Electromagnetic turning gear
An electromagnetic disk and electromagnetic force technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of weight, large volume, unfavorable space utilization for ships, complex structure, etc., and achieve simplified cranking device and compact structure layout form, the effect of avoiding misuse
Pending Publication Date: 2021-09-17
SHANGHAI MARINE EQUIP RES INST
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Problems solved by technology
[0006] Manual cranking requires human cooperation. With the improvement of automation level and needs, this cranking method has become obsolete; the main problems of hydraulic cranking and electric cranking are: 1. The structure is complex and needs to be configured as an independent device; 2. , The weight and volume are too large, which is not conducive to the utilization of marine space; 3. It needs to be supplied with lubricating oil. With the development of the unit to the electromagnetic bearing, the supply of lubricating oil restricts the simplification and miniaturization of the system
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[0021] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0022] Such as Figure 4 As shown, the electromagnetic disk turning device of the present invention includes a rotor 1, an annulus 2, an iron core 3, a coil, and a control device.
[0023] An appropriate amount of iron core 3 is installed inside the ring 2, and an appropriate amount of coil is wound around the iron core 3, and the coil is energized to generate electromagnetic force to push the rotor to rotate. In order to make the rotor rotate in the required direction, the iron core cannot be energized at the same time , it is necessary to sequentially output electromagnetic force according to a certain logic sequence to drive the rotor to rotate.
[0024] In the preferred embodiment of the present invention, 5 iron cores 3 are adopted, and the temperature between every two iron cores 3 is 72°C. In the control device, 5 independent intermediate relays...
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The invention relates to an electromagnetic turning gear, comprising a plurality of electromagnetic coils which are evenly arranged in the circumferential direction of the outer circumference of a steam turbine rotor and connected with corresponding intermediate relays in a control device, and used for generating electromagnetic force to push the steam turbine rotor to rotate after the corresponding intermediate relays are sequentially electrified through logic control. The electromagnetic turning gear is designed to be of a nested structure and is installed on the outer circle of the rotor. Meanwhile, the compact structure arrangement form is beneficial to the miniaturization design of a rotating machine. The electromagnetic force is creatively used for unit turning work, the turning device can be simplified, the unit and a system are helped to omit a lubricating oil system, and assistance is provided for development of all electricity.
Description
technical field [0001] The invention relates to a turning device of a steam turbine, in particular to an electromagnetic turning device Background technique [0002] Before starting and after stopping the steam turbine, in order to avoid the bending and deformation of the rotor, it is necessary to carry out cranking work. There are three types of barring devices for steam turbines: manual, electric and hydraulic. [0003] The oldest marine steam turbines generally use manual barring, which requires manual turning of a specially designed barring handle to rotate the steam turbine rotor through a mechanical mechanism composed of connecting rods and pawls. Such as figure 1 shown. The structure of the manual barring device is relatively complicated, and the handle needs to be turned manually. It is difficult to realize the uniform rotation of the rotor. The torque that can be driven is limited by manpower. It is a very primitive barring method. [0004] With the development ...
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IPC IPC(8): F01D25/36
CPCF01D25/36
Inventor 许涛王晗李典来周琴周云瑞刘桃宏
Owner SHANGHAI MARINE EQUIP RES INST