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加长臂挖掘机齿轮泵输出流量不足吸不上油的原因

日期:2019-08-05   来源:
  在使用挖掘机的加长臂时,齿轮泵的输出流量不足以吸收油液,导致设备的正常工作受到影响。因此,很多人想知道这里发生了什么,加长臂挖掘机小编总结了这些现象的原因。
  When using the elongated arm of excavator, the output flow of gear pump is insufficient to absorb oil, which affects the normal operation of equipment. Therefore, many people want to know what happened here, and the reason for these phenomena is summarized in the small edition of the extended arm excavator.
  齿轮泵输出流量不够,或齿轮泵不吸油是指齿轮泵在电机驱动下工作,但齿轮泵的排量流量非常小,不能达到额定流量。在液压系统中,气缸的快进速度变慢或油马达的速度变慢,蓄电池的充液速度变慢。蓄能器充液压力增加时间长,控制阀响应慢等故障。
  The output flow of gear pump is insufficient, or the gear pump does not suck oil means that the gear pump works under the drive of motor, but the displacement flow of gear pump is very small and can not reach the rated flow. In hydraulic system, the speed of cylinder or oil motor becomes slower, and the speed of battery filling becomes slower. Accumulator charging pressure increases for a long time, control valve response slow and other faults.
加长臂挖掘机
  加长臂挖掘机齿轮泵输出流量不足以吸油的原因如下:
  The reasons why the output flow of the gear pump of the elongated arm excavator is insufficient to absorb oil are as follows:
  1,注油口过滤器堵塞,导致吸油阻力增加,吸空,这个时候需要删除过滤器清洗,并分析产生的原因和类型的污水,这样不仅可以防止生产齿轮泵吸油是不够的,还可以防止其他故障产生的原因。
  1. The blockage of the filter at the injection port leads to the increase of oil absorption resistance and suction. At this time, it is necessary to remove the filter for cleaning, and to analyze the causes and types of sewage. This can not only prevent the suction of oil in gear pump, but also prevent the causes of other faults.
  2. 齿轮端面与前后盖之间滑动接触面的严重应变导致内部泄漏过大,导致输出流量减少。造成张力的主要原因之一是齿轮装配前(齿廓上)毛刺未被仔细去除,以及操作后的张力接头表面;第二,污垢楔入齿轮端面与泵前后盖之间的滑动间隙中,对配合面产生应变。从图中可以看出,高低压空腔是通过槽孔连接的应变,导致了输出流量的减少,这是很常见的。这个时候应该拆卸齿轮泵,与平面磨削前后盖端面齿轮端面,并去除牙齿上的毛刺形状(但不是倒角)、平面研磨前后盖端面后卸荷槽的大小会改变,应该适当加深和拓宽。
  2. The serious strain of the sliding contact surface between the gear end face and the front and rear cover leads to excessive internal leakage, resulting in reduced output flow. One of the main reasons for the tension is that the burr on the gear profile has not been carefully removed before assembly and the surface of tension joint after operation. Secondly, the dirt wedges into the sliding gap between the gear end face and the front and back cover of the pump, which produces strain on the mating surface. It can be seen from the figure that the strain of the high and low pressure cavity is connected through the groove, which leads to the decrease of the output flow, which is very common. At this time, the gear pump should be disassembled, and the end face of the front and rear cover gear should be grinded with the plane, and the burr shape (but not chamfer) on the teeth should be removed. The size of the unloading groove after the front and rear cover face before and after the plane grinding will change. It should be deepened and broadened appropriately.
  3.的轴行前后的两个轴承孔覆盖不平行(斜)由于贫穷的加工或组装,最终面临的两个齿轮轴偏心磨损,和结束的前后盖拉伸线是相似的,但不是一个完整的圆(扇形圆形表面),导致增加了内部泄漏。此时,治疗方法与上述相同。
  3. Because of poor processing or assembly, the two bearing holes before and after the axle line cover not parallel (oblique). The eccentric wear of the two gear axles is similar to the tension line of the front and rear cover of the end, but it is not a complete circle (sector-shaped circular surface), resulting in increased internal leakage. At this time, the treatment is the same as above.
  4、径向不平衡力导致齿轮轴变形,摩擦泵体腔体,增大径向间隙,导致内部泄漏增加。
  4. Radial unbalanced force causes gear shaft deformation, friction pump body cavity, increase radial clearance, and increase internal leakage.
  5. 油温过高,温升降低了油的粘度,而内漏的增加降低了原油的产量。找出造成高油温的原因,并采取相应的措施。在高中压齿轮泵上,应检查船首密封圈是否损坏。
  5. The oil temperature is too high, the temperature rise reduces the oil viscosity, and the increase of internal leakage reduces the crude oil production. Find out the cause of high oil temperature and take corresponding measures. On high and medium pressure gear pumps, check whether the bow seal ring is damaged.
  6. 如果选择的油粘度过高或过低,则粘度过高会增加吸油阻力;粘度过低,泄漏量大。应根据油泵的使用说明书选用粘度适宜的油。
  6. If the selected oil viscosity is too high or too low, the excessive viscosity will increase the oil absorption resistance; if the viscosity is too low, the leakage will be large. Oil with suitable viscosity should be selected according to the instructions for the use of oil pumps.
  7、CB - B齿轮泵是非正负压泵(除非指定顺序),当泵方向不对时,吸油量或流量非常小,此时应检查电机转向。
  7. CB-B gear pump is a non-positive and negative pressure pump (unless specified in order). When the direction of the pump is not right, the oil absorption or flow rate is very small. At this time, the motor steering should be checked.
  8. 拆卸和修理后,泵体反向安装。此时,压力室P的压力油沿泵体卸荷槽e流向吸油区O,导致局部连接短,流量大大减少,泵体不能倒装。
  8. After disassembly and repair, the pump body is installed in reverse direction. At this time, the pressure oil of pressure chamber P flows to the oil suction zone O along the unloading groove e e of the pump body, resulting in short local connection, greatly reduced flow, and the pump body can not be inverted.
  9、电机转速不够,CB - B齿轮泵额定输出流量按电机转速1450rpm计算,低于此数,流量减少。
  9. The motor speed is not enough. The rated output flow of CB-B gear pump is calculated according to the motor speed of 1450 rpm, which is lower than that, and the flow rate decreases.
  10. 泵轴坏了,电机在表面驱动泵,但根本没有上油。此时应更换泵轴。
  10. The pump shaft is broken. The motor drives the pump on the surface, but there is no oil at all. At this time, the pump shaft should be replaced.
  以上是加长臂挖掘机齿轮泵输出流量不足吸收产油的原因,将有助于您解决这个问题。
  Above is the reason why the output flow of gear pump of elongated arm excavator is insufficient to absorb oil production, which will help you to solve this problem.

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