Design and Simulation of tractor gear system
In modern product design, the traditional experience design, analogy design and static design can not meet the needs of engineering, […]
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Multi scale dispersion entropy of planetary gear crack
DE is an index to measure the complexity or irregularity of time series, which has the advantages of high calculation
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The effective solution to the problem of gear broken in mining machinery
1. estimate the load bearing capacity of the mechanical gear in advance. In fact, the load bearing capacity of the
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The reason of mechanical gear breaking under eccentric load
In fact, there are many reasons leading to the problem of eccentric load and broken teeth of mechanical gears. The
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Influence of accuracy characteristics of machine tool on large gear error
From the configuration principle, the accuracy characteristics of such machine tools can be obtained: ① The tooth profile error is
Scientific
Simulation verification test of noncircular gear stepless speed regulation
1. Construction of experimental platform In order to verify the correctness of the design of non-circular gear, the differential equation
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This paper studies the causes of static broken teeth of mechanical gears
In the mining work, the actual working environment is very poor, the working equipment is not perfect, so the gear
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Analyzes the causes of fatigue fracture of mechanical gears
In fact, the so-called fatigue tooth breaking problem is that the mechanical gear breaks, and the whole spur gear will
Scientific
Simulation verification of noncircular gear stepless speed regulation
1. Modeling of non-circular gear stepless speed regulation mechanism This design mainly lies in the research of the output speed
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Parameter matching design of noncircular gear
Due to the different speed ratio characteristics of non-circular gears with different parameters, the design and processing of non-circular gears
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Optimization of machining process of mechanical gear
Although the strength of mechanical gear bearing capacity does not entirely depend on gear hardness, improving gear hardness is still
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Branch matching design of noncircular gear
From the application characteristics of the stepless speed regulating mechanism, it can be seen that the non-circular gear stepless speed
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Optimization of mechanical gear design
Because the mechanical operation is mostly heavy load, medium and low speed transmission, most of them start frequently and often
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Pitch curve design of noncircular gear pair
According to the structural relationship of the non-circular gear stepless speed regulation mechanism shown in Fig. 1, as the generation
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Material selection and processing technology of mechanical gear
1. Material selection of mechanical gears Other countries in the world mainly use Cr Ni and Cr Ni Mo carbon
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Principle of noncircular gear stepless speed regulation
As shown in Figure 1, the non-circular gear stepless speed regulation mechanism mainly includes two parts: the non-circular gear speed
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Material selection and design optimization of mechanical gear
Gear is a kind of mechanical element with continuous meshing transmission of motion and power on the rim, which plays
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Finite element analysis of noncircular gear
Due to the removal of part of the mass, especially the thinning of the tooth thickness, the load-bearing capacity of
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Effect of adjustment parameters of machine tool cutting on tooth contact of spiral bevel gear
The adjustment parameters of machine tool cutting play an important role in the tooth contact of spiral bevel gear. How
Scientific
Optimization design of noncircular gear
Let the mass of non-circular gear be m and the speed be m ω， The angular acceleration is ε， If
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Dynamic characteristics of planetary gear transmission system with sun gear failure
Planetary gear transmission system has the advantages of stable operation, high bearing capacity and high transmission ratio, so it has
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Fatigue performance of internal meshing modified gears with cracks
Gear drive is widely used in heavy industry and manufacturing industry, and is often used as reducer, speed increaser, differential,
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Force analysis of driving gear of starting motor
1. Principle of starting motor driving gear to start engine The starting motor of internal combustion engine is to convert
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Reliability optimization of transmission gears for flying vehicles
The traditional concept is that flying vehicle is a land and air amphibious vehicle with the functions of flying in
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Metallographic examination and analysis of driving gear of engine starting motor
1. Gear crack morphology After cutting, grinding and polishing, the fault gear was detected under the optical microscope. The crack
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Characteristics of noncircular gear stepless speed regulation
Since the relevant research of gear pair entered the right track in the 17th century, many scholars at home and
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Fracture analysis of driving gear of engine starting motor
The fracture of the driving gear is due to the looseness of the fastening nut of the starting motor gear,
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Fracture analysis of driving gear of engine starting motor
The starting motor drive gear material is 20CrMnTi, and the heat treatment process is normalizing quenching and tempering carburizing quenching
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Adhesion wear of involute spur gear at low speed
Adhesive wear is the most common fault type on the working surface of mechanical system, which often occurs on the
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Simulation calculation and result analysis of involute spur gear under low speed condition
1. Simulation method validation In order to verify the simulation model, the minimum oil film thickness is far less than
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Fracture analysis of driving gear of starting motor
It is concluded that the fracture of the driving gear is due to the looseness of the fastening nut of
Scientific
Wear prediction model of involute spur gear at low speed
1. Basic wear model In the meshing process of gear pair, the relative sliding and rolling occurs between the meshing
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Force analysis of driving gear of starting motor
1.Principle of starting engine with starter motor driving gear The starting motor of internal combustion engine is to convert electric
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Load distribution coefficient model of involute spur gear at low speed
When involute spur gear works, it has to go through the process of single tooth meshing and double tooth meshing
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Main influence factors of gear heat treatment deformation
In the process of gear heat treatment, due to various environmental factors and other external factors, gear deformation occurs. According
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Causes and control methods of gear heat treatment deformation
Gear is the main work piece in mechanical transmission, and it is also an important force unit. Due to the
Scientific
Measurement of tooth profile error of straight involute gear
Based on the generating principle of base circle involute, the tooth profile measurement method of involute gear is proposed °
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Kinematic geometry measurement concept of gear accuracy
Gear kinematic geometry measurement technology is a kind of technology to study and realize gear geometric error measurement from the
Scientific
Accuracy measurement of involute profile of gears
Around 1920s, people began to discuss the problem of gear accuracy measurement. In 1922, Switzerland applied for the patent of
Scientific
Vibration mechanism of planetary gearbox
Planetary gearbox is mainly composed of central shaft, planetary gear and sun gear. In the gearbox fault, the probability of
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Research on fault diagnosis of gearbox
As a device that can effectively change the speed and transfer power, gearbox is widely used in various types of
Scientific
Tooth surface detection formula of hourglass worm gear
Let the circumferential matching angle between the measuring coordinate system and the theoretical coordinate system be φ P. Then the
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Research on fatigue crack of low speed and heavy load gear
Taking low-speed and heavy-duty gear as the research object, the fatigue crack propagation and fatigue fracture of gear teeth are
Scientific
Detection principle of hourglass worm gear tooth surface
In order to obtain the actual coordinate points of the hourglass worm tooth surface, the coordinate machine or gear measuring
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Bending fatigue test of low speed and heavy load gears
Before carrying out the bending fatigue test, it is necessary to determine the stress level of the test. Two of
Scientific
Geometric model of each gear rotor
The figure shows the rotor model of a typical integral 5-stage centrifugal compressor. As shown in figure a), TST, WST,
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Fatigue crack of compact tensile specimen of 42CrMo steel low speed heavy duty gear
Fatigue cracks often occur when the component is under the condition of alternating load for a long time. The initial
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Determination of fatigue stress dangerous position of pinion
In general, the fatigue failure of gear is to produce microcracks at the position of the maximum stress of gear
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Calculation of revolution angle of noncircular gear shaper cutter
When the pitch circle of the gear shaper cutter rolls along the pitch curve of the non-circular gear, it not
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Analysis on fatigue crack propagation of low speed and heavy load gears
The fatigue crack growth mechanism of 42CrMo steel was studied by fatigue crack growth test. The law of fatigue crack
Scientific
Nephogram of contact pressure distribution and contact state of low speed and heavy load gears
Figure 1 is the contact pressure diagram of the gear in the process of meshing, and the pressure distribution of
Scientific
The condition of noncircular gear design
The diagram of stepless transmission mechanism is shown in Figure 1. The driving noncircular gears 1 and 3 are the
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Analysis of fatigue fracture morphology of low speed and heavy load gears
Fatigue fracture is the surface formed by the fatigue fracture of the test sample or component during the test or
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Variation of equivalent stress and time in meshing process of low speed and heavy load gears
The results of the overall equivalent stress of the gear are shown in Figure 1. The variation law of dynamic
Scientific
Tooth surface construction of pure rolling internal meshing line gear based on cylindrical helix
On the basis of space curve meshing theory, the tooth surface construction of parallel shaft pure rolling internal meshing line
Scientific
Fatigue fracture analysis of low speed and heavy load gears
The macro morphology of fatigue fracture of low speed and heavy load gear teeth can be divided into three obvious
Scientific
Failure analysis of forging of a fuel gear pump shell
Macro analysis It can be seen from Fig. 1 (a) that the cracks are exposed on the forging surface, the
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Research on fatigue crack growth behavior of low speed and heavy load gears at China and abroad
With the continuous improvement and innovation of fatigue crack testing methods, the research on small fatigue cracks has gradually changed
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Research on fatigue damage of low speed and heavy load gears by Chinese scholars
Wu Zhenpeng and others took the helical gear as the research object, modeled the helical gear, simulated the crack propagation
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Fatigue life prediction of low speed and heavy load gears
Since the test data under each stress level obey the lognormal distribution, when the normal probability density function is known,