Rational axial shift of gear cutter

2009 ◽  
Vol 29 (9) ◽  
pp. 936-939 ◽  
Author(s):  
V. V. Demidov ◽  
V. P. Tabakov
Keyword(s):  
Gear Cutter ◽  
Axial Shift

Design and Dynamic Analysis of an Innovative Axial Shift Valvetrain System (ASVS) for Variable Stroke Engine

2021 ◽  
pp. 146808742110653
Author(s):  
Jingchen Cui ◽  
Liping Chen ◽  
Wuqiang Long ◽  
Xiangyu Meng ◽  
Bo Li ◽  
...  
Keyword(s):  
Contact Force ◽  
Engine Speed ◽  
Exhaust Valve ◽  
Valve Lift ◽  
Intake Valve ◽  
Power Performance ◽  
Working Cycle ◽  
Valve Motion ◽  
Axial Shift ◽  
Stroke Engine

A variable valvetrain system is the key part of the variable stroke engine (VSE), which could achieve higher power performance and low-speed torque. An innovative axial shift valvetrain system (ASVS) was put forward to meet the air-charging requirements of a 2/4-stroke engine and complete a changeover within one working cycle. Two sets of intake and exhaust cam profiles for both intake and exhaust sides in the 2/4-stoke mode were designed for 2/4-stoke modes. Furthermore, a simulation model based on ADAMS was established to evaluate the dynamic valve motion and the contact force at different engine speeds. The dynamic simulation results show that the valve motion characteristics meet the challenges at the target engine speed of 3000 r/min. In two-stroke mode, the maximum intake valve lift could achieve 7.3 mm within 78°CaA, and the maximum exhaust valve lift could achieve 7.5 within 82°CaA on the exhaust side. In four-stroke mode, the maximum intake valve lift can achieve 8.8 mm within 140°CaA, and the maximum exhaust valve lift can achieve 8.4 mm within 140°CaA. The valve seating speeds are less than 0.3 m/s in both modes, and the fullness coefficients are more than 0.5 and 0.6 in the 2-stroke and 4-stroke mode, respectively. At the engine speed of 3000 r/min, the contact force on each component is acceptable, and the stress between cam and roller can meet the material requirement.

Axial Shift

2019 ◽  
Author(s):  
Benjamen Gussen
Keyword(s):  
Axial Shift

Solutions for Increasing the Bearing Capacity of Thrust Bearings

2014 ◽  
Vol 630 ◽  
pp. 208-219 ◽  
Author(s):  
Vasyl Martsynkovskyy ◽  
Volodymyr Yurko
Keyword(s):  
Bearing Capacity ◽  
Oil Consumption ◽  
Thrust Bearings ◽  
Consumption Ratio ◽  
Operating Modes ◽  
Axial Forces ◽  
High Efficient ◽  
Petroleum Chemical ◽  
Axial Shift ◽  
Rotor Balancing

Design faults, imperfect manufacturing processes, change of technological operating modes of the turbocompressors in gas, petroleum, chemical and petrochemical industry cause axial rotor shifts. Therefore, the task of manufacturing the high-efficient and reliable thrust bearings is important nowadays along with effective rotor balancing, methods of axial forces calculation considering possible operating modes, improvement of static electricity elimination system, protective and monitoring systems of the axial shift. Effective methods for increasing the bearing capacity of thrust bearings, applied by TRIZ Ltd, have been studied in the report. The accepted and realized on the operating equipment solutions have enabled to increase the bearing capacity of thrust bearings significantly and to reduce oil consumption ratio, keeping down location dimensions to the equipment.

REDUCTION OF ERRORS IN THE PROFILE OF THE TEETH OF GEARS IN THE PROCESSES OF GEAR MILLING WITH WORM CUTTERS

2021 ◽  
Vol 3 ◽  
pp. 63-72
Author(s):  
D.T. SAFAROV ◽  
A.G. KONDRASHOV
Keyword(s):  
Worm Gear ◽  
Profile Error ◽  
Limit Values ◽  
Gear Cutter ◽  
Technological Structure ◽  
Expert Analysis ◽  
Corrective Actions ◽  
Longitudinal Profiles ◽  
Profile Errors

The article considers an approach to reducing the errors of the involute and longitudinal profiles of gears. The reduction of the profile error consists of several steps – evaluation of indicators relative to the limit values, identification of the technological structure, expert analysis of profilograms, which results in the content of corrective actions. Constant repetition of steps leads to a constant reduction of the most significant profile errors, which significantly reduces the risks of manufacturing wheels with inappropriate profile errors. The scheme is universal and can be used for any tooth processing operations. The article deals with the reduction of the error of profiles on the example of gear milling of cylindrical skew–toothed wheels with a worm gear cutter.

Research on Gear Cutter Tooth Profile for Semi-Topping: A Case of a Helical Gear

1992 ◽  
Author(s):  
Y. Ariga ◽  
Shiyeyoshi Nagata
Keyword(s):  
Design Method ◽  
Gear Tooth ◽  
Helical Gear ◽  
Tooth Profile ◽  
Tooth Surface ◽  
Gear Cutting ◽  
Gear Cutter ◽  
Conventional Design ◽  
Wide Range ◽  
Tooth Number

Abstract Gear tooth tips are frequently chamfered to prevent nicks or scuffing on the tooth surface. Some of the hob cutters and pinion cutters can be chamfered but many types of cutters should be used for a particular range of tooth numbers since the amount chamfering largely varies depending on the tooth number. However, intensive efforts in the design have made it possible to produce cutters with little variation of chamfering amount for a wide range of tooth numbers. The error in the amount of chamfering by a single cutter designed by the above method can be maintained within ±10 % for gears with tooth numbers ranging from 16 to 94. It was found that three cutters of the conventional design are required for keeping the error within the same range for cutting gears within a given range of tooth numbers. The paper describes the tooth design method of the hob cutter with little variation of chamfering amount along changes in number of teeth to be machined and demonstrates that chamfering errors are maintained within practically allowable ranges for profile shift cutting or helical gear cutting with the use of this cutter.

Structure of the library of parametric gear-cutter models in the KOMPAS system

2014 ◽  
Vol 34 (11) ◽  
pp. 701-704 ◽  
Author(s):  
A. V. Shchekin ◽  
E. V. Mitin ◽  
S. P. Sul’din
Keyword(s):  
Gear Cutter

Extracting Load Research of Taper Interference Fit Made of Glass and Ceramics Parts Using a Servo Press

2015 ◽  
Vol 816 ◽  
pp. 461-468 ◽  
Author(s):  
Pavel Lekomtsev ◽  
Pavol Božek ◽  
Alexander Romanov ◽  
Andrey Abramov ◽  
Ivan Abramov ◽  
...  
Keyword(s):  
Carrying Capacity ◽  
Axial Loading ◽  
Thermal Method ◽  
Load Carrying Capacity ◽  
Test Results ◽  
Interference Fit ◽  
Servo Press ◽  
Load Carrying ◽  
Technical Ceramics ◽  
Axial Shift

Test results of axial shift of “technical ceramics - glass” parts in taper interference fit joint under axial loading are presented. The load-carrying capacity was tested under normal conditions; a servo press was used to load the test samples. The tested samples were assembled by thermal method.

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