CN216241289U

CN216241289U - Roots blower impeller with split structure

Info

Publication number: CN216241289U
Application number: CN202123025062.2U
Authority: CN
Inventors: 高科; 高爱珍; 刘贵军; 王骏赛
Original assignee: Shandong Zhangqiu Blower Co Ltd
Current assignee: Shandong Zhangqiu Blower Co Ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-04-08
Anticipated expiration: 2031-12-02

Abstract

The utility model provides a Roots blower impeller with a split structure, which comprises an impeller main body and two impeller wings, wherein an impeller shaft hole is formed in the center of the inside of the impeller main body, a plurality of impeller weight removing holes are symmetrically formed in two sides of the impeller shaft hole, a plurality of impeller bolt holes are respectively formed in two side faces of the impeller main body, a plurality of impeller weight removing holes are formed in the inside of each impeller wing in the direction parallel to the impeller shaft hole, a plurality of impeller bolt holes are formed in the inside of each impeller wing in the direction perpendicular to the impeller shaft hole, the impeller bolt holes are matched with the impeller bolt holes, and bolts and impeller hole covers are arranged in the impeller bolt holes. The Roots blower using the impeller is designed through the split structure of the impeller under the condition that the appearance and the space volume of the blower are not changed, so that the rotating speed of the blower is improved, and the flow of the blower is further improved. The utility model is especially suitable for large Roots blowers with high rotating speed and large flow.

Description

Roots blower impeller with split structure

Technical Field

The utility model relates to the technical field of blowers, in particular to a Roots blower impeller with a split structure.

Background

The roots blower is a positive displacement gas blower, and is widely used in more and more special fields due to the characteristics of simple structure, convenient use and maintenance and forced exhaust. In many industries, especially in vacuum pressure swing adsorption oxygen production industry, Roots blowers are widely used. With the increasing demand of the steel and nonferrous metal industry for oxygen, the pressure swing adsorption oxygen production industry has the increasing demand for fan flow. However, the maximum flow of the existing roots blower cannot meet the use requirement due to the restriction of the shape and the space volume.

The flow of the Roots blower is positively correlated with the rotating speed, so that the rotating speed of the blower is increased, and the flow of the blower can be increased. Because of large-traffic fan is bulky, impeller weight is heavy, for control cost, the impeller is for general grey cast iron or nodular cast iron material, receives the restriction of the biggest linear velocity of impeller material, and the air-blower rotational speed can not be too high for the flow of air-blower can not satisfy customer's demand.

SUMMERY OF THE UTILITY MODEL

The utility model provides a Roots blower impeller with a split structure, aiming at the technical problems that the existing Roots blower impeller is made of gray cast iron, the rotating speed of the blower cannot be too high due to the limitation of the maximum linear velocity of the impeller material, and the flow of the blower cannot meet the use requirement.

The technical scheme includes that the Roots blower impeller with the split structure comprises an impeller main body and two impeller wings, wherein an impeller shaft hole is formed in the center of the interior of the impeller main body, a plurality of impeller weight removing holes are symmetrically formed in two sides of the impeller shaft hole, a plurality of impeller bolt holes are formed in two side faces of the impeller main body respectively, a plurality of impeller weight removing holes are formed in the interior of each impeller wing in the direction parallel to the impeller shaft hole, a plurality of impeller bolt holes are formed in the interior of each impeller wing in the direction perpendicular to the impeller shaft hole and matched with the impeller bolt holes, bolts and impeller hole covers are arranged in the impeller bolt holes and located on the outer sides of the bolts, the impeller main body and the two impeller wings are fixedly connected through the bolts and gaskets, and the impeller bolt holes are filled and welded and fixed through the impeller hole covers.

Preferably, the impeller main body is made of gray cast iron or nodular cast iron.

Preferably, the impeller wings and the impeller hole cover are made of aluminum alloy.

Preferably, the height of the impeller body is 1.0-4.0 times the height of the impeller wings.

Preferably, the impeller deduplication holes are circular, elliptical or triangular in shape.

Preferably, the number of impeller de-weighting holes is 4.

Preferably, the shape of the wing deduplication holes is circular, oval or triangular.

Preferably, the number of the wing de-weighting apertures is 2.

Preferably, the number of the wing bolt holes and the impeller bolt holes is plural.

The impeller structure has the beneficial effects that the impeller is divided into three parts on the basis of ensuring the structural strength of the impeller, and the three parts are connected and fixed together by using bolts. The impeller main body is greatly stressed and is made of gray cast iron or nodular cast iron. Because the size of the impeller main body in the split structure is smaller than that of the impeller in the integral structure, the linear speed of the impeller main body completely meets the requirement of the maximum allowable linear speed of gray cast iron or nodular cast iron. The impeller wing bears small force, but the linear velocity is very high, and the impeller wing is made of aluminum alloy materials which can bear high rotating speed. The volume of the impeller wing is small, and the specific gravity of the aluminum alloy is small, so that the cost of the whole impeller material is not changed greatly. On the basis of ensuring the structural strength of the impeller, the rotating speed of the impeller of the air blower is improved to the greatest extent, the cost of the impeller is not increased, and the purpose of improving the flow of the air blower at high cost performance is achieved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the impeller body;

fig. 3 is a sectional view of a bolt fixing portion.

The symbols in the drawings illustrate that:

1. an impeller body; 101. an impeller shaft hole; 102. an impeller weight removal hole; 103. impeller bolt holes; 2. an impeller blade; 201. a wheel wing weight removal hole; 202. wheel wing bolt holes; 3. a bolt; 301. a gasket; 4. impeller eye covers.

Detailed Description

The present invention will be further described with reference to the following examples.

Fig. 1 to 3 show an embodiment of a roots blower impeller of a split structure according to the present invention, which includes an impeller body 1 and two impeller wings 2, wherein an impeller shaft hole 101 is formed in the center of the interior of the impeller body 1, a plurality of impeller deduplication holes 102 are symmetrically formed on both sides of the impeller shaft hole 101, a plurality of impeller bolt holes 103 are respectively formed in both side surfaces of the impeller body 1, a plurality of impeller deduplication holes 201 are formed in the interior of each impeller wing 2 in a direction parallel to the impeller shaft hole 101, a plurality of impeller bolt holes 202 are formed in the interior of each impeller wing 2 in a direction perpendicular to the impeller shaft hole 101, the impeller bolt holes 202 are matched with the impeller bolt holes 103, bolts 3 and impeller hole covers 4 are formed in the interior of the impeller bolt holes 202, the impeller hole covers 4 are located on the outer sides of the bolts 3, the impeller body 1 and the two impeller wings 2 are fixedly connected by the bolts 3 and spacers 301, and the impeller bolt holes 202 are filled in the impeller hole covers 4 and are welded and fixed.

In the present embodiment, in order to improve the flow rate of the roots blower, the blower impeller is divided into the impeller body 1 and the two impeller blades 2, and the height L2 of the impeller body 1 is 1.0 to 4.0 times the height L1 of the impeller blades 2. The impeller main body 1 is made of gray cast iron or nodular cast iron, the impeller wings 2 and the impeller hole cover 4 are made of aluminum alloy, and the impeller main body 1 and the impeller wings 2 are respectively and independently cast and molded. After casting, a joint surface, an impeller bolt hole 103 and a wheel wing bolt hole 202 are respectively machined, the number of the wheel wing bolt holes 202 and the number of the impeller bolt holes 103 are multiple, an impeller main body 1 and two impeller wings 2 are fixedly connected by using bolts 3 and gaskets 301, finally, the upper ends of the wheel wing bolt holes 202 are filled with impeller hole covers 4 and are welded firmly, and finally, the molded lines, the end faces and the outer circles are integrally machined. The structural design divides the impeller into three parts on the basis of ensuring the structural strength of the impeller, and the three parts are connected and fixed together by using bolts 3. The impeller main body 1 is made of gray cast iron or nodular cast iron with large stress. Because the size of the impeller main body 1 in the split structure is smaller than that of the impeller in the integral structure, the linear speed of the impeller main body 1 completely meets the requirement of the maximum allowable linear speed of gray cast iron or nodular cast iron. The impeller blade 2 has small bearing capacity but high linear speed, and is made of aluminum alloy materials capable of resisting high rotating speed. The volume of the impeller wing 2 is small, and the specific gravity of the aluminum alloy is small, so that the cost of the whole material of the impeller is not changed greatly. By adopting the Roots blower impeller with the split structure, the rotating speed can be improved by 60 percent (by 25 percent) compared with that of a gray cast iron impeller with an integral structure; the flow rate is improved by 60 percent compared with the gray cast iron impeller with the integral structure (25 percent compared with the nodular cast iron impeller with the integral structure); on the basis of ensuring the structural strength of the impeller, the rotating speed of the impeller of the air blower is improved to the greatest extent, the cost of the impeller is not increased, and the purpose of improving the flow of the air blower at high cost performance is achieved.

In one embodiment, the number of impeller de-weighting apertures 102 is 4 and the shape of the impeller de-weighting apertures 102 is circular, elliptical, or triangular. The design reduces the weight of the impeller body 1, is beneficial to casting and forming, and reduces the cost of the impeller body.

In a specific embodiment, the number of the vane weight-removing holes 201 is 2, and the shape of the vane weight-removing holes 201 is circular, oval or triangular, which not only reduces the weight of the vane, but also facilitates the casting and forming of the vane, and simultaneously reduces the cost of the vane.

The utility model provides a Roots blower impeller with a split structure, the Roots blower using the impeller improves the rotating speed of the blower and further improves the flow of the blower through the split structure design of the impeller under the condition of not changing the appearance and the space volume of a blower, and the impeller is particularly suitable for large Roots blowers with high rotating speed and large flow.

However, the above description is only exemplary of the present invention, and the scope of the present invention should not be limited thereby, and the replacement of the equivalent components or the equivalent changes and modifications made according to the protection scope of the present invention should be covered by the claims of the present invention.

Claims

1. The utility model provides a roots blower impeller of components of a whole that can function independently, characterized by: the impeller is characterized by comprising an impeller main body and two impeller wings, wherein an impeller shaft hole is formed in the center of the inside of the impeller main body, a plurality of impeller weight removing holes are symmetrically formed in two sides of the impeller shaft hole, a plurality of impeller bolt holes are formed in two side faces of the impeller main body respectively, a plurality of impeller weight removing holes are formed in the inside of each impeller wing and parallel to the impeller shaft hole, a plurality of impeller bolt holes are formed in the inside of each impeller wing and perpendicular to the impeller shaft hole, the impeller bolt holes are matched with the impeller bolt holes, bolts and impeller hole covers are arranged in the impeller bolt holes, the impeller hole covers are located on the outer sides of the bolts, the impeller main body and the two impeller wings are fixedly connected through the bolts and gaskets, and the impeller bolt holes are filled with the impeller hole covers and are welded and fixed.

2. The split-construction roots blower impeller of claim 1, wherein: the impeller main body is made of gray cast iron or nodular cast iron.

3. The split-construction roots blower impeller as claimed in claim 2, wherein: the impeller wings and the impeller hole cover are made of aluminum alloy.

4. The split-construction roots blower impeller as claimed in claim 3, wherein: the height of the impeller main body is 1.0-4.0 times of the height of the impeller wing.

5. The split-construction roots blower impeller of claim 4, wherein: the impeller de-weighting hole is circular, oval or triangular.

6. The split-construction roots blower impeller of claim 5, wherein: the impeller de-weighting holes are 4 in number.

7. The split-construction roots blower impeller of claim 6, wherein: the shape of the wheel wing weight removal hole is circular, oval or triangular.

8. The split-construction roots blower impeller of claim 7, wherein: the number of the wheel wing de-weight holes is 2.

9. The split-construction roots blower impeller of claim 8, wherein: the number of the wheel wing bolt holes and the number of the impeller bolt holes are multiple.