Overview of harmonic reducer bearings

Harmonic reducer with cross roller bearings, according to its use occasions into outer ring split, inner ring whole (BCSF/BCSG series) and outer ring and inner ring whole (BSHF/BSHG series) two categories. The rolling body is a cylindrical roller, which is distributed at 90° and vertically arranged in a V-shaped raceway. This structure makes a single bearing can simultaneously bear axial load, radial load and overturning moment and other loads in all directions, bearing has high stiffness, rotation accuracy and composite bearing capacity; This KIND OF BEARING is compact in shape, bearing comes with mounting hole, easy for customers to install directly, suitable for different types of harmonic reducer.

Type of harmonic reducer bearing

Single row cylindrical roller bearings

Single row cylindrical roller bearings without outer ring

Double row cylindrical roller bearings without outer ring

Reducer is a kind of dynamic convey institutions, using the gear speed converter, to reduce the turnover number of power supply to the required number of rotary, and get a bigger torque, speed reducer bearing supporting rotation between the gear axis or in which the role of the connecting rod, because the cylindrical roller bearing can be obtained within the scope of the size of the effective continuous stable support the role of the moment, And it has a certain amount of axial movement. Nu NJ type cylindrical roller bearings are used to install in the supporting position at both ends of the shaft, and double-row eccentric bearings are used as the supporting position in the reducer, because it does not have different centers up and down, can get a smaller installation position to achieve small lightweight reducer products

Repair operation of bearing chamber of fishing boat reducer

The bearing chamber of 1200 HP fishing boat diesel engine reducer was worn out seriously, with the single side reaching about 6mm. It was found on site that the bearing was completely damaged, the bearing retaining ring was deformed, and the shaft end gland was damaged.
Bearing type NJ244M, the bearing inner ring can be separated.

Through field analysis, the cause of bearing position wear may be that the bearing retaining ring can not press the bearing outer ring. Measure the size of the bearing retaining ring and the gland at the shaft end and make it again.

After COMPARING and USING various processes, finally, the wear repair of the bearing chamber of the diesel engine reducer of fishing boat is effectively realized through the Solay carbon nanopolymer technology, and meets the requirements of the enterprise, which greatly reduces the maintenance cost and downtime for the enterprise.

Sauvy carbon nano polymer technology, is a technology originated in the United States, the earliest applied in aviation and military, was introduced after the start for industrial equipment, the use of carbon nano polymer unique mechanical properties and the corresponding repair process online repair including roller press, roller mill, blower, hoist, motor, reducer and other large axial of wear and tear.

The repair steps of reducer bearing chamber are as follows:

1, disassemble the reducer, clean up the surface oil;

2. The worn part of bearing chamber of reducer shall be deoiling the surface with gas welding torch;
3. The polishing machine grinds out the metal primary color, and the absolute ethanol is cleaned. The surface after treatment should be clean, dry, solid and rough.
4. Harmonize Solay SD7101H material to uniform without color difference;
5. Apply SD7101H material and scrape it with a ruler along the datum level;

6, the material after curing grinding, because of the deep wear, it is difficult to form a shape, again reconcile the material, along the datum level scraping, the material after curing grinding again;

7. The bearing outer ring is coated with SD7000 release agent and dried;
8. Adjust SD7101H material, daub again, install the bearing seat, tighten, solidify the material, and complete the repair.

Application and principle of harmonic reducer drive shaft

The application and principle of the drive shaft of the harmonic reducer is similar to that of the motor, which can be directly connected to the mechanical parts.

1. Harmonic reducer drive shaft connecting device comprises a mounting seat, a connecting shaft, an elastic chuck, a drive shaft and a reducer; The mounting seat is provided with a mounting hole running through both sides of the mounting seat; The connecting shaft can be rotationally installed in the mounting hole, the connecting shaft comprises an integral axial connection of the transmission part and the connecting part, the outer end of the connecting part is concave facing a conical opening of the connecting hole; The elastic chuck is arranged in the connecting hole, the external side of the elastic chuck is provided with a conical surface with the connecting hole; The inner end of the transmission shaft can be disassembled and installed in the elastic chuck, and the outer end of the transmission shaft extends the elastic chuck; The reducer is fixed on the mounting seat and connected with the outer end of the drive shaft.
2. Harmonic reducer drive shaft connecting device between the transmission part and the installation hole is connected through the first corner contact bearing, connecting part and the installation hole is connected through the second Angle contact bearing, and the transmission part out of the installation hole.
3. The connecting part of the drive shaft connecting device of the harmonic reducer and the outer sleeve of the elastic chuck are provided with a locking nut, and the inner end of the drive shaft is locked and fixed in the elastic chuck through the locking nut.
4. Harmonic reducer drive shaft connecting device reducer is fixed on the installation base through the installation plate, the installation plate is fixed on the installation base through the first bolt, and the reducer is fixed on the installation plate through the second bolt.
5. The reducer is a harmonic reducer, which includes a body, an output plate and a generator plate. The body is fixed on the mounting plate, and the output plate is fixed together with the body. The generator plate is clamped between the body and the output plate and is fixed with the outer end of the transmission shaft.
6. Harmonic reducer drive shaft connecting device drive shaft is a hollow drive shaft, the reducer is a hollow harmonic reducer, which is connected with the drive shaft by a key free bearing.

Harmonic reducer drive shaft connecting device, including a mounting seat, connecting shaft, elastic chuck, drive shaft and reducer; The connecting shaft comprises an integral axial connection of the transmission part and the connecting part, the outer end of the connecting part is concave facing a connecting hole with a tapered opening; The elastic chuck is arranged in the connecting hole, the external side of the elastic chuck is provided with a conical surface with the connecting hole; The reducer is fixed on the mounting seat and connected with the outer end of the drive shaft. By connecting shaft includes transmission and connection, the connection of end face concave has a connection with tapered opening hole, and cooperate with the elastic clamp head outside side have cone with the connection hole to cooperate, make the change in different specifications deceleration machine, by connecting hole of the tapered opening and elastic clamp head on the surface of the outer cone to cooperate, make it can automatic calibration concentricity, greatly simplifies the process of change, The test efficiency of the reducer is improved, and the accuracy of concentricity can also be guaranteed.