Conical rubber spring with fireproof function

Abstract

The invention discloses a conical rubber spring with a fireproof function, and relates to the field of structural design of rubber springs for bogies of railway vehicles. The conical rubber spring comprises main conical rubber, a fireproof rubber layer and an isolating layer, the isolating layer is positioned between the main conical rubber and the fireproof rubber layer, and the main conical rubber, the isolating layer and the fireproof rubber layer are made into an integral structure by means of vulcanization. The conical rubber spring with the fireproof function is manufactured on the basisof an existing rubber material, and the flame retardant requirement can be met while the conical rubber spring can bear large mechanical stress. The conical rubber spring has the advantages of beingnot prone to abrasion, high in bonding strength, long in service life and the like, the service life of the conical rubber spring body is prolonged, and manufacturing cost and later-period operation and maintenance cost of a user are saved.

Description

technical field [0001] The invention relates to the field of structural design of rubber springs for railway car bogies, in particular to a conical rubber spring with a fireproof function. Background technique [0002] The materials used in existing rail transit vehicles are generally not lower than the requirements in EN45545 fire protection level HL3 or similar standards. In order to make the conical rubber spring meet the fire protection standard requirements, the main methods are to improve the flame retardant requirements of rubber materials and to coat the rubber surface with fire resistance. Paint both ways. [0003] In order to improve the flame retardant requirements of rubber materials, it is necessary to add a large amount of flame retardants to delay the burning of rubber. The addition of flame retardants seriously reduces the yield of rubber springs, increases smoke density and smoke toxicity index, and reduces the rubber rubber. The physical and mechanical pro...

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Problems solved by technology

[0003] In order to improve the flame retardant requirements of rubber materials, it is necessary to add a large amount of flame retardants to delay the burning of rubber. The addition of flame retardants seriously reduces the yield of rubber springs, increases smoke density and smoke toxicity index, and reduces the rubber rubber. The physical and mechanical properties and fatigue life of the material, especially the creep performance, are significantly reduced, resulting in the physical and mechanical properties of the rubber spring not meeting the functional requirements of the product, and the service life cannot meet the requirements of users, which increases the post-operation and maintenance costs of the train

[0004] For the method of coating fireproof coating on the rubber surface, although the physical and mechanical properties of the conical rubber spring can be guaranteed, the coating layer is easy to wear and the bonding reliability is poor

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