ALLOWANCE VALUES FOR CONTINUOUS ROLLING GEAR GRINDING OF CYLINDRICAL WHEELS

2020 ◽  
pp. 12-17
Author(s):  
A. S. Kalashnikov ◽  
Yu. A. Morgunov ◽  
P. A. Kalashnikov ◽  
A. G. Karavanova
Keyword(s):  
Analytical Method ◽  
Error Compensation ◽  
Automatic Transmission ◽  
Experimental Studies ◽  
Planetary Gear ◽  
Continuous Rolling ◽  
Cylindrical Gears ◽  
Minimum Value ◽  
Gear Grinding ◽  
Optimal Values

Designed and experimentally investigated the analytical method of determining the minimum value of the allowances at the side surfaces of the teeth of cylindrical gears taking into account the errors in the gear obtained in the preceding operation, and error compensation from the operation performed. For practical confirmation of the accuracy of the method of determining the allowance, an experimental gear grinding of a batch of satellites of the planetary gear of the cars automatic transmission was carried out. Based on the results of theoretical and experimental studies, recommendations were developed to determine the optimal values of allowances for the operation of grinding teeth.

Balancing of High Speed Machinery

1967 ◽  
Vol 89 (1) ◽  
pp. 111-117 ◽  
Author(s):  
Chi-Yeh Han
Keyword(s):  
Phase Angle ◽  
Analytical Method ◽  
Digital Computer ◽  
High Speed ◽  
Mechanical Systems ◽  
Constant Speed ◽  
Mass Moment ◽  
Balance Weight ◽  
Optimal Values ◽  
Complete Revolution

An analytical method for optimal balancing of the shaking forces and the shaking moments of force of any plane mechanism driven by a constant speed shaft is developed. The optimal values of phase angle and mass moment of the balance weight on the driving shaft are ascertained, such that the variation of load on the machine supports due to shaking forces and shaking moments of force will be a mininum through a complete revolution of the driving shaft. Using a digital computer, this method is applicable to complicated mechanical systems; an illustrative example follows the analysis.

ANALYTICAL METHOD FOR DETERMINING THE THICKNESS OF DEPOSITS ON THE INTERNAL SURFACES OF HEAT EXCHANGERS

2019 ◽  
Vol 9 (1) ◽  
pp. 20-24
Author(s):  
Olga Yu. KURGANOVA ◽  
Igor V. KUDINOV ◽  
Ruslan M. KLEBLEEV ◽  
Ekaterina V. STEFANYUK ◽  
Tatiana E. GAVRILOVA
Keyword(s):  
Analytical Solution ◽  
Outer Surface ◽  
Analytical Method ◽  
Exact Analytical Solution ◽  
Large Diameter ◽  
Experimental Studies ◽  
Sediment Layer ◽  
Internal Surfaces ◽  
Pipeline Wall

Using the exact analytical solution of the stationary thermal conductivity problem for a two layer flat wall under inhomogeneous boundary conditions of the first and third kind, an analytical method for thickness determination of the sediment layer on the inner surface of the pipeline wall by the temperature known from the experiment on its outer surface is developed. The thickness of the deposits is found from the solution of the inverse problem by substituting the experimental value of the temperature of the outer surface of the wall into the formula of an accurate analytical solution. According to the results of theoretical studies, the thickness of the deposits was equal to 1.3 cm. Due to the large diameter of the pipeline (0.6 m) and the insignificant thickness of the two layer wall (0.016 m), it was assumed to be flat. The thickness of the deposits according to experimental studies was equal to 1.1 cm. Therefore, the discrepancy between the results of theoretical and experimental studies is 15.3%. The sequence of obtaining a solution to a similar problem for a cylindrical wall is also presented.

A Finite Element Method for the Dynamic Analysis of Automatic Transmission Gear Shifting with a Four-Degree-of-Freedom Planetary Gearset Element

2003 ◽  
Vol 217 (6) ◽  
pp. 461-473 ◽  
Author(s):  
N Zhang ◽  
A Crowther ◽  
D K Liu ◽  
J Jeyakumaran
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Automatic Transmission ◽  
Free Vibration Analysis ◽  
Planetary Gear ◽  
Rigid Body Dynamics ◽  
Degree Of Freedom ◽  
Parametric Change ◽  
Stiffness And Damping ◽  
Element Method

A dynamic model of a passenger car automatic transmission and driveline is developed for simulating transient torsional vibration in gearshifts. A finite element method is proposed for presenting the transient dynamics of the parametric system, element matrices are defined and then global inertial, stiffness and damping matrices are formulated corresponding to the defined global coordinate vectors. A four-degree-of-freedom matrix element is developed that describes the rigid body dynamics of the planetary gear set and is then integrated with the driveline system; this element captures the parametric change while the transmission speed ratios vary over gearshifts. Free vibration analysis and a transient 2-3 upshift simulation are discussed and results presented.

A Research for the Planetary Gear Noise Development in FF 6th Speed Automatic Transmission

2011 ◽  
Author(s):  
Hyun-Ku Lee ◽  
Koo-Tae Kang ◽  
Moo-Suk Kim ◽  
Jin-Wook Hur
Keyword(s):  
Gear Tooth ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
The Sun ◽  
Noise Levels ◽  
Noise Sources ◽  
Valve Body ◽  
Gear Noise ◽  
Radiated Noise ◽  
Transfer Path

In order to improve the planetary gear noise of the new developed 6th speed automatic transmission, it needs to understand noise mechanism. Basically, many transmission’s components have an effect on the gear noise. In this paper, planetary gear noise sources which are influenced by gear tooth shapes and backlash among the gears, position of pinion gears, and misalignment of the sun gear are studied and experimented. Also, transfer-path likewise one-way clutch contacted between the carrier and case, and valve-body covers are also researched to reduce the transferred vibration and radiated noise levels. After developing the planetary gear noise, its evaluation specification is adapted to EOL (end of line) equipment to check the transmission’s noise quality in the factory.

Planetary Gear Fatigue Behavior in Automatic Transmission

2006 ◽  
Author(s):  
Tze-Chi Jao ◽  
Timothy Henly ◽  
Gerald W. Carlson ◽  
Chintan Ved ◽  
Roscoe O. Carter ◽  
...  
Keyword(s):  
Fatigue Behavior ◽  
Automatic Transmission ◽  
Planetary Gear

scholarly journals Advanced Power Transmission System

2012 ◽  
Vol 23 (2) ◽  
pp. 191-207
Author(s):  
Rafea M. Abd El-Maksoud Rafea M. Abd El-Maksoud
Keyword(s):  
High Performance ◽  
Power Transmission ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
Torque Converter ◽  
Transmission System ◽  
Present System ◽  
Power Splitting ◽  
Operating Modes ◽  
Power Transmission System

Different researches are adopted to modify and enhance automatic transmission by every means. Whereas, torque converter that represents the most important component in such transmission suffers from some problems that are not completely solved. In this paper, power transmission system is herein introduced as a unique power transmission system that is not affected by torque converter problems. This power transmission operates with power splitting concept and is composed of conventional torque converter connected to planetary sets. Three clutches are used to shift the operating modes and unique positive displacement hydraulic couplings are utilized to regulate performance in power paths. Also, a modified model used to predict torque converter performance is utilized with planetary gear kinetics to assess the transmission performance. Moreover, the present system operates with high performance. Unlike the automatic transmission that operates in line, the present system operates with infinity number of operational bands for each engine speed.

Effect of Internal Gear Flexibility on the Quasi-Static Behavior of a Planetary Gear Set

2000 ◽  
Author(s):  
Ahmet Kahraman ◽  
Sandeep Vijayakar
Keyword(s):  
Contact Mechanics ◽  
State Of The Art ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
Load Sharing ◽  
Static Behavior ◽  
Nonlinear Contact ◽  
Bending Stresses ◽  
Deformable Bodies ◽  
Internal Gear

Abstract Effect of flexibility of an internal gear on the quasi-static behavior of a planetary gear set is investigated. A state-of-the-art FEM/semi-analytical nonlinear contact mechanics formulation is employed to model a typical automotive automatic transmission planetary unit. The model considers each gear as deformable bodies, and meshes them to predict loads, stresses and deformations of the gears. Actual support and spline conditions are included in the model. The rim thickness of the internal gear is varied relative to the tooth height and gear deflections and bending stresses are quantified as a function of rim thickness. Influence of rim thickness on the load sharing amongst the planets is also investigated with and without floating sun gear condition. The results are discussed in detail and guidelines regarding the design of a planetary internal gear are presented.

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