Research on profile modification of multistage gears
Profile modification is to remove trace material from the tooth surface along the direction of tooth height, so as to […]
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Bending fatigue test method of low speed and heavy load gears
The bending fatigue test was designed and completed according to GB / T 14230-1993. In the bending fatigue test, according […]
Scientific
Vibration mode of multistage gear coupling system in shearer cutting section
Firstly, the natural vibration characteristics of the coupled system are solved. By simplifying the dynamic equation of multi-stage gear transmission […]
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Dynamic performance optimization of multistage gear system
The design of gear system is not limited to the static strength check, but the important content is to consider […]
Scientific
Natural vibration characteristics of multistage gear transmission in shearer cutting section
Multi stage gear transmission is a system composed of cutting motor, cutting transmission system and cutting roller, which is used […]
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Problems in dynamic modeling of multistage gear transmission system box coupling
It should be noted that the dynamic substructure method is mainly convenient to establish the coupling dynamic model of the […]
Scientific
Analysis on natural vibration characteristics of multistage gear transmission in shearer cutting section
Mode (including natural frequency and mode) is the inherent property of multi degree of freedom system. It describes the natural […]
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Research and development of multi stage gear transmission system box coupling dynamic modeling
Choy et al established the dynamic model of the transmission system by using the transfer matrix method and the dynamic […]
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Dynamic modeling of multistage gear transmission system box coupling
With the deepening of research and the improvement of computer performance, the research object of gear system dynamics has experienced […]
Scientific
Support reaction model of multi-stage gear bearing in shearer cutting section
Bearing is a standard part widely used in all kinds of mechanical equipment, and it is the key component to […]
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Problems in gear meshing excitation modeling
There are some problems in gear meshing excitation modeling ① The time-varying meshing stiffness and static transmission error are scalars […]
Scientific
Mechanical characteristic curve of multistage gear cutting motor in shearer cutting section
The cutting motor of shearer is squirrel cage three-phase asynchronous motor. The mechanical characteristics of cutting motor refer to the […]
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Multi stage gear meshing excitation modeling
As an elastic mechanical system, gear system produces vibration and noise problems under dynamic excitation. The dynamic excitation is the […]
Scientific
Load model of multistage gear drum in shearer cutting section
The drum bears the function of cutting coal. The load on the drum has an important impact on the stress […]
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Research status and problems of gear system dynamics
Gear system is the most widely used transmission system in all kinds of mechanical equipment. Its mechanical behavior and working […]
Scientific
Multi stage gear shaft model of shearer cutting part
Gear shaft is a solid or hollow cylindrical member with variable cross-section, and its finite element model can be established […]
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Research on fatigue damage of low speed and heavy load gears by foreign scholars
Shi uses the software perdynamic (PD), which is used to analyze the crack propagation in the fracture of engineering materials. […]
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Research significance of multi-stage gear transmission dynamics of shearer cutting part
The cutting part is the core part of the shearer’s function of cutting coal and loading coal. It is mainly […]
Scientific
Dynamic model of planetary gear train of shearer cutting part
According to Newton’s second law, the dynamic equation of the system is established as follows Where I (I = R, […]
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Fatigue crack growth behavior of low speed and heavy load gears
Huang believes that the dispersion of fatigue crack growth behavior should be accurately characterized in the structural integrity assessment based […]
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Multi stage gear transmission of shearer cutting part
Coal is China’s basic energy and important chemical raw materials. Coal industry is an important basic industry related to national […]
Scientific
Dynamic model of planetary gear train
The internal excitation of planetary gear train is complex, and the power transmission path changes with the turnover of planetary […]
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Research on fault mechanism of low speed and heavy load gear
Heavy duty gear is the core component of large equipment transmission, which is widely used in many industries such as […]
Scientific
Finite element polycondensation model of multi-stage gear rocker box in shearer cutting section
Firstly, the finite element model of rocker box is established in ABAQUS, and its mass matrix and stiffness matrix are […]
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Optimal design of bevel gear transmission mechanism
The function of bevel gear is to transmit the motion and power between two intersecting axes. Similar to cylindrical gears, […]
Scientific
Large deformation gear model
By using the lumped parameter method, a 12 degree of freedom dynamic model of a pair of fixed axis gears […]
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Finish machining of super large modified gear
From the point of view of the purpose of designing super large modified gear (medium hard tooth surface and medium […]
Scientific
Micro element load calculation of sheet gear pair
Taking any slice gear pair in Fig. 1 as an example, the calculation method of micro element meshing force FIJ […]
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Rough machining of super large modified gears
According to the characteristics and cutting pattern of hobbing super large modified gear, the maximum wear of hob occurs at […]
Scientific
Model description of large deformation gear
As shown in the figure is the schematic diagram of the large deformation gear model. In this model, the main […]
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Rotation direction matching of super large modified gear hob
It can be seen from practice that in hobbing large modulus multi tooth number gears, because of the large cutting […]
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Study on carburizing process of low speed and heavy gear
The traditional gas carburizing method uses a single liquid (such as kerosene) carburizing to control the surface carbon content and […]
Scientific
Optimization design example of bevel gear transmission mechanism
It is known that the transmission mechanism of an automobile engine is a closed bevel gear transmission mechanism with 90 […]
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Datum point and tangent point of axial displacement of super large modified gear hob
The principle of axial displacement method: (1) when the hob moves along the cutter bar, the thread of cutter teeth […]
Scientific
Mathematical model of optimum design for bevel gear transmission mechanism
In the optimization design of bevel gear transmission mechanism, the minimum volume sum of bevel gear pair is taken as […]
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Flame surface hardening method for low speed and heavy load gear with soft tooth surface
In heavy mining and building materials machinery, a large number of large gear pairs with open drive are used. The […]
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Theoretical length of hob for cutting metal in gear slot
When the standard hob is used to hobbing the super large modified gear, the phenomenon of non involute tooth profile […]
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Carburizing and quenching heat treatment process for low speed and heavy duty gears
Mining machinery, transportation machinery and other low-speed heavy-duty gear, require the use of high reliability carburized hardened gear after grinding. […]
Scientific
Segmented hobbing of super large modified gear with standard hob
Firstly, the difference Δ n (that is, Δ n = N-N) between the minimum number of effective axial cutter teeth […]
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Hobbing super large modified gear with standard hob
In order to improve the load-bearing capacity and service life of low-speed, heavy-duty, large modulus, multi tooth number and large […]
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Solutions to failure of asteroid gearbox
Due to the requirements of structure and economy, the planetary carrier must be designed with the structure of thin left […]
Scientific
Theoretical length of hob for cutting metal in gear slot
In Figure 1, at the cutting end of the hob, although the hob teeth beyond the meshing length LM do […]
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Failure analysis of asteroid gearbox
In the early stage of new product development, there must be sufficient simulation analysis and calculation and a large number […]
Scientific
Theoretical hob length for enveloping gear profile
The analysis and calculation of the cutting edge length of hob is not important for the gear with medium and […]
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Structure and problem description of asteroid gearbox
The main components of planetary transmission include sun gear, planetary gear, ring gear, planetary carrier, pin shaft and bearing, which […]
Scientific
Correction of installation angle λ of hob for super large modified gear hobbing
The practice shows that using standard hob to gear hobbing this kind of gear with incorrect method may cause abnormal […]
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Failure analysis of an asteroid gearbox
Asteroid gear has compact structure and high reliability. It is usually used for reducing transmission in industrial fields (rotary, walking, […]
Scientific
Case analysis of gear fault based on morphological wavelet and fuzzy entropy
In order to verify the superiority of fuzzy entropy in the fault classification of transmission gears, based on the gear […]
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A method for measuring axial parallelism of gear pair in gearbox
Gear transmission is a device that transmits motion and power by gear pair. It is the most widely used mechanical […]
Scientific
Application of fuzzy entropy in gear fault classification
Suppose that the original time series of gear fault signal is: [x (n)] = x (1), X (2) Then the […]
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Gear fault classification based on morphological wavelet and fuzzy entropy
When the transmission gear has cracks, broken teeth and other faults, it will produce impact characteristics. Because of the impact […]
Scientific
Application of morphological wavelet in gear fault classification
Morphological wavelet is a non-linear extension of traditional linear wavelet based on mathematical morphology. Mathematical morphology and its related operators […]
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Application of morphological wavelet and fuzzy entropy in gear fault classification
As one of the key assemblies of armored vehicle transmission system, the gear failure of transmission often leads to the […]
Scientific
Stress intensity factor of helical gear root crack and influence of J-integral simulation position
Three dimensional crack models at different positions are established on the helical gear, and the stress intensity factor and J-integral […]
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Evolution process and dynamic response analysis of gear fatigue pitting
Through the gear contact fatigue test-bed, the evolution process of gear fatigue pitting phenomenon and the vibration response characteristics of […]
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Stress intensity factor and J-integral of helical gear crack
The finite element software is used to simulate the helical gear with three-dimensional cracks, and the values of stress intensity […]
Scientific
Stress intensity factor of helical gear root crack and influence of J-integral simulation length
In order to study the effect of crack length on stress intensity factor and J-integral, the above semi elliptical initial […]
Scientific
Stress intensity factor of helical gear root crack and influence of J-integral simulation load
After the three-dimensional model of the gear is established, the material used in gear simulation is 17CrNiMo6, and then the […]
Scientific
Contact stress response characteristics of gear under fatigue pitting
As shown in the figure, the maximum contact stress response curves of the tooth surface without pitting and with pitting […]
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Application of high efficiency cutting tool in engineering gear machining
Using coating technology In the process of construction machinery gear processing, coating technology has a very important application, and 70% […]