DE29603468U1 - Brake disc, in particular shaft brake disc for rail vehicles - Google Patents
Brake disc, in particular shaft brake disc for rail vehiclesInfo
- Publication number
- DE29603468U1 DE29603468U1 DE29603468U DE29603468U DE29603468U1 DE 29603468 U1 DE29603468 U1 DE 29603468U1 DE 29603468 U DE29603468 U DE 29603468U DE 29603468 U DE29603468 U DE 29603468U DE 29603468 U1 DE29603468 U1 DE 29603468U1
- Authority
- DE
- Germany
- Prior art keywords
- brake disc
- rail vehicles
- particular shaft
- brake
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002245 particle Substances 0.000 claims description 6
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 2
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 1
- 239000011777 magnesium Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 229910001060 Gray iron Inorganic materials 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
- C22C32/0063—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides based on SiC
-
- 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
- F16D65/12—Discs; Drums for disc brakes
- F16D65/125—Discs; Drums for disc brakes characterised by the material used for the disc body
-
- 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
- F16D65/12—Discs; Drums for disc brakes
- F16D65/123—Discs; Drums for disc brakes comprising an annular disc secured to a hub member; Discs characterised by means for mounting
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Braking Arrangements (AREA)
Description
KB-EGKB-EG
21.02.199621.02.1996
E/TG - SpE/TG - Sp
Unser Zeichen: 2267 GMOur reference: 2267 GM
Die Erfindung betrifft eine Bremsscheibe, insbesondere eine Wellenbremsscheibe für Schienenfahrzeuge.The invention relates to a brake disc, in particular a shaft brake disc for rail vehicles.
Bekannte Bremsscheiben der eingangs genannten Art bestehen z.B. aus Stahlguß oder Gußeisen mit Graphitzusatz. Ferner wird bereits seit mehreren Jahren (siehe z.B. die EP 0375025 Al) zur Verringerung des (ungefederten) Bremsgewichtes z.B. im Hochgeschwindigkeitsbereich der Einsatz von Aluminiumlegierungen getestet: wünschenswert ist der Einsatz eines Materials mit einer hohen Wärmekapazität zur Aufnahme der beim Bremsen frei werdenden Energie. Während der Fachmann auf der Suche nach geeigneten Bremsscheibenmaterialien im Gebiet der Werkstofftechnik relativ schnell auf die Aluminiumlegierungen trifft, wird weiteren Leichtmetallen in der Bremstechnik bisher relativ wenig Aufmerksamkeit geschenkt.Known brake discs of the type mentioned above consist, for example, of cast steel or cast iron with graphite additives. Furthermore, the use of aluminum alloys has been tested for several years (see, for example, EP 0375025 Al) to reduce the (unsprung) brake weight, for example in the high-speed range: the use of a material with a high heat capacity to absorb the energy released during braking is desirable. While experts looking for suitable brake disc materials in the field of materials technology come across aluminum alloys relatively quickly, other light metals in braking technology have so far received relatively little attention.
Die Erfindung zielt daher darauf ab, Bremsscheiben zu schaffen, mit denen sich der Komponentengewichtsanteil in Hinsicht auf die ungefederte Masse des Schienenfahrzeuges (insbesondere weitere Drehgestellteile) verringern läßt.The invention therefore aims to create brake discs with which the component weight proportion with regard to the unsprung mass of the rail vehicle (in particular other bogie parts) can be reduced.
Die Erfindung erreicht dieses Ziel durch den Gegenstand des Anspruches 1. Besonders überraschend ist dabei die Verwendung des Mg im Bremsscheibenbereich: obwohl Mg als brennbar gilt, ist sein Einsatz nach den Erkenntnissen der vorliegenden Erfindung in der Bremsscheibentechnik durchaus möglich: wesentlich ist die Auswahl eines geeigneten Zusatzes, um das Mg dem Bremsgebiet zu erschliessen.The invention achieves this goal through the subject matter of claim 1. The use of Mg in the brake disc area is particularly surprising: although Mg is considered to be flammable, its use in brake disc technology is certainly possible according to the findings of the present invention: the selection of a suitable additive is essential in order to make the Mg available to the braking area.
Nach der Erkenntnis der Erfindung kann das Gewicht einer Bremsscheibe gegenüber Scheiben aus Aluminiumlegierungen nochmals reduziert werden, wenn statt Aluminium Magnesiumbasislegierungen verwendet werden. Die Dichte r des Materials Mg beträgt:According to the invention, the weight of a brake disc can be further reduced compared to discs made of aluminum alloys if magnesium-based alloys are used instead of aluminum. The density r of the material Mg is:
i(Mg) = 1,75 kg/cdm.
Al weist dagegen eine Dichte von:i(Mg) = 1.75 kg/cdm.
Al, on the other hand, has a density of:
r (Al) = 2,7 kg/cdm (edm := Kubikdezimeter)r (Al) = 2.7 kg/cdm (edm := cubic decimeter)
auf. Daraus folgt, daß ein Reibring, der z.B.. in Grauguß (GG) 100 kg wiegt, bei gleichem Wärmeaufnahmevermögen in den Materialien Al und Mg folgendes wiegt:This means that a friction ring that weighs 100 kg in grey cast iron (GG), for example, weighs the following in the materials Al and Mg with the same heat absorption capacity:
Al: m(Al) = m(GG) c(GG)/C(Al) =Al: m(Al) = m(GG) c(GG)/C(Al) =
= 100kg * 0,54/0,9 =60 kg
Mg: m(Mg) = m(GG) c(GG) / C(Mg) == 100kg * 0.54/0.9 = 60kg
Mg: m(Mg) = m(GG) c(GG) / C(Mg) =
= 100kg* 0,54/1,02 =53 kg
(wobei m:= Masse; c:= Wärmekoeff.)= 100kg* 0.54/1.02 =53kg
(where m:= mass; c:= heat coefficient)
Das bedeutet, daß mittels Mg gegenüber Al-Bremsringen nochmals eine Gewichtsreduzierung von ca. 10% erzielbar ist!This means that using Mg, a further weight reduction of approx. 10% can be achieved compared to Al brake rings!
Durch den geringeren &Egr;-Modul von Mg (44GPa) gegenüber AL (70GPa) sind ferner die durch Temperaturgradienten bedingten Wärmespannungen Ea in dem Reibring aus Mg um ca. 30% niedriger als bei Al. (a := Wärmekoeffizient):Due to the lower ε-modulus of Mg (44GPa) compared to AL (70GPa), the thermal stresses Ea caused by temperature gradients in the friction ring made of Mg are approx. 30% lower than in Al. (a := thermal coefficient):
s(Mg) s(Al) E(Mg) a(Mg) / E(Al) a(Al)
= 1,14/1,68
= 0,68s(Mg) s(Al) E(Mg) a(Mg) / E(Al) a(Al)
= 1.14/1.68
= 0.68
26· uv ·:;:&pgr;:::26· uv · :;: &pgr; :: :
Zusammengefaßt ergeben sich damit als Hauptvorteile der Mg-Bremsscheibe:In summary, the main advantages of the Mg brake disc are:
Die Mg-Scheibe (bzw. ihr Reibring) ist um 10% leichter als eine vergleichbareThe Mg disc (or its friction ring) is 10% lighter than a comparable
Scheibe aus Al.Disc made of Al.
Mg verursacht geringere Wärmespannungen als Al.Mg causes lower thermal stresses than Al.
Vorteilhafte weitere Varianten der Erfindung sind in den Unteransprüchen angegeben. Als vorteilhaft haben sich ferner konstruktive Varianten von Plansitz-Wellenbremsscheiben erwiesen, bei denen Stahl-, Al- oder Mg-Naben mit Mg-Reibringen kombiniert werden; alternativ sind allerdings auch weitere Kombinationen denkbar. Angemerkt sei schließlich noch, daß auch Radbremsscheiben in vorteilhafter Weise aus Mg gefertigt werden können.Advantageous further variants of the invention are specified in the subclaims. Structural variants of plan-seat shaft brake discs in which steel, Al or Mg hubs are combined with Mg friction rings have also proven to be advantageous; alternatively, however, other combinations are also conceivable. Finally, it should be noted that wheel brake discs can also advantageously be made from Mg.
Nachfolgend wird die Erfindung unter Bezug auf die Zeichnung anhand von Ausführungsbeispielen näher beschrieben, wobei auch weitere Vorteile und Möglichkeiten der Erfindung deutlich werden. Es zeigt:The invention is described in more detail below with reference to the drawing using exemplary embodiments, whereby further advantages and possibilities of the invention also become clear. It shows:
Fig. 1 ein Ausführungsbeispiel einer erfindungsgemäßen Bremsscheibe.Fig. 1 shows an embodiment of a brake disc according to the invention.
Fig. 1 zeigt eine (Wellen-)Bremsscheibe 1 zum Einsatz in Hochgeschwindigkeitszügen. Die Bremsscheibe 1 ist in Reibring 2 und Nabe 3 unterteilt, die hier über eine Schraubverbindung 4 mit Klemmring 5 miteinander verbunden sind. Konstruktiv sei bezgl. der geometrischen Auslegung der Bremsscheibe auf das Knorr-Bremse-Patent 0 529 236 Bl verwiesen, insbesondere hat sich auch bei der vorliegenden Erfindung eine axiale Breite B von 140-200 mm bewährt.Fig. 1 shows a (shaft) brake disc 1 for use in high-speed trains. The brake disc 1 is divided into friction ring 2 and hub 3, which are connected to one another here via a screw connection 4 with clamping ring 5. With regard to the geometric design of the brake disc, reference is made to the Knorr-Bremse patent 0 529 236 Bl, in particular an axial width B of 140-200 mm has also proven to be successful in the present invention.
Die Bremsscheibe 1 besteht aus einer durch harte Partikel verstärkten Magnesiumlegierung: vorteilhaft ist es, sowohl die Nabe 3 als auch den Reibring 2 (oder aber nur Teile der Bremsscheibe) aus einer Mg-Legierung zu fertigen.The brake disc 1 consists of a magnesium alloy reinforced with hard particles: it is advantageous to manufacture both the hub 3 and the friction ring 2 (or only parts of the brake disc) from a Mg alloy.
Besonders vorteilhaft ist es ferner, wenn die zugesetzten Fremdpartikel aus Siliziumkarbid bestehen. Bevorzugt liegt der Anteil des Si bei 5-25 Gew%. Schließlich hat es sich als vorteilhaft erwiesen, wenn die Fertigung des Bremsscheibenmaterials durch einenIt is also particularly advantageous if the added foreign particles consist of silicon carbide. The Si content is preferably 5-25% by weight. Finally, it has proven to be advantageous if the brake disc material is manufactured by a
Gießprozeß erfolgt, bei dem übereutektische harte Verstärkungspartikel ausgeschieden werden.Casting process takes place in which hypereutectic hard reinforcement particles are precipitated.
Claims (4)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29603468U DE29603468U1 (en) | 1995-06-14 | 1996-02-26 | Brake disc, in particular shaft brake disc for rail vehicles |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19521410 | 1995-06-14 | ||
| DE29603468U DE29603468U1 (en) | 1995-06-14 | 1996-02-26 | Brake disc, in particular shaft brake disc for rail vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE29603468U1 true DE29603468U1 (en) | 1996-05-30 |
Family
ID=7764226
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29603468U Expired - Lifetime DE29603468U1 (en) | 1995-06-14 | 1996-02-26 | Brake disc, in particular shaft brake disc for rail vehicles |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE29603468U1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0863326A2 (en) * | 1997-03-05 | 1998-09-09 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Shaft brake disc for disc brakes of railway vehicles |
-
1996
- 1996-02-26 DE DE29603468U patent/DE29603468U1/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0863326A2 (en) * | 1997-03-05 | 1998-09-09 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Shaft brake disc for disc brakes of railway vehicles |
| DE19708901A1 (en) * | 1997-03-05 | 1998-09-17 | Knorr Bremse Systeme | Wave brake disc for disc brake systems of rail vehicles |
| EP0863326A3 (en) * | 1997-03-05 | 2000-05-03 | Knorr-Bremse Systeme für Schienenfahrzeuge GmbH | Shaft brake disc for disc brakes of railway vehicles |
| US6098764A (en) * | 1997-03-05 | 2000-08-08 | Knorr-Bremse Systeme fur Scheinfahrzeuge GmbH | Shaft brake disk for rail vehicle disk brake systems and method of making same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R207 | Utility model specification |
Effective date: 19960711 |
|
| R150 | Utility model maintained after payment of first maintenance fee after three years |
Effective date: 19990830 |
|
| R151 | Utility model maintained after payment of second maintenance fee after six years |
Effective date: 20020604 |
|
| R152 | Utility model maintained after payment of third maintenance fee after eight years |
Effective date: 20040519 |
|
| R071 | Expiry of right |