Shaft structure for anti-fatigue circuit breaker

Abstract

The utility model discloses a kind of shaft structures for fatigue-resistant circuit breaker, including output shaft main body, the output shaft main body outside is provided with reinforcing component, the reinforcing component includes the coating one being arranged in the output shaft main body outside, the coating one is made of Ni60A+WC composite material, the coating one outside is provided with coating two, the coating two is made of diamond-like carbon material, the output shaft main body outside is provided with several reinforcing bands, the reinforcing band is prepared using TiN material, the output shaft main body middle position is provided with through hole, the through hole inside is fixedly connected with support frame, the output shaft main body and support frame are made using 17-4PH stainless steel material, the coating one thickness is 80-120 μm, the utility model is provided with reinforcing component, can greatly improve the overall strength of output shaft main body, effectively avoid the emergence of damage due to use time increase, beneficial to increase the service life of output shaft.

Description

Technical Field

[0001] This utility model relates to the field of circuit breaker technology, specifically to a shaft structure for an anti-fatigue circuit breaker. Background Technology

[0002] Circuit breakers are core protection devices in power systems. Their core function is to quickly disconnect fault current and prevent equipment damage or fire accidents. During the operation of a circuit breaker, the operating mechanism shaft, as a key component for energy transmission and conversion, must withstand high-frequency impact loads, alternating bending stress, and fretting wear.

[0003] A search revealed a utility model patent with Chinese patent publication number CN206628412U, which discloses a vacuum circuit breaker operating shaft mechanism. The mechanism includes a rotating shaft, a shaft head connected to the rotating shaft, and several transmission components distributed on the rotating shaft. Insulating cold-shrink sleeves with umbels are provided between adjacent transmission components on the rotating shaft to increase creepage distance. This utility model also provides a vacuum circuit breaker, including a frame, several vacuum interrupters, several moving contacts, and a vacuum circuit breaker operating shaft mechanism.

[0004] As mentioned above, the operating shaft needs to withstand various complex loads during use, so damage is inevitable as the usage time increases. If it is not detected and replaced in time, it may affect the operation of the circuit breaker. Utility Model Content

[0005] The purpose of this invention is to provide a shaft structure for a fatigue-resistant circuit breaker to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a shaft structure for a fatigue-resistant circuit breaker, comprising an output shaft body, wherein a reinforcing component is provided on the outside of the output shaft body, the reinforcing component comprising a coating one provided on the outside of the output shaft body, the coating one being made of Ni60A+WC composite material, and a coating two provided on the outside of the coating one, the coating two being made of diamond-like carbon material.

[0007] The coating significantly improves the overall strength of the output shaft body, effectively preventing damage caused by increased usage time and extending the service life of the output shaft. The first coating on the exterior of the output shaft body is a Ni60A+WC composite coating. This material has extremely high hardness, which can significantly improve the overall wear resistance of the device. It can resist fretting wear and prevent fatigue spalling, and reduce the deformation of micro-protrusions on the contact surface, reducing the fretting wear rate and extending the shaft life. The residual compressive stress of the coating can offset some of the working stress and delay crack initiation, thereby improving fatigue resistance. There are other important coatings on the exterior of the output shaft body. The outermost second coating is a diamond-like carbon coating with a surface hardness of HRC70 and a friction coefficient reduced to 0.05, which can significantly inhibit the initiation and propagation of fatigue cracks. Its self-lubricating properties can avoid adhesive wear caused by dry friction and extend the service life of the shaft and bearing.

[0008] As a further preferred embodiment of this technical solution, the outer surface of the output shaft body is provided with several reinforcing strips, which are made of TiN material.

[0009] As a further preferred embodiment of this technical solution, a through hole is provided in the middle of the output shaft body, and a support frame is fixedly connected inside the through hole.

[0010] It can reduce weight by more than 30%, reduce inertial force, thereby improving the circuit breaker's action response speed, while maintaining rigidity. The support frame inserted inside the through hole can further improve the strength of the output shaft body without adding too much weight.

[0011] As a further preferred embodiment of this technical solution, both the output shaft body and the support frame are made of 17-4PH stainless steel.

[0012] As a further preferred embodiment of this technical solution, the coating thickness is 80-120 μm.

[0013] As a further preferred embodiment of this technical solution, the thickness of the second coating is 2-5 μm.

[0014] As a further preferred embodiment of this technical solution, the thickness of the reinforcing strip is 0.8 mm.

[0015] This utility model provides a shaft structure for a fatigue-resistant circuit breaker, which has the following advantages:

[0016] (1) By setting up reinforcing components, this utility model can significantly improve the overall strength of the output shaft body, effectively avoid damage caused by increased use time, and help increase the service life of the output shaft. The first coating on the outside of the output shaft body is a Ni60A+WC composite coating. This material has extremely high hardness, which can significantly improve the overall wear resistance of the device. It can play a role in resisting fretting wear and preventing fatigue spalling, and can reduce the deformation of micro-protrusions on the contact surface, reduce the fretting wear rate, and help extend the shaft life. The residual compressive stress of the coating can offset part of the working stress and delay the crack initiation, thereby improving the fatigue resistance. There are other coatings on the outside of the output shaft body that play an important role. The outermost second coating is a diamond-like carbon coating with a surface hardness of HRC70 and a friction coefficient reduced to 0.05, which can significantly inhibit the initiation and propagation of fatigue cracks. Its self-lubricating properties can avoid adhesive wear caused by dry friction and extend the service life of the shaft and bearing.

[0017] (2) By setting through holes and support frames, this utility model can reduce weight by more than 30%, reduce inertial force, thereby improving the circuit breaker's action response speed while maintaining rigidity. The support frames inserted inside the through holes can further improve the strength of the output shaft body without increasing the weight too much. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the overall third-view structure of this utility model;

[0021] Figure 4 For the present utility model Figure 1 Enlarged structural diagram at point A in the middle;

[0022] In the figure: 1. Output shaft body; 2. Through hole; 3. Support frame; 4. Reinforcing strip; 5. Reinforcing component; 501. Coating one; 502. Coating two. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a technical solution: such as Figure 2 , Figure 3 and Figure 4As shown in this embodiment, a shaft structure for a fatigue-resistant circuit breaker includes an output shaft body 1. A reinforcing component 5 is provided on the outside of the output shaft body 1. The reinforcing component 5 includes a coating 501 provided on the outside of the output shaft body 1. The coating 501 is made of Ni60A+WC composite material. A coating 502 is provided on the outside of the coating 501. The coating 502 is made of diamond-like carbon material.

[0025] The outer coating 501 of the output shaft body 1 is a Ni60A+WC composite coating. This material has extremely high hardness, which can significantly improve the overall wear resistance of the device. It can play a role in resisting fretting wear and preventing fatigue spalling, and can reduce the deformation of micro-protrusions on the contact surface, reduce the fretting wear rate, and help extend the shaft life. The residual compressive stress of the coating can offset part of the working stress and delay the initiation of cracks, thereby improving the fatigue resistance. There are other coatings on the outer side of the output shaft body 1 that play an important role. The outermost coating 502 is a diamond-like carbon coating with a surface hardness of HRC70 and a friction coefficient reduced to 0.05. It can significantly inhibit the initiation and propagation of fatigue cracks. Its self-lubricating properties can avoid adhesive wear caused by dry friction and extend the service life of the shaft and bearing.

[0026] like Figure 1 and Figure 2 As shown, the output shaft body 1 has several reinforcing strips 4 on its exterior. The reinforcing strips 4 are made of TiN material. The position of the reinforcing strips 4 does not need to be fixed. It depends on the circuit breaker model used and is set in the part that needs to withstand alternating stress.

[0027] The reinforcing strip 4 is coated with TiN, which can strengthen high-stress areas, prevent early fatigue failure, significantly improve the surface performance of the output shaft body 1, and has excellent corrosion resistance, which can protect the output shaft from corrosive media in the environment and maintain its surface integrity and functionality.

[0028] like Figure 2 and Figure 3 As shown, a through hole 2 is provided in the middle of the output shaft body 1, and a support frame 3 is fixedly connected inside the through hole 2.

[0029] It can reduce weight by more than 30%, reduce inertial force, thereby improving the circuit breaker's action response speed, while maintaining rigidity. The support frame 3 inserted inside the through hole 2 can further improve the strength of the output shaft body 1 without adding too much weight.

[0030] like Figure 3 As shown, both the output shaft body 1 and the support frame 3 are made of 17-4PH stainless steel, which has the characteristics of high strength and toughness, and excellent corrosion resistance, and can adapt to working in humid and corrosive environments.

[0031] like Figure 3 and Figure 4 As shown, the thickness of coating 501 is 80-120μm.

[0032] like Figure 3 and Figure 4 As shown, the thickness of coating 2 (502) is 2-5 μm.

[0033] like Figure 1 and Figure 2 As shown, the thickness of the reinforcing strip 4 is 0.8 mm.

[0034] This utility model provides a shaft structure for a fatigue-resistant circuit breaker, and its specific working principle is as follows:

[0035] When the device is working, the outer coating 501 of the output shaft body 1 is a Ni60A+WC composite coating. This material has extremely high hardness, which can significantly improve the overall wear resistance of the device. It can play a role in resisting fretting wear and preventing fatigue spalling, and can reduce the deformation of micro-protrusions on the contact surface, reduce the fretting wear rate, and help extend the shaft life. The residual compressive stress of the coating can offset part of the working stress and delay the initiation of cracks, thereby improving the fatigue resistance. There are other coatings on the outer side of the output shaft body 1 that play an important role. The outermost coating 502 is a diamond-like carbon coating with a surface hardness of HRC70 and a friction coefficient reduced to 0.05. It can significantly inhibit the initiation and propagation of fatigue cracks. Its self-lubricating properties can avoid adhesive wear caused by dry friction and extend the service life of the shaft and bearing. In addition, the output shaft body 1 has special reinforcement structures in certain areas on its exterior. A reinforcing band 4, coated with TiN, is provided at the location where the connecting piece is mounted on the output shaft body 1. This band strengthens high-stress areas, prevents early fatigue failure, significantly improves the surface properties of the output shaft body 1, and has excellent corrosion resistance, protecting the output shaft from corrosive media in the environment and maintaining its surface integrity and functionality. A through hole 2 is provided inside the output shaft body 1, which reduces weight by more than 30%, lowers inertial forces, and thus improves the circuit breaker's operating response speed while maintaining rigidity. The support frame 3 inserted inside the through hole 2 further enhances the strength of the output shaft body 1 without adding excessive weight.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A shaft structure for a fatigue-resistant circuit breaker, comprising an output shaft body (1), characterized in that: The output shaft body (1) is provided with a reinforcing component (5) on the outside. The reinforcing component (5) includes a coating one (501) provided on the outside of the output shaft body (1). The coating one (501) is made of Ni60A+WC composite material. The coating one (501) is provided with a coating two (502) on the outside of the coating one (501). The coating two (502) is made of diamond-like carbon material.

2. The shaft structure for a fatigue-resistant circuit breaker according to claim 1, characterized in that: The output shaft body (1) is provided with several reinforcing strips (4) on its outside, and the reinforcing strips (4) are made of TiN material.

3. The shaft structure for a fatigue-resistant circuit breaker according to claim 1, characterized in that: The output shaft body (1) has a through hole (2) in the middle position, and a support frame (3) is fixedly connected inside the through hole (2).

4. The shaft structure for a fatigue-resistant circuit breaker according to claim 3, characterized in that: The output shaft body (1) and support frame (3) are both made of 17-4PH stainless steel.

5. The shaft structure for a fatigue-resistant circuit breaker according to claim 1, characterized in that: The coating (501) has a thickness of 80-120 μm.

6. The shaft structure for a fatigue-resistant circuit breaker according to claim 1, characterized in that: The thickness of the second coating (502) is 2-5 μm.

7. The shaft structure for a fatigue-resistant circuit breaker according to claim 2, characterized in that: The thickness of the reinforcing strip (4) is 0.8 mm.

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