Oil-submersible pump

A technology of submersible oil pump and pump casing, which is applied in the field of liquid conveying device, can solve the problems that motor shaft bearing cannot be lubricated well, the reliability and safety of pump and motor are affected, and the reliability and safety of pump operation are not good. , to achieve the effect of improving reliability and safety, simple structure and obvious cooling effect

Inactive Publication Date: 2006-08-16
浙江德力装备有限公司
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0002] Existing submersible oil pumps are usually equipped with a motor at one end of the pump body to provide power, and there are the following defects in the process of conveying the medium: First, the cooling of the motor is completed by the heat exchange between the motor casing and the stationary medium, and the cooling effect of the motor is not good , the temperature rise is large, and the reliability and safety of the pump operation are not good; second, in order to avoid the influence of the motor by the conveying medium, a sealing structure (such as a mechanical seal) must be set on the motor shaft, and the motor is easy to leak when it is running, which directly affects The reliability and safety of pump and motor operation; third, the bearing on the motor shaft is not well lubricated after a long time of work, which affects its service life

Method used

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Embodiment Construction

[0016] As shown in the figure, the present invention mainly includes a pump casing 4, a motor stator 6, an integrated motor rotor 8, a motor shaft 25, and an impeller 15 on the motor shaft; wherein the lower end of the pump casing 4 has a horizontal liquid inlet 17; the pump There is a step 20 on the inner wall of the shell, and the lower bearing seat 11 is positioned on the step 20; the lower end of the motor shaft 25 is positioned on the lower bearing seat 11 by the lower axial bearing 10a and the lower radial bearing 10b, and is connected with the impeller located on the lower side of the lower bearing seat. 15 is connected with the nut 16 through the key 18, and the upper end of the motor shaft 25 is positioned on the upper bearing seat 5 by the upper axial bearing 24a and the upper radial bearing 24b; 5 and the lower bearing seat 11 are fixed, an outer ring channel 21 is formed with the pump casing 4, and an inner ring channel 22 is formed between the motor rotor 8; the up...

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Abstract

An immersible oil pump for delivering the light oil easy to burning and exploding is composed of casing, motor stator, integrated rotor and shaft of motor, and vane wheel on said shaft of motor. It features that an external channel between casing and motor stator is designed for allowing the delivered medium to flow through it to cool the motor and said rotor has no dynamic sealing for allowing part of the delivered medium to lubricate the motor and bearings.

Description

【Technical field】 [0001] The utility model relates to a liquid conveying device, in particular to a submersible oil pump, which is used for conveying flammable and explosive light oil products, chemicals and other media. 【Background technique】 [0002] Existing submersible oil pumps are usually equipped with a motor at one end of the pump body to provide power, and there are the following defects in the process of conveying the medium: First, the cooling of the motor is completed by the heat exchange between the motor casing and the stationary medium, and the cooling effect of the motor is not good , the temperature rise is large, and the reliability and safety of the pump operation are not good; second, in order to avoid the influence of the motor by the conveying medium, a sealing structure (such as a mechanical seal) must be set on the motor shaft, and the motor is easy to leak when it is running, which directly affects The reliability and safety of pump and motor operati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D13/08
Inventor 徐松樟孙洁民
Owner 浙江德力装备有限公司
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