High-speed power shaft unit with oil mist cooling

Abstract

This utility model relates to the field of high-speed power shaft cooling technology, and more particularly to a high-speed power shaft device using oil mist cooling. It includes a bracket fixed to a test platform, the bracket having a shaft hole. A power shaft mounting seat and a reducer mounting plate are respectively fixed to the sides of the bracket at both ends of the shaft hole. The power shaft mounting seat and the reducer mounting plate are coaxial. The power shaft is rotatably mounted on the power shaft mounting seat via two high-speed bearings. It also includes an oil mist cooling system that directly sprays oil mist onto the high-speed bearings. This utility model rapidly cools the bearings by directly spraying oil mist onto them and quickly extracting the heat-absorbing waste oil, thus preventing high-temperature bearing failure due to high-speed rotation and preventing the accumulation of lubricating oil inside the bearings, which could obstruct rotation.

Description

Technical Field

[0001] This utility model relates to the field of high-speed power shaft cooling technology, and in particular to a high-speed power shaft device using oil mist cooling. Background Technology

[0002] The operational testing of high-speed gearboxes requires a high-speed motor drive. To minimize the impact of transmission components (e.g., the more transmission components involved, the harder it is to improve accuracy, and flexible connections can cause lag), a rigid shaft connection is used between the gearbox and the motor. However, both are very expensive, especially the high-speed motor, which costs tens of millions of yuan. Therefore, to protect the high-speed motor, the two are connected via a drive shaft. This reduces the risk of decreased accuracy of the testing equipment due to repeated installations or problems with the test component, and also prevents damage to the high-speed motor. Therefore, the operational testing bench for high-speed gearboxes rigidly connects the drive shaft and the high-speed motor. As a testing device, each installation of the gearbox under test will not affect the high-speed motor, thus protecting it as much as possible.

[0003] Because the drive shaft is directly connected to the high-speed motor, its rotational speed is equal to the output speed of the high-speed motor, which is 20,000 revolutions per minute or higher. If the bearings supporting the high-speed rotating drive shaft are made of grease or immersed in coolant, not only will the rotational speed be hindered, but the excessive heat generated at high speeds will also cause the grease or coolant to boil rapidly, losing its lubricating effect and even creating safety hazards. Air cooling is also too inefficient. Therefore, only flowing liquid can carry away heat through the bearings. To improve cooling efficiency and avoid hindering the rotation of the drive shaft, oil mist spraying is the only method of cooling. How to use oil mist cooling to ensure the normal and efficient operation of the drive shaft device is the problem that needs to be solved in this case. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a high-speed power shaft device that uses oil mist cooling. This device uses non-sealed high-speed bearings to support both ends of the power shaft, sprays high-pressure oil mist onto the bearings, and promptly removes the oil mist from the bearings, thereby achieving rapid heat dissipation and ensuring the normal operation of the power shaft.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a high-speed power shaft device with oil mist cooling, including a bracket fixed to a test platform, the bracket having a shaft hole, a power shaft mounting seat and a reducer mounting plate respectively fixed to the sides of the bracket at both ends of the shaft hole, the power shaft mounting seat and the reducer mounting plate being coaxial, and the power shaft being rotatably mounted on the power shaft mounting seat through two high-speed bearings; an oil mist cooling system is also provided, the oil mist cooling system including an operation box, an oil tank for holding cooling oil on the top of the operation box, an oil pump and an electronic control knob for controlling the oil pump switch and power inside the operation box, the power shaft mounting seat having an oil inlet and an oil outlet connected from the outer wall to the high-speed bearing, the front end of the oil inlet being an atomizing nozzle, the oil pump inlet being connected to the oil tank through an oil pipe, and the oil pump outlet being connected to the oil inlet through an oil pipe.

[0006] Preferably, the power shaft mounting base is fixedly connected to the high-speed motor via a flexible coupling.

[0007] Preferably, the two ends of the power shaft are provided with connecting splines.

[0008] Preferably, each high-speed bearing is provided with two oil inlets, and the outer ring of the high-speed bearing is provided with three radial through holes. The two upper through holes are symmetrically arranged on both sides of the vertical symmetry plane of the high-speed bearing at an angle of 60° to 120°. The two oil inlets extend into the two through holes to spray oil onto the rollers. The third through hole is located at the lowest position of the high-speed bearing, and the oil outlet is located in the third through hole.

[0009] Preferably, the power shaft mounting base is equipped with a temperature sensor for monitoring the temperature of the power shaft.

[0010] Preferably, the oil outlet is connected to the waste oil tank via an oil pipe, and an oil pumping device is installed on the oil pipe.

[0011] Preferably, an oil filter is provided at the bottom of the oil tank, and the oil filter is connected to the oil inlet of the oil pump through an oil pipe.

[0012] Preferably, a pressure gauge is fixed to the outer wall of the control box, and the pressure gauge is connected in series with an oil pipe that connects the oil pump and the oil inlet.

[0013] The beneficial effects of this utility model are as follows: A high-speed power shaft device employing oil mist cooling includes a bracket fixed to a test platform. The bracket has a shaft hole, and a power shaft mounting seat and a reducer mounting plate are respectively fixed to the sides of the bracket at both ends of the shaft hole. The power shaft mounting seat and the reducer mounting plate are coaxial, and the power shaft is rotatably mounted on the power shaft mounting seat via two high-speed bearings. An oil mist cooling system is also provided, including an operation box. The top of the operation box has an oil tank for holding cooling oil. Inside the operation box is an oil pump and an electronic control knob for controlling the oil pump's switch and power. The power shaft mounting seat has an oil inlet channel and an oil outlet channel connecting to the high-speed bearing from its outer wall. The oil pump's inlet is connected to the oil tank via an oil pipe, and the oil pump's outlet is connected to the inlet channel via an oil pipe. This utility model directly sprays oil mist onto the high-speed bearing and quickly extracts the waste oil that has absorbed heat, thereby rapidly cooling the bearing, preventing high-temperature failure caused by high-speed rotation, and also preventing the accumulation of lubricating oil inside the bearing, which could obstruct the rotating parts. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the high-speed power shaft device using oil mist cooling according to this utility model; Figure 2 yes Figure 1 Enlarged view of part A in the image; Figure 3 This is a main sectional view of the high-speed power unit; Figure 4 This is a top view of the high-speed power shaft assembly; Figure 5 This is the front view of the oil mist cooling system.

[0015] Explanation of reference numerals in the attached figures: 1—Bracket, 2—Drive shaft mounting base, 3—Gearbox mounting plate, 4—High-speed bearing, 5—Drive shaft, 6—Oil mist cooling system, 61—Control box, 62—Oil tank, 63—Oil pump, 64—Electrical control knob, 65—Oil inlet, 66—Oil outlet, 67—Oil filter, 68—Pressure gauge. Detailed Implementation

[0016] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the present invention.

[0017] like Figures 1-5As shown, the high-speed power shaft device using oil mist cooling in this embodiment includes a bracket 1 fixed to the test platform. The bracket 1 has a shaft hole, and a power shaft mounting seat 2 and a reducer mounting plate 3 are respectively fixed to the sides of the bracket at both ends of the shaft hole. The power shaft mounting seat 2 and the reducer mounting plate 3 are coaxial. The power shaft mounting seat 2 rotatably mounts the power shaft 5 through two high-speed bearings 4. The power shaft mounting seat 2 is a round tube with flanges at both ends. One flange is fixedly connected to the bracket 1 by screws, and the other flange is connected to a flexible coupling by screws. The flexible coupling is then fixedly connected to the mounting flange of the high-speed motor by screws. In this way, the power shaft 5 only needs to be splined at both ends to connect to the output shaft of the high-speed motor and the input shaft of the reducer, thereby reducing the connection constraints of the rotating shaft, simplifying installation, reducing the size of the rotating shaft, reducing the high-speed rotation load, enhancing the smooth operation of the rotating shaft, and reducing vibration.

[0018] The high-speed bearing 4 has bearing caps at both ends, which abut against the outer ring of the high-speed bearing 4 and are threadedly connected to the power shaft mounting seat 2.

[0019] An oil mist cooling system 6 is also provided, which includes an operation box 61. The top of the operation box 61 is provided with an oil tank 62 for holding cooling oil. Inside the operation box 61, there is an oil pump 63 and an electronic control knob 64 for controlling the switch and power of the oil pump 63. The power shaft mounting base 2 is provided with an oil inlet 65 and an oil outlet 66 that are connected from the outer wall to the high-speed bearing 4. The front end of the oil inlet 65 is an atomizing nozzle. The oil inlet of the oil pump 63 is connected to the oil tank 62 through an oil pipe, and the oil outlet of the oil pump 63 is connected to the oil inlet 65 through an oil pipe.

[0020] The outer ring of the high-speed bearing 4 and the power shaft mounting base 2 are provided with three through holes running radially through them. The upper two through holes contain oil inlets 65, and the lower through hole contains an oil outlet 66. Both the oil inlets 65 and the oil outlet 66 are connected to the roller cavity of the high-speed bearing 4. The two upper oil inlets 65 are symmetrically positioned at a 90° angle on both sides of the vertical plane of symmetry of the high-speed bearing 4, directly spraying oil onto the rollers. The lower through hole is located at the lowest point of the high-speed bearing 4, facilitating the extraction of waste oil from the oil outlet 66.

[0021] This embodiment uses external fixing components to reduce the connection constraints of the rotating shaft, thereby facilitating installation and reducing the size of the shaft, and improving the dynamic load balance of the rotating shaft. In addition, coolant is sprayed directly onto the rollers of the high-speed bearing 4 using oil mist, and an oil extraction device is set on the oil pipe connected to the oil outlet 65 to quickly remove waste oil, thereby achieving rapid cooling and preventing liquid accumulation in the bearing cavity, thus avoiding obstruction to the rotating mechanism.

[0022] In addition, this embodiment also includes the following devices to monitor and improve the cooling effect.

[0023] In order to monitor the temperature of the power shaft 5 at all times, the power shaft mounting base 2 is equipped with a temperature sensing probe for monitoring the temperature of the power shaft; the probe is a non-contact temperature sensing probe, such as infrared temperature measurement.

[0024] In order to prevent impurities in the coolant from entering the high-speed bearing 4, an oil filter device 67 is provided at the bottom of the oil tank 62, and the oil filter device 67 is connected to the oil inlet of the oil pump 63 through an oil pipe.

[0025] To facilitate adjustment of the power of the oil pump 63, a pressure gauge 68 is fixed to the outer wall of the control box 61. The pressure gauge 68 is connected in series with the oil pipe connecting the oil pump 63 and the oil inlet 65. In this way, the power of the oil pump 63 can be adjusted by the electronic control knob 64, which is electrically connected to the oil pump 63, based on the coolant pressure in the oil pipe displayed by the pressure gauge 68.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model, and for the convenience of describing the technical solution, the front, back, left, right, top, middle, and bottom orientations are based on the accompanying drawings and are not a limitation on the protection scope of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the essence and scope of the technical solution of this utility model.

Claims

1. A high-speed power shaft device employing oil mist cooling, characterized in that: The system includes a bracket fixed to the test platform, the bracket having a shaft hole, and a power shaft mounting seat and a reducer mounting plate fixed to the sides of the bracket at both ends of the shaft hole, respectively. The power shaft mounting seat and the reducer mounting plate are coaxial, and the power shaft is rotatably mounted on the power shaft mounting seat via two high-speed bearings. It also includes an oil mist cooling system, which includes an operating box. The top of the operating box has an oil tank for holding cooling oil. Inside the operating box is an oil pump and an electronic control knob for controlling the oil pump's switch and power. The power shaft mounting seat has an oil inlet and an oil outlet connected to the high-speed bearings from its outer wall. The front end of the oil inlet is an atomizing nozzle. The oil pump's inlet is connected to the oil tank via an oil pipe, and the oil pump's outlet is connected to the oil inlet via an oil pipe.

2. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: The power shaft mounting base is fixedly connected to the high-speed motor via a flexible coupling.

3. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: The power shaft is provided with connecting splines at both ends.

4. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: Each of the high-speed bearings is provided with two oil inlets. The outer ring of the high-speed bearing is provided with three radial through holes. The two upper through holes are symmetrically arranged on both sides of the vertical symmetry plane of the high-speed bearing at an angle of 60° to 120°. The two oil inlets extend into the two through holes to spray oil onto the rollers. The third through hole is located at the lowest position of the high-speed bearing, and the oil outlet is located in the third through hole.

5. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: The power shaft mounting base is equipped with a temperature sensor to monitor the temperature of the power shaft.

6. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: The oil outlet is connected to the waste oil tank via an oil pipe, and an oil pumping device is installed on the oil pipe.

7. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: An oil filter is installed at the bottom of the oil tank, and the oil filter is connected to the oil inlet of the oil pump through an oil pipe.

8. The high-speed power shaft device with oil mist cooling according to claim 1, characterized in that: A pressure gauge is fixed to the outer wall of the control box, and the pressure gauge is connected in series with the oil pipe that connects the oil pump and the oil inlet.

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