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DE-102024133006-A1 - Drive housing platform for a wet or dry running drive of a coolant pump, in particular a coolant pump for use in an immersion cooling circuit

DE102024133006A1DE 102024133006 A1DE102024133006 A1DE 102024133006A1DE-102024133006-A1

Abstract

The invention relates to a drive housing platform for an electric motor drive with a drive housing (2) with at least - an interior (3) - a bearing seat (4) - a stator recording chamber (8) - a pump-side bottom wall (10) - a first flange device (11) on the bottom wall side, an axially opposite second flange device (12) and a closure cover (14) wherein the closure cover (14) carries an electronic module (18) with electrical connector elements (20) on an inner side (17) of the cover, wherein all relative mounting directions (M1-M6) insofar as they take place between the above components are aligned at least parallel to an axis of rotation (R) of the rotor (9).

Inventors

  • Conrad Nickel
  • Luis Herrling
  • Heidemarie Weinert

Assignees

  • NIDEC GPM GMBH

Dates

Publication Date
20260513
Application Date
20241112

Claims (15)

  1. Drive housing platform for a wet or dry running electric motor drive of a coolant pump (1), in particular a coolant pump for use in an immersion cooling circuit, comprising a drive housing (2) with at least: - an interior (3); - a bearing seat (4) for receiving a rotor bearing (5) of a rotor (6) of an electric motor (7); - a stator receiving chamber (8) for receiving a stator (9) of the electric motor (7); - a pump-side bottom wall (10) which forms a pump-side axial closure of the drive housing (2); - a bottom-wall-side first flange assembly (11) for connecting the drive housing (2) to a pump module (13); - an axially opposite second flange assembly (12) for connecting the drive housing (2) to a cover and to a cover (14) axially opposite the pump-side bottom wall (10), which has a receiving opening (15) for an electrical connection module (16), wherein the cover (14) has an inner surface (17) carries an electronic module (18) with electrical connector elements (20) designed to contact electrical terminals (21) of the stator (9), wherein all of the following relative mounting directions (M1-M6) are aligned at least parallel to an axis of rotation (R) of the rotor (6): a) the mounting direction (M1) of the rotor bearing (5) relative to the bearing seat (4); b) the mounting direction (M2) of the stator (9) relative to the drive housing (2); c) the mounting direction (M3) of the pump module (13) relative to the drive housing (2); d) the mounting direction (M4) of the cover (14) relative to the drive housing (2); e) the mounting direction (M5) of the electrical connection module (18) relative to the cover (14); f) the mounting direction (M6) of the plug connectors (20) relative to the electrical terminals (21) of the stator (9).
  2. drive housing platform according to Claim 1 , characterized in that the relative mounting directions (M1-M4) a) to d) are coaxial to the axis of rotation (R) and the mounting directions (M5, M6) e) and f) are radially offset to the axis of rotation (R).
  3. drive housing platform according to Claim 1 or 2 , characterized in that the drive housing (2) has a receiving space (26) for a shaft seal (25) to form a dry-running electric motor drive.
  4. Drive housing platform according to one of the preceding claims, characterized in that the first flange device (11) is designed to allow the pump module (13) to be positioned arbitrarily in a circumferential direction (U) relative to the drive housing (2).
  5. Drive housing platform according to one of the preceding claims, characterized in that the second flange device (12) is designed to allow the closure cover (14) to be positioned arbitrarily in the circumferential direction (U) relative to the drive housing (2).
  6. Drive housing platform according to one of the preceding claims, characterized in that the first flange device (11) and the second flange device (12) are designed as welding flanges suitable for continuous laser welding or suitable for continuous friction stir welding.
  7. Drive housing platform according to one of the preceding claims, characterized in that the electronic module (18) with the closure cover (14) and in particular the electronic module (18) with the closure cover (14) and the connection module (16) forms a pre-assembly assembly (19) of the electromechanical drive.
  8. Drive housing platform according to one of the preceding claims, characterized in that the drive housing (2) and the closure cover (14) are made of a metallic wrought alloy, in particular of an aluminium wrought alloy.
  9. Drive housing platform according to one of the preceding claims, characterized in that the connection module (16) is held in the receiving opening (15) of the closure cover (14) in a rotationally positive locking manner.
  10. Drive housing platform according to one of the preceding claims, characterized in that a stator receptacle (30) in the drive housing (2) is designed to allow the stator (9) to be positioned arbitrarily in the circumferential direction (U) relative to the drive housing (2).
  11. Drive housing platform according to one of the preceding claims, characterized in that the bottom wall (10) has flow openings (29) for a cooling fluid from the pump module (13), i.e. from a bottom wall-side, end-side external environment of the drive housing (2) into the interior (3) of the drive housing (2), wherein the flow openings (29) have a round cross-section or a cross-section deviating from the round cross-section.
  12. Drive housing platform according to one of the preceding claims, characterized in that all surfaces of a housing blank of the drive housing (2) that are to be machined for receiving components are cylinder inner surfaces, cylinder outer surfaces or annular surfaces.
  13. Drive housing platform according to one of the preceding claims, characterized in that the stator receiving space (8) in a drive housing (2) of the drive housing platform, which is designed to accommodate an electric motor (7) with higher power, extends further in the axial direction (A) towards the bottom wall (10) of the drive housing platform compared to a stator receiving space (8) in a drive housing (2) of the drive housing platform, which is designed to accommodate an electric motor (7) with lower power, and the bearing seat (4) of the rotor bearing (5) is arranged closer to the bottom wall (10) in the axial direction (A).
  14. Drive housing platform according to one of the preceding claims, characterized in that an axial distance (a) between a stator mounting (30) of the drive housing (2) for a higher-power electric motor (7) and a cover-side free end of the drive housing (2) is equal to the axial distance (a) between the stator mounting (30) of the drive housing (2) for a lower-power electric motor (7). Power to the free end of the drive housing on the lid side (2).
  15. Drive housing platform according to one of the preceding claims, characterized in that a blank of the drive housing (2), in particular a pressed blank of the drive housing (2) made of a metallic wrought alloy, is the same for both the use of an electric motor (7) with higher power and for the use of an electric motor (7) with lower power.

Description

Electric pumps are known in which the rotor is supported by two bearings at the end faces. This design requires considerable installation space. A centering tolerance between the housing and the motor cover with its bearing housing must be factored into the bearing clearances. This necessitates larger bearing clearances, which in turn tends to increase the risk of tilting. Furthermore, many complex individual parts are required for assembly. Flexibility regarding diverse customer requirements, particularly in the design of customer-specific interfaces, such as electrical or mechanical interfaces, is often lacking or only achievable with considerable effort. The object of the invention is therefore to provide a drive housing platform for a wet or dry running electric drive of a coolant pump, which is particularly suitable for a coolant pump for use in an immersion cooling circuit and is also simple and cost-effective in design and allows a large number of variants of the coolant pump to be realized with a single housing blank type. In particular, a wide variety of customer-specific electrical connection types and geometries should be possible. It is also desirable to be able to achieve reliable, process-safe electrical contact between an electronic module and a stator terminals using a so-called blind assembly method. Furthermore, it is desirable to be able to create pre-assembled modules that can be manufactured from component parts that are independent of their design. These tasks are solved with a drive housing platform having the features of claim 1. Advantageous embodiments relating to the dependent claims are specified. A drive housing platform according to the invention for a wet or dry running electric motor drive of a coolant pump, in particular a coolant pump for use in an immersion cooling circuit, has the following features: a drive housing with at least - an interior - a bearing seat for receiving a rotor bearing of an electric motor rotor - a stator mounting space for receiving a stator of the electric motor - a pump-side bottom wall, which forms a pump-side axial closure of the drive housing - a first flange device on the bottom wall side for connecting the drive housing to a pump module - an axially opposite second flange device for connecting the drive housing to a cover and a closure cover axially opposite the pump-side bottom wall, which has a receiving opening for an electrical connection module, wherein the closure cover carries on an inner surface an electronic module with electrical plug-in elements designed to contact electrical terminals of the stator, wherein all of the following relative mounting directions M1-M6 are aligned at least axially parallel to an axis of rotation of the rotor: a) the mounting direction M1 of the rotor bearing relative to the bearing seat; b) the mounting direction M2 of the stator relative to the drive housing; c) the mounting direction M3 of the pump module relative to the drive housing; d) the mounting direction M4 of the cover relative to the drive housing; e) the mounting direction M5 of the electrical connection module relative to the cover; f) the mounting direction M6 of the plug connector elements relative to the electrical terminals of the stator. With such a drive housing platform, it becomes possible to create a drive housing that can be easily manufactured from a single, standardized drive housing blank and enables the realization of a wide variety of coolant pump designs. Furthermore, it ensures the reliable and process-safe assembly of subassemblies, even using blind assembly. Blind assembly means that an assembly step, in particular, for example, the contacting of one assembly with another during an assembly step, is successfully completed reliably and process-safely, even if the specific contacting process is not visually observable from the outside, because the view of it is obscured at the time of contacting, i.e., during the production of the blind-assembled section. Furthermore, it is advantageous that, in a drive housing platform according to the invention, internal components of the drive housing can be designed as so-called carry-over parts across different versions. A uniform drive housing blank only requires different machining operations for the various applications, for example, of bearing seats and/or seating surfaces for a stator of an electric motor. In a suitable embodiment, the relative mounting directions M1-M4 a) to d) are arranged coaxially to the axis of rotation R and the mounting directions M5, M6 e) and f) are arranged radially offset to the axis of rotation R. This embodiment makes it possible to locally separate the electric motor-side connections from the input-side connections of the electronic module and, moreover, to arrange them as far apart as possible if required. In the case of a so-called dry-running drive, the drive housing is equipped with a receiving space for a shaft seal to create a dry-running electr