阅读说明：本技术 低转速离心风轮冷却塔 (Low-rotating-speed centrifugal wind wheel cooling tower ) 是由 梁耀文 于 2019-10-21 设计创作，主要内容包括：低转速离心风轮冷却塔,包括塔体,所述塔体具有进风口和出风口,所述塔体内设有填料区,所述填料区位于进风口和出风口之间,所述出风口处安装有离心风轮,所述离心风轮沿轴线进气,沿叶片外缘周排气,所述离心风轮的工作转速为每分钟60至180转。通过配置低转速高扭矩的电机,使离心风轮的工作转速维持在每分钟60至180转的范围内,保障冷却塔能够满足必须的通风量的同时实现低噪声运行。本技术方案利用低转速离心风轮取代传统的轴流风轮,在保证相同的轮外缘直径和通风量要求的前提下,通过配置低转速大扭矩的动力源来驱动离心风轮送风,令离心风轮保持在每分钟60至180转的低转速运行,从而实现冷却塔低噪声,符合环保要求。(Low rotational speed centrifugal wind wheel cooling tower, including the tower body, the tower body has air intake and air outlet, be equipped with filler district in the tower body, filler district is located between air intake and the air outlet, air outlet department installs centrifugal wind wheel, centrifugal wind wheel admits air along the axis, exhausts along blade outer fringe week, centrifugal wind wheel's operating speed is 60 to 180 rotations per minute. The working rotating speed of the centrifugal wind wheel is maintained in the range of 60-180 revolutions per minute by configuring the motor with low rotating speed and high torque, and the cooling tower can meet the necessary ventilation quantity and realize low-noise operation at the same time. According to the technical scheme, the low-rotation-speed centrifugal wind wheel is used for replacing the traditional axial flow wind wheel, on the premise that the same wheel outer edge diameter and ventilation quantity requirements are guaranteed, the centrifugal wind wheel is driven to supply air by a power source with low rotation speed and large torque, the centrifugal wind wheel is enabled to be kept in low-rotation-speed operation of 60-180 revolutions per minute, and therefore low noise of a cooling tower is achieved, and the environmental protection requirements are met.)

1. Low rotational speed centrifugal wind wheel cooling tower, a serial communication port, including the tower body, the tower body has air intake and air outlet, be equipped with the filler district in the tower body, the filler district is located between air intake and the air outlet, air outlet department installs centrifugal wind wheel, centrifugal wind wheel admits air along the axis, exhausts along blade outer fringe week, centrifugal wind wheel's operating speed is 60 to 180 rotations per minute.

2. The cooling tower with the low rotating speed and the centrifugal wind wheel according to claim 1, wherein no wind guide part is arranged on the periphery of the centrifugal wind wheel, and airflow exhausts and dissipates heat along the circumferential direction of the centrifugal wind wheel.

3. The low speed centrifugal rotor cooling tower of claim 2, wherein the blades of the centrifugal rotor are pitched centrifugal blades.

4. The cooling tower of claim 1, wherein the centrifugal wind wheel is provided with air ducts at the periphery.

5. The cooling tower with the low rotating speed and the centrifugal wind wheel according to claim 4, wherein the air outlet direction of the air duct is perpendicular to the rotating shaft direction of the centrifugal wind wheel, and the air outlet area of the air duct is larger than the air outlet area of the centrifugal wind wheel.

6. The cooling tower with the low rotating speed and the centrifugal wind wheel according to claim 4, wherein when the air flow direction of the exhaust air is consistent with the rotation axis of the centrifugal wind wheel, a gap is formed between the air duct and the centrifugal wind wheel, and the gap is more than 10% of the diameter of the centrifugal wind wheel.

7. The low speed centrifugal wind rotor cooling tower according to claim 4, wherein the blades of the centrifugal wind rotor are forward-tilted centrifugal blades.

8. The cooling tower of the low-speed centrifugal wind wheel according to any one of claims 1 to 7, wherein the number of the blades of the centrifugal wind wheel is 6 to 20.

Technical Field

The invention relates to the technical field of cooling towers, in particular to a low-rotation-speed centrifugal wind wheel cooling tower.

Background

At present, the cooling tower is designed and manufactured, and an axial flow wind wheel is generally selected as heat dissipation and ventilation equipment. However, after the external dimension of the cooling tower is determined, the diameter of the axial flow wind wheel is also determined, namely the diameter of the axial flow fan blade has an upper design limit. When the steam-water ratio influencing the heat dissipation capacity of the cooling tower is designed to be 0.62-0.67, the corresponding required air volume of the specified cooling flow is also determined, at the moment, the required heat dissipation ventilation air volume influencing the cooling tower mainly depends on the rotating speed of the wind wheel, and the larger the rotating speed is (the conventional working rotating speed of the axial flow wind wheel of the cooling tower is 230 and 400rpm, and the larger the diameter is, the lower the corresponding rotating speed is selected). Because the rotating speed is a main factor influencing the noise of the cooling tower, the higher the rotating speed of the wind wheel is, the larger the noise is, so the cooling tower pursues the high heat dissipation energy efficiency, and the cost of the influence of the noise on the environment is paid, which is a pair of contradictions. Therefore, the current cooling tower application generates a sound source for environmental pollution and is forced to carry out secondary noise control after product delivery. This phenomenon has been a problem that the investors, users, managers and users are worried about and cannot be recovered; and the enclosure mode that the noise secondary control is usually carried out to the cooling tower adopts can not reduce the influence of low frequency noise, but brings the cooling effect and is influenced.

Disclosure of Invention

Because the existing cooling tower is limited by the site size and the ventilation volume, the requirement of using lower rotating speed when ensuring the ventilation volume is difficult to realize only by the axial flow wind wheel. The invention aims to provide a cooling tower matched with a low-rotating-speed centrifugal wind wheel, which adopts a centrifugal wind wheel with lower rotating speed and large air volume to supply air, so that the centrifugal wind wheel is kept at the rotating speed of 60-180 revolutions per minute, and the necessary ventilation volume of the cooling tower is ensured and the low-noise ventilation operation is realized.

Low rotational speed centrifugal wind wheel cooling tower, including the tower body, the tower body has air intake and air outlet, be equipped with filler district in the tower body, filler district is located between air intake and the air outlet, air outlet department installs centrifugal wind wheel, centrifugal wind wheel admits air along the axis, exhausts along blade outer fringe week, centrifugal wind wheel's operating speed is 60 to 180 rotations per minute. The working rotating speed of the centrifugal wind wheel is maintained in the range of 60-180 revolutions per minute by configuring the motor with low rotating speed and large torque, and the cooling tower can meet the necessary ventilation quantity and realize low-noise operation at the same time.

Further, the centrifugal wind wheel can be provided with or without wind guide parts at the periphery according to the specific requirements of the working conditions of the cooling tower. When the wind guide part is not arranged, the airflow exhausts and dissipates heat along the circumferential direction of the centrifugal wind wheel, and the blades of the centrifugal wind wheel are backward inclined centrifugal blades. When the air guide part is arranged, the heat-dissipating air flow can be guided to a specific direction, and the blades of the centrifugal wind wheel are forward-inclined centrifugal blades. If the air outlet direction of the air duct is vertical to the rotating shaft direction of the centrifugal wind wheel, the area of an air outlet of the air duct is larger than the air outlet area of the centrifugal wind wheel; if the air exhaust steam flow direction is consistent with the rotation axis of the centrifugal wind wheel for air exhaust, a gap is formed between the air duct and the centrifugal wind wheel, and the gap is more than 10% of the diameter size of the centrifugal wind wheel. The air exhaust area refers to the circumferential area of the centrifugal wind wheel.

Further, the number of the blades of the centrifugal wind wheel is 6-20.

This technical scheme utilizes low rotational speed centrifugal wind wheel to replace traditional axial compressor wind wheel, under the prerequisite of guaranteeing same wheel outer fringe diameter and air volume requirement, drives centrifugal wind wheel air supply through the power supply of the big moment of torsion of configuration low rotational speed, makes centrifugal wind wheel keep in the low rotational speed operation of 60 to 180 rotations per minute to realize cooling tower low noise, more approach the environmental protection noise requirement.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures are only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from them without inventive effort.

FIG. 1 is a schematic front view of a low-speed centrifugal wind wheel cooling tower in embodiment 1 (the driving source for driving the centrifugal wind wheel is omitted);

FIG. 2 is a schematic top view of the structure of the low-speed centrifugal wind wheel cooling tower according to embodiment 1 (the driving source for driving the centrifugal wind wheel is omitted);

fig. 3 is a schematic front view of a structure of a low-speed centrifugal wind wheel (axial air duct) cooling tower in embodiment 2 (the driving source for driving the centrifugal wind wheel is omitted);

fig. 4 is a schematic top view of the structure of the low-speed centrifugal wind wheel (axial air duct) cooling tower in embodiment 2 (the driving source for driving the centrifugal wind wheel is omitted).

Detailed Description