Transmission performance test platform with closed combination of electric power and mechanical power
By designing a transmission performance test platform that combines electro-power and mechanical power in a closed loop, the problems of high energy consumption and limited testing range of high-power heavy-duty gearbox test benches have been solved. This platform achieves low energy consumption, high efficiency in multi-condition simulation, and cost reduction, and is suitable for performance testing of planetary frequency conversion speed control devices.
Patent Information
- Application Number
- CN202511679021.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-17
- Publication Date
- 2026-02-27
AI Technical Summary
Existing gearbox test benches suffer from high energy consumption, limited test range, and difficulty in simulating complex working conditions when conducting performance and reliability tests on high-power, heavy-duty gearboxes. In particular, they cannot meet the testing requirements for the dual-input single-output and single-input dual-output switching characteristics of planetary frequency converters.
Design a transmission performance test platform that combines electro-mechanical power in a closed loop, comprising a mechanical power closed loop system and an electric power closed loop system. The closed loop system is formed by the test chamber and the test chamber, enabling the recycling of power. It is suitable for the dual-input single-output and single-input dual-output characteristics of planetary frequency converters.
It achieves high-efficiency testing with low energy consumption, can simulate various operating conditions in a small test site, and is suitable for performance testing of various planetary frequency converters, thus reducing test costs.
Smart Images
Figure CN121577326A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to a gear box test platform, belonging to the field of machine testing, and in particular to a transmission performance test platform combining electrical power and mechanical power. BACKGROUND
[0002] The planetary variable frequency speed regulating device utilizes the power split characteristics of planetary transmission, and can achieve the regulation and control of output power and speed by controlling the size and speed variation of a small part of power flow, thus having the working characteristics of double-input single-output and single-input double-output operation mode. At present, such devices have the technical advantages of high efficiency and energy saving, and have gradually entered the market of speed regulating field of industrial equipment such as high-power compressors and water pumps. Designing a test bench suitable for the planetary variable frequency speed regulating device to perform key performance tests and obtain actual operation data of the device is of great importance to the design verification, technical improvement and factory inspection of the product.
[0003] Most of the traditional gear box test benches are designed with open power flow, which consumes a large amount of electrical energy, and the test power and speed range are limited by the performance of the driving motor, and complex working conditions cannot be simulated. This method is only suitable for empty load test or small power gear box test, and it is difficult to meet the performance and reliability test requirements of heavy-duty high-end gear boxes.
[0004] In order to solve the energy consumption problem of full-load performance test or endurance test of high-power heavy-duty gear boxes, power closed technology is gradually applied. This technology feeds back part of the output power in the test to the input end for recycling. The input power of the test bench is only used to compensate for the various friction losses of the equipment during operation, and the driving power of a typical power closed test bench is only a few percent of the test power. Power closed technology includes mechanical power closed and electrical power closed technology, which has been widely used in the field of high-power gear box testing due to its superior energy-saving characteristics. However, the current power closed test bench scheme for high-power heavy-duty gear boxes is often used for single-input single-output gear boxes. For the planetary variable frequency speed regulating device with the working characteristics of double-input single-output and single-input double-output switching, such structure of test bench cannot meet the corresponding test requirements. SUMMARY
[0005] The purpose of the present application is to design a transmission performance test platform combining electrical power and mechanical power closed, which has a more compact structure and lower overall cost, for the planetary variable frequency speed regulating gear box with the working characteristics of double-input single-output and single-input double-output switching.
[0006] A transmission performance test platform combining electrical power and mechanical power closed includes a mechanical power closed system and an electrical power closed system. The mechanical power closed system and the electrical power closed system are connected through an auxiliary test box and a test box to form a closed combination system to provide torque and power, and output the input power to generate electricity and feedback to the power grid.
[0007] Further, the mechanical power closed system comprises a power compensation motor, a first mechanical power closed test box, a first test box, a second test box and a second mechanical power closed test box; the output end of the power compensation motor is connected with the first mechanical power closed test box, the loaders are connected with the first mechanical power closed test box and the second mechanical power closed test box respectively, the first mechanical power closed test box is connected with the planet carrier flange of the first test box, and the second mechanical power closed test box is connected with the planet carrier flange of the second test box.
[0008] Further, the electrical power closed system comprises a first electrical power closed test box, a first mechanical power closed test box, a first test box, a second electrical power closed test box, a loading motor, a dragging motor and an electrical system cabinet; the output end of the loading motor is connected with the input end of the first electrical power closed test box, the output end of the first electrical power closed test box is connected with the input sun gear of the first test box, the output sun gear of the first test box is connected with the output sun gear of the second test box, the input sun gear of the second test box is connected with the input end of the second electrical power closed test box, the output end of the second electrical power closed test box is connected with the input end of the dragging motor, the dragging motor is electrically connected with the electrical system cabinet, and the electrical system cabinet feeds back electrical energy to the power grid.
[0009] The beneficial effects of the present application compared with the prior art are:
[0010] The present application proposes an electrical power and mechanical power closed combined transmission performance test bench aiming at the working characteristics of the planetary variable frequency speed regulating gear box with double input single output and single input double output operation modes. The test bench design scheme can be widely used for constructing performance test benches of various planetary variable frequency speed regulating devices or other types of power split planetary transmission gear devices. The test bench has the advantages of small test site usage and small driving power consumption.
[0011] The present application is provided with a test box, which can drive the tested gear box to operate under different rotating speeds to realize various operating conditions of the test box. At the same time, the axial line offset arrangement is realized to reduce the axial length size of the test bench.
[0012] The present application will be further described below in combination with the drawings and embodiments: BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a schematic view of an electrical power and mechanical power closed combined transmission performance test platform.
[0014] Figure 2 It is a power flow direction diagram of a working mode.
[0015] Figure 3 It is a power flow direction diagram of another working mode. DETAILED DESCRIPTION
[0016] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. Unless otherwise specified, the technical terms or scientific terms used in the present application have their usual meanings understood by those skilled in the art.
[0017] Embodiment 1, Reference Figure 1 The test platform for the transmission performance of the combined power of the electric power and the mechanical power provided in the embodiment is characterized in that it comprises a mechanical power closed system A and an electric power closed system B, the mechanical power closed system A and the electric power closed system B are connected through a test box and a test box to form a closed combined system, the test platform comprises a power compensation motor 1, a first coupling 2, a first electric power closed test box 3, a second coupling 4, a first mechanical power closed test box 5, a first hollow coupling 6, a first test box 7, a third coupling 8, a second test box 9, a second hollow coupling 10, a second mechanical power closed test box 11, a fourth coupling 12, a second electric power closed test box 13, a load 14, a load motor 15, a drag motor 16, an electrical system cabinet 17 and a power grid 18. To provide torque and power, and output the input power to generate electricity and feedback to the power grid.
[0018] The power compensation motor 1 is used to compensate for the friction loss of the mechanical power closed system.
[0019] The first mechanical power closed test box 5 and the second mechanical power closed test box 11 are used to reduce the rotational speed of the test box planetary carrier.
[0020] The load 14 generates torque on the first mechanical power closed test box 5 and the second mechanical power closed test box 11 connected thereto.
[0021] The power compensation motor 1, the first coupling 2, the load 14, the first mechanical power closed test box 5, the first test box 7, the second test box 9, the second mechanical power closed test box 11, the first hollow coupling 6 and the second hollow coupling 10 constitute the mechanical power closed system of the test platform.
[0022] The output shafts of the first mechanical power closed test box 5 and the second mechanical power closed test box 11 are hollow structures.
[0023] The first electric power closed test box 3, the second coupling 4, the first test box 7, the third coupling 8, the second test box 9, the fourth coupling 12, the second electric power closed test box 13, the load motor 15, the drag motor 16 and the electrical system cabinet 17 constitute the electric power closed system of the test platform.
[0024] The mechanical power closed system A of the test bench is used to drive the planet carrier of the test piece, and the electrical power closed system B of the test bench is used to drive the sun gear of the test piece.
[0025] The two test boxes are used to mount the support, bearing and loading device of the test planetary mechanism, and contain a lubricating cooling oil circuit for the test piece and a sensor support for detecting temperature, vibration, lubricating pressure and the like.
[0026] As a preferred technical solution, the loader 14 of the test bench is arranged on the coaxial input shafts of the first mechanical power closed test box 5 and the second mechanical power closed test box 11.
[0027] As a preferred technical solution, the output shafts of the first electrical power closed test box 3 and the second electrical power closed test box 13 are connected to the sun gears of the corresponding test boxes through shafts. The loading motor 15 and the drag motor 16 of the test bench are arranged back to back.
[0028] Embodiment 2, Reference Figure 1 In a specific embodiment, the power compensation motor 1 is connected to the first mechanical power closed test box 5 through the first coupling 2 (such as a diaphragm coupling), and the loader 14 is connected to the first mechanical power closed test box 5 and the second mechanical power closed test box 11, respectively. The first mechanical power closed test box 5 is connected to the planet carrier flange of the first test box 7 through the first hollow coupling 6, and the second mechanical power closed test box 11 is connected to the planet carrier flange of the second test box 9 through the second hollow coupling 10. The above-mentioned parts and their relationships together constitute the mechanical power closed system of the test bench.
[0029] In a specific embodiment, the input end of the first electrical power closed test box 3 is connected to the loading motor 15, the output end of the first electrical power closed test box 3 is connected to the input sun gear of the first test box 7 through the second coupling 4 (such as a diaphragm coupling), the middle section of the second coupling 4 is arranged in the hollow output shaft of the first mechanical power closed test box 5 and the first hollow coupling 6, the output sun gear of the first test box 7 is connected to the output sun gear of the second test box 9 through the third coupling 8 (such as a diaphragm coupling), the input sun gear of the second test box 9 is connected to the output end of the second electrical power closed test box 13 through the fourth coupling 12 (such as a diaphragm coupling), the middle section of the fourth coupling 12 is arranged in the hollow output shaft of the second mechanical power closed test box 11 and the second hollow coupling 10, the input end of the second electrical power closed test box 13 is connected to the drag motor 16, and the power grid 18 supplies power to the loading motor 15 through the electrical system cabinet 17, while driving the drag motor 16 to generate electricity, and feeding the power back to the power grid 18 through the electrical system cabinet 17. The above-mentioned parts and their relationships together constitute the electrical power closed system of the test bench.
[0030] In the embodiment 3, the planet carrier rotates in two directions when the test bench is working, so the power flow of the test bench has two working modes.
[0031] Referring to Figure 2 , the first power flow transmission path is as follows:
[0032] The electric power closed system is shown by the hollow closed arrows in the figure, which is composed of the loading motor 15, the first electric power closed test box 3, the first mechanical power closed test box 5, the first test box 7, the second test box 9, the second mechanical power closed test box 11, the second electric power closed test box 13, the drag motor 16 and the power grid 18; the mechanical power closed system is shown by the closed arrows in the figure, which is composed of the power compensation motor 1, the first mechanical power closed test box 5, the first test box 7, the second test box 9, the second mechanical power closed test box 11, the loading device 14 and the first mechanical power closed test box 5.
[0033] Referring to Figure 3 , the second power flow transmission path is as follows:
[0034] The electric power closed system is shown by the hollow closed arrows in the figure, which is composed of the loading motor 15, the first electric power closed test box 3, the first mechanical power closed test box 5, the first test box 7, the second test box 9, the second mechanical power closed test box 11, the second electric power closed test box 13, the drag motor 16 and the power grid 18; the mechanical power closed system is shown by the closed arrows in the figure, which is composed of the power compensation motor 1, the first mechanical power closed test box 5, the first test box 7, the second test box 9, the second mechanical power closed test box 11, the loading device 14 and the first mechanical power closed test box 5.
[0035] Working principle: the functions of the mechanical power closed system and the electric power closed system are to reduce the test power loss and save the test cost while achieving the loading of the test box and the performance test working conditions. One set of mechanical power closed system and one set of electric power closed system are respectively set because the planet variable frequency speed regulating device has the characteristics of double input and single output and single input and double output, so two sets of loading systems are needed. When working, the two sets of systems respectively provide the corresponding running speed and torque according to the test working conditions. During the specific test, the power compensation motor 1, the loading motor 15 and the drag motor 16 are controlled to reach the test speed, and then the loading device 14 is controlled, and the loading motor 15 and the drag motor 16 are synchronously controlled to gradually load to the test torque.
[0036] The above has disclosed the preferred embodiments of the present application, but is not used to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed structure and technical content without departing from the scope of the technical scheme of the present application, and the equivalent embodiments with equivalent changes are all within the scope of the technical scheme of the present application.
Claims
1. A test platform for transmission performance combining electro-mechanical power in a closed loop, characterized in that: It includes a mechanical power closed system and an electric power closed system. The mechanical power closed system and the electric power closed system are connected by a test chamber and a test chamber to form a closed combined system to provide torque and power, and output the input power to generate electricity and feed it back to the grid.
2. The transmission performance test platform with closed-loop combination of electro-power and mechanical power according to claim 1, characterized in that: The mechanical power enclosure system includes a power compensation motor, a first mechanical power enclosure test chamber, a first test chamber, a second test chamber, and a second mechanical power enclosure test chamber. The output end of the power compensation motor is connected to the first mechanical power enclosure test chamber, and the loader is connected to both the first and second mechanical power enclosure test chambers. The first mechanical power enclosure test chamber is connected to the planetary carrier flange of the first test chamber, and the second mechanical power enclosure test chamber is connected to the planetary carrier flange of the second test chamber.
3. The transmission performance test platform with closed-loop combination of electro-power and mechanical power according to claim 2, characterized in that: The electrical power enclosure system includes a first electrical power enclosure test chamber, a first mechanical power enclosure test chamber, a first test chamber, a second electrical power enclosure test chamber, a loading motor, a drive motor, and an electrical system cabinet; The output terminal of the loading motor is connected to the input terminal of the first power closed test chamber. The output terminal of the first power closed test chamber is connected to the input sun gear of the first test chamber. The output sun gear of the first test chamber is connected to the output sun gear of the second test chamber. The input sun gear of the second test chamber is connected to the input terminal of the second power closed test chamber. The output terminal of the second power closed test chamber is connected to the input terminal of the drive motor. The drive motor is electrically connected to the electrical system cabinet. The electrical system cabinet feeds electrical energy back to the power grid.
4. The transmission performance test platform with closed-loop combination of electro-power and mechanical power according to claim 3, characterized in that: The power compensation motor is connected to the first mechanical power enclosed test box via the first coupling.
5. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 3, characterized in that: The first mechanical power enclosed test chamber is connected to the planetary carrier flange of the first test chamber via a first hollow coupling, and the second mechanical power enclosed test chamber is connected to the planetary carrier flange of the second test chamber via a second hollow coupling.
6. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 4, characterized in that: The output end of the first electrical power closed test chamber is connected to the input sun gear of the first test chamber through the second coupling. The middle section of the second coupling passes through the hollow output shaft of the first mechanical power closed test chamber and the first hollow coupling.
7. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 6, characterized in that: The output sun gear of the first test chamber is connected to the output sun gear of the second test chamber through the third coupling. The input sun gear of the second test chamber is connected to the output end of the second electric power closed test chamber through the fourth coupling. The middle section of the fourth coupling passes through the hollow output shaft of the second mechanical power closed test chamber and the second hollow coupling.
8. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 3, characterized in that: The power flow transmission path of the transmission performance test platform: The electrical power enclosure system consists of a loading motor, a first electrical power enclosure test chamber, a first mechanical power enclosure test chamber, a first test chamber, a second test chamber, a second mechanical power enclosure test chamber, a second electrical power enclosure test chamber, and a drive motor connected to the power grid. The mechanical power enclosure system consists of a power compensation motor, a first mechanical power enclosure test chamber, a loader, a second mechanical power enclosure test chamber, a second test chamber, a first test chamber, and a drive motor connected to the first mechanical power enclosure test chamber.
9. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 3, characterized in that: The power flow transmission path of the transmission performance test platform: The electrical power enclosure system consists of a loading motor, a first electrical power enclosure test chamber, a first mechanical power enclosure test chamber, a first test chamber, a second test chamber, a second mechanical power enclosure test chamber, a second electrical power enclosure test chamber, and a drive motor connected to the power grid. The mechanical power enclosure system consists of a power compensation motor, a first mechanical power enclosure test chamber, a first test chamber, a second test chamber, a second mechanical power enclosure test chamber, and a loader connected to the first mechanical power enclosure test chamber.
10. The transmission performance test platform for the closed combination of electro-power and mechanical power according to claim 7, characterized in that: The first, second, third, and fourth couplings are all diaphragm couplings.