Crane Buffers

Buffer is configured in the crane metal structure at the end of a safety device, has to absorb the kinetic energy of the collision of the operating mechanism to slow down the impact of the role. The most commonly used buffers for cranes are polyurethane buffer, hydraulic buffer, spring buffer and rubber buffer. In addition composite buffer, damping buffer and gas-hydraulic buffer can also be used for cranes.

Polyurethane Buffer

polyurethane buffer
  • Working temperature: -20~60℃
  • Applicable buffer type: high and low frequency impacts
  • Recommended service life: 1 year
  • Application: Overhead and gantry cranes, crane trolleys, slow-speed elevators, etc.

Advantages

  • Large energy absorption, good cushioning performance. The cushioning process can consume 40% of the energy, 60% of the energy is stored and finally released, moderate rebound, compressibility and good resilience.
  •  Light weight
  •  Low cost work is a soft collision, no noise, no sparks, often used in explosion-proof place

Disadvantages

Not suitable for metallurgical environment, Poor resistance to ultraviolet light.

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN) weight(kg)
1 0.265 60 28 0.24
2 0.502 75 42 0.34
3 0.98 94 66 0.65
4 1.96 120 103 1.3
5 4.019 150 169 2.3
6 7.85 188 265 5
7 15.7 240 414 9.5
8 25.732 240 675 15

Hydraulic Buffer

hydraulic buffer
  • Working temperature: -20~60℃
  • Applicable buffer type: high and low frequency impacts
  • Loadable speed: <3.5m/s
  • Recommended service life: 3 years
  • Application: Can be used for heavy cranes, port machinery, elevators, etc.

Advantages

  • High suction capacity
  • Uniform buffer
  • No special requirements for use environment
  • 100% reset after unloading

Disadvantages

Overall product life is limited by spring life

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN) weight(kg)
1 4 50 80 18
2 10 70 150 40
3 25 80 315 90

Spring Buffer

spring buffer
  • Working temperature: -20~60℃
  • Applicable buffer type: high and low frequency impacts
  • Loadable speed: <2m/s
  • Recommended service life: 3 years
  • Application: Heavy duty cranes, port machinery, mining machinery

Advantages

  • High wind sand and other special working conditions, the product performance is not affected
  • High temperature resistance
  • Corrosion resistance
  • No aging failure phenomenon
  • Stable operation
  • Can adapt to the harsh environment

Disadvantages

Low energy absorption, High rebound force.

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN) weight(kg)
1 0.16 80 5 11
2 0.4 95 8 19
3 0.63 115 11 26
4 1 115 18 36

Rubber Buffer

rubber buffer
  • Applicable buffer type: high and low frequency impacts
  • Loadable speed: 0.9m/s
  • Recommended service life: 20 years
  • Application: Heavy duty cranes, port machinery, mining machinery

Advantages

  • Simple construction
  • Low cost
  • 30%~50% of kinetic energy consumption and internal friction in the buffering process, small rebound.
  • Work is soft collision, no noise, no sparks
  • Can be used in special explosion-proof places
  • High wind and sand and other special working conditions, product performance will not be affected
  • No aging failure phenomenon
  • Stable operation
  • Can adapt to the harsh environment

Disadvantages

Low energy absorption
Not suitable for metallurgical environments

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN) weight(kg)
1 0.1 22 16 0.36
2 0.63 40 50 2.13
3 2.5 63 118 6.5
4 4 80 200 12
5 10 100 300 25
6 16 112 425 34
7 20 125 500 18.2
8 25 140 630 64.8

Composite Buffer

composite buffer
  • Working temperature: -20~60℃
  • Material: polyurethane, spring, seamless steel
  • Applicable buffer type: high and low frequency impacts
  • Loadable speed: 0.9m/s
  • Suggested service life: 3 years
  • Application: Can be used for cranes and crane trolleys

Advantages

  • High energy absorption
  • UV resistant
  • Corrosion resistant
  • No aging failure
  • High impact strength
  • Stable operation
  • Adaptable to harsh environments

Disadvantages

Not resistant to high temperature
Slow rebound

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN)
1 15 140 400
2 19 150 460
3 35 150 650
4 20 80 500
5 25 100 500
6 42 120 700
7 20 240 520

Damping Buffer

damping buffer
  • Working temperature: -70~80℃
  • Material: damping fluid, seamless steel
  • Applicable buffer type: low frequency impact
  • Loadable speed: <1.5m/s
  • Recommended service life: 15 years
  • Application: Anti-collision cushioning for heavy cranes, harbor machinery and other large equipment. Can also be used in the railroad transportation industry and metallurgical industry

Advantages

  • High energy absorption
  • High (low) temperature resistance
  • Corrosion resistance
  • No aging failure
  • High impact strength
  • Stable operation
  • Adaptable to harsh environments

Disadvantages

Slow rebound

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN)
1 0.7 35 40
2 1.2 40 60
3 2.6 50 100
4 4.8 65 150
5 9.6 80 230

Gas-Hydraulic Buffer

gas hydraulic buffer
  • Material: hydraulic oil, high pressure nitrogen, seamless steel
  • Loadable speed: <3.3m/s
  • Recommended service life: 5 years
  • Application: Heavy crane, port machinery, mining machinery, elevator

Advantages

  • Large stroke
  • High energy absorption
  • Uniform cushioning
  • Loadable speed <3.3m/s
  • No special requirements for the use of the environment
  • 100% reset after unloading

Disadvantages

Large size and weight of single product

Parameters

Item buffer capacity(kJ) stroke(mm) buffering force(kN) weight(kg)
1 32 100 400 38
2 64 200 400 44
3 96 300 400 57
4 128 400 400 71
5 160 500 400 80
6 192 600 400 90
7 210 700 375 107
8 224 800 350 118
9 238 900 330 128
10 260 1000 325 139

Case

115 units of rubber crane buffers shipped to UAE

16 units of rubber crane buffers shipped to UAE

  • Diameter: 40mm
  • Height: 30mm
  • Quantity: 115
  • Diameter: 125mm
  • Height: 125mm
  • Quantity: 4

Contact Details

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