CN104927991A - Wheel-rail solid lubrication block and preparation method thereof - Google Patents

Abstract

The invention discloses a wheel-rail solid lubrication block and a preparation method thereof. The lubrication block is prepared from the following materials in parts by weight: 30-70 parts of polytetrafluoroethylene powder, 30-70 parts of graphite powder and 2-10 parts of paraffin. The preparation method comprises the following steps: conducting extrusion formation on polytetrafluoroethylene powder and graphite powder; heating by the stepped heating method; then cooling to the room temperature by the stepped cooling-down method; enabling paraffin to permeate to obtain the wheel-rail solid lubrication block. The polytetrafluoroethylene material is low in friction coefficient and better in anti-friction effect, thereby prolonging the life cycles of both wheels and rails; as no molybdenum disulfide, lead or other rare and heavy metal is added, environmental protection is more facilitated; friction between the wheels and the rails is effectively reduced, so that the engine traction efficiency is improved, and energy conservation and emission reduction are further realized.

Description

Wheel track solid stick and preparation method thereof

Technical field

The present invention relates to a kind of rail transit rolling stock parts and preparation method thereof, be specifically related to a kind of locomotive car wheel and rail lubrication device and preparation method thereof.

Background technology

At present, the Wheel track lubricating device of rail transit rolling stock adopts liquid lubrication and solid lubrication.Liquid lubrication is generally power with pressure air, and lubricant is coated on wheel rim by electricity consumption prosecutor formula at regular time and quantity, between wheel track, form lubrication belt.This lubricating system is greatly affected by environment, cold district Summer and winter needs to use different lubricants, simultaneously because rolling stock is in operation the swing of wheel, cause lubricant application inaccurate, wheel high speed rotating makes partial lubrication agent depart from wheel rim under the influence of centrifugal force in addition, pollutes surrounding environment and rolling stock self.The device of rolling stock wheel and rail solid lubrication in recent years relies on structure simple, do not need electronic system, reliable effect and low stain are comparatively fast developed, and preferably resolve rolling stock wheel rim and curved steel rail to a certain extent because of abrasion and cause the problem of early failure.The material that the wheel track solid stick of current use generally adopts the primary liquid such as molybdenumdisulphide, lead lubricant to use for improving antifriction effect, makes solid stick by the mode plastified.Although molybdenumdisulphide frictional coefficient is lower, oxidizable in atmosphere, lead is heavy metal, therefore still there is certain pollution to environment.

Summary of the invention

The object of this invention is to provide a kind of wheel track solid stick and preparation method thereof, all adopt non-metallic material, applied science method choice material, by adjusting each component proportion, making the frictional coefficient of material lower.

The object of the invention is to be achieved through the following technical solutions:

A kind of wheel track solid stick, according to mass ratio meter, is prepared from by polytetrafluoroethylene powder 30 ~ 70, Graphite Powder 99 30 ~ 70, paraffin 2 ~ 10.

A preparation method for above-mentioned wheel track solid stick, selects polytetrafluoroethylene (PTFE), high purity graphite, paraffin by plasticizing forming process, the serial wheel track solid stick of combinations produce different hardness, and concrete preparation process is as follows:

First by polytetrafluoroethylene powder, Graphite Powder 99 extrusion molding, the method heated by ladder is heated: room temperature ~ 120 DEG C, are incubated 0.5 ~ 1.5 hour by 30 ~ 50 DEG C/h; 120 ~ 240 DEG C, 40 DEG C/h, be incubated 0.5 ~ 1.5 hour; 240 ~ 330 DEG C, 30 ~ 50 DEG C/h, be incubated 0.5 ~ 1.5 hour; 330 ~ 375 DEG C, 30 ~ 50 DEG C/h, be incubated 0.5 ~ 1.5 hour; Ladder cooling process, to room temperature, is infiltrated paraffin, is completed the making of wheel track solid stick.

In the present invention, the purity of high purity graphite powder is more than 99.9%.

In the present invention, in ladder temperature-fall period, first cool to 120 DEG C with the speed of 40 ~ 60 DEG C/h, be then cooled to room temperature (rate of temperature fall can not control).

Tool of the present invention has the following advantages:

1) polytetrafluoroethylmaterial material frictional coefficient is low, and below 0.1, antifriction effect is better, extends the life cycle of wheel and rail.

2) unrare containing molybdenumdisulphide, lead etc. and heavy metal, advantageously in environmental protection.

3) significantly reduce frictional force between wheel track, improve locomotive traction efficiency, further energy-saving and emission-reduction.

Accompanying drawing explanation

Fig. 1 is the structural representation of wheel track solid stick;

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

Embodiment

Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but be not limited thereto; everyly technical solution of the present invention modified or equivalent to replace, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.

Embodiment one: as shown in Fig. 1 ~ 2, the structure of the wheel track solid stick that present embodiment provides is: top is provided with boss, and bottom is provided with groove, and boss and groove structure adapt; Material is: according to mass ratio meter, polytetrafluoroethylene (PTFE): 35, high purity graphite: 57, paraffin: 8; Main manufacture craft is as follows: first by polytetrafluoroethylene powder, the extrusion molding of high purity graphite powder, and the method heated by ladder is heated: room temperature ~ 120 DEG C, are incubated 1 hour by 40 DEG C/h; 120 ~ 240 DEG C, 40 DEG C/h are incubated 1 hour; 240 ~ 330 DEG C, 40 DEG C/h, be incubated 1 hour; 330 ~ 375 DEG C, 40 DEG C/h, be incubated 1 hour; Ladder cooling process, to room temperature, is infiltrated paraffin, is completed the making of wheel track solid stick.

Embodiment two: present embodiment and embodiment one are unlike, polytetrafluoroethylene (PTFE): 49, high purity graphite: 45, paraffin: 6.

Embodiment three: present embodiment and embodiment one are unlike, polytetrafluoroethylene (PTFE): 62, high purity graphite: 35, paraffin: 3.

Claims (6)

1. a wheel track solid stick, is characterized in that described lubrication block is according to mass ratio meter, is prepared from by polytetrafluoroethylene powder 30 ~ 70, Graphite Powder 99 30 ~ 70, paraffin 2 ~ 10.

2. wheel track solid stick according to claim 1, is characterized in that described lubrication block is according to mass ratio meter, is prepared from by polytetrafluoroethylene powder 35, Graphite Powder 99 57, paraffin 8.

3. wheel track solid stick according to claim 1, is characterized in that described lubrication block is according to mass ratio meter, is prepared from by polytetrafluoroethylene powder 49, Graphite Powder 99 45, paraffin 6.

4. wheel track solid stick according to claim 1, is characterized in that described lubrication block is according to mass ratio meter, is prepared from by polytetrafluoroethylene powder 62, Graphite Powder 99 35, paraffin 3.

5. the wheel track solid stick according to claim 1,2,3 or 4, is characterized in that the purity of described graphite is more than 99.9%.

6. a preparation method for wheel track solid stick described in claim 1, is characterized in that described method steps is as follows:

First by polytetrafluoroethylene powder, Graphite Powder 99 extrusion molding, the method heated by ladder is heated: room temperature ~ 120 DEG C, are incubated 0.5 ~ 1.5 hour by 30 ~ 50 DEG C/h; 120 ~ 240 DEG C, 40 DEG C/h, be incubated 0.5 ~ 1.5 hour; 240 ~ 330 DEG C, 30 ~ 50 DEG C/h, be incubated 0.5 ~ 1.5 hour; 330 ~ 375 DEG C, 30 ~ 50 DEG C/h, be incubated 0.5 ~ 1.5 hour; Ladder cooling process, to room temperature, is infiltrated paraffin, is completed the making of wheel track solid stick.