A high-temperature submersible multistage pump guide vane

Abstract

The utility model relates to a kind of high-temperature under liquid multistage pump flow guide, including two symmetrical volute double channels, two separate tongues, two separate tongues are fixed on the position of the outlet extension 3-10mm of two symmetrical volute double channels;Multiple flow guides are connected together to form flow guide group;Flow guide lower part is fixedly connected with suction body or upper level flow guide, and flow guide upper part is fixedly connected with lower level flow guide.The utility model structure is relatively simple, axial dimension is compact, cancel the precision blade design of existing flow guide, cancel the long and narrow flow passage design of existing structure, reduce casting difficulty, improve the yield of flow guide.Fluid and flow passage between friction is reduced, friction loss is reduced, and hydraulic efficiency is improved.Fluid and overcurrent component under high temperature and corrosion are reduced, effectively improve the corrosion and abrasion resistance of flow guide and scour performance, improve the service life of flow guide.

Description

Technical Field

[0001] This utility model relates to a fluid guide, specifically a high-temperature submersible multistage pump fluid guide with a simpler structure, improved yield, improved hydraulic efficiency, and improved service life. Background Technology

[0002] High-temperature submersible multistage pumps are submersible pumps immersed in high-temperature media, and are widely used in chemical industry, solar thermal power generation, molten salt energy storage systems, and other high-temperature operating conditions.

[0003] Because high-temperature submersible pumps operate at high temperatures and the media they handle are often corrosive, the reliability and stability of the unit are of paramount importance. This places high demands on the design and manufacturing of the fluid guide, a key component in the flow path.

[0004] Most existing high-temperature submersible multistage pumps adopt traditional long-shaft submersible pumps, and their fluid guide structure is as follows: Figure 1 As shown, blade 2 and guide vane body 1 are cast as one piece.

[0005] The existing structure has the following drawbacks:

[0006] 1. The space guide structure is relatively complex, consisting of several precisely designed blades. The blades form narrow flow channels, making its design complex and casting difficult.

[0007] 2. The large number of space guide vanes increases the contact area between the vanes and the fluid, leading to increased friction loss and lower pump efficiency.

[0008] 3. The space guide has several precisely designed blades, which result in poor resistance to corrosion and abrasion. Utility Model Content

[0009] To address the aforementioned problems, the main objective of this utility model is to provide a high-temperature submersible multistage pump guide fluid with a simpler structure, improved yield of the guide fluid, improved hydraulic efficiency, and extended service life.

[0010] This utility model solves the above-mentioned technical problems through the following solution: a high-temperature submersible multistage pump guide fluid, wherein the high-temperature submersible multistage pump guide fluid includes: two symmetrical volute-type double channels and two partitions.

[0011] Two tongues are fixed at the outlets of two symmetrical volute-type dual channels, extending 3-10mm respectively; multiple guide fluids are connected in series to form a guide fluid group; the lower part of the guide fluid is fixedly connected to the inhalation body or the previous stage guide fluid, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid.

[0012] In a specific embodiment of this utility model, the lower part of the guide fluid is fixedly connected to the suction body or the previous stage guide fluid by bolts, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid by bolts.

[0013] In a specific embodiment of this utility model, two symmetrical volute-type double channels and two tongues are cast into one piece by casting.

[0014] In a specific embodiment of this utility model, the fluid enters the impeller through the suction body or the previous stage guide fluid, and after being pressurized by the impeller, it enters the next stage guide fluid. The tongue guides the fluid to smoothly transition from the impeller outlet to the volute-type dual channel.

[0015] In a specific embodiment of this utility model, the high-temperature submersible multistage pump guide fluid adopts two symmetrical volute-type dual channels, eliminating the narrow flow channel design and blade design of the existing structure.

[0016] The positive and progressive effects of this utility model are as follows: The high-temperature submersible multistage pump guide fluid proposed in this utility model has a simpler structure and a more compact axial dimension. It eliminates the precision blade design and narrow flow channel design of existing guide fluids, reducing casting difficulties and improving the yield of the guide fluid. It reduces friction between the fluid and the flow channel, lowers friction loss, and improves hydraulic efficiency. It reduces the contact between the fluid and the flow components under high temperature and corrosive conditions, effectively improving the corrosion resistance and abrasion erosion performance of the guide fluid, and extending its service life. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a commonly used fluid conductor.

[0018] Figure 2 This is a schematic diagram of the structure of the fluid guide proposed in this utility model.

[0019] Figure 3 This is a schematic diagram of the installation position of this utility model.

[0020] Figure 4 This is a schematic diagram illustrating the guiding effect of space guide vanes, which are commonly used in current applications.

[0021] Figure 5 This is a schematic diagram illustrating the effect of guiding the fluid without using spatial guide vanes in this utility model.

[0022] Figure 6 This is a schematic diagram of the axial effect of a commonly used space guide vane.

[0023] Figure 7 This is a schematic diagram illustrating the axial length of this utility model.

[0024] The following are the names corresponding to the reference numerals in this utility model:

[0025] Figure 1-7 In the middle: guide vane body 100, blade 200, guide fluid 1, volute-type double channel 2, tongue 3, impeller 4, pump shaft 5, suction body 6. Detailed Implementation

[0026] The preferred embodiments of this utility model are given below with reference to the accompanying drawings to illustrate the technical solution of this utility model in detail.

[0027] The technical problem to be solved by this utility model is as follows:

[0028] 1. High-temperature submersible pumps and multi-stage pumps have complex spatial guide structures, making design complicated, casting difficult, and resulting in low product yield.

[0029] Solution: Adopt a dual-channel volute structure fluid guide design. This design is simple and reliable, eliminates the narrow flow channel design of the existing structure, greatly reduces casting difficulties, and improves the yield of the fluid guide.

[0030] 2. High-temperature submersible pumps and multistage pumps have large spatial friction losses and low pump efficiency.

[0031] Solution: A dual-channel volute structure fluid guide design is adopted, which uses a volute-type large-channel flow channel design. While ensuring the flow rate of the water cross section, the precision blade design of the existing fluid guide is eliminated, reducing the friction between the fluid and the flow channel, reducing friction loss, and improving hydraulic efficiency.

[0032] 3. High-temperature submersible pumps and multistage pumps have poor resistance to corrosion and abrasion.

[0033] Solution: Adopting a dual-channel volute structure fluid guide design eliminates the precision blade design of the existing fluid guide, reduces the contact between the fluid and the flow components under high temperature and corrosion, effectively improves the corrosion resistance and abrasion erosion performance of the fluid guide, and extends the service life of the fluid guide.

[0034] The following are specific implementation examples: Figure 2 This is a schematic diagram of the structure of the fluid guide proposed in this utility model. Figure 3 This is a schematic diagram of the installation position of this utility model, as shown below. Figure 2 and 3As shown: This utility model proposes a high-temperature submersible multistage pump guide fluid 1, which includes: two symmetrical volute-type double channels 2 and two partitions 3. The two partitions 3 are respectively fixed at a position 3-10mm extending from the outlet of the two symmetrical volute-type double channels 2. In specific implementation, the above parameters are selected with different values ​​or ranges according to specific requirements. This utility model can use multiple guide fluids connected in series to form a guide fluid group; the lower part of the guide fluid is fixedly connected to the suction body 6 or the previous stage guide fluid, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid. In specific implementation, the lower part of the guide fluid is fixedly connected to the suction body 6 or the previous stage guide fluid by bolts, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid by bolts.

[0035] In the specific implementation process, the two symmetrical volute-type double channels 2 and the two tongues 3 of this utility model are cast into one piece by casting.

[0036] The lower part of this utility model is connected to the inhalation body 6 or the upper-level fluid guide by bolts, and the upper part of the fluid guide is connected to the lower-level fluid guide by bolts. Depending on different parameters, several fluid guides can be connected in series.

[0037] In this invention, the fluid enters the impeller through the suction body or the previous stage guide fluid. After being pressurized by the impeller, it enters the next stage guide fluid. The tongue guides the fluid to smoothly transition from the impeller outlet to the volute-type double channel 2, reducing flow separation, improving the stability of fluid movement, increasing hydraulic efficiency, and reducing vibration and noise.

[0038] Figure 4 This is a schematic diagram illustrating the fluid guiding effect of commonly used space guide vanes. Figure 5 This is a schematic diagram illustrating the effect of guiding the fluid without using spatial guide vanes in this utility model. Figure 4 The image shows a space guide vane blade 200. There are usually more than 6 blades. The more blades 200 there are, the more complex the casting process becomes and the higher the casting cost. Figure 5 The image shows a symmetrical volute double-channel fluid guide for a high-temperature submersible multistage pump, with a generally low casting complexity.

[0039] Figure 6 This is a schematic diagram showing the axial effect of a commonly used space guide vane. Figure 7 This is a schematic diagram illustrating the axial length effect of this utility model. (Comparison) Figure 6 and Figure 7 , Figure 6 It can be seen that the axial dimension of the space guide vane body is relatively large. Figure 6 The blade size in the design determines that the axial length of the space guide vane body is considerable and cannot be too small; Figure 7 The symmetrical dual-channel structure of the high-temperature submersible multistage pump reduces the axial length, resulting in a smaller axial dimension of the guide fluid, less space occupation, lighter weight, and lower casting cost.

[0040] The overall structure of this utility model's guide vane is relatively simple, with a compact axial dimension. It eliminates the precision blade design and narrow flow channel design of existing guide vanes, reducing casting difficulties and improving the yield of the guide vane. It reduces friction between the fluid and the flow channel, lowering frictional losses and improving hydraulic efficiency. It also reduces the contact between the fluid and the flow components under high temperatures and corrosion, effectively improving the guide vane's corrosion resistance and abrasion erosion resistance, thus extending its service life.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. A high temperature submersible multistage pump guide vane characterized by: The high-temperature submersible multistage pump guide includes: two symmetrical volute-type dual channels and two baffles. Two tongues are fixed at the outlets of two symmetrical volute-type dual channels, extending 3-10mm respectively; multiple guide fluids are connected in series to form a guide fluid group; the lower part of the guide fluid is fixedly connected to the inhalation body or the previous stage guide fluid, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid.

2. The high temperature submersible multi-stage pump guide body of claim 1, wherein: The lower part of the guide fluid is fixedly connected to the suction body or the previous stage guide fluid by bolts, and the upper part of the guide fluid is fixedly connected to the next stage guide fluid by bolts.

3. The high temperature submersible multi-stage pump guide as claimed in claim 1, wherein: Two symmetrical volute-type double channels and two tongues are cast together as one piece.

4. The high temperature submersible multi-stage pump guide as recited in claim 1, wherein: The fluid enters the impeller through the suction body or the previous stage guide fluid. After being pressurized by the impeller, it enters the next stage guide fluid. The tongue guides the fluid to smoothly transition from the impeller outlet to the volute-type dual channel.

5. The high temperature submersible multi-stage pump guide body of claim 1, wherein: The high-temperature submersible multistage pump uses two symmetrical volute-type dual channels for the guide fluid, eliminating the narrow flow channel design and blade design of the existing structure.

Images