CN210715168U

CN210715168U - Centrifugal compressor with multiple eddy-eliminating holes

Info

Publication number: CN210715168U
Application number: CN201921459321.2U
Authority: CN
Inventors: 周亚锋; 张小龙; 乔社宁; 陈余平; 周根标; 祁周会; 蔺满相; 刘忠; 穆玉航; 姚艳; 尹鹏宇; 刘妮
Original assignee: Xian Shaangu Power Co Ltd
Current assignee: Xian Shaangu Power Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-09
Anticipated expiration: 2029-09-03

Abstract

The utility model discloses a centrifugal compressor with a plurality of eddy-eliminating holes, which at least comprises a casing, a rotor, a balance disc, an impeller, a clapboard and an impeller balance disc sealing component; the rotor is provided with a balance disc and an impeller; the impeller balance disc sealing assembly is coaxially arranged with the casing, is arranged around the balance disc and the impeller and is provided with a plurality of eddy-eliminating holes; the eddy eliminating holes are communicated, one side is a balance disc side, and the other side is an impeller side. The utility model discloses a vortex hole that disappears of impeller balance dish seal assembly prevents the unstable vibration of rotor.

Description

Centrifugal compressor with multiple eddy-eliminating holes

Technical Field

The utility model belongs to the technical field of centrifugal compressor seal structure, a centrifugal compressor is related to, concretely relates to centrifugal compressor who prevents unstable vibration of rotor through the vortex hole that disappears of impeller balance dish seal assembly.

Background

The centrifugal compressor is also called as a centrifugal compressor and belongs to a turbine compressor, and the working principle of the centrifugal compressor is that when an impeller rotates at a high speed, gas rotates along with the impeller, and is thrown into a diffuser behind the impeller under the action of centrifugal force; the impeller is continuously rotated and gas is continuously sucked and thrown out, thereby maintaining continuous flow of gas. Compared with a reciprocating compressor, a centrifugal compressor has the following advantages: compact structure, small size, light weight and no need of intermediate tank and other devices; however, many centrifugal compressors have unstable vibration of the rotor, which is one of the important causes of failure of the centrifugal compressor.

Disclosure of Invention

To prior art problem, the utility model aims to provide a centrifugal compressor solves the technical problem of the unstable vibration of rotor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a centrifugal compressor with multiple eddy-eliminating holes is composed of a casing, a rotor coaxial with said casing, a balance disk, an impeller coaxial with said rotor, a partition coaxial with said casing, an impeller-balance disk sealing assembly coaxial with said casing and surrounding said balance disk and impeller for sealing them, multiple eddy-eliminating holes made on said impeller-balance disk sealing assembly, and a through hole passing through said balance disk and impeller, and the included angle α between the central line of eddy-eliminating hole and the central line of rotor is 0- α -90 deg.

Further, the number of the vortex elimination holes is 2 to 99.

The shape of the vortex elimination hole comprises one of a circle, a semicircle, a rectangle, a triangle, a semicircle combined rectangle or a semicircle combined triangle; the diameter of the circle or the semicircle is 1mm to 99mm, the diameter of the circumscribed circle of the rectangle or the triangle is 1mm to 99mm, and the length of the common side of the semicircle combined rectangle and the common side of the semicircle combined triangle is 1mm to 99 mm.

Furthermore, the eddy eliminating holes are processed on the transition holes, so that the processing is more convenient.

Furthermore, the eddy eliminating holes are processed on the transition groove, so that the processing is more convenient.

The impeller balance disc sealing assembly specifically comprises the following design modes:

one of them, impeller balance dish seal assembly specifically be: and a plurality of sealing plates which protrude outwards in the radial direction are arranged on the balancing disk, adjacent sealing plates are spaced axially, and the sealing plates face the balancing disk side of the impeller balancing disk sealing assembly from the balancing disk of the rotating component.

One of them, impeller balance dish seal assembly specifically be: and a plurality of sealing sheets which protrude inwards in the radial direction are arranged on the balance disc side of the impeller balance disc sealing assembly, adjacent sealing sheets are spaced axially, and the sealing sheets face the balance disc from the balance disc side of the impeller balance disc sealing assembly.

One of them, impeller balance dish seal assembly specifically be: a plurality of sealing plates are provided on the impeller projecting radially outwardly, adjacent sealing plates being axially spaced apart, the sealing plates facing the impeller side of the impeller balance disc seal assembly from the impeller.

One of them, impeller balance dish seal assembly specifically be: and a plurality of sealing sheets which protrude inwards in the radial direction are arranged on the impeller side of the impeller balance disc sealing assembly, adjacent sealing sheets are spaced axially, and the sealing sheets face the impeller from the impeller side of the impeller balance disc sealing assembly.

Compared with the prior art, the utility model discloses following technological effect has:

the utility model discloses reach the purpose of stable vibration of rotor ingeniously through the vortex elimination hole, the design is simple, easily realizes. The utility model discloses a centrifugal compressor, working fluid flow to balance plate side from the impeller side through eliminating the vortex hole, blocks the fluid vortex in the seal chamber, has consequently reduced the fluid force that probably makes the rotor dynamics unstable.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a partial cross-sectional view of the impeller balance disk seal assembly of the present invention, with the centerline of the vortex elimination hole parallel to the centerline of the rotor.

Fig. 3 is a partial view of the impeller balance disc seal assembly of the present invention, and the shape of the vortex elimination hole is circular, or rectangular, or triangular, or semicircular combined rectangular, or semicircular combined triangular.

Fig. 4 is a partial cross-sectional view of the impeller balance disk seal assembly of the present invention, with the centerline of the vortex elimination hole not parallel to the centerline of the rotor.

Fig. 5 is a partial cross-sectional view of the impeller balance disc seal assembly of the present invention, and the vortex-eliminating holes are processed on the transition holes.

Fig. 6 is a partial cross-sectional view of the impeller balance disc seal assembly of the present invention, and the vortex-eliminating hole is processed on the transition groove.

Fig. 7 is a partial cross-sectional view of the impeller balance disk seal assembly of the present invention, the balance disk being integral with the rotor.

The reference numbers in the figures represent: the device comprises a shell 1, a rotor 2, an impeller balance disc sealing assembly 3, a balance disc 4, an impeller 5, a partition plate 6, a vortex elimination hole 7, a transition hole 8 and a transition groove 9.

The solution of the invention will be further explained and illustrated with reference to the drawings and examples.

Detailed Description

Example 1:

following the above technical solution, referring to fig. 1 to 7, the present embodiment provides a centrifugal compressor, which includes a casing 1, a rotor 2, a balance disk 4, an impeller 5, a partition plate 6, and an impeller balance disk seal assembly 3; the rotor 2 and the casing 1 are arranged coaxially, and a balance disc 4 and an impeller 5 are arranged on the rotor 2; the impeller balance disc sealing assembly 3 is arranged coaxially with the casing 1, and the partition plate 6 is arranged coaxially with the casing 1; the impeller balance disc seal assembly 3 is disposed around the balance disc 4 and the impeller 5.

The impeller balance disc sealing assembly 3 is provided with a plurality of eddy-eliminating holes 7; the eddy eliminating hole 7 is through, one side is the balance disc 4 side, and the other side is the impeller 5 side.

The number of the eddy eliminating holes 7 is 2 to 99, and is set according to actual requirements.

As shown in fig. 3, in one embodiment, the deswirler holes 7 are circular in shape; the diameter of the circle is 1mm to 99 mm. In another embodiment, the shape of the vortex elimination holes 7 is a rectangle, or a triangle, or a semicircle combined rectangle, or a semicircle combined triangle, and the shapes developed above are all favorable for vortex elimination, thereby ensuring the stability of the rotor; the profile diameter of the shape is 1mm to 99mm, and is set according to actual needs.

In another embodiment, the centre line of the anti-vortex hole 7 is parallel to the centre line of the rotor 2. In another embodiment, as shown in fig. 4, the central line of the vortex elimination hole 7 is not parallel to the central line of the rotor 2, and the included angle between the central line of the vortex elimination hole 7 and the central line of the rotor 2 is 0 to 90 degrees.

In one embodiment, the vortex elimination holes 7 are not machined in the transition holes 8. In another embodiment, shown in fig. 5, the vortex elimination hole 7 is machined on the transition hole 8.

In one embodiment, the vortex elimination holes 7 are not machined in the transition groove 9. In another embodiment, as shown in fig. 6, the vortex elimination hole 7 is machined on the transition groove 9.

The transition hole 8 and the transition groove 9 are both used for facilitating processing, and specifically, which shape is adopted is set according to actual needs.

In the following embodiments, the orientation of the seal piece is specifically disclosed.

In one embodiment, the balancing disk 4 is provided with a plurality of axially spaced sealing plates protruding radially outwards from the rotating member balancing disk 4 towards the balancing disk side of the impeller balancing disk seal assembly 3. In another embodiment the balance disc side of the impeller balance disc seal assembly 3 is provided with a plurality of radially inwardly projecting axially spaced sealing discs which face the rotary member balance disc 4 from the balance disc side of the impeller balance disc seal assembly 3.

In one embodiment, the impeller 5 is provided with a plurality of axially spaced sealing plates projecting radially outwardly from the rotating component impeller 5 towards the impeller side of the impeller balance disc seal assembly 3. In another embodiment the impeller side of the impeller balance disc seal assembly 3 is provided with a plurality of axially spaced sealing fins projecting radially inwardly from the impeller side of the impeller balance disc seal assembly 3 towards the rotating component impeller 5.

In one embodiment, the balancing disk 4 is not integral with the rotor 2, in view of the actual machining. In another embodiment, shown in figure 7, the balancing disk 4 is integral with the rotor 2.

Further, the impeller balance disc sealing assembly 3 adopts the mode of the eddy-eliminating hole 7, so that the yield of the impeller balance disc sealing assembly 3 is high, and the cost is saved.

The utility model discloses a be provided with a plurality of vortex hole that disappear centrifugal compressor, working fluid blocks the fluid vortex in the seal chamber through the vortex hole that disappears from the impeller side to the balance plate side, has consequently reduced the fluid power that probably makes the rotor dynamics unstable to prevent the unstable vibration of rotor.

Claims

1. A centrifugal compressor provided with a plurality of eddy-eliminating holes comprises a casing (1), a rotor (2), a balance disc (4), an impeller (5) and a partition plate (6), wherein the rotor (2) and the casing (1) are coaxially arranged, the balance disc (4) and the impeller (5) are sequentially arranged on the rotor (2), and the partition plate (6) and the casing (1) are coaxially arranged;

the impeller balance disc sealing assembly is characterized by further comprising an impeller balance disc sealing assembly (3), the impeller balance disc sealing assembly (3) is coaxial with the machine shell (1), the impeller balance disc sealing assembly (3) is arranged around the balance disc (4) and the impeller (5) and used for sealing the balance disc (4) and the impeller (5), a plurality of eddy eliminating holes (7) are machined in the impeller balance disc sealing assembly (3), the eddy eliminating holes (7) are through holes and penetrate through one side of the balance disc (4) and one side of the impeller (5), and an included angle α between a central line of the eddy eliminating holes (7) and a central line of the rotor (2) is 0- α -90 degrees.

2. A centrifugal compressor according to claim 1, characterized in that the number of said de-swirl holes (7) is 2 to 99.

3. The centrifugal compressor according to claim 1, wherein the shape of the deswirler hole (7) comprises one of a circle, a semicircle, a rectangle, a triangle, a combination of semicircles, or a combination of semicircles; the diameter of the circle or the semicircle is 1mm to 99mm, the diameter of the circumscribed circle of the rectangle or the triangle is 1mm to 99mm, and the length of the common side of the semicircle combined rectangle and the common side of the semicircle combined triangle is 1mm to 99 mm.

4. The centrifugal compressor according to claim 1, further comprising a transition hole (8), wherein the vortex elimination hole (7) is formed in the transition hole (8).

5. The centrifugal compressor according to claim 1, further comprising a transition groove (9), wherein the vortex elimination hole (7) is formed in the transition groove (9).

6. A centrifugal compressor according to claim 1, characterized in that said impeller balance disc seal assembly (3) is embodied as: and a plurality of sealing plates which protrude outwards in the radial direction are arranged on the balancing disk (4), adjacent sealing plates are spaced axially, and the sealing plates face the balancing disk side of the impeller balancing disk sealing assembly (3) from the balancing disk (4) of the rotating component.

7. A centrifugal compressor according to claim 1, characterized in that said impeller balance disc seal assembly (3) is embodied as: a plurality of sealing sheets protruding inwards in the radial direction are arranged on the balance disc side of the impeller balance disc sealing assembly (3), adjacent sealing sheets are spaced axially, and the sealing sheets face the balance disc (4) from the balance disc side of the impeller balance disc sealing assembly (3).

8. A centrifugal compressor according to claim 1, characterized in that said impeller balance disc seal assembly (3) is embodied as: a plurality of sealing sheets which protrude outwards in the radial direction are arranged on the impeller (5), adjacent sealing sheets are spaced axially, and the sealing sheets face the impeller side of the impeller balance disc sealing assembly (3) from the impeller (5).

9. A centrifugal compressor according to claim 1, characterized in that said impeller balance disc seal assembly (3) is embodied as: and a plurality of sealing sheets which protrude inwards in the radial direction are arranged on the impeller side of the impeller balance disc sealing assembly (3), adjacent sealing sheets are spaced axially, and the sealing sheets face the impeller (5) from the impeller side of the impeller balance disc sealing assembly (3).