公开(公告)号：US11754059B2

公开(公告)日：2023-09-12

申请号：US17038818

申请日：2020-09-30

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Sveinn Porarinsson

IPC: F04B1/124 ,  F04B1/2078

CPC classification number: F04B1/124 ,  F04B1/2078

Abstract: A piston (1) of a hydraulic piston machine is described, the piston (1) having a hollow (2) surrounded by a wall (3) and an insert (4) arranged in the hollow (2). Such a piston is used to have a piston machine with high efficiency at low costs. To this end at least two pliable rings (12, 13) are arranged between the insert (4) and the wall (3).

公开(公告)号：US20210189878A1

公开(公告)日：2021-06-24

申请号：US17039110

申请日：2020-09-30

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen

IPC: F01B3/00 ,  F04B1/2021

Abstract: A hydraulic axial piston machine (1) is described, the machine comprising a housing, a cylinder block (2) rotatably mounted in the housing about an axis or rotation (7) and having at least one cylinder (3), and a valve arrangement (4) between the cylinder block (2) and the housing, the valve arrangement having a first part (4) rotating with the cylinder block (2) and a second part mounted stationary with respect to the housing. Such a machine should have a high efficiency. To this end the first part (4) comprises an elastically deformable spring section (9).

公开(公告)号：US20160377066A1

公开(公告)日：2016-12-29

申请号：US15183890

申请日：2016-06-16

Applicant: Danfoss A/S

Inventor： Welm Friedrichsen ,  Frank Holm Iversen ,  Stig Kildegaard Andersen

IPC: F04B1/20 ,  B29C45/14 ,  B29C45/00

CPC classification number: F04B1/2085 ,  B29C45/0013 ,  B29C45/14 ,  B29K2105/16 ,  B29K2509/02 ,  F04B1/20 ,  F04B1/2014 ,  F04B1/2028 ,  F04B1/2071 ,  F04B53/166 ,  F05C2203/08 ,  F05C2225/12 ,  F05C2253/12 ,  F05C2253/18 ,  F16C33/20 ,  F16C2206/40 ,  F16C2208/02 ,  F16C2240/48 ,  F16C2360/00 ,  F16C2360/42

Abstract: A water-hydraulic machine (1) is disclosed with at least two parts which are movable relative to one another, of which one has a surface composed of a plastic (5, 12, 13, 15, 19) with friction-reducing properties. With such a design the wear in case of a water-hydraulic machine should be kept low. To this end, the plastic (5, 12, 13, 15, 19) is formed as a polymer with ceramic filler.

Abstract translation: 公开了一种水力机械（1），其具有可相对于彼此移动的至少两个部分，其中一个具有由具有摩擦减小特性的塑料（5,12,13,15,19）组成的表面。 通过这样的设计，水压机器的磨损应保持较低。 为此，塑料（5,12,13,15,19）形成为具有陶瓷填料的聚合物。

公开(公告)号：US20230279947A1

公开(公告)日：2023-09-07

申请号：US18173132

申请日：2023-02-23

Applicant: Danfoss A/S

Inventor： Stig Kildegaard Andersen ,  Frank Holm Iversen ,  Tommi Kolb

IPC: F16J1/04 ,  F16L27/04

CPC classification number: F16J1/04 ,  F16L27/04

Abstract: A piston (1) having a piston shaft (2), a ball head (3) at one end of the piston shaft (2), and a slider shoe (4) mounted to the ball head (3), wherein the ball head (3) has a through channel (5), the slider shoe (4) has a sliding surface (6) and a through hole (7) in communication with an end of the through channel (5), and a plastic material (8) is arranged in a gap between the slider shoe (4) and the ball head (3) and forms an inner coating (9) of the through hole (7). The production of such a piston should be facilitated. To this end a sealing surface (14) is arranged at the end of the through channel (5) wherein the sealing surface (14) surrounds the opening of the through channel (5) into the through bore (7) and an inner diameter of the sealing surface (14) is smaller than an inner diameter of the inner coating (9) of the through bore (7).

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：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：US20220186850A1

公开(公告)日：2022-06-16

申请号：US17547549

申请日：2021-12-10

Applicant: Danfoss A/S

Inventor： Frank Holm Iversen

IPC: F16K15/06

Abstract: A check-valve (1) including a housing (2, 3) having an inlet (5), an outlet (6), a fluid flow path between the inlet (5) and the outlet (6) and a valve seat (7) in the fluid path, the valve seat (7) having a valve seat axis (8), a valve element (9), a valve element support (12) arranged in the housing (2, 3) and supporting the valve element (9), is described, wherein the section (19) of the fluid flow path is formed between the housing (2, 3) and the valve element support (12) and the valve element (9) is moveable between a position in which it rests against the valve seat (7) and a position in which contacts against the valve element support (12). Such a check-valve should have a simple construction keeping low noise and wear. To this end, the valve element support (12) includes at least one recess (12) having an open side to the section (19) of the fluid flow path and connecting the section (19) of the fluid flow path to a space between the valve element (9) and the valve element support (12.)

公开(公告)号：US11067100B2

公开(公告)日：2021-07-20

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 ,  F03C1/34 ,  F04B53/06 ,  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：US20210088037A1

公开(公告)日：2021-03-25

申请号：US17030497

申请日：2020-09-24

Applicant: Danfoss A/S

Inventor： Georg Enevoldsen ,  Stig Kildegaard Andersen ,  Frank Holm Iversen

IPC: F04B27/08

Abstract: A method for producing a water-hydraulic machine having a first member (1) and a second member (2) in sliding contact with a contact surface (3) of the first member (1), wherein the second member (2) comprises a surface made of a friction reducing plastic material and the contact surface (3) is a metallic surface, is disclosed. The machine should have a low risk of damages. To this end, the method includes the steps of using a first member (1) comprising a first part (4) having the contact surface (3) and a second part (5), using a high temperature hardening process at a temperature of at least 1000° C. to give a deep surface hardening of the contact surface (3) of the first part (4), machining of the first part (4) to the desired geometry, assembling the first part (4) and the second part (5) to form the first member.

公开(公告)号：US10590920B2

公开(公告)日：2020-03-17

申请号：US14930738

申请日：2015-11-03

Applicant: Danfoss A/S

Inventor： Welm Friedrichsen ,  Lars Martensen ,  Frank Holm Iversen ,  Palle Olsen ,  Stig Kildegaard Andersen

IPC: F04B1/22 ,  F04B53/10 ,  F04B1/20 ,  F04B1/2021

Abstract: A pump device (1) is provided comprising: a shaft (2), rotor means (3a, 3b) fixed to said shaft (2) in rotational direction, said rotor means (3a, 3b) having pressure chambers (5a, 5b) the volume of which varying during a rotation of said rotor means (3a, 3b), port plate means (15a, 15b) having a through going opening (16a, 16b) for each of said pressure chambers (5a, 5b) and being connected to said rotor means (3a, 3b) in rotational direction, and valve plate means (17a, 17b) cooperating with said port plate means (15a, 15b). It is intended to pressurize a high volume of fluid, in particular water, within a limited space. To this end said rotor means (3a, 3b) comprise a first rotor (3a) and at least a second rotor (3b), both rotors being fixed to said shaft (2) in rotational direction, said first rotor (3a) having at least a first pressure chamber (5a) and said second rotor (3b) having at least a second pressure chamber (5b), said port plate means (15a, 15b) having a first port plate (15a) and at least a second port plate (15b), said first port plate (15a) having a through going opening (16a) for said first pressure chamber (5a) and being connected to said first rotor (3a) in rotational direction, said second port plate (15b) having a through going opening (16b) for said second pressure chamber (5b) and being connected to said second rotor (3b) in rotational direction, said valve plate means (17a, 17b) having a first valve plate (17a) and at least a second valve plate (17b), said first valve plate (17a) cooperating with said first port plate (15a), and said second valve plate (17b) cooperating with said second port plate (15b), wherein at least one of said first rotor (3a) and said second rotor (3b) comprises force generating means (19) pressing said second port plate (15b) against said second valve plate (17b) even in absence of hydraulic pressure in said second pressure chamber (5b).