793D Off-Highway Truck Hydraulic System Caterpillar


Gear Pump (Hoist, Brake Release, Oil Cooling)

Usage:

793D FDB



图 1g01202898

端部视图

(1) 8 个螺栓的扭矩 ... 222 ± 2.5 N·m (165 ± 2 lb ft)




图 2g01251113

剖面 A-A

(2) 如图所示,组装轴密封件,使弹簧加载件表面彼此相对。

(3) 将环开口装在排放孔上。




图 3g01251144

剖面 B-B

(4) 出口

(5) 压力板必须装在出口侧的斜面上。




图 4g01251112

截面 D-D

(6) 八个螺栓的扭矩 ... 116 ± 6 N·m (86 ± 4 lb ft)

(7) 4 个螺栓的扭矩 ... 227 ± 10 N·m (170 ± 10 lb ft)

从驱动端看,轴的旋转方向是顺时针。

泵为齿轮式泵。

试验台测试要求:进行测试之前,SAE 10W 机油必须在 65° (150°) 下稳定。

齿轮泵的各个剖面具有下列性能技术规格:

驱动端(举倾机构)

全速下试验:

输出 ... 394 L/min (104 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm
输出 ... 382 L/min (101 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm

半速下试验:

输出 ... 189 L/min (50 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 875 rpm
泵的测试转速 ... 920 rpm
输出 ... 174 L/min (46 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 875
泵的测试转速 ... 920 rpm

中间剖面(举倾机构)

全速下试验:

输出 ... 394 L/min (104 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm
输出 ... 382 L/min (101 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm

半速下试验:

输出 ... 189 L/min (50 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 875 rpm
泵的测试转速 ... 920 rpm
输出 ... 174 L/min (46 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 875 rpm
泵的测试转速 ... 920 rpm

盖端部(停车制动器释放)

全速下试验:

输出 ... 117 L/min (31 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm
输出 ... 106 L/min (28 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 1750 rpm
泵的测试转速 ... 1840 rpm

半速下试验:

输出 ... 57 L/min (15 US gpm)
测试压力 ... 690 kPa (100 psi)
发动机的测试转速 ... 875 rpm
泵的测试转速 ... 920 rpm
输出 ... 45 L/min (12 US gpm)
测试压力 ... 6900 kPa (1000 psi)
发动机的测试转速 ... 875 rpm
泵的测试转速 ... 920 rpm

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