DE102013208893A1 - Retardertank - Google Patents

Abstract

The invention relates to a hydrodynamic machine, in particular a hydrodynamic retarder, with a rotor and a stator, which together form a toroidal work space which can be filled with a working medium, with an external working medium circuit, which via a flow at a working medium inlet of the working space and via a return on one Working medium outlet of the work space is connected, the working medium reservoir being connected to a pressurization system by means of which the working medium reservoir can be pressurized with compressed air. To improve operational safety, it is proposed that the working medium storage container (1) be made in two parts, comprising a storage container cover (2) and a storage container (3), at least the storage container (3) having stiffening elements (4).

Description

The invention relates to a hydrodynamic machine, in particular a hydrodynamic retarder.

In essence, a retarder comprises a retarder housing, a rotor and a stator, which together form a toroidal working space which can be filled with a working medium.

The working space is connected to an external working medium circuit, which includes, among other things, a working medium reservoir. About a flow this is connected to a working medium inlet of the working space for supplying working fluid from the working fluid reservoir into the working space. A return line is connected to a Arbeitsmediumauslass the work space. In the return, a heat exchanger for the removal of heat from the working fluid is also provided.

During braking operation, the working medium in the working medium reservoir is pressurized with up to 3 bar pressure and pumped into the working space. Here, a braking torque is generated by the hydrodynamic principle, whereby the working fluid can heat up to 180 ° C. In the closed retarder circuit, the hot working medium is then cooled again by means of an integrated heat exchanger.

In non-braking operation, the working fluid is in the working fluid reservoir. The external working medium circuit, as known from the prior art, be constructed differently. As well as the structure of the retarder in general.

It has now been found that the known construction methods of the working medium storage container do not meet the requirements for operational safety and leak tightness in all cases.

The present invention is now based on the object of proposing a cost-effective solution to improve the reliability and leakage tightness.

The object is achieved essentially by means of a hydrodynamic machine with the features of claim 1.

A hydrodynamic machine according to the invention, in particular hydrodynamic retarder, according to the aforementioned type, is characterized in that the working medium reservoir is made in two parts, comprising a reservoir cap and a reservoir, wherein at least the reservoir has stiffening elements.

Stiffening elements in the sense of the invention are elements which at least minimize deformation of the container, so that the reservoir can be further weight and shape optimized.

The working fluid reservoir can be arranged or integrated in the retarder housing, wherein the reservoir can be integrated in a first housing part and the reservoir cap in a second housing part.

In a further embodiment it is provided that the stiffening elements are arranged in a star shape in the reservoir. Furthermore, a central housing clamping screw may be arranged at the intersection of the stiffening elements.

To ensure the leak-tightness of the working medium reservoir, the reservoir cap and the reservoir are screwed together at the periphery and by means of the central housing clamping screw.

The reservoir and / or the reservoir cap may be parts of the retarder, both parts may be designed as a casting.

A further advantage results if the stiffening elements are designed as ribs, which can additionally be shaped in such a way that all subareas resulting from the stiffening ribs, at least in the installation position, communicate with one another. For this purpose, the stiffening ribs, with a vertical parting plane between the container and the lid, can be concave-shaped towards the reservoir cap, so that a connecting space is formed.

Further features of the device according to the invention and further advantages of the invention will become apparent from the following description of preferred embodiments with reference to the drawings.

The invention will be explained in more detail with reference to drawings.

In these show:

1 a Retardergehäuseteil with reservoir

2 Sketch of the working medium storage tank

1 shows a retarder housing part 7 with storage tank 3 , The storage tank 3 is located in the retarder housing part 7 or is integrated in these. The housing part 7 includes even more functional areas that are necessary for the function of the retarder. Here are some channels 8th and connection holes 9 for the cooling circuit of the retarder.

In the storage container 3 are the stiffening ribs 4 arranged. Ribs 4 run in a star shape. At the intersection of the converging ribs is a central housing clamping screw 5 arranged.

The reservoir cap 2 is not shown in this view. This is ideally also at the same time a housing part of the retarder, in the other functional areas that are necessary for the function of the retarder are housed, such. B. the riser.

Ribs 4 can have different shapes. The important thing is that the volume of the container 3 , in operating position, is not divided into individual subregions so that the working fluid can remain in a single chamber.

2 shows a sketch of the working medium reservoir with a possible rib shape. Other rib shapes can be chosen. However, all embodiments must ensure the function. Once the function of maintaining a coherent volume and on the other hand improving the rigidity of the container 3 so that leaks are safely avoided and at the same time a weight reduction of the container is achieved. In the illustrated embodiment, this is achieved by the concave design of the rib. This design simplifies the production as a casting and ensures optimum force distribution F and thus a reduction in the inflation of the container, whereby the risk of leakage is reduced.

LIST OF REFERENCE NUMBERS

1

 Working fluid reservoir

2

 Reservoir lid

3

 reservoir

4

 ribs

5

 Housing clamping screw

6

 subregions

7

 Retardergehäuseteil

8th

 channels

9

 Connection holes cooling circuit

Claims (9)

Hydrodynamic machine, in particular hydrodynamic retarder, with a rotor and a stator, which together form a toroidal, can be filled with a working fluid working space with an external working fluid circuit connected via a flow to a working medium inlet of the working space and a return to a Arbeitsmediumauslass the working space is, wherein the working medium reservoir is in communication with a pressurizing system, by means of which the working medium reservoir is acted upon with compressed air, characterized in that the working medium reservoir ( 1 ) is made in two parts, comprising a reservoir cap ( 2 ) and a reservoir ( 3 ), wherein at least the reservoir ( 3 ) Stiffening elements ( 4 ) having. Hydrodynamic machine according to claim 1, characterized in that the stiffening elements ( 4 ) star-shaped in the reservoir ( 3 ) are arranged. Hydrodynamic machine according to claim 2, characterized in that a central housing clamping screw ( 5 ) in the crossing point of the stiffening elements ( 4 ) is arranged. Hydrodynamic machine according to one of claims 1 to 3, characterized in that the reservoir cap ( 2 ) and the reservoir ( 3 ) on the circumference and by means of the central housing clamping screw ( 5 ) are bolted together. Hydrodynamic machine according to claim 1, characterized in that the reservoir ( 3 ) and / or the reservoir cap ( 2 ) is a part of the retarder housing. Hydrodynamic machine according to claim 1 or 5, characterized in that the reservoir ( 3 ) and / or the reservoir cap ( 2 ) is a casting. Hydrodynamic machine according to one of claims 1 to 6, characterized in that the stiffening elements ( 4 ) Ribs or webs are. Hydrodynamic machine according to one of claims 1 to 7, characterized in that the stiffening elements are shaped such that all of the stiffening elements resulting subregions ( 6 ), at least in installation position, communicate with each other. Hydrodynamic machine according to claim 8, characterized in that the stiffening ribs ( 4 ) to the reservoir cap ( 2 ) are concave shaped.

Images