DE77631C - Pump with automatic pressure control - Google Patents
Pump with automatic pressure controlInfo
- Publication number
- DE77631C DE77631C DENDAT77631D DE77631DA DE77631C DE 77631 C DE77631 C DE 77631C DE NDAT77631 D DENDAT77631 D DE NDAT77631D DE 77631D A DE77631D A DE 77631DA DE 77631 C DE77631 C DE 77631C
- Authority
- DE
- Germany
- Prior art keywords
- pump
- pressure
- air
- pressure control
- automatic pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000004048 modification Effects 0.000 claims 1
- 238000006011 modification reaction Methods 0.000 claims 1
- 230000001105 regulatory Effects 0.000 claims 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M buffer Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 230000001143 conditioned Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
- F04B49/121—Lost-motion device in the driving mechanism
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
- F04B53/144—Adaptation of piston-rods
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Description
KAISERLICHESIMPERIAL
PATENTAMT.PATENT OFFICE.
KLASSE 59: Pumpen.CLASS 59: Pumps.
Bei der Construction des Haupt-Patentes hat es sich herausgestellt, dafs bei geringen Undichtigkeiten des Kolbens bei der Anwendung der Prefsluftbuffer Unregelmäfsigkeiten in der Federwirkung entstehen, welche den gleichmäfsigen Gang der Pumpe beeinträchtigen. Aufserdem ist es unmöglich, den Anfangsdruck auf die Dauer höher als den normalen Druck der Aufsenluft zu erhalten.During the construction of the main patent it was found that with minor leaks of the piston when using the Prefsluftbuffer irregularities in the Spring effects arise, which impair the smooth running of the pump. In addition, it is impossible to keep the initial pressure higher than normal pressure in the long run the outside air.
Es hat sich ferner herausgestellt,, dafs eine Verdoppelung des Antriebshubes zwecks Herstellung des nöthigen Luftüberdruckes in den Prefsluftcylindern Ungenauigkeiten hervorrief, und dafs eine Regulirung in weiteren Druckgrenzen, bedingt durch das verhältnifsmäfsig geringe Cylindervolumen, und namentlich eine genaue Regulirung des Druckes der Förderpumpe nicht möglich war.It has also been found that a doubling of the drive stroke for the purpose of production the necessary excess air pressure in the pre-air cylinders caused inaccuracies, and that there is a regulation in further pressure limits, conditioned by the relative small cylinder volumes, and especially precise regulation of the pressure of the feed pump was not possible.
Um diese Uebelstände zu vermeiden, werden die Luftbuffer durch eine bewegliche Verbindung (Schläuche) mit einem Prefsluftspeicher verbunden, der seinerseits wieder durch eine kleine Druckpumpe gespeist wird, die in dem Luftspeicher und in den Cylindern die gewünschte Spannung erzeugt und — im Fall von Undichtigkeiten — Verlust an Prefsluft ergänzt. Ein Sicherheitsventil auf dem Luftspeicher hält den Druck stets constant.In order to avoid these inconveniences, the air buffers are connected by a flexible connection (Hoses) connected to a Prefsluftspeicher, which in turn through a small pressure pump is fed, the desired in the air reservoir and in the cylinders Voltage is generated and - in the case of leaks - loss of pre-filled air added. A safety valve on the air reservoir keeps the pressure constant.
Fig. ι und 2 zeigen die Anordnung in Ansicht, den Prefsluftcylinder geschnitten und in Draufsicht.Fig. Ι and 2 show the arrangement in view, the Prefsluftcylinder cut and in Top view.
Von der Triebwelle A aus wird mittelst der beiden Kurbeln BjB die oscillirende Kolben-· stange der Prefsluftcylinder EE bewegt. Die beiden Prefsluftcylinder sind durch Pleuelzapfen G mit einander und durch die Schläuche MM mit dem Prefsluftspeicher N verbunden. Die Kolbenstangen CC haben die Fortsetzungen c c, welche sich in die geschlossenen Kolbenstangenhülsen FF erstrecken, bei d geführt sind und durch die Schraubenmuttern e noch das Hinausschieben des Kolbens D aus dem Cylinder verhindern. Die Druckpumpe Q. speist den Prefsluftbehälter 2V, aus dem die überschüssige Luft durch das Sicherheitsventil Ä entweicht. Der Pleuelzapfen G greift in dem Lager H der gerade geführten Kolbenstange an und bewegt so den Pumpenkolben in dem Cylinder P.The oscillating piston rod of the pre-air cylinder EE is moved from the drive shaft A by means of the two cranks BjB. The two pre-air cylinders are connected to one another by connecting rod journals G and to the pre-air reservoir N by means of the hoses MM . The piston rods CC have the continuations cc, which extend into the closed piston rod sleeves FF , are guided at d and prevent the piston D from being pushed out of the cylinder by the screw nuts e. The pressure pump Q. feeds the 2V pre-air tank, from which the excess air escapes through the safety valve Ä. The connecting rod pin G engages in the bearing H of the piston rod that is being guided and thus moves the pump piston in the cylinder P.
Solange der Druck auf den Kolben im Cylinder geringer als der Druck auf die beiden Kolben D ist, werden diese ihre äufserste Stellung im Cylinder beibehalten, und das ganze Gestänge wird wie ein steifes Gestänge arbeiten.As long as the pressure on the piston in the cylinder is less than the pressure on the two pistons D , they will maintain their outermost position in the cylinder, and the whole linkage will work like a rigid linkage.
Sobald der Druck im Pumpencylinder den Druck gegen die beiden Kolbencylinder D übersteigt, fangen diese an, in ihren Cylindern zu spielen, ohne die Kolbenstange K zu bewegen, so dafs beim geringsten Ueberdruck ein vollständiger Stillstand des Arbeitskolbens, der dabei in äufserster Rechtslage verharrt, zu erreichen ist.As soon as the pressure in the pump cylinder exceeds the pressure against the two piston cylinders D , these begin to play in their cylinders without moving the piston rod K , so that at the slightest overpressure the working piston comes to a complete standstill, which remains in the extreme right position is to achieve.
Die Kolben in den Prefsluftcylindern können auch durch eine Membran ersetzt werden.The pistons in the pre-air cylinders can also be replaced by a membrane.
Claims (1)
Publications (1)
Publication Number | Publication Date |
---|---|
DE77631C true DE77631C (en) |
Family
ID=350425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT77631D Expired - Lifetime DE77631C (en) | Pump with automatic pressure control |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE77631C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018855A1 (en) * | 1979-05-08 | 1980-11-12 | Sugino Machine Limited | Variable pressure and displacement reciprocating pump |
-
0
- DE DENDAT77631D patent/DE77631C/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0018855A1 (en) * | 1979-05-08 | 1980-11-12 | Sugino Machine Limited | Variable pressure and displacement reciprocating pump |
US4500262A (en) * | 1979-05-08 | 1985-02-19 | Sugino Machine Limited | Variable pressure and displacement reciprocating pump |
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