FR2463862A1 - PISTON PUMP AND SELF ALIGNMENT LIGHT PLATE FOR THIS PUMP - Google Patents

Abstract

ALTERNATIVE PISTON PUMP EXECUTING A REVOLUTION MOVEMENT IN A ROTARY MOTOR BLOCK. THE MOTOR UNIT 21 BEATS UP AGAINST THE COVER 13 A LIGHTS OF THE CRANKCASE 10 VIA A LIGHTS PLATE 50 MAKING THE CYLINDERS 27 OF THE ENGINE UNIT 21 COMMUNICATE WITH THE LIGHTS OF THE CRANKCASE 10. THE PLATE 50 AND ITS ELEMENT SUPPORT 40 HAVE SURFACES TURNED TO ONE THE OTHER WHICH ARE SPHERICAL 53, 43 AND COMPLEMENTARY, SO THAT THESE TWO PIECES 50, 40 CAN EXECUTE RELATIVE MOVEMENTS AND THAT FACE 52 APPLIED AGAINST THE MOTOR BLOCK 21 CAN FOLLOW OSCILLATIONS WHEN THE PUMP IS TURNING VERY FAST. GENERAL APPLICATION TO PUMPS, WITH PISTONS DISTRIBUTED AROUND A SYMMETRY AXIS, IN A ROTARY MOTOR BLOCK.

Description

The invention relates to piston pumps and light trays to

self-alignment intended

  to these pumps and more particularly to a pis-

  around a center around which they perform

  cut a movement of revolution or arranged on the side of a center, pump, tray with lights in two pieces

  self-aligning, these two parts having sur-

  spherical bearing faces that maintain alignment

  tray and moving parts of the pump.

  Piston pumps distributed around a cen-

  and those with pistons on one side of a center have been used for a long time to deliver a hydraulic fluid under pressure in many systems

  different. These pumps operate by movement of

  evolution of several pistons on gliding soles

  mounted on a sloping platform inclined on the axis and which

  poses reciprocating pistons in cylinders of a rotating engine block or piston holder

  on a tray with lights. Unfortunately, the increase

  The speed of these pumps increases the tilting of the rotary engine blocks and increases the wear and misalignment of the light plate relative to the engine blocks. To reduce the influence of this effect, the engine block is provided with an end ofarbredisposéel end opposite the celltre the control shaft and mounted coaxially thereto. This shaft end is mounted in a bearing

  from the end of the crankcase of the engine block. However,

  the addition of this shaft end, the engine block is inflectedlightly relative to the light tray with consequent inequality of wear. It has been suggested to overcome this secondary problem by adding

  plastic support blocks on the tray.

  lights, these blocks of support helping to solve the problem by yielding under the effect of pressure and spreading the load. Although these blocks reduce the acuity of the problem in the short term, they are subject to wear

  and finally lose their effectiveness.

  Another serious problem raised in this type of pump lies in the cost and difficulty of observing the necessary tolerances of manufacture of the pads, because the adjustment of the light tray is difficult. The subject of the invention is a pump providing

  a solution to these problems by using a

  which is in two parts having between them spherical and complementary bearing surfaces that allow relative movement between these two parts

  and thus allow a plateau surface to bend

  in order to follow the tilting movement of the engine block and thus to completely eliminate the problem

misalignment.

  The subject of the invention is therefore a pump with

  alternate shades around a center or side

  center, this pump comprising a rotating motor unit

  tif in a housing and having cylinders distributed about an axis of symmetry and in which the pistons are movable alternately, a control shaft being intended to rotate the engine block and being mounted at one end of said axis of symmetry, a tip engine block shaft mounted at the other end of the axle

  of symmetry and journalled in said housing, a

  biased biasing beam mounted in the housing being in contact with said pistons so as to adjust their reciprocating movement in the engine block, a mechanism for adjusting the inclination of said biasing plate mounted in the crankcase - the latter including engine lights; inlet and outlet disposed spaced apart from each other and a substantially annular shaped light tray being mounted between said intake and exhaust ports and the engine block so as to surround said shaft end, said light tray comprising on one side a flat surface bearing against the engine block around the shaft end, the lights of this plate communicating the engine block and the housing lights, said light tray having on the other side a substantially spherical surface and a support element mounted in the casing having a corresponding spherical surface against which the spherical surface of the light tray re is applied, this supporting element bearing com- corresponding apertures, so that said

  light tray can move around said overhead

  spherical face so as to follow the movements of

  tilting or tilting of the engine block into

  is lying. The light tray and the support member are preferably two separate pieces whose combined thickness corresponds to a standard one-piece light tray used in reciprocating piston pumps distributed around a center and therefore these two parts. 1.5 parts can be used in any conventional pump of this type with pistons distributed around a center or a side of a center, that is to say in any sloping platform pump on the axis, without it is necessary to make modifications to the pump; however, it would be possible to secure the support element with the housing and to realize it in one

  piece with the lid against which the

  lighted water. This light tray has pre-

  interference of annular and radial circulation grooves

  lubrication oil wear surfaces.

  The invention will be described in more detail with reference to the accompanying drawings by way of non-limiting examples and in which: FIG. 1 is a diagrammatic axial section;

  of an exemplary embodiment of an alternating piston pump

  native speakers distributed around a center, this pump being equipped with a light tray according to the invention; FIG. 2 is a plan view of the support element of the light plate of FIG. 1; - Figure 3 is a cross section along the line III-III of Figure 2; FIG. 4 is a plan view of the actual light tray of the embodiment of FIG.

figure 1; -

  - Figure 5 is a cross section along the line V-V of Figure 4; FIG. 6 is a cross-section on an enlarged scale of the group formed by the support element and the light tray of the invention; FIG. 7 is a plan view of the support element of the light plate of a piston pump distributed on one side of the center; - Figure 8 is a cross section along the line VIII-VIII of Figure 7; Fig. 9 is a plan view of the actual light tray of the tray and support member group; and - Figure 10 is a cross section according to

the line X-X of FIG.

  Figure 1 illustrates an alternate piston pump

  natives distributed around a center and comprising a housing 10 in which a control shaft It is mounted in bearings 12 at one end. The other end of the housing 10 is closed by a perforated cover 13 which is fixed on the carter by not shown bolts and which bears against the latter through a seal-tee-14. A tilting plate 15 on one axis is articulated on one side 16 on an axis 17 and it is connected by joints on the diametrically opposite side 18 to an operating piston 19 by means of a rod 20. A

  cylindrical engine block 21 is keyed to the drive shaft

  It encloses the housing 10 and has upper and lower shaft ends 22 and 23 journalled in bearings 24 and 25 disposed in the housing 10.

  on the one hand and in the lid 13 on the other. The pis-

  26 are alternately movable in cylinders 27 of the engine block 21 and are moved by soles

  sliding members 28 assembled with ball joints 29 of the

  The sliding soles 28 move on a support plate 30 carried by the biasing plate 15 and are held in place by an abutment ring 31. The reciprocating movement of the pistons

  26 in the cylinders 27 is thus controlled by the inclination

  15. All the elements described are classic. A support element 40 and a plateau 50 with lights

  are mounted between the engine block 21 and the cover 13.

  The support member 40 has a flat surface 42 on one side and a convex, substantially spherical surface 43 on the other side. The light tray 50 has a

  flat bearing surface 52 which is applied against the former

  tremity of the motor unit 21 and a spherical concave surface

  53 which is complementary to the surface 43 against which it is applied. In the normal position,

  surfaces 42 and 52 are parallel; however, depending on

  when the engine block 21 undergoes a slight flip-flop

  as such is the case in all pumps operating

  At high speed, the bearing member 40 and the light plate 50 are movable relative to each other on the complementary surfaces 42 and 52, so that the surface 53 is kept in regular contact with the top of the engine block 21 and that the surface 43 remains in contact with the perforated lid 13. The support element

  and the plate 50 each comprise on the opposite sides

  a series of lights 44, 45 and 54, 55 which

  pour from side to side, which are aligned and therefore communicating. These lights communicate through the element 40 and the plate 50 the end of the top of the engine block 21 with an intake port and an outlet port (not shown, but conventional) perforated cover 13. The plate 50 comprises on the support surface

  plane 52 an annular groove 56 disposed between the

  54 and 55 and its outer circumference, as well as radial grooves 57 which go from the annular groove 56 to its outer circumference. The support element 40

  likewise on the flat surface 42. an annular groove

  46 Located between the apertures 44, 45 and the outer circumference, as well as radial grooves 47 which

  from the annular groove 46 to the outer circumference.

  These grooves are channels of lubrication and sealing. s The light plate unit used in a piston pump located on one side of a center is

  shown in Figures 7 to 10. This group is

  the same as that of the light stage group of a piston pump distributed around a center, except that the lights and the similar holes bear the same reference numerals, but with a prime sign. A support member 40 'and a light tray 50' constitute the group rising between the motor unit and the perforated cover. The support element 40 'has a flat surface

  42 'on one side and a convex surface, substantially spherical

  43 'on the other side. The light tray 50 '

  has a flat support surface 52 'and a concave surface

  spherical ve 53 'which is complementary to the convex surface 43' and which bears against it. The support element 40 'and the plate 50' each have on one side a series of lights 60, 61, 62 which pass right through them, which are aligned and therefore which communicate

  as well as a light 63 on the other side of a line dia-

  metric, conventionally for the light trays pumps of this type. The plate 50 'has an annular groove 56' and radial grooves 5 '7' and the element 'has an annular groove 46' and radial grooves

  47 'which constitute channels of lubrication and water

  chéité. It goes without saying that the invention has not been described

  as an example and that it is likely to

  its modifications without leaving its domain.

Claims (6)

  1. Piston pump comprising a housing (10), a rotary engine block (21) in the housing having cylinders (27) spaced apart from each other about an axis of symmetry, pistons (26) being alternatively in said cylinders (27), a   control shaft (11) being adapted to rotate the   said engine block (21) about said axis of symmetry, a tilting plate (15) arranged obliquely and mounted in said housing (10) being in contact with the pistons (26) so as to adjust their reciprocating movements in said cylinders (27). ), a mechanism (17, 19, 20) mounted   in said housing being intended for adjusting the inclination   tilt plate (15), said housing (10) com-   carrying intake and output ports, characterized in that it comprises a substantially annular plate (50) with slots (54, 55) which is mounted between said housing slots (10) and the engine block   (21) about said axis of symmetry, this plate (50) com-   carrying on one side a substantially flat surface (52) which bears against the engine block (21), the slots (54,) of said plate (50) communicating therethrough the engine block (21) and the crankcase lumens (10), said plate (50) having on the other side a   substantially spherical surface (53); as well as   support member (40) mounted in the housing (10) and having a surface. spherical (43) which is complementary to the spherical surface (53) of the light plate (50) and against which the latter (53) bears, said   support element (40) comprising corresponding lights   dantes (44, 45) which communicate with those (54, 55) of the light tray (50) so that said   lights (50) can move on said spherical surface   (43) to follow tilting movements   or tilting the motor unit (21) in operation.   2. Piston pump according to claim 1, characterized in that the motor unit (21) comprises at each end a shaft end (22, 23) which pivots. in the housing (10).   3. Piston pump according to one of the claims   1 and 2, characterized in that the plateau   (50) and the support element (40) are independent annular elements having on one side concave (53) and convex (43) complementary surfaces and,   on the other side flat bearing surfaces (52, 42).   Piston pump according to Claim 3, characterized in that the bearing element (40) comprises   a convex spherical surface (43) and the plateau   (50) has a concave spherical surface Complementary (53) .-   5. Piston pump according to one of the claims   3 and 4, characterized in that the flat surface   (42, 52) of the support element (40) and the   (50) has annular grooves (46, 56)   between said lights (44, 45; 54, 55) and their cir-   outdoor conference, as well as radial grooves   (47, 57) disposed between the corresponding annular groove   dante and their outer circumference.   6. Piston pump according to claim 3, characterized in that the combined thickness of the separate parts, consisting of the support element (40) and the light plate (50), is substantially equal to the thickness of the classic light tray in one piece, for said pump.