As a leading enterprise in the galvanized & pre-painted industry in china. Shandong Xinghan Materail Corporation with an annual output of 1 million tons of picking coils. 1 million tons of cold roll. 800,000 tons of hot-dipped galvanized and galvalume steel sheets. 450,000 tons of thicker galvanized steeel sheets.300,000 tons of pre-painted steel sheets. occupies a stable leading position in the industry.
The company has 4 set of cutting and corrugated machines.It is a further produce on basis of GI/GL or Pre-painted products. Coruugated sheets range 0.12mm-0.45mm, width range 650-1100mm.
Corrugated Steel Plate,Corrugated Metal Panels,Corrugated Steel Sheets,Corrugated Metal Roof Panels SHANDONG XINGHAN MATERIAL CORPORATION , https://www.xinghansteel.com
The sun gear floats as shown, the sun gear float mechanism is the sun gear connected to the high speed shaft through a two-tooth or single-tooth coupling. The double-toothed coupling float allows a certain radial displacement between the coupling and the coupled axis and a 158 heavy-duty skew angle, generally allowing a radial displacement of y = 0463 mm, allowing an angular displacement of 30; allowing the use of drum-shaped teeth, allowing The angular displacement=3. It not only makes the load distribution between the planetary gears tend to be uniform, but also improves the load distribution of the meshing tooth surface along the tooth width direction, and the floating effect is good.
Schematic diagram of the sun gear floating mechanism (a) double-toothed coupling floating (b) single-toothed coupling floating single-tooth coupling can only produce angular displacement, when the sun wheel floats, its axis should have a skew angle, thus making It is skewed from the gear busbar at the meshing point of the planet wheel. The presence of the yaw angle causes the load to be unevenly distributed along the tooth width direction, reducing the load carrying capacity.
Good results are only achieved when the distance between the midpoint of the tooth width of the sun gear and the midpoint of the tooth width of the coupling is large enough. The single-tooth coupling will increase the axial dimension of the transmission and will only be used when the structure permits. In general, it is advisable to use a two-tooth coupling for floating.
The outer teeth of the coupling are often designed as drum teeth, and the floating effect is better. The internal teeth are involute straight teeth, pressure angle = 20, tooth top height coefficient ha = 08, tooth width b = 13d (d is the index circle diameter); the number of teeth should be selected to avoid radial cutting of the internal gear, According to the basic parameters of the shaper, the displacement coefficient and the minimum number of teeth should be selected; the accuracy of the internal and external teeth of the coupling is generally 7 steps.
The sun wheel is light in weight, sensitive in floating, simple in structure, easy to manufacture and install, and the transmission is effective at medium and low speeds. Moreover, since the sun wheel is suspended and suspended, there is no rigid support. Therefore, the tooth width coefficient d can take a larger value, the diameter of the sun gear is reduced, the circumferential speed is reduced, and the dynamic load is reduced. Therefore, the sun wheel floating application is more extensive.
Internal gear floating internal gear floating is usually the internal gear connected to the body or output shaft through a double-tooth or single-tooth coupling, as shown in a and b. The utility model has the advantages of small axial dimension and compact structure; the disadvantage is that the size and weight of the floating member are large, and the sensitivity of the floating is poor. The internal load floating effect of the internal gear is not as good as that of the sun gear, so the speed can not be too high when used in the differential mechanism. Schematic diagram of the internal gear floating mechanism (a) NGW type internal gear double-tooth coupling floating (b) NGWN type internal gear single-tooth coupling Floating 23 Planetary floating carrier is connected to the low-speed shaft through a double-tooth coupling. The floating of the planet carrier can simplify its structure, especially for the reasonable layout of multi-stage planetary transmission.
Because of its large force, the planet carrier is good for floating. However, because the planet carrier is self-contained, when the speed is high and the manufacturing precision is low, it will cause a large centrifugal force after floating, which will affect the uniform load effect and work stability. Therefore, the planet carrier float is suitable for medium and small size and medium and low speed planetary transmission.
The sun gear and the planet carrier float in the planetary transmission at the same time, and the effect of using two basic members to float at the same time is better than when the two float separately. This method is generally used in multi-stage planetary transmissions, such as the intermediate stage of a three-stage NGW type reducer.
Both the sun gear and the internal gear float both at the same time. The sun gear and the internal gear are both floated by a double-toothed coupling. This load-carrying mode is mainly used for high-speed planetary transmission. The advantages are low noise, stable operation and good load sharing effect. The floating structure of the statically-determined structure is a schematic diagram of the statically-determined structure of the 2KH planetary transmission.
2KH planetary transmission static definite structure diagram The number of planetary wheels of this mechanism Np=3. In order to form a statically fixed structure, the sun gear is connected with the input shaft by a single-tooth coupling, and each spherical wheel is equipped with a spherical spherical roller. The advantage of the bearing, the load-carrying device is that there is no unnecessary constraint in the whole mechanism, and the load can be evenly distributed along the tooth length direction.
The excess constraint q for the planetary gear mechanism can be calculated as follows: q = W-6n 5k = 1kPk = W-6n 5P5 4P4 3P3 2P2 P1 (1) where W is the degree of freedom of the mechanism; n is the number of moving members; P1 and P2P5 are the number of motion pairs, respectively. It can be seen that the number of planetary wheels of the mechanism is Np=3, the number of degrees of freedom is W=1, n=6, P5=2, P4=1, P3=3, P2=6 , P1 = 0. Substituting the above formula, then the number of redundant constraints q is: q = 1 - 66 52 41 33 26 0q = 0 (2) It can be seen that the planetary mechanism is a static system.
A load-carrying mechanism using an elastic member is a load-carrying mechanism that equalizes the load between the planetary gears mainly by deformation of the elastic member. The advantage is that the mechanism has good shock absorption, and the disadvantage is that the load imbalance coefficient is proportional to the stiffness and manufacturing error of the elastic member. The common types are as follows.
The elastic loading of the sun wheel processes the sun gear shaft into a slender elastic shaft, and the elastic deformation of the shaft causes the sun wheel to generate a certain radial displacement to achieve the uniform load. In order to reduce the load concentration along the tooth width direction, the elastic shaft should be designed in the form of a simply supported beam. The sun gear elastic load sharing mechanism is relatively simple, and the manufacturing is relatively easy, but the axial size is relatively large.
The elastic load of the planetary gears is supported by the elastic members to support the planetary gears. When the load is unbalanced, the elastic members can cause a large displacement of the loaded planetary gears (or one end of the tooth width), thereby partially transferring the load to the received The small planet wheel (or the other end of its tooth width) is loaded to improve the load distribution state. The main two ways are as follows.
(1) The load-carrying mechanism of the planetary gear on the cantilever mandrel. (Also known as flexible pins are loaded). As shown in a and b.
The elastic mandrel has an interference fit with the planet carrier, and the sleeve is also fixed to the free end of the mandrel by an interference fit with a cantilever. The outer surface of the sleeve is hung with a bearing alloy, and the planet gear rotates on the sleeve. When the load acts on the intermediate position (a), there is a load-carrying mechanism in which the large and small planetary gears are located on the cantilever mandrel at both ends of the mandrel (a) deformation diagram of the load acting on the center (b) deformation diagram of the load acting on the left end, etc. With the opposite direction of the moment, the ends of the mandrel are still parallel after deformation, that is, the axis of the planet wheel is translated. If the load acts on the left end (b) of the planet gear, the left end produces a corresponding displacement and tilts the mandrel with the axis of the planet wheel, and this tilt will cause the load to partially shift to the right, thus allowing the load to be The tooth width distribution tends to be uniform. The flexible pin-loading mode has been applied to some high-power planetary transmissions. For example, MAAG's high-power vertical grinding reducer uses a flexible pin to load.
(2) The load sharing mechanism of the floating wheel of the planetary wheel. An intermediate floating ring is arranged between the planetary wheel and the planetary shaft, and the floating ring and the planetary shaft can be rolled, slid or fixedly engaged. The floating ring can rotate at the same speed as the planetary gear, and a thick oil film is formed between the two, and the oil film thickness is more than twice as thick as that of the ordinary sliding bearing. Hydrodynamic pressure is generated in the thick oil film to balance the external load. When the load distribution is unbalanced, the thickness of the oil film changes with the load size, and the oil film thickness will be reduced when the load is large, so that the load sharing effect is achieved, that is, the oil film floats and loads.
