CN105221512B - A kind of hydraulic cylinder new type sealing device - Google Patents
A kind of hydraulic cylinder new type sealing device Download PDFInfo
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- CN105221512B CN105221512B CN201510709206.6A CN201510709206A CN105221512B CN 105221512 B CN105221512 B CN 105221512B CN 201510709206 A CN201510709206 A CN 201510709206A CN 105221512 B CN105221512 B CN 105221512B
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- 238000007789 sealing Methods 0.000 title claims abstract description 120
- 230000007704 transition Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims 3
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
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Abstract
一种液压缸新型密封装置，包括缸体、活塞杆、密封件和挡圈，还包括唇形密封圈结构，所述唇形密封圈结构由环形密封槽和唇形密封圈组成，所述环形密封槽竖截面为矩形，底部带有环形凸台，所述唇形密封圈的竖截面为直角梯形结构，在直角梯形的直角腰和下底边上分别设有环形凹槽，所述唇形密封圈下底边上的环形凹槽和环形密封槽的环形凸台配合，所述直角梯形的直角腰和环形密封槽的上侧壁配合，所述直角梯形上底边和活塞杆配合。唇形密封圈比一边密封圈有更好密封效果；梯形密封圈不仅能达到密封效果，还对唇形密封圈产生挤压作用，进一步增加密封性能；防尘密封圈使用密封圈寿命更长；该密封装置安装便捷，结构紧凑、合理。
A new sealing device for a hydraulic cylinder, including a cylinder body, a piston rod, a seal and a retaining ring, and also includes a lip seal ring structure, the lip seal ring structure is composed of an annular seal groove and a lip seal ring, the ring The vertical section of the sealing groove is rectangular, with an annular boss at the bottom. The vertical section of the lip seal ring is a right-angled trapezoidal structure, and annular grooves are respectively arranged on the right-angled waist and lower bottom of the right-angled trapezoid. The annular groove on the lower base of the sealing ring cooperates with the annular boss of the annular sealing groove, the right-angled waist of the right-angled trapezoid cooperates with the upper side wall of the annular sealing groove, and the upper bottom of the right-angled trapezoid cooperates with the piston rod. The lip seal ring has a better sealing effect than one side seal ring; the trapezoidal seal ring can not only achieve the sealing effect, but also squeeze the lip seal ring to further increase the sealing performance; the dust-proof seal ring has a longer service life of the seal ring; The sealing device is easy to install, compact and reasonable in structure.
Description
技术领域technical field
本发明创造涉及一种液压缸新型密封装置，属于密封技术领域。The invention relates to a novel sealing device for a hydraulic cylinder, which belongs to the technical field of sealing.
背景技术Background technique
液压缸运用在折弯机或剪切机工作上 ，都会影响其工作精度的问题。现有的液压缸密封一直沿用多种类的橡胶密封圈，靠胶圈自身弹性达到密封效果，而此种密封的缺点是耐磨性差，并易老化变形，从而其密封性能差，使用寿命低。由于考虑到工作压力比较大和活塞杆经常往返运动，在设计、安装密封装置时，可以避免使用传统的密封圈，改进其密封效果。The use of hydraulic cylinders in the work of bending machines or shearing machines will affect their working accuracy. Existing hydraulic cylinder seals have been using various types of rubber sealing rings, relying on the elasticity of the rubber rings to achieve the sealing effect, but the disadvantages of this type of sealing are poor wear resistance and easy aging deformation, resulting in poor sealing performance and low service life. Considering the relatively high working pressure and the frequent reciprocating movement of the piston rod, when designing and installing the sealing device, the traditional sealing ring can be avoided to improve its sealing effect.
发明内容Contents of the invention
针对现有技术的不足，本发明创造的目的是提供一种液压缸新型密封装置，不仅设计新颖、结构合理，使用、安装方便、性能安全可靠，而且能有效地提高和保持液压缸的密封性能。Aiming at the deficiencies of the prior art, the purpose of this invention is to provide a new sealing device for hydraulic cylinders, which not only has novel design, reasonable structure, convenient use and installation, safe and reliable performance, but also can effectively improve and maintain the sealing performance of hydraulic cylinders .
为实现上述目的，本发明创造是通过以下技术手段来实现的：To achieve the above object, the invention is achieved by the following technical means:
一种液压缸新型密封装置，包括缸体、活塞杆、密封件和挡圈，其特征在于：还包括唇形密封圈结构，所述唇形密封圈结构由环形密封槽和唇形密封圈组成，所述环形密封槽竖截面为矩形，底部带有环形凸台，所述唇形密封圈的竖截面为直角梯形结构，在直角梯形的直角腰和下底边上分别设有环形凹槽，所述唇形密封圈下底边上的环形凹槽和环形密封槽的环形凸台配合，所述直角梯形的直角腰和环形密封槽的上侧壁配合，所述直角梯形上底边和活塞杆配合。A new sealing device for a hydraulic cylinder, comprising a cylinder body, a piston rod, a seal and a retaining ring, characterized in that it also includes a lip seal ring structure, and the lip seal ring structure is composed of an annular seal groove and a lip seal ring , the vertical section of the annular sealing groove is rectangular, with an annular boss at the bottom, the vertical section of the lip sealing ring is a right-angled trapezoidal structure, and annular grooves are respectively provided on the right-angled waist and lower bottom of the right-angled trapezoid, The annular groove on the bottom edge of the lip-shaped sealing ring cooperates with the annular boss of the annular sealing groove, the right-angled waist of the right-angled trapezoid cooperates with the upper side wall of the annular sealing groove, and the upper bottom edge of the right-angled trapezoid matches the piston rod fit.
进一步地：further:
在所述环形密封槽内还设有梯形密封圈，所述梯形密封圈的竖截面为直角梯形结构，所述直角梯形结构的直角腰和环形密封槽下侧壁配合，所述直角梯形结构的斜角腰和所述唇形密封圈的斜角腰配合。A trapezoidal sealing ring is also provided in the annular sealing groove. The vertical section of the trapezoidal sealing ring is a right-angled trapezoidal structure. The right-angled waist of the right-angled trapezoidal structure cooperates with the lower side wall of the annular sealing groove. The beveled waist cooperates with the beveled waist of the lip seal ring.
所述梯形密封圈和所述环形密封槽采用过渡配合。The trapezoidal sealing ring and the annular sealing groove adopt a transition fit.
所述唇形密封圈下底边上的环形凹槽的侧壁和底壁之间设有倒角。A chamfer is provided between the side wall and the bottom wall of the annular groove on the bottom edge of the lip seal ring.
在所述缸体和活塞杆之间还设有防尘密封结构，沿活塞杆伸出缸体方向上依次排列为密封件和挡圈、唇形密封结构、防尘密封结构。A dust-proof sealing structure is also provided between the cylinder body and the piston rod, which are arranged in sequence along the direction in which the piston rod extends out of the cylinder body into a seal, a back-up ring, a lip-shaped sealing structure, and a dust-proof sealing structure.
所述防尘密封结构设置在活塞杆伸出缸体端口处。The dust-proof sealing structure is arranged at the port where the piston rod extends out of the cylinder body.
所述防尘密封结构由环形防尘密封槽和防尘密封圈组成，所述环形防尘密封槽底部设有环形凸台，所述防尘密封圈上表面和外侧面分别设有环形凹槽，所述防尘密封圈外侧面的环形凹槽与环形防尘密封槽底部的环形凸台配合，所述防尘密封圈上表面和环形防尘密封槽上侧壁配合。The dust-proof sealing structure is composed of an annular dust-proof sealing groove and a dust-proof sealing ring, the bottom of the annular dust-proof sealing groove is provided with an annular boss, and the upper surface and the outer surface of the dust-proof sealing ring are respectively provided with annular grooves , the annular groove on the outer surface of the dust-proof sealing ring cooperates with the annular boss at the bottom of the annular dust-proof sealing groove, and the upper surface of the dust-proof sealing ring cooperates with the upper side wall of the annular dust-proof sealing groove.
所述防尘密封圈和活塞杆配合的内侧面设有向内凹陷的圆弧。The inner surface where the dust-proof sealing ring cooperates with the piston rod is provided with an inwardly concave arc.
本发明创造的有益效果是：唇形密封圈比一边密封圈有更好密封效果；梯形密封圈不仅能达到密封效果，还对唇形密封圈产生挤压作用，进一步增加密封性能；防尘密封圈使用密封圈寿命更长；该密封装置安装便捷，结构紧凑、合理。The beneficial effects created by the invention are: the lip-shaped sealing ring has a better sealing effect than one side sealing ring; the trapezoidal sealing ring can not only achieve the sealing effect, but also squeeze the lip-shaped sealing ring to further increase the sealing performance; The service life of the sealing ring is longer; the sealing device is easy to install, and the structure is compact and reasonable.
附图说明Description of drawings
图1为该发明创造剖视图；Fig. 1 is a sectional view of the invention;
图2为唇形密封圈结构示意图；Figure 2 is a schematic diagram of the structure of the lip seal;
图3为环形密封槽、环形防尘密封槽结构示意图；Fig. 3 is a structural schematic diagram of an annular sealing groove and an annular dustproof sealing groove;
图4为防尘密封圈结构示意图。Fig. 4 is a schematic diagram of the structure of the dustproof sealing ring.
具体实施方式detailed description
下面将结合说明书附图，对本发明创造作进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
一种液压缸新型密封装置，包括缸体2、活塞杆1、密封件3和挡圈4，其特征在于：还包括唇形密封圈结构，所述唇形密封圈结构由环形密封槽8和唇形密封圈5组成，所述环形密封槽8竖截面为矩形，底部带有环形凸台801，所述唇形密封圈5的竖截面为直角梯形结构，在直角梯形的直角腰和下底边上分别设有环形凹槽501、502，所述唇形密封圈5下底边上的环形凹槽502和环形密封槽8的环形凸台801配合，所述直角梯形的直角腰和环形密封槽8的上侧壁配合，所述直角梯形上底边和活塞杆1配合。A new sealing device for a hydraulic cylinder, comprising a cylinder body 2, a piston rod 1, a seal 3 and a retaining ring 4, characterized in that it also includes a lip seal ring structure, the lip seal ring structure consists of an annular seal groove 8 and The lip-shaped seal ring 5 is composed of a vertical section of the annular seal groove 8 that is rectangular, and has an annular boss 801 at the bottom. Annular grooves 501 and 502 are respectively arranged on the sides, and the annular groove 502 on the bottom edge of the lip seal 5 cooperates with the annular boss 801 of the annular seal groove 8, and the right-angled waist of the right-angled trapezoid and the annular seal The upper side wall of the groove 8 cooperates, and the upper base of the right-angled trapezoid cooperates with the piston rod 1 .
唇形密封圈5下底边上的环形凹槽502和环形密封槽的环形凸台801的密封作为一种加强密封结构，如若密封件3和挡圈4发生渗漏液压油现象，可以起到保证密封作用；并且直角梯形直角腰的环形凹槽501可以存放漏下的液压油，并且伴随着液压油的压力，直角梯形直角腰的环形凹槽501向外扩张，使唇形密封圈5紧紧和缸体2贴合，进一步加强密封效果。The seal of the annular groove 502 on the bottom edge of the lip seal ring 5 and the annular boss 801 of the annular seal groove is used as a reinforced sealing structure. If the seal 3 and the retaining ring 4 leak hydraulic oil, it can play The sealing effect is guaranteed; and the annular groove 501 of the right-angled trapezoidal right-angled waist can store the leaked hydraulic oil, and with the pressure of the hydraulic oil, the annular groove 501 of the right-angled trapezoidal right-angled waist expands outwards, making the lip seal ring 5 tightly It fits tightly with the cylinder body 2 to further strengthen the sealing effect.
进一步地：further:
在所述环形密封槽内还设有梯形密封圈6，所述梯形密封圈6的竖截面为直角梯形结构，所述直角梯形结构的直角腰和环形密封槽侧壁配合，所述直角梯形结构的斜角腰和所述唇形密封圈的斜角腰配合。Also be provided with trapezoidal sealing ring 6 in described annular sealing groove, the vertical section of described trapezoidal sealing ring 6 is right-angled trapezoidal structure, the right-angled waist of described right-angled trapezoidal structure cooperates with the side wall of annular sealing groove, and described right-angled trapezoidal structure The beveled waist of the lip seal fits with the beveled waist of the lip seal.
所述梯形密封圈6和在所述环形密封槽8采用过渡配合。The trapezoidal sealing ring 6 and the annular sealing groove 8 adopt a transition fit.
唇形密封圈5受到梯形密封圈6过渡配合的挤压，可以进一步提高唇形密封圈5的密封效果，同时梯形密封圈6还兼有挡圈的作用。The lip-shaped sealing ring 5 is extruded by the transition fit of the trapezoidal sealing ring 6, which can further improve the sealing effect of the lip-shaped sealing ring 5, and the trapezoidal sealing ring 6 also serves as a retaining ring.
所述唇形密封圈5下底边上的环形凹槽502的侧壁和底壁之间设有倒角503。A chamfer 503 is provided between the side wall and the bottom wall of the annular groove 502 on the bottom edge of the lip seal 5 .
倒圆角503的作用可以减少唇形密封圈5在工作中的变形，减低工作的疲劳损伤，提高密封效果，也有利于安装。The function of the rounded corner 503 can reduce the deformation of the lip seal 5 during work, reduce fatigue damage during work, improve the sealing effect, and facilitate installation.
在所述缸体和活塞杆之间还设有防尘密封结构，沿活塞杆伸出缸体方向上依次排列为密封件3和挡圈4、唇形密封结构、防尘密封结构。A dust-proof sealing structure is also provided between the cylinder body and the piston rod. Along the direction in which the piston rod extends out of the cylinder body, a seal 3 , a retaining ring 4 , a lip-shaped sealing structure, and a dust-proof sealing structure are arranged in sequence.
所述防尘密封结构设置在活塞杆1伸出缸体2端口处。The dust-proof sealing structure is arranged at the port where the piston rod 1 extends out of the cylinder body 2 .
所述防尘密封结构由环形防尘密封槽9和防尘密封圈7组成，所述环形防尘密封槽9底部设有环形凸台901，所述防尘密封圈7上表面和外侧面分别设有环形凹槽701、702，所述防尘密封圈7外侧面的环形凹槽702与环形防尘密封槽底部的环形凸台901配合，所述防尘密封圈7上表面和环形防尘密封槽9上侧壁配合。The dust-proof sealing structure is composed of an annular dust-proof sealing groove 9 and a dust-proof sealing ring 7, the bottom of the annular dust-proof sealing groove 9 is provided with an annular boss 901, and the upper surface and the outer surface of the dust-proof sealing ring 7 are respectively There are annular grooves 701, 702, the annular groove 702 on the outer surface of the dustproof seal ring 7 cooperates with the annular boss 901 at the bottom of the annular dustproof seal groove, the upper surface of the dustproof seal ring 7 and the annular dustproof The upper side wall of the sealing groove 9 cooperates.
所述防尘密封圈7和活塞杆配合的内侧面设有向内凹陷的圆弧703。The inner surface of the dust-proof sealing ring 7 and the piston rod is provided with an inwardly concave arc 703 .
所述防尘密封圈的内凹陷呈圆弧作用是，与活塞杆接触压力集中在内凹陷上下两端，这样能更好地起到“刮板”的效果，防尘密封性能大为改善。The inner depression of the dust-proof sealing ring is arc-shaped, and the contact pressure with the piston rod is concentrated at the upper and lower ends of the inner depression, which can better play the role of "scraper", and the dust-proof sealing performance is greatly improved.
以上显示和描述了本发明创造的基本原理、主要特征及优点。本行业的技术人员应该了解，本设计不受上述实施例的限制，上述实施例和说明书中描述的只是说明本设计的原理，在不脱离本设计精神和范围的前提下，本发明创造还会有各种变化和改进，这些变化和改进都落入要求保护的本设计范围内。本发明创造要求保护范围由所附的权利要求书及其等效物界定。The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the design is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principles of the design. Without departing from the spirit and scope of the design, the present invention will also There are various changes and improvements, and these changes and improvements all fall within the scope of the claimed design. The scope of protection required by the present invention is defined by the appended claims and their equivalents.
Claims (8)
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| CN201510709206.6A CN105221512B (en) | 2015-10-28 | 2015-10-28 | A kind of hydraulic cylinder new type sealing device |
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| CN105221512A CN105221512A (en) | 2016-01-06 |
| CN105221512B true CN105221512B (en) | 2017-03-15 |
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| CN107630860A (en) * | 2016-07-18 | 2018-01-26 | 丹阳市飞利健身器材有限公司 | A kind of aluminium rolls up processing cold-rolling mill two way seal roller cylinder structure |
| CN111577915A (en) * | 2020-05-18 | 2020-08-25 | 中国科学院微电子研究所 | An isolation valve and semiconductor manufacturing device |
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| EP2292936A1 (en) * | 2009-09-04 | 2011-03-09 | Kolben-Seeger GmbH & Co. KG Pneumatik und Hydraulik | Pneumatic cylinder |
| CN202250293U (en) * | 2011-07-29 | 2012-05-30 | 重庆长安汽车股份有限公司 | Plane sealing ring |
| CN203309116U (en) * | 2013-06-08 | 2013-11-27 | 南京福碧源环境技术有限公司 | Reinforced seal ring |
| CN204692297U (en) * | 2015-06-09 | 2015-10-07 | 上海龙胜实业有限公司 | For the non-metallic gasket sealed |
| CN205277967U (en) * | 2015-10-28 | 2016-06-01 | 南京工程学院 | Novel sealing device of pneumatic cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202013001260U1 (en) * | 2013-02-12 | 2014-05-14 | Bümach Engineering International B.V. | Working cylinder with pressure medium overflow |
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Patent Citations (5)
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|---|---|---|---|---|
| EP2292936A1 (en) * | 2009-09-04 | 2011-03-09 | Kolben-Seeger GmbH & Co. KG Pneumatik und Hydraulik | Pneumatic cylinder |
| CN202250293U (en) * | 2011-07-29 | 2012-05-30 | 重庆长安汽车股份有限公司 | Plane sealing ring |
| CN203309116U (en) * | 2013-06-08 | 2013-11-27 | 南京福碧源环境技术有限公司 | Reinforced seal ring |
| CN204692297U (en) * | 2015-06-09 | 2015-10-07 | 上海龙胜实业有限公司 | For the non-metallic gasket sealed |
| CN205277967U (en) * | 2015-10-28 | 2016-06-01 | 南京工程学院 | Novel sealing device of pneumatic cylinder |
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