公开(公告)号：US20210190066A1

公开(公告)日：2021-06-24

申请号：US17039210

申请日：2020-09-30

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen

IPC: F04B53/10

Abstract: A valve plate assembly (1) of a hydraulic axial piston machine is described, the valve plate assembly comprising a wear plate (2) made of a ceramic material surrounded by a compression ring (4). Such a valve plate assembly should be produced and maintained in a cost-effective manner. To this end, the wear plate (2) is connected to a support plate (3) by means of the compression ring (4).

公开(公告)号：US11035351B2

公开(公告)日：2021-06-15

申请号：US16254955

申请日：2019-01-23

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Georg Herborg Enevoldsen ,  Sveinn Porarinsson

IPC: F04B11/00 ,  F04B1/20 ,  F04B1/2014 ,  F03C1/06 ,  F04B1/2021 ,  F01B3/00

Abstract: A hydraulic machine is described comprising a first part (1, 4) and a second part (7, 8), wherein the first part (1, 4) and the second part (7, 8) are movable relatively to each other in abutting relation, the first part (1, 4) comprises a pressure chamber (2) having a pressure chamber opening (6) in a contact face (5) contacting a sealing face (9) of the second part (7, 8), the second part (7, 8) comprises a low pressure area (10) connected to a low pressure opening (11) in the sealing face (9) and a high pressure area (12) connected to a high pressure opening (13) in the sealing face (9), wherein during a movement of the first part (1, 4) with respect to the second part (7, 8) in a moving direction (14) the pressure chamber opening (6) comes alternatingly in overlap with the low pressure opening (11) and the high pressure opening (13). Such a machine should be flexible in operation with low risk of damages caused by cavitation. To this end a throttling channel (15) in the second part (7, 8) connects the low pressure area (10) with an area in the sealing face (9) in moving direction in front of the low pressure opening (11).

公开(公告)号：US20200370570A1

公开(公告)日：2020-11-26

申请号：US16879285

申请日：2020-05-20

Applicant: Danfoss A/S

Inventor： Georg Enevoldsen ,  Poul Erik Hansen ,  Frank Holm Iversen

IPC: F15B3/00 ,  F15B20/00

Abstract: The invention relates to a device for supplying ports to a machine section (26) of a hydraulic machine arrangement (40), the device (10) comprising a low-pressure inlet port (12), a leakage inlet (16), a low-pressure chamber (18) having a low-pressure opening (22) for establishing fluid communication with the machine section (26), a high-pressure outlet port (14), and a high-pressure chamber (20) that is in fluid communication with the high-pressure outlet port (14), the high-pressure chamber (20) having a high-pressure opening (24) for establishing fluid communication with the machine section (26), wherein the low-pressure inlet port (12) is in fluid communication with the low-pressure chamber (18), wherein a leakage path (36) extends from the high-pressure chamber (20) through the machine section (26) to the leakage inlet (16), characterized in that the device (10) further comprises a control valve member (28) connecting the leakage inlet (16) to the low-pressure chamber (18), wherein the control valve member (28) transfers to an open state when a pressure in the leakage inlet (16) with respect to a pressure in the low-pressure chamber (18) is higher than a predefined control pressure threshold. The device (10) reduces cavitation in hydraulic machine arrangements (40).

公开(公告)号：US20200225094A1

公开(公告)日：2020-07-16

申请号：US16832658

申请日：2020-03-27

Applicant: Danfoss A/S

Inventor： Tom Christensen

IPC: G01K1/08 ,  G01K7/18 ,  G01K13/02

Abstract: The present invention relates to a tubular wire shielding (9) for an exhaust gas temperature sensor arrangement (1), the tubular wire shielding (9) comprising a first shielding tube (13) comprising one or more through channels for accommodating one or more wires (6a, 6b, 8a, 8b, 11a, 11b) and/or for accommodating one or more temperature measurement sensors (7), the tubular wire shielding (9) furthermore comprising a second shielding tube (14) radially surrounding the first shielding tube (14). It is an object of the invention to provide a tubular wire shielding (9) and an exhaust temperature sensor arrangement (1) which are of good mechanical stability. The object is solved in that the tubular wire shielding (9) comprises a first tube adhesive layer (15) arranged interposed between the first shielding tube (13) and the second shielding tube (14), the first tube adhesive layer (15) fixing the first shielding tube to the second shielding tube (14). Furthermore, the object is solved by an exhaust gas temperature sensor arrangement (1), preferably comprising such a wire shielding (9), and a method for assembling the exhaust gas temperature sensor arrangement (1).

公开(公告)号：US10557473B2

公开(公告)日：2020-02-11

申请号：US15120699

申请日：2014-02-20

Applicant: DANFOSS A/S

Inventor： William Turner Thornton ,  Lin Sun

IPC: F04D27/02 ,  F04D27/00 ,  F04D29/058 ,  F25B1/053 ,  F04D17/12 ,  F04D29/44 ,  F25B1/10

Abstract: This disclosure relates to a control system and method for the centrifugal compressor. The system, for example, includes a controller configured command an adjustment of at least one of (1) a flow regulator and (2) a speed of a shaft in order to provide safe, efficient compressor operation. Centrifugal compressors are used to circulate refrigerant in a chiller via a refrigerant loop. Centrifugal compressors operate efficiently before reaching a condition known as surge.

公开(公告)号：US10551102B2

公开(公告)日：2020-02-04

申请号：US15543268

申请日：2016-01-05

Applicant: DANFOSS A/S

Inventor： Jens Erik Rasmussen

IPC: F25B41/06 ,  G01K5/32

Abstract: A bulb (5) for a thermostatic expansion valve is provided, said bulb (5) comprising a chamber (7), said chamber (7) being located within a metallic casing of said bulb and being filled with a filling adapted to influence a valve element of said thermostatic expansion valve. Service of a temperature controlled valve connected to a bulb should be facilitated. To this end said bulb (5) comprises a connection geometry (10) adapted to be connected to a capillary member (6) and said casing being provided with a closed opening zone located within said connection geometry (10), said opening zone being adapted to be opened upon mounting a counterpart (15) to said connection geometry (10).

公开(公告)号：US20200003192A1

公开(公告)日：2020-01-02

申请号：US16455888

申请日：2019-06-28

Applicant: Danfoss A/S

Inventor： Tianlei Li ,  Lin Sun ,  Mihai Bogdan Dobrica

IPC: F04B7/00 ,  F16J15/3288 ,  F25B11/04 ,  F04B43/00

Abstract: A centrifugal compressor for HVAC application includes a rotary component rotatable about an axis, a static component, and a brush seal fixed to one of the static component and the rotary component. The brush seal includes bristles that contact the other of the static component and the rotary component.

公开(公告)号：US10443753B2

公开(公告)日：2019-10-15

申请号：US14760852

申请日：2014-01-15

Applicant: Danfoss A/S

Inventor： Johan van Beek ,  Michael Birkelund

IPC: F16K31/00 ,  F16K31/02 ,  F25B41/06

Abstract: The invention relates to an actuator for a valve in a refrigeration system. The invention also relates to a valve with such actuator, and to a refrigeration system with such valve. The actuator comprises an elongated Shape Memory Alloy (SMA) element extending along two or more string-like extensions from a distant end to a proximate end in relation to a valve element of a valve. The SMA element, when forming part of the valve, may extend from the distant end to the proximate end connected to a housing of the SMA element, however, electrically insulated from the housing. An encapsulation may provide a thermal resistance, a thermal conductor and/or an electrical resistance between the SMA element and other elements or the surroundings of the SMA element.

公开(公告)号：US10443750B2

公开(公告)日：2019-10-15

申请号：US15743322

申请日：2016-05-26

Applicant: DANFOSS A/S

Inventor： Behzad Parastar ,  Detlef Matzen ,  Klaus Halldorsson ,  Simon Ahrens Lassen

IPC: F16K27/02 ,  F16K31/08 ,  F16K17/06 ,  F16K31/10 ,  F16K15/02 ,  F16K31/04

Abstract: The invention relates to a pilot valve arrangement (1) comprising a pilot valve device (2) which comprises a pilot valve element (13), a pilot valve seat (14) cooperating with the pilot valve element (13) and a presetting mechanism for presetting an opening pressure of the pilot valve element (13), the pilot valve arrangement (1) further comprising a presetting mechanism actuating device (3) which comprises an actuator element (17) adapted to create an actuating force in order to actuate the presetting mechanism in the pilot valve device so as to preset the opening pressure. According to the invention, the pilot valve arrangement (1) comprises a contactless force coupling arrangement adapted to transfer the actuating force from the presetting mechanism actuating device (3) to the pilot valve device (2). An inventive pilot valve device (2) is disclosed and claimed as well. The invention allows to improve maintenance and safety concerning the devices mentioned above.

公开(公告)号：US10436184B2

公开(公告)日：2019-10-08

申请号：US15017699

申请日：2016-02-08

Applicant: Danfoss A/S

Inventor： Sveinn Porarinsson

IPC: F04B1/20

Abstract: A hydraulic device 1 comprises a first member 2 movable relative to a second member 5. In such a device the risk of cavitation noise and cavitation damage should be minimized. To this end said first member 2 having a pressure chamber 3 opening in a face 7 of said first member 2 which face 7 is in contact with a contact face 6 of said second member 5, said second member 5 having a low pressure area 9, wherein a throttling flow path is provided in a groove 11 connecting said pressure chamber 3 and said low pressure area 9 when pressure chamber 3 is approaching said low pressure area 9, characterized in that a throttling resistance of said groove 11 increases in a direction of the flow through said groove 11.