Transmission device of solid insulation switch cabinet and use method of transmission device

Abstract

The invention discloses a transmission device of a solid insulation switch cabinet and a using method thereof, and the transmission device comprises an isolation mechanism fixing frame, an isolation mechanism is arranged on the isolation mechanism fixing frame, an output rotating shaft is arranged on the isolation mechanism, a first flexible transmission wheel is fixed on the output rotating shaft, and a supporting rotating shaft is rotatably arranged on the isolation mechanism fixing frame. A second flexible transmission wheel is fixed to the first end of the supporting rotating shaft, a first bevel gear is fixed to the other end of the supporting rotating shaft, the first flexible transmission wheel and the second flexible transmission wheel are sleeved with flexible elements in a surrounding mode, the transmission ratio of the first flexible transmission wheel to the second flexible transmission wheel is larger than 1, and the first bevel gear is meshed with a second bevel gear. The transmission ratio of the first bevel gear to the second bevel gear is smaller than 1, and a transmission shaft is coaxially fixed to the second bevel gear and connected with the gearbox. According to the invention, a two-stage transmission mode of firstly reducing speed and increasing torque and then increasing speed and reversing is adopted, so that the device can be suitable for a solid insulation switch cabinet with high torque output and compact layout requirements.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment. More specifically, the present invention is a transmission device for a solid-insulated switchgear and its usage method. Background Art

[0002] There are various problems in the transmission system between the isolating mechanism and the gearbox in existing solid switch insulating cabinets. In terms of transmission efficiency, when the traditional transmission system transmits power, there is a large energy loss, resulting in a low overall transmission efficiency and affecting the performance of the switchgear. In terms of torque output, as solid switch insulating cabinets develop towards large capacity and high voltage levels, the requirements for the torque output of the transmission system between the isolating mechanism and the gearbox are also getting higher and higher. Some existing transmission systems may not be able to provide sufficient torque due to design and structural limitations, resulting in problems such as unsmooth operation and slow movement during the quick opening and closing operations of the switch. In terms of compact layout, the internal space of solid switch insulating cabinets is small, but the existing transmission systems are relatively bulky and cannot make full use of the space inside the cabinet through the direction change of components by their own structures, restricting the layout of other components inside the solid switch insulating cabinet and being unfavorable for the miniaturization and compactness of the equipment. When the isolating mechanism and the gearbox need to be arranged on different planes or have special angle requirements, complex modifications or re-designs are often required. Summary of the Invention

[0003] To solve the existing technical problems, the present invention innovatively provides a transmission device for a solid-insulated switchgear, adopting a two-stage transmission method of first decelerating and increasing torque and then accelerating and reversing, enabling it to be applicable to solid-insulated switchgears with high torque output and compact layout requirements.

[0004] To achieve the above technical objectives, an embodiment of the present invention discloses a transmission device for a solid-insulated switchgear, including a fixing frame for the isolating mechanism. An isolating mechanism is provided on the fixing frame for the isolating mechanism. An output rotating shaft is provided on the isolating mechanism. A first flexible transmission wheel is fixed on the output rotating shaft. A supporting rotating shaft is rotatably provided on the fixing frame for the isolating mechanism. A second flexible transmission wheel is fixed to the first end of the supporting rotating shaft, and a first bevel gear is fixed to the other end of the supporting rotating shaft. A flexible element is sleeved around the first flexible transmission wheel and the second flexible transmission wheel in a surrounding manner. The transmission ratio between the first flexible transmission wheel and the second flexible transmission wheel is greater than 1. The first bevel gear meshes with a second bevel gear. The transmission ratio between the first bevel gear and the second bevel gear is less than 1. A transmission shaft is coaxially fixed to the second bevel gear, and the transmission shaft is connected to the gearbox.

[0005] Further, in a transmission device for a solid-insulated switchgear of the present invention, the flexible element is a chain, both the first flexible transmission wheel and the second flexible transmission wheel are external gears, and the tooth ratio between the first flexible transmission wheel and the second flexible transmission wheel is 5:12.

[0006] Further, for a transmission device of a solid insulation switchgear according to the present invention, the number of teeth of the first flexible transmission wheel is 15, and the number of teeth of the second flexible transmission wheel is 36.

[0007] Further, for a transmission device of a solid insulation switchgear according to the present invention, the tooth ratio of the first bevel gear and the second bevel gear is 3:2.

[0008] Further, for a transmission device of a solid insulation switchgear according to the present invention, the number of teeth of the first bevel gear is 30, and the number of teeth of the second bevel gear is 20.

[0009] Further, for a transmission device of a solid insulation switchgear according to the present invention, the isolation mechanism is installed on the upper side of the isolation mechanism fixing frame. A first mounting plate and a second mounting plate are provided on the left side of the isolation mechanism fixing frame. The first mounting plate is vertically arranged, and the second mounting plate is perpendicular to the first mounting plate to form an L-shaped structure. The support rotating shaft is rotatably installed on the first mounting plate, the transmission shaft is rotatably installed on the second mounting plate, and the first bevel gear and the second bevel gear are located within the L-shaped structure formed by the first mounting plate and the second mounting plate.

[0010] Further, for a transmission device of a solid insulation switchgear according to the present invention, a copper bushing is fixedly sleeved at one end of the transmission shaft opposite to the second bevel gear, and the transmission shaft is in interference fit with the driving gear in the gearbox through the coaxial bushing.

[0011] The embodiment of the present invention also provides a usage method of a transmission device such as that of a solid insulation switchgear, which is characterized in that it includes the following steps:

[0012] Power on the isolation mechanism, and drive the output rotating shaft to rotate by the isolation mechanism;

[0013] Drive the second flexible transmission wheel to rotate by the first flexible transmission wheel on the output rotating shaft under the action of the flexible element according to the first transmission ratio, and the first transmission ratio is greater than 1;

[0014] Drive the second bevel gear to rotate by the first bevel gear under the action of the support rotating shaft by the second flexible transmission wheel according to the second transmission ratio, and the second transmission ratio is less than 1;

[0015] Input the power to the gearbox through the transmission shaft connected to the second bevel gear.

[0016] Further, for the usage method of the transmission device of the solid insulation switchgear according to the present invention, the tooth ratio of the first flexible transmission wheel and the second flexible transmission wheel is 5:12.

[0017] Furthermore, a method of using the transmission device of the solid-insulated switchgear of the present invention, wherein the tooth ratio of the first bevel gear and the second bevel gear is 3:2.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention adopts a two-stage transmission method. The first stage of transmission is composed of a flexible transmission wheel, and the second stage of transmission is composed of bevel gears, realizing deceleration and torque increase first and then speed increase and steering.

[0020] 2. The first stage of transmission reduces the speed and amplifies the torque, while the second stage of transmission increases the speed to meet the requirements of the gearbox, overall optimizing the torque and speed output of the transmission device.

[0021] 3. The low-speed design of the first stage of transmission reduces the wear of the flexible transmission wheel and energy loss, and the second stage of transmission reduces the load on the bevel gear, further reducing wear and fatigue damage, and improving the service life and transmission efficiency.

[0022] 4. The first stage of transmission with a larger transmission ratio helps to reduce the size and weight of the device, and at the same time allows the second stage of transmission to use smaller bevel gears, facilitating the realization of a compact design and adapting to different space requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram (after assembly) of a transmission device of a solid-insulated switchgear of the present invention;

[0024] Figure 2 is a schematic structural diagram (before assembly) of a transmission device of a solid-insulated switchgear of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The following will explain and describe in detail a transmission device of a solid-insulated switchgear of the present invention with reference to the accompanying drawings of the specification.

[0026] As Figure 1-2 shown, an embodiment of the present invention discloses a transmission device of a solid-insulated switchgear, including an isolating mechanism fixing frame 1. An isolating mechanism is provided on the isolating mechanism fixing frame 1. An output rotating shaft 2 is provided on the isolating mechanism. A first flexible transmission wheel 3 is fixed on the output rotating shaft 2. A supporting rotating shaft 4 is also rotatably provided on the isolating mechanism fixing frame 1. A second flexible transmission wheel 5 is fixed at the first end of the supporting rotating shaft 4, and a first bevel gear 6 is fixed at the other end of the supporting rotating shaft 4. A flexible element 7 is sleeved around the first flexible transmission wheel 3 and the second flexible transmission wheel 5. The transmission ratio of the first flexible transmission wheel 3 and the second flexible transmission wheel 5 is set to be greater than 1. The first bevel gear 6 meshes with a second bevel gear 8. The transmission ratio of the first bevel gear 6 and the second bevel gear 8 is set to be less than 1. A transmission shaft 9 is coaxially fixed on the second bevel gear 8, and the transmission shaft 9 is connected to a gearbox 10.

[0027] During actual use, the output rotating shaft 2 of the isolation mechanism rotates to drive the first flexible transmission wheel 3 to rotate. Under the action of the flexible element 7, the second flexible transmission wheel 5 is driven to rotate. The support rotating shaft 4 is synchronously driven to rotate by the second flexible transmission wheel 5, and then the first bevel gear 6 is driven to rotate by the support rotating shaft 4. At this time, the low-speed and high-torque output of the isolation mechanism is completed. Then, the first bevel gear 6 drives the second bevel gear 8 to rotate, and the second bevel gear 8 drives the transmission shaft 9 to rotate. Finally, after the speed is increased, the power is transmitted to the gearbox 10, and thus the transmission of the power of the isolation mechanism to the gearbox 10 is completed.

[0028] In this embodiment, the two-stage transmission method is adopted to first decelerate and increase torque, and then increase speed and change direction. The first flexible transmission wheel 3 and the second flexible transmission wheel 5 form the first stage of transmission, and the first bevel gear 6 and the second bevel gear 8 form the second stage of transmission. In the first stage of transmission, the output speed of the output rotating shaft 2 is reduced, and at the same time, the torque is amplified, so that the second stage of transmission has a greater torque input to meet the power requirement of the gearbox 10. The second stage of transmission drives the second bevel gear 8 through the first bevel gear 6, and increases the speed to the required output speed to meet the speed requirement of the gearbox 10, so that the overall transmission device reaches the optimal output state in terms of both torque and speed; since the speed of the first stage of transmission is relatively low, the friction frequency and impact force between the first flexible transmission wheel 3 and the second flexible transmission wheel 5 and the flexible element 7 are reduced, thereby reducing the wear degree of each component and also reducing the energy loss. At the same time, after the speed is reduced and the torque is increased in the first stage of transmission, the torque has been appropriately amplified in the first transmission. During the speed increase process of the second stage of transmission, compared with the single-stage transmission, it can be carried out at a relatively low torque level, without having to bear too much torque, which helps to reduce the loads on the first bevel gear 6 and the second bevel gear 8, also reduces the energy loss, and further reduces wear and fatigue damage, improving the overall service life and transmission efficiency of the transmission device; adopting the first stage of transmission with a larger transmission ratio can, to a certain extent, reduce the size and weight of the entire transmission device. Through the deceleration effect of the first stage of transmission, the speed requirement of the second transmission stage can be relatively reduced, so that the first bevel gear 6 and the second bevel gear 8 with smaller sizes can be selected. Through the meshing and matching relationship between the first bevel gear 6 and the second bevel gear 8, the spatial setting direction of the transmission shaft 9 can be effectively changed to adapt to the requirements that the isolation mechanism and the gearbox 10 need to be arranged on different planes or have special angle requirements, which is conducive to realizing the compact design of the transmission device and making full and reasonable use of the limited space of the solid insulation switchgear.

[0029] In an embodiment of the present invention, the flexible element 7 is a chain, and the first flexible transmission wheel 3 and the second flexible transmission wheel 5 are both external gears. Through the cooperation mode of the external gear and the chain, the number of rotation turns of the output rotating shaft 2 of the isolation mechanism can be accurately fed back to the gearbox 10. When the isolation mechanism operates in place, the switching synchronization operation responsible for by the gearbox 10 is also completed accordingly. Although the belt cooperation mode can also be adopted, when using the belt, an additional anti-slip device needs to be added to prevent the belt from slipping. In contrast, the chain cooperation mode is easier to implement and the action is more accurate. The tooth ratio of the first flexible transmission wheel 3 and the second flexible transmission wheel 5 is 5:12, while the tooth ratio of the first bevel gear 6 and the second bevel gear 8 is 3:2. More specifically, the number of teeth of the first flexible transmission wheel 3 is 15, the number of teeth of the second flexible transmission wheel 5 is 36, the number of teeth of the first bevel gear 6 is 30, and the number of teeth of the second bevel gear 8 is 20. Experiments show that setting the number of teeth of the first flexible transmission wheel 3 to 15 and the number of teeth of the second flexible transmission wheel 5 to 36 can achieve a large transmission ratio in the relatively compact space of the solid insulation switchgear. This tooth ratio setting can greatly reduce the rotation speed of the support rotating shaft 4 and increase the torque correspondingly, meeting the power requirements of the gearbox 10. Setting the number of teeth of the first bevel gear 6 to 30 and the number of teeth of the second bevel gear 8 to 20 can accurately distribute and steer the power according to the design requirements. Through the bevel gear transmission with this tooth ratio, the support rotating shaft 4 and the transmission shaft 9 with different axes can obtain accurate rotation speed and torque ratios to ensure the action accuracy. And setting such a tooth ratio can make the meshing of the first bevel gear 6 and the second bevel gear 8 more reasonable, reduce energy loss, and improve the transmission efficiency. In addition, through the setting of the number of teeth of the first bevel gear 6 and the second bevel gear 8, the power transmission and steering can be realized in the relatively small space inside the solid insulation switchgear, making full use of the cabinet space, which is beneficial to the compactification and miniaturization of the solid insulation switchgear. After the secondary transmission is used in combination, the total transmission ratio of the transmission device is 18:5, which can make the transmission ratio of the entire transmission device more reasonable, the performance more optimized, and meet the requirements of the gearbox 10 for large torque.

[0030] In an embodiment of the present invention, the isolation mechanism is installed on the upper side of the isolation mechanism fixing frame 1. On the left side of the isolation mechanism fixing frame 1, there are a first mounting plate and a second mounting plate, making full use of the space on the left side of the isolation mechanism fixing frame 1 to provide a suitable installation space for the support rotating shaft 4 and the transmission shaft 9, thereby improving the space utilization rate. The first mounting plate is arranged vertically, and the second mounting plate is perpendicular to the first mounting plate to form an L-shaped structure. The support rotating shaft 4 is rotatably installed on the first mounting plate, and the transmission shaft 9 is rotatably installed on the second mounting plate. The L-shaped structure has good stability and mechanical properties, which can provide a firm support for the support rotating shaft 4 and the transmission shaft 9 installed thereon, enabling the support rotating shaft 4 and the transmission shaft 9 to rotate flexibly respectively, ensuring the smoothness during the power transmission process, effectively reducing friction and energy loss, improving the transmission efficiency, and being able to better withstand the torque, axial force, radial force, etc. generated during the transmission process, reducing structural deformation and extending the service life. The first bevel gear 6 and the second bevel gear 8 are located within the L-shaped structure formed by the first mounting plate and the second mounting plate. The first mounting plate and the second mounting plate can effectively protect the first bevel gear 6 and the second bevel gear 8, preventing other components from entering the action space of the first bevel gear 6 and the second bevel gear 8, and ensuring the stability of converting the horizontal-direction power into the vertical-direction power output. At one end of the transmission shaft 9 opposite to the second bevel gear 8, a copper bushing 11 is fixedly sleeved. The transmission shaft 9 is in interference fit with the driving gear in the gearbox 10 through the coaxial sleeve. The copper bushing 11 can play a role in protecting the transmission shaft 9, reducing the wear that may occur when the transmission shaft 9 is in direct contact with other components, and extending the service life of the transmission shaft 9. The transmission shaft 9 is in interference fit with the driving gear in the gearbox 10 through the copper bushing 11, which can provide a reliable connection, ensure the effective transmission of power between the transmission shaft 9 and the driving gear, prevent slipping, and ensure the reliability and stability of the transmission.

[0031] The embodiment of the present invention also provides a usage method of a transmission device such as a solid insulation switchgear, including the following steps:

[0032] Power on the isolation mechanism, and drive the output rotating shaft 2 to rotate by the isolation mechanism;

[0033] Utilize the first flexible transmission wheel 3 on the output rotating shaft 2 to drive the second flexible transmission wheel 5 to rotate according to the first transmission ratio under the action of the flexible element 7, and the first transmission ratio is greater than 1;

[0034] Utilize the second flexible transmission wheel 5 to drive the second bevel gear 8 to rotate according to the second transmission ratio through the first bevel gear 6 under the action of the support rotating shaft 4, and the second transmission ratio is less than 1;

[0035] Utilize the transmission shaft 9 connected to the second bevel gear 8 to input power into the gearbox 10.

[0036] Among them, the tooth ratio of the first flexible transmission wheel 3 and the second flexible transmission wheel 5 is 5:12, and the tooth ratio of the first bevel gear 6 and the second bevel gear 8 is 3:2.

[0037] In this embodiment, the method realizes a transmission with a first transmission ratio greater than 1 through the tooth ratio of 5:12 between the first flexible transmission wheel 3 and the second flexible transmission wheel 5, and can greatly increase the torque of the output rotating shaft 2. Then, by using the tooth ratio of 3:2 between the first bevel gear 6 and the second bevel gear 8, a transmission with a second transmission ratio less than 1 is realized, and the rotational speed is appropriately increased to meet the requirements of the gearbox 10 for rotational speed and torque.

[0038] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present invention.

[0039] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" can explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and simple improvements made to the substantial content of the present invention shall be included within the protection scope of the present invention.

Claims

1. A transmission device for a solid-insulated switchgear, characterized in that: It includes an isolation mechanism fixing bracket, on which an isolation mechanism is provided. An output rotating shaft is provided on the isolation mechanism, and a first flexible transmission wheel is fixed on the output rotating shaft. A support rotating shaft is rotatably provided on the isolation mechanism fixing bracket. A second flexible transmission wheel is fixed at the first end of the support rotating shaft, and a first bevel gear is fixed at the other end of the support rotating shaft. A flexible element is sleeved around the first flexible transmission wheel and the second flexible transmission wheel in a surrounding manner. The transmission ratio between the first flexible transmission wheel and the second flexible transmission wheel is greater than 1. The first bevel gear meshes with a second bevel gear, and the transmission ratio between the first bevel gear and the second bevel gear is less than 1. A transmission shaft is coaxially fixed on the second bevel gear, and the transmission shaft is connected to a gearbox.

2. The drive device of a solid insulation switchgear according to claim 1, characterized in that: The flexible element is a chain. Both the first flexible transmission wheel and the second flexible transmission wheel are external gears, and the tooth ratio between the first flexible transmission wheel and the second flexible transmission wheel is 5:

12.

3. The drive device of a solid-insulated switchgear according to claim 2, characterized in that: The number of teeth of the first flexible transmission wheel is 15, and the number of teeth of the second flexible transmission wheel is 36.

4. The drive device of a solid-insulated switchgear according to claim 2, characterized in that: The tooth ratio between the first bevel gear and the second bevel gear is 3:

2.

5. The drive device of a solid-insulated switchgear according to claim 4, characterized in that: The number of teeth of the first bevel gear is 30, and the number of teeth of the second bevel gear is 20.

6. The drive device of a solid-insulated switchgear according to claim 4, characterized in that: The isolation mechanism is installed on the upper side of the isolation mechanism fixing bracket. A first mounting plate and a second mounting plate are provided on the left side of the isolation mechanism fixing bracket. The first mounting plate is arranged vertically, and the second mounting plate is perpendicular to the first mounting plate to form an L-shaped structure. The support rotating shaft is rotatably installed on the first mounting plate, the transmission shaft is rotatably installed on the second mounting plate, and the first bevel gear and the second bevel gear are located within the L-shaped structure formed by the first mounting plate and the second mounting plate.

7. The drive device of a solid-insulated switchgear according to claim 6, characterized in that: A copper bushing is fixedly sleeved at the end of the transmission shaft opposite to the second bevel gear, and the transmission shaft is in interference fit with the driving gear in the gearbox through a coaxial sleeve.

8. A method for using a transmission device of a solid-insulated switchgear as described in any one of claims 1-7, characterized in that: It includes the following steps: Power on the isolation mechanism, and drive the output rotating shaft to rotate by the isolation mechanism; Utilize the first flexible transmission wheel on the output rotating shaft to drive the second flexible transmission wheel to rotate under the action of the flexible element according to the first transmission ratio, and the first transmission ratio is greater than 1; Utilize the second flexible transmission wheel to drive the second bevel gear to rotate according to the second transmission ratio through the first bevel gear under the action of the support rotating shaft, and the second transmission ratio is less than 1; Input the power to the gearbox by using the transmission shaft connected to the second bevel gear.

9. The method for using the transmission device of the solid insulation switchgear according to claim 8, characterized in that: The tooth ratio between the first flexible transmission wheel and the second flexible transmission wheel is 5:

12.

10. The method of using the transmission device of the solid insulation switchgear according to claim 9, characterized in that: The tooth ratio between the first bevel gear and the second bevel gear is 3:2.

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