DE1024360B - Hydraulic pressure transducer - Google Patents

Description

GERMAN

The invention relates to a hydraulic pressure transducer, consisting of several in one to one fixed, longitudinal bores containing axis rotating cylinder block and arranged parallel to this axis Graduated pistons whose recoil after the working stroke by introducing low-pressure fluid into the High pressure cylinder takes place, as well as with annular spaces in the bores for the low pressure piston on its Back according to patent application M 24657 Ia / 59 a; it consists in that the annular spaces on the back of the low-pressure piston from the outside air and are closed from the high pressure circuit and filled with low pressure fluid and connected to each other are. This measure ensures that the return of the piston by means of the locked Oil through the forward gear of the associated piston working with a phase difference of 180 ° takes place, SO 'that only the frictional resistances of the pistons are to be overcome in reverse gear, so no further energy is required. This training has the further advantage that you can can make the same size annular spaces larger than the displacement of the low-pressure piston, so that no Metal parts collide more and the pressure transducer works silently at a very low level Wear and tear.

In order to maintain constant the volume of oil that is necessary for the return of the piston despite of the ever possible shrinkage, is the circle of mutual connection of the cylinders of the low pressure sector alternately connected to the reservoir and the primary flow circuit. This It is the connection that, at the moment of commencement of work, fills up this circle with the constant Amount of oil secures.

An exemplary embodiment of the invention is shown in the drawing. It shows

Fig. 1 is a section along the line 1-1 of Fig. 2,
Fig. 2 is a section along the line 2-2 of Fig. 1,
Fig. 3 is a section along the line 3-3 of Fig. 1,
Fig. 4 is a section along the line 4-4 of Fig. 1,
FIG. 5 shows a section along the line 5-5 in FIG. 1.
The new hydraulic pressure transducer consists essentially of a fixed axis 1 and a rotor 2 with circumferential toothing 3, by means of which it is set in one rotation around the fixed axis.

In the fixed axis 1 are on the low pressure side two longitudinal bores 4 for the inflow of the low-pressure fluid and two longitudinal bores 5 for each the outflow of the low-pressure fluid is attached to a storage tank, not shown. The holes are each time diametrically opposite (Fig. 2). On the high pressure side is in the solid Hydraulic pressure transducer

Addition to patent application M 24657 I a / 59a (Interpretation document 1 019 564)

Applicant:

Raymond Joseph Collion, Caluire, Rhone, and Pierre Antoine Favrin, Lyon, Rhone

(France)

Representative: Dr. O. Loesenbeck, patent attorney, Bielefeld, Herford Str. 17

Claimed priority: France of May 27, 1955

Raymond Joseph Collion, Caluire, Rhone, and Pierre Antoine Favrin, Lyon, Rhone (France), have been named as inventors

Axis 1, the longitudinal bore 6 is provided for the discharge of the high-pressure liquid.

The low-pressure liquid flowing in through the longitudinal bores 4, which is conveyed by a pump, not shown, known per se, can with appropriate Position of the rotor through the radial bores 7, which are attached in the circumference of the axis Partial ring grooves 8 and the radial bores 9 made in the rotor in the low-pressure cylinder 10 get in front of the holes 11 for the low pressure piston. These Teilringnuten 8, which are in the surface the axis 1 are milled in the circumferential direction, are all designed the same and have the same function like the partial ring grooves 13, 17 and 22 mentioned below.

The rotor 2 contains eight cylinders which are arranged around the axis 1 in the manner of a revolver drum. the Stepped pistons consist of the low pressure piston 18 in the cylinder 11 and the high pressure piston 19 in the Cylinder 15. The operating fluid displaced when the stepped pistons recoil passes through the radial Bores 16, the partial ring grooves 17 and the bores 24 in the drain hole 5 and from here in the storage container not shown.

709 879/2 «

According to the invention, the annular spaces 11a on the rear side of the low-pressure piston 18 are closed off from the outside air and from the high-pressure circuit 6 and are filled with low-pressure fluid and connected to one another. For this purpose, two almost semicircular annular grooves 28 and 29 are milled in the jacket of the axis 1 at the same height, but without any connection to one another. The radial bores 30 in the rotor, which connect the annular spaces with these half-ring grooves, open into these annular grooves 28, 29. Furthermore, two shorter longitudinal grooves 31 are arranged diametrically opposite one another, one of which opens into the annular groove 28 and the other opens into the annular groove 29. Furthermore, two longitudinal grooves 32 are also milled diametrically opposite in the casing of the axle, but offset by 90 ° in relation to the aforementioned longitudinal grooves 31. These longitudinal grooves 32 open into the grooves 17 of the axis 1 and thus into the feed lines of the low-pressure side. Furthermore, eight radial bores 33 are made in the rotor, which alternately connect these annular spaces 11 α with the longitudinal grooves 31, 32.

The mode of operation of the new pressure transducer is as follows: In the illustrated embodiment, the pistons work in pairs. When forward gear of a pair of pistons, the oil from the associated annular spaces 11 is α squeezed out and passes through the associated holes 30 in the associated Halbringnut 28 or 29 (Fig. 3) and from here via the associated radial bores 30 lla in the rotor in the annular spaces behind the low-pressure piston . The associated piston pairs each time have a phase difference of 180 °. In this way, the forward gear of a pair of pistons inevitably causes the recoil of the associated pair of pistons at the same time.

Claims (5)

PATENT CLAIMS: 1. Hydraulic pressure transducer, consisting of several in one around a fixed, longitudinal bores containing axis rotating cylinder block and parallel to this axis arranged stepped pistons, their recoil after the working stroke by introducing low-pressure fluid into the high-pressure cylinder takes place, as well as with annular spaces in the bores for the low-pressure piston on it Back, according to patent application M 246571 a / 59 a. characterized in that the annular spaces (lla) on the back of the low-pressure piston (18) from the outside air and from the high-pressure circuit (6) are closed and filled with low pressure fluid and connected to each other. 2. Hydraulic pressure transducer according to claim 1, characterized in that the volume is dati the annulus (shark is larger than the stroke volume the low pressure piston (18). 3. Hydraulic pressure transducer according to claim 1, characterized in that the annular spaces (lla) have the same volume among themselves. 4. Hydraulic pressure transducer according to claim 1, characterized in that to connect the annular spaces (11 a) below in the rotating cylinder block (2) radially inwardly directed bores (30) and in the fixed axis (1) semi-annular channels (28, 29 ) are provided. 5. Hydraulic pressure transducer according to claim 1, characterized in that the rotating Cylinder block (2) from the bore (11) for the low-pressure piston (18) radially inwards inwardly directed channels (33) are provided and the fixed axis (1) on its circumference two running in the longitudinal direction, offset from one another by 180 ° in the circumferential direction Longitudinal grooves (31, 32) is provided, one of which (31) with the semicircular channel (28) and the other (32) with the semi-annular channel (29) is constantly in communication and Both longitudinal grooves (31, 32) alternate with those arranged in the cylinder block (2) when the cylinder block (2) rotates radial bores (30) connect. Considered publications:
French Patent No. 987 120;
U.S. Patent Nos. 2,568,262, 2,486,079. 1 sheet of drawings © 709 879/249 2.