Abstract:
An impeller is provided for a pump unit, in particular for a waste water pump unit, having two cover plates (2, 4), which are spaced apart from one another in the axial direction (X) and are connected to one another by at least one connecting element (8). The impeller has at least one blade (12, 14) which is arranged between the two cover plates (2, 4) and extends from an inner diameter of the impeller to an outer diameter of the impeller. The blade (12, 14) has a continuous slot (16), which extends from the edge (22, 24) of the blade (12, 14) which is situated at the inner diameter to the edge (26, 28) of the blade (12, 14) which is situated at the outer diameter. A pump unit is also provided having an impeller of this type.
Abstract:
A bore-hole pump has an electrical drive motor (3) and a multi-stage centrifugal pump (4) which is driven thereby. A sensor housing (9) is arranged at the end of the pump, in which one or more sensors are arranged, and which is surrounded by fluid and through which fluid flows (FIG. 1).
Abstract:
A pump assembly with an electric drive motor is provided in which the rotor (10) is designed as a permanent magnet rotor. The rotor (10), at least in a part region of its axial extension (X), is formed as shaftless and made completely of a magnetizable material, and the magnet poles of the rotor (10) are formed by magnetization of the magnetizable material.
Abstract:
A heat exchanger unit is utilized for heating service water in a heating installation. The unit includes a plate heat exchanger a first connector, attached to a first fluid connection point of the heat exchanger, and a second connector, fastened to the heat exchanger. The first and second connectors each include at least one base element. The base element of the first connector and the base element of the second connector have an identical configuration. Each base element includes at least two distinct flow ducts.
Abstract:
An electric motor includes a housing and at least one heat pipe for dissipating heat is integrated in the housing. Substantially all functional elements of the motor are disposed in the housing.
Abstract:
A method for data transmission between a pump assembly (2) and a control device (8) is provided, wherein the pump assembly (2) for the energy supply is connected via at least one electrical supply lead (10) to a frequency converter (14). The data transmission is effected via the electrical supply lead (10), and an evaluation of a data transmission signal (34) received by the pump assembly (2) or the control device (8) is only effected in low-disturbance regions of a carrier signal (22) formed by a supply current. A pump system designed for carrying out this method is also provided.
Abstract:
A heat circulation pump includes a pump housing (1) with a pump impeller arranged therein which is driven by an electric motor arranged in a motor housing (8) which axially connects to the pump housing (1). The heat circulation pump also includes a terminal box (12) which is axially connected to the motor housing (8) in order to receive electric and/or electronic components of the engine control. A plug or socket (34) of an electric plug connection is arranged on the outside of the terminal box (12) for the electric connection. The plug or socket (34) is/are axially offset with respect to the terminal box (12) and is/are arranged adjacent to the motor housing (8).
Abstract:
A system and a method for controlling the pressure of a fluid in a distribution network. The network includes at least one pump station having a number of pumps that are configured to pressurize the fluid from a supply line; means for determining at least one flow value (Q) of at least a part of the distribution network and a control unit for controlling the activity and/or speed of the pump(s) of the pump station according to a predefined pump curve defining the relationship between the pressure and the flow of the fluid pressurized by the pump station. The control unit is configured to change the pump curve automatically according to at least one determined flow value (Q).
Abstract:
A method for determining the functional relationship of several pumps which are controllable in their rotational speed, in a hydraulic installation. At least one pump is activated with a changed rotational speed, and at least one functional relationship of the installation is determined from the hydraulic reactions. With a suitable selection of the control and detection of the hydraulic changes, one may determine the functional relationship of the complete installation.
Abstract:
A metering pump unit with a metering chamber (6), a positive-displacement body that adjoins the latter and can be moved by a positive-displacement drive (22), as well as a controller (30) for actuating the positive-displacement drive (22). The controller (30) is designed to actuate the positive-displacement drive (22) at least in a specific operating state in such a way that a stroke, in particular a pressure stroke, of the positive-displacement body is started at a first, lower stroke rate, and the stroke rate is increased to a second, elevated stroke rate as the pressure stroke (36) continues. A method is provided for controlling the positive-displacement drive (22) of such a metering pump unit.