US 2023608 A
Description (OCR text may contain errors)
F. NEIBEL ROTARY PUMP Dec. 10, 1935.
2 Sheets-Sheet 1 Filed March 15, 1955 Faz Nebe/ F. NEBEL ROTARY PUMP Dec. l0, 1.935.
2 sheets-Sheet 2 Filed MaIGh 15, 1933 Franz Nebe/ /N VENTO/ Patented Dec. l0, 1935 UNITED STATES PATENT OFFICE ROTARY PUMP Franz Nebel, Vienna, Austria Application March 15, 1933, Serial No. 660,828 In Austria March 22, 1932 1 Claim. (Cl. 103-123) This invention relates to rotary pumps of the vention are shown by way of example in the actype in which therev are one or more tapered companying drawings, in which: conveyor chambers which are formed between Fig. 1 shows in vertical section a` pump in acthe casing wall, on the one side, and a substancordance with the invention.
5 tially radially directed surface on the rotor and Fig. 2 shows in part section and in part ele- 5 a surface on the latter obliquely inclined towards vation another form of pump in accordance with the casing wall, on the other side. the invention.
Rotary piston pumps of this type, are suit- Referring to the drawings, the pump consists able only for the conveyance of liquid matter, in the main -of the following parts: pump casbut do not permit of the conveyance of viscous ing l, rotary piston wheel or rotor 2, rotary feed- 10 to pulpy matter such as mud, slurry, dough, coner 5, baille slide 3, baille spring 4, yielding ap 6 crete or other matter intermixed with stones. with spring 1, and hopper 8.
The present invention has for its object to The mode of operation is as follows: The matprovide a pump of the nature indicated which ter to be pumped is placed in the hopper 8, and shall be capable of conveying not only liquid iS 111mg into the Dump Casing by the action 15 matter but also thick, heavily owing matter of the rotary or centrifugal feeder 5, so that intermingled with stones. Broadly, this object the spaces between the impelling projections 9 is achieved, in accordance with the invention, on the rotor 2 are lled out as completely as by the arrangement that the conveyor chambers possible. The direction of rotation of the rotor of the pump are tapered out or expanded in a iS indicated by the GIIOW il lIl the drawings, and 20 direction opposite to the direction of rotation of is also implied by the fact that the conveyor the rotor, and are terminated at their rear end chambers of the rotor 2 are tapered-in in the by a piston-like pressing surface which is disdirection of rotation of the rotor and taperedposed substantieuy radially to the rotor body. out in the opposite direction, and terminated by 20 Further features of the invention comprise the the Substantially radially disposed driving or provision at the end of the hopper of a rotary Dressing Surfaces 0f 'the impelling projections 9 feeder adapted to rotate in the opposite direcon the rotor 2, so that these surfaces act in the tion to the rotor and to feed the matter into manner of pistons to force the matter forward. the conveyor chambers, and also the provision, In view of the fact that the conveyor chambers beyond the rotary feeder, of a yielding member, are expanded or widened in a direction oppofor example a spring-laden flap or the like, which site that of rotation, stones or the like contained prevents stones or the like contained in the matin the matter pumped can not become clamped ter to be pumped from becoming jammed at this 0r jammed between the casing wall and the inpoint. clined surfaces of the rotor. The matter acted The pump according to the present invention is upon by the impelling projections 9 on the rotor distinguishable from known pumps intended for 21s then forced forward into the discharge branch the conveyance of thick or pulpy matter and h-av- I0 and thence into the delivery pipe I I. In order ing rotary piston surfaces obliquely inclined to that the matter shall in fact be able to pass into the casing wall in a direction opposite to that the discharge branch l0, the end 0f the Wall 0f of the rotation. The distinction consists in that this discharge branch l0 adjoining the rotor is instead of the oblique rotary piston surface being formed by d baille Slide 3 Which 1S attached t0 adjacent to a surface which extends to the casing a rocking lever I2 mounted outside the casing wall and which forms an acute angle there- 0f the Dump. and Which 1S acted UDOII by a with, increasing the danger of jamming in the spring 4 and projects, through packing, into the conveyor chambers, in the pump according tov interior of the casing. The end of the bafile slide the present invention the obliquely disposed sur- 3 bears, in consequence of the action of the face of each rotor compartment is adjacent to spring 4, against the outer surface of the rotor a surface which is substantially radially disposed, 2, and is caused to ride over the impelling proand which is perpendicular or approximately perjections 9 as the rotor revolves. It is forced up U0 pendicular to the tangent to the casing Wall. This against the spring I by the steep face of the 50 radial surface thus constitutes a pressing surface said impellers and pressed down again after travwhich acts in the manner of a piston upon the ersing the highest point, by the action of this matter pumped, so that the possibility of jamspring. This cycle is repeated during the pasming is effectually eliminated. sage of .each of the impelling projections 9, so Two forms of construction embodying the inthat the baille slide 3 prevents the matter from rotor 2.
becoming forced from the deliveryto the suction-side of the pump, and compels the same to pass on into the discharge branch I0. The rocking of the baille slide I about its axis oi oscillation I3 is rendered possible, in spite of the apparently unfavorable directions of drive, by the fact that favorable rotation moments are set up.
The ap 6 is serrated on its inner surface I4, and is adapted to yield against the action of the spring l. so that it eiiectually eliminates the possibility of the clamping or jamming of larger stones in the matter to bepumped.
In the form of construction shown in Fig. 2, which is intended more particularly for snow clearing, the casing I is attached by means of a bolt I5 to the front end of the chassis I6 of a vehicle, and is provided with a hopper I1 which is so disposed that when the vehicle travels in the direction of the arrow c the matter to be pumped is driven by the hopper straight on to the rotor 2, so that it fills the conveyor chambers automatically, and is thence forced into the riser II from which it is nally laterally discharged. For the purpose of rejecting larger stones and the like there is provided in the casing I a roller Il which is caused to revolve in the same direction as the About the axis of the roller I8 there is arranged to rock on an arm I! a plate 20 which bears of its own weight upon the road surface to be cleared. In order to permit of the circumvention of obstacles, such as projecting cobble stones, the said plate is provided on one side with a thrust rod 2I which is eccentricaly attached to a drum 22 upon which a tensile member, such as a cord 23, is adapted to be wound, thereby lifting the plate 20 over the obstacle. when this plate 5 is arrested relatively to the vehicle, since in this case the thrust rod 2l rotates the drum 22. The plate 20 receives the matter to be pumped lying upon the roadway and conducts the same over the upper outer surface or the arm I9, to the 1o rotor 2'. i
In a rotary piston pump for viscous material, a substantially cylindrical casing having an inlet and an outlet opening through its peripheral l5 wall, a rotor in said casing having a plurality of radial surfaces, the outer end of each radial surface being connected to the inner end of the succeeding radial surface, whereby there are formed between the casing and the periphery of the rotor 20 a plurality of conveyor chambers which taper in the direction of rotation of the rotor, and a baie slide mounted to oscillate about a point outside the casing and having a portion .spring urged into casing and into contact with the rotor periphery, 25 said baille portion separating the casing inlet from the outlet and being formed as an extension of that wall of the outlet which is anterior with respect to the direction of rotation.
` FRANZ NEBEL.