Helicopter starting generator carbon brush polishing tool

Abstract

The utility model relates to the field of engine power supply, and discloses a helicopter starting generator carbon brush polishing tool which comprises an armature fixing clamp, an armature body is arranged on one side of the armature fixing clamp, and a simulation brush carrier is arranged on one side of the armature body. Compared with a traditional manual polishing mode, the helicopter starting generator carbon brush polishing tool remarkably improves operation efficiency, manual polishing is limited by operation precision and physical output, polishing of a single carbon brush usually needs two days, and the tool can polish the single carbon brush by means of high-speed rotation of the armature body after being powered on. The carbon brush is fixed by the simulation brush holder for mechanical polishing, manual intervention and operation time consumption are greatly reduced, the carbon brush is rapidly formed under stable rotating speed and contact pressure through the automatic polishing process, the polishing time of a single carbon brush is shortened to 2 hours, the polishing angle and force do not need to be manually and frequently adjusted, and the carbon brush polishing device is particularly suitable for batch carbon brush machining. The overall production efficiency is effectively improved, and the labor cost and the time cost are reduced.

Description

Technical Field

[0001] This utility model relates to the field of engine power supply, and in particular to a tooling for grinding carbon brushes of helicopter starter generators. Background Technology

[0002] The helicopter starter generator is a core airborne device that combines starting and power generation functions. During the starting phase, the device is powered by an external power source or onboard battery, outputting torque in electric motor mode to drive the helicopter engine to a self-sustaining speed and complete the starting process. Once the engine reaches a stable operating state, the device switches to generator mode, driven by the engine crankshaft through the transmission system, converting mechanical energy into electrical energy to power avionics, hydraulic systems, lighting, and other electrical loads on the helicopter, while also charging the battery. Its integrated design simplifies the helicopter power system structure, ensures reliable starting and continuous power supply, and is a key component for energy conversion and stable operation in the helicopter power system.

[0003] In the overhaul process of starting a generator, carbon brush polishing is a critical step. Existing polishing fixtures mostly consist of a brush holder, carbon brushes, and an armature. During operation, the carbon brushes must first be installed on the brush holder, and then the brush holder must be manually assembled onto the armature and rotated in a specific direction. At the same time, the armature can only be fixed manually using a spline wrench. This not only results in extremely low polishing efficiency, with a single operation often taking up to 2 days, but also makes it difficult to ensure uniform force when fixing manually, which can easily cause uneven polishing of the carbon brushes and create hidden dangers for subsequent use. Therefore, those skilled in the art have provided a carbon brush polishing fixture for helicopter starter generators to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a grinding fixture for carbon brushes of helicopter starter generators. This fixture effectively improves overall production efficiency, reduces labor and time costs, and eliminates problems such as poor contact and localized wear caused by uneven grinding.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A fixture for grinding carbon brushes of a helicopter starter generator includes an armature fixing clamp, an armature body is provided on one side of the armature fixing clamp, and a simulated brush holder is provided on one side of the armature body;

[0007] The armature fixing fixture includes a fixing base, a first clamp, a second support base, two connecting screws, and a second clamp. The first support base is fixedly installed on the upper end of the fixing base. The simulated brush holder includes a circular base, multiple fixing bolts, multiple fixing rods, and multiple fixing frames. Clamping blocks are fixedly installed on the outer surfaces of the upper and lower ends of the multiple fixing rods, and fixing blocks are fixedly installed on both sides of the multiple fixing frames.

[0008] Furthermore, the first clamp is fixedly positioned at the middle of the upper end of the first support base.

[0009] Furthermore, the second clamp is fixedly positioned at the middle of the lower end of the second support base.

[0010] Furthermore, the first support base and the second support base are connected by two connecting screws.

[0011] Furthermore, all of the aforementioned fixing blocks are fixedly connected by fixing bolts and a circular base.

[0012] Furthermore, the plurality of the fixing rods are respectively fixedly installed around the upper part of the circular base.

[0013] Furthermore, a bearing is rotatably installed at the middle position of the upper end of the circular base.

[0014] This utility model has the following beneficial effects:

[0015] 1. The helicopter starter generator carbon brush grinding fixture proposed in this utility model significantly improves work efficiency compared to the traditional manual grinding method. Manual grinding is limited by the precision of operation and physical exertion, and grinding a single carbon brush usually takes 2 days. However, this fixture uses the high-speed rotation of the armature body after it is energized, combined with the simulated brush holder to fix the carbon brush for mechanized grinding, which greatly reduces human intervention and operation time. The automated grinding process allows the carbon brush to be formed quickly under stable speed and contact pressure, shortening the grinding time of a single carbon brush to 2 hours, and eliminating the need for frequent manual adjustment of grinding angle and force. It is especially suitable for batch carbon brush processing, effectively improving overall production efficiency and reducing labor and time costs. 2. The helicopter starter generator carbon brush grinding fixture proposed in this utility model fundamentally solves the problem of uneven carbon brush grinding through the combination design of armature fixing clamp and simulated brush holder. The armature fixing clamp, through adjustable double support base and upper and lower clamp structure, firmly locks the armature body to prevent displacement during grinding. The simulated brush holder, through clamping blocks and bearings, makes the carbon brush contact the armature surface at an angle that conforms to the actual working conditions, ensuring uniform grinding force. This dual fixing and simulated grinding mode can form a smooth and design-compliant arc and contact surface on the carbon brush surface, eliminating problems such as poor contact and local wear caused by uneven grinding. It ensures that after the carbon brush is installed in the helicopter starter generator, it can achieve stable conductivity and long-term operation, effectively reducing the frequency of equipment maintenance and the risk of failure. Attached Figure Description

[0016] Figure 1 This is an axonometric view of the present invention;

[0017] Figure 2 This is a front view schematic diagram of the present utility model;

[0018] Figure 3 This is a schematic diagram of the armature body structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the simulated brush holder structure of this utility model.

[0020] Legend:

[0021] 1. Armature fixing clamp; 2. Armature body; 3. Simulated brush holder; 101. Fixing base; 102. First support base; 103. First clamp; 104. Second support base; 105. Connecting screw; 106. Second clamp; 301. Circular base; 302. Fixing block; 303. Fixing bolt; 304. Fixing rod; 305. Clamping block; 306. Bearing; 307. Fixing frame. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figure 1-4 An embodiment of this utility model provides a carbon brush grinding fixture for helicopter starter generators, including an armature fixing clamp 1, an armature body 2 on one side of the armature fixing clamp 1, and a simulated brush holder 3 on one side of the armature body 2.

[0024] Specifically, the armature fixing clamp 1 is used to firmly clamp the armature body 2, providing a stable foundation for the grinding operation. The armature body 2 is a related component for the grinding operation. The simulated brush holder 3 simulates the actual working environment of the carbon brush, so that the ground carbon brush can be better adapted to the helicopter starter generator. The three work together to improve the accuracy and adaptability of carbon brush grinding.

[0025] Reference Figure 1 , Figure 2 The armature fixing clamp 1 includes a fixing base 101, a first clamp 103, a second support base 104, two connecting screws 105, and a second clamp 106. The first support base 102 is fixedly disposed on the upper end of the fixing base 101. The first clamp 103 is fixedly disposed at the middle position of the upper end of the first support base 102. The second clamp 106 is fixedly disposed at the middle position of the lower end of the second support base 104. The first support base 102 and the second support base 104 are connected by two connecting screws 105.

[0026] Specifically, in the armature fixing fixture 1, the fixing seat 101 provides stable support, the first support seat 102 and the second support seat 104 are connected by the connecting screw 105, and the distance between the two can be adjusted to adapt to armature bodies 2 of different sizes. The first clamp 103 and the second clamp 106 clamp the armature body 2 from the upper and lower ends respectively to ensure that it is stable and does not shake during the grinding process, and to avoid the impact of the displacement of the armature body 2 on the grinding accuracy of the carbon brush.

[0027] Reference Figure 1 , Figure 4 The simulated brush holder 3 includes a circular base 301, multiple fixing bolts 303, multiple fixing rods 304, and multiple fixing brackets 307. Clamping blocks 305 are fixedly installed on the outer surfaces of the upper and lower ends of the multiple fixing rods 304. Fixing blocks 302 are fixedly installed on both sides of the multiple fixing brackets 307. The multiple fixing blocks 302 are fixedly connected to the circular base 301 by fixing bolts 303. The multiple fixing rods 304 are respectively fixedly installed around the upper end of the circular base 301. A bearing 306 is rotatably installed at the middle position of the upper end of the circular base 301.

[0028] Specifically, in the simulated brush holder 3, the circular base 301 provides the installation foundation for the whole, the fixing bracket 307 is fixed to the circular base 301 by fixing bolts 303, which facilitates disassembly and position adjustment, the fixing rod 304 and the clamping block 305 can fix the carbon brush, simulating the installation state of the carbon brush in the actual brush holder, and the bearing 306 allows the simulated brush holder to rotate flexibly during the grinding process, simulating the actual contact movement between the carbon brush and the armature, so that the ground carbon brush better meets the working requirements.

[0029] Working principle: When using the carbon brush grinding fixture for helicopter starter generators, the first step is to prepare for installation. Based on the actual dimensions of the carbon brush, install and fix it using the clamp 305 of the fixing rod 304 on the simulated brush holder 3. If the installation angle needs adjustment, loosen the fixing bolt 303, move the fixing bracket 307 for adjustment, and then tighten it again. Simultaneously, according to the specifications of the armature body 2, adjust the distance between the first support seat 102 and the second support seat 104 in the armature fixing clamp 1, and rotate the connecting screw 105 to adjust it to a suitable position. Then, place the armature body 2 between the first clamp 103 and the second clamp 106 and clamp it. The armature fixing fixture 1 is fixed on the workbench. After installation, the simulated brush holder 3 is installed at the corresponding position of the armature body 2. It is rotatably connected to the armature body 2 through the bearing 306 on the circular base 301. Finally, the armature body 2 is connected to an external power source. After power is turned on, the armature body 2 rotates rapidly. Under the fixation of the simulated brush holder 3, the carbon brush moves relative to the surface of the armature body 2, thereby performing efficient and precise grinding of the carbon brush. During the grinding process, the stable armature fixing fixture 1 can effectively prevent the armature body 2 from shaking, ensuring grinding accuracy until the carbon brush is ground to the shape and size that meet the requirements of helicopter starter generator.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixture for grinding carbon brushes of a helicopter starter generator, including an armature fixing clamp (1), characterized in that: An armature body (2) is provided on one side of the armature fixing clamp (1), and a simulated brush holder (3) is provided on one side of the armature body (2). The armature fixing clamp (1) includes a fixing base (101), a first clamp (103), a second support base (104), two connecting screws (105) and a second clamp (106). The first support base (102) is fixedly installed on the upper end of the fixing base (101). The simulated brush holder (3) includes a circular base (301), multiple fixing bolts (303), multiple fixing rods (304) and multiple fixing frames (307). Clamping blocks (305) are fixedly installed on the outer surfaces of the upper and lower ends of the multiple fixing rods (304), and fixing blocks (302) are fixedly installed on both sides of the multiple fixing frames (307).

2. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: The first clamp (103) is fixedly installed at the middle position of the upper end of the first support base (102).

3. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: The second clamp (106) is fixedly installed at the middle position of the lower end of the second support (104).

4. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: The first support base (102) and the second support base (104) are connected by two connecting screws (105).

5. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: The multiple fixing blocks (302) are fixedly connected by fixing bolts (303) and circular bases (301).

6. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: Multiple fixing rods (304) are respectively fixed around the upper part of the circular base (301).

7. The helicopter starter generator carbon brush grinding fixture according to claim 1, characterized in that: A bearing (306) is rotatably installed at the middle position of the upper end of the circular base (301).

Images