Abstract
Methods used earlier for choosing profile shift coefficients were based on presumed advantages without physical proof justifying them. In this paper, a new method is proposed which guarantees a positive influence on gear failures and the operational conditions of gear pairs. The author proposes the introduction of a new concept: the cumulative effectiveness of profile shift coefficients.
Highlights
In the case of the use of spur gears, the required movement ratio must be carried out so that the structural elements are able to transmit the loads occurring without damage
We examine what kind of positive effect we have on the operation of the spur gear pair by fulfilling a particular criterion
The methods presented above look for the answer to how the sum of the profile shift coefficients Σx, which can be calculated by the sum of the number of teeth Σz and the working pressure angle αwt, should be divided between the two gears in meshing
Summary
In the case of the use of spur gears, the required movement ratio must be carried out so that the structural elements are able to transmit the loads occurring without damage. Knowing the sum of profile shift coefficients, it is customary to use several principles to calculate the profile shift coefficients of the gears in meshing; e.g., based on the equalization of the specific sliding values at the endpoints of the path of contact, or on the same characteristic points, on the basis of equalizing the value of the flash temperatures, etc. The methods presented above look for the answer to how the sum of the profile shift coefficients Σx, which can be calculated by the sum of the number of teeth Σz and the working pressure angle αwt, should be divided between the two gears in meshing This is not a problem for the u = 1 gear ratio, while x1 = x2 = 0.5 × Σx because of z1 = z2. Depending on the operating conditions (load, circumferential speed, temperature, vibrations, dynamic effects, etc.), the cause of the failure in the case under investigation is the most dangerous for the smooth operation of the gear unit
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
