Category: Gearboxes and reducers

Yongtengxiang Transmission Co., Ltd., as a well-known manufacturer specializing in screw jacks, boasts advanced production equipment and strong technical capabilities. To help you understand our products, our professionals will now explain them to you. We hope this information will be helpful. When a screw jack heats up, the thermal stress effect causes the screw to elongate, making its length unstable. This elongation can be calculated using the M40 formula, and it can be compensated for by pre-tensioning; the target value for pre-tension compensation is the negative T value. Excessive pre-tensioning can burn out the support bearings, so a pre-tension value of less than 5°C is recommended. However, pre-tensioning is not suitable if the screw diameter exceeds 50mm; a larger screw diameter requires a larger pre-tension force, which can lead to overheating and burnout of the support bearings. It is recommended to use a temperature rise of approximately 3°C as the benchmark for the compensation value T. Screw jacks include trapezoidal worm gear screw jacks and ball worm gear screw jacks…

When selecting a screw jack, it is crucial to ensure the screw shaft speed is matched to the load. Furthermore, the maximum allowable load, allowable external load, and allowable screw shaft rotation speed of the screw jack must be verified. Exceeding these specifications will severely damage the entire lifting equipment. For worm gear screw jacks, whether under static, dynamic, or impact loads, the maximum allowable load must not be exceeded. A jack with sufficient capacity must be selected based on the coefficient, operating stroke, and screw stability calibration. During operation, the surface temperature of the screw jack's reduction gear should be controlled within the range of -15°C to 80°C, ensuring the surface temperature of the moving nut also falls within this range. The load capacity of the screw jack must be considered. When selecting a screw jack, whether under static, dynamic, or impact loads, the maximum allowable load must not be exceeded. A jack with sufficient capacity must be selected based on the coefficient, operating stroke, and screw stability calibration. Determine the lifting capacity…

The QWL worm gear screw jack is widely used in industries such as machinery, metallurgy, construction, and water conservancy equipment. It features lifting, lowering, and, with the aid of auxiliary components, propulsion, tilting, and various height adjustments. The QWL worm gear screw jack is a basic lifting component with many advantages, including compact structure, small size, light weight, wide range of power sources, no noise, easy installation, flexible use, multiple functions, various matching options, high reliability, and long service life. Features: 1. The lifting height of the worm gear screw jack can increase as the pressure load decreases. 2. The allowable torque, power, and speed of the worm gear screw jack vary depending on the load being lifted, and the maximum power also varies depending on the duty cycle. 3. The operating temperature range of the worm gear screw jack is -20℃ to +80℃.

As a traditional transmission device, the worm gear reducer contains a worm gear with involute teeth. Many worm gear reducer users have very little understanding of them, let alone the analysis of common problems. Below, we'll discuss some solutions for worm gear reducer malfunctions. When disassembling and installing reducer components, avoid using hammers or other tools to strike them. When replacing gears or worm gears, use original parts and replace them in pairs whenever possible. Pay attention to tolerances when assembling the output shaft. Use anti-sticking compound or red lead oil to protect the hollow shaft and prevent wear, rust, or scale buildup on the mating surfaces, which can make disassembly difficult during maintenance. If space permits, avoid vertical installation. Vertical installation requires significantly more lubricating oil than horizontal installation, which can easily cause overheating and oil leaks.

Screw jacks are a common type of lifting component. Compared to other worm gear jacks, screw jacks have many advantages, including a more compact structure, convenient installation, small size, diverse input methods, high reliability, and long service life. However, sometimes screw jacks experience weak lifting force. What are the reasons for this? Reason 1: The pressure adjustment of the screw jack's overflow valve does not meet the relevant requirements. Adjusting it to the required pressure value will prevent the problem. Reason 2: Internal leakage in the hydraulic cylinder is a direct cause. To avoid this, the hydraulic cylinder assembly of the screw jack needs to be inspected or replaced. Reason 3: The reversing valve of the equipment is stuck or has internal leakage. The valve assembly needs to be inspected or replaced.

Before installation, confirm that the motor and worm gear reducer are intact and undamaged. Strictly check the dimensions of all connecting parts between the motor and worm gear reducer to ensure they match. This includes the dimensions and tolerances of the motor's positioning boss, input shaft, and worm gear reducer's groove. The first step is to unscrew the screws on the dustproof hole on the outside of the worm gear reducer flange, adjust the PCS system clamping ring so that its side hole aligns with the dustproof hole, and insert and tighten the Allen wrench. Afterward, remove the motor shaft key. Then, naturally connect the motor and worm gear reducer. During connection, ensure that the reducer's output shaft and the motor's input shaft are concentric and that their outer flanges are parallel. Inconsistent concentricity can lead to motor shaft breakage or worm gear reducer gear wear.

This phenomenon generally occurs in the vertical device reducer, mainly with the increase in the amount of smooth oil and oil type. Vertical device, it is easy to form a lack of smooth oil, reducer stop working, the motor and reducer transmission gear oil between the loss of gears do not get due to the smooth maintenance. When the reducer starts, the gears are not useful for lubrication, resulting in mechanical wear and even damage. How should we deal with it: the selection of the reducer device orientation. Under the circumstances of the bearing promise, try not to use vertical device. Vertical device, the increase in the amount of smooth oil is much more than the horizontal device, easy to form the reducer heat and oil leakage.

1. The high-speed shaft of the worm gear screw jack can operate in both forward and reverse directions, but its speed must not exceed 1500 rpm. 2. The operating ambient temperature of the worm gear screw jack is 0℃-40℃. When the ambient temperature is below 0℃, the lubricating oil must be preheated to 0℃ before starting. 3. The axes of the high-speed and low-speed shafts of the worm gear screw jack must be concentric with the axes of the connecting parts, and the misalignment must not exceed the allowable value of the coupling used. 4. Before the jack is officially used after installation, a load test must be performed. The load test should begin with no-load operation, and loading should begin only after no faults are found. The load test is divided into the following four stages: Stage 1 load is 25% of the rated load. Stage 2 load is 50% of the rated load. Stage 3 load is 75% of the rated load. Stage 4 load is 100% of the rated load. The oil temperature during each stage of operation must not exceed 80℃. If it does, the machine should be stopped immediately for inspection and…

Worm gears are typically made of tin bronze, while the mating worm is made of 45 steel hardened to HRC4555, or 40Cr hardened to HRC5055 and then ground to a surface roughness of Ra0.8μm using a worm grinder. Reducers wear very slowly during normal operation; some can last for over 10 years. If the wear rate is rapid, consider whether the model selection is correct, whether it is operating under overload conditions, and factors such as the material of the worm gear and worm, assembly quality, or operating environment. Worm gear reducers generally use 220# gear oil. For reducers subjected to heavy loads, frequent starts, or harsh operating environments, lubricant additives can be used. These additives allow the gear oil to remain adhered to the gear surface when the reducer stops, forming a protective film to prevent direct metal-to-metal contact under heavy loads, low speeds, high torque, and during startup. The additives contain seal conditioners and anti-leakage agents to keep the seals soft and elastic, effectively reducing lubricant leakage.

1. Compared with other products, ball screw jacks, in their design, utilize a ball screw with a driving torque of 1/3. The numerous rolling balls between the screw shaft and nut result in higher motion efficiency. Compared to traditional sliding screw pairs, the driving torque is reduced to less than 1/3, meaning the power required to achieve the same motion effect is only 1/3 of that required by using a rolling screw pair. This significantly contributes to energy savings. 2. Zero backlash and high rigidity: Ball screws can be preloaded, and this preload can reduce axial backlash to a negative value, thus achieving higher rigidity. By applying pressure to the balls within the ball screw, the repulsive force of the balls enhances the rigidity of the nut when used in mechanical equipment. 3. High-speed feed capability: Due to their high motion efficiency and low heat generation, ball screws can achieve high-speed feed (motion).

As everyone knows, the F-series parallel shaft reducer is one of the four major series of helical gear reducers. Generally, the four major series reducers are either integrated with the motor or connected via a mounting plate. So, can the F-series parallel shaft reducer be made with shaft input? The answer is yes. Moreover, different shaft diameters are available to meet the needs of different users. Below is a detailed introduction: Reducer Model Input Shaft Model Diameter (mm) Shaft Length (mm) F…37S F…47S AD1 16K6 40 AD2 19K6 40 F…57S F…67S AD2 19K6 40 AD3 24K6 50 F…77S AD2 19K6 40 AD3 24K6 50 AD4 38K6 80 F…87S AD2 19K6 40 AD3 24…

We've introduced SWL worm gear screw jacks many times before, so we won't repeat it here. Just know that SWL worm gear screw jacks are versatile and exceptionally stable lifting components. What we'll discuss here is the maximum screw extension length that SWL worm gear screw jacks can achieve. Because customers have different needs, the required screw length varies. However, everything has a standard; exceeding the standard can easily cause problems. Therefore, when selecting a model, try to choose within the standard range. The maximum screw extension length for SWL2.5 worm gear screw jacks is 1500mm; SWL 5 is 2000mm; SWL10/15 is 2500mm; SWL20 is 3000mm; SWL25 is 3500mm; SWL35 is 4000mm; SWL50 is 5500mm; SWL100 is 6500mm…

Based on the working principle of the cycloidal pinwheel reducer, the performance testing system of the reducer is studied. For transmission systems with internal connections, especially precision transmission systems, the core issue of dynamic testing research is the dynamic accuracy detection of the transmission chain. From the perspective of signal analysis, it is to obtain the characteristic information of time-domain error. From the perspective of dynamic systems, it is to test the dynamic response of the system. With the support of data processing, signal analysis, and computer technology, the transmission system utilizes a dynamic error detection device, taking the measurement of time-domain error information as the starting point. The connotation of dynamic testing of the transmission system should include the following aspects: (I) Dynamic accuracy detection of the transmission chain. The excitation of the transmission system includes the periodic excitation caused by the machining and assembly errors of various transmission components such as cycloidal wheels, pinwheels, gears, worm gears, worms, lead screws, and shafts within the chain; the torsional vibration and impact excitation of transmission components during operation; and the excitation caused by power grid fluctuations, transmission…

Lubrication is a crucial aspect of gear reducer maintenance. Open and semi-open cycloidal pinwheel reducers, or low-speed closed gear drives, typically require periodic manual lubrication using lubricating oil or grease. However, the lubrication requirements for cycloidal pinwheel reducers vary depending on the type of reducer. When the circumferential speed of the gears in a cycloidal pinwheel reducer exceeds 12 m/s, spray lubrication should be used. This involves supplying oil at a certain pressure via an oil pump or central oil supply station, and then spraying the lubricating oil onto the meshing surfaces of the gear teeth through nozzles. When v ≤ 25 m/s, the nozzle can be positioned on either the engagement or disengagement side of the gear teeth; when v > 25 m/s, the nozzle should be positioned on the disengagement side of the gear teeth to allow the lubricating oil to cool the teeth after engagement while simultaneously lubricating them. For general closed gear reducers, the lubrication…

1. Observe the machine frequently. If any abnormality occurs, stop the machine immediately and troubleshoot the problem. Stop operation until the cause is found and the fault is eliminated. 2. Pay attention to the workload during the break-in period. The workload during the break-in period should generally not exceed 85% of the rated working load. Arrange appropriate workloads to prevent overheating caused by prolonged continuous operation of the cycloidal pinwheel reducer. 3. Keep the cycloidal pinwheel reducer clean. Adjust and tighten any loose parts promptly to prevent accelerated wear or loss of parts due to loosening. 4. Use appropriate lubricating oil, especially for reducers with an input power greater than 11KW, which must be filled with medium-load gear oil. Regularly check the lubricating oil, hydraulic oil, coolant, oil level, and quality, and check the overall sealing of the machine. If excessive oil is found during inspection, analyze the cause. At the same time, strengthen the lubrication of all lubrication points. It is recommended to lubricate the lubricating oil weekly during the break-in period…

I. Installation of Cycloidal Pinwheel Reducer 1. Installation Relationship between Cycloidal Pinwheel Reducer and Working Machine To avoid deflection of the working machine's main shaft and additional force on the cycloidal pinwheel reducer bearings, the distance between the cycloidal pinwheel reducer and the working machine should be as small as possible, ideally 5-10mm, without affecting normal operation. 2. Connection between Cycloidal Pinwheel Reducer and Working Machine The cycloidal pinwheel reducer is directly mounted on the working machine's main shaft. When the reducer operates, the reaction torque acting on the reducer housing is balanced by a reaction torque bracket mounted on the reducer housing or by other methods. The other end is directly fitted to the machine, and the other end is connected to a fixed bracket. 3. Installation of the Reaction Torque Bracket The reaction torque bracket is installed on the side of the reducer facing the working machine to reduce the bending moment added to the working machine shaft. The bushing at the connection end between the reaction torque bracket and the fixed support uses an elastomer such as rubber to prevent deflection…

In the meshing transmission process of the pinwheel and cycloidal wheel, there is multi-tooth meshing. Due to this multi-tooth meshing, the load distribution between the cycloidal wheel and the pinwheel, as well as between the pin and the pin hole in the output mechanism, is very complex. It is affected by manufacturing errors, meshing clearance, and the deformation of the cycloidal wheel body weakened by the pin hole. Therefore, when studying the stress condition of a planetary cycloidal pinwheel reducer, it is often necessary to ignore some minor issues and analyze the main parameters and problems. Therefore, in the stress analysis, it is assumed that the assembly clearance of the cycloidal pinwheel reducer is zero, and the deformation of the cycloidal wheel, pinwheel housing, and rotating arm is negligible. In addition, since the cycloidal wheel performs planetary transmission, this transmission involves both revolution and rotation, which brings great difficulties to the stress analysis. Therefore, for the stress analysis, a method similar to that used in calculating the transmission ratio is adopted, assuming that the rotating arm is fixed, while the cycloidal wheel and pinwheel rotate around a fixed axis. This does not change the relative motion of the components…

What impact will eccentric sleeve quality issues have on cycloidal pinwheel reducers? The eccentric sleeve is a crucial component of a cycloidal pinwheel reducer, and quality problems with it will inevitably have a detrimental effect. So, what kind of trouble will the eccentric sleeve cause to a cycloidal pinwheel reducer? Those new to cycloidal pinwheel reducers may not be familiar with this. Simply put, during the meshing process of the reducer gears, low-quality eccentric sleeves are damaged far more frequently than high-quality ones, easily affecting the operation of the cycloidal pinwheel reducer. The eccentric sleeve in a cycloidal pinwheel reducer serves two purposes: one is to install roller bearings, and the other is to generate mechanical effects. For example, a planetary cycloidal reducer may have a double eccentric sleeve offset by 180 degrees on the input shaft, with two roller bearings mounted on the eccentric sleeve, forming an H-mechanism. The center hole of the two cycloidal wheels is the eccentric sleeve…