Air-air cooler applied to phase modifier

Abstract

The utility model discloses an air-air cooler applied to a phase modifier, which relates to the technical field of phase modifier cooling and comprises a heat exchange core mounted in a body, internal circulation frequency conversion fans at the tops of two sides and a plurality of groups of external circulation frequency conversion fans at an air outlet. Cooling gas is blown into the two ends of a phase modifier stator and rotor winding from one end of the heat exchange core body through the internal circulation frequency conversion fan along a downward internal cooling channel formed by the partition plates in a surrounding mode, and after cooling is completed through the cooling loop, the cooling gas flows back to the other end of the heat exchange core body from the back of the stator iron core to form a heat exchange internal circulation. The multiple sets of outer circulation frequency conversion fans are communicated with outside cold air through the air outlets to form outer circulation to be responsible for cooling the heat exchange core. The utility model not only can be widely applied to the environment with less water and water shortage and the relative sealing of the interior of the phase modifier, but also can prevent external foreign matters and dust from entering the stator and rotor coils and the iron core, and the cooling efficiency can be further improved by arranging the cooling air path and controlling the rotating speed of the fan through frequency conversion.

Description

Technical Field

[0001] The utility model relates to the technical field of phase regulator cooling, and more specifically to an air-to-air cooler applied to phase regulators. Background Art

[0002] At present, the stator and rotor coils and cores of the phase regulator are all cooled by air, which is subdivided into two methods: air-water cooler and open air cooling. The air-water cooler directly removes the heat of the air inside the phase regulator through circulating water, and the cooling effect is better, but this cooling method requires a matching cooling water system, which is costly and cannot meet the requirements in an environment with little water and rain. For open air-cooled phase regulators, there is a large space connecting the inside and outside of the phase regulator, and the external air is directly used to remove the heat of the phase regulator, but the quality of the external air is required to be high.

[0003] In the prior art, there is a phase shifter air-to-air cooling system with a publication number of CN215120453U, in which the air outlet of the phase shifter body is connected to the air inlet of the inner circulation pipe, the air inlet of the phase shifter body is connected to the air outlet of the inner circulation pipe, and the inner circulation pipe is provided with an inner circulation fan; one end of the outer circulation air inlet is connected to the outside, and the other end of the outer circulation air inlet is connected to the heat exchange core, and the outer circulation air inlet is provided with an outer circulation fan. This structure only performs overall cooling through double circulation, and does not design a specific air path to effectively cool the stator and rotor coils and iron core of the phase shifter, which is the main heat generating part, and has low efficiency. Now, there is an urgent need for a cooling device for the stator and rotor coils and iron core of the phase shifter that can efficiently cool the stator and rotor coils of the phase shifter. Utility Model Content

[0004] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the utility model is to provide a double-circulation air-to-air cooler applied to a phase regulator, which adopts cooling circuits for cooling the rotor and the stator respectively to cool the phase regulator, thereby effectively improving the cooling efficiency.

[0005] In order to achieve the above objectives, the technical solution adopted by the utility model is:

[0006] An air-to-air cooler for a phase regulator comprises an air-to-air cooler body, characterized in that it also comprises a heat exchange core installed inside the body, internal circulation variable frequency fans on the tops of both sides and multiple sets of external circulation variable frequency fans at the air outlets, cooling gas is blown from one end of the heat exchange core by the internal circulation variable frequency fans along the downward internal cooling channel surrounded by partitions to the two ends of the phase regulator stator and rotor windings, and after being cooled by the cooling circuit, it flows back to the other end of the heat exchange core from the back of the stator core to form an internal heat exchange cycle, and multiple sets of external circulation variable frequency fans are connected to the external cold air through the air outlets to form an external cycle responsible for cooling the heat exchange core;

[0007] A plurality of support columns installed on the ground are arranged at the bottom edge of the air-to-air cooler body, and the support columns set up the air-to-air cooler body just above the phase modulator base.

[0008] Preferably, the cooling circuit includes a first cooling circuit for cooling the stator and a second cooling circuit for cooling the rotor.

[0009] Preferably, a sealing ring is provided at the connection between the external circulation variable frequency fan and the air outlet, and a soft connection seal is adopted between the air-to-air cooler body and the phase regulator.

[0010] Preferably, the air-to-air cooler body is also provided with a connection terminal.

[0011] Preferably, the cross section of the support column is rectangular or circular.

[0012] Preferably, the heat exchange core is made of galvanized sheet with an anti-corrosion coating.

[0013] Preferably, the heat exchange core is a box-plate structure.

[0014] Preferably, the height of the support column is higher than the height of the phase modulator body.

[0015] Preferably, reinforcing ribs are provided at the bottom of the support column.

[0016] Preferably, the support column is made of alloy steel.

[0017] Beneficial effects of the utility model:

[0018] 1. Compared with the prior art, the present application designs a cooling circuit for the stator and rotor coils and the core of the main heat-generating phase regulator, and forms a circulation channel through partitions so that the cooling air can reach all designated points, thereby improving the cooling efficiency. Circuits for cooling the stator and rotor coils and the core are respectively provided, which are highly targeted and efficient.

[0019] 2. In the utility model, the present application adopts an air-to-air cooler to cool the internal structure of the phase shifter, combining the advantages of an air-to-water cooler and an open air cooling. Compared with the phase shifter adopting an air-to-water cooler, the phase shifter is cooled without relying on an external cooling water system, has a wider applicable environment, and has lower maintenance and construction costs. Compared with the open air-cooled phase shifter, the internal air quality of the phase shifter is higher, the heat exchange capacity is larger, and the maintenance cost is lower.

[0020] 3. In the present invention, the internal and external circulation fans of the air-to-air cooler adopt variable frequency motors. The variable frequency control of the fan speed can further reduce the power consumption of the phase regulator and improve the efficiency of the phase regulator.

[0021] 4. In the utility model, the bottom of the air-to-air cooler is designed with support columns and ground supports to fully bear the weight of the air-to-air cooler. The arrangement of reinforcing ribs and the use of alloy steel can ensure stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the cooling air path principle of the utility model;

[0024] Reference numerals:

[0025] 1. Air-to-air cooler body; 2. Internal circulation variable frequency fan; 3. External circulation variable frequency fan; 4. Terminal block; 5. Support column; 6. Heat exchange core; 7. Stator and rotor windings; 701. Rotor guard ring; 702. Air gap; 703. Stator; 704. Rotor; 705. Stator coil. DETAILED DESCRIPTION

[0026] The concept, specific structure and technical effects of the present invention will be clearly and completely described below in combination with the embodiments and drawings to fully understand the purpose, features and effects of the present invention.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown, the present embodiment provides an air-to-air cooler for use in a phase regulator, comprising an air-to-air cooler body 1, characterized in that it also comprises a heat exchange core 6 installed inside the body, internal circulation variable frequency fans 2 at the tops of both sides, and multiple sets of external circulation variable frequency fans 3 at the air outlets. The cooling gas starts from one end of the heat exchange core 6 and is blown by the internal circulation variable frequency fans 2 along the downward internal cooling channel surrounded by partitions to the two ends of the phase regulator stator and rotor windings 7. The present application designs a cooling circuit for the stator and rotor coils and the core of the phase regulator, which is the main heat generating component. The circulation channel is surrounded by partitions so that the cooling air can all reach the designated points, thereby improving the cooling efficiency. The rotor winding 7 will generate heat through friction during operation. Overheating will affect the output of the entire phase regulator. After cooling through the cooling circuit, it will flow back from the back of the stator 703 to the other end of the heat exchange core 6 to form an internal heat exchange cycle. Multiple groups of external circulation variable frequency fans 3 are connected to the outside cold air through the air outlet to form an external circulation responsible for cooling the heat exchange core 6. The air path of the entire air-to-air cooler includes an internal circulation air path and an external circulation air path. Driven by the internal circulation variable frequency fan 2, the gas circulates in the closed system of the phase regulator. The heat absorbed by the gas is exchanged through the heat exchange core 6 of the air-to-air cooler, and then taken away by the cold air in the external circulation air path.

[0029] In the prior art, the air driving force for the internal circulation is the fan installed on the phase regulator rotor. When the rotor rotates, it drives the air in the fan driver to circulate. Since the phase regulator is a synchronous motor, the rotor speed is constant and the fan loss is fixed. Removing the mechanical fan and using an external variable frequency fan to replace the mechanical fan on the traditional rotor can also reduce mechanical losses.

[0030] The cooling circuit includes a first cooling circuit for cooling the stator and a second cooling circuit for cooling the rotor. The first cooling circuit enters from the end of the stator winding, a part of which directly cools the end of the stator coil and then merges into the internal circulation air path of the stator core back, and the other part enters the air gap 702 between the stator coil 705 and the rotor guard ring 701, and then is discharged from the core air duct of the stator 703 to the core back; the second cooling circuit enters the rotor winding from under the rotor guard ring 701, a part of the cooling gas passes through the cooling air duct composed of the insulating pads between the adjacent end windings to cool the end of the rotor winding and then is discharged from both ends, and the other part enters the rotor winding slot from the rotor auxiliary slot, and then flows out from the radial exhaust holes of the rotor body to the air gap 702 and merges with the first cooling circuit. Circuits for cooling the stator and rotor coils and the core are respectively provided, which are highly targeted and efficient.

[0031] The air-to-air cooler body 1 is also provided with a wiring terminal 4, which uniformly controls the circuit switch, including the opening and closing of the internal circulation variable frequency fan 2 and the external circulation variable frequency fan 3, and also controls the opening of the inverter, which is simple to operate and avoids accidental touch.

[0032] As an implementation method of this embodiment, a sealing ring is provided at the connection between the external circulation fan 3 and the air outlet, and a soft connection seal is used between the air-to-air cooler body 1 and the phase regulator, which can not only seal the connection but also provide a certain degree of flexibility, forming a closed space to prevent external foreign matter and dust from entering the stator and rotor coils and the core to affect the output of the phase regulator.

[0033] Example 2

[0034] This embodiment is further described on the basis of embodiment 1.

[0035] As an implementation method of this embodiment, the heat exchange core 6 is made of galvanized sheet with anti-corrosion coating, and the heat exchange core 6 is a box plate structure. The heat exchange core 6 is a box plate structure, which is simple and compact, easy to clean, and quick to replace. The heat exchange core 6 is made of galvanized sheet with anti-corrosion coating and has high pressure resistance.

[0036] As an implementation method of this embodiment, a plurality of support columns 5 installed on the ground are provided at the bottom edge of the air-to-air cooler body 1, and the support columns 5 set up the air-to-air cooler body 1 directly above the phase modulator base. The height of the support columns 5 is higher than the height of the phase modulator body, and the support columns 5 are provided to fully bear the weight of the air-to-air cooler. After installation, a certain gap must be ensured between the phase modulator body and the air-to-air cooler body 1.

[0037] The cross section of the support column 5 is rectangular or circular, and a reinforcing rib is arranged at the bottom of the support column 5. The support column 5 is made of alloy steel to further ensure the strength of the support column.

[0038] The implementation methods of the present invention are described in detail above, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. An air-to-air cooler for use in a phase condenser, comprising an air-to-air cooler body (1), characterized in that: It also includes a heat exchange core (6) installed inside the main body, internal circulation variable frequency fans (2) on the top of both sides, and multiple sets of external circulation variable frequency fans (3) at the air outlet. Cooling gas is blown from one end of the heat exchange core (6) by the internal circulation variable frequency fan (2) along the downward internal cooling channel surrounded by partitions to the two ends of the phase shifter stator and rotor winding (7). After cooling through the cooling circuit, it flows back from the back of the stator (703) to the other end of the heat exchange core (6) to form an internal heat exchange cycle. The multiple sets of external circulation variable frequency fans (3) are connected to the outside cold air through the air outlet to form an external cycle responsible for cooling the heat exchange core (6); A plurality of support columns (5) mounted on the ground are arranged at the bottom edge of the air-to-air cooler body (1), and the support columns (5) set up the air-to-air cooler body (1) directly above the phase modulator base.

2. The air-to-air cooler used in a phase regulator according to claim 1, characterized in that: The cooling circuit includes a first cooling circuit for cooling the stator and a second cooling circuit for cooling the rotor.

3. The air-to-air cooler used in a phase regulator according to claim 2, characterized in that: The first cooling circuit enters from the end of the stator winding, a part of which directly cools the end of the stator coil and then merges into the internal circulation air path of the stator core back, and the other part enters the air gap (702) from between the stator coil (705) and the rotor guard ring (701), and then is discharged from the stator (703) core air duct to the core back; the second cooling circuit enters the rotor winding from under the rotor guard ring (701), a part of the cooling gas passes through the cooling air duct formed by the insulating pads between the adjacent end windings to cool the end of the rotor winding and then is discharged from both ends, and the other part enters the rotor winding slot from the rotor auxiliary slot, and then flows out from the radial exhaust holes of the rotor body to the air gap (702) and merges with the first cooling circuit.

4. An air-to-air cooler for phase regulator according to any one of claims 1 to 3, characterized in that: A sealing ring is provided at the connection between the external circulation variable frequency fan (3) and the air outlet, and a soft connection seal is adopted between the air-to-air cooler body (1) and the phase regulator.

5. An air-to-air cooler for phase condenser according to any one of claims 1 to 3, characterized in that: The air-to-air cooler body (1) is also provided with a wiring terminal (4).

6. An air-to-air cooler for phase regulator according to any one of claims 1 to 3, characterized in that: The heat exchange core (6) is a box-plate structure.

7. An air-to-air cooler for phase condenser according to any one of claims 1 to 3, characterized in that: The heat exchange core (6) is made of galvanized sheet with an anti-corrosion coating.

8. An air-to-air cooler for phase condenser according to any one of claims 1 to 3, characterized in that: The height of the support column (5) is higher than the height of the phase regulator body.

9. An air-to-air cooler for phase condenser according to any one of claims 1 to 3, characterized in that: The bottom of the support column (5) is provided with reinforcing ribs.

10. An air-to-air cooler for phase condenser according to any one of claims 1 to 3, characterized in that: The support column (5) is made of alloy steel.

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