Hoist Cylinder Performance - Test
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机器突然移动,会造成人员伤亡。 机器突然移动或释放气压或油压,可能对机器上或机器附近的人员造成伤害。 在测试和调整任何空气系统或液压系统之前,为防止可能的伤害,执行测试和调整, "概述"部分的程序。 |
- 起动发动机。 以高怠速运转发动机。
- 将举倾操纵杆移到升起位置。 卸载车斗完全升起后,将举倾操纵杆固定到升起位置 5 秒钟。 随后,将卸载车斗完全降到卡车机架上。
- 重复步骤 2,直到液压油的温度高于
38°C (100°F) 。
- 将卸载车斗降到卡车机架上。
- 以高怠速运转发动机。
- 将自卸车斗升到完全升起的位置。 利用秒表测量所需时间。
举倾油缸完全伸出所需时间约为 15 秒。
注: 利用空载车斗和高于
- 将举倾操纵杆移到升起位置。
- 当举倾油缸的一级伸出
305 mm (12 in) 时,将举倾操纵杆移到保持位置。 - 卸载车斗将推动一级缸盖
6.35 mm (0.25 in) ,以达到举倾油缸的二级。 利用秒表记录所需时间。
油缸沉降可接受的时间与举倾油缸内液压油的温度有关。 关于可以接受的时间,请参阅表 1。
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可接受的油缸沉降量 | ||
分 | 机油温度 | 油缸沉降 |
7.0 | |
|
4.1 | |
|
3.0 | |
|
以下情况可使油缸过度沉降:
- 液压油箱和举倾油缸间的管路泄漏
- 控制阀滑阀磨损
- 举倾油缸内的密封磨损
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