Guide vane of centrifugal pump

Abstract

The guide vane of the centrifugal pump comprises a guide vane disc, the guide vane disc is vertically arranged, the right side of the guide vane disc is provided with a plurality of reverse vanes which are distributed around the center point of the guide vane disc, the reverse vanes are in an arc shape, the ends, close to the outer side of the guide vane disc, of the reverse vanes are in a twisted shape, and a liquid flow channel is formed between any two adjacent reverse vanes. A plurality of positive blades distributed around the center point of the guide blade disc are arranged on the left side of the guide blade disc, each positive blade is in an arc shape, one end of each positive blade extends to the right side of the guide blade disc, the end, extending to the right side of the guide blade disc, of each positive blade is in a twisted shape, and a liquid expansion flow channel is formed between any adjacent positive blades. The device has the advantages that liquid impact and vortex hydraulic loss in the liquid expansion flow channel can be reduced, the circulation of liquid circumferential rotation is eliminated, a cover-plate-free open structure is adopted, the flow channel is convenient to process after blank casting, the surface precision of the flow channel is high, and the efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of guide vanes of a multi-stage centrifugal pump, in particular to a guide vane of a centrifugal pump. Background Art

[0002] The guide vane of a multistage centrifugal pump is a fixed flow guide device located between the pump casing and the impeller. Its function is to collect the liquid flowing out of the impeller and transport it to the discharge port or the suction port of the next stage impeller. It is one of the core flow components of the centrifugal pump.

[0003] The performance of the guide vane affects the efficiency of the pump. Among the hydraulic losses of the liquid in the guide vane, the loss in the turning area accounts for a large proportion. The traditional guide vane will form a liquid rotating ring in the turning area. At the same time, there will be liquid impact and vortex hydraulic losses, which will reduce the efficiency of the pump. Secondly, the traditional guide vane adopts a cover plate structure, which is not convenient for processing the flow channel after the blank is cast, and the surface accuracy of the flow channel is low.

[0004] Therefore, a guide vane of a centrifugal pump is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a guide vane of a centrifugal pump to solve the above problems.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A guide vane of a centrifugal pump comprises a guide vane disc, which is arranged vertically. A plurality of reverse blades are arranged on the right side of the guide vane disc and are distributed around the center point of the guide vane disc. The reverse blades are in an arc shape and one end close to the outer side of the guide vane disc is twisted, and a liquid flow channel is formed between any adjacent reverse blades. A plurality of positive blades are arranged on the left side of the guide vane disc and are distributed around the center point of the guide vane disc. The positive blades are in an arc shape and one end extends to the right side of the guide vane disc. The end of the positive blade extending to the right side of the guide vane disc is twisted, and a liquid expansion flow channel is formed between any adjacent positive blades.

[0008] Preferably, the liquid expansion channel comprises a transition channel located outside the guide vane disk and a diffusion channel located inside the guide vane disk, and the transition channel corresponds to the liquid flow channel.

[0009] Preferably, the liquid flow channel is located at one end of the outer side and the inner side of the guide vane disk as an inlet and an outlet respectively, the transition flow channel corresponds to the inlet, and a through hole is opened at the center point of the side surface of the guide vane disk.

[0010] Preferably, one end of the positive blade extending to the right of the guide vane disc and the right end of the negative blade are in the same vertical plane.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows: the turning area of ​​the guide vane adopts an arc structure and a positive blade with a twisted end on one side, which can reduce the liquid impact and vortex hydraulic loss in the expansion channel, eliminate the circulation of the liquid circumferential rotation, thereby improving the efficiency of the pump, and adopts an open structure without a cover plate, which is convenient for processing the channel after the blank is cast, and improves the surface accuracy of the channel, thereby reducing the loss of hydraulic power in the guide vane channel and improving the efficiency of the pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0013] Figure 1 This is a perspective view of the three-dimensional structure of the utility model;

[0014] Figure 2 This is the second angle of the three-dimensional structural schematic diagram of the utility model;

[0015] Figure 3 This is the perspective three of the three-dimensional structure diagram of the utility model;

[0016] Figure 4 It is a front view of the utility model.

[0017] In the attached drawings: 1, positive blade; 4, negative blade; 6, guide vane; 7, through hole. DETAILED DESCRIPTION

[0018] The following describes the embodiments of the utility model in detail, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. In the description of the utility model, it should be understood that the orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present invention, "multiple" means two or more, and "several" means one or more, unless otherwise clearly and specifically defined.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0021] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0022] In this embodiment, Figure 1-4 A guide vane of a centrifugal pump is provided. The utility model includes a guide vane plate 6, which is vertically arranged. A plurality of reverse blades 4 are arranged on the right side of the guide vane plate 6 and are distributed around its center point. The reverse blades 4 are arc-shaped and one end close to the outer side of the guide vane plate 6 is twisted, and a liquid flow channel is formed between any adjacent reverse blades 4. A plurality of positive blades 1 are arranged on the left side of the guide vane plate 6 and are distributed around its center point. The positive blades 1 are arc-shaped and one end extends to the right side of the guide vane plate 6. The end of the positive blade 1 extending to the right side of the guide vane plate 6 is twisted, and an expansion liquid flow channel is formed between any adjacent positive blades 1.

[0023] In this embodiment, adjacent positive blades 1 form a liquid expansion channel, adjacent negative blades 4 form a liquid flow channel, and the turning area of ​​the guide vane adopts an arc structure and the positive blade 1 is twisted at one end, which can reduce the liquid impact and vortex hydraulic loss in the liquid expansion channel and eliminate the circulation of the liquid circumferential rotation, thereby improving the efficiency of the pump. In addition, an open structure without a cover plate is adopted, which is convenient for processing the flow channel after the blank is cast, and the surface accuracy of the flow channel is improved, thereby reducing the loss of hydraulic power in the guide vane flow channel and improving the efficiency of the pump.

[0024] Preferably, as another embodiment of the utility model, the liquid expansion channel includes a transition channel located on the outside of the guide vane disk 6 and a diffusion channel located on the inside of the guide vane disk 6, the transition channel corresponds to the liquid flow channel, and the transition channel and the diffusion channel constitute a liquid expansion channel for guiding the liquid into the liquid flow channel.

[0025] Preferably, as another embodiment of the utility model, the liquid flow channel is located at the outer and inner ends of the guide vane disk 6 as the inlet and outlet respectively, the transition channel corresponds to the inlet, and a through hole 7 is opened at the center point of the side of the guide vane disk 6.

[0026] In this embodiment, the liquid discharged from the transition flow channel in the expansion flow channel will enter the inlet of the liquid flow channel, and then be discharged into the through hole 7 from the outlet, and then discharged into the next stage impeller.

[0027] Preferably, as another embodiment of the present utility model, one end of the positive blade 1 extending to the right of the guide vane disk 6 and the right end of the reverse blade 4 are in the same vertical plane.

[0028] In this embodiment, the relative position between the counter blade 4 and the guide vane disk 6 is stabilized, the working accuracy is improved, and friction with other workpieces during installation is avoided.

[0029] Working principle: liquid can pass through the transition channel and the diffusion channel, that is, the expansion channel formed by adjacent positive blades 1, and then be discharged into the liquid channel, and the transition channel corresponds to the inlet of the liquid channel, and the ends of the reverse blade 4 and the positive blade 1 that are close to each other are twisted. The twisted blades are more efficient and can form a spatial channel, eliminating liquid circulation, reducing the impact and vortex hydraulic loss of the liquid in the transition channel, and improving the efficiency of the pump. The open structure without a cover plate is adopted, which is convenient for processing the channel after the blank is cast, and the surface accuracy of the channel is improved, thereby reducing the loss of hydraulic power in the guide vane channel and improving the efficiency of the pump. The liquid in the inlet can be discharged from the outlet into the through hole 7, and then discharged into the next stage impeller.

[0030] In the description of this specification, the description with reference to the terms "embodiment", "one embodiment", "certain embodiments", "illustrative embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0031] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanations here, technicians in this field can think of other specific implementations of the present invention without creative work, and these equivalent variations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A guide vane of a centrifugal pump, characterized in that: The invention comprises a guide vane disc (6), wherein the guide vane disc (6) is arranged vertically, and a plurality of reverse blades (4) are arranged on the right side of the guide vane disc (6) and are distributed around the center point thereof, the reverse blades (4) are in an arc shape and one end close to the outer side of the guide vane disc (6) is twisted, and a liquid flow channel is formed between any adjacent reverse blades (4), and a plurality of positive blades (1) are arranged on the left side of the guide vane disc (6) and are distributed around the center point thereof, the positive blades (1) are in an arc shape and one end extends to the right side of the guide vane disc (6), and one end of the positive blades (1) extending to the right side of the guide vane disc (6) is twisted, and a liquid expansion flow channel is formed between any adjacent positive blades (1).

2. The guide vane of a centrifugal pump according to claim 1, characterized in that: The liquid expansion channel comprises a transition channel located outside the guide vane disk (6) and a diffusion channel located inside the guide vane disk (6), and the transition channel corresponds to the liquid flow channel.

3. The guide vane of a centrifugal pump according to claim 2, characterized in that: The liquid flow channel is located at one end of the outer side and the inner side of the guide vane disk (6) as an inlet and an outlet respectively, the transition flow channel corresponds to the inlet, and a through hole (7) is provided at the center point of the side surface of the guide vane disk (6).

4. The guide vane of a centrifugal pump according to claim 1, characterized in that: One end of the positive blade (1) extending to the right of the guide vane disk (6) and the right end of the negative blade (4) are located in the same vertical plane.

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