Calculation of tooth surface adhesion wear of involute spur gear under low speed condition
Adhesive wear is the most common fault type on the working surface of mechanical system, which often occurs on the […]
Adhesive wear is the most common fault type on the working surface of mechanical system, which often occurs on the […]
Through the gear contact fatigue test-bed, the evolution process of gear fatigue pitting phenomenon and the vibration response characteristics of
The standard involute gear with 20 ° pressure angle processed by rack cutter is shown in the figure. The complete
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
As shown in the figure, it is known that the input power P1 of the high-speed stage of the two-stage
① According to the contact fatigue strength formula of tooth surface, the The constraint conditions of tooth surface are obtained
The transmission diagram of the reducer is shown in the figure, and the optimization design is carried out according to
Given the transmission power P, transmission ratio I and output speed n of the reducer, a set of technical parameters
The load stroke curves of the two processes are shown in the figure. It can be seen from the figure
The traditional and improved processes are used for experimental study. The typical deformation conditions of the blank during the deformation
In this paper, the first mock exam of the internal gear of a solid cylinder with no hub hub and
The traditional closed die forging of internal gear is shown in figure (a). In the process of pressing the blank
With reliable transmission quality and efficiency, gears are widely used in mechanical field, especially in military industry, aerospace and other
According to the equivalent dynamic model shown in the figure, the dynamic differential equation of the system can be deduced
According to the structural characteristics of each component in the system, a multi degree of freedom equivalent dynamic model of
As shown in the figure, the relative position relationship of each gear is in the meshing state. (1) Projection of
In order to analyze the dynamics of the system, firstly analyze the acceleration of each component in the planetary gear
The model of gear transmission system is the expression of system mechanics and mathematics, and is the basis of gear
Damping is an important introduction in the study of gear system dynamics. Because the damping value of gear system meshing
In the process of actual processing and installation of gears, it is inevitable to produce a variety of errors. These
(1) When the gear teeth are in the single tooth meshing area, the total energy u in the meshing pair
In the picture: RR — pitch circle radius; RRB — radius of base circle; RRF — root circle radius; φ
In the picture: RB — radius of base circle; RF — radius of tooth root circle; Bending stiffness Kb: Shear
According to Hertz law, the elastic compression of two isotropic elastic bodies can be described by two projectile near the
As shown in the figure is a sketch of the gear meshing pair with backlash. Its function is to reserve
The meshing phase relationship of planetary gears can be determined according to the position angle of planetary gears and the
In essence, stiffness excitation is a kind of parametric excitation based on the number of teeth. In the process of
The meshing frequency of gears refers to the meshing times of teeth in unit time. For NGW type planetary gear
From the point of view of vibration theory, gear transmission system is more complex than ordinary mechanical system, and the
As shown in the figure is the structural diagram of the straight gear planetary gear transmission system. The planetary carrier
As a complex sealed rotor system, the theoretical analysis and research of the system are carried out, and the related
Based on the dynamic theory, the planetary gear speed increasing system and the rotor system with contact seal are analyzed
The physical quantity measured by the sensor is the radial vibration acceleration signal of the rotor in the sealing tester,
Considering the gear meshing characteristics of the seal rotor system dynamic characteristics test device, the actual photos and overall structure
Considering that the test system is more complex, it is affected by many objective factors such as the accessories of
The number of planetary gears is n = 3, the comprehensive meshing error amplitude is e = 10 μ m,
The physical quantity measured in the test is mainly the radial vibration of the rotor in the sealing tester. Therefore,
The rotor with contact seal is taken as the research object. The simplified model is shown in Fig. 1. The
The sealed rotor system considering gear meshing characteristics is a complex mechanical system composed of gear pairs, rotors, seals and
The planetary gear transmission system studied in this paper has fixed inner gear ring, planetary carrier and sun gear as
As shown in the figure, the relative position relationship of each gear is in the meshing state. (1) Projection of
The reason why the contact seal can play a sealing role is that the contact between the seal and the
As shown in the figure, the relative position relationship of each gear is in the meshing state. (1) Projection of
In order to carry out dynamic analysis of the system, this section first analyzes the acceleration of each component in
From the point of view of vibration theory, gear transmission system is more complex than ordinary mechanical system, and the
As shown in the figure is the translation torsion coupling dynamic model of the spur gear transmission system established in
In essence, stiffness excitation is a kind of parametric excitation based on the number of teeth. In the process of
The model of gear transmission system is the expression of system mechanics and mathematics, and is the basis of gear
Damping is an important introduction in the study of gear system dynamics. Because the damping value of gear system meshing
The meshing phase relationship of planetary gears can be determined according to the position angle of planetary gears and the
In the process of actual processing and installation of gears, it is inevitable to produce a variety of errors. These
According to Hertz law, the elastic compression of two isotropic elastic bodies can be described by two projectile near the
As shown in Fig. 1, the sketch of gear meshing pair with backlash is used to reserve the side clearance
Based on the energy method, the relationship between the z-contact stiffness, bending stiffness, shear stiffness, radial compression deformation stiffness and
(1) Design variables The design variables of static performance optimization model and dynamic performance optimization model are the same. (2)
Based on the dynamic and static characteristics, the optimization model of tooth profile modification is established, and the optimization design
Firstly, the engagement process of the gear is analyzed. The engagement state and force diagram of the gear is shown
Analyze the time-domain curve of meshing stiffness and meshing force of the gear under the optimal modification amount, and compare
The modification length is 2.8mm, the change range of modification amount is [0, 0.05mm], and the value interval is 0.02mm.
There are many types of profile modification curves. According to the different functional forms of the modification quantity with respect