Ventilation and heat dissipation type bearing assembly, heat dissipation adjusting device and heat dissipation adjusting method

Abstract

The invention belongs to a bearing component of a wind driven generator, and discloses a ventilation and heat dissipation type bearing assembly for the wind driven generator, a heat dissipation adjusting device and a heat dissipation adjusting method.The ventilation and heat dissipation type bearing assembly comprises a motor end cover, a bearing and a bearing outer end cover and further comprises a heat dissipation assembly, comprising a plurality of heat dissipation ribs arranged on the end face of a bearing outer end cover, and the heat dissipation ribs are arranged in the air flow direction from an air inlet to an air outlet of a slip ring chamber. And the first heat conduction assembly comprises a heat conduction ring and a first heat dissipation strip, the heat conduction ring is arranged on the circumferential surface of the bearing outer end cover, the first heat dissipation strip is arranged at the air inlet of the slip ring chamber, and the first heat dissipation strip and the heat conduction ring are mutually connected for heat conduction. According to the invention, the problem of poor heat dissipation of the bearing end cover in a narrow space is solved, so that the problem of shutdown caused by high temperature of the bearing is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of heat dissipation of bearings of wind turbines, and in particular to a ventilation and heat dissipation type bearing assembly, a heat dissipation regulating device and a heat dissipation regulating method. Background Art

[0002] The bearing assembly of the wind turbine is a component that supports the motor shaft. The bearing assembly is distributed at the drive shaft end and non-drive shaft end of the generator. At the non-drive shaft end of the generator, the bearing assembly is arranged in the slip ring room, which has a small space and poor ventilation. It is often prone to high temperature and cause premature shutdown.

[0003] Prior art Chinese utility model CN201956813U discloses a generator split-flow slip ring chamber ventilation structure. By setting an inclined air guide plate at the air inlet of the slip ring chamber, the cooling air in the slip ring chamber can be diverted to introduce more cooling air to the side of the bearing assembly, thereby improving the cooling effect of the bearing. However, in actual application, since the space on the side of the bearing assembly is too narrow, no matter how the air is introduced, the space is small, which limits the ventilation volume, so the cooling effect is not good. Summary of the invention

[0004] In view of the problem that the bearing assembly at the non-driving shaft end in the prior art has poor cooling effect, the present invention provides a ventilation and heat dissipation type bearing assembly, a heat dissipation adjustment device and a heat dissipation adjustment method, which increases a heat-conducting component to overcome the problem of small space and improve the cooling effect of the bearing.

[0005] The present invention is achieved through the following technical solutions:

[0006] A ventilation and heat dissipation bearing assembly for a wind turbine generator, comprising a motor end cover, a bearing and a bearing outer end cover, and also comprising:

[0007] A heat dissipation assembly, comprising a plurality of heat dissipation ribs arranged on the end surface of the outer end cover of the bearing, wherein the heat dissipation ribs are arranged along the wind flow direction from the air inlet to the air outlet of the slip ring chamber;

[0008] The first heat conduction component includes a heat conduction ring and a first heat dissipation strip. The heat conduction ring is arranged on the circumferential surface of the outer end cover of the bearing. The first heat dissipation strip is arranged at the air inlet of the slip ring chamber. The first heat dissipation strip and the heat conduction ring are interconnected for heat conduction.

[0009] Optionally, it also includes:

[0010] The second heat conduction component includes a heat conduction bar and a second heat dissipation bar. The heat conduction bar is arranged on the outer end surface of the motor end cover, and the second heat dissipation bar is arranged at the air inlet of the slip ring chamber. The second heat dissipation bar and the heat conduction bar are interconnected for heat conduction.

[0011] Optionally, the heat-conducting strip and the motor end cover are integrally formed or connected by bonding with a heat-conducting adhesive; the heat-conducting ring and the bearing outer end cover are integrally formed or connected by bonding with a heat-conducting adhesive.

[0012] Optionally, the height of the heat conductive strip along the wind flow direction from the air inlet to the air outlet of the slip ring chamber gradually decreases.

[0013] A heat dissipation regulating device for a ventilation and heat dissipation bearing assembly for a wind turbine generator based on the above-mentioned, wherein the air inlet of the slip ring chamber comprises a first air inlet and a second air inlet, the first air inlet is used to introduce cooling air into the slip ring assembly, and the second air inlet is used to introduce cooling air into the bearing assembly, the heat dissipation regulating device comprises a plurality of equally spaced air guide plates arranged at the first air inlet, the air guide plates are provided with a rotating shaft, the rotating shaft is connected with a driving mechanism for driving the air guide plates to deflect, the rotating shaft divides the air guide plates into a long plate portion with a longer length and a short plate portion with a shorter length, the long plate portion is located above the rotating shaft, and the short plate portion is located below the rotating shaft, the first heat dissipation strip and the second heat dissipation strip are arranged below the area between two adjacent air guide plates;

[0014] The heat dissipation regulating device also includes a first temperature sensor for detecting the temperature of the bearing assembly, a second temperature sensor for detecting the temperature of the slip ring assembly, and a processor, wherein the processor is respectively connected to the first temperature sensor, the second temperature sensor, and the driving mechanism.

[0015] Optionally, each first heat dissipation bar or each second heat dissipation bar corresponds to two independent air guide plates.

[0016] Optionally, from one side of the first air inlet to the other side, a first heat dissipation bar or a second heat dissipation bar is arranged in a gap between each air guide plate.

[0017] Optionally, the driving mechanism includes a transmission gear and a driving motor, and the transmission gear is sleeved on one end of each rotating shaft, and meshing is formed between two adjacent air guide plates, and one of the transmission gears is driven by the driving motor.

[0018] A heat dissipation adjustment method based on the above heat dissipation adjustment device comprises the following steps:

[0019] The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is lower than the bearing temperature threshold and the data from the second temperature sensor is lower than the slip ring temperature threshold, the drive mechanism is kept stationary and the air guide plate is in a vertical state.

[0020] The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is higher than the bearing temperature threshold and the data from the second temperature sensor is lower than the slip ring temperature threshold, the processor controls the driving mechanism to move forward, drives the air guide plate to deflect forward, so that the short plate parts of the air guide plate are close to each other, leaving a ventilation gap, and dissipating heat to the first heat dissipation strip or the second heat dissipation strip;

[0021] The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is lower than the bearing temperature threshold and the data from the second temperature sensor is higher than the slip ring temperature threshold, the processor controls the driving mechanism to move in the reverse direction, driving the air guide plate to deflect in the reverse direction, so that the long plate parts of the air guide plate move closer to each other until they are closed.

[0022] The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is higher than a bearing temperature threshold and the data from the second temperature sensor is higher than a slip ring temperature threshold, the generator system shuts down.

[0023] The technical solution of the present invention has at least the following beneficial effects:

[0024] The ventilation and heat dissipation bearing assembly of the present invention can first guide the heat on the outer end cover of the bearing to the air inlet of the slip ring chamber through the heat conductive ring and the first heat dissipation strip, cool it and dissipate the heat, thereby solving the problem of insufficient ventilation due to small space. The heat conductive structural design is adopted, so that heat can be extracted and heat dissipated regardless of the size of the space. At the same time, the outer end cover of the bearing is also provided with heat dissipation ribs arranged along the flow direction of the cooling air, so as to further improve the heat dissipation effect of the outer end cover of the bearing.

[0025] The heat dissipation regulating device and the heat dissipation regulating method of the present invention can adjust the distribution of heat dissipation capacity according to the difference between the bearing temperature and the slip ring temperature, and can make the best use of the existing cooling air to improve the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of a wind turbine generator in the prior art;

[0027] Figure 2 A partial cross-sectional view of the installation state of the ventilation and heat dissipation bearing assembly of the present invention

[0028] Figure 3 It is a side cross-sectional schematic diagram of the heat dissipation adjustment device of the present invention in a first state;

[0029] Figure 4 It is a side cross-sectional schematic diagram of the heat dissipation adjustment device of the present invention in the second state;

[0030] Figure 5 It is a side cross-sectional schematic diagram of the heat dissipation adjustment device of the present invention in the third state;

[0031] Figure 6 A schematic diagram of the electrical control principle of the heat dissipation regulating device of the present invention;

[0032] Icons: 11-air cooler, 12-generator body, 13-drive end bearing assembly, 14-non-drive end bearing assembly, 141-bearing, 142-bearing outer end cover, 143-motor end cover, 15-slip ring assembly, 16-slip ring chamber, 21-heat dissipation ribs, 221-heat conductive ring, 222-first heat dissipation strip, 23-driving mechanism, 24-air guide plate, 241-long plate part, 242-short plate part, 251-heat conductive strip, 252-second heat dissipation strip, 261-first temperature sensor, 262-second temperature sensor, 27-processor. DETAILED DESCRIPTION

[0033] like Figure 1 As shown, the wind turbine generator of the prior art mainly includes a generator body 12 (rotor part, stator part and shaft part), a bearing assembly, an air cooler 11, a slip ring assembly 15 and a slip ring chamber 16, etc., wherein the bearing assembly includes a drive end bearing assembly 13 and a non-drive end bearing assembly 14. The present invention mainly solves the problem of abnormal high temperature of the non-drive end bearing assembly 14. The non-drive end bearing assembly 14 includes a motor end cover 143, a bearing 141 and a bearing outer end cover 142. The bearing 141 is installed on the motor end cover 143. The two sides of the bearing 141 are respectively the bearing inner end cover and the bearing outer end cover 142. When the present invention is used to troubleshoot the cause of high temperature in the existing generator set, the first step is to observe the bearing lubricating grease. Since the bearing lubricating grease does not have the phenomenon of hardening, the high temperature problem of the bearing 141 caused by the lubricating oil is eliminated. Then, when further troubleshooting the bearing structure problem, it is found that the bearing outer end cover 142 is located in the slip ring chamber 16, the space design is compact, the air volume is small, and it is not conducive to heat dissipation. Therefore, the present invention focuses on solving the heat dissipation problem of the existing bearing assembly in a narrow space.

[0034] Reference Figure 2-4 The ventilation and heat dissipation bearing assembly of the present invention also includes a heat dissipation assembly and a first heat conduction assembly. The heat dissipation assembly includes a plurality of heat dissipation ribs 21 arranged on the end surface of the bearing outer end cover 142. The heat dissipation ribs 21 are arranged along the wind flow direction from the air inlet to the air outlet of the slip ring chamber 16. The heat dissipation ribs 21 of the present invention are preferably integrally formed with the bearing outer end cover 142. During maintenance, it is only necessary to replace the bearing outer end cover 142 with the heat dissipation ribs 21, which is simple and convenient to operate.

[0035] The first heat-conducting component includes a heat-conducting ring 221 and a first heat dissipating bar 222. The heat-conducting ring 221 is arranged on the circumferential surface of the bearing outer end cover 142, and the first heat dissipating bar 222 is arranged at the air inlet of the slip ring chamber 16. The first heat dissipating bar 222 and the heat-conducting ring 221 are interconnected for heat conduction. The first heat-conducting ring 221 adopts an annular structure and is wrapped around the circumferential surface of the outer end cover 142 of the bearing. In order to ensure a good heat-conducting effect, the heat-conducting ring 221 and the first heat dissipating strip 222 are arranged in an integrally formed manner in this embodiment. The heat of the outer end cover 142 of the bearing is introduced into the first heat dissipating strip 222 through the heat-conducting ring 221, and then the air is introduced into the air inlet of the slip ring chamber 16 to cool it. The advantage of the heat-conducting structural design is that the space limitation problem of the outer end cover 142 of the bearing is avoided, and the heat is introduced into the air inlet of the slip ring chamber 16 with a more spacious space, so as to ensure that the outer end cover 142 of the bearing has a good heat dissipation effect. Of course, the cooling of the slip ring assembly 15 of the slip ring chamber 16 will be affected to a certain extent, but it is sufficient as long as the slip ring assembly 15 can be guaranteed to operate at the rated temperature. In order to ensure good contact between the heat-conducting ring 221 and the outer end cover 142 of the bearing, the heat-conducting ring 221 of this embodiment and the outer end cover 142 of the bearing can be formed in one piece, but if the installation convenience is considered, a split structure can be adopted, and the thermal conductivity can be improved by coating silicone at the contact part. The heat-conducting ring 221 adopts an annular structure and is arranged on the circumferential surface of the outer end cover 142 of the bearing, which can avoid the problem of narrow space on the outer end surface of the outer end cover 142 of the bearing and does not affect the circulation of cooling air; the heat-conducting ring 221 can be made of heat-conducting materials with good heat dissipation such as aluminum.

[0036] In order to further improve the heat conduction effect, the ventilation and heat dissipation bearing assembly of this embodiment also includes a second heat conduction assembly, which includes a heat conduction bar 251 and a second heat dissipation bar 252. The heat conduction bar 251 is arranged on the outer end surface of the motor end cover 143, and the second heat dissipation bar 252 is arranged at the air inlet of the slip ring chamber 16. The second heat dissipation bar 252 and the heat conduction bar 251 are connected to each other for heat conduction. The heat conduction bar 251 is arranged on the outer end surface of the motor end cover 143, and is used to guide the heat generated on the motor end cover 143, and finally guides it to the air inlet of the slip ring chamber 16 through the second heat dissipation bar 252 connected thereto for heat dissipation. The heat-conducting strip 251 and the motor end cover 143 can also be integrally formed or connected by heat-conducting adhesive. In this embodiment, the heat-conducting strip 251 and the heat-conducting ring 221 are used to increase the contact area. The heat-conducting ring 221 completely surrounds the circumferential surface of the entire bearing outer end cover 142; and the heat-conducting strip 251 extends from the motor end cover 143 close to the air inlet of the slip ring chamber 16 along the circumferential direction to the side close to the air outlet. The long path is set to effectively increase the contact area. However, in order not to affect the flow of wind, the height of the heat-conducting strip 251 is limited, and the height of the heat-conducting strip 251 along the wind flow direction from the air inlet to the air outlet of the slip ring chamber 16 is gradually reduced.

[0037] The present invention is firstly based on the transformation of the existing wind turbine equipment, so many structures are added. Therefore, under the condition of a certain air inlet volume of the slip ring chamber 16, the best heat dissipation effect can only be achieved by reasonably allocating the heat dissipation capacity. In order to achieve the above-mentioned purpose, the present invention also provides a heat dissipation adjustment device for a ventilation and heat dissipation bearing assembly of a wind turbine. The air inlet of the slip ring chamber 16 includes a first air inlet and a second air inlet. The first air inlet is used to introduce cooling air into the slip ring assembly 15, and the second air inlet is used to introduce cooling air into the bearing assembly. The heat dissipation adjustment device includes a plurality of equally spaced air guide plates 24 arranged at the first air inlet. The air guide plates 24 are provided with a rotating shaft. The rotating shaft is connected to a driving mechanism 23 for driving the air guide plates 24 to deflect. The rotating shaft divides the air guide plates 24 into a long plate portion 241 with a longer length and a short plate portion 242 with a shorter length. The long plate portion 241 is located above the rotating shaft, and the short plate portion 242 is located below the rotating shaft. The first heat dissipation strip 222 and the second heat dissipation strip 252 are arranged below the area between two adjacent air guide plates 24.

[0038] For the convenience of description, the first heat dissipation bar 222 and the second heat dissipation bar 252 are both a type of heat dissipation bar, and the heat dissipation bar is arranged below the area between the air guide plates 24 and the air guide plates 24. The present invention preferably follows the method of arranging a heat dissipation bar below every two air guide plates 24 from one side, and at the same time, the heat dissipation bar and the heat dissipation bar are separated by a group of gaps between the air guide plates 24. Alternatively, it can be described as arranging a first heat dissipation bar 222 or a second heat dissipation bar 252 for every gap between air guide plates 24 from one side of the first air inlet to the other side, and each first heat dissipation bar 222 or second heat dissipation bar 252 corresponds to two independent air guide plates 24, such as Figure 3 As shown. The advantage of this design is that, under normal circumstances, the wind guide plate 24 is in a vertical state, and the incoming wind blows onto the heat dissipation strip, which can dissipate heat from the heat dissipation strip, thereby dissipating heat from the bearing assembly. If the heat dissipation effect of the bearing assembly is still not good in the above situation, the wind guide plate 24 can be adjusted so that the short plate portion 242 of the wind guide plate 24 with the heat dissipation strip disposed below is close to each other, and the long plate portion 241 is separated from each other, forming a Figure 4 In the state shown, first, the cooling air will be concentrated between the two air guide plates 24 with heat dissipation strips, and the concentrated blowing will be formed. After the V-shaped air guide plate 24 structure is formed, the wind will be released from high pressure to low pressure at the air outlet position, and the heat dissipation effect will be better. Through such a structural design, concentrated blowing on the heat dissipation strips is formed, effectively improving its heat dissipation effect. Figure 5When the heat dissipation effect of the bearing assembly is good, but the heat dissipation of the slip ring assembly 15 is poor, the air guide plate 24 can be controlled to rotate in the opposite direction, so that the long plate ends of the two air guide plates 24 with heat dissipation strips are close to each other, so that the wind can be concentrated between the other two air guide plates 24 without heat dissipation strips. Most of the wind does not pass through the heat dissipation strips but blows directly to the slip ring assembly 15, thereby ensuring the cooling of the slip ring assembly 15.

[0039] Reference Figure 6 In order to realize the above process, the heat dissipation adjustment device also includes a first temperature sensor 261 for detecting the temperature of the bearing assembly, a second temperature sensor 262 for detecting the temperature of the slip ring assembly 15, and a processor 27, and the processor 27 is respectively connected to the first temperature sensor 261, the second temperature sensor 262 and the driving mechanism 23.

[0040] The driving mechanism 23 includes a transmission gear and a driving motor. A transmission gear is mounted on one end of each rotating shaft. Two adjacent air guide plates 24 are meshed with each other. One of the transmission gears is driven by the driving motor. The driving mechanism 23 utilizes the principle that gear transmission can be reversed to achieve the opposite rotation design of the two adjacent air guide plates 24. This embodiment will not be described in detail.

[0041] Based on the above structural design, the heat dissipation adjustment method of the heat dissipation adjustment device of the present invention comprises the following steps:

[0042] The processor 27 obtains data from the first temperature sensor 261 and the second temperature sensor 262. When the data from the first temperature sensor 261 is lower than the bearing temperature threshold, and the data from the second temperature sensor 262 is lower than the slip ring temperature threshold, the drive mechanism 23 is kept stationary, and the air guide plate 24 is in a vertical state.

[0043] The processor 27 obtains data from the first temperature sensor 261 and the second temperature sensor 262. When the data from the first temperature sensor 261 is higher than the bearing temperature threshold and the data from the second temperature sensor 262 is lower than the slip ring temperature threshold, the drive mechanism 23 is controlled to move forward, driving the air guide plate 24 to deflect forward, so that the short plate portions 242 of the air guide plate 24 are brought closer to each other, leaving a ventilation gap, and dissipating heat to the first heat dissipation bar 222 or the second heat dissipation bar 252;

[0044] The processor 27 obtains data from the first temperature sensor 261 and the second temperature sensor 262. When the data from the first temperature sensor 261 is lower than the bearing temperature threshold and the data from the second temperature sensor 262 is higher than the slip ring temperature threshold, the processor 27 controls the driving mechanism 23 to move in the reverse direction, driving the air guide plate 24 to deflect in the reverse direction, so that the long plate portions 241 of the air guide plate 24 move closer to each other until they are closed.

[0045] The processor 27 obtains data from the first temperature sensor 261 and the second temperature sensor 262. When the data from the first temperature sensor 261 is higher than the bearing temperature threshold and the data from the second temperature sensor 262 is higher than the slip ring temperature threshold, the generator system shuts down.

Claims

1. A ventilation and heat dissipation bearing assembly for a wind turbine, comprising a motor end cover, a bearing and a bearing outer end cover, characterized in that: Also includes: A heat dissipation assembly, comprising a plurality of heat dissipation ribs arranged on the end surface of the outer end cover of the bearing, wherein the heat dissipation ribs are arranged along the wind flow direction from the air inlet to the air outlet of the slip ring chamber; The first heat conduction component includes a heat conduction ring and a first heat dissipation strip. The heat conduction ring is arranged on the circumferential surface of the outer end cover of the bearing. The first heat dissipation strip is arranged at the air inlet of the slip ring chamber. The first heat dissipation strip and the heat conduction ring are interconnected for heat conduction.

2. The ventilation and heat dissipation bearing assembly for a wind turbine according to claim 1, characterized in that: Also includes: The second heat conduction component includes a heat conduction bar and a second heat dissipation bar. The heat conduction bar is arranged on the outer end surface of the motor end cover, and the second heat dissipation bar is arranged at the air inlet of the slip ring chamber. The second heat dissipation bar and the heat conduction bar are interconnected for heat conduction.

3. The ventilation and heat dissipation bearing assembly for a wind turbine according to claim 2, characterized in that: The heat-conducting strip and the motor end cover are integrally formed or connected by bonding with a heat-conducting adhesive; the heat-conducting ring and the outer end cover of the bearing are integrally formed or connected by bonding with a heat-conducting adhesive.

4. The ventilation and heat dissipation bearing assembly for a wind turbine according to claim 2, characterized in that: The height of the heat conducting strip along the wind flow direction from the air inlet to the air outlet of the slip ring chamber gradually decreases.

5. A heat dissipation regulating device for a ventilation and heat dissipation bearing assembly for a wind turbine according to any one of claims 2 to 4, wherein the air inlet of the slip ring chamber comprises a first air inlet and a second air inlet, wherein the first air inlet is used to introduce cooling air into the slip ring assembly, and the second air inlet is used to introduce cooling air into the bearing assembly, wherein: The heat dissipation regulating device comprises a plurality of equally spaced air guide plates arranged at the first air inlet, the air guide plates are provided with a rotating shaft, the rotating shaft is connected to a driving mechanism for driving the air guide plates to deflect, the rotating shaft divides the air guide plates into a long plate portion with a longer length and a short plate portion with a shorter length, the long plate portion is located above the rotating shaft, and the short plate portion is located below the rotating shaft, and the first heat dissipation strip and the second heat dissipation strip are arranged below the area between two adjacent air guide plates; The heat dissipation regulating device also includes a first temperature sensor for detecting the temperature of the bearing assembly, a second temperature sensor for detecting the temperature of the slip ring assembly, and a processor, wherein the processor is respectively connected to the first temperature sensor, the second temperature sensor, and the driving mechanism.

6. The heat dissipation adjustment device according to claim 5, characterized in that: Each first heat dissipation bar or second heat dissipation bar corresponds to two independent air guide plates.

7. The heat dissipation adjustment device according to claim 5, characterized in that: From one side of the first air inlet to the other side, a first heat dissipation bar or a second heat dissipation bar is arranged in a gap between each air guide plate.

8. The heat dissipation adjustment device according to claim 5, characterized in that: The driving mechanism includes a transmission gear and a driving motor. The transmission gear is sleeved on one end of each rotating shaft, and meshing is formed between two adjacent air guide plates. One of the transmission gears is driven by the driving motor.

9. A heat dissipation adjustment method based on the heat dissipation adjustment device according to claim 5, characterized in that: The following steps are involved: The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is lower than the bearing temperature threshold and the data from the second temperature sensor is lower than the slip ring temperature threshold, the drive mechanism is kept stationary and the air guide plate is in a vertical state. The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is higher than the bearing temperature threshold and the data from the second temperature sensor is lower than the slip ring temperature threshold, the processor controls the driving mechanism to move forward, drives the air guide plate to deflect forward, so that the short plate parts of the air guide plate are close to each other, leaving a ventilation gap, and dissipating heat to the first heat dissipation strip or the second heat dissipation strip; The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is lower than the bearing temperature threshold and the data from the second temperature sensor is higher than the slip ring temperature threshold, the processor controls the driving mechanism to move in the reverse direction, driving the air guide plate to deflect in the reverse direction, so that the long plate parts of the air guide plate move closer to each other until they are closed. The processor obtains data from the first temperature sensor and the second temperature sensor. When the data from the first temperature sensor is higher than a bearing temperature threshold and the data from the second temperature sensor is higher than a slip ring temperature threshold, the generator system shuts down.

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