further, the housing wearing ring assembled at the inter-stage shaft sleeve is replaced by a hub housing wearing ring;
[0009] Further, the housing wearing ring assembled at the double-suction impeller is replaced by a double-suction impeller housing wearing ring.
[0010] Further, at least two O-ring grooves are machined on the outer side of the single-suction impeller housing wearing ring, and O-rings are assembled for sealing between the single-suction impeller housing wearing ring and the pump cover.
[0011] Further, at least two O-ring grooves are machined on the outer side of the hub housing wearing ring, and O-rings are assembled for sealing between the hub housing wearing ring and the pump body.
[0012] Further, at least two O-ring grooves are machined on the outer side of the double-suction impeller housing wearing ring, and O-rings are assembled for sealing between the double-suction impeller housing wearing ring and the pump body.
[0013] Further, anti-rotation bosses are machined on the outer side walls of the single-suction impeller housing wearing ring, the hub housing wearing ring and the double-suction impeller housing wearing ring;
[0014] Further, the anti-rotation bosses are placed into the grooves machined on the inner side walls of the pump cover and the pump body to position the single-suction impeller housing wearing ring, the hub housing wearing ring and the double-suction impeller housing wearing ring.
[0015] Compared with the prior art, the present utility model has the following advantages:
[0016] 1. For the sealing ring structure of the large-flow and high-lift horizontal split horizontal multi-stage centrifugal pump used in the pumping station provided by the present utility model, an anti-rotation boss is machined on the outer circle of the sealing ring, which is integral with the sealing ring and replaces the anti-rotation pin that is separated from the original sealing ring. Therefore, when assembling the wearing ring, there is no need to assemble the anti-rotation pin. The structure is novel, the design is convenient, the modification to the original structure is small, which can not only reduce assembly mistakes and save assembly time, but also prevent damage to the pin hole of the sealing ring and failure of the positioning pin due to erosion.
[0017] 2. The seal ring structure of the large-flow and high-lift horizontal split multi-stage centrifugal pump for pumping stations provided by the present utility model has O-ring grooves opened on both sides of the outer circumference of the seal ring. By assembling the O-ring into the O-ring groove, the stability of the sealing interface between the seal ring and the pump body and pump cover can be maintained, preventing medium leakage and thus preventing erosion of the seal ring.
[0018] In summary, the technical solution of the present utility model solves the problems in the prior art that due to the absence of O-ring seals between the sealing mouth ring and the housing, during long-term operation, the seal ring and impeller will be severely damaged, the pump efficiency will be low, the power consumption will increase, the pump operation will be unstable, and the service life of the pump will be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0020] Figure 1 It is a schematic structural diagram of the present utility model;
[0021] Figure 2 It is a schematic structural diagram of the housing mouth ring of the present utility model.
[0022] In the figure: 1. Pump cover; 2. O-ring; 3. Single-suction impeller housing mouth ring; 4. Single-suction impeller; 5. Hub housing mouth ring; 6. Intermediate shaft sleeve; 7. Double-suction impeller housing mouth ring; 8. Double-suction impeller; 9. Pump body; 10. Anti-rotation boss. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine the embodiments to detail the present utility model.
[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present utility model and its application or use. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.
[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments of the present utility model. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0026] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be clear that, for the sake of convenience in description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorized specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters indicate like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0027] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom" are generally based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Without contrary instructions, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present utility model. The orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.
[0028] For ease of description, spatial relative terms such as "above", "over", "on the upper surface", "upper", etc. can be used here to describe the spatial positional relationship of a device or feature shown in the figure with other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation described in the figure for the device. For example, if the device in the attached drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations are made for the spatial relative descriptions used here.
[0029] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings, and thus should not be construed as limiting the protection scope of the present utility model.
[0030] As Figure 1 As shown, the present utility model provides a seal ring structure for a large-flow and high-head horizontal split multi-stage centrifugal pump used in a pumping station, including: a pump cover 1, a single-suction impeller 4, an inter-stage shaft sleeve 6, a double-suction impeller 8, and a pump body 9; the single-suction impeller 4, the inter-stage shaft sleeve 6, the double-suction impeller 8, the inter-stage shaft sleeve 6, and the single-suction impeller 4 are sleeved on the shaft and are encapsulated in the pump body 9 through the pump cover 1; a casing gland is assembled at the single-suction impeller 4, the inter-stage shaft sleeve 6, and the double-suction impeller 8; the casing gland assembled at the single-suction impeller 4 is replaced by a single-suction impeller casing gland 3; the casing gland assembled at the inter-stage shaft sleeve 6 is replaced by a hub casing gland 5; the casing gland assembled at the double-suction impeller 8 is replaced by a double-suction impeller casing gland 7.
[0031] As Figure 1 As shown, at least two O-ring grooves are machined on the outer side of the single-suction impeller casing gland 3, and an O-ring 2 is assembled for sealing between the single-suction impeller casing gland 3 and the pump cover 1. At least two O-ring grooves are machined on the outer side of the hub casing gland 5, and an O-ring 2 is assembled for sealing between the hub casing gland 5 and the pump body 9. At least two O-ring grooves are machined on the outer side of the double-suction impeller casing gland 7, and an O-ring 2 is assembled for sealing between the double-suction impeller casing gland 7 and the pump body 9. At the mating part of the sealing casing gland with the pump body and the pump cover, the stability of the sealing interface between the seal ring and the pump body and the pump cover is maintained to prevent medium leakage, thereby preventing erosion of the seal ring.
[0032] As Figure 2As shown in the figure, anti-rotation bosses 10 are machined on the outer side walls of the single-suction impeller housing gland 3, the hub housing gland 5, and the double-suction impeller housing gland 7; the anti-rotation bosses 10 are placed in the grooves machined on the inner side walls of the pump cover 1 and the pump body 9 to position the single-suction impeller housing gland 3, the hub housing gland 5, and the double-suction impeller housing gland 7. When assembling each gland, there is no need to assemble anti-rotation pins. The structure is novel, the design is convenient, the modification to the original structure is small, which can not only reduce assembly errors and save assembly time, but also prevent the damage of the sealing ring pin holes and the failure of the positioning pins caused by erosion.
[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.
Claims
1. A seal ring structure of a large-flow and high-lift horizontal split multi-stage centrifugal pump for a pumping station, comprising: Pump cover (1), single-suction impeller (4), intermediate shaft sleeve (6), double-suction impeller (8) and pump body (9); The single-suction impeller (4), intermediate shaft sleeve (6), double-suction impeller (8), intermediate shaft sleeve (6) and single-suction impeller (4) are sleeved on the shaft and encapsulated in the pump body (9) through the pump cover (1); A casing gland is assembled at the single-suction impeller (4), intermediate shaft sleeve (6) and double-suction impeller (8); It is characterized in that: The casing gland assembled at the single-suction impeller (4) is replaced by a single-suction impeller casing gland (3); The casing gland assembled at the intermediate shaft sleeve (6) is replaced by a hub casing gland (5); The casing gland assembled at the double-suction impeller (8) is replaced by a double-suction impeller casing gland (7).
2. The seal ring structure of the large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for pumping stations according to claim 1, characterized in that: At least two O-ring grooves are machined on the outer side of the single-suction impeller casing gland (3), and O-rings (2) are assembled for sealing between the single-suction impeller casing gland (3) and the pump cover (1).
3. The seal ring structure of the large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for pumping stations according to claim 1, characterized in that: At least two O-ring grooves are machined on the outer side of the hub casing gland (5), and O-rings (2) are assembled for sealing between the hub casing gland (5) and the pump body (9).
4. The seal ring structure of the large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for pumping stations according to claim 1, characterized in that: At least two O-ring grooves are machined on the outer side of the double-suction impeller casing gland (7), and O-rings (2) are assembled for sealing between the double-suction impeller casing gland (7) and the pump body (9).
5. The seal ring structure of the large-flow high-lift horizontal split horizontal multi-stage centrifugal pump for pumping stations according to claim 1, characterized in that: Anti-rotation bosses (10) are machined on the outer side walls of the single-suction impeller casing gland (3), hub casing gland (5) and double-suction impeller casing gland (7); The anti-rotation bosses (10) are placed in the grooves machined on the inner side walls of the pump cover (1) and the pump body (9) to position the single-suction impeller casing gland (3), hub casing gland (5) and double-suction impeller casing gland (7).