JP2005351157A - Areal air-cooled device of vertical electric pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an areal air-cooled device of a vertical electric pump for enabling the air-cooled action to effectively function without increasing a load to a pump motor, applicable even to a pump of low speed operation, and performable only by applying a little processing to an existing pump. <P>SOLUTION: This device has an air sending port 6 for surrounding an out cover 4 so as to form an annular ventilation passage 5 on the outer periphery of a motor case 2, having the upper end of the out cover 4 fixed in a blocking-up state in the vicinity of an upper end part of the motor case 2, having the lower end opened downward in the vicinity of a lower end part of the motor case 2 and derived and opened from a side part of a peripheral wall upper part of the out cover 4; and is constituted so that a cooling fan 8 equipped with a small submersible motor 7 is installed on the deriving opening end of the air sending port 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an air / hollow cooling device for a vertical electric pump.

In a vertical electric pump, an air / hollow cooling device in which a cooling fan is attached to the upper end of a motor shaft led to the upper surface of a head cover has been conventionally practiced (see, for example, Patent Document 1). However, in the conventional cooling device described above, the motor shaft that rotates the pump impeller is shared by the rotation of the cooling fan, so the load on the motor increases and more heat is generated, and the fan cover is directly connected to the cooling fan. Since it exists only in the upper part, there is a drawback that the air cooling function does not function effectively in combination with the fact that air induction to the outer periphery of the motor case is not performed. In addition, the upper surface of the head cover is originally a part to which a lifting jig such as an eyebolt should be attached, and providing a cooling fan in this part is an obstacle to the mounting of the lifting jig and makes it difficult to suspend the pump. Become. In addition, since the rotation speed of the cooling fan depends on the rotation speed of the pump motor, there is a drawback that it cannot be applied to a pump operating at a low speed. Moreover, since the motor case peripheral side is exposed, the temperature inside the motor is promoted under the influence of direct sunlight when used in hot weather.
JP-A-8-114200 (FIG. 2)

  The problem to be solved is that the cooling fan can be mounted without obstructing the attachment of the hanging jig, the air cooling function functions effectively without increasing the load on the pump motor, and it is affected by direct sunlight even in hot weather It is an object of the present invention to provide a vertical air cooling device for a vertical electric pump, which can be applied to a pump operating at a low speed and can be implemented by performing a slight process on an existing pump.

  The vertical air pump of the vertical type electric pump of the present invention is equipped with an out cover provided so as to form an annular ventilation path on the outer periphery of the motor case in the vertical type electric pump, and the upper end of the out cover is attached to the motor case. The lower end of the motor case is fixed in a closed manner near the upper end, and the lower end is opened downward near the lower end of the motor case. The most important feature is that a cooling fan equipped with a small submersible motor is installed at the outlet opening end.

  According to the air-to-hollow cooling device of the vertical electric pump of the present invention, the out cover is installed so as to form an annular ventilation path on the outer periphery of the motor case, and is led out from the side portion of the upper portion of the outer cover. Since a cooling fan equipped with a small submersible motor is attached to the air supply port, the air blowing action that descends while turning along the outer periphery of the motor case without increasing the load on the pump motor for driving the cooling fan Thus, an effective air cooling effect can be obtained, and since the rotation speed of the cooling fan does not depend on the rotation speed of the pump motor, it can be applied to a pump operated at a low speed. In addition, unlike a conventional cooling device in which a cooling fan is provided on the upper surface of the head cover, there is no trouble in attaching a lifting jig such as an eyebolt. In addition, the presence of the out cover has the effect of blocking direct sunlight and preventing the temperature inside the motor from rising, and the air / cooling / cooling device can be attached to the existing pump by applying a slight process to the existing pump. There is an advantage that can be configured.

  A vertical electric pump is provided with an out cover provided so as to form an annular air passage on the outer periphery of the motor case, and the upper end of the out cover is fixed in the vicinity of the upper end of the motor case and the lower end is fixed to the motor case. A cooling fan equipped with a small submersible motor at the outlet opening end of the outlet opening. Mounted on the inner peripheral surface of the out cover, a thread groove that wraps down from the air supply port toward the lower end opening is recessed, and the cooling fan blows around the annular air passage so that the air blows along the thread groove. And is configured to be delivered from the lower end opening of the out cover.

  In the drawings of the embodiment, 1 is a pump casing, 2 is a motor case standing on the pump casing 1, and a stator (not shown) is fitted inside. Reference numeral 4 denotes an out cover, which is installed so as to form an annular ventilation path 5 on the outer periphery of the motor case 2, and the upper end of the out cover 4 is formed on a flange-shaped mounting seat 4 a so as to be near the upper end of the motor case 2. The lower end of the out cover 4 is opened in the vicinity of the lower end of the motor case 2 so as to be a downward exhaust port 4b. Reference numeral 6 denotes an air supply opening led out from the side of the upper part of the peripheral wall of the out cover 4, and 7 denotes a small submersible motor attached to the outlet opening end of the air supply opening 6. Cooling equipped with the small submersible motor 7 A fan 8 is attached. 9 is a water level detector provided near the lower end of the motor case 2, and 10 is an eyebolt mounted on the head cover 11, which is used to suspend the saddle type electric pump. When the water level detector detects that the water level has dropped and the motor case 2 is exposed on the surface of the water and the so-called air operation has been performed, the small underwater motor 7 is activated in response to the detection signal, and the cooling fan 8 The air is sent out from the downward-facing exhaust port 4b of the out cover 4 while cooling the entire outer periphery of the motor case 2 around the annular ventilation path 5.

  On the premise of the configuration of the first embodiment, a thread groove 12 that is rolled down from the air supply port 6 toward the lower end opening is provided in the inner peripheral surface of the out cover 4. The thread groove 12 may be recessed (not shown) on the outer peripheral surface of the motor case 2. Due to the presence of the thread groove 12, the air blowing action from the air supply port 6 to the exhaust port 4b through the ventilation path 5 is performed more smoothly. Moreover, the reinforcing effect of the out cover 4 is produced by the presence of the thread groove 12, and the out cover 4 having high strength can be configured with a thin material and lightweight.

It is a principal part vertical side view of the vertical type electric pump provided with this invention air hollow cooling device. It is a top view of the out cover which comprises this invention air hollow cooling device.

Explanation of symbols

2 Motor case 4 Out cover 5 Ventilation path 6 Air supply port 7 Small submersible motor 8 Cooling fan 12 Screw groove

Claims (2)

  A vertical electric pump is provided with an out cover provided so as to form an annular air passage on the outer periphery of the motor case, and the upper end of the out cover is fixed in the vicinity of the upper end of the motor case and the lower end is fixed to the motor case. A cooling fan equipped with a small submersible motor at the outlet opening end of the outlet opening. A vertical air-cooling device for a saddle-type electric pump, which is mounted and configured so that the air blown by the cooling fan is sent out from the lower end opening of the out cover along an annular ventilation path.   The air hollow cooling device for a saddle-type electric pump according to claim 1, wherein a thread groove that is rolled down from the air supply port toward the lower end opening is formed in the inner peripheral surface of the out cover. .

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