We all know that the large inclination belt conveyor
is composed of several parts: the drive device, tensioning device and reverting device. Through these parts of the close cooperation, in order to make large inclination belt conveyor better and more efficient work. Xiaobian to the following specifically to explain the role of these parts:
1. Drive device: The large inclination belt conveyor is composed of electric motor, coupling or hydraulic coupling, reducer, drive roller and so on. The large inclination belt conveyor with inclined section should also be equipped with brake or backstop The
The driving device is used by the drive roller through the friction to the traction force to the conveyor belt to move and transport the goods. Most large inclination belt conveyors are driven by single drums, but as the volume and distance increase, the traction force transmitted by the drive drum is increased accordingly, resulting in a double drum and multi-drum drive. Each drive roller can be equipped with one or two drive units, and the end of the drive roller shaft is connected to the drive unit by coupling.
Driving motor is generally used Y series cage motor, it has a small size, low cost, reliable work, and easy to achieve automatic control. When the power is small (¡Ü 37kW), it can be driven directly through the elastic coupling. When the power is large (45-315kW), it can be equipped with a hydraulic coupling to make the starting smooth. In the case of a large power (220-800kW), a winding motor can be used, which facilitates the regulation and control of the long-distance large inclination belt conveyor to solve the problem of multi-drum drive power balance.
Modern large large inclination belt conveyor reducer in addition to the use of cylindrical gear drive outside. In order to reduce the lateral size of the conveyor drive, also often use bevel gear reducer.
For mobile large inclination belt conveyors, in order to reduce the weight, the transmission device with a belt, chain or an open gear drive. In addition can also be used cycloid reducer or the use of electric drum.
Electric drum is the motor and the reduction device on the drive roller, which is compact, light weight, easy to arrange, safe operation, suitable for humid environment, corrosive conditions. The disadvantage is that the motor cooling conditions are not good. Maintenance inconvenience.
The drive drum transmits the traction force by the friction between its surface and the conveyor belt. Transmission roller with smooth and plastic two, plastic surface and plastic surface, the word pattern of plastic (for one-way operation), diamond-shaped plastic surface (suitable for two-way operation) and so on. The use of plastic surface, especially the pattern of plastic surface can increase the friction coefficient, pattern glue to prevent the conveyor belt deviation also has a certain role. In the case of little power, the environment humidity is small, the use of smooth roller; when the environment is wet, power is large, easy to slip should be used plastic roller.
When the conveyor belt passes around the drum, bending may cause fatigue damage. So the diameter of the drive roller can not be too small. Transmission drum diameter specifications are 500,630,800,1000 mm, etc., can be selected by bandwidth.
2. Tensioning device: The function of the tensioning device is to maintain the necessary initial tension of the conveyor belt, so as not to slip on the drive roller, and to ensure that the two rollers between the conveyor belt sag in the specified range. Tensioning devices are mainly screw, car heavy hammer and vertical heavy hammer and so on.
The screw tensioner uses a human rotating screw to adjust the tension of the conveyor belt. Its structure is simple and compact, but the tension is not easy to grasp the size of the work process, the tension can not be kept constant. Generally used in the length of less than 100m, less power on the conveyor, according to the length of 1% -1.5% selected tension stroke. Trolley heavy hammer tension device size, covers an area, large quality, suitable for long, high power conveyor, especially in the tilt conveyor.
The vertical hammer tensioner can take advantage of the space below the corridor of the conveyor and is located where the lower tapes are the least tension, thus reducing the weight of the hammer. The disadvantage is to increase the number of drums to increase the number of conveyor belt bending, and the material easily fall between the conveyor belt and roller conveyor belt.
3. Reversing device: large inclination belt conveyor adopts the reoriented roller or the changing roller group to change the movement direction of the conveyor belt.
The reversing roller can be used to change the direction of the conveyor belt 180 ¡ã, 90 ¡ã or <45 ¡ã. Generally arranged in the tail of the reversing roller or vertical heavy hammer of the tension roller to make the conveyor belt to 180 ¡ã, vertical heavy hammer tension device above the drum to 90 ¡ã, and change to 45 ¡ã below the general used to increase the conveyor belt And the angle between the drums.
Change to roll the diameter of 250,315,400,500,630,800,1000 mm and other specifications, the choice can be used with the drive roller diameter match. When it is changed to 180 ¡ã, its diameter may be smaller than the diameter of the drive drum. When it is changed to 90 ¡ã or 45 ¡ã, it can be appropriately taken with the change angle.
The changeover roller set is a number of support rollers arranged along the desired radius arc, which is used at a greater radius of curvature of the conveyor belt or in a slotted roller section so that the conveyor belt Can maintain the groove cross section. When the conveyor belt through the convex arc, due to the influence of the roller groove angle, so that both sides of the conveyor belt elongation to the center. In order to reduce the tape stress, the radius of curvature of the convex arc should be as large as possible, generally according to the fabric core elongation of 0.8%.