CN113187769A - Layered staggered guide vane with low noise characteristic - Google Patents
Layered staggered guide vane with low noise characteristic Download PDFInfo
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- CN113187769A CN113187769A CN202110533719.1A CN202110533719A CN113187769A CN 113187769 A CN113187769 A CN 113187769A CN 202110533719 A CN202110533719 A CN 202110533719A CN 113187769 A CN113187769 A CN 113187769A
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- Prior art keywords
- guide vane
- staggered
- layers
- low noise
- guide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Abstract
The invention relates to a stratified staggered guide vane with low noise characteristics. The guide vane blade is divided into a plurality of layers and staggered for a certain angle to form a plurality of layers of staggered guide vanes. The time difference and the phase difference exist when the impeller sweeps the staggered guide vanes, and the pressure pulsation energy generated after the impeller sweeps the guide vanes is restrained, so that the aim of weakening the vibration noise energy caused by the dynamic and static interference is fulfilled, and the comprehensive operation efficiency and the stability of the pump are improved.
Description
Technical Field
The invention relates to a layered staggered guide vane with low noise characteristic, which can be used in the fields of space guide vane design, radial guide vane design, pump impeller design, fan impeller and guide vane design, fan design and the like.
Background
The guide vane body is also called a guide shell, is used for various well pumps (deep well pumps and submersible pumps) and guide vane type mixed flow pumps, has complex internal flow and is an important link for pump energy conversion. The guide vane has the functions of collecting the liquid at the outlet of the impeller and sending the liquid to the inlet or outlet pipeline of the lower-stage impeller, converting the speed into pressure energy and eliminating the speed circulation. Under the non-design working condition, a large amount of backflow and vortex exist at the inlet of the guide vane blade, the internal flow is complex, particularly, a large amount of secondary flow exists on the suction surface of the guide vane in the space, large hydraulic loss is generated, the efficiency of the pump is influenced, and data shows that the hydraulic loss in the guide vane body accounts for 40% -50% of the hydraulic loss in the pump, and the guide vane is an important flow loss source of the pump. Meanwhile, due to the influence of dynamic and static interference effects of the impeller and the guide vane, secondary flow, vortex and other phenomena can aggravate pump body vibration induced by fluid, and the operation stability of the pump is reduced.
At present, research aiming at the guide vane body mainly focuses on the optimization aspects of parameters such as vane profile, geometric parameters, vane number and the like. For example, the influence of the outlet diameter of the guide vane body and the arrangement angle of the outlet of the vane on the matching characteristic of the impeller and the performance of the pump is researched by yellow glow and the like. The influence of the number of the guide vane blades of the diagonal flow pump on the performance and pressure pulsation is researched by Zhang Dynasty and the like. The Zhouying and the like research on the deep-well pump and analyze the influence of the guide vane bodies with two different blade forms of a cylindrical blade form and a twisted blade form on the performance of the pump. The existing research takes guide vane bodies with blades uniformly distributed along the circumference as research objects, and the guide vane performance is not researched from the structure of the blades so as to further improve the efficiency of the guide vane bodies and the matching performance of the guide vane bodies with an impeller and a pumping chamber. Therefore, the guide vane body is structurally reconstructed by breaking through the traditional design, and the method has important engineering significance for improving the hydraulic performance, reducing the dynamic and static interference effect of the impeller and the guide vane and optimizing the vibration noise level of the pump.
Disclosure of Invention
The invention provides a layered staggered guide vane with low noise characteristic, which weakens vibration noise energy caused by dynamic and static interference and achieves the purpose of designing a low noise pump.
The guide vane blade is divided into a plurality of layers and staggered for a certain angle to form a plurality of layers of staggered guide vanes. The time difference and the phase difference exist when the impeller sweeps the staggered guide vanes, and the pressure pulsation energy generated after the impeller sweeps the guide vanes is restrained, so that the aim of weakening the vibration noise energy caused by the dynamic and static interference is fulfilled, and the comprehensive operation efficiency and the stability of the pump are improved.
The technical scheme adopted by the invention is as follows: a guide vane with low noise and staggered layers, which consists of n1Layer blade, n1The guide vane body consists of 1 connecting partition plate (4) and a cover plate (2), and is arranged between the impeller (3) and the volute (5).
In the present invention, n is1-1 connecting partitions dividing the guide vane blade into n1The guide vanes are rotated by a certain angle, namely, the staggered angle theta, along the rotation direction of the impeller layer by taking the guide vane at the first layer as a reference, so that the multi-layer staggered guide vane is formed. The stagger angle between adjacent layers depends on the number of layers n1And number n of guide vanes2The size of the angle theta is 360/n1n2。
Number of layers n1Width b of outlet of impeller2And specific speed nsIt is determined that n may be 2. ltoreq. n1Less than or equal to 4. Total number n of guide vanes2Is 3 to 20. The thickness b of the connecting partition plate is related to the average thickness delta of the blade, and the value range of the thickness b is 0.5 delta-1.0 delta.
When the specific speed of the centrifugal pump is more than 10 and less than nsIf the number of the guide vane layers is less than 80, the number of the guide vane layers is 2.
When the specific speed of the centrifugal pump is not less than 80 nsWhen the number of the guide vane layers is less than 150, the number of the guide vane layers is more than 2 and less than n1≤3。
When the specific speed of the centrifugal pump is more than 150 < nsWhen the number of the guide vane layers is less than 300, n is more than or equal to 21≤4。
The specific speed of the mixed flow pump is 300 < nsWhen the number of the guide vane layers is less than 500, n is more than or equal to 31≤4。
The inlet and outlet installation angles, wrap angles and other structural parameters of the blades are the same.
The invention provides a layered staggered guide vane with low noise characteristic, which has the following technical advantages:
according to the invention, from the aspect of improving the fluid flow rule, the matching structure of the guide vane and the impeller is changed, and the complex flow structure in the guide vane is reconstructed, so that the impeller generates phase difference and time difference when sweeping the guide vane, the total pressure pulsation energy generated by dynamic and static interference is reduced, the vibration noise energy caused by the dynamic and static interference is inhibited, and the aim of low-noise design is achieved.
Drawings
FIG. 1 is a schematic view of a double layer staggered guide vane of the present invention.
FIG. 2 is a schematic axial cross-sectional view of a double layer staggered vane of the present invention.
FIG. 3 is a schematic view of the double layer staggered vane outlet flowpath deployment of the present invention.
FIG. 4 is a schematic diagram of a matching three-dimensional model of a double-layer staggered guide vane impeller of the present invention.
1 staggered guide vane blade, 2 cover plates, 3 impellers, 4 connecting partition plates, 5 volutes, 6 first-layer guide vane blades and 7 second-layer guide vane blades.
Detailed Description
The invention provides a layered staggered guide vane with low noise characteristic. The guide vane is a novel matching mode formed by a plurality of layers of staggered guide vane blades 1 and an impeller 3, so that vibration noise energy generated by dynamic and static interference of the impeller and the guide vane during pump operation is weakened to a certain extent. The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.
As shown in figure 1, the structure of the invention comprises a guide vane body consisting of 2 layers of staggered guide vane blades 1, 1 connecting partition plate 4 and a cover plate 2, wherein the guide vane body is arranged between an impeller 3 and a volute 5. The specific speed of the model pump is 69, belonging to low specific speed, and the number of layers n is taken1Is 2. As shown in FIG. 1, the number n of the original blades in this embodiment2The number of the guide vane blades is 10, so the stagger angle theta between the first layer of guide vane blades 6 and the second layer of guide vane blades 7 is 360/n1n218 ° is set. Fig. 2 is a schematic diagram of matching a double-layer guide vane with an impeller in an embodiment, wherein a connecting partition plate is arranged on the center line of a guide vane flow passage. As shown in fig. 3, the thickness b of the partition board is 1.0 δ to be 3.5mm, the guide vane flow channel is equally divided, the guide vane blade is divided into a first layer of guide vane blade 6 and a second layer of guide vane blade 7, and the staggered angle of the two layers of guide vanes is 18 °. In this specific implementation, the inlet and outlet placement angles, wrap angles, and other structural parameters of all the guide vane blades are the same, and the schematic diagram of the three-dimensional model thereof is shown in fig. 4.
The invention proceeds from improving the fluid flow rule, redesigns the guide vane structure, and changes the matching structure of the guide vane body and the impeller. The complex flow structure of the guide vanes is reconstructed, so that when the impeller sweeps a plurality of layers of staggered guide vanes, a certain phase difference is generated, and the total pressure pulsation energy generated by the dynamic and static interference of the impeller and the guide vanes is reduced, thereby inhibiting the vibration noise energy caused by the dynamic and static interference and achieving the purpose of low noise design.
Claims (9)
1. The guide vane with low noise characteristic includes guide vane body installed between the impeller and the volute casing and features that the guide vane body consists of n1Layer blade, n11 connecting partition and cover plate, through n1-1 connecting partitions dividing the guide vane blade into n1The guide vanes are rotated by a certain angle, namely, the staggered angle theta, along the rotation direction of the impeller layer by taking the guide vane at the first layer as a reference, so that the multi-layer staggered guide vane is formed.
2. The splitter vane as claimed in claim 1, wherein the splitting angle θ between adjacent layers is determined by the number of splits n1And number n of guide vanes2The size of the angle theta is 360/n1n2。
3. The stratified staggered vane with low noise characteristics of claim 2, wherein: number of layers n1Width b of outlet of impeller2And specific speed nsDetermining that n is 2. ltoreq. n1Less than or equal to 4; total number n of guide vanes2Is 3 to 20.
4. A stratified staggered guide vane with low noise characteristics as claimed in claim 3, wherein: when the specific speed of the centrifugal pump is more than 10 and less than nsIf the number of the guide vane layers is less than 80, the number of the guide vane layers is 2.
5. A stratified staggered guide vane with low noise characteristics as claimed in claim 3, wherein: when the specific speed of the centrifugal pump is not less than 80 nsWhen the number of the guide vane layers is less than 150, the number of the guide vane layers is more than 2 and less than n1≤3。
6. A stratified staggered guide vane with low noise characteristics as claimed in claim 3, wherein:
when the specific speed of the centrifugal pump is more than 150 < nsWhen the number of the guide vane layers is less than 300, n is more than or equal to 21≤4。
7. A stratified staggered guide vane with low noise characteristics as claimed in claim 3, wherein:
when the specific speed of the mixed flow pump is more than 300 < nsWhen the number of the guide vane layers is less than 500, n is more than or equal to 31≤4。
8. The stratified staggered guide vane with low noise characteristics as claimed in claim 1, wherein: all guide vane blades have the same structural parameters including the setting angle and the wrap angle.
9. The stratified staggered guide vane with low noise characteristics as claimed in claim 1, wherein: the layered staggered guide vane structure is suitable for the design of cylindrical radial guide vanes and twisted space guide vanes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110533719.1A CN113187769A (en) | 2021-05-17 | 2021-05-17 | Layered staggered guide vane with low noise characteristic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110533719.1A CN113187769A (en) | 2021-05-17 | 2021-05-17 | Layered staggered guide vane with low noise characteristic |
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| CN113187769A true CN113187769A (en) | 2021-07-30 |
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| CN202110533719.1A Pending CN113187769A (en) | 2021-05-17 | 2021-05-17 | Layered staggered guide vane with low noise characteristic |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111187A (en) * | 2022-07-29 | 2022-09-27 | 江苏大学 | Novel high-speed pump impeller |
| CN115234509A (en) * | 2022-07-29 | 2022-10-25 | 江苏大学 | High-efficient low noise high speed pump impeller |
-
2021
- 2021-05-17 CN CN202110533719.1A patent/CN113187769A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115111187A (en) * | 2022-07-29 | 2022-09-27 | 江苏大学 | Novel high-speed pump impeller |
| CN115234509A (en) * | 2022-07-29 | 2022-10-25 | 江苏大学 | High-efficient low noise high speed pump impeller |
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