EP3289225A1

EP3289225A1 - Pump having a plurality of adjustable outlet openings

Info

Publication number: EP3289225A1
Application number: EP16704131.8A
Authority: EP
Inventors: Thomas Geffert
Original assignee: Dr Ing HCF Porsche AG
Current assignee: Dr Ing HCF Porsche AG
Priority date: 2015-04-29
Filing date: 2016-02-11
Publication date: 2018-03-07
Also published as: WO2016173722A1; US20180149171A1; CN107567546B; CN107567546A; DE102015106639A1; US10570921B2

Abstract

The invention relates to a pump (1, 101) comprising a pump housing (2, 102) having an intake opening (5, 105) and a plurality of outlet openings (6, 106), comprising a pump wheel (9, 109) that is accommodated in the housing (2, 102) in a rotationally drivable manner in order to effect a fluid stream from the intake opening (5, 105) to the respective outlet opening (6, 106). Radially outside the pump wheel (9, 109) inside the housing (2, 102), an adjustable ring element (13, 113) is provided, by means of which the fluid stream through the respective outlet opening (6, 106) can be regulated.

Description

PUMP WITH SEVERAL ADJUSTABLE EXHAUST OPENINGS

The invention relates to a pump, in particular a water pump for a

Motor vehicle.

Water pumps, especially as coolant pumps in motor vehicles, are well known. Thus, for example, by DE 195 45 561 AI such a water pump has become known as a radial pump, the water in the axial direction over a

Inlet port sucks and promotes radially outward via an impeller and discharges radially on the outside. The CH 133 892 discloses such a pump, which has a radially displaceable in the axial direction annular slide, which regulates the flow radially outside of the impeller. Also, the annular slide can be rotated in the circumferential direction, in which case openings of the annular slide in coverage or except

Cover with mouths of connecting channels are adjustable. This can also be done a flow limitation. The annular slide is designed to be hydraulically displaceable in the axial direction or in the circumferential direction.

By means of the slide the fluid flow is adjusted at the outlet of the pump. However, a specific distribution of the fluid flow does not take place.

It is the object of the present invention to provide a pump which is simple in construction yet has good adjustability or controllability

different fluid flows allowed. The object is achieved with the features of claim 1.

An embodiment of the invention relates to a pump having a pump housing with a suction opening and with a plurality of outlet openings, with a pump wheel, which is received in a rotatably drivable manner in the housing, in each case to effect a fluid flow from the suction opening to the respective outlet opening, wherein radially outside the impeller and within the housing, an adjustable ring element is provided, by means of which the fluid flow through the respective

Outlet opening is adjustable. As a result, a pump can be created which can generate a plurality of adjustable or controllable fluid flows, wherein the respective fluid flow can be adjusted, for example, by an actuatory adjustment of the annular element. The pump is nevertheless compact and easy to assemble.

In an advantageous embodiment, it is expedient if the housing is substantially cylindrical with a first end wall and with a second end wall and with a radially outer circumferential wall, wherein the plurality of outlet openings is arranged on the radially outer circumferential wall. As a result, the outlet openings can be arranged distributed around the circumference, so that the outflow takes place via these distributed outlet openings. The controllability of the fluid flows depends on the arrangement of the outlet openings and the design of the ring element.

It is also advantageous if the outlet openings are distributed on the radially outer circumferential wall in the circumferential direction and are arranged at a distance from one another. Thus, by the location and / or the formation of the outlet openings the

Fluid flows are influenced by the respective outlet opening.

Furthermore, it is expedient if the suction opening is arranged on one of the two end walls. Thus, a favorable design can be made because the suction-side fluid flow can take place in the axial direction, while the pressure-side outlet flow can take place in the radial direction.

In a further embodiment, it is advantageous if a drive shaft engages through the other of the two end walls through an opening arranged therein, for driving the pump wheel. Thus, the impeller can be driven by an external drive, such as pulley of a belt drive. It is also advantageous if within the housing, a drive means is arranged, by means of which the impeller is driven. This drive means can

for example, be an electric motor or the like.

It is particularly advantageous if the adjustable ring element has a plurality of spiral channels extending radially from radially to radially outward, which respectively open into an opening of a plurality of openings arranged radially on the outside of the ring element. As a result, the entire fluid flow generated can be subdivided into individual proportionate fluid streams, so that the respective fluid flow leading to the respective outlet opening is led through the respective spiral-shaped fluid channel from the impeller radially outward to the outlet opening. The respective fluid channels are formed spirally in order to be able to lead the fluid flow to the outlet opening without great pressure loss.

It is particularly advantageous if at least one sealing element is arranged radially between the adjustable ring element and the radially outer circumferential wall of the housing in the region of the respective outlet opening or a plurality of sealing elements are arranged. Thereby, the fluid flow through the outlet opening can be restricted and leakage flows can be prevented. The sealing element also serves to interrupt the fluid flow through the respective outlet opening when the ring element is set such that the outlet opening should be closed. Even then there should be no leakage flow. It is particularly advantageous if the sealing element is designed in such a way or the sealing elements are formed such that it has an arcuately curved wall or they have an arcuately curved wall into which an opening is introduced, wherein at the opening a radially outwardly projecting projecting wall section protrudes from the wall. Thus, the ring element can create radially on the outside of the sealing element and is thereby sealed. It is also advantageous if the wall section projects into an outlet opening. Thus, the wall portion can be advantageously held by the intervention in the opening in its position.

It is also advantageous if the at least one outlet opening is surrounded by a connecting piece which protrudes from the radially outer circumferential wall of the housing. As a result, a connection hose or pipe can be connected and at the same time the sealing element can be securely fixed.

It is also advantageous if the adjustable ring element is adjustable in the circumferential direction by means of an actuator. As a result, the respective fluid flow through the respective outlet opening can be adjusted. It is advantageous if the

Ring element is rotatable about a defined angle of rotation, as can be rotated back and forth in order to take a defined position between the two end positions and including this can.

It is also advantageous if the actuator is a pneumatic, hydraulic,

magnetic and / or electromotive actuator is. This corresponding actuator can cause a rotational movement, which is transferable to the ring member. Also, the actuator can generate a translational movement, which is transferable in a rotational movement of the ring member. Thus, it is also advantageous if by means of the actuator, the setting of the ring member can be fixed, so that the assumed position does not change unintentionally during operation.

It is also advantageous if a sealing element is arranged axially between the impeller and the adjustable ring element on the one hand and an end wall of the housing on the other hand. This sealing element seals the interior towards the intake opening, so that no leakage flows occur in this direction. It is also advantageous if the sealing element has a substantially annular disc with an opening, from which projects around the opening around a projecting in the axial direction of the nozzle, which engages in the suction port. As a result, an advantageous seal can be made at the intake opening or a connecting piece surrounding it.

In the following the invention will be explained in detail by means of an embodiment with reference to the drawing. In the drawing: FIG. 1 shows an exploded view of an embodiment of a

pump according to the invention,

FIG. 2 shows an exploded view of a further embodiment of a pump according to the invention,

3 shows a sectional view of an embodiment of a pump according to the invention,

FIG. 4 shows a side view of an embodiment of a pump according to the invention,

Figure 5 is another side view of an embodiment of a

Pump according to the invention, Figure 6 is another side view of an embodiment of a

pump according to the invention,

7 shows a view of an opened embodiment of a pump according to the invention with an adjustable ring element, FIG. FIG. 8 shows a view of an outlet opening,

FIG. 9 shows a schematic view of an operating position of the ring element relative to the outlet opening,

FIG. 10 shows a schematic view of a further operating position of the ring element relative to the outlet opening,

Figure 11 is a schematic view of another operating position of the ring member relative to the outlet opening, and

Figure 12 is a schematic view of another operating position of the ring member relative to the outlet opening. 1 shows an embodiment of a pump 1 according to the invention in an exploded view.

The pump has a pump housing 2, which has a first housing part 3 as a housing pot and a second housing part 4 as a housing cover. The second housing part 4 can be placed on the first housing part 3, so that it can be closed and sealed and defines a pump chamber.

The pump housing 2 has an intake opening 5 for sucking in a fluid. Also, the pump housing 2 has at least one outlet opening 6, for discharging the pumped fluid. The pump housing 2 is substantially cylindrical and has two end walls 7 and a peripheral wall 8. In this case, the outlet openings 6 are arranged in the peripheral wall 8 and spaced from each other. The suction opening 5 is arranged on the one end wall 7. In the pump housing 2, an impeller 9 is provided, which is formed rotatably drivable. In this case, a drive 12 is provided which, for example, a

Electric motor or a pulley drive of a belt drive can be. Other drives are used. By the rotation of the impeller 9 is a

Fluid flow from the suction port 5 toward the at least one outlet opening 6 generates.

The impeller 9 is arranged by means of a sliding ring 10 on a shaft 11, so that the impeller 9 rotates upon rotation of the shaft 11 and the impeller 9 rotatably supported on the other elements of the pump, such as the housing 2.

For driving the impeller, for example, the drive motor 12 is provided, which may be formed as an electric motor and the drive shaft 11 protrudes into the housing 2 and the impeller 9 drives. Alternatively, a drive means can also be arranged within the housing, by means of which the impeller 9 can be driven.

Radially outside the impeller 9, an adjustable ring element is further provided within the housing 2, by means of which the fluid flow through the respective outlet opening 6 is adjustable.

The adjustable ring element 13 in this case has a plurality of spiral radially from radially inward to radially outwardly extending fluid channels 14, which radially outwardly each in an opening 15 of a plurality of radially outward on the ring element 13th

arranged openings 15 open. The fluid channels 14 are open radially inside and communicate with the impeller 9 in order to accommodate the fluid flow of the impeller 9 can. The radially inner region of the ring element 13 lies radially outside the impeller 9, and the ring element 13 receives the impeller 9 in a central recess 16. Axially between the ring member 13 and the impeller 9 on the one hand and the cover 4 of the housing on the other hand, a sealing element 17 is arranged, which serves as a lid of the ring member 13, which serves as a spiral regulator. This sealing element has a radially extending region 18 and an axial stub 19. The radially extending portion 18 covers the ring member 13 laterally at least partially and the nozzle 19 engages in the suction port 5 a.

Radially between the adjustable ring element 13 and the radially outer peripheral wall or annular wall 8 of the housing 2, at least one sealing element 20 is arranged in particular in the region of the respective outlet opening 6. Also, a plurality of such sealing elements 20 may be arranged.

The sealing element 20 or the sealing elements 20 are designed such that it or they have an arcuately curved wall 21 or in which an opening 22 is introduced, wherein at the opening 22 a radially outwardly projecting circumferential wall portion 23 as a kind of neck protrudes from the wall 21. Trained as a neck circumferential wall portion 23 engages in the

Outlet opening 6 of the housing 2 a.

If the ring element 13 rotates in the housing, fluid communication can be achieved by covering at least one of the openings 15 with one of the outlet openings 6, resulting in an outlet-side fluid flow. As FIG. 1 shows, the outlet openings 6 are distributed on the radially outer peripheral wall or annular wall 8 of the housing in the circumferential direction and are arranged at a distance from one another. By the appropriate choice of the positioning of the openings 15 and their shape can be achieved by rotation of the ring member targeted control of the outlet. 2 shows a comparable embodiment of a pump according to Figure 1, wherein in Figure 2, an actuator 40, for example in the form of a vacuum box, is provided to adjust the ring member 13 can. For this purpose, the actuator 40 a

Coupling rod 41 which engages in a guide 42 of the housing 2 and is connected to a 5 arm 43 of the ring member 13. By a longitudinal displacement of

Coupling rod 41, the ring member 13 is rotated.

FIG. 3 shows a sectional view of a pump 101 with a housing 102. The pump housing 102 has a first housing part 103 as a housing pot and a second housing part 104 as a housing cover. The second housing part 104 is placed on the first housing part 103, so that the housing is closed and sealed and defines a pump chamber.

The pump housing 102 has an axially aligned suction opening 105 for the suction of a fluid. Also, the pump housing 102 has at least one radially outwardly leading outlet opening 106 for discharging the pumped fluid.

The pump housing 102 is substantially cylindrical and has two end walls 107 and a peripheral wall 108. In this case, the outlet opening 106 or the outlet openings 106 are arranged in the circumferential wall 108. With more than 20 of an outlet opening 106, these are advantageously spaced in the circumferential direction

arranged to each other. The suction opening 105 is arranged on the one end wall 107.

In the pump housing 102, the impeller 109 is provided, which

25 is formed rotatably drivable. In this case, a drive is provided, which is shown for example as a pulley drive 199 of a belt drive. Other drives are used, such as an electric motor.

The rotation of the pump wheel 109 generates a flow of fluid from the suction opening 30 105 to the at least one outlet opening 106. The impeller 109 is arranged on a shaft 111 by means of a sliding ring 110, so that the

Impeller 109 rotates upon rotation of the shaft 111 and rotatably supports the impeller 109 on the other elements of the pump, such as on the housing 102.

Radially outside the impeller 109, an adjustable annular element 113 is further provided within the housing 102, by means of which the fluid flow through the respective outlet opening 106 is adjustable. The adjustable ring element 113 in this case has a plurality of spiral radially from radially inward to radially outwardly extending fluid channels 1 14, which open radially outwardly each in an opening 115 of a plurality of radially outwardly arranged on the ring member 113 openings 115. The fluid channels 114 are open radially inwardly and communicate with the impeller 109 in order to accommodate the fluid flow of the impeller 109 can. The radially inner region of the ring element 113 lies radially outside of the impeller 109, and the ring element 113 receives the impeller 109 in a central recess 116.

Axially between the ring member 113 and the impeller 109 on the one hand and the housing cover 104 of the housing 102 on the other hand, a sealing element 117 is arranged, which is provided as a lid of the ring member 113, which serves as a spiral regulator. This sealing element 117 has a radially extending region 118 and an axial connection 119. The radially extending portion 1 18 covers the ring member 113 laterally at least partially and the nozzle 1 19 engages in the intake opening 105 a.

Radial between the adjustable ring element 113 and the radially outer peripheral wall or annular wall 108 of the housing 2, at least one sealing element 120 is arranged in particular in the region of the respective outlet opening 106. Also a plurality of such sealing elements 120 may be arranged. The sealing element 120 is designed according to the embodiments of FIGS. 1 and 2.

If the ring element 113 rotates in the housing, fluid communication can be achieved by covering at least one of the openings 115 with one of the outlet openings 106, resulting in an outlet-side fluid flow. By the appropriate choice of the positioning of the openings 1 15 and their shape, a targeted control of the outlet can be achieved by rotation of the ring member 113. To adjust the ring element 113, an actuator 140 is provided, for example, a vacuum box to adjust the ring member 113. For this purpose, the actuator 140 has a coupling rod 141, which engages in a guide 142 of the housing 102 and is connected to an arm 143 of the ring element 113. By a

Longitudinal displacement of the coupling rod 141, the ring member 113 is rotated.

Figures 4 and 5 show the pump of Figure 3 in a respective perspective view from the front or from behind. FIG. 4 shows the housing 102 with the suction opening 105 and the actuator 140. FIG. 5 shows the housing 102 with the actuator 140 and with one

Outlet opening 106 and the pulley 199 for driving the impeller.

FIG. 6 shows a view of the pump 1 according to FIG. 1 with the housing 2 with a suction opening 5 and with three outlet openings 6 which are distributed around the circumference of the housing 2. In this case, the outlet openings are arranged at an angle of about 120 ° to each other. They form oval neck, in which the

encircling walls 23 of the sealing elements 20 engage.

FIG. 7 shows a view of the pump 1 according to FIG. 1 with the housing 2 with the housing cover 4 removed, so that the ring element 13 can be seen. The adjustable ring element 13 in this case has a plurality of spiral from radially inward to radially outwardly extending fluid channels 14, which are arranged offset in the circumferential direction to each other. The spiral-shaped fluid channels 14 each have an opening 15 radially on the outside. The fluid channels 14 are open radially inside and communicate with the impeller 9 to record the fluid flow of the pump 9. The radially inner region of the ring element 13 lies radially outside the impeller 9, and the ring element 13 receives the impeller 9 in a central recess 16. FIG. 8 shows a representation of an outlet opening 6 with a peripheral wall section 23 of a sealing element 20 and with the ring element 13 with an opening 15 in the ring element. The opening 15 in the ring member 13 is arranged such that the opening the outlet opening 6 releases about half only. This is due to the adjustment of the ring element 13 in the housing. By twisting the

Ring member 13, the outlet opening 6 can be released more or less.

FIGS. 9 to 12 show various illustrations of the pump with different settings of the ring element 13 in the pump housing 2 relative to the outlet opening 6.

In Figure 9, the outlet port 6 is closed because the opening 15 of the ring member 13 is shifted relative to the outlet 6 so far that the two openings 6, 15 are not aligned and the radially outer wall of the ring member 13, the outlet opening 6 closes.

In Figure 10, the outlet opening 6 is slightly opened because the opening 15 of the ring member 13 is adjusted relative to the outlet opening 6 such that the two openings 6, 15 are aligned with each other slightly and the radially outer wall of the

Ring element 13, the outlet opening 6 almost completely closes, with a small flow area remains free. In Figure 11, the outlet opening 6 is approximately half open, because the opening 15 of the ring member 13 is adjusted relative to the outlet opening 6 such that the two openings 6, 15 are approximately half aligned and the radially outer wall of the ring member 13, the outlet opening 6 about half closes, leaving an approximately half flow area with respect to the maximum flow area.

In FIG. 12, the outlet opening 6 is maximally opened because the opening 15 of the ring element 13 is set relative to the outlet opening 6 in such a way that the two openings 6, 15 are completely aligned with one another. Thus, a maximum half flow cross section for flow is available.

Claims

claims

Pump (1, 101) with a pump housing (2, 102) with a suction port

(5.105) and having a plurality of outlet openings (6,106), with a

Impeller (9, 109), which in the housing (2, 102) rotatably driven

is received to cause a fluid flow from the suction port (5, 105) towards the respective outlet opening (6, 106), wherein radially outside the impeller (9, 109) within the housing (2,102) an adjustable

Ring element (13,113) is provided, by means of which the fluid flow through the respective outlet opening (6,106) is adjustable.

Pump (1, 101) according to claim 1, characterized in that the housing (2, 102) is substantially cylindrical with a first end wall (7, 107) and with a second end wall (7,107) and with a radially outer circumferential wall (8,108), wherein the majority of the outlet openings

(6.106) is arranged on the radially outer circumferential wall (8, 108).

Pump (1, 101) according to claim 2, characterized in that the

Outlet openings (6,106) on the radially outer peripheral wall (8,108) distributed in the circumferential direction and are arranged spaced from each other.

Pump (1, 101) according to one of the preceding claims 2 or 3, characterized in that the suction opening (5, 105) on one of the two

End walls (7, 107) is arranged.

Pump (1, 101) according to one of the preceding claims, characterized

characterized in that by the other of the two end walls (7,107) by a disposed therein opening a drive shaft (11, 111) engages, for driving the impeller.

6. pump (1, 101) according to one of the preceding claims, characterized

characterized in that within the housing (2, 102) a drive means is arranged, by means of which the impeller is drivable.

7. pump (1, 101) according to one of the preceding claims, characterized

characterized in that the adjustable ring element (13,113) has a plurality of spiral radially from radially inwardly extending fluid channels (14,114), each in an opening (15, 115) of a plurality of radially outwardly of the ring member (13,113) arranged openings (15, 115).

8. pump (1, 101) according to claim 7, characterized in that radially between the adjustable ring element (13, 113) and the radially outer

Circumferential wall (8,108) of the housing in the region of the respective outlet opening (6, 106) at least one sealing element (20, 120) is arranged or a plurality of sealing elements (20, 120) are arranged.

9. pump (1, 101) according to claim 8, characterized in that the

Sealing element (20,120) is formed such or the sealing elements (20, 120) are formed such that it has an arcuately curved wall (21, 121) or they have an arcuately curved wall (21, 121) into which an opening (22 , 122), wherein at the opening (22, 122) a radially outwardly projecting circumferential wall section (23, 123) protrudes from the wall (21, 121).

10. pump (1, 101) according to claim 9, characterized in that the

Wall section (23,123) in an outlet opening (6,106) protrudes.

11. Pump (1, 101) according to one of the preceding claims, that the at least one outlet opening (6,106) is surrounded by a nozzle, which protrudes from the radially outer peripheral wall (8, 108) of the housing (2, 102).

12. pump (1, 101) according to any one of the preceding claims, characterized

characterized in that the adjustable ring element (13, 113) by means of an actuator (40, 140) is adjustable in the circumferential direction.

13. Pump (1, 101) according to claim 12, characterized in that the actuator (40, 140) is a pneumatic, hydraulic, magnetic and / or

electromotive actuator is.

14. Pump (1, 101) according to one of the preceding claims, characterized

characterized in that axially between the impeller (9, 109) and adjustable ring element (13,113) on the one hand and an end wall (7,107) of the housing (2, 102) on the other hand, a sealing element (17, 117) is arranged.

15. Pump (1, 101) according to claim 13, characterized in that the

Sealing element (17,117) has a substantially annular disc (18,118) with an opening, of which projects around the opening around an axially projecting nozzle (19,119), which engages in the suction port.