Danfoss A/s

Erik Haugaard

Palle Olsen

Poul Erik Hansen

Stig Kildegaard Andersen

Hans Christian Petersen

Lars Martensen

Welm Friedrichsen

Ove Thorboel Hansen

Lasse Nicolai Langmaack

Siegfried Zenker

Carsten Christensen

Verner Smidt

Richard Thomas Entwistle

Erik Plauborg

Ove Thorbøl Hansen

A hydraulic machine is described having a first part () and a second part () moveable relative to said first part (), one of said first part () and said second part () having a first land () resting against the other one of said second part () and said first part (), having a predetermined first height (H), and being arranged between a high pressure area () and a low pressure area (). Such a machine should have a long working life. To this end a second land () having a predetermined second height (H) smaller than said first height (H) is located adjacent to said first land ().

Hydraulic machine

A vane cell machine is provided comprising a housing having a stator bore with an outer limitation formed by a circumferential wall and two axial end faces (), a rotor mounted rotatably in said stator bore, a plurality of vanes moveable in radial direction relative to said rotor and sliding along said circumferential wall, and sealing means () at least at one of said end faces (), said sealing means () acting on said rotor in axial direction. Such a vane cell machine should have a simple construction. To this end said end face () is formed at an end plate () of said housing wherein said end plate () comprises a recess in which said sealing means () are rotated.

Vane cell machine

A vane cell machine () is described comprising a stator () and a rotor (), said rotor () having radially displaceable vanes () bearing on an inside () of the stator () and bordering, together with the rotor (), the stator (), and a side wall () at each axial end of the rotor (), work chambers () the volume of which changes during a rotation of said rotor, at least one side wall () bearing an insert in form of a ring (). Such a machine should be of simple construction. To this end, said ring () comprises a centric bore ().

Vane cell machine with centric bore in ring insert in side wall

A hydraulic machine arrangement () is described having a housing (), a working section and a hollow inside said housing (), a supply port arrangement LPin, HPin, LPout connected to said working area, and a leakage path () between said working section and said hollow. It should be possible to detect wear with simple means. To this end, said housing () is provided with a leakage port () connected to said hollow.

Hydraulic machine arrangement

A hydraulic arrangement () is provided comprising a pressure exchanger () having an axis () of rotation, and a booster pump (), said pressure exchanger () and said booster pump () being connected to each other. Such a hydraulic arrangement should have a good efficiency. To this end a single connection flange () is provided between said pressure exchanger () and the booster pump ().

Hydraulic arrangement

The invention specifies a hydraulic vane-type machine () having a stator () and having a rotor () which has multiple vanes (), each of which vanes is radially displaceable in a guide () in the rotor (), bears against an inner circumference () of the stator (), and, together with the rotor (), the stator () and in each case one side wall () at each axial end of the rotor (), delimits working chambers whose volumes vary in the event of a rotation of the rotor () relative to the stator (). It is sought to obtain a certain degree of freedom for the design of the inner circumference. For this purpose, it is provided that each vane () has, on its radially inner side, an abutment surface () which bears radially at the outside against a cam disk ().

Hydraulic vane-type machine

A vane pump () is disclosed comprising a housing () having a stator bore, a rotor () being rotatably mounted within said stator bore, and having a number of vanes () slidably mounted in said rotor () in radial direction of said rotor (), an inlet () and an outlet (). Such a vane pump should have a good efficiency. To this end said inlet () opens in an axial end wall of said stator bore () and said outlet () is connected to an outflow area formed in a circumferential wall () of said stator bore.

Vane pump

The invention concerns a reverse osmosis system () with at least one membrane unit () comprising an inlet (), a permeate outlet () and a concentrate outlet (), a high-pressure pump () that is connected to the inlet (), a pressure exchanger () comprising at least one high-pressure concentrate connection (HPC), and a booster pump. It is endeavored to achieve the lowest possible energy consumption. For this purpose, the booster pump is made as a displacement pump () that is arranged between the concentrate outlet () and the high-pressure concentrate connection (HPC) of the pressure exchanger ().

Reverse osmosis system

The invention concerns a reverse osmosis system () with a membrane unit () comprising an inlet (), a permeate outlet () and a concentrate outlet (), a high-pressure pump () that is connected to the inlet (), a pressure exchanger () connected on its concentrate side () to the concentrate outlet (), and a booster pump between the pressure exchanger () and the inlet (). It is endeavored to make the energy consumption as small as possible. For this purpose, the booster pump is made as a displacement pump.

Pump

The invention concerns a vane cell machine with a stator and a rotor having radially displaceable vanes arranged in guides, said vanes bearing on an inside of the stator and bordering, together with the rotor, the stator and a side wall, work chambers at each axial end of the rotor. It is endeavored to provide a vane cell machine that has a good internal tightness, in which the wear is still kept small. For this purpose, in a radially internal area the side wall comprises an insert that is axially movable in the side wall and has a pressure application surface axially inside and axially outside.

Vane cell machine having plates containing axial moving inserts bearing against the rotor

The invention concerns a vane cell machine having a stator and a rotor that is made of a first material, the rotor having guides comprising radially displaceable vanes that rest on an inside of the stator and border work chambers at each axial end of the rotor together with the rotor, the stator and individual stationary side walls, the vanes having, at least at some contact faces with the rotor and the stator, a second material that interacts unfrictionally with the first material. It is endeavoured to keep the wear small. For this purpose, in a radially inner area, the side wall comprises a surface of a third material interacting unfrictionally with the first material and, in a radially outer area a surface made of the first material.

The invention concerns a valve arrangement () comprising a flow path () connecting an inlet () and an outlet (), a closing means () arranged in said flow path (), a resetting means and a first pressure in a first pressure chamber () acting in a closing direction on said closing means (), a pressure of said outlet () and a second pressure in a second pressure chamber () corresponding to a pressure of said inlet () when said closing means () is closed acting in opening direction on said closing means (), said first pressure chamber () being connectable to the outlet () via an auxiliary valve (). It is intended to keep small a pressure pulse when opening the valve arrangement (). This is achieved in that the closing means () having a first opening state (A) and a second opening state (B), a flow resistance of said closing means () in said first opening state (A) being larger than a flow resistance of said closing means in said second opening state (B).

Valve arrangement

The invention concerns a valve arrangement () with a housing (), an inlet connection () and an outlet connection (), which are connected with each other via a flow path, in which is located a dosing device (), which has a valve seat () and a valve element () interacting with the valve seat (), the valve element () being loaded in the direction of the valve seat () by a resetting device () and being acted upon on the side facing the valve seat () by a pressure in a first pressure chamber (), said pressure corresponding to the pressure in the inlet connection (), when the dosing device () is dosed, and on the side facing away from the valve seat () by the pressure in a second pressure chamber (), which is connected with the outlet connection () via a channel arrangement (), in which is located at least one auxiliary valve (), and with the first pressure chamber () via a throttle (). It is endeavoured to reliably ensure that the closing device () opens. For this purpose, it is provided that the channel arrangement () ends in a suction nozzle arrangement (), which is located in the flow path.

The invention concerns a water-hydraulic machine with at least two mutually movable parts, of which one has a surface of a plastic material with friction-reducing properties. In such a machine it is desired to enable the use of demineralised water. For this purpose, it is ensured that a layer of a carbon-containing material is arranged between the plastics material and the other part.

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Graasten, Denmark

Erik Haugaard