Yantai Bonway Manufacturer

High torque planetary gearbox

high torque planetary gearbox is also called high torque planetary gearbox. In the high torque planetary gearbox family, high torque planetary gearbox is widely used in servo motor, stepper motor, dc motor and other transmission systems for its small size, high transmission efficiency, wide deceleration range, high precision and many advantages. Its function is to ensure precision transmission on the premise, is mainly used to reduce the speed of increase torque and reduce the load/motor moment of inertia ratio.

High torque planetary gearbox

high torque planetary gearbox is also known as high torque planetary gearbox.In the high torque planetary gearbox family, the high torque planetary gearbox is widely used in the servo motor, stepping motor, dc motor and other drive systems because of its small size, high transmission efficiency, wide reduction range, high accuracy and many other advantages.Its function is in the premise of ensuring precision transmission, mainly used to reduce the rotation speed and increase torque and reduce the load/motor rotational inertia ratio.

The operating temperature of high torque planetary gearbox, solar wheel and inner gear ring is generally from -25℃ to about 100℃ in the working environment temperature -40℃-+45℃

Operating Parameters

high torque planetary gearbox gear transmission circular speed does not exceed 10 m/s.

The input shaft speed shall not be higher than 1500 RPM.

Deceleration machine working environment temperature to 40 ℃ to + 45 ℃.

high torque planetary gearbox can be used for forward and reverse operation.

1 introduction

2 operating parameters

3 fault solving

4 key points of selection

5 structure composition

Introduction to edit

The main transmission structure of high torque planetary gearbox is: planetary wheel, solar wheel, inner gear ring, planetary frame.

Due to structural reasons, single-stage deceleration is minimum 2.8, maximum is generally not more than 12.5, common deceleration ratio is: 3/4/5/6/8/10, high torque planetary gearbox series is generally not more than 3, but some large high torque planetary gearbox than custom high torque planetary gearbox has 4 stages of deceleration.Compared with other high torque planetary gearbox, high torque planetary gearbox has the characteristics of high rigidity, high precision (single stage can achieve less than 1 point), high transmission efficiency (single stage in 97-98%), high torque/volume ratio, life maintenance free.Because of these characteristics, planetary high torque planetary gearbox is mostly installed in the stepper motor and servo motor, used to reduce the speed, improve the torque, matching inertia.Rated input speed of high torque planetary gearbox can reach up to 18000rpm(related to the size of the high torque planetary gearbox itself, the larger the high torque planetary gearbox, the smaller the rated input speed) above, the operating temperature is generally from -25℃ to about 100℃, its working temperature can be changed by changing the grease.

Precision high torque planetary gearbox with servo motor so the backclearance level (arc minute) is very important, different backclearance level price difference is quite big, high torque planetary gearbox can do multiple gear box connection maximum reduction ratio of 100000.

Run parameter

The circular speed of the high torque planetary gearbox gear transmission shall not exceed 10 m/s.

Input shaft speed shall not exceed 1500 RPM.

high torque planetary gearbox operating environment temperature -40℃-+45℃.

The high torque planetary gearbox can be used for forward and reverse running.
High torque planetary gearbox Rated output torque
22000...1920000Nm
Rated power (n1=1400min)
0.4....9550KW
Reduction ratio
25...4000 (imax: 13795)
Reducer model
Coaxial
Right angle
Output form
Foot and flange mounting
Output shaft: keyed solid shaft, spline shaft, hollow spline shaft
Hollow shaft with locking plate
Input type
IEC hole input and axis input (half coupling) motor interface
Servo motor interface
Metric and inch series solid input shaft
Reducer main options
Backstop
Combination of multiple stages
Torque arm
Applicable motors and models
Y series IEC standard and IE2 efficient single and double motor -
YVP, YVPEJ, YEJ, YDEJ series frequency conversion and brake three-phase asynchronous motor
YZP, YZPEJ, YZRE series metallurgy and lifting three-phase asynchronous motor
YB, YBEJ, YBPT, YFB series explosion-proof three-phase asynchronous motor
YGa, YGb series roller motor
Synchronous motor, DC motor, servo motor
Main motor option
Thermistor and thermal switch
Independently powered cooling fan and power off brake and energized brake
Open collector output, voltage output, complementary output and line drive output rotary encoder

Troubleshooting

In view of the problem of wear, the traditional solution is to repair welding or brush plating machining repair, but both have some disadvantages: repair welding high temperature thermal stress can not be completely eliminated, easy to cause material damage, resulting in parts bending or fracture;And the brush coating thickness limit, easy to flake, and the above two methods are metal repair metal, can not change the "hard to hard" with the relationship, in the comprehensive action of the forces, will still cause wear again.For some large bearings is unable to field solution

As for the leakage problem, the traditional method needs to remove and open the high torque planetary gearbox, replace the sealing gasket or apply sealant, which is not only time-consuming and laborious, but also difficult to ensure the sealing effect, and leakage will occur again in the operation.

high torque planetary gearbox in the long-term operation, often appear wear, leakage and other failures, the main several are:

1. Wear of the bearing chamber of the high torque planetary gearbox, including wear of the shell bearing box, the bearing chamber of the box's inner hole and the bearing chamber of the gearbox

2, high torque planetary gearbox gear shaft diameter wear, the main wear parts in the shaft head, keyway, etc

3. Bearing position of transmission shaft of high torque planetary gearbox is worn

4. The combination surface of the high torque planetary gearbox is leaking

Key points of selection

high torque planetary gearbox is the most important type of high torque planetary gearbox matching servo motor, in the selection of high torque planetary gearbox, first to determine the high torque planetary gearbox reduction ratio, if the standard high torque planetary gearbox does not have the reduction ratio you need, please choose a close or customized high torque planetary gearbox.

After the deceleration ratio is determined, multiply the rated torque of the servo motor you selected by the deceleration ratio to obtain a value that is in principle less than the rated output torque of the similar high torque planetary gearbox provided in the product record, and also take into consideration the overload capacity of the drive motor and the maximum operating torque required in practice.The maximum operating torque required shall be injected into 2 bits of rated output torque.After satisfying the above conditions, please choose the high torque planetary gearbox with the smallest volume. The high torque planetary gearbox with small volume has a relatively low cost.

Then consider the return clearance of the high torque planetary gearbox.The smaller the return clearance, the higher the accuracy and the higher the cost.The user has to choose a series of planetary gearbox that meet their accuracy requirements.Also consider transverse/radial forces and average life.Lateral/radial force high torque planetary gearbox in the installation and use of high reliability, not easy to go wrong.Generally, the average life of the servo motor is much longer than that of the servo motor.

Structural composition

high torque planetary gearbox: the main transmission structure is: planetary wheel, sun wheel, outer gear ring.

Due to structural reasons, the single-stage deceleration is at least 3, and the maximum is generally less than 10. The common deceleration ratio is 3.4.5.6.8.10. The reduction series of the high torque planetary gearbox is generally less than 3, but some of the large deceleration has 4 stages of deceleration compared with the customized high torque planetary gearbox.

Compared with other reduction gear, planetary reduction gear has high rigidity, high precision (single stage can achieve less than 1 point), high transmission efficiency (single stage in 97-98%), high torque/volume ratio, life maintenance free features.

high torque planetary gearbox rated input speed up to 18000 RPM (about high torque planetary gearbox itself size, high torque planetary gearbox, the greater the rated input speed, the smaller) above, industrial-grade high torque planetary gearbox output torque is generally not more than 2000 nm, special large torque can be done in machine of decelerate of planet of more than 10000 nm. Working temperature in 25 ℃ to 100 ℃ or so, by changing the grease can change its working temperature.

Series: the number of sets of planetary gears. Since one set of planetary gears cannot meet the requirements of a larger transmission ratio, sometimes two or three sets are needed to meet the requirements of supporting a larger transmission ratio. Due to the increase in the number of planetary gears, the length of the second or third high torque planetary gearbox will be increased and the efficiency will be decreased.

Return clearance: when the output end is fixed and the input end is rotated clockwise and counterclockwise to produce rated torque +-2% at the input end, there is a tiny angular displacement at the input end of the high torque planetary gearbox.

Planetary cycloid gear high torque planetary gearbox: the whole transmission device can be divided into three parts: the input part, the reduction part, the output part.Dislocation on the input shaft is equipped with a 180 ° of the double eccentric sleeve, turn on the eccentric sleeve is equipped with two called arm of roller bearing, the formation of H, two cycloid gear center hole is the eccentric sleeve on the turning arm bearing raceway, and by a group of cycloid gear and pin gear mesh circular permutation needle, to form tooth difference, for the internal meshing gear high torque planetary gearbox is institutions (in order to reduce friction, in small ratio of high torque planetary gearbox, the needle with needle teeth on the gear set).When the input shaft is rotated around with an eccentric sleeve, the motion of the cycloid wheel becomes a plane motion with both revolution and rotation due to the characteristics of the tooth profile curve on the cycloid wheel and the limitation of the needle tooth on the needle gear

Effect of

1) reduce the speed and increase the output torque at the same time. The torque output ratio is the ratio of the motor output to deceleration, but it should not exceed the rated torque of the high torque planetary gearbox.

2) lowering the speed also reduces the inertia of the load, and the reduction of inertia is the square of deceleration ratio.You can look at the fact that a typical motor has an inertia value.

General high torque planetary gearbox has a helical gear high torque planetary gearbox, precision high torque planetary gearbox, servo high torque planetary gearbox, rectangular high torque planetary gearbox, high torque planetary gearbox, helical gear high torque planetary gearbox, strength type high torque planetary gearbox, precise high torque planetary gearbox, cycloid pin wheel high torque planetary gearbox, the worm gear and worm high torque planetary gearbox, planetary friction type mechanical CVT machine, and so on.

Generally there are three: according to the series points reduction gear (usually less than 10:1), double reduction (is generally greater than 10:1 and less than or equal to 200:1), slow (some brands were the third level, the largest reduction ratio do 100:1, the general principle is divided into more than 100:1), but the thunder weed can be done in machine of decelerate of planet of grade 5, reduction ratio do 4592:1;

By use: military and civilian;

According to the operating environment: standard environment, low temperature environment, clean room environment and vacuum environment;

According to accuracy: standard precision and precision and ultra-precision grade;

By origin: domestic, imported, domestic assembly;

Characteristics of the

Servo high torque planetary gearbox provides cost-effective, widely used, economic and practical, the advantages of long service life, on the application of servo control, played a good effect of servo stiffness, accurate positioning control, on the operation platform with the middle and lower back gap, high efficiency, high input speed, high input torque, smooth operation, low noise characteristics,

Appearance and structure design light and small.Lifetime replacement free lubricants, with full enclosed design and IP65 protection, can be used in poor working conditions regardless of where they are installed.Industrial robots and automation of mechanical and electrical products industry.

The advantages of high torque planetary gearbox are compact structure, small return clearance, high accuracy, long service life, rated output torque can do a lot.But it's a little more expensive

Application domain

high torque planetary gearbox can be directly installed on ac and dc servo motors, widely used in the industrial field of medium accuracy.Such as: printing machine, flame cutting, laser cutting, CNC machine tools, tools, machinery, food packaging, the automation industry. Chemical too, semiconductor equipment, medical equipment, robot, manipulator, communications equipment, pharmaceutical equipment, printing equipment, packaging machinery, textile machinery, CNC machine tools, CNC pipe bender, parking equipment, measurement equipment, machine tools, precision monitoring system, automobile industry, automatic control system, etc.

Torque

Torque =9550× motor power ÷ motor input speed × speed ratio × service coefficient

Note: motor power unit [Kw]

Motor speed unit [r/m]

Unit of output torque [N·m]

Motor usage factor is the ratio of motor power and equipment power.In the process of use, the choice coefficient depends on the situation.But bigger is not better because it's too wasteful.In general, if the operation is smooth and the impact is small, the service coefficient should be greater than or equal to 1.2.If there is no impact, it will run smoothly as long as it is greater than or equal to one.

Installation method

The correct installation, use and maintenance of high torque planetary gearbox is an important link to ensure the normal operation of mechanical equipment.Therefore, when installing the high torque planetary gearbox, please be sure to strictly follow the following installation and use of related matters, carefully assemble and use.

The first step

Before installation, confirm whether the motor and high torque planetary gearbox are intact, and strictly check whether the size of each part connected with the motor and high torque planetary gearbox matches. Here are the size and matching tolerance of the positioning boss, input shaft and high torque planetary gearbox groove of the motor.

The second step

Unscrew the screw on the outer dustproof hole of high torque planetary gearbox flange, adjust the clamping ring of PCS system to align the side hole with the dustproof hole, insert the inner hexagon to tighten.After that, remove the motor shaft keys.

The third step

Connect the motor to the high torque planetary gearbox naturally.The concentricity of the output shaft of the high torque planetary gearbox and the input shaft of the motor must be consistent when connected, and the outer flange of the two must be parallel.If the concentricity is not consistent, the motor shaft will be broken or high torque planetary gearbox gear wear.

In addition, in the installation, do not use hammer and other blows, prevent the axial force or radial force too much damage to the bearing or gear.Be sure to tighten the mounting bolt before tightening the force bolt.Before installation, wipe away the anti-rust oil of motor input shaft, positioning boss and connecting part of high torque planetary gearbox with gasoline or zinc-sodium water.Its purpose is to ensure tight connection and flexibility of operation, and prevent unnecessary wear and tear.

Before the motor and high torque planetary gearbox are connected, the motor shaft keyway should be perpendicular to the tightening bolt.To ensure a uniform force, first screw the installation bolts at any diagonal position, but do not screw tight, then screw the installation bolts at the other two diagonal positions, and finally screw the four installation bolts one by one.Finally, tighten the force bolt.All tightening bolts shall be fixed and checked by the torque plate hand according to the indicated torque data.

Correct installation between high torque planetary gearbox and mechanical equipment is the same as correct installation between high torque planetary gearbox and drive motor.The key is to ensure that the output shaft of the high torque planetary gearbox and the drive part of the shaft concentricity.

Structural Dements

high torque planetary gearbox due to structural reasons, the minimum single-stage deceleration is 3, the maximum is generally not more than 10, the common deceleration ratio is :3.4.5.6.8.10, high torque planetary gearbox series is generally not more than 3, but some large deceleration than custom high torque planetary gearbox has 4 stage deceleration.

The difference between high torque planetary gearbox and gear high torque planetary gearbox is: the working principle is different, the structure is different, the use is different.

One, working principle is different

1. high torque planetary gearbox: the working principle of high torque planetary gearbox is that when the input side power drives the solar tooth, it can drive the planetary gear to rotate, and follow the track of the inner tooth ring to revolve around the center, and the rotation of the star drives the output shaft connected to the tray to output power.

2. Gear high torque planetary gearbox: the working principle of the gear high torque planetary gearbox is to tighten through the tension nail mechanism. There is a gear driven by external power in the center of the ring tooth.

3. Different USES

1. high torque planetary gearbox: high torque planetary gearbox can be used as supporting parts in lifting, mining, transportation, construction and other industries.

2, gear high torque planetary gearbox: gear high torque planetary gearbox is widely used in large mines, iron and steel, chemical industry, port, environmental protection and other fields.

The advantages of high torque planetary gearbox are small size, light weight, high bearing capacity, long life, smooth operation, low noise, large output torque, large speed ratio, high efficiency, safe performance.

The disadvantage of high torque planetary gearbox is that it has high cost and maintenance cost because of its material precision and meticulous processing mode.

The advantage of the gear high torque planetary gearbox is that it does not need cooling;Maintenance free grease lubrication, long life and quiet operation, high output efficiency;The shell is made of alloy steel with high coaxiality and dynamic balance. It can be installed on various machining center machine tools.

The disadvantages of gear high torque planetary gearbox are high rigidity and precision design, which lead to high maintenance cost.Accuracy and torque are lower than high torque planetary gearbox.

Main point of selecting type

high torque planetary gearbox is the most important type of high torque planetary gearbox matching servo motor. When selecting high torque planetary gearbox, the deceleration ratio of high torque planetary gearbox should be determined first. If the standard high torque planetary gearbox does not have the deceleration ratio you need, please choose a close or customized high torque planetary gearbox.

After determining the deceleration ratio, please multiply the rated torque of the servo motor you choose by the deceleration ratio to obtain the rated output torque of the high torque planetary gearbox in principle less than the rated output torque of the similar high torque planetary gearbox provided in the product catalog.

Troubleshooting

In view of the problem of wear and tear, the traditional solution is to repair after welding or brush plating machining, but both have some drawbacks: the thermal stress caused by high temperature welding can not be completely eliminated, easy to cause material damage, resulting in bending or fracture parts; And brush plating is limited by coating thickness, easy to flake, and the above two methods are metal repair metal, can not change the "hard to hard" cooperation relationship, in the comprehensive action of various forces, will cause re-wear.

And in view of leakage problem, the traditional method needs to remove and open the high torque planetary gearbox, replace the sealing gasket or apply sealant, not only time-consuming and laborious, but also difficult to ensure the sealing effect, there will be leakage again in the operation.