Q:What are the five failure modes of gear wheel drive?

The most important part of gear is the gear tooth. There are four main forms of its failure: tooth break, tooth surface wear, tooth surface pitting and scuffing of tooth surface1. broken teethBecause the stress on the tooth root is the greatest, and there is stress concentration, therefore, the fracture of the gear tooth usually occurs at the root of the toothIf the tooth unilateral work, root bending stress is tensile, the other side is compressed, the tooth is disengaged, the bending stress is zero. Therefore, in the repeated load, the bending stress exceeds the bending endurance limit, the root part will cause fatigue cracks. The crack gradually expand, will eventually cause the broken broken teeth, known as fatigue fracture.The sudden fracture of the gear due to short time overload or impact overload is called overload breaking. This kind of gear is easily broken by gears made of brittle materials such as hardened steel or cast iron

Q:What is the stress distribution in belt drive? Detailed

When working, the friction of the driving wheel belt is consistent with the direction of the belt movement, and the friction force of the driven wheel is opposite to the direction of the belt movement. Therefore, the active side (lower) is tensioned, and the tension is increased; the driven edge (upper) is relaxed, and the tension is reduced; that is, a tight edge and a loose edge are formed. It is called tight side tension, called slack side tension. If the approximate total length of the belt at work is constant, the increase in the tension at the side of the belt should be equal to the decrease in the tensile force at the side of the slack.

Q:How do you calculate the torque of the belt?The structure of the design is shown in the figure,

The shaft is a steel shaft with a solid diameter of 200. The outer ring is made of crimped material. The fabric density is 1.1, and the maximum crimp diameter is 1800

Q:The relation between the initial tension and the tension force, the relationship between the circumferential force and the effective tension in the belt drive

Elastic slide: belt drive at work, from the tight side to the loose side, the belt is subject to changes in tension, so the band of elastic deformation is also changing. In belt transmission, the relative motion between the belt and the pulley due to the elastic deformation of the belt is called elastic sliding. The elastic sliding results in the circumferential velocity V2 of the driven wheel, the circumference speed V1 of the driving wheel, and the degree of velocity reduction can be expressed by sliding rate epsilon

Q:What are the factors that influence the maximum effective circumferential force transmitted by a single V belt in belt transmission?

First of all, we should know that belt drive is a kind of flexible transmission. It is a kind of transmission that uses the friction or meshing between pulleys and belts to transfer the motion.

Q:How to change the belt of washing machine

When installing the first belt is sleeved on the motor pulley, the belt guide to the big belt wheel, because the tension of the belt, the belt will leak in the large pulley outside, this time the word screwdriver inserted into the belt buckle is not part of the large pulley belt will be changed.Caution!

Q:I answer, is always jumping with a triangular CVT wheel and engine of the key, I see some triangle turn like, how do I like, freely flowing style of writing, tune ah, or what is bad?

This is normal, this does not use for a period of time to back this way, V-belt loose,

Q:What is the relationship between the elastic slip of belt drive and the effective tension at the initial tension of the belt?

If the work load is increased further, the effective circle reaches the critical value Fec, then the belt and pulley will slide relatively significant, which is slipping. Slip will aggravate the wear of the belt, and the speed of the driven wheel will decrease sharply and the belt drive will fail. This situation should be avoided.2. the relationship between the initial tension and the effective working tension

Q:What are the belt drive types and features?

Multi wedge belt drive: it has the advantages of flat belt and V belt. It has good flexibility and large friction force. It is suitable for transferring power with big structure and compact structure.Synchronous belt drive: he is meshing drive, high speed, high precision, suitable for high-precision instrument device.The characteristics of belt transmission: has the advantages of simple structure, convenient use and maintenance; overload, belt on the belt wheel slip, to avoid damage to other parts, overload protection function; stable operation low noise, small vibration; manufacture and installation of high precision.Disadvantages: because the elastic and frictional force on the drive, so the existence of elastic sliding between the belt and the belt wheel, does not guarantee the accuracy of the transmission ratio; because of the existence of elastic sliding drive, part of power consumption, lower transmission efficiency; short service life; compared with the meshing transmission, tension and pressure on the shaft axis is large, easily damaged; not suitable for high temperature, flammable, explosive, oil pollution places.

Q:Do I need to add grease to the V belt or belt?

If you add lubricating oil, it is easy to slip or other accidents