CN204716967U - Seal ring and hydraulic elongator sealing configuration - Google Patents

Seal ring and hydraulic elongator sealing configuration Download PDF

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Publication number
CN204716967U
CN204716967U CN201520300331.7U CN201520300331U CN204716967U CN 204716967 U CN204716967 U CN 204716967U CN 201520300331 U CN201520300331 U CN 201520300331U CN 204716967 U CN204716967 U CN 204716967U
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China
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seal ring
side waist
ring
section
outer side
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CN201520300331.7U
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袁自荣
朱大庆
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Sichuan Construction Machinery Group Co Ltd
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Sichuan Construction Machinery Group Co Ltd
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  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

The utility model discloses a kind of seal ring and hydraulic elongator sealing configuration, solve the problem that existing seal ring sealing effect is bad.Seal ring, seal ring arbitrary cross section is the trapezoid shaped of equivalent size, trapezoidally comprise long base, short base, inner side waist, outer side waist, long base is provided with the recessed o-ring groove to direction, short base, inner side waist, the outer side waist of seal ring cross section are fitted with seal clearance respectively, strengthen sealability.Hydraulic elongator sealing configuration, the piston comprising cylinder body and insert in described cylinder body, piston head arranges the pistion recess of ring-type, arranges the utility model seal ring in pistion recess, and the inner side waist of seal ring, outer side waist all contact with cylinder body.Hydraulic elongator sealing configuration realizes the sealing of both sides inside and outside piston simultaneously, without the need to arranged outside sealed groove in piston, does not also need back-up ring, and processing and fabricating is more succinct, it is more convenient to install and use; Under the hyperpressure of 70 ~ 80MPa, use good seal, and higher pressure can be adapted to.

Description

Seal ring and hydraulic elongator sealing configuration
Technical field
The utility model relates to a kind of seal ring, and a kind of hydraulic elongator sealing configuration comprising sealing circle.
Background technique
Hydraulic elongator comprises cylinder body and piston, have sealing configuration between cylinder body and piston, existing sealing configuration arranges sealed groove respectively inside and outside piston, arranges O RunddichtringO in sealed groove, O RunddichtringO both sides in sealed groove also arrange back-up ring, as shown in Figure 1.
Above-mentioned O RunddichtringO adds retaining ring sealing structure and has following deficiency: hydraulic pressure is when 70 ~ 80MPa, the cylinder body of hydraulic elongator produces larger distortion, causes the increasing of seal clearance, because O RunddichtringO decrement is little, the seal clearance of close increase can not be compensated, thus cause leaking.On the other hand, limit by hydraulic elongator physical dimension, the diameter of section of O RunddichtringO can not be too large, and diameter of section is larger, and on piston, corresponding sealed groove is more wide darker, can affect the intensity of piston; On the contrary, the diameter of section of O RunddichtringO is too little, and O RunddichtringO is easily clamp-oned seal clearance by hydraulic pressure, thus causes the inefficacy of O RunddichtringO.
Model utility content
First technical problem to be solved in the utility model is to provide a kind of seal ring, solves the problem that existing seal ring sealing effect is bad.
The utility model solves the technological scheme that its technical problem adopts: seal ring, seal ring arbitrary cross section is the trapezoid shaped of equivalent size, describedly trapezoidally comprise long base, short base, inner side waist, outer side waist, described long base is provided with the recessed o-ring groove to direction, short base.
Further: the material of described seal ring is nitrile butadiene rubber.
Further: the arbitrary cross section of described seal ring is isosceles trapezoid shape.
Further: the acute angle on described inner side waist, outer side waist and short base is 77 °.
Further: on the arbitrary cross section of described seal ring, the Extreme breadth of described o-ring groove on direction, place, long base is equal with the length on long base.
Further: on the arbitrary cross section of described seal ring, described o-ring groove all has straightway near inner side waist and outer side waist, and is greater than near the straightway of inner side waist and the acute angle on short base near the straightway of outer side waist and the acute angle on short base.
Further: on the arbitrary cross section of described seal ring, described o-ring groove is seamlessly transitted by circular arc between outer side waist straightway near inner side waist straightway and o-ring groove.
Further: on the arbitrary cross section of described seal ring, the degree of depth of described o-ring groove is the half of the trapezoidal height of seal ring arbitrary cross section.
The utility model also provides a kind of hydraulic elongator sealing configuration, solves the existing hydraulic elongator sealing configuration problem that sealing effect is bad when hydraulic pressure increases.
The utility model solves the technological scheme that above-mentioned second technical problem adopts: hydraulic elongator sealing configuration, the piston comprising cylinder body and insert in described cylinder body, described piston head arranges the pistion recess of ring-type, any one seal ring above-mentioned is set in pistion recess, and the inner side waist of described seal ring, outer side waist all contact with cylinder body.
Further, described pistion recess is the equal trapezoid shaped of size at arbitrary cross section, and the degree of depth of pistion recess is less than the trapezoidal height of arbitrary cross section of described seal ring.
Inner side waist, the outer side waist of the cross section of seal ring described in the utility model can be fitted with needing the gap sealed well, strengthen sealability.Hydraulic elongator sealing configuration with sealing circle has the following advantages:
The first, the utility model seal ring is larger compared to the cross-sectional dimension of common O RunddichtringO, decrement is large, can compensate the seal clearance produced because of high pressure distortion, and Sealing can be avoided to be squeezed into seal clearance, avoid occurring seal failure problem, improve sealability.
The second, common O RunddichtringO can only seal a face, and the utility model seal ring can simultaneously two faces contacting with cylinder body of packed-piston, decrease the usage quantity of seal ring, and without the need to back-up ring, it are more convenient to install.
Three, without the need to outer side surface in piston offers sealed groove, avoid damage piston and the intensity of piston is impacted, the working life of piston can be improved.
4th, hydraulic pressure acts on the o-ring groove of seal ring, seal ring overlays in piston head by vertical component, the outer side waist of seal ring, inner side waist are fitted in the gap location between cylinder body and piston by horizontally outward, inside component respectively, hydraulic pressure is larger, and the pressure that seal ring is subject to is larger, fits tighter, so hydraulic elongator sealing configuration of the present utility model uses good seal under the hyperpressure of 70 ~ 80MPa, and higher pressure requirements can be adapted to.
Accompanying drawing explanation
Fig. 1 is existing hydraulic elongator sealed structural representation;
Fig. 2 is the utility model hydraulic elongator sealed structural representation;
Fig. 3 is the schematic cross-section of the utility model seal ring.
Component, position and numbering in figure: piston 1, cylinder body 2, O RunddichtringO 3, back-up ring 4, seal ring 5, long base 51, short base 52, inner side waist 53, outer side waist 54, o-ring groove 55.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Figure 3 shows that the cross sectional representation of the utility model seal ring, seal ring 5 is overall in the form of a ring, also can be arranged to other shapes such as ellipse, rectangle as required.The material of seal ring 5 is rubber, preferably adopts nitrile butadiene rubber.The shape and size of the arbitrary cross section of seal ring 5 are identical trapezoidal, described trapezoidal i.e. cross section is trapezoidal, comprise long base 51, short base 52, inner side waist 53, outer side waist 54, the trapezoidal preferred employing isosceles trapezoid in cross section, long base 51 is provided with the recessed o-ring groove 55 to direction, short base 52.
Described o-ring groove 55 can be U-shaped groove, v-depression on cross section, the symmetrical or asymmetric setting of the dual-side of o-ring groove 55 on cross section.On the arbitrary cross section of described seal ring 5, the Extreme breadth of o-ring groove 55 on direction, place, long base 51 is equal with the length on long base 51, namely the inner side edge of o-ring groove 55, outer side are crossing with inner side waist 53, outer side waist 54 respectively, and intersection point is the end points on long base 51.On the arbitrary cross section of described seal ring 5, described o-ring groove 55 all has straightway near inner side waist 53 and outer side waist 54, and is greater than near the straightway of inner side waist 53 and the acute angle on short base 52 near the straightway of outer side waist 54 and the acute angle on short base 52.
As shown in Fig. 3 right side, o-ring groove 55 comprises inner side edge straightway AB, outer side straightway CD, is the circular arc section of seamlessly transitting between BC, and straightway AD is long base simultaneously.The acute angle of straight line AB and long base AD is less than the acute angle of straight line CD and long base AD.Arc section BC is tangential on B, C 2 point respectively with straight line AB, straight line CD.The degree of depth of o-ring groove 55 is the half of the trapezoidal height of cross section.
In the form of a ring, the internal diameter of seal ring 5 is 75.5mm to seal ring 5, and external diameter is 123.5mm, and the trapezoidal height in cross section is 19.5mm, and the trapezoidal inner side waist 53 in cross section, outer side waist 54 are 77 ° with the acute angle on short base 52.
Inner side waist 53, the outer side waist 54 of seal ring 5 cross section can be fitted with Sealing well, better compared to common O RunddichtringO sealability.
The utility model also provides a kind of hydraulic elongator sealing configuration, as shown in Figure 2, the piston 1 that hydraulic elongator sealing configuration comprises cylinder body 2 and inserts in described cylinder body 2, described piston 1 top arranges the pistion recess of ring-type, on the cross section of piston 1, pistion recess is trapezoid shaped, arranges any one seal ring 5 above-mentioned in pistion recess, and the degree of depth (i.e. the trapezoidal height in pistion recess cross section) of pistion recess is less than the trapezoidal height of the cross section of described seal ring 5.When seal ring 5 is mounted in pistion recess, inner side waist 53, the outer side waist 54 of seal ring 5 contact with cylinder body 2 all naturally, ensure sealing effect.
Seal ring 5 is larger compared to the cross-sectional dimension of common O RunddichtringO 5, can compensate the seal clearance of high pressure distortion and generation, and can not be squeezed into seal clearance, avoid occurring seal failure, seal ring 5 realizes the sealing of both sides inside and outside piston simultaneously, and without the need to arranged outside sealed groove in piston, does not also need back-up ring, and processing and fabricating is more succinct, it is more convenient to install and use, life cycle is improved, in addition, the above-mentioned certain structural features of seal ring, can ensure to act on the o-ring groove 55 of seal ring 5 at hydraulic pressure, seal ring 5 overlays in piston 1 top by vertical component, level left, component is to the right respectively by the inner side waist 53 of seal ring 5, outer side waist 54 fits in the gap location between cylinder body 2 and piston 1, ensure sealing effect, hydraulic pressure is larger, the pressure that seal ring 5 is subject to is larger, fit tighter, so hydraulic elongator sealing configuration of the present utility model uses good seal under the hyperpressure of 70 ~ 80MPa, and higher pressure can be adapted to.

Claims (10)

1. seal ring, it is characterized in that: seal ring (5) arbitrary cross section is the trapezoid shaped of equivalent size, describedly trapezoidally comprise long base (51), short base (52), inner side waist (53), outer side waist (54), described long base (51) is provided with the recessed o-ring groove (55) to short base (52) direction.
2. seal ring as claimed in claim 1, is characterized in that: the material of described seal ring (5) is nitrile butadiene rubber.
3. seal ring as claimed in claim 1, is characterized in that: the arbitrary cross section of described seal ring (5) is isosceles trapezoid shape.
4. seal ring as claimed in claim 1, is characterized in that: described inner side waist (53), outer side waist (54) are 77 ° with the acute angle on short base (52).
5. seal ring as claimed in claim 1, it is characterized in that: on the arbitrary cross section of described seal ring (5), the Extreme breadth of described o-ring groove (55) on long base (51) direction, place is equal with the length of long base (51).
6. seal ring as claimed in claim 1, it is characterized in that: on the arbitrary cross section of described seal ring (5), described o-ring groove (55) all has straightway near inner side waist (53) and outer side waist (54), and is greater than near the straightway of inner side waist (53) and the acute angle of short base (52) near the straightway of outer side waist (54) and the acute angle of short base (52).
7. seal ring as claimed in claim 6, it is characterized in that: on the arbitrary cross section of described seal ring (5), described o-ring groove (55) is seamlessly transitted by circular arc between outer side waist (54) straightway near inner side waist (53) straightway and o-ring groove (55).
8. seal ring as claimed in claim 1, is characterized in that: on the arbitrary cross section of described seal ring (5), and the degree of depth of described o-ring groove (55) is the half of the trapezoidal height of seal ring (5) arbitrary cross section.
9. hydraulic elongator sealing configuration, the piston (1) comprising cylinder body (2) and insert in described cylinder body (2), it is characterized in that: described piston (1) top arranges the pistion recess of ring-type, seal ring described in the arbitrary claim of the claims 1 to 8 is set in pistion recess, and the inner side waist (53) of described seal ring (5), outer side waist (54) all contact with cylinder body (2).
10. hydraulic elongator sealing configuration as claimed in claim 9, it is characterized in that: described pistion recess is the equal trapezoid shaped of size at arbitrary cross section, and the degree of depth of pistion recess is less than the trapezoidal height of the arbitrary cross section of described seal ring (5).
CN201520300331.7U 2015-05-11 2015-05-11 Seal ring and hydraulic elongator sealing configuration Active CN204716967U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520300331.7U CN204716967U (en) 2015-05-11 2015-05-11 Seal ring and hydraulic elongator sealing configuration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520300331.7U CN204716967U (en) 2015-05-11 2015-05-11 Seal ring and hydraulic elongator sealing configuration

Publications (1)

Publication Number Publication Date
CN204716967U true CN204716967U (en) 2015-10-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201520300331.7U Active CN204716967U (en) 2015-05-11 2015-05-11 Seal ring and hydraulic elongator sealing configuration

Country Status (1)

Country Link
CN (1) CN204716967U (en)

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