Double-V-shaped metal sealing ring

Abstract

The double-V-shaped metal sealing ring is suitable for air-tight sealing of an air inlet inner casing and comprises a sealing ring body, the section of the sealing ring body is of a double-V-shaped structure, the double-V-shaped structure can deform when being extruded in a high-temperature and high-pressure environment, the contact area between the sealing ring body and the air inlet inner casing is increased, and the sealing ring body is made of metal. In addition, the air inlet inner casing is simple in design and easy to manufacture.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of the sealing ring, especially to a double V type metal sealing ring. BACKGROUND

[0002] The metal sealing ring in the aero-engine is an important sealing component, which is usually used to prevent gas leakage, maintain the pressure of the gas passage, and improve the reliability and efficiency of the engine, and has a very important influence on the performance of the engine, which will directly affect the improvement of the turbocharging ratio and the turbine efficiency. At present, the metal sealing ring in the domestic sealing does not adjust the contact area of the sealing ring and the part to be sealed with the change of the environment, which reduces the sealing performance of the sealing ring SUMMARY

[0003] Therefore, the double V type metal sealing ring solves the technical problem of low structural sealing performance of the prior art.

[0004] A double V type metal sealing ring is suitable for air sealing of an inlet inner casing, comprising a body of a sealing ring, the cross section of the body is provided with a double V type structure, the double V type structure can be deformed under extrusion in a high temperature and high pressure environment, the contact area of the body and the inlet inner casing is increased, and the air sealing performance of the inlet inner casing is improved.

[0005] Preferably or optionally, the double V type structure comprises a wave peak arc segment, the center of the wave peak arc segment is towards the center point of the body, and an auxiliary sealing segment is symmetrically provided with the wave peak arc segment as the center, wherein,

[0006] The wave peak arc segment is smaller in radial dimension when deformed under extrusion in a high temperature and high pressure environment, so as to promote the auxiliary sealing segment to contact with the ring surface of the inlet inner casing.

[0007] Preferably or optionally, the double V type structure further comprises a wave valley arc segment, the wave valley arc segment can promote the auxiliary sealing segment to be deformed, wherein,

[0008] The bottom end of the wave peak arc segment is transitioned to the auxiliary sealing segment through the wave valley arc segment, and the arc center of the wave peak arc segment is away from the center point of the body.

[0009] Preferably or optionally, one end of the auxiliary sealing segment is a straight line or an arc line and is transitioned to the wave valley arc segment, the other end is a free end, the free end is towards the wave peak arc segment in the initial state, and does not contact with the wave peak arc segment.

[0010] Preferably or optionally, the free end is provided with a rounded corner structure.

[0011] Preferably or optionally, the expansion angle of the trough arc segment is greater than the expansion angle of the peak arc segment.

[0012] The technical benefits of this utility model are:

[0013] The structure of the utility model has a double V-shaped structure, which enables the sealing ring to withstand greater axial force and load, and has good stability. The contact point between the sealing ring and the metal counterpart increases with the change of temperature. The larger the contact area, the better the airtight performance. The sealing ring has good elasticity, strong vibration resistance, long service life, simple design and easy manufacturing. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0015] Figure 1 is a schematic diagram of the main body structure;

[0016] Figure 2 for Figure 1 Schematic diagram of the double V-shaped structure in the middle AA section;

[0017] Figure 3 It is a schematic diagram of the double V-shaped structure after being squeezed or compressed, where:

[0018] 1. Main body; 2. Auxiliary sealing section; 3. Wave crest arc section; 4. Wave trough arc section. DETAILED DESCRIPTION

[0019] The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0020] The following describes the embodiments of the present disclosure through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. The present disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0021] It is to be understood that the embodiments described hereinbelow within the scope of the appended claims. It will be apparent to one of ordinary skill in the art that aspects described herein can be embodied in a wide variety of forms, and that any specific structure and / or function described herein is merely illustrative. Based on the teachings herein one skilled in the art should appreciate that an aspect described herein can be implemented independently of any other aspects and that an aspect described herein can be implemented both as any number of software and / or hardware structures and as any number of processes and / or operations. For example, an apparatus can be implemented using any number of the aspects described herein, and / or a method can be implemented using any number of the aspects described herein.

[0022] As shown in the double V-shaped metal seal ring, suitable for the air tight seal of the intake inner casing, the seal ring is generally installed on the mounting seat or the shaft or other components to air-tightly seal the intake inner casing. It includes the body 1 of the seal ring, the cross section of the body 1 is provided with a double V-shaped structure, which can be deformed under high temperature and high pressure environment, increase the contact area of the body 1 and the intake inner casing, and improve the air tightness of the intake inner casing. Figures 1 to 3 As the specific embodiment provided in the present case, the double V-shaped structure includes a wave peak arc segment 3, the center of the wave peak arc segment 3 is towards the center point of the body 1, and an auxiliary sealing segment 2 is symmetrically arranged around the wave peak arc segment 3, wherein the wave peak arc segment 3 is smaller in radial dimension or shorter in length when deformed under high temperature and high pressure environment, and the shape change can promote the contact between the auxiliary sealing segment 2 and the ring surface of the intake inner casing, thereby increasing the contact area of the body 1 and the intake inner casing, that is, when the body 1 is extruded or compressed under high temperature and high pressure environment, the contact area between the body 1 and the inner ring surface of the intake inner casing can be increased, thereby improving the air tightness of the intake inner casing.

[0023]

[0024] ​As the specific embodiment provided in the present case, the double-V-shaped structure further comprises valley arc segments 4, which can promote the deformation of the auxiliary sealing segments 2, wherein the bottom ends of the peak arc segments 3 are respectively transitioned to the auxiliary sealing segments 2 through the valley arc segments 4, and the arc centers of the peak arc segments 3 are away from the center point of the body 1. One end of the auxiliary sealing segment 2 is a straight line or an arc line and is transitioned to the valley arc segment 4, and the other end is a free end, which is directed to the peak arc segment 3 in the initial state and does not contact the peak arc segment 3. It should be pointed out that the one end of the auxiliary sealing segment 2 being a straight line or an arc line is determined according to the working environment of the inlet inner casing and the characteristics of the metal material of the body 1. For example, the body 1 is made of high-temperature alloy GH4169 or GH738 material. The performance of the high-temperature alloy GH4169 is better, and the one end of the auxiliary sealing segment 2 is provided as a straight line, while the GH738 material needs to be provided as an arc line to adapt to the deformation of the free end. Preferably, the free end is provided as a structure with a 90° rounded corner.

[0025] Further, as shown in Figure 3 the expansion angle of the valley arc segment 4 is greater than that of the peak arc segment 3, for example, the expansion angle of the peak arc segment 3 is 55°-65°, and the expansion angle of the valley arc segment 4 is 95°-105°. When the peak arc segment 3 is deformed, the expansion angle becomes larger and the height becomes smaller, which can quickly promote the expansion angle of the peak arc segment 3 to become larger, accelerate the deformation of the free end, and overall, quickly increase the contact surface of the body 1 and the inlet inner casing.

[0026] Research shows that a 1% reduction in sealing leakage can increase engine thrust by 1% and reduce fuel consumption by 0.1%. For advanced engines, under the condition that the engine speed and turbine rotor inlet temperature remain unchanged, a 1% reduction in high-pressure turbine sealing leakage will increase the thrust by 0.8% and reduce the fuel consumption by 0.5%. However, due to the complex and harsh working environment of the aircraft engine, under high temperature, high pressure, high vibration and high speed, the parts are required to be light in weight, good in sealing, long in service life and strong in stability, so the design and manufacture of the sealing ring are very difficult. Therefore, compared with the existing metal sealing ring, the double-V-shaped metal sealing ring has better design strength, stronger stability, more contact points with metal counterparts, larger contact area with temperature change, better sealing effect, and can seal inwardly and outwardly.

[0027] The above is only a specific embodiment of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any changes or replacements within the technical scope disclosed in the present disclosure can be easily thought of by those skilled in the art, which should be covered within the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A double V-shaped metal seal ring suitable for air-tight seal of an air inlet inner casing, characterized in that, The body including a sealing ring, a cross section of the body is provided with a double-V-shaped structure, the double-V-shaped structure can be deformed when being extruded in a high-temperature and high-pressure environment, increase a contact area of the body with an air inlet inner casing, and improve air-tight sealing performance of the air inlet inner casing.

2. The double V-shaped metal seal ring of claim 1, wherein, The double-V-shaped structure includes a wave-peak arc-shaped segment, a center of the wave-peak arc-shaped segment faces a center point of the body, and an auxiliary sealing segment is symmetrically arranged about the wave-peak arc-shaped segment as a center, wherein When the wave-peak arc-shaped segment is deformed when being extruded in a high-temperature and high-pressure environment, a radial dimension of the wave-peak arc-shaped segment is reduced, so as to facilitate the auxiliary sealing segment to contact with a ring surface of the air inlet inner casing.

3. The double V-shaped metal seal ring of claim 2, wherein, The double-V-shaped structure further includes a wave-valley arc-shaped segment, the wave-valley arc-shaped segment can facilitate the auxiliary sealing segment to be deformed, wherein Bottom ends of the wave-peak arc-shaped segment are respectively transitioned to the auxiliary sealing segment through the wave-valley arc-shaped segment, and an arc center of the wave-peak arc-shaped segment faces away from the center point of the body.

4. The double V-shaped metal seal ring of claim 3, wherein, One end of the auxiliary sealing segment is a straight line or an arc line and is transitioned to the wave-valley arc-shaped segment, and the other end is a free end, the free end faces the wave-peak arc-shaped segment in an initial state and does not contact the wave-peak arc-shaped segment.

5. The double V-shaped metal seal ring of claim 4, wherein, The free end is provided with a rounded corner structure.

6. The double V-shaped metal seal ring of claim 4, wherein, An expansion angle of the wave-valley arc-shaped segment is greater than an expansion angle of the wave-peak arc-shaped segment.

7. The double V-shaped metal seal ring of claim 6, wherein, The expansion angle of the wave-peak arc-shaped segment is 55°-65°, and the expansion angle of the wave-valley arc-shaped segment is 95°-105°.

8. The double V-shaped metal seal ring of claim 1, wherein, The body is made of high-temperature alloy GH4169 or GH738.

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