FR2565506A1 - SLIDING ELEMENT CENTRIFUGE - Google Patents

Abstract

THE INVENTION RELATES TO SLIDING ELEMENT CENTRIFUGES WHOSE DRUM IS EQUIPPED WITH A HYDRAULIC CYLINDER WITH PISTON AND DOUBLE ACTING CYLINDER SERVING AS A TRANSLATION MOTOR, AS WELL AS A ROTATION MOTOR, THE MOTOR SHAFT OF THE ROTATION MOTOR BEING CONSTITUTED BY A HOLLOW SHAFT, THE SEALING OF THE HYDRAULIC FLUID INLET DUCTS PRESENTS CONSIDERABLE DIFFICULTIES. ACCORDING TO THE INVENTION, THESE DIFFICULTIES ARE ELIMINATED BY THE FACT THAT THE HYDRAULIC CYLINDER WITH PISTON AND CYLINDER IS LOCATED IN THE HOLLOW SHAFT 1 OF THE ROTATION MOTOR.

Description

i 2565506 The invention relates to a centrifuge a

  sliding element, the drum of which is fitted with a

  hydraulic rinse piston and double acting cylinder, which forms the drive motor and a rotation motor mechanism, and in which the motor shaft

  the rotation motor consists of a hollow shaft.

  We already know, by the Swiss patent CH

  312 160, a centrifuge with multiple sliding element

  several floors presenting the type of construction above

  above and in which the hydraulic cylinder with piston and

  double acting liner is mounted on the outer end

  re of the motor shaft, which consists of a shaft

  hollow. In this machine, the introduction of the hy-

  hydraulics in the cylinder is carried out through several bores arranged radially in the hollow motor shaft

  and which are supplied with hydraulic fluid by con-

  fixed arrival lines. However, this centrifuge

  sliding element already known is of a construction re-

  laterally complicated and more cumbersome.

  The object of the invention is to simplify the

  hydraulic fluid inlet and return connections

  only with the piston and cylinder of the centrifuge-

  sliding element, both in appearance

  construction only under the aspect of the mode of operation-

is lying.

  According to the invention, this problem is solved by the fact that the hydraulic cylinder piston-cylinder is

  arranged in the hollow shaft of the rotational motor mechanism

  tion. The fact that, according to the invention, the hydraulic cylinder

  that piston-cylinder is arranged in the hollow shaft of the

  rotating motor mechanism, has the great advantage of giving

  using a centrifuge a very short method of construction

  massed and above all space-saving. According to another characteristic

  ristic of the invention, the hollow shaft forms the cylinder of the piston cylinder and cylinder, in which the piston is guided movable in axial translation, this piston being, on the one hand, coupled in displacement with the drum of

2 2565506

  the centrifuge via a rod of pis-

  tone and, on the other hand, in communication with conduits

  used for the inlet and outlet of the hydraulic fluid

  that and which are guided movable in axial translation.

  These characteristics have the great advantage of considerably simplifying the arrival of the hydraulic fluid in the piston-cylinder cylinder and considerably improving

the yield.

  The appended drawing, given solely by way of example, will make it clear how the invention can be implemented. This drawing schematically represents the

  motor mechanism of a centrifuge with sliding element

  health. As the drawing shows, the motor mechanism

  according to the invention is composed of a hollow shaft 1 which has

  tracks the drum of a sliding element centrifuge

  not shown in detail in the drawing. Inside

  laughing of the hollow shaft 1 is arranged a piston 2 which is rigidly connected, by the piston rod 3, to a sliding element of the centrifuge which is not shown

  in detail on the drawing. The piston 2 is provided with a bore

  axial ge 4 and a bearing bush 4 'housed in this bore and into which the inner conduit 5 opens

  a group of tubular conduits arranged concentrically-

  lie at a certain mutual spacing. In addition to its bearing function, the cushion 4 ′ also provides a seal function. To the bore 4 are connected radial and axial bores 6 and 7 which open into an annular space 8 comprised between the hollow shaft 1

and the piston rod 3.

  The central tubular conduit 5 is disposed in a tubular conduit 9 which surrounds 1 tubular conduit 5 at a certain spacing and which, in turn, is mounted

  in another concentric tubular conduit 10. These con-

  tubular tubes 5, 9, 10 arranged concentrically to a

  certain mutual spacing are axially guided internally

  inside of the motor shaft 1, in a bearing 11, of

3 2565506

  so as to be able to move in axial translation and, at the outer end, they are integrally connected to a connection head 12 serving for the arrival of the hydraulic fluid. The connection head 12 serves at the same time for reversing the arrival and return of the

  hydraulic fluid in the piston cylinder

  consequently, at the reciprocating movement of the piston 2, of the piston rod 3 fixed to this piston and of the sliding element of the centrifuge. Arrival control

  and the hydraulic fluid is returned in a

  lesson known per se and not shown in detail in the drawing. In the region inside the piston

  2, the central tubular conduit 5 is provided with an adhesive

  rette 13 which is assembled to the piston 2 by means of

  re of an axial roller stop 14 and a thread ring

  tee 15. The hollow shaft 1 is closed by a flange bearing 16 which isolates it from the outside. In the annular space

  17 located between the thread ring 15 e L flange 16,

  plugs the tubular conduit 9 which is in communication

  free with a hole 18 made in the connection head

  ment 12 for the arrival and return of the hydraulic fluid

  than. In the operation of the centrifuge with sliding element, the drum of the centrifuge is rotated by the motor shaft constituted by the hollow shaft 1. In this operation, the piston 2 housed in

  The hollow shaft and the piston rod 3 with the

  Smoothing which is in solidarity are also rotated

  tJion. Thanks to the stop ax ae with rollers 14 shown inside the piston, 2, the rotational movement is not transmitted to the tubes 3, 9 and 10. These tubes are therefore arranged in the piston so as not to accompany the movement of the piston 2 only in the axial direction. We

  therefore obtains the great advantage of carrying out under a

  me which always remains safe and wear resistant the

  hydraulic fluid inlet and return connections

4 2565506

  as with the cylinder cylinder constituted by the hollow shaft. When hydraulic fluid is introduced into the annular volume 8, passing through the central tube 5 and the holes 6 and 7, the piston 2 is pushed from the

  right to left while under the effect of the

  supply of hydraulic fluid to the annulus

  area 17 passing through tube 9, a displacement is obtained

  piston 2 from left to right. In request

  alternately both the piston 2 with a hydrous liquid

  lique arriving alternately by tubes 5 and 9, the

  piston 2 and therefore the piston rod 3 securely

  re of the piston and the sliding element fixed to this rod are animated, in addition to the rotational movement, a reciprocating or oscillating movement. The advantage

  particular of this drive device for the cent

  sliding element trifuge according to the invention consisting

  te in that the arrival of hydraulic fluid in the annular chambers 8 and 17 located on both sides of the

  piston 2 and the return of this liquid from these chambers

  bres are carried out by means of tubes which are not put in rotation. In this way, the arrival of hydraulic fluid in the piston cylinder and cylinder

  the centrifuge and the return are considerably sim-

plified.

  It goes without saying that different modifications can-

  will be brought by those skilled in the art to the mode of

  reading which has just been described only by way of nonlimiting example, in particular by substitution of equivalent technical means without thereby leaving the

field of the invention.

Claims (4)

R E V E N D I C A T I 0 N S   1 - Centrifuge with sliding element, the   centrifuge drum is fitted with a hydraulic cylinder   than piston and double acting cylinder which forms the mo-   teu of translation thus It of a mioteur mechanism die rotation, and in which the driving shaft of: pcanism   rotation motor consists of a hollow shaft   characterized in that the hydraulic piston and cylinder cylinder is arranged in the hollow shaft (1) of the mechanism motor in rotation.   2 - Centrifuge with sliding element according to claim 1, characterized in that the hollow shaft (1) forms the cylinder of the piston and cylinder jack,   in which the piston (2) is guided movable in translA-   axial tion, this piston being on the one hand, coupled in d-   intern placement on the centrifuge drum   diary of a piston rod (3) and, on the other hand, in   munication with conduits (5, 9, 10) used for ar: i   and when the hydraulic fluid returns and which are mobile dice in axial translation.   3 - Centrifuge with sliding element according to   one of claims 1 and 2, characterized in that   the piston (2) is provided with an axial bore (4) in the-   which opens the inner conduit (5) of arrival and return of hydraulic fluid.   4 - Centrifuge with sliding element according to   any one of claims 1, 2 and 3, character-   sée in that a bearing, in particular an axial stop (14), is interposed between the piston (2) and the conduits (5, 9, 10) serving for the arrival and return of the fluid hydraulic.