Tag: Speed Reducer

A gear reducer is a power transmission mechanism that uses gears to reduce the rotational speed of a motor to a desired speed while obtaining a larger torque. Gear reducers are widely used in current power and motion transmission systems. However, the noise pollution from gear reducers is a major factor damaging the environment, interfering with people's rest, study, and work. Low-noise gear reducers should be a research and development topic for gear reducer manufacturers. Reducing gear transmission noise during gear reducer operation is an important research topic in the industry. Many scholars at home and abroad consider the change in gear meshing stiffness in gear transmission as the main factor affecting gear dynamic load, vibration, and noise. By modifying the gear shape to minimize dynamic load and speed fluctuations, noise reduction can be achieved. This method has proven to be quite effective in practice. However…

ZQD type cylindrical gear reducer: The ZQD type reducer is a three-stage transmission with an added high-speed stage, located at the top, while minimizing changes to the input and output shaft positions and equipment dimensions of the ZQ type reducer. ZQD type large transmission ratio cylindrical gear reducers come in six specifications: ZQD350+100, ZQD400+100, ZQD650+150, ZQD850+250, and ZQD1000+250. Cycloidal pinwheel reducers are novel transmission machines utilizing the K-H-V low-tooth-difference transmission principle and cycloidal pin-tooth meshing. They are widely used in drive and reduction equipment in textile printing and dyeing, light industry and food, metallurgy and mining, petrochemical, hoisting and transportation, and engineering machinery fields. Types, specifications, and their descriptions: 1. Cycloidal pinwheel reducer types are divided into: single-stage and two-stage. Single-stage reducers have 10 types: 12, 15, 18, 22, 27, 33, 39…

A speed reducer is a component that transmits power. It's used when a relatively large torque is required, but not when extremely high speeds are needed. Examples include conveyor belts, winches, and automated special-purpose machines. Due to industrial development and increasing factory automation, the use of speed reducers is constantly increasing. Generally, there are many methods of speed reduction, but gears are commonly used to achieve this, significantly reducing space and cost. A frequency converter (VFD) is a device that replaces AC power with AC power to power the motor. It controls the entire main circuit. The rectifier circuit converts AC power to DC power, and the DC circuit smooths the output current of the entire circuit. For example, vector frequency converters require extensive frequency conversion calculations, and in some cases, torque calculations are also needed…

In daily use, we often find that speed reducers become damp due to their placement and other factors, affecting normal operation. How should we deal with this problem? 1. External heat source heating method: After disassembling and inspecting the damp speed reducer, use a high-power incandescent bulb to heat it inside, or place it in a drying oven. 2. Welding machine drying method: Before operating this method, connect the terminals of the damp windings in series, ground the casing, and then heat and dry all three windings. 3. Excitation coil drying method: Wind an excitation coil on the stator core of the speed reducer and apply alternating current to generate magnetic flux in the stator, relying on its iron loss to dry the stator. Have we understood the methods for dealing with damp speed reducers introduced above? Generally, when using the machine, we should place it in…

Several points should be noted when selecting a speed reducer type: The output shaft diameter of the selected speed reducer should not exceed the operating shaft diameter listed in the table. If the torque calculation shows that the speed is sufficient for normal operation, but there is a lack of torque during full servo output, it is necessary to implement current limiting control on the motor-side driver or torque protection on the mechanical shaft. The selection of a general-purpose speed reducer includes providing initial conditions, selecting the type, and determining the criteria. Comparatively, type selection is relatively simple, but accurately providing the operating conditions of the speed reducer and understanding its design, manufacturing, and application characteristics are key to correctly and reasonably selecting a general-purpose speed reducer. The criteria selection must meet conditions such as strength, thermal balance, and the ability of the shaft extension to withstand radial loads.

Description and discussion of the classification of hardened gear reducers. Shanghai Jingchuan Reducer introduces the two main classifications of hardened gear reducers to enhance our understanding of them. This section primarily discusses two types: QJY type hardened gear reducers and QY type hardened gear reducers. I. QJY Type Hardened Gear Reducer The QJY type hardened gear reducer is a crane reducer with hardened gear surfaces (carburized and quenched gear surfaces) developed by the factory based on domestic and international market requirements. It includes three main categories and 12 basic types: QJY2, QJYD2, QJYA2, QJY3, QJYD3, QJYA3, QJY23, QJYD23, QJYA23, QJY34, QJYD34, and QJYA34. The QJY series reducers are suitable for various operating mechanisms of cranes and are also widely used in the transmission mechanisms of various mechanical equipment in transportation, metallurgy, mining, chemical, and light industries. II…

I. For reducers with oil level plugs: Check the oil level to ensure it is within acceptable limits; install the oil level plug. II. Oil Replacement: After cooling, the oil viscosity increases, making draining difficult. The reducer should have its oil changed while it is still in operating temperature. Disconnect the power supply to avoid electric shock! Wait for the reducer to cool down completely to ensure there is no risk of combustion. III. Precautions: Add new oil of the same brand; the oil level should match the installation position; check the oil level at the oil level plug; tighten the oil level plug and breather; the reducer should still be warm during oil change; place an oil collection tray under the drain plug; open the oil level plug, breather, and drain plug; drain all the oil; install the drain plug. IV. Oil Level Check: Disconnect the power supply to avoid electric shock! Wait for the reducer to cool down; remove the oil level plug to check if the oil is full; install the oil level plug. V. Oil Check: Disconnect the power supply to avoid electric shock! Wait for the reducer to cool down; open the drain plug and take an oil sample; check the oil viscosity index; if the oil is significantly contaminated…

How to install a shaft-mounted geared motor. This section primarily discusses three aspects: the installation relationship between the shaft-mounted geared motor and the working machine, the connection between the shaft-mounted geared motor and the working machine, and the installation of the reaction torque bracket. Below, Shanghai Gearbox will describe in detail how to install it. I. Installation Relationship between Shaft-Mounted Geared Motor and Working Machine To prevent deflection of the working machine's main shaft and the generation of additional forces on the gearbox bearings, the distance between the gearbox and the working machine should be as small as possible without affecting normal operation, ideally 5-10mm. II. Connection between Shaft-Mounted Geared Motor and Working Machine The gearbox is directly mounted on the working machine's main shaft. When the gearbox operates, the reaction torque acting on the gearbox housing is balanced by a reaction torque bracket installed on the gearbox housing or by other methods. The gearbox is directly fitted to the working machine, with the other end connected to a fixed bracket. III. Installation of the Reaction Torque Bracket The reaction torque bracket should be installed on the working machine facing the gearbox…

Boosting Servo Motor Torque: The development of servo motor technology has progressed from high torque density to high power density, increasing speeds above 3000 rpm. This increased speed significantly improves the power density of servo motors. Whether a servo motor needs a speed reducer depends primarily on the application requirements and cost considerations. This requirement arises when it's necessary to move the load and demand precise positioning. Common applications include automated equipment in aerospace, satellite, medical, military technology, wafer fabrication, and robotics. A common characteristic is that the torque required to move the load often far exceeds the torque capacity of the servo motor itself. Increasing the output torque of the servo motor through a speed reducer effectively solves this problem. One method to increase output torque is to directly increase the servo motor's output torque, but this method requires expensive magnetic materials, and the motor itself needs to be more robust…

Depending on the requirements for accuracy, transmission smoothness, and load distribution uniformity, the precision of a speed reducer can be divided into several grades. When the application environment varies, we need to adopt the following methods to adjust its precision. Let's take a look! 1. Clearance Adjustment Method: During operation, the speed reducer will experience friction, causing changes in the dimensions, shape, and surface quality of related parts, resulting in wear and increasing the clearance between them. At this time, we need to adjust it to a reasonable range to ensure the accuracy of the relative movement between parts. 2. Error Compensation Method: By appropriately configuring the errors of the parts themselves, a certain degree of mutual cancellation is achieved, ensuring the accuracy of the equipment's movement trajectory. 3. Comprehensive Compensation Method: Using the speed reducer's own tooling to process the already correctly adjusted worktable to eliminate the comprehensive results of various precision errors. In practical production, if using a ring…

Speed ​​bumps are widely used in building materials, water conservancy, power, and engineering machinery. my country's speed reducer industry has been developing for nearly half a century, continuously updating and improving its technology to meet the needs of various industries. Outdated production capacity is gradually being eliminated, and a huge potential market awaits our further development. Today, we will explain how to change the oil in a winch speed reducer and the details to pay attention to. 1. Disconnect the power supply to avoid electric shock. Wait for the speed reducer to cool down until there is no risk of combustion; Note: The speed reducer should still be warm when changing the oil; 2. Place an oil collection pan under the drain plug; 3. Open the oil level plug, breather, and drain plug; 4. Drain all the oil; 5. Replace the drain plug; 6. Add new oil of the same brand; 7. The oil level should match the installation position; 8. Check the oil level at the oil level plug; 9. Tighten the oil level plug and breather.

Under what circumstances will a cycloidal reducer burn out? Cycloidal reducers are common speed reduction devices, convenient to use and maintain. However, improper use over a long period can damage them, and in severe cases, they may burn out. So, under what circumstances will a cycloidal reducer burn out? 1. Repetitive operation: Repetitive operation is the biggest cause of damage to the reducer. The current is very high when the reducer is opening and closing, and prolonged repeated operation is the biggest cause of reducer burnout. 2. Obstruction of the reducer: If the reducer is jammed during operation, it will generate a lot of heat and burn out the machine. 3. Unstable three-phase voltage: Unstable voltage includes different three-phase voltages, missing phase, and voltage too low. 4. Water ingress into the motor: This is also very damaging. If water gets into the motor and power is applied, it will cause an internal short circuit and burn out the machine. 5. Prolonged overload…

Key technical parameters for evaluating the performance of a planetary gear reducer include: reduction ratio, average lifespan, rated output torque, backlash, full-load power, noise, axial/radial stress, and operating temperature. 1. Number of Stages: The sun gear and its surrounding planetary gears form an independent reduction gear train. If the reducer has only one such train, it is called a "stage." To achieve a larger reduction ratio, multiple stages are required. 2. Rated Output Torque: This refers to the allowable output torque under temporary load. The maximum output torque is three times this value. 3. Backlash: With the input end fixed, when the output end rotates clockwise and counterclockwise, and a torque of ±2% is generated at the output end, there is a significant angular displacement at the gearbox output end. This angular displacement is the backlash. The unit is "arc minutes" (i.e., 1/60 of 1 degree). 4. Connection Plate Design: Suitable for various servo motors…

There are generally three methods for emergency braking of speed reducers: mechanical braking, regenerative braking, and reverse braking. Reverse braking offers the fastest braking speed. Below are the requirements for this method: 1. To effectively address the problem, it's necessary to understand the characteristics of the speed reducer's load and the specific application requirements. 2. The microcontroller-controlled motor drive circuit needs to have a reverse power supply function, such as a bridge circuit composed of four transistors or a forward rotation circuit composed of relays. 3. When braking is required, the control circuit switches from a short circuit to motor rotation. When the motor speed drops to 0, power is cut off to allow it to rotate again, and the motor stops. It's important to note that due to load changes, the time required for reverse braking to reduce the motor speed to 0 is not constant. Additionally, the speed reducer needs to be equipped with a speed sensor; otherwise, more complex control technologies, such as adaptive control, are required. You need to master these technologies for specialized applications…

With the widespread application of speed reducers in the machinery industry, our understanding of speed reducer knowledge needs to be strengthened. Only by understanding speed reducers can we operate them better. Based on our knowledge of speed reducers, we have introduced the following methods/processes: First, pay attention to the construction of the installation site for speed reducers. The installation site for speed reducers requires a flat ground and good ventilation. The installation site has a significant impact on the future use of the speed reducer. Second, pay attention to the daily maintenance of speed reducers. Don't just use them without maintenance; this is a major taboo in the use of speed reducers. No matter how good the equipment is, without maintenance, its lifespan will be reduced by at least one-third. Therefore, daily maintenance is particularly important. Daily maintenance of speed reducers includes: changing the lubricating oil, checking the equipment foundation, seals, drive shafts, etc. for proper functioning, and cleaning important parts such as the housing. The gearbox cleaning and protection machine utilizes the original oil supply and drainage system of the gearbox…

We often buy gear reducers because they are technologically advanced, space-saving, energy-efficient, high-performing, with low vibration and noise, and excellent energy saving. However, sometimes things aren't as perfect as we imagine. Gear reducers can become quite noisy over time, a problem we cannot ignore. The noise from gear reducers clashes with today's environmental protection standards. The noise is caused by the friction and collision between the gears, so it's necessary to take measures to address it. Applying lubricant between the gears can reduce friction and collision, thus minimizing noise. This is a common and effective method.

There are generally three methods for emergency braking of speed reducers: mechanical braking, regenerative braking, and reverse braking. Reverse braking offers the fastest braking speed. Below are the requirements for this braking method: 1. To effectively address the problem, it's necessary to understand the characteristics of the speed reducer's load and the specific requirements of its use. 2. The microcontroller-controlled motor drive circuit needs to have a power reverse function, such as a bridge circuit composed of four transistors or a forward/reverse circuit composed of relays. 3. When braking is required, the control circuit short-circuits to switch to motor reverse mode. When the motor speed drops to 0, power is cut off to reverse the circuit, and the motor stops. It's important to note that due to load variations, the time required for the reverse circuit to reduce the motor speed to 0 is not constant. Additionally, the speed reducer needs to be equipped with a speed sensor; otherwise, more complex control techniques, such as adaptive control, are required. You need to master these techniques for specialized applications…

Helical gear reducers are specialized reducers for various reaction vessels. Their gears utilize Gleason hypoid tooth profiles and have hardened tooth surfaces, offering advantages such as high load capacity, low noise, long lifespan, high power, and smooth operation. The overall performance is far superior to cycloidal pinwheel reducers and worm gear reducers. Helical gear reducers are driven by a V-belt, with the input section rotated by a motor via the belt. Standard V-belts are standard at the factory; however, when using explosion-proof motors, anti-static V-belts should be used. Helical gear reducers are space-saving, reliable, durable, and have high overload capacity, with power up to 200KW. They are energy-efficient, have superior performance, a reduction efficiency of over 95%, low vibration, low noise, and a rigid cast iron housing. The gear surfaces undergo high-frequency heat treatment and precision machining to form helical gears and bevel gears. This is a brief overview of the characteristics of helical gear reducers. We hope that when using helical gear reducers, you can consider their features…