螺杆泵的管理
Screw Management
1 起动
A start
螺杆泵应在吸排停止阀全开的情况下起动，以防过载或吸空。
Screw pump suction stop valve should be fully open the case of start, to prevent overload or suck air.
螺杆泵虽然具有干吸能力，但是必须防止干转，以免擦伤工作表面。
Screw while having dry absorption capacity, but it must be to prevent the stem turn, so as not to scratch the surface of the work.
假如泵需要在油温很低或粘度很高的情况下起动，应在吸排阀和旁通阀全开的情况下起动，让泵起动时的负荷低，直到原动机达到额定转速时，再将旁通阀逐渐关闭。
If the pump requires oil temperature is low or very high viscosity of the case of start, should be suction valve and bypass valve fully open the case of starting, so that the minimum load when the pumps start until the prime mover to achieve rated speed, the re - bypass valve will gradually close.
当旁通阀开启时，液体是在有节流的情况下在泵中不断循环流动的，而循环的油量越多，循环的时间越长，液体的发热也就越严重，甚至使泵因高温变形而损坏，必须引起注意。
When the bypass valve is opened, the liquid is in a case of cutting expenditure in the pump constantly circulating, while the fuel cycle more the longer the cycle, the liquid heating is also more serious, and even the pump because of high-temperature deformation and damage, requires attention.
2 运转
2 running
螺杆泵必须按既定的方向运转，以产生一定的吸排。
Screw must be in accordance with established direction of operation, to generate a certain degree of suction.
泵工作时，应注意检查压力、温度和机械轴封的工作。对轴封应该允许有微量的泄漏，如泄漏量不超过20-30秒/滴，则认为正常。假如泵在工作时产生噪音，这往往是因油温太低，油液粘度太高，油液中进入空气，联轴节失中或泵过度磨损等原因引起。
Pumps work, should pay attention to check the pressure, temperature and mechanical seals work. On the seal should be allowed to have trace amounts of leakage, such as the leakage rate of no more than 20-30 seconds / drop is considered to be normal. If the pump noise at work, this is often due to low oil temperature, oil viscosity is too high, the oil into the air, or pump coupling loss causes such as excessive wear and tear.
3 停车
3 Parking
泵停车时，应先关闭排出停止阀，并待泵完全停转后关闭吸入停止阀。
Pump stop, they would first close the discharge stop valve, and switch to a complete halt until pump suction stop valve was closed.
4 螺杆泵因工作螺杆长度较大，刚性较差，容易引起弯曲，造成工作失常。对轴系的连接必须很好对中；对中工作好是在安装定位后进行，以免管路牵连造成变形；连接管路时应独立固定，尽可能减少对泵的牵连等。此外，备用螺杆，在保存时好采用悬吊固定的方法，避免因放置不平而造成的变形公元前三世纪，阿基米德发明的螺旋杆，可以平稳连续地将水提至几米高处，其原理仍为现代螺杆泵所利用。
4 screw length of the screw because of work large, less rigid, easily lead to bend, resulting in the work of disorders. The connection of the shaft must be a very good pair; right to work is best conducted after the installation position to avoid distortion caused by pipeline involved; connecting pipe should be independently fixed, as far as possible and so reduce the pump implicated. In addition, spare screw, when you save the best method of using a fixed suspension to avoid distortion caused by uneven placing the third century BC, Archimedes invented the screw rod can be smooth continuously raised to the water several meters high Department, its principle is still used by modern pumps.
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