Self-circulation heat dissipation system for rotary power box of coal mine drilling machine

Abstract

The utility model relates to a self-circulation heat dissipation system for a rotary power box of a coal mine drilling machine, which comprises a circulating pipeline, a cooling circulating pump, a fan driving motor and a heat dissipation plate. The cooling circulating pump and the fan driving motor are sequentially arranged on the circulating pipeline, and the heat dissipation plate is arranged on the blowing side of the fan. A lubricating oil inlet and a lubricating oil outlet of the power box are connected with the two ends of the circulating pipeline respectively, and a rotating shaft of the power box is coaxially connected with an input shaft of the cooling circulating pump. When the cooling device is used, the rotating shaft of the power box rotates to drive the cooling circulating pump to work, the cooling circulating pump drives lubricating oil to flow out of the oil suction port of the power box and drives the fan driving motor to rotate, the fan driving motor rotates to drive the fan to rotate, and the lubricating oil passing through the fan driving motor enters the heat dissipation plate. Due to the fact that the heat dissipation plate is located on the air blowing side of the fan, air formed by the fan drives the heat dissipation plate to cool the lubricating oil, the cooled lubricating oil returns to the power box after passing through the chuck to take away heat of the chuck, circulation of the lubricating oil is achieved, and heat dissipation of the power box is achieved.

Description

Technical Field

[0001] This utility model relates to the field of drilling rigs, and in particular to the field of heat dissipation technology for drilling rig power boxes, specifically referring to a self-circulating heat dissipation system for the rotary power box of a coal mine drilling rig. Background Technology

[0002] The rotary drilling operation of coal mine drilling rigs mainly relies on a hydraulic motor to drive the input shaft of the rotary power box to rotate, and then through the transmission mechanism in the rotary power box to drive the output shaft to rotate, which in turn drives the drill rod and drill bit to rotate.

[0003] During drilling operations, wear and tear on the slewing power box transmission mechanism causes the power box body, chuck, and internal lubricating oil to overheat. Natural cooling of the slewing power box is typically inefficient, leading to excessively high overall temperatures, premature component failure, and a higher failure rate.

[0004] An external power box circulating cooling system solves the problem of heat generation in the rotary power box. Considering the high explosion-proof requirements for electrical components in underground coal mines, the difficulty in cable routing, and the high cost and installation difficulty of conventional circulating drive motors and cooling fan motors. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing a self-circulating cooling system for the rotary power box of a coal mine drilling rig. It utilizes the power box shaft as the power source to drive the lubricating oil, thereby achieving self-circulating cooling of the lubricating oil.

[0006] This utility model is achieved through the following technical solution: a self-circulating cooling system for a rotary power box of a coal mine drilling rig, comprising a circulation pipe through which lubricating oil flows, a cooling circulation pump arranged sequentially on the circulation pipe along the flow direction of the lubricating oil, a fan drive motor coaxially arranged with the fan, and a heat dissipation plate located on the fan blowing side. The lubricating oil inlet and lubricating oil outlet of the power box are respectively connected to the two ends of the circulation pipe, and the rotating shaft of the power box is coaxially connected to the input shaft of the cooling circulation pump.

[0007] In use, the power box's shaft rotates, driving the cooling circulation pump to work. The cooling circulation pump causes lubricating oil to flow out from the power box's oil inlet and drives the fan drive motor to rotate. The fan drive motor rotates, causing the fan to rotate. The lubricating oil passing through the fan drive motor enters the heat sink. Since the heat sink is located on the fan's blowing side, the airflow generated by the fan drives the heat sink to cool down, thereby cooling the lubricating oil. The cooled lubricating oil then returns to the power box, thus achieving lubricating oil circulation and cooling of the power box.

[0008] Preferably, the heat sink has a cavity inside, with the heat dissipation surface facing the fan. This preferred solution increases the contact area of ​​the lubricating oil on the fan-blowing side by setting up the heat sink, thereby improving the heat dissipation effect.

[0009] Preferably, the circulation pipe is also provided with a chuck located between the power box and the heat sink.

[0010] This preferred solution allows for convenient cooling of the chuck by incorporating its design.

[0011] Preferably, the circulation pipeline is also equipped with a back pressure check valve connected in parallel with the cooling circulation pump. In this preferred embodiment, when the pressure of the circulation system is too high, the lubricating oil of the cooling circulation pump can be discharged back into the power box through the back pressure check valve, preventing damage to the cooling circulation system due to overpressure.

[0012] Preferably, the circulation pipeline is also equipped with a filter located between the cooling circulation pump and the fan drive motor. This preferred embodiment filters out impurities in the lubricating oil through the filter.

[0013] Preferably, the cooling circulation pump is a reversible cycloidal gear pump. In this preferred embodiment, regardless of the forward or reverse rotation of the shaft inside the power unit, the cooling circulation pump always draws oil from the suction port and exits in one direction, preventing the lubricating oil from flowing in the opposite direction.

[0014] Preferably, the power box is provided with a first shaft, a second shaft, and a third shaft, and the input shaft of the cooling circulation pump is coaxially connected to any one of them.

[0015] The beneficial effects of this utility model are as follows: The rotation of the power box shaft drives the cooling circulation pump to work. The cooling circulation pump drives the lubricating oil to flow out from the oil inlet of the power box and drives the fan drive motor to rotate. The rotation of the fan drive motor drives the fan to rotate. The lubricating oil passing through the fan drive motor enters the heat sink. Since the heat sink is located on the fan's blowing side, the air generated by the fan drives the heat sink to cool down, thereby cooling the lubricating oil. After the lubricating oil is cooled, it returns to the power box after the heat from the chuck is carried away by the chuck, thus realizing the circulation of the lubricating oil and achieving heat dissipation of the power box. When the pressure of the circulation system is too high, the lubricating oil of the cooling circulation pump can be discharged back into the power box through the back pressure check valve to prevent the cooling circulation system from being damaged by overpressure. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] As shown in the figure:

[0018] 1. Power head drive motor, 2. Power box, 3. Cooling circulation pump, 4. Pressurized check valve, 5. Filter, 6. Fan drive motor, 7. Fan, 8. Heat sink, 9. Chuck, 11. First axis, 12. Second axis, 13. Third axis. Detailed Implementation

[0019] To clearly illustrate the technical features of this solution, the following detailed implementation method will be used to explain the solution.

[0020] See attached document Figure 1 This utility model discloses a self-circulating heat dissipation system for a rotary power box 2 of a coal mine drilling rig, including a circulation pipe through which lubricating oil flows. The two ports of the circulation pipe are respectively connected to the oil suction port and the oil return port of the power box 2. The lubricating oil enters the circulation pipe from the oil suction port and flows into the power box 2 from the oil return port. Valves are provided on both the oil suction port and the oil return port.

[0021] The circulation pipeline is equipped with a motorless cooling circulation pump 3, a filter 5, a fan drive motor 6 coaxial with the fan 7, a heat sink 8 located on the blowing side of the fan 7, and a chuck 9, arranged sequentially along the flow direction of the lubricating oil.

[0022] The power box 2 is equipped with a first shaft 111, a second shaft 12, and a third shaft 13. The input shaft of the cooling circulation pump 3 is coaxially connected to any one of them. In this scheme, the input shaft of the cooling circulation pump 3 is connected to the second shaft 12, and the first shaft 111 is connected to the power head drive motor 1. The existing cooling circulation pump 3 uses a motor as its power source, but the cooling circulation pump 3 in this scheme does not have a motor. The cooling circulation pump 3 adopts a reversible cycloidal gear pump. Regardless of whether the second shaft 12 rotates forward or backward, the cooling circulation pump 3 is always driven to enter oil from the oil suction port and exit oil in one direction to prevent the lubricating oil from flowing backward.

[0023] The heat sink 8 has a cavity inside, and the heat dissipation surface faces the fan 7. The circulation pipe is also equipped with a back pressure check valve 4 connected in parallel with the cooling circulation pump 3. When the pressure of the circulation system is too high, the lubricating oil of the cooling circulation pump 3 can be discharged back to the oil suction port through the back pressure check valve 4 to prevent the cooling circulation system from being damaged by overpressure.

[0024] The fan 7 and the fan drive motor 6 are coaxially mounted and both are axially connected inside the cooling box. The cooling box includes a partition plate, with one side of the partition plate being a power chamber and the other side being a cooling chamber. The power chamber has an inlet and an outlet that communicate with the circulation pipe. The fan drive motor 6 is located inside the power chamber. Both the fan drive motor 6 and the fan 7 are existing technologies. The heat sink 8 is located inside the cooling chamber.

[0025] In use, the two shafts 12 inside the power box 2 rotate, thereby driving the cooling circulation pump 3 to work. The cooling circulation pump 3 drives the lubricating oil to flow out from the oil suction port of the power box 2, and drives the fan drive motor 6 to rotate. The rotation of the fan drive motor 6 drives the fan 7 to rotate. The lubricating oil passing through the fan drive motor 6 enters the heat sink 8. Since the heat sink 8 is located on the blowing side of the fan 7, the air generated by the fan 7 drives the heat sink 8 to cool down, thereby cooling the lubricating oil. After being cooled, the lubricating oil returns to the power box 2 after the heat from the chuck is carried away by the chuck, thus realizing the circulation of the lubricating oil, that is, realizing the heat dissipation of the power box 2. When the pressure of the circulation system is too high, the lubricating oil of the cooling circulation pump 3 can be discharged back into the power box 2 through the back pressure check valve 4 to prevent the cooling circulation system from being damaged by overpressure.

[0026] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A self-circulating heat dissipation system for a rotary power box of a coal mine drilling rig, characterized in that: The cooling circulation pump (3), the fan driving motor (6) coaxially arranged with the fan (7), and the heat dissipation plate (8) on the blowing side of the fan (7) are sequentially arranged on the circulation pipeline in which lubricating oil flows.

2. The coal mine drilling rig rotary power box self-circulation heat dissipation system according to claim 1, characterized in that: A cavity is formed in the heat dissipation plate (8), and a heat dissipation surface of the heat dissipation plate (8) faces the fan (7).

3. The self-circulating heat dissipation system of the rotary power box of the coal mine drilling machine according to claim 1, characterized in that: A chuck (9) is further arranged on the circulation pipeline between the power box (2) and the heat dissipation plate (8).

4. The self-circulating heat dissipation system of the rotary power box of the coal mine drilling machine according to claim 1, characterized in that: A back pressure one-way valve (4) is further arranged on the circulation pipeline in parallel with the cooling circulation pump (3).

5. The self-circulating heat dissipation system of the rotary power box of the coal mine drilling machine according to claim 1, characterized in that: A filter (5) is further arranged on the circulation pipeline between the cooling circulation pump (3) and the fan driving motor (6).

6. The coal mine drill rotary power box self-circulation heat dissipation system according to claim 1, characterized in that: The cooling circulation pump (3) is a reversible trochoid gear pump.

7. The coal mine drill rotary power box self-circulation heat dissipation system according to claim 1, characterized in that: The power box (2) is provided with an axis (111), a second axis (12), and a third axis (13), and the input shaft of the cooling circulation pump (3) is coaxially connected with any one of the axes.

Images