Permanent magnet synchronous motor cooling and power compensation device special for cooling tower

Abstract

The utility model discloses a special permanent magnet synchronous motor cooling and power compensation device for a cooling tower, which comprises the cooling tower, a permanent magnet synchronous motor and a water tank are arranged in the cooling tower, the water tank is fixedly connected to the bottom of the permanent magnet synchronous motor, a main shaft is arranged on the permanent magnet synchronous motor, and two ends of the main shaft penetrate out of the permanent magnet synchronous motor. The top end of the main shaft is provided with blades, and the bottom end of the main shaft is arranged in the water tank; a water inlet pipeline and a water outlet pipeline are arranged on the water tank; a water inlet valve is mounted on the water inlet pipeline; the device can cool the motor when the permanent magnet synchronous motor runs, and can provide power compensation for the motor, thereby saving the energy consumption of the motor.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a permanent magnet synchronous motor cooling and power compensation device dedicated to cooling towers. Background Art

[0002] Permanent magnet synchronous motors (PMSMs) are often used to drive cooling tower fans due to their compact size, high overall operating efficiency, and high power factor. Compared to traditional asynchronous starter motors, PMSMs utilize permanent magnets within the rotor for excitation, which avoids the excitation losses associated with the magnetic field generated by the excitation current. However, PMSMs generate significant internal heat during operation, which can easily lead to demagnetization of the permanent magnets within the rotor due to long-term exposure to high temperatures. Utility Model Content

[0003] The purpose of the utility model is to provide a permanent magnet synchronous motor cooling and power compensation device for cooling towers, which can cool the motor when the permanent magnet synchronous motor is running and provide power compensation for the motor, thereby saving motor energy consumption.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a permanent magnet synchronous motor cooling and power compensation device dedicated to a cooling tower, comprising a cooling tower, a permanent magnet synchronous motor and a water tank installed in the cooling tower, the water tank being fixedly connected to the bottom of the permanent magnet synchronous motor, a main shaft being provided on the permanent magnet synchronous motor, both ends of the main shaft passing through the permanent magnet synchronous motor, blades being installed on the top of the main shaft, and the bottom end of the main shaft being arranged in the water tank and equipped with an impeller; a water inlet pipe and a water outlet pipe being provided on the water tank, and a water inlet valve being installed on the water inlet pipe.

[0005] Optionally, the water inlet pipe is connected to the return water pipe of the cooling tower, and the water outlet pipe is connected to the water distribution main pipe of the cold zone tower.

[0006] Optionally, a support frame is fixedly connected to the bottom of the water tank, and the support frame is fixedly connected to the maintenance platform of the cooling tower.

[0007] Optionally, the water inlet pipe and the water outlet pipe are arranged on both sides of the water tank.

[0008] Optionally, the water inlet pipe and the water outlet pipe are staggered.

[0009] The utility model of the cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device has the following advantages:

[0010] (1) After the cooling water enters the water tank, it directly exchanges heat with the permanent magnet synchronous motor and the main shaft, achieving the effect of cooling the permanent magnet synchronous motor. Moreover, after the cooling water enters the water tank, it can also drive the impeller to rotate, and then drive the main shaft to rotate, compensating for the work done by the permanent magnet synchronous motor and enhancing the power of the permanent magnet synchronous motor.

[0011] (2) The water tank is connected to the water distribution system of the cooling tower, which improves the utilization rate of cooling water. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the present utility model.

[0013] Figure 2 It is a top view of the present utility model.

[0014] Figure 3 It is a schematic diagram of a permanent magnet synchronous motor.

[0015] Figure 4 This is a schematic diagram of the impeller installation. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] like Figures 1-4 As shown, a permanent magnet synchronous motor cooling and power compensation device for a cooling tower includes a cooling tower 1, in which a permanent magnet synchronous motor 2 and a water tank 3 are installed. The water tank 3 is fixedly connected to the bottom of the permanent magnet synchronous motor 2. The bottom of the water tank 3 is fixedly connected to a support frame 4, which is fixedly connected to the maintenance platform of the cooling tower 1 to ensure the stability of the permanent magnet synchronous motor 2. A main shaft 5 is vertically arranged in the permanent magnet synchronous motor 2, with both ends of the main shaft 5 extending through the permanent magnet synchronous motor 2. Blades 6 are installed at the top of the main shaft 5, and the bottom end of the main shaft 5 is arranged in the water tank 3 and equipped with an impeller 7. When the permanent magnet synchronous motor 2 is in operation, it drives the blades 6 to rotate.

[0018] The water tank 3 is provided with an inlet pipe 8 and an outlet pipe 9, and the inlet pipe 8 is installed with an inlet valve 10. The inlet pipe 8 and the outlet pipe 9 are arranged on both sides of the water tank 3 and are staggered. The inlet pipe 8 is connected with the return water pipe of the cooling tower 1, and the outlet pipe 9 is connected with the water distribution main pipe of the cold zone tower.

[0019] When the permanent magnet synchronous motor 2 drives the fan to operate, a portion of the cooling water in the return water pipe of the cooling tower 1 is diverted and enters the water tank 3 from the water inlet pipe 8. After entering the water tank 3, the cooling water exchanges heat with the permanent magnet synchronous motor 2 and the main shaft 5, thereby cooling the permanent magnet synchronous motor 2. The cooling water then flows out of the water tank 3 from the water outlet pipe 9 and then flows back to the original water distribution system of the cooling tower 1 through the water distribution main pipe, thereby improving the utilization rate of the cooling water. In the process of the cooling water flowing through the water tank 3, since the water inlet pipe 8 and the water outlet pipe 9 are staggered, the cooling water drives the impeller 7 to rotate well, thereby compensating for the work done by the main shaft 5 on the blades 6, increasing the power of the permanent magnet synchronous motor 2, saving the energy consumption of the permanent magnet synchronous motor 2, and achieving energy saving effects.

[0020] The embodiments described above are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

Claims

1. A cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device, comprising a cooling tower, characterized in that: A permanent magnet synchronous motor and a water tank are installed in the cooling tower. The water tank is fixedly connected to the bottom of the permanent magnet synchronous motor. A main shaft is provided on the permanent magnet synchronous motor. Both ends of the main shaft pass through the permanent magnet synchronous motor. Blades are installed on the top of the main shaft, and the bottom end of the main shaft is set in the water tank and is installed with an impeller; a water inlet pipe and a water outlet pipe are provided on the water tank, and an inlet valve is installed on the water inlet pipe.

2. The cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device according to claim 1, characterized in that: The water inlet pipe is connected to the return water pipe of the cooling tower, and the water outlet pipe is connected to the water distribution main pipe of the cold zone tower.

3. The cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device according to claim 1, characterized in that: The bottom of the water tank is fixedly connected with a support frame, and the support frame is fixedly connected to the maintenance platform of the cooling tower.

4. The cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device according to claim 1, characterized in that: The water inlet pipe and the water outlet pipe are arranged on both sides of the water tank.

5. The cooling tower dedicated permanent magnet synchronous motor cooling and power compensation device according to claim 4, characterized in that: The water inlet pipe and the water outlet pipe are staggered.

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