For the coupling bolt itself, the main factor affecting the preload force is its own structural size. The current coupling bolt structure is designed with reference to the structural data of the earlier units at home and abroad combined with the existing manufacturing process. Due to the use of the countersunk structure, the thread size matched with the nut is limited and cannot be made too large. In addition, it is necessary to have a retreat in the bolt manufacturing process, so that the retraction of the bolt becomes a key link that restricts the pre-tightening force of the coupling bolt. Because of the large stress concentration in the bolt retreat, the pre-tightening force of the coupling bolt cannot be blindly amplified. At present, the pre-tightening force of the coupling bolt is determined by the maximum tensile stress of the bolt not exceeding 300 MPa (early 250 MPa). Obviously, in order to increase the pre-tightening force of the bolt, it is necessary to increase the minimum diameter of the bolt (at the undercut). Bolt preload force The size of the coupling bolt should have a suitable pre-tightening force, both to ensure a certain amount of pre-tightening force, but also to make the bolt strength meet the standard requirements. In order to ensure the accuracy of bolt elongation, the bolt length before pre-tightening should be measured after the bolt is installed in the wheel hole, and the position of the bolt before and after the length of the bolt should be kept consistent to minimize the measurement error. If the reaming accuracy of the bolt holes of the coupling is poor, the gap between the bolt and the hole will be too large. When the bolt tightening force is insufficient, relative rotation between the couplings occurs, resulting in an increase in vibration of the shafting.
PRODUCT NAME:Aluminum Phosphate, Aluminum Metaphosphate ,Potassium Silicate Curing Agent,Aluminum Phosphate Crystal
PRODUCT TYPE:High Temperature Materials, Binder
PRODUCT APPEARANCE:White Powder
CHEMICAL CLASS:AlPO4
CAS No．:7784-30-7.
PRODUCT APPLICATION:It can solidify potassium silicate (other name: potassium water glass) at room temperature. It is mostly used as binder and curing agent in the production of Hi-Temp Refractory Materials for kiln. It also serves as fluxing agent in the production of special glass, as binder in fabrication of ceramics or tooth, and so on.
Aluminum phosphate adhesive has excellent heat-resistance and weather-resistance, not only a widely used adhesive in refractories, it`s also an importantingredient in inorganic coatings(such as powder coating). It also used in the production of siliceous,high-aluminum,magnesian,siliconcarbide and oxides of concrete.
TECHNICAL DATA
Test Items
Technical Parameters
Appearance
White Powder
The PH Value
2-4
Residue on sieve(45um)%
≤0.5%
P2O5 %
60-70
Al2O3 %
25-35
STANDARD PACKAGING: 25kg/bag, Plastic-lined and plastic-coated woven bags or Composite paper bags.
TRANSPORT AND STORAGE
Protect against weathering and exposed under the blazing sun. Store in a cool,dry place and avoid extreme fluctuations in temperature.
Special conditions for opened packaging: Close bags after use to prevent the absorption of moisture and contamination.
Condensed Aluminum Phosphate Condensed Aluminum Phosphate,Aluminum Phosphate Binder,Aluminum Phosphate White Powder, Refractory Matter Aluminum Phosphate,Aluminum Phosphate Crystal shijiazhuang city xinsheng chemical co.,ltd , https://www.xsphos.com