The performance standards and high-efficiency load-carrying capacity of plum couplings are reflected in the actual application

Published: 2018-08-07

Plum couplingSimple structure, no lubrication, convenient maintenance, easy inspection, maintenance-free, and can run continuously for a long time.Polyurethane elastic elements are resistant to oil, have large carrying capacity, and have a long service life.Work stably, with good vibration damping, buffering and electrical insulation properties.It has large axial, radial and angular compensation capabilities.The structure is simple, the radial dimension is small, the weight is light, and the moment of inertia is small. It is suitable for medium and high speed occasions.

梅花联轴器主要适用于起动频繁、正反转、中高速、中等扭矩和要求高性的工作场合，例如：冶金、矿山、石油、化工、起重、运输、轻工、纺织、水泵、风机等。工作环境温度-35℃～+80℃，传递公称扭矩25～12500Nm，许用转速1500～15300r/min。

Under normal circumstances, the height of the claws of the half coupling is the same, but the length of the claws is slightly different. If we use the top of the short claws as the benchmark at this time, it will cause the long claws to match the gap too small or even It cannot be assembled. Therefore, when the length of the claws is the same, adjust the end gap based on the long claws.

The added motor half coupling may cause the output shaft of the motor to protrude relatively. During assembly, the half coupling of the reducer is limited by the output shaft of the motor, causing the coupling to be unable to be assembled to the predetermined end with a gap.Before installation, check whether the prime mover and working machine shafts are concentric, whether there are wrapping paper and scratches on the surfaces of the two shafts, whether there are debris in the inner holes of the two half couplings of the plum coupling, and whether the edges of the inner holes are bumped. Injuries; if any, the shafts and half couplings should be cleaned up, and the bruises should be treated with a fine file.Then check whether the inner hole diameter and length of the two half couplings are consistent with the diameter and shaft elongation of the prime mover and working machine.In general selection, it is better to let the length of the prime mover and the working machine end half coupling be less than the shaft extension of 2-2mm.In order to facilitate the installation, the two half couplings are placed in a 10-30 incubator or oil tank for preheating, so that the inner hole size increases and it is easy to install.After installation, the shaft head should not protrude from the section of the half coupling, and it is better to be flush.Detect the distance between the two halves of the coupling: the plum blossom coupling has torsional elasticity, shock absorption, maintenance-free, compact design, and low inertia.The structure of the plum blossom coupling is simple, the number of parts is small, the radial dimension is small, and there is no need for lubrication; the elastic element has a high pressure bearing capacity.Except for the double-flange plum blossom coupling, the half coupling must be moved axially when replacing the wearing parts plum blossom elastic parts.This coupling has the ability to compensate for the relative offset of the two shafts.The cross section of the plum petals of the plum coupling is usually circular, which can improve the uniformity of the load distribution on the working surface, and can transmit a larger torque, but the elasticity is slightly reduced.It can also be made into a rectangle or fan shape.When the coupling is working, the plum petals are squeezed, and only half of the plum petals carry work.

The plum coupling has a good balance performance and is suitable for high-speed applications (speed up to 30000 rpm), but it cannot handle large deviations, especially axial deviations.Larger eccentricity and deflection angle will produce a larger bearing load than other servo couplings.Another value of concern is the failure of the plum blossom coupling.Once the quincunx elastic spacer is damaged or fails, the torque transmission will not be interrupted, and the metal claws of the two shaft sleeves mesh together to continue to transmit the torque, which is likely to cause problems in the system.Choosing the appropriate plum blossom elastic spacer material according to the actual application is a major advantage of this coupling. The different hardness and temperature tolerance allow customers to choose the appropriate material to meet the performance standards of the actual application.

The plum blossom coupling is the intermediate connecting part of each movement mechanism. It has a direct impact on the normal operation of each movement mechanism. Therefore, when using it, pay attention to:

1. The plum blossom coupling is not allowed to have more than the specified shaft center line skew and radial displacement, so as not to affect its transmission performance.

2. The bolts of the plum coupling must not be loose or damaged.

3. Plum blossom couplings and slider couplings should be lubricated regularly, and grease should be added once every 2 to 3 months to avoid severe wear of the gear teeth and serious consequences.

4. The contact length of the tooth width of the plum coupling shall not be less than 70%; the axial movement shall not be greater than 5mm.

5. Torx couplings are not allowed to have cracks, if there are cracks, they need to be replaced (it can be knocked with a small hammer, judged by the sound).

6. The keys of the plum blossom coupling should fit tightly and must not be loosened.

7. The tooth thickness of the plum blossom coupling is worn. When the lifting mechanism exceeds 15% of the original tooth thickness, when the operating mechanism exceeds 25%, it should be scrapped. If there is a broken tooth, it should also be scrapped.

8. If the elastic ring of the plum blossom coupling and the sealing ring of the gear coupling are damaged and aging, please pay attention to timely replacement.

Plum coupling has the following characteristics:

(1) The plum blossom coupling works stably, with good vibration damping, buffering and electrical insulation properties.

(2) Simple structure, small radial size, light weight, small moment of inertia, suitable for medium and high speed occasions.

(3) It has large axial, radial and angular compensation capabilities.

(4) Polyurethane elastic elements are resistant to oil, have large carrying capacity and long service life.

(5) The coupling does not need to be lubricated, the maintenance workload is small, and it can run continuously for a long time.

An important manifestation of the load-bearing capacity of the plum coupling

(1) The structure of the plum blossom coupling is simple, the number of parts is small, the radial dimension is small, and there is no need for lubrication; the elastic element has a high load bearing capacity under pressure.Except for the double-flange plum blossom coupling, the half coupling must be moved axially when replacing the wearing parts plum blossom elastic parts.This coupling has the ability to compensate for the relative offset of the two shafts.

(2) The cross section of the plum petals of the plum blossom coupling is usually circular, which can improve the uniformity of the load distribution on the working surface, and can transmit larger torque, but the elasticity is slightly reduced.It can also be made into a rectangle or fan shape.When the coupling is working, the plum petals are squeezed, and only half of the plum petals carry work.

(3) The plum blossom coupling has two structural forms: casting material and steel material.Steel material is suitable for high-load drive units, such as rolling mills, elevators, spline bushings, etc.Torque range: 5Nm--35000Nm.

(4) Flower-shaped elastic parts generally use polyester polyurethane (hardness code a), or cast nylon (hardness code b), the former has a lower load-bearing capacity than the latter.The semi-coupling and flange connection materials are 45 steel or ZG70-500. In the chemical industry, this phenolic resin is often used to make semi-couplings.

(5) The plum blossom coupling has torsional elasticity, shock absorption, maintenance-free, compact design and low inertia.