Abstract: A pump includes a housing having an inlet and an outlet configured to convey fluid, an impeller configured to convey the fluid from the inlet to the outlet, the impeller being arranged on a rotatable shaft, and a balance drum configured to relieve axial thrust. The balance drum includes a rotor rotationally fixedly connected to the shaft, the rotor having a high and low pressure sides, a stator stationary with respect to the housing, a relief passage extending between the rotor and the stator from the high pressure side up to the low pressure side of the rotor, a return passage connecting the low pressure side of the rotor to the inlet. An intermediate passage opens into the relief passage between the high pressure side and the low pressure side of the rotor. A blocking member is configured to influence the flow through the intermediate passage.

Abstract: A pump casing for a centrifugal pump has a first housing part, a second housing part sealingly attached to the first housing part, a plurality of securing elements for linking the first and the second housing part, and a radial sealing element for sealing between the first and the second housing parts, the first housing part has a first axial end surface, and the second housing part has a second axial end surface, the first and second axial end surfaces facing each other, and the first axial end surface includes an annular protrusion extending in the axial direction and the second axial end surface includes an annular recess configured for engaging with the annular protrusion, the annular protrusion arranged radially inwardly with respect to the securing elements.

Abstract: Disclosed is a pump having a pump rotor rotatably supported about an axis of rotation in a pump stator. In this respect, the pump rotor is designed and is arranged above a rotor shaft in a shaft bearing such that a lubricating film of a lubricating fluid formed from the pump fluid can be formed in a lubricating ring gap between the rotor shaft and the shaft bearing. In accordance with the invention, a separation device is provided at the rotor shaft by which a predefinable quantity of the ingredient can be separated from the pump fluid by means of a centrifugal force in the operating state for providing the lubricating fluid.

Abstract: An axially split pump for conveying a fluid includes an axially split housing with a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface. The bottom part and the cover are fastened to one another so that the two sealing surfaces are in direct contact with one another. At least one first sealing groove for the reception of a first sealing element is disposed in the sealing surfaces. A second sealing groove is disposed for the reception of a second sealing element. The first sealing groove and the second sealing groove are connected to one another through a connection region and an elastic pre-loading element is disposed in the connection region, which exerts a pre-load onto one of the two sealing elements.

Abstract: An axially split pump for conveying a fluid has an axially split housing that includes a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface, the bottom part and the cover being fastened so that the two sealing surfaces have direct contact. A first sealing groove for the reception of a first string-like sealing element is in the sealing surfaces, and a second sealing groove is provided for the reception of a second string-like element, the second sealing groove being connected to the first sealing groove via an opening. A connection element is in the opening that has two lateral cut-outs respectively for the reception of a one of the string-like sealing elements. The cut-outs are arranged and configured so that the two string-like sealing elements run substantially in parallel in the region of the connection element.

Abstract: A centrifugal pump for conveying a fluid includes a housing having an inlet and an outlet for the fluid. An impeller is arranged in the housing for rotation in an axial direction to convey the fluid from the inlet to the outlet, a shaft extends in the axial direction for driving the impeller, and a stationary guide device for guiding the fluid from the impeller to the outlet is connected to the housing. A resilient compensating element is disposed between the housing and the guide device, is arranged around the shaft, and holds the guide device in a centered position to the impeller during a radial relative movement to the housing.

Abstract: The invention relates to a sealing arrangement for a high-pressure space having a bounding element and a termination element. The bounding element has an outer sealing surface and the termination element has an inner sealing surface. The outer sealing surface and the inner sealing surface are arranged such that a sealing-off of the high-pressure space is achieved via a contact of the two sealing surfaces. In accordance with the invention the bounding element is designed such that a force in the direction of the inner sealing surface can act on the outer sealing surface due to a pressure in the high-pressure space. Thereby a sealing function is also achieved then when the termination element deforms due to the pressure in the high-pressure space. The sealing arrangement in accordance with the invention can be used particularly advantageously in pumps.

Abstract: A sealing arrangement for sealing a pressure chamber in a high pressure pump which is bound by a first and a second bounding element, includes a separate sealing element which has a first sealing surface for co-operating with the first bounding element, as well as having a second sealing surface for cooperating with the second bounding element. The two sealing surfaces are inclined with respect to one another and each have a groove for receiving a sealing ring. The sealing element is arranged in such a way that it can be displaced totally along one of the bounding elements on the application of pressure.

Abstract: A pump including an outer housing having an outlet chamber with an outlet connector, and including a first part pump and a second part pump connected thereafter, with the first and second part pumps being arranged in the outer housing, a separating element which can be arranged between the first and second part pumps and a rotor shaft which is rotatably arranged in the first and second part pumps. In accordance with the invention, the outer housing, the first part pump and the separating element bound a first pressure chamber and the outer housing, the second part pump and the separating element bound a second pressure chamber and the first and second pressure chambers are designed and arranged such that the outlet chamber is formed as a single high-pressure region of the pump.

Abstract: A pump for conveying a pump fluid, wherein the pump fluid provided at an inlet pressure at a low pressure side of the pump can be conveyed in the operating state to a high pressure side of the pump rotor by means of a pump rotor rotatably supported about an axis of rotation in a pump stator and wherein a rotor shaft is arranged with the pump rotor at it drive bearing formed as a shaft bearing, characterized in that a lubricating film which is formed from a lubricating fluid formed from the pump fluid can be formed on a drive side of the rotor shaft between the rotor shaft and a drive bearing in a lubricating ring gap, with a lubricant line being provided such that the lubricating fluid can be supplied to the lubricating ring gap between the rotor shaft and the drive bearing.

Abstract: A pump includes a housing having an inlet and an outlet configured to convey fluid, an impeller configured to convey the fluid from the inlet to the outlet, the impeller being arranged on a rotatable shaft, and a balance drum configured to relieve axial thrust. The balance drum includes a rotor rotationally fixedly connected to the shaft, the rotor having a high and low pressure sides, a stator stationary with respect to the housing, a relief passage extending between the rotor and the stator from the high pressure side up to the low pressure side of the rotor, a return passage connecting the low pressure side of the rotor to the inlet. An intermediate passage opens into the relief passage between the high pressure side and the low pressure side of the rotor. A blocking member is configured to influence the flow through the intermediate passage.

Abstract: An axially split pump for conveying a fluid has an axially split housing that includes a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface, the bottom part and the cover being fastened so that the two sealing surfaces have direct contact. A first sealing groove for the reception of a first string-like sealing element is in the sealing surfaces, and a second sealing groove is provided for the reception of a second string-like element, the second sealing groove being connected to the first sealing groove via an opening. A connection element is in the opening that has two lateral cut-outs respectively for the reception of a one of the string-like sealing elements. The cut-outs are arranged and configured so that the two string-like sealing elements run substantially in parallel in the region of the connection element.

Abstract: An axially split pump for a fluid includes an axially split housing with a bottom and a cover, a rotatable shaft, and a side cover. The side cover has a first surface for cooperating with a second surface. The second surface extends over the bottom and the cover. The bottom has a first sealing surface and the cover has a second sealing surface. The bottom and the cover can be fastened so that the sealing surfaces are in direct contact. One sealing groove is in one of the sealing surfaces for the reception of a string-like sealing element, the sealing groove extending up to the second surface. A recess surrounding the shaft is in the second surface and a projection surrounding the shaft is in the first surface. The recess and the projection are arranged so that they form a ring-like groove for the reception of a ring-like sealing element.

Abstract: An axially split pump for conveying a fluid includes an axially split housing with a bottom part and a cover. The bottom part has a first sealing surface and the cover has a second sealing surface. The bottom part and the cover are fastened to one another so that the two sealing surfaces are in direct contact with one another. At least one first sealing groove for the reception of a first sealing element is disposed in the sealing surfaces. A second sealing groove is disposed for the reception of a second sealing element. The first sealing groove and the second sealing groove are connected to one another through a connection region and an elastic pre-loading element is disposed in the connection region, which exerts a pre-load onto one of the two sealing elements.

Abstract: A sealing arrangement for placement between two components which have a planar contact surface, in particular two housing parts of a pump. The sealing arrangement has an elongate, flexible sealing element whose end region has a termination element thereon, which can carry out a sealing function. The sealing element and the termination element have an overlap region in the end region of the sealing element and thus form a first continuous sealing edge. The sealing edge is maintained also for a displacement of the end region of the sealing element in the direction of the start region within the overlap region. The termination element moreover has a first curvature. The curvature and the sealing element are configured so that the sealing element contacts the termination element along the curvature in a pressure-free state.

Abstract: The invention relates to a helico-axial pump (1) for pumping a multi-phase mixture (M), said helico-axial pump (1) including a rotor (2) rotatably journalled in a pump housing (6) about a longitudinal axis (A), wherein the rotor (2) includes a compression stage (K) with a helico-axial impeller (3) and a stator (4) for the compression of the multi-phase mixture (M). In accordance with the invention a hydrodynamic stabilization element (7, 71, 72, 73) having a stabilization surface (700) is provided in the pump housing (6) and designed such that a stabilization gap (8) is formed upstream of the stabilization medium, so that in the operating state a hydrodynamic stabilization layer (S) can be formed from a stabilization medium in the stabilization gap (S). The invention further relates to a rotor (2) for a helico-axial pump (1), a method for the hydrodynamic journaling of a rotor (2) of a helico-axial pump (1) as well as to a hybrid pump with a rotor (2) for a helico-axial pump 1.

Abstract: Disclosed is a testing apparatus for an outer housing of a pump, wherein the testing apparatus includes a separation element; a first and a second closure element, wherein the first and second closure element respectively close an axial end of the outer housing in a sealing manner; a middle pressure line which is arranged in the first or the second closure element; and a bounding element, wherein the bounding element closes the outlet outside of the outer housing, and wherein a high pressure line is arranged in the bounding element. The separation element is configured and arranged in the outer housing such that the separation element bounds the outlet of the outer housing and the outer housing is divided into a first pressure region and a second pressure region, wherein the first pressure region and the second pressure region are configured as pressure regions independent from one another.

Abstract: The invention relates to a helico-axial pump (1) for conveying a multiphase mixture (M), which helico-axial pump (1) includes a rotor (2) rotatably journalled about a longitudinal axis (A) in a pump housing (6) and having a first part rotor (21) and a second part rotor (22), wherein the first part rotor (21) and the second part rotor (22) include a compression stage (K, K1E, K1A, K2E K2A) having a helico-axial impeller (3) and a stator (4) for the compression of the multiphase mixture (M). In accordance with the invention, a hydrodynamic stabilization bush (70) having a stabilization surface (700) is provided and formed between the first part rotor (21) and the second part rotor (22) such that a stabilization gap (8) is formed before the stabilization surface (700) so that a hydrodynamic stabilization layer (S) is formed from a stabilization medium (M) in the stabilization gap (8) in the operating state.

Abstract: A pump including an outer housing having an outlet chamber with an outlet connector, and including a first part pump and a second part pump connected thereafter, with the first and second part pumps being arranged in the outer housing, a separating element which can be arranged between the first and second part pumps and a rotor shaft which is rotatably arranged in the first and second part pumps. In accordance with the invention, the outer housing, the first part pump and the separating element bound a first pressure chamber and the outer housing, the second part pump and the separating element bound a second pressure chamber and the first and second pressure chambers are designed and arranged such that the outlet chamber is formed as a single high-pressure region of the pump.

Abstract: The invention relates to a sealing arrangement for a high-pressure space having a bounding element and a termination element. The bounding element has an outer sealing surface and the termination element has an inner sealing surface. The outer sealing surface and the inner sealing surface are arranged such that a sealing-off of the high-pressure space is achieved via a contact of the two sealing surfaces. In accordance with the invention the bounding element is designed such that a force in the direction of the inner sealing surface can act on the outer sealing surface due to a pressure in the high-pressure space. Thereby a sealing function is also achieved then when the termination element deforms due to the pressure in the high-pressure space. The sealing arrangement in accordance with the invention can be used particularly advantageously in pumps.