CN210296822U - Large-scale transmission slip ring structure resistant to thermal stress damage - Google Patents
Large-scale transmission slip ring structure resistant to thermal stress damage Download PDFInfo
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- CN210296822U CN210296822U CN201920614655.6U CN201920614655U CN210296822U CN 210296822 U CN210296822 U CN 210296822U CN 201920614655 U CN201920614655 U CN 201920614655U CN 210296822 U CN210296822 U CN 210296822U
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Abstract
The utility model discloses a large-scale transmission slip ring structure resisting thermal stress damage, which comprises a rotor and a stator, wherein the top of the rotor is provided with an outer ring footstock, and the outer ring footstock is hung on a movable cover through a compression screw; a first clamping groove is formed in the top surface of the outer ring top seat, and a first elastic washer is arranged in the first clamping groove; the stator top sets up the base, the base top fixed washer mount pad, set up the second draw-in groove at the top surface of washer mount pad, place the second elastic gasket in the second draw-in groove. The utility model discloses an elastic packing ring's elastic expansion compensates the expend with heat and contract with cold size difference between metal and non-metal, in the inside thermal stress of release sliding ring, the non-metallic working of plastics on the protection sliding ring stator rotor that can be fine to its influence of avoiding vibrations and assaulting.
Description
Technical Field
The invention relates to a power slip ring technology, in particular to a large power transmission slip ring structure resistant to thermal stress damage.
Background
The existing electric slip ring is generally small in size, the requirement on temperature difference change of a working environment is relatively low, and the size change of an internal structural component caused by the influence of expansion with heat and contraction with cold is not obvious, so that the problem of internal thermal stress is basically not considered in the design of the slip ring. However, the internal height of the oil-immersed power transmission slip ring is 1.2m, and the actual use environment temperature is generally-40-60 ℃. Because the materials of the inner stator and the rotor main body are epoxy nonmetal (the thermal expansion coefficient is 67.1 multiplied by 10)-6) The external frame material is metal stainless steel (thermal expansion coefficient 17.3 multiplied by 10)-6) If the assembly is carried out at 10 ℃, when the slip ring operates to the highest working temperature, the nonmetal parts on the stator and the rotor need to be compressed by 2.4mm, and the nonmetal epoxy parts are likely to be directly fractured; at the lowest working temperature, 2.4mm installation gaps exist on the stator rotor ring and the rotor ring respectively, the anti-seismic performance of the slip ring is greatly influenced, and the nonmetal epoxy parts are damaged by collision in vibration. Therefore, the design of the large oil-immersed power transmission slip ring needs to consider the problem of thermal stress.
Disclosure of Invention
The invention aims to provide a large power transmission slip ring structure resistant to thermal stress damage.
The technical solution for realizing the purpose of the invention is as follows: a large-scale power transmission slip ring structure resistant to thermal stress damage comprises a rotor and a stator, wherein the top of the rotor is provided with an outer ring footstock, and the outer ring footstock is hung on a movable cover through a compression screw; a first clamping groove is formed in the top surface of the outer ring top seat, and a first elastic washer is arranged in the first clamping groove; the top of the stator is sequentially provided with a pad seat and a gasket mounting seat, the top surface of the gasket mounting seat is provided with a second clamping groove, and a second elastic gasket is placed in the second clamping groove.
Compared with the prior art, the invention has the remarkable advantages that: the elastic washers are respectively preassembled on the slip ring stator and rotor rings, the size difference of expansion with heat and contraction with cold between metal and nonmetal is compensated through the elastic expansion of the elastic washers, and the nonmetal plastic parts on the slip ring stator and rotor can be well protected while the thermal stress in the slip ring is released, so that the nonmetal plastic parts are prevented from being influenced by vibration impact.
Drawings
Fig. 1 is a cross-sectional view of a large power transmission slip ring according to the invention.
Fig. 2 is a partially enlarged view of a large power transmission slip ring according to the invention.
Detailed Description
The scheme of the invention is further described below by combining the drawings and the specific embodiment, in order to facilitate the understanding of the scheme, the design for resisting thermal stress damage is carried out on the basis of the slip ring disclosed by 201721895477.6, and the working slip ring is prevented from being cracked due to the influence of expansion caused by heat and contraction caused by cold under the environment of large temperature difference, but the design concept of the invention is also applicable to other slip ring structures.
As shown in fig. 1, the slip ring is a metal member from the base 13 to the slewing bearing 12, the supporting bracket 10, the self-aligning ball bearing 9, the movable cover 1 and the outer housing 11, and is hard-connected with each other. The position of the movable cover 1 is determined by the expansion and contraction of the metal piece. In addition, since the deep groove ball bearing 6 is hard-connected to the movable cover 1, the position of the deep groove ball bearing 6 is also determined by the thermal expansion and contraction of the metal member.
On the other hand, since the main body components are epoxy resin from the base 13 to the top of the rotor 14 and the stator 15, the height of the top of the rotor 14 and the stator 15 is determined by the expansion and contraction of the epoxy resin.
Because the two height positions are determined in different modes, namely one is determined by the expansion and contraction of metal and the other is determined by the expansion and contraction of epoxy resin, the two height positions cannot be directly connected with each other in a hard mode, and otherwise, the epoxy resin part is extruded under the thermal stress to generate cracks.
But simultaneously, also can not let these two interfaces that have the difference in height too soft connection, because can lead to the structure too loose like this, the shock resistance is not good, and epoxy part can be because the top lacks certain restraint and can be overturned under the vibration environment, finally leads to the part to shake and split.
Therefore, the spring energy storage gasket is arranged at the interface of the invention, so that enough rigidity can be provided for the structure without hard connection, and the integrity and the shock resistance of the structure are ensured, and the specific scheme is shown in an enlarged view in fig. 2. The large power transmission slip ring structure resisting thermal stress damage comprises a rotor 14 and a stator 15, wherein the top of the rotor 14 is provided with an outer ring footstock 2, and the outer ring footstock 2 is suspended on a movable cover 1 through a compression screw 3; a first clamping groove is formed in the top surface of the outer ring top seat 2, and a first elastic washer 7 is arranged in the first clamping groove; the top of the stator 15 is sequentially provided with a cushion seat 4 and a gasket mounting seat 5, the top surface of the gasket mounting seat 5 is provided with a second clamping groove, and a second elastic gasket 8 is placed in the second clamping groove.
According to the invention, a circle of elastic gasket is clamped between the rotor 14 and the movable cover 1, a circle of elastic gasket is arranged between the stator 15 and the deep groove ball bearing 6, the size difference between the metal and the nonmetal in expansion and contraction is compensated by the elastic expansion of the first elastic gasket 7 and the second elastic gasket 8, the elastic gasket is pressed a little bit when the temperature is high, and the elastic gasket is pressed a little bit when the temperature is low, but the elastic gasket is in a safe range. In this way, the slip ring releases the thermal stress concentration of the inner rotor 14 and the stator 15, so that the non-metal part is not damaged by the heat expansion, and the whole structure of the slip ring is not loosened by the cold contraction.
In consideration of the installation space of the elastic gasket between the ring top seat 2 and the movable cover 1 and the shock resistance of the sliding ring, in some embodiments, the compression screw 3 is provided with a step, the compression screw 3 penetrates through the installation hole of the outer ring top seat 2, the outer ring top seat 2 is sleeved outside the step, and the outer ring top seat 2 is ensured to be suspended on the movable cover 1.
Because the elastic expansion range of the spring energy storage sealing ring is large, and the elasticity is moderate, in some embodiments, the spring energy storage sealing ring is selected as the first elastic gasket 7 and the second elastic gasket 8, so that the nonmetal epoxy part is not cracked under high temperature, and the stator and rotor ring is free of assembly gaps under low temperature. Simultaneously, the rubber coating of spring energy storage sealing washer can also play damping effect, avoids external impact to cause the influence to non-metallic member.
As a specific implementation, the invention takes the spring energy storage sealing ring produced by Saint gobain, Guangzhou as an example. The sealing ring is internally reinforced by a spring, the outer coating layer is made of polytetrafluoroethylene, the sealing ring is oil-resistant and ageing-resistant and has moderate rigidity and damping characteristics, and when the thermal stress in the slip ring is released, the non-metal plastic part on the stator and the rotor of the slip ring can be well protected so as to avoid the influence of vibration impact.
In view of structural stability, in some embodiments, the pad 4 is fixed to the top of the stator 15 by screws. In some embodiments, the gasket mount 5 is fixed to the top of the shoe 4 by screws.
Claims (5)
1. A large-scale power transmission slip ring structure resistant to thermal stress damage is characterized by comprising a rotor (14) and a stator (15), wherein the top of the rotor (14) is provided with an outer ring footstock (2), and the outer ring footstock (2) is hung on a movable cover (1) through a compression screw (3); a first clamping groove is formed in the top surface of the outer ring top seat (2), and a first elastic gasket (7) is arranged in the first clamping groove; stator (15) top sets gradually pad seat (4) and packing ring mount pad (5), sets up second draw-in groove at the top surface of packing ring mount pad (5), place second elastic washer (8) in the second draw-in groove.
2. The large power transmission slip ring structure resistant to thermal stress damage according to claim 1, wherein a step is arranged on the compression screw (3), the compression screw (3) penetrates through the mounting hole of the outer ring top seat (2), and the outer ring top seat (2) is sleeved outside the step.
3. The large power transmission slip ring structure resistant to thermal stress damages according to claim 1, characterized in that the first and second elastic washers (7, 8) are spring energy storing sealing rings.
4. Large power transmission slip ring structure against thermal stress damages according to claim 1, characterized in that the pad (4) is fixed on top of the stator (15) by screws.
5. Large power transmission slip ring structure against thermal stress failure according to claim 1, characterized in that the washer mount (5) is fixed on top of the pad (4) by screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614655.6U CN210296822U (en) | 2019-04-30 | 2019-04-30 | Large-scale transmission slip ring structure resistant to thermal stress damage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920614655.6U CN210296822U (en) | 2019-04-30 | 2019-04-30 | Large-scale transmission slip ring structure resistant to thermal stress damage |
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| CN210296822U true CN210296822U (en) | 2020-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011149A (en) * | 2019-04-30 | 2019-07-12 | 扬州海通电子科技有限公司 | A kind of large-scale power transmission sliding ring structure that thermal stress resistance destroys |
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2019
- 2019-04-30 CN CN201920614655.6U patent/CN210296822U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011149A (en) * | 2019-04-30 | 2019-07-12 | 扬州海通电子科技有限公司 | A kind of large-scale power transmission sliding ring structure that thermal stress resistance destroys |
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