US3592572A

US3592572A - Pump particularly for pasty media

Info

Publication number: US3592572A
Application number: US830591A
Authority: US
Inventors: Karl Schnell
Original assignee: Individual
Current assignee: Individual
Priority date: 1968-06-04
Filing date: 1969-06-04
Publication date: 1971-07-13
Anticipated expiration: 1988-07-13

Abstract

A pump, particularly for pasty media, includes a housing having a suction inlet and a compression discharge passage and an intermediate vacuum exhaust outlet. An outer planetary gear is arranged within the cylindrical space of the housing and a pinion is maintained in engagement with the planetary gear by means of peripherally arranged spaced guide pieces. The rotation of the two gears permits the taking in of the material through the suction and the delivery through the outlet passage. The housing is arranged so that there is a peripheral portion between the suction and the outlet which provides an outer guide for the planetary gear and which forms a spacing between the inlet and outlet which is at least equal to the width of the space between the teeth of the planetary gear. In addition, there is a similar housing portion defined between the outlet and the vacuum exhaust outlet.

Description

United States Patent Inventor Appl. No. Filed Patented Priority PUMP PARTICULARLY FOR PAST Y MEDlA 1.902.315 3/1933 Vogt 103/126 (A) 2.159.720 5/1950 Wahlmarki 103/l26tA) 2.630.759 3/l953 Mahlon 103/126 (A) Primary Examiner-Carlton R. Croyle Assistant Examiner-Wilbur J. Goodlin Altomey-McGlew and Toren ABSTRACT: A pump. particularly for pasty media. includes a housing having a suction inlet and a compression discharge passage and an intermediate vacuum exhaust outlet. An outer 11 Cu 1 Dn'l" pm planetary gear is arranged within the cylindrical space of the housing and a pinion is maintained in engagement with the US. Cl. 418/169. planar Be by f pcriphcrany arrangcd spaccd 418/2 418/74 guide pieces. The rotation of the two gears permits the taking Int. Cl l-Olc 1/10 in of he mactia] mmugh he suction and the delivery hrough Field 01 Search 91/68; the outlet passage The housing is arranged so that thcrc is a peripheral portion between the suction and the outlet which provides an outer guide for the planetary gear and which Rama cued forms a spacing between the inlet and outlet which is at least UNn-ED STATES PATENTS equal to the width of the space between the teeth of the planel.604.802 10/1926 Brenzinger 103/126 (A) tary gear. in addition. there is a similar housing portion 9/1930 Moessinger 230/152 defined between the outlet and the vacuum exhaust outlet.

.1 l5 l T r" 3 s O O a i 4* 4! 29 2s r: 31"\" 2 PATENTEU JUL 1 319m SHEET 1 BF 2 PUMP PARTICULARLY FOR PASTY MEDIA SUMMARY OF THE INVENTION This invention relates to the construction of pumps and in particular to a new and useful pump particularly for pasty media having a rotating planetary wheel and a pinion with teeth in meshing engagement with the teeth of the planetary wheel and which includes housing wall portions, defining a peripheral spacing around the planetary wheel of a size comparable to at least the spacing of the gap between the gear teeth, and located between the suction and the compression outlet and the compression outlet and the vacuum outlet.

With pumps of the type with which the present invention is concerned it is considered to be disadvantageous to provide a great spacing between the suction inlet and the compression outlet. In some instances the spacing is offset almost over the entire circumference of the pumping gears. The result of this construction is that the material to be delivered is not treated very gently during the pumping operation.

In order to improve this situation it is proposed according to the invention to provide a relatively slight spacing between the suction duct inlet and the compression outlet, and, in respect to the direction of rotation of the planetary gears, the spacing of the interrupting wall corresponds substantially to the tooth gap width of the larger planetary wheel. In addition the vacuum exhaust is spaced beyond the compression exhaust by a similar spacing arrangement of a housing wall. The path to be travelled by the material is thus reduced to a minimum and for this reason the material is delivered substantially without being broken up or otherwise damaged during pumping.

If a pump is arranged so that its planetary wheel and meshing gear rotate about horizontal axes the inlet and the outlet will be arranged in the upper region of the pump housing. The material which passes through the gap between the planetary gear and the pinion gear falls directly into the teeth of the planetary wheel and is immediately transported up again, that is admixed to the fresh material. The danger of its being sucked off by the vacuum system is thus greatly reduced.

In a preferred arrangement of the invention a vacuum exhaust outlet is located at a distance corresponding approximately to the tooth gap width of the planetary wheel ahead of the compression duct outlet. This provides a technically attainable minimum distance for the path ofmovement of the material. The vacuum exhaust outlet is formed as a pocket in the pump housing which communicates with a duct. It thus encompasses a very large region within the housing. In one arrangement the duct provides a chamberlike enlargement having an inspection window which permits constant observation when the pump is running.

The pinion gear runs inside the planetary gear in an eccentric position relatively thereto which is maintained by a guide piece of two-part construction with at least one of the parts being removable. In this manner the arrangement of the gears can be adapted to the material to be conveyed. For coarse material a large guide piece is employed between the pump gears and for fine material a very small one approaching zero will be selected. The change of spacing can be achieved by using guide pieces of proportionate sizes, for example, a half size etc. Alternatively the guide piece may be mounted at a displaced location to provide the desirable intermeshing en gagement between the pinion and the planetary gears.

A particularly flat design pump is attained when the planetary gear and pinion meshing therewith and the guide piece are arranged such that the gears rotate about approximately vertical axes. In a preferred arrangement the filling or intake channel for the pump extends approximately parallel or inclined in relation to the shafts or axes of the pump gear wheels. This means that despite the horizontal design of the pump the conveyed material can be supplied from the top, which is of advantage in particular for manual charging.

A further feature of the invention is the arrangement of the two part guide pieces which are located between the peripheries of the planetary gear piece and the pinion gear. One part of the guide piece is advantageously arranged behind the point where the pump material is fed but ahead of the exhaust opening for the vacuum system and the other part is arranged ahead of the feeding point.

Accordingly, it is an object of the invention to provide an improved pump arrangement, particularly for pasty media which includes a housing having a pumping space with a planetary wheel and a pinion in meshing engagement therewith and which includes an inlet suction which is spaced in a circumferential direction in respect to the planetary gear rotation away from a compression outlet opening by distance which corresponds to the gap between the teeth of the planetary wheel, and wherein the housing also defines a vacuum exhaust outlet located beyond the compression outlet in respect to the direction of rotation of the gears and separated from the compression outlet by a wall spacing comparable to the gap width between the teeth of the planetary gears.

A further object of the invention is to provide a pump particularly for pumping pasty media which has an inlet arrangement which is advantageously arranged to receive material in a vertical loading direction and which also has an interior pump housing construction providing for a minimum pumping distance between the inlet and-the suction discharge in order to provide a minimum damaging effect on the material being pumped.

A further object of the invention is to provide a pump which is simple in design, rugged in construction, and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there are illustrated and described preferred embodiments of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS pump constructed GENERAL DESCRIPTION OF THE PREFERRED v EMBODIMENT Referring to the drawings in particular the invention embodied in FIG. 1 comprises a housing generally designated 2 which has a top inlet or suction passage 1 and a side outlet or compression duct 4. Material is transpor d from the suction duct 1 around through the pumping chamber and out through the outlet 4 in a direction of the arrow 5 by means of a planetary gear 6 in cooperation with a pinion 7 having teeth meshing therewith. Both bears 6 and 7 rotate in the direction of the arrow 8. y

In accordance with one feature of the invention, between the pinion 7 and the planetary gear 6 there is arranged a sickle-shaped guide piece 11 which is made up of two parts, a first part 9 located between the inlet 1 and the compression discharge duct 4 and a second part 10 located between the inlet 1 and a vacuum discharge-or passage 28. The guide piece 11 defines the engagement arrangement between the pinion 7 and the planetary gear 6 and itdefines a space 14 between the inlet 1 and the gaps 16 between the teeth 12 of the pinion 7. The material which is picked up by the rotation of the pinion 7 is delivered between the gaps 16 of the planetary gear 13. The material is conveyed in a direction of the inner compression duct outlets 17 to the compression outlet 4. Since the teeth of the pinion 7 come into engagement behind the tip 18 of the part 9 of the guiding piece 11, the material is pressed out of the tooth gaps and transported into the compression duct 4.

In respect to both the embodiments of FIGS. 1 and 2 between the inlet duct 1 and the outlet duct .17 the corresponding housing provides a peripheral guiding surface presenting a small spacing or distance 20 which corresponds to the tooth gap 15. The material is thus conveyed in the shortest possible path through the pump. The material which passes downwardly through the gaps 2i and 22, defined between the guide piece portion 10 and the teeth 6 of the planetary wheel and the teeth 12 of the pinion 7, is immediately transported around by the teeth 23 and 24 (which are indicated in both embodiments) and admixed to the freshly admitted material through the inlet 1.

In accordance with a further feature of the invention a vacuum pocket 26 is formed in the housing 2 at a slight spacing 25 from the compression outlet duct 17 which leads to the outlet 4. It has a circumferential outer wall 27 which is connected through a duct 28 to a vacuum exhaust conduit 29 which is connected to an exhaust device (not shown). An expansion chamber 30 is defined in the housing between the duct 28 and the duct 29. The expansion chamber 30 is closed at its exterior by an inspection window 31. This provides a means for readily observing whether the conveyed material is being drawn in by the vacuum pump connection at the duct 29.

In the slightly modified embodiment shown in FIG. 2 the parts are designated similarly but with a prime added thereto. The filling of the material is in the direction of the arrow? into the suction l and a discharge is out through the compression outlet in a direction of the arrow In this embodiment the suction duct 1' extends substantially vertically. The guidepiece 1 l is also designed as a two part arrangement including wedge-shaped part 9' and a multiformed sided part In contrast to the pump of FIG. 1, which includes the gear wheels 6 and 7 rotating about horizontal axes, in the embodiment of FIG. 2 the shafts of the pump gears 6 and 7 extend in a vertical direction. In other respects the embodiments of FIGS. 1 and 2 are similar.

I claim:

1. A pump, particularly for pasty media, comprising a housing defining a pumping space, a suction inlet passage, a compression discharge passage spaced peripherally in respect to said pumping space from said inlet passage, and a vacuum passage spaced peripherally from said compression discharge passage; a planetary gear rotatable in said pump pumping space and having gear teeth defining delivery gaps therebetween, a pinion having gear teeth engageable between the teeth of said planetary gear, guide piece means disposed between said planetary gear and said pinion gear and peripherally guiding said pinion gear to maintain it in engagement with said planetary gear, said housing peripheral spacing between said inlet passage and said compression discharge passage being in running peripheral engagement with said planetary gear and being of an extent at least equal to the spacing between the teeth of said planetary gear, and an expansion chamber portion formed in said connection between said vacuum conduit connection and said pocket.

2. A pump according to claim 1 wherein said vacuum passage is separated from said compression discharge passage by a portion of said housing which is in peripheral running engagement with said planetary gear and which is of a width corresponding to the gap between teeth of said planetary gear.

3. A pump according to claim 1, wherein said vacuum passage comprises an annular portion forming a pocket, a vacuum conduit connection, and a connecting passage between said conduit connection and said pocket.

4. A pump according to claim 1, wherein said housing includes a viewing window at the location of said expansion chamber.

5. A pump according to claim 1, wherein said guide piece means comprises two separate guiding parts located at spaced peripheral locations adjacent said inlet passage.

6. A pump according to claim I, wherein said housing pumping space permits said planetary gear and said pinion to rotate about a substantially vertical axis.

7. A pump according to claim 5, wherein said inlet passage extends substantially parallel to the axis of rotation of said pinion gear and said planetary gear.

8. A pump according to claim I, wherein said guide piece means comprises a first part located between said inlet passage and said delivery discharge passage and a second part located between said inlet passage and said vacuum passage.

9. A pump according to claim 1, wherein said guiding piece means includes a first sector-shaped member disposed between said pinion gear teeth and said planetary gear teeth and located between said inlet passage and said compression discharge passage, a second guide piece member disposed between said planetary gear teeth and said pinion gear teeth 'and located at a spaced location from said inlet passage in a direction toward said vacuum passage.

10. A pump, particularly for handling pasty media, comprising a housing defining a pumping space a suction inlet passage a compression discharge passage spaced peripherally in respect to said pumping space from said inlet passage and a vacuum passage spaced peripherally from said compression discharge passage, a planetary gear rotatable is said pump pumping space and having gear teeth defining deliverygaps therebetween, a pinion having gear teeth engageable between the teeth of said planetary gear, said pinion defining an ecgentric gap in respect to said planetary gear, guide piece means disposed in said eccentric gap and peripherally guiding said pinion gear to maintain it in engagement with said planetary gear, and a vacuum connection connected into the periphery of said pumping space between said inlet and said discharge passage and having a pump evacuating connecting line for eliminating air from said pumping space.

11. A pump, according to claim 10, wherein said pump comprises a horizontally arranged pump, said planetary gear being rotatable about a vertical axis, said inlet extending substantially parallel to the pinion gear axis.

Claims

6. A pump according to claim 1, wherein said housing pumping space permits said planetary gear and said pinion to rotate about a substantially vertical axis.

8. A pump according to claim 1, wherein said guide piece means comprises a first part located between said inlet passage and said delivery discharge passage and a second part located between said inlet passage and said vacuum passage.

9. A pump according to claim 1, wherein said guiding piece means includes a first sector-shaped member disposed between said pinion gear teeth and said planetary gear teeth and located between said inlet passage and said compression discharge passage, a second guide piece member disposed between said planetary gear teeth and said pinion gear teeth and located at a spaced location from said inlet passage in a direction toward said vacuum passage.

10. A pump, particularly for handling pasty media, comprising a housing defining a pumping space a suction inlet passage a compression discharge passage spaced peripherally in respect to said pumping space from said inlet passage and a vacuum passage spaced peripherally from said compression discharge passage, a planetary gear rotatable is said pump pumping space and having gear teeth defining delivery gaps therebetween, a pinion having gear teeth engageable between the teeth of said planetary gear, said pinion defining an eccentric gap in respect to said planetary gear, guide piece means disposed in said eccentric gap and peripherally guiding said pinion gear to maintain it in engagement with said planetary gear, and a vacuum connection connected into the periphery of said pumping space between said inlet and said discharge passage and having a pump evacuating connecting line for eliminating air from said pumping space.