Due to structural reasons, the minimum single-stage reduction ratio of planetary reducer is 3, and the maximum is generally not more than 10. The common reduction ratio is 3.4.5.6.8. 10, and the number of reducer stages generally does not exceed 3, but some large reduction ratios have four reduction ratios.
Compared with other reducers, the planetary reducer has the characteristics of high rigidity, high precision (within single stage 1 min), high transmission efficiency (97%-98% single stage), high torque/volume ratio and lifetime maintenance-free.
Because of these characteristics, planetary reducers are mostly installed on stepping motors and servo motors to reduce speed, increase torque and match inertia.
The maximum rated input speed of the reducer can reach 18000rpm (related to the size of the reducer itself, the larger the reducer, the smaller the rated input speed), and the output torque of the industrial planetary reducer generally does not exceed 2000Nm, and the specially designed super-torque planetary reducer can reach 10000Nm. The working temperature is generally around -25℃ to 100℃. By changing the grease,
Several concepts of planetary reducer;
Series: Number of planetary gears. Because a set of star wheels can't meet the larger transmission ratio, sometimes two or three sets are needed to meet the requirements of supporting a larger transmission ratio. With the increase of the number of star wheels, the length of the two-stage or three-stage reducer will increase and the efficiency will decrease.
Return clearance: when the output end is fixed and the input end rotates clockwise and counterclockwise, so that the input end generates rated torque of 2%, the input end of the reducer has a slight angular displacement, which is the return clearance. The unit is "minutes", which is one sixtieth of a degree. Some people call it back pass.
Planetary reducer is a widely used industrial product, and its performance can be comparable to other military-grade reducer products, but it has the price of industrial-grade products and is used in a wide range of industrial occasions.
The reducer has the advantages of small volume, light weight, high bearing capacity, long service life, stable operation and low noise. It has the characteristics of power splitting and multi-tooth meshing. The maximum input power can reach 104kW. It is suitable for lifting, transportation, construction machinery, metallurgy, mining, petrochemical industry, construction machinery, textile, medical instruments, meters, automobiles, ships, weapons and aerospace industries, such as new planetary series fixed-axis transmission reducers, WN master-slave gear transmission reducers, small tooth difference elastic load-sharing reducers, etc.
Planetary reducer is a new type of reducer with wide versatility. The internal gear is carburized and quenched by 20CvMnT. The whole machine has the characteristics of small structural size, large output torque, large speed ratio, high efficiency and safe and reliable performance. This machine is mainly used for the slewing mechanism of tower crane, and can also be used as a supporting component in lifting, excavation, transportation, construction and other industries. [Edit this paragraph] Product features of planetary gear reducer: The planetary gear reducer has the characteristics of light weight, small volume, wide transmission ratio range, high efficiency, stable operation, low noise and strong adaptability. Reducers are widely used in metallurgy, mining, lifting and transportation, electric power, energy, building materials, light industry, transportation and other industrial sectors.
Product description:
1 and p series planetary gear reducers adopt modular design, which can be replaced and combined according to customer requirements.
2. The reducer adopts involute planetary gear transmission, which makes rational use of internal and external meshing and power splitting.
3. The box is made of ductile iron, which greatly improves the rigidity and impact resistance of the box.
4. The gear is carburized and quenched to obtain a high-hardness wear-resistant surface, which is completely ground after heat treatment, reducing noise and improving the efficiency and service life of the whole machine.
5. P series products of planetary reducer have 9-34 specifications, and planetary transmission series has 2 or 3 grades.
Deceleration ratio:
25 ~ 4000 rpm (greater speed ratio can be achieved by combining RX, R and K series)
Output torque:
Up to 2600000 nanometers
Motor power:
0.4-12934kw
Installation form:
1, foot installation
2. Flange installation
3. Install the torsion arm.
Off-axis mode:
1, solid shaft
2. Involute spline solid shaft
3. Open spline hollow shaft
4. Hollow shaft with expansion disk
Lubrication and maintenance:
Fill the planetary reducer with grease of recommended type and value. The planetary reducer is lubricated by lubricating oil. For the planetary reducer installed vertically, considering that lubricating oil can not ensure the reliable lubrication of the uppermost bearing, another lubrication measure is taken.
Before operation, inject proper amount of lubricating oil into the planetary reducer, and the viscosity of lubricating oil shall be selected according to the following table. Planetary reducers are usually equipped with oil injection holes and oil drain plugs. Therefore, when ordering the planetary reducer, the installation location must be specified. The following table lists the brands and models of lubricants recommended for general applications.
Note: For the application of unconventional working conditions, please consult the manufacturer.
The working oil temperature cannot exceed 80℃.
The combined planetary reducer with lifelong lubrication is filled with synthetic oil at the factory. In addition, planetary reducers usually do not have lubricating oil, but have oil filling plugs and oil drain plugs. The lubricating oil quantity of planetary reducer listed in this sample is only an estimated value. Set the position of the oil level plug according to the installation position specified when ordering, so as to ensure correct oil filling, and the oil filling amount of the reducer should be determined according to different installation methods. If the transmission power exceeds the heat capacity of the reducer, an external cooling device must be provided.
Planetary reducers have single-stage, two-stage and three-stage transmission, including 12 stands, 27 models and 58 speed ratios, which can form 498 reducers with different specifications.
The reducer is mainly used in metallurgy, mining, lifting and transportation, petrochemical industry, coal energy, cement building materials, engineering building materials, engineering construction and other industries. It can also be used in light industry, textile, water conservancy, hydropower and other departments for speed reduction or speed increase transmission.
NGW planetary reducers include single-stage, two-stage and three-stage transmission, 12 stands, 27 models and 58 speed ratios, which can form 498 reducers with different specifications.
The reducer is mainly used in metallurgy, mining, lifting and transportation, petrochemical industry, coal energy, cement building materials, engineering building materials, engineering construction and other industries. It can also be used for light industry spinning. Applicable conditions:
The peripheral speed of the gear drive of the reducer shall not exceed 10 m/s.
The input shaft speed is not higher than1500rpm.
The working environment temperature of the reducer is -40℃-+45℃.
Reducer can be used for forward and reverse operation. [Edit this paragraph] Working principle of planetary gear reducer: Legend 1
1) The gear ring is fixed, sun gear is active, and the planet carrier is passive.
As can be seen from the legend 1, this combination is speed-down transmission, the transmission ratio is generally 2.5 ~ 5, and the steering is the same.
2) The gear ring is fixed, the planet carrier is active and the sun gear is passive.
As can be seen from the demonstration, this combination is speed-increasing transmission, and the transmission ratio is generally 0.2 ~ 0.4.
Turn in the same direction.
Legend 2
3) sun gear is fixed, the gear ring is active and the planet carrier is passive.
As can be seen from the demonstration, this combination is speed-down transmission, and the transmission ratio is generally 1.25 ~ 1.67.
Turn in the same direction.
4) sun gear is fixed, the planet carrier is active and the gear ring is passive.
As can be seen from the demonstration, this combination is speed-increasing transmission, and the transmission ratio is generally 0.6 ~ 0.8.
Turn in the same direction.
Legend 3
5) The planet carrier is fixed, sun gear is active, and the gear ring is passive.
As can be seen from the demonstration, this combination is speed-down transmission, and the transmission ratio is generally 1.5 ~ 4.
Turn in the opposite direction
6) The planet carrier is fixed, the gear ring is active and the sun gear is passive.
It can be seen from the demonstration that this combination is speed-increasing transmission, and the transmission ratio is generally 0.25 ~ 0.67.
Turn in the opposite direction
Legend 4
7) When any two of the three elements are combined into one:
When the planet carrier and the ring gear are integrated as driving parts, and the sun gear is a passive part or
The sun gear and the planet carrier move as a whole as the active part, and the gear ring as the passive part.
Conditions. As can be seen from the demonstration, there is no relative motion of the planetary gears as a whole.
Body running, transmission ratio 1, steering is the same. This combination is usually used in cars, forming a direct
Documents.
Legend 5 provided by Xiamen youmujin electromechanical technology co., ltd.
8) Any one of the three elements is active, and the other two elements are free:
It can be seen from the analysis that the other two components have no definite speed output. The sixth combination mode,
Because of the large acceleration, the active and passive parts turn in opposite directions, and this combination is usually not used in automobiles.
The other seven combinations are commonly used.
Legend 6 Installation method of planetary reducer provided by Xiamen Youmujin Electromechanical Co., Ltd.: In the reducer family, planetary reducer is widely used in servo, stepping, DC and other transmission systems because of its advantages of small size, high transmission efficiency, wide deceleration range and high precision. Its function is to reduce the speed, increase the torque and reduce the moment of inertia ratio of load/motor on the premise of ensuring accurate transmission. A few years ago, when users were using the reducer, the output shaft of the reducer was broken due to human factors such as illegal installation, which made the enterprise suffer unnecessary losses. Therefore, in order to better help users use the reducer, I will tell you in detail how to install the planetary reducer correctly.
Correct installation, use and maintenance of the reducer is an important link to ensure the normal operation of mechanical equipment. Therefore, when installing the planetary reducer, please be sure to assemble and use it carefully in strict accordance with the following installation and use related matters.
first step
Before installation, confirm whether the motor and reducer are in good condition, and strictly check whether the dimensions of the parts connected with the motor and reducer match. The following are the dimensions and matching tolerances of the positioning boss, input shaft and reduction groove of the motor.
Second step
Unscrew the screw on the dust hole on the outer side of the reducer flange, adjust the clamping ring of PCS system so that its side hole is aligned with the dust hole, insert the hexagon socket and tighten it. After that, remove the motor shaft key.
Third step
Connect the motor and reducer naturally. When connecting, the concentricity of the output shaft of the reducer and the input shaft of the motor must be the same, and its outer flange is parallel. Due to the inconsistency of concentricity, the motor shaft will be broken or the reducer gear will be worn.
In addition, it is forbidden to knock with a hammer during installation to prevent excessive axial force or radial force from damaging bearings or gears. Before tightening the fastening bolts, be sure to tighten the mounting bolts. Before installation, use gasoline or zinc-sodium solution to wipe the antirust oil at the joint of motor input shaft, positioning boss and reducer. Its purpose is to ensure the tightness of connection and the flexibility of operation, and to prevent unnecessary wear.
Before the motor is connected to the reducer, the keyway of the motor shaft should be perpendicular to the fastening bolt. In order to ensure uniform stress, first tighten the mounting bolts at any diagonal position, but do not tighten them, then tighten the mounting bolts at the other two diagonal positions, and finally tighten the four mounting bolts one by one. Finally, tighten the bolts. All fastening bolts shall be fixed and checked with a torque wrench according to the marked fixed torque data.
The correct installation between reducer and mechanical equipment is similar to the correct installation between reducer and driving motor. The key is to ensure that the output shaft of the reducer is concentric with the driven shaft.