Generator air cooler and plate heat exchanger series heat exchange device

Abstract

The utility model discloses a generator air cooler and plate heat exchanger series heat exchange device, specifically related to heat exchange technical field, including the plate body, the plate body is assembled for realizing the series heat exchange of generator air cooler and plate heat exchanger series assembly. The utility model can real -time accurate control heat exchange medium flow, and the slide along the support frame reciprocatingly moves, in the process of slide, one side pushes the piston rod and slides in the first heat exchange cavity, changes the medium pressure in the cavity and adjusts the outflow rate, on the other side, the ejector rod drives the stop block to move, and the actual flow cross -sectional area of through -hole is adjusted. Through this cooperative adjustment mechanism, the medium flow can be flexibly adjusted according to the real -time heat generation of generator, realizes the heat dissipation on demand, avoids the energy waste when low load, and ensures that the heat dissipation capacity is sufficient when high load, and the energy utilization efficiency and working condition adaptability of device are improved obviously.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and more specifically, to a heat exchange device that connects a generator air cooler and a plate heat exchanger in series. Background Technology

[0002] During generator operation, the stator, rotor windings, and core generate a significant amount of heat due to electromagnetic and mechanical losses. Accumulated heat can lead to aging of insulation materials, decreased motor efficiency, and even burnout. The generator air cooler is a core component specifically designed for generator heat dissipation. Essentially, it's an "air-medium" heat exchanger, its core function being to cool the "circulating air" inside the generator. Plate heat exchangers are a highly efficient and versatile heat exchange device. Their core structure consists of multiple stacked, stamped "corrugated metal plates," forming tiny heat exchange channels between them. Efficient heat exchange is achieved through the counter-current flow of two fluids within these channels. Essentially, they are "fluid-fluid" heat exchangers, functioning to transfer heat between two fluids at different temperatures.

[0003] The cooling effect of a generator air cooler directly depends on the initial temperature of its cooling medium. If the medium temperature is too high, even if the air cooler heats up normally, it will not be able to reduce the hot air from the generator to the target temperature. Therefore, a generator air cooler and a plate heat exchanger are connected in series for heat exchange. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a heat exchange device for a generator air cooler and a plate heat exchanger in series, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a heat exchange device for a generator air cooler and a plate heat exchanger in series, including a plate body, on which a series assembly for realizing the series heat exchange between the generator air cooler and the plate heat exchanger is assembled. The series assembly includes a support frame fixedly installed on one side of the plate. The two ends of the support frame are respectively provided with a first heat exchange cavity for carrying the heat exchange medium, and the top of each first heat exchange cavity is correspondingly provided with a second heat exchange cavity integrally formed therewith. The second heat exchange cavity and the first heat exchange cavity together constitute a medium flow channel for series heat exchange. The bottom of the inner wall of the second heat exchange chamber is provided with a through hole for connecting the first heat exchange chamber and the second heat exchange chamber to ensure smooth flow of the heat exchange medium. The bottom of the inner wall of the second heat exchange chamber is provided with a baffle at the top of the through hole, which is used to adjust the flow rate of the heat exchange medium at the through hole.

[0006] Optionally, in one possible implementation, two sliding plates are slidably connected to the middle of the support frame along its length. The two sliding plates are symmetrically distributed, and the axis of each sliding plate is on the same horizontal plane as the axis of the first heat exchange chamber and the axis of the second heat exchange chamber, respectively. Both sliding plates have elongated holes that extend through them along their length. The length of the elongated holes matches the travel of the sliding plates, and a deflector wheel is slidably connected in each elongated hole. The outer peripheral wall of the deflector wheel is tightly fitted to the inner wall of the elongated hole to achieve stable sliding of the sliding plate when the deflector wheel rotates. The axis of the deflector wheel is eccentrically set. A motor for driving the deflector wheel to rotate is fixedly installed on the top of the plate by bolts. The motor can drive the deflector wheel to rotate clockwise or counterclockwise by forward and reverse rotation, thereby controlling the sliding plate to slide back and forth along the support frame. Optionally, in one possible implementation, the end of the stop block away from the through hole is fixedly connected to a push rod that penetrates the side wall of the second heat exchange chamber. A sealing element is provided between the push rod and the side wall of the second heat exchange chamber to prevent leakage of the heat exchange medium. A piston rod is slidably connected to one end of the first heat exchange chamber along its axial direction. The outer peripheral wall of the piston rod is tightly fitted with the inner wall of the first heat exchange chamber, and a sealing ring is provided between the piston rod and the first heat exchange chamber to ensure the sealing of the first heat exchange chamber. The end of the piston rod away from the first heat exchange chamber and the end of the push rod away from the stop block extend to one side of the corresponding slide plate, and wear-resistant gaskets are provided at the contact ends of the piston rod, the push rod and the slide plate. When the slide plate slides along the support frame, it can push the piston rod to slide in the first heat exchange chamber and push the push rod to drive the stop block to move in the second heat exchange chamber. A connector for connecting external pipelines is embedded on the outer side of the end of the first heat exchange chamber away from the piston rod and the outer side of the end of the second heat exchange chamber away from the push rod, respectively, so as to adapt and connect with the external thread of the external pipeline, thereby realizing the series connection of the generator air cooler and the plate heat exchanger. The technical effects and advantages of this utility model are as follows: A coordinated adjustment mechanism consisting of a motor, deflector, slide plate, piston rod, and push rod allows for real-time and precise control of the heat exchange medium flow rate. The sliding plate reciprocates along the support frame. During this movement, the slide plate pushes the piston rod to slide within the first heat exchange chamber, changing the medium pressure within the chamber to regulate the outflow rate. Simultaneously, it pushes the push rod to move the stop block, adjusting the actual flow cross-sectional area of ​​the through-hole. This coordinated adjustment mechanism allows for flexible adjustment of the medium flow rate based on the generator's real-time heat output, achieving on-demand heat dissipation. This avoids energy waste under low load conditions while ensuring sufficient heat dissipation capacity under high load conditions, significantly improving the energy efficiency and adaptability of the device.

[0007] The device uses the plate as a unified load-bearing foundation. The support frame, heat exchange chamber and other components of the series components are all integrated on the plate in a standardized manner, resulting in a compact overall structure that does not require complex on-site assembly. At the same time, the joints can be directly threaded to the external pipelines of the generator air cooler and plate heat exchanger without the need for additional adapters, which greatly shortens the on-site installation time. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0009] Figure 1 This is a front view of the overall structure of this utility model.

[0010] Figure 2 This is a side view of the overall structure of this utility model.

[0011] Figure 3 This is a schematic diagram of the series assembly of this utility model.

[0012] Figure 4 This is an exploded view of the series assembly of this utility model.

[0013] The attached figures are labeled as follows: 1. Plate; 2. Support frame; 3. First heat exchange chamber; 4. Second heat exchange chamber; 5. Through hole; 6. Slide plate; 7. Long slot hole; 8. Deflection wheel; 9. Motor; 10. Piston rod; 11. Stop block; 12. Push rod; 13. Connector. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] The generator air cooler and plate heat exchanger series heat exchange device disclosed in this embodiment aims to solve the problem in the prior art where the generator air cooler is unable to reduce the generator hot air to the target temperature due to the initial temperature of the cooling medium being too high.

[0016] like Figure 1As shown, the core supporting component of this series heat exchanger is the plate 1, which provides stable support for the entire device. A series assembly is fixedly installed on one side of the plate 1 by welding. The support frame 2 in the series assembly is made of aluminum alloy, while the first heat exchange chamber 3 and the second heat exchange chamber 4 are both made of stainless steel, possessing excellent corrosion resistance and thermal conductivity. The second heat exchange chamber 4 is integrally formed with the first heat exchange chamber 3, and a through hole 5 is provided at the bottom of the inner wall of the second heat exchange chamber 4, allowing for smooth communication between the first heat exchange chamber 3 and the second heat exchange chamber 4. Simultaneously, a baffle 11 is provided at the bottom of the inner wall of the second heat exchange chamber 4 above the through hole 5, which can adjust the flow rate of the heat exchange medium by changing its blocking area above the through hole 5.

[0017] like Figure 2 As shown, two sliding grooves are provided in the middle of the support frame 2 along its length. Two sliding plates 6 are respectively embedded in the sliding grooves and slidably connected to the support frame 2. The axis of each sliding plate 6 is on the same horizontal plane as the axis of the first heat exchange chamber 3 and the second heat exchange chamber 4, ensuring that the sliding plate 6 can accurately act on the subsequent related components when it moves.

[0018] like Figure 3 As shown, each skateboard 6 has a long, narrow hole 7 extending along its length. The long, narrow hole 7 matches the travel distance of the skateboard 6. A deflector wheel 8 is slidably connected inside the long, narrow hole 7. The deflector wheel 8 is a steel eccentric wheel with a polished outer wall that fits tightly against the inner wall of the long, narrow hole 7, ensuring stable sliding of the skateboard 6 when the deflector wheel 8 rotates. A motor 9 is bolted to the top of the board body 1. The motor 9 is a servo motor, and its output shaft is connected to the deflector wheel 8 via a coupling. The motor 9 can rotate clockwise or counterclockwise to drive the deflector wheel 8, thereby controlling the skateboard 6 to slide back and forth along the groove of the support frame 2.

[0019] like Figure 4 As shown, the end of the stop block 11 away from the through hole 5 is fixed with a push rod 12 by a threaded connection. The push rod 12 penetrates the side wall of the second heat exchange chamber 4, and a polytetrafluoroethylene seal is provided at the penetration point to effectively prevent leakage of the heat exchange medium in the second heat exchange chamber 4. One end of the first heat exchange chamber 3 is slidably connected to a piston rod 10 along its axial direction. Its outer peripheral wall is chrome-plated and fits tightly against the inner wall of the first heat exchange chamber 3. A nitrile rubber sealing ring is provided at the contact point between the piston rod 10 and the first heat exchange chamber 3 to ensure the sealing of the first heat exchange chamber 3 and prevent leakage of the heat exchange medium.

[0020] In addition, connectors 13 are embedded on the outer side of the first heat exchange chamber 3 away from the piston rod 10 and the outer side of the second heat exchange chamber 4 away from the push rod 12, respectively. They can be adapted to the external threads of the external pipeline. The first heat exchange chamber 3 and the second heat exchange chamber 4 can be connected to the pipelines of the generator air cooler and the plate heat exchanger through the connectors 13, so as to realize the series connection of the generator air cooler and the plate heat exchanger. The specific working principle is as follows: When in use, the first heat exchange chamber 3 is connected to the outlet pipe of the generator air cooler through the connector 13, the second heat exchange chamber 4 is connected to the inlet pipe of the plate heat exchanger, and the outlet pipe of the plate heat exchanger is connected to the inlet pipe of the generator air cooler to form a complete series heat exchange circuit.

[0021] When motor 9 is started, it drives the deflector wheel 8 to rotate. Since the deflector wheel 8 is eccentrically positioned, it exerts a thrust on the inner wall of the elongated hole 7 during rotation, thereby causing the slide plate 6 to slide back and forth along the groove of the support frame 2. When the slide plate 6 slides towards the first heat exchange chamber 3, it pushes the piston rod 10 to slide within the first heat exchange chamber 3, compressing the heat exchange medium within the first heat exchange chamber 3, allowing the heat exchange medium to enter the second heat exchange chamber 4 through the through hole 5. At the same time, when the slide plate 6 slides towards the second heat exchange chamber 4, it pushes the top rod 12 to move the stop block 11 within the second heat exchange chamber 4, adjusting the blocking area of ​​the stop block 11 on the through hole 5, thereby controlling the rate at which the heat exchange medium enters the second heat exchange chamber 4 from the first heat exchange chamber 3.

[0022] After the heat exchange medium enters the second heat exchange chamber 4, it flows into the plate heat exchanger through the connector 13. Inside the plate heat exchanger, it exchanges heat with the low-temperature fluid to reduce its own temperature. Then, it flows back to the generator air cooler through the outlet pipe of the plate heat exchanger, providing the generator air cooler with a low-temperature cooling medium and achieving efficient cooling of the circulating air inside the generator.

[0023] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A heat exchange device for a generator air cooler and a plate heat exchanger connected in series, comprising a plate body (1), characterized in that: The plate (1) is equipped with a series assembly for realizing the series heat exchange between the generator air cooler and the plate heat exchanger. The series assembly includes a support frame (2) fixedly installed on one side of the plate (1). The two ends of the support frame (2) are respectively provided with a first heat exchange chamber (3) for carrying the heat exchange medium. Each first heat exchange chamber (3) is provided with a second heat exchange chamber (4) integrally formed with it at the top. The second heat exchange chamber (4) and the first heat exchange chamber (3) together form a medium flow channel for series heat exchange. The bottom of the inner wall of the second heat exchange chamber (4) is provided with a through hole (5) for connecting the first heat exchange chamber (3) and the second heat exchange chamber (4) to ensure smooth flow of the heat exchange medium; The bottom of the inner wall of the second heat exchange chamber (4) is provided with a baffle (11) located at the top of the through hole (5) to adjust the flow rate of the heat exchange medium at the through hole (5).

2. The generator air cooler and plate heat exchanger series heat exchange device according to claim 1, characterized in that: The support frame (2) has two sliding plates (6) connected to its middle part along its length direction. The two sliding plates (6) are symmetrically distributed, and the axis of each sliding plate (6) is on the same horizontal plane as the axis of the first heat exchange chamber (3) and the axis of the second heat exchange chamber (4).

3. The generator air cooler and plate heat exchanger series heat exchange device according to claim 2, characterized in that: Both of the skateboards (6) have elongated holes (7) extending through them along their length. The length of the elongated holes (7) matches the travel distance of the skateboards (6). Each elongated hole (7) is slidably connected to a deflector wheel (8). The outer peripheral wall of the deflector wheel (8) is tightly fitted to the inner wall of the elongated hole (7) so that the deflector wheel (8) can drive the skateboard (6) to slide stably when it rotates.

4. The generator air cooler and plate heat exchanger series heat exchange device according to claim 3, characterized in that: The axial direction of the deflection wheel (8) is eccentric. The top of the plate (1) is fixedly installed with a motor (9) for driving the deflection wheel (8) to rotate by bolts. The motor (9) can drive the deflection wheel (8) to rotate clockwise or counterclockwise by forward and reverse rotation, thereby controlling the slide plate (6) to slide back and forth along the support frame (2).

5. The generator air cooler and plate heat exchanger series heat exchange device according to claim 1, characterized in that: The end of the stop block (11) away from the through hole (5) is fixedly connected to a top rod (12) that penetrates the side wall of the second heat exchange chamber (4). A sealing element is provided between the top rod (12) and the side wall of the second heat exchange chamber (4) to prevent leakage of the heat exchange medium. A piston rod (10) is slidably connected to one end of the first heat exchange chamber (3) along its axial direction. The outer peripheral wall of the piston rod (10) is tightly fitted with the inner wall of the first heat exchange chamber (3), and a sealing ring is provided between the piston rod (10) and the first heat exchange chamber (3) to ensure the sealing of the first heat exchange chamber (3).

6. The generator air cooler and plate heat exchanger series heat exchange device according to claim 5, characterized in that: The piston rod (10) extends away from the first heat exchange chamber (3) and the push rod (12) extends away from the stop block (11) to the side of the corresponding slide plate (6). Wear-resistant pads are provided at the contact ends of the piston rod (10), the push rod (12) and the slide plate (6). When the slide plate (6) slides along the support frame (2), it can push the piston rod (10) to slide in the first heat exchange chamber (3) and push the push rod (12) to drive the stop block (11) to move in the second heat exchange chamber (4).

7. The generator air cooler and plate heat exchanger series heat exchange device according to claim 1, characterized in that: The outer side of the first heat exchange chamber (3) away from the piston rod (10) and the outer side of the second heat exchange chamber (4) away from the top rod (12) are respectively embedded with a connector (13) for connecting external pipelines, so as to adapt and connect with the external thread of the external pipeline, and realize the pipeline series connection between the generator air cooler and the plate heat exchanger.

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