1、 R series helical gear reducer

R series helical gear reducer has the characteristics of small volume, light weight, high bearing capacity, high efficiency, long service life, convenient installation, wide power range and fine transmission ratio. It can be widely used in the equipment that needs to slow down in various industries.

2、 S series helical gear worm gear reduction motor

Helical gear reducer adopts the form of direct motor connection, and the structure is the first-class helical gear plus the first stage worm gear transmission. The output is shaft mounted, with six basic installation forms. The helical gear is made of hard tooth surface, stable operation, large bearing capacity, working environment temperature of -10 ℃ ~ 40 ℃, and the product has the characteristics of large speed range, compact structure and convenient installation compared with similar products. It can be widely used in the deceleration mechanism of metallurgy, mining, lifting, light industry, chemical industry, transportation, construction and other mechanical equipment.

3、 K-series bevel gear helical gear reduction motor

Bevel gear helical gear reduction motor adopts the form of direct motor connection, and the structure is the first-class helical gear plus the first stage worm gear transmission. The output is shaft mounted, with six basic installation forms. The helical gear is made of hard tooth surface, stable operation, large bearing capacity, working environment temperature of -10 ℃ ~ 40 ℃, and the product has the characteristics of large speed range, compact structure and convenient installation compared with similar products. It can be widely used in the deceleration mechanism of metallurgy, mining, lifting, light industry, chemical industry, transportation, construction and other mechanical equipment.

4、 F series parallel shaft reduction motor

The modular design principle of unit structure is adopted for F series parallel shaft deceleration motor, which greatly reduces the type and inventory of parts and greatly shortens the delivery period. The products are widely used in light industry, food, beer and beverage, chemical industry, escalator, automatic storage equipment, construction, machinery, iron and steel metallurgy, paper making, artificial board machinery, automobile manufacturing, tobacco machinery, water conservancy, printing and packaging, pharmaceutical, textile, building materials, logistics, feeding machinery, environmental protection and other fields.

FAQ editing

Heat and oil leakage

In order to improve efficiency, worm gear reducer generally uses non-ferrous metal as worm gear, and worm adopts hard steel. Due to the sliding friction drive, more heat will be generated during operation, resulting in the difference of thermal expansion between the parts and seals of the reducer, thus forming a gap between the mating surfaces. Due to the increase of temperature, the lubricating oil becomes thinner, which is easy to cause leakage. The reasons for this situation are mainly four points: first, the material collocation is unreasonable; Second, the quality of the surface of the meshing friction surface is poor; Third, the choice of the amount of lubricating oil is not correct; Fourth, poor assembly quality and use environment.

Worm gear wear

The worm gear is generally made of tin bronze, and the matched worm material is hardened to hrc4555 with 45 steel, or 40Cr is hardened to hrc5055 and then ground to roughness Ra0.8 by worm grinder μ m。 Reducer wear is very slow in normal operation, some reducers can be used for more than 10 years. If the wear rate is fast, it is necessary to consider whether the selection is correct, whether the overload operation, as well as the worm gear material, assembly quality or use environment and other reasons.

Gear wear

Generally occurs in the vertical installation of the reducer, mainly with the amount of lubricating oil and oil varieties. When the vertical installation, it is easy to cause insufficient lubricating oil. When the reducer stops running, the transmission gear oil between the motor and the reducer is lost, and the gear can not get the proper lubrication protection. When the reducer is started, the gear is not effectively lubricated, which leads to mechanical wear and even damage.

Worm bearing damaged

In case of failure, even if the gearbox is well sealed, it is often found that the gear oil in the reducer is emulsified and the bearing is rusted, corroded and damaged. This is because after the reducer has been running for a period of time, the condensate generated after the gear oil temperature rises and cools is mixed with water. Of course, it is also closely related to the bearing quality and assembly process.

Troubleshooting editing

Ensure assembly quality

Special tools can be purchased or manufactured. When removing and installing the reducer parts, try to avoid hammers and other tools; When replacing gears and worm gears, original accessories and pairs of spare parts shall be selected as much as possible; When assembling output shaft, pay attention to tolerance matching; The hollow shaft should be protected with anti sticking agent or red lead oil to prevent wear, rust or scale on the mating surface, which is difficult to disassemble during maintenance.

Selection of lubricating oil

Generally, 220 # gear oil is selected for helical gear worm gear reducer. For reducer with heavy load, frequent start and poor service environment, some lubricating oil additives can be selected to make gear oil still attached to the gear surface when the reducer stops running, forming protective film to prevent direct contact between heavy load, low speed, high torque and metal during startup. The additives contain sealing ring regulators and anti leakage agents, which keep the sealing ring soft and elastic, and effectively reduce the leakage of lubricating oil.

Installation location selection

If the location permits, vertical installation shall not be adopted as far as possible. In vertical installation, the amount of lubricating oil added is much more than that in horizontal installation, which is easy to cause heat and oil leakage of reducer.

Lubrication maintenance

The reducer can be maintained according to the "five fixed" principle of lubrication work, so that each reducer has a responsible person for regular inspection. If it is found that the temperature rises obviously, or the oil temperature exceeds 40 ℃ or 80 ℃, the quality of the oil drops, or more copper powder is found in the oil, and abnormal noise is produced, it is necessary to stop using it immediately, repair it in time, remove the fault, and replace the lubricating oil. When refueling, pay attention to the amount of oil to ensure that the reducer gets the correct lubrication.

Maintenance method

In view of the wear and leakage of reducer, the traditional solution is to repair the repair after repair welding or brush plating, but both of them have some disadvantages: the thermal stress caused by high temperature of repair welding cannot be completely eliminated, which is easy to cause material damage, and lead to bending or fracture of parts; The brush plating is limited by the thickness of the coating, and it is easy to peel off. Both of the above methods are metal repair, which can not change the "hard to hard" coordination relationship, and will cause repeated wear under the combined action of various forces. In the west, the repair methods of polymer composites are used in the present western countries. They have strong adhesion, excellent compressive strength and other comprehensive properties, which can be removed and machined to repair on site. The repair of polymer materials has no influence on the repair heat stress and the repair thickness. At the same time, the metal materials of the products do not have the concession, which can absorb the shock vibration of the equipment, avoid the possibility of re abrasion, and greatly extend the service life of the equipment components, save a lot of downtime for the enterprise and create great economic value.

Oil spill issue editor

Cause analysis

1. The pressure in the tank increases

In a closed reducer, every pair of gears will generate heat when they are meshed. According to Boyle mallott's law, with the increase of operation time, the temperature in the reducer box will gradually increase, while the volume in the reducer box will not change, so the pressure in the box will increase, and the lubricating oil in the box will splash on the inner wall of the reducer box. As the oil permeability is relatively strong, under the pressure in the box, where the seal is not tight, the oil will seep from.

2. Oil leakage caused by unreasonable structure design of reducer

If there is no ventilation hood in the reducer, the reducer can not achieve pressure equalization, resulting in higher and higher pressure in the box and oil leakage.

3. Too much fuel

During the operation of the reducer, the oil pool is agitated severely, and the lubricating oil splashes everywhere in the reducer. If the amount of oil is too much, a large amount of lubricating oil will accumulate in the shaft seal and joint surface, resulting in leakage.

4. Improper maintenance process

During equipment maintenance, oil leakage will also be caused by incomplete removal of dirt on the joint surface, improper selection of sealant, reverse installation of sealing parts direction, and timely replacement of seals[ 1]

Treatment plan

High polymer composite materials are used to repair and control the oil leakage of reducer. High polymer composite materials are made of high polymer, metal or ceramic ultrafine powder, fiber and other base materials under the action of curing agent and curing accelerator. All kinds of materials draw on each other's strong points to make up for each other's weak points in performance and produce synergistic effect, which makes the comprehensive performance of the composite better than that of the raw materials. With strong adhesion, mechanical properties and chemical corrosion resistance, it is widely used in the repair of mechanical wear, scratch, pit, crack, leakage and casting sand hole of metal equipment, as well as the chemical anti-corrosion protection and repair of various chemical tanks, reaction tanks and pipelines. Meijiahua polymer composite material and technology can be used to treat the leakage at the static sealing point of the reducer on site without disassembly. The polymer composite material can be used to treat the leakage externally, saving time and labor, and the effect is immediate. The superior adhesion, oil resistance and 350% elongation of the product can overcome the influence caused by the vibration of the reducer, It has well solved the problems that cannot be solved for many years for the enterprise. If there is oil leakage at the static sealing point during the operation of the reducer, the oil surface emergency repair agent of surface engineering technology can be used to plug, so as to eliminate the oil leakage.

Advantages and disadvantages editing

advantage

1. Good meshing performance, low vibration, low noise, smooth transmission.

2. The coincidence degree is large. The load of each pair of teeth is reduced, and the bearing capacity of gear is improved relatively, and the life is long;

3. Because of the contact of the surface, the force area is large and the torque of the transmission is large, which is often used in heavy machinery;

4. The minimum number of teeth allowed for helical gear is less than that of spur gear, so it is not easy to undercut;

5. Helical gear mechanism is compact, small in volume, light in weight and high in transmission precision.

Disadvantages:

1. High price;