A self adjusting gear pump (10) for an ice cream freezer and a control unit (20) for adaptively controlling the closing pressure (PCLOSE) of a pump for an ice cream freezer. The gear pump system comprises a pump casing (11), an inlet (12) for receiving a liquid food product of ice cream mix, an outlet (15) for transferring the ice cream mix into a freezing cylinder (41) of the ice cream freezer (40), wherein the pump (10) is closed by supplying a closing air pressure onto a moveable pump cover (16) of the pump via at least one hole (191, 192) provided straight through the pump casing (11), thereby moving said moveable pump cover (16) against the star wheel (14) and a control unit (20) for supplying a calculated closing air pressure (PCLOSE) to the pump by means of the air pressure regulator (100).

Embodiments of the invention are directed toward a novel pressurized vapor cycle for distilling liquids. In some embodiments of the invention, a liquid purification system is revealed, including the elements of an input for receiving untreated liquid, a vaporizer coupled to the input for transforming the liquid to vapor, a head chamber for collecting the vapor, a vapor pump with an internal drive shaft and an eccentric rotor with a rotatable housing for compressing vapor, and a condenser in communication with the vapor pump for transforming the compressed vapor into a distilled product. Other embodiments of the invention are directed toward heat management, and other process enhancements for making the system especially efficient.

An oil sensor comprising a holder to which an elongated crystal is fastened that is transparent to infrared light and with a refractive index greater than the refractive index of the oil to be examined, whereby a light source is provided in the holder at a first end of the elongated crystal for transmitting light in the infrared spectrum in the elongated crystal, and detector at a second end of the elongated crystal for measuring the intensity of the light, which during the passage through the elongated crystal undergoes total reflection at a boundary plane at least four times in succession in a contact zone where the elongated crystal comes into contact with the oil, wherein the oil sensor is further provided with at least one temperature sensor to determine the temperature of at least one of the components of the oil sensor.

An electric oil pump includes a pump part; a motor driving the pump part and having a rotor, a stator, and a motor shaft; a housing housing the motor; a control board including a drive circuit controlling driving of the motor; and a sensor board equipped with a rotation sensor detecting a rotation angle of the rotor of the motor. The motor shaft has one axial side connected to the pump part. The control board includes a sensor connection part performing electrical connection with the sensor board. The control board is arranged on a radially outer side with respect to the motor in a position of extending in an axial direction. The sensor board is arranged on the other axial side with respect to the motor shaft, and is arranged in a direction intersecting the axial direction.

A method for detecting an oil leakage of a main pump during a stopping process of an internal combustion engine, where the oil leakage is caused by a reversal of a direction of rotation of a crankshaft of a vehicle including an electric auxiliary pump and the main pump, where the main pump is driven by the internal combustion engine of the vehicle. The method includes determining whether a rotational speed of the electric auxiliary pump exceeds a predefined threshold value, and when the rotational speed of the electric auxiliary pump exceeds the predefined threshold value for the rotational speed, detecting that the main pump is leaking, recording an error in an error memory of the vehicle, and demanding an engine start.

Embodiments of the invention are directed toward a novel pressurized vapor cycle for distilling liquids. In some embodiments of the invention, a liquid purification system is revealed, including the elements of an input for receiving untreated liquid, a vaporizer coupled to the input for transforming the liquid to vapor, a head chamber for collecting the vapor, a vapor pump with an internal drive shaft and an eccentric rotor with a rotatable housing for compressing vapor, and a condenser in communication with the vapor pump for transforming the compressed vapor into a distilled product. Other embodiments of the invention are directed toward heat management, and other process enhancements for making the system especially efficient.

A system includes a refrigerant compressor, an electric motor and configured to drive the refrigerant compressor, and a controller. The controller is configured to operate the compressor in a liquid clearing start mode where electrical current through the motor is prevented from exceeding a predetermined current limit for a period of time not to exceed a predetermined period of time, and is configured to operate the compressor in a run mode in response to determining the motor exceeds a predetermined speed threshold at or before expiration of the predetermined period of time, wherein the run mode does not prevent electrical current through the motor from exceeding said predetermined current limit.

A method for selecting drilling parameters for drilling a borehole penetrating the earth with a drill string includes: varying a frequency of an excitation force applied to the drill string using an excitation device controlled by a drill string controller and measuring vibration-related amplitudes of the drill string due to the applied excitation force using a vibration sensor to provide amplitude measurements. The method further includes determining one or more modal properties comprising one or more eigenfrequencies of the drill string using the amplitude measurements and selecting drilling parameters that apply an excitation force at a frequency that avoids a selected range of frequencies that bound the one or more eigenfrequencies.

Systems, methods, and a computer readable medium are provided for automatically controlling a pump in an oil production environment. Sensor data can be collected from pump machinery and can be used to generate an advisory statement identifying a change in pump operation in regard to one or more operating conditions. The advisory plan can be used to determine an optimization action plan to maintain the operation of the pump machinery with respect to the operating conditions. The optimization action plan can include an action, a parameter, and a parameter variable and can be transmitted to a computing device configured within a supervisory control and data acquisition system and coupled to the pump machinery. The computing device can execute the optimization action plan to control the pump machinery with respect to the operating conditions.

A light load abnormality determination method for an electric oil pump (3) that circulates oil to an object to be cooled by the electric oil pump driven by a motor (11), the method comprising: a detection step (41) to detect a current flowing through the motor, a voltage supplied to the motor, and a rotation speed of the motor; a calculation step (42) to calculate a piping resistance equivalent value or a reciprocal value of the piping resistance equivalent value, as a load evaluation value for light load abnormality determination, based on the current, the voltage and the rotation speed detected by the detection step; and a light load abnormality determination step (44) to determine a light load abnormality of the electric oil pump based on the load evaluation value.