عجلة الرافعة العلوية

Overhead crane wheels are responsible for bearing the full load of the crane and the lifted materials, while simultaneously facilitating smooth and precise longitudinal travel along the runway. Engineered for extreme durability and reliability, these wheels are a fundamental part of ensuring the safety, كفاءة, and longevity of your material handling operations. They are typically mounted on wheel forks or end trucks and are driven by motors or move freely as idler wheels.

الميزات الرئيسية & فوائد

• 1. Superior Material & Hardness: Manufactured from high-grade forged or alloy steel (such as 1045, 4140, 65MN), our wheels undergo precise heat treatment (flame or induction hardening) to achieve a high surface hardness (typically HRC 55-60). This ensures exceptional resistance to wear, تشوه, and flattening under heavy loads.
• 2. Precision Machining: Each wheel is machined to tight tolerances, guaranteeing a perfect profile (double-flange, single-flange, or flangeless) and a smooth running surface. This minimizes rolling resistance, reduces energy consumption, and prevents derailment.
• 3. Robust Bearing Seats: The bore is precision-machined to provide a perfect fit for bearings, ensuring optimal power transmission, smooth rotation, and extended service life for both the wheel and the bearing assembly.
• 4. تعزيز المتانة: The hardened tread and flange significantly increase the wheel’s service life, reducing downtime and maintenance costs. The tough core material maintains toughness to withstand impact loads without cracking.
• 5. مجموعة واسعة من التطبيقات: Available in various sizes, profiles, and materials to suit different crane types (single girder, double girder), duty cycles (from CMAA Class A to Class E), and operating environments, including high-temperature or corrosive settings.

Overhead Crane Wheel Technical Parameters Table

ملحوظة: The above parameters are general. Exact specifications must be determined based on your crane’s design and operational requirements.

أصناف المنتج

We offer a comprehensive range of overhead crane wheels to meet diverse needs.

By Wheel Profile:

• 1. Double Flange Wheels: The most common type, with flanges on both sides to securely guide the crane along the runway rail, preventing derailment.

• 2. Single Flange Wheels: Used in specific configurations where one side of the wheel runs against a guide, often found in specialized crane systems or to compensate for tracking issues.

• 3. Flangeless (Plain) Wheels: Used in conjunction with separate horizontal guide rollers. Common in very heavy-duty applications like furnace charging cranes or where lateral forces are high.

B. By Drive Type:

• 1. Drive Wheels: Feature a machined groove or keyway on the tread or side to engage with a drive pinion or are directly driven via a shaft. They provide the motive force for the crane.

• 2. Idler (Free-Running) Wheels: These wheels are not driven and rotate freely, supporting the load and following the movement of the driven wheels.

C. By Material & طلب:

• 1. Standard Steel Wheels: For general indoor industrial use.

• 2. Alloy Steel Wheels: For heavy-duty, high-cycle applications (على سبيل المثال, 42CRMO).

• 3. Heat-Treated Steel Wheels: For extreme duty cycles and maximum wear resistance.

• 4. Stainless Steel Wheels: For corrosive environments (food processing, chemical plants).

• 5. Forged Steel Wheels: For the most demanding applications requiring superior strength and impact resistance.

Overhead Crane Wheel Manufacturing Process

التعليمات: عجلة الرافعة العلوية

س 1: How do I know when my overhead crane wheels need to be replaced?

أ: Regular inspection is key. Common signs include:

• 1. Visible wear: The tread becomes concave or the flange thickness is reduced beyond the manufacturer’s limit (غالباً 10-15% of original size).
• 2. Flat Spots: Caused by excessive braking or wheels locking up.
• 3. Cracks or Chipping: On the tread or flange.
• 4. Uneven Wear: Indicating misalignment of the crane bridge or runway.
• 5. Abnormal Noises: Grinding or screeching sounds during travel.

Q2: Can I replace just one worn wheel?

أ: It is highly recommended to replace wheels in sets on the same end truck or, ideally, across the entire crane bridge. Replacing only one wheel can lead to uneven load distribution, causing rapid and uneven wear on the new wheel and potential alignment issues.

س 3: What is the difference between flame hardening and induction hardening?

أ: Both processes harden the wheel’s surface.

• 1. Flame Hardening: Uses oxy-fuel torches. It is effective but can be less uniform.
• 2. Induction Hardening: Uses an electromagnetic field to heat the surface. It provides a more precise, consistent, and controllable hardened layer with less risk of distortion. Induction hardening is generally preferred for high-performance wheels.

س 4: How important is the wheel hardness compared to the rail hardness?

أ: It is crucial. Ideally, the crane wheel should be harder than the rail. A harder wheel will wear down slower, transferring the wear to the rail, which is typically longer, cheaper, and easier to replace than a wheel set. A common rule is for the wheel to be 20-40 HB points harder than the rail.

س 5: Do you provide custom-made wheels?

أ: Yes, we specialize in providing custom solutions. We can manufacture wheels to your specific drawings, including non-standard diameters, widths, bore sizes, and special heat treatment requirements. Please provide your technical specifications for a quotation.

Q6: What information do I need to provide to order the correct replacement wheel?

أ: To ensure a perfect fit, please provide:

• 1. Wheel Outside Diameter and Tread Width.

• 2. Bore Diameter and Keyway Dimensions (if applicable).

• 3. Flange Height and Profile.

• 4. Overall Width of the Wheel.

• 5. Photos of the old wheel and the assembly can also be very helpful.