On the correct use of motor

Article source: Ai Jibai editor: Anhui electric motor

Motor is the electrical energy into mechanical energy of a device, is commonly used to power machinery, widely used in machining, drainage and irrigation machinery, plant protection machinery, threshing machinery, mechanical baking in agricultural production. It is of great significance to use the motor correctly to promote the safety production, prolong the service life of the motor and the auxiliary machinery, and improve the production efficiency.

1 motor drive the selection of the supporting mechanical load is large and small, the work place are not the same, the speed of rotation, the power requirements are not the same, this must be the correct choice of the corresponding matching motor.

1) according to the load to select the suitable power motor. If agricultural machinery has marked mechanical power requirements, directly select the power of motor; if not marked, considering the factors such as power loss in the motor drive and practical work overload, motor power should be than agricultural machinery load slightly larger point, generally does not exceed the load of 10% is appropriate.

2) according to the working environment to choose the appropriate protection mode of the motor. If dry working environment, less dust, can choose ordinary door motor; if the work environment of dust, humidity, can choose the enclosed type motor; if the motor to be submerged in the water, like diving pump, you must choice of sealing type motor.

3) according to the speed required to select the appropriate motor. Agricultural machinery working on the motor has a certain speed requirements, general requirements for the motor speed at 1500 rpm, the speed is moderate, with the speed of motor performance, strong power and efficiency is high, the operation easier and work more relaxed.

4) select the appropriate power of the motor. Agricultural motor applications mostly in rural areas, due to the condition of rural power restrictions, in the choice of motor, electrical supply conditions must be taken into account, choose corresponding to the rated voltage of the DC or AC motor, prevent the DC and AC motor mixed burn out the motor. If the working environment is far from the AC power, should consider the use of DC power supply. Due to the use of AC power is simple, such as no special requirements as far as possible the use of AC power supply.

2 the motor is installed after the choice of the motor to be carried to the work site, should be safe handling, proper installation, to ensure that the use of safety.

1) safety handling motor. Handling and installation motor should pay attention to the safety of persons and motor, motor handling tool requires stable and reliable, in order to avoid injury or damage to the motor, carrying motor to be tied in the rings, or base, don't tie the shaft or end cover, so as not to damage the shaft or bearing.

2) select the appropriate place to install the motor. To facilitate the selection operation in military operation, inspection and maintenance, and is conducive to moisture-proof, waterproof, waterproof location of the bubble and the sun is provided with a motor.

3) determine the connection mode. DC motor wiring is simple, cathode anode, a cathode to anode can be; AC motor nameplate has marked rated voltage and the connection mode of, mainly 220 volt] Y connection method and 380 volts] connected in two, should pay attention to the difference between treated. In order to avoid being unable to start or burned electric motive. AC motor junction box have six terminals, and marked with the number of symbols, to correct use of star connection, or connected in a triangle, if you need to change the motor rotation direction, as long as the three-phase power supply leads to two arbitrary and a change of location can be. Some motor for a variety of reasons, may thread marked unclear, available cell and a small bulb are connected in series, the end is connected to a motor of an arbitrary thread, the other end respectively and the other thread contact, if the light bulb and connected with the battery and lighting of the two threads is a phase.

4) setting safety device. Motor is installed and fixed, in order to ensure that the use of safety, it is necessary to set up a grounding device, connected materials available thickness of 3.5 mm above steel pipe, diameter of 6 mm above the bar, thickness of 4 mm above, section 48 square mm flat steel bar or section not less than 4 square mm steel wire, section and not less than 6 square millimeters of aluminum wire, grounding material vertical buried 2.5 m above ground, and guarantee the grounding wire and the ground floor, the motor of good contact.

3 motor starting motor start to be safe and orderly.

1) do a good job before the inspection work. In front of the starting motor to do the inspection work, such as the power of each phase is good contact, whether it meets the requirements of the fuse, fuses are compaction, starting handle are in the position of the "O", transmission part edge whether people, animals, the motor and the driven agricultural machinery can turn flexibly, bearing lubricating oil, compliance with standards.

2) closing. Do a good job in the examination to determine safety, rapid closing and ensure full contact, after closing if no fault is a few seconds or tens of seconds after the motor can operate normally; such as the discovery of the motor does not turn, starting slowly, the sound is not normal or transmission device, driven by the agricultural machinery has a problem, should immediately pull gate, inspection, troubleshooting and then start.

3) Master sequential start. The compensator starter must first starting hand push to "start" position, then push to "run" position, to avoid burning the boot device or motor. The same motor can not be repeated for several times in a single time, so as to avoid excessive current caused by overheating and damage to the motor.

4 motor maintenance and regular maintenance and maintenance of the motor is an important link to ensure the motor to extend the service life.

1) periodic inspection of motor. Check the insulation of the inner and outer lines of the motor. If it is found that the insulation is not good to do a good job in a timely manner to protect the insulation, if the wire is loose, it should be tight line and reinforcement. Motor if not used for a long time, should be removed for storage in the warehouse, or do cover, ensure that the ventilation, to prevent long exposure to sun and rain damage to the motor.

2) regular dust, lubrication. Every year on the motor shell for 3 ~ 4 times to clear the dust, check the wiring terminal box, pressing, wire is intact, remove the end cover into the clean lubricating oil.

3) regular annual maintenance. Disassemble the motor running parts, scrub clean, clean the bearings with clean gasoline or kerosene, replace the worn parts in time.

5 conclusion in in the process of processing machinery, irrigation and drainage, plant protection, threshing, baking and other agricultural production, how to properly use the motor and the master motor maintenance considerations, not only can effectively reduce the motor operation in the process of failure and delay the farming season, but also improve the operation efficiency and the amount of work, reduce the number of unnecessary trouble, so as to ensure agricultural production smoothly.