English (UK) 
简体中文 First, the principle of speed chain technology and the core significance of selection
The multiplier chain passes through theRoller-roller diameter differenceRealisation of speed increase: When the chain is running at speed V₂, the speed of the work plate can reach V₁=V₂×(1+D/d), where D is the diameter of the roller and d is the diameter of the roller. This design enables the material conveying speed to reach the actual chain speed of2.5-3 timesHowever, selection deviations can lead to chain breakage, residual roll marks and even system paralysis. The essence of the selection system of professional manufacturers such as Yihoda is thatFinding optimal solutions between physical limits and engineering costs.
personal viewpoint: Many engineers are overly concerned with speed at the expense ofTension dynamic equilibrium. In the actual case, the failure of about 30% originated from a sudden change in the coefficient of friction in the uncalculated stagnation zone - a key contradiction hidden in the selection formula.
Second, the selection of the core three steps: from the quantification of conditions to the specifications of the lock
(i) Confirmation using boundary conditions
Four hard parameters must be strictly verified:
- Temperature adaptability: -10℃~+80℃ (low temperature needs to prevent brittle cracking, high temperature needs to be lubricated and anti-sticky)
- speed range: 5~15m/min (overspeed leads to generator overheating and resonance)
- Mechanical length: ≤15m (longer length requires segmented design, otherwise tension exceeds tolerance)
- environmental taboo: Dust abrasion/corrosive gases/high humidity (will accelerate roller failure)
(ii) Accurate calculation of load capacity
WA(kg/m)=(W₁+W₂)/PLThere are hidden traps in the formula:
- W₁ (workpiece weight) to includeDynamic Impact Coefficient(Recommendation x 1.2)
- W₂ (pallet weight) is often underestimated - aluminium pallets are on average 40% heavier than engineering plastics
- Ensure that the measured WA is less than the calibrated value when comparing with the AECL Tolerance Load Table.80%(margin of safety)
(iii) Tension checking: a core barrier against chain breakage
Tension formulaT=G/1000×{(Hw+Cw)L₁-fc+Aw-L₂-fa+(Aw+Cw)L₂-fr+1.1Cw(L₁+L₂)-fc}Middle:
- Friction coefficient selection makes the difference between success and failure: The coefficient of friction fa = 0.10 in the retention zone is 25% higher than fc = 0.08 in the transport zone.
- Final calibration.Allowable chain tension ≥ (T×K₁×K₂)/2
- K₁ (speed factor): 1.6 at 15 m/min (table 3)
- K₂ (load factor): 1.35 for WA > 90 kg/m (Table 4)
case support: Neglecting the K₂ correction in an electronics factory led to the breakage of a WCHE3 chain after 2 weeks of operation under a load of 71kg/m, resulting in a loss of more than $500,000 -...A safety margin is not a cost, it's an insurance policy.
III. Key decisions on materials and structures
(i) Paradox of choice of roller type
| Performance indicators | Nylon Roller | Steel Roller |
|---|---|---|
| allowable load | 0.27-1.03 KN/m | 1.1-4.12 KN/m |
| Applicable Scenarios | Light Electronics | Automotive parts and components |
| hidden costs | Short replacement cycle (2 years) | Requires high-frequency lubrication |
personal recommendation: When WA > 45kg/m, despite the high initial cost of steel rollers 40%, theLow Life Cycle Costs 60%--Light load selection of nylon is a pseudo-proposition and requires a comprehensive MTBF (Mean Time Between Failure) assessment.
(ii) Guidelines for avoiding pitfalls in structural design
- Necessity of biaxial tensioning: Chain droop deviation of 3.2mm/m (500% over tolerance) at 15m length with single axis tensioning.
- Return guide mandatory configuration: 8 times higher probability of chain jamming without guide (12dB noise reduction for VMH series)
- Fault-proof connector design160 sections + 80 sections modular packaging, reducing the rate of on-site assembly errors.
Advantages of product differentiation of Yiheida
- Material surface treatment: Aluminium rails with anodic oxide film thickness ≥15μm, coefficient of friction reduced to 0.06 (lower than the industry standard of 0.08)
- Lubrication technology breakthroughSpecialised lubricant adhesion between the chain plates is improved by 50% and maintenance intervals are extended to 500 hours.
- error tolerance mechanismWCHE5 is up to 1.37KN in the allowable tension table (exceeding the competitor's 10%), supporting short-time overload operation.
V. Operation and Maintenance and Life Extension Strategies
Three principles of lubrication management::
- Nylon Roller: Lubrication is prohibited! Grease adsorbed dust accelerates wear (cleaning with a dry cloth is sufficient)
- Steel Roller: chain plate oiling + roller wiping (to avoid oil film affecting the speed increase ratio)
- Extreme environments:: Conversion to synthetic hydrocarbon lubricants (viscosity index >120) below -5°C
Tension self-test method::
- Finger pressure on the middle point of the chain, sagging amount ≤ 2% pitch is qualified (Example: 25.4mm pitch sagging ≤ 0.5mm)
- Adjustment of time interval in case of overrunUnilateral ≤1/4 turnAvoid overstressing
VI. Selection error cases and corrections
Typical mistakes: A medical equipment factory uses WCHE4 chains to transport 50kg/m loads:
- miscalculation point: Length of L₂ detention area not accounted for (30% of total length), actual fa = 0.10 uncorrected
- result: T measured = 0.95KN > 0.88KN permissible value, chain plate cracked after 3 months
- revised programme: Split line body is 2×7.5m section, tension reduced to 0.79KN
VII. Future directions of technological evolution
- Intelligent Sensor Integration: Embedded pressure sensor in EHEDA guideway to monitor tension fluctuation in real time (error <±5%).
- Composite RollerCarbon fibre + PEEK solution tested to a target load of 5KN/m without lubrication.
- Digital Twin Selection Platform: Input parameters to automatically generate 3D models and stress maps, reducing the risk of manual calculations.
Exclusive data:: Industry report 2023 shows that correct selection can extend the life of a doubler chain from 1.5 years to 6 years -Selection is not just a purchasing behaviour, it is an investment in productivity.
Self-question and answer: Yiheida speed chain selection core four questions
Q1: What is the most neglected parameter in selection?
L₂ retention zone length and fa friction coefficient--Most formulas apply fc values directly, resulting in tension calculation deviations of up to 181 TP3T.
Q2: Why do I need steel rollers even for light duty lines?
The nylon roller load is sufficient butStatic build-up can penetrate PCBs-Electronics industry requires steel rollers + conductive wheels for grounding.
Q3: Can I force it to be used in -15℃ environment?
Customisation requiredLow temperature modified chain plate(Add nickel alloy), ordinary chain plate -10 ℃ when the impact toughness drop 70%.
Q4：How to reduce the cost of 20% selection?
Single chain design for WA≤30kg/m.(non-standard double chain), but the main wheel torque needs to be calibrated for overload.
