轴用Y型油封R08

产品参数

代码：R08

压力≤(MPa)：35

速度≤(m/s)：≤0.5m/s

温度℃：-35~80℃

材料：PU/NBR

应用：大型的工程机械设备、液压气动等行业中

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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

工程机械挖掘机油封

挖机Y型油封R08应用于：施工工程Construction Engineering、开采工程 Minning Engineering

排版丨轴用Y型油封R08 - 广州东晟油封厂家

轴用Y型油封R08

ROD Y-TYPE OIL SEAL R08

唇口自封作用，压力越高贴合越紧

SELF-ENERGIZING LIP, THE HIGHER THE PRESSURE THE TIGHTER THE FIT

单向密封作用，唇口必须朝向压力侧

SINGLE-ACTING SEAL, LIP MUST FACE THE PRESSURE SIDE

聚氨酯材质耐磨，往复运动摩擦系数低

WEAR-RESISTANT POLYURETHANE, LOW FRICTION FOR RECIPROCATING MOTION

挖机Y型油封R08，应用于施工工程Construction Engineering、开采工程Mining Engineering。

Excavator Y-type Oil Seal R08, applied in Construction Engineering and Mining Engineering.

施工工程 Construction Engineering

挖掘机、装载机在道路铺设与场地平整作业中，动臂、斗杆、铲斗三支油缸的活塞杆密封承受着高频往复与冲击载荷的双重考验。施工现场液压系统压力随工况在5~25MPa区间频繁波动，普通唇形油封在压力突变瞬间容易出现唇口短暂离缝，液压油沿杆面渗出形成渗油现象。轴用Y型油封R08依靠唇口自封作用应对这一工况——系统压力升高时压力油进入唇口根部迫使唇口进一步张开贴合杆面，压力越高密封越紧，压力回落时唇口弹性回缩维持低压密封，整个压力波动周期内密封界面始终闭合。挖掘机作业环境粉尘浓度高，活塞杆伸出时粘带的尘土会在回程时通过防尘圈与主密封之间，Y型油封作为杆用主密封，其聚氨酯材质耐磨性为丁腈橡胶的3~5倍，在杆面附着微量粉尘的工况下仍能维持唇口完整不被快速犁削。施工设备检修周期短，Y型油封单件更换无需拆卸缸盖总成，按GB/T 2879沟槽标准配装的开放型沟槽可实现现场快速换装。

On road paving and site leveling jobs, excavators and loaders subject the piston rod seals of boom, arm and bucket cylinders to both high-frequency reciprocation and impact loads. Hydraulic system pressure at construction sites fluctuates frequently in the 5~25MPa range; conventional lip seals tend to momentarily separate from the rod at pressure spikes, allowing hydraulic oil to seep along the rod surface. The rod Y-type oil seal R08 counters this through its self-energizing lip — when system pressure rises, pressurized oil enters the lip root forcing the lip further open against the rod; the higher the pressure, the tighter the seal. When pressure drops, the lip elastically retracts to maintain low-pressure sealing, keeping the sealing interface closed throughout the entire pressure cycle. Construction dust concentration is high; dust carried by the extending piston rod passes between the wiper and primary seal on retraction. As the primary rod seal, the Y-type seal's polyurethane material offers 3~5 times the wear resistance of NBR, maintaining lip integrity without rapid plowing even with trace dust adhering to the rod. Construction equipment has short maintenance windows; the Y-type seal can be replaced individually without disassembling the cylinder head assembly, and the open groove built to GB/T 2879 standard enables fast field replacement.

开采工程 Mining Engineering

矿用挖掘机与破碎锤在露天采场作业时，液压缸不仅承受矿石冲击带来的瞬间压力尖峰可达30MPa以上，活塞杆还长期暴露在岩粉与水汽混合的强磨蚀环境中。杆面一旦被矿粉颗粒拉伤出现轴向划痕，普通橡胶油封唇口会被划痕边缘反复切割，数周内即发展为漏油通道。轴用Y型油封R08的聚氨酯唇口具备抗切割与抗挤出双重特性——硬度达邵氏A93±2的聚氨酯在30MPa高压下唇口根部不会被挤入杆与导向套之间的配合间隙，面对杆面轻微划痕时唇口弹性可跨越缺陷维持贴合而不被割裂。矿山昼夜温差大，Y型油封工作温度范围-40℃~+80℃覆盖矿区全年工况，低温启动时聚氨酯仍保持弹性不脆化，夏季连续作业时唇口摩擦热通过杆面快速导出。矿山设备连续作业时间长，Y型油封配合防尘圈与导向环组成完整杆密封系统，可将油缸大修间隔延长至普通橡胶密封的1.5倍以上，显著降低矿山设备的停机维护成本。

When mining excavators and breakers operate in open pits, hydraulic cylinders not only withstand instantaneous pressure spikes above 30MPa from ore impact, but the piston rods are also long-term exposed to a highly abrasive environment of mixed rock powder and moisture. Once the rod surface is scored by mineral particles with axial scratches, conventional rubber seal lips are repeatedly cut by the scratch edges, developing into leak channels within weeks. The rod Y-type oil seal R08's polyurethane lip offers both cut resistance and extrusion resistance — polyurethane with Shore A 93±2 hardness prevents the lip root from being extruded into the clearance between rod and guide sleeve at 30MPa; when facing minor rod scratches, the lip elasticity bridges the defects to maintain contact without being torn. Mining areas have large day-night temperature swings; the Y-type seal's -40℃~+80℃ range covers year-round mining conditions — polyurethane remains elastic without embrittlement during cold starts, and lip friction heat dissipates quickly through the rod during continuous summer operation. Mining equipment runs long continuous shifts; the Y-type seal combined with wiper and guide ring forms a complete rod sealing system, extending cylinder overhaul intervals to over 1.5 times that of conventional rubber seals, significantly reducing downtime maintenance costs for mining equipment.

往复速度≤0.5m/s，压力≤40MPa，温度-40~+80℃

RECIPROCATING SPEED ≤0.5M/S, PRESSURE ≤40MPA, TEMPERATURE -40~+80℃

挖机Y型油封R08应用于：施工工程 Construction Engineering、开采工程 Mining Engineering

Application Scenarios for Excavator Y-type Oil Seal R08: 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

在广州轴用Y型油封R08的安装中，选用产品专用的安装工具，避免沟槽金属锐边将手指划伤。安装前，清洗沟槽，在唇部涂一些润滑油，不能强硬敲入。要先将广州Y型油封压入孔槽，再逐步彻底、均匀的捋压而入。

说明丨轴用Y型油封R08 使用说明 - 广州东晟油封厂家

轴用Y型油封R08 使用说明

ROD Y-TYPE OIL SEAL R08 · INSTALLATION & MAINTENANCE GUIDE

结构与材质 Structure & Material

轴用Y型油封R08为非对称双唇U型往复密封结构，内唇（动唇）贴合活塞杆、外唇（静唇）压入沟槽，依靠唇口弹性变形形成初始密封力。主体材质为聚氨酯PU，邵氏硬度A93±2，耐磨性为丁腈橡胶的3~5倍，抗挤出性能优异，适用于液压缸活塞杆的单向压力密封，唇口在系统压力作用下产生自封作用——压力越高贴合越紧。

Rod Y-type oil seal R08 adopts an asymmetric double-lip U-profile reciprocating seal structure: the inner lip (dynamic lip) fits the piston rod while the outer lip (static lip) presses into the groove, forming initial sealing force through lip elastic deformation. The main material is polyurethane (PU) with Shore A 93±2 hardness, offering 3~5 times the wear resistance of NBR and excellent extrusion resistance. Designed for single-acting pressure sealing of hydraulic cylinder piston rods, the lip generates a self-energizing effect under system pressure — the higher the pressure, the tighter the fit.

安装要点 Installation Key Points

① 安装方向：Y型油封为单向密封，唇口必须朝向压力腔一侧，装反则系统压力直接顶开唇口导致立即漏油。
② 沟槽要求：按GB/T 2879活塞杆用沟槽标准加工，优先选用开放型沟槽便于现场更换；槽底粗糙度Ra≤3.2μm，槽口圆角R0.3~R0.5mm。
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°~20°并抛光，杆面粗糙度控制在Ra 0.2~0.4μm；唇口翻越螺纹或台阶时必须使用导向套遮盖锐边。
④ 安装工具：使用专用导向套筒推入，禁用螺丝刀、尖锥直接撬动唇口，聚氨酯唇口一旦被割出缺口会在压力下迅速扩展为泄漏通道。
⑤ 润滑：安装时在唇口与杆面涂抹系统液压油，干装启动会造成唇口初期干摩擦烧伤。

① Installation Direction: Y-type seals are single-acting; the lip must face the pressure chamber side. Reversed installation lets system pressure push the lip open, causing immediate leakage.
② Groove Requirements: Machine grooves to GB/T 2879 rod seal standard; prefer open grooves for field replacement. Groove bottom roughness Ra≤3.2μm, groove edge radius R0.3~R0.5mm.
③ Rod Preparation: Remove all burrs, rust and old seal residue before installation. Chamfer rod end at 15°~20° and polish. Control rod surface roughness at Ra 0.2~0.4μm. Use an assembly sleeve to cover sharp edges when the lip must pass threads or steps.
④ Installation Tooling: Push in with a dedicated assembly sleeve. Never pry the lip with screwdrivers or sharp tools — a cut in the polyurethane lip rapidly expands into a leak channel under pressure.
⑤ Lubrication: Apply system hydraulic oil to the lip and rod before installation. Dry assembly causes initial dry-friction lip burn at startup.

工况参数 Operating Parameters

往复速度：≤0.5 m/s（超过0.5m/s唇口温升加剧，高速工况需选用专用结构）
压力：≤40 MPa（间隙大于0.15mm或压力超过25MPa时建议加装挡圈防挤出）
温度范围：-40℃ ~ +80℃（超过80℃聚氨酯强度明显下降）
适配介质：矿物基液压油、乳化液、润滑脂
不推荐介质：磷酸酯系液压油、长期接触水基介质（聚酯型PU遇热水/蒸汽会水解，水基工况需选耐水解聚氨酯）

Reciprocating Speed: ≤0.5 m/s (lip temperature rise intensifies above 0.5m/s; high-speed conditions require dedicated profiles)
Pressure: ≤40 MPa (install a back-up ring against extrusion when clearance exceeds 0.15mm or pressure exceeds 25MPa)
Temperature Range: -40℃ ~ +80℃ (polyurethane strength drops significantly above 80℃)
Compatible Media: Mineral-based hydraulic oils, emulsions, lubricating greases
Not Recommended: Phosphate ester hydraulic fluids, long-term water-based media (polyester PU undergoes hydrolysis in hot water/steam — specify hydrolysis-resistant PU for water-based conditions)

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）：12个月检查一次
· 粉尘/矿山工况：6个月检查一次
· 检查内容：唇口是否有裂纹、根部是否有挤出毛边、杆面是否有轴向拉伤、液压油颗粒污染度是否超标

常见失效与排查：
· 唇口装反 → 压力顶开唇口立即大量漏油，修正方向重装
· 根部挤出撕裂 → 高压下唇口被挤入配合间隙，加装挡圈并修复间隙
· 唇口划伤割口 → 安装时锐边或尖锥割伤，更换油封并使用导向套筒
· 软化发粘 → 水基介质或高温高湿导致水解，更换耐水解材质并排查介质
· 单侧偏磨 → 杆偏心或导向环磨损超差，更换导向环并校正同轴度
· 启动爬行异响 → 干摩擦或润滑不足，检查油位并预润滑唇口

Maintenance Schedule:
· Normal Conditions (clean environment, mineral oil): Inspect every 12 months
· Dusty / Mining Conditions: Inspect every 6 months
· Inspection Items: Lip cracks, root extrusion burrs, axial rod scoring, hydraulic oil particle contamination level

Common Failures & Diagnosis:
· Reversed Installation → Pressure pushes lip open, immediate massive leakage. Correct direction and reinstall.
· Root Extrusion Tearing → Lip extruded into clearance under high pressure. Add back-up ring and repair clearance.
· Lip Scratched or Cut → Sharp edges or pointed tools during installation. Replace seal and use assembly sleeve.
· Softened & Sticky → Hydrolysis from water-based media or hot humid environment. Replace with hydrolysis-resistant material and check media.
· One-Sided Wear → Rod eccentricity or worn guide ring. Replace guide ring and correct coaxiality.
· Startup Stick-Slip Noise → Dry friction or insufficient lubrication. Check oil level and pre-lubricate the lip.