Elevator safety device

A safety device, elevator technology, used in transportation and packaging, friction linings, elevators, etc., can solve problems such as no longer application, whisker and platelet toxicity, and achieve high fracture strength.

Inactive Publication Date: 2002-04-10
INVENTIO AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Whiskers and lamellae are currently no longer used due to their toxicity and their use is banned in most countries

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The friction body consists of a matrix comprising 95% by weight of silicon carbide and carbon and a fiber reinforcement consisting of a laminate of carbon fiber fabrics with fiber orientations of 0° and 90°. The carbon fiber is composed of HTA fiber No. 3000 produced by Akzo and Wuppertal.

[0039] Such a friction element 1 is shown in FIG. 1 . The dimensions of the friction member are 120 mm in length, 40 mm in width and 8 mm in thickness. The two fixing holes 3 are located on the center line 2 , and the axes of the holes are perpendicular to the friction surface 4 . The axes of the two holes are each 25 mm from the narrow side of the friction element 1 . The fastening holes have a stepped profile so that fastening screws or rivets can be embedded in a wide diameter section so that they do not protrude beyond the friction surface 4 .

[0040] The manufacturing process of the friction member shown in Figure 1 includes the following steps:

[0041] First, carbon fibe...

Embodiment 2

[0053] The friction part consists of a matrix consisting mainly of silicon carbide and carbon and a fiber reinforcement (HTA fiber from Akzo, Wuppertal company No. 3000) consisting of a laminate of fiber fabrics with fiber orientations of 0° and 90° °. In order to improve the wear resistance and the coefficient of friction, the ceramic content will be greatly increased in the section close to the friction surface compared to the core section. In order to avoid deformation, the friction lining has a symmetrical structure based on the center plane of the friction thickness.

[0054] Same as Embodiment 1, the manufacturing process of the friction lining is also divided into three steps:

[0055] First, a carbon fiber reinforced plastic raw material with a fiber volume content of about 60% is prepared by resin injection molding; before impregnating the resin, inert conditions at different temperatures of 600°C, 750°C, 900°C and 1100°C Next, each carbon fiber fabric layer was cur...

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Abstract

The present invention relates to a safety device for lifts with at least one lift guide rail, securely installed in the lift shaft and a brake part, comprising at least one friction element with at least one friction surface that can be pressed against the guide rail to decelerate the lift, with the friction material of the friction element comprising a fibre-reinforced, ceramic composite material, containing silicon carbide and carbon fibres as reinforcing component, with the safety device being characterised by the composite material containing a matrix of silicon car- bide and carbon and the reinforcing component being formed exclusively from carbon fibres with a minimum length of 10 mm and the volume content of carbon fibres in the friction element lying between 30% and 70%.

Description

field of invention [0001] The invention relates to a safety device for an elevator, which has at least one elevator guide rail fixedly installed in the elevator shaft and a braking part comprising at least one braking element with at least one friction surface, which can be pressed against the guide rail in order to brake the elevator, the brake part has a friction material consisting of a fiber-reinforced ceramic composite material containing silicon carbide and carbon fibers as reinforcing components , the present invention also relates to a method of making such a friction member. Background technique [0002] A safety device of this type or a brake pad for an emergency braking device is described in US-A-5.964.320. [0003] Manned elevators such as apartment units and observation towers must have a separate emergency brake or emergency braking device in addition to the operating brake. In an emergency, that is, when the speed of the elevator car exceeds the specified m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16D69/02B66B5/22
CPCF16D69/02F16D69/023
Inventor 瓦尔特·克伦克尔拉尔夫·伦茨
Owner INVENTIO AG
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