When we carry out maintenance of the screw compressor, and sometimes it needs to be open, then do not pay attention this time if it is likely to cause damage to their parts, accessories or even lost. So under normal circumstances demolition work is to be performed by experienced technicians, and strictly observe the following points: 1. Remove the radial bearings, mechanical seals or floating ring seal, the rotor should be slightly raised, in order to avoid strain matched parts. 2. Remove the radial bearing, floating ring seal, after the coupling hub, should be installed and floating ring seal bearing journal site, loaded shaft coupling hub cone section bandaged to protect. 3. After the demolition of the radial bearing, non-transfer or shifting of the rotor disk, to prevent seal damage. 4. Remove the bearings, the sealing parts and lifting the rotor, you must be careful, non-beat and collision compressor manufacturers offer, in order to prevent damage to the parts. 5. aperture stop with the sealing surface is prohibited hammer or pry with iron bars (if desired beat or poking, you must pad with a soft metal), with the machined surface to avoid damage. 6. To smooth lifting, attention inside and outside in all directions, up and down, left and right, front and rear, which are accessible. 7. hanging and placing parts to be reasonable, protective measures must be bundled, safe and stable place to be, when they are not allowed to use any of the impeller rotor support. 8. lifting cylinder must understand, partitions, and other parts of the rotor position and lifting equipment weight, rigging choice should not be less than the diameter of the 10-fold safety factor, rigging and equipment edges, surface contact of the application process skids or soft material good pad. 9. lifting cylinder head should be kept subdivision surface level, or the four corners of the cylinder split equal distance between the surface and not with the guide rod with jam, lifting process, should be careful to observe all relevant parts of the lower decks, the rotor etc. not to follow on from. General use of AC motor drive. 150Kw less power when powered by squirrel-cage induction motor, because of its simple structure, reliable, easy to start, easy maintenance, low prices. However, a small squirrel cage motor starting torque, starting current, due to start compressor is unloaded, full torque starting torque of only about 25 to 30 percent of air compressor manufacturers, so the motor torque small compression not much impact machine, and start-up current is too large will cause a voltage drop and fluctuations in the grid. Of the grid voltage fluctuation demanding area, you can use spiral wound rotor induction motor compressor manufacturers, in order to prevent excessive startup current, but the complexity of the winding starter compressor manufacturers Which is good, the price high, management is not easy, so when the drive power is less than (40 ~ 50) kw compressor to use more squirrel-cage, you have enough power reserves in the grid is still using squirrel cage. Synchronous motors use more common drawback of both asynchronous motor power factor cosa <1, line losses consume a large part of that is no big power, which is very detrimental to the power grid, so when power is greater than 150kw (also some data suggested 400kw) when . Synchronous motor a little something to make invalid current output back to the grid, improve power factor cosa, so cosa = 1, and even become ineffective interest rate generator (current lead, with compensation cosa). Disadvantages synchronous motor is complex and expensive, requiring a higher level of management. Motor driven, for small and medium sized compressor through V-belt drive or direct drive through semi-flexible coupling. Advantages of using a belt drive is higher than the compressor can choose the number of revolutions of the motor, the motor in order to cheap and light weight, the disadvantage is that the belt drive to consume part of the power transmission process. Medium-sized compressor with direct drive motor rigidly connected, or the electric motor mounted directly on the motor compressor crankshaft become suspended. A little something rigid rotor compressor connected doubles as flywheel, the disadvantage is the higher of the required mounting and semi-elastic connection to neutral, though not very strict requirements, but only from the moment of inertia of the motor rotor part about flywheels, compressed machine must be installed in a separate dedicated flywheel. Compressor factory outlets | Liaocheng compressor manufacturers | Qin Wei provided by Air Compressor Co., Ltd., Xianyang Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) strong, credible, Xianyang in Shaanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qin Wei Air and you hand into the brilliant, for a better future!