What is the formula for calculating the multi-wedge belt?

　　multi-wedge beltAlso known as compound triangle wheel. As a transmission wheel, it can be attached to a plurality of triangular inclined ring wheels under a flat body, and its wedge surface is a workbench. At present, the application range of V-ribbed belts has been relatively wide, and it is more suitable for rotating conditions that require a large number of triangular wheels and the axle can be perpendicular to the ground. Next, the editor will introduce you more knowledge about the V-ribbed belt to help you better understand the equipment.

More wheels can offset the advantages of V-belt drive and flat belt drive. It has high power during transmission, stable operation, and is not easy to generate vibration. Multi-wheel drive is mainly used for some high-power, compact structure of the occasion, the transmission ratio of up to 10. Algebra up to 40 m/s. What is the rotation ratio? The transmission ratio refers to the ratio of the angular velocities of the two moving parts in the V-ribbed belt, also known as the speed ratio.

Generally speaking, the distribution of transmission ratios at all levels of a multi-stage reducer often affects the carrying capacity and service life of the equipment, and even affects the weight, volume and degree of lubrication. Therefore, when using lubricating oil, the transmission ratio will generally make the transmission bearing capacity of all levels approximately equal, so that the size and quality of the equipment are relatively small, and the circumferential speed of all levels of gears is relatively small. The oil depth difference is small. Some low-speed large gears of the V-ribbed belt will directly affect the size and quality of the equipment and reduce the transmission ratio of the low-speed stage, that is, the low-speed large gear in the present invention will be reduced, it even includes the body size and weight of the equipment, and adds some faster transmission ratios, that is, increasing the size of the large gear in the V-ribbed belt to reduce the size difference between it and the low-speed large gear, which is conducive to the simultaneous lubrication of different gears.

The pulley material of the V-ribbed belt is usually cast iron, while cast steel will be used at high speed. The multi-wedge belt has a variety of sizes of pulley rim, users can choose according to their needs. Next, Xiaobian will introduce the design and calculation of V-ribbed belt drive. The design power P0 is first determined using the formula P0 = Ka * P. Where P0 represents the power and rated power of the machine (kw);Ka is the working condition coefficient, and P is the transmission power. In order to increase the service life of the belt, the effective diameter of the small pulley should be as large as possible when conditions permit.

　　multi-wedge beltIt is an important parameter of the multi-wedge tooth pulley. It directly affects the structural stability of the transmission and the service life of the V-ribbed belt. When the transmission ratio is determined, the smaller wedge wheel can make the transmission structure compact, saving a lot of materials and manufacturing costs. When the number of wedges of the small V-ribbed belt is too small, the wedge belt will be wound on the V-ribbed belt. Due to the reduction of the number of meshing teeth, it is easy to cause the belt tooth load of the V-ribbed belt to be too large, causing the V-ribbed belt to be cut off. In addition, when the V-ribbed belt is too small, the diameter of the V-ribbed belt may decrease, and when the wedge belt enters the V-ribbed belt, the bending stress of the V-ribbed belt may become large, resulting in bending fatigue of the V-ribbed belt, thereby damaging the V-ribbed belt.

Cut three samples with a length of 250 mm from one PJ V-ribbed belt, and mark a marking line with a spacing of 100mm at the middle position of the PJ V-ribbed belt. When more than three samples cannot be taken from one PJ V-ribbed belt, samples can be cut from the same batch of PJ V-ribbed belt, but must be indicated in the report. 7.4.2 High temperature resistance test method
Place the sample at 100 ℃ ± 2 ℃ for 96 h ± 1 h and then take it out. After standing at laboratory temperature for more than 2h, bend it along a cylinder with a diameter of 20 mm at a contact angle of at least 90 °.