CN202012026U

CN202012026U - TPEE backing plate

Info

Publication number: CN202012026U
Application number: CN2011200265273U
Authority: CN
Inventors: 李胜; 贡健; 彭汛; 尤连兴
Original assignee: Jiangyin Haida Rubber and Plastic Co Ltd
Current assignee: Jiangyin Haida Rubber and Plastic Co Ltd
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-10-19
Anticipated expiration: 2021-01-27

Abstract

The utility model relates to a TPEE (Thermoplastic Polyester Elastomer) backing plate, characterized in that the material of a backing plate employs polyester elastomer of America Dupont company; the backing plate forms an anomaly body on a whole body of upper and lower surfaces of a noumenon; the anomaly body is a groove (1) or a column; the groove bottom (11) of the groove (1) is arc-shaped and is in smooth connection with groove walls; the groove depth of the groove is 5-8 mm, the groove width is 14-18mm and the distance between grooves is 30-35mm; the arrangement of the column is transverse and vertical orthogonality. The TPEE backing plate of the utility model has the advantages of dispersed and uniform load, small compression, permanent deformation and long time resilience.

Description

The thermoplastic polyester elastomer backing plate

Technical field

The utility model relates to a kind of thermoplastic polyester elastomer (TPEE) backing plate.Be mainly used in the track (sleeper) of railway vibration that produces when being used to weaken vehicle and advancing and noise etc.

Background technology

In the track (sleeper) of railway, vibrationproof parts such as vibration that produces when being used to weaken vehicle and advancing and noise, employing be pallet for railway.This pallet for railway comprises the railway rail pad that inserts between rail and the sleeper, is laid on the plate lower bolster under the sleeper, is laid on the track plate vibrationproof part etc. under the slab track.The constituent material of this pallet for railway not only requires: (1) is fit to the low spring constant of service condition; (2) show good vibrationproof performance and shock-absorbing capacity requirement, but also require good compression characteristic (particularly little remaining distortion, low hysteresis loss); (3) high mechanical properties; (4) good resilience; (5) good fatigue durability; (6) Kuan Guang serviceability temperature.Up to now, what be used for that the material of pallet for railway uses is rubber, however rubber system pallet for railway, especially spring constant is low, and the rubber system pallet for railway of quality softness is not the goods that possess sufficient durability.And be to reduce spring constant, when rubber was implemented groove processing etc. and constituted pallet for railway, it was inhomogeneous to cause the load of this pallet for railway to disperse, and the groove of concentrating at stress produces be full of cracks etc., causes durability further to reduce; Because the intrinsic shortcoming of elastomeric material, bigger as the energy storage of compressive deformation process, make backing plate self give birth to heat, thereby it is aging to quicken it, application life is shorter: the resilience of rubber mat plate is under the effect of compressive stress, promptly in the course of the work, increase in time and reducing gradually, the speed that rebound degree reduces increases in time and increases.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of load of backing plate to be uniformly dispersed, little compression set, the permanent thermoplastic polyester elastomer backing plate of resilience.

The purpose of this utility model is achieved in that a kind of thermoplastic polyester elastomer backing plate, it is characterized in that: a polyester elastomer trade mark of the TPEE material of the Hytrel(E.I.Du Pont Company of described backing material employing du pont company), backing plate is on body, soffit is formed with an irregular body, this irregular body is a groove, or column, the bottom land of groove presents arc, being slyness with cell wall joins, groove depth 5 ~ the 8mm of groove, groove width 14 ~ 18mm, inter-alveolar distance 30 ~ 35mm, column be arranged as horizontal and vertical orthogonal arrangement.

Thermoplastic polyester elastomer (TPEE) claim lactoprene again, is the line-type block polymer that a class has the hard section of PBT polyester and aliphatic polyester or polyester soft segment.Thermoplastic polyester elastomer (TPEE) has the workability of rubber excellent elasticity and thermoplastic concurrently, and soft durometer is adjustable, and design is free.

The beneficial effects of the utility model are:

The utility model utilizes the trade mark of TPEE material of the Hytrel(E.I.Du Pont Company of du pont company) polyester elastomer, constitute pallet for railway, because of it relatively is easy to by regulating the ratio between the hard soft segment, its elasticity and hardness can be between rubber and plastics, come control spring constant better, provide balancedly to satisfy and be suitable for vibrationproof, the low spring constant of shock-absorbing capacity, good compression characteristic, high mechanical properties, little compression set, good fatigue durability, low water absorption.

Single on product price, the polyester elastomer backing plate is higher than rubber mat plate, but from application life, reduces and safeguard and maintenance, and recently saying of comprehensive sexual valence such as reduce that sleeper breaks uses the polyester elastomer backing plate that high economic benefit is still arranged; With other vibration insulating system such as gumshoe, clone's egg, the spring comparison of floating, advantage such as it is simple to construct in addition embodies high cost performance.The Hytrel elastomeric material can reclaim after using, and has characteristic of environmental protection and belongs to green product.

Description of drawings

The Facad structure schematic diagram of the thermoplastic polyester elastomer backing plate that Fig. 1 relates to for the utility model.

Fig. 2 is the lateral view of Fig. 1.

Reference numeral among the figure:

Groove 1, bottom land 11, cell wall 12, groove depth H, groove width B, inter-alveolar distance s.

The specific embodiment

Referring to Fig. 1 and Fig. 2, the Facad structure schematic diagram of the thermoplastic polyester elastomer backing plate that Fig. 1 relates to for the utility model.Fig. 2 is the lateral view of Fig. 1.By Fig. 1 and Fig. 2 as can be seen, the utility model thermoplastic polyester elastomer backing plate, described backing material adopts the Hytrel polyester elastomer of du pont company, backing plate is on body, soffit is formed with an irregular body, and this irregular body is a groove, or column, the bottom land of groove presents arc, be slyness with cell wall and join, the groove depth 5 ~ 8mm of groove, groove width 14 ~ 18mm, inter-alveolar distance 30 ~ 35mm, column be arranged as horizontal and vertical orthogonal arrangement.

The utility model has adopted on the basis of finite element analysis, at first carried out the interface geometry design of product, adopt compression and shear strain as much as possible, avoid bearing as far as possible and stretch and flexural deformation, its structure can make backing plate provide high screen resilience simultaneously by shearing deformation and compressive deformation, to reach best damping effect.

Compare with other thermoplastic elastomer (TPE), under low strained condition, other thermoplastic elastic height of the modular ratio same rigidity of TPEE; When being important design condition with modulus, the cross-sectional area with TPEE can dwindle goods reduces material usage.

Because polyester elastomer has following characteristics: the one, the physics of giving prominence to, chemical property: have surprising screen resilience, outstanding toughness and intensity.To creep, impact and the high drag of flex fatigue tool.Simultaneously, polyester elastomer can be resisted non-polar solven (oil, fuel oil, hydraulic oil), the polar solvent under the room temperature (ethylene glycol, HMW ethanol, weak acid and weak base).The 2nd, wide in range Applicable temperature scope: under the environment of low temperature-40 ℃, still can keep excellent elasticity, brittleness temperature point can reach more than-70 ℃, is that other elastomeric material is incomparable; During 150 ℃ of high temperature, also can keep fabulous mechanical performance, this is very rare in elastomeric material.

The design's backing plate utilizes the Hytrel polyester elastomer, adopt Shooting Technique to make the high resiliency backing plate, groove depth by this backing plate surface, groove width and inter-alveolar distance, variations such as the arrangement of column can be made into the high resiliency backing plate of different quiet, dynamic stiffness, and that quiet/dynamic stiffenss ratio and damping effect and hardness can guarantee is constant.

Test shows that the quiet rigidity of dynamic stiffenss ratio of the polyester elastomer backing plate of new structure improves 35%-40%, and the quiet rigidity of General Purpose Rubber dynamic stiffenss ratio has improved 70%-80%, and the former effectiveness in vibration suppression is more obvious.Through the detection of the corresponding testing equipment of my MTS of company dynamic fatigue machine and institute of iron section, the spring constant of the polyester elastic pad plate of new structure has reached the requirement of desired design.

The utility model polyester backing plate and General Purpose Rubber backing plate performance are relatively

Under the effect of dynamic force, mainly provide high screen resilience by flexural deformations, moving/quiet ratio of rigidity is little, and the elasticity resume speed is very fast; The rigidity of backing plate can be by groove the variation of width, the degree of depth and separation change, can make the high-elastic vibration attenuation pad of low rigidity of different quiet, dynamic stiffness with macromolecular material, make it have excellent comprehensive performances such as high elasticity, high bearing capacity, high effectiveness in vibration suppression, high application life with higher bending modulus.

Product design requirement that can be different according to the client, design by geometry, can can pass through the quantity of groove or circle shape by novel total amount distortion size (rigidity), the depth and general thickness change, concrete realizing under low load (low speed), having bigger distortion on the same backing plate, very little characteristics of deflection again under heavy duty (at a high speed), comfortable in the time of can fully guaranteeing the track traffic low cruise and at a high speed or the stable and safety during heavy service.

Claims

1. thermoplastic polyester elastomer backing plate, it is characterized in that: described backing material adopts the polyester elastomer of du pont company, backing plate is on body, soffit is formed with a groove (1) or column, and the bottom land (11) of groove (1) presents arc, is slyness with cell wall and joins, groove depth 5 ~ the 8mm of groove, groove width 14 ~ 18mm, inter-alveolar distance 30 ~ 35mm, column be arranged as horizontal and vertical orthogonal arrangement.