Polarity testing device for square reaction flywheel
The polarity testing device using a bread pan and a low-friction turntable solves the problems of high cost and safety hazards in polarity testing of reaction flywheels, achieving low-cost, high-efficiency polarity determination and rapid detection, and is applicable to square flywheels of different sizes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI ZHONGCHEN XINWEI AEROSPACE TECHNOLOGY CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-01
AI Technical Summary
In the existing technology, the polarity testing method for reaction flywheels is costly, inefficient, and poses safety hazards, making it difficult to meet the needs of large-scale production or rapid commissioning.
A polarity testing device using a bread pan and a low-friction turntable determines polarity by observing the rotation direction of the flywheel at different speeds. The design of the low-friction turntable and bread pan avoids cable tangling, simplifies the installation process, and reduces equipment costs and mechanical risks.
It enables low-cost, intuitive, and efficient polarity testing, suitable for rapid testing on production lines, reducing mechanical risks and improving testing stability and equipment lifespan.
Smart Images
Figure CN224189521U_ABST
Abstract
Description
A polarity testing device for a square reaction flywheel Technical Field
[0001] This utility model relates to the field of spacecraft attitude control technology, and in particular to a polarity testing device for a square reaction flywheel. Background Technology
[0002] The reaction flywheel is a core component of the spacecraft attitude control system, and the accuracy of its rotation direction (polarity) directly affects the stability and reliability of the control system. Traditional polarity testing methods mainly include:
[0003] 1. Laser velocimeter method: Polarity is determined by measuring the direction of the flywheel's rotation speed, but the equipment is expensive and requires precise calibration.
[0004] 2. Hall sensor detection method: This method relies on the signal phase of the flywheel's built-in sensor, but some flywheels do not have this function.
[0005] 3. Visual inspection method: Observe the direction of the flywheel, but it is difficult to distinguish at low speeds and there are safety hazards.
[0006] The methods described above either rely on high-cost equipment or are inefficient, making them unsuitable for large-scale production or rapid debugging. Therefore, there is an urgent need for a simple, reliable, and low-cost polarity testing solution.
[0007] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention
[0008] The purpose of this invention is to provide a polarity testing device for a square reaction flywheel. This polarity testing device is low-cost, intuitive, efficient, safe, highly compatible, and optimizes cable management.
[0009] This utility model provides a polarity testing device for a square reaction flywheel, including a bread pan and a low-friction turntable. The bread pan is circular, with a through-hole at its center and a first groove on its upper surface. One end of the first groove communicates with the first hole, and the other end extends to the edge of the bread pan. The low-friction turntable includes a base, a connecting pipe, and a bearing. The base has a conical cross-section, and the connecting pipe is fixedly connected to the middle of the upper end of the base. The other end of the connecting pipe is inserted into the bearing, and the other end of the bearing is fixedly connected to the center of the lower surface of the bread pan. Four threaded holes are provided on the upper surface of the bread pan, arranged in a square pattern with the center of the square pattern located at the center of the bread pan. A second through-hole is provided at the center of the base, and a second groove is provided on the lower surface of the base. One end of the second groove communicates with the second hole, and the other end extends to the edge of the base.
[0010] Using the above technical solution, the bread pan can rotate freely on the low-friction turntable. During use, align the four positioning holes on the flywheel base with the four threaded holes on the bread pan, and fix the flywheel to the bread pan with four screws (ensuring the mounting feet are aligned with the threaded holes to avoid eccentricity). Lead the cable from the flywheel through the first cable channel and connect it to the host computer. Power on the flywheel and the host computer, and set the speed command (e.g., +100 rpm). If the bread pan rotates clockwise when a positive speed / torque is input, the flywheel polarity is correct; if the bread pan rotates counterclockwise when a negative speed / torque is input, the flywheel polarity is correct. The speed can be adjusted in steps (e.g., ±50 rpm, ±200 rpm) to verify the steering consistency under different working conditions and achieve dynamic testing.
[0011] Furthermore, the axis of the first wire hole, the axis of the connecting pipe, the axis of the bearing, and the axis of the second wire hole coincide.
[0012] Furthermore, the included angle between the first groove and the second groove is 180 degrees.
[0013] This utility model discloses a polarity testing device for square reaction flywheels, which only requires a bread pan and a low-friction turntable with bearings, without the need for precision sensors; the direction of rotation is visually discernible, making it suitable for rapid testing on production lines; the flywheel does not need to run at high speed, reducing mechanical risks; it is suitable for square flywheels of different sizes, requiring only the matching mounting feet; the cable groove design avoids cable tangling, improving testing stability and equipment lifespan. Attached Figure Description
[0014] Figure 1 is a schematic diagram of the polarity testing device for a square reaction flywheel provided in an embodiment of this utility model.
[0015] Figure 2 is a structural schematic diagram of the polarity testing device for the square reaction flywheel in Figure 1 from another perspective.
[0016] Figure 3 is a plan view of the polarity testing device used for the square reaction flywheel in Figure 1.
[0017] Figure 4 is a cross-sectional schematic diagram of the polarity testing device used for the square reaction flywheel in Figure 1.
[0018] Figure 5 is a schematic diagram of the polarity testing device and flywheel combination used in Figure 1 for the square reaction flywheel.
[0019] The reference numerals and components involved in the accompanying drawings are shown below:
[0020] 100. Bread plate
[0021] 110. First wire hole
[0022] 120. First groove
[0023] 130. Threaded hole
[0024] 200, Low Friction Turntable
[0025] 210. Base
[0026] 220. Connecting pipe
[0027] 230. Bearings
[0028] 240. Second wire hole
[0029] 250, Second groove
[0030] 300. Flywheel Detailed Implementation
[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.
[0032] The terms "first," "second," "third," "fourth," etc., used in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.
[0033] Example 1
[0034] Figure 1 is a structural schematic diagram of the polarity testing device for a square reaction flywheel provided in an embodiment of the present invention. Figure 2 is a structural schematic diagram of the polarity testing device for a square reaction flywheel in Figure 1 from another perspective. Figure 3 is a plan view of the polarity testing device for a square reaction flywheel in Figure 1. Figure 4 is a cross-sectional view of the polarity testing device for a square reaction flywheel in Figure 1. Please refer to Figures 1, 2, 3, and 4. The polarity testing device for a square reaction flywheel provided in this embodiment of the present invention includes a bread pan 100 and a low-friction turntable 200. The bread pan 100 is circular, with a through first wire hole 110 at its center. A first wire groove 120 is provided on the top of the bread pan 100, with one end of the first wire groove 120 communicating with the first wire hole 110 and the other end extending to the edge of the bread pan 100. The low-friction turntable 200 includes a base 210, a connecting pipe 220, and a bearing 230. The base 210 has a conical cross-section. The connecting pipe 220 is fixedly connected to the middle of the upper end, and the other end of the connecting pipe 220 is inserted into the bearing 230. The other end of the bearing 230 is fixedly connected to the center of the bottom of the bread pan 100. Four threaded holes 130 are provided on the upper part of the bread pan 100. The four threaded holes 130 are arranged in a square, and the center of the square arrangement is located at the center of the bread pan 100. A second through hole 240 is provided at the center of the base 210. A second groove 250 is provided on the bottom of the base 210. One end of the second groove 250 communicates with the second hole 240, and the other end of the second groove 250 extends to the edge of the base 210.
[0035] It should be noted that the design of the first cable groove 120, the first cable hole 110, the second cable groove 250, and the second cable hole 240 is designed to prevent cable tangling: when the flywheel rotates, the cable can naturally extend along the grooves, preventing breakage or signal interference due to twisting. Simplified installation: centralized cable management reduces clutter and facilitates quick disassembly and replacement of the flywheel. Cable protection: the groove structure prevents the cable from rubbing against rotating parts, extending its service life.
[0036] Figure 5 is a schematic diagram of the polarity testing device and flywheel assembly used in Figure 1. Referring to Figure 5, the testing principle of this utility model's polarity testing device is as follows:
[0037] When the flywheel 300 is driven by the host computer to rotate counterclockwise, the reaction torque drives the bread pan 100 to rotate clockwise; when the flywheel 300 is driven to rotate clockwise, the reaction torque drives the bread pan 100 to rotate counterclockwise. By observing the rotation direction of the bread pan 100, the polarity of the flywheel 300 can be quickly determined.
[0038] It should be noted that the bread pan 100 can rotate freely on the low-friction turntable 200. During use, align the four positioning holes on the flywheel 300 base 210 with the four threaded holes 130 on the bread pan 100, and fix the flywheel 300 to the bread pan 100 using four screws, ensuring the mounting feet are aligned with the threaded holes 130 to avoid misalignment. Lead the cable on the flywheel 300 through the first cable channel 120 and connect it to the host computer. Power on the flywheel 300 and the host computer, and set the speed command (e.g., +100 rpm). If the bread pan 100 rotates clockwise when a positive speed / torque is input, the flywheel 300 polarity is correct; if the bread pan 100 rotates counterclockwise when a negative speed / torque is input, the flywheel 300 polarity is correct. The speed can be adjusted in steps (e.g., ±50 rpm, ±200 rpm) to verify the steering consistency under different working conditions and achieve dynamic testing.
[0039] The polarity testing device of this utility model only requires a bread pan 100 and a low-friction turntable 200 with bearings 230, without the need for precision sensors; the direction of rotation is visually discernible, making it suitable for rapid testing on production lines; the flywheel 300 does not need to run at high speed, reducing mechanical risks; it is suitable for square flywheels 300 of different sizes, requiring only the matching mounting feet; the cable groove design avoids cable tangling, improving testing stability and equipment lifespan.
[0040] Referring further to Figure 4, the axis of the first wire hole 110, the axis of the connecting pipe 220, the axis of the bearing 230, and the axis of the second wire hole 240 of this utility model coincide; the included angle between the first wire groove 120 and the second wire groove 250 is 180 degrees.
[0041] As can be seen from the above description, the advantages of this utility model are:
[0042] 1. The polarity testing device for a square reaction flywheel of this utility model is low-cost: it only requires a bread pan and a low-friction turntable with bearings, and does not require precision sensors.
[0043] 2. The polarity testing device for square reaction flywheels of this utility model is intuitive and efficient: the direction of rotation is visible to the naked eye, and it is suitable for rapid testing on the production line;
[0044] 3. The polarity testing device for a square reaction flywheel of this utility model has high safety: the flywheel does not need to run at high speed, reducing mechanical risks;
[0045] 4. The polarity testing device for square reaction flywheels of this utility model has strong compatibility: it is suitable for square flywheels of different sizes and only requires the fitting of mounting feet.
[0046] 5. The polarity testing device for square reaction flywheels of this utility model features optimized cable management: the rectangular groove design avoids cable tangling, improving test stability and equipment lifespan.
[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A polarity testing device for a square reaction flywheel, characterized in that, The system includes a bread pan (100) and a low-friction turntable (200). The bread pan (100) is circular, with a through-hole (110) at its center and a first groove (120) on its top. One end of the groove (120) communicates with the first hole (110), and the other end extends to the edge of the bread pan (100). The low-friction turntable (200) includes a base (210), a connecting pipe (220), and a bearing (230). The base (210) has a conical cross-section, and the connecting pipe (220) is fixedly connected to the middle of the upper part of the base (210). The other end of the connecting tube (220) is inserted into the bearing (230), and the other end of the bearing (230) is fixedly connected to the center of the bread pan (100). Four threaded holes (130) are provided on the top of the bread pan (100), and the four threaded holes (130) are arranged in a square, with the center of the square arrangement located at the center of the bread pan (100). A second through hole (240) is provided at the center of the base (210), and a second groove (250) is provided on the bottom of the base (210). One end of the second groove (250) is connected to the second hole (240), and the other end of the second groove (250) extends to the edge of the base (210).
2. The polarity testing device for a square reaction flywheel according to claim 1, characterized in that, The axis of the first wire hole (110), the axis of the connecting pipe (220), the axis of the bearing (230), and the axis of the second wire hole (240) coincide.
3. The polarity testing device for a square reaction flywheel according to claim 1, characterized in that, The included angle between the first groove (120) and the second groove (250) is 180 degrees.