Hydraulic Control Block And Hydraulic System

• US 20130319561A1
• Filed: 05/23/2013
• Published: 12/05/2013
• Est. Priority Date: 05/31/2012
• Status: Abandoned Application

• Current Assignee: Liebherr-France SAS (Liebherr-International AG)
• Original Assignee: Liebherr-France SAS (Liebherr-International AG)
• Inventors: HELBLING, Frank, MUELLER, Christoph
• Application Number:
  US13/901,276
• Publication Number:
  US 20130319561A1
• Time in Patent Office: Days
• US Class Current: 137/884
• CPC Class Codes: F15B 11/17 using two or more pumps
• CPC Class Codes: F15B 13/0803 Modular units
• CPC Class Codes: F15B 2211/20576 with multiple pumps
• CPC Class Codes: F15B 2211/30595 with additional valves between the groups of valves for multiple output members
• CPC Class Codes: F15B 2211/411 the positions being discrete
• CPC Class Codes: F15B 2211/41509 being connected to a pressure source and a directional control valve
• CPC Class Codes: F15B 2211/7142 the output members being arranged in multiple groups
• CPC Class Codes: F15B 2211/781 one or more output members having priority
• CPC Class Codes: Y10T 137/87885 Sectional block structure

Abstract

A hydraulic control block has at least two pressure supply circuits, which each include one or more hydraulic consumer ports, and at least two hydraulic pump ports. A valve arrangement is provided, by way of which each of the at least two pump ports can selectively connect with at least one of the pressure supply circuits selectively individually or in combination with at least one of the remaining pump ports. At least one direct connection of a consumer port is provided per pump port.

Claims

1. A hydraulic control block comprising:

at least two pressure supply circuits, each of the pressure supply circuits including at least one hydraulic consumer port,

at least two hydraulic pump ports, and

a valve arrangement, by which each of the at least two pump ports selectively is connectable with at least one pressure supply circuit individually or in combination with at least one of the remaining pump ports,

wherein at least one direct connection of a consumer port is provided per pump port.

2. The control block according to claim 1, wherein the valve arrangement comprises at least four directional valves, and wherein each pump port selectively is connectable with one or more of the at least two supply circuits via at least two valves.

3. The control block according to claim 1, wherein the at least one consumer port of the pressure supply circuits is connected with the at least one pressure supply circuit via at least one control valve for consumer control.

4. The control block according to claim 1, wherein the at least one consumer port is connected with at least one of the pump ports via at least one control valve.

5. The control block according to claim 4, wherein the at least one control valve is a 6/3-way valve, a 4/3-way valve, a combination of logic valves with or without flow control function, or a directional valve with upstream or downstream pressure scale.

6. The control block according to claim 1, wherein at least one of the pump ports includes at least one parallel shut-down path.

7. The control block according to claim 6, wherein the shut-down path provides a direct connection switchable by means of a valve between pump port and hydraulic tank.

8. The control block according to claim 1, wherein at least one valve of the valve arrangement and/or a shut-down path is a black-and-white or proportional valve, a piston valve, a logic valve in cartridge construction, a flow control valve or a pressure limiting valve.

9. The control block according to claim 1, wherein the at least one consumer port is connected with at least one of the pressure supply circuits or with at least one of the pump ports via at least one check valve.

10. The control block according to claim 1, wherein a consumer port of at least one of the pressure supply circuits additionally is connected with at least one direct connection of a pump port via a valve.

11. A hydraulic system for hydraulic control of a construction machine comprising at least one control block according to claim 1.

12. A construction machine, earth-moving machine, transportation implement, or lifting gear, comprising a control block according to claim 1.

13. The control block according to claim 3, wherein the at least one control valve is a 6/3-way valve, a 4/3-way valve, a combination of logic valves with or without flow control function, or a directional valve with upstream or downstream pressure scale.

14. A hydraulic system for hydraulic control of a construction machine comprising at least one control block according to claim 2.

15. A hydraulic system for hydraulic control of a construction machine comprising at least one control block according to claim 3.

16. A hydraulic system for hydraulic control of a construction machine comprising at least one control block according to claim 4.

17. A construction machine, earth-moving machine, transportation implement, or lifting gear, comprising a control block according to claim 2.

18. A construction machine, earth-moving machine, transportation implement, or lifting gear, comprising a control block according to claim 3.

19. A construction machine, earth-moving machine, transportation implement, or lifting gear, comprising a control block according to claim 4.

20. A construction machine, earth-moving machine, transportation implement, or lifting gear, comprising a control block according to claim 5.