ZHY Gear adds three sinusoidal signals with different frequencies, and adds random signals for simulation analysis. The EMD method combined […]
Data preprocessing The data comes from the unit operation data recorded by SCADA system of a wind farm in Northwest […]
As an important part of wind turbine, gearbox is mainly composed of gear, rolling bearing and other parts. The common […]
The input torque tin = 1 000 n · m, the output torque tout = – 100 N · M. […]
1.EEMD principle In order to solve the mode aliasing phenomenon of IMF in the process of empirical mode decomposition (EMD), […]
In the study of multi degree of freedom system, the influence of viscous damping should be considered. The differential equation […]
Analysis of upsetting forming of mechanical gear The equivalent stress of initial cylindrical blank upsetting forming of mechanical gear is […]
In order to verify the superiority of this method in engineering application, relevant tests are carried out on the closed […]
The coupling of mild wear fault data produces a 1.5-dimensional envelope spectrum, as shown in Figure 1. It can be […]
When multiple faults coexist, different fault features need to be decomposed into different intrinsic mode functions. Therefore, EEMD is needed […]
In the whole life cycle experiment of planetary gear box, ZHY gear selects three groups of data of different time […]
In the process of tractor gear transmission, the transmission load is large, the running speed is low, and the transmission […]
As the most commonly used mechanical transmission components, gearbox faults are very common, including gear faults, bearing outer ring, inner […]
The experimental system consists of three-stage planetary gearbox, motor, brake and its switch, sensors (acceleration sensor, eddy current sensor, etc.) […]
Gearbox has the advantages of compact structure and high transmission efficiency, which is the most widely used transmission component at […]
In the previous literature, 1.5-dimensional spectrum can be used to detect the secondary phase coupling, that is to say, frequency […]
Because the wind turbine often works in the harsh environment, the number of units is too much, so the fault […]
According to the analysis of the forming process of the mechanical gear forging parts, there are two main forming processes […]
According to the different definitions, the 1.5-dimensional spectrum of the complex harmonic signal can detect the components involved in coupling […]
In order to further verify the effectiveness of this modification method, the optimized gear is assembled on the transmission for […]
Gear modification has great influence on the vibration and noise of gear and the load distribution on the tooth surface. […]
There are some defects in the process of die forging, such as insufficient mold filling and cracks. In order to […]
Because the Gaussian process of the third-order cumulant spectrum is zero, it is often used to analyze the non Gaussian […]
In order to reduce the vibration and noise of gear in the process of power transmission and reduce the impact […]
Taking the gear transmission mechanism of a five speed transmission as the research object, the gear transmission mechanism model of […]
Gear is the most common power transmission mechanism used in various types of transmission. It has the advantages of strong […]
As an important transmission system of mechanical equipment, mechanical gear has the advantages of high transmission efficiency, high transmission precision, […]
The basic ideas of finite element analysis are summarized as follows 1) The continuous structure is discretized into a calculation […]
Although the conventional design can meet the requirements of transmission function, the design scheme is not the optimal design scheme […]
Due to the advantages of small volume, large transmission ratio, strong bearing capacity and high efficiency, planetary gearbox is widely […]
Five models are used to test the model fault on the validation data set. The validation data set has 5000 […]
Because planetary gearbox has larger transmission ratio and higher load efficiency than traditional fixed shaft gearbox, it is widely used […]
In the process of planetary carrier transmission, the axis of planetary gear will be offset, and the load distribution in […]
Wind energy is a kind of clean and renewable energy, which develops rapidly in recent years, and the installed capacity […]
The contact analysis of meshing gears of planetary gear train is carried out by using transient dynamic model. To simplify […]
The transmission scheme is determined according to the technical requirements for the reducer. The transmission schematic diagram and assembly drawing […]
Gear as the transmission device of mechanical equipment, its health has a great impact on the stability and life of […]
Put the two standard S-N curves together, the abscissa is the number of stress cycles, the ordinate is the contact […]
The main failure modes of gear transmission are tooth surface pitting and tooth fracture. The working time of the reducer […]
The rudder plays an important role in the control of flight direction and attitude. The reducer of steering gear mainly […]
In the calculation of the two standards, the calculation service factors of the two factors are involved. In the international […]
20mncr5 hardenability alloy steel, which is commonly used in Europe and China, is selected as the material for tractor gearbox […]
Using the above method to calculate the NC machining coordinate of spiral tooth non bevel gear, the gear pitch curve […]
In the gear standard design of American Standard ANSI / AGMA 2001-d04 and international standard ISO / TS 6336-2, the […]
The cutting of spiral bevel gear is carried out according to the principle of “imaginary flat top gear”. As shown […]
For the non-circular gear, assuming that the radius of the imaginary flat top gear is equal to the spherical radius […]
As the core component of mechanical transmission system, planetary gearbox is widely used in various mechanical equipment. Due to the […]
Bevel gear is widely used in vehicle differential, machine tool transmission box and other transmission machinery. The non-circular bevel gear […]
Because the coordinate system of milling cutter head is not the coordinate system of CNC machine tool, but also requires […]
In the process of gear machining, it is often affected by geometric eccentricity and motion eccentricity, and causes corresponding gear […]
As shown in the figure, according to the geometric relationship, the turning angle of single tooth is cut according to […]
The mechanical fault comprehensive simulation test bench produced by a company is used to carry out the fault feature extraction […]
Gear shaving cutter has a very important impact on the machining accuracy of gears. Therefore, the relevant technical operators need […]
The inclination of spiral bevel gear teeth is measured by the helix angle β I. The longitudinal tooth profile of […]
The machining accuracy of gear blank is very important for the final gear machining accuracy improvement. Therefore, in order to […]
For bevel gear, pitch curve is circular, and each tooth is the same. During machining, the starting position of the […]
The signal f is decomposed into k IMF components, each of which is a finite bandwidth with different center frequency. […]
In order to calculate the order tracking, a reference axis should be selected as the basis of calculation. The main […]
For the improvement of gear machining accuracy, it is necessary to control and manage the related processes of gear machining […]
For the involute gear, the tooth profile parameters are mainly the number of teeth Z, modulus, pressure angle α, modification […]
