A high-speed electric motor electric braking mechanism

Abstract

This utility model discloses a high-speed motor electric braking mechanism, relating to the field of motor connection technology. It includes an expansion unit, a compression unit, and a generator. The expansion unit and compression unit are coaxially arranged, and the generator is connected between and to both units. The expansion unit includes an expansion end volute and an expansion end impeller, and the compression unit also includes a compression end volute and a compression end impeller. The expansion end impeller is located inside the expansion end volute and rotatably connected to it, while the compression end impeller is located inside the compression end volute near the generator and rotatably connected to it. This expander, with its power balancing function, facilitates balancing the power difference between the expansion and compression units by adding a generator, thereby improving transmission efficiency and overall work efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of high-speed motors, and in particular to an electric braking mechanism using a high-speed motor. Background Technology

[0002] Cold-pressurized expanders often experience speed and efficiency mismatches due to significant parameter differences between initial start-up conditions and designed operating conditions. This not only prolongs start-up time but can also lead to overspeeding and equipment damage. Current solutions involve adding a hydraulic brake. This utilizes a series of labyrinth structures installed in the shaft system, through which pressurized and controlled-flow lubricating oil is introduced. As the shaft rotates at high speed, the lubricating oil flows rapidly within a relatively small space. Its viscosity and relative speed create friction, generating resistance and achieving a braking effect. This effectively limits the speed.

[0003] However, this method requires not only a well-designed labyrinth seal based on the design parameters of the cold-pressurized expander, but also a sophisticated oil system to control the flow and pressure of the lubricating oil according to actual operational needs. Improper control can easily lead to excessively high speeds or sudden deceleration. Furthermore, hydraulic braking also causes the lubricating oil temperature to rise. Under high-demand hydraulic braking, an additional oil cooler is needed, causing unnecessary losses and increasing equipment costs. Moreover, these losses are converted into heat, which cannot be effectively recovered and reused, requiring additional equipment to cool this heat, meaning that in addition to the initial losses, extra costs are incurred to handle them. Therefore, the requirements for lubricating oil are very high. Daily maintenance and operation of the product have strict requirements for oil pressure, oil supply, and oil temperature, especially oil pressure. The oil pressure needs to be constantly controlled to determine the required braking force, making daily use and maintenance very troublesome, further increasing operating costs, and also raising manufacturing costs.

[0004] Therefore, we propose a high-speed electric motor braking mechanism. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a high-speed motor electric braking mechanism. In order to achieve appropriate speed control and effectively recover these losses, this solution employs a high-speed motor electric braking system to control the speed and convert braking force into electrical output to recover this energy. Furthermore, because the speed is controllable, a better match between speed and efficiency can be achieved, while also shortening the start-up and debugging time, thus achieving multiple benefits.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A high-speed electric motor braking mechanism includes

[0010] The system comprises an expansion unit, a compression unit, and a generator. The expansion unit and the compression unit are coaxially arranged, and the generator is connected between and to both the expansion unit and the compression unit. The expansion unit includes an expansion end volute and an expansion end impeller.

[0011] The compression unit also includes a compression end volute and a compression end impeller. The expansion end impeller is located inside the expansion end volute near the end of the generator and is rotatably connected to the expansion end volute.

[0012] The impeller at the compression end is located inside the compression end volute near the end of the generator and is rotatably connected to the compression end volute.

[0013] Preferably, the generator has an expansion end shaft inside. The length direction of the expansion end shaft has a toothed surface on the end face facing the expansion end impeller. The back axis of the expansion end impeller is meshed with the generator expansion end shaft body through the toothed surface. A locking bolt is fixedly installed at the center of the expansion end impeller. The length direction of the generator expansion end shaft also has a recessed threaded hole on the end facing the expansion end impeller. One end of the locking bolt is inserted into the threaded hole and threadedly engaged with it, thereby realizing the transmission connection between the expansion end impeller and the generator expansion end shaft.

[0014] Preferably, a generator compression end shaft is also provided at the end of the generator near the compression end volute. The generator compression end shaft and the compression end impeller are connected together by a compression end impeller connecting bolt that passes through the compression end impeller, thereby realizing the transmission connection between the compression end impeller and the generator compression end shaft.

[0015] Preferably, an expansion end flange connecting plate is connected to one end of the expansion end volute corresponding to the generator, and a compression end flange connecting plate is also connected to one end of the compression end volute corresponding to the generator. The two ends of the generator are respectively connected and installed together with the expansion end flange connecting plate and the compression end flange connecting plate, thereby realizing the connection between the generator and the expansion end volute and the compression end volute.

[0016] Preferably, an expansion end bearing sleeve is also installed inside the expansion end flange connecting plate, and an expansion end labyrinth seal is formed on the inner wall of the expansion end bearing sleeve. The expansion end bearing sleeve achieves a sealed fit with the generator expansion end shaft through the expansion end labyrinth seal.

[0017] Preferably, a compression end bearing sleeve is also installed inside the compression end flange connecting plate, and a compression end labyrinth seal is also formed on the inner wall of the compression end bearing sleeve. The compression end bearing sleeve achieves a sealed fit with the generator compression end shaft through the compression end labyrinth seal.

[0018] Preferably, a locking nut is provided on the locking bolt. The locking nut is fixedly installed at the end of the expansion impeller away from the generator. The expansion impeller and the locking nut are installed together, and the locking bolt is fixedly installed on the expansion impeller through the locking nut.

[0019] Preferably, the expansion unit further includes a nozzle pressure plate disposed inside the expansion end volute, on which a plurality of nozzles are arranged at circumferential intervals.

[0020] Preferably, the expansion end impeller and the compression end impeller are made of alloy material.

[0021] (III) Beneficial Effects

[0022] 1. By adopting a high-speed motor that can control a fixed speed (fixed frequency), the technology effectively solves the problem that in existing technologies, the speed needs to be constantly controlled by adjusting the amount and pressure of lubricating oil. This achieves the advantage of being able to conveniently, quickly, effectively, and actively control the optimal operating speed.

[0023] 2. Due to the adoption of high-speed direct-drive motor power recovery technology, the technical problem of energy waste generated by hydraulic braking in the existing hydraulic braking system is effectively solved, thereby realizing the conversion of this braking power into power generation power through a high-speed motor.

[0024] 3. Due to the adoption of high-speed direct-drive motor power recovery technology, the design problem of needing to increase the size of the cooler due to the excess braking heat generated by the oil brake in the existing oil brake system is effectively solved, thereby realizing the requirement of treatment equipment that can save excess waste heat. Attached Figure Description

[0025] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0026] Figure 1This is an overall structural diagram of a high-speed motor electric braking mechanism according to the present invention;

[0027] Figure 2 This is an assembly diagram of the impeller of a cold-charged high-speed motor.

[0028] Legend:

[0029] 1. Generator; 2. Expansion end volute; 3. Compression end volute; 4. Expansion end large flange; 5. Wheel back seal; 6. Labyrinth seal; 7. Nozzle cover plate; 8. Expansion end impeller; 9. Nozzle support ring; 10. Large insulation board; 11. Expansion end impeller tie rod bolt; 12. Expansion end impeller locking nut; 13. Pressure boosting end large flange; 14. Pressure boosting end impeller tie rod bolt; 15. Pressure boosting end impeller locking nut; 16. Wheel back seal; 17. Compression end impeller. Detailed Implementation

[0030] This application provides a high-speed motor electric braking mechanism to solve the problem of brake energy recovery in the prior art. In order to obtain a suitable speed control method and effectively recover these losses, this solution uses a high-speed motor electric brake to control the speed and convert braking force into electrical output to recover this energy. Furthermore, since the speed can be controlled, a better match between speed and efficiency can be achieved, while also shortening the start-up and debugging time, achieving multiple benefits.

[0031] Example 1

[0032] The technical solution in this application embodiment is to solve the above-mentioned problem of brake energy recovery, and the overall idea is as follows:

[0033] To address the problems existing in the prior art, this utility model provides a high-speed motor electric braking mechanism, including...

[0034] The cold-charged expander includes an expansion unit, a compression unit, and a generator 1. The expansion unit and the compression unit are coaxially arranged, and the generator 1 is connected between and to both the expansion unit and the compression unit. The expansion unit includes an expansion end volute 2 and an expansion end impeller 8.

[0035] The compression unit also includes a compression end volute 3 and a compression end impeller 17. The expansion end impeller 8 is disposed inside the expansion end volute 2 near the end of the generator 1 and is rotatably connected to the expansion end volute 2.

[0036] The compression end impeller 17 is located inside the compression end volute 3 near the end of the generator 1 and is rotatably connected to the compression end volute 3.

[0037] The generator 1 is equipped with a generator expansion end shaft 21. The generator expansion end shaft has a toothed surface on the end face facing the expansion end impeller 8 along its length. The back axis of the expansion end impeller is meshed with the generator expansion end shaft body through the toothed surface. A locking bolt 11 is fixedly inserted at the center of the expansion end impeller 8. The generator expansion end shaft also has a threaded hole recessed inward on the end facing the expansion end impeller 8 along its length. One end of the locking bolt 11 is inserted into the threaded hole and threadedly engaged with it, thereby realizing the transmission connection between the expansion end impeller 8 and the generator expansion end shaft.

[0038] A generator compression end shaft is also provided at the end of the generator 1 near the compression end volute 3. The generator compression end shaft is connected to the compression end impeller 17 by a compression end impeller connecting bolt 14 that passes through the compression end impeller 17, thereby realizing the transmission connection between the compression end impeller 17 and the generator compression end shaft.

[0039] An expansion end flange connecting plate 4 is connected to one end of the expansion end volute 2 corresponding to the generator 1, and a compression end flange connecting plate 13 is also connected to one end of the compression end volute 3 corresponding to the generator. The two ends of the generator 1 are respectively connected and installed together with the expansion end flange connecting plate 4 and the compression end flange connecting plate 13, thereby realizing the connection between the generator 1 and the expansion end volute 2 and the compression end volute 3.

[0040] An expansion end bearing sleeve 5 is also installed inside the expansion end flange connecting plate 4, and an expansion end labyrinth seal 6 is formed on the inner wall of the expansion end bearing sleeve 5. The expansion end bearing sleeve 5 achieves a sealing fit with the generator expansion end shaft through the expansion end labyrinth seal 6.

[0041] Similarly, a compression end bearing sleeve 16 is also installed inside the compression end flange connecting plate 13, and a compression end labyrinth seal is also formed on the inner wall of the compression end bearing sleeve 16. The compression end bearing sleeve 16 achieves a sealed fit with the generator compression end shaft through the compression end labyrinth seal.

[0042] Airflow mechanism: An expansion end volute is provided inside the expansion end volute 2, and an expansion end air inlet connected to the expansion end volute is also provided on the expansion end volute 2. An expansion end air outlet corresponding to the expansion end impeller is also provided inside the expansion end volute, and the expansion end air outlet extends in a direction parallel to the axial direction of the expansion end volute body. Similarly, a compression end volute is also provided inside the compression end volute, and a compression end air inlet connected to the compression end volute is also provided on the compression end volute. A compression end air outlet corresponding to the compression end impeller is also provided inside the compression end volute, and the compression end air outlet also extends in a direction parallel to the axial direction of the compression end volute body.

[0043] A locking nut 12 is provided on the locking bolt 11. The locking nut 12 is fixedly installed at the end of the expansion impeller 8 away from the generator 1. The expansion impeller 8 is installed together with the locking nut. The locking bolt 11 is fixedly installed on the expansion impeller 8 by the locking nut 12.

[0044] The expansion unit also includes a nozzle pressure plate 7 disposed inside the expansion end volute 2, on which a plurality of nozzles are arranged at intervals along the circumference.

[0045] The expansion end impeller 8 and the compression end impeller 17 are made of alloy material.

[0046] In practice, this solution replaces the traditional hydraulic brake structure with a high-speed motor. A high-speed motor is integrated into the intermediate shaft system, and the operating speed is limited by the frequency of the inverter cabinet. When the power source is insufficient, the high-speed motor functions as a generator, providing additional power to keep the speed running at a higher efficiency. Conversely, when there is an excess of power, the high-speed motor acts as a generator, not only controlling the speed but also recovering the extra power for electricity generation. This allows the equipment to reach the required operating conditions in a shorter time without causing additional mechanical damage and preventing damage caused by overspeeding.

[0047] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A high-speed electric motor braking mechanism, comprising an expansion unit, a compression unit, and a generator (1), characterized in that: The expansion unit and the compression unit are coaxially arranged, and the generator (1) is connected between the expansion unit and the compression unit and is connected to both; wherein, the expansion unit includes an expansion end volute (2) and an expansion end impeller (8). The compression unit also includes a compression end volute (3) and a compression end impeller (17). The expansion end impeller (8) is located inside the expansion end volute (2) near the end of the generator (1) and is rotatably connected to the expansion end volute (2). The compression end impeller (17) is located inside the compression end volute (3) near the end of the generator (1) and is rotatably connected to the compression end volute (3).

2. The electric braking mechanism using a high-speed motor as described in claim 1, characterized in that: The generator (1) is provided with a generator expansion end shaft (21). The generator expansion end shaft has a shaft tooth surface on the end face facing the expansion end impeller (8) along its length direction. The back axis of the expansion end impeller (8) is meshed with the generator expansion end shaft body through the shaft tooth surface. A locking bolt (11) is fixedly installed at the center of the expansion end impeller (8). The generator expansion end shaft also has a shaft thread hole recessed inward on the end facing the expansion end impeller (8) along its length direction. One end of the locking bolt (11) is inserted into the shaft thread hole and threadedly engaged with it.

3. The electric braking mechanism using a high-speed motor as described in claim 2, characterized in that: A generator compression end shaft is also provided at the end of the generator (1) near the compression end volute (3). The generator compression end shaft is connected to the compression end impeller (17) by a compression end impeller connecting bolt (14) that passes through the compression end impeller (17).

4. The electric braking mechanism using a high-speed motor as described in claim 1, characterized in that: An expansion end flange connecting plate (4) is connected to one end of the expansion end volute (2) corresponding to the generator (1), and a compression end flange connecting plate (13) is also connected to one end of the compression end volute (3) corresponding to the generator. The two ends of the generator (1) are respectively connected and installed together with the expansion end flange connecting plate (4) and the compression end flange connecting plate (13).

5. The electric braking mechanism using a high-speed motor as described in claim 4, characterized in that: An expansion end bearing sleeve (5) is also installed inside the expansion end flange connecting plate (4), and an expansion end labyrinth seal (6) is formed on the inner wall of the expansion end bearing sleeve (5).

6. The electric braking mechanism using a high-speed motor as described in claim 4, characterized in that: A compression end bearing sleeve (16) is also installed inside the compression end flange connecting plate (13), and a compression end labyrinth seal is also formed on the inner wall of the compression end bearing sleeve (16).

7. The electric braking mechanism using a high-speed motor as described in claim 3, characterized in that: A locking nut (12) is provided on the locking bolt (11). The locking nut (12) is fixedly installed on the end of the expansion impeller (8) away from the generator (1). The expansion impeller (8) is installed together with the locking nut. The locking bolt (11) is fixedly installed on the expansion impeller (8) by the locking nut (12).

8. The electric braking mechanism using a high-speed motor as described in claim 1, characterized in that: The expansion unit also includes a nozzle pressure plate (7) disposed inside the expansion end volute (2), on which a plurality of nozzles are arranged at intervals along the circumference.

9. The electric braking mechanism using a high-speed motor as described in claim 7, characterized in that: The expansion end impeller (8) and the compression end impeller (17) are made of alloy material.

Images