CN110778721A

CN110778721A - Combined sealing ring

Info

Publication number: CN110778721A
Application number: CN201911164279.6A
Authority: CN
Inventors: 刘培军; 刘理均; 吴海霞; 王偲臣; 张小玉
Original assignee: Institute of Engineering Thermophysics of CAS
Current assignee: Institute of Engineering Thermophysics of CAS
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-02-11

Abstract

The invention belongs to the technical field of sealing rings, and particularly relates to a combined sealing ring which comprises a sealing ring and a tray ring; the sealing ring part is arranged in a sealing groove formed in the sealing surface; the disc ring tray is sleeved on the inner ring of the sealing ring, separates the sealing ring from the sealing surface and partially limits the degree of freedom of sliding of the sealing ring on the sealing surface, and simultaneously limits the extrusion deformation range of the sealing ring to be 0.4-1 time of the radius of the sealing ring. The invention has the advantages of high rotating speed, good reliability, high efficiency, long service life and high reliability.

Description

Combined sealing ring

Technical Field

The invention belongs to the technical field of sealing rings, and particularly relates to a combined sealing ring.

Background

The sealing mode of the combined sealing ring is an important part of a transmission system, and is an important part of the high-efficiency operation of the transmission system in the mechanical field. It can both play and keep current other work component structures through nimble structure and the function of combining the collocation, satisfies current operating mode, can realize combining again and guarantee sealed effect, realizes 1+1>2 sealed effect.

At present, the connection form between the rotors of the main domestic aero-engines and gas turbines and the zero-level blisk is not high in matching and sealing effects. Although the variety is relatively various, the structure function is not ideal in nature. At present, the connection form between the rotors of the main domestic aero-engines and gas turbines and the zero-level blisk is not high in matching and sealing effects.

At present, in other domestic industries, a plurality of combined sealing modes are provided, but the connecting mode of the rotating part rod-shaped inside the connecting mode is provided, and the structure mode of the outer part of the connecting mode is provided with the cylinder disk part. Meanwhile, the working condition is special, and certain oil liquid and the like can exist inside the oil tank. The functionality requirements are also high, and both good rotational characteristics need to be met and corresponding sealing properties need to be provided. In this case, the axial groove seal like the conventional seal type, as shown in fig. 2, cannot be satisfied without modifying the structure of the components such as the inner rotor shaft. The combined sealing mode plays a role, the structure of the rotor rod piece of the combined sealing mode is not damaged, and a special sealing groove is not required to be specially formed in a matching piece. A sealed environment can be created in a self-contained manner and the performance of the structural components can be guaranteed.

At present, a plurality of combined sealing modes can play a role in stable sealing, and the special sealing performance requirements of the rotor and the zero-order blisk are not influenced. The current combined sealing mode can achieve stable sealing without influencing special performance requirements, and is shown in figure 2, figure 3 or figure 4. These sealing methods are combined sealing methods of the present rotating rod and the present coil tray, and thus the limitations are very large.

First, as shown in fig. 2:

1. the inner ring and the outer ring are in tight fit, so that the precision required by the machining size is too high.

2. Meanwhile, the upper part of the part pressing mode is irregular elliptical deformation, and the part pressing mode is easy to damage after long time. The fatigue performance is low.

3. The rotating performance is affected when the size processing is not in place.

Second, fig. 3:

1. the fit clearance is large and the sealing performance is not firm.

2. The falling-off is easy to cause after long-term use.

Third, as in fig. 4:

1. the inner and outer rings have high dimensional requirement precision and high cost.

2. The compression deformation is small, and the sealing performance is low.

3. Can easily fall off from one side after long-term use.

Disclosure of Invention

In order to solve the technical problems, the invention provides a combined sealing ring which has the advantages of high rotating speed, good reliability, high efficiency, long service life and high reliability.

The technical scheme adopted by the invention to achieve the aim is as follows:

the invention provides a combined sealing ring, which comprises a sealing ring and a tray ring; the sealing ring part is arranged in a sealing groove formed in the sealing surface; the disc ring tray is sleeved on the inner ring of the sealing ring, separates the sealing ring from the sealing surface and partially limits the degree of freedom of sliding of the sealing ring on the sealing surface, and simultaneously limits the extrusion deformation range of the sealing ring to be 0.4-1 time of the radius of the sealing ring.

In order to facilitate the processing of the invention, the outer surface of the tray ring tray includes an inner arc surface and an outer arc surface, the sealing ring is arranged in the inner arc surface, and the area of the outer arc surface is larger than that of the inner arc surface.

In order to reduce the shearing deformation of the combined sealing ring during use, the cross section of the outer arc surface is arc-shaped.

Preferably, the intrados includes an arc portion concentric with the sealing surface and two arc portions perpendicular to the sealing surface, and the two arc portions perpendicular to the sealing surface are respectively disposed at two ends of the arc portion concentric with the sealing surface.

In order to limit the extrusion deformation amount of the sealing ring, the depth of the cross section of the inner cambered surface is larger than the radius of the sealing ring and smaller than 1.5 times of the radius of the sealing ring.

In order to limit the amount of extrusion deformation of the seal ring, it is preferable that the depth of the intrados cross section is greater than the radius of the seal ring and less than 1.3 times the radius of the seal ring.

In order to avoid scratching the sealing ring, a chamfer is arranged between the arc part vertical to the sealing surface and the arc part concentric with the sealing surface.

The invention can bring the following beneficial effects:

1. the sealing performance of the combined seal is effectively realized, the outer-side hard concave sealing ring can be effectively deformed through extrusion under the working condition, and the outer wall of the inner-wall spline adapter is tightly attached through deformation. An effective way of sealing the groove is created for the inner annular rubber ring;

2. the size processing requirements of the inner ring and the outer ring are reduced, and the sealing size characteristics calculated through different working conditions are obviously reflected;

3. the sealing performance is good, the gaps on the two sides fully provide reasonable deformation after the inner ring is compressed, and the outer ring can compress the lower side by slight deformation to achieve the sealing performance;

4. the service life is long, and the damage degree of the upper part of the outer ring caused by long-term use is effectively reduced;

5. meanwhile, the inner ring is prevented from falling off and the sealing is not damaged due to long-term use;

6. meanwhile, the overvoltage to the bottom ends at the two sides of the inner ring part is reduced, and the influence on a rotating part is reduced;

drawings

Fig. 1 is a cross-sectional view of the composite seal ring of the present invention.

Fig. 2 is an implementation of the background art.

Fig. 3 is an implementation of the background art.

Fig. 4 is an implementation of the background art.

Fig. 5 is a schematic view of an installation of the present invention, wherein: 10-combined sealing ring, 1-zero order blisk (combined sealing ring external attaching piece), 2-D head bolt, 3-steel wire retainer ring, 6-spline self-locking nut, 5-2 level rotor assembly, 6-1 level rotor assembly, 7-zero order disc balance ring, 8-spline adapter retaining ring, 9-spline adapter (combined sealing ring internal attaching piece) and No. 11-1 bearing.

Detailed Description

The invention will now be described in detail with reference to the drawings attached hereto

In one embodiment of the present invention, a combination seal ring as shown in fig. 1 includes a seal ring 101 and a disc tray 102; the sealing ring 101 is partially arranged in a sealing groove formed on the sealing surface; the ring tray 102 is installed in the inner ring of the seal ring 101, separates the seal ring 101 from the sealing surface and partially limits the degree of freedom of the seal ring 101 sliding on the sealing surface, and the ring tray 102 simultaneously limits the range of the deformation of the seal ring 101 to 0.4 to 1 times the radius of the seal ring.

In one embodiment, as shown in fig. 1, to facilitate the processing of the present invention, the outer surface of the tray ring 102 includes an inner arc surface 103 and an outer arc surface 104, the sealing ring 101 is disposed inside the inner arc surface 103, and the area of the outer arc surface 104 is larger than the area of the inner arc surface 103.

In one embodiment, outer arcuate surface 104 has a circular cross-section to reduce shear deformation of seal ring 101 during use of the present invention.

In one embodiment, as shown in fig. 1, the intrados surface 103 includes an arc portion concentric with the sealing surface and two arc portions perpendicular to the sealing surface, the two arc portions perpendicular to the sealing surface being respectively disposed at both ends of the arc portion concentric with the sealing surface.

In one embodiment, as shown in fig. 1, to limit the amount of squeeze deformation of the seal ring, the depth of the cross-section of the intrados 103 is greater than the radius of the seal ring 101 and less than 1.5 times the radius of the seal ring 101. In one embodiment, as shown in fig. 1, to limit the amount of squeeze deformation of the seal ring, the depth of the cross-section of the intrados 103 is greater than the radius of the seal ring 101 and less than 1.3 times the radius of the seal ring 101. In one embodiment, as shown in fig. 1, to avoid scratching the seal ring, a chamfer is provided between the circular arc portion perpendicular to the sealing surface and the circular arc portion concentric with the sealing surface.

The invention will now be further described with respect to specific installation conditions:

as shown in fig. 5, the composite seal ring 10 according to the present invention is installed between the spline adapter 9 (inner tightening member of the composite seal ring 10) and the zero-order blisk 1. The spline adapter 9 and the zero-level blisk 1 are connected and held through a spline adapter retaining ring 8. Will seal for both sides around through the sealing washer, the front end is close to No. 1 bearing 11 department and is the spline joint, has lubricating oil right side cavity for the air in, seals through combination sealing washer 10 and separates. The sealing function is realized. During operation, the zero-level rotor rotates, and dynamic sealing is realized through the combined sealing ring 10.

Claims

1. A combination seal ring, comprising a seal ring (101) and a disc tray (102); the sealing ring (101) is partially arranged in a sealing groove formed in the sealing surface; the disc ring tray (102) is sleeved in an inner ring of the sealing ring (101) and used for separating the sealing ring (101) from a sealing surface and partially limiting the degree of freedom of sliding of the sealing ring (101) on the sealing surface, and the disc ring tray (102) is simultaneously used for limiting the extrusion deformation range of the sealing ring (101) to be 0.4-1 time of the radius of the sealing ring.

2. The combination seal ring according to claim 1, wherein the outer surface of the disk tray (102) comprises an inner arc surface (103) and an outer arc surface (104), the seal ring (101) is disposed in the inner arc surface (103), and the area of the outer arc surface (104) is larger than the area of the inner arc surface (103).

3. The composite seal ring according to claim 2, wherein the outer arc surface (104) has a circular arc-shaped cross section.

4. A composite seal ring according to claim 2, wherein the intrados surface (103) comprises an arc portion concentric with the sealing surface and two arc portions perpendicular to the sealing surface, the two arc portions perpendicular to the sealing surface being provided at both ends of the arc portion concentric with the sealing surface, respectively.

5. A composite seal ring according to claim 2, characterized in that the depth of the intrados surface (103) in cross-section is greater than the radius of the seal ring (101) and less than 1.5 times the radius of the seal ring (101).

6. A composite seal ring according to claim 5, characterized in that the depth of the intrados surface (103) in cross-section is greater than the radius of the seal ring (101) and less than 1.3 times the radius of the seal ring (101).

7. The composite seal ring according to claim 4, wherein a chamfer is provided between the circular arc portion perpendicular to the sealing surface and the circular arc portion concentric with the sealing surface.