Rolling mill gearbox cooling device

Abstract

The utility model relates to a rolling mill gearbox cooling device in the technical field of speed reducers. The rolling mill gearbox cooling device comprises a lubricating oil cooling assembly and a box body cooling assembly. The lubricating oil cooling assembly comprises a lubricating oil flowing pool and a lubricating oil cooling heat exchange plate, the heat exchange plate covers the flowing pool, heat exchange fins on the lower side of the heat exchange plate are immersed in lubricating oil, and a semiconductor chilling plate is arranged above the heat exchange plate and used for cooling the lubricating oil. The box body cooling assembly comprises a heat exchange oil pool and a heat exchange coil pipe, is connected to the outer side wall of the box body in an attached mode and is used for cooling the box body of the gearbox, and a cooling water tank is arranged on the outer side of the box body. The cooling device can cool lubricating oil of the gear box and a box body of the gear box internally and externally at the same time, the cooling efficiency and the cooling effect of the gear box can be remarkably improved, the equipment failure rate of the gear box of the rolling mill is reduced, and the service life of a gear shaft and a bearing seat of the gear box is prolonged.

Description

Technical Field

[0001] This utility model belongs to the field of speed reducer technology, specifically relating to a cooling device for a rolling mill gearbox. Background Technology

[0002] A rolling mill is a processing device that plastically deforms metal materials using rolls. Based on their operating method, rolling mills are classified as cold rolling mills and hot rolling mills. However, regardless of whether it's a cold or hot rolling mill, the gearbox is a crucial component. The rolling forces required by rolling mills are generally very large, correspondingly demanding a considerable output torque from the gearbox. During mill operation, as the transmission gears within the gearbox continuously rotate, a significant amount of heat is generated between the gears and between the gear shafts and bearing housings. Gearboxes are equipped with oil sumpes containing lubricating oil, which serves both to lubricate the gears and to cool the gearbox. As the temperature of the circulating lubricating oil gradually rises, the temperature of the oil sump and the gearbox itself also gradually becomes high. High temperatures not only affect the lubricating effect of the lubricating oil but also reduce the service life of components such as gears, gear shafts, and bearing housings. Therefore, it is essential to provide auxiliary cooling for the gearbox. However, existing rolling mill gearbox cooling devices either use water-cooled plates to exchange heat with the lubricating oil for cooling, or they add external coolers to cool the gearbox body. Moreover, the cooling effect of either the existing plate heat exchangers or the external coolers is not ideal, and the overall cooling effect of the rolling mill gearbox is also unsatisfactory. Therefore, there is an urgent need to find a more efficient rolling mill gearbox cooling device. Utility Model Content

[0003] In view of the above situation, this utility model provides a rolling mill gearbox cooling device, which can effectively achieve the purpose of cooling and reducing the temperature of the rolling mill gearbox.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A cooling device for a rolling mill gearbox includes a gearbox housing and an oil tank disposed within the housing. The oil tank stores lubricating oil, and an oil inlet and an oil outlet are respectively provided on the left and right side walls of the oil tank.

[0006] The mill gearbox cooling device also includes a lubricating oil cooling assembly for cooling the lubricating oil and a gearbox cooling assembly for cooling the gearbox body.

[0007] The lubricating oil cooling assembly includes a flow pool for temporarily storing lubricating oil and a heat exchange plate for cooling the lubricating oil. The left and right side walls of the flow pool are respectively provided with an oil inlet and an oil return port that are connected to the oil outlet and oil inlet of the oil pool. The heat exchange plate covers the flow pool directly above it. The lower surface of the heat exchange plate is integrally formed with several vertical heat exchange fins. The lower part of each heat exchange fin is immersed in the lubricating oil in the flow pool. Multiple semiconductor refrigeration chips are arranged above the heat exchange plate. A heat dissipation plate is arranged above the semiconductor refrigeration chips. The cold end and hot end of each semiconductor refrigeration chip are respectively attached to the heat exchange plate and the heat dissipation plate. The upper surface of the heat dissipation plate is integrally formed with several vertical heat dissipation fins.

[0008] The cooling assembly of the housing includes a heat exchange oil tank for storing heat transfer oil and a heat exchange coil for cooling the heat transfer oil. The heat exchange oil tank is attached to the outer wall of the housing. The heat exchange coil is immersed in the heat transfer oil in the heat exchange oil tank. Circulating cooling water flows through the heat exchange coil. A cooling water tank is provided on the outside of the housing. A cold water assembly is provided on the cooling water tank. The inlet and outlet of the heat exchange coil are respectively connected to the outlet and return outlet of the cooling water tank.

[0009] Furthermore, the flow tank is installed on the top of the housing, and a circulating oil pump and an oil filter are installed on the right side wall of the housing. The oil outlet of the oil tank is connected to the oil inlet of the flow tank in sequence through an oil supply pipe, the circulating oil pump, and the oil filter. The oil return port of the flow tank is connected to the oil inlet at the upper left of the oil tank through a return pipe. The oil tank is located at the lower part of the gearbox housing. Preferably, an oil injector is also installed at the end of the oil inlet facing the inside of the housing.

[0010] Furthermore, a cooling fan is installed above the heat dissipation fins of the heat sink, which helps to dissipate the heat conducted by the heat dissipation fins more quickly. A control box is provided on the outside of the flow pool for the electrical control of the cooling fan and each thermoelectric cooler. The cooling fan and each thermoelectric cooler are electrically connected to the control box.

[0011] Furthermore, two heat exchange oil pools are respectively provided on the front and rear side walls of the box. The side of the two heat exchange oil pools near the box is thermally connected to the side wall of the box. The top of the two heat exchange oil pools is provided with an oil replenishment port and a breather port for replenishing heat transfer oil into the heat exchange oil pools.

[0012] Furthermore, a cooling water pump is installed on the outside of the housing, and the drain outlet of the cooling water tank is connected to the inlet of the heat exchange coils in the two heat exchange oil tanks through the cooling water pump and the water supply pipe. A water filter is installed on the drain outlet of the cooling water tank; the outlet of the two heat exchange coils is connected to the return outlet of the cooling water tank through the return water pipe.

[0013] Furthermore, the cooling water assembly includes a water distribution pipe, a packing layer, and a cooling fan. The packing layer is disposed on the upper inner side of the cooling water tank, and the water distribution pipe is disposed above the packing layer. Several water spray holes are opened on the lower side wall of the water distribution pipe. Preferably, each water spray hole is also equipped with a water spray nozzle. The cooling fan is disposed above the water distribution pipe, and a ventilation opening is opened on the upper side wall of the cooling water tank. An air inlet grille is installed on the ventilation opening.

[0014] Furthermore, the upper part of the cooling water tank is provided with two return water inlets, and two sets of water distribution pipes are respectively connected to the two return water inlets in the cooling water tank. The outlets of the two heat exchange coils are respectively connected to the two return water inlets of the cooling water tank through the return water pipes.

[0015] This utility model also includes other components that enable its normal use, all of which are conventional means in the field. In addition, devices or components not limited in this utility model, such as: gearbox housing, oil sump, semiconductor cooling chip, heat sink fins, cooling fan, heat exchange coil, water spray nozzle, packing layer, etc., all adopt the prior art in the field.

[0016] The beneficial effects of this utility model are as follows:

[0017] The rolling mill gearbox cooling device provided by this utility model, by setting up a lubricating oil cooling component and a gearbox body cooling component, can simultaneously cool the lubricating oil and the gearbox body itself from both inside and outside, significantly improving the cooling efficiency and cooling effect of the gearbox. Compared with the existing technology of separate lubricating oil cooling or external coolers, it can better ensure that the rolling mill gearbox does not experience high heat during operation, reduce the failure rate of the rolling mill gearbox equipment, and extend the service life of the gearbox's gears, gear shafts, bearing housings, and other components. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the rolling mill gearbox cooling device in the embodiment.

[0019] Figure 2 for Figure 1 A schematic diagram of the internal structure of the lubricating oil cooling assembly.

[0020] Figure 3 for Figure 1 A schematic diagram of the internal structure of the intermediate cooling water assembly. Detailed Implementation

[0021] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0022] It should be noted that the terms "up," "down," "front," "back," "left," "right," "inner," and "outer," which indicate directions or positional relationships, are based on the attached drawings and are used only for ease of description.

[0023] Example

[0024] like Figure 1 As shown, a cooling device for a rolling mill gearbox includes a gearbox housing 1 and an oil sump (not shown) disposed inside the housing. The oil sump stores lubricating oil, and oil inlets and outlets 2 are respectively provided on the left and right side walls of the oil sump.

[0025] The mill gearbox cooling device also includes a lubricating oil cooling assembly for cooling the lubricating oil and a gearbox cooling assembly for cooling the gearbox body.

[0026] like Figure 2 As shown, the lubricating oil cooling assembly includes a flow pool 3 for temporarily storing lubricating oil and a heat exchange plate 4 for cooling the lubricating oil. The left and right side walls of the flow pool are respectively provided with an oil inlet 5 and an oil return port 6, which are connected to the oil outlet and oil inlet of the oil pool. The heat exchange plate covers the flow pool directly above it. The lower surface of the heat exchange plate is integrally formed with several vertical heat exchange fins 7. The lower part of each heat exchange fin is immersed in the lubricating oil in the flow pool. Several semiconductor cooling chips 8 are arranged above the heat exchange plate. A heat dissipation plate 9 is arranged above the semiconductor cooling chips. The cold end and hot end of each semiconductor cooling chip are respectively attached to the heat exchange plate and the heat dissipation plate. The upper surface of the heat dissipation plate is integrally formed with several vertical heat dissipation fins 10.

[0027] The cooling assembly of the housing includes a heat exchange oil tank 11 for storing heat transfer oil and a heat exchange coil 12 for cooling the heat transfer oil. Two heat exchange oil tanks are respectively arranged on the front and rear side walls of the housing. Both heat exchange oil tanks are flat wall-mounted housing structures, which helps to expand the heat exchange contact area. The side of each heat exchange oil tank closest to the housing is thermally connected to the side wall of the housing. Each heat exchange oil tank is provided with an oil replenishment port 13 and a vent 14 at the top for replenishing heat transfer oil in the heat exchange oil tank. The heat exchange coil is immersed in the heat transfer oil in the heat exchange oil tank. Circulating cooling water is introduced into the heat exchange coil. A cooling water tank 15 is provided on the outside of the housing. A cold water assembly is provided on the cooling water tank. The water inlet 16 and water outlet 17 of the heat exchange coil are respectively connected to the water outlet 18 and water return port 19 of the cooling water tank.

[0028] Specifically, the flow tank is installed on the top of the housing, and a circulating oil pump 20 and an oil filter 21 are installed on the right side wall of the housing. The oil outlet of the oil tank is connected to the oil inlet of the flow tank in sequence through an oil supply pipe 22, the circulating oil pump, and the oil filter. The oil return port of the flow tank is connected to the oil inlet at the upper left of the oil tank through a return pipe 23. A temperature sensor 24 is installed on the pump outlet of the circulating oil pump to detect the oil temperature of the lubricating oil.

[0029] The oil sump is located at the bottom of the gearbox housing. An oil nozzle (not shown in the figure) is installed at the end of the oil inlet facing the inside of the housing. It can spray the lubricating oil coming in from the oil inlet onto the gears inside the gearbox to provide better lubrication. The lubricating oil eventually flows back into the oil sump. At the same time, the lower part of each gear is also in contact with the lubricating oil in the oil sump. As the gears rotate, the meshing tooth surfaces of the gears can continuously be coated with lubricating oil.

[0030] Specifically, a cooling fan 25 is installed above the heat dissipation fins of the heat sink, which helps to dissipate the heat conducted by the heat dissipation fins more quickly. The cold end of the thermoelectric cooler cools the heat exchange plate and heat exchange fins, thereby cooling the lubricating oil in the flow pool. A control box 26 is installed on the outside of the flow pool for the electrical control of the cooling fan and each thermoelectric cooler cooler. The cooling fan and each thermoelectric cooler cooler cooler cooler cools the control box. The thermoelectric cooler cooler cools, heat dissipation fins, and cooling fan are all prior art and will not be described in detail here.

[0031] Specifically, a cooling water pump 27 is installed on the outside of the housing. The drain outlet of the cooling water tank is connected to the inlet of the heat exchange coils in the two heat exchange oil tanks via the cooling water pump and the water supply pipe 28. A water filter 29 is installed on the drain outlet of the cooling water tank. The outlets of the two heat exchange coils are connected to the return outlet of the cooling water tank via return pipes. A temperature sensor 30 is installed on the top of the heat exchange oil tank to detect the oil temperature of the heat transfer oil in the heat exchange oil tank.

[0032] like Figure 3 As shown, the cooling water assembly includes a water distribution pipe 31, a packing layer 32, and a cooling fan 33, similar to the internal structure of a cooling tower. The packing layer is located on the upper inner side of the cooling water tank, and the water distribution pipe is located above the packing layer. Several spray holes are formed on the lower side wall of the water distribution pipe, and each spray hole is fitted with a water spray nozzle 34. The cooling fan is located above the water distribution pipe, and a ventilation opening is formed on the upper side wall of the cooling water tank, with an air inlet grille 35 fitted onto the ventilation opening. The water distribution pipe, water spray nozzles, packing layer, and cooling fan all utilize existing technology and will not be described in detail here.

[0033] Specifically, the upper part of the cooling water tank is provided with two return water inlets, and two sets of water distribution pipes are respectively connected to the two return water inlets in the cooling water tank. The outlets of the two heat exchange coils are respectively connected to the two return water inlets of the cooling water tank through the return water pipes.

[0034] The technical solution of this utility model is not limited to the specific embodiments described above. Without departing from the scope and spirit of the described embodiments, many modifications and changes will be obvious to those skilled in the art. Any technical modifications made within the spirit and principles of this utility model shall fall within the protection scope of this utility model.

Claims

1. A cooling device for a rolling mill gearbox, comprising a gearbox housing and an oil sump disposed within the housing, wherein the oil sump stores lubricating oil, and an oil inlet and an oil outlet are respectively provided on the left and right side walls of the oil sump; characterized in that: The mill gearbox cooling device also includes a lubricating oil cooling assembly for cooling the lubricating oil, and a gearbox cooling assembly for cooling the gearbox body. The lubricating oil cooling assembly includes a flow pool for temporarily storing lubricating oil and a heat exchange plate for cooling the lubricating oil. The left and right side walls of the flow pool are respectively provided with an oil inlet and an oil return port that are connected to the oil outlet and oil inlet of the oil pool. The heat exchange plate covers the flow pool directly above it. The lower surface of the heat exchange plate is integrally formed with several vertical heat exchange fins. The lower part of each heat exchange fin is immersed in the lubricating oil in the flow pool. Multiple semiconductor refrigeration chips are arranged above the heat exchange plate. A heat dissipation plate is arranged above the semiconductor refrigeration chips. The cold end and hot end of each semiconductor refrigeration chip are respectively attached to the heat exchange plate and the heat dissipation plate. The upper surface of the heat dissipation plate is integrally formed with several vertical heat dissipation fins. The cooling assembly of the housing includes a heat exchange oil tank for storing heat transfer oil and a heat exchange coil for cooling the heat transfer oil. The heat exchange oil tank is attached to the outer wall of the housing. The heat exchange coil is immersed in the heat transfer oil in the heat exchange oil tank. Circulating cooling water flows through the heat exchange coil. A cooling water tank is provided on the outside of the housing. A cold water assembly is provided on the cooling water tank. The inlet and outlet of the heat exchange coil are respectively connected to the outlet and return outlet of the cooling water tank.

2. The rolling mill gearbox cooling device according to claim 1, characterized in that: The flow tank is installed on the top of the box, and a circulating oil pump and an oil filter are installed on the right side wall of the box. The oil outlet of the oil tank is connected to the oil inlet of the flow tank in sequence through the oil delivery pipe, the circulating oil pump and the oil filter. The oil return port of the flow tank is connected to the oil inlet at the upper left of the oil tank through the oil return pipe.

3. The rolling mill gearbox cooling device according to claim 1, characterized in that: A cooling fan is also installed above the heat dissipation fins of the heat sink, and a control box is provided on the outside of the flow pool. The cooling fan and each of the semiconductor cooling chips are electrically connected to the control box.

4. A rolling mill gearbox cooling device according to claim 1, characterized in that: Two heat exchange oil tanks are respectively arranged on the front and rear side walls of the box. The side of the two heat exchange oil tanks near the box is in contact with the side wall of the box for heat conduction. The top of the heat exchange oil tank is provided with an oil replenishment port and a vent.

5. A rolling mill gearbox cooling device according to claim 4, characterized in that: A cooling water pump is installed on the outside of the housing. The drain outlet of the cooling water tank is connected to the inlet of the heat exchange coils in the two heat exchange oil tanks through the cooling water pump and the water supply pipe. A water filter is installed on the drain outlet of the cooling water tank. The outlet of the two heat exchange coils is connected to the return outlet of the cooling water tank through the return water pipe.

6. A rolling mill gearbox cooling device according to claim 1, characterized in that: The cooling water assembly includes a water distribution pipe, a packing layer, and a cooling fan. The packing layer is located on the upper inner side of the cooling water tank. The water distribution pipe is located above the packing layer. Several water spray holes are opened on the lower side wall of the water distribution pipe. The cooling fan is located above the water distribution pipe. A ventilation opening is opened on the upper side wall of the cooling water tank, and an air inlet grille is installed on the ventilation opening.

7. A rolling mill gearbox cooling device according to claim 6, characterized in that: The upper part of the cooling water tank is provided with two return water inlets, and two sets of water distribution pipes are respectively connected to the two return water inlets in the cooling water tank. The outlets of the two heat exchange coils are respectively connected to the two return water inlets of the cooling water tank through the return water pipes.

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