CN201539563U - Improved piston rod seal U-shaped ring - Google Patents

Improved piston rod seal U-shaped ring Download PDF

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Publication number
CN201539563U
CN201539563U CN200920218199XU CN200920218199U CN201539563U CN 201539563 U CN201539563 U CN 201539563U CN 200920218199X U CN200920218199X U CN 200920218199XU CN 200920218199 U CN200920218199 U CN 200920218199U CN 201539563 U CN201539563 U CN 201539563U
Authority
CN
China
Prior art keywords
shaped ring
piston rod
type circle
lip
rod seal
Prior art date
Application number
CN200920218199XU
Other languages
Chinese (zh)
Inventor
朱新合
Original Assignee
青岛开世密封工业有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛开世密封工业有限公司 filed Critical 青岛开世密封工业有限公司
Priority to CN200920218199XU priority Critical patent/CN201539563U/en
Application granted granted Critical
Publication of CN201539563U publication Critical patent/CN201539563U/en

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Abstract

The utility model discloses an improved piston rod seal U-shaped ring, so as to enhance the sealing performance of the existing U-shaped ring. The piston rod seal U-shaped ring after improvement clamps an O-shaped ring between an inner lip and an outer lip of the U-shaped ring, thereby leading a product to utilize the O-shaped ring added in the middle of the U-shaped ring to ensure the magnitude of interference of the lips on the two sides to a piston rod under the condition that the pressure of a system is lower, and ensuring the sealing performance of a hydraulic cylinder; and when the pressure of the system is increased, the U-shaped ring is in the trend of opening the inner lip and the outer lip of the U-shaped ring outwards, thereby increasing the magnitude of interference of the product to the piston rod and keeping the sealing capacity.

Description

Improved type rod seal U type circle

Technical field

The utility model relates to a kind of improved type rod seal U type circle.

Background technique

Existing piston rod seal U type circle as shown in Figure 1, yet the suitable pressure ratio of this product is lower, sealability instability, and the gap of getting into cylinder and piston rod when pressure is higher easily causes product failure.

The model utility content

The utility model provides a kind of improved type rod seal U type circle, to strengthen the sealability of existing U type circle.

For reaching above-mentioned purpose, the improved type rod seal U type circle that the utility model provides has pressed from both sides an O type circle between the interior outer lip of described U type circle.The interior outer lip of the rod seal U type circle after the improvement is assemblied on the piston rod with less magnitude of interference, under the lower condition of system pressure, the O type circle that product can utilize U type circle centre to add guarantees the magnitude of interference to piston rod of both sides lip, guarantees the sealability of oil hydraulic cylinder; When system pressure increases, make U type circle make the outside open trend of outer lip in the U type circle, increase the magnitude of interference of product to piston rod, keep sealability.

Further, can also have additional a back-up ring, thereby effectively avoid this U type circle when pressure is higher, to get into the gap of cylinder and piston rod and cause the problem of product failure at the root of described U type circle.

To sum up, the improved type rod seal U type circle that the utility model provides has strengthened sealability than existing U type circle, goes for bigger suitable pressure range and allows bigger suitable gap.

Description of drawings

Fig. 1 is the sectional view of existing piston rod seal U type circle;

The sectional view of the improved type rod seal U type circle that Fig. 2 provides for the utility model.

Specific embodiment

Below in conjunction with Figure of description embodiment of the present utility model is done detailed description.

The utility model provides a kind of improved type rod seal U type circle, as shown in Figure 2, pressed from both sides an O type circle (3) between the inner lip (1) of this U type circle and the outer lip (2), and root has additional a back-up ring (4).Thereby make:

On the one hand, the interior outer lip of the rod seal U type circle after the improvement is assemblied on the piston rod with less magnitude of interference, under the lower condition of system pressure, the O type circle that product can utilize U type circle centre to add guarantees the magnitude of interference to piston rod of both sides lip, guarantees the sealability of oil hydraulic cylinder; When system pressure increases, make U type circle make the outside open trend of outer lip in the U type circle, increase the magnitude of interference of product to piston rod, keep sealability.

On the other hand, being provided with of root back-up ring effectively avoided this U type circle to get into the gap of cylinder and piston rod when pressure is higher and caused the problem of product failure.

In the present embodiment, the rod seal U type circle after the improvement has strengthened sealability than existing U type circle, and goes for bigger suitable pressure range and allow bigger suitable gap, has also increased the shelf life of product simultaneously.

More than; it only is preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; the variation that can expect easily or replacement all should be encompassed within the protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim was defined.

Claims (2)

1. an improved type rod seal U type circle is characterized in that, has pressed from both sides an O type circle between the interior outer lip of described U type circle.
2. improved type rod seal U type circle according to claim 1 is characterized in that the root of described U type circle has additional a back-up ring.
CN200920218199XU 2009-10-20 2009-10-20 Improved piston rod seal U-shaped ring CN201539563U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200920218199XU CN201539563U (en) 2009-10-20 2009-10-20 Improved piston rod seal U-shaped ring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN200920218199XU CN201539563U (en) 2009-10-20 2009-10-20 Improved piston rod seal U-shaped ring

Publications (1)

Publication Number Publication Date
CN201539563U true CN201539563U (en) 2010-08-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN200920218199XU CN201539563U (en) 2009-10-20 2009-10-20 Improved piston rod seal U-shaped ring

Country Status (1)

Country Link
CN (1) CN201539563U (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102954218A (en) * 2011-08-26 2013-03-06 优泰科(苏州)密封技术有限公司 Piston rod sealing part
CN102967533A (en) * 2012-09-12 2013-03-13 中北大学 High pressure seal test device for measuring daub cushioning performance
CN103016579A (en) * 2012-12-31 2013-04-03 焦作市大华能源机械有限公司 Combined sealing plate type brake for hydraulic cylinder
CN103742645A (en) * 2013-12-20 2014-04-23 广西南宁德通网络有限公司 Assembly-type seal ring
CN105673860A (en) * 2015-11-28 2016-06-15 江门市格雷亚特流体密封技术有限公司 RUP type U-shaped ring for piston rod
CN107642684A (en) * 2017-09-19 2018-01-30 常州常工电子科技股份有限公司 A kind of intelligence visits leakage device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102954218A (en) * 2011-08-26 2013-03-06 优泰科(苏州)密封技术有限公司 Piston rod sealing part
CN102967533A (en) * 2012-09-12 2013-03-13 中北大学 High pressure seal test device for measuring daub cushioning performance
CN103016579A (en) * 2012-12-31 2013-04-03 焦作市大华能源机械有限公司 Combined sealing plate type brake for hydraulic cylinder
CN103742645A (en) * 2013-12-20 2014-04-23 广西南宁德通网络有限公司 Assembly-type seal ring
CN105673860A (en) * 2015-11-28 2016-06-15 江门市格雷亚特流体密封技术有限公司 RUP type U-shaped ring for piston rod
CN107642684A (en) * 2017-09-19 2018-01-30 常州常工电子科技股份有限公司 A kind of intelligence visits leakage device

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20100804

Termination date: 20121020