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Low-noise fanner

A fan and low-noise technology, applied in the field of low-noise fans and low-noise fans, can solve the problem that the size and noise level cannot meet the comprehensive performance requirements of the propulsion motor at the same time, and the air volume, total pressure and efficiency cannot meet the requirements of the propulsion at the same time. The ventilation and cooling requirements of the motor and the failure to meet the maintenance requirements of the ventilation and cooling system of the marine propulsion motor have achieved the effect of remarkable technical effect, simple structure and convenient maintenance.

Inactive Publication Date: 2010-02-10
中国船舶重工集团公司第七一二研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing multiple low-noise fans in the prior art, including some marine low-noise fans, but they are mostly used in hull wind supply occasions, these fans are often larger flow or lower total pressure, and propulsion motor The parameters and characteristics of the fan are different, and its air volume, total pressure, efficiency and other parameters cannot meet the ventilation and cooling requirements of the propulsion motor at the same time
[0004] The noise reduction measures of the existing low-noise fans are mainly the use of noise-absorbing materials and the reduction of the fan speed, and these methods will inevitably lead to an increase in the size of the fan, which is used for large installation space or unlimited size In some applications, its size and noise level cannot meet the comprehensive performance requirements of the propulsion motor at the same time.
[0005] In consideration of maintainability, the fan for the propulsion motor is in the closed ventilation cooling system, and the air inlet is inside the cooling system, which is not easy to reach.
Therefore, the maintenance parts of the fan for the propulsion motor cannot be used in the traditional way
Civilian fans and general-purpose marine fans generally use the air inlet position as the maintenance window. The method of removing the fan motor after removing the impeller in the fan volute cannot meet the maintenance requirements of the marine propulsion motor ventilation and cooling system.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1: as Figure 1-7 As shown, it is a low-noise fan, which has an air inlet 1, an impeller 2, and a volute 4; there is a maintenance flange 3 on the motor side of the fan; the maintenance flange 3 and the air inlet 1 are respectively connected to the volute The shell 4 is positioned and fixedly connected with a seam; the air inlet 1 is arc-shaped and streamlined to improve the pressure coefficient and overall efficiency of the fan. 1 There is an embedded dynamic fit groove 5 at the place where it matches the tuyere of the impeller 2. The dynamic fit gap is the radial gap and axial gap at the groove 5; the radial gap is less than or equal to 2 mm on one side, and the is 1.5 mm, and the axial gap is less than or equal to 6 mm, which is selected as 4 mm; the air inlet 1 is cast from an aluminum alloy to form an integral part, and is produced by casting aluminum alloy, which has good manufacturability and light weight; the thickness of the air inlet 1 is 15-25 mm,...

Embodiment 2

[0027] Embodiment 2: The difference from the above embodiment is that the diameter parameter of the air inlet 1 streamlined arc is 80 mm; the radial gap at the groove 5 is 1 mm on one side, and the axial gap is 2 mm; the air inlet 1 The thickness of the volute is 15 millimeters, and the thickness of the steel plate of the volute 4 is 5 millimeters. The fixed connections between the air inlets 1 and the volute 4 are bolt connections.

Embodiment 3

[0028] Embodiment 3: The difference from the above embodiment is that the diameter parameter of the streamlined arc of the air inlet 1 is 150 mm; the radial gap at the groove 5 is 2 mm on one side, and the axial gap is 6 mm; the air inlet 1 The thickness of the volute is 25 millimeters; the thickness of the steel plate of the volute 4 is 16 millimeters. The fixed connection between the air inlet 1 and the volute 4 is screw connection.

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Abstract

The invention relates to a fan with low noise, which is suitable for middle and large motors with small operating circumstance space, low noise, easy installation and maintenance, especially propulsion motor used in middle and large ships. It comprises air inlet, impeller and spiral case. Thereinto, there is a maintenance flange located at one side of motor of fan. The maintenance flange and the air inlet are located with the spiral case respectively by spigot and are fixed with the spiral case. The air inlet is arc streamline figure and embedding concave groove with movable fit is set at thefit position of air inlet and wind port of impeller. The gap of movable fit is radial gap and axial gap at the position of concave groove. The fan in invention need not increase affiliated noise-elimination material and it is provided with high efficiency, low noise, small cubage, simple structure and convenient maintenance.

Description

technical field [0001] The invention relates to a low-noise ventilator, which belongs to the technical field of ventilation, and is suitable for use as a ventilator for medium and large motors with small environmental space, requiring low noise, and easy installation and maintenance, especially suitable for ventilation and cooling of medium and large marine propulsion motors , low-noise ventilator. Background technique [0002] In heat dissipation and cooling equipment for medium and large motors, ventilating and cooling through fans is a practical and economical technical solution. Taking the ventilation and cooling of large marine propulsion motors as an example, the closed circulation ventilation and cooling method is generally adopted, in which the fan provides the air volume required for cooling the propulsion motor to ensure the normal operation of the propulsion motor, and is an important auxiliary equipment for the propulsion motor. The layout space of marine propul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/66F04D29/62F04D29/42F04D29/30
Inventor 杨志华张丽民胡国葆于永先
Owner 中国船舶重工集团公司第七一二研究所
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