How to judge the operating status of the slewing drive? Common faults and solutions

Slewing drives are widely used due to their modular installation convenience, operational stability, load-bearing capacity and strong environmental adaptability, etc., to improve industrial production efficiency and accelerate the realization of industrial automation. Then, once a failure occurs during the operation of the equipment, it may affect the normal production plan. For this reason, we should pay attention to the operation of the equipment and make timely judgments.

Judgment method of slewing drive operating state

SE Series Slewing Drive

1. Pay attention to the backhaul gap

During the operation of the equipment, observe the clearance of the rotary reducer during the return stroke, and judge the return clearance of the drive by the instant forward and reverse operation mode during operation. Refer to the theory of the type of rotary reducer corresponding to the instruction manual provided when the drive is purchased. The return gap can be used to judge whether the running state is normal.

2. Listen to the running sound

Normal equipment operating sounds are different from abnormal sounds. How to determine the operating status of the slewing drive can start from identifying the abnormal sounds. For abnormal noises or irregular sounds during operation, it is necessary to judge whether the reducer is in normal operation. If there are abnormal sounds, it should be repaired in time to determine the damage location and repair it.

3. Observe the operating temperature

If the slewing drive has abnormal temperature, there may be problems with overload operation or bearing wear and abnormal voltage, but these are usually not directly reflected from the operating state when the equipment is running, so we can judge by the temperature of the drive during operation. If the temperature is too high, it needs to be overhauled in time.

If all the above conditions are normal after running for more than 30 minutes, it means that the rotary reducer is in good working condition and can be used with confidence. So, the following editor introduces some common faults of rotary reducers for reference only.

Common faults and solutions of slewing drive

S Series Slewing Drive

1. The motor does not rotate: the motor does not rotate. Eliminate power failure and poor switch contact. There may be problems such as abnormal voltage, gear damage, overload operation, coil breakage, etc. You need to check the power supply, wiring, voltage, capacitor or directly contact the manufacturer for repair.

2. Abnormal heating: Abnormal heating of the drive may be caused by overload operation, abnormal voltage, bearing wear, etc. It is necessary to reduce the load and frequency of use, confirm whether the voltage is normal and perform maintenance.

3. Noise: The noise of the rotary reducer may have bearing damage, gear wear, or foreign matter jamming, and it needs to be disassembled and repaired by the manufacturer’s service personnel. Or there is lubricating oil contaminated or lack of lubricating oil, it should be supplemented or replaced in time.

4. Abnormal vibration: abnormal vibration caused by loose screws or wear of gears and bearings requires screw progress or replacement and maintenance of gear bearings.

5. Oil leakage: There are reasons such as loose screws or damage to the sealing ring, and the screws should be replaced or tightened in time.

The above are several judgment methods of Lunda editor on how to judge the running status of the slewing drive, as well as the common faults and solutions of the equipment. I hope it will be helpful to everyone. In the daily use of the reducer, you should pay attention to the running status of the equipment and find the problem in time. Repairs to prevent the deterioration of the problem from affecting production.

How to install the slewing drive? Installation method and process

The installation of the slewing drive device directly determines its fluency during the operation of the machine and the probability of failure during use. Improper installation may cause damage to it and affect its service life. Therefore, the installation is very important for the slewing drive. I don’t know how much you know about how to install the slewing drive.

Slewing drive installation tool

1. Auxiliary tools for hardware removal and installation such as wrenches, pliers, bolt tighteners, etc.;

2 Cleaners such as diesel, banana water, gasoline, etc.;

3. Scraper (used to clean up impurities on the supporting surface);

4. Feeler gauge, used for measurement in the later installation process;

HSE-2

Preparation before installation

1. Before installation, confirm whether the motor and the slewing drive are intact, and check whether the dimensions of the parts connected to the slewing drive match.

2. Screw on the screw on the dust-proof hole on the outside of the rotary drive flange, adjust the PCS system clamping ring to align the side hole with the dust-proof hole, and insert the inner hexagon to tighten. Then remove the motor shaft key.

3. Before installation, wipe the motor input shaft, positioning boss and the anti-rust oil at the connection part of the reducer with gasoline or zinc-sodium water.

4. Clean the impurities on the support surface (for example, iron filings, burrs, paint, welding slag, etc.).

5. Clean the anti-rust oil on the mounting surface of the rotary reducer.

6. Remove the transportation bolts.

Installation method

1. Fix the rotary reducer on the bracket with bolts, and install flat washers and spring washers on the bolt heads. The rotary reducer should be installed without load.

2. In order to avoid internal stress and installation problems caused by tightening the bolts, please add thread fastening glue to the threads; pre-tightened bolts and washers should be tightened crosswise; starting from the inner or outer ring, all bolts will be diagonal Tighten to 30% of the tightening torque, then tighten the diagonal to the tightening torque of the angle of 30%, and then tighten the diagonal to the mounting bolt, and do not leak. If the bolts cannot be fixed with bolts under structural constraints, the bolt holes must be sealed.

3. If filled with silica gel, it will leak water and dust into the rotary reducer. The installation bolts should consider the thread engagement length, which should not be too long, otherwise it will affect the rotation. Support rotation or cause interference; after tightening the bolt, mark the bolt head and its joint to facilitate future inspection of whether the bolt is loose.

SE Series Slewing Drive

The specific installation process

1. Clean the mounting bracket, remove welding slag, zinc plating residue, etc.;

2. Fix the bracket and the rotary reducer with bolts, and the bolt heads should be equipped with flat washers and spring washers;

3. The rotary reducer should be installed under no load.

4. Add thread fastening glue to the thread;

5. The pre-tightened bolts and washers should be tightened crosswise; the bolt tightening sequence is shown in the figure below; starting from the inner ring or outer ring, all bolts are tightened diagonally to 30% tightening torque, and then repeated diagonally to 50 % Tightening torque, tighten diagonally to 100% tightening torque.

6. The installation bolts are all on top, and no missing installation is allowed. If the bolts cannot be installed due to structural restrictions, the bolt holes must be sealed, such as filled with silica gel, otherwise water and dust will leak into the rotary reducer;

7. The thread engagement length should be considered for the installation bolts, and should not be too long, otherwise it will affect the rotation of the slewing ring or cause interference;

8. After the bolts are tightened, please mark the bolt heads and the joints, which is convenient for checking whether the bolts are loose in the future;

9. Repainting: During the installation of the rotary reducer, it will inevitably cause surface paint bumps and damage. Therefore, after the system is assembled, the rotary reducer needs to be repainted to improve the anti-rust and anti-corrosion capabilities.

After reading the installation method of the slewing drive and the specific installation process, everyone should have a certain understanding of how to install the slewing drive, so let’s take a look at some of the work after the slewing drive is installed.

Maintenance, inspection and lubrication after installation

1. Maintenance and inspection

After the initial assembly is used for about 100 hours, it is necessary to re-tighten the bolts to the specified tightening torque; this inspection needs to be carried out once a year. Under special operating conditions, the number of inspections is relatively reduced. After the bolts are loosened, please replace all bolts, nuts and washers immediately.

2. Lubrication

Lubrication of rotary reducer: The important parts of the product have been lubricated before leaving the factory. We will decide whether to add lubricating ester according to the actual situation during installation. The slewing ring raceway has been filled with grease before leaving the factory; the worm and the slewing ring need to be refilled with grease before use; the tapered roller bearing has been filled with grease before leaving the factory.

HSE Slewing Drive Gearbox

Installation precautions

1. Installation plane

The surface on which the rotary drive is installed should be kept smooth and clean, and the excess materials on it, such as paint residue, welding beads, burrs, etc., should be cleaned. At the same time, the installation surface should be dry and free of lubricant. Specifically, it is necessary to keep the mounting surface roughness of the mounting support not greater than Ra=12.5, 6.3μm. In order to avoid the unevenness of the mounting surface or the deformation of the support causing local overload of the rotary drive, the circumferential flatness error is within any range of 180 degrees. There can only be one wave ups and downs inside, and the changes are gentle.

2. The stiffness of the support

Standard slewing drive and zero-clearance slewing drive have different requirements for the rigidity of the support. Therefore, during installation, a support with corresponding rigidity should be selected according to the specific rotary drive.

3. Positioning

Both the inner and outer ring raceways of the slewing drive have a soft belt, which should be placed on both sides of the main load plane. That is 90 degrees staggered from the main load zone. There is a blockage or “S” mark on the soft belt. In addition, check the fit between the rotary drive and the mounting surface, usually with a feeler gauge. If the fit is not good, fill it with appropriate materials. It is forbidden to weld on the support after the rotary drive is installed.

4. Fastening bolts

Use the specified bolts, and do not use full-threaded bolts, do not use old bolts, nuts and washers, and prohibit the use of open washers such as elastic washers.

After reading this article, I believe that everyone has a certain understanding of how to install the rotary drive. During the installation process, the installation process and precautions must be strictly followed. At the same time, do not forget to check after the installation is completed.

What is the installation process of spur gear drive?

Slewing drive is divided into spur gear slewing drive and worm gear slewing drive. Spur gear slewing drive is also called spur gear drive, gear slewing drive, and gear slewing reducer. Its main applications include solar and wind power generation equipment, robots, radar, low-speed heavy-duty lifting, lifting equipment, precision CNC turntables and other products.

Application principle of spur gear drive

Spur gear drive is a full-circle reduction transmission mechanism that inherits the driving power source. Its working principle is to use all levels of gear transmission to achieve the purpose of speed reduction. The spur gear slewing drive uses a slewing ring as a drive follower and a mechanism attachment. By attaching a driving part and a driving source to one of the inner and outer rings of the slewing ring And the cover, and the other ring is used as the driving follower and the connecting base of the driven working part. In this way, the slewing bearing itself is a full-circle slewing connector, and the driving power source and main transmission parts are configured. Rotary drive is such a general-purpose reduction transmission mechanism that integrates the functions of rotation, speed reduction and driving.

Installation method of spur gear drive

1. Open the package of the slewing drive, check the certificate and label, and confirm that the type of slewing drive used is correct.

2. Make sure to install under no-load conditions, and level the installation position after keeping the surface of the equipment clean.

3. After leveling, install the rotary drive on the equipment support using a wrench, and level the equipment again. The circumferential flatness error can only have one wave ups and downs within any range of 180 degrees, and the change is gentle.

4. Position the equipment and place the soft belts on the inner and outer ring raceways of the slewing drive on both sides of the main load plane. That is 90 degrees staggered from the main load zone. There is a blockage or “S” mark on the soft belt.

5. Tighten up after positioning, use a feeler gauge to measure the fit between the rotary drive and the mounting surface. If the fit is not good, fill it with appropriate materials.

6. Adjust the gear backlash. Use a feeler gauge to measure and adjust the gear radial runout point. If the backlash is not within the specified value, move the pinion to change the center distance, and mark the gear radial runout point in the tooth groove with green paint. .

7. After installation, lubricate the supporting slewing drive, including raceways and gears. In order to ensure sufficient lubrication, the grease specified in the drawing or product instruction manual should be refilled before the first use.

Installation precautions

1. Before installation, confirm whether the motor and gear slewing drive are intact, and check whether the dimensions of the parts connected to the slewing drive match.

2. Screw on the screw on the dust-proof hole on the outside of the rotary drive flange, adjust the PCS system clamping ring to align the side hole with the dust-proof hole, and insert the inner hexagon to tighten. Then remove the motor shaft key.

3. Before installation, wipe the motor input shaft, positioning boss and the anti-rust oil at the connecting part of the speed reducer with gasoline or zinc-sodium water.

4. After the rotary drive is installed, it can be turned by hand, and the application is flexible without jamming. Before starting the machine, fix the connecting screws. The no-load test run should be no less than 2 hours, and the operation should be stable, without impact, vibration, noise and oil leakage. If found, it should be eliminated in time. When using, check whether the fasteners are loose. Ensure normal operation.

5. Naturally connect the motor and the reducer. When connecting, it must be ensured that the output shaft of the reducer and the input shaft of the motor are concentric, and the outer flanges of the two are parallel, so as to extend the service life and obtain the ideal transmission efficiency and comparison. Low noise. In addition, do not hit with a hammer during installation to prevent excessive axial or radial force from damaging the bearings or gears. Be sure to tighten the mounting bolts before tightening the tightening bolts.

The above is the whole content of the spur gear drive application principle, installation method and precautions. Spur gear drives can be used in fields that require high precision such as CNC machine tools and military radars. If you have any questions during the installation or use of the spur gear drive, please call for consultation or leave a message.