JMIIJ Double Diaphragm Coupling Correctly Install Bolt Method

 

JMIIJ doubleDiaphragm couplingThe correct method of installing bolts: insert the bolt from the outside of the small hole in the flange, and then pass it into the diaphragm hole (pay attention to the direction of the diaphragm. The diaphragm is composed of many single sheets, rivets and rivet washers. The sleeves are in contact, otherwise it will affect the service life of the rivet set), and then insert the buffer sleeve, elastic washer, and tighten the nut from the outside of the large hole of the flange to ensure that the bolt does not rotate, because the bolt and The surface of the flange mating section is a very important mating section for torque transmission, and the surface integrity directly affects the performance.

The maintenance friction surfaces of the double diaphragm coupling during the service cycle form mutually inclined wedge-shaped gaps, and the lubricating oil enters and buckles out; there is sufficient relative movement speed between the two surfaces; the fluid has sufficient viscosity and the oil supply is sufficient.Focus on mastering the basic equation of fluid dynamic pressure lubrication-Reynolds equation, which is the theoretical basis of sliding bearing design. One-dimensional Reynolds equation is commonly used, in which the law of the change of oil pressure along the x direction; the dynamic viscosity of the fluid; V represents movement The surface velocity of the object; h represents the gap between any two friction surfaces.The diaphragm coupling bolt connection does not need to cut threads on the connected parts, and the use is not restricted by the connected parts, the structure is simple, and the assembly and disassembly are convenient.Double-end stud connection is used in occasions where bolts cannot be used due to structural restrictions or where a compact connection structure is desired.The screw connection does not need a nut and has a smooth exposed surface, but it is not suitable for the connection that is often disassembled, so as not to damage the threaded hole of the connected part.In the set screw connection, the set screw is selected into the threaded hole of one of the connected parts, and its end urges the surface of the other connected part or pushes into the corresponding pit to fix the mutual position of the two parts and can be transferred Not much force or torque.

The main characteristics of the diaphragm coupling:

1. The ability to compensate for the misalignment of the two axes is strong. Compared with the gear coupling, the angular displacement can be doubled, the reaction force is small during radial displacement, the flexibility is large, and some axial, radial and angular displacement are allowed .

2. It has obvious shock absorption, no noise and no wear.

3. It is suitable for working in high temperature (-80+300) and harsh environment, and can move under shock and vibration conditions.

4. High transmission efficiency, up to 99.86%.Especially suitable for medium, high speed and high power transmission.

5. Simple structure, light weight, small size, convenient assembly and disassembly.It can be assembled and disassembled without moving the machine (refers to the type with intermediate shaft) and does not need lubrication.

6. It can accurately transmit the speed without slip, and can be used for the transmission of precision machinery.

The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves.The diaphragm is fastened to the sleeve with a pin and generally will not loosen or cause backlash between the diaphragm and the sleeve.Some manufacturers provide two diaphragms, and some provide three diaphragms, with one or two rigid elements in the middle, and the two sides are connected to the shaft sleeve.The difference between the single diaphragm coupling and the double diaphragm coupling is the ability to handle various deviations. In view of the complex bending of the diaphragm, the single diaphragm coupling is not suitable for eccentricity.The double diaphragm coupling can bend in different directions at the same time to compensate for eccentricity.

The elastic element of the diaphragm coupling is a diaphragm assembly composed of a thin stainless steel diaphragm. The diaphragm usually has a waist shape, a polygonal ring shape, etc., and the precision bolts on the same distribution circle are respectively connected to the driving and driven flanges. Join.The diaphragm assembly bears the misalignment of the driving and driven flange in the form of three-dimensional deformation.