JPH06241199A - Land based pump - Google Patents

Abstract

PURPOSE:To save an installation space and prevent leakage of operation noises to outside by providing a specified number of flow passages made of thermal conductive material so as to penetrate a stator iron core in the axial direction of a motor shaft, and connecting one end of each flow passage to an inflow or outflow port of a pump part. CONSTITUTION:A motor part 1m wherein a rotor iron core 5 is fixed to a motor shaft 1 and a stator iron core 7 which surrounds the rotor iron core 5 with a specified gap is fixed to motor casings 3, 4, 9, is operated for driving a pump part 1p. Fluid flowing into an inflow port 3hb of the pump part 1p is sent out from an outflow port 19h of the pump part 1p. A specified number of flow passage made of thermal conductive material are formed so as to penetrate the stator iron core 7 in an axial direction of the motor shaft 1. One end of each flow passage is connected to the inflow port 3hb or the outflow port 19h of the pump part 1p. The motor shaft and a pump shaft are coaxially arranged. An intermediate wall 3 shaped by the motor casings 3, 4, 9 and pump casing 3, 19, 23 are water-tightly formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a land pump which operates a pump section by a motor section and sends out a liquid flowing into an inlet of the pump section from an outlet of the pump section.

[0002]

2. Description of the Related Art In a conventional land pump as described above, a motor section and a pump section are exposed in the air. When electric power is supplied to the motor part of the land pump to operate it, the rotary vanes of the pump part rotate, so that the pump part pumps the liquid flowing into the inflow port by the rotary vane and sends it out from the outflow port. The heat released by the operation of the motor unit is dissipated to the atmosphere around the motor unit.

[0003]

Since the conventional land pump is of the air-cooled type as described above, the motor casing is made of a good heat conductor in order to efficiently dissipate the heat released by the operation of the motor section. In addition, the motor casing is provided with cooling fins, and the motor casing is provided with a large number of ventilation holes for heat radiation. Therefore, it is necessary to secure a space for heat radiation for circulating the air around the land pump to dissipate the heat of the motor unit, which increases the installation space and makes it impossible to effectively use the space. Also, in order to shield the operating noise of the motor from leaking to the outside, even if you try to cover the land pump with a soundproof box, for example, heat will be accumulated in the soundproof box and the space for heat dissipation described above will be secured. Considering that it must be done, it is difficult to provide a compact and effective soundproofing measure.

The present invention has been made in order to eliminate the above-mentioned inconvenience, and has a small installation space, the space can be effectively used, and a compact and effective soundproofing measure can be easily provided. The present invention also provides a land pump that can be formed into a rod shape and can be housed in a wall or the like.

[0005]

A land pump according to the present invention is provided with a predetermined number of flow passages made of a good heat conductor that penetrates a stator core in the axial direction of a motor shaft, and one end of the flow passage is connected to a pump portion. It is connected to the inlet or outlet. Then, the motor shaft and the pump shaft are arranged on the same axis so that the intermediate wall shared by the motor casing and the pump casing is watertight.

[0006]

In the land pump according to the present invention, the liquid flowing in the flow path serves as a heat transfer medium, and the liquid transfers and releases the heat from the motor section.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing the structure of a land pump according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1, and FIG. 1 is equivalent to a cross-section taken along the line BB of FIG. To do. 1 and 2, the lower side is configured symmetrically with the upper side. The intermediate wall and the motor end wall have substantially the same structure.

1 and 2, reference numeral 1 denotes a shaft, which is a motor shaft portion 1m and a pump shaft portion 1.
p is formed in a single shape. 2 is a bearing,
It is attached to both ends of the motor shaft portion 1m. Reference numeral 3 denotes an intermediate wall through which the shaft 1 penetrates, which is made of a good thermal conductor, plastic, or a composite material, and which supports the shaft 1 via a bearing 2, and which allows air to circulate and wires to be inserted. Vent 3ha
And an inflow port 3hb into which the liquid flows, the vent holes 3ha and the inflow ports 3hb are provided in the circumferential direction, in this case, 16 places alternately.

Reference numeral 4 denotes a motor end wall facing the intermediate wall 3, which is made of a good heat conductor, plastic, or composite material, and which supports one end of the shaft 1 via a bearing 2 and has a motor end wall portion 4a. A seal packing 4b that contacts the outer surface of the motor end wall 4a, and a closing plate 4c that contacts the motor end wall 4a via the seal packing 4b;
The seal packing 4b and the closing plate 4c are connected to the motor end wall portion 4
It is composed of a bolt 4d fixed to a. The motor end wall portion 4a has a ventilation hole 4ah in the circumferential direction for allowing air to flow therethrough and a wire to be inserted therethrough.
It is provided individually.

Reference numeral 5 denotes a rotor core fixed to the motor shaft portion 1 m, 6 denotes an end ring fan formed on the rotor core 5, 7 denotes a stator core surrounding the rotor core 5 with a predetermined gap, 8 Indicates a stator winding wound around the stator core 7. Reference numeral 9 denotes a motor cylinder, which is made of a good heat conductor, has a stator core 7 fixed therein, and both open ends are closed by an intermediate wall 3 and a motor end wall 4. The motor casing is composed of the intermediate wall 3, the motor end wall 4, and the motor cylinder 9.

Reference numeral 10 denotes a flow channel cylinder made of a good heat conductor,
While contacting the stator core 7 so as not to contact the stator winding 8, the stator core 7 is pierced in parallel with the motor shaft portion 1m while the flange portion at the open end is connected to the inlet 3hb via the seal packing 11. The nut 12 that engages with the intermediate wall 3 around the periphery and is screwed to the open other end abuts the motor end wall portion 4a via the seal packing 13, so that the intermediate wall 3 and the motor end wall portion 4a are connected to each other. It is fixed.
The flow channel cylinder 10 is arranged on both walls 3 and 4 so as to be located between the ventilation holes 3h and 4ah in the circumferential direction.

Reference numeral 14 denotes a seal packing, which is in contact with the outer edge of the outer surface of the motor end wall portion 4a. Reference numeral 15 denotes a flow path end wall, and a water inlet 15h that is in contact with the motor end wall portion 4a via the seal packing 14 and is connected to the water inlet pipe Ti is formed on the extension line of the shaft 1 and is connected to the flow channel cylinder 10. It is in communication. Reference numeral 16 denotes a bolt, one end of which penetrates the flow path end wall 15, the seal packing 14, and the motor end wall portion 4a is screwed into the intermediate wall 3 and is screwed to the other end protruding from the flow path end wall 15. Comes into contact with the flow path end wall 15 through a washer or the like,
The intermediate wall 3, the motor end wall 4, and the flow path end wall 15 are fixed via the motor cylinder 9.

Reference numeral 18 denotes a mechanical seal for making the pump shaft portion 1p and the intermediate wall 3 watertight. 1
Reference numeral 9 denotes a pump end wall facing the intermediate wall 3, and the water outlet pipe To
A water outlet 19h is formed on the extension line of the shaft 1 as an outflow port to which is connected. Reference numeral 20 denotes a pump rotary vane, into which the pump shaft portion 1p is inserted,
It is fixed by a nut 21 screwed to the other end.

Reference numerals 22A and 22B denote pump guide blades, and 23 denotes a pump cylinder into which the pump guide blades 22A and 22B are fitted. The open ends of the pump cylinder 23 are separated by a seal packing 24 to form an intermediate wall 3 and a pump end wall. It is in contact with 19 and is closed. The pump casing is composed of the intermediate wall 3, the pump end wall 19 and the pump cylinder 23.

Reference numeral 25 denotes a bolt, one end of which penetrates the pump end wall 19 is screwed into the intermediate wall 3, and a nut 26 which is screwed into the other end protruding from the pump end wall 19 is provided with a washer or the like on the pump end wall 19. And the intermediate wall 3 and the pump end wall 19 are fixed via the pump cylinder 23. M indicates a motor unit and P indicates a pump unit.

Next, the operation will be described. First, when the stator winding 8 of the motor section M is energized to rotate the rotor core 5 and the motor shaft section 1m, the pump shaft section 1p also rotates, so the pump rotary blade 20 also rotates.
Then, when the pump rotary blade 20 rotates, the water inlet pipe Ti
Water as a liquid flowing into the water inlet 15h from the water passes through the flow pipe 10, enters the pump portion P from the inflow port 3hb, and flows out from the water outlet 19h to the water outlet pipe To.

When electric power is supplied to the motor unit M to operate it as described above, heat is generated when electric energy is converted into kinetic energy. This heat is passed through the stator core 7 and the flow passage cylinder 10. Is conducted by being conducted to the water flowing through the flow channel cylinder 10, is radiated, and is radiated to the outside of the motor unit M by the air flowing in and out through the ventilation holes 3ha and 4ah.

Therefore, the heat of the motor M can be effectively dissipated without taking special cooling measures, so that it is not necessary to provide a heat dissipating space around the motor M, so that the installation space is reduced and the space is reduced. It can be used effectively. In addition, since it is not necessary to secure a space for heat dissipation in the surroundings, it can be housed in, for example, a compact soundproof box to prevent operating noise from leaking to the outside, so a compact and effective soundproofing measure can be taken. It can be applied easily. Further, the installation space is small, and the water inlet 15h and the water outlet 19h are arranged on the extension line of the shaft 1, so that they can be made into a rod shape, that is, thin, so that they can be housed in a compact box,
Can be housed in a wall, etc. It should be noted that dew condensation does not occur in the motor section M.

In the above embodiment, the wiring of the motor section M may be inserted into any of the ventilation holes 3ha and 4ah, and water may flow in the opposite direction. Further, although the motor end wall 4 is configured to be watertight and water is also flown to the outer surface of the motor end wall 4, the water inlet pipe T is directly connected to the flow pipe 10.
You may connect i or the water outlet To.

[0020]

As described above, according to the present invention, the stator core is provided with a predetermined number of flow passages formed of a good thermal conductor that penetrates the stator core in the axial direction of the motor shaft, and one end of the flow passage is connected to the flow of the pump portion. Since it is connected to the inlet or the outlet, the heat generated in the motor section is conducted to the liquid flowing through the flow path through the stator core and the flow path, is conveyed, and is discharged. Therefore, it is possible to effectively dissipate the heat of the motor section without taking special cooling measures, and it is not necessary to provide a space for heat dissipation in the surroundings, so the installation space is reduced and the space is effectively used. be able to. In addition, since it is not necessary to secure a space for heat dissipation in the surroundings, it can be housed in, for example, a compact soundproof box to prevent operating noise from leaking to the outside, so a compact and effective soundproofing measure can be taken. It can be applied easily.

Further, since the motor part and the pump part are formed in the same axis, the other end of the flow path and the outlet or inlet of the pump part can be arranged on the extension line of the motor shaft and the pump shaft. Therefore, since it can be made into a rod shape, that is, can be made thin, it can be housed in a compact box or in a wall.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a land pump which is an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 Shaft 1m Motor shaft part 1p Pump shaft part 2 Bearing 3 Intermediate wall 3hb Inlet 4 Motor end wall 4a Motor end wall part 4b Seal packing 4c Closure plate 4d Bolt 5 Rotating iron core 7 Stator iron core 8 Stator winding 9 Motor cylinder 10 Channel tube 11, 13, 14 Seal packing 12 Nut 15 Channel end wall 15h Water inlet 16,25 Bolt 17,21,26 Nut 18 Mechanical seal 19 Pump end wall 19h Water outlet 20 Pump rotary blade 22A, 22B Pump guide Blade 23 Pump cylinder 24 Seal packing M Motor part P Pump part Ti Water inlet pipe To Water outlet pipe

Claims (2)

[Claims] 1. A rotor core is fixed to a motor shaft, and a stator core that surrounds the rotor core with a predetermined gap operates a pump unit by a motor unit fixed to a motor casing. In a land pump that delivers a liquid flowing into an inflow port from an outflow port of the pump section, a predetermined number of flow paths made of a good heat conductor that penetrates the stator core in the axial direction of the motor shaft are provided, One end is connected to an inflow port or an outflow port of the pump section, wherein the land pump. 2. The land pump according to claim 1, wherein the motor shaft and the pump shaft of the pump portion are arranged coaxially, and an intermediate wall shared by the motor casing and the pump casing is watertight. A land pump that is characterized by: