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A box-type motor shaft and outer fan cover penetrating sealing device

A technology for motor shafts and sealing devices, applied in the direction of electromechanical devices, cooling/ventilation devices, electrical components, etc., can solve problems such as inconvenient operation, noise pollution, and narrow space, to avoid magnetization, avoid excessive wear, and install and maintain convenient effect

Active Publication Date: 2016-09-28
武汉奥特彼电机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the fan cover is a welded part, and there is no technical machining positioning reference plane when the fan cover is connected to the machine base, the center of the shaft through hole on the fan cover and the center of the rotating shaft deviate greatly
At present, the motor industry generally adopts increasing the diameter of the shaft through hole on the fan cover to avoid the interference between the rotating shaft and the fan cover, and to facilitate the overall assembly of the motor. Due to the blowing effect of the external fan, the air pressure inside the fan cover is greater than the air pressure outside the fan cover, and the air in the fan cover leaks out of the fan cover through the gap, resulting in a decrease in the cooling air volume for effectively cooling the motor and reducing the ventilation efficiency of the external fan. lead to waste of motor energy
In order to solve the insufficient cooling air of the motor caused by the air leakage at the penetration of the shaft and the fan cover, some motor manufacturing units adopt the method of increasing the external fan to ensure that the motor obtains sufficient cooling air volume, but it cannot avoid the waste of motor energy and cause motor noise increase, noise pollution
Some motor manufacturing units reduce the gap between the rotating shaft and the upper shaft through hole of the fan cover by welding two semicircular rings near the through hole of the fan cover shaft after the motor is assembled. The space between the bases is narrow, the operation is inconvenient, and it is easy to cause the production site to be messy; at the user's site, because the gap between the rotating shaft and the shaft penetration hole on the fan cover is small, it is necessary to remove and install the fan cover during maintenance. It is very inconvenient to remove the cooler

Method used

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  • A box-type motor shaft and outer fan cover penetrating sealing device
  • A box-type motor shaft and outer fan cover penetrating sealing device
  • A box-type motor shaft and outer fan cover penetrating sealing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] like figure 2 As shown in -4, a box-type motor shaft and outer fan cover pass through the sealing device, including the motor shaft 5, the sealing ring 8, the magnetic steel fixing column 7, the fixing ring 6, the fan cover 3, and the side wall of the fan cover 3. There is a shaft through hole, and the motor shaft 5 extends to the inside of the fan cover 3 through the shaft through hole. The connecting part of the motor shaft 5 and the side wall of the fan cover 3 is provided with a sealing ring 8, a fixed ring 6, and a sealing ring in sequence along the direction away from the side wall of the fan cover. Eight through holes 9 are evenly distributed on the end face of 8 .

[0019] The body of the magnetic steel fixing column 7 is a cylinder, and the top radial protrusion of the cylinder is provided with an annular step 10, and the cylinder passes through the through hole 9 on the sealing ring 8 and is adsorbed on the side wall of the fan cover 3, and the annular step ...

Embodiment 2

[0025] The difference between embodiment 2 and embodiment 1 is that the inner hole of the sealing ring 8 is 4mm larger than the diameter of the motor shaft 5, and the inner hole of the fixed ring 6 is 20mm larger than the inner hole diameter of the sealing ring 8; the sealing ring 8 The material is a plastic plate; the height of the cylinder of the magnetic steel fixing column 7 below the annular step 10 is 0.6 mm greater than the thickness of the sealing ring 8 .

Embodiment 3

[0027] The difference between embodiment 3 and embodiment 1 is that the inner hole of the sealing ring 8 is 3mm larger than the diameter of the motor shaft 5, and the inner hole of the fixed ring 6 is 15mm larger than the inner hole diameter of the sealing ring 8; the sealing ring 8 The material is glass steel; the height of the cylinder of the magnetic steel fixing column 7 below the annular step 10 is 0.5 mm greater than the thickness of the sealing ring 8 .

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PUM

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Abstract

The invention belongs to a box-type motor shaft and outer fan cover penetrating sealing device, including a motor shaft, a sealing ring, a magnetic steel fixing column, a fixing ring, and a fan cover. The shaft through hole extends to the inside of the fan cover. The connecting part of the motor shaft and the side wall of the fan cover is provided with a sealing ring and a fixed ring in sequence along the direction away from the side wall of the fan cover. There are an even number of through holes evenly distributed on the end surface of the sealing ring. The steel fixing post is located between the sealing ring and the fixing ring and is adsorbed on the side wall of the fan cover through the through hole on the sealing ring, and the fixing ring is adsorbed on the magnetic steel fixing post. The invention does not need to be welded or bolted, is convenient to install and maintain, and can improve production efficiency.

Description

technical field [0001] The invention belongs to the technical field of cooling box-type motor equipment, and in particular relates to a sealing device through which a box-type motor shaft and an outer fan cover penetrate. Background technique [0002] A fan cover and a cooler are installed outside the air-to-air cooling box-type motor base, and the rotating shaft penetrates into the fan cover and a fan is installed, and the fan is located in the fan cover. When the shaft of the motor rotates, the fan generates air blowing, and the cooling air outside the motor is blown through the cooling pipe of the cooler through the guidance of the fan cover, thereby generating the external cooling effect of the motor. Because the fan cover is a welded part, and there is no technology to process the positioning reference plane when the fan cover is connected to the machine base, the center of the shaft through hole on the fan cover and the center of the rotating shaft deviate greatly. At...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K9/06
CPCH02K9/06
Inventor 张运生乔建伟曲振业杜振坤陈辉朱新年
Owner 武汉奥特彼电机有限公司