JP2010508462A - Method and apparatus for exhausting heat from components of a liquid pump - Google Patents

Abstract

  The invention relates to a method for the discharge of heat from a component of a liquid pump, the casing of the liquid pump comprising a suction side S with an inlet Z for the medium to be pumped and an outlet for the medium The suction port side D communicates with the part, and the suction port side S and the discharge port side D are connected to each other via a drivable impeller (4). In accordance with the present invention, a part of the medium is diverted in the region of the flow-through section II on the discharge port side D and guided to the component part (3) by the passage (2). The passage (2) is thermally connected to the component (3). The diverted part of the medium is at least partly vaporized in the region of the component part (3), so that heat is discharged from the component part (3) by evaporative cooling. The invention further relates to a device for carrying out the method and to a method of using the device as a cooling device for exhausting heat from a component (3) of a cooling water pump of an automobile.

Description

  The present invention relates to a method for exhausting heat from a component of a liquid pump, a device for carrying out the method and the use of the device.

  German Offenlegungsschrift 10347302 A1 discloses a two-part spiral casing for a spiral pump, which is optimally configured in terms of fluid technology. The centrifugal pump is generally driven by an electric motor, the stator of the electric motor is disposed in a dry space, the rotor is rotatably disposed in the wet space, and the periphery of the wet space is It is washed by a flowing medium (fluid medium) to be pumped. In liquid pumps, it is generally necessary to exhaust heat from components that are heated during operation. Although a suitable cooling device is provided for this purpose, this cooling device is disadvantageous because it increases the space required for the fluid pump.

  The object of the present invention is to provide a novel method for exhausting heat of components of a liquid pump in a small space. It is a further object of the present invention to provide an apparatus for carrying out the method as well as the appropriate use of the apparatus.

  In order to solve the above-mentioned problems, in the present invention, in a method for exhausting heat from a component part of a liquid pump, the liquid pump has a suction port side provided with an inflow part for a medium to be pumped in a casing. And a discharge port side leading to an outflow portion for the medium to be pumped, in which case the suction port side and the discharge port side are connected to each other via a driveable impeller. A portion of the medium is diverted in the region of the flow-through cross section on the outlet side, and is guided to the component by at least one passage thermally connected to the component; The part that has been diverted is at least partially vaporized or evaporated in the region of the component, and heat is discharged from the component by vaporization cooling. The medium to be pumped flowing in the pump is a liquid or a mixture of liquids. As the liquid pump, an axial pump or an axial flow pump can be used. The discharge side that is separated from the suction side by an impeller in terms of fluid technology, that is, the discharge side (discharge region) connected to the suction side (suction region) via the impeller in the flow direction It is connected to the downstream side of the impeller as viewed. The flow in the passage is maintained by a medium that is partially vaporized and flowing. For many purposes of use (examples of use) it is sufficient to provide a single passage that is thermally connected to the component. The thermal connection (thermal connection) of the passage with the component part means that the passage is arranged in the region of the component part as follows, i.e. arranged for heat exchange in the region, in other words the component part Is disposed (connected) so as to receive heat from the component. By means of the above-described means of the present invention, the heat generated in the constituent parts can be easily discharged on the basis of evaporative cooling, and in this case, an additional large constituent space is almost unnecessary, because at least This is because it is only necessary to provide a small space for one passage. The small space required for the passage that diverts (branches) a portion of the medium flowing through the liquid pump is of little concern for the total required space of the liquid pump. The passage is formed and implemented in various structures. For example, the passage may be formed as a space defined in an annular shape along the periphery of an electric motor that is incorporated in the liquid pump and drives the liquid pump. The passage is configured such that the heat is discharged by evaporative cooling in the vicinity of the component. It is advantageous to eliminate the need for additional refrigerant.

In an advantageous embodiment of the invention, the heat removal is effected by evaporative cooling in components arranged as electronic components for the operation of the liquid pump.
The liquid pump is generally driven by an electric motor, and the electric motor includes electronic components necessary for operation and control of the electric motor, and the electronic components are It generates heat during operation. The method according to the invention releases heat directly from an electronic component into a diverted part of the medium, the diverted part continuously flowing in the liquid passage, Is partially evaporated or vaporized by the heat of a typical component. The evaporative cooling that occurs in this case is very effective in protecting electronic components.

  In an embodiment of the invention, the inflow and outflow (feeding and unloading) of the part of the medium to be pumped takes place at least partly in convection in at least one passage. Convection of the diverted portion of the medium means flows that are opposite to each other in the passage, that is, flows that flow toward and back from the electronic component within the passage. In one flow direction, the diverted part of the medium is fed and conveyed to the component to be cooled, and in the other flow direction, the diverted part of the medium is continuously conveyed from the component, i.e. returned and conveyed. Then, it reaches the discharge side of the liquid pump again. Based on such an action, the present invention is implemented using a passage formed as a conduit, so that the required space is minimized.

  In another embodiment of the present invention, heat is discharged from the components of the spiral pump arranged as a liquid pump by evaporative cooling, and in this case, the region of the flow-through section on the discharge port side D Thus, a part of the medium to be pumped is diverted from a spiral casing arranged as a casing. Centrifugal pumps are used as fluid pumps for many purposes. Since the flow cross section (transverse section) in the spiral casing continuously increases from the impeller toward the outflow portion of the medium, a continuous pressure difference occurs between the different flow sections in the spiral casing. ing. Based on this fact, the method of the present invention can be easily implemented by simply arranging at least one passage.

  An apparatus for carrying out the method of the invention comprises, in the configuration of the invention, a casing of a liquid pump, the casing side of the inlet with an inlet for the medium to be pumped and the pumping A discharge port side leading to an outflow portion for the medium to be operated, the suction port side and the discharge port side are connected to each other via a driveable impeller, and the casing is At least one opening for a portion of the medium to be pumped or at least a portion of the medium to be pumped at least in the region of the flow cross section on the outlet side Having one opening (inflow opening) and another at least one opening (outflow opening) for the portion of the medium, wherein the at least one opening is or at least One of the opening and the further at least one opening is connected to at least one closed path, the passageway is at least partially said component thermally connected. The discharge side connected to the suction side via the impeller is connected to the downstream side of the impeller as viewed in the flow direction. For many purposes of use, one opening (inflow opening or discharge side opening or high pressure side opening) for a part of the medium to be diverted and another opening (outflow opening if necessary) It is sufficient to provide a suction-side opening or a low-pressure-side opening, which is connected to the only closed passage. A closed passage means a passage that is closed at the periphery, except for a connection with an opening for a portion of the medium to be diverted. By connecting the passage directly to the casing, very little space is required for evaporative cooling.

  In an embodiment of the invention, the casing has only one opening in the region of the flow-through section on the discharge side which is used for inflow and outflow of a part of the medium. In a preferred embodiment, the passage is formed in the form of a structurally unique conduit, which minimizes the space required.

  In another embodiment of the invention, the casing is a spiral casing of a spiral pump. Centrifugal pumps are used as liquid pumps or fluid pumps for many purposes because of their compact structure. The use of a spiral casing of a spiral pump as the casing is particularly advantageous for many purposes of use.

  In another embodiment of the invention, at least one passage for the diverted part of the medium is arranged in a casing part surrounding an electric motor for driving the centrifugal pump. In this case, in order to discharge the heat accumulated in the components by evaporative cooling, it is advantageous that no additional space is required outside the centrifugal pump.

  Furthermore, according to the invention, the device for exhausting heat from the components of the pump is used as a cooling device for exhausting heat from the components of the cooling water pump of the automobile. Due to the method of use according to the present invention, the function of the cooling water pump of an automobile is ensured satisfactorily over a long period of time, because damage or failure of electronic components is not This is because it can be avoided by discharging. In other words, it is extremely advantageous to use the fluid pump according to the present invention as a cooling water pump for automobiles.

  Next, the present invention will be described in detail based on the illustrated embodiment (FIGS. 1 and 2).

FIG. 3 is a longitudinal sectional view of a liquid pump having two openings, that is, one inflow opening and one outflow opening. It is a longitudinal cross-sectional view of a liquid pump provided with one opening part used for inflow and an outflow.

  FIG. 1 shows a longitudinal section of a centrifugal pump used as a liquid pump. The liquid pump comprises a component 3 that is heated during operation, and the heat of the component must be continuously discharged during operation. The liquid pump has in the casing 1 a suction port side S with an inlet for a medium to be pumped and a discharge port side D leading to an outlet for a medium to be pumped, in this case The suction port side S and the discharge port side D are connected to each other via an impeller 4 that can be driven so that the medium is discharged from the suction port side to the discharge port side. In the method for exhausting heat from the component part 3 of the liquid pump, a part of the medium to be pumped is diverted in the region of the flow-through section II on the outlet side D and configured via at least one passage 2. It is guided toward part 3. The passage 2 is thermally connected to the component 3. The flow-through section II for diverting a part of the medium to be pumped (conveyed) is selected based on hydrodynamics. Generally, the discharge port side D has different flow cross sections. That is, the flow section II is formed larger than the flow section I. The pressure generated in the discharge port side D is higher where the flow cross section is larger than where the flow cross section is small. A part of the medium to be pumped is at least partially vaporized in the region of the component 3. In this way, an effective evaporative cooling action is produced, and the heat accumulated in the component part 3 is discharged by the evaporative cooling action. In the embodiment shown in FIG. 1, the heat is discharged based on evaporative cooling in the component 3 provided as an electronic component for the operation of the liquid pump. In this case, in the embodiment shown in FIG. 1, a part of the medium to be pumped flows in through the one opening 1a in the region of the flow passage section II having the larger area, and passes through another opening 1b. The openings are connected to each other by a closed passage 2. In this case, the branched part of the medium to be pumped flows in one flow direction in the regions of the openings 1a and 1b. A portion of the medium to be pumped that is diverted from the opening 1 a into the passage 2 flows in a convection in a portion of the passage 2 that is located in the region of the component 3, and such a flow Maintained by partial vaporization of the medium. The structural configuration of the openings 1a and 1b is variously implemented according to the customer's desired configuration conditions. The opening for the part of the medium to be diverted is formed by a suitable component (or component), for example using a collision plate or baffle plate or a turning member. Such components are used to optimally produce the flow indicated by the dashed arrows in the passage 2. The passage 2 is advantageously arranged in a casing part 5 which encloses an electric motor 6 for driving the liquid pump, in the embodiment for driving the spiral pump. As is apparent from FIG. 1, no additional configuration space is required outside the liquid pump for carrying out the method for exhausting heat from the component 3 of the liquid pump. In this case, the discharge of heat is particularly advantageous because it is effected by a part of the medium flowing into the liquid pump in the direction of the arrow through the inlet Z. No additional refrigerant is required.

  FIG. 2 shows a liquid pump according to another embodiment in a longitudinal section. Unlike the liquid pump of FIG. 1, the liquid pump also formed as a spiral pump has only one opening 1a in the region of the flow-through section II, and this opening is a part of the medium to be pumped. Are used as an inflow opening and an outflow opening. Particularly advantageously in this case, the passage 2 is formed as a conduit, and the supply and unloading of a part of the medium in the passage 2 takes place by convection as indicated by the dashed arrows. Again, the flow in the passage 2 is maintained solely on the basis of the vaporization of a part of the medium in the component 3. The passage 2 is implemented by various structural configurations. The passage is always engineered to produce evaporative cooling in the region of component 3. This is advantageous when the fluid pump is arranged in a vehicle as a cooling water pump.

  DESCRIPTION OF SYMBOLS 1 Casing, 1a, 1b Opening part, 2 Passage | path, 3 Component part, 4 Impeller, 5 Casing part, 6 Electric motor

Claims (9)

  In the method for exhausting heat from the component (3) of the liquid pump, the liquid pump pumps into the casing (1) the inlet side S with the inlet Z for the medium to be pumped and the pump A discharge port side D leading to an outflow part for the power medium, and the suction port side S and the discharge port side D are connected to each other via a drivable impeller (4). In the region of the flow-through section II on the discharge port side D, a part of the medium is divided, and the structure is constituted by at least one passage (2) thermally connected to the component (3). Leading to the part (3), the part of the medium diverted is at least partially vaporized in the region of the component (3) and heat is discharged from the component (3) by evaporative cooling. For exhausting heat from the components of the liquid pump Law.   2. The method according to claim 1, wherein the heat removal by evaporative cooling takes place in a component (3) arranged as an electronic component for the operation of the liquid pump.   3. A method according to claim 1 or 2, wherein the inflow and outflow of a part of the medium to be pumped is carried out on the basis of convection by means of at least one passage (2).   Heat is discharged from the component part (3) of the centrifugal pump arranged as a liquid pump by evaporative cooling, and a part of the medium to be pumped in the region of the flow passage section II on the discharge port side D is transferred to the casing (1 4. A method according to any one of claims 1 to 3, wherein the flow is diverted from a spiral casing arranged as).   5. A device for carrying out the method according to claim 1, wherein the device comprises a casing (1) for the liquid pump, the casing being an inlet for the medium to be pumped. A suction port side S with Z and a discharge port side D leading to the outflow part for the medium to be pumped, the suction port side S and the discharge port side D being drivable Connected to one another via an impeller (4), the casing (1) has at least one opening (1a) for the part to be diverted of the medium to be pumped in the region of the flow-through section II. And optionally further at least one opening (1b) for the part of the medium, in which case the at least one opening (1a) and optionally Said at least one other opening (1b) Is connected to at least one closed passage (2), which passage is at least partly thermally connected to the component (3), from the component part of the liquid pump, characterized in that Device for discharging.   6. Device according to claim 5, wherein the casing (1) has only one opening (1a) in the region of the flow-through section II, which is used for inflow and outflow of the part of the medium.   The device according to claim 5 or 6, wherein the casing (1) is a spiral casing of a spiral pump.   8. The device according to claim 7, wherein the at least one passage (2) is arranged in a casing part (5) surrounding an electric motor (6) for driving a centrifugal pump.   9. A method of using a device according to any one of claims 5 to 8, wherein the device according to any one of claims 5 to 8 is heated from a component (3) of a cooling water pump of an automobile. A method of using a device, characterized in that it is used as a cooling device for discharging water.

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