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US 9,810,329 B2Granted
Valve group and inlet module of a valve group
AssigneeDanfoss Power Solutions ApS
InventorFrede Callesen
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AssigneeDanfoss Power Solutions ApS
InventorFrede Callesen
Estimating the term…
A valve group includes an inlet module and at least one service module connected to the inlet module, the inlet module having a housing, a pressure port, a pressure gallery, a tank port, a tank gallery, a spool movable in the housing to interrupt in a first position a connection between the pressure port and the pressure gallery and to connect in a second position the pressure port and the pressure gallery. A first pressure transducer is provided to detect a first pressure in the pressure gallery and a second pressure transducer is provided to detect a second pressure in the tank gallery, the pressure transducers being connected to a controller determining the position of the spool based on the pressures read from the pressure transducers.
A valve group comprising an inlet module and at least one service module connected to said inlet module, said inlet module having a housing, a pressure port (PP), a pressure gallery (PG), a tank port (TP), a tank gallery (TG), a load sensing port (LS), a high pressure carry over port (HPCO) and a spool movable in said housing to interrupt in a first position (A) a connection between said pressure port (PP) and said pressure gallery (PG) and to connect in a second position (B) said pressure port (PP) and said pressure gallery (PG), wherein said spool in said first position (A) connects said pressure gallery (PG) and said tank gallery (TG), wherein a first pressure transducer is provided to detect a first pressure in said pressure gallery (PG) and a second pressure transducer is provided to detect a second pressure in said tank gallery (TG), said first pressure transducer and said second pressure transducer being connected to a controller determining the position of said spool to be said first position (A) when said first transducer and said second transducer read a same pressure below a predetermined first threshold pressure and to be said second position (B) when said first pressure transducer reads a higher pressure than said second pressure transducer, wherein said spool comprises a first groove and a second groove on the outside, and a channel inside, wherein in said first position said first groove connects said pressure gallery (PG) and said tank gallery (TG) and said second groove connects said tank gallery (TG) and said tank port (TP), and said channel connects said load sensing port (LS), said high pressure carry over port (HPCO) and said tank port (TP).
A valve group comprising an inlet module and at least one service module connected to said inlet module, said inlet module having a housing, a pressure port (PP), a pressure gallery (PG), a tank port (TP), a tank gallery (TG), a spool movable in said housing to interrupt in a first position (A) a connection between said pressure port (PP) and said pressure gallery (PG) and to connect in a second position (B) said pressure port (PP) and said pressure gallery (PG), wherein said spool in said first position (A) connects said pressure gallery (PG) and said tank gallery (TG), wherein a first pressure transducer is provided to detect a first pressure in said pressure gallery (PG) and a second pressure transducer is provided to detect a second pressure in said tank gallery (TG), said first pressure transducer and said second pressure transducer being connected to a controller determining the position of said spool to be said first position (A) when said first transducer and said second transducer read a same pressure below a predetermined first threshold pressure and to be said second position (B) when said first pressure transducer reads a higher pressure than said second pressure transducer, wherein said inlet module comprises a load sensing port (LS) and a high pressure carry over port (HPCO), wherein said spool is movable in a third position (C), in which said pressure gallery (PG) is blocked, said high pressure carry over port (HPCO) is connected to said pressure port (PP), and said load sensing port (LS) is connected to said tank gallery (TG), and said controller determines the position of said spool to be said third position (C) when said first pressure transducer reads a pressure lower than said second pressure transducer, and wherein said spool is movable in a fourth position (D), in which said pressure port (PP) is connected to said pressure gallery (PG), said high pressure carry over port (HPCO) is blocked, said load sensing port (LS) is connected to said pressure gallery (PG), and to said tank gallery (TG) and said controller determines the position of said spool to be said fourth position (D) when said first pressure transducer and said second pressure transducer read the same pressure higher than a predetermined second threshold pressure.
An inlet module for a valve group, the inlet module comprising a housing, a pressure port (PP), a pressure gallery (PG), a tank port (TP), a tank gallery (TG), a load sensing port (LS), a high pressure carry over port (HPCO) and a spool movable in said housing to interrupt in a first position (A) a connection between said pressure port (PP) and said pressure gallery (PG) and to connect in a second position (B) said pressure port (PP) and said pressure gallery (PG), wherein said spool in said first position (A) connects said pressure gallery (PG) and said tank gallery (TG), wherein a first pressure transducer is provided to detect a first pressure in said pressure gallery (PG) and a second pressure transducer is provided to detect a second pressure in said tank gallery (TG), said first pressure transducer and said second pressure transducer being connected to a controller determining the position of said spool to be said first position (A) when said first transducer and said second transducer read a same pressure below a predetermined first threshold pressure and to be said second position (B) when said first pressure transducer reads a higher pressure than said second pressure transducer, wherein said spool comprises a first groove and a second groove on the outside, and a channel inside, wherein in said first position said first groove connects said pressure gallery (PG) and said tank gallery (TG) and said second groove connects said tank gallery (TG) and said tank port (TP), and said channel connects said load sensing port (LS), said high pressure carry over port (HPCO) and said tank port (TP).
Dependencies are inferred from the claim text.
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From the US filing history. Foreign family members aren’t listed.
No references of this kind are recorded.
With all movable sealing faces moving as one unit: comprising only sliding valves , i.e. sliding closure elements
Electrical details: sensing means, e.g. pressure sensors
Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for:…
Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator…:…
About 9 years 2 months of term left · ends 17 Dec 2035 (estimated)
Applicant hereby claims foreign priority benefits under U.S.C. §119 from European Patent Application No. EP 14193200 filed on Nov. 14, 2014, the contents of which are incorporated by reference herein.
The present invention relates to a valve group comprising an inlet module and at least one service module connected to said inlet module, said inlet module having a housing, a pressure port, a pressure gallery, a tank port, a tank gallery, a spool movable in said housing to interrupt in a first position a connection between said pressure port and said pressure gallery and to connect in a second position said pressure port and said pressure gallery.
Furthermore, the invention relates to an inlet module of such a valve group.
A preferred embodiment of the invention will now be described in more detail with reference to the drawing, wherein:
FIG. 1 shows schematically a valve group,
FIG. 2 shows an inlet module of the valve group with a spool in a first position,
FIG. 1 schematically shows a valve group 1 having three service modules 2, 3, 4 and an inlet module 5. The service modules 2, 3, 4 are connected to the inlet module 5. Furthermore, each service module is provided to control the operation of a hydraulic consumer 6, 7, 8. The inner construction of the service modules 2-4 depends on their function. Such service modules 2-4 are known per se. They are not described in more detail here.
The inlet module 5 comprises a pressure port PP, which is connected to a pump 9 or any other pressure force. Furthermore, the inlet module 5 comprises a tank port TP which is connected to a tank 10.
Furthermore, the inlet module 5 comprises a load sensing port LS which is connected to a load sensing line 11 of the inlet module 5. The inlet module 5 comprises furthermore a pressure gallery PG connected to a pressure line 12 supplying all service modules 2, 3, 4 with hydraulic fluid under pressure, if the inlet module 5 establishes a connection between the pressure port PP and the pressure gallery PG. Furthermore, the inlet module 5 comprises a tank gallery TG connected to a tank line 13 running through all service modules 2, 3, 4. Finally, the inlet module 5 comprises a high pressure carry over port HPCO connected to a line 14 leading out of the valve group 1, for example to another valve group 1.