How to process and maintain the drum gear coupling?

Many people have heard of couplings, but they don’t know what it is. It is understood that couplings can be divided into many types. So, what are the processing methods and maintenance of drum gear couplings? The following is The editor brings content about it, hoping to make us have a harvest!

Processing method and maintenance of drum gear coupling

XNUMX. Outstanding smoothness is a necessary guarantee for the safe and reliable operation of the Peng-shaped gear coupling, and it also reduces wear.

8. Under the condition that the tortuous strength of the tooth root and the light touch of the tooth surface are satisfied, the tooth width should be determined with a larger degree of coincidence, and the structural dimension should not be added unnecessarily.The general tooth width factor is 14-XNUMX.The minimum tooth width should be determined by the agreed tooth root stress, and the width required for the displacement of the force point along the tooth width caused by the inclination between the shafts should also be considered.

XNUMX. An important way to improve the service life of the Peng-shaped gear coupling.The tooth width coefficient affects the tooth root bending strength and the tooth surface touch strength of the tooth. The greater the tooth width coefficient, the greater the strength of these two items. The tooth width coefficient affects the degree of coincidence. When the tooth width coefficient is less than a certain value, its value The increase of φ has a greater influence on the increase of coincidence degree, and when it is at this certain value, the increase of its value has a smaller effect on the increase of coincidence degree. Regarding the Peng-shaped gear coupling of the arc crown curve, the tooth width is still It is concluded that the bulge circle radius is also the parameter of the backlash. The larger the tooth width, the larger the bulge circle radius and the greater the backlash required. Therefore, the following highlights are required:

Fourth, the smaller the gear tooth's collective load, the better, and the curvature of the tooth surface is proportional to the circumference of the drum, so the drum radius is as large as possible.The radius of curvature of the bulge curve is proportional to the single-sided thinning of the internal teeth, so the bulge circle radius should be as large as possible.The radius of curvature of the bulge curve is proportional to the single-sided thinning of the internal tooth, that is, it is related to the meshing gap of the tooth. The lack of thinning may constitute an interference, and the excessive thinning will weaken the strength of the tooth, and the backlash will be very large. Big.

XNUMX. The drum-shaped tooth surface of the drum-shaped gear coupling improves the touch conditions of the inner and outer teeth, avoiding the kneading of the edge of the straight tooth under the condition of angular displacement, and the disadvantages of stress concentration. Tooth surface conflicts and wear conditions reduce noise and have a long repair cycle.The tooth end of the outer gear sleeve is in the shape of a horn, which makes the assembly and disassembly of the inner and outer gears very convenient.

There are generally two methods for the processing of drum gear couplings, namely, the processing method and the envelope processing method:

Become a processing method-the gear machine processes the drum teeth. In addition to the reversal movement, the gear blank is also related to the tool's travel and retreat movement (use the work table to make the travel and retreat movement related to the tool to reach), hob Straight feed, this method used to process drum-shaped teeth in China.

Envelope processing method-the gear machine processes the drum-shaped teeth, the tooth blank only makes a reverse movement, and the hob center makes a circular motion to complete the straight and horizontal feed to the tooth blank. The gear hobbing machine processes the drum-shaped teeth by the way. This method is used when the knife feeds the organization, and this method is more commonly used now.

Correct smoothing process of drum gear coupling

Drum-type gear couplings receive large torque and alternating loads during operation. The main damage methods are the wear of the cross shaft journal and needle roller bearing, and the pressure on the working surface of the cross shaft journal and needle bearing bowl. Marks and shedding.

Drum-type gear couplings receive large torque and alternating loads during operation. The main damage methods are the wear of the cross shaft journal and needle roller bearing, and the pressure on the working surface of the cross shaft journal and needle bearing bowl. Marks and shedding.

In the vehicle protection standards, the rules: sliding fork teeth and center bearings use calcium-based smooth grease (butter); cross shaft needle roller bearings and three-axle drive cars use gear oil.However, in practice, because the grease nipple of the cross shaft is the same as the grease nipple, sometimes it is for convenience of operation and sometimes there is no filling equipment. Many drivers and maintenance personnel mistakenly dare to use butter to smooth the needle roller of the cross shaft. Formed early damage to the cross shaft.

XNUMX. Why can't adding butter have a smooth effect?

XNUMX. Calcium-based smoothing grease is composed of thickening agent calcium and root smoothing oil, and its structure is relatively loose.If the car continues to work under heavy load for a long time, most of the underlying smooth oil in the oil film will be separated, and the oil film will basically not exist.Moreover, the fluidity of butter at room temperature is very poor, and the needle roller can only be rolled in place during operation.Therefore, when the original oil film fails, it is difficult to form a new oil film immediately, resulting in a semi-dry conflict or a dry conflict between the needle roller bearing and the cross shaft.

2. The smooth grease becomes harder after transpiration. Not only can it not provide a smoothing effect, but it also prevents the rolling needle from rolling. In addition, there is no oil drainage device in the joint, so the degraded smooth grease cannot be discharged. New lubricating grease is inconvenient to inject.During maintenance operations, the injected lubricating grease cannot enter the center of the plastic needle, but is squeezed out from the valve. The lubricating grease in the bearing is basically still injected, and it has become a metamorphic soap, so the bearing is still not available. Outstanding smoothness.

3. Because the toughness of the butter oil film is poor, while the universal joint has to accept greater torque and alternating loads during operation, it is difficult to form an outstanding oil film in the bearing.

Therefore, grease should not be used for the smoothness of the cross shaft universal joint, but gear oil should be added.

The content of the coupling was introduced above. After reading it, we should have a certain understanding of it. Interested friends can also learn more about other couplings we have collected.