CN219711865U

CN219711865U - Blade type blade structure for reducing NVH noise of hydrogen circulating pump

Info

Publication number: CN219711865U
Application number: CN202320228403.6U
Authority: CN
Inventors: 朱林峰; 郑建设; 郑伟茂; 郭凯
Original assignee: Beehive Weiling Power Technology Jiangsu Co ltd
Current assignee: Beehive Weiling Power Technology Jiangsu Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-09-19
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to a blade type blade structure of a hydrogen circulating pump for reducing NVH noise, wherein an inner ring and an outer ring of blades are concentrically arranged, a plurality of blades are horizontally and uniformly connected between the inner ring and the outer ring of the blades at intervals around the center of the inner ring of the blades in a spiral way in the tangential direction of the inner ring of the blades, the blades are of a horizontally-oriented V-shaped structure, the V-shaped inner sides of the blades are upper pressure surfaces and lower pressure surfaces, the upper pressure surfaces and the lower pressure surfaces are in arc transition at V-shaped joints, the V-shaped outer sides of the blades are upper suction surfaces and lower suction surfaces, the upper suction surfaces and the lower suction surfaces are in arc transition at the V-shaped joints, the upper ends and the lower ends of the upper suction surfaces and the lower suction surfaces are arc chamfers, the included angle between the upper suction surfaces and the upper pressure surfaces is gradually increased from top to bottom, and the included angle between the lower suction surfaces and the lower pressure surfaces is gradually increased from bottom to top. The device has a simple structure, can effectively consider flow and efficiency, and the whole volume and weight, and reduces BPF noise.

Description

Blade type blade structure for reducing NVH noise of hydrogen circulating pump

Technical Field

The utility model relates to a hydrogen circulating pump, in particular to a blade type blade structure of the hydrogen circulating pump for reducing NVH noise.

Background

The hydrogen circulating pump is used as a key device in a fuel conveying system and has relatively high rotating speed, the structure comprises a motor and a rotor system, and main noise sources of the hydrogen circulating pump are synchronous noise, motor noise, impeller aerodynamic noise and the like; the main part of the pneumatic noise is blade passing frequency noise, and the hydrogen circulating pump also has BPF noise as the turbocharger used by the traditional internal combustion engine; with the development of the fuel cell automobile, the output power of the fuel cell reactor is further improved, the flow and the rotating speed of the hydrogen pump are increased by the higher index, the average stress of the blades is increased, the impeller BPF noise is increased, and particularly in a low rotating speed area of the hydrogen circulating pump, the impeller BPF noise is easily distinguished from the operation background noise thereof, and the frequency band is sensitive to human ears.

The best solution for BPF noise in the prior art is to increase the number of blades, but increasing the number of blades reduces the maximum flow and the highest efficiency of the hydrogen circulating pump, which is contrary to the requirement of higher and higher performance indexes; in addition, a Helmholtz silencer is added to the outlet of the hydrogen circulating pump, noise is filtered in a fixed frequency section, the outlet boundary of the hydrogen circulating pump can be changed, the cost is increased, and the overall quality is increased.

Disclosure of Invention

The blade type blade structure for reducing NVH noise of the hydrogen circulating pump is simple in structure, and can effectively give consideration to flow, efficiency, overall volume and weight.

The technical scheme adopted by the utility model is as follows: a hydrogen circulating pump is used for reducing edge type blade structure of NVH noise, its characterized in that: including blade inner circle, blade outer lane and a plurality of blade, the concentric setting of blade is in, outer lane, a plurality of blades are the level towards blade inner circle tangential direction around blade inner circle central spiral interval equipartition connect in between the blade, the outer lane, the blade is the V type structure of level orientation, the inboard upper and lower pressure face that is of blade V type, upper and lower pressure face is at V type junction circular arc transition, the blade V type outside is upper and lower suction face, upper and lower suction face is at V type junction circular arc transition, upper and lower suction face's upper and lower end is circular arc chamfer, the contained angle of upper suction face and upper pressure face is from top to bottom increase gradually, the contained angle of lower suction face and lower pressure face is from bottom to top gradually.

The outer side of the circular arc chamfer is tangent with the horizontal line, and the outer side endpoint of the circular arc chamfer is arranged on the outermost edge of the corresponding pressure surface.

The blade V-shaped joint is vertically symmetrical at the central V-shaped joint.

The included angle between the upper pressure surface and the vertical line is larger than the included angle between the lower pressure surface and the vertical line.

The blade type blade structure can improve gas flow, improve the flow rate and efficiency of a hydrogen circulating pump and reduce the average stress of a single blade under the condition of proper blade number so as to reduce BPF noise.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a cross-sectional expanded view of the corresponding blade of FIG. 1.

In the figure: the blade inner ring 1, the blade outer ring 2, the blade 3, the upper pressure surface 4, the lower pressure surface 5, the upper suction surface 6, the lower suction surface 7 and the circular arc chamfer 8.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

Fig. 1 and 2 show: the blade type blade structure for reducing NVH noise of the hydrogen circulating pump comprises a blade inner ring 1, a blade outer ring 2 and a plurality of blades 3, wherein the blades are concentrically arranged in the blade inner ring and the blade outer ring 1 and 2, the blades 3 are horizontally oriented to the tangential direction of the blade inner ring and are uniformly connected between the blade inner ring and the blade outer ring at intervals around the center of the blade inner ring in a spiral way, the blades are horizontally oriented V-shaped structures, the upper pressure surface 4 and the lower pressure surface 5 are respectively arranged on the upper inner side and the lower inner side of the V-shaped, the upper pressure surface and the lower pressure surface are in arc transition at a V-shaped joint, the upper suction surface 6 and the lower suction surface 7 are respectively arranged on the upper side and the lower outer side of the V-shaped, the included angle between the upper suction surface and the upper pressure surface is gradually increased from top to bottom, and the included angle between the lower suction surface and the lower pressure surface is gradually increased from bottom to top; the upper and lower ends of the upper and lower suction surfaces are arc chamfers 8, the outer sides of the arc chamfers are tangent to the horizontal line, and the outer end points of the arc chamfers are arranged on the outermost edges of the corresponding pressure surfaces.

The air flow flows from the upper suction surface of the blade to the lower part through the lower pressure surface, is pressed out through the lower pressure surface, is sucked out simultaneously, effectively ensures the stable, efficient and high-flow delivery of the air flow, and is thick in the middle and thin up and down through the arc transition of the V-shaped joint, the blade is provided with an edge type blade, and the edge type blade can stably fluctuate the air flow entering the impeller when rotating at a high speed, so that the stall generated by the separation of the air at the front edge is avoided, and the pneumatic flow and the efficiency can be effectively improved.

In this embodiment the blade V-shape is symmetrical up and down with a central V-shape junction.

The blades can be obliquely arranged, and the included angle between the upper pressure surface and the vertical line is larger than the included angle between the lower pressure surface and the vertical line, so that the downward pressure of gas is facilitated.

Claims

1. A hydrogen circulating pump is used for reducing edge type blade structure of NVH noise, its characterized in that: including blade inner circle, blade outer lane and a plurality of blade, the concentric setting of blade is in, outer lane, a plurality of blades are the level towards blade inner circle tangential direction around blade inner circle central spiral interval equipartition connect in between the blade, the outer lane, the blade is the V type structure of level orientation, the inboard upper and lower pressure face that is of blade V type, upper and lower pressure face is at V type junction circular arc transition, the blade V type outside is upper and lower suction face, upper and lower suction face is at V type junction circular arc transition, upper and lower suction face's upper and lower end is circular arc chamfer, the contained angle of upper suction face and upper pressure face is from top to bottom increase gradually, the contained angle of lower suction face and lower pressure face is from bottom to top gradually.

2. The blade structure of the hydrogen circulation pump for reducing NVH noise according to claim 1, characterized in that: the outer side of the circular arc chamfer is tangent with the horizontal line, and the outer side endpoint of the circular arc chamfer is arranged on the outermost edge of the corresponding pressure surface.

3. The blade structure of the hydrogen circulation pump for reducing NVH noise according to claim 1, characterized in that: the blade V-shaped joint is vertically symmetrical at the central V-shaped joint.

4. The blade structure of the hydrogen circulation pump for reducing NVH noise according to claim 1, characterized in that: the included angle between the upper pressure surface and the vertical line is larger than the included angle between the lower pressure surface and the vertical line.