Abstract:
A fluid pumping system comprises a fluid machine (14); a sensor (26) operatively coupled to the fluid machine, the sensor being configured to obtain at least one of vibration data or acoustic data from the fluid machine; and a controller (22) communicatively coupled to the sensor. The controller includes a logic configured: to obtain at least one of the vibration data or the acoustic data from the sensor; to produce a characteristic signature for the machine based on the vibration data or the acoustic data; to compare the characteristic signature to a plurality of baseline signatures stored in a library of baseline signatures, each baseline signature characteristic of a prescribed operating condition of the fluid machine; and to predict an operation state of the fluid machine based on the comparison. The corresponding method for predicting an operational status of a fluid machine is also disclosed.
Abstract:
The present invention relates to a system and to a method of controlling a fluid pump (10), as well as to a linear compressor and a cooler provided with means to calibrate the respective functioning at the time of the first use or in cases of problems caused by electric or mechanical failures. According to the teachings of the present invention, the fluid pump (10) is provided with a piston-position sensing assembly (11), the electronic controller (16) monitoring the piston displacement within the respective cylinder by detecting an impact signal. The impact signal is transmitted by the sensing assembly (11) upon occurrence of a impact of the piston with the stroke end, the electronic controller (16) successively incrementing the piston displacement stroke upon a trigger signal as far as the occurrence of the impact to store a maximum value of piston displacement.
Abstract:
A variable displacement electro-hydraulic pump is operated in a closed loop position control circuit. The adjusting pistons at the adjusting member of the pump are controlled for that purpose by a control valve (20) that in turn is driven by a control amplifier (28). The adjustment path of the control valve and the adjustment path of the adjusting member of the pump are supplied as real values to this control amplifier (28). In addition, an adjusting signal that depends on the angle of rotation of the pump is generated at the control amplifier. This additional pulse-shaped adjusting signal allows the oscillating effects of the driving unit forces on the hydraulic fixation, as well as the resulting noises to be compensated.
Abstract:
In a process for checking the function or operatability of a device or of an installation, in particular of a controlled hydraulic brake system, or of components of such an installation, physical characteristics of a component in which stresses are set up during operation are measured in a first step. In a second step, the physical characteristics are represented by electrical quantities in an actual value diagram, which is evaluated in an electronic checking unit in a third step. In one variant of the process, intended in particular for controlled hydraulic brake systems, brake operating data and wheel data are determined by suitable measuring techniques during braking, and a checking unit verifies whether the wheel data represent a correlation with the brake operating data which complies with the regulations. To check a hydraulic installation with components which produce volume or pressure pulses, for example pumps, data concerning the generators of volume or pressure pulses are obtained either continuously or by spot checks and evaluated as an index of the proper functioning of the installation.
Abstract:
The invention relates to a method for controlling knocking in a piston compressor (1) and to a piston compressor (1) that is designed to carry out the method according to the invention. The method according to the invention is characterized in that, if a knocking noise (100) made by a piston (10) of the piston compressor (1) hitting a cylinder head (12) is detected by means of a structure-borne noise sensor (2) provided on the piston compressor (1), the piston stroke (16) of the piston compressor (1) is decreased or, if no knocking noise (100) is detected over a predefinable period of time, the piston stroke (16) is increased.
Abstract:
A compressor mounted on a vehicle-side mounting section by using through bolts. The area of a first mounting surface of the compressor at which the compressor is mounted on the vehicle-side mounting section is set greater than the area of a second mounting surface where a seat surface for a head of each through bolt is formed. Because both the mounting surfaces have different areas, vibration is suppressed when the compressor is mounted in place. Thus, the simple improvement can effectively reduce vibration when the compressor is mounted on the vehicle-side mounting section using through bolts.
Abstract:
Die Erfindung betrifft eine Axialkolbenmaschine (1) mit in Zylinderbohrungen (8) innerhalb eines Gehäuses (3) rotierbaren Zylinderkörpers (7) angeordneten Kolben (9), wobei der Zylinderkörper (7) sich an einer Steuerplatte (13) abstützend angeordnet ist. Erfindungsgemäß ist vorgesehen, dass zur Reduzierung der Körperschallausbreitung von dem Zylinderkörper (7) über die Steuerplatte (13) an das Gehäuse (3) mindestens eine Elastomerschicht (23, 24, 28) vorgesehen ist.
Abstract:
The present invention relates to a system and to a method of controlling a fluid pump (10), as well as to a linear compressor and a cooler provided with means to calibrate the respective functioning at the time of the first use or in cases of problems caused by electric or mechanical failures. According to the teachings of the present invention, the fluid pump (10) is provided with a piston-position sensing assembly (11), the electronic controller (16) monitoring the piston displacement within the respective cylinder by detecting an impact signal. The impact signal is transmitted by the sensing assembly (11) upon occurrence of a impact of the piston with the stroke end, the electronic controller (16) successively incrementing the piston displacement stroke upon a trigger signal as far as the occurrence of the impact to store a maximum value of piston displacement.