ما هي أجزاء الرافعة العلوية?

الرافعات العلوية (also called bridge cranes) are indispensable in manufacturing plants, المستودعات, مواقع البناء, والموانئ, enabling safe and efficient lifting of heavy loads. To understand how these machines operate, it’s crucial to familiarize yourself with their core overhead crane parts—each component plays a vital role in ensuring stability, دقة, والسلامة. In this guide, we’ll break down the key parts of an overhead crane, their functions, and highlight trusted manufacturers like WEIHUA Group that deliver high-quality solutions for global industries.

Key Overhead Crane Parts & Their Functions

Every overhead crane is composed of interconnected parts, designed to work in harmony for lifting, يتحرك, and positioning loads. Below is a detailed breakdown of the essential overhead crane parts:

عارضة الجسر (الشعاع الرئيسي)

The bridge girder is the horizontal backbone of the overhead crane, spanning the width of the workspace (على سبيل المثال, between two runways). It supports the trolley, hoist, والحمل نفسه. Key features:

• 1. مواد: Typically made of high-strength steel (على سبيل المثال, Q355B) for durability and load-bearing capacity.
• 2. الأنواع: Single girder (for lighter loads, 1– 20 طن) or double girder (for heavier loads, 5– 500 طن) designs.
• 3. وظيفة: Distributes the load evenly across the crane’s structure, ensuring stability during movement.

نهاية الشاحنات (نهاية العربات)

Located at both ends of the bridge girder, end trucks are the “wheels” that allow the crane to travel along the runway rails. Critical components:

• 1. عجلات: Made of forged steel or polyurethane (for low-noise operations) to withstand heavy loads and frequent use.
• 2. Gearboxes & Motors: Drive the end trucks, enabling smooth horizontal movement (longitudinal travel) of the crane.
• 3. Brakes: Ensure the crane stops securely, preventing unintended movement.

عربة

The trolley is a movable unit mounted on the bridge girder, allowing lateral (side-to-side) movement. It houses the hoist and is responsible for precise positioning of the load. Key details:

• 1. Travel Mechanism: Equipped with motors, التروس, and wheels for smooth movement along the bridge’s rail.
• 2. سعة التحميل: Matches the crane’s overall capacity, with options for manual (light loads) or electric (الأحمال الثقيلة) operation.
• 3. Anti-Sway Features: Advanced trolleys include anti-sway technology to minimize load swing, improving efficiency and safety.

Hoist – The Lifting Core

The hoist is the heart of the overhead crane, responsible for raising and lowering the load. It’s mounted on the trolley and consists of:

• 1. Drum: Wraps the steel cable or chain to lift the load.
• 2. Motor: Powers the drum’s rotation (electric motors are standard for industrial use; hydraulic motors for extreme heavy loads).
• 3. Gearbox: Reduces motor speed to generate lifting torque.
• 4. السنانير: High-strength alloy steel hooks (with safety latches) to secure loads.
• 5. Brake System: Failsafe brakes to hold the load in place if power is lost.

Runway Rails & Supports

Runway rails are the tracks along which the end trucks travel, typically mounted on columns or overhead beams. Key aspects:

• 1. Rails: Made of high-carbon steel for wear resistance; precision-aligned to ensure smooth crane movement.
• 2. Supports: Columns (concrete or steel) or ceiling-mounted brackets that anchor the rails to the building structure.
• 3. Alignment: Critical for preventing crane jamming or uneven wear on end truck wheels.

نظام التحكم

The control system allows operators to manage the crane’s movements (رفع, خفض, سفر العربة, bridge travel). Common types:

• 1. Pendant Controls: Handheld devices with buttons/levers for manual operation (ideal for close-range tasks).
• 2. Radio Remote Controls: Wireless devices that let operators control the crane from a safe distance (improves visibility).
• 3. PLC & الأتمتة: Advanced systems for programmable movements (على سبيل المثال, repetitive tasks in manufacturing lines).

أجهزة السلامة

Overhead cranes are equipped with multiple safety features to protect operators, loads, and the machine itself:

• 1. Load Limiters: Prevent overloading by cutting power if the load exceeds the crane’s capacity.
• 2. Anti-Collision Systems: Detect other cranes or obstacles on the same runway, triggering alarms or automatic stops.
• 3. Emergency Stop Buttons: Instantly shut down all crane operations in case of danger.
• 4. Limit Switches: Prevent the hoist or trolley from moving beyond safe travel limits.

Choosing a Reliable Overhead Crane Manufacturer

When investing in an overhead crane, selecting a trusted manufacturer is just as important as understanding its parts. A reputable manufacturer ensures high-quality components, durable construction, والامتثال لمعايير السلامة العالمية (على سبيل المثال, ISO, م, ANSI). Here’s what to look for:

Key Qualities of Top Manufacturers

• 1. Expertise & خبرة: Manufacturers with decades of industry experience (على سبيل المثال, مجموعة ويهوا, founded in 1988) have refined their designs and production processes to meet diverse customer needs.
• 2. Customization Capabilities: The ability to tailor cranes to specific applications (على سبيل المثال, high-temperature environments, heavy-duty lifting) ensures optimal performance.
• 3. Quality Control: Strict testing of components (على سبيل المثال, سعة الحمولة, brake efficiency) guarantees reliability and safety.
• 4. الدعم العالمي: Comprehensive after-sales service, including installation, صيانة, وتوريد قطع الغيار, minimizes downtime.

Spotlight on WEIHUA Group – A Leading Overhead Crane Manufacturer

WEIHUA Group is a global leader in the design, production, and supply of overhead cranes, رافعات الرافعات, and crane accessories. With over 35 years of experience, WEIHUA has earned a reputation for excellence in:

• 1. High-Quality Components: All overhead crane parts (على سبيل المثال, bridge girders, الرافعات, أنظمة التحكم) are manufactured using premium materials and advanced technology, ensuring durability and long service life.
• 2. Global Compliance: WEIHUA cranes meet international standards (ISO 9001, م, ANSI/ASME) and are exported to over 100 بلدان, including the U.S., Mexico, البرازيل, and European nations.
• 3. Custom Solutions: WEIHUA offers tailored cranes for industries like automotive, فُولاَذ, الخدمات اللوجستية, and construction, with load capacities ranging from 0.5 طن ل 1,200 طن.
• 4. دعم بعد البيع: A global network of service centers provides installation, تمرين, صيانة, and spare parts, ensuring customers get the most out of their investment.

FAQ About Overhead Crane Parts & Manufacturers

س 1: What are the most critical overhead crane parts for safety?

Q2: How often should overhead crane parts be maintained?

س 3: Can I replace overhead crane parts with third-party components?

س 4: What is the typical lifespan of overhead crane parts?

س 5: How do I choose the right overhead crane parts for my application?

خاتمة

Understanding the overhead crane parts and their functions is key to selecting the right crane for your needs and ensuring safe, efficient operation. Each component—from the bridge girder to the control system—plays a critical role in the crane’s performance, so investing in high-quality parts from a trusted manufacturer is essential.

WEIHUA Group stands out as a reliable partner for overhead cranes, offering top-tier components, custom solutions, and global support. Whether you need a standard overhead crane or a specialized system, WEIHUA’s expertise and commitment to quality make it a top choice for businesses worldwide.

If you’re ready to invest in an overhead crane or need replacement parts, contact a reputable manufacturer to discuss your requirements and ensure you get a solution that meets your needs and exceeds safety standards.

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