产品介绍

防尘油封DKBI（乳黄）,是由聚氨酯防尘油封搭配外壳冷轧钢板结合而成,是款适用于震动大的工程机械挖机或高压油缸设备上的往复运动用防尘油封产品.

东晟密封提供密封系统解决方案及产品设计服务

产品特点

构槽简单，尺寸稳定性好

THE GROOVE IS SIMPLE AND THE DIMENSION IS STABLE

防尘油封DKBI（乳黄），防尘、防震、耐磨无粘滞现象，在有润滑和无润滑时性能都很好。

^{防尘油封DKBI（乳黄）}

^{防尘油封DKBI（乳黄）}

产品优势

• 01减少机械故障REDUCE MECHANICAL FAILURE

  使用合适的广州东晟密封油封密封件，能让您减少工程机械设备的故障几率，能保证生产效率，让机械使用寿命更长久。

  

• 02提高生产效率INCREASE PRODUCTIVITY

  油封使其提高生产效率，深受大批量客户的认可。

  

• 03油封耐用周期长LONG LIFE CYCLE

  油封耐用周期长，能减少密封机械设备因为泄漏问题的拆装次数，为用户节约生产成本及损坏内部风险.

  

• 04油封性能优良EXCELLENT PERFORMANCE

  专注研发油封、油封修理包及油封散件，免费为客户根据需求工况设计密封方案，将其发挥密封性能，符合工作环境的需求.

  

应用行业

防尘油封DKBI（乳黄）使用场景为：施工工程Construction Engineering、开采工程Mining Engineering

防尘油封DKBI

DUST PROOF OIL SEAL DKBI

构槽简单，尺寸稳定性好

THE GROOVE IS SIMPLE AND THE DIMENSION IS STABLE

防尘、防震、耐磨无粘滞现象

DUSTPROOF, SHOCKPROOF, WEAR-RESISTANT AND ADHESION-FREE

在有润滑和无润滑时性能都很好

GOOD PERFORMANCE WITH OR WITHOUT LUBRICATION

防尘油封DKBI（乳黄），防尘、防震、耐磨无粘滞现象，在有润滑和无润滑时性能都很好。

Dust Proof Oil Seal DKBI (Milky Yellow), dustproof, shockproof, wear-resistant and adhesion-free, performs well both with and without lubrication.

施工工程 Construction Engineering

城市基建、道路铺设、桥梁架设与水利工程现场，轮式装载机、压路机、挖掘机、推土机等设备全天候作业，沥青摊铺机、混凝土泵车的油缸部位更是直接暴露在粘性粉尘环境中。施工扬尘与沥青颗粒、水泥灰、石灰粉不同，具有遇水结垢、遇热粘结的特性，活塞杆伸出时粘带上的介质会在普通防尘油封唇口结晶堆积，形成硬质结垢层，唇口逐渐失去弹性贴合能力，尘土越过密封唇进入油缸腔体，导致液压油污染、柱塞拉伤与动作迟滞。防尘油封DKBI（乳黄）的抗粘滞特性在此工况下直接对应解决这一痛点——乳黄橡胶配方表面能低，沥青与水泥颗粒难以在唇口粘附结垢，活塞杆缩回时便可顺畅剥离，唇口始终保持干净的密封界面。施工场地空间有限、维护时间紧张，DKBI构槽简单的设计让现场更换无需专用工装，两名维修工半小时即可完成一支油缸的油封替换，减少因密封失效造成的停工损失与油品更换频率，普通油封在这类工况下平均三个月即需更换，DKBI可稳定运行六至八个月。施工机械液压系统的润滑脂常被扬尘稀释冲走，DKBI在无润滑状态下仍能维持稳定防尘屏障的特性，让设备在润滑条件波动时依然得到可靠保护。

At urban infrastructure, road paving, bridge construction and hydraulic engineering sites, wheel loaders, rollers, excavators and bulldozers operate around the clock. Cylinder rods of asphalt pavers and concrete pump trucks are directly exposed to sticky dust environments. Construction dust, unlike asphalt particles, cement ash and lime powder, tends to scale when wet and bond when heated. Media carried on extending piston rods crystallizes and accumulates on the lips of conventional dust seals, forming hard scale layers that gradually cause the lip to lose elastic conformity. Dust then crosses the sealing lip into the cylinder chamber, leading to hydraulic oil contamination, plunger scoring and sluggish operation. The anti-adhesion property of DKBI (milky yellow) dust seals directly addresses this pain point — the low surface energy of the milky yellow rubber compound makes it difficult for asphalt and cement particles to adhere and scale on the lip; particles are smoothly stripped away as the piston rod retracts, keeping the lip always in a clean sealing interface. Construction sites have limited space and tight maintenance schedules; the simple groove design of DKBI allows on-site replacement without special tooling. Two maintenance workers can complete a seal replacement on one cylinder in half an hour, reducing downtime losses and oil change frequency caused by seal failure. Conventional dust seals in such conditions require replacement every three months on average, while DKBI operates stably for six to eight months. Lubricating grease in construction machinery hydraulic systems is often diluted and washed away by construction dust. The ability of DKBI to maintain a stable dust barrier even without lubrication ensures reliable protection when lubrication conditions fluctuate.

开采工程 Mining Engineering

露天矿山、采石场与井下开采作业面，环境中的岩石碎屑、矿粉与潮湿水汽构成了密封件最严苛的考验。矿场粉尘主要成分为石英、长石与金属氧化物，莫氏硬度五至七级，棱角尖锐如细刃，是普通防尘油封DKBI的头号杀手——聚四氟乙烯唇口一至两个月便会被切出连续沟槽，丁腈橡胶唇口在矿粉反复犁削下三至四个月即出现明显磨损。采掘设备的铲斗油缸、动臂油缸、行走机构与钻机加压油缸常年在粉尘包围中往复伸缩，任何微小的唇口磨损都会迅速演变为颗粒侵入通道，加速导向套磨损与液压油变质。防尘油封DKBI（乳黄）的耐磨无粘滞特性在此工况下直接对应解决这一核心矛盾——乳黄橡胶配方经过特殊填充改性，表层致密性提升，矿粉颗粒难以切入唇口形成连续犁削沟槽，唇口在矿石粉尘冲刷下仍能维持完整的密封贴合面。矿区昼夜温差大，夏季暴晒可达八十摄氏度以上，冬季冻裂可至零下四十摄氏度，DKBI温度覆盖负四十至正八十摄氏度的参数范围恰好匹配矿区全年温度区间，乳黄橡胶的尺寸稳定性在高温暴晒后不软化膨胀、低温冻融后不脆裂收缩，沟槽加工简单的设计让井下空间狭窄、工具不全的条件下也能实现快速更换。矿区润滑脂常被矿粉污染失效，DKBI在有润滑与无润滑状态下均能维持稳定防尘屏障的特性，让设备在润滑条件恶化时依然得到可靠保护，有效延长油缸总成的油封使用寿命，为矿山设备的高负荷连续生产提供坚实密封支撑。

At open-pit mines, quarries and underground mining faces, rock debris, mineral powder and moist vapor constitute the most severe test for seals. Mining dust consists mainly of quartz, feldspar and metal oxides, with Mohs hardness of 5 to 7 and sharp edges like fine blades — the number one killer of conventional dust seals. PTFE lips are cut with continuous grooves within one to two months, and NBR lips show obvious wear after three to four months under repeated plowing by mineral powder. Bucket cylinders, boom cylinders, travel mechanisms and drill press cylinders of mining equipment extend and retract year-round surrounded by dust. Any tiny lip wear rapidly evolves into a particle intrusion channel, accelerating guide sleeve wear and hydraulic oil degradation. The wear-resistant and adhesion-free property of DKBI (milky yellow) dust seals directly addresses this core contradiction — the specially filled and modified milky yellow rubber compound has improved surface density, making it difficult for mineral powder particles to cut into the lip and form continuous plowing grooves. The lip maintains a complete sealing interface even under ore dust erosion. Mining areas have large temperature variations between day and night: summer exposure can exceed 80°C, winter freezing can drop to -40°C. The DKBI temperature range of -40 to +80°C precisely matches the annual temperature interval of mining areas. The dimensional stability of milky yellow rubber ensures no softening or expansion after high-temperature exposure, no brittleness or shrinkage after low-temperature freeze-thaw. The simple groove design allows quick replacement even in narrow underground spaces with incomplete tools. Mining grease is often contaminated and degraded by mineral powder. The ability of DKBI to maintain a stable dust barrier both with and without lubrication ensures reliable protection when lubrication conditions deteriorate, effectively extending the service life of cylinder assemblies and providing solid sealing support for high-load continuous production of mining equipment.

适合往复运动速度≤1m/s，压力≤0.1Mpa，温度-40~+80℃

SUITABLE FOR RECIPROCATING MOTION SPEED ≤1M/S, PRESSURE ≤0.1MPA, TEMPERATURE -40~+80℃

防尘油封DKBI（乳黄）使用场景为：施工工程 Construction Engineering、开采工程 Mining Engineering

Application Scenarios for Dust Proof Oil Seal DKBI (Milky Yellow): Construction Engineering, Mining Engineering

广州东晟油封厂家

GUANGZHOU DONGSHENG OIL SEAL MANUFACTURER

dshseals.cn

集研发、生产、销售于一体的国家高新技术油封厂家 · 235种材料配方 · 1725种选型方案

National High-Tech Enterprise integrating R&D, Production and Sales · 235 Material Formulations · 1725 Selection Solutions

使用说明

所有防尘油封均不能承压，即不具有密封功能，它的作用仅在于防尘，得与其他密封产品配套使用；

设计时应避免防尘油封的橡胶唇口与活塞杆孔或扳手对边相接触而导致被割破；

这是款应用于工程机械挖掘机设备上的橡胶油封密封件；

防尘油封DKBI 使用说明

DUST PROOF OIL SEAL DKBI · INSTALLATION & MAINTENANCE GUIDE

结构与材质 Structure & Material

防尘油封DKBI为单唇U型防尘结构，主体材质为NBR丁腈橡胶（乳黄色为NBR硫化后的典型本色，未添加染色剂），内部镶嵌碳钢骨架增强径向刚性，部分规格型号带副唇可刮除杆面残留介质。乳黄NBR橡胶配方的肖氏硬度A70±5，兼顾唇口弹性贴合与耐磨性能。

DKBI dust seal adopts a single-lip U-profile structure, with main body material being NBR nitrile rubber (milky yellow is the typical natural color of vulcanized NBR without dye), internally embedded with a carbon steel skeleton for enhanced radial rigidity. Some sizes feature a secondary lip to scrape residual media from the rod surface. The milky yellow NBR compound has a Shore A hardness of 70±5, balancing lip elasticity conformity and wear resistance.

安装要点 Installation Key Points

① 安装方向：唇口必须朝向活塞杆伸出方向（即防尘方向），装反则唇口受压力张开直接丧失防尘功能。
② 沟槽要求：沟槽外径公差H8，槽宽公差+0.1~+0.2mm，槽底圆角R0.3~R0.5mm，需符合GB/T 15420或ISO 7425标准。
③ 杆面准备：安装前清除杆面毛刺、锈蚀与旧油封残胶，杆端倒角15°~30°，杆面粗糙度控制在Ra 0.2~0.4μm。
④ 安装工具：使用专用套筒或导向锥，套筒外径比杆径大0.5mm，禁用螺丝刀、尖锥等尖锐工具直接撬动唇口，防止弹性结构出现不可逆损伤。
⑤ 润滑：安装时在唇口内侧与杆面涂抹少量锂基脂或液压油，干装会导致唇口初期摩擦磨损。

① Installation Direction: Lip must face the piston rod extension direction (dust-proof side). Reversed installation causes the lip to open under pressure, losing sealing function entirely.
② Groove Requirements: Groove outer diameter tolerance H8, groove width tolerance +0.1~+0.2mm, groove bottom radius R0.3~R0.5mm, complying with GB/T 15420 or ISO 7425.
③ Rod Preparation: Remove all burrs, rust and old seal residue before installation. Chamfer rod end at 15°~30°. Control rod surface roughness at Ra 0.2~0.4μm.
④ Installation Tooling: Use dedicated sleeve or assembly cone with sleeve outer diameter 0.5mm larger than rod diameter. Never use screwdrivers or sharp tools to pry the lip — this causes irreversible elastic damage.
⑤ Lubrication: Apply a thin coat of lithium grease or hydraulic oil to the inner lip surface and rod before installation. Dry assembly causes initial lip friction wear.

工况参数 Operating Parameters

往复速度：≤1 m/s（超过1.5m/s唇口摩擦热显著上升）
压力：≤0.1 MPa（防尘油封不承受液压缸工作压力，工作压力由主密封件承担）
温度范围：-40℃ ~ +80℃（持续超过85℃NBR会加速老化变硬）
适配介质：矿物基液压油、锂基脂、水乙二醇、低苯胺点矿物油
不推荐介质：磷酸酯系液压油、极性较强的合成油、高含量极压添加剂齿轮油

Reciprocating Speed: ≤1 m/s (friction heat rises significantly above 1.5m/s)
Pressure: ≤0.1 MPa (dust seals do not withstand cylinder working pressure — that is the primary seal's function)
Temperature Range: -40℃ ~ +80℃ (NBR accelerates aging and hardening above 85℃ continuously)
Compatible Media: Mineral-based hydraulic oils, lithium greases, water-glycol, low-aniline-point mineral oils
Not Recommended: Phosphate ester hydraulic fluids, highly polar synthetic oils, high EP additive gear oils

维护周期 & 失效排查 Maintenance Schedule & Failure Diagnosis

维护周期：
· 正常工况（清洁环境、矿物油）：6~12个月检查一次
· 粉尘工况（施工/采矿）：3~6个月检查一次
· 检查内容：唇口是否有裂纹、磨损沟槽、溶胀变形；杆面是否有拉伤；液压油是否有颗粒污染

常见失效与排查：
· 唇口装反 → 直接丧失防尘，尘土大量涌入，修正方向重装
· 唇口划伤 → 安装时尖锥撬入，更换油封并使用导向套筒
· 溶胀变软 → 介质不兼容（磷酸酯系），更换介质或选用FKM材质
· 硬变脆裂 → 持续高温超85℃，降低温度或选用耐高温材质
· 防尘失效但唇口完好 → 杆面粗糙度超差或沟槽尺寸超差，检查杆面与沟槽

Maintenance Schedule:
· Normal Conditions (clean environment, mineral oil): Inspect every 6~12 months
· Dusty Conditions (construction/mining): Inspect every 3~6 months
· Inspection Items: Lip cracks, wear grooves, swelling deformation; rod scoring; hydraulic oil particle contamination

Common Failures & Diagnosis:
· Reversed Installation → Complete dust-proof failure, massive dust ingress. Correct direction and reinstall.
· Lip Scratched → Caused by prying with sharp tools during installation. Replace seal and use assembly sleeve.
· Swollen & Softened → Media incompatibility (phosphate ester). Change media or specify FKM material.
· Hardened & Cracked → Continuous temperature above 85℃. Lower temperature or specify heat-resistant material.
· Dust Failure but Lip Intact → Rod roughness or groove dimension out of tolerance. Check rod surface and groove.

防尘油封DKBI（乳黄）适用行业：施工工程 Construction Engineering、开采工程 Mining Engineering、工程机械 Construction Machinery、矿山设备 Mining Equipment

广州东晟油封厂家

GUANGZHOU DONGSHENG OIL SEAL MANUFACTURER

dshseals.cn

集研发、生产、销售于一体的国家高新技术油封厂家 · 235种材料配方 · 1725种选型方案

National High-Tech Enterprise integrating R&D, Production and Sales · 235 Material Formulations · 1725 Selection Solutions