Large power transmission slip ring structure resistant to thermal stress damage
A thermal stress, large-scale technology, applied in the direction of circuits, current collectors, electrical components, etc., can solve problems such as collision damage of non-metallic epoxy parts, affecting the anti-seismic performance of slip rings, etc.
Pending Publication Date: 2019-07-12
扬州海通电子科技有限公司
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Problems solved by technology
Since the internal stator and rotor main body materials are epoxy non-metallic (thermal expansion coefficient 67.1×10 -6 ), the external frame material is metal stainless steel (thermal expansion coefficient 17.3×10 -6 ), assuming that it is assembled at 10°C, when the slip ring runs to the highest operating temperature, the non-metallic parts on the stator and rotor need to be compressed by 2.4mm, and it is very likely that the non-metallic epoxy parts will be directly crushed; at the lowest operating temperature, the stator There will be a 2.4mm installation gap on each of the rotor rings, which will greatly affect the anti-seismic performance of the slip ring, resulting in damage to the non-metallic epoxy parts due to collision during vibration
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[0008] The scheme of the present invention is further described below in conjunction with the accompanying drawings and specific examples. In order to facilitate the understanding of the scheme, the thermal stress damage resistance design is carried out on the basis of the slip ring disclosed in 201721895477.6, so as to prevent non-metallic factors inside the slip ring when working in a large temperature difference environment. The impact of thermal expansion and contraction results in brittle fracture under pressure, but the design concept of the present invention is also applicable to other slip ring structures.
[0009] Such as figure 1 As shown, the slip ring starts from the base 13, to the slewing bearing 12, the support frame 10, the self-aligning ball bearing 9, the moving cover 1, and then to the outer casing 11, all of which are metal parts, and they are hard-connected. Therefore the position of moving cover 1 is determined by thermal expansion and contraction of meta...
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The invention discloses a large power transmission slip ring structure resistant to thermal stress damage. The large power transmission slip ring structure comprises a rotor and a stator, wherein an outer ring top seat is arranged on the top of the rotor, and is suspended from a movable cover by a pressing screw; a first engagement slot is disposed on the top surface of the outer ring top seat; afirst elastic washer is disposed in the first engagement slot; a pedestal is disposed on the top of the stator; a washer mounting base is fixed to the top of the pedestal; a second engagement slot isdisposed on the top surface of the washer mounting base; and a second elastic washer is placed in the second engagement slot. The large power transmission slip ring structure compensates for a difference in thermal expansion and contraction between the metal and the non-metal by the elastic expansion and contraction of the elastic washers, and can protect the non-metallic plastic components on thestator and the rotor of the slip ring while releasing the thermal stress in the slip ring in order to protect the non-metallic plastic components against vibration shocks.
Description
technical field [0001] The invention relates to electric power slip ring technology, in particular to a large-scale power transmission slip ring structure resistant to thermal stress damage. Background technique [0002] Existing electric slip rings are generally small in size, and require relatively low temperature changes in the working environment, and the dimensional changes of the internal structural parts caused by thermal expansion and contraction are not obvious, so the internal thermal stress is basically not considered in the slip ring design. However, the internal height of the oil-immersed slip ring is 1.2m, and the actual operating environment temperature is generally -40~60°C. Since the internal stator and rotor main body materials are epoxy non-metallic (thermal expansion coefficient 67.1×10 -6 ), the external frame material is metal stainless steel (thermal expansion coefficient 17.3×10 -6 ), assuming that it is assembled at 10°C, when the slip ring runs to...
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IPC IPC(8): H01R39/08
CPCH01R39/08
Inventor 邹天恺俞力峰沙旭南吴桂才
Owner 扬州海通电子科技有限公司