What is the standard installation process and description of the coupling?

Coupling is a kind of accessory that can be used in many occupations in modern society, especially in urban sewage treatment, chemical industry, exercise and other occupations. It is very widely used.So, what is its standard device technology and clarification? Let's take a look at it together!

The standard device technology of the coupling and its explanation

Regarding the cooperation between the coupling and the shaft with corresponding gaps, the direct installation of lubricating grease can be modified after the clean cooperation appearance is cleaned up.Regarding the transitional cooperation and the cooperation that is not very large, the cooperation with special requirements (such as maintaining the installed fine parts) can choose the press-in method, but the press-in equipment is required.The operation of the thermal device of the coupling is often used in the installation of heavy equipment such as large motors, compressors and rolling mills. Because the coupling and shaft in this type of equipment are generally connected by interference cooperation.There are several methods for the installation of interference couplings: press-in device, low-temperature cooling device and hot-jacket device.The cold shrinkage device method generally uses liquid nitrogen as a cold source, and requires a certain insulation container, so it can only be selected when conditions permit.

In practice, incidents that often appear are:

1. The axis of the coupling is skewed, and the coupling can’t advance: In order to avoid such incidents, in addition to the alignment of the axis, the orientation of the coupling hole and the shaft, and the orientation of the striker, they must be correct. Also pay attention to the location of the hitting point. The top and second hits must be light. Only after entering a certain distance (about 1/3), can you hit hard.

2. Other incidents may include: the impact block pulley retreats due to the lack of tightness, the hoist chain slips down, the lack of fuel, fire, etc., all need to be paid attention to in advance, and carefully checked during the preparation and operation practice phases.

3. When fine parts such as bearings and mechanical seals have been installed on the main shaft in advance, stop strong impacts and collisions with the coupling to prevent damage or damage to the fine parts.

The method of heating the containing parts to the required temperature should be selected according to the site conditions, the size, quantity and requirements of the heated parts.The general methods of heating the coupling are: solid fuel heating, hot dip heating, oxygen-acetylene flame heating, torch heating, electric heating, etc.If conditions permit, it can be heated in special furnaces (such as flame heating furnaces, salt bath furnaces, resistance furnaces and other electric heating furnaces).When the site conditions do not permit, a simple stove can be built and heated with wood, coke and other solid fuels.If conditions permit, gas or liquid fuel can also be used for combustion.Immersion heating is generally only used for couplings with smaller dimensions (inner diameter below 100mm). The method is simple and the heating is uniform.When the oxygen-acetylene flame heating method is used to heat small parts or parts of larger parts, the method is simple, but requires more skilled skills to prevent overheating and burning the parts.Regarding large couplings, multiple oxygen-acetylene flame heating and blowtorch heating can also be used in combination, which has a good effect.Although the electric heating method is a better heating method, its application on the installation site is restricted due to the need for special equipment. However, the electric induction heating method can still be considered for selection.The electric induction heating method selected for large and medium-sized couplings at the installation site is to pass the operating frequency (50Hz), low voltage and large current through the induction coil.Under the same conditions and the same data, the current frequency f is inversely proportional to the current penetration depth δ.Now that δ is expected to be large, the intermediate frequency (500～10000Hz) and high frequency (105～106Hz) are not used, but the operating frequency (50Hz) is used.Low voltage and high current can increase the loss of alternating eddy current and hysteresis, and increase heat generation.Generally, the voltages used are 380V and 220V.

The essential principle of the heating jacket device is to heat the receiving part (hole) to increase its diameter by a cooperative interference value, and then install it into the contained part (shaft). After cooling, the machine will reach the required bonding strength.In fact, the heating expansion value must be larger than the cooperation interference value in order to ensure a smooth installation and not cause serious problems of shaft and hole jamming due to the cooling of the receiving part during the installation process.At the same time, in order to ensure a greater meshing force-bonding strength, the bonding surface of the heating sleeve device must be processed, but not too bright. Due to a certain surface roughness (usually Ra3.2), it is not affected by axial movement. After being flattened and cooled, the bonding strength of the front and back parts will be greater, and the torque that can be transmitted will also be greater.Selection of heating method

The diaphragm is fastened to the shaft sleeve with a pin, generally not loose

The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves.The diaphragm is fastened to the shaft sleeve with a pin and generally does not loosen or cause backlash between the diaphragm and the shaft sleeve.

The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves.The diaphragm is fastened to the shaft sleeve with a pin and generally does not loosen or cause backlash between the diaphragm and the shaft sleeve.Some manufacturers supply two diaphragms, and some supply three diaphragms, with one or two rigid elements in the center, and the two ends are connected to the shaft sleeve.

The characteristics of diaphragm couplings are a bit like bellows couplings. In fact, the method of torque transmission of couplings is similar.The diaphragm itself is very thin, so when the relative displacement load occurs, it is very simple to twist, so it can accept up to 1.5 degrees of error, and a lower bearing load occurs in the servo system.

The difference between single-diaphragm coupling and double-diaphragm coupling is the ability to deal with various errors. In view of its requirement for the messy twists and turns of the diaphragm, single-diaphragm couplings are not used to the pain.The dual diaphragm coupling can bend in different directions together to compensate for the migraine.

In summary, this is the content of the coupling part. If you need to know more, please pay attention to the official website!