DE102024119055A1 - Pump, in particular coolant pump, for pumping a cooling medium for a vehicle - Google Patents

Abstract

Pump (1), in particular coolant pump, for pumping a fluid for a vehicle, comprising:
- a pump chamber (2) in which at least one pump output means (3) is arranged for conveying a conveyed medium;
- an engine compartment (4) in which at least one electric motor (5) driving the pump output medium (3) is arranged, wherein
- the pump room (2) and the engine room (4) are fluidically connected.

Description

The invention relates to a pump, in particular a coolant pump, for pumping a fluid for a vehicle.

Such pumps, particularly coolant pumps, are known in principle from the prior art. It is known to provide a motor compartment on a pump, in which a drive motor is arranged. This drive motor powers a pump structure located in a pump chamber to set a fluid in motion or to convert the drive power of the drive motor into the kinetic energy of the fluid. Typically, the pump chamber is separated from the motor compartment so that a fluid pumped in the pump chamber cannot enter the motor compartment and come into contact with components of the drive motor there. In particular, there is no contact between a stator or a rotor of the drive motor, especially an electrically driven drive motor, and the fluid being pumped by the pump structure.

The invention aims to provide a pump that enables a compact pump design and/or a pump that can be manufactured simply and cost-effectively. Furthermore, the invention aims to provide a pump that exhibits high performance.

The problem is solved by a pump, in particular a coolant pump, for pumping a fluid for a vehicle according to claim 1. The dependent claims relate to possible embodiments of the pump. The problem is further solved by a method according to claim 16. The dependent claim 17 relates to a possible embodiment of the method.

The invention relates to a pump, in particular a coolant pump, for conveying a fluid for a vehicle, comprising a pump chamber in which at least one pump output element for conveying a fluid is arranged. The pump further comprises a motor chamber in which at least one electric motor or electric machine driving the pump output element is arranged. The invention is characterized in that the pump chamber and the motor chamber are fluidically connected. In other words, the fluid can move between the pump chamber and the motor chamber. Thus, the electric motor arranged in the motor chamber comes into contact with the fluid at least partially, preferably predominantly, and particularly preferably completely. The fluid can, for example, have a cooling and/or lubricating effect on the sections of the electric motor it acts upon. Accordingly, the electric motor can be operated in a higher power range, since it experiences effective cooling by the fluid. The fluid can, for example, be a non-conductive fluid, e.g., non-conductive oil. Because the pumped medium has no electrical conductivity, there is no risk of a short circuit from a pumped medium located in the engine compartment.

Electrical or electronic components integrated for the operation of the electric motor can be part of the pump or a pump assembly, or they can be connected to the electric motor as a separate electronic assembly via an electrical or electronic connection. For example, the electrical or electronic connection can be wireless (e.g., via radio link) or wired (e.g., via cables or conductors). A fluidic connection means that the two areas or spaces are fluidically connected, i.e., that a fluid can flow from one area or space to the other. Please do not include the electronics area in the claim or define it more generically: For example, the pump itself may not have power electronics and may instead be connected to a separate control unit that includes the power electronics. In other words, a central control unit and/or a control unit upstream of the pump can be used to provide control signals for the pump.

It is possible for the pump to have an electrical compartment in which at least one electrical and/or electronic component is located, the electrical compartment being fluid-tight and separated from the pump compartment and the motor compartment. This results in a pump design that provides for a pumped medium in the pump and motor compartments, but prevents the pumped medium from entering the electrical compartment. This protects the components located in the electrical compartment, particularly electrical or electronic components, from contact with the pumped medium. At least one electrical and/or electronic component located in the electrical compartment can, for example, be used to operate the electric motor. Such a component could, for example, include a memory module and/or a CPU and/or a radio module and/or a component of an electrical circuit. In particular, the at least one electrical or electronic component located in the electrical compartment and used to operate the electric motor can include a power converter, e.g., a rectifier. and/or an inverter and/or a converter and/or a DC/DC converter.

It is possible that a rotor and a stator of the electric motor are arranged and/or formed at least partially, preferably predominantly, and particularly preferably completely, within the motor compartment, wherein the rotor and/or the stator are fluidically connected to the pump compartment in such a way that a pumped medium conveyed in the pump compartment is in contact with the rotor and/or stator at least partially, or can be brought into contact with it. This allows the pumped medium entering the motor compartment to be used, through its direct contact with the rotor and/or stator, to cool the rotor or stator or to lubricate its surface, thus reducing effective cooling or the mechanical resistance to relative movement between the rotor and stator.

A partition can be arranged, for example, between the engine compartment and the electrical compartment, sealing them against liquids. The partition can be, for example, a component made of plastic. Preferably, the partition delimits the engine compartment and/or the electrical compartment, at least partially. The partition can have, for example, a flat or plate-like shape. For example, the partition can be disc-shaped in its basic form. The partition can be configured to transmit torques. The partition has a sealing function for sealing the engine compartment and the electrical compartment. This sealing function is thus fulfilled by a separate component, the partition, possibly together with a sealant, so that other components defining the engine compartment and/or the electrical compartment do not need to fulfill any, or only a minimal, sealing function for a, in particular direct, transfer of fluid between the engine compartment and the electrical compartment, and consequently can have low design requirements.

For example, a separating element can be arranged between the engine compartment and the environment. This separating element can be designed, for instance, as a wall element delimiting the engine compartment. Alternatively, the separating element can be designed as a cover to close an opening in a housing that at least partially delimits the engine compartment. As a cover, the separating element can form a removable or non-removable closure for the opening of the engine compartment and/or for the opening of the electrical compartment.

For example, the separating body is oriented in its main plane of extension perpendicular to an axis of rotation of the electric motor rotor. Optionally, the separating body has a disk-like basic shape, with its central longitudinal axis and/or central longitudinal plane oriented perpendicular to the axis of rotation of the electric motor rotor. The main plane of extension of the separating body can refer to its basic shape; for example, the separating body has a substantially flat or plate-like basic shape from which individual sections can rise, e.g., at least one support arm or support structure mentioned below.

In a preferred embodiment, the separating element may have at least one through-opening for the passage of an electrical conductor, wherein the electrical conductor forms an electrical connection between (a) at least one electrical and/or electronic component arranged in the electrical compartment or (b) between an electrical and/or electronic component arranged in the environment and the electric motor arranged in the motor compartment. The electrical compartment may, for example, be a component of the pump, i.e., for instance, that the walls defining the electrical compartment at least partially, preferably predominantly, and particularly preferably completely, are part of the pump. Alternatively or additionally, the separating element may be arranged between the motor compartment and the environment of the pump, thus sealing the environment and the motor compartment against each other in a gas- and/or liquid-tight manner. In this case, the separating element may also be understood as a cover which, for example, as a component of the pump housing, at least temporarily closes off and seals the motor compartment against the environment.

In the case of a separating element that encloses the engine compartment from the environment, the electrical conductor passing through or positioned in the separating element's at least one opening can serve as the electrical connection between the electric motor located in the engine compartment and at least one electrical and/or electronic component located in the environment (i.e., e.g., outside the pump). An opening is understood to be a recess in the separating element through which at least one electrical conductor passes. In particular, an electronic and/or electrical component located away from the pump or outside a pump assembly forming the pump can be electrically connected to the electric motor in the engine compartment by means of the electrical conductor. An electrical and/or electronic component of the electric motor comprises, for example, at least one of its windings and/or a sensor and/or an electrical resistor.

In an optional embodiment, a restoring force or preload force can act between the feedthrough opening and the electrical conductor during final assembly. For example, the electrical conductor may bend, at least partially, particularly during its insertion into the feedthrough opening. This bending stress on the electrical conductor can generate a restoring or preload force acting between the electrical conductor and the separating element or the feedthrough opening of the separating element. This creates a force-fit connection at a contact area between the electrical conductor and a wall of the separating element that defines the feedthrough opening. This force-fit connection can, for example, serve as a pre-fix during the application of a sealant between the electrical conductor and the separating element. Such a force-fit connection can also enhance the sealing function for the passage of a conveyed medium through the separating element.

It can also be optionally provided that at least one electrical conductor is at least partially secured in the feedthrough opening of the separating element by a form-fit and/or force-fit connection. In particular, such a fastening of the electrical conductor to the feedthrough opening can form a pre-fixation or a pre-seal, which is enhanced by the subsequent or simultaneous application or joining of the sealant. A friction-fit or force-fit connection can be created, for example, by the formation of frictional forces or a clamping force between the electrical conductor and the feedthrough opening during the joining of the electrical conductor and the feedthrough opening. For example, the electrical conductor has a raised engagement feature that engages in a corresponding recess on the feedthrough opening side, forming a form-fit connection. Alternatively or additionally, the electrical conductor can have a corresponding recess into which a raised engagement feature on the feedthrough opening side engages to form a form-fit connection. A structure of the electrical conductor that forms or supports a frictional, force-fit, and/or form-fit connection can be created, for example, during a punching and/or embossing process. For instance, during punching and/or embossing, the electrical conductor is modified to create a structure that enables or supports a subsequent force-fit and/or form-fit connection between the conductor and the feedthrough opening. This might involve embossing raised areas and/or indentations in the body forming the electrical conductor. In particular, embossing and/or punching can be performed in a sheet metal plane of an electrical conductor that is designed as or manufactured from a sheet metal part. Optionally, the electrical conductor can undergo a process that roughens the surface, for example, by grinding and/or laser-assisted surface treatment/processing.

The at least one electrical conductor can be sealed to the separating body, for example to a wall section of the separating body, by means of a sealant. The sealant can, for example, be made of rubber at least partially, preferably predominantly, and particularly preferably entirely. In particular, the sealant can be designed as an adhesion promoter or as a rubber gasket. The sealant can, for example, be attached to or mounted on the separating body as a molded gasket. For example, the sealant is designed as an O-ring seal. During the joining of the sealant and the separating body, a pressing force or a force that compresses the sealant at least partially can be applied, such that a sealing force or a preload results from a geometric deformation, in particular a geometric compression, of the sealant.

Alternatively or additionally, at least one sealant or component of a sealant measure can be arranged as a casting material on the separating body, or is arranged as a casting material on the separating body. In other words, the sealant is supplied, at least section by section, in liquid or paste form to the interface to be sealed between the separating body and the electrical conductor. Preferably, after supply, the sealant is actively (e.g., by applying heat) or passively cured.

The sealant can, for example, be formed or consist at least partially, preferably predominantly, and particularly preferably completely, of a thermosetting material (e.g., an epoxy) and/or thermoplastic material and/or of an elastomer (e.g., FPDM).

The separating element can, for example, have at least one receiving recess in the area of the feedthrough opening for an electrical conductor, for receiving at least one sealant. The receiving recess serves to introduce and/or fix and/or clamp a sealant. With In other words, the receiving recess can serve as a receiving space for the at least partial, and in particular predominantly, and especially completely, receiving of the sealant. The receiving recess can, for example, form a cavity into which a sealant, introduced as a liquid or paste-like casting material, is placed. For example, at least one wall of the receiving recess can serve as a shaping surface for a sealant, particularly in liquid or paste form, introduced into the receiving recess. It is possible that at least one overflow is formed, through which excess sealant introduced in liquid or paste form can escape in a predefined manner. Optionally, at least one connecting channel can be formed between several receiving recesses and/or cavities, thus facilitating the filling of the receiving recesses with sealant introduced in liquid and/or paste form. For example, sealant introduced into a first section of the receiving recess can pass through the connecting channel into a second section.

The receiving recess can be located, for example, on the side of the separating body facing away from the pump compartment or, if applicable, on the side facing the electrical compartment. Alternatively, the receiving recess can be located on the side facing the pump compartment and/or, if applicable, on the side of the separating body facing away from the electrical compartment. It is possible for a first receiving recess to be located on one side of the separating body and a second receiving recess to be located on a second side of the separating body, opposite the first. Alternatively or additionally, the first and second receiving recesses can be associated with the same feedthrough opening or the same electrical conductor. This allows at least one electrical conductor to have, for example, two sealing elements or two sealing sections along its longitudinal extent, which are located in receiving recesses.

It is possible for the receiving recess to have at least one guide ramp. This guide ramp is formed at an inlet opening of the receiving recess. The guide ramp is located on the side of the separating body facing away from the pump compartment and/or, if applicable, on the side facing the electrical compartment. Alternatively or additionally, at least one guide ramp may be located on the side facing the pump compartment and/or, if applicable, on the side of the separating body facing away from the electrical compartment. The guide ramp facilitates at least partial relative movement between the receiving recess and electrical conductors. Alternatively or additionally, at least one guide ramp on the separating body side may be used to guide a sealing compound to be inserted into the receiving recess.

For example, a defined (increased) roughness and/or a step can be arranged or formed on the surface of the separating element that defines or forms the feedthrough opening and/or on the surface of the electrical conductor associated with the feedthrough opening. This roughness-increasing measure can influence the flow behavior of the sealant, introduced in liquid or paste form into the separation gap between the electrical conductor and the feedthrough opening. In other words, by maintaining a defined rough surface on the electrical conductor and/or on the walls defining the feedthrough opening, reliable retention or continuous filling of the sealant introduced in liquid and/or paste form can be influenced, and in particular controlled. Generally, the design of the gaps and their surface can be adapted to the viscosity of the introduced sealant.

It is possible that the separating body has a retaining structure on its side facing the engine compartment for attaching at least one component of the electric motor's stator. The retaining structure may include a protrusion and/or a recess by means of which a component of the stator is directly fixed. For example, the retaining structure is or can be connected to the at least one component of the stator by means of a force-fit, a positive-fit, and/or a material-fit connection. Thus, the separating body fulfills, on the one hand, the function of separating the engine compartment from the environment or from the electrical compartment, and, on the other hand, sealing the passage of an electrical conductor, possibly by means of a sealant. Furthermore, it also provides a holding or support function for the stator, e.g., relative to a pump housing and/or other attached components.

The retaining structure can, for example, be an integral or material-seamless, i.e., one-piece, component of the separating body. For example, the separating body is manufactured using an injection molding process, wherein a geometry encompassing the retaining structure is produced at least partially, preferably predominantly, and particularly preferably completely, during the injection molding process. The retaining structure can, for example, include at least one The retaining arm has a length that is parallel to, or aligned with, an axis of rotation of the rotor held in the stator. Preferably, the retaining arm has a longitudinal axis that is parallel to, and in particular aligned with, the axis of rotation of the rotor held in the stator.

At least one component of the stator, in particular a stator comprising a laminated core of individual laminations, can be attached or attachable to the separating body, for example, by riveting, welding, clip connection (snap-fit connection), and/or riveting (i.e., creating a force-fit and form-fit connection between two individual workpieces by plastic deformation), especially hot riveting. The retaining structure has, for example, preferably at its free end, an engagement structure which engages with a receiving structure of at least one component of the stator. For example, a clip connection of the stator to the retaining structure of the separating body can be made.

It is possible that the holding structure has, for example, at least two, preferably at least three, and particularly preferably at least four, holding arms aligned parallel to or along the axis of rotation of the rotor. In this way, a preload force can be applied in the assembled state of at least one component of the stator and a holding structure of the separating body, in particular a holding arm. This means, for example, that a clamping force is present as at least one connecting component of a connection between the separating body and the stator. Preferably, the holding arms can be arranged equidistantly on a ring, in particular on an annular ring, and extend perpendicularly from this plane of the ring, in particular the annular ring.

The separating body can have a retaining structure on its side facing the motor compartment for attaching at least one component of an electric motor stator. The stator, or a component of the stator, can have a retaining element that is arranged on a side facing the electrical compartment and/or on a side facing away from the pump compartment of the stator, in particular of a lamination stack encompassing the stator, wherein the retaining element forms a force-fit, material-fit, and/or form-fit connection with the retaining structure. The retaining element can, for example, be made of plastic. Preferably, the retaining element is injection-molded onto the stator, or a component of the stator, using an injection molding process. Optionally, the retaining element can have an opening into which an engagement section of the retaining structure on the separating body side engages.

The separating body and/or at least one component of the stator can, for example, have a guide and/or centering structure on its side facing the engine compartment for at least partially guiding and/or centering at least one component of the electric motor's stator relative to the separating body during the joining of the two components or assemblies. Preferably, the guide and centering structure is arranged on or formed within the holding structure. During the joining of the separating body and the stator, a predefined centering and/or guidance of the relative movement can be achieved through direct, at least partial, contact. This allows, for example, a defined relative positioning of a component of the stator and the separating body. For instance, axial parallelism and/or coaxial alignment or a coaxial arrangement of bearing receptacles or bearing elements arranged in the bearing receptacles, which are located in the separating body and/or in a component of the stator, can be achieved.

Optionally, the separating element can be connected, particularly directly, to or joined with a housing body, wherein the electrical compartment and/or the motor compartment and/or the pump compartment are at least partially, preferably predominantly, and particularly preferably completely, surrounded by the housing body. For example, the separating element has a recess, particularly an annular groove, for receiving an edge section of the housing body. The housing body can, for example, have a central longitudinal axis which, in the final assembly state, is aligned coaxially with an axis of rotation of a rotor of the electric motor. In the final assembly state, an annular gap can be formed between the housing body and the laminated core of the electric motor, within which the retaining structure is arranged.

It is possible that the housing body is made at least partially, preferably predominantly, and particularly preferably entirely, of an electrically conductive material. For example, an electrically conductive plastic and/or a metal can be used as the material for the housing body. In particular, the material for the housing body can comprise or consist of an electrically conductive polyphenylene sulfide (PPS), at least partially.

Optionally, power electronics located in the electrical compartment can be cooled directly or indirectly by a first medium. For this purpose, the power electronics can be at least partially surrounded by the first medium. The rotor and/or stator or motor compartment can be cooled by a second medium, e.g. The system involves the direct or indirect circulation of fluid around at least one area and/or component of the engine compartment for cooling purposes. The first and second media are kept separate within the pump assembly, and the two media do not mix. This separation allows for targeted cooling of the electrical compartment and the engine compartment within the pump assembly. Specifically, the cooling demand of the electrical compartment can be precisely controlled or regulated by adjusting the flow rate of the fluid cooling it, without affecting the pump's delivery rate.

In a preferred embodiment, the pump described herein can be used in a cooling circuit of an electric vehicle. For example, the pump is used to circulate a cooling medium for, in particular, direct, battery cooling. Alternatively or additionally, the pump can be used in a cooling circuit of a fuel cell.

In addition to the pump, the invention relates to a method for manufacturing a pump described herein, wherein a pump housing defining a pump chamber and a motor housing defining a motor chamber for accommodating an electric motor are provided. Furthermore, an electric motor is arranged in the motor chamber such that the pump chamber and the motor chamber are fluidically connected. Because there is no sealing measure between the motor chamber and the pump chamber, a fluid pumped by the pump can enter the motor chamber and, in particular, come into contact with components of the rotor and/or stator.

In an optional embodiment of the method, a separating element with a feedthrough opening for an electrical conductor is arranged (a) between the engine compartment and an electrical compartment containing at least one electrical and/or electronic component, and/or (b) between the engine compartment and the environment, wherein the electrical compartment and/or the environment is fluid-tightly separated from the engine compartment by means of the separating element. The separating element thus serves as a sealing cap against an area located outside the pump, i.e., the environment, or against an electrical compartment provided by the pump. Despite the passage of the electrical conductor through the feedthrough opening of the separating element, a seal is maintained between the sections separated by the separating element (electrical compartment/engine compartment or environment/engine compartment); in particular, the pumped medium present in the engine compartment cannot enter the electrical compartment.

All advantages, details, designs and/or features of the pump according to the invention are transferable or applicable to the method according to the invention and vice versa.

• 1 eine schematische Vollschnittdarstellung einer Pumpe gemäß einem Ausführungsbeispiel;
• 2 eine schematische Detaildarstellung einer Durchtrittsöffnung eines Trennkörpers gemäß Detail A aus 1;
• 3 eine schematische Detaildarstellung einer Durchtrittsöffnung eines Trennkörpers zu einer im Vergleich zu der in 2 gezeigten alternativen Ausführungsform;
• 4 eine perspektivische Darstellung auf einen Trennkörper auf dessen, einem Elektroraum zugewandten Seite gemäß einem weiteren Ausführungsbeispiel;
• 5 eine perspektivische Darstellung auf einen mit einem Stator verbundenen Trennkörper auf dessen einem Motorraum zugewandten Seite gemäß dem Ausführungsbeispiel aus 4.

The invention is explained in more detail with reference to exemplary embodiments in the drawings. These show:

• 1 a schematic full-section view of a pump according to an exemplary embodiment;
• 2 a schematic detail representation of a passage opening of a separating body according to detail A from 1 ;
• 3 a schematic detail representation of a passage opening of a separating body to a compared to the one in 2 shown alternative embodiment;
• 4 a perspective view of a partition on its side facing an electrical room according to a further embodiment;
• 5 a perspective view of a separating body connected to a stator on its side facing an engine compartment according to the embodiment shown in 4 .

Pump 1 serves to pump a fluid for a vehicle. Pump 1 has a pump chamber 2 in which at least one pump drive element 3 is arranged for pumping a fluid. The pump drive element 3 is a means that achieves a controlled pressure increase in a pumped fluid. For example, the pump drive element 3 is designed as a vane body or as a displacement body. Furthermore, the pump has a motor chamber 4 in which at least one electric motor 5 driving the pump drive element 3 is arranged. The motor chamber 4 thus forms the space in which the rotor and/or stator 8 of the electric motor is/are arranged or designed. Pump chamber 2 and motor chamber 4 are fluidically connected to each other, i.e., a fluid moving or pumped in pump chamber 2 can enter pump chamber 2. In other words, a fluid exchange can occur between pump chamber 2 and motor chamber 4, since these two spaces are not gas- and/or liquid-tight from each other. In the 1 In the embodiment shown, the pump chamber 3 is surrounded by a pump housing 22 and the motor chamber 4 by a motor housing 23, wherein the pump and motor housings 22, 23 are connected to each other, in particular rather directly, are attached. Alternatively, the pump housing 22 and the motor housing 23 can be formed at least partially, preferably predominantly, and particularly preferably completely, as a single piece or integral component, thereby forming, for example, part or all of a housing body 21. The pump housing 22 has an inlet 24 through which the pumped medium enters an interior space of the pump housing 22, where it undergoes a pressure increase or compression by means of the pump drive element 3 and exits the pump 1 via the outlet 25. The pump drive element 3 can, for example, be designed as an impeller or a paddle wheel and is driven by the electric motor 5, in particular via an output shaft 26 of the electric motor, and exerts a pressure increase on the pumped medium. The pump drive element 3 can, for example, also be designed as a piston.

Optionally, an electrical compartment 6 can be provided, particularly within the pump 1, in which at least one electrical and/or electronic component 7 is arranged. This electrical compartment 6 is fluid-tightly separated from the pump compartment 2 and the motor compartment 4, i.e., the electrical compartment 6 is gas- and/or liquid-tightly separated from the pump compartment 2 and the motor compartment 4. This prevents, in particular, any pumped medium from the pump and/or motor compartment 2, 4 from entering the electrical compartment 6.

In the motor compartment 4, for example, a rotor and a stator 8 of the electric motor 5 can be arranged and/or configured, wherein the rotor and/or the stator 8 are fluidically connected to the pump compartment 2, i.e., enabling gas and/or liquid exchange, such that a pumped medium conveyed in the pump compartment 2 is at least partially in contact with the rotor and/or stator 8. The pumped medium entering the motor compartment 4 can be used as a coolant to cool the rotor and/or stator 8 or develop a corresponding cooling effect.

A separating element 9 can, for example, be arranged between the engine compartment 4 and the electrical compartment 6, or between the engine compartment 4 and the environment. The environment refers to an external space located outside the pump 1. For example, an electrical and/or electronic component that performs a control and/or regulation function for the pump 1 is located outside or separate from the pump 1 and is connected to the electric motor 5 via conductors (not shown). Therefore, this electrical and/or electronic component is located in the environment of the pump 1. The separating element 9 seals the engine compartment 4 and the electrical compartment 6, or the engine compartment 4 and the environment, against each other in a gas- and/or liquid-tight manner.

In an advantageous further development, the separating body 9 can be aligned in its main extension plane perpendicular to a rotation axis 11 of a rotor of the electric motor. As can be seen from the 4 and 5 As can be seen, the separating body 9 can be, in particular essentially, disk-shaped, with individual structures of the separating body 9 extending away from its main extension plane. In particular, individual structures can extend or run perpendicular to the main extension plane.

As an example from 1 , 2 and 4 As can be seen, the separating body 9 can have at least one through-opening 10 for the passage of an electrical conductor 12, wherein the electrical conductor 12 forms an electrical connection between (a) at least one electrical and/or electronic component 7 arranged in the electrical compartment 6 or between an electrical and/or electronic component arranged in the environment and (b) the electric motor 5 arranged in the motor compartment 4. The electrical conductor 12 can, for example, be transferred from a section of the motor compartment supplied with or flooded with the conveyed medium, or capable of being flooded, via the at least one through-opening into a section of the environment and/or into a section of the electrical compartment 6, wherein the conveyed medium cannot pass through the at least one through-opening 10.

It is possible that, in the final assembly state of pump 1, a restoring force or a preload force acts between the feedthrough opening 10 and the electrical conductor 12. For example, the conductor 12 is pressed against at least one wall section of the feedthrough opening 10 by means of a preload force. This pressure can prevent or at least reduce the flow of pumped medium through the feedthrough opening 10, since a potential passage path is closed or reduced at the pressed section due to the pressure forces acting on it. The preload force can also be used to achieve a preliminary fixation between the electrical conductor 12 and the separating element 9, whereby a reinforced fastening effect is achieved in a subsequent process step by means of a further connecting element, in particular a sealant. It is possible that the at least one electrical conductor 12 is at least partially fixed in the at least one feedthrough opening 10 of the separating body 9 by means of a form-fit, force-fit, and/or material-fit connection. For example, the electrical conductor 12 is connected by a The snap-fit connection is attached to the separating element 9. For example, at least one electrical conductor 12 has a protrusion 27, e.g., a bulge relative to its longitudinal extent, cf. 3 Lower electrical conductor 12. This electrical conductor 12 is clamped or pressed in, in particular axially or parallel to the axis of rotation 11, which forms the passage opening 10, due to the protrusion 27 or bulge. This protrusion can extend completely or without gaps around its transverse circumference and thus, due to an interference fit or clamping, have a sealing effect for a conveyed medium, so that it cannot pass through the passage opening 10, or cannot pass through it unhindered.

Alternatively or additionally, as with the one in the 3 The upper electrical conductor 12 shown has a toothed structure 28 or a surface roughening on its surface. When the electrical conductor 12 is inserted, this toothed structure 28 can form a frictional and/or positive-locking connection with the wall area 14 of the separating body 9 that forms or limits the passage opening 10.

Optionally, a first receiving recess 15 can be connected to a further receiving recess 15 via a connecting channel 29, so that in the event of the introduction of a liquid or pasty sealant 13 into a first receiving recess 15, this sealant can pass via the connecting channel 29 into the further connecting channel 29.

Alternatively or additionally, it may be provided that at least one receiving recess 15 and/or at least one feed-through opening 10, in particular at its end facing the engine compartment 4, has a sliding and/or guiding ramp 30, 31, by means of which the insertion of a sealing agent 13, in particular designed as a solid, into the receiving recess 15 or the insertion of an electrical conductor 12 into the feed-through opening 10, in particular from the side facing the engine compartment 4 in the final assembly state, is facilitated.

The at least one electrical conductor 12 can, for example, be sealed to a wall region 14 of the feedthrough opening 10 of the separating body 9 by means of a sealant 13. Preferably, a sealant 13 can be provided as a casting material attached to, in particular in or onto, the separating body 9, and in particular incorporated or applied. For example, a sealant 13 applied as a casting material is cured.

The separating element 9 can, for example, have at least one receiving recess 15 in the area of the feedthrough opening 10 for the passage of an electrical conductor 12, for receiving at least one sealing element 13. The receiving recess 15 can, for example, be designed as a receiving pocket, so that a liquid, pasty, or solid sealing element 13 can be received into the receiving pocket at least partially, preferably predominantly, and particularly preferably completely. The receiving recess 15 allows the sealing element 13 to be deformed or shaped, in particular elastically.

The separating body 9 can, for example, have a retaining structure 17 on its side 16 facing the motor compartment 4 for fastening at least one component of a stator 8 of the electric motor 5. The retaining structure 17 can, for example, be connected or connectable to the at least one component of the stator 8 by means of a force-fit, positive-fit, and/or material-fit connection. The retaining structure 17 can, for example, comprise at least one retaining arm which extends along or parallel to the axis of rotation 11 of the rotor. Preferably, the separating body 9 has at least two, more preferably at least three, and more preferably at least four, retaining arms, each of which extends along or parallel to the axis of rotation 11 of the rotor. Alternatively or additionally, at least one retaining arm, and in particular all retaining arms of the separating body 9, can axially encompass the stator 8 at least partially, preferably predominantly, and more preferably completely.

The component of the stator 8 can, for example, have at least one retaining element 18, which is arranged or formed at an end 19 of the stator 8 facing away from the electrical compartment 6, wherein the retaining element 18 is connected to the retaining structure 17 by force-fit, material-fit, and/or form-fit. Preferably, the stator 8 is connected to the separating body 9 exclusively via at least one retaining arm of the separating body 9. This exclusive connection can be a pre-fixation that occurs during the manufacture of the pump before the stator 8 is further fixed by means of another fastening element. The stator 8 can, for example, be designed as a laminated core consisting of a plurality of laminated lamellae. The retaining element 18 can, for example, be arranged or formed at an end section 32 of the stator 8 facing away from the electrical compartment 6 and made of a plastic material, in particular by injection molding. Preferably, the end section 32 is attached to a surface before the electrical compartment 6 is formed. The end section 32 is arranged or formed at the axial end of a lamination stack 33 of the stator 8, in particular by injection molding. The end section 32 can be formed in one piece or integrally with a region 36 that forms at least a portion of a stator tooth 34 of the stator 8. Preferably, this portion 36, which forms the stator tooth 34, is formed as a partial cover or partial encasing of a stator tooth section 35 of the lamination stack 33 of the stator 8, cf. 5 , 6 until 7 . Area 36 may, for example, have been manufactured using an injection molding process and/or may be made of plastic.

It is possible that the end section 32 has a sliding and/or guiding section 37. This is arranged or formed at a radially outer end or on a radially outer surface of the stator 8. Preferably, the sliding and/or guiding section 37 extends over the entire axial length of the laminated core 33. In particular, a sliding and/or guiding section 37 extending over the entire axial length of the laminated core 33 can serve as a holding element for the laminated core 33 and axially encompass it or form part of an axial circumference.

The sliding and/or guiding section 37 can, for example, have a shape that performs a sliding and/or guiding function during the joining of the stator 8 and the separating body 9. It is possible that the end region 32 has several axially extending and/or elongated sliding and/or guiding sections 37, which partially surround the stator 8 externally.

The separating body 9 can, for example, have a guide and/or centering structure 20 on its side 16 facing the motor compartment 4, for at least partially guiding and/or centering at least one component of a stator 8 of the electric motor 5 during assembly with the separating body 9. This simplifies the assembly of the separating body 9 and at least one component of the stator 8, in particular a stator assembly comprising a laminated core. The guide and centering structure 20 can, for example, be arranged on or formed on the holding structure 17.

The separating body 9 can, for example, be connected or connected to a housing body 21, particularly directly, wherein the electrical compartment 6 and/or the pump compartment 2 and/or the motor compartment 4 is at least partially, preferably predominantly, particularly preferably completely, surrounded by the housing body 21.

The housing body 21 can, for example, be made at least partially, preferably predominantly, and particularly preferably completely, of an electrically conductive material. For example, the housing body 21 is made of metal or of a plastic provided with electrically conductive particles.

Furthermore, the invention comprises a method for manufacturing a pump 1 described herein, wherein in one process step a pump housing defining a pump chamber 2 and a motor housing defining a motor chamber 4 for receiving an electric motor 5 are provided. An electric motor 5 is then arranged in the motor chamber 4 such that the pump chamber 2 and the motor chamber 4 are fluidically connected to each other. It is also possible that a separating element 9, having at least one through-opening 10 for the passage of an electrical conductor 12, is arranged between the motor chamber 4 and an electrical chamber 6 accommodating at least one electrical and/or electronic component 7, or between the motor chamber 4 and an environment, wherein the electrical chamber 6 or the environment is fluidly separated from the motor chamber 4 by means of the separating element 9.

REFERENCE MARK LIST

1

pump

2

Pump room

3

Pump abrasive

4

engine compartment

5

electric motor

6

Electrical room

7

component

8

stator

9

Separating body

10

Feedthrough opening of 9 for 12

11

axis of rotation

12

electrical conductor

13

Sealant

14

Wall area of 9

15

admission exemption

16

Page 9 of 9 (pointing to 4)

17

Support structure

18

Holding device of 8

19

opposite end of 8

20

Management and/or central structure

21

Housing body

22

Pump housing

23

engine housing

24

inlet

25

Outlet

26

Output shaft

27

Highlighting

28

Interlocking structure

29

Connection channel

30

Sliding and/or guiding ramp of 15

31

Sliding and/or guiding ramp of 10

32

Final section of 8

33

Sheet metal package

34

Stator tooth

35

Stator tooth section of 33

36

Area

37

Sliding and/or guiding section of 32

Claims (17)

Pump (1), in particular coolant pump, for pumping a fluid for a vehicle, comprising: - a pump chamber (2) in which at least one pump output element (3) for pumping a fluid is arranged; - a motor chamber (4) in which at least one electric motor (5) driving the pump output element (3) is arranged, wherein - the pump chamber (2) and the motor chamber (4) are fluidically connected to each other. Pump (1) after Claim 1 , characterized by an electrical compartment (6) in which at least one electrical and/or electronic component (7) is arranged, wherein the electrical compartment (6) is fluid-tightly separated from the pump compartment (2) and the motor compartment (4). Pump (1) after Claim 1 or 2 , characterized in that a rotor and a stator (8) of the electric motor (5) are arranged and/or formed in the motor compartment (4), wherein the rotor and/or the stator (8) are fluidically connected to the pump compartment (2) in such a way that a pumped medium conveyed in the pump compartment (2) is at least partially in contact with the rotor and/or stator (8). Pump (1) after Claim 2 or 3 , characterized in that a separating element (9) is arranged between the engine compartment (4) and the electrical compartment (6) or between the engine compartment (4) and an environment, wherein the separating element (9) seals the engine compartment (4) and the electrical compartment (6) or the engine compartment (4) and the environment in a gas- and/or liquid-tight manner. Pump (1) after Claim 4 , characterized in that the separating body (9) is aligned in its main extension plane perpendicular to an axis of rotation (11) of a rotor of the electric motor. Pump (1) after Claim 4 or 5 , characterized in that the separating body (9) has at least one through-opening (10) for the passage of an electrical conductor (12), wherein the electrical conductor (12) forms an electrical connection between - at least one electrical and/or electronic component (7) arranged in the electrical compartment (6) or between an electrical and/or electronic component arranged in the environment and - the electric motor (5) arranged in the motor compartment (4). Pump (1) after Claim 6 , characterized in that in the final assembly state a restoring force or a preload force acts between the feedthrough opening (10) and the electrical conductor (12). Pump (1) after Claim 6 or 7 , characterized in that the at least one electrical conducting means (12) is sealed by means of a sealing means (13) with a wall area (14) of the feedthrough opening (10) of the separating body (9). Pump (1) after Claim 8 , characterized in that the sealing agent (13) can be arranged as a casting material on the separating body (9). Pump (1) after Claim 6 or 9 , characterized in that the separating body (9) in the area of the feedthrough opening (10) for the passage of an electrical conductor (12) has at least one receiving recess (15) for receiving at least one sealing element (13). pump (1) after one of the Claims 4 until 10 , characterized in that the separating body (9) has on its side (16) facing the motor compartment (4) a retaining structure (17) for fastening at least one component of a stator (8) of the electric motor (5). Pump (1) after Claim 11 , characterized in that the component of the stator (8) has a retaining means (18) which is arranged or formed at an end (19) of the stator (8) facing away from the electrical compartment (6), wherein the retaining means (18) is connected to the retaining structure (17) by force and/or material and/or form-fit. pump (1) after one of the Claims 4 until 12 , characterized in that the separating body (9) has a guide and/or centering structure (20) on its side (16) facing the motor compartment (4), for at least partially guiding and/or centering at least one component of a stator (8) of the electric motor (5) during joining with the separating body (9), preferably the guide and centering structure (20) is arranged or formed on the holding structure (17). pump (1) after one of the Claims 4 until 13 , characterized in that the separating body (9) is connectable or connected, in particular directly, to a housing body (21), wherein the electrical compartment (6) and/or the pump compartment (2) and/or the motor compartment (4) is at least partially, preferably predominantly, particularly preferably completely, surrounded by the housing body (21). Pump (1) after Claim 14 , characterized in that the housing body (21) is formed at least partially, preferably predominantly, particularly preferably completely, from an electrically conductive material. A method for manufacturing a pump (1) according to any of the preceding claims, comprising the following process steps: - Providing (100) a pump housing defining a pump chamber (2); - Providing a motor housing defining a motor chamber (4) for receiving an electric motor (5); - Arranging an electric motor (5) in the motor chamber (4) such that the pump chamber (2) and the motor chamber (4) are fluidically connected to each other. Procedure according to Claim 16 , characterized by arranging a separating means (9) having a feedthrough opening (10) for the passage of an electrical conductor (12) between the engine compartment (4) and an electrical compartment (6) accommodating at least one electrical and/or electronic component (7) or between the engine compartment (4) and an environment, wherein the electrical compartment (6) or the environment is fluid-tightly separated from the engine compartment (4) by means of the separating means (9).