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Buffer Series

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What is an elevator buffer?


1.Elevator buffer is a device designed to stop a descending car or counterweight beyond its normal limit and to soften the force with which the elevator runs into the pit during an emergency.
2.Elevator buffer is one of the most important items of the elevator safety system.
3. Elevator buffer work to minimize the danger when there is a loss of traction capability and not enough brake distance in cases such as rope breakagel.

 

How does the elevator buffer work?

 
The cabin does not hit directly in a free fall. In this situation, the role of the buffers is to prevent the cabin from hitting hard when the cabin or counterweight is slipping toward the bottom of the shaft.
 

【Main types of elevator buffer

 

They may be of polyurethane or oil type in respect of the rated speed.
1.the elevator car speed is high, energy-consuming buffer should be used
2.the elevator car speed is low, energy-conserving buffer should be used.


What is the difference between elevator energy-consuming buffer and elevator energy-conserving buffer


1.energy-conserving buffer:
Spring (mechanical, linear) buffers : Spring buffers prevent the bottom of the cabin from crashing hard on the floor.
The spring-loaded buffers meet the kinetic energy of the car, loaded car or counterweight in a spring-loaded configuration. They are buffers of the energy storage type. Stroke distances can not be less than 65 mm.
Polyurethane (mechanical, nonlinear) buffers : As can be inferred from its name, this buffer is made of some type of elastic, cellular elastomer polyurethane. It consists of organic molecular chains that come together through its chemical structure. If more than one buffer is to be used (depending on the elevator load), these buffers must be same kind, height and placed equally on the same level.
 
2.energy-consuming buffer
Hydraulic buffers: Energy-wasting hydraulic buffer absorbs the kinetic energy of the loaded cabin or counterweight, and after impact is automatically reset when the cabin is lifted off of it. The hydraulic level of these buffers must be easily controllable. Such buffers can be used in any speed group, and must have a safety switch.
According to the standards, elevators with a speed of more than 1 mps are only allowed to use energy-efficient, hydraulic buffers.


How to install elevator buffer

 
If the buffers are securely fixed to the bottom of the car frame, there must be an area under the buffers that will form a safety zone of a minimum 70-by-100 cm, and 50 cm high.allowing space for a person in the lying-down position. Even in a fall to the bottom of the shaft, there should be space for someone to take shelter. In cases where the shaft cavity cannot meet the minimum, collapsible buffers with platform or special solutions, as cited in risk analysis reports, should be used.
 

When to inspect elevator buffer


The buffers should be inspected in the elevator shaft at intervals of six months, and the oil level should be checked in hydraulic buffers to see if any damage has occurred or if the condition has deteriorated.
 

The most important thing about elevator buffer

 
Elevator should not be used without buffer, and maintenance of buffer should be tightly monitored.
 

Elevator oil buffer  Specifications】
 

P+Q
(kg)

Rated Speed
(m/s)

Plunger Stroke
(mm)

Free Height
(mm)

a*b
(mm)

A*B
(mm)

Oil Mass
(L)

300-2500

≤1.0

100

390

150*90

180*125

0.5

700-5300

≤1.6

175

625

210*100

270*150

1.7

1000-5300

≤2.0

290

915

210*100

270*150

2.6

500-4600

≤0.63

65

350

150*100

190*160

0.45

300-2500

≤1.0

70

305

210*80

250*125

0.5

600-3000

≤1.0

80

315

150*90

200*125

0.4

600-3000

≤1.6

175

510

150*90

200*125

0.6

700-3600

≤1.75

210

600

150*90

200*125

0.8

600-2500

≤1.75

220

780

210*80

250*125

1.3

800-3800

≤2.0

275

790

210*80

250*125

1.5

820-3600

≤2.5

425

1130

150*100

190*160

2.5



 

Elevator Polyurethane buffer Specifications】


P+Q
(kg)
Trip Specifications Rated Speed lnstallation Size
B b h Φ
200-1200 65 65x80 ≤1.0m/s 95 65 4 12
200-1600 65 80x80 ≤1.0m/s 108 801 4 12
200-2000 8O 80X100 ≤1.0m/s 108 76 4 14
200-2600 100 80x128 ≤1.0m/s 108 76 4 14
500-3000 65 100x80 ≤1.0m/s 128 96 4 14
500-3000 8O 100X100 ≤1.0m/s 128 96 4 14
500-3000 96 100x120 ≤1.0m/s 128 96 4 14
165 130 6 14
1000-4000 136 130X160 ≤1.0m/s 160 126 4 14
1000-4000 160 130x200 ≤1.0m/s 160 126 4 14
165 130 6 14
500-5500 150 150X180 ≤1.0m/s 200 156 4 18
1800-6500 160 160x200 ≤1.0m/s 200 156 4 18
2000-7000 160 200x200 ≤1.0m/s 246 196 4 16
4000-9000 160 250x200 ≤1.0m/s 320 250 4 18
1800-4500 100 160x125 ≤1.0m/s 200 160 10 18
650-3500 65 165x80 ≤1.0m/s 190 150 4 18
1000-5000 65 220x80 ≤1.0m/s 260 200 4 18
500-3400 153 100X180 ≤1.0m/s 128 96 4 14