A coaxial device for roll drive and roll passage of hot oil for continuous hot presses

Abstract

The present application relates to the technical field of continuous press temperature control, in particular to a coaxial device for roller driving and roller oil conduction of a continuous hot press, which comprises a transmission shaft, an oil conduction channel is arranged in the transmission shaft, an inlet and an outlet are arranged on the transmission shaft and communicated with the oil conduction channel, and an oil pressure slip ring is arranged on the transmission shaft, the oil pressure slip ring comprises an inner ring and an outer ring, the inner ring is fixed on the transmission shaft, the outer ring is arranged outside the inner ring, and the inner ring and the outer ring can rotate relative to each other; a first oil inlet communicated with the inlet and a first oil outlet communicated with the outlet are arranged on the inner ring, a first oil guide groove communicated with the first oil inlet and a second oil guide groove communicated with the first oil outlet are arranged on the inner wall of the outer ring, a second oil inlet communicated with the first oil guide groove and a second oil outlet communicated with the second oil guide groove are arranged on the outer ring. When the heat conduction oil is introduced into the driving roller, the high temperature of the motor and the speed reducer is avoided, and the design difficulty is reduced.

Description

Technical Field

[0001] This invention relates to the technical field of temperature control for continuous presses, and in particular to a coaxial device for roller drive and roller heat transfer oil flow in a continuous hot press. Background Technology

[0002] High-temperature circulating heat transfer oil needs to be injected into the drive roller of a continuous press to preheat the drive roller. The usual method is to drill two holes along the axial direction on the end face of the drive roller shaft, one oil inlet and one oil outlet, and connect the oil inlet and outlet with pipes to achieve the circulation function of the heat transfer oil.

[0003] The driven side of the drive roller is also connected to a motor and a reducer to drive the roller. Therefore, when drilling oil inlet and outlet holes in the cross-section of the drive roller shaft, the output shaft of the motor and the shaft of the reducer also need to adopt a hollow structure, and both the motor and the reducer need to be able to withstand the high temperature of the heat transfer oil. Therefore, high requirements are placed on the structural design of the drive roller and the selection of the motor and reducer, which greatly increases the design and development difficulty, cost and cycle of the continuous press. Summary of the Invention

[0004] To address the problem of increased design complexity caused by high temperatures in the motor and reducer when heat transfer oil is introduced into the drive roller, this invention provides a coaxial device for roller drive and heat transfer oil introduction in a continuous hot press.

[0005] This invention provides a coaxial device for roller drive and roller heat transfer oil circulation in a continuous hot press, employing the following technical solution: A coaxial device for roller drive and roller heat transfer oil in a continuous hot press includes a drive shaft with an oil guide channel inside. The drive shaft has an inlet and an outlet communicating with the oil guide channel. It also includes a hydraulic slip ring sleeved on the drive shaft. The hydraulic slip ring includes an inner ring and an outer ring. The inner ring is fixed on the drive shaft, and the outer ring is disposed outside the inner ring. The inner ring and the outer ring are rotatable relative to each other. The inner ring has a first oil inlet communicating with the inlet and a first oil outlet communicating with the outlet. The inner wall of the outer ring has a first oil guide groove communicating with the first oil inlet and a second oil guide groove communicating with the first oil outlet. The outer ring has a second oil inlet communicating with the first oil guide groove and a second oil outlet communicating with the second oil guide groove.

[0006] In one specific implementation scheme, the inner wall of the inner ring is provided with a first connecting groove communicating with the first oil inlet and a second connecting groove communicating with the first oil outlet. The first connecting groove is connected to the inlet, and the second connecting groove is connected to the outlet.

[0007] In one specific implementation scheme, an installation groove is provided on the inner wall of the inner ring, the installation groove is disposed between the first connecting groove and the second connecting groove, and a sealing ring is provided in the installation groove.

[0008] In one specific implementation, the drive shaft is provided with a first clearance groove communicating with the inlet and a second clearance groove communicating with the outlet.

[0009] In one specific implementation, the outer wall of the inner ring is provided with a receiving groove, and the outer ring is disposed in the receiving groove.

[0010] In one specific implementation, an elastic retaining ring is provided in the receiving groove, and the elastic retaining ring is disposed between the outer ring and the inner sidewall of the receiving groove.

[0011] In one specific implementation, the outer ring has slots at both ends along its axial direction for the elastic retaining ring to engage.

[0012] In one specific implementation, the inner ring is provided with a first stop screw, and the inner ring is fixed to the drive shaft by the first stop screw.

[0013] In one specific implementation, a second stop screw is provided on the outer ring.

[0014] In summary, the present invention has the following beneficial effects: 1. By installing a hydraulic slip ring between the drive roller and the reducer, the relative rotation of the inner and outer rings of the hydraulic slip ring allows the heat transfer oil to circulate only on the drive roller and no longer flow through the reducer and motor. This enables the heat transfer oil to be introduced into the drive shaft while avoiding the high temperature of the motor and reducer caused by the heat transfer oil, thereby reducing the design and manufacturing costs of the motor and reducer, and thus reducing the design and production costs of the continuous press.

[0015] 2. The inner wall of the inner ring is provided with a first connecting groove and a second connecting groove, which can reduce the assembly accuracy when the inner ring is fixed on the drive shaft, and further reduce the design and production cost of the continuous press. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the coaxial device for roller drive and roller heat transfer oil in a continuous hot press.

[0017] Figure 2It is a cross-sectional view showing the internal structure of the inner ring.

[0018] Figure 3 This is a schematic diagram of the drive shaft.

[0019] Explanation of reference numerals in the attached drawings: 1. Drive shaft; 2. Hydraulic slip ring; 3. Outer ring; 4. Inner ring; 5. Inlet; 6. Outlet; 7. Oil guide channel; 8. First oil inlet; 9. First oil outlet; 10. First oil guide groove; 11. Second oil guide groove; 12. Second oil inlet; 13. Second oil outlet; 14. First clearance groove; 15. Second clearance groove; 16. First connecting groove; 17. Second connecting groove; 18. Mounting groove; 19. Sealing ring; 20. Receiving groove; 21. Elastic retaining ring; 22. Slot. Detailed Implementation

[0020] The following combination Figures 1-3 The present invention will be described in further detail below.

[0021] Reference Figure 1 The coaxial device for driving the rollers and circulating heat transfer oil in a continuous hot press includes a drive shaft 1 and a hydraulic slip ring 2. The drive shaft 1 can be the rotating shaft of the drive roller or a shaft coaxially connected to the rotating shaft of the drive roller. The hydraulic slip ring 2 is coaxially sleeved on the drive shaft 1. The hydraulic slip ring 2 is located between the drive roller and the reducer.

[0022] Reference Figure 1 and Figure 2 The hydraulic slip ring 2 includes an inner ring 4 and an outer ring 3. The inner ring 4 is disposed inside the outer ring 3, and the inner ring 4 and outer ring 3 can rotate relative to each other; that is, when the inner ring 4 rotates, the outer ring 3 remains stationary. The inner ring 4 is provided with a first stop screw (not shown in the figure), which passes through the inner ring 4 and is threadedly connected to the drive shaft 1, thereby fixing the inner ring 4 to the drive shaft 1, so that the rotation of the drive shaft 1 can drive the inner ring 4 to rotate. The outer ring 3 is provided with a second stop screw (not shown in the figure), which is used to connect with structures such as oil supply connectors, so that when the drive shaft 1 rotates, the outer ring 3 remains stationary, facilitating the input and output of heat transfer oil through the outer ring 3.

[0023] Reference Figure 1 and Figure 2 The inner wall of the outer ring 3 is provided with a first oil guide groove 10 and a second oil guide groove 11. Both the first oil guide groove 10 and the second oil guide groove 11 are annular grooves coaxial with the outer ring 3, and the first oil guide groove 10 and the second oil guide groove 11 are not connected. An oil guide channel 7 is provided inside the drive shaft 1. An inlet 5 and an outlet 6 communicating with the oil guide channel 7 are provided on the circumferential surface of the drive shaft 1. The inlet 5 and the outlet 6 are spaced apart along the axial direction, and there is a gap between the inlet 5 and the outlet 6 in the circumferential direction of the drive shaft 1, so that the inlet 5 and the outlet 6 face different directions.

[0024] Reference Figure 1 and Figure 2 The inner ring 4 has a first oil inlet 8 connected to the inlet 5 and a first oil outlet 9 connected to the outlet 6. The first oil inlet 8 is connected to the first oil guide groove 10, and the first oil outlet 9 is connected to the second oil guide groove 11. The outer ring 3 has a second oil inlet 12 connected to the first oil guide groove 10 and a second oil outlet 13 connected to the second oil guide groove 11. By introducing heat transfer oil from the second oil inlet 12 into the first oil guide groove 10, the heat transfer oil enters the drive shaft 1 through the first oil inlet 8 to preheat the drive roller. The heat transfer oil that is circulated out enters the second oil guide groove 11 from the first oil outlet 9, and then is discharged through the pipe connected to the second oil outlet 13. After being circulated and heated, it is transported back to the second oil inlet 12.

[0025] Reference Figure 1 and Figure 2 The inner ring 4 has a first connecting groove 16 that communicates with the first oil inlet 8 and a second connecting groove 17 that communicates with the first oil outlet 9. The first connecting groove 16 and the second connecting groove 17 are not connected to each other. Both the first connecting groove 16 and the second connecting groove 17 are annular grooves coaxial with the inner ring 4. After the inner ring 4 is fixed on the drive shaft 1, the first connecting groove 16 communicates with the inlet 5 and the second connecting groove 17 communicates with the outlet 6.

[0026] Reference Figure 2 and Figure 3 The drive shaft 1 has a first clearance groove 14 that communicates with the inlet 5 and a second clearance groove 15 that communicates with the outlet 6. The width of the first clearance groove 14 is the same as that of the first connecting groove 16, and the width of the second clearance groove 15 is the same as that of the second connecting groove 17. After the inner ring 4 is fixed on the drive shaft 1, the inner wall of the first connecting groove 16 is flush with the inner wall of the first clearance groove 14, and the inner wall of the second connecting groove 17 is flush with the inner wall of the second clearance groove 15, forming two channels for the flow of heat transfer oil.

[0027] By setting up the first connecting groove 16, the first clearance groove 14, the second connecting groove 17, and the second clearance groove 15, the machining and assembly accuracy requirements between the first oil inlet 8 and the inlet 5, as well as between the first oil outlet 9 and the outlet 6, can be reduced, thereby reducing the machining and assembly accuracy of the inner ring 4 and the drive shaft 1 and lowering costs.

[0028] Reference Figure 2The inner ring 4 is longer than the outer ring 3. A receiving groove 20 is formed on the outer wall of the inner ring 4, allowing the outer ring 3 to be placed within the receiving groove 20. There are gaps between the two ends of the outer ring 3 and the inner wall of the receiving groove 20. An elastic retaining ring 21 is provided within the receiving groove 20, and the elastic retaining ring 21 is engaged between the outer ring 3 and the inner wall of the receiving groove 20. The elastic retaining ring 21 can limit the outer ring 3, preventing axial sliding of the outer ring 3 on the inner ring 4, maintaining the stability of the outer ring 3 on the inner ring 4, so that the outer ring 3 can only rotate along the axis of the drive shaft 1 on the inner ring 4.

[0029] Reference Figure 2 Multiple mounting grooves 18 are provided on the inner wall of the inner ring 4. The mounting grooves 18 are arranged at intervals along the axis of the inner ring 4. Each mounting groove 18 is provided with a sealing ring 19. The sealing ring 19 seals the gap between the inner ring 4 and the drive shaft 1 to prevent the heat transfer oil from leaking out. There is also a mounting groove 18 between the first connecting groove 16 and the second connecting groove 17 to seal the gap between the first connecting groove 16 and the second connecting groove 17 to prevent heat transfer oils of different temperatures from coming into contact with each other.

[0030] The implementation principle of this invention is as follows: A hydraulic slip ring 2 is installed on the drive shaft 1. Heat transfer oil enters the outer ring 3 through the second oil inlet 12, then flows sequentially through the first oil guide groove 10, the first oil inlet 8, the first connecting groove 16, and the first clearance groove 14. It then enters the drive shaft 1 through the inlet 5 and circulates within the drive roller through the oil guide channel 7. The circulated heat transfer oil is discharged from the outlet 6, passing sequentially through the second clearance groove 15, the second connecting groove 17, the first oil outlet 9, and the second oil guide groove 11, finally exiting from the second oil outlet 13. The hydraulic slip ring 2 ensures that the heat transfer oil no longer flows through the reducer and motor, but circulates only within the drive roller, thus greatly alleviating the high temperature caused to the reducer and motor by the high-temperature heat transfer oil.

[0031] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A coaxial device for roller drive and roller heat transfer oil in a continuous hot press, comprising a drive shaft (1), wherein the drive shaft (1) is provided with an oil guide channel (7), and the drive shaft (1) is provided with an inlet (5) and an outlet (6) communicating with the oil guide channel (7), characterized in that: The inlet (5) and the outlet (6) are radially arranged, and a hydraulic slip ring (2) is also included. The hydraulic slip ring (2) is sleeved on the transmission shaft (1). The hydraulic slip ring (2) includes an inner ring (4) and an outer ring (3). The inner ring (4) is fixed on the transmission shaft (1), and the outer ring (3) is disposed outside the inner ring (4). The inner ring (4) and the outer ring (3) can rotate relative to each other. The inner ring (4) is provided with a first oil inlet (8) communicating with the inlet (5) and a first oil outlet (9) communicating with the outlet (6). The inner wall of the outer ring (3) is provided with a first oil guide groove (10) communicating with the first oil inlet (8) and a second oil guide groove (11) communicating with the first oil outlet (9). The outer ring (3) is provided with a second oil inlet (12) communicating with the first oil guide groove (10) and a second oil outlet (13) communicating with the second oil guide groove (11), so that the heat transfer oil no longer flows through the reducer and motor, but only circulates in the drive roller.

2. The coaxial device for roller drive and roller heat transfer oil in a continuous hot press according to claim 1, characterized in that: The inner wall of the inner ring (4) is provided with a first connecting groove (16) that communicates with the first oil inlet (8) and a second connecting groove (17) that communicates with the first oil outlet (9). The first connecting groove (16) communicates with the inlet (5) and the second connecting groove (17) communicates with the outlet (6).

3. The coaxial device for roller drive and roller heat transfer oil in a continuous hot press according to claim 2, characterized in that: An installation groove (18) is provided on the inner wall of the inner ring (4). The installation groove (18) is located between the first connecting groove (16) and the second connecting groove (17). A sealing ring (19) is provided in the installation groove (18).

4. The coaxial device for roller drive and roller heat transfer oil circulation in a continuous hot press according to claim 1, characterized in that: The drive shaft (1) is provided with a first clearance groove (14) communicating with the inlet (5) and a second clearance groove (15) communicating with the outlet (6).

5. The coaxial device for roller drive and roller heat transfer oil circulation in a continuous hot press according to claim 1, characterized in that: The outer wall of the inner ring (4) is provided with a receiving groove (20), and the outer ring (3) is disposed in the receiving groove (20).

6. The coaxial device for roller drive and roller heat transfer oil in a continuous hot press according to claim 5, characterized in that: An elastic retaining ring (21) is provided inside the receiving groove (20), and the elastic retaining ring (21) is disposed between the outer ring (3) and the inner sidewall of the receiving groove (20).

7. The coaxial device for roller drive and roller heat transfer oil in a continuous hot press according to claim 6, characterized in that: The outer ring (3) has slots (22) at both ends in the axial direction for the elastic retaining ring (21) to be inserted.

8. The coaxial device for roller drive and roller heat transfer oil in a continuous hot press according to claim 1, characterized in that: The inner ring (4) is provided with a first stop screw, and the inner ring (4) is fixed to the transmission shaft (1) by the first stop screw.

9. The coaxial device for roller drive and roller heat transfer oil circulation in a continuous hot press according to claim 1, characterized in that: The outer ring (3) is provided with a second stop screw.

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