Polyurethane Buffers

Product Name: Polyurethane Buffers for Crane

Temperature: -35℃ to +80℃

Application scope: Crane anti-collision

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Overview

Features

Parameter

Application

Overview

Crane polyurethane buffer is a safety protection device that utilizes the high elasticity and high damping properties of polyurethane elastomers to absorb and dissipate the kinetic energy generated when a crane and its traveling mechanisms (such as trolleys and cranes) collide with the end stop, or to mitigate the impact between traveling mechanisms. It is mainly used to replace traditional rubber, spring, or hydraulic buffers, and with its excellent comprehensive performance, it has become a key component for end-stop and anti-collision protection in modern cranes, port machinery, metallurgical gantry cranes, and other heavy equipment.

Polyurethane buffers for cranes, with their superior characteristics of high efficiency, durability, maintenance-free operation, and strong adaptability, have become the standard configuration and ideal choice for safety protection of modern industrial lifting equipment. Correct selection and use of high-quality polyurethane buffers can significantly improve crane operational safety and reduce long-term operating costs.

Features

Compared to traditional rubber, spring, and hydraulic shock absorbers, polyurethane buffer for cranes are widely used in bridge cranes, gantry cranes, various port lifting equipment, and industrial cranes due to their superior characteristics of high efficiency, durability, maintenance-free operation, and strong adaptability.

Superior Cushioning Performance:

High Energy Absorption Rate: Absorbs a large amount of energy per unit volume, resulting in high cushioning efficiency. It can effectively reduce impact force by more than 50%, protecting crane structures and mechanical equipment. Smooth Deceleration: Provides a non-linear force-displacement curve, achieving a smooth transition from gentle to rigid impacts, avoiding rigid shocks.

Extra-Long Service Life:

Excellent Fatigue Resistance: Withstands millions of cycles of repeated compression and rebound, with a lifespan far exceeding that of rubber shock absorbers (typically 5-10 times longer). Excellent Abrasion and Tear Resistance: Polyurethane materials resist friction and scratching of impact surfaces.

Superior Environmental Adaptability:

Wide Temperature Range: Typically performs stably in environments ranging from -35℃ to +80℃, without becoming brittle at low temperatures and without easily deforming at high temperatures. Corrosion and Aging Resistance: Offers good resistance to rainwater, seawater, grease, ozone, and most industrial chemicals, making it suitable for harsh working conditions such as outdoor environments, ports, and metallurgical applications.

Safety and Ease of Maintenance:

Spark-Free: No mechanical sparks are generated upon impact, making it suitable for explosion-proof areas such as coal mines and petrochemical plants. Maintenance-Free: Unlike hydraulic shock absorbers, no hydraulic oil or seals need to be replenished; minimal maintenance is required after installation. Visible Wear Indicator: Some designs feature color-coded layers; when wear reaches its limit, an internal warning color is revealed for easy safety inspection.

Lightweight and Economical:

Lightweight: Approximately 1/8 the weight of steel, it is easy to install and reduces crane load. High Cost-Effectiveness: Although the unit price may be higher than rubber, its extremely long lifespan and very low maintenance costs significantly reduce the total lifespan cost.

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Parameter

Characteristics	Polyurethane buffer	Rubber shock absorber	Rubber shock absorber	Hydraulic shock absorber
Buffering efficiency	High	Low	Low	Highest
Lifespan	Very long	Short	Short	Length (Maintenance Required)
Environmental adaptability	Excellent	General (prone to aging)	General (prone to aging)	Sensitive (Oil Temperature)
Maintenance requirements	Minimally maintenance-free	Maintenance-free	Maintenance-free	Requires Regular Oil Changes and Maintenance
Cost	Medium	Low	Low	High
Features	Best overall performance	Inexpensive, simple	Inexpensive, simple	Stability, Controllable, Used for High-Speed Heavy Loads

Proper selection of polyurethane buffer for cranes is crucial for ensuring safety and performance!

1. Calculate impact energy: Based on the mass (M) of the object being buffered and its operating speed (V), perform a preliminary calculation using the formula E = (1/2) * M * V², considering a safety factor (typically 1.2-1.5).

2. Determine installation space: Measure the available installation distance and space dimensions.

3. Check interfaces: Confirm the hole spacing, hole diameter, and bolt specifications of the mounting plate.

4. Consider environmental factors: Consider the presence of extreme temperatures, chemicals, UV exposure, etc.

5. Consult a professional: It is recommended to provide the operating parameters to the manufacturer or a qualified technician for recommendations on the most suitable model and specifications.

Application

Applications of polyurethane buffers for cranes: Gantry cranes: For the end of the trolley and crane strokes. Port machinery: For collision protection of quay cranes, yard cranes, and portal cranes. Metallurgical cranes: For casting cranes, clamp cranes, etc. Tower cranes: For slewing limit switches and trolley luffing limit switches.