FR2703408A1 - Universal rotary vane pump. - Google Patents

Abstract

The invention relates to a universal vane pump, capable of sucking either more or less viscous liquids or pasty, granular or fibrous materials, of the type essentially comprising a stator with a cylindrical bore, an eccentric cylindrical rotor bearing, at its periphery. , at least two articulated, removable paddles, an inlet port and an outlet port. The pump, according to the invention, is characterized in that its rotor (2) has recesses (14), opening out on its periphery, capable of completely accommodating the vanes (3) and simultaneously containing the product to be pumped; in that the inlet (5) and outlet (6) openings, during the suction and delivery phases, open into the area cleared by said recesses and in that the leading edges of the rotor (10) and paddles (17, 18) and the trailing edges (11) of the inlet and outlet ports function as a shear.

Description

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  ROTATING PUMP WITH UNIVERSAL PALLET

  The invention relates to a universal vane pump, capable of sucking indifferently more or less viscous liquids or pasty, granular or fibrous materials, of the kind comprising essentially a

  chamber defined by a stator with cylindrical bore and two lateral flanges.

  circular rings; a cylindrical rotor eccentric to said chamber

  carrier, at its periphery, at least two articulated and removable pallets

  ble; an inlet port and an outlet port.

  Known pumps of the kind in question are essentially described in the following patents:

  EP-507200 (VEMAG) which discusses a vane pump designed for use with

  mainly used in the food industry for pumping viscous substances and having a lateral inlet, a radial outlet, a rotor centered with pivoting fins, removable, whose inclination

  is a function of the spiral shape of the stator Each stem has a

  and a wheel in a slide The pump in question is

  sophisticated design, easy dismantling (essential in agro-

  food) and poorly adapted to treat granular and fibrous

his (meat for example).

  FR-2569782 (SKF Gmbh) which deals with a vane pump which serves essentially

  of a vacuum braking device in a vehicle with an internal combustion engine and comprising a housing and an eccentric circular rotor carrying four articulated pallets held in contact with the bore of the engine.

  crankcase by means of pressure springs the pallets are housed partially

  in recesses on the periphery of the rotor.

  The question essentially concerns the means of fixing the springs

  if we. FR-2576366 (PIERBURG Gmbh) which deals with a vane pump which comprises a rotor carrying pallets housed in peripheral recesses and provided with torsion springs and FR-2576367 of the same applicant which deals with a

  improvement concerning pallets only, which consists of

  grooves which are intended to reduce at least the forces of adhesion

  ence. The object of the invention is to provide a pump of the kind in question which can treat indifferently more or less viscous liquids or substances

  pasty, granular or fibrous; simple design at the puck

  -2- those that no longer have a pressure spring and at the holes

  input and output devices that include simple means for shearing

  fibrous materials; easily removable for cleaning and for

  replacement of defective parts.

  The rotary vane pump, according to the invention, is characterized in that the rotor has recesses, opening on its periphery, able to completely house the pallets and simultaneously contain the product to be pumped; in that the inlet and outlet ports, during the suction and discharge phases, open into the area cleared by said recesses and in that the leading edges of the rotor and vanes and the trailing edges of the Inlets and outlets work the way

of a shear.

  The features and advantages of the invention will appear

  more clearly on reading the following detailed description of a

  preferred embodiment of the invention given by way of non-limiting example

  and shown in the accompanying drawings.

  In these drawings: FIG. 1 is an internal front view of the pump;

  Figure 2 is a sectional side view of the pump according to AA.

  The pump shown in the figures comprises a stator (1) with a cylindrical bore; a rotor (2), cylindrical, eccentric with respect to said bore, having recesses (14), opening at its periphery, able to completely house the pallets (3) and simultaneously contain the product to be pumped; at least two pallets (3), articulated and removable, pivotally attached to the periphery of the rotor by means of cylindrical openings opening (15),

  partially open, in which the cylindrical end (4) of the

  lette, acting as an axis, is housed by slipping nesting; an inlet (5) and an outlet (6) opening into the area evicted by the recesses (14) during the suction and discharge phases; a rear flange and a front flange (8), for example screwed into the stator, with the latter delimiting the pump chamber;

  a rotor drive shaft (9) having a feather key (16)

rotational rusting.

  Thus realized, the rotor comprises leading edges (10) and trailing edges (12); The inlet and outlet ports comprise trailing edges (11) and trailing edges (13); the pallets have lateral leading edges (17)

and end (18).

  The leading edges of the rotor and vanes and the trailing edges of the inlet and outlet ports function as shears. In the preferred embodiment of the invention, as shown in the figures, the inlet and outlet openings open entirely into

  the area swept by the solid parts of the rotor.

  According to a first variant of the invention (not shown), the inlet and outlet openings open, partly, in the zone swept by the solid parts of the rotor and, in another part, in the zone swept by the

side edges of the pallets.

  According to a second variant of the invention (not shown), the inlet and outlet openings open into the cylindrical zone of the bore of the

  stator swept by the extreme edges (18) of the pallets.

  The leading edges of the rotor and vanes and the trailing edges of the

  inlet and outlet ffts, which are perpendicular to the bearing planes of said orifices, may be oblique with respect to said planes so as to

  to form with these an appropriate cutting angle.

  The leading edges of the rotor and vanes and the trailing edges of the

  entrance and exit fonts, which are rectilinear, may have a shape

  appropriate curve to make the shear progressive.

  The extreme edges of the pallets can also be oblique with respect

  the rays of the bore at the point of their passage over the perimeter

tangential phériques.

  The front and rear flanges can be fixed by screws.

  The rotor is immediately removable by simply sliding along its

  axis once the flange before disassembled.

  The pallets are immediately removable by simply sliding along

of their accommodation.

  In the preferred embodiment of the invention the areas of the recesses and solid parts of the rotor are identical; the inlet and outlet ports have dimensions and a position such that the solid portions of the rotor alternately close them; the outlet is positioned in such a way that the beginning of its

  when the rotor moves, coincides with the beginning of the closing.

  4-ture the lower pallet so that there is no compression of the product to be conveyed inside the pump body; the shearing effect is exclusively ensured by the leading edges of the rotor recesses and the trailing edges of the outlet orifice at the time of sealing, which makes it possible, in case of pumping of fibrous products,

  like meat, to sever the parts of matter on horseback between

the pump and the orifices.

  Plating of the vanes against the stator bore is achieved by the combined action of the centrifugal force and the counterpressure exerted by the

  compressed material in the rotor recesses.

  Such a configuration allows manual disassembly, without any tools, simple

and fast rotor and pallets.

  This advantage is extremely important in the food industry.

  daily disassembly is necessary for cleaning and disinfection.

  The pump according to the invention may for example be made of stainless steel

  The speed, which is of the order of 100 revolutions per minute for this type of application, could be much more important and

  use of ceramic materials for the friction parts.

  Of course, the invention is not limited to the embodiments described and shown for which other variants may be provided mainly: in the shapes and dimensions; number of pallets and inlet and outlet ports;

  without departing from the scope of the invention.

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Claims (8)

  1 Rotary vane pump, suitable for sucking up liquids   more or less viscous or pasty, granular or fibrous   its, of the kind essentially comprising a chamber defined by a stator   with cylindrical bore and two circular side flanges; a cylindrical rotor   drique, eccentric with respect to said chamber, carrying, at the periphery, from   minus two articulated and removable pallets; an inlet and an opening   exit fee; characterized in that the rotor (2) has recesses (14), opening on its periphery, able to completely house the pallets (3) and simultaneously contain the product to be pumped; in that the inlet (5) and outlet (6) ports, during the suction and discharge phases, open into the area disengaged by said recesses and in that the leading edges of the rotor (10) and vanes (17,18) and trailing edges (11) of the orifices   Inlet and outlet work in the manner of a shear.   2 Pump according to claim 1, characterized in that the openings   entrance and exit, located on one of the flanges, open completely   in the area swept by the solid parts of the rotor.   3 Pump according to claim 1, characterized in that the openings   inlet and outlet, located on one of the flanges, partly open into the area swept by the solid parts of the rotor and, for other   part, in the area swept by the pallets.   4 Pump according to claim 1, characterized in that the openings   entrance and exit, which are located in the cylindrical zone of   the bore of the stator (1), are swept by the extreme edges (18) of the pallets.   your. Pump according to claim 1, characterized in that the edges   of the rotor and the vanes and the trailing edges of the orifices   trea and outlet, are oblique with respect to the lateral plane of the flange   carrier of the entry and exit ports.   Pump according to claim 1 or claim 5, characterized in that the leading edges of the rotor and vanes and the trailing edges.   inlet and outlet ports have a curved shape.   7 Pump according to claim 4, characterized in that the end edges of the vanes are oblique with respect to the radii of the bore at   moment of their passage in the tangential peripheral openings. -6-   8 pump according to claim 1, characterized in that the front flanges (8) and rear (7) are fixed by screws.   9 pump according to claim 8, characterized in that, once the front flange removed, the rotor is immediately removable by simple sliding along its axis.   Pump according to claim 9, characterized in that the pallets are immediately removable by simply sliding in their housing (15).