Pumps – Three or more cylinders arranged in parallel – radial – or...
Patent
1980-02-14
1982-12-28
Freeh, William L.
Pumps
Three or more cylinders arranged in parallel, radial, or...
91507, 74 60, F04B 118
Patent
active
043659403
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Technical Field
The present invention relates to a rotary piston pump, and more particularly to a rotary piston pump of the axial type. There have hitherto been known rotary piston pumps of the radial type in which the pistons are arranged vertically to the driving shaft and of the axial type in which the pistons are arranged in parallel with the driving shaft. Each of these two types further have rotatable cylinders or fixed cylinders. The present invention relates to a novel rotary piston pump of the axial type with fixed cylinders.
2. Background Art
The conventional rotary piston pump of the axial type with fixed cylinders has been, for example, so constructed as a plurality of cylinders are arranged symmetrically around the driving shaft, to which the disk inclined with predetermined angle to the vertical plane to said shaft is anchored coaxially. Outer ends of piston rods or plungers fit in said cylinders and closely contact the corresponding side of said inclined disk, whereby the plungers or pistons repeat reciprocation through the inclined disk with the rotation of the driving shaft, resulting in alternative operation of the suction valves and delivery valves both set in the cylinders (see for example, Handbook of Hydraulic Mechanical Engineering, Revised Edition, pages 443-447, published by Corona Publishing Co., Ltd., on Feb. 20, 1972).
The conventional apparatus as above has advantages that it can be designed compactly and that it may be applied to a high pressure system with good efficiency, however, it has, on the other hand, such disadvantages that strict accuracy is required in the sliding faces and in sealing parts included in the apparatus and further that the operating fluids of low lubricity such as water and the like cannot be applied thereto.
Disclosure of Invention
The present invention resides in the rotary piston pump of the axial type with fixed cylinders, wherein a plurality of cylinders are arranged symmetrically around and in parallel with the driving shaft. The pistons or plungers are fitted in these cylinders and repeat reciprocation with rotation of the driving shaft so that the fluid suction valves and delivery valves in the cylinders operate alternatively. The invention is characterized in that a flywheel of rotary drum shape is coaxially anchored to the drive shaft, on the circular side of which flywheel is engraved one continuous oblique groove taking the form of one cycle sine curve on the development view of said circular side, while the outer ends of the piston rods of pistons or of plungers are connected with said oblique groove.
According to the apparatus of the present invention, the flywheel of rotary drum shape is employed as a main driving mechanism so that large scale apparatus may be designed. Further, according to the apparatus of the invention, apparatus with a few sliding faces in its parts can be designed. Moreover, in the apparatus, besides oil, the operating fluids having low lubricity, e.g., water and the like, may also be applied thereto.
BRIEF DESCRIPTION OF DRAWINGS
Each of FIGS. 1 and 2 is a vertical sectional view of a preferred embodiment of the apparatus according to the present invention, which view includes the axes of the corresponding piston rod and driving shaft and in which the oblique groove of the flywheel appears at the end of a circular side of said wheel (providing that the oblique groove is simply shown straight in the lengthwise direction).
FIGS. 3 and 4 illustrate perspective views of the flywheels of the apparatus in FIGS. 1 and 2, respectively.
FIG. 5 illustrates a fragment of enlarged perspective view of the fixed shaft of the apparatus in FIG. 1.
FIG. 6 illustrates an enlarged perspective view of the connecting portion of the end grip of a piston rod with the intermediate part of the lever of the apparatus in FIG. 1.
FIG. 7 illustrates an enlarged perspective view of the end grip of a piston rod of the apparatus in FIG. 2.
BEST MODE FOR CARRYING OUT THE INVENTION
Referring to FIG. 1, a driving shaft 1 of
REFERENCES:
patent: 643918 (1900-02-01), Textorius
patent: 1521364 (1924-12-01), Froelich
patent: 1661582 (1928-03-01), Szydlowski
patent: 2669185 (1954-02-01), Tallis
patent: 3598094 (1971-08-01), Odawara
patent: 3663226 (1972-05-01), Biermann
LandOfFree
Rotary piston pump of axial type does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary piston pump of axial type, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary piston pump of axial type will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1335372