CN201265652Y

CN201265652Y - Special-shaped sealing ring for hole

Info

Publication number: CN201265652Y
Application number: CNU2008201885642U
Authority: CN
Inventors: 黄兴; 张红烨; 雷志云; 林成志
Original assignee: Guangzhou Mechanical Engineering Research Institute Co Ltd
Current assignee: Guangzhou Mechanical Engineering Research Institute Co Ltd
Priority date: 2008-08-13
Filing date: 2008-08-13
Publication date: 2009-07-01
Anticipated expiration: 2018-08-13

Abstract

The utility model discloses an irregular hole-sealing ring which comprises an irregular sliding ring and an O-shaped ring, wherein the irregular sliding ring and the O-shaped ring are coaxially placed, the irregular sliding ring is arranged outside the O-shaped ring, the end surface of the inner circle of the irregular sliding ring is provided with a groove, and both edges of the end surface of the outer circle of the irregular sliding ring are oblique outwards and are provided with gaps. The irregular hole-sealing ring has excellent sealing effect under low pressure and high pressure, has the advantages of small leakage rate, high reliability, long service life, convenient installation, and the like and is especially suitable for sealing a metallurgical oil cylinder with a larger diameter.

Description

The hole special-shaped seal ring

Technical field

The utility model relates to the reciprocation sealing spare of metallurgical hydraulic jack, particularly a kind of hole special-shaped seal ring.

Background technique

In recent years, China's steel industry develops growth rapidly, metallurgical oil cylinder is as one of main composition of metallurgical equipment, its quality level plays important effect to the development of Iron And Steel Industry, and as the cylinder seal spare of one of most important element of metallurgical oil cylinder, can its quality state directly determining the function of this oil cylinder realize.

At present the hole is with the structure of seal ring as shown in Figure 1: the rectangle slip ring of making by teflon with provide nitrile butadiene rubber NBR " O " the shape rubber ring of elastic compensating to form, such structure exists deficiency to show: eccentric wear easily takes place in slip ring, nitrile butadiene rubber NBR " O " shape rubber ring is twisted and squeezes bad easily, and leakage rate is bigger than normal.

The model utility content

The utility model is in order to overcome the deficiency that above prior art exists, and the hole special-shaped seal ring that a kind of anti-high low pressure, leakage rate are little, can not produce eccentric wear is provided.

The purpose of this utility model realizes by following technological scheme: this hole special-shaped seal ring, it is characterized in that: comprise special-shaped slip ring and round section joint ring, described special-shaped slip ring and round section joint ring are coaxial placement, the abnormity slip ring is arranged at the round section joint ring outside, the interior nose circle face of abnormity slip ring is provided with groove, and two edges of the cylindrical end face of special-shaped slip ring are outward-dipping and have a breach.

Described special-shaped slip ring is the teflon abnormity slip ring that 40% bronze powder is filled.

Described round section joint ring is " O " shape rubber ring.

Described round section joint ring is compound hydrogenated nitrile-butadiene rubber (HNBR) " O " shape rubber ring.

The sectional shape of described groove is trapezoidal, and depth of groove is less than 3mm.

The angle of the inclined-plane of described groove and the side of special-shaped slip ring is 50～70 °.

The outward-dipping angle in two edges of the cylindrical end face of described special-shaped slip ring is 7～9 °.

The utility model has following advantage with respect to prior art: improve with the structure of the slip ring of seal ring existing hole with special-shaped seal ring in this hole, the abnormity slip ring is the teflon abnormity slip ring that 40% bronze powder is filled, wear-resisting property is good, and friction factor is low; Two edges of cylindrical end face of abnormity slip ring structure outward-dipping and that have a breach has increased the contact stress of special-shaped slip ring when compression, and leakage rate reduces; The groove structure of nose circle face makes the round section joint ring position that mediates in the abnormity slip ring, and special-shaped slip ring can not produce eccentric wear; Round section joint ring is compound hydrogenated nitrile-butadiene rubber HNBR " O " shape rubber ring, has the high temperature high voltage resistant performance, is difficult for producing distortion and damage when pressurized, can provide lasting elasticity, long service life; Compare with seal ring with present hole, " O " shape rubber ring cross-section size increases, and its value added is less than 15%.

This hole all has excellent sealing effect with special-shaped seal ring under low pressure and high pressure, advantage such as have that leakage rate is little, good reliability, life-span are long, easy for installation is specially adapted to the sealing of larger-diameter metallurgical oil cylinder.

Description of drawings

Fig. 1 is the sectional drawing of the hole of prior art with seal ring.

Fig. 2 is the sectional drawing of hole of the present utility model with special-shaped seal ring.

Fig. 3 is the partial enlarged drawing at an edge of cylindrical end face of the special-shaped slip ring of Fig. 2.

Fig. 4 is the partial enlarged drawing of interior nose circle face of the special-shaped slip ring of Fig. 2.

Fig. 5 is the application schematic representation of the hole of Fig. 2 with special-shaped seal ring.

Fig. 6 is the contact stress figure of the special-shaped slip ring of Fig. 5.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

Hole special-shaped seal ring as shown in Figure 2, comprise special-shaped slip ring 1 and round section joint ring 2, abnormity slip ring 1 and round section joint ring 2 are coaxial placement, abnormity slip ring 1 is arranged at round section joint ring 2 outsides, the interior nose circle face of abnormity slip ring 1 is provided with groove 10, the sectional shape of groove 10 is trapezoidal, and groove 10 degree of depth are less than 3mm, and the angle of the inclined-plane of groove 10 and the side of special-shaped slip ring is 62 ° (as shown in Figure 4).Two edges 11 of the cylindrical end face of abnormity slip ring 1 are outward-dipping and have breach 12, and two edges, the 11 outward-dipping angles of the cylindrical end face of special-shaped slip ring 1 are 8 ° (as shown in Figure 3).

Abnormity slip ring 1 is the teflon abnormity slip ring that 40% bronze powder is filled.Round section joint ring 2 is compound hydrogenated nitrile-butadiene rubber HNBR " O " shape rubber ring.

Hole shown in Figure 2 with special-shaped seal ring in the raw, round section joint ring 2 sizes will be complementary with the size of the groove 10 of the interior nose circle face of special-shaped slip ring 1, then can cause special-shaped slip ring 1 to overturn in compression process if round section joint ring 2 is too small.

Fig. 4 is the partial enlarged drawing of interior nose circle face of the special-shaped slip ring of Fig. 2, the angle of the inclined-plane of groove 10 and the side of special-shaped slip ring is 62 °, round section joint ring 2 inclined-plane along groove 10 in compression process is slided, round section joint ring 2 did not have certain clearance with special-shaped slip ring 1 when oil pressure was also high, the special-shaped slip ring 1 in pressurization back compresses with oil cylinder, has avoided the phenomenon of special-shaped slip ring 1 extruding round section joint ring 2.

Fig. 5 is that the hole is applied in the hydraulic jack with special-shaped seal ring, and P is a hydraulic oil, and the direction of arrow is represented the hydraulic oil pressure force direction.

As shown in Figure 6: edge 11 is outward-dipping, and edge 11 is after compressive strain, and the contact stress that special-shaped slip ring 1 is subjected to increases, and this helps special-shaped slip ring 1 frizing in to-and-fro motion, reduces leakage rate, also can provide enough contact stress when low pressure.Abnormity slip ring 1 has breach 12 and avoids compressing back stress and concentrate.Cylinder among Fig. 6 is represented contact stress, and contact stress is two place's peak values, and peak is higher than slip ring shown in Figure 1, and sealing effect is better.

Above-mentioned embodiment is a preferred embodiment of the present utility model; can not limit claim of the present utility model; other any change that does not deviate from the technical solution of the utility model and made or other equivalent substitute mode are included within the protection domain of the present utility model.

Claims

1, hole special-shaped seal ring, it is characterized in that: comprise special-shaped slip ring and round section joint ring, described special-shaped slip ring and round section joint ring are coaxial placement, the abnormity slip ring is arranged at the round section joint ring outside, the interior nose circle face of abnormity slip ring is provided with groove, and two edges of the cylindrical end face of special-shaped slip ring are outward-dipping and have a breach.

2, hole according to claim 1 special-shaped seal ring is characterized in that: described special-shaped slip ring is the teflon abnormity slip ring that 40% bronze powder is filled.

3, hole according to claim 1 special-shaped seal ring, it is characterized in that: described round section joint ring is " O " shape rubber ring.

4, hole according to claim 3 special-shaped seal ring, it is characterized in that: described round section joint ring is compound hydrogenated nitrile-butadiene rubber " O " shape rubber ring.

5, hole according to claim 1 special-shaped seal ring, it is characterized in that: the sectional shape of described groove is trapezoidal, and depth of groove is less than 3mm.

6, hole according to claim 5 special-shaped seal ring, it is characterized in that: the angle of the inclined-plane of described groove and the side of special-shaped slip ring is 50～70 °.

7, hole according to claim 1 special-shaped seal ring, it is characterized in that: the outward-dipping angle in two edges of the cylindrical end face of described special-shaped slip ring is 7～9 °.