JP5509156B2 - Pump device - Google Patents

Description

  The present invention relates to a pump device incorporated as a part of a factory water supply line or product, for example.

  Conventionally, pump devices have been used for various purposes such as residential water supply, factory water supply, and incorporation into customer assembly products. Most of the pump devices used for factory water supply are operated at a fixed speed of the maximum rotation speed with a commercial power source. Energy saving can be achieved by using a variable speed pump device that operates the pump at a variable speed according to the amount of water demand, but installation of a control panel including an inverter is required to obtain a variable speed pump device.

  For example, Patent Document 1 below discloses a pump device in which an inverter is attached to the outside of a motor unit.

JP 2009-278807 A

  However, when the pump device is incorporated into the factory water supply or customer assembly product, it is incorporated in the middle of the piping, so if the center of gravity of the pump device is biased, a load is applied to the piping. In addition, when replacing the pump device, the pump device is temporarily placed as a single unit, and it is required to be able to stably stand on its own.

  In the technique described in Patent Document 1, the center of gravity is biased by the amount of attaching the control unit to the outside of the motor unit. Self-supporting is possible when the weight of the pump unit and rotating electrical machine unit is sufficiently larger than the control unit, but the control unit also has a considerable weight with respect to the pump unit and rotating electrical machine unit, so it is stable and independent. However, this point is not considered.

  The present invention has been made in view of the above circumstances, and can be attached to equipment piping and a product structure without applying a load.Variable speed operation control such as constant pressure control can be performed by a single pump device. An object of the present invention is to provide a pump device that can stably and independently stand.

  In order to achieve the above object, according to the present invention, in the pump device in which a pump part provided in a pump casing and having an impeller and a rotating electric machine part that rotationally drives the impeller are integrated, the rotating electric machine The part has a housing, and around the housing constitutes an inverter body for supplying drive current to the rotating electrical machine part, a control board for controlling operation of the rotating electrical machine, and a part of the inverter circuit A capacitor is disposed, the housing, the inverter, the control board, and a case that accommodates at least a part of the capacitor, wherein the inverter body and the capacitor are disposed at separate positions. To do.

  With the above configuration, in the pump device in which the rotating electrical machine portion and the control portion are integrated, it is possible to realize a pump device having excellent self-supporting property and balance.

It is an external appearance perspective view which shows the whole structure of the pump apparatus which is one Example of this invention. It is sectional drawing of the pump apparatus shown in FIG. It is an external appearance perspective view which shows one Example of the whole structure of the rotary electric machine assembly for the drive of the pump apparatus which becomes one Example of this invention. It is an expansion | deployment perspective view which shows the whole structure of the rotary electric machine part incorporated in the cover of the rotary electric machine assembly for the drive of the said pump apparatus. FIG. 5 is a developed perspective view showing each part when the rotating electrical machine shown in FIG. 4 is housed in a cover. FIG. 5 is a partially cut perspective view illustrating another example of the positional relationship between a power conversion device attached to a housing and a stator (armature) in the rotating electrical machine assembly. In the said rotary electric machine assembly, it is a perspective view which shows the other example of the core which comprises a stator (armature). It is explanatory drawing of the gravity center of the integrated pump apparatus which has arrange | positioned the power converter device on the outer side of a motor part. It is a figure explaining the ease of falling of the pump apparatus of FIG. It is explanatory drawing of the gravity center of the pump apparatus of this invention. It is a figure explaining the ease of falling of the pump apparatus of this invention. It is a figure explaining the position of the desirable gravity center of the pump apparatus of this invention.

  The details of the embodiment of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows an entire configuration of a longitudinally-directed direct-acting pump, for example, an outdoor-installed pump device according to an embodiment of the present invention.

  In this figure, the code | symbol 1 shows a pump casing and the code | symbol 10 has shown the cover which covers the outer periphery of a rotary electric machine assembly. Reference numeral 20 denotes a cooling cover. Reference numeral 30 denotes a case in which the power converter is accommodated, and reference numeral 40 denotes a noise filter built-in terminal box.

  FIG. 2 shows a cross-sectional view of the pump device. As will be described later, when the centrifugal fan rotates, air is taken in from the outside, passes through the cover, flows between the cooling fins formed on the outer peripheral surface of the housing, and passes through the gap between the end bracket and the end bracket. A casing cover denoted by reference numeral 2 is attached in consideration of the flow of air flowing out to the outside.

  The rotating electrical machine main body is housed inside the cover 10, and a rotating shaft (shaft) 56 of the rotating electrical machine is connected to rotate an impeller disposed in the pump casing. The rotating shaft of the impeller in the pump unit and the rotating shaft of the rotating electrical machine unit coincide with each other. When the pump is used, the rotating shaft is perpendicular to the pump installation surface.

  FIG. 3 shows the overall configuration of the rotating electrical machine assembly used in FIGS. Reference numeral 10 denotes a cover that covers the outer periphery of the rotating electrical machine main body, and has a substantially cylindrical outer shape. The cover 10 is formed into a predetermined shape by, for example, pressing a plate-shaped resonance suppression material. More specifically, noise and vibration can be suppressed by attaching a sound absorbing material, a soundproofing material, a vibration damping material, a vibration damping material, or the like inside the cover.

  A cooling cover 20 containing a centrifugal fan 21 to be described later is attached to one end portion (back side in the drawing) of the cylindrical cover 10 in the axial direction, and the other end portion (front side in the drawing). ) Is attached with an end bracket 11 of a rotating electrical machine described below. Further, on the outer peripheral surface of the cylindrical cover 10, a case 30 (a case for a power conversion device) containing a power conversion device, which will be described later, and a terminal box with a built-in noise filter (a terminal box with a built-in noise filter) 40) are respectively attached.

  Subsequently, in FIG. 4, the entire structure of the rotating electrical machine portion 50 incorporated in the cover 10 is shown as an exploded view. In this example, a permanent magnet type rotating electrical machine is shown as an example. In this figure, reference numeral 51 denotes a so-called substantially cylindrical housing (or also referred to as “frame”), and this housing 51 is made of, for example, a material such as aluminum having excellent heat conductivity (thermal conductivity). It is formed by extruding. In addition, as shown in the figure, the housing 51 has a large number of cooling fins 52L and 52S extending in parallel along a cylindrical rotation axis on the entire outer peripheral surface thereof. In addition, a plane 53 having a relatively large area for mounting the above-described power conversion device (that is, the case for the power conversion device) 30 is formed on a part (the upper portion in the drawing) of the outer peripheral surface of the housing 51. A relatively large (longer extending) cooling fin 52L is formed in the periphery in the horizontal direction.

  Note that an armature constituting the stator (stator) 54 of the permanent magnet type rotating electric machine is inserted and fixed in the cylindrical housing 51, and the cylindrical inner space of the armature 54 is inserted. Inside, a rotor (rotor) 55 configured by arranging a plurality of permanent magnets in a cylindrical shape is inserted, and is attached rotatably through a predetermined gap. Reference numeral 56 in the figure denotes a rotating shaft (shaft) that is formed integrally with the rotor (rotor) 55, and the rotational driving force of the rotating electrical machine is driven through the shaft, for example, by a pump or the like. Communicate to equipment. Reference numeral 57 in the figure is an end bracket attached to the end of the housing 51 on the side opposite to the end bracket 11 described above, and reference numeral 58 in the figure is outside the end bracket 57. The centrifugal fan attached to the said rotating shaft (shaft) 56 is shown.

  Further, FIG. 5 is an exploded view showing each part when the rotating electrical machine 50 described above is housed in the cover 10 shown in FIG. That is, the rotating electrical machine 50 has a substantially arc-shaped outer cross section in a part of the outer peripheral surface of the housing 51, for example, in a part where the relatively short cooling fins 52 are formed around the lower part in the illustrated example. The formed control & I / F board case 60 and smoothing capacitor case 70 are attached (or fixed), and then inserted into the cover 10 (see arrows in the figure). Further, the electric power provided in part on the flat surface 53 of the housing 51 is partly provided with a power switching element (for example, IGBT) which is a heating element constituting the inverter through an opening 511 provided in a part of the cover 10. The conversion device 31 is attached to a flat surface 53 formed on a part of the housing 51 of the rotating electrical machine 50, and then a cover (cover for power conversion device) 30 for protection is attached from the outside (see the arrow in the figure). reference). Further, the above-described terminal box (noise filter built-in terminal box) 40 is attached to a part of the outer peripheral surface of the housing 51 (see the arrow in the figure). And the cooling cover 20 mentioned above is attached to the other edge part (left end of a figure) of the housing 51. FIG. Further, reference numeral 21 in the figure indicates a small hole for taking in external air, which is formed in a large number of mesh shapes in the substantially central portion of the wall surface of the cooling cover 20.

  That is, according to the rotating electrical machine assembly including the rotating electrical machine main body and the peripheral devices described above, the centrifugal fan 58 attached to the tip of the rotating shaft (shaft) 56 that rotates with the operation of the rotating electrical machine is provided. Rotating, air from outside is guided to the inside of the cover 10 and flows between the cooling fins 52 formed on the outer peripheral surface of the housing 51 to exchange heat (see the white arrow in FIG. 4). Then, it flows out through the gap between the end bracket 11 at the other end. That is, the air flow generated by the rotation of the centrifugal fan 58 cools the housing 51 in which many cooling fins 52 are formed on the outer peripheral surface thereof.

  In addition, since the power converter device 31 comprises an inverter as mentioned above, since the power switching element which is a heat generating element is provided in the inside, the emitted-heat amount is large. However, according to the present invention, as described above, the power converter 31 is a part of the housing 51 provided integrally on the outer periphery of the stator (stator) 54 in order to discharge the heat generated by the rotating electrical machine to the outside, that is, , And directly attached to the mounting plane portion 53. According to this, the heat generated in the power converter 31 is transmitted to the housing 51 together with the heat generated by the rotating electrical machine (particularly, the heat generated by the armature), and the entire outer peripheral surface is made of a material having excellent heat conductivity. The cooling fins 52 formed so that a large number are arranged in parallel are efficiently transmitted to the outside air. That is, together with the heat generated by the rotating electrical machine, the heat generated by the power conversion device 31 can be efficiently discharged to the outside, thereby achieving a good cooling effect of the power conversion device.

  In particular, in the above-described embodiment, the cooling fins 52 that are relatively large (extend long) in the horizontal direction are disposed around the mounting plane 53 formed on the upper portion of the cylindrical housing 51 in which the power conversion device 31 is disposed. Therefore, it is possible to efficiently cool the heat generated by the electric power converter 31 together with the heat generated by the rotating electrical machine.

  Further, as described above, according to the present invention, the control & I / F board case 60 and the capacitor case 70 are also attached (fixed) to a part of the outer peripheral surface of the housing 51. Heat generated inside these cases can also be efficiently discharged to the outside through the cooling fins 52 formed on the outer periphery of the housing 51 in the same manner as described above.

  The control & I / F board case 60 includes a control controller (for example, a control microcomputer) and a communication I / F board inside, and a resin material or the like is injected into the case. It has excellent environmental resistance and impact resistance. Then, by attaching the control & I / F board case 60 to a part of the rotating electrical machine, it is possible to perform a wireless / wired communication function with the outside as well as drive control of the outdoor installation pump. In addition, according to this, for example, by mounting a pressure sensor, a flow rate sensor, etc. on the control & I / F board, these amounts can be automatically controlled as a feedback signal. By transmitting (communication), centralized management, an integrated energy saving monitor system, and the like can be realized. In other words, this makes it possible to perform operation management and energy-saving operation of an outdoor installation pump, and to realize remote monitoring control and centralized management, and further, systemization by a plurality of pumps.

  Further, the capacitor case 70 contains therein a smoothing capacitor that constitutes a part (component) of the inverter circuit of the power converter 31. Similarly to the above, a resin material or the like is contained therein. By injecting, environmental resistance and impact resistance are achieved. Moreover, although the DC reactor which comprises a part of inverter was demonstrated as what was integrated in a part of the said power converter device 31 in this example, this DC reactor is similarly incorporated in an exclusive case. Then, it may be attached to a part of the outer peripheral surface of the housing 51.

  In addition, in the present invention, instead of the above-described embodiment, for example, as shown in FIG. 6, the heat generating portion (mesh portion in the figure) H in the power converter 31 is a flat portion of the cylindrical housing 51. 53, on the rotation center axis thereof, deviates from the position of the central portion (indicated by the broken line B in the figure) of the stator (armature) 54 that is the heat generating portion on the rotating electrical machine side, and is incorporated in the cooling cover 20, for example. It arrange | positions so that it may be located close to the centrifugal fan 21 side made. According to this, efficient cooling can be achieved by dispersing the heat generating parts without concentrating.

  Furthermore, as shown in FIG. 7, the stator (armature) 54 is cut out at a part of the outer periphery thereof, in particular, a portion close to the flat portion of the housing 51 to which the power conversion device 30 described above is attached ( A cut portion 541), a so-called cut core, can also be employed. According to this, the power converter 30 and the stator (armature) 54, which are heat generating parts, are thermally separated at the cut portions, whereby the absorption of heat by the housing 51 is separated and cooled efficiently. It becomes possible.

  Next, the balance and the self-supporting stability of the pump device of the present invention will be described with reference to the schematic diagrams of FIGS.

  FIG. 8 is an explanatory diagram (schematic diagram) of the position of the center of gravity when a power conversion device including an inverter is installed in a pump device integrated with a conventional rotating electrical machine assembly (motor unit). In FIG. 8, the power converters are collectively arranged outside the motor part integrated with the pump part. In this case, the weight of the power conversion device is large, and the position of the center of gravity combining the power conversion device and the motor unit greatly deviates from the rotating shaft of the rotating electrical machine (motor) as shown in the lower part of FIG.

  In such a state, even if the entire pump device is slightly inclined as shown in FIG. 9, the center of gravity is located away from the rotation axis of the motor unit, so it falls down immediately, and the balance property It can be seen that the self-supporting stability is not sufficient. It can be seen that when such a pump device is incorporated in the middle of the piping, a large load is applied to other piping parts.

  FIG. 10 is an explanatory diagram (schematic diagram) showing the center of gravity of the pump device of the present invention. In the present invention, unlike FIG. 8, the power converter, the control board, and the smoothing capacitor are arranged apart from each other so that at least a part thereof is housed in the cover of the rotating electrical machine assembly.

  Specifically, as shown in FIG. 5, the power conversion device 31 is arranged at the upper part of the housing 51, the capacitor case 70 is located at the back of the lower part of the housing 51, and the control & I / F board case 60 is located at the lower part of the housing 51. Place in front of. Each member is approximately 120 ° apart from the rotation axis of the rotating electrical machine.

  In the present invention, especially considering that the weight of the power converter 31 and the smoothing capacitor is larger than the weight of the control & I / F board 60, at least the power converter and the smoothing capacitor are separated from the rotating shaft of the rotating electrical machine. It is necessary to arrange at a position (for example, 120 ° to 180 °).

  On the other hand, since the weight of the noise filter is relatively small with respect to the power converter, the noise filter case 40 is disposed outside the cover 10, but the influence on the position of the center of gravity of the pump device. Is small.

  Thereby, as shown in the lower part of FIG. 10, the center of gravity of the motor unit and the respective power converters, the control board, the condenser, and the pump unit is in the vicinity of the rotation axis of the motor unit.

  As shown in FIG. 11, in the pump device of the present invention, since the center of gravity is in the vicinity of the rotating shaft of the motor unit, the pump does not fall even if tilted to some extent, and balance and self-supporting stability can be ensured. it can. Thereby, when the pump apparatus of this invention is installed in the middle of piping, it can install stably, without applying big load to piping or another site | part. Moreover, since the pump device of the present invention is excellent in self-supporting property even during installation work, it is possible to prevent damage to the pump device or other members due to the fall of the pump, and excellent workability.

  FIG. 12 shows a region of a desirable position of the center of gravity of the entire pump device. Since the position of the center of gravity is less likely to fall as it is closer to the center axis, it is set to be near the center axis. In particular, the rotation axis of the impeller in the pump unit and the rotation axis of the rotating electrical machine unit are coincident and may be within a range of ½ of the diameter of the motor unit with the rotation axis of the motor unit and the pump unit as the center. This is desirable.

  Further, since the lower center of gravity is more difficult to fall, as shown in the shaded portion in FIG. 12, the center point of the upper bottom surface of the cylindrical portion of the housing of the motor portion is the top, and the diameter of the lower bottom surface of the motor portion is 1 / The inside of the cone defined by the circle of two is desirable. Here, the diameter of the motor part means the maximum diameter of the motor part covered by the cover.

  In the above embodiment, the rotating electrical machine assembly for driving the outdoor-installed pump has been described as being constituted by a permanent magnet type rotating electrical machine. However, the present invention is not limited to this, and other types of rotating electrical machines are used. It will be apparent to those skilled in the art that the same effect may be obtained by the configuration. Further, in the above embodiment, the cover 10 is described as being formed so as to substantially cover the entire rotating electrical machine portion 50. However, the present invention is not limited to this, and for example, The cover 10 may have the rotating electrical machine portion 50 approximately half the length thereof, and in this case, the same effect as described above will be obtained.

  DESCRIPTION OF SYMBOLS 1 ... Pump casing, 2 ... Casing cover, 10 ... Cover, 20 ... Cooling cover, 21 ... Centrifugal fan, 30 ... Case for power converters, 31 ... Power converter, 40 ... Terminal box with built-in noise filter, 50 ... Rotating electric machine (Parts), 51 ... housing, 52L, 52S ... cooling fins, 54 ... stator (stator, armature), 55 ... rotor (rotor), 56 ... rotating shaft (shaft), 60 ... for control & I / F board Case: 70: Case for smoothing capacitor, 541: Cut portion of (core), H: Heat generating portion, B: Center portion of armature

Claims (7)

In a pump device in which a pump unit provided in a pump casing and having an impeller and a rotating electrical machine unit that rotationally drives the impeller are integrated, the rotating electrical machine unit has a housing formed of a cylindrical portion. An inverter body for supplying a drive current to the rotating electrical machine unit, a control board for controlling the operation of the rotating electrical machine unit, and a capacitor constituting a part of the inverter circuit are provided around the housing. The housing, the inverter, the control board, and a case that houses at least a part of the capacitor, and the rotation axis of the impeller in the pump unit and the rotation axis of the rotating electrical machine unit coincide with each other. The pump device is characterized in that the center of gravity of the pump device is within a range of ½ of the diameter of the rotating electrical machine part around the rotation axis. In a pump device in which a pump unit provided in a pump casing and having an impeller and a rotating electrical machine unit that rotationally drives the impeller are integrated, the rotating electrical machine unit has a housing formed of a cylindrical portion. An inverter body for supplying a drive current to the rotating electrical machine unit, a control board for controlling the operation of the rotating electrical machine unit, and a capacitor constituting a part of the inverter circuit are provided around the housing. The housing, the inverter, the control board, and a case that houses at least a part of the capacitor, and the rotation axis of the impeller in the pump unit and the rotation axis of the rotating electrical machine unit coincide with each other. The center of gravity of the pump device is a half of the diameter of the rotating electrical machine part, with the center point of the upper bottom surface of the cylindrical portion of the housing of the rotating electrical machine part as a vertex. Pump apparatus, characterized in that in the conical interior defined by a circle. 3. The pump device according to claim 1, wherein when the pump is used, the rotation shaft is perpendicular to the pump installation surface. Around the housing, the pump device according to claim 1, wherein in that a reactor. Around the housing, the pump device according to claim 1 or 2, characterized in that a noise filter. Pump device according to claim 1 or 2, characterized in that a pressure sensor in the pump casing. 3. The pump device according to claim 1, wherein the inverter main body, the capacitor, and the control board are arranged at positions separated from each other around a rotation axis of the rotating electrical machine unit .

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