EP4676786A1 - Hydrodynamischer retarder - Google Patents
Hydrodynamischer retarderInfo
- Publication number
- EP4676786A1 EP4676786A1 EP24711145.3A EP24711145A EP4676786A1 EP 4676786 A1 EP4676786 A1 EP 4676786A1 EP 24711145 A EP24711145 A EP 24711145A EP 4676786 A1 EP4676786 A1 EP 4676786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- working medium
- stator
- rotor
- tank
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T10/00—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope
- B60T10/02—Control or regulation for continuous braking making use of fluid or powdered medium, e.g. for use when descending a long slope with hydrodynamic brake
-
- 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
- F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
- F16D57/04—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders with blades causing a directed flow, e.g. Föttinger type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
- B60T1/08—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium
- B60T1/087—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels using fluid or powdered medium in hydrodynamic, i.e. non-positive displacement, retarders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/04—Arrangements of piping, valves in the piping, e.g. cut-off valves, couplings or air hoses
Definitions
- the invention relates to the construction of a hydrodynamic retarder for a motor vehicle, in particular the construction of the housing of the retarder.
- Hydrodynamic retarders have a working chamber that can be filled with a working medium and then emptied from it.
- the working medium is used to transfer torque from a bladed rotor to a bladed stator.
- the rotor and thus a shaft that is particularly designed to be non-rotatable with the rotor, for example a universal joint shaft or transmission output shaft indirectly connected to the wheels of a vehicle, are decelerated.
- a structural unit that includes a rotor arranged on a shaft, which is rotatably mounted on both sides of the rotor relative to the structural unit.
- the structural unit includes a rotor housing, a stator housing and a bearing bell.
- the structural unit also called a rotor unit, is suitable for being inserted into a housing.
- a similar rotor unit or assembly is known from DE 10 2012 002 038 A1, which is pre-assembled and inserted into a housing part.
- the housing part forms a working medium tank with a second housing part.
- the working medium tank is connected to the retarder working space between the rotor and the stator via several channels.
- the housing parts include sections of channels for guiding the working medium, whereby the channels are only formed after the components have been assembled.
- the channels usually do not have a closed wall, so that further components and seals are provided to form the actual channels. Furthermore, there are several large sealing levels between the components that must be sealed against the environment. When oil is used as the working medium, it is important that no oil gets into the The manufacturing effort for retarders manufactured in this way with working medium containers is correspondingly complex and cost-intensive.
- the object of the invention is to propose a retarder with reduced manufacturing and assembly costs.
- a retarder comprising a retarder chamber in which a rotatably mounted rotor and a stator are arranged, which together form a working chamber that can be filled with and emptied from working medium.
- the retarder also comprises a working medium tank that has an area for receiving working medium that is not currently in the working chamber and an expansion area, at least one filling channel for supplying working medium into the working chamber and a return channel for discharging working medium from the working chamber, as well as a rotor housing, a stator housing and a tank housing.
- the rotor housing and the tank housing form the working medium tank and the retarder space is a space that is enclosed by the rotor housing and the stator housing, with a coupling plane between the rotor housing and the stator housing being arranged within the working medium tank.
- the retarder chamber can be a chamber formed by the rotor housing and a stator housing, with the stator being arranged between the rotor housing and the stator housing.
- the stator housing is arranged completely within the chamber formed by the rotor housing and the tank housing.
- the bearing of the stator arranged on a rotor shaft Rotors are preferably supported via a first bearing opposite the rotor housing and via a second bearing opposite the stator or the stator housing.
- the internal contact surfaces e.g. the surfaces between the rotor housing, stator and stator housing, can form functional levels, whereby no seal is required in the functional level. In the event of a minor leak in the functional level, the working medium flows directly back into the working medium tank.
- This design decouples the actual retarder function from the sealing function against the environment, and only one large-area seal is required, whereby no further functions have to be ensured via the seal arranged between the components.
- the rotor housing and the tank housing are designed in a shell-like manner and that a seal is arranged between the rotor housing and the tank housing.
- the sealing surfaces on the rotor housing and the tank housing are easy to produce, so that a secure seal of the working medium tank against the environment can be provided relatively easily.
- a coupling plane can be provided on the tank housing, which has a first channel and a second channel, via which a fluid-conducting connection with the primary side of a heat exchanger can be established.
- This coupling plane can also be easily sealed.
- An intermediate component with intermediate channels can be arranged between the heat exchanger and the tank housing. Alternatively, the channels can be provided on different coupling planes on the tank housing.
- the return channel is designed as a fluid-conducting connection between the working chamber and the feed channel, whereby the return channel can be integrated into the stator housing at least in sections.
- a pipe connection could be provided.
- an inlet chamber can be arranged between the filling channel and the working chamber, wherein the inlet chamber is a space formed between the stator and stator housing components.
- the working medium tank has an expansion region, a storage region and a sump region, wherein the filling channel is designed as a pipe that essentially leads through the working medium tank and an inlet opening of the filling channel ends in the sump region. This prevents air from entering the working chamber via the filling channel when the retarder is switched to braking mode.
- the inlet opening in the filling channel and an outlet opening of the return channel are aligned with each other. It is advantageous if the distance (x) between the inlet opening and the outlet opening is between 1 mm and 25 mm.
- Figure 1 shows a sketch showing the basic housing structure of the retarder 1.
- the outer shell of the retarder 1 essentially consists of two parts, the rotor housing 2 and the stator housing 3, each of which forms a half shell of the housing.
- the housing parts 2 and 3 enclose a cavity, whereby the cavity is divided into three areas.
- a cavity area 27, a storage area 26 and a retarder area 28 are provided.
- the cavity region 27, the storage region 26 and the sump region 25 together form the working medium tank 15, wherein the working medium 9 collects in the storage region 26 and sump region 25 when the retarder is switched to non-braking mode.
- the cavity area 27 is a space which is essentially designed to ensure that no working medium can enter the compressed air control, also called MRCU.
- a working medium separator or oil separator 28 is provided between connection 17 and working medium tank 15. Separating oil can flow back into the working medium tank 15 via the drain 30.
- the compressed air control regulates the braking torque of the retarder 1.
- the area between the rotor housing 2 and the stator housing 3 is referred to as the retarder area 28.
- the rotor 6, the stator 7, the mounted rotor shaft 8 and channels for guiding the working medium are arranged in the retarder area 28.
- the rotor 6 can be arranged axially displaceably on the rotor shaft 8, as is known from the prior art.
- the bearing of the rotor shaft 8, on which the rotor 6 is arranged in a rotationally fixed manner, is carried out as shown in Figure 1 via a first bearing 5a opposite the rotor housing and via a second bearing 5b opposite the stator housing 3.
- Another solution not shown is a bearing opposite the stator 7.
- a bearing ring is provided on the stator 7, in which the outer ring of the bearing 5b is accommodated, so that there is only one coupling point opposite the rotor housing.
- a coupling plane 18 is provided on the tank housing 4 to which a heat exchanger 11 can be attached directly or indirectly, with a first channel 19 and a second channel 20 being provided in the coupling plane 18.
- the working chamber 14, between the rotor 6 and stator 7, is connected to the flow connection of the heat exchanger 11 via the first channel 19, and the outlet of the heat exchanger 11 is connected to the working medium tank 15 via the second channel 20.
- the cooled working medium 9 enters the working medium tank 15 via the second channel 20 when switching to non-braking mode, i.e. when the pressure in the expansion region 27 drops.
- a filling channel 12 is provided, which establishes a connection from the lower sump area 25 into the inlet chamber 23, which in turn is connected to the working chamber 14 via channels in the stator 7, not shown.
- the air pressure in the expansion area 27 is increased via the connection 17, whereby the working medium 9 reaches the working chamber 14 via the filling channel 12, the inlet chamber 23 and the channels in the stator 7.
- the known pumping effect of the retarder 1 causes the working medium 9 to be pumped back out of the working chamber via the return channel 13, the first channel 19, the heat exchanger 11 and the second channel 20 into the working medium tank 15.
- the filling channel 12 is arranged opposite the second channel 20 in such a way that working medium 9 flowing out of the second channel 20 can flow into the filling channel 12 via the inlet opening 21. During braking, this creates a circulating flow, with the working medium 9 flowing through the working medium tank 15 over a short section.
- the distance between the outlet from the second channel 20 and the inlet opening 21 can be selected between 1 mm and 25 mm, with the mixing of working medium 9 from the tank and working medium 9 from the circuit depending on the distance.
- the minimum working medium level in the working medium tank 15 must be above the inlet opening 21 to ensure that no air gets into the filling channel 12.
- the pressure of the control air in the expansion area 27 regulates the volume of the working medium in the circuit, which in turn determines the braking torque of the retarder.
- This control of the braking torque is standard and is therefore not described in more detail.
- Essential to this invention is the housing structure of the retarder 1, through which the surfaces of the functional levels 16, 24a, 24b are not simultaneously sealing surfaces with respect to the environment.
- Functional levels 16, 24a, 24b are levels that are crucial for the function of the retarder.
- Opposite surfaces of a functional plane 16, 24a, 24b are subject to tight tolerances. Compliance with tolerances is made significantly easier if minor leaks are irrelevant due to the elimination of a seal.
- All functional levels 16, 24a, 24b are located within the retarder housing parts 2 and 4, so that escaping oil from the retarder chamber 29 flows directly back into the retarder housing parts 2 and 4, so that escaping oil from the retarder chamber 29 flows directly back into the retarder housing parts 2 and 4, so that escaping oil from the retarder chamber 29 flows directly back into the retarder housing parts 2 and 4, so that escaping oil from the retarder chamber 29 flows directly back into the retarder housing parts 2 and 4, so that escaping oil from the retarder chamber 29 flows directly back into the
- Working medium tank 15 The seal between the rotor housing 2 and the tank housing 4 from the environment is provided by means of the seal 10, whereby parts 2 and 4 only function in relation to one another and have no influence on the retarder function.
- two O-rings 34 can be provided instead of the seal 10, whereby one O-ring is designed to seal radially and one O-ring is designed to seal axially. The tolerance requirements for such a design would be significantly lower.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Braking Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102023105954.8A DE102023105954A1 (de) | 2023-03-10 | 2023-03-10 | Hydrodynamischer Retarder |
| PCT/EP2024/056125 WO2024188837A1 (de) | 2023-03-10 | 2024-03-08 | Hydrodynamischer retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4676786A1 true EP4676786A1 (de) | 2026-01-14 |
Family
ID=90364455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP24711145.3A Pending EP4676786A1 (de) | 2023-03-10 | 2024-03-08 | Hydrodynamischer retarder |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260009434A1 (de) |
| EP (1) | EP4676786A1 (de) |
| CN (1) | CN120813505A (de) |
| DE (1) | DE102023105954A1 (de) |
| WO (1) | WO2024188837A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2361351C3 (de) * | 1973-12-08 | 1978-09-28 | Voith Getriebe Kg, 7920 Heidenheim | Hydrodynamische Bremsanlage für ein vorzugsweise nichtantreibbares Rad eines Fahr- oder Flugzeuges |
| JPS5918581B2 (ja) * | 1977-03-17 | 1984-04-27 | フオイト・ツルボ・ゲ−・エム・ベ−・ハ−・ウント・コンパニ−・カ−・ゲ− | 流体力学的制動装置 |
| DE102012002038A1 (de) | 2012-02-03 | 2013-08-08 | Voith Patent Gmbh | Hydrodynamischer Retarder |
| CN103047322A (zh) * | 2013-01-25 | 2013-04-17 | 重庆杰里安科技有限公司 | 液力缓速器 |
| DE102017109014A1 (de) | 2017-04-27 | 2018-10-31 | Voith Patent Gmbh | Hydrodynamische Maschine mit Seitenkanalpumpe |
| DE102021117390A1 (de) * | 2021-07-06 | 2023-01-12 | Voith Patent Gmbh | Arbeitsmediumtank für einen hydrodynamischen Retarder |
-
2023
- 2023-03-10 DE DE102023105954.8A patent/DE102023105954A1/de active Pending
-
2024
- 2024-03-08 EP EP24711145.3A patent/EP4676786A1/de active Pending
- 2024-03-08 WO PCT/EP2024/056125 patent/WO2024188837A1/de not_active Ceased
- 2024-03-08 CN CN202480017718.3A patent/CN120813505A/zh active Pending
-
2025
- 2025-09-10 US US19/324,389 patent/US20260009434A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN120813505A (zh) | 2025-10-17 |
| US20260009434A1 (en) | 2026-01-08 |
| WO2024188837A1 (de) | 2024-09-19 |
| DE102023105954A1 (de) | 2024-09-12 |
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Legal Events
| Date | Code | Title | Description |
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| STAA | Information on the status of an ep patent application or granted ep patent |
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Owner name: DRIVENTIC GMBH |
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