DK154016B - HYDRAULIC PLANT FOR TRANSPORT Means - Google Patents
HYDRAULIC PLANT FOR TRANSPORT Means Download PDFInfo
- Publication number
- DK154016B DK154016B DK080085A DK80085A DK154016B DK 154016 B DK154016 B DK 154016B DK 080085 A DK080085 A DK 080085A DK 80085 A DK80085 A DK 80085A DK 154016 B DK154016 B DK 154016B
- Authority
- DK
- Denmark
- Prior art keywords
- hydraulic
- valve
- priority valve
- connection
- line
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
- B62D5/09—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by means for actuating valves
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Steering Mechanism (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
Description
DK 154016BDK 154016B
Opfindelsen vedrører et hydraulikanlæg til transportmidler, hvilket anlæg omfatter en hydraulisk styremekanisme, der er hydraulisk forbundet med en hydraulisk cylinder og et hydraulisk reservoir, samt en hydraulisk 5 styret prioritetsventil, der er en to-stillings hydraulisk styreventil med proportional virkning, hvilken prioritetsventils første og anden ledningstilslutning er forbundet med hinanden i prioritetsventilens ene stilling og hvis første, anden og tredie ledningstilslutning 10 er forbundet med hinanden i prioritetsventilens anden stilling, og hvor prioritetsventilens første lednings-tilslutning er forbundet med udløbet af en pumpe, hvis indløb er forbundet med det hydrauliske reservoir, prioritetsventilens anden ledningstilslutning er forbundet 15 med den hydrauliske styremekanisme gennem en hydraulisk trykledning og prioritetsventilens tredie ledningstilslutning er forbundet med yderligere arbejdsudstyr, medens prioritetsventilens styrekamre er hydraulisk forbundet med den hydrauliske styremekanisme.The invention relates to a hydraulic system for conveying means, which comprises a hydraulic control mechanism hydraulically connected to a hydraulic cylinder and a hydraulic reservoir, as well as a hydraulically controlled priority valve, a two-position hydraulic control valve having proportional effect, second conduit connection is connected to each other in the one position of the priority valve and the first, second and third conduit connection 10 are connected to each other in the second position of the priority valve, and wherein the first conduit connection of the priority valve is connected to the outlet of a pump whose inlet is connected to the hydraulic reservoir, the second valve connection of the priority valve is connected to the hydraulic control mechanism through a hydraulic pressure line, and the third line connection of the priority valve is connected to additional work equipment, while the control chamber of the priority valve is hydraulically connected to it. hydraulic control mechanism.
20 Et hydraulikanlæg til transportmidler er beskre vet i DE-offentliggørelsesskrift nr. 2.934.221, hvilket anlæg omfatter en styremekanismes og en driv- eller ar-bejdsmekanismes hydraulikanlæg. Styreanlægget omfatter en hydraulisk cylinder forbundet med styrede elementer 25 af transportmidlet og en hydraulisk styremekanisme. Den hydrauliske styremekanisme omfatter en hydraulisk styreventil med tre stillinger og fem ledningstilslutninger, og som er mekanisk ledforbundet med et rat og med en tilbagekoblingshydraulikmotor. Denne hydrauliske styre-30 ventil er hydraulisk forbundet med den hydrauliske cylinder ved hjælp af hydrauliske arbejdsledninger, og med et hydraulisk reservoir ved hjælp af en returledning, samt med en hydraulisk styret prioritetsventil, der er en to-stillings hydraulisk styreventil med tre lednings-35 tilslutninger, ved hjælp af en trykledning. I den neutrale stilling af den hydrauliske styremekanismes hy- 220 A hydraulic system for means of transport is described in DE Publication No. 2,934,221, which system comprises a hydraulic system of a steering mechanism and a drive or working mechanism. The steering system comprises a hydraulic cylinder connected to guided elements 25 of the means of transport and a hydraulic steering mechanism. The hydraulic control mechanism comprises a three-position hydraulic control valve and five wiring connections, which are mechanically articulated with a steering wheel and a feedback hydraulic motor. This hydraulic control valve is hydraulically connected to the hydraulic cylinder by means of hydraulic work lines, and to a hydraulic reservoir by means of a return line, as well as by a hydraulically controlled priority valve which is a two-position three-line hydraulic control valve. connections, using a pressure line. In the neutral position of the hydraulic steering mechanism hy 2
DK 154016BDK 154016B
drauliske styreventil er dennes første ledningstilslutning, som står i forbindelse med trykledningen, og også den tredje og den fjerde ledningstiIslutning, som står i forbindelse med arbejdsledningerne, lukket, hvorhos den 5 anden ledningstilslutning, som står i forbindelse med den femte ledningstilslutning, er hydraulisk forbundet med returledningen.draulic control valve is closed its first conduit connection to the pressure conduit and also the third and fourth conduit connection to the conduits closed, whereby the second 5 conduit connection associated with the fifth conduit connection is hydraulically connected with the return line.
I yderstillingerne af den hydrauliske styremekanismes hydrauliske styreventil er dennes første led-10 ningstilslutning koblet sammen med den anden ledningstilslutning gennem en drøvleåbning dannet mellem kanterne af styreventilens glider og styreventilens krop, og med den tredje eller fjerde ledningstilslutning (afhængigt af den valgte retning af gliderens forskydning), 15 den modsatte ledningstilslutning (den fjerde eller den tredje) er forbundet med den femte ledningstilslutning.In the outer positions of the hydraulic control mechanism of the hydraulic control valve, its first conduit connection is coupled to the second conduit connection through a throttle opening formed between the edges of the control valve slider and the control valve body, and with the third or fourth conduit connection (depending on the direction of the slider displacement). ), The opposite wire connection (the fourth or the third) is connected to the fifth wire connection.
Den første ledningstiIslutning i prioritetsventilen, der har en fjederbelastet glider, er forbundet med udløbet af en hydraulisk pumpe, hvis indløb er hydrau-20 lisk forbundet med det hydrauliske reservoir, den anden ledningstilslutning er hydraulisk forbundet med trykledningen, og den tredje ledningstiIslutning er hydraulisk forbundet med indløbet for transportmidlets hydrauliske arbejdsudstyr Prioritetsventilen har i samme ende som 25 gliderens fjeder et styrekammer, der er hydraulisk forbundet med den hydrauliske styremekanismes anden ledningstilslutning.The first line connection in the priority valve having a spring-loaded slide is connected to the outlet of a hydraulic pump whose inlet is hydraulically connected to the hydraulic reservoir, the second line connection is hydraulically connected to the pressure line and the third line connection is hydraulically connected. with the inlet of the hydraulic working equipment of the means of transport The priority valve has, at the same end as the spring of the slider, a control chamber which is hydraulically connected to the second wiring of the hydraulic control mechanism.
Et andet styrekammer i prioritetsventilen er placeret i ventilens modsatte ende og er forbundet med 30 trykledningen.Another control chamber in the priority valve is located at the opposite end of the valve and is connected to the pressure line.
I prioritetsventilens ene stilling er ventilens første ledningstilslutning forbundet med en hydraulisk pumpe, som står i hydraulisk forbindelse med den anden ledningstiIslutning, der er forbundet med trykledningen, 35 hvorimod ventilens første ledningstiIslutning i ventilens anden stilling er forbundet med den anden og den 3In the one position of the priority valve, the first conduit connection of the valve is connected to a hydraulic pump which is in hydraulic communication with the second conduit connection connected to the pressure conduit, whereas the first conduction connection of the valve in the second position of the valve is connected to the second and the other.
DK 154016 BDK 154016 B
tredje ledningstilslutning, hvilken sidstnævnte ledningstilslutning er forbundet med indløbet arbejdsudstyrets hydrauliske anlæg.a third conduit connection, said latter conduit connection being connected to the inlet hydraulic system of the work equipment.
Med rattet i den stationære position tilføres ar-5 bejdsfluidum fra den hydrauliske pumpe til prioritetsventilen og strømmer til det styrekaminer, der er placeret i enden modsat fjederen. Da den anden ledningstilslutning i styremekanismes styreventil er lukket i styreventilens neutralstilling, stiger trykket af arbejds-10 fluidummet i trykledningen, hvorved prioritetsventilens glider forskydes til en position, hvor den hydrauliske pumpe står i forbindelse med indløbet for arbejdsudstyrets hydrauliske anlæg.With the steering wheel in the stationary position, working fluid is supplied from the hydraulic pump to the priority valve and flows to the control stove located at the end opposite the spring. Since the second conduit connection in the control valve of the control mechanism is closed in the neutral position of the control valve, the pressure of the working fluid in the pressure line increases, whereby the slider of the priority valve is moved to a position where the hydraulic pump communicates with the inlet of the working equipment hydraulic system.
Drejning af rattet får den hydrauliske styremeka-15 nismes styreventils glider til at forskyde sig til en af sine yderstillinger. Når dette sker, forbinder drøvle-åbningen trykledningen med en egnet arbejdsledning og med styrekammeret i prioritetsventilens fjederende. Som følge af dette bevæger den hydrauliske styremekanismes 20 styreventils glider sig til en position, hvor den hydrauliske pumpes forbindelse med indløbet til arbejdsudstyrets hydrauliske anlæg afbrydes, og den sættes i forbindelse med den hydrauliske pumpes trykledning, følgende glideren i den hydrauliske styremekanismes styre-25 ventil. Den nødvendige mængde arbejdsfluidum begynder at strømme til styreanlægget. Med prioritetventilens glider i en yderstilling tvinger pumpen hele strømmen af arbe jdsf luidum ind i styreanlægget. Tilførslen til arbejdsudstyret er således stoppet.Turning the steering wheel causes the slider of the hydraulic control mechanism to slide to one of its outer positions. When this occurs, the throttle opening connects the pressure line to a suitable work line and to the control chamber at the spring valve spring end. As a result, the control valve of the hydraulic control mechanism 20 moves to a position where the hydraulic pump connection with the inlet to the hydraulic system of the work equipment is interrupted and it is connected to the hydraulic pump pressure line, following the slider in the control valve of the hydraulic control mechanism. . The required amount of working fluid begins to flow to the control system. With the priority valve slider in an outer position, the pump forces the entire flow of working fluid into the control system. Thus, the supply to the work equipment has stopped.
30 Det angivne hydraulikanlæg er ikke tilstrækkeligt pålideligt i drift, idet det udelukker muligheden for at styre transportmidlet i nødstilfælde, f.eks. når transportmidlets motor er gået i stå, dvs. når den hydrauliske pumpe, som drives af motoren, således ophører at 35 virke, eller når ledningen, som sætter den hydrauliske pumpe i forbindelse med prioritetsventilen bliver utæt.30 The specified hydraulic system is not sufficiently reliable in operation, since it excludes the possibility of controlling the means of transport in an emergency, e.g. when the vehicle's engine has stopped, ie. when the hydraulic pump driven by the engine ceases to operate or when the line connecting the hydraulic pump to the priority valve becomes leaky.
44
DK 154016 BDK 154016 B
Det kendte anlæg har en eller flere hydrauliske pumper med en betydelig samlet kapacitet, som er væsentlig for at sikre den nødvendige styrbarhed af transportmidlet, og anvendelsen af en prioritetsventil i hydrau-5 likanlægget bevirker en mere økonomisk udnyttelse af den installerede pumpeeffekt.The known plant has one or more hydraulic pumps with a considerable overall capacity, which is essential to ensure the necessary controllability of the means of transport, and the use of a priority valve in the hydraulic system makes more efficient use of the installed pump power.
Det er hensigten med opfindelsen at tilvejebringe et hydraulikanlæg til transportmidler, der medfører, at sikkerheden i brug øges, og at den installerede pumpeka-10 pacitet kan reduceres.It is an object of the invention to provide a hydraulic system for conveying means which increases the safety in use and the installed pumping capacity can be reduced.
Denne hensigt nås ifølge opfindelsen med et hydraulikanlæg af den i indledningen angivne art, der er ejendommeligt ved, at prioritetsventilen har en fjerde ledningstilslutning, som er forbundet med den første og 15 den anden ledningstilslutning i prioritetsventilens ene stilling og som er lukket i prioritetsventilens anden stilling, og at det omfatter en hydraulisk akkumulator med et opladningssystem for denne og med et tilløb, der er forbundet med prioritetsventilens fjerde ledningstii-20 slutning.This object is achieved according to the invention with a hydraulic system of the kind stated in the introduction, characterized in that the priority valve has a fourth conduit connection which is connected to the first and the second conduit connection in the one position of the priority valve and which is closed in the second position of the priority valve. and comprising a hydraulic accumulator with a charging system therefor and with an inlet connected to the fourth line terminal of the priority valve.
Det opnås herved, at der kan anvendes hydrauliske pumper, hvis samlede kapacitet er beydelig mindre end i det kendte anlæg, idet pumpekapaciteten kun bestemmes ud fra styremekanismens energibehov når transportmidlet kø-25 rer ligeud, medens den større energi, der kræves under svingning, leveres af akkumulatoren, hvis kapacitet f.eks. kan fastsættes ud fra et krav om, at transportmidlet skal kunne foretage et vist antal 90-graders sving.It is hereby achieved that hydraulic pumps whose overall capacity is considerably smaller than in the known plant can be used, the pumping capacity being determined only by the energy requirements of the control mechanism when the means of transport are running straight away, while the greater energy required during oscillation is supplied. of the accumulator, whose capacity e.g. can be determined based on a requirement that the means of transport must be able to make a certain number of 90 degree turns.
30 Forsøg har vist at den energi, der kræves til drift af styremekanismen ved anvendelse af hydraulikanlægget ifølge opfindelsen, er væsentlig mindre, fordi den hydrauliske akkumulator kun kobles ind når rattet drejes kraftigt, idet den eller de forholdsvis små hy~ 35 drauiikpumper kan tilføre den nødvendige energi under ligeudkørsel, som udgør den største andel af den samlede kørsel.Tests have shown that the energy required to operate the steering mechanism using the hydraulic system of the invention is substantially less because the hydraulic accumulator is only engaged when the steering wheel is rotated vigorously, as the relatively small hydraulic pump (s) can supply it. necessary energy during straight-ahead driving, which accounts for the largest share of total driving.
DK 154016 BDK 154016 B
55
Det er en yderligere fordel ved hydraulikanlægget ifølge opfindelsen, at sikkerheden af transportmidlets styresystem forøges væsentligt ved, at det giver mulighed for at styremekanismen kan forbindes med akkumulato-5 ren hvis pumpen svigter eller trykket i trykledningen falder på grund af lækage.It is a further advantage of the hydraulic system according to the invention that the safety of the means of transport of the means is greatly increased by allowing the control mechanism to be connected to the accumulator if the pump fails or the pressure in the pressure line drops due to leakage.
Opfindelsen vil blive forklaret ved hjælp af et eksempel på en udførelsesform og med henvisning til tegningen, der viser et diagram af et hydraulikanlæg ifølge 10 opfindelsen.The invention will be explained by way of an example of one embodiment and with reference to the drawing which shows a diagram of a hydraulic system according to the invention.
Det på tegningen viste hydraulikanlæg til et transportmiddel omfatter et hydraulisk styreanlæg og et hydraulisk anlæg 1 for et arbejdsudstyr. Hydraulikanlægget omfatter en hydraulisk cylinder 2 med en stem-15 pelstang 3 forbundet via et led med ikke viste styrede elementer i transportmidlet.The hydraulic system for a means of transport shown in the drawing comprises a hydraulic control system and a hydraulic system 1 for a working equipment. The hydraulic system comprises a hydraulic cylinder 2 with a piston rod 3 connected via a link with guided elements not shown in the means of transport.
Anlægget har en hydraulisk styremekanisme 4, der er sammenkoblet med et rat 5. Den hydrauliske styremekanisme 4 omfatter en hydraulisk styreventil 6 for-20 bundet med en tilbagekoblingsmekanisme 7.The system has a hydraulic control mechanism 4 which is coupled to a steering wheel 5. The hydraulic control mechanism 4 comprises a hydraulic control valve 6 connected to a feedback mechanism 7.
Tilbagekoblingsmekanismen 7 kan være udformet på en hvilken som helst egnet måde, f.eks. kan den bestå af et led, som forbinder transportmidlets styrede elementer med styreventilen 6, eller den kan være udført i 25 form af en tilbagekoblings-hydraulikmotor, placeret i hydraulikledninger, som forbinder styremekanismen 4 med cylinderen 2.The feedback mechanism 7 may be formed in any suitable manner, e.g. it may consist of a link connecting the controlled elements of the means of transport to the control valve 6, or it may be in the form of a feedback hydraulic motor located in hydraulic lines connecting the control mechanism 4 to the cylinder 2.
Styreventilen 6 har tre stillinger, og en første ledningstilslutning 8, en anden ledningstilslut-30 ning 9, en tredje ledningstilslutning 10, en fjerde ledningstilslutning 11, og en femte ledningstilslutning 12.The control valve 6 has three positions, and a first conduit connection 8, a second conduit connection 9, a third conduit connection 10, a fourth conduit connection 11, and a fifth conduit connection 12.
I det følgende anvendes for kortheds skyld betegnelsen "tilslutning" i stedet for "ledningstilslutning".In the following, for the sake of brevity, the term "connection" is used instead of "wire connection".
35 I styreventilen 6's neutrale stilling 13 er tilslutningerne 8, 10 og 11 lukket, hvorimod til slutningerne 9 og 12 er forbundet med hinanden.35 In the neutral position 13 of the control valve 6, the connections 8, 10 and 11 are closed, whereas the terminals 9 and 12 are connected to each other.
66
DK 154016BDK 154016B
I en af arbejdsstillingerne, f.eks. stillingen 14, står tilslutningen 8 i forbindelse med tilslutningerne 9 og 10 gennem en drøvleventil 15, hvorimod tilslutningen 11 står i forbindelse med tilslutningen 5 12.In one of the postures, e.g. position 14, connection 8 communicates with connections 9 and 10 through a throttle valve 15, whereas connection 11 communicates with connection 5 12.
I den anden arbejdsstilling 16 er tilslutningen 8 forbundet gennem drøvleventilen 15 med tilslutningerne 9 og 11, mens tilslutningen 10 står i forbindelse med tilslutningen 12.In the second working position 16, the connection 8 is connected through the throttle valve 15 to the connections 9 and 11, while the connection 10 is connected to the connection 12.
10 Styremekanismen 4 er hydraulisk forbundet med cylinderen 2 ved hjælp af hydrauliske arbejdsledninger 17 og 18, som er forbundet med styreventilen 6's tilslutninger, henholdsvis 10 og 11.10 The control mechanism 4 is hydraulically connected to the cylinder 2 by means of hydraulic work lines 17 and 18, which are connected to the connections of the control valve 6, 10 and 11 respectively.
Styremekanismen 4 er koblet til et hydraulisk 15 reservoir 20 ved hjælp af en retur ledning 19, som står i forbindelse med styreventilen 6*s tilslutning 12.The control mechanism 4 is coupled to a hydraulic reservoir 20 by means of a return line 19 which is connected to the control valve 6 * s connection 12.
Anlægget har også en prioritetsventil 21 med to stillinger, hvilken ventil har en glider 22 med en 20 fjeder 23, placeret mod den ene endeflade af glideren 22.The system also has a two-position priority valve 21, which valve has a slider 22 with a 20 spring 23, positioned against one end face of the slider 22.
Prioritetsventilen 21 har fire tilslutninger, hvoraf den første tilslutning 24 i en af ventilens stillinger 25 er forbundet med ventilens anden til-25 slutning 26 og dens tredje tilslutning 27, mens dens fjerde tilslutning 28 er lukket.The priority valve 21 has four connections, of which the first connection 24 in one of the positions of the valve 25 is connected to the second connection 25 of the valve and its third connection 27, while its fourth connection 28 is closed.
I prioritetsventilen 21's anden stilling 29 er tilslutningen 24 forbundet med tilslutningerne 26 og 28, mens tilslutningen 27 er lukket.In the second position 29 of the priority valve 21, the connection 24 is connected to the connections 26 and 28, while the connection 27 is closed.
30 Tilslutningen 24 forbinder prioritetsventilen 21 hydraulisk med udløbet 30 af en hydraulikpumpe 31, hvis indløb 32 står i hydraulisk forbindelse med reservoiret 20.The connection 24 hydraulically connects the priority valve 21 to the outlet 30 of a hydraulic pump 31, the inlet 32 of which is in hydraulic communication with the reservoir 20.
Prioritetsventilen 21’s tilslutning 26 er 35 forbundet med tilslutningen 8 i styremekanismen 4's styreventil 6 ved hjælp af en trykledning 33.The connection valve 26 of the priority valve 21 is connected to the connection 8 in the control valve 6 of the control mechanism 4 by means of a pressure line 33.
iin
DK 154016BDK 154016B
Prioritetsventilen 21's tilslutning 27 er gennem en hydraulisk ledning 34 koblet til arbejdsudstyrets hydrauliske anlæg 1, som har en sikkerhedsventil 35.The connection 27 of the priority valve 21 is connected through a hydraulic line 34 to the hydraulic system 1 of the work equipment, which has a safety valve 35.
5 Prioritetsventilen 21 har ved hver ende et sty rekammer 36 respektive 37.5 The priority valve 21 has at each end a control chamber 36 and 37 respectively.
En hydraulisk ledning 38 sætter det første styrekammer 36, som er placeret i samme ende som fjederen 23, i forbindelse med tilslutningen 9 i styreventilen 10 6.A hydraulic line 38 connects the first control chamber 36 located at the same end as the spring 23 to the connection 9 in the control valve 10 6.
En hydraulisk ledning 39 sætter det andet sty-rekammer 37, som er placeret i den ende, der er modsat den, hvor fjederen er placeret, i forbindelse med trykledningen 33.A hydraulic conduit 39 connects the second control chamber 37 located at the end opposite to where the spring is connected to the pressure conduit 33.
15 I hydraulikledningerne 38 og 39 er placeret dæmpere 40 respektive 41.At the hydraulic lines 38 and 39 are located dampers 40 and 41 respectively.
Anlægget omfatter desuden en hydraulisk akkumulator 42 med et anlæg 43 til at lade denne. Ladeanlægget 43 indeholder en hydraulikpumpe 44 med et indløb 20 45 forbundet med reservoiret 20 og et udløb 46 forbundet med akkumulatoren 42 gennem en hydraulikledning 47, en kontraventil 48 og en hydraulikledning 49.The plant further comprises a hydraulic accumulator 42 with a plant 43 for charging it. The charging system 43 contains a hydraulic pump 44 with an inlet 20 45 connected to the reservoir 20 and an outlet 46 connected to the accumulator 42 through a hydraulic line 47, a check valve 48 and a hydraulic line 49.
Hydraulikpumpen 44’s udløb 46 er også forbundet med reservoiret 20 gennem en styret ladeventil 50.The outlet 46 of the hydraulic pump 44 is also connected to the reservoir 20 through a controlled charging valve 50.
25 En ledning 51 til styring af ladeventilen 50 er forbundet med ledningen 49, og akkumulatoren 42 står i hydraulisk forbindelse med tilslutningen 28 i prioritetsventilen 21 ved hjælp af en hydraulikledning 52.A line 51 for controlling the charging valve 50 is connected to the line 49 and the accumulator 42 is hydraulically connected to the connection 28 in the priority valve 21 by means of a hydraulic line 52.
Hydraulikpumpen 44 er beskyttet mod overbelast-30 ning med en sikkerhedsventil 53, placeret mellem led- ningen 47 og en hydraulikledning 54.The hydraulic pump 44 is protected against overload by a safety valve 53 located between the conduit 47 and a hydraulic conduit 54.
Systemet har også en sikkerhedsventil 55, hvis indløb 56 er forbundet med ledningen 38, og et udløb 57, som er forbundet med returledningen 19.The system also has a safety valve 55 whose inlet 56 is connected to the conduit 38 and an outlet 57 which is connected to the return conduit 19.
35 Det beskrevne hydraulikanlæg virker som følger.35 The described hydraulic system works as follows.
I styreventilen 6's neutralstilling 13, suges arbejdsfluidum ind fra reservoiret 20 og ledes gennem 8In neutral 13 of control valve 6, working fluid is sucked in from reservoir 20 and passed through 8
DK 154016 BDK 154016 B
pumpen 31 til tilslutningen 24 i prioritetsventilen 21, hvis glider 22 er i stillingen 29 under påvirkning af fjederen 23. I denne stilling af prioritetsventilen 21 står hydraulikpumpen 31 i forbindelse 5 med trykledningen 33 gennem tilslutningen 26, og med akkumulatoren 42 gennem tilslutningen 28. På samme tid strømmer arbejdsfluidummet til styrekammeret 37 i prioritetsventilen 21 gennem ledningen 39.the pump 31 for the connection 24 in the priority valve 21, whose slides 22 are in the position 29 under the influence of the spring 23. In this position of the priority valve 21, the hydraulic pump 31 is in communication 5 with the pressure line 33 through the connection 26, and with the accumulator 42 through the connection 28. On at the same time, the working fluid to the control chamber 37 in the priority valve 21 flows through the conduit 39.
Trykket, der opbygges i styrekammeret 37, for-10 skyder glideren 22 til sin anden stilling 25, i hvilken akkumulatoren 42's forbindelse med hydraulikpumpen 31 via tilslutningen 29 afbrydes.The pressure built up in the control chamber 37 moves the slider 22 to its second position 25 in which the connection of the accumulator 42 with the hydraulic pump 31 via the connection 29 is interrupted.
I denne stilling af prioritetsventilen 21 står hydraulikpumpen 31 i forbindelse med arbejdsudstyrets 15 hydraulikanlæg 1 og med ledningen 33 gennem prioritetsventilen 21's tilslutning 27 og ledningen 34.In this position of the priority valve 21, the hydraulic pump 31 communicates with the hydraulic system 1 of the working equipment 15 and with the line 33 through the connection 27 of the priority valve 21 and the line 34.
Når arbejdsudstyrets hydraulikanlæg 1 er uvirksomt aflastes hydraulikpumpen 31 gennem anlægget 1.When the work equipment hydraulic system 1 is idle, the hydraulic pump 31 is relieved through the system 1.
Med arbejdsudstyret i drift forsynes hydraulikanlægget 1 20 fra pumpen 31. Hydraulikanlægget l's arbejdsudstyr er beskyttet mod overbelastning ved hjælp af sikkerhedsventilen 35 på kendt måde.With the work equipment in operation, the hydraulic system 1 20 is supplied from the pump 31. The working equipment of the hydraulic system 1 is protected against overload by the safety valve 35 in known manner.
Akkumulatoren 42 kan oplades fuldstændig ved hjælp af hydraulikpumpen 44, som sender arbejdsflui-25 dummet ind i den hydrauliske akkumulator 42 gennem ledningen 47 og kontraventilen 48. Så snart det forudbestemte tryk er nået, forbinder ladeventilen 50 ledningen 47 med ledningen 54, hvorved opladningen af akkumulatoren 42 stoppes, og hydraulikpumpen 44 30 aflastes. Kontraventilen 48 forhindrer akkumulatoren 42 i at blive aflastet gennem ledningen 47.The accumulator 42 can be fully charged by means of the hydraulic pump 44 which sends the working fluid into the hydraulic accumulator 42 through the conduit 47 and the check valve 48. Once the predetermined pressure is reached, the charging valve 50 connects the conduit 47 to the conduit 54, thereby charging the the accumulator 42 is stopped and the hydraulic pump 44 30 is relieved. The check valve 48 prevents the accumulator 42 from being relieved through the conduit 47.
Når rattet 5 drejes, indtager styreraekanismen 4's styreventil 6 en af sine arbejdsstillinger, f.eks. stillingen 14.When the steering wheel 5 is turned, the control valve 6 of the control mechanism 4 occupies one of its working positions, e.g. position 14.
35 I denne stilling 14 står ledningen 38, som styrer prioritetsventilen 21, i forbindelse med styre- 935 In this position 14, the conduit 38 which controls the priority valve 21 is in communication with the control 9
DK 154016 BDK 154016 B
ventilen 6's tilslutning 10 gennem tilslutningen 9, og med tilslutningen 8 gennem drøvleventilen 15. Som følge af dette står prioritetsventilen 21's styrekammer 36 i forbindelse' med arbejdsledningen 17, og 5 gennem drøvleventilen 15 med trykledningen 33. Når dette sker, udsættes prioritetsventilen 21*s glider 22 for en trykforskel mellem opstrøms- og nedstrøms siderne af drøvleventilen 15, hvis åbning varierer med forskydningen af styreventilen 6.the connection 10 of the valve 6 through the connection 9, and with the connection 8 through the throttle valve 15. As a result, the control chamber 36 of the priority valve 21 communicates with the working line 17, and 5 through the throttle valve 15 with the pressure line 33. When this occurs, the priority valve 21 * s slides 22 for a pressure difference between the upstream and downstream sides of the throttle valve 15, the opening of which varies with the displacement of the control valve 6.
10 Derfor vil glideren 22 bevæge sig til en stil ling, i hvilken ledningen 34, som løber til arbejdsudstyrets hydraulikanlæg 1, sættes ude af forbindelse med hydraulikpumpen 31, og trykledningen 33 forbindes med pumpen.Therefore, the slider 22 will move to a position in which the line 34 running to the hydraulic system 1 of the work equipment is disconnected from the hydraulic pump 31 and the pressure line 33 is connected to the pump.
15 Arbejdsledningen 18 står i forbindelse med re turledningen 19 gennem tilslutningerne 11 og 12. Arbejdsfluidummet strømmer ind i cylinderen 2 gennem arbejdsledningen 17 og løber ind i reservoiret 20 gennem ledningen 18 og styreventilen 6.The work line 18 communicates with the return line 19 through the connections 11 and 12. The working fluid flows into the cylinder 2 through the work line 17 and flows into the reservoir 20 through the line 18 and the control valve 6.
20 Tilbagekoblingsmekanismen 7 returnerer styre ventilen 6 til sin neutralstilling 13, så snart rattet 5 frigives.The feedback mechanism 7 returns the control valve 6 to its neutral position 13 as soon as the steering wheel 5 is released.
Når rattet 5’s omdrejningshastighed forøges, bevæges styreventilen 6 længere væk fra sin neutral-25 stilling 13 til stillingen 14, hvorved den bevirker en mere intensiv strøm af arbejdsfluidum til cylinderen 2, en større åbning af drøvleventilen 15, en mindre trykdifferens over den sidstnævnte og i styrekamrene 36 og 37 i prioritetsventilen 21, og som en følge heraf 30 forskydning af glideren 22 til stillingen 29 under indvirkning af fjederen 23.As the speed of rotation of the steering wheel 5 increases, the control valve 6 moves further away from its neutral position 13 to the position 14, thereby causing a more intense flow of working fluid to the cylinder 2, a larger opening of the throttle valve 15, a smaller pressure difference over the latter and the control chambers 36 and 37 of the priority valve 21, and as a result 30 displacement of the slider 22 to the position 29 under the action of the spring 23.
Når glideren 22 indtager stillingen 29, resulterer dette i en større strømningshastighed af arbe jdsfluidummet, som strømmer til cylinderen 3 gennem 35 styremekanismen 4.As the slider 22 takes up position 29, this results in a greater flow rate of the working fluid flowing to the cylinder 3 through the control mechanism 4.
• Såfremt hydraulikpumpen 31’ s kapacitet er mindre end den, der kræves for styring af transportmidlet• If the capacity of the hydraulic pump 31 is less than that required for controlling the means of transport
Claims (1)
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU833610023A SU1230906A1 (en) | 1983-06-22 | 1983-06-22 | United hydraulic system for steering control and extra user on vehicle (versions) |
| SU3610023 | 1983-06-22 | ||
| PCT/SU1984/000032 WO1985000150A1 (en) | 1983-06-22 | 1984-06-21 | Hydraulic system for a vehicle |
| SU8400032 | 1984-06-21 |
Publications (4)
| Publication Number | Publication Date |
|---|---|
| DK80085D0 DK80085D0 (en) | 1985-02-21 |
| DK80085A DK80085A (en) | 1985-02-21 |
| DK154016B true DK154016B (en) | 1988-10-03 |
| DK154016C DK154016C (en) | 1989-02-13 |
Family
ID=21070093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK080085A DK154016C (en) | 1983-06-22 | 1985-02-21 | HYDRAULIC PLANT FOR TRANSPORT |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS60501601A (en) |
| BG (3) | BG45602A1 (en) |
| DE (1) | DE3490305T1 (en) |
| DK (1) | DK154016C (en) |
| SU (3) | SU1230906A1 (en) |
| WO (1) | WO1985000150A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19531413B4 (en) * | 1995-08-26 | 2007-09-20 | Bosch Rexroth Aktiengesellschaft | Arrangement for supplying the hydraulic steering of a motor vehicle |
| CA2630199A1 (en) * | 2008-05-01 | 2009-11-01 | Multimatic Inc. | Vehicle auxiliary hydraulic system |
| CN101975271B (en) * | 2010-11-03 | 2013-11-20 | 薛殿伦 | Hierarchical combined oil pump for automatic transmission |
| RU171215U1 (en) * | 2017-01-10 | 2017-05-24 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Сибирская государственная автомобильно-дорожная академия" (СибАДИ) | HYDRAULIC STEERING |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924891U (en) * | 1972-06-08 | 1974-03-02 | ||
| DE2721556A1 (en) * | 1977-05-13 | 1978-11-16 | Zahnradfabrik Friedrichshafen | Fail=safe servo steering with two hydraulic circuits - has third standby servo pump on vehicle to replace defective pump |
| DE2742688A1 (en) * | 1977-09-22 | 1979-04-05 | Zahnradfabrik Friedrichshafen | HYDRAULIC POWER STEERING WITH POWER SUPPLY DEVICE WITH PRESSURE ACCUMULATOR |
| AU530294B2 (en) * | 1978-12-25 | 1983-07-07 | K.K. Komatsu Seisakusho | Vehicle priority demand circuit |
| DE2934221C2 (en) * | 1979-08-24 | 1982-12-23 | Danfoss A/S, 6430 Nordborg | Hydraulic steering and working equipment for vehicles |
| US4453451A (en) * | 1980-11-10 | 1984-06-12 | Fiatallis North America, Inc. | Hydraulic steering system with automatic emergency pump flow control |
-
1983
- 1983-06-22 SU SU833610023A patent/SU1230906A1/en active
- 1983-06-22 SU SU833610023L patent/SU1230908A1/en active
- 1983-06-22 SU SU833610023K patent/SU1230907A1/en active
-
1984
- 1984-06-21 DE DE19843490305 patent/DE3490305T1/en not_active Withdrawn
- 1984-06-21 WO PCT/SU1984/000032 patent/WO1985000150A1/en active Application Filing
- 1984-06-21 JP JP50286184A patent/JPS60501601A/en active Pending
- 1984-08-28 BG BG6671784A patent/BG45602A1/en unknown
- 1984-08-28 BG BG6671684A patent/BG45601A1/en unknown
- 1984-08-28 BG BG6671884A patent/BG45603A1/en unknown
-
1985
- 1985-02-21 DK DK080085A patent/DK154016C/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| DE3490305T1 (en) | 1985-05-30 |
| SU1230906A1 (en) | 1986-05-15 |
| DK80085D0 (en) | 1985-02-21 |
| DK80085A (en) | 1985-02-21 |
| SU1230908A1 (en) | 1986-05-15 |
| BG45602A1 (en) | 1989-07-14 |
| BG45603A1 (en) | 1989-07-14 |
| WO1985000150A1 (en) | 1985-01-17 |
| JPS60501601A (en) | 1985-09-26 |
| BG45601A1 (en) | 1989-07-14 |
| SU1230907A1 (en) | 1986-05-15 |
| DK154016C (en) | 1989-02-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| FI70075B (en) | HYDROSTATISKT DRIVSYSTEM | |
| JPH0432257B2 (en) | ||
| CN101094999A (en) | Hydrostatic drive with speed limitation | |
| US4418612A (en) | Power transmission | |
| US3941514A (en) | Torque limiting control | |
| CN101171429B (en) | Self-synchronizing hydraulic system | |
| US3247669A (en) | Hydrostatic transmission | |
| NZ200515A (en) | Hydraulic control system with pilot controlled meter-in valve | |
| CN203892295U (en) | Meterless hydraulic system having flow sharing and combining functions | |
| CA1163528A (en) | Power transmission | |
| US4568292A (en) | Hydraulic assistance device for use in a steering system | |
| DK154016B (en) | HYDRAULIC PLANT FOR TRANSPORT Means | |
| GB1567105A (en) | Track drive circuits with synchronization and steering systems | |
| SE443409B (en) | VALVE DEVICE FOR CONTROL OF THE FUNCTION OF A HYDRAULIC ENGINE | |
| CA1186593A (en) | Hydraulic steering system control | |
| JPH0529586B2 (en) | ||
| JPS6354594B2 (en) | ||
| RU2060386C1 (en) | Hydraulic system of mining machine | |
| GB2042443A (en) | Hydraulic powerassisted steering system | |
| WO1981001123A1 (en) | Steering system for cold environments | |
| SU1197945A1 (en) | Hydraulic system of vehicle steering gear | |
| CN217002449U (en) | Crawler-type tractor hydraulic control system and tractor | |
| USRE30226E (en) | Torque limiting control | |
| CN215719882U (en) | Multi-mode control system suitable for EHA | |
| SU1150139A1 (en) | Hydraulic system of vehicle with positive-displacement hydraulic transmission |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PBP | Patent lapsed |