Abstract

A device for sensing a rotary or linear position of moving parts of drives, in which a moving part performs a rotary movement or a linear positioning movement with respect to a stationary part, has a switch unit comprising switches arranged next to one another in a row and is arranged on the stationary part, and having an actuating element for actuating the switches based on the relative position of the moving part, the actuating element having switch triggers corresponding to the number of switches and each being assigned to the respective switches, such that there is a respectively defined unique combination of positions of the switches for each relative position between the moving part and the stationary part, and a control module having an analysis unit for storing coding for the different switch positions in relation to the relative position of the moving part of the drive.

IPC Classes  ?

• G01D 5/14 - Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage

Abstract

A device for detecting a rotation position of movable parts of drives is disclosed. A switching unit is arranged at the stationary part, and with an actuating member for direct or indirect actuation of the switches of the switching unit depending on the relative position of the movable part. The actuating member has a plurality of switch triggers corresponding to the number of the switches of the switching unit. A control module with an evaluation unit is provided, in which there is stored a coding of the different switch positions of the switches in relation to the relative position of the movable part of the drive, wherein the switches are switches with a simple switch function in the form of changeover switches or multiple switches, and wherein the actuating member is mechanically directly coupled with the movable part with regard to the travel movement of the drive.

IPC Classes  ?

• G01D 5/25 - Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts

Abstract

The invention relates to a device (10) for sensing a rotary position or linear position of moving parts of drives, in particular of hydraulic or electrohydraulic drives, which are functionally reliable under extreme ambient conditions such as in very low temperatures or where there is a risk of explosion, in which a moving part (1) performs a rotary movement or a linear positioning movement with respect to a stationary part (2), said device having a switch unit (3), which comprises a plurality of switches (31, 32, 33, 34, 35) arranged next to one another in a row, the switch unit (3) being arranged on the stationary part (2), and having an actuation element (4) for directly or indirectly actuating the switches (31-35) of the switch unit (3) in accordance with the relative position of the moving part (1), the actuation element (4) having a plurality of switch triggers (41, 42, 43, 44, 45) corresponding to the number of switches (31-35) of the switch unit (3), and the switch triggers (41-45) each being assigned to the respective switches (31-35), by being lined up and/or arranged between the moving part (1) and the stationary part (2), such that there is a respectively defined unique combination of switch positions of the switches (31-35) for each relative position between the moving part (1) and the stationary part (2), and a control module having an analysis unit is provided, in which coding for the different switch positions of the switches (31-35) in relation to the relative position of the moving part (1) of the drive is stored.

IPC Classes  ?

• G01D 5/25 - Selecting one or more conductors or channels from a plurality of conductors or channels, e.g. by closing contacts

Abstract

The invention relates to a method for controlling a hydraulically actuated drive unit (1-3), especially for a valve or control device, wherein at least on a part of the displacement of the drive unit the displacement speed (v′) is detected and compared with a predetermined target displacement speed (v), whereupon in the case of a difference between actual value (v′) and target value (v) of the speed, the controlling of the drive unit (1-3) is changed such that the displacement speed (v′) of the drive unit is adapted to the target value (v).

IPC Classes  ?

• F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
• F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line

Abstract

The invention relates to a method for controlling a hydraulically actuated drive unit (1-3) in particular for a valve, wherein the adjustment velocity (v1) is determined at least over part of the adjustment travel of the drive unit and is compared with a specified target adjustment velocity (v), whereupon, in the case of a difference between the actual value (v1) and the target value (v) of the velocity, the control of the drive unit (1-3) is changed in such a way that the adjustment velocity (v') of the drive unit is adjusted to the target value (v).

IPC Classes  ?

• F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
• F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line

Abstract

The invention relates to a method for controlling a hydraulically actuated drive unit (1-3) in particular for a valve, wherein the adjustment velocity (v1) is determined at least over part of the adjustment travel of the drive unit and is compared with a specified target adjustment velocity (v), whereupon, in the case of a difference between the actual value (v1) and the target value (v) of the velocity, the control of the drive unit (1-3) is changed in such a way that the adjustment velocity (v') of the drive unit is adjusted to the target value (v).

IPC Classes  ?

• F15B 11/042 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the feed line
• F15B 11/044 - Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member for controlling the speed by means in the return line

Abstract

n), the switch valves (7) are connected via a branch line (T1) to the return line (T) common to all armatures, and wherein at each switch valve (7) in the branch line (T1) to the return line (T), a preload pressure is maintained which is higher than the pressure in the common return line (T). Furthermore, a program is provided which processes the pulses of the throughflow sensor and carries out a learning cycle.

IPC Classes  ?

• F15B 11/12 - Servomotor systems without provision for follow-up action with only one servomotor with step-by-step action
• F15B 15/28 - Means for indicating the position, e.g. end of stroke
• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere
• F15B 21/02 - Servomotor systems with programme control derived from a store or timing device; Control devices therefor
• G01F 22/00 - Methods or apparatus for measuring volume of fluids or fluent solid material, not otherwise provided for
• F15B 21/04 - Special measures taken in connection with the properties of the fluid

Abstract

The invention relates to a method for displaying the position of a hydraulically actuated fitting, with a piston (121) in an actuating cylinder (1.2) for actuating the fitting (1.1), the piston being connected via two hydraulic lines (2, 3) to a changeover valve (7), by means of which the hydraulic lines can be switched between pressure-carrying feeding and de-pressurized return. The flow of the hydraulic fluid flowing through one of the hydraulic lines is converted into a plurality of electrical pulses, each of which corresponds to a predetermined volume unit of the hydraulic fluid. The changeover valve (7) is connected to supply lines (P, T) on which additional changeover valves for actuating additional fittings (In) are connected, and the changeover valves (7) are connected via a branch line (T1) to the common return line (T) provided for all fittings. A preload pressure higher than the pressure in the common return line (T) is maintained at each changeover valve (7) in the branch line (T1) to the return line (T). In addition, a program which processes the pulses from the flow sensor performs a learning cycle.

IPC Classes  ?

• F15B 15/28 - Means for indicating the position, e.g. end of stroke
• F15B 11/12 - Servomotor systems without provision for follow-up action with only one servomotor with step-by-step action
• F15B 19/00 - Testing fluid-pressure actuator systems or apparatus, so far as not provided for elsewhere

Abstract

The invention relates to a device for concentrating a liquid pumped by a differential piston pump through a concentrating apparatus, said liquid directly acting on the at least one differential piston in an assisting manner during the delivery stroke at a residual pressure as a concentrate, wherein the differential piston pump is designed as a radial piston pump and the differential pistons are driven by an eccentric disk on a drive shaft of the radial piston pump, which actuates a control valve device for feeding and removing the fluids, and wherein the control valve device is designed in the form of at least one rotating valve element (7b, 8b; 70b) that is connected to the drive shaft (2).

IPC Classes  ?

• F04B 5/02 - Machines or pumps with differential-surface pistons with double-acting pistons
• F04B 7/00 - Piston machines or pumps characterised by having positively-driven valving
• F04B 9/04 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
• F04B 5/00 - Machines or pumps with differential-surface pistons
• F04B 9/107 - Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting liquid motor, e.g. actuated in the other direction by gravity or a spring
• F04B 1/053 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
• F04B 1/047 - Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders

Abstract

The invention relates to a method for indicating the position of a hydraulically activated armature, comprising an actuating cylinder (1.2) for activating the armature (1.1), said actuating cylinder being connected by at least one pressure medium line (2, 3) to a control valve (4.1) by means of which the pressure medium line may be switched between a pressure-conducting forward flow and a pressure-free return flow, wherein the flow through the pressure medium line is converted into a number of electrical pulses and the number of pulses reflecting the flow is processed in a program of a display unit (6) such that the number of pulses occurring in the case of a predetermined control path with a pressure-free flow in the pressure medium line is calculated as the same control path when the pressure medium line is connected as a pressure line.

IPC Classes  ?

• F15B 15/28 - Means for indicating the position, e.g. end of stroke