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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
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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
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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
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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
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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
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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
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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
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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
- Diameter: 40mm
- Height: 30mm
- Quantity: 115
16 units of rubber crane buffers shipped to UAE
- Diameter: 125mm
- Height: 125mm
- Quantity: 4