Product Overview
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
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
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
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
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
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
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
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
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
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 |
