What is the difference between diaphragm coupling and gear coupling?

Couplings are often seen in life, but do you know what it is? It is understood that the coupling is an important accessory in the pump valve system, so there is a difference between the diaphragm coupling and the gear coupling What's the difference? The following is the content brought about by the editor, I hope that we can get something!

The development of the steel industry directly affects the price change of the coupling

Couplings are increasingly used in machinery controlled by a servo system.In these categories, the coupling is different from the general manufacturing machinery in that it must be required to have a high follow-up line for the output relative to the input.

Recently, couplings have been increasingly used in precision machinery controlled by a servo system, such as machine tools and semiconductor manufacturing machinery.In these categories, different from general manufacturing machinery, the coupling must require its output to have a high followability relative to the input.

Especially when it is used on machine tools that require high-frequency forward and reverse rotation, high-precision positioning, and high-speed rotation of 20000r/min or more, the coupling must have high rigidity, and it must also have the ability to withstand repeated changes in the load. High flexibility and fatigue limit ability, to get used to high-speed work.Therefore, the coupling originally had to have high torque rigidity, zero reversal gap, elastic body to compensate for the radial, axial, and angular errors of the two shafts in the transmission process, and the characteristics of clockwise and counterclockwise reversal. Equivalent features.

In the past, people only considered the coupling as a mechanical part. However, with the diversification of the use of mechanical equipment using the coupling, in order to achieve higher performance, the understanding of the coupling has now been improved from a The simple mechanical parts are transformed into important mechanical elements that can influence the function of the entire mechanical system.

Therefore, it is becoming more and more difficult to meet the requirements of users by relying on the individual product development of the coupling manufacturers.Now, it has become a trend that users and manufacturers work together to jointly develop couplings that meet the requirements of the mechanical system.

Although the steel industry is currently suffering from professional dilemmas, the steel industry will continue to develop in the future. Not only the Chinese people value this occupation, but also foreigners.In the future, raw material prices will stabilize, capacity screening will continue, and most importantly, steel demand will continue to increase.

The main point now is that iron and steel enterprises are growing faster than private enterprises, and medium-sized enterprises in particular are now increasing production.Small enterprises below two million tons are down. The previous policy basically did not take into account the status of private enterprises. They all started from the perspective of state-owned steel enterprises. But now state-owned enterprises are fighting for output value, and the problem of system mechanism is the future. Career development is a big obstacle, and many occupations have this problem.

Imports and exports in the first two months of this year increased by 2.4% year-on-year. This year’s export orders are exceptionally good, but whether it can export more than XNUMX million tons of steel like the previous year has yet to be investigated. Now steel import prices are rising, but exports Is falling.We must encourage us to go global, but the policy of export tax rebates does not in itself encourage exports.Another obstacle is transaction protection measures, which is a lot of pressure.

The selection of coupling materials is generally related to steel. The price fluctuation of steel directly affects the price of the coupling, so the price of the coupling will change with the change of the steel.

The difference between diaphragm coupling and gear coupling

Diaphragm couplings do not have radial clearance problems, so the potential imbalance is low.

Compared with gear couplings, diaphragm couplings have the following advantages:

· The diaphragm coupling does not have radial clearance problems, so the potential imbalance is low. · Diaphragm couplings generally do not require any protection or inspection within five years, and their service life is extremely long.Regarding gear couplings, the manufacturer recommends that users check, organize and re-smooth them every 12-18 months. · The diaphragm coupling eliminates the problem of "deadlock" and shaft cracking. · The diaphragm coupling reduces the friction between the hub and the shaft. · The diaphragm coupling significantly reduces the force on the connected equipment.The sliding force generated by the gear coupling is an element of torque.The deformation force of the disc or diaphragm coupling is attributed to the elastic force and has nothing to do with the torque.The tortuous force of the diaphragm coupling on the equipment bearing is about 40% of that of the gear coupling, and the resulting axial force is about 10% of that of the gear coupling.The company sometimes considers the life span of mechanical bearings when calculating the rate of return on investment.Question: The price of diaphragm couplings is generally higher than gear couplings and couplings that require smoothness, and original equipment manufacturers initially supported these couplings.Why should you consider changing? Answer: Now, the cost of high-performance gear couplings is actually higher than that of disc or diaphragm couplings.Gear couplings require a lot of manufacturing processes and therefore consume a lot of manpower.In addition, the protection cost of gear couplings (timing smoothing, checking and adding lubricating grease from scratch, etc.) is much higher than that of diaphragm couplings.Although OEMs initially supported the need for smooth gear couplings, OEMs are now planning and supporting diaphragm couplings to replace gear couplings.In today's turbomachinery, more than 95% of new applications use diaphragm flexible element couplings.

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