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Leaf chains include pins and plates only and therefore are increased in strength than roller chains. They are really suitable for tasks like hoisting and pulling. Leaf chains conform to ANSI and have two varieties: AL and BL.
bentuk AL
For that use that static load is applied with little concern of wearing.
BL form
For your use that wear resistance is required considering the fact that impact load is applied.
Collection of leaf chains
Ukuran rantai dipilih sesuai dengan rumus berikut:
Ketegangan bertindak? ¨ ¢ Faktor layanan¡§Q Stres maksimum yang diperbolehkan Catatan:
one. Acting stress contains the dead bodyweight from the chain, the fat on the attachments and inertia.
two. Should the chain velocity exceeds thirty m/min, use a roller chain.
Diameter berkas gandum minimum: SD = Pitch rantai? ¨ ¢ 5
Lebar minimal di antara flensa: L = Panjang keseluruhan pin? 1.05
?If connecting pins are provided: L¡§R2L1?¨¢1.05
F.D = S.D + Greatest link plate height (H) Note:?If dimension H exceeds 25.4,
F.D = S.D + 25.four can be adopted as the minimal flange outer diameter.
Inspeksi berkala dan pedoman untuk pengganti
Make sure you carry out periodical inspection and lubrication to confirm security and prolong chain daily life. Troubles and guidelines for resolution are outlined from the following.
Issue:Circumferential wear of plate
Alternative:Exchange the chain if wear loss turns into five percent of H.
Dilema: Letakkan miring pada pelat dan kepala peniti
Opsi: Sejajarkan unit.
Challenge:Abnormal protrusion or rotation of pin head
Solution:Change the chain Lubricate and remove overload.
Challenge:Dress in elongation
Option:Change the chain when its length turns into 1.03L. Note: Put on elongation of the
rantai menurunkan daya tariknya.
Put on elongation Rantai Daun 1of 3% lowers the tensile strength by 18 percent.
The wear life of chain may be improved by lubrication. Exchange the chain.
Problem:Cracked plate (one)Crack: Through the hole of the link plate toward the end of the hyperlink plate during the course perpendicular to tension direction.
Solution:Substitute the chain with a chain of higher optimum allowable stress, or lower the load or dynamic (shock) load.
Issue:Cracked plate (2)Crack: In an oblique course against stress route.
Answer:Exchange the chain, and shield from corrosive conditions.
Masalah: Pelat rusak (dengan tegangan besar)
Answer:Replace the chain, and remove the result in of overload.
Trouble:Enlarged plate hole
Answer:Exchange the chain, and remove the lead to of overload.
Tantangan: Korosi lubang
Solution:Change the chain, and guard from corrosive situations.