秒速快3Shenyang German Machine Hydralic Transmission Machinery Co., Ltd.
Address：No. 14 Shen Da Road, Shenyang flood diversion area
Maintenance of GCH104-47A coupler
Maintenance contents include the overall maintenance of equipment, pipeline inspection, replacement of vulnerable parts, equipment spare parts replacement and installation and commissioning projects
Comparison between coupler and inverter
Without considering the obvious advantages of the hydraulic coupling in easy maintenance and low price, a typical 1500kW fan is taken as the example of the variable speed drive, such as hydraulic coupling = frequency converter + air conditioning system + filter + lubricating oil station and hydraulic oil station + gear box (driving feed pump)。 The role of frequency converter is mainly reflected in the speed control link, and hydraulic coupling in soft start, speed control, improve the whole shaft torsion transmission, routine maintenance and other links are trustworthy。 The details are as follows:
1, hydraulic coupling price is generally lower than the frequency converter more than 20% (according to power, voltage), the larger power only inverter system price of 50-70%.
2, the peak torque generated by the inverter may damage the flexible couplings and even the machine.
3, frequency converter because the motor directly drives the machine, so it is necessary to choose the motor than the actual motor power, in order to help achieve the smooth start。
High order 4, inverter output will reduce the efficiency of the motor, increasing heating。 In order to heat dissipation, the motor needs to be enlarged or equipped with cooling fans。 The heat dissipation function of the motor is proportional to the speed of the motor。 The motor is designed to rotate at constant speed when the hydraulic coupling is used。
5, inverter can not provide hydraulic coupling without load starting, isolation shafting vibration and other characteristics.
6. The wave generated by the inverter may interfere with the main power supply. When starting, the pulse may affect the other electronic systems connected to the main power supply (PLC computer, etc.)
7。 The filter can prevent the pulse of the inverter starting, but the filter is very expensive and will reduce the efficiency of the inverter。
8, the frequency converter and the voltage stability requirements of the power is very high, in case of typhoon or lightning caused abnormal power, it is prone to failure.
9, inverter temperature and humidity requirements are also very high, need to be placed in air-conditioned clean room, this expenditure is also considerable, and may even need alternate air conditioning system, and the power consumption of the air conditioning system itself can not be ignored.
10, the principle of frequency converter determines its structure is much more complex than the hydraulic coupling, resulting in its reliability is far lower than the hydraulic coupling。
11, frequency converter failure, most of the on-site personnel can not be ruled out, must contact the supplier professional personnel to solve, and its parts are expensive, no substitute; hydraulic coupling is simple mechanical device, easy maintenance, parts cheap.
12, the development of electronic parts change rapidly, after several years may not be able to purchase inverter parts (from the update of computer CPU can be seen quickly); hydraulic coupler spare parts can be lifelong supply.
13, the use of hydraulic coupler saves installation space; converter needs additional space to put transformer, air conditioning, wave filter and other auxiliary parts。
14, hydraulic coupling integrated growth, lubrication system, speed and other functions in one; and the inverter can not be driven by the first mechanical (pump or fan) higher than the motor speed operation, the need for additional purchase and installation of lubricating oil.