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WO2015003539A1 - 一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封 - Google Patents

一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封 Download PDF

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Publication number
WO2015003539A1
WO2015003539A1 PCT/CN2014/079666 CN2014079666W WO2015003539A1 WO 2015003539 A1 WO2015003539 A1 WO 2015003539A1 CN 2014079666 W CN2014079666 W CN 2014079666W WO 2015003539 A1 WO2015003539 A1 WO 2015003539A1
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WO
WIPO (PCT)
Prior art keywords
shaft
rubber seal
seal
ring
rubber
Prior art date
Application number
PCT/CN2014/079666
Other languages
English (en)
French (fr)
Inventor
赵晶玮
张军
杨帆
Original Assignee
艾志工业技术集团有限公司
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Application filed by 艾志工业技术集团有限公司 filed Critical 艾志工业技术集团有限公司
Publication of WO2015003539A1 publication Critical patent/WO2015003539A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3208—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip provided with tension elements, e.g. elastic rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings

Definitions

  • the invention relates to a rubber seal for a shaft used in a transmission device, in particular to a rubber seal for a shaft with a floating and gripping function, which can be arranged with an oblique tooth arrangement of a fixing ring.
  • the rubber seals used in transmission equipment include oil seals, dust seals, drawbar seals, piston seals, etc., because of their radial outer fixed surface, that is, the rubber seal outer diameter contact surface of the shaft is generally fixed by plane or 0 circle, or a few
  • the situation has a very small right-angled protrusion, which only functions as a frictional function.
  • the optimal interference amount has a small floating range. If the interference is too large, the installation will be difficult, and the interference will be small, resulting in a static seal. Leakage, even the rubber seal outer diameter of the shaft and the equipment cavity will slip and rotate.
  • the object of the present invention is to provide a rubber seal for a shaft whose radial outer fixing surface is designed to have an interference arrangement of helical teeth, which can effectively solve the problem of insufficient slip and elasticity caused by the difficulty in controlling the interference of the rubber seal of the conventional shaft.
  • the shaft is rubber-sealed for easy installation, reliable sealing and secure positioning. It can be used in transmission equipment with large shaft runout and large swing to ensure the reliability of equipment operation.
  • the utility model relates to a shaft rubber seal which can be arranged with an interference ring and has an interference design, and an outer diameter contact surface, an inner diameter contact surface or an outer diameter and an inner diameter contact surface are arranged in parallel with a plurality of oblique teeth, and the shaft is used for the shaft
  • the outer diameter contact surface of the rubber seal is designed with a fly-type interference and has a floating and gripping function.
  • the shaft seals the inner side surface of the main seal ring (ie, on the side of the seal fluid), the outer side surface (ie, away from the seal fluid side) or the two sides may be provided with a fixing ring, the fixing ring and the shaft
  • the rubber seal main seal ring can move relative to each other, so that the main seal ring in the middle of the retaining ring has the function of floating up and down.
  • the number of the helical teeth is three or more, and the angle between the helical teeth and the contact surface is less than 90 degrees in the free state and the compressed state, and may be inclined toward the sealing fluid side or may be inclined toward the sealing fluid side.
  • the arrangement may also include two types of helical teeth facing the sealing fluid side and facing away from the sealing fluid side.
  • the radial height of the helical teeth is greater than 1 mm.
  • the present invention can also adopt a one-piece rubber seal for the shaft, or cut the rubber seal for the shaft to form a rubber seal for the split shaft.
  • the inner diameter of the rubber seal for the shaft can also be provided.
  • One or more sealing lips form a heat dissipating cavity between the sealing lips, and the lip pieces may be inclined in the same direction or may be inclined in the opposite direction.
  • the invention has the following advantages: (1)
  • the outer diameter of the rubber seal of the shaft is designed to design parallel helical teeth with a tooth height of more than 1 mm, a plurality of outer diameter sealing lines are added, the static sealing effect is improved, and the floating is improved.
  • Elastic and firm wall-carrying force, the helical teeth facing the sealing fluid can be tightly sealed with the cavity by the fluid pressure, and the helical teeth facing away from the sealing fluid can effectively prevent the shaft from sealing out of the sealing cavity by the pressure of the sealing fluid.
  • the fly-type interference design of the rubber seal outer diameter of the shaft guarantees a large outer diameter compression amount, and does not cause a large shaft rubber seal inner diameter to shrink, and does not affect the seal lip.
  • the control of the volume and radial force ensures that the outer diameter is tightly fitted to the inner diameter of the sealing cavity of the device, does not slip, and is easy to install.
  • the design of the retaining ring on both sides of the rubber seal of the shaft can ensure that the main seal ring of the rubber seal on the shaft floats up and down directly in the radial direction of the fixed ring, adapting to the sharp jump of the shaft.
  • the shaft can be cut with a rubber seal.
  • the split shaft is sealed with a rubber. It is not necessary to disassemble the equipment when installing the replacement shaft with a rubber seal.
  • FIG. 1 is a schematic view showing a rubber sealing structure for a shaft in Embodiment 1 of the present invention
  • Figure 2 is a schematic view showing the rubber sealing structure for a shaft in Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural view of a rubber seal dust seal for a shaft according to Embodiment 3 of the present invention.
  • Figure 4 is a schematic view showing the structure of a rubber seal rod seal for a shaft in Embodiment 3 of the present invention.
  • Figure 5 is a schematic view showing the structure of a rubber seal seal for a shaft in Embodiment 3 of the present invention.
  • Figure 6 is a schematic view showing the structure of the shaft sealed by a rubber seal in the third embodiment of the present invention.
  • Fig. 7 is a view showing the structure of a rubber seal piston combination seal for a shaft according to a third embodiment of the present invention.
  • a floating shaft of an obliquely-arranged design with a fixed ring of the present invention is sealed with a rubber shaft, and the outer diameter of the rubber seal for the shaft is designed with a helical tooth, and the direction is oriented toward the sealing fluid helical tooth 1 .
  • the fluid fluid pressure is opened, it is tightly sealed with the cavity; the direction facing the sealing fluid helical tooth 2 can generate a firm wall-carrying force, preventing the shaft from being sealed by the sealing fluid with the pressure of the sealing fluid; the radial height is greater than 1 mm
  • the plurality of helical teeth 1 and 2 have a plurality of outer diameter sealing lines added to improve the static sealing effect and have floating elasticity.
  • the rubber seal outer diameter of the shaft is sealed by the flying fluid side.
  • the flyweight type interference design provides a large outer diameter compression, and does not cause a large shaft rubber seal inner diameter to shrink, and does not affect the seal lip. Surplus And the control of the radial force, while ensuring that the outer diameter is tightly fitted to the inner diameter of the sealing cavity of the device, does not slip, and is easy to install.
  • the inner side of the rubber seal for the shaft is provided with a fixing ring 4, the outer side is provided with a fixing ring 5, and the fixing ring 4 and 5 are connected with the rubber seal main sealing ring 6 for the shaft, and the main sealing ring 6 can be fixed ring 4 and 5 is floated up and down in the radial direction to accommodate the sharp runout or swing of the shaft, while the retaining rings 4 and 5 provide a good support for the main seal ring 6.
  • the rubber seal inner diameter of the shaft has a plurality of directions toward the sealing fluid helical teeth 7, and the rotary fluid is subjected to multiple rotary dynamic sealing; the direction is directed away from the sealing fluid helical teeth 8, and the external water, dust and the like are sealed, and arranged in parallel.
  • the helical teeth 7 and the helical teeth 8 can simultaneously support the shaft with a rubber seal stably on the shaft and produce a floating effect.
  • the outer diameter of the rubber seal for the shaft is designed to be away from the seal fluid side, and the helical gear height is greater than 1 mm.
  • the radial direction is greater than 1 mm, and the fluid-tight helical tooth 2 is produced, which can generate a firm wall-carrying force and prevent the shaft from being used.
  • the rubber seal is forced out of the sealed cavity by the pressure of the sealing fluid.
  • the rubber seal outer diameter of the shaft is on the side of the sealing fluid. 3
  • the fly-type interference design is adopted.
  • the outer side of the rubber seal for the shaft is provided with a fixing ring 5, and the fixing ring 5 and the rubber seal main sealing ring 6 for the shaft are connected by a floating connection, and the main sealing ring 6 can be vertically floated relative to the fixing ring 5 to adapt to the sharpness of the shaft. Bounce or swing, while the retaining ring 5 provides a good support for the main seal ring 6.
  • the rubber seal inner diameter of the shaft seal lip is provided with a plurality of directions toward the sealing fluid helical teeth 7, forming a multi-way dynamic seal for the sealing fluid.
  • the rubber seal for the shaft of the present embodiment is a dust seal in the hydropneumatic transmission device.
  • the outer seal ring of the rubber seal main shaft 6 is designed with a helical tooth, and a plurality of directions with a radial height of more than 1 mm are oriented toward the sealing fluid helical tooth 1, and the fluid pressure is tightly sealed with the cavity.
  • the inner diameter of the sealing lip of the rubber sealing main sealing ring 6 is provided with more than three directions facing away from the sealing fluid helical teeth 8, which can scrape oil multiple times, and is well insulated from various external pollutants such as water and dust.
  • the helical tooth 1 and the helical tooth 8 at the inner diameter play a floating role together, so that the rubber seal ring of the shaft can move up and down in the sealed cavity when the shaft is swung or laterally overloaded, and avoid being squeezed. The pressure is damaged and the seal is stable.
  • the rubber seal for the shaft of the present embodiment is a drawbar seal in a hydropneumatic transmission device.
  • Axis The outer diameter of the main seal ring 6 is sealed by rubber.
  • the helical teeth 1 and 2 in the opposite direction are arranged side by side.
  • the rubber seal main seal ring 6 has three or more helical teeth 8 at the inner diameter of the seal lip to form a multiple floating seal.
  • the rubber seal for the shaft of the present embodiment is a seal in a hydropneumatic transmission device.
  • the rubber seal static sealing elastic body 9 for the shaft adopts a square ring with the helical teeth 1 and 2 in the opposite direction on the outer diameter and arranged in parallel, and the rubber seal main seal ring 6 has more than three helical teeth at the inner diameter of the sealing lip. 7, forming multiple floating seals.
  • the rubber seal for the shaft of the present embodiment is a check seal in a hydropneumatic transmission device.
  • the rubber seal static sealing elastic body 9 for the shaft adopts a square ring with the helical gears 7 and 8 having opposite diameters arranged in the opposite direction, and the outer ring of the rubber seal main seal ring 6 is provided with the opposite direction rounded helical teeth 1 and 2 arranged side by side to form multiple floating seals.
  • the rubber seal for the shaft of this embodiment is a piston combination seal in a hydropneumatic transmission device.
  • the inner diameter of the rubber seal static sealing elastomer 9 for the shaft is designed with five helical teeth 7 arranged side by side and five oblique teeth 8 arranged in parallel in opposite directions.
  • the outer diameter of the rubber seal main seal ring 6 is provided with helical teeth in opposite directions. 1 and 2 are arranged side by side to form multiple floating seals.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Devices (AREA)

Abstract

一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封件，其外径、内径或者外径与内径的接触面上设有多个斜齿（1，2，7，8），并且外径接触面采用飞檐式过盈设计。在该轴用橡胶密封的内侧面、外侧面或者这两个侧面可以自带固定环（4，5），固定环与轴用橡胶密封主密封环之间可以相对移动，从而实现轴用橡胶密封主密封环有额外的上下浮动的功能。斜齿可以向密封流体侧倾斜或者背向密封流体侧倾斜，或者同时向这两个方向倾斜，使得轴用橡胶密封具有浮动弹性，提高静密封效果和浮动效果。

Description

一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封
技术领域
本发明涉及一种应用在传动设备中的轴用橡胶密封，具体涉及一种可自带固 定环的斜齿排列过盈设计的、 具有浮动及抓紧功能的轴用橡胶密封。
背景技术
传动设备中应用较广泛的橡胶密封包括油封， 防尘圈， 拉杆封， 活塞封等， 由于其径向外固定面即轴用橡胶密封外径接触面一般采用平面或 0圈固定设计， 或者少数情况有高度很小的直角突起，仅起到摩擦性的功能，其最佳过盈量浮动 范围较小，如果过盈量偏大，会导致安装困难，而过盈量偏小会导致静密封泄漏， 甚至轴用橡胶密封外径与设备腔体会发生打滑跟转的现象。
发明内容
本发明的目的在于提供一种径向外固定面为斜齿排列过盈设计的轴用橡胶 密封，能够有效解决上述传统轴用橡胶密封过盈量难控制造成的打滑及弹性不足 的问题， 确保轴用橡胶密封易于安装， 密封可靠且定位牢固。 并可在轴跳动、 摆 动偏大的传动设备中使用， 保证设备运行可靠性。
本发明采用如下技术方案：
一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封，其外径接触面、 内 径接触面或者外径和内径的接触面上设有多个斜齿平行排列，并且轴用橡胶密封 的外径接触面采用飞檐式过盈设计， 具有浮动及抓紧功能。
进一步的技术方案， 所述轴用橡胶密封主密封环的内侧面 （即靠密封流体 侧）、 外侧面 （即远离密封流体侧） 或者这两个侧面可以设有固定环， 固定环与 轴用橡胶密封主密封环之间可以相对移动，从而实现固定环中间的主密封环有上 下浮动的功能。
所述斜齿的数量为 3个或 3个以上，斜齿与接触面的夹角在自由状态和压缩 状态下均小于 90度， 可以为朝向密封流体侧倾斜， 也可以背向密封流体侧倾斜 排列， 也可以包含朝向密封流体侧和背向密封流体侧的两种斜齿。斜齿径向高度 均大于 1毫米。
进一步地， 本发明还可根据应用需求， 采用整体式的轴用橡胶密封， 或者对 轴用橡胶密封进行剖切，成为剖分式轴用橡胶密封。轴用橡胶密封内径也可设有 一个或多个密封唇片， 密封唇片之间形成散热腔， 唇片可以同向倾斜弯曲， 也可 以反向倾斜弯曲。
相比现有技术， 本发明具有以下优点： （1 )轴用橡胶密封外径设计齿高大于 1毫米的平行斜齿， 增加了数个外径密封线， 提高了静密封效果， 并且具有浮动 弹性和牢固的抓壁力， 朝向密封流体的斜齿可以利用流体压力与腔体贴紧密封， 背向密封流体的斜齿可有效防止轴用橡胶密封被密封流体的压力顶出密封腔体。
(2) 轴用橡胶密封外径的飞檐式过盈设计， 在保证提供较大的外径压缩量的同 时， 不会导致较大的轴用橡胶密封内径收缩， 不会影响到密封唇的过盈量和径向 力的控制， 同时确保外径与设备密封腔体内径紧密贴合密封， 不打滑， 并易于安 装。 （3 )轴用橡胶密封两侧的固定环设计， 可以确保轴用橡胶密封主密封环在固 定环直接沿径向上下浮动， 适应轴的剧烈跳动摆动。 （4)可将轴用橡胶密封剖切 成为剖分式轴用橡胶密封， 安装更换轴用橡胶密封时不需要拆卸设备。
附图说明
图 1是本发明实施例 1中的轴用橡胶密封结构示意图；
图 2是本发明实施例 2中的轴用橡胶密封结构示意图；
图 3是本发明实施例 3中的轴用橡胶密封防尘圈的结构示意图；
图 4是本发明实施例 3中的轴用橡胶密封拉杆封的结构示意图；
图 5是本发明实施例 3中的轴用橡胶密封斯特封的结构示意图；
图 6是本发明实施例 3中的轴用橡胶密封格来封的结构示意图；
图 7是本发明实施例 3中的轴用橡胶密封活塞组合封的结构示意图。
具体实施方式
实施例 1
如图 1所示，本发明的一种可自带固定环的斜齿排列过盈设计的浮动式轴用 橡胶密封，轴用橡胶密封外径采用斜齿设计， 方向朝向密封流体斜齿 1利用流体 流体压力张开后与腔体贴紧密封； 方向背向密封流体斜齿 2 可产生牢固的抓壁 力， 防止轴用橡胶密封被密封流体的压力顶出密封腔体； 径向高度大于 1毫米的 多个斜齿 1和 2增加了数个外径密封线，提高了静密封效果，并且具有浮动弹性。
轴用橡胶密封外径靠密封流体侧 3采用飞檐式过盈设计，提供了较大的外径 压缩量， 且不会导致较大的轴用橡胶密封内径收缩， 不会影响到密封唇的过盈量 和径向力的控制， 同时确保外径与设备密封腔体内径紧密贴合密封， 不打滑， 并 且易于安装。
轴用橡胶密封内侧面设有固定环 4， 外侧面设有固定环 5， 固定环 4和 5与 轴用橡胶密封主密封环 6之间采用浮动连接， 主密封环 6可以在固定环 4和 5 之间沿径向上下浮动， 以适应轴的剧烈跳动或摆动， 同时固定环 4和 5对主密封 环 6起到了良好的支撑保护作用。
同时， 轴用橡胶密封内径含多个方向朝向密封流体斜齿 7， 对密封流体进行 多重旋转动密封； 方向背向密封流体斜齿 8， 对外界水、 灰尘等污染物进行多重 密封， 并列排列的斜齿 7和斜齿 8， 同时可将轴用橡胶密封稳定支撑在轴上并产 生浮动效果。
实施例 2
如图 2所示，轴用橡胶密封外径远离密封流体侧采用斜齿设计，径向高度大 于 1毫米的多个方向背向密封流体斜齿 2， 可产生牢固的抓壁力， 防止轴用橡胶 密封被密封流体的压力顶出密封腔体。轴用橡胶密封外径靠密封流体侧 3采用飞 檐式过盈设计。
轴用橡胶密封外侧面设有固定环 5， 固定环 5与轴用橡胶密封主密封环 6之 间采用浮动连接， 主密封环 6可以相对固定环 5沿径向上下浮动， 以适应轴的剧 烈跳动或摆动， 同时固定环 5对主密封环 6起到了良好的支撑保护作用。
轴用橡胶密封内径密封唇部设有多个方向朝向密封流体斜齿 7， 对密封流体 形成多道动密封。
实施例 3
如图 3所示，本实施例的轴用橡胶密封是液压气动传动设备中的防尘圈。其 中，轴用橡胶密封主密封环 6外径采用斜齿设计， 设有径向高度大于 1毫米的多 个方向朝向密封流体斜齿 1， 利用流体压力与腔体贴紧密封。 橡胶密封主密封环 6的密封唇口内径处设有 3个以上的方向背向密封流体斜齿 8， 能够多重刮油， 并很好的隔离外界水、 灰尘等各种污染物， 外径处的斜齿 1 和内径处的斜齿 8 共同起到浮动作用，使轴用橡胶密封防尘圈可在轴杆大摆动或侧向重载的时候可 以在密封腔体内上下移动， 而避免被挤压损坏， 并且稳定密封。
如图 4所示，本实施例的轴用橡胶密封是液压气动传动设备中的拉杆封。轴 用橡胶密封主密封环 6外径采用相反方向的斜齿 1和 2并列排列设计，轴用橡胶 密封主密封环 6密封唇口内径处设有 3个以上的斜齿 8， 形成多重浮动密封。
如图 5所示，本实施例的轴用橡胶密封是液压气动传动设备中的斯特封。轴 用橡胶密封静密封弹性体 9采用外径上有相反方向的斜齿 1和 2并列排列设计的 方形圈， 轴用橡胶密封主密封环 6密封唇口内径处设有 3个以上的斜齿 7， 形成 多重浮动密封。
如图 6所示，本实施例的轴用橡胶密封是液压气动传动设备中的格莱封。轴 用橡胶密封静密封弹性体 9采用内径上有相反方向的斜齿 7和 8并列排列设计的 方形圈，轴用橡胶密封主密封环 6外径处设有相反方向的圆角斜齿 1和 2并列排 列， 形成多重浮动密封。
如图 7 所示， 本实施例的轴用橡胶密封是液压气动传动设备中的活塞组合 封。轴用橡胶密封静密封弹性体 9内径设计了 5个并列排列的斜齿 7和 5个并列 排列相反方向的斜齿 8， 轴用橡胶密封主密封环 6外径处设有相反方向的斜齿 1 和 2并列排列， 形成多重浮动密封。

Claims

权利 要求书
1. 一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封， 其特征在于， 轴用 橡胶密封的外径接触面、 内径接触面或者外径与内径的接触面上设有多个斜 齿平行排列， 并且轴用橡胶密封的外径接触面采用飞檐式过盈设计。
2. 根据权利要求 1所述的一种可自带固定环的斜齿排列过盈设计的轴用橡胶密 封， 其特征在于， 所述轴用橡胶密封自带固定环， 固定环设置在轴用橡胶密 封中主密封环的内侧面、 外侧面或者这两个侧面都有， 固定环与主密封环之 间采用浮动连接， 可以沿径向上下移动。
3. 根据权利要求 1或 2所述的一种可自带固定环的斜齿排列过盈设计的轴用橡 胶密封， 其特征在于， 所述斜齿的数量为 3个或 3个以上， 斜齿与接触面的 夹角在自由状态和压缩状态下均小于 90度； 斜齿径向高度均大于 1亳米。
4. 根据权利要求 1或 2所述的一种可自带固定环的斜齿排列过盈设计的轴用橡 胶密封， 其特征在于， 所述斜齿向密封流体侧倾斜排列， 或者背向密封流体 侧倾斜排列， 或者分别向这两个方向倾斜排列。
5. 根据权利要求 1或 2所述的一种可自带固定环的斜齿排列过盈设计的轴用橡 胶密封， 其特征在于， 所述轴用橡胶密封为整体式或者为剖分式。
PCT/CN2014/079666 2013-07-09 2014-06-11 一种可自带固定环的斜齿排列过盈设计的轴用橡胶密封 WO2015003539A1 (zh)

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