Pump device

Abstract

The invention relates to a pump device, in particular a coolant pump device, comprising: at least one rotor (12), which has an axis of rotation (32) and is designed to convey a fluid, in particular a coolant; at least one pump tank (14) and at least one pump cover (16), each of which at least partially forms a fluid channel (18) arranged helically around the axis of rotation (32), which fluid channel is designed to guide a fluid conveyed by the rotor (12), and which fluid channel has at least one fluid outlet (20), the fluid outlet is configured to output the fluid from a fluid channel (18) arranged helically around an axis of rotation (32). According to the invention, the pump cover (16) contacts the pump tank (14) only on a surface (10) of the pump tank (14) arranged at least substantially perpendicular to the axis of rotation (32) of the rotor (12).

Description

Technical Field

[0001] The invention relates to a pump device. Background Art

[0002] A pump device, in particular a coolant pump device, has been proposed, which comprises: at least one rotor, which has a rotation axis and is configured to convey a fluid, in particular a coolant; at least one pump tank and at least one pump cover, which each at least partially constitute a fluid channel arranged spirally around the rotation axis, the fluid channel being configured to guide the fluid conveyed by the rotor, and the fluid channel having at least one fluid outlet, which is configured to discharge the fluid from the fluid channel arranged spirally around the rotation axis. Summary of the invention

[0003] The present invention relates to a pump device, in particular a coolant pump device, comprising: at least one rotor, which has a rotation axis and is configured to convey a fluid, in particular a coolant; at least one pump tank and at least one pump cover, which each at least partially constitute a fluid channel arranged spirally around the rotation axis, the fluid channel being configured to guide the fluid conveyed by the rotor, and the fluid channel having at least one fluid outlet, which is configured to discharge the fluid from the fluid channel arranged spirally around the rotation axis.

[0004] It is provided that the pump cover contacts the pump pot only on one, in particular only one, surface of the pump pot, which surface is arranged at least substantially perpendicular to the axis of rotation of the rotor.

[0005] By means of the design of the pump device according to the invention, a high efficiency can be advantageously provided, since in particular the pump pot contacts only one surface of the pump pot and thus flow losses are kept low. Advantageous properties can be provided in terms of construction, since in particular the pump pot contacts only one surface of the pump pot and thus sealing points can be omitted, and thus a particularly small construction space can also be provided. A high flexibility can advantageously be provided, since in particular the outflow direction can be freely selected along the circumferential direction of the rotor and is not dependent, for example, on the perforation pattern of the cover screw connection. A low-cost construction can advantageously be provided, since in particular material costs are saved. A low manufacturing complexity can advantageously be provided, since in particular a simple geometry must be produced, since the pump pot contacts only one, in particular flat, surface of the pump pot.

[0006] The pump device is preferably set up for a means of transport. The means of transport can be, for example, a car, a commercial vehicle, an airplane, a train or a similar means of transport. As an alternative, the pump device can also be used in stationary applications. The pump device is set up to circulate a fluid, such as a coolant. The fluid is configured as cooling water. As an alternative, the fluid can also be configured as glycol or oil, etc. It is conceivable that the fluid has additives, such as antifreeze, preservatives, etc. The fluid preferably has an aggregated state, especially a liquid state, during operation. The pump device preferably has at least one rotor. The rotor is configured to rotate around the axis of rotation. The rotor preferably has a plurality of working blades. The working blades of the rotor are preferably set up to convey energy to the fluid. The working blades of the rotor preferably generate a fluid pressure, which is configured to circulate the fluid. The working blades of the rotor are preferably set up to convey the fluid in a radial direction. The pump device preferably has a stator. The stator is preferably configured to drive the rotor. The pump tank is preferably configured to receive the stator. The pump tank preferably has at least one surface that is especially at least substantially flat and extends at least substantially perpendicular to the axis of rotation of the rotor. In particular, the surface is formed at least substantially parallel to the main extension plane of the pump tank. Preferably, the surface is configured as an end face of the pump tank. Preferably, the surface has an annular shape. Preferably, the center point of the surface and / or the center axis of the pump tank coincide with the rotation axis of the rotor. Preferably, the surface is provided for receiving a pump cover. Preferably, the surface of the pump tank is formed as a base surface for receiving the pump cover. Preferably, the surface is at least partially established for partially defining a fluid channel. Preferably, the fluid channel is constructed in two parts. Preferably, the pump cover has an open, especially concave shape, which forms a closed fluid channel by contact with the surface. Preferably, the pump cover is established to define a spiral shape on a flat surface. Preferably, the pump cover is arranged at least between the pump tank and the pump housing. It is conceivable that the pump cover can be adjusted along the circumferential direction of the rotor. Preferably, the pump cover is configured as an inlet. Preferably, the fluid channel has at least one fluid outlet. Preferably, the shape of the fluid outlet is defined by the pump cover. Preferably, the fluid outlet is formed by the pump cover and the pump tank. Preferably, the fluid outlet of the fluid channel is connected to the fluid pipeline of the housing or similar pump component. As an alternative, the fluid outlet opens into the interior space of the pump device. Preferably, the cross section of the fluid channel, in particular, arranged at least substantially parallel to the rotation axis of the rotor and / or parallel to the radial direction of the rotor, is configured to increase along the circumferential direction of the rotor, preferably the rotation direction. Preferably, the inner radius of the spiral shape along the circumferential direction of the rotor is at least substantially constant. Preferably, the outer radius of the spiral shape along the circumferential direction of the rotor, in particular the rotation direction, is configured to increase. Preferably, the spiral shape extends at least within an angle of 360°. "Inner radius" here should especially refer to a shape, in particular a fluid channel, at a specific location, in particular along the pump cover, for example, the minimum radius in the circumferential direction with respect to the rotation axis of the rotor."Outer radius" should in particular refer to a shape, in particular a fluid channel, at a specific location, in particular along the pump cover, for example, the maximum radius in the circumferential direction of the axis of rotation of the rotor. "Spiral shape" should in particular refer to a direction along the circumferential direction, which has a diameter expansion portion and is in particular not self-closed. "At least substantially" in this regard should in particular mean that the deviation from the predetermined value is in particular less than 25%, preferably 10% and particularly preferably 5% of the predetermined value. "Established" should in particular refer to specially designed and / or equipped. "The body is established for a specific function" should in particular mean that the object performs and / or executes this specific function in at least one application state and / or operating state. The "main extension plane" of the structural unit should in particular refer to the following plane, which is parallel to the largest side of the smallest imaginary cuboid that just completely surrounds the structural unit and extends in particular through the center point of the cuboid.

[0007] It is further proposed that the fluid outlet is formed at least partially by the pump tank. A lower manufacturing complexity can advantageously be provided, since in particular the pump cover has a simple geometry. A high efficiency of the pump device can advantageously be provided, since in particular flow losses in the fluid channel are kept low. Preferably, the fluid outlet is formed / defined at least by the pump tank and the pump cover. Preferably, the fluid outlet is predetermined by the shape of the pump cover, wherein the surface of the pump tank forms a bearing surface for the pump cover. Preferably, the pump tank is designed to close the open shape of the pump cover in the state assembled with the pump cover. Preferably, the fluid outlet is constructed in at least two parts.

[0008] It is further proposed that the fluid outlet is configured as an opening face in the pump cover, which has a plane normal that is at least substantially oriented radially outward. Advantageous properties can be provided in terms of structure, because in particular the fluid outlet is defined by the pump cover and the pump tank can thus have a particularly simple geometry. Preferably, the opening face in the pump cover has a plane normal that is particularly at least substantially, preferably at least mostly, oriented radially outward. Preferably, the opening face has a perimeter that is at least partially formed by the pump tank and at least partially by the pump cover. In particular, the shape of the opening face is defined by the pump cover, which is closed by the particularly flat pump tank. Preferably, the opening face is partially defined by the pump cover. Preferably, the opening face is partially defined by the pump tank. Preferably, the pump cover has a curved shape at the fluid outlet, which defines the opening face of the fluid outlet. Preferably, the circumferential region of the opening face defined by the pump tank has a curved, preferably circular course. Preferably, the circumferential region of the opening face defined by the pump cover has a particularly simple curved course. It is conceivable that the opening face extends at least substantially tangentially to the radius of the fluid channel and / or to the radius of the surface, in particular the outer radius. As an alternative, it is conceivable that the plane normal of the opening face of the fluid channel is arranged at least substantially perpendicular to the radius of the fluid channel and / or perpendicular to the axis of rotation of the rotor. The expression "at least mostly" is intended to mean an angular deviation of, in particular, less than 45°, advantageously less than 25°, preferably less than 15°, particularly preferably less than 5°. "Plane normal" is intended to mean, in particular, a direction arranged perpendicular to the surface.

[0009] It is further proposed that the fluid outlet is constructed as an opening face in the pump cover, which extends along the circumferential direction of the pump cover within the range of a fan having a minimum fan angle of at least 10°, preferably at least substantially 45°. High efficiency can be advantageously provided, because in particular the opening face causes particularly small flow losses. Preferably, the fan has a minimum fan angle, which defines the maximum extension of the opening face along the circumferential direction of the pump cover. In particular, the fan has a minimum fan angle of at least 5°, preferably at least 15° and preferably at least 35°. Preferably, the opening face extends along the outer radius of the surface of the pump tank. Preferably, the fluid outlet is constructed as a cross-section of the pump cover extending along the circumferential direction of the rotor. Preferably, the opening face of the fluid outlet is curved at least within the range of a part of the perimeter of the opening face, preferably within the range of the entire perimeter of the opening face. It is conceivable that at least a part of the perimeter of the opening face extends at least substantially straight. Preferably, the opening face of the fluid outlet has at least a substantially constant radius when observed perpendicular to the surface of the pump cover. As an alternative, it is conceivable that the radius of the opening surface, viewed perpendicularly to the main extension surface of the pump cover, is designed to be variable. Preferably, the fluid channel runs at least substantially tangentially to the circumferential direction of the rotor in the outlet region.

[0010] It is further proposed that the pump cover is designed as a metal sheet metal component. This can advantageously provide a lower manufacturing complexity, since in particular the pump cover can be manufactured in a single forming process. A low-cost structure can advantageously be provided, since in particular the wall thickness can be reduced by the sheet metal component, so that less material must be used. Advantageous properties can advantageously be provided in terms of structure, since the weight is lower, in particular due to the use of sheet metal components. Preferably, the sheet metal component is designed as a formed part, preferably a deep-drawn part. Preferably, the pump cover has at least essentially a constant wall thickness. "Sheet metal" should here particularly refer to a metallic, in particular plastically deformable workpiece, which has a small wall thickness of in particular less than 5 mm, preferably less than 1 mm.

[0011] In addition, it is proposed that the connection between the pump cover and the pump tank is formed without a sealing portion, in particular without an additional sealing element. A low-cost structure can be advantageously provided, because in particular the sealing portion can be abandoned, and the high efficiency of the pump device can be advantageously provided, because in particular due to the abandonment of the sealing portion, the fluid outlet can be arranged radially and the fluid does not need to be diverted. For example, a sealing portion can be constructed between the housing and the pump tank. For example, the sealing portion between the housing and the pump tank can be established to prevent the fluid from flowing out. For example, the pump cover is connected to the pump tank in a force-locking and / or form-locking manner. It is conceivable that the pump cover can be rotatable relative to the pump tank, in particular positionable, along the circumferential direction relative to the pump tank. "Force-locking and / or form-locking" should here in particular refer to a releasable connection, wherein the two components are preferably connected by a geometric fit of the components among each other and / or a normal force acting in the normal direction of the surface.

[0012] In addition, it is proposed that the pump cover can be fixed to the rotor shaft bolt of the rotor by means of a thrust washer. Advantageous properties can be provided in terms of construction, because in particular a particularly simple connection of the pump cover to the pump tank can be provided. Preferably, the thrust washer is connected to the rotor shaft bolt in a force-locking and / or form-locking manner. As an alternative, the thrust washer can be formed integrally with the pump cover. "Rotor shaft bolt" should here in particular refer to a preferably cylindrical component that is designed to support the rotating rotor. "Integrally" should in particular refer to at least a materially locked connection, such as by a welding process, an adhesive bonding process, an injection molding process and / or other processes that appear meaningful to a person skilled in the art and / or such as, for example, by manufacturing from a casting and / or by manufacturing in a single component or multi-component injection molding method and advantageously formed entirely from a single blank.

[0013] It is further proposed that the pump cover is fixed, in particular stamped, on the pump tank in a force-locking and / or form-locking manner by means of at least one connecting element. Advantageous properties can be provided in terms of structure, because in particular a force-locking and / or form-locking connection of the pump cover on the pump tank can provide high rigidity and can fix the position of the pump tank relative to the pump cover. Preferably, the connecting element is designed to be deformed in order to carry out a force-locking and / or form-locking connection. Preferably, the connecting element is designed to connect the pump tank and the pump cover in an axial direction. Preferably, the connecting element is designed to fix the pump cover on the end face, in particular the surface, of the pump tank / to the end face, in particular the surface of the pump tank. Preferably, the axial direction is arranged at least substantially parallel to the axis of rotation. "Force-locking and / or form-locking connection" should here in particular refer to a releasable connection, wherein the retaining force between the two components is preferably transmitted by the fit of the components in each other and / or the friction between the components. In this context, “stamping” is intended to mean, in particular, a frictional and / or positive connection of at least two components, preferably produced by connecting elements which are formed by plastic deformation of the material.

[0014] The pump device according to the invention should not be restricted to the embodiments of the application described above. In particular, the pump device according to the invention can have a number of individual elements, components and units that differs from the number mentioned at this point in order to implement the functional principle described at this point. In addition, for the numerical ranges specified in this disclosure, the values ​​within the mentioned limits should also be regarded as disclosed and can be used arbitrarily. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further advantages are apparent from the following description of the drawings. An embodiment of the invention is shown in the drawings. The drawings, the description and the claims contain a large number of features in combination. A person skilled in the art will also appropriately view these features individually and combine them into other meaningful combinations.

[0016] in:

[0017] Figure 1 A pump device having a pump cover and a pump can is shown;

[0018] Figure 2 shows a schematic top view of a pump cover and pump can; and

[0019] Figure 3 A pump device having a fluid passage and a fluid outlet is shown. DETAILED DESCRIPTION

[0020] Figure 1A schematic cross-sectional view of a pump device is shown. The pump device is configured as a coolant pump device. The pump device is set up for a means of transport. The means of transport can be configured as, for example, a car, a commercial vehicle, an airplane, a train, a ship, etc. The pump device is set up to circulate a fluid. The fluid is configured as a coolant. The pump device has a stator 28. The stator 28 has a disc shape. The stator 28 has a winding 30. The winding 30 is set up to generate a magnetic field. The pump device has a rotor 12. The magnetic field of the winding 30 is set up to drive the rotor 12. The rotor 12 has an axis of rotation 32. The rotor 12 is set up to rotate around the axis of rotation 32. The rotor 12 is set up to convey a fluid. The rotor 12 has working blades 34. The working blades 34 are set up to generate a fluid pressure along a radial direction 36 of the rotor 12. The fluid pressure is set up to move the fluid. The radial direction 36 extends perpendicular to the axis of rotation 32 of the rotor 12. The pump device has a pump cover 16. The pump cover 16 is fixed to the rotor shaft bolt 26 of the rotor 12 via a thrust washer 24. As an alternative, the thrust washer 24 is formed integrally with the pump cover 16. The pump device has a pump pot 14. The pump pot 14 is provided for receiving a stator 28.

[0021] Figure 2A schematic perspective view of a pump device is shown. The pump cover 16 extends around the rotation axis 32 of the rotor 12 in the assembled state. The pump cover 16 has a circular shape. The pump cover 16 has a suction hole in the center of the housing. The pump cover 16 partially constitutes a fluid channel 18 arranged spirally around the rotation axis 32. The pump tank 14 extends around the rotation axis 32 of the rotor 12 in the assembled state. The pump tank 14 has a circular shape. The pump tank 14 has a rotor recess in the center of the housing. The pump tank 14 partially constitutes a fluid channel 18 arranged spirally around the rotation axis 32. The pump cover 16 contacts the pump tank 14 only on the surface 10 of the pump tank 14. The surface 10 of the pump tank 14 is arranged perpendicular to the rotation axis 32 of the rotor 12. The surface 10 is constructed as an end face of the pump tank 14. The surface 10 is flat. The surface 10 is arranged parallel to the main extension plane of the pump tank 14. The fluid channel 18 is established to guide the fluid transported by the rotor 12. The fluid channel 18 has a fluid outlet 20. The fluid outlet 20 is arranged at the end of the spiral fluid channel 18 having the largest cross section of the fluid channel 18. The fluid outlet 20 is set up to output the fluid from the fluid channel 18 arranged spirally around the rotation axis 32. The fluid outlet 20 is formed in part by the pump cover 16. The fluid outlet 20 is formed in part by the pump tank 14. The fluid outlet 20 is constructed as an opening surface 48 in the pump cover 16. The fluid outlet 20 is constructed in two parts. The opening surface 48 in the pump cover is oriented radially outward. The opening surface 48 has a plane normal. The plane normal is oriented radially outward. The plane normal is arranged parallel to the radius of the pump cover 16. The plane normal is arranged perpendicular to the rotation axis 32. The opening surface 48 extends along the outer radius of the surface 10 of the pump tank 14. The fluid outlet 20 is constructed as a cross section of the pump cover 16 extending along the circumferential direction of the pump cover 16. The opening surface 48 of the fluid outlet 20 is formed in a curved manner within the entire circumference of the opening surface 48. As an alternative, a part of the circumference of the opening surface 48 can also extend straight. The opening surface 48 of the fluid outlet 20 has a constant radius when observed perpendicularly to the surface 10 of the pump cover 16. As an alternative, the radius of the opening surface 48 can be variably formed when observed perpendicularly to the main extension plane of the pump cover 16. The fluid channel 18 extends tangentially to the circumferential direction 44 of the rotor 12 in the outlet area 46. The fluid channel 18 extends tangentially to the circumferential direction 22 of the pump cover 16 in the outlet area 46. The fluid channel 18 and the outlet area 46 are in a common plane formed by the surface 10 of the pump tank 14. The common plane is arranged perpendicular to the axis of rotation 32. The opening surface 48 in the pump cover 16 extends along the circumferential direction 22 of the pump cover 16 within the range of a sector having a minimum sector angle 42 of 45°. The opening surface 48 has a circumference. The perimeter of the opening face 48 is formed in part by the pump tank 14. The perimeter of the opening face 48 is formed in part by the pump cover 16. The shape of the opening face 48 is defined by the pump cover 16.The opening surface 48 formed by the pump cover 16 has an open shape. The opening surface 48 is closed along the perimeter of the opening surface 48 by the flat pump tank 14. The opening surface 48 is partially defined by the pump cover 16. The opening surface 48 is partially defined by the pump tank 14. The pump cover 16 has a simple curved shape at the fluid outlet 20. The curved shape defines the opening surface 48 of the fluid outlet 20. The perimeter of the opening surface 48 defined by the pump tank 14 has a circular direction. The pump cover 16 can be rotated along the circumferential direction 22 of the pump cover 16. The position of the fluid outlet 20 along the circumferential direction 22 can be adjusted thereby. The pump cover 16 is constructed as a plate component. The pump cover 16 is constructed as a molded component. The pump cover 16 is constructed as a deep-drawn part. The pump cover 16 is made of a metal material. The pump cover 16 has a constant wall thickness. The pump cover 16 is fixed to the pump tank 14 in a force-locking and / or form-locking manner with a connecting element 50. The pump cover 16 is stamped together with the pump tank 14. The connecting element 50 is designed to be plastically deformed for a force-locking and / or form-locking connection. The connecting element 50 is designed to fix the pump cover 16 on / to the surface 10 of the pump tank 14. The connecting element 50 is designed to connect the pump tank 14 and the pump cover 16 along an axial direction 52. The axial direction 52 is arranged parallel to the axis of rotation 32. The connecting element 50 is composed of a material that is softer than the material of the pump tank 14 and the pump cover 16. As an alternative or in addition, the pump cover 16 can also be directly connected to the pump tank 14. As an alternative or in addition, the pump tank 14 and the pump cover 16 can also be riveted to each other.

[0022] Figure 3 The fluid outlet 20 of the fluid channel 18 is shown. The fluid outlet 20 extends perpendicularly to the rotation axis 32, see Figure 2 . The pump cover 16 is connected to the pump tank 14 without any sealing parts. The pump device has no sealing element, such as an O-ring composed of an elastomer, between the pump cover 16 and the pump tank 14. The pump device has no sealing element that is in contact with the pump cover 16 and the pump tank 14 at the same time. It is conceivable that a sealing effect is produced by the connection between the pump cover 16 and the pump tank 14. The pump device has a seal 40 between the pump tank 14 of the pump device and the housing 38. The seal 40 prevents the fluid from flowing out of the internal space of the pump. The seal 40 is composed of an elastomer. The seal 40 has an O-ring as a sealing element.

Claims

1. A pump device, in particular a coolant pump device, comprising: at least one rotor (12), which has a rotation axis (32) and is designed to convey a fluid, in particular a coolant; at least one pump tank (14) and at least one pump cover (16), which each at least partially form a fluid channel (18) arranged helically around the rotation axis (32), the fluid channel being designed to guide the fluid conveyed by the rotor (12), and the fluid channel having at least one fluid outlet (20), which is designed to discharge the fluid from the fluid channel (18) arranged helically around the rotation axis (32), characterized in that The pump cover (16) contacts the pump pot (14) only on a surface (10) of the pump pot (14) which is arranged at least substantially perpendicular to the axis of rotation (32) of the rotor (12).

2. The pump device according to claim 1, characterized in that The fluid outlet (20) is formed at least in part by the pump tank (14).

3. Pump device according to any one of the preceding claims, characterized in that The fluid outlet (20) is designed as an opening surface in the pump cover (16), which has a surface normal which is oriented at least substantially radially outward.

4. Pump device according to any one of the preceding claims, characterized in that The fluid outlet (20) is configured as an opening surface in the pump cover (16), which extends along the circumferential direction (22) of the pump cover (16) within a minimum sector angle (42) of at least 10°.

5. Pump device according to any one of the preceding claims, characterized in that The pump cover (16) is designed as a metal sheet-metal component.

6. Pump device according to any of the preceding claims, characterized in that The connection between the pump cover (16) and the pump pot (14) is designed without any sealing points.

7. Pump device according to any one of the preceding claims, characterized in that The pump cover (16) is fixed to the rotor shaft bolt (26) of the rotor (12) via a thrust plate (24).

8. Pump device according to any one of the preceding claims, characterized in that The pump cover (16) is fixed, in particular stamped, to the pump pot (14) in a non-positive and / or positive locking manner by means of at least one connecting element (50).

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