A power drum drive system based on an embedded water jacket

Abstract

This utility model discloses a power drum drive system based on an embedded water jacket, including a permanent magnet motor and a gearbox. The gearbox contains a multi-stage planetary gear drive structure. The input shaft of the gearbox connects the permanent magnet motor and the multi-stage planetary gear drive structure, and the output end of the gearbox is connected to the power drum. A cooling mechanism is provided at the connection between the input shaft and the permanent magnet motor to cool the bearings and the multi-stage planetary gear drive structure within the gearbox. The cooling mechanism includes a hollow support shaft and an embedded water jacket concentrically arranged within the support shaft. This utility model directly separates the cooling medium chamber and the lubrication medium chamber inside the gearbox through the embedded water jacket. The structure is compact and facilitates equipment layout. Simultaneously, the cooling medium and lubrication medium are physically isolated for circulating heat exchange, enabling cyclic cooling of the gearbox and reducing heat power loss.

Description

Technical Field

[0001] This utility model relates to the field of material handling equipment technology, specifically to a power drum drive system based on an embedded water jacket. Background Technology

[0002] Material handling equipment such as cranes and belt conveyors generally use motors matched with gearboxes to drive power drums. To solve the heat dissipation problem of the gearbox, the following cooling methods are usually adopted.

[0003] Natural air cooling, forced air cooling, and circulating oil cooling are the main cooling methods. Natural air cooling has a relatively simple structure, requires no additional energy consumption, and is easy to maintain. However, it is generally suitable for low to medium power, intermittent operation, or ambient temperatures that are not high, but not for high power or continuous heavy-load operation. Forced air cooling systems have insufficient heat dissipation capacity under heavy load, continuous, and harsh operating conditions of cranes. Belt conveyor air cooling systems also have significant adaptability defects in industrial dust environments, as high concentrations of dust can easily cause blockages in the air cooling system. Circulating oil cooling requires the addition of an external cooling circulation device to the gearbox's lubrication system. The hot lubricating oil in the gearbox is forcibly extracted by an oil pump, requiring additional maintenance of coolers, oil pumps, and other accessories, resulting in increased equipment size and making it difficult to arrange in a space. Utility Model Content

[0004] Technical objective: To address the shortcomings of existing material handling equipment gearbox cooling methods, this utility model discloses a power drum drive system based on an embedded water jacket.

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

[0006] A power drum drive system based on an embedded water jacket includes a permanent magnet motor and a gearbox. The gearbox is equipped with a multi-stage planetary gear drive structure. The input shaft of the gearbox is connected to the permanent magnet motor (1) and the multi-stage planetary gear drive structure. The output end of the gearbox is connected to the power drum. A cooling mechanism is provided at the connection between the input shaft and the permanent magnet motor to cool the bearings and the multi-stage planetary gear drive structure in the gearbox. The cooling mechanism includes a hollow support shaft and an embedded water jacket concentrically arranged in the support shaft. The support shaft and the input shaft are rotated together by bearings. The embedded water jacket separates the space between the support shaft and the input shaft to form independent cooling medium chambers and lubrication medium chambers. A connecting hole is provided on the support shaft to communicate with the corresponding chambers for medium input and output.

[0007] Preferably, the embedded water jacket of this utility model has an annular structure with an L-shaped cross-section. The surface of the embedded water jacket near the input shaft is the first water jacket wall, and the surface on the other side is the second water jacket wall. A lubrication medium chamber is formed by the first water jacket wall, the permanent magnet motor wall, and the input shaft. The lubrication medium enters the gearbox from the lubrication medium chamber to lubricate and cool the bearings and the multi-stage planetary gear drive structure. A cooling medium chamber is formed between the second water jacket wall and the inner wall of the support shaft. The cooling medium exchanges heat with the outside in the cooling medium chamber.

[0008] Preferably, the connecting holes of the cooling medium chamber and the lubrication medium chamber of this invention are staggered in the circumferential direction of the support shaft.

[0009] Preferably, the support shaft of this utility model is fixed on the mounting base, and an output bearing seat for support is provided outside the support shaft. The support shaft and the output bearing seat are connected by a roller bearing. The output end of the multi-stage planetary gear drive structure is connected to the output bearing seat, and the transmission is performed by docking with the power drum through the flange face of the output bearing seat.

[0010] Preferably, the multi-stage planetary gear drive structure of this utility model includes several planetary gear trains. The carrier of the previous stage planetary gear train is rigidly connected to the sun gear of the next stage planetary gear train through a spline. The carrier of the last stage planetary gear train located at the very end is fixedly connected to the support shaft through a spline. The last stage gear ring is connected to the output bearing housing. The torque is output through the output bearing housing to drive the power drum to perform rotation.

[0011] Beneficial effects: The power drum drive system based on an embedded water jacket disclosed in this utility model has the following beneficial effects:

[0012] This invention uses an embedded water jacket to directly separate the cooling medium chamber and the lubrication medium chamber inside the gearbox. The structure is compact and easy to arrange. At the same time, the cooling medium and the lubrication medium are physically isolated and circulate for heat exchange, which can realize the circulatory cooling of the gearbox and reduce heat power loss. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0014] Figure 1 This is a cross-sectional view of the present invention along the communication port of the cooling medium chamber;

[0015] Figure 2 This is a cross-sectional view of the present invention along the communication port of the lubricating medium chamber;

[0016] Figure 3A schematic diagram showing the orientation of the connecting port on the support shaft of this utility model;

[0017] Among them, 1-permanent magnet motor, 2-multi-stage planetary gear drive structure, 3-input shaft, 4-support shaft, 5-embedded water jacket, 6-cooling medium chamber, 7-lubricating medium chamber, 8-first water jacket wall, 9-second water jacket wall, 10-output bearing seat, 11-roller bearing, 12-cooling medium inlet, 13-cooling medium outlet, 14-lubricating medium inlet, 15-lubricating medium outlet, 16-permanent magnet motor wall, 17-mounting base, 18-final stage rotating frame, 19-high-speed sun gear, 20-high-speed rotating frame, 21-high-speed internal gear ring, 22-high-speed planetary gear, 23-intermediate sun gear, 24-intermediate rotating frame, 25-intermediate planetary gear, 26-final stage sun gear, 27-final stage planetary gear, 28-final stage gear ring, 29-end cover. Detailed Implementation

[0018] Reference will now be made in detail to embodiments of the present disclosure, one or more of which are set forth herein. Each embodiment and example is provided by way of explanation of the apparatus, composition, and materials of the present disclosure, and not by way of limitation. Rather, the following description provides convenient illustrations for implementing exemplary embodiments of the present disclosure. Indeed, it will be apparent to those skilled in the art that various modifications and variations can be made to the teachings of the present disclosure without departing from the scope or spirit of the present disclosure.

[0019] like Figures 1-3As shown, this utility model discloses a power drum drive system based on an embedded water jacket, including a permanent magnet motor 1 and a gearbox. The gearbox houses a multi-stage planetary gear drive structure 2. The input shaft 3 of the gearbox connects the permanent magnet motor 1 and the multi-stage planetary gear drive structure 2. The permanent magnet motor 1 provides input torque and can be either an axial flux motor or a radial flux motor. The output end of the gearbox is connected to the power drum. A cooling mechanism is provided at the connection between the input shaft 3 and the permanent magnet motor 1 to cool the bearings inside the gearbox and the multi-stage planetary gear drive structure 2. The cooling mechanism includes a hollow support shaft 4 and an embedded water jacket 5 concentrically arranged within the support shaft 4. In this embodiment, the input shaft 3 needs to... The sun gear at the input end of the multi-stage planetary gear drive structure 2 is fixedly connected to the sun gear via a spline for power transmission. The support shaft 4 and the input shaft 3 are rotated together via bearings, providing support for the input shaft 3 and enhancing structural strength. At the same time, the space between the support shaft 4 and the end of the input shaft 3 near the permanent magnet motor 1 is separated by an embedded water jacket 5, forming independent cooling medium chamber 6 and lubrication medium chamber 7. The embedded water jacket 5 is preferably made of metal materials with good thermal conductivity, such as steel, aluminum, or copper. The cooling medium can be antifreeze such as ethylene glycol, deionized water, or a mixture of multiple cooling media. The lubrication medium is lubricating oil. The support shaft 4 is provided with connecting holes that communicate with the corresponding chambers for medium input and output.

[0020] Specifically, such as Figure 1 and Figure 2 As shown, the embedded water jacket 5 of this utility model has an annular structure with an L-shaped cross-section. The surface of the embedded water jacket 5 near the input shaft 3 is the first water jacket wall 8, and the surface on the other side is the second water jacket wall 9. The first water jacket wall 8, the permanent magnet motor wall 16, and the input shaft 3 form a lubrication medium chamber 7. The lubrication medium enters the gearbox from the lubrication medium chamber 7 to lubricate and cool the bearings and the multi-stage planetary gear drive structure. A cooling medium chamber 6 is formed between the second water jacket wall 9 and the inner wall of the support shaft 4. The cooling medium exchanges heat with the outside in the cooling medium chamber 6. The connecting holes of the cooling medium chamber 6 and the lubrication medium chamber 7 are staggered in the circumferential direction of the support shaft.

[0021] This utility model uses an embedded water jacket 5 to construct a dual-channel structure, forming independent cooling medium and lubrication medium channels. The channels are physically isolated from each other and can circulate in parallel, ensuring the cooling and lubrication effect on the bearings in the gearbox and the multi-stage planetary gear drive structure. At the same time, the cooling structure is integrated inside the support shaft, which can simplify the structural layout of the drive system and facilitate equipment installation and arrangement.

[0022] In this invention, the support shaft 4 is fixed to the mounting base 17. An output bearing seat 10 for support is provided outside the support shaft 4. The support shaft 4 and the output bearing seat 10 are connected by a roller bearing 11. The output end of the multi-stage planetary gear drive structure 2 is connected to the output bearing seat 10, and transmission is achieved through the flange face of the output bearing seat 10 docking with the power drum. Figure 3 As shown, the connecting holes of the cooling medium chamber 6 and the lubrication medium chamber 7 of this utility model are arranged in a staggered manner at a certain angle, including a cooling medium inlet 12, a cooling medium outlet 13, a lubrication medium inlet 14, and a lubrication medium outlet 15. The medium outlets are all located near the lower part of the support shaft 3, so that gravity can be used to assist the flow when the medium is transported. At the same time, the angle of the connecting port of the cooling and lubrication medium on the support shaft can be optimized according to the actual thermal management efficiency to achieve good lubrication and cooling efficiency of the gearbox.

[0023] The multi-stage planetary gear train drive structure 2 of this utility model includes several planetary gear trains. The sun gear of the first-stage planetary gear train is fixedly connected to the input shaft 3 by a spline. Along the power transmission direction, the carrier of the previous-stage planetary gear train is rigidly connected to the sun gear of the next-stage planetary gear train by a spline. In the embodiment of this utility model, the multi-stage planetary gear train drive structure is arranged according to... Figure 2 The arrangement shown from left to right utilizes a three-stage planetary gear system for speed reduction, including a high-speed planetary gear train, an intermediate planetary gear train, and a low-speed planetary gear train. The high-speed planetary gear train includes a high-speed sun gear 19, a high-speed carrier 20, a high-speed internal gear ring 21, and high-speed planet gears 22. The high-speed sun gear 19 is fixedly connected to the input shaft 3 via a spline. The intermediate planetary gear train includes an intermediate sun gear 23, an intermediate carrier 24, and intermediate planet gears 25. The intermediate sun gear 23 is fixedly connected to the high-speed carrier 20 via a spline. The low-speed planetary gear train is located at the very end and includes a final-stage carrier 18, a final-stage sun gear 26, a final-stage planet gear 27, and a final-stage gear ring 28. The final-stage sun gear 26 is fixedly connected to the intermediate carrier 24 via a spline. The intermediate planetary gear train and the low-speed planetary gear train share the final stage gear ring 28. The high-speed internal gear ring 21 is connected to the final stage gear ring 28 and the end cover 29, which is located at the end of the gearbox and is used to seal the environment with the gear ring, by bolts. The final stage rotating frame 18 is fixedly connected to the support shaft 4 by splines. The final stage gear ring 28 is connected to the output bearing housing 10. The final stage gear ring 28, the high-speed internal gear ring 21, and the end cover 29 rotate as a whole at low speed. The torque is output through the output bearing housing 10 to drive the power drum to perform rotation. In specific use, those skilled in the art can select the appropriate planetary gear train structure according to the requirements, such as using a three-stage planetary transmission or a two-stage planetary transmission.

[0024] In use, the drive system of this invention utilizes a permanent magnet motor to provide input torque, which is transmitted and amplified via a multi-stage planetary gear drive structure. This drives the drive drum to rotate, allowing the cooling medium to be pre-cooled by an external cooling device. The medium then enters through the cooling medium inlet 12 and exits through the cooling medium outlet 13, thus absorbing and carrying away heat. The lubricating oil, after pre-cooling, flows in through the lubricating medium inlet 14, first lubricating and cooling the two bearings on the input shaft, effectively suppressing bearing temperature rise. It then enters the multi-stage planetary gear train to lubricate and cool the gears and bearings, finally exiting through the lubricating medium outlet 15. An embedded water jacket 5 physically isolates the cooling medium and lubricating medium, allowing for parallel circulation. This non-contact heat exchange and synergistic cooling of the two media effectively regulates the thermal load of the electric drive system, thereby improving the energy transfer efficiency and extending the service life of the drive system.

[0025] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power drum drive system based on an embedded water jacket, characterized in that, The gearbox includes a permanent magnet motor (1) and a gearbox. The gearbox is equipped with a multi-stage planetary gear drive structure (2). The input shaft (3) of the gearbox is connected to the permanent magnet motor (1) and the multi-stage planetary gear drive structure (2). The output end of the gearbox is connected to a power drum. A cooling mechanism is provided at the connection between the input shaft (3) and the permanent magnet motor (1) to cool the bearings and the multi-stage planetary gear drive structure (2) in the gearbox. The cooling mechanism includes a hollow support shaft (4) and an embedded water jacket (5) concentrically arranged in the support shaft (4). The support shaft (4) and the input shaft (3) are rotated through the bearing. The embedded water jacket (5) separates the space between the support shaft (4) and the input shaft (3) to form independent cooling medium chambers (6) and lubrication medium chambers (7). The support shaft (4) is provided with a connecting hole that communicates with the corresponding chamber for medium input and output.

2. A power drum drive system based on an embedded water jacket according to claim 1, characterized in that, The embedded water jacket (5) is an annular structure with an L-shaped cross-section. The surface of the embedded water jacket (5) on the side closest to the input shaft (3) is the first water jacket wall (8), and the surface on the other side is the second water jacket wall (9). The lubricating medium chamber (7) is formed by the first water jacket wall (8), the permanent magnet motor wall (16), and the input shaft (3). The lubricating medium enters the gearbox from the lubricating medium chamber (7) to cool the bearings and the multi-stage planetary gear drive structure. A cooling medium chamber (6) is formed between the second water jacket wall (9) and the inner wall of the support shaft (4), and the cooling medium exchanges heat with the outside in the cooling medium chamber (6).

3. An inline water jacket based power drum drive system as claimed in claim 2, wherein, The connecting holes of the cooling medium chamber (6) and the lubricating medium chamber (7) are offset from each other in the circumferential direction of the support shaft.

4. A power drum drive system based on an embedded water jacket according to claim 3, characterized in that, The support shaft (4) is fixed on the mounting base (17). An output bearing seat (10) is set outside the support shaft (4). The support shaft (4) and the output bearing seat (10) are connected by a roller bearing (11). The output end of the multi-stage planetary gear drive structure (2) is connected to the output bearing seat (10). The power drum is connected to the flange face of the output bearing seat (10) for transmission.

5. An inline water jacket based power drum drive system as claimed in claim 4, wherein, The multi-stage planetary gear drive structure (2) includes several planetary gear trains. The carrier of the previous stage planetary gear train is rigidly connected to the sun gear of the next stage planetary gear train through a spline. The carrier (18) of the last stage planetary gear train is fixedly connected to the support shaft (4) through a spline. The last stage gear ring (28) is connected to the output bearing housing (10). The torque is output through the output bearing housing (10) to drive the power drum to perform rotation.

Images