CN213981331U

CN213981331U - Three-dimensional flow impeller

Info

Publication number: CN213981331U
Application number: CN202022067766.5U
Authority: CN
Inventors: 钟仁志; 袁军; 彭进; 项董欣
Original assignee: Xinlei Compressor Co Ltd
Current assignee: Xinlei Compressor Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-08-17
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a three-dimensional flow impeller, including chassis and the main blade and the splitter blade that take shape in the chassis, the chassis is the disc structure, be equipped with circular frustum in the middle of the chassis, the outer peripheral face of circular frustum and the surface rounding off all around of chassis, main blade and splitter blade all are equipped with a plurality ofly in the circumferencial direction on chassis, be equipped with a splitter blade between every two adjacent main blades, main blade extends to the edge to the surface all around of chassis from the upper end of the outer peripheral face of circular frustum, the size of splitter blade is less than the size of main blade, and the end of splitter blade extends to the edge of the surface all around of chassis; the inlet oblique cutting angle of the main blade at the inlet of the impeller is 65-80 degrees, the inlet oblique cutting angle of the splitter blade at the inlet of the impeller is 60-90 degrees, and the outlet angles of the main blade and the splitter blade at the outlet of the impeller are 40-65 degrees. The pneumatic air compressor has the advantages of small flow loss, high pneumatic efficiency, wide stable operation working condition range, easiness in processing and the like.

Description

Three-dimensional flow impeller

Technical Field

The utility model belongs to the technical field of centrifugal blower, especially, relate to a three-dimensional flow impeller.

Background

At present, the centrifugal blower is widely applied to the fields of cement manufacture, sewage treatment and the like. The impeller is the only element in the centrifugal blower which does work on the airflow, and the gas rotates at high speed along with the impeller under the action of the impeller blades to generate centrifugal force and convert kinetic energy into potential energy (pressure). The traditional pneumatic design method of the compressor impeller simplifies the gas flowing process in the impeller, has large error in high pressure ratio and small flow magnitude, generally has low efficiency, increases the operation cost of the compressor, and greatly wastes energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-dimensional flow impeller can satisfy the requirement of different unit design flow, pressure rise and rotational speed isoparametric, and it is little to have the loss of flow, and pneumatic efficiency is high, and steady operation operating mode scope is wide, advantages such as easy machine tooling.

In order to achieve the above object, the utility model provides a three-dimensional flow impeller, it includes the chassis and the main blade and the splitter blade that take shape in the chassis, the chassis is the disc structure, be equipped with circular frustum in the middle of the chassis, the outer peripheral face of circular frustum with the smooth transition of the surface all around of chassis, main blade and splitter blade all are equipped with a plurality ofly in the circumferencial direction of chassis, be equipped with one between every two adjacent main blade the splitter blade, main blade extends to the edge of the surface all around of chassis from the upper end of the outer peripheral face of circular frustum, splitter blade's size is less than the size of main blade, and splitter blade's end extends to the edge of the surface all around of chassis; the inlet oblique cutting angle of the main blade at the inlet of the impeller is 65-80 degrees, the inlet oblique cutting angle of the splitter blade at the inlet of the impeller is 60-90 degrees, and the outlet angles of the main blade and the splitter blade at the outlet of the impeller are both 40-65 degrees.

As the preferred scheme of the utility model, the main leaf with splitter blade all is equipped with 6 ~ 9.

Implement the utility model provides a pair of three dimensional flow impeller compares with prior art, and its beneficial effect lies in:

the utility model discloses a ternary flow theory based on load optimal distribution designs and optimizes, for common impeller blade leading edge (being the inlet side) vertical axis and zero inclination isotructure on the existing market, through setting up impeller import chamfer angle, can be under the condition of the same impeller import apex mach number, the actual flow area of impeller import has been increased and the blocking effect of impeller import department has been reduced, consequently, be favorable to improving impeller aerodynamic efficiency 1% ~ 2% and widening flow range 3% ~ 6%, can satisfy different unit design flow, the requirement of pressure rise and rotational speed isoparametric, it is little to have loss of flow, aerodynamic efficiency is high, the steady operation operating mode scope is wide, advantages such as easy machine tooling.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.

Fig. 1 is a schematic structural diagram of a three-dimensional flow impeller provided by the present invention;

FIG. 2 is a schematic view of the main blades being deployed in the direction of airflow;

FIG. 3 is a schematic view of the splitter blade being deployed in the direction of airflow;

FIG. 4 is a schematic illustration of the exit angle of the primary blades and the exit angle of the splitter blades;

FIG. 5 is a flow-to-pressure ratio expected performance curve obtained using a conventional design and the optimized design of the present invention for a centrifugal blower as an example;

fig. 6 is a flow-efficiency expected performance curve obtained by using a centrifugal blower as an example and adopting a conventional design structure and the optimized design structure of the present invention.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and simplification of description, and do not indicate or imply that the machine or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, and these terms are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

As shown in fig. 1 to 4, a preferred embodiment of the present invention, a three-dimensional flow impeller, which is a semi-open type impeller, which comprises a chassis 1, and a main blade 2 and a splitter blade 3 which are formed on the chassis 1, wherein the chassis 1 is of a disc structure, a circular frustum 4 is arranged in the middle of the chassis 1, the peripheral surface of the circular frustum 4 is in smooth transition with the peripheral surface of the chassis 1, a plurality of main blades 2 and a plurality of splitter blades 3 are arranged in the circumferential direction of the chassis 1, one splitter blade 3 is arranged between every two adjacent main blades 2, the main blade 2 extends from the upper end of the peripheral surface of the circular frustum 4 to the edge of the peripheral surface of the chassis 1, the size of the splitter blade 3 is smaller than that of the main blade 2, and the tail end of the splitter blade 3 extends to the edge of the peripheral surface of the chassis 1; the inlet oblique cutting angle alpha of the main blade 2 at the inlet of the impeller is 65-80 degrees, the inlet oblique cutting angle beta of the splitter blade 3 at the inlet of the impeller is 60-90 degrees, and the outlet angles gamma of the main blade 2 and the splitter blade 3 at the outlet of the impeller are both 40-65 degrees. In this embodiment, the number of the main blades 2 and the number of the splitter blades 3 are respectively 6 to 9.

Taking the centrifugal blower with the design flow of 2.3kg/s and the pressure ratio of 1.85 as an example, the conventional design structure is compared with the expected performance curve obtained by the optimized design structure of the present invention, as shown in fig. 5 and 6.

Therefore, the three-dimensional flow impeller is designed and optimized by adopting a three-dimensional flow theory based on optimal load distribution, and compared with the common structures such as the vertical axis and the zero inclination angle of the front edge (namely the inlet side) of the impeller blade in the current market, the actual flow area of the inlet of the impeller can be increased and the blocking effect at the inlet of the impeller can be reduced by setting the oblique inclination angle of the inlet of the impeller under the condition of the same mach number of the tip of the inlet of the impeller, so that the pneumatic efficiency of the impeller can be improved by 1-2 percent, the flow range can be widened by 3-6 percent, the requirements of parameters such as design flow, pressure rise and rotating speed of different units can be met, and the three-dimensional flow impeller has the advantages of small flow loss, high pneumatic efficiency, wide range of stable operation working conditions, easiness in machining and the like.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.

Claims

1. A three-dimensional flow impeller is characterized by comprising a chassis, and main blades and splitter blades which are formed on the chassis, wherein the chassis is of a disc structure, a circular frustum is arranged in the middle of the chassis, the peripheral surface of the circular frustum is in smooth transition with the peripheral surface of the chassis, a plurality of main blades and splitter blades are arranged in the circumferential direction of the chassis, one splitter blade is arranged between every two adjacent main blades, the main blades extend to the edges of the peripheral surface of the chassis from the upper end of the peripheral surface of the circular frustum, the size of each splitter blade is smaller than that of each main blade, and the tail ends of the splitter blades extend to the edges of the peripheral surface of the chassis; the inlet oblique cutting angle of the main blade at the inlet of the impeller is 65-80 degrees, the inlet oblique cutting angle of the splitter blade at the inlet of the impeller is 60-90 degrees, and the outlet angles of the main blade and the splitter blade at the outlet of the impeller are both 40-65 degrees.

2. The three-dimensional flow impeller according to claim 1, wherein each of said main blades and said splitter blades is provided with 6 to 9.