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Anti-aging escalator roller

An escalator and anti-aging technology, which is applied to escalators, rotating parts that resist centrifugal force, bearings, etc., can solve the problems of easy hydrolysis reaction and poor damp heat aging resistance, and achieve excellent roller performance and strong damp heat aging resistance Effect

Active Publication Date: 2020-04-21
ZHEJIANG WANLI AUTOPART PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyester TPU has better mechanical properties than polyether TPU, so polyester TPU is often used as the material of the wheel rim to adapt to the high-load working environment of the subway system. However, the polarity of the ester group in polyester TPU is strong. In a hot and humid environment, hydrolysis reactions are prone to occur, and the aging resistance to humidity and heat is poor. This shortcoming is more obvious in southern cities

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] See figure 1 Same as the prior art, the anti-aging escalator roller of this embodiment is composed of a hub 1, and a bearing 2 and a rim 3 respectively arranged on the inner and outer rings of the hub 1; wherein, the hub 1 adopts Made of aluminum alloy.

[0033] Different from the prior art, in this embodiment, the rim 3 is injection-molded with a thermoplastic elastomer newly developed for subway escalators.

[0034] The manufacturing process of the roller is as follows:

[0035] (1) Preparation of thermoplastic elastomer

[0036] The material formula of the thermoplastic elastomer in this embodiment is composed of a main material and an auxiliary material. In parts by weight, the main material is: 100 parts of polyether TPU, 35 parts of ABS resin, 10 parts of macromolecular coupling agent; and auxiliary material: carbon 1 part of black, 0.05 part of antioxidant, 0.03 part of light stabilizer.

[0037] Among them: Polyether TPU is Bayer (Desmopan) 955U; ABS resin is TAIRILAC A...

Embodiment 2

[0045] The difference from Example 1 is that, in this example, the material formula of the thermoplastic elastomer is calculated in parts by weight. The main ingredients are: 100 parts of polyether TPU, 20 parts of ABS resin, 7 parts of macromolecular coupling agent; : 3 parts of carbon black, 0.1 part of antioxidant, 0.02 part of light stabilizer.

Embodiment 3

[0047] The difference from Example 1 is that in this example, the material formula of the thermoplastic elastomer is calculated in parts by weight. The main materials are: 100 parts of polyether TPU, 30 parts of ABS resin, 8 parts of macromolecular coupling agent; : 2 parts of carbon black, 0.07 parts of antioxidants, 0.03 parts of light stabilizers.

[0048] The anti-aging escalator rollers prepared in Examples 1-3 were tested in accordance with the China Elevator Association standard T / CEA 301-2019 "Technical Specifications for Escalators for Metro". The results show that the rollers of the present invention comply with T / CEA 301- 2019 requirements, and excellent performance.

[0049] Table 2: Test results of Examples 1-3

[0050]

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Abstract

An anti-aging escalator roller comprises a hub (1), a bearing (2) and a wheel flange (3), wherein the bearing (2) and the wheel flange (3) are arranged on an inner ring and an outer ring of the hub (1) respectively. The wheel flange (3) is formed by injection molding of a thermoplastic elastomer. A material formula of the thermoplastic elastomer is composed of a main material and an auxiliary material. The main material comprises, by weight, 100 parts of polyether TPU, 20-35 parts of an ABS resin and 7-10 parts of a macromolecular coupling agent. The auxiliary material comprises, by weight, 1-3 parts of carbon black, 0.05-1 part of an antioxidant and 0.02-0.05 part of light stabilizer. The roller is high in damp-heat hydrolysis aging resistance performance, can adapt to a working environment of a southern urban subway system, and meanwhile, various requirements of T / CEA301-2019 are satisfied.

Description

Technical field [0001] The invention relates to an escalator step roller, in particular to an anti-aging escalator roller. Background technique [0002] Urban rail transit has become the backbone of urban transportation in our country, and subway is the main component of urban transportation. Escalators are widely used in subway systems because of their efficient transportation capacity and are important subsystems of subways. The reliability, availability, maintainability and safety (RAMS) of the subway system depend on the RAMS of each subsystem including escalators. [0003] The subway has the characteristics of large passenger flow and long peak passenger flow. The escalators used in the subway need to meet the technical requirements of these characteristics to ensure that the required RAMS level is achieved. To this end, the China Elevator Association specially formulated the industry standard T / CEA 301-2019 "Technical Specifications for Metro Escalators", which was released...

Claims

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Application Information

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IPC IPC(8): B66B23/00F16C13/00C08L75/08C08L55/02C08L51/06C08K13/02C08K3/04C08K5/053
CPCB66B23/00C08L75/08C08L2201/08C08L2205/03F16C13/006F16C2208/10F16C2208/22F16C2208/36C08L55/02C08L51/06C08K13/02C08K3/04C08K5/053
Inventor 戴建兴
Owner ZHEJIANG WANLI AUTOPART PROD
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