Buffer Series

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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
P+Q (kg)	Trip	Specifications	Rated Speed	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
500-3000	96	100x120	≤1.0m/s	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
1000-4000	160	130x200	≤1.0m/s	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