Guide vane small flow centrifugal pump

Abstract

The guide vane type small flow centrifugal pump of the present invention is suitable for the technical field of conveying clean or low-temperature or high-temperature, flammable, explosive, and highly corrosive media in the petroleum, petrochemical and chemical industries. It is a horizontal, radially split, guide vane type small flow centrifugal pump. The present invention includes: a pump body, guide vanes, impellers, mouth rings, pump covers, sealing components and bearing components; the mouth rings are mounted on the impellers; the pump covers are mounted on the bearing components; the impellers are mounted on the pump shaft and then encapsulated on the pump cover through guide vanes to form an impeller working chamber; the pump body is fastened to the pump cover by bolts, and the guide vanes and impellers are encapsulated between the pump cover and the pump body; a sealing component is installed between the pump shaft and the pump cover for sealing. The technical solution of the present invention solves the problem in the prior art that in order to meet different performance parameters, a variety of pump bodies and impellers need to be developed to meet the needs.

Description

Technical Field

[0001] The guide vane small flow centrifugal pump of the present invention is suitable for the technical field of conveying clean or low-temperature or high-temperature, flammable, explosive, and highly corrosive media in the petroleum, petrochemical and chemical industries. It is a horizontal, radially split, guide vane small flow centrifugal pump. Background Art

[0002] Small flow and high head centrifugal pumps are widely used in various industries. They are small batch and multi-variety pumps. With the development of society, the parameters of various industries are constantly updated and diversified, and the performance requirements of pumps such as flow and head are constantly changing. According to the previous design and manufacturing concepts, it is necessary to develop a variety of hydraulic components, such as pump bodies and impellers, to meet market demand, which requires huge time and cost investment.

[0003] In view of the problems existing in the above-mentioned prior art, it is very necessary to study and design a new type of guide vane small flow centrifugal pump to overcome the problems existing in the prior art. Summary of the invention

[0004] According to the technical problem proposed in the above prior art that in order to meet different performance parameters, a variety of pump bodies and impellers need to be developed to meet the needs, a guide vane type small flow centrifugal pump is provided. The present invention mainly adjusts product performance by developing a guide vane type water pressure chamber and its adjustable outlet throat area, so that the pump body and impeller do not need to be replaced, and the changing market requirements can be met, effectively reducing costs.

[0005] The technical means adopted by the present invention are as follows:

[0006] A guide vane type small flow centrifugal pump comprises: a pump body, a guide vane, an impeller, a mouth ring, a pump cover, a sealing component and a bearing component;

[0007] Further, the mouth ring is mounted on the impeller;

[0008] Further, the pump cover is mounted on the bearing component;

[0009] Furthermore, after the impeller is mounted on the pump shaft, it is packaged on the pump cover through the guide vane to form an impeller working chamber;

[0010] Furthermore, the pump body is fastened to the pump cover by bolts, and the guide vanes and the impeller are encapsulated between the pump cover and the pump body;

[0011] Furthermore, a sealing component is installed between the pump shaft and the pump cover for sealing.

[0012] Furthermore, the pump body adopts a central outflow structure, and there is no need to set an exhaust valve; an annular flow channel is adopted, which is convenient for casting, shortens the manufacturing cycle, and reduces costs.

[0013] Furthermore, a pressure water chamber is provided on the guide vane, and the throat area at the inlet of the diffusion section of the pressure water chamber changes with the change of performance requirements; the medium flows into the pump body through the diffusion section, and then flows out from the pump body outlet; without replacing the pump body and impeller, the throat area of ​​the diffusion section of the guide vane is changed to achieve performance adjustment, thereby maximizing product interchangeability, reducing the types of spare parts, and reducing management costs.

[0014] Furthermore, a replaceable mouth ring is installed between the impeller and the pump cover; the impeller with mouth ring structure increases rotor support, reduces vibration risks, and ensures long-term stable operation of the unit.

[0015] Furthermore, the rotor of the bearing component adopts a front and rear adjustable structure; the clearance between the impeller and the guide vane can be adjusted without dismantling the pump, thereby ensuring the efficiency of the pump and improving the energy efficiency of the unit.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. The guide vane type small flow centrifugal pump provided by the present invention can change the throat area of ​​the guide vane diffusion section to meet the performance requirements when the performance requirements change. It is not necessary to replace the pump body, impeller and other parts, which improves the interchangeability of the product, reduces the types of spare parts, and reduces management costs.

[0018] 2. The guide vane type small flow centrifugal pump provided by the present invention, a full range of small flow pumps, only need a few pump bodies, pump covers, impellers, bearing components, and different guide vanes can be configured to achieve full range of performance adjustment

[0019] 3. The guide vane small flow centrifugal pump provided by the present invention has a simple product structure, is easy to manufacture, install, maintain and inspect, operates safely and reliably, saves energy and reduces emissions, and brings considerable economic benefits to enterprises.

[0020] In summary, the technical solution of the present invention solves the problem in the prior art that in order to meet different performance parameters, a variety of pump bodies and impellers need to be developed to meet the needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the guide vane structure of the present invention.

[0024] In the figure: 1, pump body 2, guide vane 3, impeller 4 mouth ring, 5, pump cover 6, sealing component 7, bearing component 8, water pressure chamber 9, throat. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] As shown in the figure, the present invention provides a guide vane small flow centrifugal pump including: a pump body 1, a guide vane 2, an impeller 3, a mouth ring 4, a pump cover 5, a sealing component 6 and a bearing component 7; the mouth ring 4 is mounted on the impeller 3; the pump cover 5 is mounted on the bearing component 7; the impeller 3 is mounted on the pump shaft and then encapsulated on the pump cover 5 through the guide vane 2 to form an impeller working chamber; the pump body 1 is fastened to the pump cover 5 by bolts, and the guide vane 2 and the impeller 3 are encapsulated between the pump cover 5 and the pump body 1; a sealing component 6 is installed between the pump shaft and the pump cover 5 for sealing.

[0033] The pump body 1 adopts a central outflow structure, and does not need to be provided with an exhaust valve; it adopts an annular flow channel, which is convenient for casting, shortens the manufacturing cycle, and reduces costs.

[0034] A pressure water chamber 8 is provided on the guide vane 2, and the area of ​​the throat 9 at the inlet of the diffusion section of the pressure water chamber 8 changes with the change of performance requirements; the medium flows into the pump body 1 through the diffusion section, and then flows out from the outlet of the pump body 1; without replacing the pump body and impeller, the area of ​​the throat 9 of the guide vane diffusion section is changed to achieve performance adjustment, maximize product interchangeability, reduce the types of spare parts, and reduce management costs.

[0035] A replaceable mouth ring 4 is installed between the impeller 3 and the pump cover 5; the impeller 3 with the mouth ring 4 structure increases rotor support, reduces vibration risks, and ensures long-term stable operation of the unit.

[0036] The rotor of the bearing component 7 adopts a front-to-back adjustable structure; the clearance between the impeller 3 and the guide vane 2 can be adjusted without dismantling the pump, thereby ensuring the efficiency of the pump and improving the energy efficiency of the unit.

[0037] 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 it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A guide vane type small flow centrifugal pump, characterized in that: The guide vane type small flow centrifugal pump comprises: a pump body (1), a guide vane (2), an impeller (3), a mouth ring (4), a pump cover (5), a sealing component (6) and a bearing component (7); The mouth ring (4) is mounted on the impeller (3); The pump cover (5) is mounted on the bearing component (7); the rotor of the bearing component (7) adopts a front-to-back adjustable structure; The impeller (3) is mounted on the pump shaft and then encapsulated on the pump cover (5) through the guide vane (2) to form an impeller working chamber; The pump body (1) adopts a central outflow structure, does not need to be provided with an exhaust valve, adopts an annular flow channel, and is easy to cast; the pump body (1) is fastened to the pump cover (5) by bolts, and the guide vane (2) and the impeller (3) are encapsulated between the pump cover (5) and the pump body (1); a pressure water chamber (8) is provided on the guide vane (2), and the area of ​​the throat (9) at the inlet of the diffusion section of the pressure water chamber (8) changes with the change of performance requirements; the medium flows through the diffusion section into the pump body (1), and then flows out from the outlet of the pump body (1); A sealing component (6) is installed between the pump shaft and the pump cover (5) for sealing; A replaceable mouth ring (4) is arranged between the impeller (3) and the pump cover (5).

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