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    Pressure exchanger
    1.
    发明申请
    Pressure exchanger 有权

    公开(公告)号：US20230043692A1

    公开(公告)日：2023-02-09

    申请号：US17878991

    申请日：2022-08-02

    Applicant: Danfoss A/S

    Inventor： Stig Kildegaard Andersen ,  Poul Erik Hansen ,  Georg Herborg Enevoldsen ,  Kevin Evald

    IPC: F04F13/00

    Abstract: A pressure exchanger with a valve system includes a cylinder barrel (1), two valve plates (2) and two port plates (3, 4), wherein the cylinder barrel (1) has at least one cylinder (7) which accommodates a piston (8). The objective is to provide a pressure exchanger with low wear and a low maintenance effort. This objective is solved by a pressure exchanger including a piston (8) braking system and that the piston (8) includes a pressure relief arrangement.

    METHOD FOR PRODUCING A WATER-HYDRAULIC MACHINE
    2.
    发明申请
    METHOD FOR PRODUCING A WATER-HYDRAULIC MACHINE 有权

    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.

    Pump device
    4.
    发明授权
    Pump device 有权

    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).

    AXIAL PISTON MACHINE
    5.
    发明申请
    AXIAL PISTON MACHINE 有权
    轴向活塞机

    公开(公告)号：US20160130944A1

    公开(公告)日：2016-05-12

    申请号：US14930747

    申请日：2015-11-03

    Applicant: Danfoss A/S

    Inventor： Frank Holm Iversen ,  Stig Kildegaard Andersen

    IPC: F01B3/00

    CPC classification number: F01B3/0023 ,  F04B1/2092

    Abstract: An axial piston machine (1) is shown, comprising: a shaft (2) having an axis (3) of rotation, a cylinder drum (4) connected to said shaft (2) and having at least a cylinder (5) parallel to said axis (3) of rotation, a piston (6) movable in said cylinder (5), a swash plate (13), a slide shoe (11) pivotally mounted to said piston (6), and holding means holding said slide shoe (11) against said swash plate (13), said holding means having a pressure plate (14) and a number of coil springs (15) arranged between said cylinder drum (4) and said pressure plate (14). The object is to have a reliable operation of said machine with a simple construction. To this end each coil spring (15) is at least at one end fixed by a protrusion (20) extending into said coil spring (15).

    Abstract translation: 一种轴向活塞机（1），其包括：具有旋转轴线（3）的轴（2），连接到所述轴（2）的气缸滚筒（4），并且至少具有与 所述旋转轴线（3），可在所述气缸（5）中移动的活塞（6），旋转斜盘（13），可枢转地安装到所述活塞（6）的滑动板（11） （11）抵靠所述斜盘（13），所述保持装置具有压力板（14）和布置在所述气缸滚筒（4）和所述压板（14）之间的多个螺旋弹簧（15）。 目的是以简单的结构对所述机器进行可靠的操作。 为此，每个螺旋弹簧（15）至少在由延伸到所述螺旋弹簧（15）中的突起（20）固定的一端。

    HYDRAULIC AXIAL PISTON MACHINE
    7.
    发明申请
    HYDRAULIC AXIAL PISTON MACHINE 有权

    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).

    Hydraulic machine
    8.
    发明授权
    Hydraulic machine 有权

    公开(公告)号：US10385887B2

    公开(公告)日：2019-08-20

    申请号：US15017713

    申请日：2016-02-08

    Applicant: Danfoss A/S

    Inventor： Stig Kildegaard Andersen ,  Henry Madsen Møller ,  Palle Olsen ,  Poul Erik Hansen

    IPC: F15B15/14 ,  F04B1/10 ,  F04B1/20

    Abstract: A hydraulic machine is provided comprising a cylinder unit (3) having a plurality of cylinders (4a, 4b) which are located on a circle line around an axis of rotation of said cylinder unit (3), a valve plate (6) located at an axial end of said cylinder unit (3) and having a through-going opening (8) for each cylinder (4a, 4b), and a port plate, said valve plate (6) and said port plate resting against each other in sliding contact at a contact face, wherein a pressure in each cylinder (4a, 4b) acts on a pressure area on a side of said valve plate (6) opposite said port plate. In such a hydraulic machine the risk of leaking should be kept small. To this end said pressure area (17) deviates from a circular form.

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