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液压油泵

意大利Marzocchi马祖奇双联齿轮泵GHPA2-D-6+GHPP2-D-6 GHP1A-D-6

2026年04月21日 液压油泵 游览量:递增失败!

意大利Marzocchi马祖奇双联齿轮泵GHPA2-D-6+GHPP2-D-6 GHP1A-D-6

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GHPA2-D-6 是一款 小排量、超高压、外啮合定量齿轮泵,专为 中高压精密液压系统 设计,结构紧凑、效率高、抗污染能力强,常用于工业机械、小型动力单元及双回路液压系统。

一、型号完整释义

GHPA2 - D - 6

  • GHPA2:产品系列 — 高压双联泵前泵系列(2A 尺寸组)
  • D:安装形式 — 标准 4 螺栓法兰安装(SAE A 标准)
  • 6:规格代码 — 对应理论排量 4.5 cm³/rev (mL/rev)(非直接排量值)

二、核心技术参数

  • 理论排量:4.5 mL/rev (cc/rev)
  • 压力等级连续工作压力 (P1):28.0 MPa (280 bar)间歇工作压力 (P2):29.5 MPa (295 bar)峰值压力 (P3):31.0 MPa (310 bar)
  • 转速范围最低转速:600 rpm额定转速:1500–3000 rpm最高转速:4000 rpm
  • 理论流量@1500 rpm:6.4 L/min@3000 rpm:12.8 L/min
  • 容积效率:≥93%(额定压力、1500 rpm)
  • 机械效率:≥90%
  • 适用介质:矿物型液压油(L-HM32/46/68)、合成液压油
  • 油液粘度:15–60 mm²/s (cSt),最佳 25–40 mm²/s
  • 温度范围:-20°C 至 +80°C(密封 NBR);可选高温至 120°C
  • 材质泵体:高强度铝合金(压铸,轻量化、散热佳)法兰 / 端盖:球墨铸铁(高压承载)齿轮 / 轴:渗碳淬火合金钢(HRC 58–62,耐磨、高精度)轴承 / 轴套:粉末冶金 + 高磷青铜(自润滑、高压)密封:机械密封 (G 型) + 骨架油封(耐高压、防泄漏)
  • 安装:SAE A 4 螺栓法兰
  • 轴伸:平键轴(标准直径)
  • 油口:进 / 出油 G3/8" 或 SAE #8 / #10(内螺纹)
  • 重量:≈1.2 kg

三、结构与工作原理

1. 核心结构

  • 铝合金泵体 + 铸铁端盖:高压强度与轻量化结合
  • 高精度齿轮副:渐开线齿形,低脉动、低噪音、高效率
  • 轴向间隙自动补偿:浮动轴套 / 侧板设计,高压下自动补偿磨损,维持高效率
  • 双重轴封:机械密封主密封,骨架油封辅助防漏
  • 法兰定位:高刚性安装,保证同轴度

2. 工作原理

  1. 吸油:齿轮旋转,吸油腔容积增大形成真空,油液进入齿槽
  2. 压油:齿轮啮合,压油腔容积减小,油液被挤压输出,建立高压
  3. 定量特性:排量固定,流量与转速严格成正比(Q = 排量 × 转速 ÷ 1000)

四、性能特点

  • 超高压小排量:280 bar 连续压力,4.5 cc 小排量,精准高压供油
  • 高效持久:轴向补偿设计,容积效率≥93%,寿命长
  • 低噪低脉动:精密齿轮、缓冲油口,噪音 ≤72 dB(A)
  • 结构紧凑:铝合金 + 铸铁组合,重量轻、安装空间小
  • 互换性强:标准法兰 / 油口 / 轴伸,可与同系列泵直接替换
  • 双联组合:可与 GHPP2 系列后泵串联成双联泵,实现双路独立供油

五、典型应用场景

  • 工业机械:注塑机、液压夹具、机床润滑 / 夹紧系统
  • 小型动力单元:高空作业平台、升降平台、小型液压站
  • 工程机械:微型挖掘机、滑移装载机辅助液压系统
  • 车辆液压:叉车转向 / 起升双回路、自卸车液压系统
  • 农业机械:拖拉机液压提升、播种机精准控制
  • 测试设备:液压试验台、压力测控系统

六、安装与使用要点

  • 同轴度:泵与电机联轴器同轴度 ≤0.05 mm,用弹性联轴器
  • 转向:顺时针(轴端视),禁止反转
  • 吸油:进油配 ≤25 μm 过滤器,管路短、粗、无漏气
  • 压力保护:系统必须装溢流阀,限制压力 ≤280 bar
  • 排气:启动前注油、手动盘轴,排除空气
  • 磨合期:空载运行 10 分钟,逐步升压至额定

七、常见故障与排除

  • 压力不足:进油漏气、过滤器堵、密封损坏、轴向补偿失效 → 查漏气、换滤芯、检修密封 / 补偿机构
  • 流量偏低:转速过低、油粘度过高、内泄增大 → 调转速、换油、检修磨损件
  • 噪音 / 振动大:吸空、同轴度差、轴承坏 → 查吸油、校正同轴度、换轴承
  • 轴封漏油:密封老化、安装不当、轴磨损 → 更换机械密封、规范安装

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