JP3320487B2 - Land pump - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor unit and a pump unit, wherein the motor shaft and the pump unit have the same shaft. The present invention relates to a land-based pump that cools a motor unit using a liquid that flows or a liquid that flows out of an outlet of a pump unit.

[0002]

2. Description of the Related Art Conventionally, the above-mentioned on-land pump has a motor section and a pump section which are exposed to the air. When electric power is supplied to the motor unit of the land pump and the pump unit is operated, the rotating blades of the pump unit rotate, so that the pump unit pumps the liquid flowing into the inflow port by the rotating blades and sends it out of the outflow port. Then, heat generated by the operation of the motor unit is radiated to the atmosphere around the motor unit.

[0003]

Since the conventional land-based pump is of the air-cooled type as described above, the motor casing is made of a heat conductor to efficiently dissipate the heat released by the operation of the motor. In addition, cooling fins are attached to the motor casing, and a large number of ventilation holes for heat radiation are provided in the motor casing. Therefore, it is necessary to secure a heat radiation space for circulating the air around the land pump to dissipate the heat of the motor unit, so that the installation space becomes large and the space cannot be used effectively.

Further, in order to shield the sound of operation of the motor unit from leaking to the outside, for example, even if the soundproof box is used to cover the onshore pump, heat is accumulated in the soundproof box, and the above-mentioned heat dissipation space is required. Considering that it is necessary to secure soundproofing, there is a disadvantage that it is difficult to provide compact and effective soundproofing measures.

[0005] In order to solve the above-mentioned inconvenience, the present applicant has made the motor shaft of the motor section and the pump shaft of the pump section coaxial shafts, and has an intermediate shaft shared by the motor casing and the pump casing. The wall is made watertight with respect to the shaft, and the motor part is cooled using the liquid flowing into the inlet of the pump part or the liquid flowing out of the outlet of the pump part. A land-based pump that can be easily provided with compact and effective soundproofing measures and that can be formed into a rod shape and housed in a wall (reference number on February 15, 1993) 125
Filed as 00024. ) Was proposed earlier.

However, when the motor section and the pump section are arranged adjacent to each other and have the same shaft shape as described above, usually,
The liquid leaks slightly from the pump section to the motor section at the mechanical seal portion that makes the shaft and the intermediate wall watertight. Then, while the mechanical seal is normal, the liquid that slightly leaks to the motor unit evaporates to the outside of the motor unit due to the heat of the motor unit.

[0007] However, if the mechanical seal is used for a long time by using the land pump for a long time, or if the mechanical seal is improperly attached, a large amount of liquid leaks from the pump section to the motor section side. Since it is conceivable that a short circuit may occur due to the leaked liquid, it is necessary to ensure the safety by causing the leaked liquid to flow out so as not to enter the motor unit. The conventional air-cooled land pump has a structure in which a gap is provided between the motor unit and the pump unit so that the liquid leaking to the motor unit leaks to the outside in order to solve the above-described inconvenience. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned inconvenience, and it is possible to improve safety and to prevent liquid leaking from the pump section to the motor section from entering the motor section. An object of the present invention is to provide a land pump capable of efficiently and easily forming a circulation hole to be discharged to the outside.

[0009]

According to a first aspect of the present invention, a motor shaft of a motor unit and a pump shaft of a pump unit are coaxial shafts, and a motor casing of the motor unit and a pump casing of the pump unit are formed. the shared intermediate wall and watertight with respect to the shaft, a land pump to cool the motor unit using the liquid flowing out from the outlet of the liquid or pump unit flowing into the inlet port of the pump unit, the inlet or
Or, at the intermediate wall, a flow hole through which the liquid leaking from the pump section to the motor section side flows out to the outside in the seal section for making the shaft and the intermediate wall watertight is provided .
At least the motor cylinder that constitutes the
And a flow path that forms a liquid flow path together with the motor cylinder.
The cylinder is arranged on the outer periphery of the motor cylinder, and one end of the flow path is
Is connected to the outlet, and the motor cylinder and the flow path cylinder are
Constitute the motor casing with the intermediate wall facing and sandwiched
A watertight motor end wall is fixed with bolts . In the second invention, the intermediate wall is divided into a motor-side intermediate wall portion and a pump-side intermediate wall portion, and a communication hole is provided in a portion where the motor-side intermediate wall portion and the pump-side intermediate wall portion face each other. It is.

In a third aspect of the present invention, the motor shaft of the motor unit and the pump shaft of the pump unit are coaxial, and the end wall of the motor unit and the end of the pump unit facing each other with a predetermined gap therebetween. With a waterway ring interposed between the wall and
A land-based pump that cools a motor unit using liquid flowing into an inlet of a pump unit through a ring for a water channel or liquid flowing out of an outlet port of the pump unit through a ring for a water channel. , A flow hole penetrating from the shaft side to the outside is provided , and a small
At least the motor cylinder is made of a good conductor,
A flow path cylinder that forms a liquid flow path is placed around the motor cylinder.
If you arrange and connect one end of the flow path to the flow path of the water ring
Both motors oppose each other across the motor cylinder and the flow path cylinder
The two end walls are fixed with bolts .

[0011]

In the land pump according to the present invention, since the circulation hole is provided in the intermediate wall or the ring for the water channel, the liquid leaking from the pump portion to the motor portion side in the seal portion flows out through the circulation hole.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view showing a configuration of a land pump according to a first embodiment of the present invention, FIG. 2 is a right side view of the land pump shown in FIG. 1, FIG. 3 is a cross-sectional view taken along line CC of FIG. 4 is a sectional view taken along line DD of FIG. 1, FIG. 5 is a right side view showing a left half of a motor end wall constituting the land pump of FIG. 1, and FIG.
FIG. 1 is a right side view of a left half showing a shape of a seal packing (13) constituting a land pump of FIG.
-It corresponds to the cross section of the line B.

In these figures, reference numeral 1 denotes a shaft, a motor shaft 1m and a pump shaft 1p.
Are formed in a single shape. Reference numeral 2 denotes a bearing, which is attached to each end of the motor shaft 1m. Reference numeral 3 denotes an intermediate wall through which the shaft 1 penetrates, and a thermal conductor for supporting the shaft 1 via the bearing 2, a motor-side intermediate wall 3m, a pump-side intermediate wall 3p, and both intermediate walls made of plastic or a composite material. The seal packing 3s is sandwiched between 3m and 3p.

The motor-side intermediate wall 3m has a through-hole 3mha through which the shaft 1 penetrates, a vent 3mhb through which air flows and wires are inserted, a fluid through-hole 3mhc through which liquid flows, and a pump. A flow hole 3mhd formed on the surface facing the side intermediate wall 3p and communicating the through hole 3mha and the vent hole 3mhb is provided.
(Including 3mhd) and 3mhc are provided in the circumferential direction, in this case, alternately in four places. The pump-side intermediate wall 3p has a through hole 3pha through which the shaft 1 penetrates.
And an inflow port 3phb communicating with the liquid passage hole 3mhc, and four inflow ports 3phb are provided radially.

Reference numeral 4 denotes a motor end wall facing the intermediate wall 3, which is made of a good conductor, plastic or composite material.
One end of the shaft 1 is supported via the bearing 2. The motor end wall 4 includes a ventilation hole 4ha for allowing air to flow therethrough and a wire to pass therethrough, a radially formed concave portion 4d through which liquid flows, and a liquid through hole 4hb communicating with the concave portion 4d at the outer edge. The ventilation holes 4ha and the concave portions 4d (including the liquid passage holes 4hb) are provided alternately at four locations in the circumferential direction.

Reference numeral 5 denotes a rotor core fixed to the motor shaft 1m, 6 denotes an end ring fan formed in the rotor core 5, 7 denotes a stator core surrounding the rotor core 5 with a predetermined gap, 8 Denotes a stator winding wound around the stator core 7. Reference numeral 9 denotes a motor cylinder, which is made of a good conductor, plastic or composite material, and has a stator core 7 fixed inside.
Both open ends abut on the motor-side intermediate wall 3m and the motor end wall 4 via the seal packing 10, and are closed.
The motor casing includes a motor-side intermediate wall 3m, a motor end wall 4, and a motor cylinder 9.

Numeral 11 denotes a flow channel tube, which is made of a good conductor, plastic or composite material, and whose open ends are closed by being in contact with the motor-side intermediate wall portion 3m and the motor end wall 4 via the seal packing 12. I have. One end of the annular flow path formed by the two cylinders 9 and 11 communicates with the liquid passage hole 3mhc, and the other end of the annular circulation communicates with the liquid passage hole 4hb. Reference numeral 13 denotes a seal packing, and the motor end wall 4
Is in contact with the outer edge of the outer surface.

Reference numeral 14 denotes a flow path end wall made of a good conductor, plastic, or a composite material. The flow path end wall abuts on the motor end wall 4 via a seal packing 13 and has a water inlet 14ha to which a water inlet pipe Ti is connected. , And communicates with the recess 4 d of the motor end wall 4. The flow path body is composed of the flow path cylinder 11 and the flow path end wall 14.

Reference numeral 15 denotes a mechanical seal for making the shaft 1 (pump shaft portion 1p) and the pump side intermediate wall portion 3p watertight. Reference numeral 16 denotes a pump end wall facing the intermediate wall 3, and a water outlet 16 h as an outlet to which the water pipe To is connected is formed on an extension of the shaft 1. Numeral 17 denotes a pump rotating blade, into which a pump shaft portion 1p is inserted, and which is screwed to the other end of the shaft 1.
It is fixed at 8.

Reference numerals 19A, 19B, and 19C denote pump guide blades, and reference numeral 20 denotes a pump cylinder into which the pump guide blades 19A, 19B, and 19C are fitted. The wall 3p abuts on the pump end wall 16 and is closed. The pump casing includes a pump-side intermediate wall 3p, a pump end wall 16, and a pump cylinder 20.

Reference numeral 22 denotes a bolt, which penetrates the intermediate wall 3, the motor end wall 4, and the pump end wall 16. 23
Indicates a nut screwed into the bolt 22. M is a motor part,
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 shaft 1, the pump rotating blades 17 also rotate. When the pump rotating blade 17 rotates, water as a liquid flowing from the water inlet pipe Ti to the water inlet 14ha is
After passing through the concave portion 4d, the liquid passage hole 4hb, the flow path composed of the two cylinders 9 and 11, the liquid passage hole 3mhc, the liquid enters the pump portion P from the inflow port 3phb, and flows out from the water outlet 16h to the water discharge pipe To.

When electric power is supplied to the motor section M for operation, heat is generated when electric energy is converted into kinetic energy. This heat is generated by water flowing through the flow path through the motor cylinder 9. And is dissipated to the outside of the motor section M by air flowing in and out through the ventilation holes 3mhb and 4ha. Then, water leaked from the pump section P to the motor section M side in the mechanical seal 15 portion flows out through the through holes 3pha and 3mha and the circulation hole 3mhd.

Therefore, the heat of the motor section M can be effectively dissipated without taking special cooling measures, so that there is no need to provide a heat dissipation space around the motor section M. Therefore, the installation space is reduced and the space is reduced. It can be used effectively. Water flows around substantially the entire outer periphery of the motor casing, and the outside of the motor cylinder 9 is
1 and the outside of the motor end wall 4 is covered with the flow path end wall 14, so that the motor section M does not need to be covered with a soundproof box or the like.
Demonstrate the soundproof effect of reducing the operating noise of

Further, since there is no need to secure a space for heat radiation around the device, it is possible to house the device in a compact soundproof box, for example, in order to shield the operation sound from leaking to the outside. Soundproofing measures can be easily taken. And the installation space is small, and the water inlet 14ha and the water outlet 16h are connected to the shaft 1
Since it is arranged on the extension of the above, it can be formed into a rod shape, that is, thin, so that it can be housed in a compact box or in a wall.

Further, since the flow hole 3mhd is provided in the intermediate wall 3, water leaking from the pump portion P to the motor portion M side in the mechanical seal 15 portion can pass through the through holes 3pha, 3mha.
Also, since water flows out through the circulation hole 3mhd, even if water leaks from the mechanical seal 15 to the motor section M, water does not enter the motor section M, and safety is improved. Further, the intermediate wall 3 is divided into a motor-side intermediate wall 3m and a pump-side intermediate wall 3p, and a flow hole 3mhd is provided in a portion of the motor-side intermediate wall 3m facing the pump-side intermediate wall 3p. The flow holes 3mhd can be efficiently and easily formed. Note that no dew condensation occurs in the motor section M.

In the above embodiment, the intermediate wall 3 is divided into a motor-side intermediate wall 3m and a pump-side intermediate wall 3p.
Motor-side intermediate wall 3m opposed to pump-side intermediate wall 3p
Is provided with a flow hole 3mhd, but a liquid passage hole is provided in the pump-side intermediate wall 3p, or both the intermediate walls 3m, 3p and the seal packing 3s, or the motor-side intermediate wall 3m and the pump-side intermediate wall 3m. 3p may be integrated.

FIG. 7 is a partial sectional view showing the structure of a land pump according to a second embodiment of the present invention. FIG. 8 is a partial perspective view of a water ring (36) constituting the land pump shown in FIG. The same reference numerals are given to the same or corresponding parts as in FIGS. FIG. 7 corresponds to the lower part of FIG. 1 and the internal configurations of the motor unit and the pump unit are omitted. In these figures, reference numeral 31 denotes a motor end wall, which is made of a good conductor, plastic or a composite material and faces a pump end wall 35 described later with a predetermined gap. A liquid passage hole 31h communicating with a flow path formed by the cylinder 11 is formed.

Reference numeral 32 denotes a ring for a water channel, which is made of a heat conductive material, plastic or composite material, and has an O.
The motor cylinder 9 is in contact with the motor cylinder 9 and the flow path cylinder 11 via the O-rings 10B and 12B, and is in contact with the motor cylinder 9 and the flow path cylinder 11 via the O-rings 10B and 12B. A flow path 32i communicating with the flow path formed by the road cylinder 11 is formed. Reference numeral 33 denotes a ventilation cylinder, one flange of which abuts on the motor end wall 4 via a seal packing 13A, and the other of which abuts on the flow path end wall 14 via a seal packing 13B. 34, it is fixed between the motor end wall 4 and the flow path end wall 14.

Reference numeral 35 denotes a pump end wall provided with an inflow port 35h. Numeral 36 denotes a ring for the water channel, which is made of a good conductor, plastic or composite material, abuts on the motor end wall 31 via O-rings 37A and 37B, and is positioned on the pump end wall 35 via O-rings 38A and 38B. And a flow hole 3b penetrating from the shaft side 1 to the outside.
6h and a flow path 36i that connects the inflow port 35h with the flow path formed by the motor cylinder 9 and the flow path cylinder 11 are formed. Although description is omitted, bolt holes are also formed in the water ring 32.

Next, the operation is the same as that of the first embodiment, and the description is omitted. Therefore, the same effect as that of the first embodiment can be obtained also in the land pump of the second embodiment.

In each of the above embodiments, the motor end wall 4
Is formed in a watertight manner, and a flow path is formed on substantially the entire outer periphery of the motor unit M. However, when only the heat radiation of the motor unit M is intended, the flow is formed so as to cover a part of the outer periphery of the motor unit M. The purpose can be achieved even if a road body is provided. In this case, since it becomes possible to seal, compact and effective soundproofing measures can be easily and easily taken.

The wiring of the motor section M is formed by a vent hole 3 mhb.
Alternatively, it may be inserted through any of the ventilation hole 4ha, the ventilation hole 32h, and the ventilation cylinder 33, and the water may flow in the opposite direction. In addition, the ventilation hole 3 mhb or the ventilation hole 4
ha, one of the ventilation holes 32h and one of the ventilation cylinders 33 may be omitted. Although the motor end wall 4 and the flow path end wall 14 are configured separately, they may be formed integrally.

[0034]

As described above, according to the first aspect of the present invention, since the liquid passage hole is provided in the intermediate wall, the liquid leaking from the pump portion to the motor portion side at the seal portion is discharged to the outside through the circulation hole. Since the liquid flows out, the liquid does not enter the motor part, and the safety is improved. According to the second invention, the intermediate wall is divided into the motor-side intermediate wall portion and the pump-side intermediate wall portion, and a flow hole is provided in a portion where the motor-side intermediate wall portion and the pump-side intermediate wall portion face each other. Therefore, the flow holes can be efficiently and easily formed. Further, according to the third aspect, the same effect as that of the first aspect can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a land pump according to a first embodiment of the present invention.

FIG. 2 is a right side view of the land pump of FIG. 1;

FIG. 3 is a sectional view taken along line CC of FIG. 1;

FIG. 4 is a sectional view taken along line DD of FIG. 1;

FIG. 5 is a right side view showing a left half of a motor end wall constituting the land pump of FIG. 1;

FIG. 6 is a right side view of a left half showing a shape of a seal packing constituting the land pump of FIG. 1;

FIG. 7 is a partial sectional view showing a configuration of a land pump according to a second embodiment of the present invention.

8 is a partial perspective view of a ring for a water channel constituting the land pump of FIG. 7;

[Explanation of symbols]

 Reference Signs List 1 shaft 1m motor shaft part 1p pump shaft part 2 bearing 3 intermediate wall 3m motor side intermediate wall part 3mha through hole 3mhb ventilation hole 3mhc liquid passage hole 3mhd flow hole 3p pump side middle wall part 3pha through hole 3phb inlet 3s seal packing Motor end wall 4ha Vent hole 4hb Liquid passage hole 4d recess 5 Rotary core 7 Stator core 8 Stator winding 9 Motor cylinder 10, 12, 13, 13A, 13B Seal packing 10A, 10B, 12A, 12B O-ring 11 Flow path Cylinder 14 Flow path end wall 14ha Water inlet 15 Mechanical seal 16 Pump end wall 16h Water outlet 17 Pump rotating blade 18 Nut 19A, 19B, 19C Pump guide blade 20 Pump cylinder 21 Seal packing 22 Bolt 23 Nut 31 Motor end wall 31h Hole 32 Waterway Ring 32i Flow path 33 Vent cylinder 34 Nut 35 Pump end wall 35h Inlet 36 Ring for water path 36h Flow path 36i Flow path 37A, 37B, 38A, 38B O-ring M Motor part P Pump part Ti water pipe To water pipe

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F04D 13/06 F04D 29/58

Claims (3)

(57) [Claims] 1. A motor shaft of a motor unit and a pump shaft of a pump unit are coaxial shafts, and an intermediate wall shared by a motor casing of the motor unit and a pump casing of the pump unit is formed with respect to the shaft. Water-tight, a land pump that cools the motor unit using the liquid flowing into the inlet of the pump unit or the liquid flowing out of the outlet of the pump unit, wherein the inlet or the outlet, and , provided through-holes to flow out the liquid from leaking to the motor side from the pump unit in the sealing portion and said shaft and said intermediate wall watertightly outside the intermediate wall, at least a motor cylinder constituting the motor casing To
A flow path tube formed of a heat conductor and forming a flow path of the liquid together with the motor tube
Is disposed on the outer periphery of the motor cylinder, and one end of the flow path is connected to the inflow port or the outflow port.
The motor cylinder and the flow path cylinder,
Watertight motor constituting the motor casing and the wall
A land pump characterized in that the end wall and the end wall are fixed with bolts . 2. The land pump according to claim 1, wherein the intermediate wall is divided into a motor-side intermediate wall and a pump-side intermediate wall, and the motor-side intermediate wall and the pump-side intermediate wall are separated from each other. A land pump, wherein the flow hole is provided in an opposing portion. 3. A motor shaft of a motor unit and a pump shaft of a pump unit are coaxial shafts, and a predetermined gap is provided between an opposing end wall of the motor unit and an end wall of the pump unit. A liquid ring interposed between the pump and the motor using the liquid flowing into the inflow port of the pump unit through the water ring or the liquid flowing out from the outflow port of the pump unit through the water ring. A land pump for cooling a part, wherein a flow hole penetrating from the shaft side to the outside is provided in the ring for water channel, and at least a motor constituting a motor casing of the motor is provided .
Configure the chromatography data tube with good thermal conductor, the flow path cylinder to form a flow path of the liquid with the motor cylinder
Is disposed on the outer periphery of the motor cylinder, and one end of the flow path is connected to the flow path of the water ring.
Both the motors opposing each other with the motor cylinder and the flow path cylinder interposed therebetween.
A land pump characterized by fixing both end walls of a motor section with bolts .