CN201627919U - Sealing device for hydraulic cylinder - Google Patents

Sealing device for hydraulic cylinder Download PDF

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Publication number
CN201627919U
CN201627919U CN2009202740630U CN200920274063U CN201627919U CN 201627919 U CN201627919 U CN 201627919U CN 2009202740630 U CN2009202740630 U CN 2009202740630U CN 200920274063 U CN200920274063 U CN 200920274063U CN 201627919 U CN201627919 U CN 201627919U
Authority
CN
China
Prior art keywords
ring
cylinder
piston
seal
lid
Prior art date
Application number
CN2009202740630U
Other languages
Chinese (zh)
Inventor
陈兆红
Original Assignee
陈兆红
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 陈兆红 filed Critical 陈兆红
Priority to CN2009202740630U priority Critical patent/CN201627919U/en
Application granted granted Critical
Publication of CN201627919U publication Critical patent/CN201627919U/en

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Abstract

The utility model discloses a sealing device for a hydraulic cylinder, which is characterized in that an upper end and a lower end of a piston are respectively provided with an upper step and a lower step; the upper and lower steps are respectively provided with an upper piston sealing ring and a lower piston sealing ring; the upper part of the upper piston sealing ring is provided with an upper piston sealing ring pressing-ring; the lower part of the lower piston sealing ring is provided with a lower piston sealing ring pressing-ring; an upper piston collar is arranged on the hydraulic rod in the upper part of the upper piston sealing ring pressing-ring; a lower piston collar is arranged on the hydraulic rod in the lower part of the lower piston sealing ring pressing-ring. The sealing device for the hydraulic cylinder has the advantages: the device is keep from leaking for a long time and has long service life; the device is provided with an elastic sealing ring, in which a gas bag is arranged, and has faster air recovery and better elasticity; the sealing ferrule to a certain degree ensures the uniform deformation of the sealing ring when extruded, thereby playing a better role in sealing.

Description

A kind of seal arrangement of oil hydraulic cylinder

Technical field

The utility model relates to a kind of seal arrangement of oil hydraulic cylinder.

Background technique

During hydraulic cylinder works, piston is back and forth movement in oil hydraulic cylinder, hydraulic pressure can be converted into mechanical energy, but oil hydraulic cylinder of the prior art, owing to have back pressure in the cylinder, technology such as sealing difference cause oil hydraulic cylinder to have leakage problem, its internal leakage will cause the decrease in efficiency of cylinder, creep, grind phenomenons such as wound, its external leakage will bring environmental pollution, cause technical problems such as hidden danger, and domestic Sealing mostly is the rubber of different shape or the seal ring of polyurethane material, its sealing mechanism is all the same basically, leakage problems exists always, and external building rubber compound seal ring is because superior materials, require auxiliary equipment machining accuracy height, embody certain superiority on working life, but do not break through on the sealing mechanism, sealing effect is not very good yet, and cost an arm and a leg, be very restricted in the described use.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of can effectively preventing and leaks the seal arrangement of a kind of oil hydraulic cylinder of long service life.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: a kind of seal arrangement of oil hydraulic cylinder, comprise cylinder body, the cylinder body lid, hydraulic rod, piston, the hydraulic pressure oilhole, the end of described hydraulic rod in described cylinder body is provided with described piston, it is characterized in that described piston is respectively arranged with step in two ends up and down, be respectively arranged with upper piston seal circle and lower piston seal ring on the described step, described upper piston seal circle and described lower piston seal ring are the air bag circle of sealing, the top of described upper piston seal circle is provided with upper piston seal circle trim ring, the below of described lower piston seal ring is provided with lower piston seal ring trim ring, the described hydraulic rod in top of described upper piston seal circle trim ring is provided with positioning ring, the described hydraulic rod in below of described lower piston seal ring trim ring is provided with down positioning ring, described piston and described piston positioning ring and described hydraulic rod are by being threaded, the top of described upper piston seal circle trim ring on being provided with on the described hydraulic rod positioning ring external diameter less than the external diameter of described upper piston seal circle trim ring, greater than its internal diameter, the following positioning ring external diameter that the below of described lower piston seal ring trim ring is provided with on described hydraulic rod is less than the external diameter of described lower piston seal ring trim ring, greater than its internal diameter, described upward seal ring trim ring and described going up between the positioning ring have the space, between described lower seal trim ring and the described following positioning ring space is arranged, described cylinder body two ends up and down is respectively arranged with upper cylinder body lid and lower cylinder body lid, the junction of described cylinder body and cylinder body lid is provided with seal ring, described hydraulic rod passes described lower cylinder body lid, the junction that described lower cylinder body covers in cylinder body with hydraulic rod is provided with a cavity, described cavity place is provided with cylinder body lid seal ring, described cylinder body lid seal ring top is provided with cylinder body lid seal ring trim ring, described cylinder body lid seal ring trim ring top is provided with cylinder body lid positioning ring, described cylinder body lid positioning ring and described cylinder body are by being threaded, the inner diameter of described cylinder body lid positioning ring is greater than the inner diameter of described cylinder body lid seal ring trim ring, less than its external diameter, between described cylinder body lid positioning ring and the described cylinder body lid seal ring trim ring space is arranged, described seal ring is set to elastic material, and described elastic material is polyurethane material or rubber material.

Compared with prior art, the utility model has the advantages that to keep long-time ne-leakage, long service life, the flexible seal ring of design in the device, and inside is air bag, and air restored is faster, and elasticity is better; The sealing trim ring has guaranteed that to a certain extent seal ring is out of shape evenly, plays better seal action in extrusion process; The diameter of positioning ring greater than its inner diameter, can play the effect of restriction sealing trim ring position less than the outer diameter of sealing trim ring in the piston up-down process; Between positioning ring and the sealing trim ring space is arranged, can make the seal ring deformation extent bigger; And hydraulic rod and hydraulic pressure lid junction also are provided with elastic seal ring, have effectively placed leaking outside of hydraulic oil, the protection environment; Whole device is dismantled easily, and is rational in infrastructure, and cost is lower, practical.

Description of drawings

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

The title of above accompanying drawing and sequence number: 1, cylinder body, 2, cylinder body lid, 3, hydraulic rod, 4, piston, 5, the hydraulic pressure oilhole, 6, the upper piston seal circle, 7, lower piston seal ring, 8, upper piston seal circle trim ring, 9, lower piston seal ring trim ring, 10, upper piston positioning ring, 11, the lower piston positioning ring, 12, the upper cylinder body lid, 13, lower cylinder body lid, 14, cylinder body lid seal ring, 15, cylinder body lid seal ring trim ring, 16, cylinder body lid positioning ring.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

As shown in the figure: a kind of seal arrangement of oil hydraulic cylinder, comprise cylinder body 1, cylinder body lid 2, hydraulic rod 3, piston 4, hydraulic pressure oilhole 5, upper cylinder body lid 12 is fixing by seal ring and cylinder body 1 with lower cylinder body lid 13, during work, when hydraulic rod 3 up moves, upper piston seal circle trim ring 8 is subjected to the extruding force of hydraulic oil, upper piston seal circle 6 is produced squeezing action, upper piston seal circle 6 is laterally pushed modification, play good seal action, lower piston positioning ring 11 can block lower piston seal ring trim ring 9 simultaneously, and it can not glided significantly; When hydraulic rod 3 down moves, lower piston seal ring trim ring 9 is subjected to the extruding force of hydraulic oil, lower piston seal ring 7 is produced squeezing action, lower piston seal ring 7 is laterally pushed modification, play good seal action, upper piston positioning ring 10 can block upper piston seal circle trim ring 8 simultaneously, and it can not glided significantly; Cylinder body lid trim ring 15 is subjected to the hydraulic oil extruding, and cylinder body lid seal ring 14 is produced downforce, and seal action is played in 14 lateral spreads of cylinder body lid seal ring, prevents that hydraulic oil from leaking outside.

Claims (10)

1. the seal arrangement of an oil hydraulic cylinder, comprise cylinder body, the cylinder body lid, hydraulic rod, piston, the hydraulic pressure oilhole, the end of described hydraulic rod in described cylinder body is provided with described piston, it is characterized in that described piston is respectively arranged with step in two ends up and down, be respectively arranged with upper piston seal circle and lower piston seal ring on the described step, the top of described upper piston seal circle is provided with upper piston seal circle trim ring, the below of described lower piston seal ring is provided with lower piston seal ring trim ring, the described hydraulic rod in top of described upper piston seal circle trim ring is provided with positioning ring, the described hydraulic rod in below of described lower piston seal ring trim ring is provided with down positioning ring, described cylinder body two ends up and down is respectively arranged with upper cylinder body lid and lower cylinder body lid, described hydraulic rod passes described lower cylinder body lid, the junction that described lower cylinder body covers in cylinder body with hydraulic rod is provided with a cavity, described cavity place is provided with cylinder body lid seal ring, described cylinder body lid seal ring top is provided with cylinder body lid seal ring trim ring, and described cylinder body lid seal ring trim ring top is provided with positioning ring.
2. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1, the top that it is characterized in that described upper piston seal circle trim ring on being provided with on the described hydraulic rod positioning ring external diameter less than the external diameter of described upper piston seal circle trim ring, greater than its internal diameter, the following positioning ring external diameter that the below of described lower piston seal ring trim ring is provided with on described hydraulic rod is less than the external diameter of described lower piston seal ring trim ring, greater than its internal diameter.
3. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described last seal ring trim ring and described going up between the positioning ring have the space, between described lower seal trim ring and the described following positioning ring space is arranged.
4. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that the inner diameter of the inner diameter of described cylinder body lid positioning ring greater than described cylinder body lid seal ring trim ring, less than its external diameter.
5. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that between described cylinder body lid positioning ring and the described cylinder body lid seal ring trim ring space being arranged.
6. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described piston and described piston positioning ring and described hydraulic rod by being threaded, and described cylinder body lid positioning ring and described cylinder body are by being threaded.
7. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that the junction of described cylinder body and cylinder body lid is provided with seal ring.
8. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described upper piston seal circle and the described lower piston seal ring air bag circle for sealing.
9. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described seal ring is set to elastic material, and described elastic material is a polyurethane material.
10. the seal arrangement of a kind of oil hydraulic cylinder as claimed in claim 1 is characterized in that described seal ring is set to elastic material, and described elastic material is a rubber material.
CN2009202740630U 2009-11-27 2009-11-27 Sealing device for hydraulic cylinder CN201627919U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202740630U CN201627919U (en) 2009-11-27 2009-11-27 Sealing device for hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202740630U CN201627919U (en) 2009-11-27 2009-11-27 Sealing device for hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN201627919U true CN201627919U (en) 2010-11-10

Family

ID=43059311

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009202740630U CN201627919U (en) 2009-11-27 2009-11-27 Sealing device for hydraulic cylinder

Country Status (1)

Country Link
CN (1) CN201627919U (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102785843A (en) * 2012-08-10 2012-11-21 王金宁 Vacuum energy-saving universal grape wine brewing storage bucket
GB2494677A (en) * 2011-09-15 2013-03-20 Agilent Technologies Inc A high tightness piston seal filled with low compressibility material
CN102997642A (en) * 2012-10-30 2013-03-27 无锡鸿声铝业有限公司 Sealing board of reinforcing structure
CN102997645A (en) * 2012-10-30 2013-03-27 无锡鸿声铝业有限公司 Seal plate fixing structure
CN103322201A (en) * 2013-06-18 2013-09-25 苏州市吴中区欣鑫开关配件厂 Piston sealing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2494677B (en) * 2011-09-15 2018-07-11 Agilent Technologies Inc High tightness piston seal filled with low compressibility material
GB2494677A (en) * 2011-09-15 2013-03-20 Agilent Technologies Inc A high tightness piston seal filled with low compressibility material
CN102785843A (en) * 2012-08-10 2012-11-21 王金宁 Vacuum energy-saving universal grape wine brewing storage bucket
CN102997642A (en) * 2012-10-30 2013-03-27 无锡鸿声铝业有限公司 Sealing board of reinforcing structure
CN102997645A (en) * 2012-10-30 2013-03-27 无锡鸿声铝业有限公司 Seal plate fixing structure
CN102997645B (en) * 2012-10-30 2015-08-05 无锡鸿声铝业有限公司 A kind of sealing plate fixed structure
CN103322201A (en) * 2013-06-18 2013-09-25 苏州市吴中区欣鑫开关配件厂 Piston sealing device

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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: 20101110

Termination date: 20101127