Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B61—RAILWAYS
  • B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
  • B61H13/00—Actuating rail-vehicle brakes
  • B61H13/34—Details
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B82—NANOTECHNOLOGY
  • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
  • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
  • F16C33/06—Sliding surface mainly made of metal
  • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
  • F16C33/16—Sliding surface consisting mainly of graphite
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/02—Parts of sliding-contact bearings
  • F16C33/04—Brasses; Bushes; Linings
  • F16C33/20—Sliding surface consisting mainly of plastics

Definitions

• the invention relates to the field of mechanical engineering, namely to the production of bushings for the lever brake system of a rail passenger or freight transport, including subway cars operated without the use of lubricant.
• the objective of the invention is to develop a sleeve lever brake system of a rail vehicle.
• the technical result is to increase the service life of the sleeve of the lever brake system of the rail transport due to a significant decrease in the intensity of the linear wear of the sliding layer during friction on polished steel pair from 40X steel, to increase the stability of the coefficient of friction during friction on the material of the counter-body of 40X steel, to increase the breaking stress at tension, preservation of Charpy impact strength on specimens without notching while maintaining a predetermined compressive strength, as well as viscous friction coefficient with increasing its stability.
• the proposed sleeve of the lever brake system of the rail transport made of a composite polymer antifriction material based on polyamide containing carbon fiber or a mixture of carbon fiber with glass fiber as a filler composite polymer antifriction material additionally contains randomly arranged carbon nanotubes in the form of single-layer, multilayer with the number of layers from 2 to 70 or nested into each other rolled up graphite planes into the tube, the outer diameter of the carbon nanotubes is selected from 0.1 to 100 nm, and their length is from 1 to 70 ⁇ m, the composite polymer antifriction material as a base additionally contains a mixture of polyamide with 20 - 40 wt.% Polyethylene caproamide, while the composite polymer as the base polyamide th antifriction material is polyamide 6 or B or aprolon ertalon, fiberglass content in mixtures thereof with carbon fiber-polymer composite fibrous filler antifriction material selected from 3.48 to 10.5
• polyamide the rest is up to 100%.
• the composite polymer antifriction material contains carbon fiber obtained from high molecular weight hydrated cellulose fiber or from polyacrylonitrile fiber.
• the carbon fiber of the composite polymer antifriction material is used in the form of a tow, or chopped tow or chopped tape, and fiberglass is used in the form of chopped yarn, while the length of the chopped tow or carbon fiber tape and chopped fiberglass is selected from 1 mm to 48 mm.
• the sleeve of the lever brake system of the rail transport is preferably made with an outer diameter of 30-50 mm, with an inner diameter of 20-40 mm and a length of 12-150 mm.
• composite polymer antifriction material of randomly arranged carbon nanotubes in the form of single-layer, multi-layer with the number of layers from 2 to 70 or nested into each other rolled into a tube of graphite planes,
• the choice of the outer diameter of carbon nanotubes from 0.1 to 100 nm, lengths from 1 to 70 microns, - as the basis of the composite polymer antifriction material further comprises a mixture of polyamide with 20 to 40 wt.% polyethylene caproamide, while polyamide 6, or Caprolon B or Ertalon, is used as the polyamide of the base of the composite polymer antifriction material,
• the proposed bushings of the lever brake system of the rail transport have a friction coefficient upon friction on the polished surface of a 40X steel counter body with a hardness of 32 - 38 HRC in the range 0.11 - 0.16, while the friction coefficient stability is increased to 0, 89 - 0.92.
• the proposed bushings of the lever brake system in a pair of friction are operable from the beginning of full-scale sea trials and do not require their replacement to date.
• Table 1 shows the experimental compositions of a composite polyamide-based polymer antifriction material used to manufacture the proposed bushings of the lever brake system of the rail vehicle
• Table 2 shows the standard characteristics of the sleeve of the lever brake system of the rail vehicle.
• the manufacturing technology of the proposed bushings of the lever brake system of rail vehicles for various purposes in the form of a continuous sleeve or a split sleeve in the form of segments with sliding working surfaces does not require the use of specific technological equipment for its manufacture and includes injection molding of products of specified geometric shapes in an injection molding machine. from a composite polyamide-based polymeric antifriction material.
• the proposed bushings of the lever brake system of the rail transport have an increased service life compared to the prototype sleeve due to a significant decrease in the intensity of the linear wear of the sliding layer during friction on polished steel pair from 40X steel, have Charpy impact strength on specimens without notch at level 45 - 55.8 kJ / m 2 , with a compressive strength at the level of 160 - 180 MPa and at the same time with an increased tensile stress at tension up to 174 - 201 MPa.
• the proposed bushings of the lever brake system of the rail transport are characterized by increased stability of the friction coefficient during friction on the material of the 40X steel counter-body while maintaining a low friction coefficient and compressive strength.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Nanotechnology (AREA)
• Condensed Matter Physics & Semiconductors (AREA)
• Composite Materials (AREA)
• General Physics & Mathematics (AREA)
• Materials Engineering (AREA)
• Crystallography & Structural Chemistry (AREA)
• Physics & Mathematics (AREA)
• Braking Arrangements (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Materials For Medical Uses (AREA)
• Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)

Priority Applications (3)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49710558

Family Applications (1)

Country Status (5)

Families Citing this family (8)

Family Cites Families (4)

• 2012
  • 2012-07-23 RU RU2012130413/11A patent/RU2499921C1/ru active
• 2013
  • 2013-08-09 EA EA201500095A patent/EA026983B1/ru not_active IP Right Cessation
  • 2013-08-09 HU HU1500116A patent/HUP1500116A2/hu unknown
  • 2013-08-09 WO PCT/RU2013/000695 patent/WO2014017957A2/ru not_active Ceased
  • 2013-09-08 UA UAA201501298A patent/UA111127C2/uk unknown

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