A rotor is a rotating body supported by a bearing. Objects that do not have a rotating shaft, such as optical disks, can be regarded as rotors when rigid connections or additional shafts are used. The rotor of a motor is generally composed of iron core, slip ring and blades. Motor, generator, gas turbine, turbocompressor and other main components that rotate at high speed in power machinery or working machinery.
Extended data:
A, generator components and principle:
The generator is mainly composed of stator, rotor, end cover, brush, frame and bearing. Stator is composed of frame, stator core, winding and other structural components for fixing these components. The rotor consists of rotor core, rotor poles (with magnetic yoke and pole winding), slip rings (also known as copper rings and slip rings), fans and rotating shafts.
The stator and rotor of the generator are connected and assembled through bearings, bases and end covers, so that the rotor can rotate in the stator. A certain excitation current is introduced through the slip ring, so that the rotor becomes a rotating magnetic field. The stator coil moves to cut the magnetic field lines, generating an induced potential, which is led out through the terminal and connected to the loop to generate current.
Because there is an open circuit at the joint between the brush and the rotor, the rotor rotates in a certain direction to generate alternating current, so the circuits such as household circuits are referred to as alternating current for short. The frequency of output current of China power grid is 50 Hz.
Second, the rotor classification:
Typical rotors include turbine rotors, motor rotors, rotors of various pumps and rotors of turbocompressors. When the rotor rotates at a certain speed, it will produce great deformation and cause * * * vibration. The speed that causes vibration is called the critical speed of the rotor.
In engineering, the rotor whose working speed is lower than the first critical speed is called rigid rotor, and the rotor whose working speed is higher than the first critical speed is called flexible rotor.
Because the rotor rotates at high speed, it needs to be balanced. Static balance is mainly used to balance the inertia force of disk rotor. Dynamic balance of rigid rotor can balance inertia force and inertia force couple through universal balancing machine, and eliminate the vibration of rotor on elastic support.
The dynamic balance of flexible rotor is complex, which can be divided into two categories in principle: modal balance method and influence coefficient method.
Baidu encyclopedia-stator
Baidu encyclopedia-rotor