Drum type rotary filter screen driving device

Abstract

The invention relates to the field of machinery, in particular to a drum type rotary filter screen driving device. According to the device, a power output gear is meshed with a first transmission gear and a second transmission gear at the same time; the first transmission gear, the second transmission gear and the power output gear are all installed on the gear disc. The chain disc is connected with the replacement control gear through a transmission chain; the replacement control gear drives the gear disc to rotate; the laser sensor monitors the states of the first transmission gear and the second transmission gear; the water pipe is erected above the drum-shaped filter screen rack; a high-pressure nozzle is arranged at the end of the water pipe; an angle adjusting unit is arranged at the joint of the high-pressure nozzle and the water pipe; the lubricating oil nozzle is arranged in a gap between the first transmission gear and the power output gear; and the control unit is used for receiving the gear abrasion loss information of the laser sensor and starting water filling, transmission gear replacement or lubricating oil adding of the lubricating module. According to the invention, the service cycle is prolonged, the drum net out-of-service time is reduced, and the reliability of equipment is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of machinery, in particular to a drum type rotary screen driving device. BACKGROUND

[0002] The drum type rotary screen is the core equipment of the seawater filtering system of nuclear power plants and other industries. The drum screen mainly consists of a driving device, a main shaft, a drum skeleton, a sealing system, a lubrication and flushing device, and an automatic control system. The driving device is connected to a speed reducer by a motor, the output shaft of the speed reducer is connected through a safety coupling and a transmission shaft, the other end of the transmission shaft is installed with a driving pinion and is engaged with the gear ring on the drum skeleton, forming an open meshing system.

[0003] At present, the sand content in the seawater of some nuclear power plants is high. When the drum screen is running, sand particles will contact the tooth surface. With the meshing of the gears, the tooth surface will be severely worn, causing the rack and pinion to wear out prematurely and not meeting the requirements of one operating cycle of the power plant. At present, the pinion has been replaced with nylon material to improve the problem. However, the large gear can meet the requirements of one operating cycle, but the pinion cannot meet the requirements of one operating cycle due to the large transmission ratio and the limitation of its material. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a drum type rotary screen driving device to prolong the service life.

[0005] The present application provides a drum type rotary screen driving device, which comprises a gear replacement module, a water flow flushing module and a lubrication module. The gear replacement module comprises a transmission shaft connected with a power output gear, and the power output gear is engaged with a first transmission gear and a second transmission gear to provide power for both. The first transmission gear, the second transmission gear and the power output gear are all installed on a gear disc. The replacement control gear and the chain disc are fixed on the base, and the chain disc provides power for the replacement control gear, and the replacement control gear and the chain disc are connected with each other through a transmission chain. The replacement control gear provides power for the gear disc to drive the gear disc to rotate. The laser sensor monitors the state of the first transmission gear and the second transmission gear. The water flow flushing module comprises a water pipe erected above the drum type filter screen rack. The end of the water pipe is provided with a high-pressure nozzle for water spraying in a direction perpendicular to the drum type filter screen rack. An angle adjusting unit is arranged at the connection between the high-pressure nozzle and the water pipe to adjust the angle between the high-pressure nozzle and the drum type filter screen rack. The lubrication module comprises a lubricating oil nozzle and an oil tank. A lubricating oil nozzle is arranged in the gap between the first transmission gear and the power output gear, and the lubricating oil nozzle is connected with the oil tank; A control unit is configured to receive the gear wear information of the laser sensor, control the water flushing module to start water filling, transmission gear replacement, or control the lubricating module to add lubricating oil.

[0006] In an embodiment of the present application, the laser sensor is a planar array laser radar, which detects the outer contour of the first transmission gear and the second transmission gear to obtain three-dimensional data of the gear contour; The three-dimensional data of the gear in service and the data of the original gear contour are overlapped and compared to obtain the wear information of the gear; The control unit receives the wear information, and when the wear exceeds a set threshold, triggers the transmission gear replacement.

[0007] In an embodiment of the present application, when the tooth thickness wear of more than 20% of the teeth exceeds 5mm, the replacement program is triggered.

[0008] In an embodiment of the present application, the angle adjusting unit includes an upward angle adjusting bolt and a downward angle adjusting bolt. The upward angle adjusting bolt and the downward angle adjusting bolt are arranged on the end face of the water pipe, and a high-pressure nozzle is arranged between the two.

[0009] In an embodiment of the present application, the water flow flushing module further includes a water pump and a water pipe support. The water pump is installed on the side surface of the base on the ground, and the water pipe support is connected thereto; the water pipe is led out from the water pump outlet, passes through the water pipe support, and extends above the drum-type filter screen rack.

[0010] In an embodiment of the present application, the wear resistance of the power output gear is higher than that of the drum-type filter screen rack.

[0011] In an embodiment of the present application, an air pressure valve is arranged on the oil tank to control the oil outlet of the lubricating oil nozzle. The oil tank is arranged on the chain shell. The chain shell is provided with a chain disc.

[0012] In an embodiment of the present application, the control unit controls the water flushing module to flush with N times of normal water flow before starting the replacement of the transmission gear in ascending order, and N is 2-5.

[0013] In an embodiment of the present application, the control unit controls the transmission gear to be replaced when the drum screen switches to a low-speed running mode.

[0014] In a specific embodiment of the present application, the transmission shaft is connected with the power mechanism. The power mechanism is distributed at 90 degrees with the base.

[0015] Compared with the prior art, the drum-type rotary filter screen driving device has the following beneficial effects: 1) The device replaces the gear through gear meshing, prolongs the service life of the drum-type rotary filter screen driving device, ensures that no gear replacement operation is needed in a cycle, reduces the downtime of the drum screen, and ensures the reliability of the equipment; 2) The device reduces the radial cutting force on the teeth of the transmission gear through load dispersion, thereby reducing the wear of the transmission gear; 3) The device is designed with a water flow flushing module to flush away fine sand on the rack, reducing the wear of the transmission gear; 4) The device controls the replacement of the chain take-up control gear, and internally uses a one-way buckle gear to fix the coiled chain, which can bear greater load and is more firmly fixed; 5) The device automatically applies lubricating oil at the gear meshing position, solving the difficulty of not being able to apply lubricating oil regularly; 6) The device uses pure physical mechanical transmission, has a compact structure, and is not easy to deform; 7) The device is mostly controlled by a semi-automatic mechanism, which is convenient for operators to operate; 8) The device is monitored by a laser sensing system, reducing the personnel inspection input during service. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A front view of the drum-type rotary filter screen driving device is shown. Figure 2 A perspective view of the drum-type rotary filter screen driving device is shown. Figure 3 A partial structure view of the transmission gear of the drum-type rotary filter screen driving device is shown. Figure 4 A detailed view of the water flow flushing module is shown. Figure 5 A schematic view of the gear replacement process is shown. Figure 6 A front view of the drum-type rotary filter screen driving device before replacement is shown. Figure 7 A rear view of the drum-type rotary filter screen driving device before replacement is shown. Figure 8 A front view of the drum-type rotary filter screen driving device after replacement is shown. In the figure, 1-high pressure nozzle; 2-water pipe; 3-first transmission gear; 4-power output gear; 5-gear disc; 6-drum-shaped filter rack; 7-second transmission gear; 8-replacement control gear; 9-chain shell; 10-chain disc; 11-water pump; 12-power mechanism; 13-gear shaft; 14-lubricating oil nozzle; 16-laser sensor; 18-base; 19-water pipe support; 20-transmission shaft; 21-oil tank; 22-air pressure valve, 23-upward angle adjusting bolt, 24-downward angle adjusting bolt. DETAILED DESCRIPTION

[0017] In order to further understand the present application, the embodiments of the present application are described below in conjunction with the examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present application, but not for limiting the present application.

[0018] The drum-shaped rotary filter driving device of the present application can flush the rack of the drum-shaped filter, and prolong the service life of the drum-shaped filter through regular lubrication and seamless replacement of the transmission gears.

[0019] The embodiments of the present application disclose a drum-shaped rotary filter driving device, as shown in Figure 1 and Figure 2 , comprising a gear replacement module, a water flow flushing module and a lubricating module. The gear replacement module comprises: The transmission shaft 20 is connected with the power output gear 4, and the transmission shaft 20 is connected with the power mechanism 12. The power mechanism 12 is distributed at 90 degrees with the base 18.

[0020] In order to replace the transmission gears, the control of the gear disc should adopt a high-power chain transmission mechanism to adapt to the huge load between the drum-shaped filter rack 6 and the transmission gears.

[0021] The power output gear 4 is simultaneously engaged with the first transmission gear 3 and the second transmission gear 7 to provide power for both; the power output gear 4 is a driving gear and is the power source of the gear replacement module; the first transmission gear 3 and the second transmission gear 7 are driven gears. The material of the power output gear 4 in the device is high-strength wear-resistant metal, which can be selected as 42CrMo and is treated by quenching and tempering and surface nitriding. Since the transmission ratio of the power output gear 4 and the drum-shaped filter rack 6 is extremely high, the use of the same material as the rack will also cause great wear, so a metal with extremely high wear resistance is selected as the material of the power output gear 4. The first transmission gear 3, the second transmission gear 7 and the power output gear 4 are all installed on the gear disc 5; when the gear disc 5 rotates, the relative positions between the first transmission gear 3 and the second transmission gear 7 also change. Figure 3As shown, two shafts are arranged outside the gear disc 5, and the first transmission gear 3 and the second transmission gear 7 are installed on the corresponding shafts and are in sliding connection with the shafts.

[0022] The power output gear 4 is fixedly installed on the transmission shaft 20, and the gear disc 5 is in sliding connection with the transmission shaft 20. The transmission shaft 20 drives the power output gear 4 to rotate. Since the first transmission gear 3 and the second transmission gear 7 are both in meshing connection with the power output gear 4, both of them also rotate to drive the drum filter screen rack 6 to rotate.

[0023] The gear disc 5 is a half gear, which only needs to act once in a period of service to switch the meshing connection between the first transmission gear 3 and the drum filter screen rack 6 to the meshing connection between the second transmission gear 7 and the drum filter screen rack 6. The rotation angle of the action is 120°.

[0024] The replacement control gear 8 and the chain disc 10 are fixed on the base 18, and the chain shell 9 covers the chain disc 10 to prevent water vapor, 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, and the two are connected through a transmission chain.

[0025] The replacement control gear 8 provides power for the gear disc 5 to rotate; The laser sensor 16 is arranged in the gap between the first transmission gear 3 and the second transmission gear 7 to monitor the state of the first transmission gear 3 and the second transmission gear 7. The laser sensor 16 is preferably a planar array laser radar, which detects the outline of the first transmission gear 3 and the second transmission gear 7 to obtain three-dimensional data of the gear profile. The three-dimensional data of the in-service state of the obtained gear is overlapped and compared with the data of the original profile of the gear to obtain the wear information of the gear. The control unit receives the wear information, and when the wear exceeds the set threshold, triggers the replacement of the transmission gear.

[0026] Specifically, at the initial service, the first transmission gear 3 is first in meshing connection with the drum filter screen rack 6 to drive the drum screen to rotate. As the service time increases, when the first transmission gear 3 is worn to the boundary that does not meet the requirements, the laser sensor 16 monitors and sends a signal for preliminary replacement, and waits for the drum screen to switch to the low-speed operation mode. If it is already in the low-speed operation mode, there is no need to wait. In the low-speed operation mode, the replacement control gear 8 drives the gear disc 5 to rotate, so that the second transmission gear 7 is in meshing connection with the drum filter screen rack 6. After the meshing connection is completed, the power mechanism 12 starts to drive the drum screen again through the second transmission gear 7, thereby completing the process of replacing the transmission gear.

[0027] Preferably, the replacement procedure is triggered when the tooth thickness of more than 20% of the teeth is worn by more than 5 mm.

[0028] The water flow flushing module, such as Figure 4 As shown, it includes: a water pipe 2, which is mounted above the drum filter rack 6; The end of the water pipe 2 is provided with a high-pressure nozzle 1, which sprays water in a direction perpendicular to the drum filter rack 6 to reduce the sediment on the surface of the drum filter rack, indirectly reducing the wear of the transmission gear and improving its service life; The connection between the high-pressure nozzle 1 and the water pipe 2 is provided with an angle adjustment unit for adjusting the angle between the high-pressure nozzle 1 and the drum filter rack 6; The angle adjustment unit includes an upward angle adjustment bolt and a downward angle adjustment bolt; An upper elevation angle adjustment bolt and a lower depression angle adjustment bolt are respectively provided on the end surface of the water pipe, and a high-pressure nozzle is provided between the two; When the high-pressure nozzle needs to be deflected downward, loosen the upper elevation angle adjustment bolt, and then tighten the lower elevation angle adjustment bolt to the appropriate depth. When the high-pressure nozzle angle is appropriate, tighten the upper elevation angle adjustment bolt, and vice versa.

[0029] This allows for directional flushing of the rack and facilitates adjustment during installation.

[0030] The water pump 11 is mounted on the side of the base 18 on the ground and is connected to the water pipe bracket 19. The water pipe 2 is made of rigid 304 austenitic stainless steel and is drawn from the outlet of the water pump 11, passes through the water pipe bracket 19 and extends to the top of the drum filter rack 6.

[0031] The water pump 11 is connected to the domestic drinking water system of the power plant, extracts the filtered and settled clean water in the domestic drinking water system, and transports it to the water pipe bracket 19, and enters the high-pressure nozzle 1 along the water pipe 2.

[0032] The lubrication module includes: a lubricating oil nozzle, an oil tank, and an air pressure valve; The lubricating oil nozzle 14 is set in the middle of the gap between the first transmission gear 3 and the power output gear 4, and the distance from the outermost circle of the two gear contours is controlled between 1-2 cm. Since the angle of the lubricating oil nozzle 14 is relatively fixed to the gear plate 5, the lubricating oil can be applied even after the gear is replaced; The lubricating oil nozzle 14 is connected to the oil tank 21; The oil tank 21 is provided with an air pressure valve 22, which pressurizes the oil tank 21 so that the lubricating oil nozzle 14 can squeeze out the lubricating oil; The oil tank 21 is provided on the chain case 9 .

[0033] The control unit receives the gear wear information of the laser sensor, controls the water flushing module to start water filling, transmission gear replacement or lubricating oil adding of the lubricating module.

[0034] The control unit controls the water flushing module to flush with N times of normal water flow before starting the transmission gear replacement ascending order, and N is 2-5.

[0035] Specifically, 30s before starting the gear replacement program, the water flow flushing module flushes with 2 times of normal water flow to remove the silt more thoroughly, and 30s after completing the whole gear replacement program, the normal water flow is restored.

[0036] Combining the gear replacement module and the water flow flushing module, the whole gear replacement process is as shown in Figure 5 .

[0037] The remaining parts are structural auxiliary parts, and the relevant work schematic diagram is as shown in Figure 6 , Figure 7 , Figure 8 .

[0038] The application changes the gear set without affecting the operation of the drum filter screen, and achieves the effects of prolonging the service life of the driving device, not affecting the operation of the drum filter screen and high efficient and stable structure, so as to prolong the in-service period of the drum filter screen gear.

[0039] The above description of the embodiments is only used to help understand the method of the application and its core idea. It should be noted that, for those skilled in the art, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

[0040] The above description of the disclosed embodiments enables those skilled in the art to implement or use the application. Various modifications to the embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the application. Therefore, the application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drum type rotary filter driving device, characterized in that: include: Gear replacement module, water flushing module, lubrication module; The gear replacement module includes: a transmission shaft connected to a power output gear, the power output gear is engaged with the first transmission gear and the second transmission gear at the same time to provide power to both; The outer side of the gear plate is fixedly connected to two shafts, and the first transmission gear and the second transmission gear are installed on the corresponding shafts and are slidably connected to the shafts; the gear plate is slidably connected to the transmission shafts; The replacement control gear and the chain disc are fixed on the base. The chain disc provides power for the replacement control gear and is connected to the replacement control gear through a transmission chain. The replacement control gear provides power to the gear plate, driving the gear plate to rotate; The laser sensor monitors the status of the first transmission gear and the second transmission gear; The water flushing module includes: a water pipe, which is mounted above the rack of the drum filter; The end of the water pipe is provided with a high-pressure nozzle, which sprays water in a direction perpendicular to the rack of the drum filter; The connection between the high-pressure nozzle and the water pipe is provided with an angle adjustment unit for adjusting the angle between the high-pressure nozzle group and the drum filter rack; The lubrication module includes: a lubricating oil nozzle and an oil tank; The lubricating oil nozzle is arranged 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 is used to receive gear wear information from the laser sensor, control the water flushing module to start water filling, transmission gear replacement, or start the lubrication module to add lubricating oil.

2. The drum type rotary filter driving device according to claim 1, characterized in that: The laser sensor is an array 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; Overlap and compare the three-dimensional data of the gear in service with the data of the original gear profile to obtain the gear wear information; 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 type rotary filter driving device according to claim 2, characterized in that: When the tooth thickness wear of more than 20% of the teeth exceeds 5mm, the replacement program is triggered.

4. The drum type rotary filter driving device according to claim 1, characterized in that: The angle adjustment unit includes an upward angle adjustment bolt and a downward angle adjustment bolt; An upper elevation angle adjustment bolt and a lower depression angle adjustment bolt are respectively arranged on the end surface of the water pipe, and a high-pressure nozzle is arranged between the two.

5. The drum type rotary filter driving 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 bracket is connected to it; the water pipe is led out from the water pump outlet, passes through the water pipe bracket and extends to the top of the drum filter rack.

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

7. The drum type rotary filter driving device according to claim 1, characterized in that: An air pressure valve is provided on the oil tank to control the oil output from the lubricating oil nozzle; The oil tank is set on the chain housing; A chain disc is arranged in the chain housing.

8. The drum type rotary filter driving device according to claim 1, characterized in that: The control unit controls the water flushing module to flush with N times the normal water volume before starting the transmission gear replacement ascending sequence, where N is 2-5.

9. The drum type rotary filter driving device according to claim 1, characterized in that: The control unit controls the transmission gear to be replaced when the drum network is switched to the low-speed operation mode.

10. The drum type rotary filter driving device according to claim 1, characterized in that: The transmission shaft is connected to the power mechanism; The power mechanism and the base are distributed at 90 degrees.

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