Pump for conveying liquid, having at least one pump housing with at least one inlet and at least one outlet, and including an inner circumferential surface and a geometric axis, where an eccentric is arranged within the pump housing and is moveable eccentrically relative to the pump housing around the geometric axis. A deformable element is arranged in a pump gap between the inner circumferential surface of the pump housing and an outer surface of the eccentric. The deformable element is pressed against the pump housing by the outer surface of the eccentric along at least one section of a conveying channel such that at least one displaceable seal of the conveying channel and at least one closed pump volume are formed in the conveying channel which are displaceable by an eccentric movement of the eccentric for conveying the fluid along the conveying channel from the inlet to the outlet.

A pump includes a pump housing, an inlet, an outlet, a rotatable eccentric, a deformable element between housing and eccentric and a delivery channel from inlet to outlet formed by the deformable element and the housing. The deformable element is pressed against the housing in sections by the eccentric forming a movable seal of the channel and a closed volume in the channel being movable along the channel from inlet to outlet to pump the liquid by rotating the eccentric. A method for operating the pump includes a) setting a liquid quantity to be pumped, b) determining a temperature of the deformable element, c) determining a parameter considering the temperature from step b), the parameter representing a dependence between movement of the eccentric and pump capacity and d) pumping the liquid quantity set in step a) by adapting an operating mode of the pump considering the parameter from step c).

A pump for conveying liquid includes a pump housing with an inlet and an outlet. An eccentric mounted at the housing rotates about an axis relative to the housing. A deformable element is disposed between the housing and the eccentric. A delivery duct from the inlet to the outlet is formed by the deformable element and a circumferential housing surface. The deformable element is pressed in sections against the housing by the eccentric to form a displaceable seal of the delivery duct and a closed pump volume in the delivery duct, which can be displaced along the delivery duct from the inlet to the outlet by a movement of the eccentric to convey liquid. A channel cross-section of the delivery duct is limited by the circumferential surface, a set-back duct surface of the deformable element and a contact seal between the circumferential surface and the deformable element.

A pump for conveying liquid includes a pump housing having an inlet, an outlet, an inner circumferential surface and a geometric axis. An eccentric in the housing is rotatable about the geometric axis relative to the housing. A deformable element is disposed between the inner circumferential housing surface and the eccentric. A delivery duct from the inlet to the outlet is formed by the deformable element and the inner circumferential housing surface. The deformable element is pressed against the housing by the eccentric in sections so that a displaceable seal of the duct and a closed pump volume in the duct are formed and are displaceable to convey the liquid along the duct from the inlet to the outlet by rotation of the eccentric. A receptacle, accommodating an edge region of the deformable element, is formed by the inner circumferential housing surface and a counter bracket.

The invention relates to a pump (2) intended to pump an additive in an SCR system for a vehicle. The pump is configured to rotate in a first direction of rotation in order to convey additive stored in a tank towards an injector via an injection channel. The pump includes a chamber (23) which houses a gear system (22). The chamber (23) is in fluid communication with the tank and the injection channel via an inlet channel (24) and an outlet channel (25) respectively. The pump is such that the inlet channel and the outlet channel are arranged so that after draining the injection channel, the chamber collects and retains the additive.

A fluid pump includes a gear housing with a pocket wall and a base. The pocket wall and the base define a pocket that projects into the gear housing from a pocket surface. The fluid pump also includes a first gear rotatably positioned in the pocket. The first gear is spaced from the pocket surface by a first gap. The fluid pump also includes a second gear rotatably positioned in the pocket that engages the first gear. The second gear is spaced from the pocket surface by a second gap. The fluid pump also includes a selected shim that is selected from a plurality of shims in a shim set. The selected shim has a thickness that results in a desired clearance between the selected shim and the first face or the second face.

A pump for delivering a fluid includes: a pump housing having an inlet and an outlet, and having an inner circumferential face; a drive shaft; an eccentric inside the pump housing, the eccentric being eccentrically movable relative to the pump housing; a deformable element arranged in a pump gap between the inner circumferential face and an outer surface of the eccentric, the deformable element and the inner circumferential face defining a delivery channel. The deformable element is forced against the pump housing by the outer surface of the eccentric along at least a portion of the delivery channel such to form a sliding sealing of the delivery channel that can be slid along the delivery channel from the inlet to the outlet to deliver fluid by movement of the eccentric. A reinforcing ring has a coefficient of thermal expansion smaller than a coefficient of thermal expansion of the pump housing.

The invention relates to a pump assembly, at least comprising a first housing, in which at least one first drive means for conveying a fluid is rotatably mounted, wherein a first drive shaft of the first drive means extends at least through a first side wall of the first housing in an axial direction; wherein, outside of the first housing, at least one first rotor of a first axial-flux electric drive is arranged on the first drive shaft, wherein the first axial-flux electric drive has only one stator.

A pump for conveying a fluid includes a pump housing with an inlet, an outlet, an inner circumferential surface and a geometric axis. An eccentric is rotatable in the housing around the geometric axis. A deformable element is disposed in a pump gap between inner and outer surfaces of the eccentric. A conveying channel is formed from inlet to outlet by the deformable element and the inner circumferential surface. The deformable element is pressed in sections against the housing by the outer eccentric surface, forming a displaceable seal of the channel and a closed pump volume in the channel being displaceable by rotation of the eccentric for conveying the fluid along the channel from inlet to outlet. The deformable element has a protrusion on one or both sides towards the geometric axis extending over the outer eccentric surface and contacting the deformable element. A centering ring is inside the protrusion.

A method for operating a device for dosed supply of a liquid, having a pump to deliver the liquid. The pump has an inlet and an outlet. An eccentric is arranged on the pump housing and a deformable diaphragm is arranged between a pump housing and the eccentric. The deformable diaphragm and the pump housing delimit a delivery path from the inlet to the outlet. The seal can be displaced along the delivery path by movement of the eccentric. A pressure sensor is connected to the outlet of the pump. A liquid is delivered by the pump. A time curve of the pressure at the outlet of the pump is monitored during delivery by the at least one pressure sensor. An angle position of the eccentric of the pump is detected using at least one characteristic feature of the time curve at the outlet.