A ventilation and sealing structure for an exciter of a brushless excitation synchronous motor

Abstract

A ventilation and sealing structure for an exciter of a brushless excitation synchronous motor belongs to the technical field of motors, and is used to solve the problem that the large leakage of the cavity of the existing excitation motor base causes the exciter temperature to rise, and the long-term temperature rise exceeding the use range will cause the coil insulation to age. The invention comprises a base, an exciter base, a throat clamp and two hoses; the base is fixedly connected to the exciter base, an air inlet chamber and an air outlet chamber are provided on the base, the air inlet chamber is provided with a first air inlet and a first air outlet, the air outlet chamber is provided with a second air inlet and a second air outlet, an excitation air inlet chamber and an excitation air outlet chamber are provided on the exciter base, a fan is provided in the excitation air outlet chamber, the excitation air inlet chamber and the excitation air outlet chamber are respectively connected to the inner cavity of the exciter, an excitation air inlet is provided on the excitation air inlet chamber, an excitation air outlet is provided on the excitation air outlet chamber, and the excitation air inlet is connected to the first air outlet on the air inlet chamber through a hose.

Description

Technical Field

[0001] The invention relates to a sealing structure on a motor, in particular to a ventilation sealing structure of an exciter of a brushless excitation synchronous motor. Background Art

[0002] Many large brushless excitation synchronous motors use the coaxial split operation of the main engine and the exciter. Due to the split operation, the airflow into the motor first passes through the main engine, then flows into the chassis cavity, and finally flows into the exciter, and then flows back to the main engine as a cycle. During this process, the gas leaks a lot at the chassis cavity and the exciter. The effect of sealing with sealant is generally poor. The large leakage will make the purge device equipped with the motor unable to work, resulting in the increased safety or positive pressure housing type synchronous motor unable to start and run on site. In addition, the large leakage at the exciter will also cause the exciter temperature to rise. Long-term temperature rise above the use range will cause the coil insulation to age, resulting in coil pressure breakage and loss. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a ventilation and sealing structure for an exciter of a brushless excitation synchronous motor.

[0004] The technical solution adopted by the present invention to solve the above technical problems is:

[0005] A ventilation and sealing structure for an exciter of a brushless excitation synchronous motor comprises a base, an exciter base, a throat clamp and two hoses;

[0006] The base is fixedly connected to the exciter base, and a main chamber, an air inlet chamber and an air outlet chamber are provided on the base. The air inlet chamber is provided with a first air inlet and a first air outlet, and the air outlet chamber is provided with a second air inlet and a second air outlet. The first air inlet and the second air outlet are respectively connected to the main chamber.

[0007] An excitation air inlet chamber and an excitation air outlet chamber are provided on the excitation machine base, a fan is provided in the excitation air outlet chamber, the excitation air inlet chamber and the excitation air outlet chamber are respectively connected with the inner cavity of the excitation machine, an excitation air inlet is provided on the excitation air inlet chamber, an excitation air outlet is provided on the excitation air outlet chamber, the excitation air inlet is connected to the first air outlet on the air inlet chamber through a hose, the excitation air outlet is connected to the second air inlet on the air outlet chamber through a hose, and both ends of each hose are fixed by throat clamps.

[0008] Compared with the prior art, the present invention has the following beneficial effects:

[0009] The present invention provides a fan in the excitation air outlet chamber, through which the base airflow is sucked in from the first air inlet, flows out from the first air outlet into the excitation air inlet chamber on the base of the exciter, and then enters the inner cavity of the exciter from the air inlet chamber. The gas brings out the heat of the inner cavity of the exciter and enters the excitation air outlet chamber, and then flows out from the excitation air outlet in the air outlet chamber. The present invention connects the excitation air inlet and the excitation air outlet of the exciter with the air inlet chamber and the air outlet chamber on the base respectively through a hose, and fixes them through a throat clamp, with good sealing performance, simplicity and low cost, and solves the problem of aging of the insulating coil in the exciter due to high temperature of the exciter caused by large gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 is a schematic diagram of the present invention;

[0011] Figure 2 is a schematic diagram of base 1;

[0012] Figure 3 Schematic diagram of the exciter base 2. DETAILED DESCRIPTION

[0013] Example 1: Figure 1-Figure 3 As shown, the exciter ventilation sealing structure of a brushless excitation synchronous motor in this embodiment includes a base 1, an exciter base 2, a throat clamp 4 and two hoses 3;

[0014] The base 1 is fixedly connected to the exciter base 2. The base 1 is provided with a main chamber 13, an air inlet chamber 11 and an air outlet chamber 12. The air inlet chamber 11 is provided with a first air inlet 111 and a first air outlet 112. The air outlet chamber 12 is provided with a second air inlet 121 and a second air outlet 122. The first air inlet 111 and the second air outlet 122 are respectively communicated with the main chamber 13.

[0015] An excitation air inlet chamber 21 and an excitation air outlet chamber 22 are provided on the excitation machine base 2, and a fan is provided in the excitation air outlet chamber 22. The excitation air inlet chamber 21 and the excitation air outlet chamber 22 are respectively connected to the inner cavity of the excitation machine, and an excitation air inlet port 211 is provided on the excitation air inlet chamber 21, and an excitation air outlet port 221 is provided on the excitation air outlet chamber 22. The excitation air inlet port 211 is connected to the first air outlet port 112 on the air inlet chamber 11 through a hose 3, and the excitation air outlet port 221 is connected to the second air inlet port 121 on the air outlet chamber 12 through a hose 3, and both ends of each hose 3 are fixed by a throat clamp 4 respectively.

[0016] The air inlet chamber 11 and the air outlet chamber 12 of the base 1 can be welded by steel plates to form a sealed chamber, and the excitation air inlet chamber 21 and the excitation air outlet chamber 22 on the exciter base 2 can be made in the same way.

[0017] Embodiment 2: The difference between this embodiment and embodiment 1 is that each of the hoses 3 in this embodiment is a blue water hose.

[0018] Embodiment 3: The difference between this embodiment and embodiment 1 is that the throat clamp 4 in this embodiment is an American stainless steel throat clamp with a handle.

[0019] Embodiment 4: The difference between this embodiment and embodiment 1 is that: in this embodiment, the first air outlet 112, the second air inlet 121, the excitation air inlet 211 and the excitation air outlet 221 are all fixedly connected with round tubes, the round tube on the first air outlet 112 and the round tube on the excitation air inlet 211 are connected by a hose 3, the round tube on the second air inlet 121 and the round tube on the excitation air outlet 221 are connected by a hose 3, and the throat clamp 4 on each hose 3 is fixed on the round tube.

Claims

1. A ventilation and sealing structure for an exciter of a brushless excitation synchronous motor, characterized in that: It comprises a base (1), an exciter base (2), a throat clamp (4) and two hoses (3); The base (1) is fixedly connected to the exciter base (2); the base (1) is provided with a main chamber (13), an air inlet chamber (11) and an air outlet chamber (12); the air inlet chamber (11) is provided with a first air inlet (111) and a first air outlet (112); the air outlet chamber (12) is provided with a second air inlet (121) and a second air outlet (122); the first air inlet (111) and the second air outlet (122) are respectively communicated with the main chamber (13); An excitation air inlet chamber (21) and an excitation air outlet chamber (22) are provided on the excitation machine base (2); a fan is provided in the excitation air outlet chamber (22); the excitation air inlet chamber (21) and the excitation air outlet chamber (22) are respectively connected to the inner cavity of the excitation machine; an excitation air inlet port (211) is provided on the excitation air inlet chamber (21); an excitation air outlet port (221) is provided on the excitation air outlet chamber (22); the excitation air inlet port (211) is connected to a first air outlet port (112) on the air inlet chamber (11) via a hose (3); the excitation air outlet port (221) is connected to a second air inlet port (121) on the air outlet chamber (12) via a hose (3); and both ends of each hose (3) are fixed by a throat clamp (4).

2. The exciter ventilation and sealing structure of the brushless excitation synchronous motor according to claim 1, characterized in that: Each of the hoses (3) is a blue water hose.

3. The exciter ventilation and sealing structure of the brushless excitation synchronous motor according to claim 1, characterized in that: The throat clamp (4) is an American-style stainless steel throat clamp with a handle.

4. The exciter ventilation and sealing structure of the brushless excitation synchronous motor according to claim 1, characterized in that: The first air outlet (112), the second air inlet (121), the excitation air inlet (211) and the excitation air outlet (221) are all fixedly connected with round tubes; the round tube on the first air outlet (112) and the round tube on the excitation air inlet (211) are connected via a hose (3); the round tube on the second air inlet (121) and the round tube on the excitation air outlet (221) are connected via a hose (3); and the throat clamp (4) on each hose (3) is fixed on the round tube.

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