Rubber Couplings Select the coupling factor to consider
There are two main types of plum coupling, one is the traditional straight claw type, the other is the surface (concave) claw type zero gap coupling. The traditional straight claw-type plum couplings are not suitable for use in highly accurate servo drive applications. The zero-gap claw-type plum blender is evolved on a straight-claw type, but the difference is that it is designed for servo system applications and is often used to connect servo motors, stepper motors and ball screws. The surface is to reduce the deformation of the elastic plum spacer and to limit the effect of the centripetal force on it at high speeds. The zero-gap jaw type coupling is made up of two metal bushings (usually made of aluminum alloy, also available in stainless steel) and a plum elastomeric spacer.
Plum elastic spacers have multiple leaf branches, like a slider coupling, it is also by squeezing the plum elastic spacer and the two sides of the sleeve match, and thus to ensure its zero gap performance. Unlike the slider coupling, the plum coupler is driven by compression and the slider coupling is driven by shear. When using a zero-gap jaw type coupling, the user must be careful not to exceed the maximum capacity of the elastic element given by the manufacturer (to ensure zero clearance), otherwise the plum elastic spacer will be lost Elasticity, preloading loss, resulting in loss of zero-gap performance, but also in the event of serious problems after the user will find. Couplings Selection Guide newmaker coupling varieties, types, specifications a lot, in the correct understanding of the variety, type, specifications on the basis of their own, according to the needs of the transmission to select the coupling, first from the already developed as a standard Shaft selection, I have developed for the international and the standard of dozens of coupling, the standard coupling is the vast majority of universal coupling, each coupling has its own characteristics and the scope of the , The basic can meet the needs of a variety of conditions, under normal circumstances, designers do not need to design their own coupling, only in the existing standard coupling can not meet the needs of their own design when the coupling. Standard coupling easy to buy, the price than the design of non-standard coupling to be much cheaper. In the many standard coupling, the right choice for their own needs the best coupling, related to the mechanical product shaft drive work performance, reliability, service life, vibration, noise, energy saving, transmission efficiency, transmission accuracy, Economy and a series of problems, but also related to the quality of mechanical products. Designers in the selection of coupling should be based on the shaft from the shaft drive and the need to select the coupling, should avoid simply consider the main and driven side coupling selection coupling. First, the choice of coupling factors should be considered (a) of the mechanical characteristics of the power machine to work between the machine, through one or several different varieties of type, the size of the coupling will be the main and driven together to form a shaft Transmission system. In the mechanical transmission, the power machine is nothing more than the motor, the internal combustion engine and the gas turbine. Due to the different working principle and mechanism of the power machine, the mechanical characteristics of the machine are quite different, and some of the operation is stable, and some have the impact of running, the influence of the transmission system is different. According to the mechanical characteristics of the power machine, the power machine is divided into four categories. 1.6 The mechanical characteristics of the power machine have a certain impact on the entire transmission system, different types of power machine, due to its different mechanical properties, should select the corresponding power coefficient Kw, select the best coupling for the system. The type of power machine is the basic factor in selecting the variety of couplings. The power of the power machine is one of the main basis for determining the size of the coupling, which is proportional to the torque of the coupling. Fixed mechanical products in the power transmission system are mostly motor, running mechanical products transmission system (such as ships, all kinds of vehicles, etc.) in the power engine for the internal combustion engine, when the power machine for the cylinder number of different internal combustion engine, you must consider the torsional vibration Transmission system, the impact of such factors and the number of internal combustion engine, the cylinder is related to the normal work. At this time should generally use the elastic coupling to adjust the natural frequency of the shaft to reduce the torsional vibration amplitude, thereby damping, cushioning, protection of transmission parts to improve the performance and improve the stability of the output power. (B) the load category due to the different structure and materials, for each mechanical product transmission system of the coupling, the load capacity vary widely. The load category is mainly for the working load of the machine impact, vibration, forward and reverse, braking, frequent start and other reasons to form different types of load. In order to facilitate the selection of the calculation, the transmission system load is divided into four categories.