Cutterhead gear oil lubrication cooling system

Abstract

The application provides a cutter gear oil lubrication cooling system and relates to the technical field of tunneling equipment. The cutter gear oil lubrication cooling system comprises an oil pumping mechanism, a filtering mechanism and a conveying mechanism. The oil pumping mechanism is used for pumping gear oil in the main drive of a tunneling machine. The filtering mechanism is used for filtering impurities in the gear oil pumped by the oil pumping mechanism. The conveying mechanism is used for conveying the filtered gear oil of the filtering mechanism to each lubrication point of a speed reducer. The cutter gear oil lubrication cooling system of the application actively lubricates the gear in the speed reducer, thereby preventing the speed reducer from being damaged due to dry grinding of the gear.

Description

Technical Field

[0001] This application relates to the field of tunneling equipment technology, and in particular to a cutterhead gear oil lubrication and cooling system. Background Technology

[0002] The working principle of a rotary cutterhead rock tunneling machine is to cut the rock layer by layer by rotating the rotary cutterhead, and then use a propulsion mechanism to push the rock and soil to the rear of the tunneling machine, and finally transport it out of the tunnel.

[0003] The related technology of the rotary cutter rock tunneling machine includes a boom, a cutterhead, and a drive system. The drive system drives the cutterhead to rotate on the boom through a reducer. The reducer can match the speed and reduce the torque. The boom can pitch up and down to adjust the height of the cutterhead. The reducer housing contains lubricating oil, which lubricates the gears inside the reducer when they rotate. However, the cutterhead of the rotary cutter rock tunneling machine is horizontally installed. When the boom is in the lowest or highest position, there is insufficient lubrication of the gears inside the reducer. If the cutterhead continues to rotate at this time, it will cause dry grinding of the gears inside the reducer, resulting in damage to the reducer. Utility Model Content

[0004] This application provides a cutter head gear oil lubrication and cooling system to solve the technical problem of insufficient gear lubrication inside the reducer leading to gear dry friction damage in related technologies.

[0005] This application provides a cutterhead gear oil lubrication and cooling system, including an oil extraction mechanism, a filtering mechanism, and a conveying mechanism. The oil extraction mechanism is used to extract gear oil from the main drive of the tunneling machine, the filtering mechanism is used to filter impurities in the gear oil extracted by the oil extraction mechanism, and the conveying mechanism is used to convey the gear oil filtered by the filtering mechanism to various lubrication points of the reducer.

[0006] In some embodiments, the oil extraction mechanism includes a hydraulic pump and a drive assembly, the drive assembly being used to drive the hydraulic pump to extract gear oil from the reducer.

[0007] In some embodiments, the drive assembly includes a hydraulic motor and a proportional multi-way valve, the proportional multi-way valve being electrically connected to the cutterhead of the tunneling machine and the hydraulic motor, the proportional multi-way valve being configured to energize and control the hydraulic motor to rotate when the cutterhead rotates, thereby driving the hydraulic pump to start pumping oil.

[0008] In some embodiments, the filtration mechanism includes a filter disposed at the output end of the oil extraction mechanism, the filter being configured to remove impurities from the gear oil as it passes through the filter.

[0009] In some embodiments, the conveying mechanism includes a cooling component and a distributing component. The cooling component is used to cool the gear oil filtered by the filtering mechanism, and the distributing component is used to uniformly deliver the gear oil cooled by the cooling component to each lubrication point of the reducer.

[0010] In some embodiments, the cooling assembly includes a water cooler configured to cool gear oil as it passes through the water cooler.

[0011] In some embodiments, the distribution component includes a synchronous motor for uniformly distributing the gear oil cooled by the cooling component to the various lubrication points of the reducer.

[0012] In some embodiments, a detection alarm mechanism is further included, which is configured to detect the level of gear oil in the reducer and issue an alarm when the level of gear oil is lower than a minimum preset level or higher than a maximum preset level.

[0013] In some embodiments, the detection alarm mechanism includes a first pressure sensor and a second pressure sensor, wherein the first pressure sensor is used to detect the lowest level of gear oil in the reducer, and the second pressure sensor is used to detect the highest level of gear oil in the reducer.

[0014] In some embodiments, a monitoring element is further included, which is configured to monitor the flow rate of gear oil entering the conveying mechanism and stop the rotation of the cutter head when the flow rate is lower than a preset flow rate.

[0015] This application provides a cutterhead gear oil lubrication and cooling system. An oil extraction mechanism actively extracts gear oil from the reducer, ensuring the oil is actively delivered to all lubrication points to lubricate the gears. This prevents insufficient lubrication caused by changes in the gear oil level due to boom pitch, allowing the tunneling machine to lubricate the gears while tunneling, reducing gear wear, extending the machine's service life, and achieving adequate lubrication of the reducer gears. Furthermore, it allows the tunneling machine to adapt to a horizontal cutterhead arrangement. The inclusion of a filter mechanism removes impurities from the gear oil, preventing them from being transported into the reducer and causing gear wear, thus improving the gear lubrication effect. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0017] Figure 1 This is a simplified structural diagram of the cutter head gear oil lubrication and cooling system provided in an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100. Oil extraction mechanism; 110. Hydraulic pump; 120. Drive assembly; 121. Hydraulic motor; 122. Proportional multi-way valve;

[0020] 200. Filtration mechanism;

[0021] 300. Conveying mechanism; 310. Cooling assembly; 320. Distributing assembly;

[0022] 400. Detection and alarm mechanism; 410. First pressure sensor; 420. Second pressure sensor;

[0023] 500, monitoring items;

[0024] 600, Main drive.

[0025] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0026] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0027] As described in the background section, the rotary cutter rock tunneling machine of the related technology includes a boom, a cutterhead, and a drive system. The drive system drives the cutterhead to rotate on the boom via a reducer. The reducer can match the rotational speed and reduce the torque. The boom can pitch up and down to adjust the height of the cutterhead. The reducer housing contains lubricating oil, which lubricates the gears inside the reducer when they rotate. However, the cutterhead of the rotary cutter rock tunneling machine is horizontally mounted. When the boom is in its lowest or highest position, there is insufficient lubrication of the gears inside the reducer. If the cutterhead continues to rotate at this time, it will cause dry grinding of the gears inside the reducer, resulting in damage to the reducer.

[0028] To address the aforementioned technical problems, this application provides a cutterhead gear oil lubrication and cooling system. When the cutterhead of the tunneling machine rotates, the proportional multi-way valve is energized and controls the hydraulic motor to rotate, causing the hydraulic pump to start. This allows the hydraulic pump to draw gear oil from the reducer. At this time, the gear oil passes through a filter to remove impurities. The filtered gear oil then enters a water cooler for cooling. The cooled gear oil is then evenly distributed to various lubrication points of the reducer by a distribution motor to achieve lubrication. This prevents insufficient gear lubrication caused by changes in the gear oil level following the boom's up-and-down movement. The tunneling machine achieves both gear lubrication and cooling while tunneling, reducing gear wear and preventing malfunctions due to overheating. This indirectly improves the reducer's performance and extends the tunneling machine's service life.

[0029] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0030] like Figure 1 As shown, a cutterhead gear oil lubrication and cooling system includes an oil extraction mechanism 100, a filtering mechanism 200, and a conveying mechanism 300. The oil extraction mechanism 100 is used to extract gear oil from the main drive 600 of the tunneling machine, the filtering mechanism 200 is used to filter impurities in the gear oil extracted by the oil extraction mechanism 100, and the conveying mechanism 300 is used to convey the gear oil filtered by the filtering mechanism 200 to various lubrication points of the reducer.

[0031] In this embodiment, the oil extraction mechanism 100 is used to extract gear oil from the reducer of the main drive 600; in other embodiments, the oil extraction mechanism 100 can also extract gear oil from other locations of the main drive 600; the gear oil can also be transported to other locations of the main drive 600 or the tunneling machine that require lubrication by the conveying mechanism 300.

[0032] By adopting the above technical solution, the oil extraction mechanism 100 can actively extract gear oil from the reducer, allowing the gear oil to be actively delivered to each lubrication point of the reducer to achieve gear lubrication. This prevents the gear oil level from changing with the boom's pitch and roll, which could lead to insufficient gear lubrication. This ensures that the tunneling machine lubricates the gears while tunneling, reducing gear wear and extending the tunneling machine's service life, thus achieving sufficient lubrication of the reducer gears. Furthermore, it allows the tunneling machine to adapt to a horizontal cutterhead arrangement. The filter mechanism 200 removes impurities from the gear oil, preventing them from being transported into the reducer and causing gear wear, thereby improving the gear lubrication effect.

[0033] like Figure 1 As shown, the oil extraction mechanism 100 includes a hydraulic pump 110 and a drive assembly 120. The drive assembly 120 is used to drive the hydraulic pump 110 to extract gear oil from the reducer. In this embodiment, the hydraulic pump 110 is classified into a variable pump and a fixed-displacement pump according to whether the flow rate is adjustable. A pump whose output flow rate can be adjusted as needed is called a variable pump, and a pump whose flow rate cannot be adjusted is called a fixed-displacement pump. In this embodiment, the hydraulic pump 110 is set as a variable pump. By adjusting the flow rate of the hydraulic pump 110, it is easy to adjust the flow rate of the gear oil, thereby further improving the lubrication effect on the gears in the reducer. In other embodiments, the hydraulic pump 110 can also be set as a gear pump, vane pump, or piston pump.

[0034] By adopting the above technical solution, the hydraulic pump 110 can be driven by the drive component 120 to work, so that the hydraulic pump 110 can draw gear oil from the reducer. The arrangement of the hydraulic pump 110 and the drive component 120 has a simple structure and improves the extraction effect of gear oil from the reducer, thereby indirectly improving the lubrication effect of the gears.

[0035] like Figure 1 As shown, the drive assembly 120 includes a hydraulic motor 121 and a proportional multi-way valve 122. The proportional multi-way valve 122 is electrically connected to the cutterhead of the tunneling machine and is also electrically connected to the hydraulic motor 121. The proportional multi-way valve 122 is configured to energize and control the hydraulic motor 121 to rotate when the cutterhead rotates, thereby driving the hydraulic pump 110 to start pumping oil.

[0036] By adopting the above technical solution, the proportional multi-way valve 122 is linked with the cutterhead of the tunneling machine, so that the proportional multi-way valve 122 is energized when the cutterhead rotates, thereby enabling the hydraulic pump 110 to be started to lubricate the gears while the cutterhead is rotating, which further improves the lubrication effect of the gears when the cutterhead is working; the use of hydraulic motor 121 has a simple structure and improves the driving effect of hydraulic pump 110.

[0037] like Figure 1 As shown, the filtration mechanism 200 includes a filter disposed at the output end of the oil extraction mechanism 100. The filter is configured to remove impurities from the gear oil when the gear oil passes through the filter.

[0038] In this embodiment, the filter includes a connecting ring and a filter screen sealed within the connecting ring. The connecting ring is disposed on a pipeline for conveying gear oil. By adjusting the mesh diameter on the filter screen, the filter screen can filter impurities in the water.

[0039] By adopting the above technical solution, the filter has a simple structure. When gear oil passes through the filter, the filter can filter out impurities in the gear oil and has a good filtration efficiency for impurities in the gear oil, thereby improving the filtration effect on impurities in the gear oil extracted by the oil extraction mechanism 100.

[0040] like Figure 1 As shown, the conveying mechanism 300 includes a cooling component 310 and a distribution component 320. The cooling component 310 is used to cool the gear oil filtered by the filtering mechanism 200, and the distribution component 320 is used to evenly convey the gear oil cooled by the cooling component 310 to each lubrication point of the reducer.

[0041] By adopting the above technical solution and using the cooling component 310, the filtered gear oil can be cooled and then re-delivered to the various lubrication points of the reducer. The cooling of the gear oil, when it is re-delivered to the gears of the reducer, effectively cools the gears inside the reducer, preventing overheating and malfunctions caused by the gears overheating during cutter head rotation. This further improves the gear lubrication effect, thereby enhancing the reducer's driving effect on the cutter head. Furthermore, the distribution component 320 ensures that the gear oil is evenly distributed to all lubrication points of the reducer, resulting in more comprehensive lubrication of the gears and further improving the gear lubrication effect.

[0042] like Figure 1 As shown, the cooling assembly 310 includes a water cooler configured to cool the gear oil when it passes through the water cooler.

[0043] A water cooler, also called a water-cooled chiller, mainly consists of two parts: an outer shell and an internal cooler body. The outer shell includes a cylinder, a water distribution cover, and a return water cover. It has inlet and outlet oil pipes and inlet and outlet water pipes. The heat medium in the water-cooled chiller flows sequentially through various baffle channels from the inlet pipe on the cylinder to the outlet pipe. The cooler medium uses a two-pass flow: the cooler medium enters one half of the cooler tubes through the water distribution cover from the inlet, then flows into the other half of the cooler tubes through the return water cover and enters the other side of the water distribution cover and outlet pipe. During the two-pass flow, the cooler medium absorbs the residual heat released by the heat medium and is discharged from the outlet, maintaining the working medium at its rated operating temperature, thereby achieving the cooling of the gear oil.

[0044] By adopting the above technical solution, when the gear passes through the water cooler, the water cooler can cool the gear oil. The water cooler has a simple structure and improves the cooling effect of the gear oil.

[0045] like Figure 1As shown, the distribution component 320 includes a synchronous motor, which is used to evenly distribute the gear oil cooled by the cooling component 310 to each lubrication point of the reducer.

[0046] In this embodiment, the synchronous motor is also called a synchronous flow divider motor. A synchronous flow divider motor is a mechanical device composed of an electric motor and a pump. The main function of the synchronous flow divider motor is to synchronize the movement of two or more hydraulic cylinders. The motor can evenly distribute hydraulic oil to multiple hydraulic cylinders, thereby keeping the movement of multiple hydraulic cylinders the same. In this embodiment, the synchronous motor is used to evenly distribute gear oil to the locations of multiple lubrication points, thereby achieving simultaneous lubrication of multiple lubrication points.

[0047] By adopting the above technical solution, the synchronous motor can evenly distribute gear oil to each lubrication point of the reducer. The synchronous motor has a simple structure and improves the lubrication effect on the internal gears of the reducer.

[0048] like Figure 1 As shown, the cutter head gear oil lubrication and cooling system also includes a detection and alarm mechanism 400, which is configured to detect the level of gear oil in the reducer and issue an alarm when the level of gear oil is lower than the minimum preset level or higher than the maximum preset level.

[0049] By adopting the above technical solution, the detection alarm mechanism 400 can detect the gear oil level in the reducer, triggering an alarm when the gear oil level is lower than the minimum preset level. When the gear oil level in the reducer is too low, the hydraulic pump 110 will be unable to draw gear oil, resulting in failure to lubricate the gears. Furthermore, when the gear oil level is too low, it will cause the gears to dry-grind and malfunction. The detection alarm mechanism 400 facilitates timely detection of the minimum gear oil level, allowing for prompt personnel response. The detection alarm mechanism 400 can also detect the gear oil level in the reducer, triggering an alarm when the gear oil level is higher than the maximum preset level. When the gear oil level in the reducer is too high, it will cause oil bubbles to form during gear operation, affecting the normal operation of the gears. The detection alarm mechanism 400 facilitates timely detection of the maximum gear oil level, allowing for prompt personnel response.

[0050] like Figure 1 As shown, the detection alarm mechanism 400 includes a first pressure sensor 410 and a second pressure sensor 420. The first pressure sensor 410 is used to detect the lowest level of gear oil in the reducer, and the second pressure sensor 420 is used to detect the highest level of gear oil in the reducer.

[0051] In this embodiment, the first pressure sensor 410 and the second pressure sensor 420 are devices or apparatuses that can sense pressure signals and convert them into usable output electrical signals according to a certain rule. The first pressure sensor 410 and the second pressure sensor are typically composed of a pressure-sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors, and absolute pressure sensors. By detecting the pressure inside the reducer through the first pressure sensor 410 and the second pressure sensor 420, the change in the liquid level inside the reducer can be determined. In other embodiments, the first pressure sensor 410 and the second pressure sensor 420 can be replaced with liquid level sensors. The use of liquid level sensors can also achieve the detection of the gear oil level inside the reducer.

[0052] By adopting the above technical solution, the first pressure sensor 410 is used to facilitate the detection of the lowest level of gear oil in the reducer, and the second pressure sensor 420 is used to facilitate the detection of the highest level of gear oil in the reducer, thereby improving the detection effect of gear oil level.

[0053] like Figure 1 As shown, the cutter head gear oil lubrication and cooling system also includes a monitoring component 500, which is electrically connected to the cutter head. The monitoring component 500 is configured to monitor the flow rate of gear oil entering the conveying mechanism 300 and stop the cutter head rotation when the flow rate is lower than the preset flow rate.

[0054] In this embodiment, the monitoring device 500 includes a flow meter, which includes differential pressure flow meters, rotor flow meters, throttling flow meters, slit flow meters, volumetric flow meters, electromagnetic flow meters, and ultrasonic flow meters, etc. In this embodiment, an electromagnetic flow meter is used to monitor the flow rate of gear oil. The working principle of the electromagnetic flow meter is mainly based on Faraday's law of electromagnetic induction. It uses electromagnetic induction to generate an induced electromotive force to measure the flow rate of the fluid. When a liquid or conductive medium flows in a direction perpendicular to the magnetic field, it cuts the magnetic lines of force, thereby generating an induced electromotive force. The magnitude of this electromotive force is proportional to the flow velocity of the fluid, which is related to the cross-sectional area of ​​the pipe and the average flow velocity of the liquid.

[0055] By adopting the above technical solution, when the flow rate of gear oil entering the conveying mechanism 300 is too low, the gear oil cannot be evenly delivered to the various lubrication points of the reducer, so that the gears in the reducer cannot be effectively lubricated. If the cutter disc continues to rotate at this time, it will cause the gears inside the reducer to malfunction. By setting the monitoring component 500, the cutter disc can be stopped in time when the flow rate of gear oil is lower than the preset flow rate, thereby preventing the malfunction caused by insufficient gear oil and continuous rotation of the cutter disc.

[0056] like Figure 1As shown, when the cutterhead of the tunneling machine rotates, the proportional multi-way valve 122 is energized and controls the hydraulic motor 121 to rotate, causing the hydraulic pump 110 to start. This causes the hydraulic pump 110 to draw out the gear oil from the reducer. At this time, the gear oil passes through a filter to remove impurities. The filtered gear oil can then enter the water cooler for cooling. The cooled gear oil is then evenly distributed to each lubrication point of the reducer by the distribution motor to achieve lubrication. This prevents the gear oil level from changing with the boom's pitch and roll, which could lead to insufficient gear lubrication. This allows the tunneling machine to lubricate and cool the gears while tunneling, reducing gear wear and preventing malfunctions caused by gear overheating. This indirectly improves the performance of the reducer and extends the service life of the tunneling machine.

[0057] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A cutter head gear oil lubrication and cooling system, characterized in that, It includes an oil extraction mechanism (100), a filtering mechanism (200), and a conveying mechanism (300). The oil extraction mechanism (100) is used to extract gear oil from the main drive (600) of the tunneling machine. The filtering mechanism (200) is used to filter impurities in the gear oil extracted by the oil extraction mechanism (100). The conveying mechanism (300) is used to convey the gear oil filtered by the filtering mechanism (200) to various lubrication points of the reducer.

2. The cutter head gear oil lubrication and cooling system according to claim 1, characterized in that, The oil extraction mechanism (100) includes a hydraulic pump (110) and a drive assembly (120), the drive assembly (120) being used to drive the hydraulic pump (110) to extract gear oil from the reducer.

3. The cutter head gear oil lubrication and cooling system according to claim 2, characterized in that, The drive assembly (120) includes a hydraulic motor (121) and a proportional multi-way valve (122). The proportional multi-way valve (122) is electrically connected to the cutterhead of the tunneling machine and is also electrically connected to the hydraulic motor (121). The proportional multi-way valve (122) is configured to energize and control the hydraulic motor (121) to rotate when the cutterhead rotates, thereby driving the hydraulic pump (110) to start pumping oil.

4. The cutter head gear oil lubrication and cooling system according to claim 1, characterized in that, The filtration mechanism (200) includes a filter disposed at the output end of the oil extraction mechanism (100), the filter being configured to remove impurities from the gear oil as it passes through the filter.

5. The cutter head gear oil lubrication and cooling system according to any one of claims 1-4, characterized in that, The conveying mechanism (300) includes a cooling component (310) and a distribution component (320). The cooling component (310) is used to cool the gear oil filtered by the filtering mechanism (200), and the distribution component (320) is used to uniformly convey the gear oil cooled by the cooling component (310) to each lubrication point of the reducer.

6. The cutter head gear oil lubrication and cooling system according to claim 5, characterized in that, The cooling assembly (310) includes a water cooler configured to cool gear oil as it passes through the water cooler.

7. The cutter head gear oil lubrication and cooling system according to claim 5, characterized in that, The distribution assembly (320) includes a synchronous motor for uniformly distributing the gear oil cooled by the cooling assembly (310) to each lubrication point of the reducer.

8. The cutter head gear oil lubrication and cooling system according to any one of claims 1-4, characterized in that, It also includes a detection alarm mechanism (400), which is configured to detect the level of gear oil in the reducer and issue an alarm when the level of gear oil is lower than a minimum preset level or higher than a maximum preset level.

9. The cutter head gear oil lubrication and cooling system according to claim 8, characterized in that, The detection alarm mechanism (400) includes a first pressure sensor (410) and a second pressure sensor (420). The first pressure sensor (410) is used to detect the lowest level of gear oil in the reducer, and the second pressure sensor (420) is used to detect the highest level of gear oil in the reducer.

10. The cutter head gear oil lubrication and cooling system according to any one of claims 1-4, characterized in that, It also includes a monitoring element (500) for electrical connection with the cutter head, the monitoring element (500) being configured to monitor the flow rate of gear oil entering the conveying mechanism (300) and stop the rotation of the cutter head when the flow rate is lower than a preset flow rate.

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