Device for reducing temperature of riding wheel tile of rotary kiln
By setting up an inlet and outlet section in the closed inner cavity of the rotary kiln bearing shell and connecting it with the external cooling system, combined with the design of the cooler and the cooler, the problem of difficult to reduce the temperature of the bearing shell is solved, achieving a uniform and accurate cooling effect, and improving the operating efficiency of the equipment.
Patent Information
- Application Number
- CN202421660050.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-15
AI Technical Summary
The temperature of the rotary kiln tile is difficult to effectively reduce, resulting in an increase in the lubricant temperature and poor cooling effect.
A device is designed to form a cooling system with the external cooling source by opening an inlet section and an outlet section in the closed inner cavity of the bracket bearing shell, and to achieve cooling of the bracket bearing shell using low-temperature pipes and high-temperature pipes. The device also includes a cooler and a cooler, which are arranged in the oil tank and the environmental cavity respectively, further improving the cooling effect.
It achieves uniform cooling of the support wheel bearing bushing, improves the accuracy of temperature control, ensures effective cooling of lubricant and environmental cavity, and improves the operating efficiency and reliability of the equipment.
Smart Images
Figure CN222824789U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of rotary kilns, in particular to a device for reducing the temperature of supporting wheel shoes of a rotary kiln. Background Art
[0002] The cement rotary kiln is the main equipment for cement production. Since the rotary kiln usually runs at high temperature and low speed, the temperature of the roller bearing and lubricating oil will rise under high temperature. For example, the Chinese patent document "A forced cooling device to solve the problem of excessive temperature of the roller bearing of the rotary kiln, announcement number CN 209371761 U" discloses that the input end of the oil pump is connected to the oil tank at the bottom of the roller bearing through a pipeline, and a pressure regulating valve 1 for regulating oil pressure is provided on the pipeline. The output end of the oil pump is connected to the oil inlet of the cooler through a metal hose, and the oil outlet of the cooler is connected to the inlet of the supercharger through a metal hose. The outlet of the supercharger is connected to a spray pipe, and a pressure regulating valve 2 for regulating oil pressure is provided between the supercharger and the spray pipe; a high-pressure oil curtain is formed by the supercharger and sprayed on the surface of the roller bearing through the spray pipe to force the cooling of the roller shaft and bearing. At present, in order to solve the problem of cooling the lubricating oil of the supporting roller bearing, a rotary kiln generally sets an external cooler to cool the lubricating oil, and arranges a special supercharger and other return oil immersion cooling. After the cooling lubricating oil flows slowly from top to bottom, the temperature gradually increases, resulting in poor cooling effect at the bottom. This application will carry out cooling design based on the closed inner cavity inside the supporting roller bearing. Utility Model Content
[0003] The purpose of the utility model is to provide a device for reducing the temperature of the supporting wheel bearing of a rotary kiln in view of the above-mentioned problem, so as to achieve the cooling of the supporting wheel bearing based on the inner cavity thereof.
[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is:
[0005] A device for reducing the temperature of a rotary kiln supporting wheel bearing comprises a supporting wheel bearing configured with a closed inner cavity, an external cooling source, a low-temperature pipe and a high-temperature pipe, wherein the outlet section of the external cooling source is connected to the low-temperature pipe, the closed inner cavity is provided with an inlet section and an outlet section, the inlet section of the closed inner cavity is connected to the external low-temperature pipe, and the outlet section of the closed inner cavity is connected to the external high-temperature pipe for discharge or reflux.
[0006] The enclosed inner cavity includes an enclosed inner cavity I and an enclosed inner cavity II. The ends of the enclosed inner cavity I and the enclosed inner cavity II on the same side are connected, and the other ends thereof are respectively provided with an inlet section and an outlet section. Thus, a U-shaped structure is formed, which enters from one end and exits from the other end, thereby reducing external connection points. The external cooling source is an external water supply component that can provide cooling water.
[0007] As mentioned above, an inlet section and an outlet section are opened in the closed inner cavity of the support roller bearing to form a cooling system with an external cooling source to achieve cooling of the support roller bearing. The closed inner cavity is spread circumferentially, so the cooling uniformity is better.
[0008] Based on the above scheme, in an improved scheme, in order to separately control each support roller bearing branch, the device also includes a bearing cavity switch valve, and the inlet section and the outlet section of the closed inner cavity are both arranged with a bearing cavity switch valve to realize separate control of each closed inner cavity cooling branch according to actual conditions.
[0009] Based on the above scheme, in an improved scheme, in order to cool the lubricating oil, the device also includes a cooler, which is arranged in the oil pool below the supporting wheel bearing, and the outlet section of the cooler is connected to the external high-temperature pipe, and the inlet section of the cooler is connected to the external low-temperature pipe to cool the lubricating oil. Preferably, the device also includes a cooling switch valve, and the inlet section and outlet section of the cooler are both arranged with cooling switch valves to realize the control of each lubricating oil cooling branch according to actual conditions.
[0010] Based on the above scheme, in an improved scheme, in order to cool down the inner cavity of each supporting roller bearing environment, the device further includes a cooler, which is arranged in the inner cavity of the environment above the supporting roller bearing, and the inlet section of the cooler is connected to the low temperature pipe, and the outlet section of the cooler is connected to the high temperature pipe, so as to cool down the inner cavity of the environment. Preferably, the device further includes a cooling switch valve, and the inlet section and the outlet section of the cooler are both arranged with the cooling switch valve, so as to realize the control of the cooling branches of each inner cavity of the environment according to the actual situation.
[0011] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:
[0012] The utility model discloses a device for reducing the temperature of a rotary kiln roller bearing. An inlet section and an outlet section are provided in the closed inner cavity of the roller bearing to form a cooling system with an external cooling source to cool the roller bearing. The closed inner cavity is arranged along a circumferential extension, so the upper and lower parts thereof have good uniformity in cooling and high accuracy in temperature control. A cooler is arranged in the oil pool below the roller bearing to cool the lubricating oil. A cooler is arranged in the environmental inner cavity above the roller bearing to cool the environmental inner cavity. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of Example 1 of the present utility model.
[0014] Figure 2 yes Figure 1 Schematic diagram of the top view structure of the heat exchange tube group cooler.
[0015] Figure 3 yes Figure 1 Cooling principle diagram.
[0016] Figure 4 yes Figure 1 A side view schematic diagram of the partial internal structure.
[0017] Figure 5 It is a partial structural schematic diagram of Example 2 of the utility model.
[0018] In the accompanying drawings, 10, support roller, 20, support roller shaft, 30, support roller bearing, 33, closed inner cavity, 40, oil pool, 50, oil return assembly, 1, cooler, 2, cooler, 3, low-temperature pipe, 4, high-temperature pipe, 5, cooling pump. DETAILED DESCRIPTION
[0019] Example 1
[0020] See also Figure 1-Figure 4 , a device for reducing the temperature of a rotary kiln supporting wheel bearing of the present embodiment 1 includes a supporting wheel bearing 30 configured with a closed inner cavity 33, and also includes an external cooling source and a low-temperature pipe (a pipe on the side before cooling) 3, and a high-temperature pipe (a pipe on the side after cooling) 4. The outlet section of the external cooling source is connected to the low-temperature pipe 3, and the closed inner cavity 33 is provided with an inlet section 31 and an outlet section 32. The inlet section 31 of the closed inner cavity 33 is connected to the external low-temperature pipe 3, and the outlet section 32 of the closed inner cavity 33 is connected to the external high-temperature pipe 4 for discharge or reflux.
[0021] Among them, the supporting roller bearing of the rotary kiln generally includes a supporting roller 10, a supporting roller shaft 20, a supporting roller bearing 30 and an end cover, etc. The supporting roller bearing 30 and the bearing seat are arranged below the supporting roller shaft 20, and the bearing cover is arranged above the supporting roller shaft 20. There is an oil pool 40 at the bottom of the bearing seat, and the oil pool stores lubricating oil. An oil outlet section 41 is provided at the bottom of the oil pool, and the oil is returned to the supporting roller shaft through an oil return component 50; wherein the oil return component includes an oil return pump, etc.; these are all existing technologies and will not be repeated here. As shown in the figure, this embodiment 1 is explained by arranging two oil pools that are not connected to each other as an example, and an inlet section and an outlet section connected to the outside are opened in two closed inner cavities inside the supporting roller bearing, and then the external cooling source is connected through pipes (low temperature pipes and high temperature pipes) to form a cooling system.
[0022] The enclosed inner cavity 33 generally includes an enclosed inner cavity I and an enclosed inner cavity II arranged axially at intervals, and its cross section is circular, rectangular, or has two parallel sides in the shape of a runway. This is an existing technology, and the present application improves it, connecting the ends of the enclosed inner cavity I and the enclosed inner cavity II on the same side (designing a connecting hole), and the other ends of the enclosed inner cavity I and the enclosed inner cavity II on the same side are respectively provided with through holes and arranged with receiving pipes (to connect the external low-temperature pipe or high-temperature pipe through a joint) to form an inlet section and an outlet section. In this way, a U-shaped channel structure is formed, entering from one end of the channel and exiting from the other end, and an inlet section and an outlet section are set relative to each enclosed inner cavity, reducing external connection points.
[0023] The external cooling source can be an air source or a water source. Considering the required cooling temperature, continuity, etc., this embodiment takes a water source as an example, that is, the external cooling source is an external water supply component that can provide cooling water, such as connecting to a municipal water pipe (the water pipe entering the factory can be buried underground to keep the water at a lower temperature). Another example is using a water pump to extract deep well water through a pumping pipe, and the drainage can be left in a circulation pool for use after cooling. The water extraction cost is low and can be recycled. Figure 3 As shown, a cooling pump 5 can be provided on the high-temperature pipe 4, which plays an extraction role when the power of the cooling pump 5 is high enough (in this case, an extraction water supply pump is not required at the low-temperature end), and plays a pressurization role when the power is reduced (in this case, an extraction water supply pump is also provided at the low-temperature end).
[0024] As mentioned above, an inlet section and an outlet section are opened in the closed inner cavity of the roller bearing to form a cooling system with an external cooling source, so that the roller bearing can be cooled. The closed inner cavity is extended along the circumferential direction, so the upper and lower parts (vertical bottom and top) have better cooling uniformity and higher temperature control accuracy.
[0025] Example 2
[0026] Different from the aforementioned embodiment 1, this embodiment 2 limits the structure of the cavity switch valve, which is as follows. For other unexplained details, please refer to the aforementioned embodiment 1.
[0027] See also Figure 1-Figure 4 In order to separately control each support roller bearing branch, the device of this embodiment 2 also includes a bearing cavity switch valve. The bearing cavity switch valves are arranged at the inlet section 31 and the outlet section 32 of the closed inner cavity 33 to realize separate control of each closed inner cavity cooling branch according to actual conditions.
[0028] For example, if the circulating pool is used for water supply, the temperature of the circulating pool is 25℃ in the morning and rises to 35℃ at noon. The temperature of the circulating pool is 28℃ at noon. If you want to cool down to a suitable temperature, the opening of the cavity switch valve may need to be adjusted from 0.5 in the morning to 0.6, 0.75, 0.8, etc. At the same time, the position of each support wheel in the upstream and downstream of the production line, affected by wind and sunlight, etc., will cause temperature differences, so it is necessary to make differential adjustments based on actual conditions.
[0029] Among them, all the switch valves described below in this application are described using a ball valve 6 with adjustable flow.
[0030] Example 3
[0031] Based on the aforementioned embodiment 1 or 2, the present embodiment 3 defines a lubricating oil cooling structure, which is specifically as follows. For other unexplained details, please refer to the aforementioned embodiments 1-2.
[0032] See also Figure 1-Figure 4In order to cool down the lubricating oil, the device of this embodiment 3 also includes a cooler. Similarly, water source cooling is selected, and the cooler is a cooling heat exchange tube group 2. The heat exchange tube group is an existing technology. For a brief description, please refer to the following heat exchange tube group cooler. The cooler (cooling heat exchange tube group) 2 is arranged in the oil pool 40 below the support wheel bearing. The outlet section 22 of the cooler 2 is connected to the external high-temperature pipe 4, and the inlet section 21 of the cooler 2 is connected to the external low-temperature pipe 3 to cool down the lubricating oil. Moreover, after cooling, the lubricating oil is returned through the oil outlet section 41 of the oil pool 40 and the pipeline of the oil return assembly 50 under the action of the oil return assembly 50 to cool down the support wheel bearing. A combination of multiple cooling means is adopted. If one cooling subsystem fails, there is another cooling subsystem to cool down, and the cooling efficiency can be adjusted, which can continue to support the operation of the equipment for a period of time.
[0033] Based on the above examples, in a preferred example, the device further includes a cooling switch valve, and cooling switch valves are arranged at the inlet section and the outlet section of the cooler. Similarly, it is also possible to control each lubricating oil cooling branch separately according to actual conditions.
[0034] Example 4
[0035] Based on any of the aforementioned embodiments 1-3, this embodiment 4 has an environment inner cavity cooling structure, which is specifically as follows. For other unexplained details, please refer to the aforementioned embodiments 1-3.
[0036] See also Figure 1-Figure 4 In order to cool down the inner cavity of each supporting wheel bearing environment, the device of this embodiment 4 also includes a cooler, which can be an air conditioner. Similarly, water source cooling is selected, and the cooler is a cooling heat exchange tube group 1, such as Figure 2 As shown, the heat exchange tube group is formed by arranging the pipes one by one, which is an existing technology. The cooler (cooling heat exchange tube group) 1 is arranged in the environmental cavity above the supporting wheel bearing. The inlet section 11 of the cooler 1 is connected to the low temperature pipe 3, and the outlet section 12 of the cooler 1 is connected to the high temperature pipe 4 to achieve cooling of the environmental cavity. Multiple cooling means are combined. If one cooling subsystem fails, another cooling subsystem can be used for cooling, and the cooling efficiency can be adjusted, which can continue to support the operation of the equipment for a period of time.
[0037] Based on the above examples, in the preferred example, compared with the planar shape, the cylindrical circumferential bending has a larger contact surface of the heat exchange tube and a better cooling effect.
[0038] Based on the above examples, in a preferred example, the device further comprises a cooling switch valve, and cooling switch valves are arranged at the inlet section 11 and the outlet section 12 of the cooler 1. Similarly, the cooling branches of each environment cavity can be controlled separately according to actual conditions.
[0039] Example 5
[0040] Different from any of the aforementioned embodiments 1-4, the present embodiment 5 arranges two oil pools to be connected, as follows. For other unexplained details, please refer to the aforementioned embodiments 1-4.
[0041] See also Figure 5 In the device of the present embodiment 5, two oil pools are arranged to be connected, for example, a connecting cavity is opened in the middle thereof, so that the two oil pools are connected, and the two cooling heat exchange tube groups originally configured separately are connected in series. Originally, two pairs of inlet sections and outlets need to be opened, but now only one pair is needed. For example, Figure 1 The inlet and outlet sections in the middle are removed and only the outer inlet and outlet sections are retained, thereby reducing pipeline connection points and reducing the risk of oil leakage.
[0042] It should be pointed out that the examples of the above-mentioned embodiments can be preferably combined with one or more of them according to actual needs, and multiple examples use a set of drawings to illustrate the combined technical features, which will not be described one by one here.
[0043] It should be noted that the orientation or position relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation.
[0044] The above description is a detailed description and illustration of the preferred feasible embodiments of the utility model, but these descriptions are not intended to limit the scope of protection required by the utility model. All equivalent changes or modified changes completed under the technical teachings suggested by the utility model should fall within the scope of patent protection covered by the utility model.
Claims
1. A device for reducing the temperature of a rotary kiln supporting wheel bearing, comprising a supporting wheel bearing having a sealed inner cavity, characterized in that: It also includes an external cooling source and a low-temperature pipe and a high-temperature pipe. The outlet section of the external cooling source is connected to the low-temperature pipe. The closed inner cavity is provided with an inlet section and an outlet section. The inlet section of the closed inner cavity is connected to the external low-temperature pipe, and the outlet section of the closed inner cavity is connected to the external high-temperature pipe for discharge or reflux.
2. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 1, characterized in that: The enclosed inner cavity comprises an enclosed inner cavity I and an enclosed inner cavity II. The enclosed inner cavity I and the enclosed inner cavity II are connected at one end on the same side, and the other ends thereof are respectively provided with an inlet section and an outlet section.
3. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 1, characterized in that: It also includes a cavity switch valve, which is arranged at the inlet section and the outlet section of the closed inner cavity.
4. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 1, characterized in that: It also includes a cooler, which is arranged in the oil pool below the supporting wheel bearing, the outlet section of the cooler is connected to the external high-temperature pipe, and the inlet section of the cooler is connected to the external low-temperature pipe.
5. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 4, characterized in that: It also includes a cooling switch valve, which is arranged at the inlet section and the outlet section of the cooler.
6. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 1, characterized in that: It also includes a cooler, which is arranged in the environmental cavity above the supporting wheel bearing. The inlet section of the cooler is connected to the low-temperature pipe, and the outlet section of the cooler is connected to the high-temperature pipe.
7. The device for reducing the temperature of the rotary kiln support wheel shoe according to claim 6, characterized in that: It also includes a cooling switch valve, and the cooling switch valves are arranged at the inlet section and the outlet section of the cooler.
8. A device for reducing the temperature of a rotary kiln support wheel shoe according to any one of claims 1 to 7, characterized in that: The external cooling source is an external water supply component capable of providing cooling water.