helical gear

(1) Gear profile optimization modification+tooth direction drum modification Figures 1, 2, 3, 4 and 5 respectively show the composite modification

(1) Influence of pressure angle on transmission error of helical gears Figure 1 shows the relationship curve between pressure angle

(1) Optimal modification of linear addendum with long tooth profile Figures 1, 2 and 3 respectively show the simultaneous long

(1) Selection of long and short modification methods Long modification refers to the repair and removal of the part from

For helical gear pair transmission, the number of rotation cycles of the pinion is more than that of the big

As shown in Figure 1 (a), under ideal or no-load conditions, the helical gear pair can mesh smoothly and bear

In order to solve the problem of serious squealing and knocking noise of helical gears in the reduction gearbox, improve

Knocking mainly occurs on the helical gear box components such as meshing no-load helical gear, synchronizer and sliding sleeve. Due

Helical gear squeal is a kind of pure noise with medium high rate and low sound pressure level, which is

In order to verify the reliability of this method, the author carried out experimental verification. The tested helical gears are

As shown in Fig. 1, due to the special tooth shape of helical gears, the brightness and contrast of the

Helical cylindrical gear is referred to as helical gear for short. The tooth line of helical gear is the combination

The significance of this step is to determine the sign of R and B. First, the connected domain with too

1. Composition of measurement system In order to meet the industrial production environment, the helical gear angle measurement system should

In order to reduce the transmission error below 1, the modification amount of helical gear is analyzed. First, analyze the

The transmission error of the first stage reduction driving helical gear in the reducer of a pure electric vehicle is

Parameters Driving wheel Driven wheel Number of teeth 29 48 Modulus 1.75 1.75 Helix angle 16 16 Accuracy class 7

Regardless of the deformation, the meshing point of a pair of helical gears at any time should be on the

Taking the high-speed input stage gear pair in the secondary reducer of a pure electric vehicle as the research object,

The contact pressure history curve during helical gear meshing is shown in Figure 1. It can be seen that the

The meshing of helical gears can be regarded as line contact, and the load changes and distributes along the contact

1. Law of equivalent stress and time change during helical gear meshing The variation law between the dynamic contact equivalent

Increase the speed of helical gear from 25rad / s to 35rad / s, and keep the torque unchanged. Using

Because the coincidence degree of helical gear is not an integer, its meshing transmission process is alternating between single and

(1) Equivalent stress nephogram of helical gear at 0.0025s It can be seen from Fig. 1 that the contact stress

The load distribution along the contact line is affected by the position and length of the helical gear contact line.

(1) Through analysis, it can be seen that there is no mechanism to determine the size of helical gear drum

Figure 1 shows the influence curve of friction on the second-order superharmonic resonance. With the increase of friction, the vibration

As shown in the figure, the dynamic contact equivalent stress of helical gear and the history curve changing with time

Nephogram of contact pressure during helical gear meshing: It can be seen from Figure 1 that the contact pressure is

Helix angle is an important structural parameter of helical gear, and it is also the main factor causing time-varying contact

The simulation process of helical gear dynamic contact has been introduced in detail before. The mesh division is also divided

The dynamic characteristics of the main influencing factors of helical gear vibration and noise are studied. Considering the dynamic characteristics

Helical gear accuracy mainly controls the transmission accuracy between helical gears during operation, such as transmission stability, instantaneous speed fluctuation,

In fact, the helical gear is installed on the support shaft. When the gear teeth transmit power through the support

The provided helical gear parameters are substituted into the algorithm in this paper. The comparison of calculation results is shown