Gear recombination refers to the work of recombining some new tooth shapes on top of the basic gears. The basic gear tooth profile line can be an involute or a cycloid. At least two cases are true, that is, the involute and the cycloid can be reorganized; the cycloid and the cycloid can be reorganized. Studies have shown that involutes and involutes, cycloids and involutes can also be reorganized. According to the basic law of tooth profile engagement and the principle of conjugate tooth profile, a curve that meets the requirements of the transmission has a set of curve families. However, according to the requirements of use and working conditions, as well as the principle of economical processing, there is always a set of optimal recombination profile curves when the conditions are determined.
The reorganized tooth profile group must also take into account the ease of processing, the degree of acceptance of various efficiencies, and the correct selection of processing and testing methods. The reorganized tooth profile may be symmetrical or asymmetrical; it may consist of a curve or a multi-segment curve. Both the basic gear pair and the recombined gear pair are put on the body at the same time, and the inlet and outlet ports are set at appropriate positions on both sides of the meshing point, and the recombination gear pair is loaded into the body, and the flow passage area is increased a lot.
In the basic gear pair, all the teeth have the same shape, the same size, the same effect, without any division of labor, and the various gears in the recombination gear pair have different sizes and sizes, and each tooth has a clear division of labor. Among them, the large (convex) tooth, the main function is responsible for energy conversion, the three-leaf Roots vacuum pump is also involved in transmission and sealing; the large cogging (large concave tooth) is mainly responsible for the work of accommodating large teeth, while participating in transmission and sealing; Small teeth) mainly ensure that the large-tooth dry screw vacuum pump and the large cogging can be well aligned, and participate in transmission and sealing. In this way, it is possible to expand the height of the large teeth as much as possible, reduce the height of the small teeth, expand the displacement as much as possible, and streamline the mechanism, thus creating conditions for improving the performance of the equipment.
In the closed body, the revolving gear pair divides the continuous arc-shaped chamber into two parts by the large teeth and the meshing point. If a rotation is added to them, one chamber is enlarged, and the corresponding chamber is Zooming out, this has the basic functions of suction and pumping. Since the recombination gear pair can be fully symmetrical, the eccentric mass can be completely eliminated, vibration can be reduced, and noise can be reduced.
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