Single-stage end liquid suction ring self-suction centrifugal pump
By eccentrically arranging the self-priming impeller and sealing gland in the self-priming centrifugal pump to form a liquid ring structure, the problems of poor self-priming performance and inability to pump gas-containing media are solved, achieving efficient self-priming and safe transportation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN DEEP BLUE PUMP CO LTD
- Filing Date
- 2025-05-28
- Publication Date
- 2026-04-17
AI Technical Summary
Existing self-priming pumps have poor self-priming performance in gas-liquid mixing and re-separation. Self-priming pumps with self-priming tanks cannot pump gas-containing media, and there are problems with vacuum acquisition and maintenance.
Design a single-stage end-suction ring self-priming centrifugal pump. The self-priming impeller is eccentrically arranged in the cavity to form a variable volume working environment. Suction and exhaust ports are opened on the pump cover. The eccentrically arranged self-priming impeller and the sealing gland form a liquid ring to achieve self-priming and degassing.
It improves self-priming performance, enabling the pumping of media in high vacuum environments, reducing the risk of explosion. Its simple and compact structure makes it easy to install and maintain, suitable for various working conditions, and reduces user costs.
Smart Images
Figure CN224134829U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a single-stage self-priming centrifugal pump with an end suction ring, and particularly to a single-stage self-priming centrifugal pump that achieves self-priming and conveys gas-containing media. Background Technology
[0002] Current self-priming pumps, such as gas-liquid mixing pumps, utilize the principle of gas-liquid mixing and then separation, resulting in poor self-priming performance; self-priming pumps with self-priming tanks cannot pump gas-containing media, all of which have defects.
[0003] In view of the problems existing in the above-mentioned existing technologies, it is necessary to study and design a new type of single-stage end-suction ring self-priming centrifugal pump to overcome the problems existing in the existing technologies. Summary of the Invention
[0004] To address the shortcomings of existing technologies, such as poor self-priming performance due to vacuum acquisition and maintenance issues, and the inability to pump gaseous or hazardous media, a single-stage end-suction ring self-priming centrifugal pump is provided. This invention primarily utilizes an eccentrically arranged self-priming impeller within the cavity to create a variable-volume working environment, while simultaneously providing suction and exhaust ports, thereby achieving both self-priming and degassing effects.
[0005] The technical means adopted in this utility model are as follows:
[0006] A single-stage self-priming centrifugal pump with end suction ring includes: a pump cover, a mechanical seal, an impeller, and a pump shaft; the impeller and the mechanical seal are clamped and mounted on the pump shaft; the pump shaft is mounted on the pump cover; a mechanical seal is provided between the pump shaft and the pump cover.
[0007] Furthermore, a sealing gland is bolted to the pump cover, and the sealing gland is mounted on the pump shaft;
[0008] Furthermore, a mechanical seal is provided between the pump shaft and the pump cover;
[0009] Furthermore, a self-priming impeller is added to the back of the impeller, and the self-priming impeller is mounted on the pump shaft along with the impeller;
[0010] Furthermore, the self-priming impeller, together with the pump cover and sealing gland, forms the liquid ring cavity of the centrifugal pump.
[0011] Furthermore, the sealing gland is connected to the mechanical seal;
[0012] Furthermore, the mechanical seal is an aircraft-mounted mechanical seal, with its stationary ring portion installed on the sealing gland and its outer ring portion installed on the sealing bushing. The sealing bushing is clamped and driven by the self-priming impeller.
[0013] Furthermore, the self-priming impeller is clamped to the mechanical seal and then driven by friction after being locked by the screws on the shaft head.
[0014] Furthermore, the self-priming impeller and mechanical seal are eccentrically arranged with the sealing gland. When they rotate, they throw the liquid toward the sealing gland and form a liquid ring concentric with the sealing gland. The liquid ring and the rotor blades form a rotary variable displacement centrifugal pump with periodically changing volume, giving the pump the ability to self-prime and draw a vacuum.
[0015] Furthermore, the self-priming impeller adopts forward-curved blades to improve self-priming performance.
[0016] The working process of this utility model is as follows:
[0017] Liquid ring self-priming pumps work by extracting gas and creating a low-pressure environment through the principle of volume change. The steps are as follows:
[0018] 1. Before starting, the working medium is introduced into the pump. When the impeller rotates, a ring of equal thickness, also known as a liquid ring, is formed in the pump cavity.
[0019] 2. Inhalation stage: Inhalation ports are opened in the cavity from small to large, and the gas pressure gradually decreases from high to low. When the pressure is lower than the pressure at the inhalation port, external gas is drawn into the working chamber through the inhalation port.
[0020] 3. Gas compression stage: After the impeller rotates to the maximum volume of the working chamber between the liquid ring and the blades, the volume decreases as the impeller continues to rotate, the pressure increases, and the gas is compressed.
[0021] 4. Exhaust stage: When the working chamber volume is reduced to the minimum value, the gas is discharged from the pump body through the exhaust port. The working process of the liquid ring self-priming pump is suction-compression-exhaust.
[0022] Compared with the prior art, the present invention has the following advantages:
[0023] 1. The single-stage self-priming centrifugal pump with end-suction ring provided by this utility model has a self-priming impeller and a sealing gland arranged eccentrically. When rotating, the water is thrown towards the sealing gland by centrifugal force and forms a liquid ring of equal thickness concentric with the gland. The surfaces of the self-priming impeller, pump cover and sealing gland form small cavities that are not interconnected and have different volumes. As the self-priming impeller rotates, its volume changes. The suction port is opened in the range of the cavity from small to large, and the gas pressure gradually decreases from high to low. Conversely, the gas pressure gradually increases from low to high in the range of the cavity from large to small. When it is connected to the exhaust port, the gas is discharged. This continuous process of suction, compression and exhaust keeps a high vacuum low-pressure environment in the liquid ring cavity, so that the pump has the ability to suck up the medium.
[0024] 2. The single-stage end-suction ring self-priming centrifugal pump provided by this utility model can select different liquids as the working medium of the liquid ring according to the properties of the medium being transported. The working medium also plays a role in sealing and energy transfer in the pump system. When pumping toxic and harmful gases, the presence of the liquid ring during the gas compression process results in very small changes in turbulence during compression. This makes it less likely to cause an explosion when transporting dangerous media, thus improving safety.
[0025] 3. The single-stage self-priming centrifugal pump with end suction ring provided by this utility model has excellent self-priming performance, compact and simple structure, and is easy for users to install, maintain and operate.
[0026] 4. The single-stage end-suction ring self-priming centrifugal pump provided by this utility model is suitable for various working conditions and self-priming and degassing applications. In some working conditions, it can replace the VS4 long-shaft submersible pump, reducing user costs and improving product competitiveness.
[0027] 5. The single-stage end-suction ring self-priming centrifugal pump provided by this utility model is widely used in general industries such as chemical, food, and papermaking, as well as in technical fields such as petroleum and natural gas, pharmaceuticals, energy, pulp and paper, food processing, and polyester fiber that require self-priming and venting.
[0028] 6. The single-stage end-suction ring self-priming centrifugal pump provided by this utility model can transport various clean liquids, liquids containing solid particles, light components, long fibers, abrasive liquids, gas-containing media, as well as mud and pulp.
[0029] In summary, the technical solution of this utility model solves the problems of poor self-priming performance caused by vacuum acquisition and maintenance issues in the prior art, as well as the inability to pump gaseous and hazardous media. Attached Figure Description
[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0031] Figure 1 This is a schematic diagram of the structure of this utility model;
[0032] Figure 2 This is a schematic diagram of the assembly of the self-priming impeller and the sealing gland of this utility model.
[0033] In the diagram: 1. Self-priming impeller; 2. Pump cover; 3. Sealing gland; 4. Mechanical seal; 5. Impeller; 6. Pump shaft; 7. Sealing sleeve. Detailed Implementation
[0034] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0035] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0037] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.
[0038] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0039] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0041] like Figure 1 , 2 As shown, this utility model provides a single-stage end-suction ring self-priming centrifugal pump, including: a pump cover 2, a mechanical seal 4, an impeller 5, and a pump shaft 6; the impeller 5 and the mechanical seal 4 are clamped and installed on the pump shaft 6; the pump shaft 6 is mounted on the pump cover 2; a mechanical seal 4 is provided between the pump shaft 6 and the pump cover 2;
[0042] A sealing gland 3 is bolted onto the pump cover 2 and is mounted on the pump shaft 6. A mechanical seal 4 is provided between the pump shaft 6 and the pump cover 2. A self-priming impeller 1 is added to the back of the impeller 5 and is mounted on the pump shaft 6 along with the impeller 5. The self-priming impeller 1, the pump cover 2, and the sealing gland 3 together form the liquid ring cavity of the centrifugal pump.
[0043] The sealing gland 3 is connected to the mechanical seal 4; the mechanical seal 4 is an aircraft-mounted mechanical seal, with its stationary ring part installed on the sealing gland 3 and its east ring part installed on the sealing bushing 7. The sealing bushing 7 is clamped and driven by the self-priming impeller 1.
[0044] The self-priming impeller 1 is clamped to the mechanical seal 4 and then driven by friction after being locked by the screw on the shaft head.
[0045] The self-priming impeller 1 and mechanical seal 4 are eccentrically arranged with the sealing gland 3. When they rotate, they throw the liquid toward the sealing gland 3 and form a liquid ring concentric with the sealing gland 3. The liquid ring and the rotor blades form a rotary variable displacement centrifugal pump with periodic volume changes, which enables the pump to have the ability to self-prime and pump vacuum.
[0046] The self-priming impeller 1 uses forward-curved blades to improve self-priming performance.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A single stage, end suction, ring and bell self-priming centrifugal pump comprising: Pump cover (2), mechanical seal (4), impeller (5) and pump shaft (6); The impeller (5) and the mechanical seal (4) are clamped and mounted on the pump shaft (6); the pump shaft (6) is mounted on the pump cover (2); a mechanical seal (4) is provided between the pump shaft (6) and the pump cover (2); characterized in that: A sealing gland (3) is bolted onto the pump cover (2), and the sealing gland (3) is mounted on the pump shaft (6); A mechanical seal (4) is provided between the pump shaft (6) and the pump cover (2); A self-priming impeller (1) is added to the back of the impeller (5), and the self-priming impeller (1) and the impeller (5) are mounted on the pump shaft (6); The self-priming impeller (1), pump cover (2), and sealing gland (3) together form the liquid ring cavity of the centrifugal pump.
2. The single-stage self-priming centrifugal pump with end suction ring according to claim 1, characterized in that: The sealing gland (3) is connected to the mechanical seal (4); The mechanical seal (4) is an aircraft mechanical seal, with its stationary ring part installed on the sealing cover (3) and its east ring part installed on the sealing bushing (7). The sealing bushing (7) is clamped and driven by the self-priming impeller (1).
3. The single-stage self-priming centrifugal pump with end suction ring according to claim 1, characterized in that: The self-priming impeller (1) is clamped to the mechanical seal (4) and driven by friction after being locked by the screw on the shaft head.
4. The single-stage self-priming centrifugal pump with end suction ring according to claim 3, characterized in that: The self-priming impeller (1) and mechanical seal (4) are eccentrically arranged with the sealing cover (3). When they rotate, they throw the liquid toward the sealing cover (3) and form a liquid ring concentric with the sealing cover (3). The liquid ring and the rotor blades form a rotary variable displacement centrifugal pump with periodic volume change, which enables the pump to have the ability to self-prime and pump vacuum.
5. The single-stage self-priming centrifugal pump with end suction ring according to claim 1, characterized in that: The self-priming impeller (1) adopts forward-curved blades to improve self-priming performance.