DE1600333A1 - Pneumatic relubrication device for flow machines - Google Patents

Description

(S 26i) s C? Λ »O i

3.296? Egg / pf

Pneumatic Haehsehmiereinriehtung; add Turbo machines

The invention relates to a device for the automatic Srsatzsehmierung a ³ high-speed end fluid flow machine bsi failure of the normal Druekschmierraittelpusipe _o

For example, machines with special bearings, Especially when there is a fast running flow baselines often the need ^ that failure of the existing lubrication device for normal operation an emergency = bz? Jo llachsohmieinrichtung the oil supply ü

Is now the normal © Schraieinrichtung ^ 2 _O B _O iieehasiisoh sait & qt Iö? Aft = bzttr _o ArbsitseascMn ©

then the risk is often an abrupt failure of the oil production is not so much great · usually is installed a second oil pump in such machines whose drive ausfalisichere to a possible, or, storable energy source, _e B. emergency power, is connected steam turbine *

If the oil pump of the main shredder device is driven by an electric motor, then the oil delivery stops suddenly, for example in the event of a power failure. In this case, too, a second oil pump, electrically or steam-driven, can take over lubrication, although it is advantageous if connected to the Sohmierleituns; S ₀ B ₃ sia Hyörmilikspeicner ₃ is connected while the üer Anls'afsolfc sweitsn the pump, the oil gsspeieherte m dsn Scliiaie ^ stellsn are ₀ Especially in the case of a sudden failure d © ^ ölfSrdsrimg is one without transition onset emergency BAW ₃ fIaehseliEierui s ^ © rfordsrliclij since in many cases at this moment the force bs> 7 _{o work} cycle is fully loaded «

It is also common for ansfcslle a second oil pump only 3inen Hydraulikspeieher to install · Gebräuchlichs Spsioherausführungen are Druckbshälter ^ which under a biased gas stand © n ₃ wofesi dsr Gasraiini from ölrausi 2J3 _a separated by one membrane _a Güev cylinder fsdertew, S35? Maybe bela did Kolfosn ods ^ aiiöh Holders,

o / s

LINDE AKTIENGESELLSCHAFT

Is only used as a hydraulic accumulator for a relubrication device used, then the turbo machine must immediately Failure of the main line equipment can be turned off because the commercial storage, the usable volume is usually only sufficient for a short run-down time of the machine. In certain circumstances it is necessary to connect several storage units in parallel to one battery, which is then relatively expensive. Ooh that Using an elevated tank can lead to difficulties with accommodation, depending on the required lubricating oil pressure to lead.

The invention is based on the task of eliminating the disadvantages of using a high container or the expense or «to avoid the sometimes too small usable volume when using commercially available hydraulic accumulators and a transition lot To ensure automatic replacement lubrication.

According to the invention, this object is achieved in that when the lubricant pressure drops below a predetermined one Limit a medium under sufficient pressure for lubrication by means of appropriate control fittings specifically lighter than the lubricant and not with it is essentially miscible in the top of a fully filled Lubricant pressure container is introduced, which under the sustained pressure of this medium its full lubricant content in the main lubricant supply line to the turbo-machine empties a float

009823/0406

LINDE AKTIENGESELLSCHAFT

valve shuts off the lubricant outlet line.

The useful volume of the relubrication reservoir can vary

be trained according to requirements

With compressed air you have a drive energy that has good storage behavior and can be obtained with less effort can be used as a fail-safe emergency power grid or a steam power supply.

It is also possible to use a compressed air cylinder as an energy store

Under certain circumstances, instead of compressed air from the plant network, the drive medium or delivery medium of the flow machine can also be used can even be used for the relubrication device

In an advantageous embodiment of the invention serves as a control valve for introducing the pressure medium into the Upper part of the lubricant pressure tank is a spring-loaded control slide that counteracts the effect of the lubricant pressure when it falls, a spring shifts it in such a way that a connection between a pressure medium connection is established its housing and a line to the upper part of the lubricant pressure tank is made.

When oil is pumped for emergency or relubrication using a compressible medium such as compressed air, there is a risk that, if the main lubrication device suddenly fails, the pneumatic lubrication device will not deliver oil for a short time, because

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LINDE AKTIENGESELLSCHAFT

pressibility of the drive means initially for a certain period of time can elapse until the required pressure has built up.

In order to eliminate this danger, too, another Feature of the invention, the device designed in such a way that in the line from the control slide to the upper part of the An automatic switching valve switched on is that by means of a freely movable membrane between two opposite connections either the way from the control spool connected on the one hand to a laterally connected nozzle to the upper part of the Schraiermitteldi \ rck- ' container or the way from the upper part of the lubricant pressure container via the laterally connected nozzle to the other connected nozzle to a main lubricant reservoir vented at the top via a throttle valve.

An essential idea of the invention is that a switching element is used as the automatically acting switchover valve which, on the one hand, blocks the outlet opening to a return flow line when there is no oil pressure from the main lubrication device and there is control air pressure, the connection "control air relubrication tank" being open and S welelies on the other hand with existing ones! Oil pressure from the Eauptschsaierein ^ ichtung ago and completely filled with oil NaehSGhBHerbsbalter the Eintrlttsöffniang the Sfceuerluft shuts off. * Wove ©! ' then oil © "Nachsohmlerbahält-Rtleklaufleitung" opened 1st ο

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LINDE AKTIENGESELLSCHAFT

It is important for the proper functioning of the automatic Switching valve made use of the large difference in viscosity between oil and air. As long as air from the top of the lubricant pressure tank flows back through the side connection of the automatic switchover valve is not noticeable There is a throttling effect, since the freely moving membrane is hardly lifted by air, so that it is essentially after can flow off at the top via the control slide for venting. Only at the moment when oil flows back from the upper part of the lubricant pressure tank does the switching element become more automatic Switching valve due to the suddenly occurring greater flow resistance of the freely moving diaphragm seal the upper connection, whereupon the oil flowing back only through the throttle can flow off into the main lubrication tank The relubrication system is under oil pressure, so that the changeover element of the automatic changeover valve is now clearly through this pressure seals the upper connection.

According to this, it is therefore essential that the from the top of the lubricant pressure tank in the side port of the The air entering the main lubricant reservoir is vented upwards via the control slide via the automatic switching valve without pressure building up due to throttling, while lubricant entering through the same line the free moving membrane immediately lifts, wodureii lubricant

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with simultaneous pressure build-up only via the throttle in flows back through the main lubricant reservoir

The one built into the return line of the lubricant The throttle has the advantage that an oil pressure builds up in the entire relubrication system, which is approximately the size of the normal lubricating oil pressure. In addition, a small amount of oil always flows through the from bottom to top during normal operation Re-scrubbing tank via switching valve and return line back via the throttle valve into the oil tank Any air bubbles contained in the oil are reclaimed into the oil tank with the return oil UiU can degas there

Finally, it is also conceivable that the relubrication device is only controlled by an automatically operating switchover valve. In this case, a pressure medium must always be supplied before the the switching valve designed as a float valve. the pressure of the available medium «If the main lubrication device fails, there is also no transition the pressure medium oil is conveyed to the lubrication points.

After that, a control valve is used to introduce the pressure medium into the upper part of the lubricant pressure tank Float valve, the float housing of which is connected to the upper part of the lubricant pressure tank and each one

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with the float connected lower and upper valve cone, with either the lower valve cone each one Lubricant return line to the main lubricant reservoir via a throttle or the upper valve cone each one The pressure medium supply line is shut off with a pressure relief valve and the upper valve cone when the lubricant pressure drops can be opened by the pressure of the pressure medium in the pressure medium supply line.

In this case there would be an appropriately adjusted pressure relief valve to be provided with a connection to the vent line in the pressure medium feed line through the one in the lubricant pressure tank Any air is pushed out when the normal oil pump starts up again and the lubricant pressure tank full again from below.

Institutions of what is known per se from pneumatics, there but in another mode of operation as a quick exhaust valve used automatic switching valve could also be used in conjunction a float valve can be used with a control slide, which is connected to the float lower and has upper valve cone. Takes place if the main lubrication device fails an emergency or relubrication caused by compressed air, then the lower valve cone of the float valve closes the outlet of the return line and compressed air can only reach the relubrication reservoir. In the reverse

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Trap when the relubrication reservoir is completely filled with oil, When the float housing is filled with oil, the upper valve cone of the float will shut off the supply bore for the compressed air, and the return flow is via the throttle and return line promoted into the oil tank.

A float valve can then be installed in the line from the control slide to the upper part of the lubricant pressure tank be switched on, the float housing is connected to the upper part of the lubricant pressure tank and each one has lower and upper valve cone connected to the float, with either the lower valve cone each dropping the lubricant pressure and the use of replacement lubrication, a lubricant return line to the main lubricant reservoir is shut off via a throttle or the upper valve cone the connection with increasing lubricant filling of the float housing and normal lubricant pressure locked to the control valve

It is provided in all cases that during normal operation the lubricant pressure tank via its float valve from below from the lubricant pressure line from the normal Automatic pressure lubricant pump with lubricant until it overflows through the automatic switching valve and the Throttle valve is charged "

In the Sohraiermittelrücklaufleitung is also inventive

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According to a sight glass installed behind the throttle point, which shows whether oil or air or a mixture of oil and air flows back. During normal operation or emergency lubrication readiness (filled lubricant pressure tank) only oil would have to flow through · The lubricant pressure tank is located when air with a possible oil content flows through in a replenishment process

Finally, it is also provided that in the lubricant pressure line leading to the lubrication points a on the Lubricant pressure responsive switch is built in, which the flow machine when falling below a minimal required lubricant pressure switches off. The switch-off pulse can be forwarded with a delay time measured in such a way that the operational The selected volume of the lubricant pressure tank is sufficient to provide lubrication for the duration of the requirements emergency lubrication time drawn in bed wire including run-out time to take over the turbo engine.

An example embodiment of the device according to the invention is to be described in more detail with the aid of the accompanying drawing will be.

From the main oil tank 1, a normal pressure oil pump 2, electrically driven, conveys oil via the line 5 to the Lubrication points 4 of the flow machine. The return takes place

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- 11 -

then via a pressure holding valve 5 and line 6 to the oil tank. The pressure oil line J5 now has a check valve 3a in front of it a branch line 7 which transmits the oil pressure into the housing 8 of a control slide 9. The control slide 9 is durdi the spring IO cushioned «The valve spool housing 8 has a Compressed air connection 11 with pressure reducer 11a, as well as a connection piece 12 for an automatic switching valve I3. Furthermore, an additional line IJa to the vent port of the Main oil tank 1 · Has the automatic changeover valve I3 a freely movable membrane 14 between an upper inlet connection 15 and a lower outlet connection l6; also a Lateral connection line I7 to the upper part of a lubricant pressure tank 18, some of which can be flanged to the main oil tank

The connector 16 of the automatic switchover valve is connected to an overflow line I9, which via a throttle 20 and a sight glass 21 leads back to the main oil tank 1.

Finally, there is also an oil supply line 22 on the Pressure oil line 3 connected, which leads to a float valve in the lower part of the lubricant pressure tank l8. Furthermore, a pressure switch 24 should be mentioned, the is connected to the main oil line 3 and is used to switch off the turbomachine when the oil pressure is a certain Falls below the minimum value.

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If the oil pressure falls due to failure of oil pump 2 in Line 7 falls below a certain value, the control slide 9 is moved to the left by the spring 10 (like drawn), sd that a connection between the compressed air line 11 created via the connecting piece 12 and line 17 to the upper part of the lubricant pressure tank 18 will. The oil in the lubricant pressure vessel 18 is then with the help of the compressed air through the float valve 23 and the Line 22 is pressed into the pressure oil line 3 until the float valve 23 largely closes the pressure oil tank Shuts off idling. The check valve 3 «ensures that the oil from the lubricant pressure tank does not flow back to the main oil pump 2 and the control shaft 9 does not can push back into its original position.

As soon as the oil pump comes back into normal operation, the pressure in line 7 increases, so that the control slide 9 is moved to the right. As a result, the nozzle 12 is with the vent line 13a connected and the compressed air line 11 locked. In addition, pressure oil is simultaneously pressed into the lubricant pressure vessel from below through line 22, the air from the upper part of the lubricant pressure tank 18 via the line 17 and nozzle 12 as well Line 13a is fed to the vent. As soon as oil like that has risen high that the lubricant pressure tank

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is full of oil, the oil also rises into the self-

active switching valve IJ> . As a result, the membrane 14 is raised and the vent line is shut off. A quantity of oil resulting from the cross section of the throttle 20 then runs back via the line 19 into the main container. This automatically ensures full readiness of the relubrication device during normal operation without any special intervention ₀

11 claims
1 sheet of drawings

§IS23 / 0406

Claims (5)

J »LINDE AKTIENGESELLSCHAFT (S 261). Γρ \ Γ - --.-. S GV 'OO j. 2. 196? Claims 1. Device for automatic replacement lubrication of a high-speed one Fluid flow machine when the normal pressure lubricant pump fails, characterized in that when it drops the lubricant pressure below a specified limit by means of appropriate control fittings one below one for the lubrication Sufficient pressurized medium that is specifically lighter than the lubricant and not significantly with it is miscible, is introduced into the upper part of a fully filled lubricant pressure tank (18), which is below the sustained pressure of this medium transfers its full lubricant content into the main lubricant supply line (3) A float valve (23) delivers the lubricant outlet line to the flow machine until it has been largely emptied (22) shut off. 2. Device according to claim l _f, characterized in that compressed air is used as the pressure medium, 3 «device according to claim 1, characterized in that as the pressure medium, the drive or »conveying medium of the turbomachine serves, 008823/0406 LINDE AKTIENGESELLSCHAFT 4. Device according to one of claims 1 to 3 *, characterized in that that as a control valve for introducing the pressure medium into the upper part of the lubricant pressure tank a spring-loaded control slide (b, 9) is used to counteract the effect of the lubricant pressure when it drops is displaced by a spring (10) in such a way that a connection between a pressure medium connection (11) at its (12.17)
Housing and a line % &% & $ to the top of the lubricant pressure vessel is made. 5. Device according to claim 4, characterized in that an automatic switching valve (15) is switched on in the line (12, 17) from the control slide (8, 9) to the upper part of the lubricant pressure tank (Lö), which by means of a freely movable membrane ( Ik) between two opposite connections (15,16) either the path from the one hand connected control slide (b, 9) to a laterally connected line (17) to the upper part of the lubricant pressure container (l8) or the path from the upper part of the lubricant pressure container (18) via the laterally connected line (17) to the other side connected nozzle (l6) via line (19) to a main lubricant container (l) vented at the top via a throttle valve (20) releases. 009823/0406 Jfc LINDE AKTIENGESELLSCHAFT 6 · Device according to claim 5 * characterized in that from the upper part of the lubricant pressure tank (18) via line (17) into the side connection of the automatic switching valve Incoming air is vented upwards via the nozzle (12) and line (IJa) into the main lubricant reservoir (l) without a pressure building up due to throttling, while through the same line (17) entering Lubricant lifts the freely moving diaphragm (14) immediately, creating lubricant at the same time Pressure build-up only flows back into the main lubricant reservoir (1) via the throttle (20) 7 · Device according to one of claims 1 to J> _$ characterized in that a control valve for introducing the pressure medium into the upper part of the lubricant pressure container Float valve is used, the float chamber of the lubricant pressure vessel / is connected to the upper US) in part and that has a respective associated with the float lower and upper V _e ntilkegel, wherein either the lower valve cone into the main lubricant reservoir (l) via a lubricant return conduit (19) a throttle (20) or the upper valve cone each shuts off a pressure medium supply line (11) with a pressure relief valve and the upper valve cone can be opened when the lubricant pressure drops due to the pressure of the pressure medium in the pressure medium supply line (11). 009823 / CU06 LINDE AKTIENGESELLSCHAFT ο Device according to claim 4 * characterized in that a float valve is switched on in the line (12, 17) from the control slide (8, 9) ^{to the} upper part of the lubricant pressure tank (18), the float valve of which is connected to the upper part of the lubricant pressure tank (18) and which has one lower and one upper valve cone each connected to the float, whereby either the lower valve cone has a lubricant return line when the pressure of the lubricant drops and when replacement lubrication begins (19) to the main lubricant reservoir (1) via a throttle (20) shuts off or the upper valve cone each time it rises? Float filling of the float housing and normal Lubricant pressure the connection (12) to the control « (8 ,, 9) blocked ,, 9a device according to one or more of claims 1 to 7, characterized ^ that the lubricant pressure vessel (l8) üfoerssin float valve (23) "- / on below from the lubricant pressure line (3) from the normal pressure lubricant pump (2) automatically with lubricant until it overflows Charged via the automatic switching valve (13) and the throttle valve (20) ο Einriehfcimg according to one or more of claims 1 to B _s characterized ^ that a sight glass (22) for observing äe.3 overflow is built _{into the lubricant overflow flow C19) after the throttle valve (20) o} On (5 fl ^ i) i Fi I (\ ( 3.U ueid / U4 U © LINDE AKTIENGESELLSCHAFT lie device according to one or more of claims 1 to 9 * characterized in that in the lubricant pressure line (3) there is a switch responsive to the lubricant pressure (24) is installed which, if the minimum required lubricant pressure is not reached, a switching process of this type triggers that the turbomachine is only kept in operation as long as it was when the system was designed selected usable volume of the Sehmiermifcteldrucks container (lö) permits operation of the machine including the run-down time ο OCIgg23 / iHuS