CN201992063U

CN201992063U - High-pressure seal ring

Info

Publication number: CN201992063U
Application number: CN2011201461670U
Authority: CN
Inventors: 王鹏; 蔡聪语; 雷世斌
Original assignee: Guizhou Aerospace Precision Products Co Ltd
Current assignee: Aerospace Fine Co., Ltd.
Priority date: 2011-05-10
Filing date: 2011-05-10
Publication date: 2011-09-28
Anticipated expiration: 2021-05-10

Abstract

The utility model discloses a high-pressure seal ring which is formed by connecting a limit ring (1) with a rubber circle (2), wherein an inner ring of the limit ring (1) is connected with the rubber circle (2) through tooth-shaped mould pressing, the limit ring (1) comprises an outer torus (3), an inner torus (4) and limit surfaces (5) at both ends, and the inner torus (4) of the limit ring (1) is a tooth-shaped surface. When the high-pressure seal ring is used in static seal, seal pressure can reach 20.6MPa (3000psi), and seal effects are rather excellent. The high-pressure seal ring not only has the advantages of small friction resistance, small leakage quantity and easiness in processing, but also has the advantage of good seal effects. The use cost of enterprises can be greatly reduced, and the waste is decreased. The high-pressure seal ring is fast and simple to manufacture, and has high safe reliability and convenience in maintenance.

Description

A kind of high-pressure seal ring

Technical field

The utility model relates to a kind of high-pressure seal ring, belongs to the seal ring technical field.

Background technique

In Course Exercise in Machinery Elements Design, the kind of seal ring is a lot, and shape is also had nothing in common with each other.The seal ring of some band eyelet, seal ring and eyelet are that circular face contacts, and in use rotation easily connects insecure.Some rubber seal is that line contacts with to be connected, as round rubber seal ring, C shape rubber seal, v-ring etc.These rubber seal material flowability are big, and leakage rate is big.And rubber material be squeezed into easily on the plane of eyelet and influence that the installation of bolt is steadily qualitative, sealing etc.Especially the seal ring on high-pressure bottle, common seal ring often are easy to leak, and deformation failure etc. cause mechanical failure when serious.If in the launch vehicle that rocket, aircraft, high ferro etc. are travelled at a high speed, also be easy to accidents causedly, cause the loss of very big property and life.

Summary of the invention

The purpose of this utility model is, on the plane that provide that a kind of seal ring in use can not rotate and be connected firmly, seal ring is difficult for being squeezed into eyelet and influence the high-pressure seal ring of sealing and withstand voltage properties, to overcome the deficiencies in the prior art.

The technical solution of the utility model: a kind of high-pressure seal ring of the present utility model is that this high-pressure seal ring is connected to form by limited ring and rubber ring; The interior ring of limited ring is connected by the profile of tooth mold pressing with rubber ring.

In the aforementioned seal ring, described limited ring comprises the confined planes at outer ring surface, inner ring surface and two ends; Inner ring surface is a toothed surface.

In the aforementioned seal ring, the beginning of the cross section of described rubber ring is the apple shape cross section; The apple shape cross section comprises external tooth form face, interior ring arc convex surface and is located at the external tooth form face and the sealing surface of interior ring arc convex surface both sides; Be connected through the transition arc surface between external tooth form face and the sealing surface; The shape of external tooth form face is corresponding with the profile of tooth of the inner ring surface of limited ring.

In the aforementioned seal ring, the distance b between the confined planes at described limited ring two ends be between rubber ring two sealing surfaces apart from 0.25～0.6 times of B.

Owing to adopted technique scheme, the sectional shape of the utility model seal ring is an apple shape, and the seal ring compression molding, and seal ring is fixed in the support, eyelet has limited rubber material fully and has been squeezed into the space, and surface of contact contacts well with eyelet simultaneously.Seal ring is that face contacts with to be connected, significantly increases sealing load.These high-pressure seal rings can bear static sealing pressure 20.6MPa (3000psi); Dynamic seal (packing) pressure 41.3MPa (6000psi); Explosion sealing load 82.6MPa (12000psi).Have good resilience and repeat performance.Have the plastic deformation of the state of anti-high and low pressure the and the strong characteristics of sealing under the vacuum cryogenic, have anti-poison or corrosive gas seal performance.Position during installation is more stable, and assembling can not produce to twist and turn round damage easily, and distortion is rolled, and the anti-performance that chews is good.When using the utility model in static seal, the experiment proved that its sealing effect is quite desirable.Therefore, the utility model compared with prior art, the utility model has not only that surface friction drag is little, leakage rate is little, the advantage of easy processing, but also has advantage of good sealing effect.Adopt the utility model, can reduce the user cost of enterprise greatly, cut the waste, and produce quick and easy, the safety reliability height, easy to maintenance.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the structural representation of limited ring;

Fig. 3 is the structural representation of seal ring;

Fig. 4 is the crux size schematic representation of limited ring and seal ring;

Fig. 5 is an application example one of the present utility model;

Fig. 6 is an application example two of the present utility model;

Fig. 7 is an application example three of the present utility model.

Being labeled as in the accompanying drawing: ring arc convex surface, 8-sealing surface, 9-transition circle cambered surface, 10-link, 11-bolt, 12-packing ring, 13-rivet in 1-limited ring, 2-rubber ring, 3-outer ring surface, 4-inner ring surface, 5-confined planes, 6-external tooth form face, the 7-.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.But conduct is not to any restriction foundation of the present utility model.

Embodiment.The utility model constitutes according to following high pressure sealing method, as shown in Figure 1, this method employing is pressed into rubber ring and limited ring tooth die the method for one, by limited ring support rubber circle, prevent that rubber ring from producing non-circle distortion, the maximum distortion of the confined planes restriction rubber ring by the limited ring two ends reaches maximum sealing load simultaneously.As shown in Figure 3, the Cross section Design with rubber ring becomes the apple shape cross section; The apple shape cross section comprises two sealing surfaces, two transition circle cambered surfaces and interior ring arc convex surface; By two sealing surfaces sealing radial pressure; By interior ring arc convex surface sealing axial pressure; Control rubber ring by two transition circle cambered surfaces and inwardly flowed by axial pressure when extruding rubber, prevent that rubber ring from clamp-oning to be connected and lost efficacy, obtain the maximum axial sealing load simultaneously.As shown in Figure 2, the inner ring surface of described limited ring is a toothed surface, when rubber ring is connected with the limited ring mold pressing, in the inner ring surface corresponding outer shroud toothed surface of rubber ring outer shroud formation with limited ring, prevent that rubber ring from rotating in limited ring, increase the bonded area of rubber ring and limited ring simultaneously, thereby increased the cohesive force of limited ring and rubber ring.As shown in Figure 4, the distance b between the confined planes at described limited ring two ends be between rubber ring two sealing surfaces apart from 0.25～0.6 of B.Described limited ring adopts alloyed steel, Corrosion Resisting Steel or aluminum alloy to make.Described rubber ring adopts teflon, nitrile butadiene rubber, fluorosioloxane rubber, silicone rubber, butyl rubber, fluorine rubber or ethylene propylene rubber fluorine rubber to make.

The high-pressure seal ring of the present utility model that constitutes according to above-mentioned high pressure sealing method is: as shown in Figure 1, this high-pressure seal ring comprises limited ring 1 and rubber ring 2; The interior ring of limited ring 1 is connected with rubber ring 2 mold pressings.As shown in Figure 2, limited ring 1 comprises the confined planes 5 at outer ring surface 3, inner ring surface 4 and two ends; Inner ring surface 4 is a toothed surface.As shown in Figure 3, the beginning of the cross section of rubber ring is the apple shape cross section; The apple shape cross section comprises external tooth form face 6, interior ring arc convex surface 7 and is located at the sealing surface 8 of external tooth form face 6 and interior ring arc convex surface 7 both sides; Be connected through transition arc surface 9 between external tooth form face 6 and the sealing surface 8; The shape of external tooth form face 6 is corresponding with the profile of tooth of the inner ring surface of limited ring 4.As shown in Figure 4, the distance b between the confined planes at described limited ring two ends be between rubber ring two sealing surfaces apart from 0.25～0.6 times of B.

Implementation process of the present utility model and application example

During concrete enforcement, process limited ring 1 earlier, limited ring 1 can select for use alloyed steel, Corrosion Resisting Steel or aluminum alloy to adopt machining or punch process to make.As shown in Figure 1, the cylindrical of limited ring 1 is the light face, the inner ring surface of limited ring can be processed into toothed surface, toothed surface is the junction surface that is connected with the rubber ring mold pressing, it is in order to increase the bonded area of rubber ring and limited ring that the inner ring surface of limited ring is processed into toothed surface, thereby increase the cohesive force of limited ring and rubber ring, prevent that by the profile of tooth connection rubber ring from rotating in limited ring simultaneously, this is one of key of the present utility model.

Process after the limited ring 1, as shown in Figure 1, at inner circular tooth shape face employing mould pressing technology mold pressing one deck rubber formation rubber ring 2 of limited ring 1, the Cross section Design of rubber ring becomes the apple shape cross section; As shown in Figure 3, the apple shape cross section comprises two sealing surfaces, two transition circle cambered surfaces and interior ring arc convex surface; By two sealing surfaces sealing radial pressure; By interior ring arc convex surface sealing axial pressure; Control rubber ring by two transition circle cambered surfaces and inwardly flowed by axial pressure when extruding rubber, prevent that rubber ring from clamp-oning to be connected and lost efficacy, obtain the maximum axial sealing load simultaneously, this is two of a key of the present utility model.

As shown in Figure 4, the distance b between the confined planes at described limited ring two ends be between rubber ring two sealing surfaces apart from 0.25～0.6 of B.Pressure is excessive when preventing the bolt axial pressure damages rubber seal by pressure and causes seal failure, and this is three of a key of the present utility model.

Because the utility model has been taked above-mentioned three key technologies, has improved the high voltage performance of seal ring greatly.Seal ring of the present utility model can bear static sealing pressure 20.6MPa (3000psi); Dynamic seal (packing) pressure 41.3MPa (6000psi); Explosion sealing load 82.6MPa (12000psi).Have good resilience and repeat performance.Have the plastic deformation of the state of anti-high and low pressure the and the strong characteristics of sealing under the vacuum cryogenic.Rubber ring selects for use teflon, nitrile butadiene rubber, fluorosioloxane rubber, silicone rubber, butyl rubber, fluorine rubber or ethylene propylene rubber fluorine rubber to make.Have anti-poison or corrosive gas seal performance.Position during installation is more stable, and assembling can not produce to twist and turn round damage easily, and distortion is rolled, and the anti-performance that chews is good.

Fig. 5 is a bolt and the example that is connected of link, as seen from Figure 5, seal ring of the present utility model is placed between bolt 11 and the link 10, under the axial pressure when connecting, the distortion that is crushed of rubber ring 2 on the seal ring, extend to bolt 11 directions, interior ring arc convex surface 7 on the rubber ring 2 is partly fitted tightly with polished rod on the bolt 11, played the effect of axial seal, simultaneously the plane of the plane of bolt six square toes and link 10 being pressed on the sealing surface 8 on the rubber ring 2 tightly played the effect of radial seal.Simultaneously two confined planes 5 of limited ring have limited the distance between the plane of the plane of bolt six square toes and link 10, can prevent that rubber ring 2 from continuing to be compressed distortion, and build-up of pressure is excessive to be damaged seal ring by pressure and cause seal failure.

Fig. 6 is the example that is connected that bolt adds packing ring and link, as seen from Figure 6, seal ring of the present utility model is placed between packing ring 12 and the link 10, under the axial pressure when connecting, the distortion that is crushed of rubber ring 2 on the seal ring, extend to bolt 11 directions, interior ring arc convex surface 7 on the rubber ring 2 is partly fitted tightly with polished rod on the bolt 11, played the effect of axial seal, simultaneously the plane of the plane of packing ring 12 and link 10 being pressed on the sealing surface 8 on the rubber ring 2 tightly played the effect of radial seal.Simultaneously two confined planes 5 of limited ring have limited the distance between the plane of the plane of packing ring 12 and link 10, can prevent that rubber ring 2 from continuing to be compressed distortion, and build-up of pressure is excessive to be damaged seal ring by pressure and cause seal failure.

Fig. 7 is a rivet and the example that is connected of link, as seen from Figure 7, seal ring of the present utility model is placed between rivet 13 and the link 10, under the axial pressure when connecting, the distortion that is crushed of rubber ring 2 on the seal ring, extend to rivet 13 directions, interior ring arc convex surface 7 on the rubber ring 2 is partly fitted tightly with polished rod on the rivet 13, played the effect of axial seal, simultaneously the plane of the plane of rivet 13 and link 10 being pressed on the sealing surface 8 on the rubber ring 2 tightly played the effect of radial seal.Simultaneously two confined planes 5 of limited ring have limited the distance between the plane of the plane of rivet 13 and link 10, can prevent that rubber ring 2 from continuing to be compressed distortion, and build-up of pressure is excessive to be damaged seal ring by pressure and cause seal failure.

Claims

1. high-pressure seal ring, it is characterized in that: this high-pressure seal ring is connected to form by limited ring (1) and rubber ring (2); The interior ring of limited ring (1) is connected by the profile of tooth mold pressing with rubber ring (2).

2. high-pressure seal ring according to claim 1 is characterized in that: described limited ring (1) comprises the confined planes (5) at outer ring surface (3), inner ring surface (4) and two ends; The inner ring surface (4) of limited ring (1) is a toothed surface.

3. high-pressure seal ring according to claim 1 is characterized in that: the sectional shape of described rubber ring (2) is the apple shape cross section; This apple shape cross section comprises external tooth form face (6), interior ring arc convex surface (7) and is located at external tooth form face (6) and the sealing surface (8) of interior ring arc convex surface (7) both sides; Be connected through transition arc surface (9) between external tooth form face (6) and the sealing surface (8); The shape of external tooth form face (6) is corresponding with the profile of tooth of the inner ring surface (4) of limited ring.

4. according to claim 2 or 3 described high-pressure seal rings, it is characterized in that: the distance b between the confined planes (5) at described limited ring (1) two ends be between rubber ring (2) two sealing surfaces (8) apart from 0.25～0.6 times of B.