How to assemble the plum coupling?

The plum blossom coupling is often used in our days. It is an important part of connecting equipment. So, what is the method of the plum blossom coupling device? The following is the content of the editor. I hope it can be We have a harvest!

Plum blossom coupling device method

Plum blossom coupling device methods include: temperature difference device method, static press-in method, dynamic press-in method and hydraulic device method.Power press-in method: This method refers to the use of impact tools or machinery to complete the installation process. It is generally used in situations where the cooperation between the coupling and the shaft is transitional cooperation or small interference.The general method of hammering at the installation site is to place wooden blocks or other soft materials on the end surface of the hub as a buffer, and rely on the impact force of the hand hammer to knock in the diaphragm coupling.This method has the risk of partial damage to the coupling made of brittle materials such as cast iron, quenched steel, cast alloy, etc., so it should not be used.This method will also damage the appearance of cooperation, so it is often used for low-speed and small coupling devices.Static press-in method: This method is based on the size of the press-in force required for the installation, using clamps, jacks, manual or motorized presses. The static press-in method is generally used for tapered shaft holes.Because the static press-in method is restricted by the pressure machine, it is difficult to apply a large force when the interference is large.At the same time, the uneven small peaks on the cooperation surface between the coupling and the shaft will be cut off during the press-in process, causing the cooperation surface to be damaged.Therefore, this method is generally not used much.Temperature difference device method: use heating method to heat up the plum blossom coupling or use cooling method to make the shaft end cold and shorten, so that the tire coupling can be easily installed on the shaft.This method has more advantages than the static press-in method and the dynamic press-in method. Regarding the wheel hub made of brittle materials, the temperature difference device method is very suitable.In the thermostat method, most of the heating methods are used, and the cooling method is relatively few.There are many heating methods. Some put the wheel hub in high flash point oil for oil bath heating or welding torch baking, and some use an oven for heating. Oil bath heating and welding torch baking are often used on the installation site.The temperature that the oil bath can reach depends on the nature of the oil, and it is generally below 200°C.When other methods are used to heat the hub, the temperature of the coupling can be higher than 200°C, but from the perspective of metallography and heat treatment, the heating temperature of the plum blossom coupling cannot be increased arbitrarily, and the recrystallization temperature of steel is 430°C.If the heating temperature exceeds 430°C, it will cause changes in the internal structure of the steel, so the upper limit of the heating temperature must be less than 430°C.In order to be safe, the upper limit of the heating temperature should be 400 ℃ or less.As for the heating temperature required for the plum blossom coupling in practice, it can be calculated based on the interference value of the plum blossom coupling and the shaft cooperation and the requirements when the plum blossom coupling is heated on the shaft.Check after installation: After the diaphragm coupling is installed on the shaft, you should carefully check the straightness and coaxiality of the gear coupling and the shaft.Generally, two dial indicators are set on the end face and outer circle of the gear coupling. When the shaft is rolled by the turning car, investigate the value of the total runout (including end runout and radial runout) of the gear coupling to determine the connection. The straightness and coaxiality of the shaft and the shaft.Different speeds and different types of couplings have different requirements for full runout. After the coupling is installed on the shaft, it is necessary to make the deviation of the full runout of the coupling within the range of public service required by the plan. This is the gear One of the primary quality requirements of the type coupling device.There are many reasons why the total runout value of the gear coupling does not meet the requirements, and the first may be the error formed by the processing.Regarding the field device, the coupling and the shaft are out of axis due to the improper device of the key.The correct device of the key should make the two sides of the key closely fit the wall of the keyway. Generally, use the coloring method to check when the device is installed. If the cooperation is not good, it can be corrected with a file or a spatula to meet the requirements.There is generally a gap at the top of the key, about 0.1-0.2mm.High-speed rotating machinery requires a high degree of coaxiality between the coupling and the shaft. A single key connection cannot obtain a high coaxiality, and a double key connection or a spline connection can improve the coaxiality of the two.

Plum blossom coupling selects high-density cast steel raw material grade requirements

Plum blossom flexible couplings are mainly made of cast special steel.The alloy cast steel refined for special needs has a wide variety of varieties, and generally contains one or more high amount of alloying elements to achieve a certain special function.

Plum blossom flexible couplings are mainly made of cast special steel.The alloy cast steel refined for the special needs of habit is of a wide variety, and generally contains one or more high amount of alloying elements to achieve a certain special function.For example, high manganese steel containing 11% to 14% manganese is capable of impact wear and is mostly used for wear-resistant parts of mining machinery and construction machinery; various stainless steels with chromium or chromium-nickel as the primary alloying element are used for corrosion or 650 Parts that operate under high temperature conditions above ℃, such as chemical valve bodies, pumps, containers, or steam turbine shells of large-capacity power stations.

The raw materials of plum coupling are generally divided into No. 35 cast steel and No. 45 cast steel. The main difference lies in the difference in density and hardness level, commonly known as the difference in steel grade.Cast steel with carbon as the primary alloying element and a few other elements.Cast low-carbon steels with carbon content less than 0.2%, cast medium-carbon steels with carbon content of 0.2% to 0.5%, and cast high-carbon steels with carbon content greater than 0.5%.With the increase of carbon content, the strength of cast carbon steel increases and the hardness improves.Cast carbon steel has high strength, plasticity and durability, and low cost. It is used in heavy machinery to make parts that accept heavy loads, such as rolling mill racks, hydraulic press bases, etc.; it is used to make heavy forces on railway vehicles. Parts that are subject to impact, such as bolsters, side frames, wheels, and couplers.

The content of the coupling is introduced above. After reading it, we should have a certain understanding of it. Interested friends can also learn more about the other information we have collected.