Cooling tower with permanent magnet direct drive motor

Abstract

The utility model relates to the technical field of cooling towers, and discloses a cooling tower with a permanent magnet direct drive motor, which comprises a base, a bottom frame is fixedly mounted on the base, and a framework is fixedly mounted on the bottom frame. When the cooling tower runs in summer, the external water replenishing valve is opened, cooling water is conveyed into the annular pipe through the water conveying hose and is directly sprayed to the surface of the motor through the spray head, so that the surface temperature of the motor is reduced, the energy efficiency of the motor is improved, and when the temperature is greatly reduced, the surface of the motor does not need to be cooled, and cooling water is directly replenished into the tower, so that the energy efficiency of the motor is improved. The cooling tower water supplementing source is used for reducing the surface temperature of the motor, the performance of the permanent magnet motor can be improved, the cost of the permanent magnet motor is reduced, the purposes of reducing cost and saving energy are achieved, the cooling tower water supplementing source is used for cooling the permanent magnet direct drive motor, the motor manufacturing cost is reduced, and normal operation of a system host can be guaranteed when the wet bulb temperature exceeds the design condition in summer. And the power consumption is low.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling towers, in particular to a cooling tower equipped with a permanent magnet direct drive motor. Background Technique

[0002] A cooling tower is a device that uses water as a circulating coolant to absorb heat from a system and discharge it into the atmosphere to reduce the water temperature. Its cooling principle is to use the heat exchange between water and air flow contact to generate steam, and the evaporation of the steam takes away heat to achieve evaporation heat dissipation, convective heat transfer and radiative heat transfer and other principles to dissipate the waste heat generated in industry or refrigeration air conditioning to reduce the water temperature, so as to ensure the normal operation of the system. The device is generally barrel-shaped, so it is called a cooling tower.

[0003] According to the Chinese patent with the publication number "CN111272005A", a cooling tower with a permanent magnet direct drive motor intelligent frequency conversion control includes a tower body and a water collection chassis. The bottom of the tower body is fixed with the water collection chassis by bolts. A packing support is inclinedly installed inside the tower body, and packing is filled in the packing support. The center of the top of the tower body is fixed with a fan protective cover by bolts. The beneficial effects are as follows: By adopting a water spraying nozzle for spraying and packing, the device has higher cooling capacity and prolongs the time for cooling water to pass through the tower body; by using a permanent magnet direct drive motor for driving, the rotation speed and torque can be adjusted according to needs, and the working noise of the device can also be reduced, thereby reducing energy consumption and environmental pollution.

[0004] In the existing cooling towers with permanent magnet direct drive motors, the cost of using permanent magnet direct drive motors is relatively high. Because the motor speed is low and directly drives the fan, the cost of permanent magnet motors is particularly high. In order to save costs, some manufacturers may not have a margin for the motor. Especially when the wet bulb temperature exceeds the design conditions in summer, it may cause a relatively high inlet water temperature of the system and more power consumption of the system. Therefore, a cooling tower equipped with a permanent magnet direct drive motor is proposed to solve the problem of high cost of permanent magnet direct drive motors. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a cooling tower equipped with a permanent magnet direct drive motor aiming at the deficiencies in the above-mentioned prior art.

[0006] To solve the above technical problem, the technical solution adopted by the utility model is: A cooling tower equipped with a permanent magnet direct drive motor, including a base, a chassis is fixedly installed on the base, a framework is fixedly installed on the chassis, a motor bracket is fixedly installed on the framework, and a motor is fixedly installed on the motor bracket;

[0007] A bottom groove is fixedly installed at the bottom of the chassis. A vortex preventer is fixedly installed inside the bottom groove. A cast iron joint is fixedly installed on the bottom groove. A water replenishing pipe is fixedly installed on the cast iron joint. A water conveying hose is fixedly installed on the water replenishing pipe. An annular pipe is fixedly connected to the outer wall of the motor. Nozzles are fixedly connected to the annular pipe. The water conveying hose is fixedly connected to the annular pipe. A wind casing is fixedly installed on the framework. A first temperature sensor is fixedly installed on the motor. A second temperature sensor is fixedly installed at the water inlet of the bottom groove.

[0008] Preferably, the motor is arranged inside the wind casing. A fan blade is fixedly installed on the output end of the motor. The wind casing can protect the motor.

[0009] Preferably, an overflow pipe is fixedly installed inside the bottom groove. The middle section of the water conveying hose is fixedly installed on the motor bracket. The motor bracket can facilitate the installation and fixation of the motor. At the same time, part of the water conveying hose can be fixed on the motor bracket to avoid the problem of the water conveying hose being scattered.

[0010] Preferably, a support frame is fixedly installed on the chassis. A control box is fixedly installed on the support frame. The support frame can support and fix the control box, facilitating the installation and fixation of the control box. The control box can facilitate the operation control of the cooling tower.

[0011] Preferably, a safety cage is fixedly installed on the framework. A guardrail is fixedly installed on the framework. A water distribution trough is fixedly installed on the framework. The safety cage can facilitate the staff to climb onto the framework and protect the climbing personnel. The guardrail can prevent maintenance personnel from falling from the top of the cooling tower, further improving the safety during the maintenance of the cooling tower.

[0012] Preferably, a radiator fin group is fixedly installed on the framework. The number of the radiator fin groups is two. The two radiator fin groups are respectively fixedly installed on the front and back of the framework. The radiator fin group can improve the cooling effect of the cooling tower.

[0013] The utility model adopts the above technical solutions and can bring the following beneficial effects:

[0014] The cooling tower equipped with a permanent magnet direct drive motor, when the cooling tower operates in summer, the external water replenishing valve is opened, and the cooling water is transported to the annular pipe through the water conveying hose and directly sprayed onto the surface of the motor through the nozzle, so as to reduce the surface temperature of the motor, improve the energy efficiency of the motor. When the temperature drops significantly, it is not necessary to cool the surface of the motor at this time, and the cooling water replenishment directly goes into the tower. By using the water replenishment source of the cooling tower to reduce the surface temperature of the motor, the performance of the permanent magnet motor can be improved, the cost of the permanent magnet motor can be reduced, so as to achieve the purpose of cost reduction and energy saving. By using the water replenishment source of the cooling tower to cool the permanent magnet direct drive motor, the manufacturing cost of the motor is reduced, ensuring that the main engine of the system can operate normally even when the wet bulb temperature in summer exceeds the design conditions, and the power consumption is also less. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic diagram of the position of the water distribution tank of the present utility model;

[0017] Figure 3 It is a schematic diagram of the internal structure of the present utility model;

[0018] Figure 4 is Figure 3 a schematic diagram of the structure at position A in

[0019] Figure 5 is Figure 3 a schematic diagram of the structure at position B in

[0020] Figure 6 It is a schematic diagram of the external cooling coil structure of the motor.

[0021] In the figure: 1, base; 2, framework; 3, chassis; 4, motor bracket; 5, bottom groove; 6, cast iron joint; 7, water supply pipe; 8, water conveying hose; 9, motor; 10, control box; 11, protective cage; 12, guardrail; 13, water distribution tank; 14, vortex preventer; 15, overflow pipe; 16, support frame; 17, wind casing; 18, radiator fin group; 19, annular pipe; 20, nozzle; 21, cooling coil; 22, first temperature sensor; 23, second temperature sensor. Detailed Implementation Manner

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Embodiment 1

[0026] Please refer to Figures 1-5 , the technical solution provided by the present utility model is: a cooling tower equipped with a permanent magnet direct drive motor, including a base 1, a chassis 3 is fixedly installed on the base 1, a framework 2 is fixedly installed on the chassis 3, a motor bracket 4 is fixedly installed on the framework 2, and a motor 9 is fixedly installed on the motor bracket 4;

[0027] A bottom groove 5 is fixedly installed at the bottom of the chassis 3. A vortex preventer 14 is fixedly installed inside the bottom groove 5. A cast iron joint 6 is fixedly installed on the bottom groove 5. A water replenishing pipe 7 is fixedly installed on the cast iron joint 6. A water conveying hose 8 is fixedly installed on the water replenishing pipe 7. An annular pipe 19 is fixedly connected to the outer wall of the motor 9. A nozzle 20 is fixedly connected to the annular pipe 19. The number of the nozzles 20 is 3 - 4, and they are arranged at equal intervals at the bottom of the annular pipe 19. When there are 3 nozzles 20, the interval between each adjacent nozzle 20 is 120°. When there are 4 nozzles 20, the interval between each adjacent nozzle 20 is 90°. The water conveying hose 8 is fixedly connected to the annular pipe 19. A wind casing 17 is fixedly installed on the framework 2. A first temperature sensor 22 is fixedly installed on the motor 9. Through the setting of the first temperature sensor 22, the real-time temperature of the motor 9 can be detected for controlling the spraying. A second temperature sensor 23 is fixedly installed at the water outlet of the bottom groove 5. The second temperature sensor 23 is a PT100 temperature sensor for real-time monitoring of the water temperature. When the cooling tower operates in summer, an external water replenishing valve is opened. Cooling water is conveyed from the water conveying hose 8 to the annular pipe 19 and directly sprayed onto the surface of the motor 9 through the nozzles 20, so as to reduce the surface temperature of the motor 9 and improve the energy efficiency of the motor 9. When the temperature drops significantly, it is not necessary to cool the surface of the motor 9 at this time. The cooling water replenishment directly goes into the tower, and the cooling water replenishment source of the cooling tower is used to reduce the surface temperature of the motor 9, which can improve the performance of the permanent magnet motor, reduce the cost of the permanent magnet motor, and achieve the purpose of cost reduction and energy conservation. By using the cooling water replenishment source of the cooling tower to cool the permanent magnet direct drive motor, it can ensure the normal operation of the system main engine even when the wet bulb temperature in summer exceeds the design conditions, and the power consumption is also less.

[0028] The motor 9 is arranged inside the wind casing 17. A fan blade is fixedly installed on the output end of the motor 9. Through the setting of the wind casing 17, the motor 9 can be protected.

[0029] An overflow pipe 15 is fixedly installed inside the bottom groove 5. The middle section of the water conveying hose 8 is fixedly installed on the motor support frame 4. Through the setting of the motor support frame 4, the installation and fixation of the motor 9 can be facilitated. At the same time, a part of the water conveying hose 8 can be fixed on the motor support frame 4 to avoid the problem of the water conveying hose 8 being scattered.

[0030] A support frame 16 is fixedly installed on the chassis 3. A control box 10 is fixedly installed on the support frame 16. Through the setting of the support frame 16, the control box 10 can be supported and fixed, facilitating the installation and fixation of the control box 10. Through the setting of the control box 10, the operation control of the cooling tower can be facilitated.

[0031] A protective cage 11 is fixedly installed on the framework 2, a guardrail 12 is fixedly installed on the framework 2, and a water dispersion trough 13 is fixedly installed on the framework 2. The provision of the protective cage 11 facilitates the staff to climb onto the framework 2, playing a role in protecting the climbing personnel. The provision of the guardrail 12 prevents maintenance personnel from falling from the top of the cooling tower, further improving the safety during the maintenance of the cooling tower.

[0032] Radiator fin groups 18 are fixedly installed on the framework 2. The number of the radiator fin groups 18 is two, and the two radiator fin groups 18 are respectively fixedly installed on the front and back of the framework 2. The provision of the radiator fin groups 18 can improve the cooling effect of the cooling tower.

[0033] Working principle: When the cooling tower operates in summer, by opening the external water supply valve, the cooling water enters the water supply pipe 7 and then enters the water delivery hose 8. It is transported by the water delivery hose 8 to the annular pipe 19 and directly sprayed onto the surface of the motor 9 through the nozzle 20, achieving the purpose of reducing the surface temperature of the motor 9, improving the energy efficiency of the motor 9. When the temperature drops significantly, at this time, it is not necessary to cool the surface of the motor 9, and the cooling water replenishment directly enters the tower, using the cooling tower water replenishment source to reduce the surface temperature of the motor 9.

[0034] Embodiment 2

[0035] Please refer to Figure 6 , on the basis of the above embodiment, the present invention further provides a technical solution: replacing the annular pipe 19 in the above technical solution with a cooling coil pipe 21. The cooling coil pipe 21 is fixedly connected to the water delivery hose 8, and the cooling coil pipe 21 is sleeved on the motor 9.

[0036] Working principle: When the cooling tower operates in summer, by opening the external water supply valve, the cooling water enters the water supply pipe 7 and then enters the water delivery hose 8. It is transported by the water delivery hose 8 to the cooling coil pipe 21. Since the cooling coil pipe 21 is sleeved on the motor 9, the purpose of reducing the surface temperature of the motor 9 can be achieved, improving the energy efficiency of the motor 9.

[0037] By adopting the method of spraying water on the motor 9 or the method of sleeving the cooling coil pipe 21 on the motor 9, the motor 9 can be cooled, reducing the heat generation of the motor 9. Under the same working conditions, a motor with a lower power can be used for operation.

[0038] The present invention provides a cooling tower equipped with a permanent magnet direct drive motor. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be realized by the existing technology.

Claims

1. A cooling tower equipped with a permanent magnet direct drive motor, comprising a base (1), characterized in that: A base frame (3) is fixedly mounted on the base (1), a frame (2) is fixedly mounted on the base frame (3), a motor frame (4) is fixedly mounted on the frame (2), and a motor (9) is fixedly mounted on the motor frame (4); A bottom trough (5) is fixedly mounted on the bottom of the base frame (3), a vortex preventer (14) is fixedly mounted inside the bottom trough (5), a cast iron joint (6) is fixedly mounted on the bottom trough (5), a water supply pipe (7) is fixedly mounted on the cast iron joint (6), a water supply hose (8) is fixedly mounted on the water supply pipe (7), an annular tube (19) is fixedly connected to the outer wall of the motor (9), a nozzle (20) is fixedly connected to the annular tube (19), the water supply hose (8) is fixedly connected to the annular tube (19), an air shroud (17) is fixedly mounted on the frame (2), a first temperature sensor (22) is fixedly mounted on the motor (9), and a second temperature sensor (23) is fixedly mounted at the water outlet on the bottom trough (5).

2. A cooling tower equipped with a permanent magnet direct drive motor according to claim 1, characterized in that: The motor (9) is arranged inside the fan shell (17), and a fan blade is fixedly mounted on the output end of the motor (9).

3. A cooling tower equipped with a permanent magnet direct drive motor according to claim 1, characterized in that: An overflow pipe (15) is fixedly installed inside the bottom tank (5), and the middle section of the water delivery hose (8) is fixedly installed on the motor frame (4).

4. A cooling tower equipped with a permanent magnet direct drive motor according to claim 1, characterized in that: A support frame (16) is fixedly mounted on the base frame (3), and a control box (10) is fixedly mounted on the support frame (16).

5. A cooling tower equipped with a permanent magnet direct drive motor according to claim 1, characterized in that: A guard cage (11) is fixedly mounted on the frame (2), a guardrail (12) is fixedly mounted on the frame (2), and a water trough (13) is fixedly mounted on the frame (2).

6. A cooling tower equipped with a permanent magnet direct drive motor according to claim 1, characterized in that: A heat sink group (18) is fixedly mounted on the frame (2), and there are two heat sink groups (18). The two heat sink groups (18) are respectively fixedly mounted on the front and back of the frame (2).

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