Calculation of bridge structural reliability
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2. Due to the thin and light belt, good flexibility and reasonable structure, the working stress is small and it can work on the smaller pulley
3. Multi wedge belt also has the characteristics of small transmission vibration, fast heat dissipation, smooth operation, small elongation, large transmission ratio and high limit linear speed, so it has longer service life
4. Obvious energy saving effect and high transmission efficiency
5. Compact transmission and small space occupation
in addition, the back of the V-belt can also be driven, and the automatic tension adjuster can be used to make the drive more safe and reliable. Multi wedge belt is especially suitable for high speed transmission with compact structure and high transmission power
What are the main transmission characteristics of multi wedge belt / wheel
1. The transmission power is large, which is 30% higher than that of ordinary V-belt when the space is the same
2. The structure of the transmission system is compact. Under the same transmission power, the space occupied by the transmission device is 25% less than that of the ordinary V-belt
3. The belt body is thin and full of softness, which is suitable for transmission with small pulley diameter and high-speed transmission. The belt speed can reach 40m / s; Small vibration, less heat, stable operation
4. Heat resistance, oil resistance, wear resistance, small elongation and long service life.
The work done by the conveyor belt is directed at the object. The work done depends on how much the kinetic energy of the object changes
the power consumed by the conveyor belt is not only the work done by the conveyor belt, but also the internal energy generated by the system, which is the sum of the two. According to the conservation of energy, the more consumed electric energy is the increased kinetic energy of the object plus the increased internal energy (friction heat) e to friction, which is easy to prove
more consumed energy = MV ＾ 2. V is the belt speed and M is the mass of the object, which is independent of the friction coefficient between the belt and the object
extended data
example:
the belt speed is 3m / s, and the center distance between two pulleys L = 4.5m. Now put a small object of 1kg on the belt directly above the left wheel. The dynamic friction coefficient between the object and the belt is μ＝ 15, when the motor drives the belt to transport the object from the left wheel to the top of the right wheel, the analysis of the electric energy consumed by the motor
acceleration of the object a = μ mg／m＝ μ g＝1．5m／s²，
When the velocity of the object reaches v = 3m / s, the acceleration time t = (V-0) / a = 2Spassing distance x = (V & # 178; - 0) / 2A = 3M, the visible object first accelerates and then moves at a constant speed
the displacement of the rear uniform motion is x '= 1.5m
According to the kinetic energy theorem,1 μ MGX = ek-0, the kinetic energy EK is obtained= μ mgx=4.5J
2. The heat generated in this process (friction heat) q = μ mg Δ x＝4．5J Δ x＝vt－at²／ 2 = 3M, the relative displacement between belt and object)
In this process, the electric energy consumed by the motor is equal to the kinetic energy obtained by the block plus the heat generated by friction, e = EK + q = 9jthe main features are as follows:
1. Large transmission power, 30% higher than that of ordinary V-belt when the space is the same
2. The structure of the transmission system is compact. Under the same transmission power, the space occupied by the transmission device is 25% less than that of the ordinary V-belt
3. The belt is thin and flexible. It can be used to drive small diameter belt pulley (smaller than traditional V-belt pulley), and can also drive multiple wheels. Suitable for high speed transmission, belt speed up to 40m / s; Small vibration, less heat, stable operation
4. Heat resistance, oil resistance, wear resistance, small elongation and long service life< The advantages of the belt are as follows:
1. The contact area and friction between the belt and the pulley are larger, and the load distribution along the belt is more uniform, so the transmission capacity is greater. 2. Because the belt is thin and light, flexible and reasonable in structure, the working stress is small, so it can work on smaller pulley
3. Multi wedge belt also has the characteristics of small transmission vibration, fast heat dissipation, smooth operation, small elongation, large transmission ratio and high limit linear speed, so it has longer service life
4. Obvious energy saving effect and high transmission efficiency; Compact transmission and small space occupation. In addition, the back of the multi wedge belt can also be driven, and the automatic tension adjuster can be used to make the transmission more safe and reliable. Multi wedge belt is especially suitable for high speed transmission with compact structure and high transmission power.