WO2021082604A1 - 非金属浮动油封 - Google Patents

非金属浮动油封 Download PDF

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Publication number
WO2021082604A1
WO2021082604A1 PCT/CN2020/108037 CN2020108037W WO2021082604A1 WO 2021082604 A1 WO2021082604 A1 WO 2021082604A1 CN 2020108037 W CN2020108037 W CN 2020108037W WO 2021082604 A1 WO2021082604 A1 WO 2021082604A1
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Prior art keywords
ring
wear
plastic
oil seal
resistant
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PCT/CN2020/108037
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English (en)
French (fr)
Inventor
喻拯昊
喻思纯
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武汉鑫华封机械制造有限责任公司
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Publication of WO2021082604A1 publication Critical patent/WO2021082604A1/zh

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    • 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
    • F16J15/44—Free-space packings

Definitions

  • the utility model relates to the field of mechanical manufacturing, in particular to a non-metal floating oil seal.
  • Floating seal is a kind of dynamic seal. It has a good sealing effect in harsh working environments such as pulverized coal, silt, moisture, etc. It is a compact mechanical seal, generally used for the head of a scraper conveyor ( Tail) sprocket assembly, roadheader loading mechanism, left and right cutting drums and speed reducer of continuous shearer.
  • the structure of the floating oil seal is generally composed of a pair of wear-resistant metal rings (floating seal ring) and a pair of rubber rings, which are assembled in a special sealed cavity (floating seal seat) for use. When a moving and static floating seal ring rotates relatively, the contacting end faces form a sealing surface perpendicular to the axis.
  • the rubber ring is compressed in the sealing cavity formed with the floating seal seat to produce elastic deformation.
  • the sealing end surface is in the elastic force of the rubber ring. Under the action, a certain end-face specific pressure is generated. At this time, a very thin and basically complete oil film is formed and maintained on the seal end face, so that the two seal end faces are in boundary friction or semi-fluid friction conditions. When the seal end faces follow When the floating seal ring rotates and slides relatively, the oil film plays a sealing role.
  • the existing floating seal type is sealed by the bonding surface of two metal floating seal rings.
  • the metal floating seal ring is not wear-resistant. After a long time wear of the floating seal ring bonding surface, the gap between the bonding surfaces will increase and the surface will be lubricated. The oil will flow to the outside due to the pressure difference inside the tank, resulting in sealing failures such as seepage and oil leakage. It is very difficult to replace and repair. Moreover, the manufacturing cost of the metal floating seal ring is relatively high, the production is difficult, and the efficiency is low.
  • the purpose of the utility model is to provide a non-metal floating oil seal, which has greatly improved production efficiency, reduced production costs, strong market competitiveness, and realized energy-saving and environmentally-friendly upgrades of products.
  • a non-metal floating oil seal includes a plastic ring base.
  • the working surface of the plastic ring base is provided with a bayonet groove.
  • the bayonet on the wear ring is embedded in the bayonet groove, so that the plastic ring base and the wear ring Form an integral floating oil seal ring.
  • the working surface of the plastic ring base is provided with a serrated groove near the outer edge, and a serration matched with the serrated groove is arranged under the wear ring, and the serration is clamped into the serrated groove to complete the installation of the wear ring.
  • the body of the wear-resistant ring and the bayonet pin form a step shape, which is convenient for the bayonet pin to be inserted into the bayonet groove.
  • the surface of the wear-resistant ring protrudes 1.5-3 mm from the working surface of the plastic ring base.
  • the wear-resistant surface of the wear-resistant ring has a width of 2-5 mm.
  • the plastic ring matrix is made of PPS modified engineering plastics.
  • the wear-resistant ring is made of PES or PEEK engineering plastics.
  • the beneficial effects of the utility model are: wear-resistant rings made of PES or PEEK special engineering plastics replace metal rings with wear resistance and sealing performance; PPS modified engineering plastic rings replace metal rings
  • the body improves product quality, greatly improves production efficiency, reduces production costs, and has strong market competitiveness. It realizes energy-saving and environmental protection upgrades.
  • the wear-resistant ring and the plastic ring base are connected through serrations and serrated grooves. Relative sliding will occur, and the sealing effect and wear resistance effect will be significantly enhanced.
  • Figure 1 is a schematic diagram of the overall structure of the utility model
  • Figure 2 is a schematic diagram of the cross-sectional structure of the plastic ring base of the utility model
  • Figure 3 is a schematic view of a partial three-dimensional structure of the plastic ring base of the utility model
  • Figure 4 is a schematic diagram of the overall structure of the plastic ring base working surface of the utility model
  • Figure 5 is a schematic diagram of the three-dimensional structure of the wear ring of the utility model
  • Figure 6 is a schematic diagram of the overall structure of the wear ring of the utility model
  • Fig. 7 is a schematic diagram of the installation structure of the plastic ring base and the wear-resistant ring of the present invention.
  • the utility model provides a technical scheme:
  • a non-metallic floating oil seal including a plastic ring base 1, the working surface of the plastic ring base 1 is provided with a bayonet groove 2, and the bayonet 5 provided on the wear ring 3 is embedded in In the bayonet groove 2, the plastic ring base 1 and the wear ring 3 form an integral floating oil seal ring.
  • the working surface of the plastic ring base 1 is provided with a serration groove 4 near the outer edge, and a serration 6 matching the serration groove 4 is provided under the wear ring 3, and the serration 6 is clamped into the serration groove 4 to complete the resistance. Installation of grinding ring 3.
  • the body of the wear ring 3 and the bayonet 5 form a step shape, which facilitates the bayonet 5 to be inserted into the bayonet groove 2.
  • the bayonet pin 5 is inserted into the bayonet groove 2, and the serration 6 is clamped into the serration groove 4 to complete the installation of the wear ring 3.
  • the wear ring 2 and the plastic ring base 1 are very convenient and resistant to installation.
  • the grinding ring 2 and the plastic ring base 2 are connected by serrations and serration grooves. After the installation of the wear ring 2 is completed, relative sliding will not occur, and the sealing effect and the wear resistance effect are significantly enhanced.
  • the surface of the wear ring 3 protrudes 1.5-3 mm from the working surface of the plastic ring base 1.
  • the plastic ring base 1 is made of PPS modified engineering plastics.
  • the wear ring 3 is made of PES or PEEK engineering plastics.
  • PES or PEEK special engineering plastics have unique and excellent properties: 1. They have mechanical strength similar to aluminum alloy materials; 2. They are resistant to high and low temperature conditions. It is the most prominent material characteristics of polyethersulfone-PES and polyetheretherketone-PEEK (continuous use temperature 180°C-250°C, low temperature -40°C-60°C); 3. Excellent sliding characteristics, low friction coefficient and wear resistance Purpose: It has excellent sliding and self-lubricating properties; 4. Chemical resistance and corrosion resistance; 5. Hydrolysis resistance. These material characteristics basically meet the applicable requirements of floating seal rings and can completely replace existing metal rings. At the same time, because the PPS modified engineering plastic of the ring body is lighter in weight than the metal ring, the processing cost is lower than that of the metal ring. In addition, the injection molded product has high quality and higher efficiency, and has strong market competitiveness.
  • PES or PEEK materials have unique wear resistance and other mechanical properties that are superior to metal rings, and are very suitable for wear-resistant working surface bright band rings of floating oil seal rings. Because the floating oil seal ring must be put on a rubber ring before it can be used. The rubber ring is also an important first-level seal. The working condition tolerance of the rubber ring also limits the sealing performance of the floating oil seal ring, the ability to adapt to the working condition, and even the service life. For example: Nitrile rubber ring can only adapt to high temperature of 120°C to 150°C, and low temperature of -20°C to 30°C. The life of the floating seal ring and the rubber ring fitted with it can be equal to each other.
  • the rubber ring has an aging cycle, which has a great impact on the service life. No matter the floating seal ring is strong and wear-resistant, it must work with the rubber ring. Once the rubber ring is aging and fails, the entire floating seal is scrapped together. Therefore, the performance of the PPS modified engineering plastic floating seal ring body material is correct as long as it is equivalent to the working conditions of the nitrile rubber ring, silica gel, fluorine rubber, and hydrogenated nitrile rubber ring, or satisfies the same conditions. match. Mainly to withstand 120°C ⁇ -30°C; oil resistance or acid-base corrosion performance is equivalent to the performance of the rubber ring.
  • PPS, PES, and PEEK materials can all be superior and worry-free; for the strength and toughness, the plastic ring body only needs to be stronger than the cast iron ring.
  • PPS modified engineering plastics can meet, even more superior.
  • the PES or PEEK special engineering plastics used on the wear surface of the floating seal ring, in addition to the physical and chemical properties are all better than the PPS and rubber ring family, but also has the characteristics of more wear resistance than the steel ring, only this special feature, it is The most critical point of victory. Therefore, the new all-plastic floating seal ring can completely replace the metal ring.
  • all the quality and quality of the new all-plastic floating seal ring are better than metal rings; the manufacturing cost can be lower than that of metal rings; energy saving and environmental protection; no pollution; high digital production efficiency; black light factories can be realized; product upgrades can be completed Replacement.
  • the width of the wear surface of the PES or PEEK wear ring is 2-5mm, which is the corresponding requirement for the width of the bright belt ring on the wear-resistant working surface according to the size of the floating seal ring.
  • the thickness of the wear-resistant layer of the wear-resistant ring is 1.5-3mm, which is also given different thicknesses according to the size of the floating seal ring.
  • the wear-resistant layer of the existing metal ring in single use tends to be scrapped and becomes invalid when it wears at most about 2mm.
  • the thick wear-resistant layer is also unnecessary waste. Especially the whole body of the cast metal ring is cast with wear-resistant precious metal components, which is high in cost. The waste is big.
  • PES PEEK materials are used for a little amount of wear-resistant layer 2-5mm wide x 1.5-3mm thick, it is the good steel that is only used on the blade. Instead of a ring body with wear resistance, using low-cost applicability and adequate PPS material is the optimal combination of scientific and economic calculations. This is because the superior wear resistance of PES or PEEK materials makes the wear-resistant layer wear down to the time it takes to scrap, which greatly exceeds the service life of the rubber ring. At the same time, even if the wear-resistant layer 1.5-3mm is worn out, the rubber ring has not been completely aging and rigid, but the rubber ring is absolutely unable to rely on the resilience to compensate for the 2-3mm gap formed by the working surface of the floating seal ring due to wear.
  • Figure 3 and Figure 4 show the floating seal ring, PPS modified engineering plastic ring body.
  • PPS modified engineering plastics can meet all the physical properties of the original cast iron metal ring, and it is better than the cast iron metal ring. The only exception is the wear resistance of the working surface, which is solved by the PES or PEEK special engineering plastic wear ring embedded on it. PPS material is much cheaper than PES, PEEK and the processing difficulty is much less. Energy saving, environmental protection, high quality and low price are the most prominent advantages of the present invention.

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

Abstract

一种非金属浮动油封，包括塑料环基体（1），所述塑料环基体（1）的工作面上开设有卡销槽（2），耐磨环（3）上开设的卡销（5）嵌入到卡销槽（2）内，使得塑料环基体（1）和耐磨环（3）形成一个整体浮动油封环。所述塑料环基体（1）的工作面靠近外缘处设置有锯齿槽（4），在耐磨环（3）的下方设置有与锯齿槽（4）相配套的锯齿（6），锯齿（6）卡入到锯齿槽（4）内从而完成耐磨环（3）的安装，耐磨环（3）和塑料环基体（1）通过锯齿（6）和锯齿槽（4）配合连接，耐磨环（3）安装完成后不会产生相对的滑动，密封效果和耐磨损效果显著增强；由PES或PEEK特种工程塑料制成的耐磨环（3）替代了金属环，改善了耐磨损密封性能；PPS改性工程塑料环体替代金属环体使产品质量提升，生产效率提高，生产成本降低。

Description

非金属浮动油封 技术领域
本实用新型涉及机械制造领域，具体为一种非金属浮动油封。
背景技术
浮动密封是动密封的一种，在多煤粉、泥沙、水气等恶劣工作环境中有较好的密封效果，是一种紧凑型的机械密封，一般用于刮板输送机机头(尾)链轮组件、掘进机装载机构、连续采煤机左、右截割滚筒和减速器等结构中。浮动油封的结构一般是由一对耐磨的金属环(浮封环)和一对橡胶圈组成，装配在专用密封腔体(浮封座)内使用。一动一静的浮封环在相对转动时，相接触的端面形成垂直于轴线的密封面，橡胶圈在与浮封座形成的密封腔内受压缩产生弹性变形，密封端面在橡胶圈的弹性力作用下，产生一定的端面比压，此时，在密封端面上行成并保持一层极薄的基本完整的油膜，使两密封端面之间处于边界摩擦或半流体摩擦工况，当密封端面随着浮封环的相对转动而相对滑动时，油膜起到了密封作用。
现有浮动密封式是靠两金属浮封环贴合面进行密封的，金属浮封环不耐磨损，浮封环贴合面经过长时间的磨损后，贴合面间隙会增大，润滑油会因箱体内部压力差而流到外界，产生渗、漏油等密封失效现象，进行更换、维修都非常困难，而且金属浮封环制造成本较高，生产难度较大、效率低。
实用新型内容
本实用新型的目的在于提供一种非金属浮动油封，生产效率大大提高，生产成本降低，市场竞争力强，实现产品节能环保升级换代。
本实用新型的技术方案：
一种非金属浮动油封，包括塑料环基体，所述塑料环基体的工作面上开设 有卡销槽，耐磨环上开设的卡销嵌入到卡销槽内，使得塑料环基体和耐磨环形成一个整体浮动油封环。
所述塑料环基体的工作面靠近外缘处设置有锯齿槽，在耐磨环的下方设置有与锯齿槽相配套的锯齿，锯齿卡入到锯齿槽内从而完成耐磨环的安装。
所述耐磨环的本体与卡销形成台阶状，便于卡销插入到卡销槽。
所述耐磨环的表面凸出塑料环基体的工作面1.5-3毫米。
所述耐磨环的耐磨面宽2-5mm。
所述塑料环基体采用PPS改性工程塑料制作而成。
所述耐磨环采用PES或PEEK工程塑料制作而成。
与现有技术相比，本实用新型的有益效果是：由PES或PEEK特种工程塑料制成的耐磨环以此替代了金属环耐磨损密封性能；PPS改性工程塑料环体替代金属环体使产品质量提升，生产效率大大提高，生产成本降低，市场竞争力强，实现产品节能环保升级换代，而且耐磨环和塑料环基体通过锯齿和锯齿槽配合连接，耐磨环安装完成后不会产生相对的滑动，密封效果和耐磨损效果显著的增强。
附图说明
图1为本实用新型的整体结构示意图；
图2为本实用新型的塑料环基体横截面结构示意图；
图3为本实用新型的塑料环基体局部立体结构示意图；
图4为本实用新型的塑料环基体工作面整体结构示意图；
图5为本实用新型的耐磨环立体状结构示意图；
图6为本实用新型的耐磨环整体结构示意图；
图7为本实用新型的塑料环基体和耐磨环安装结构示意图。
具体实施方式
下面将结合本实用新型实施例中的附图，对本实用新型实施例中的技术方 案进行清楚、完整地描述，显然，所描述的实施例仅仅是本实用新型一部分实施例，而不是全部的实施例。基于本实用新型中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本实用新型保护的范围。
本实用新型提供一种技术方案：
请参阅图1和图7，一种非金属浮动油封，包括塑料环基体1，所述塑料环基体1的工作面上开设有卡销槽2，耐磨环3上开设的卡销5嵌入到卡销槽2内，使得塑料环基体1和耐磨环3形成一个整体浮动油封环。所述塑料环基体1的工作面靠近外缘处设置有锯齿槽4，在耐磨环3的下方设置有与锯齿槽4相配套的锯齿6，锯齿6卡入到锯齿槽4内从而完成耐磨环3的安装。所述耐磨环3的本体与卡销5形成台阶状，便于卡销5插入到卡销槽2。
卡销5插入到卡销槽2，锯齿6卡入到锯齿槽4内从而完成耐磨环3的安装，由于卡销5的设计，耐磨环2和塑料环基体1安装起来十分方便，耐磨环2和塑料环基体2通过锯齿和锯齿槽配合连接，耐磨环2安装完成后不会产生相对的滑动，密封效果和耐磨损效果显著的增强。
所述耐磨环3的表面凸出塑料环基体1的工作面1.5-3毫米。
所述塑料环基体1采用PPS改性工程塑料制作而成。
所述耐磨环3采用PES或PEEK工程塑料制作而成。
PES或PEEK特种工程塑料由于其具备特有的优异品性：1，具有的机械强度与铝合金材相似；2，耐高低温工况。是聚醚砜-PES，聚醚醚酮-PEEK最突出的材质特性(连续使用温度180℃-250℃，低温-40℃--60℃)；3，滑动特性出众，低摩擦系数耐磨耗用途，有优异的滑动自润滑特性；4，耐化学药品等腐蚀性能；5，耐水解性。这些材质特征，基本符合浮封环适用要求，完全可以代替现有金属环。同时，由于环体PPS改性工程塑料重量轻材料成本低于金属环，加工成本更比金属环低，加之注塑加工的产品质量高，效率更高，具有很强的市场竞 争力。
PES或PEEK材料所具备的独特的优于金属环耐磨性能及其他机械性能，非常适合用于浮动油封环的耐磨损工作面亮带环。因为浮动油封环要套上一根橡胶圈以后才能使用。橡胶圈也是重要的一级密封，橡胶圈的工况耐受能力也限制了浮动油封环的密封性能，适应工况能力，甚至使用寿命。例如：丁晴胶圈只能适应120℃至150℃高温，低温-20℃至30℃。浮封环与之所配装的橡胶圈能两者等寿命为好。橡胶圈存在老化周期，对使用寿命影响很大，浮封环再坚固耐磨，也必须伴随胶圈工作，胶圈一旦老化失效，整套浮封一起报废。所以PPS改性工程塑料浮封环体材料性能上，只要与所配丁晴橡胶圈或硅胶，氟胶，氢化丁晴胶圈所能适应的工况条件相当，或满足相同的条件，就是正确匹配。主要就是耐受120℃～-30℃；耐油性或酸碱腐蚀性能，与所配橡胶圈性能相当。而PPS,PES，PEEK材料性能均可优胜无忧；强韧性能，塑料环体只要强过铸铁环就可以。PPS改性工程塑料都可满足，甚至优越更多。而用在浮封环磨损工作面上的PES或PEEK特种工程塑料，除了理化性能全部优于PPS和橡胶圈一族之外，还具有比钢铁环更耐磨损的特性，仅此特长，正是最关键的优胜点。也因此使全塑新型浮封环能完全替代金属环。还有更重要的是，新型全塑浮封环一切质量品质均优于金属环；制造成本可低于金属环；节能环保；无污染；数字化生产效率高；可实现黑灯工厂；完成产品升级换代。
PES或PEEK耐磨环的耐磨面宽2-5mm，这是依据浮封环型号大小不同对耐磨工作面亮带环宽度的对应要求。同样耐磨环耐磨层厚度1.5-3mm，也是依据浮封环型号大小不同，而给予不同厚度。现有金属环单只使用中耐磨层最多磨耗2mm左右就趋报废失效，再厚的耐磨层也是多余的浪费，特别是铸造金属环整体全身都是耐磨损贵金属成分铸就，成本高，浪费大。PES,PEEK材料用于耐磨层2-5mm宽x1.5-3mm厚一点点用量，正是好钢只用在刀刃上。而不需要具备耐磨性能的环体，则用低价适用性对应够用的PPS材料，正是科学经济最优计算组 合。这是因为PES或PEEK材料优越的耐磨损性能，使耐磨层磨掉到报废所需时日，大大超过橡胶圈的使用寿命。同时，就算耐磨层1.5-3mm被磨损耗尽，橡胶圈还未彻底老化僵硬，但是橡胶圈此刻已绝对无力靠回弹力去弥补浮封环工作面因磨损而形成的2-3mm的间隙，漏油还是会发生。这就是耐磨层为什么只需1.5-3mm厚的原因所在。而并不必要太厚。因为那是多余的浪费。浮封环工作亮带面耐磨损时间与所配装的橡胶圈抗老化失效所能有效工作时间大致相近，两者等寿命设计安排，就是最科学经济的。
参见图3和图4：图3和图4所示为浮封环，PPS改性工程塑料环体。PPS改性工程塑料能满足原铸铁金属环所具备的全部物理性能，且优过铸铁金属环。唯一除外的是工作面的耐磨损性能，是由镶嵌其上的PES或PEEK特种工程塑料耐磨环来承担解决。PPS材料比PES,PEEK价格便宜很多及加工难度也小得多。节能环保，物美价廉是本发明最突出优势。
尽管已经示出和描述了本实用新型的实施例，对于本领域的普通技术人员而言，可以理解在不脱离本实用新型的原理和精神的情况下可以对这些实施例进行多种变化、修改、替换和变型，本实用新型的范围由所附权利要求及其等同物限定。

Claims (7)

  1. 一种非金属浮动油封，其特征在于，包括塑料环基体(1)，所述塑料环基体(1)的工作面上开设有卡销槽(2)，耐磨环(3)上开设的卡销(5)嵌入到卡销槽(2)内，使得塑料环基体(1)和耐磨环(3)形成一个整体浮动油封环。
  2. 根据权利要求1所述的一种非金属浮动油封，其特征在于，所述塑料环基体(1)的工作面靠近外缘处设置有锯齿槽(4)，在耐磨环(3)的下方设置有与锯齿槽(4)相配套的锯齿(6)，锯齿(6)卡入到锯齿槽(4)内从而完成耐磨环(3)的安装。
  3. 根据权利要求1所述的一种非金属浮动油封，其特征在于，所述耐磨环(3)的本体与卡销(5)形成台阶状，便于卡销(5)插入到卡销槽(2)。
  4. 根据权利要求3所述的一种非金属浮动油封，其特征在于，所述耐磨环(3)的表面凸出塑料环基体(1)的工作面1.5-3毫米。
  5. 根据权利要求3所述的一种非金属浮动油封，其特征在于，所述耐磨环(3)的耐磨面宽2-5mm。
  6. 根据权利要求1-5任一所述的一种非金属浮动油封，其特征在于，所述塑料环基体(1)采用PPS改性工程塑料制作而成。
  7. 根据权利要求6所述的一种非金属浮动油封，其特征在于，所述耐磨环(3)采用PES或PEEK工程塑料制作而成。
PCT/CN2020/108037 2019-10-31 2020-08-10 非金属浮动油封 WO2021082604A1 (zh)

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