JPH0571493A - Submergible pump - Google Patents

Abstract

PURPOSE:To enable a delivery port casing and a motor casing to be selectively combined according to the delivery amount and head of the pump, and arbitrary pump specification to be easily realized by separately forming the delivery port casing and the motor casing. CONSTITUTION:A suction port casing 2 constituting a suction port 1 is so formed as to enclose an impeller 3, and the first guide vane 4 is internally integrated with the casing 2. Also, a guide vane device 5 having an outer casing 6 and a conical inner casing 7 is so mounted on the port 2 as to be freely detachable, and both inner and outer casings 7 and 6 are integrated with each other via the second guide wane 8. Furthermore, a cylindrical motor casing 11 is so mounted on the upper end of the inner casing 7 as to be freely detachable via a bearing section 10, and the forward end of a drive shaft 13 for a motor 12 housed in the motor casing 11 penetrates the bottom sections of the bearing 10 and the inner casing 7, reaching the inside of the suction port casing 2. The end of the shaft 13 is fitted with the impeller 3.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a submersible pump.

[0002]

2. Description of the Related Art Conventionally, a submersible pump has a pump casing having a suction port and a discharge port, a motor arranged in the pump casing for rotationally driving an impeller, and a motor casing for waterproofing the motor. The pump casing and the motor casing were integrally cast. The diameter of the discharge port of the pump casing is defined by the discharge amount of the pump, and the motor casing is
That is, it is defined by the output and the number of poles, and the motor rating is defined by the pump head and discharge amount. Therefore, the submersible pump is manufactured according to each discharge amount and head, and has different pump casings and motor casings.

[0003]

However, according to the above-mentioned conventional structure, since the pump casing and the motor casing are integrally formed, the cost of the mold is high and the casting process is complicated and the casting product is complicated. However, there is a problem that a dimensional error is likely to occur, the yield is deteriorated, and it takes time and trouble to handle a cast product. In particular, if an error occurs in the centering of the motor casing with respect to the inner diameter of the pump casing, the drive shaft of the motor tilts, causing the impeller to hit the inner peripheral surface of the pump casing, resulting in a defective product.

Further, since the pump casing and the motor casing are manufactured integrally and according to the discharge amount and the lifting height, there is no commonality of parts between pumps of different standards, and the number of parts stock in the factory increases. There was a problem.

The present invention solves the above-mentioned problems, and the constituent members can be easily manufactured with high precision, and the commonality of the parts allows the specifications to be easily changed according to the purpose. It aims at providing the submersible pump which can be performed.

[0006]

In order to solve the above problems, the submersible pump of the present invention is provided with a suction port casing having a shape surrounding an impeller and forming a suction port, and provided continuously to the upper end of the suction port casing. A guide vane device having an outer casing and an inner casing integrally provided on the outer casing via guide vanes, and a motor that drives the impeller in a tubular shape are included and attached to the upper end of the inner casing of the guide vane device. The motor casing is freely fixed, and the discharge port is formed so as to surround the motor casing, and the motor casing is detachably fixed to the upper end of the outer casing of the guide vane device. The discharge port casing is detachably held.

[0007]

With the above structure, the discharge port casing and the motor casing are separately formed, so that the discharge port casing and the motor casing can be selected and combined according to the discharge amount and the lift of the pump. The discharge amount of the pump is specified by the diameter of the discharge port of the discharge casing,
The lift is specified by the motor rating. Therefore, when changing the discharge amount, a submersible pump can be configured according to the purpose by replacing the discharge port casing with another discharge port casing having a discharge port having a diameter corresponding to the discharge amount. When changing, the submersible pump according to the purpose can be configured by replacing the motor casing with another motor casing capable of containing a motor corresponding to the lift. Furthermore, by changing the outlet casing, the position and direction of the outlet can be easily changed.

[0008] Therefore, since the main constituent parts are shared by a plurality of types of submersible pumps having different specifications, it is possible to reduce the number of parts when manufacturing a plurality of types of submersible pumps and to reduce the manufacturing cost. ..

Further, by forming the discharge port casing and the motor casing separately, it is possible to simplify the casting mold in casting, simplifies the casting process, and simplifies the processing. The precision of the cast product can be improved by simplifying the process.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, a suction port casing 2 forming a suction port 1 has a shape surrounding an impeller 3, and a first guide blade 4 is integrally formed inside the impeller 3 in front of the impeller 3. ..

A guide vane device 5 is provided so as to be detachably fixed to the suction port casing 2, and the guide vane device 5 has an outer casing 6 having a shape continuing from the upper end of the suction port casing 2 and an outer casing 6. The inner casing 7 has a conical shape arranged inside, and the outer casing 6 and the inner casing 7 are integrally formed via the second guide blade 8. An oil sump portion 9 is formed inside the inner casing 7, and a bearing portion 10 is provided above the inner casing 7.

Then, the cylindrical motor casing 11
Is detachably fixed to the upper end of the inner casing 7 via the bearing portion 10, and the motor 12 is enclosed inside the motor casing 11. This motor 12
The leading end side of the drive shaft 13 penetrates through the bearing 10 and the bottom of the inner casing 7 to reach the inside of the suction port casing 2, and the impeller 3 is attached and fixed to the leading end of the drive shaft 13.
Is rotatably supported by the bearing 10 via a bearing 14.

A discharge port casing 15 is removably fixed to the upper end of the outer casing 6, and the discharge port casing 15 has a curved pipe shape surrounding the motor casing 11 and is provided with respect to the suction port 1. A discharge port 16 is formed which faces the right angle direction. Further, the discharge port 16 and the suction port 1 are provided at positions facing the motor 12. Further, an opening for inserting the motor casing 11 is formed on the upper side of the discharge port casing 15, and the discharge port casing 15 detachably holds the upper end side of the motor casing 11 at the opening. A watertight seal is provided between the inner peripheral surface of the opening and the outer peripheral surface of the upper end of the motor casing 11.

The electrode base 17 is provided on the upper end of the motor casing 11 protruding outside the discharge casing 15.
Is provided and covers the electrode base 17 to cover the upper cover 18
Is provided. Further, power cords 19 are inserted through the upper cover 18 so that the gap between the power cords 19 and the upper cover 18 is watertight.

The operation of the above structure will be described below.
By driving the motor 12, the impeller 3 attached to the tip of the drive shaft 13 is rotationally driven to suck the fluid from the suction port 1.
The sucked fluid passes through the flow path between the outer casing 6 and the inner casing 7 of the guide vane device 5, and is discharged to the outside from the discharge port 16 of the discharge port casing 15.

At this time, the oil filled in the oil sump portion 9 of the inner casing 7 is sealed by the mechanical seal S interposed between the inner casing 7 and the drive shaft 13, and the fluid permeates the inside of the motor casing 11. Never. Further, since the motor casing 11 and the inner casing 7 are fastened and fixed with bolts via the bearing portion 10, perfect water shutoff is ensured.

The discharge amount of the pump is defined by the diameter of the discharge port 16 of the discharge casing 15, and the lift is defined by the rating (output or number of poles) of the motor 12. Therefore, the outlet casing 15 and the motor casing 1
By separately forming 1, the discharge port casing 15 and the motor casing 11 according to the discharge amount and the pump head of the pump.
Can be selected and combined to form any pump specifications.

Therefore, as shown in FIG. 2, when the discharge amount is changed, the discharge port casing 15 in FIG. 1 is replaced with another discharge port casing 15A having a discharge port having a diameter corresponding to the discharge amount. Thus, a submersible pump can be constructed according to the purpose. In FIG. 2, since the discharge amount is reduced, the diameter of the discharge port 16A becomes smaller.

Further, as shown in FIG. 3, when the lift is changed, the motor casing 11 in FIG. 1 is replaced with another motor casing 11A capable of containing the motor 12A corresponding to the lift to meet the purpose. A submersible pump can be constructed. In FIG. 3, the motor 12A
Output becomes smaller and the head becomes lower.

Further, by replacing the discharge port casing 21 as shown in FIG. 4, the position and direction of the discharge port 22 can be easily changed. In FIG. 4, the discharge port casing 21 provided following the upper end of the outer casing 6 is
It is composed of a straight tubular body casing 23, an upper casing 24 that forms the discharge port 22, and a guide casing 25 that covers the upper end of the motor casing 11. The upper casing 24 and the guide casing 25 are integrated via a support portion 26. Has been formed. In addition, the guide casing 25
Is provided so as to cover the upper cover 18, and the power cords 19 are inserted through the inside of the support portion 26 and drawn out of the upper casing 24.

Therefore, since the main constituent parts are shared by a plurality of types of submersible pumps having different specifications, the number of parts can be reduced when manufacturing a plurality of types of submersible pumps, and the manufacturing cost can be reduced. ..

By forming the discharge port casing 15 and the motor casing 11 as separate bodies, it is possible to simplify the casting mold, the casting process, and the processing, thereby simplifying the casting mold. Further, the accuracy of the cast product can be improved by simplifying the casting process.

[0023]

As described above, according to the present invention, by separately forming the discharge port casing and the motor casing, the discharge port casing and the motor casing are selected and combined according to the discharge amount and the pump head of the pump. It is possible to realize arbitrary pump specifications, reduce the number of parts when manufacturing a plurality of types of submersible pumps, and reduce the manufacturing cost. Further, by forming the discharge port casing and the motor casing separately, it is possible to simplify the casting mold in casting, simplify the casting process, simplify the processing, and improve the precision of the cast product.

[Brief description of drawings]

FIG. 1 is an overall vertical sectional view showing a submersible pump according to an embodiment of the present invention.

FIG. 2 is an overall vertical sectional view showing a submersible pump according to another embodiment of the present invention.

FIG. 3 is an overall vertical sectional view showing a submersible pump according to still another embodiment of the present invention.

FIG. 4 is an overall vertical sectional view showing a submersible pump according to still another embodiment of the present invention.

[Explanation of symbols]

 1 Suction Port 2 Suction Port Casing 6 Outer Casing 7 Inner Casing 11 Motor Casing 15 Discharge Port Casing 16 Discharge Port

Claims (1)

[Claims] 1. A suction port casing having a shape surrounding an impeller to form a suction port, an outer casing provided continuously to an upper end of the suction port casing, and an inner casing integrally provided on the outer casing via guide vanes. With a guide vane device having a cylindrical shape and a motor that drives the impeller in a tubular shape, and is detachably fixed to the upper end of the inner casing of the guide vane device, and has a shape surrounding the motor casing. And a discharge port casing detachably fixed to the upper end of the outer casing of the guide vane device and removably holding the upper end side of the motor casing. pump.