US3915259A - Control system for reversing a two-line central lubricating system - Google Patents

Control system for reversing a two-line central lubricating system Download PDF

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Publication number
US3915259A
US3915259A US397653A US39765373A US3915259A US 3915259 A US3915259 A US 3915259A US 397653 A US397653 A US 397653A US 39765373 A US39765373 A US 39765373A US 3915259 A US3915259 A US 3915259A
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United States
Prior art keywords
piston
lubricant
cylinder
alternately
pump
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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
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US397653A
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English (en)
Inventor
Rudolf Otte
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Limon Fluhme GmbH
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De Limon Fluhme GmbH
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Filing date
Publication date
Priority claimed from DE19722245240 external-priority patent/DE2245240C3/de
Application filed by De Limon Fluhme GmbH filed Critical De Limon Fluhme GmbH
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Publication of US3915259A publication Critical patent/US3915259A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16N—LUBRICATING
    • F16N25/00—Distributing equipment with or without proportioning devices

Definitions

  • ABSTRACT A control system for the reversal of a two-line central lubricating system which includes a first and preferably also a second distributor, a limit switch arranged at the end of the feeding lines, and a control piston which is moved in conformity with the differential pressure between the feeding lines and in conformity with the position of a servo piston interposed between the feeding lines.
  • the control piston is formed by the delivery piston of one of the distributors while the outlets of this one distributor are through the intervention of overflow valves respectively connected to the respective feeding line not under pressure above atmospheric pressure.
  • the present invention concerns a control device for controlling a two-conduit central lubricating installation which comprises two distributors and is equipped with a limit switch which is arranged at the end of the feeding conduits and brings about the reversal of the control devices. More specifically, the present invention relates to a control device as set forth above which is equipped with'a control piston which is operable to actuate the limit switch, and the movement of which is effected in conformity with the differential pressure between the feeding lines, and in conformity with the position of a servo-piston arranged between the feeding lines.
  • Control devices of this type for reversing a twoconduit central lubricating installation are known, while the reversal or control is effected in the two feeding lines by any desired reversing devices.
  • the lubricant distributors arranged in the installation are hydraulically driven by a change in pressure in the two feeding lines whereby, at the same time, a certain definite quantity of'lubricant is conveyed to the area to be lubricated. 7
  • the limit switch is actuated by a control piston which is on both sides spring-loaded.
  • a control piston which is on both sides spring-loaded.
  • special electrical steps are necessary in order to store the last carried-out contact, because the control piston is on both sides spring-loaded and therefore returns to its intermediate position in which the limit switch is open.
  • a time delay occurs which is dependent on the pump delivery, it is necessary on the other hand to select the force of the springs acting upon the control piston, relatively high in order to realize the contact necessary for the reversal and to obtain this contact only after the lubrication has been completed.
  • an object of the present invention to provide a control device of the above-mentioned general type which will have an energy-saving and function-reliable operation regardless of the pressure behavior inherent to the installation.
  • FIG. 1 diagrammatically illustrates a side view of the control device according to the invention.
  • FIG. 2 represents a cross-section taken along the line 11-11 of FIG. 1.
  • FIG. 3 illustrates a cross-section taken along the line III-III of FIG. 1, and more specifically illustrates the distributor of the control device.
  • the control device for controlling or reversing a twoline 'central lubricating installation which comprises a plurality of distributors and is provided with a limit switch located at the end of the feeding lines and bringing about the reversal of the device, and which is equipped with a control piston operable to actuate the limit switch and movable in conformity with the differential pressure between the feeding lines and also in ing the control piston in the control device, which aging would harmfully affect the operation of the control device, it is suggested, according to the present invention, in the control device additionally to provide at least one conveying piston associated with a point of lubrication so that the lubricant also in the control device be continuously changed.
  • control device generally illustrated in FIG. 1 is arranged at the end of the two feeding lines 1 and 2 pertaining to the central lubricating installation.
  • the two feeding lines 1 and 2 respectively leading to a longitudinal bore 3a, 3b, of adistributor housing 3.
  • the control device proper is located in the plane IIII and as far as its construction is concerned can best be seen in FIG. 2, whereas the cross-section along the section line III-III illustrates the construction of an ordinary distributor.
  • the distributor according to FIG. 3 which in addition to the control device is arranged within the valve hous- .ing 3 has a servo-piston 7, the cylinder bore of which extends between the two longitudinal bores 3a and 3b.
  • the bore for the servo-piston 7 communicates through overflow passages 3c and 3d with a further bore in .which the conveying piston 8 is located.
  • FIG. 3 shows a plurality of stoppers 3g which, for purposes of facilitating the manufacture, close the conduits or passages of the distributor housing 3 at the non-required exits.
  • the distributor described above operates in the following manner: When, as illustrated in FIG. 3, the feeding line which communicates with the longitudinal bore 3a is under pressure, the lubricant present in this feeding line 1 presses the servo-piston 7 back to such an extent that the lubricant can, through the overflow passage 3c, pass into the cylinder bore of the conveying piston 8.
  • the lubricant thus also brings about the displacement of the conveying piston 8 to the end position illustrated in FIG. 3, while the lubricant between the end face of the conveying piston 8 and the stopper 33 passes through the overflow passage 3d into the bore of the servo-piston 7. From this bore, the lubricant passes to the outlet bore 3f and thereby into the lower lubricant conduit 9.
  • the lubricant column in the lubricant conduit 9 is thus displaced in the direction toward the point of lubrication, which later is supplied with a quantity of lubricant that corresponds to the succeeding quantity of lubricant.
  • the control device according to FIG. 2 which, as far as its fundamental construction is concerned, corresponds to the above-described distributor houses the conveying piston 8 of the distributor as control piston 8a. Also, this control piston 8a is provided with a connecting rod 10a which cooperates with an abutment screw 12a. This abutment screw 12a is screwed into a sleeve 13, which is displaceable within an adjusting housing 4. This adjusting housing 4, which is placed upon the distributing housing 3, also carries a limit switch 6 by means of a supporting arm 5. This limit switch 6, which establishes the contact for reversing the two-conduit central lubricating installation, is provided with a contact push rod 6a that is actuated by a control rod 14. This control rod 14 is connected to the sleeve 13 and is guided within a guiding sleeve 15, .which latter is screwed into the adjusting housing 4 and at the same time connects the supporting arm 5 to the housing 4.
  • the outlets 3e and 3f of the control device are respectively provided with an overflow valve 16 and 17.
  • Each overflow valve 16, 17, is respectively, through a short circuit line l8, 19, in communication with the other feeding linei.e., the one which is pressureless.
  • the control piston 8a has now to carry out its complete stroke before the contact push rod 6a is actuated.
  • FIG. 2 shows that within the setting housing 4 there is provided an arresting ball 20, which cooperates with two notches in the sleeve 13.
  • the sleeve 13, which is connected to the connecting rod 14 is at the end of the respective stroke of the control piston 8a arrested in one of the two arresting positions, so that the establishment of contact by the limit switch 6 is effected at the end of the respective piston stroke, and thus obtained control position will be maintained up to the end of the succeeding piston stroke.
  • the control device has the advantage that the control operation is no longer dependent from the obtainment of of a pre-determined spring force, but is dependent merely from the pressure differential which is required for the function of the entire lubricating installation.
  • the said pressure differential is measured at the most critical point, for instance, at the last mentioned lubricating point.
  • control piston for the control device the conveying piston of a distributor is employed, the establishment of contact for the reversal is, with regard to pressure as well as with regard to time, selected in conformity with the working operation of the distributor, so that the control device has the same characteristics as the distributor of the central lubricating installation.
  • a reversible lubricant feeding pump two lubricant conveying lines connected with the respective pressure and suction side of said pump; housing means; distributor means arranged in said housing means; said distributor means including a cylinder, a fluid operable piston reciprocable in said cylinder, first and second outlet means provided in said housing means for alternately conveying lubricant displaced by said piston to areas to be lubricated, servo cylinder-piston means communicating with the respective pressure line of said two lubricant conveying lines and controlling fluid communication between said cylinder and alternately one and the other of said outlet means to convey lubricant under pressure alternately to one and the other side of said piston and to discharge lubricant displaced by said piston alternately to one and the other of said outlet means; limit switch means operatively connected to said pump for reversing the same; and connecting rod means operatively connected to said piston and operable to control said limit switch means and thereby controlling the reversal of said pump.
  • two lubricant conveying lines connected with the respective pressure and suction side of said pump; housing means; first and second distributor means arranged in said housing means; said first distribtuor means including a first cylinder, a first fluid operable piston reciprocable in said first cylinder, first and second outlet means provided in said housing means for alternately conveying lubricant displaced by said first fluid operable piston to areas to be lubricated, and first servo cylinder-piston means communicating with the respective pressure line of said two lubricant conveying lines and controlling fluid communication between said first cylinder and alternately one and the other of said outlet means to convey lubricant under pressure alternately to one and the other end of said first piston and to discharge lubricant displaced by said first piston to an area to be lubricated; said second distributor means including a second cylinder, a second fluid operable piston reciprocable under differential pressure in said second cylinder, flrst and second overflow valve means provided

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
  • Reciprocating Pumps (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
US397653A 1972-09-15 1973-09-17 Control system for reversing a two-line central lubricating system Expired - Lifetime US3915259A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722245240 DE2245240C3 (de) 1972-09-15 Als Schaltgerät lür die Umsteuerung einer Zweileitungs-Zentralschmieranlage dienender Verteiler

Publications (1)

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US3915259A true US3915259A (en) 1975-10-28

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Application Number Title Priority Date Filing Date
US397653A Expired - Lifetime US3915259A (en) 1972-09-15 1973-09-17 Control system for reversing a two-line central lubricating system

Country Status (4)

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US (1) US3915259A (show.php)
FR (1) FR2199846A5 (show.php)
GB (1) GB1420654A (show.php)
PL (1) PL84391B1 (show.php)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390083A (en) * 1980-04-16 1983-06-28 De Limon Fluhme Gmbh & Co. Double-conduit central lubricating system
US5199528A (en) * 1991-12-05 1993-04-06 Atlas Copco Aktiebolag Flow controller
US20170074323A1 (en) * 2014-03-31 2017-03-16 Skf Lubrication Systems Germany Gmbh Roller bearing cage and method for mounting a roller bearing cage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2973058A (en) * 1959-03-26 1961-02-28 Georges Martin Ets Metering distributors of two-line central lubrication systems
US3024869A (en) * 1957-11-19 1962-03-13 Shibnura Kyodo Kogyo Kabushiki Lubricant supply device
US3223198A (en) * 1963-04-17 1965-12-14 Eaton Mfg Co Fluid pressure lubricating system indicator means
US3286793A (en) * 1963-03-19 1966-11-22 Applic Mach Motrices Automatic reversing and metering device for central lubrication systems
US3590956A (en) * 1969-04-09 1971-07-06 Houdaille Industries Inc Crossover valve for lubricant distributor
US3653466A (en) * 1969-10-15 1972-04-04 Daikin Ind Ltd Lubricant valve assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3024869A (en) * 1957-11-19 1962-03-13 Shibnura Kyodo Kogyo Kabushiki Lubricant supply device
US2973058A (en) * 1959-03-26 1961-02-28 Georges Martin Ets Metering distributors of two-line central lubrication systems
US3286793A (en) * 1963-03-19 1966-11-22 Applic Mach Motrices Automatic reversing and metering device for central lubrication systems
US3223198A (en) * 1963-04-17 1965-12-14 Eaton Mfg Co Fluid pressure lubricating system indicator means
US3590956A (en) * 1969-04-09 1971-07-06 Houdaille Industries Inc Crossover valve for lubricant distributor
US3653466A (en) * 1969-10-15 1972-04-04 Daikin Ind Ltd Lubricant valve assembly

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4390083A (en) * 1980-04-16 1983-06-28 De Limon Fluhme Gmbh & Co. Double-conduit central lubricating system
US5199528A (en) * 1991-12-05 1993-04-06 Atlas Copco Aktiebolag Flow controller
US20170074323A1 (en) * 2014-03-31 2017-03-16 Skf Lubrication Systems Germany Gmbh Roller bearing cage and method for mounting a roller bearing cage
US11149792B2 (en) * 2014-03-31 2021-10-19 Skf Lubrication Systems Germany Gmbh Lubricant injector
US20210404517A1 (en) * 2014-03-31 2021-12-30 Skf Lubrication Systems Germany Gmbh Lubricant Injector
US11859668B2 (en) * 2014-03-31 2024-01-02 Skf Lubrication Systems Germany Gmbh Lubricant injector

Also Published As

Publication number Publication date
PL84391B1 (show.php) 1976-03-31
GB1420654A (en) 1976-01-07
FR2199846A5 (show.php) 1974-04-12
DE2245240B2 (de) 1976-09-09
DE2245240A1 (de) 1974-03-21

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