JP3587544B2 - Land pump - Google Patents

Description

[0001]
[Industrial applications]
According to the present invention, the motor section and the pump section are formed in a rod shape by using the motor shaft of the motor section and the pump shaft of the pump section as coaxial shafts, and the liquid flowing into the inflow port of the pump section or the flow of the pump section is formed. The present invention relates to a land pump that cools a motor unit using a liquid flowing out of an outlet.
[0002]
[Prior art]
Conventional land-based pumps are installed with the motor part 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. Therefore, 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]
[Problems to be solved by the invention]
Since the conventional land pump is air-cooled 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 unit, and cooling fins are provided on the motor casing. A large number of ventilation holes for heat dissipation are provided on the motor casing.
Therefore, it is necessary to secure a heat radiation space for dispersing the heat of the motor unit by circulating air around the land pump, so that the installation space becomes large and the space cannot be used effectively.
[0004]
In addition, in order to shield the sound of operation of the motor from leaking to the outside, even if, for example, the onshore pump is covered with a soundproof box, heat is accumulated in the soundproof box, and the above-mentioned heat dissipation space is secured. Considering the necessity, it was difficult to provide compact and effective soundproofing measures.
[0005]
In order to solve the above-described inconvenience, the present applicant has set the motor shaft of the motor unit and the pump shaft of the pump unit to have the same shaft shape, and has a shaft formed by an intermediate wall shared by the motor casing and the pump casing. By cooling the motor unit using water that flows into the inlet of the pump unit or liquid that flows out of the outlet of the pump unit, the installation space is small and the space can be effectively used. A land-based pump (Japanese Patent Application No. 5-47104) has been proposed in which a compact and effective soundproofing device can be easily provided, and can be formed into a rod shape and housed in a wall or the like. .
[0006]
However, as described above, when the motor unit and the pump unit are arranged adjacent to each other and have the same shaft shape, normally, the liquid slightly leaks from the pump unit to the motor unit side in the mechanical seal portion that makes the shaft and the intermediate wall watertight. .
Then, while the mechanical seal is functioning normally, the liquid that slightly leaks to the motor section evaporates to the outside of the motor section due to the heat of the motor section.
[0007]
However, if the mechanical seal is used for a long time by using a land pump for a long time, or if the mechanical seal is not installed properly, the liquid leaking from the pump to the motor will increase. Therefore, it is necessary to ensure the safety by leaking the leaked liquid to the outside 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 in order to solve the above-described inconvenience, and the liquid leaking to the motor unit side is leaked to the outside. Since the part and the pump part are separated, the number of parts is increased, the assembling work and the disassembling work are complicated, and the cost is naturally increased.
[0008]
The present invention has been made in order to solve the above-described inconvenience, and it is possible to improve safety by allowing liquid leaking from a pump part to flow outside so as not to enter a motor part, thereby improving safety. An object of the present invention is to provide a land pump capable of easily performing an assembling operation and a disassembling operation with a reduced amount, and enabling a liquid leakage sensor to detect liquid leakage from a pump section.
[0009]
[Means for Solving the Problems]
First, a first aspect of the present invention relates to a land pump in which a pump section is operated by a motor section and liquid flowing into an inlet of the pump section is sent out from an outlet of the pump section. an intermediate wall and the pump casing of the motor casing and the pump portion of the motor unit share constitutes the water-tight to the door on the same axial, an inlet or outlet port provided in the intermediate wall, at least a motor cylinder constituting the motor casing Is formed of a good heat conductor, a flow path tube that forms a liquid flow path together with the motor pipe is disposed on the outer periphery of the motor pipe, and one end of the flow path is connected to the inlet or the outlet, and the motor pipe and the flow an intermediate wall facing each other across a road body and a watertight motor end wall constituting the motor housing is bolted, the shaft of the intermediate wall portion to expose to the atmosphere, shea Setting the flow opening in the intermediate wall to flow out of the liquid leaking from the pump portion in the sealing portion of the shift and the intermediate wall watertightly outside Keru.
According to the second invention, a flat portion or a valley lower than the lower portion of the flow port is provided on the intermediate wall so that the liquid leaking from the pump portion does not immediately flow out of the flow port. Is provided.
[0010]
[Action]
In the land pump according to the present invention, since the communication port is provided in the intermediate wall, the liquid leaked from the pump section at the seal portion flows out through the communication port.
And, since there is provided a recess in which the liquid leaking from the pump unit is accumulated in the intermediate wall, by providing the liquid leakage sensor in the concave portion, it is possible to detect the liquid leakage from the pump unit.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing a configuration of a land pump according to an embodiment of the present invention, FIG. 2 is a left side view of an intermediate wall (side surface on a motor side), and FIG. 3 is a cross section taken along line AOB of FIG. FIG. 4, FIG. 4 is a right side view of the intermediate wall (side surface on the pump side), FIG. 5 is a sectional view taken along line CC of FIG. 3, FIG. 6 is a sectional view taken along line DD of FIG. FIG. 4 is a sectional view taken along line OE of FIG.
[0012]
In these figures, reference numeral 1 denotes a shaft, in which a motor shaft 1m and a pump shaft 1p are formed in a single shape.
Further, a plane portion 1f facing in the axial direction is provided in a portion of the shaft 1 located in a portion of the intermediate wall 3 described later.
Reference numeral 2 denotes a bearing, which is attached to each end of the motor shaft 1m.
[0013]
Reference numeral 3 denotes an intermediate wall through which the shaft 1 passes. The intermediate wall 3 is made of a good thermal conductor, plastic, or composite material that supports the shaft 1 via the bearing 2.
The intermediate wall 3 has a through hole 3ha through which the shaft 1 passes, a ventilation hole 3hb through which air is circulated or a wire is inserted, a liquid passage hole 3hc through which liquid flows, and a flat portion 1f of the shaft 1. A circulation port 3hd for exposing the liquid leaked from the through hole 3ha on the pump portion P side to the outside while being exposed to the atmosphere, and a concave portion 3d for storing a predetermined amount of the liquid leaking from the through hole 3ha on the pump portion P side are provided. The holes 3ha to 3hc and the recesses 3d communicate with the flow openings 3hd.
The concave portion 3d is provided so that a liquid leakage sensor can be provided in a flat portion (or valley portion) 3f lower than the lower portion of the flow opening 3hd so that the liquid leaking from the pump portion P side does not immediately flow out of the flow opening 3hd. Is provided.
[0014]
Reference numeral 4 denotes a liquid return plate through which the shaft 1 penetrates, which prevents liquid leaking from the through hole 3ha on the pump section P from entering the through hole 3ha on the motor section M side. Reference numeral 5 denotes a motor end wall facing the intermediate wall 3, which is made of a good thermal conductor, plastic or composite material, and supports one end of the shaft 1 via a bearing 2.
Reference numeral 6 denotes a rotor core fixed to the motor shaft 1m, 7 denotes an end ring fan formed on the rotor core 6, 8 denotes a stator core surrounding the rotor core 6 with a predetermined gap, and 9 denotes a stator. 2 shows a stator winding wound around an iron core 8.
[0015]
Reference numeral 10 denotes a motor cylinder, which is made of a good conductor, plastic or composite material, has a stator core 8 fixed inside, and both open end portions are in contact with the intermediate wall 3 and the motor end wall 5 via seal packing. It has been in water-tight.
The motor casing includes an intermediate wall 3, a motor end wall 5, and a motor cylinder 10.
[0016]
Reference numeral 11 denotes a mounting bolt for attaching and fixing the motor section M by attaching the motor end wall 5 and the motor cylinder 10 to the intermediate wall 3.
Reference numeral 12 denotes a discharge bracket facing the motor end wall 5, which is made of a good conductor, plastic or composite material, and has a discharge port 12h.
13 shows the flow path cylinder, a good heat conductor, is composed of a plastic or composite material, the open end portions are through the seal packing intermediate wall 3, contact with the water-tight to the ejection bracket 12.
[0017]
Reference numeral 14 denotes a mounting bolt, which fixes the flow path tube 13 to the intermediate wall 3 and the discharge bracket 12 by attaching the discharge bracket 12 to the motor end wall 5.
One end of the annular flow path formed by the two cylinders 10 and 13 communicates with the liquid passage hole 3hc, and the other end of the annular flow path communicates with the discharge port 12h.
Reference numeral 15 denotes a pump end wall facing the intermediate wall 3, which is made of a good heat conductor, plastic or composite material, and has an inlet 15h.
[0018]
Reference numeral 16 denotes a mechanical seal, which makes the shaft 1 (pump shaft portion 1p) and the intermediate wall 3 watertight.
Reference numeral 17 denotes a pump rotating blade, into which the pump shaft portion 1p is inserted, and which is fixed by a nut 18 screwed to the other end of the shaft 1.
Reference numeral 19 denotes a pump guide blade into which a shaft portion of the pump rotary blade 17 is inserted, and reference numeral 20 denotes an inner casing in which the pump guide blade 19 is fitted. Between the respective inner casings 20, the inner casing 20, the intermediate wall 3, and the pump end wall. 15 have been in the water-tight seal packing with.
[0019]
Reference numeral 21 denotes a pump cylinder, which is made of a good conductor, plastic or composite material.
Reference numeral 22 denotes a band bolt, which fixes the pump cylinder 21 between the intermediate wall 3 and the pump end wall 15 by attaching the inner casing 20 and the pump end wall 15 to the intermediate wall 3 using a nut 23.
The pump casing is constituted by the intermediate wall 3, the pump end wall 15, the inner casing 20, and the pump cylinder 21.
The outlet of the pump section P communicates with the liquid passage 3hc.
[0020]
Next, the operation will be described.
First, when the stator winding 9 of the motor section M is energized to rotate the rotor core 6 and the shaft 1, the pump rotating blades 17 also rotate.
Then, when the pump rotary blade 17 rotates, the water as the liquid flowing into the inflow port 15ha of the pump section P passes through the liquid passage hole 3hc of the intermediate wall 3 and flows through the motor cylinder 10 around the motor section M and the flow path. It enters the flow path formed by the cylinder 13 and flows out from the discharge port 12h of the discharge bracket 12.
[0021]
When the motor unit M is operated by supplying electric power in this manner, heat is generated when electric energy is converted into kinetic energy, and this heat is mostly transmitted to the water flowing through the flow path via the motor cylinder 10. Transported and radiated.
Then, the water leaking from the through hole 3ha on the pump section P side to the motor section M side in the mechanical seal 16 portion enters the recess 3d, and overflows from the recess 3d and flows out from the circulation port 3hd.
[0022]
Therefore, the heat of the motor section M can be effectively radiated without taking special cooling measures, so that there is no need to provide a space for heat dissipation around the periphery, so that the installation space is reduced and the space is effectively used. can do.
In addition, since water flows along substantially the entire outer periphery of the motor casing, the outside of the motor cylinder 10 is covered with the flow path cylinder 13, and the outside of the motor end wall 5 is covered with the discharge bracket 12. At least, a soundproof effect of reducing the operation sound of the motor unit M is exhibited.
[0023]
Furthermore, since there is no need to secure a space for heat radiation around the device, it is possible to store it in a compact soundproof box, for example, in order to shield operating noise from leaking to the outside. Can be easily applied.
Since the installation space is small and the inflow port 15h and the discharge port 12h are arranged on the extension of the shaft 1, it can be made rod-shaped, that is, thin, so that it can be housed in a compact box or installed in a wall. Etc. can be accommodated.
[0024]
Further, since the circulation port 3hd is provided in the intermediate wall 3, the water leaking from the pump portion P in the mechanical seal 16 flows out to the outside from the circulation port 3hd. Water is prevented from entering M and safety is improved.
Further, the pump unit P and the motor unit M share the intermediate wall 3, the shaft 1 of the intermediate wall 3 is exposed at the flow opening 3hd, and the shaft 1 exposed at the flow opening 3hd is provided with the flat surface 1f. Therefore, the number of parts is reduced, and the shaft 1 can be fixed so as not to rotate by inserting a spanner or the like into the distribution port 3hd and holding the flat portion 1f, so that the assembling work and the disassembling work can be easily performed.
[0025]
By arranging a water leakage sensor in the concave portion 3d of the intermediate wall 3, it is possible to detect a predetermined amount of water leakage from the pump portion P and stop the operation, thereby further improving safety. Can be.
Note that no dew condensation occurs in the motor section M.
[0026]
In the above-described embodiment, the flow path is formed on substantially the entire outer circumference of the motor section M. However, when only the heat radiation of the motor section M is intended, the flow path is formed so as to cover a part of the outer circumference of the motor section M. The purpose can be achieved by providing a road body.
In this case, since it becomes possible to seal, compact and effective soundproofing measures can be easily and easily taken.
Further, a configuration in which the liquid flows in the opposite direction may be adopted.
Although the motor end wall 5 and the discharge bracket 12 are configured separately, they may be configured integrally.
[0027]
【The invention's effect】
As described above, according to the present invention, since the flow port is provided in the intermediate wall, the liquid leaking from the pump section to the motor section side at the seal portion flows out through the flow port to the outside, so that the liquid flows into the motor section. And the safety is improved.
Then, the pump unit and the motor unit and is shared intermediate wall, since the shaft of the intermediate wall portion exposed in the distribution port, the number of parts is reduced, leading to cost of course.
Further, since there is provided a recess in the middle Makabe, by disposing the leak sensor in the recessed portion, since the leakage from the pump unit can be stopped by detecting became a predetermined amount, more Safety can be improved.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a configuration of a land pump according to one embodiment of the present invention.
FIG. 2 is a left side view of an intermediate wall.
FIG. 3 is a sectional view taken along line AOB of FIG. 2;
FIG. 4 is a right side view of the intermediate wall.
FIG. 5 is a sectional view taken along line CC in FIG. 3;
FIG. 6 is a sectional view taken along line DD of FIG. 3;
FIG. 7 is a sectional view taken along line OE of FIG. 4;
[Explanation of symbols]
M Motor part P Pump part 1 Shaft 1m Motor shaft part 1p Pump shaft part 1f Plane part 3 Intermediate wall 3ha Through hole 3hb Vent hole 3hc Liquid passage hole 3hd Flow port 3f Plane part 3d recessed part 5 Motor end wall 10 Motor cylinder 12 Discharge bracket 12h Discharge port 13 Flow path cylinder 15 Pump end wall 15h Inflow port 16 Mechanical seal

Claims (2)

In a land pump that operates a pump unit with a motor unit and sends out a liquid flowing into an inlet of the pump unit from an outlet of the pump unit,
The motor portion of the motor shaft and the pump casing and the intermediate wall to share the motor casing and the pump portion of the motor portion and a pump shaft in the same axis of the pump portion configured to water-tight,
The intermediate wall is provided with the inflow port or the outflow port ,
At least the motor cylinder constituting the motor casing is composed of a good heat conductor,
A flow path cylinder that forms the liquid flow path together with the motor cylinder is disposed on the outer periphery of the motor cylinder,
While connecting one end of the flow path to the inflow port or the outflow port,
The intermediate wall facing the motor cylinder and the flow path body therebetween, and a water-tight motor end wall constituting the motor casing are fixed with bolts,
Wherein said shaft to expose to the atmosphere of the intermediate wall portion, digits set a circulation port for flowing out the liquid leaking from the pump portion in the sealing portion and said shaft and said intermediate wall watertightly outside the intermediate wall,
A land-based pump characterized by the above-mentioned. The land pump according to claim 1,
A flat portion or a valley portion lower than the lower portion of the flow port is provided on the intermediate wall so that the liquid leaked from the pump portion does not immediately flow out of the flow port,
A concave portion for arranging a liquid leakage sensor is provided in this flat portion or valley portion,
A land pump characterized by the above-mentioned.

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