A drum-type rotary screen driving device

Abstract

The present application relates to the field of machinery, especially to drum type rotary screen driving device, the device comprises: power output gear is engaged with first transmission gear and second transmission gear; first transmission gear, second transmission gear and power output gear are installed on gear disc; chain disc and replacement control gear are connected by transmission chain; replacement control gear drives gear disc to rotate; laser sensor monitors the state of first transmission gear and second transmission gear; water pipe is erected above drum type screen rack; the end of water pipe is provided with high pressure nozzle; angle adjusting unit is arranged at the connection of high pressure nozzle and water pipe; lubricating oil nozzle is arranged in the gap between first transmission gear and power output gear; control unit is used for receiving gear wear information of laser sensor, starting water filling, transmission gear replacement or starting lubricating module to add lubricating oil; the present application improves the service life, reduces the drum net downtime, and ensures the reliability of the equipment.

Description

Technical Field

[0001] This invention relates to the field of machinery, and more particularly to a drum-shaped rotary filter drive device. Background Technology

[0002] Rotary drum filters are core equipment in seawater filtration systems for nuclear power plants and water filtration systems in other industries. The drum filter mainly consists of a drive unit, main shaft, drum frame, sealing system, lubrication and flushing devices, and automatic control system. The drive unit is a motor connected to a reducer. The reducer's output shaft is connected to a drive shaft via a safety coupling. A drive pinion is mounted on the other end of the drive shaft and meshes with a gear ring on the drum frame, forming an open meshing system.

[0003] Currently, some nuclear power plants have high sediment content in the seawater. During the operation of the power grid, sand particles are present on the contact surfaces of the gear teeth. As the gears mesh, the tooth surfaces experience severe wear, leading to premature wear and failure of the rack and pinion, thus failing to meet the requirements of a full operating cycle. An improvement has been made to address this issue by replacing the pinion with nylon material. While the large gear can now complete one operating cycle, the pinion, due to its excessively high transmission ratio and material limitations, fails to meet the required operating cycle. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a drum-shaped rotating filter drive device to extend its service life.

[0005] This invention provides a drum-shaped rotary filter drive device, comprising: a gear replacement module, a water flushing module, and a lubrication module;

[0006] The gear replacement module includes: a drive shaft connected to a power output gear, the power output gear meshing with both the first drive gear and the second drive gear to provide power to both;

[0007] The first transmission gear, the second transmission gear, and the power output gear are all mounted on the gear disk;

[0008] The replacement control gear and chain are fixed on the base. The chain provides power to the replacement control gear and is connected to the replacement control gear by a transmission chain.

[0009] The control gears are replaced to provide power to the gear disk, driving the gear disk to rotate;

[0010] A laser sensor monitors the state of the first and second transmission gears;

[0011] The water flushing module includes: a water pipe, mounted above the drum-shaped filter rack;

[0012] The end of the water pipe is equipped with a high-pressure nozzle, which sprays water in a direction perpendicular to the toothed bar of the drum filter screen.

[0013] An angle adjustment unit is provided at the connection between the high-pressure nozzle and the water pipe, which is used to adjust the angle between the high-pressure spray assembly and the drum-shaped filter rack.

[0014] The lubrication module includes: a lubricating oil nozzle and an oil tank;

[0015] The lubricating oil nozzle is positioned in the gap between the first transmission gear and the power output gear, and the lubricating oil nozzle is connected to the oil tank.

[0016] The control unit receives gear wear information from the laser sensor and controls the water flushing module to start filling with water, replace transmission gears, or start the lubrication module to add lubricating oil.

[0017] In one specific embodiment of the present invention, the laser sensor is a planar laser radar, which detects the outer contours of the first transmission gear and the second transmission gear to obtain three-dimensional data of the gear contours.

[0018] The obtained three-dimensional data of the gear in service state is overlaid and compared with the data of the original gear contour to obtain the wear information of the gear.

[0019] The control unit receives the wear information and triggers the replacement of the transmission gear when the wear exceeds a set threshold.

[0020] In one specific embodiment of the present invention, when the tooth thickness wear of more than 20% of the teeth exceeds 5mm, a replacement procedure is triggered.

[0021] In one specific embodiment of the present invention, the angle adjustment unit includes an upward tilt angle adjustment bolt and a downward tilt angle adjustment bolt;

[0022] An upward tilting angle adjustment bolt and a downward tilting angle adjustment bolt are respectively installed on the end face of the water pipe, and a high-pressure nozzle is installed between the two.

[0023] In one specific embodiment of the present invention, the water flushing module further includes a water pump and a water pipe support;

[0024] The water pump is installed on the side of the base on the ground, and the water pipe support is connected to it; the water pipe is led out from the water pump outlet, passes through the water pipe support and extends to the top of the drum-shaped filter rack.

[0025] In one specific embodiment of the present invention, the wear resistance of the power output gear is higher than that of the drum-shaped filter rack.

[0026] In one specific embodiment of the present invention, a pressure valve is provided on the oil tank to control the oil output of the lubricating oil nozzle;

[0027] The oil tank is located on the chain housing;

[0028] A chain disc is installed inside the chain shell.

[0029] In one specific embodiment of the present invention, the control unit controls the water flushing module to flush with N times the normal water volume before starting the transmission gear replacement sequence, where N is 2 to 5.

[0030] In one specific embodiment of the present invention, the control unit controls the transmission gears to change when the drum mesh is switched to a low-speed operating mode.

[0031] In one specific embodiment of the present invention, the transmission shaft is connected to the power mechanism;

[0032] The power mechanism is positioned at a 90-degree angle to the base.

[0033] Compared with the prior art, the drum-shaped rotary filter drive device of the present invention has the following advantages:

[0034] 1) This device replaces gears through gear meshing, which improves the service life of the drum-type rotary filter drive device, ensuring that no gear replacement is required within one cycle, reducing drum downtime and ensuring equipment reliability.

[0035] 2) This device reduces the radial shear force on the teeth of the transmission gear by distributing the load, thereby reducing the wear of the transmission gear;

[0036] 3) This device is designed with a water flushing module to wash away fine mud and sand on the rack, reducing wear on the transmission gears;

[0037] 4) This device controls the chain winding and unwinding, and the internal one-way snap-lock gears fix the coiled chain, which can withstand greater loads and is more securely fixed;

[0038] 5) This device uses automatic lubricant application at the gear meshing points, solving the difficulty of not being able to apply lubricant periodically;

[0039] 6) This device uses purely physical mechanical transmission, has a compact structure, and is not easily deformed;

[0040] 7) This device is mostly controlled by a semi-automatic mechanism, which makes it convenient for operators to operate;

[0041] 8) This device uses a laser sensing system for monitoring, reducing the need for personnel inspections during service. Attached Figure Description

[0042] Figure 1 This is a front view of the drum-shaped rotary filter drive unit.

[0043] Figure 2This diagram shows the overall structure of the drum-shaped rotary filter drive unit.

[0044] Figure 3 A structural diagram showing the transmission gear section of the drum-shaped rotary filter drive device;

[0045] Figure 4 A detailed schematic diagram of the water flow flushing module;

[0046] Figure 5 A schematic diagram illustrating the gear replacement process;

[0047] Figure 6 This is a front view of the drum-type rotary filter drive unit before replacement.

[0048] Figure 7 This is a rear view showing the operation of the drum-type rotary filter drive unit before replacement.

[0049] Figure 8 This is a front view of the drum-type rotary filter drive unit after it has been replaced.

[0050] In the diagram, 1-high pressure nozzle; 2-water pipe; 3-first transmission gear; 4-power output gear; 5-gear disc; 6-drum filter rack; 7-second transmission gear; 8-replacement control gear; 9-chain housing; 10-chain disc; 11-water pump; 12-power mechanism; 13-gear shaft; 14-lubricating oil nozzle; 16-laser sensor; 18-base; 19-water pipe bracket; 20-drive shaft; 21-oil tank; 22-air pressure valve; 23-upward tilt angle adjustment bolt; 24-downward tilt angle adjustment bolt. Detailed Implementation

[0051] To further understand the present invention, embodiments of the present invention are described below in conjunction with examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, and not for limiting the present invention.

[0052] The present invention provides a drum-shaped rotary filter drive device, which can wash the rack of the drum-shaped filter and extend the overall service life of the drum-shaped filter by regular lubrication and seamless replacement of transmission gears.

[0053] An embodiment of the present invention discloses a drum-shaped rotary filter driving device, such as... Figure 1 and Figure 2 As shown, it includes: a gear replacement module, a water flushing module, and a lubrication module;

[0054] The gear replacement module includes:

[0055] The drive shaft 20 is connected to the power output gear 4, and the drive shaft 20 is connected to the power mechanism 12;

[0056] The power mechanism 12 is positioned at a 90-degree angle to the base 18.

[0057] To facilitate the replacement of the transmission gears, the gear disk control should employ a high-power chain transmission mechanism to accommodate the enormous load between the drum-shaped filter rack 6 and the transmission gears.

[0058] The power output gear 4 meshes with both the first transmission gear 3 and the second transmission gear 7, providing power to both; the power output gear 4 is the driving gear and the power source for the gear replacement module; the first transmission gear 3 and the second transmission gear 7 are the driven gears.

[0059] The power output gear 4 in this device is made of a high-strength, wear-resistant metal, such as 42CrMo, and has undergone quenching and tempering with nitriding treatment. Because the transmission ratio between the power output gear 4 and the drum-shaped filter rack 6 is extremely high, using the same material as the rack would result in significant wear. Therefore, a metal with extremely high wear resistance was chosen for the power output gear 4. The first transmission gear 3, the second transmission gear 7, and the power output gear 4 are all mounted on the gear disk 5; when the gear disk 5 rotates, the relative positions between the first transmission gear 3 and the second transmission gear 7 also change accordingly. Figure 3 As shown, two shafts are provided on the outer side of the gear disk 5. The two shafts are fixedly connected to the gear disk 5. The first transmission gear 3 and the second transmission gear 7 are installed on the corresponding shafts and are slidably connected to the shafts.

[0060] The power output gear 4 is fixedly mounted on the drive shaft 20, and the gear disk 5 is slidably connected to the drive shaft 20. The drive shaft 20 drives the power output gear 4 to rotate. Since the first drive gear 3 and the second drive gear 7 are both meshed with the power output gear 4, they also rotate, thereby driving the drum-shaped filter rack 6 to rotate.

[0061] The gear disk 5 is a half gear, which only needs to operate once during one service cycle, switching the engagement of the first transmission gear 3 with the drum-shaped filter rack 6 to the engagement of the second transmission gear 7 with the drum-shaped filter rack 6. The rotation angle of one operation is 120°.

[0062] The replacement control gear 8 and the chain disc 10 are fixed on the base 18. The chain shell 9 covers the chain disc 10 to prevent moisture, dust and dirt from accumulating on the chain disc 10. At the same time, the chain disc 10 provides power for the rotation of the replacement control gear 8. The two are connected by a transmission chain.

[0063] The alternating control gear 8 provides power to the gear disk 5, driving the gear disk 5 to rotate;

[0064] A laser sensor 16 is disposed in the gap between the first transmission gear 3 and the second transmission gear 7 to monitor the status of the first transmission gear 3 and the second transmission gear 7.

[0065] The laser sensor 16 is preferably a planar laser radar, which detects the outer contours of the first transmission gear 3 and the second transmission gear 7 to obtain three-dimensional data of the gear contours.

[0066] The obtained three-dimensional data of the gear in service state is overlaid and compared with the data of the original gear contour to obtain the wear information of the gear.

[0067] The control unit receives the wear information and triggers the replacement of the transmission gear when the wear exceeds a set threshold.

[0068] Specifically, during initial service, the first transmission gear 3 initially meshes with the drum-shaped filter rack 6, driving the drum to rotate. As service time increases, the first transmission gear 3 wears down to the point of not meeting requirements. This is detected by the laser sensor 16, which sends a signal to prepare for replacement, waiting for the drum to switch to a low-speed operating mode. If it is already in low-speed operating mode, no waiting is required. In low-speed operating mode, the replacement control gear 8 drives the gear disk 5 to rotate, thereby causing the second transmission gear 7 to mesh with the drum-shaped filter rack 6. After meshing is complete, the power mechanism 12 restarts driving the drum via the second transmission gear 7, thus completing the transmission gear replacement process.

[0069] Preferably, a replacement procedure is triggered when the tooth thickness wear exceeds 5 mm for more than 20% of the teeth.

[0070] The water flushing module, such as Figure 4 As shown, it includes: a water pipe 2, which is mounted above the drum-shaped filter rack 6;

[0071] The end of the water pipe 2 is equipped with a high-pressure nozzle 1, which sprays water in a direction perpendicular to the drum-shaped filter rack 6 to reduce the mud and sand on the surface of the drum-shaped filter rack, thereby indirectly reducing the wear of the transmission gear and improving its service life.

[0072] An angle adjustment unit is provided at the connection between the high-pressure nozzle 1 and the water pipe 2, which is used to adjust the angle between the high-pressure nozzle 1 and the drum-shaped filter rack 6.

[0073] The angle adjustment unit includes an upward tilt angle adjustment bolt and a downward tilt angle adjustment bolt;

[0074] An upward tilting angle adjustment bolt and a downward tilting angle adjustment bolt are respectively installed on the end face of the water pipe, and a high-pressure nozzle is installed between the two.

[0075] When the high-pressure nozzle needs to be deflected downwards, loosen the upward tilt angle adjustment bolt, and then tighten the downward tilt angle adjustment bolt to the appropriate depth. Once the high-pressure nozzle angle is appropriate, tighten the upward tilt angle adjustment bolt again, and vice versa.

[0076] This allows for directional flushing of the rack and pinion, while also facilitating adjustment during installation.

[0077] The water pump 11 is installed on the side of the base 18 on the ground, and the water pipe bracket 19 is connected to it. The water pipe 2 is made of rigid 304 austenitic stainless steel, which is led out from the outlet of the water pump 11, passes through the water pipe bracket 19 and extends to the top of the drum-shaped filter rack 6.

[0078] The water pump 11 is connected to the power plant's domestic drinking water system. It draws filtered and settled clean water from the domestic drinking water system and delivers it to the water pipe support 19, which then enters the high-pressure nozzle 1 along the water pipe 2.

[0079] The lubrication module includes: a lubricating oil nozzle, an oil tank, and a pressure valve;

[0080] The lubricating oil nozzle 14 is located in the middle of the gap between the first transmission gear 3 and the power output gear 4, and the distance from the outermost ring of the two gear contours is controlled between 1-2cm. Since the angle of the lubricating oil nozzle 14 is relatively fixed with the gear disk 5, the lubricating oil can still be applied even after the gear is replaced.

[0081] Lubricating oil nozzle 14 is connected to oil tank 21;

[0082] The oil tank 21 is equipped with a pneumatic valve 22, which pressurizes the oil tank 21 to cause the lubricating oil nozzle 14 to squeeze out lubricating oil.

[0083] The oil tank 21 is located on the chain housing 9.

[0084] The control unit receives gear wear information from the laser sensor and controls the water flushing module to start filling with water, replace transmission gears, or start the lubrication module to add lubricating oil.

[0085] The control unit controls the water flushing module to flush with N times the normal water volume before starting the transmission gear replacement sequence, where N is 2 to 5.

[0086] Specifically, 30 seconds before the gear replacement program starts, the water flushing module will flush with twice the normal flow rate to more thoroughly remove mud and sand, and will return to normal flow rate 30 seconds after the entire gear replacement program is completed.

[0087] Combining the gear replacement module and the water flushing module, the entire gear replacement process is as follows: Figure 5 As shown.

[0088] The remaining parts are all structural auxiliary parts, and the relevant working diagrams are as follows: Figure 6 , Figure 7 , Figure 8 As shown.

[0089] This invention provides a method for replacing gear sets without affecting the operation of the drum filter. In this process, it achieves the effects of extending the service life of the drive device, not affecting the operation of the drum filter, and maintaining a highly efficient and stable structure, thereby extending the service life of the drum filter gears.

[0090] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0091] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drum-shaped rotary filter drive device, characterized in that, include: Gear replacement module, water flushing module, lubrication module; The gear replacement module includes: a drive shaft connected to a power output gear, the power output gear meshing with both the first drive gear and the second drive gear to provide power to both; Two shafts are fixedly connected to the outside of the gear disk. The first and second transmission gears are mounted on the corresponding shafts and are slidably connected to the shafts. The gear disk is slidably connected to the transmission shaft. The replacement control gear and chain are fixed on the base. The chain provides power to the replacement control gear and is connected to the replacement control gear by a transmission chain. The control gears are replaced to provide power to the gear disk, driving the gear disk to rotate; A laser sensor monitors the state of the first and second transmission gears; The water flushing module includes: a water pipe, mounted above the drum-shaped filter rack; The end of the water pipe is equipped with a high-pressure nozzle, which sprays water in a direction perpendicular to the toothed bar of the drum filter screen. An angle adjustment unit is provided at the connection between the high-pressure nozzle and the water pipe, which is used to adjust the angle between the high-pressure spray assembly and the drum-shaped filter rack. The lubrication module includes: a lubricating oil nozzle and an oil tank; The lubricating oil nozzle is positioned in the gap between the first transmission gear and the power output gear, and the lubricating oil nozzle is connected to the oil tank. The control unit receives gear wear information from the laser sensor and controls the water flushing module to start filling with water, replace transmission gears, or start the lubrication module to add lubricating oil.

2. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The laser sensor is a planar array lidar, which detects the outer contours of the first and second transmission gears to obtain three-dimensional data of the gear contours. The obtained three-dimensional data of the gear in service state is overlaid and compared with the data of the original gear contour to obtain the wear information of the gear. The control unit receives the wear information and triggers the replacement of the transmission gear when the wear exceeds a set threshold.

3. The drum-shaped rotary filter drive device according to claim 2, characterized in that, When the tooth thickness wear exceeds 5mm for more than 20% of the teeth, a replacement procedure is triggered.

4. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The angle adjustment unit includes an upward tilt angle adjustment bolt and a downward tilt angle adjustment bolt; An upward tilting angle adjustment bolt and a downward tilting angle adjustment bolt are respectively installed on the end face of the water pipe, and a high-pressure nozzle is installed between the two.

5. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The water flushing module also includes a water pump and a water pipe support; The water pump is installed on the side of the base on the ground, and the water pipe support is connected to it; the water pipe is led out from the water pump outlet, passes through the water pipe support and extends to the top of the drum-shaped filter rack.

6. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The wear resistance of the power output gear is higher than that of the drum-shaped filter rack.

7. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The oil tank is equipped with a pressure valve to control the oil output from the lubricating oil nozzle; The oil tank is located on the chain housing; A chain disc is installed inside the chain shell.

8. The drum-shaped rotary filter drive device according to claim 1, characterized in that, Before starting the transmission gear replacement program, the control unit controls the water flow flushing module to flush with N times the normal water volume, where N is 2 to 5.

9. The drum-shaped rotary filter drive device according to claim 1, characterized in that, When the drum mesh switches to low-speed operation mode, the control unit controls the transmission gears to change.

10. The drum-shaped rotary filter drive device according to claim 1, characterized in that, The drive shaft is connected to the power mechanism; The power mechanism is positioned at a 90-degree angle to the base.

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