DE878051C - Turbo machine for vehicle propulsion - Google Patents
Turbo machine for vehicle propulsionInfo
- Publication number
- DE878051C DE878051C DER1888D DER0001888D DE878051C DE 878051 C DE878051 C DE 878051C DE R1888 D DER1888 D DE R1888D DE R0001888 D DER0001888 D DE R0001888D DE 878051 C DE878051 C DE 878051C
- Authority
- DE
- Germany
- Prior art keywords
- vehicle propulsion
- code number
- turbomachine
- torque
- turbo machine
- 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
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
- F01D1/18—Non-positive-displacement machines or engines, e.g. steam turbines without stationary working-fluid guiding means
- F01D1/20—Non-positive-displacement machines or engines, e.g. steam turbines without stationary working-fluid guiding means traversed by the working-fluid substantially axially
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Bei Fahrmügantrieben muß unter mehr oder weniger großer Belastung angefahren werden. Zu diesem Zweck müssen die Antriebsmaschinen ein Anfahrmoment erzeugen, das ein Vielfaches des Drehmomentes bei günstiger Drehzahl ausmacht. So rechnet :der Lokomotivbau mit Anfahrmomenten, die bis zum vierfachen des Drehmomentes bei günstigster Drehzahl betragen. Die Erkenntnis,-daß dasVerhältnis desAnfahrmomentes zum Drehmoment bei günstigster Drehzahl am kleinsten bei ,der Gleichdruckschaufelung ist und mit zunehmendem Reaktionsgrad der Schaufelung ansteigt, führte zu dem Vorschlag, zur Erzielung eines hohen Anfahrmomentes einen hohen Reaktionsgrad zu verwenden.In Fahrmüg drives must be under more or less heavy load be approached. For this purpose, the prime movers must have a starting torque generate that is a multiple of the torque at a favorable speed. So Calculates: Locomotive construction with starting torques that are up to four times the torque at the most favorable speed. The realization that the ratio of the starting torque the smallest to the torque at the most favorable speed, the constant pressure blades and increases with the increasing degree of reaction of the blades, led to the proposal that to use a high degree of reaction to achieve a high starting torque.
Vorliegender Erfindung liegt die Erkenntnis zugrunde, daß (dieses Drehmom:entenverhältnis auch durch die Wahl :der . Kennziffer bzw. des Geschwindigkeitsverhältnisses ulc bei Baulast beeinflußt wird.The present invention is based on the knowledge that (this Torque ratio also by choosing: the. Code number or the speed ratio ulc is influenced during construction work.
In der Zeichnung ist beispielsweise für die übliche überdruckschaufelung mit gleichen Profilen von Leit- und Laufkranz; deren Reaktionsgrad etwa o,5 beträgt"dieAbhängigkeit des Verhältnisses des Anfahrmornentes zum Drehmoment von der Parsomsschen Kennziffer bei Baulast bzw. von dem Verhältnis der jeweiligen .Dampfgeschwindigkeit zur Umfangsgeschwindig-eit, die der Auslegung zugrunde liegt"dargestellt. Der Verlauf der Kurve hat nur Vergleichswert. Sie zeigt ein erst allmähliches, :dann stärkeres Ansteigen des Drehmomentenverhältnisses. Je größer die Kennziffer bei Baulast gewählt wird, desto höher steigt das Momentenverhältnis, praktisch beschränkt durch die Zahl der zu verwendenden Stufen. -Denn die Stufenzahl wächst im umgekehrten Verhältnis mit dem Gefälle pro Stufe, .das mit zunehmendem u/c abnimmt.In the drawing, for example, is for the usual overpressure shoveling with the same profile of the guide and running ring; their degree of reaction is about 0.5 "the dependency the ratio of the starting torque to the torque from the Parsoms index in the case of construction load or of the ratio of the respective steam speed to the circumferential speed, which is the basis of the design ". The course of the curve is only a comparison value. It shows a gradual, then a stronger increase in the torque ratio. The larger the code number is selected for the construction load, the higher the torque ratio increases, practically limited by the number of stages to be used. -Because the number of stages grows in inverse proportion to the gradient per step, that with increasing u / c is decreasing.
Voraussetzung für die wirtschaftliche Ausnutzung dieser Erkenntnis ist die Verwendung von Profilen, die auch bei ungebräuchlich hohen Werten der Kennziffer, die jenseits des Scheitels der W'irkungsgrgdkurve liegen, eine gute Umsetzung gewährleisten. Dies gilt für Profile mit flach gestelltem und verdicktem Eintrittsteil.Prerequisite for the economic exploitation of this knowledge is the use of profiles that, even with unusually high values of the code number, which are beyond the apex of the efficiency curve ensure good implementation. This applies to profiles with a flattened and thickened entry part.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER1888D DE878051C (en) | 1943-07-30 | 1943-07-30 | Turbo machine for vehicle propulsion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DER1888D DE878051C (en) | 1943-07-30 | 1943-07-30 | Turbo machine for vehicle propulsion |
Publications (1)
Publication Number | Publication Date |
---|---|
DE878051C true DE878051C (en) | 1953-06-01 |
Family
ID=7395737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DER1888D Expired DE878051C (en) | 1943-07-30 | 1943-07-30 | Turbo machine for vehicle propulsion |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE878051C (en) |
-
1943
- 1943-07-30 DE DER1888D patent/DE878051C/en not_active Expired
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