Auxiliary cooling device of generator

Abstract

The utility model discloses an auxiliary cooling device for a generator, which relates to the technical field of cooling devices, and comprises a stator, a heat dissipation assembly arranged in the stator and an auxiliary assembly arranged on the back surface of the stator, the auxiliary assembly comprises an auxiliary cooling device, and a thin fin is arranged at the center of the auxiliary cooling device. A water inlet and a water outlet are formed in the auxiliary cooling device, a water cooling pipeline is arranged in the auxiliary cooling device, and the two ends of the water cooling pipeline are communicated with the water inlet and the water outlet respectively; according to the utility model, the auxiliary assembly is arranged to reduce the inlet air temperature of the generator so as to reduce the internal temperature of the generator and reduce the influence of temperature rise on the power of the generator.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling devices, in particular to an auxiliary cooling device for a generator. Background Art

[0002] During the operation of a modern generator, current passing through the coil will generate a magnetic field, which excites the rotor to rotate, and the resistance of the copper wire will cause the coil to heat up, which is one of the main reasons for the heating of the generator. The greater the resistance, the greater the heat generated, and the iron core will undergo magnetization and magnetic reversal in the magnetic field, thereby generating hysteresis and loss. These hysteresis and losses cause the iron core to generate heat, which will be further conducted to other parts of the generator. When the generator is running at high speed, friction will occur between the rotor and the stator, thereby generating heat. At the same time, air resistance will also cause friction between the rotor and the stator surface, further increasing its heat generation.

[0003] Currently, the heat dissipation method of most generators on the market is to set fan blades on the rotor to dissipate heat through the flow of air. Although this solution has a simple structure, is easy to produce and manufacture, and has low cost, its heat dissipation efficiency is also low, and its heat dissipation effect is greatly affected by the ambient temperature. When working in an area with high room temperature, its heat dissipation effect will be greatly reduced.

[0004] In a few special occasions, the generator is equipped with a water-cooling pipe in the stator to allow cooling water to swirl through the stator, and then absorb heat for dissipation through the cooling water at a lower temperature. Although this solution has a compact structure, small dimensions, greatly improved heat dissipation efficiency, and is almost unaffected by ambient temperature, it is difficult to process, has a low yield rate, and is difficult to mass produce. At the same time, the price is much higher than that of the air-cooled structure.

[0005] In view of this, this application is hereby filed. Utility Model Content

[0006] The utility model aims to provide a generator auxiliary cooling device to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the utility model provides an auxiliary cooling device for a generator, comprising a stator, a heat dissipation component installed in the stator, and an auxiliary component installed on the back of the stator, the auxiliary component comprising an auxiliary cooling device, a thin fin is arranged at the center of the auxiliary cooling device, a water inlet and a water outlet are arranged on the auxiliary cooling device, a water cooling pipe is arranged in the auxiliary cooling device, and both ends of the water cooling pipe are respectively connected to the water inlet and the water outlet.

[0008] Furthermore, a ventilation slot is provided at the center of the front side of the auxiliary cooling device and extends to the back side thereof. There are a plurality of thin fins, and the plurality of thin fins are arranged in the ventilation slot in a linear array at equal intervals.

[0009] Furthermore, the water cooling pipe is spirally arranged, and enters from one side of the auxiliary cooling device, bends back after passing through the thin fins, and docks with the water outlet after its position coincides with the water outlet.

[0010] Furthermore, the heat dissipation component includes a rotor, which is rotatably connected to the stator and is provided with fan blades.

[0011] Furthermore, the fan blade is divided into an outer ring, a connecting plate and an inner ring. The inner ring is fixedly connected to the rotor. One end of the connecting plate is fixedly connected to the inner ring. The connecting plate is inclined. The other end of the connecting plate is fixedly connected to the outer ring. There are multiple connecting plates arranged in a circular array with equal spacing.

[0012] Furthermore, a protective net is arranged on the front side of the stator, a plurality of mesh holes are formed on the side wall of the protective net, and an inner wall of the protective net is gap-connected with an outer ring of a fan blade.

[0013] Furthermore, it also includes fasteners, and the auxiliary cooling device and the stator, and the stator and the protective net are fixedly connected by fasteners. The fasteners include gaskets connected to the auxiliary cooling device or the stator or the protective net, and bolts threadedly connected to two corresponding gaskets.

[0014] Furthermore, a connecting piece is provided on the outer wall of the stator, and there are two connecting pieces, which are symmetrically installed at the lower ends of both sides of the outer wall of the stator by welding.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By providing auxiliary components and lowering the air inlet temperature of the generator, the temperature inside the generator can be lowered, thereby reducing the impact of the temperature increase on the power of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a front view of a generator auxiliary cooling device;

[0018] Figure 2 is a rear view of a generator auxiliary cooling device;

[0019] Figure 3 The figure is a schematic diagram of the cross-sectional structure of a generator auxiliary cooling device.

[0020] In the figure: 1. auxiliary cooling device; 101. water inlet; 102. water outlet; 103. water cooling pipe; 2. thin fins; 3. stator; 301. rotor; 302. fan blades; 4. protective net; 5. fasteners; 6. connecting parts. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-3 The utility model provides a technical solution: it includes a stator 3, a heat dissipation component installed in the stator 3, the heat dissipation component includes a rotor 301, the rotor 301 is rotatably connected to the stator 3, a fan blade 302 is arranged on the rotor 301, the fan blade 302 is divided into an outer ring, a connecting piece and an inner ring, the inner ring is fixedly connected to the rotor 301, one end of the connecting piece is fixedly connected to the inner ring, the connecting piece is inclined, and the other end of the connecting piece is fixedly connected to the outer ring, and a plurality of connecting pieces are arranged in a circular array with equal spacing, and the wind direction of the heat dissipation component is blowing from back to front.

[0023] By adopting the above design, when the generator starts, the rotor 301 rotates, thereby driving the inner ring set on the rotor 301 to rotate, thereby driving the inclined connecting piece to rotate. When the connecting piece rotates, it can guide the air to flow from the back of the stator 3 to the front, and then the heat on the generator is taken away by the flowing air, thereby achieving cooling of the generator.

[0024] And an auxiliary component installed on the back of the stator 3, the auxiliary component includes an auxiliary cooling device 1, a water inlet 101 and a water outlet 102 are arranged on the auxiliary cooling device 1, a water cooling pipe 103 is arranged in the auxiliary cooling device 1, the water inlet 101 is connected to the water outlet 102 of the water pump, the water cooling pipe 103 is connected to the water suction port of the water pump, the water pump is located in the cooling box, and a refrigeration semiconductor is arranged in the cooling box, the two ends of the water cooling pipe 103 are respectively connected to the water inlet 101 and the water outlet 102, the water cooling pipe 103 is arranged in a spiral, the water cooling pipe 103 enters from one side of the auxiliary cooling device 1, bends back after passing through the thin fin 2, and is connected to the water outlet 102 after its position coincides with the water outlet 102, a thin fin 2 is arranged at the center of the auxiliary cooling device 1, a ventilation slot is opened at the center of the front of the auxiliary cooling device 1 and runs through the back thereof, there are multiple thin fins 2, and multiple thin fins 2 are arranged in the ventilation slot in a linear array at equal intervals.

[0025] By adopting the above design, when the generator is started, the heat dissipation component is synchronously started to guide the air flow. At this time, the refrigeration semiconductor can be started, and then the water pump is started to inject cold water into the water cooling pipe 103 through the water inlet 101, and the cold water is pumped out through the water outlet 102. When the cold water passes through the water cooling pipe 103, it reciprocates through the thin fins 2, and then takes away the temperature on the thin fins 2. As a result, when the heat dissipation component guides the air to pass through the auxiliary cooling device 1 and flow into the front of the stator 3, the air will first contact the thin fins 2 and be cooled by the thin fins 2, and then can flow into the front of the stator 3. In this way, by reducing the temperature of the incoming air, the heat dissipation component is assisted in heat dissipation, thereby reducing the influence of room temperature on the heat dissipation efficiency of the heat dissipation component.

[0026] See also Figure 1-3 Furthermore, a protective net 4 is provided on the front of the stator 3 , a plurality of mesh holes are provided on the side wall of the protective net 4 , and an inner wall of the protective net 4 is gap-connected with an outer ring of the fan blade 302 .

[0027] By providing the protective net 4, the fan blade 302 can operate in a relatively closed space, which can prevent debris such as paper or leaves from entering the rotation range of the fan blade 302, causing the high-speed rotating fan blade 302 to collide with the above-mentioned debris and be damaged, and can prevent the staff from accidentally touching it with their palms and causing personal injury.

[0028] For further information, see Figure 1-3 , and also includes a fastener 5. The auxiliary cooling device 1 and the stator 3, and the stator 3 and the protective net 4 are fixedly connected by the fastener 5. The fastener 5 includes a gasket connected to the auxiliary cooling device 1 or the stator 3 or the protective net 4, and a bolt threadedly connected to two corresponding gaskets.

[0029] By using fasteners 5 to connect the auxiliary cooling device 1 and the stator 3 as well as the stator 3 and the protective net 4, when the protective net 4 needs to be removed to maintain the fan blades 302, or when the auxiliary cooling device 1 needs to be removed from the stator 3 to clean the thin fins 2, the bolts can be unscrewed from the gaskets, and then the auxiliary cooling device 1 or the protective net 4 can be removed from the stator 3, thereby making the maintenance of the device more convenient.

[0030] In addition, reference Figure 1 and Figure 2 A connecting piece 6 is provided on the outer wall of the stator 3. There are two connecting pieces 6, which are symmetrically installed at the lower ends of both sides of the outer wall of the stator 3 by welding.

[0031] By providing the connecting member 6, when installing the stator 3, the bolts can be passed through the connecting member 6 and then threadedly connected to other surfaces such as a wall or a corresponding mounting block, so that the device can be installed upside down or on a wall or other inclined surfaces, thereby expanding the installation range of the device and improving the practicality of the device.

[0032] Working principle:

[0033] First, the auxiliary cooling device 1 is assembled on the stator 3 with bolts. Cooling water flows through the water pipe from the water inlet 101 and circulates. The cooling water exchanges heat with the thin fins 2, absorbs the heat of the thin fins 2, and then heats up, and then flows out from the water outlet 102 to take away the heat of the thin fins 2.

[0034] The air passes through the gap in the middle of the thin fin 2, exchanges heat with the thin fin 2, and is cooled down. Then, the air flows through the gap between the rotor 301 and the stator 3 of the generator to cool the rotor 301 and the stator 3. The air absorbs the heat of the rotor 301 and the stator 3 and its temperature rises. The rotor 301 is connected to the engine and rotates at a high speed together with the engine. The fan blades 302 and the rotor 301 are pressed into a whole. The fan blades 302 rotate at a high speed along with the rotor 301. The high-temperature air absorbed from the rotor 301 and the stator 3 is squeezed outward under the centrifugal force of the high-speed rotation of the fan blades 302, and the high-temperature air is discharged from the holes in the protective net 4. This reciprocating cycle reaches a steady-state equilibrium point.

Claims

1. A generator auxiliary cooling device, comprising a stator (3), a heat dissipation component installed in the stator (3), and an auxiliary component installed on the back of the stator (3), characterized in that: The auxiliary component comprises an auxiliary cooling device (1), a thin fin (2) is arranged at the center of the auxiliary cooling device (1), a water inlet (101) and a water outlet (102) are arranged on the auxiliary cooling device (1), a water cooling pipe (103) is arranged in the auxiliary cooling device (1), and two ends of the water cooling pipe (103) are respectively connected to the water inlet (101) and the water outlet (102).

2. A generator auxiliary cooling device according to claim 1, characterized in that: A ventilation slot extending from the front center of the auxiliary cooling device (1) to the back thereof is provided, and a plurality of thin fins (2) are provided, and the plurality of thin fins (2) are arranged in the ventilation slot in a linear array at equal intervals.

3. A generator auxiliary cooling device according to claim 2, characterized in that: The water cooling pipe (103) is arranged in a spiral shape. The water cooling pipe (103) enters from one side of the auxiliary cooling device (1), bends back after passing through the thin fins (2), and docks with the water outlet (102) after its position coincides with the water outlet (102).

4. A generator auxiliary cooling device as claimed in claim 3, characterized in that: The heat dissipation component comprises a rotor (301), the rotor (301) is rotatably connected to the stator (3), and a fan blade (302) is arranged on the rotor (301).

5. A generator auxiliary cooling device according to claim 4, characterized in that: The fan blade (302) is divided into an outer ring, a connecting piece and an inner ring. The inner ring is fixedly connected to the rotor (301). One end of the connecting piece is fixedly connected to the inner ring. The connecting piece is arranged obliquely. The other end of the connecting piece is fixedly connected to the outer ring. There are multiple connecting pieces arranged in a circular array at equal intervals.

6. A generator auxiliary cooling device according to claim 5, characterized in that: A protective net (4) is arranged on the front of the stator (3), a plurality of mesh holes are provided on the side wall of the protective net (4), and the inner wall of the protective net (4) is gap-connected to the outer ring of the fan blade (302).

7. A generator auxiliary cooling device according to claim 6, characterized in that: It also includes a fastener (5), wherein the auxiliary cooling device (1) and the stator (3), and the stator (3) and the protective net (4) are fixedly connected via the fastener (5), and the fastener (5) includes a gasket connected to the auxiliary cooling device (1) or the stator (3) or the protective net (4), and a bolt threadedly connected to two corresponding gaskets.

8. The auxiliary cooling device for a generator according to claim 7, characterized in that: A connecting piece (6) is provided on the outer wall of the stator (3), and there are two connecting pieces (6) which are symmetrically mounted on the lower ends of both sides of the outer wall of the stator (3) by welding.

Images