WO2019083400A1 - Brake shoe for a railway vehicle - Google Patents
Brake shoe for a railway vehicleInfo
- Publication number
- WO2019083400A1 WO2019083400A1 PCT/RU2018/000338 RU2018000338W WO2019083400A1 WO 2019083400 A1 WO2019083400 A1 WO 2019083400A1 RU 2018000338 W RU2018000338 W RU 2018000338W WO 2019083400 A1 WO2019083400 A1 WO 2019083400A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- insert
- friction element
- wear
- composite
- composite friction
- Prior art date
Links
- 239000002131 composite material Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 16
- 239000010959 steel Substances 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 11
- 229910052751 metal Inorganic materials 0.000 claims abstract description 11
- 230000007423 decrease Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 238000000465 moulding Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000021615 conjugation Effects 0.000 description 1
- 239000012765 fibrous filler Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H1/00—Applications or arrangements of brakes with a braking member or members co-operating with the periphery of the wheel rim, a drum, or the like
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/02—Braking members; Mounting thereof
- F16D65/04—Bands, shoes or pads; Pivots or supporting members therefor
- F16D65/06—Bands, shoes or pads; Pivots or supporting members therefor for externally-engaging brakes
-
- 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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D69/00—Friction linings; Attachment thereof; Selection of coacting friction substances or surfaces
- F16D69/02—Composition of linings ; Methods of manufacturing
Definitions
- the claimed utility model relates to the brake pads of railway vehicles and various rail vehicles.
- the analogue of the claimed utility model is a brake shoe of a rail vehicle containing a metal frame, a composite friction element and an insert made of a material with less wear resistance and a greater friction coefficient than the material (composite) of the composite friction element from the working surface of the block (see RF Patent
- the disadvantage of the analog is a lower wear resistance and a higher friction coefficient of the insert material (compared to the material of the composite friction element), which causes premature wear of the insert (as compared to the composite friction element), as a result of which the triple conjugation between the insert and the rolling surface of the wheel (specified in the analog “Advanced” wear of the insert), resulting in a reduction in the possibility for the insert to cleanse this surface from the impurities indicated in the analogue (including meals and snow). Also, due to a larger friction coefficient, the heating of the insert during tri-conjugation increases, which contributes to burnout of the surfaces of the composite friction element in contact with the insert, as a result of which the heat resistance of the pad decreases. Thus, the consequence of lower wear resistance and greater coefficient of friction is
- the closest analogue of the claimed utility model is a brake pad of a rail vehicle containing a metal frame, a composite friction element and an insert made of a material with less wear resistance and a lower friction coefficient than the material of a composite friction element from the working surface of the block (see RF Patent N Q 83817, IPC F16D 65/04, 2009).
- the essential features of the closest analogue “metal frame, composite friction element, insert made of a material with a lower friction coefficient” coincide with the essential features of the claimed utility model.
- the disadvantage of the closest analogue is also the “advanced” wear of the insert, which breaks the tribo-equipment between the insert and the wheel rolling surface, which reduces the ability of the insert to clean the wheel surface, which also results in a decrease in vehicle reliability and safety.
- the task which is addressed by the claimed utility model, is to increase reliability and safety by eliminating the “advanced” wear of the insert by ensuring compliance with the wear resistance of the material of the insert and the material of the composite friction element.
- the insert is made of a material whose wear resistance during friction steel corresponds to wear resistance under friction on steel of the material of the composite friction element.
- the brake shoe of a railroad vehicle contains a metal frame, for example, in the form of a suitably curved metal strip, to which a metal insert is fixed and a composite friction element is molded.
- the insert material has a lower coefficient of friction on steel than the coefficient of friction of a polymer composite material on steel.
- the wear resistance (linear wear) of the material of the insert for steel and the material of the composite friction element for steel correspond to each other (approximately equal). Description of the implementation of the claimed invention.
- a specific example of the inventive brake pads of a rail vehicle is a block with a stamped metal frame, in the central part of which an insert of wear-resistant cast iron is fixed by welding.
- the composite friction element is made of a composite with a polymer matrix in which dispersed and fibrous fillers are placed.
- the coefficient of friction of the material of the insert together with steel grade 1 or 2 is 0.15-0.20.
- Linear wear paired with steel grade 1 or 2 not more than 0.13 mm (0.09 + 0.11 mm).
- the coefficient of friction of the material of the polymer composite friction element paired with steel grade 1 or 2 is 0.38-0, 55.
- Linear wear paired with steel grade 1 or 2 is not more than 0.13 mm (0.09-0, 11 mm ).
- the inventive block can be manufactured by known methods, for example, by molding a molding mixture into a mold to a prefabricated framework with an insert.
- Uniform wear of the pads achieved by matching the wear resistance of the materials of the insert and the composite friction element, does not allow the “advanced” wear of the insert, does not disturb the friction of the surfaces of the insert and the wheel, retains the cleaning ability of the insert. As a result, the reliability and safety of the rail vehicle is increased.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The claimed utility model relates to brake shoes for railway vehicles and for various kinds of rail transport. A brake shoe for a railway vehicle comprises a metal frame, a composite friction element and an insert. The insert is formed from a material having a lower coefficient of friction than the composite friction element on the working surface side of the shoe, and having a resistance to wear in the event of friction on steel that corresponds to the resistance to wear in the event of friction on steel of the material of the composite friction element. The uniformity of the wear of the shoe that is achievable owing to the correspondence between the wear resistances of the material of the insert and of the composite friction element prevents the insert from wearing out faster than the composite friction element, maintains frictional engagement between the surfaces of the insert and the wheel, and preserves the cleanability of the insert. The reliability and safety of the railway vehicle are enhanced as a result.
Description
ТОРМОЗНАЯ КОЛОДКА ЖЕЛЕЗНОДОРОЖНОГО BRAKE PAD OF RAILWAY
ТРАНСПОРТНОГО СРЕДСТВА VEHICLE
Область техники Technical field
Заявляемая полезная модель относится к тормозным колодкам железнодорожных транспортных средств и различного рельсового транспорта. The claimed utility model relates to the brake pads of railway vehicles and various rail vehicles.
Предшествующий уровень техники Prior art
Аналогом заявляемой полезной модели является тормозная колодка железнодорожного транспортного средства, содержащая металлический каркас, композиционный фрикционный элемент и вставку, выполненную из материала с меньшей износостойкостью и большим коэффициент трения, чем материал (композит) композиционного фрикционного элемента со стороны рабочей поверхности колодки (см. патент РФThe analogue of the claimed utility model is a brake shoe of a rail vehicle containing a metal frame, a composite friction element and an insert made of a material with less wear resistance and a greater friction coefficient than the material (composite) of the composite friction element from the working surface of the block (see RF Patent
Ns 88753, МПК F16D 65/04, 2009 г.). Существенные признаки аналога «металлический каркас, композиционный фрикционный элемент, вставка» совпадают с существенными признаками заявляемой полезной модели. Ns 88753, IPC F16D 65/04, 2009). The essential features of the analogue “metal frame, composite friction element, inset” coincide with the essential features of the claimed utility model.
Недостатком аналога является меньшая износостойкость и больший коэффициент трения материала вставки (по сравнению с материалом композиционного фрикционного элемента), что вызывает преждевременный износ вставки (по сравнению с композиционным фрикционным элементом), в результате чего нарушается трибосопряжение между вставкой и поверхностью катания колеса (указанный в аналоге «опережающий» износ вставки), следствием чего является снижение возможности для очищения вставкой этой поверхности от загрязнений, указанных в аналоге (включая лед и снег). Также из-за большего коэффициента трения увеличивается нагрев вставки при трибосопряжении, что способствует выгоранию контактирующих со вставкой поверхностей композиционного фрикционного элемента, в результате снижается термостойкость колодки. Таким образом, следствием меньшей износостойкости и большего коэффициента трения является The disadvantage of the analog is a lower wear resistance and a higher friction coefficient of the insert material (compared to the material of the composite friction element), which causes premature wear of the insert (as compared to the composite friction element), as a result of which the triple conjugation between the insert and the rolling surface of the wheel (specified in the analog “Advanced” wear of the insert), resulting in a reduction in the possibility for the insert to cleanse this surface from the impurities indicated in the analogue (including meals and snow). Also, due to a larger friction coefficient, the heating of the insert during tri-conjugation increases, which contributes to burnout of the surfaces of the composite friction element in contact with the insert, as a result of which the heat resistance of the pad decreases. Thus, the consequence of lower wear resistance and greater coefficient of friction is
ЗАМЕНЯЮЩИЙ ЛИСТ (ПРАВИЛО 26)
снижение надежности и безопасности транспортного средства. SUBSTITUTE SHEET (RULE 26) decrease in reliability and safety of the vehicle.
Наиболее близким аналогом заявляемой полезной модели является тормозная колодка железнодорожного транспортного средства, содержащая металлический каркас, композиционный фрикционный элемент и вставку, выполненную из материала с меньшей износостойкостью и меньшим коэффициентом трения, чем материал композиционного фрикционного элемента со стороны рабочей поверхности колодки (см. патент РФ NQ 83817, МПК F16D 65/04, 2009 г.). Существенные признаки наиболее близкого аналога «металлический каркас, композиционный фрикционный элемент, вставка, выполненная из материала с меньшим коэффициентом трения» совпадают с существенными признаками заявляемой полезной модели. The closest analogue of the claimed utility model is a brake pad of a rail vehicle containing a metal frame, a composite friction element and an insert made of a material with less wear resistance and a lower friction coefficient than the material of a composite friction element from the working surface of the block (see RF Patent N Q 83817, IPC F16D 65/04, 2009). The essential features of the closest analogue “metal frame, composite friction element, insert made of a material with a lower friction coefficient” coincide with the essential features of the claimed utility model.
Недостатком наиболее близкого аналога также является «опережающий» износ вставки, нарушающий трибосопряжение между вставкой и поверхностью катания колеса, что снижает способность вставки к очищению поверхности колеса, следствием чего также является снижение надежности и безопасности транспортного средства. The disadvantage of the closest analogue is also the “advanced” wear of the insert, which breaks the tribo-equipment between the insert and the wheel rolling surface, which reduces the ability of the insert to clean the wheel surface, which also results in a decrease in vehicle reliability and safety.
Техническая задача. Задачей, на решение которой направлена заявляемая полезная модель, является повышение надежности и безопасности путем исключения «опережающего» износа вставки за счет обеспечения соответствия износостойкости материала вставки и материала композиционного фрикционного элемента. Technical problem. The task, which is addressed by the claimed utility model, is to increase reliability and safety by eliminating the “advanced” wear of the insert by ensuring compliance with the wear resistance of the material of the insert and the material of the composite friction element.
Для достижения указанного технического результата в тормозной колодке железнодорожного транспортного средства, содержащей металлический каркас, композиционный фрикционный элемент и вставку, выполненную из материала с меньшим коэффициентом трения, чем композиционный фрикционный элемент со стороны рабочей поверхности колодки, вставка выполнена из материала, износостойкость которого при трении по стали соответствует износостойкости при трении по стали материала композиционного фрикционного элемента. To achieve the technical result in a brake shoe of a railway vehicle containing a metal frame, a composite friction element and an insert made of a material with a lower friction coefficient than the composite friction element on the side of the working surface of the block, the insert is made of a material whose wear resistance during friction steel corresponds to wear resistance under friction on steel of the material of the composite friction element.
Существенные признаки заявляемой полезной модели «вставка
выполнена из материала, износостойкость которого при трении по стали соответствует износостойкости материала композиционного фрикционного элемента при трении по стали» являются отличительными от признаков наиболее близкого аналога. The essential features of the proposed utility model "insert made of a material whose wear resistance during friction on steel corresponds to the wear resistance of the material of a composite friction element during friction on steel, are distinctive from signs of the closest analogue.
Тормозная колодка железнодорожного транспортного средства содержит металлический каркас, например, в виде соответствующим образом изогнутой металлической полосы, к которой зафиксирована металлическая вставка и приформован композиционный фрикционный элемент. Материал вставки имеет меньший коэффициент трения по стали, чем коэффициент трения полимерного композиционного материала по стали. Износостойкость (линейный износ) материала вставки по стали и материала композиционного фрикционного элемента по стали соответствуют друг другу (приблизительно равны). Описание осуществления заявленного изобретения. The brake shoe of a railroad vehicle contains a metal frame, for example, in the form of a suitably curved metal strip, to which a metal insert is fixed and a composite friction element is molded. The insert material has a lower coefficient of friction on steel than the coefficient of friction of a polymer composite material on steel. The wear resistance (linear wear) of the material of the insert for steel and the material of the composite friction element for steel correspond to each other (approximately equal). Description of the implementation of the claimed invention.
Конкретным примером заявляемой тормозной колодки железнодорожного транспортного средства является колодка со штампованным металлическим каркасом, в центральной части которого сваркой зафиксирована вставка из износостойкого чугуна. Композиционный фрикционный элемент выполнен из композита с полимерной матрицей, в которой размещены дисперсные и волокнистые наполнители. Коэффициент трения материала вставки в паре со сталью марки 1 или 2 составляет 0,15- 0,20. Линейный износ в паре со сталью марки 1 или 2 не более 0,13 мм (0,09+0,11 мм). Коэффициент трения материала полимерного композиционного фрикционного элемента в паре со сталью марки 1 или 2 составляет 0,38-0, 55. Линейный износ в паре со сталью марки 1 или 2 составляет не более 0,13 мм (0,09-Ю, 11 мм). A specific example of the inventive brake pads of a rail vehicle is a block with a stamped metal frame, in the central part of which an insert of wear-resistant cast iron is fixed by welding. The composite friction element is made of a composite with a polymer matrix in which dispersed and fibrous fillers are placed. The coefficient of friction of the material of the insert together with steel grade 1 or 2 is 0.15-0.20. Linear wear paired with steel grade 1 or 2 not more than 0.13 mm (0.09 + 0.11 mm). The coefficient of friction of the material of the polymer composite friction element paired with steel grade 1 or 2 is 0.38-0, 55. Linear wear paired with steel grade 1 or 2 is not more than 0.13 mm (0.09-0, 11 mm ).
Изготавливаться заявляемая колодка может известными способами, например, приформовыванием в пресс-форме формовочной смеси к предварительно изготовленному каркасу со вставкой. The inventive block can be manufactured by known methods, for example, by molding a molding mixture into a mold to a prefabricated framework with an insert.
Равномерность износа колодки, достигаемая благодаря соответствию износостойкости материалов вставки и композиционного фрикционного
элемента, не допускает «опережающего» износа вставки, не нарушается трибосопряжение поверхностей вставки и колеса, сохраняется очищающая способность вставки. В результате повышается надежность и безопасность железнодорожного транспортного средства.
Uniform wear of the pads, achieved by matching the wear resistance of the materials of the insert and the composite friction element, does not allow the “advanced” wear of the insert, does not disturb the friction of the surfaces of the insert and the wheel, retains the cleaning ability of the insert. As a result, the reliability and safety of the rail vehicle is increased.
Claims
ФОРМУЛА ПОЛЕЗНОЙ МОДЕЛИ FORMULA OF USEFUL MODEL
Тормозная колодка железнодорожного транспортного средства, содержащая металлический каркас, композиционный фрикционный элемент и вставку, выполненную из материала с меньшим коэффициентом трения, чем композиционный фрикционный элемент со стороны рабочей поверхности колодки, отличающаяся тем, что вставка выполнена из материала, износостойкость которого при трении по стали соответствует износостойкости материала композиционного фрикционного элемента при трении по стали.
A brake shoe of a rail vehicle containing a metal frame, a composite friction element and an insert made of a material with a lower friction coefficient than the composite friction element on the side of the working surface of the pad, characterized in that the insert is made of a material whose wear resistance when rubbed on steel corresponds wear resistance of the composite friction element material during friction on steel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RU2017137564 | 2017-10-26 | ||
| RU2017137564 | 2017-10-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019083400A1 true WO2019083400A1 (en) | 2019-05-02 |
Family
ID=66246612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/RU2018/000338 WO2019083400A1 (en) | 2017-10-26 | 2018-05-28 | Brake shoe for a railway vehicle |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2019083400A1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2407321A1 (en) * | 1974-02-15 | 1975-08-21 | Newag Maschinen Apparate Und G | Brake block for railway rolling stock - has pockets to trap particles which could damage wheel tyre |
| US5794740A (en) * | 1996-08-23 | 1998-08-18 | Westinghouse Air Brake Company | Dual type composition brake block specifically designed for use in predetermined type brake systems |
| US6241058B1 (en) * | 1999-08-06 | 2001-06-05 | Westinghouse Air Brake Company | Brake shoe with insert bonded to backing plate |
| RU83817U1 (en) * | 2009-01-16 | 2009-06-20 | Открытое акционерное общество "Завод фрикционных и термостойких материалов" (ОАО "Фритекс") | RAIL VEHICLE BRAKE PAD |
| RU88753U1 (en) * | 2009-07-20 | 2009-11-20 | Открытое акционерное общество "Завод фрикционных и термостойких материалов" | RAIL VEHICLE BRAKE PAD |
| CN102134397A (en) * | 2011-02-22 | 2011-07-27 | 大连交通大学 | Synthetic brake shoe for urban railway vehicle and preparation method thereof |
-
2018
- 2018-05-28 WO PCT/RU2018/000338 patent/WO2019083400A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2407321A1 (en) * | 1974-02-15 | 1975-08-21 | Newag Maschinen Apparate Und G | Brake block for railway rolling stock - has pockets to trap particles which could damage wheel tyre |
| US5794740A (en) * | 1996-08-23 | 1998-08-18 | Westinghouse Air Brake Company | Dual type composition brake block specifically designed for use in predetermined type brake systems |
| US6241058B1 (en) * | 1999-08-06 | 2001-06-05 | Westinghouse Air Brake Company | Brake shoe with insert bonded to backing plate |
| RU83817U1 (en) * | 2009-01-16 | 2009-06-20 | Открытое акционерное общество "Завод фрикционных и термостойких материалов" (ОАО "Фритекс") | RAIL VEHICLE BRAKE PAD |
| RU88753U1 (en) * | 2009-07-20 | 2009-11-20 | Открытое акционерное общество "Завод фрикционных и термостойких материалов" | RAIL VEHICLE BRAKE PAD |
| CN102134397A (en) * | 2011-02-22 | 2011-07-27 | 大连交通大学 | Synthetic brake shoe for urban railway vehicle and preparation method thereof |
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