EP0227716A1 - Schaltungsanordnung für die hydraulische beaufschlagung der aggregate eines laders. - Google Patents
Schaltungsanordnung für die hydraulische beaufschlagung der aggregate eines laders.Info
- Publication number
- EP0227716A1 EP0227716A1 EP19860903295 EP86903295A EP0227716A1 EP 0227716 A1 EP0227716 A1 EP 0227716A1 EP 19860903295 EP19860903295 EP 19860903295 EP 86903295 A EP86903295 A EP 86903295A EP 0227716 A1 EP0227716 A1 EP 0227716A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- control valve
- pump
- loader
- cylinder
- main control
- 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.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
Definitions
- Circuit arrangement for the hydraulic loading of the units of a loader
- the invention relates to a circuit arrangement for the hydraulic loading of the units of a charger, such as traction motors, loading shovel equipped with impact devices, cylinder-piston units or the like.
- Such loaders are advantageously used for demolishing the sole in mine rooms; however, these are also suitable for carrying out work above ground.
- Loaders which each have their own energy source in the form of a pump for each consumer group, such as traction motors, cylinder-piston working cylinders and for the impact devices of the loading shovel. It is known to design these pumps in a power-controlled manner for the ancillary motors or in a pressure-controlled manner for the cylinder-piston units and the impact devices in order to be able to adapt them to the respective requirements.
- this known solution proves to be disadvantageous because the total installed power is very high because it is the sum of all installed pumps for which power must be kept. The entire installation is therefore very costly and space-consuming.
- the invention has for its object to provide a circuit arrangement of the type mentioned, which makes it possible with a minimum of installed power to fully cover all load situations occurring in the practice of a loader at any time.
- the switching arrangement has a double pump with different outputs, which pumps are connected to a main control valve, in the first position of which the pump with the higher output with the control valve for the traction motors and the pump with the lower output with the control valve for the cylinder-piston units or the like. is connected, while in the second position of the main control valve the pump with the higher output is connected to the control valves for the cylinder-piston inputs units or the like and the impact devices of the loading shovel and the pump with the lower output are connected to the control valve for the drive motors.
- This configuration ensures that the pump with the higher output impacts the traction motors while the loader is traveling, ie the charger runs at high speed, while at the same time the cylinder-piston units operate via the pump with the lower output be fed.
- the impact devices of the loading shovel which are not required while the loader is moving, are not subjected to any action in this first position of the main control valve. If the loader has reached the lowering joint or the rock with the edge of its loading shovel, the operator or himself, due to the increased load pressure on the traction motors, switches the main control valve to its second position, with the result that the impact devices are now taken up by the pump the higher power can be applied so that the destruction and removal work can be carried out.
- the cylinder-piston units of the charger are connected to this pump stage.
- the traction motors are in this second position of the main control valve with the pump with the low one Performance in connection, so that the loader moves only at low driving speed, which is however completely sufficient during the loosening or loading work.
- the operator switches off the impact devices, as a result of which the main control valve is moved back into its first position, since the pump with the higher output is switched back to the traction motors and the pump with the lower output again the on the cylinder-piston units without the impact devices.
- the loader can now drive to the unloading point at full speed.
- the common drive of the double pump is designated by 1, the pump of which has a higher output with 2 and whose pump has a lower output with 3.
- the two pumps 2, 3 are connected to the main control valve 4.
- the pump 2 with the higher output is connected to the control valve 5 for the drive motors of the loader, not shown, while the pump 3 with the lower output is connected to the control valve 6 for the individual cylinder-piston Units of the loader is connected.
- the connection to the control valve 7 for the impact devices of the loading shovel of the loader is depressurized because these are not required during the movement of the loader.
- the pump 2 with the higher power to the control valves 6 and 7 is once for the cylinder-piston units and the other for the impact devices ⁇ te switched on so that the higher power is applied to them, in particular the striking devices which they need to loosen and smash them.
- the pump 3 with the lower power is connected in the position to the control valve 5 for the traction motors, so that the loader only works with lower driving speed is movable.
- the main control slide 4 is switched back into its first position, so that the starting situation described above is obtained.
- the traction motors are again acted upon by the pump 2 with the higher power, i.e. the loader can be moved to the unloading point at high driving speed, while the impact devices are completely switched off and the cylinder-piston units of the loader are acted upon by the pump 3 with the low power.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19853516429 DE3516429A1 (de) | 1985-05-08 | 1985-05-08 | Schaltungsanordnung fuer die hydraulische beaufschlagung der aggregate eines laders |
DE3516429 | 1985-05-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0227716A1 true EP0227716A1 (de) | 1987-07-08 |
EP0227716B1 EP0227716B1 (de) | 1989-02-08 |
Family
ID=6270065
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19860903295 Expired EP0227716B1 (de) | 1985-05-08 | 1986-04-19 | Schaltungsanordnung für die hydraulische beaufschlagung der aggregate eines laders |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0227716B1 (de) |
DE (1) | DE3516429A1 (de) |
SU (1) | SU1595347A3 (de) |
WO (1) | WO1986006772A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3728994A1 (de) * | 1987-08-29 | 1989-03-09 | Piv Antrieb Reimers Kg Werner | Einrichtung zur versorgung eines hauptverbrauchers mit hydraulischem druckmittel |
DE19717708C2 (de) * | 1997-04-18 | 1999-11-18 | Mannesmann Ag | Hydraulischer Antrieb für ein fahrbares Arbeitsgerät |
CN102536931A (zh) * | 2011-12-23 | 2012-07-04 | 航天长征化学工程股份有限公司 | 耙料机用可反转液压驱动系统 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3606049A (en) * | 1969-11-12 | 1971-09-20 | Harnischfeger Corp | Horsepower limiting hydraulic control circuit |
BE794481A (fr) * | 1972-01-24 | 1973-05-16 | Kubota Ltd | Pelle mecanique pour travaux de terrassement |
FR2250908B3 (de) * | 1973-11-14 | 1977-08-12 | Massey Ferguson Services Nv | |
JPS6129813Y2 (de) * | 1980-07-07 | 1986-09-02 |
-
1985
- 1985-05-08 DE DE19853516429 patent/DE3516429A1/de not_active Ceased
-
1986
- 1986-04-19 WO PCT/EP1986/000240 patent/WO1986006772A1/de active IP Right Grant
- 1986-04-19 EP EP19860903295 patent/EP0227716B1/de not_active Expired
-
1987
- 1987-01-07 SU SU874028944A patent/SU1595347A3/ru active
Non-Patent Citations (1)
Title |
---|
See references of WO8606772A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3516429A1 (de) | 1986-11-13 |
WO1986006772A1 (en) | 1986-11-20 |
EP0227716B1 (de) | 1989-02-08 |
SU1595347A3 (ru) | 1990-09-23 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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GBPC | Gb: european patent ceased through non-payment of renewal fee |