Vertical gearbox for electric power air cooling island

Abstract

The invention provides a vertical gearbox for an electric power air cooling island. According to the on-site working condition of the air cooling island, the transmission system is vertically installed, the motor is vertically arranged on the upper portion, and the gearbox is arranged on the lower portion. The motor is connected with the gearbox through a plum coupling. And the gear box is mounted on a foundation through a foot margin. The gearbox belongs to high-altitude working equipment, and a working machine is a large fan. Requirements for reliability and safety in use are high, and requirements for environmental protection are high. The shaft end pump is located in the box body, the overall appearance size of the gearbox is reduced, and the field installation space is saved. And the oil leakage condition possibly caused by the damage of the shaft end pump is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of gear boxes, and in particular to a vertical gear box for an electric power air-cooling island. Background Art

[0002] The air-cooling island is the core component of a thermal power plant's water-saving cooling system. It cools high-temperature steam using air instead of water, making it particularly suitable for use in water-scarce regions. Its core cooling component is a large axial-flow fan, driven by a speed reducer gearbox to regulate air volume. However, the air-cooling island gearbox faces the following significant challenges:

[0003] A. The gearbox is installed on a platform 40 to 60 meters above the ground, subjecting it to strong winds, extreme temperature swings, and dust. To accommodate the fan load, the parallel shaft reducer's output shaft must be extended to 2-3 meters. This causes the dynamic seal structure to wear under high-speed rotation, leading to high oil leakage. Leaked lubricating oil is splashed by the spinning fan blades, causing oil accumulation on transformers, cable trays, and other equipment below the equipment, potentially posing a fire hazard.

[0004] B. Traditional gearboxes use oil immersion lubrication, and the output bearings are exposed to contaminated oil for a long time, resulting in abnormal wear and shortened service life;

[0005] C. Reliance on manual inspections and a lack of real-time monitoring of oil temperature and pressure led to frequent serious faults such as gear seizure and tooth breakage, with an average repair time exceeding 72 hours.

[0006] Therefore, it is of great significance to develop a vertical gearbox for power air-cooling island. Summary of the Invention

[0007] The purpose of the present invention is to provide a vertical gearbox for an electric power air-cooling island to solve the problems existing in the prior art.

[0008] The technical solution adopted to achieve the purpose of the present invention is as follows: a vertical gearbox for an electric air-cooled island, including a box body and a forced lubrication integrated lubrication seat, as well as a transmission unit, a shaft end pump and a dry well sealing structure arranged in the box body.

[0009] The box body as a whole is a rectangular box body with a hollow interior. The box body includes a box top, a box bottom and four side walls. Partitions and side panels are arranged in the inner cavity of the box body. The partitions divide the inner cavity of the box body into an upper chamber and a lower chamber. The side panels are arranged in the lower chamber. The side panels divide the lower chamber into a lower chamber and an output shaft extension chamber. Bearing mounting holes are provided through the box top and the plate surface of the partition of the box body. The upper end opening of the box body is sealed with an end cover. The lower surface of the end cover is provided with an oil passage, as well as corresponding holes for the first axis bearing, the second axis bearing and the third axis bearing corresponding to the bearing mounting holes on the box top. The corresponding holes for the first axis bearing are provided through, and the corresponding holes for the second axis bearing and the third axis bearing are blind holes.

[0010] The transmission unit is used to achieve a deceleration effect. The transmission unit includes a vertically arranged input shaft, a gear shaft and an extended output shaft. The input shaft, gear shaft and extended output shaft are sequentially connected through a two-stage helical gear pair. The partition is mounted on the extended output shaft through the bearing mounting hole. The input shaft, gear shaft and extended output shaft are mounted in the bearing mounting holes on the partition and the box top through bearings. The upper end of the input shaft passes through the box top and extends out of the corresponding hole of the first axis bearing. The upper end of the gear shaft passes through the box top and is accommodated in the corresponding hole of the second axis bearing. The upper end of the extended output shaft passes through the box top and is accommodated in the corresponding hole of the third axis bearing, and the lower end passes through the output shaft extension chamber and extends out of the box bottom.

[0011] The shaft end pump is arranged in the lower chamber. The dry well seal structure is arranged in the output shaft extension chamber. The dry well seal structure is sleeved on the extended output shaft to prevent lubricating oil from seeping into the output shaft extension chamber.

[0012] The integrated forced lubrication seat is located outside the housing. Its oil outlet is connected to the oil passage, while its oil inlet communicates with the shaft-end pump. The inlet and outlet of the integrated forced lubrication seat are sealed against the machined surface of the housing via sealing gaskets. During operation, the shaft-end pump draws lubricating oil into the integrated forced lubrication seat, filtering it. The oil then enters the oil passage, lubricating bearings at various locations and the two-stage helical gear pair.

[0013] Furthermore, it also includes an intelligent monitoring system. The intelligent monitoring system includes a temperature sensor, a pressure sensor, a temperature control switch, a heater and an integrated junction box. The temperature sensor is used to measure the temperature of the gearbox. The pressure sensor is used to detect the usage status of the forced lubrication integrated lubrication seat. The heater is used to heat the lubricating oil in the gearbox. The temperature control switch is connected to the heater. The temperature sensor, pressure sensor and temperature control switch are all connected to the integrated junction box. The temperature control switch has its own temperature sensor, and the upper and lower limits of the measured temperature are set to ensure that the switch is opened and closed at different temperatures. The heater is controlled by the temperature control switch to ensure the oil temperature when the machine starts.

[0014] Furthermore, lithium-based grease lubrication is selected as the lubrication method for the output end.

[0015] Furthermore, the bottom of the box is provided with feet. The box is mounted on an overhead platform via the feet. The lower end of the extended output shaft extends below the overhead platform. The extended output shaft is driven by a large fan. The extended output shaft drives the large fan to rotate and cool the high-temperature steam. The input shaft is connected to the motor via a plum blossom coupling.

[0016] Furthermore, an oil drain valve is provided on the side wall of the box body, and the oil drain valve connects the lower chamber with the outside.

[0017] Furthermore, an oil distribution pipe is arranged in the box body, which connects the oil channel and the oil outlet of the forced lubrication integrated lubrication seat to perform forced lubrication on multiple specific lubrication points.

[0018] Furthermore, the end cover is fixedly connected to the box body by bolts.

[0019] Furthermore, an observation port is provided on the peripheral wall of the box body and is blocked by an observation cover.

[0020] The technical effects of the present invention are unquestionable:

[0021] A. Prevents oil leakage caused by thin oil lubrication at the output end, and prevents environmental pollution and maintenance costs caused by oil leakage. At the same time, it reduces the amount of lubricating oil used, which is more economical.

[0022] B. The shaft-end pump is located inside the gearbox, preventing damage from bumps and providing increased safety. This reduces the overall size of the gearbox and saves installation space on site. This prevents oil leaks that could occur if the shaft-end pump is damaged. All oil pipes are located inside the gearbox, preventing damage and oil leaks that might occur if they were located outside.

[0023] C. A temperature sensor measures the gearbox temperature, and a pressure sensor monitors the status of the forced lubrication system. A temperature control switch controls the heater to ensure the correct oil temperature when the machine starts. All sensors are connected to an intelligent monitoring junction box, allowing staff to better monitor the status of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a bottom view of the vertical gearbox for the power air-cooling island;

[0025] Figure 2 This is a working diagram of a vertical gearbox for an electric power air-cooling island;

[0026] Figure 3 for Figure 2 sectional view of

[0027] Figure 4 This is the relationship diagram of the shaft end pump position;

[0028] Figure 5 This is a cross-sectional view of a vertical gearbox for an electric power air-cooling island;

[0029] Figure 6 Schematic diagram of the box structure;

[0030] Figure 7 It is a cross-sectional view of the box;

[0031] Figure 8 is a schematic diagram of the end cover;

[0032] Figure 9 This is a schematic diagram of the intelligent monitoring system;

[0033] Figure 10 Schematic diagram of oil distribution pipe;

[0034] Figure 11 Lubrication diagram.

[0035] In the figure: box body 1, upper chamber 101, lower chamber 102, output shaft extension chamber 103, foot 104, oil drain valve 105, partition 106, side plate 107, end cover 2, oil channel 201, corresponding hole 202 of the first shaft bearing, corresponding hole 203 of the second shaft bearing, corresponding hole 204 of the third shaft bearing, oil distribution pipe 3, shaft end pump 4, input shaft 5, gear shaft 6, extended output shaft 7, intelligent monitoring system 8, temperature sensor 801, pressure sensor 802, temperature control switch 803, heater 804, integrated junction box 805, forced lubrication integrated lubrication seat 9, motor 10, plum blossom coupling 11. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the following examples, but it should not be understood that the scope of the present invention is limited to the following examples. Without departing from the above technical ideas of the present invention, various substitutions and modifications can be made according to common technical knowledge and customary means in the art, and all should be included in the scope of protection of the present invention.

[0037] Example 1:

[0038] See also Figures 1 to 8 This embodiment provides a vertical gearbox for an electric power air-cooling island, including a box body 1 and a forced lubrication integrated lubrication seat 9, as well as a transmission unit, a shaft end pump 4 and a dry well sealing structure arranged in the box body 1.

[0039] The box body 1 as a whole is a rectangular box body with a hollow interior. The box body 1 includes a box top, a box bottom and four side walls. A partition 106 and a side plate 107 are arranged in the inner cavity of the box body 1. The partition 106 divides the inner cavity of the box body into an upper chamber 101 and a lower chamber. The side plate 107 is arranged in the lower chamber. The side plate 107 divides the lower chamber into a lower chamber 102 and an output shaft extension chamber 103. Bearing mounting holes are provided through the box top and the plate surface of the partition 106 of the box body 1. The upper end opening of the box body 1 is sealed with an end cover 2. The lower surface of the end cover 2 is provided with an oil passage 201, as well as corresponding holes 202 for the first-axis bearing, 203 for the second-axis bearing and 204 for the third-axis bearing corresponding to the bearing mounting holes on the box top. The corresponding hole 202 for the first-axis bearing is provided through, and the corresponding holes 203 for the second-axis bearing and 204 for the third-axis bearing are blind holes. It is worth noting that, see Figure 5 The first shaft has a through hole 202, which houses a sleeve embedded within it. This sleeve houses an oil seal at its top. The lower portion extends into the top bearing hole of the housing, positioning and compressing the input shaft bearing. This sleeve has an oil groove corresponding to the input shaft end of the end cover oil passage 201, allowing lubricating oil to flow smoothly into the bearing in the top bearing hole. The second shaft has a blind hole 203, which compresses and lubricates the second shaft bearing. The third shaft has a blind hole 204, which compresses and lubricates the third shaft bearing.

[0040] The transmission unit is used to achieve a deceleration effect. The transmission unit includes a vertically arranged input shaft 5, a gear shaft 6, and an extended output shaft 7. The input shaft 5, gear shaft 6, and extended output shaft 7 are sequentially connected through a two-stage helical gear pair. The partition 106 is mounted on the extended output shaft 7 through the bearing mounting hole. The input shaft 5, gear shaft 6, and extended output shaft 7 are mounted in the bearing mounting holes on the partition 106 and the top of the box through bearings. The upper end of the input shaft 5 passes through the top of the box and extends out of the corresponding hole 202 for the first axis bearing. The upper end of the gear shaft 6 passes through the top of the box and is accommodated in the corresponding hole 203 for the second axis bearing. The upper end of the extended output shaft 7 passes through the top of the box and is accommodated in the corresponding hole 204 for the third axis bearing, and the lower end passes through the output shaft extension chamber 103 and extends out of the bottom of the box.

[0041] The shaft end pump 4 is arranged in the lower chamber 102. The dry well seal structure is arranged in the output shaft extension chamber 103. The dry well seal structure is sleeved on the extended output shaft 7 to prevent lubricating oil from seeping into the output shaft extension chamber 103.

[0042] The forced lubrication integrated lubrication seat 9 is arranged outside the housing 1. The oil outlet of the forced lubrication integrated lubrication seat 9 is connected to the oil passage 201, and the oil inlet is connected to the shaft end pump 4. The oil inlet and outlet of the forced lubrication integrated lubrication seat 9 are sealed against the machined surface of the housing 1 through sealing gaskets.

[0043] See also Figure 11 The gearbox is mounted vertically, the oil level is low, and the lubricating oil submerges shaft end pump 4. During operation, driven by input shaft 5, shaft end pump 4 pumps lubricating oil into the forced lubrication integrated lubrication seat 9, where it is filtered. The oil then enters oil channel 201, lubricating bearings at various locations and the two-stage helical gear pair.

[0044] Example 2:

[0045] The main contents of this embodiment are the same as those of embodiment 1, wherein, see Figure 9 , also includes an intelligent monitoring system 8. The intelligent monitoring system 8 includes a temperature sensor 801, a pressure sensor 802, a temperature control switch 803, a heater 804 and an integrated junction box 805. The temperature sensor 801 is used to measure the temperature of the gear box. The pressure sensor 802 is used to detect the usage status of the forced lubrication integrated lubrication seat 9. The heater 804 is used to heat the lubricating oil in the gear box. The temperature control switch 803 is connected to the heater 804. The temperature sensor 801, the pressure sensor 802 and the temperature control switch 803 are all connected to the integrated junction box 805. The temperature control switch 803 has its own temperature sensor, and the upper and lower limits of the measuring temperature are set to ensure that the switch is opened and closed at different temperatures. The heater is controlled by the temperature control switch 803 to ensure the oil temperature when the machine starts.

[0046] Example 3:

[0047] The main contents of this embodiment are the same as those of embodiment 1 or 2, wherein lithium-based grease lubrication is selected as the lubrication method for the output end.

[0048] Example 4:

[0049] The main features of this embodiment are the same as any of Embodiments 1-3, except that the bottom of the housing 1 is provided with feet 104. The housing 1 is mounted on an overhead platform via the feet 104. The lower end of the extended output shaft 7 extends below the overhead platform. The extended output shaft 7 operates as a large fan. The extended output shaft 7 drives the large fan to rotate and cool the high-temperature steam. The input shaft 5 is connected to the motor 10 via a plum blossom coupling 11.

[0050] Example 5:

[0051] The main contents of this embodiment are the same as any one of embodiments 1 to 4, wherein an oil drain valve 105 is provided on the side wall of the box body 1. The oil drain valve 105 connects the lower chamber 102 with the outside.

[0052] Example 6:

[0053] The main contents of this embodiment are the same as any one of embodiments 1 to 5, wherein, see Figure 10An oil distribution pipe 3 is also arranged in the box body 1. The oil distribution pipe 3 is connected to the oil channel 201 and the oil outlet of the forced lubrication integrated lubrication seat 9 to perform forced lubrication on multiple specific lubrication points.

[0054] Example 7:

[0055] The main contents of this embodiment are the same as any one of embodiments 1 to 6, wherein the end cover 2 is fixedly connected to the box body 1 by bolts. An observation port is provided on the peripheral wall of the box body 1. The observation port is blocked by an observation cover.

Claims

1. A vertical gearbox for an electric power air-cooling island, characterized by: It comprises a box body (1) and a forced lubrication integrated lubrication seat (9), as well as a transmission unit, a shaft end pump (4) and a dry well sealing structure arranged in the box body (1); The box body (1) is a rectangular box body with a hollow interior; the box body (1) includes a box top, a box bottom and four side walls; a partition (106) and a side plate (107) are arranged in the inner cavity of the box body (1); the partition (106) divides the inner cavity of the box body into an upper chamber (101) and a lower chamber; the side plate (107) is arranged in the lower chamber; the side plate (107) divides the lower chamber into a lower chamber (102) and an output shaft extension chamber (103); the box top and the partition (106) of the box body (1) are arranged in the lower chamber; the side plate (107) divides the lower chamber into a lower chamber (102) and an output shaft extension chamber (103); A bearing mounting hole is provided on the plate surface of the plate (106); the upper end opening of the box body (1) is sealed by an end cover (2); the lower surface of the end cover (2) is provided with an oil passage (201), and corresponding holes (202) for the first axis bearing, corresponding holes (203) for the second axis bearing, and corresponding holes (204) for the third axis bearing corresponding to the box top bearing mounting hole; the corresponding hole (202) for the first axis bearing is provided through, and the corresponding holes (203) for the second axis bearing and the corresponding holes (204) for the third axis bearing are blind holes; The transmission unit is used to achieve a deceleration effect; the transmission unit comprises a vertically arranged input shaft (5), a gear shaft (6) and an extended output shaft (7); the input shaft (5), the gear shaft (6) and the extended output shaft (7) are sequentially connected through a two-stage helical gear pair; the partition (106) is sleeved on the extended output shaft (7) through a bearing mounting hole; the input shaft (5), the gear shaft (6) and the extended output shaft (7) are mounted in the bearing mounting holes on the partition (106) and the box top through bearings; the upper end of the input shaft (5) passes through the box top and extends out of a corresponding hole (202) of a shaft bearing; the upper end of the gear shaft (6) passes through the box top and is accommodated in a corresponding hole (203) of a second shaft bearing; the upper end of the extended output shaft (7) passes through the box top and is accommodated in a corresponding hole (204) of a third shaft bearing, and the lower end passes through the output shaft extension chamber (103) and extends out of the box bottom; The shaft end pump (4) is arranged in the lower chamber (102); the dry well seal structure is arranged in the output shaft extension chamber (103); the dry well seal structure is sleeved on the extended output shaft (7) to prevent lubricating oil from penetrating into the output shaft extension chamber (103); The forced lubrication integrated lubrication seat (9) is arranged outside the box body (1); the oil outlet of the forced lubrication integrated lubrication seat (9) is connected to the oil passage (201), and the oil inlet is communicated with the shaft end pump (4); the oil inlet and oil outlet of the forced lubrication integrated lubrication seat (9) are sealed by fitting with the machined surface of the box body (1) through a sealing gasket; During operation, the shaft end pump (4) draws lubricating oil into the forced lubrication integrated lubrication seat (9) to filter the lubricating oil; the oil then enters the oil passage (201) to lubricate bearings at different positions and the two-stage helical gear pair.

2. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: The invention also includes an intelligent monitoring system (8); the intelligent monitoring system (8) includes a temperature sensor (801), a pressure sensor (802), a temperature control switch (803), a heater (804) and an integrated junction box (805); the temperature sensor (801) is used to measure the temperature of the gear box; the pressure sensor (802) is used to detect the use status of the forced lubrication integrated lubrication seat (9); the heater (804) is used to heat the lubricating oil in the gear box; the temperature control switch (803) and the heater (804) are connected; the temperature sensor (801), the pressure sensor (802) and the temperature control switch (803) are all connected to the integrated junction box (805); the temperature control switch (803) has its own temperature sensor, and the upper and lower limits of the measured temperature are set to ensure that the switch is opened and closed at different temperatures; the heater is controlled by the temperature control switch (803) to ensure the oil temperature when the machine starts.

3. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: The output end is lubricated with lithium-based grease.

4. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: The bottom of the box body (1) is provided with a foot (104); the box body (1) is installed on a high-altitude platform via the foot (104); the lower end of the extended output shaft (7) extends below the high-altitude platform; the working machine of the extended output shaft (7) is a large fan; the extended output shaft (7) drives the large fan to rotate and cool high-temperature water vapor; the input shaft (5) is connected to the motor (10) via a plum blossom coupling (11).

5. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: An oil drain valve (105) is provided on the side wall of the box body (1); the oil drain valve (105) communicates with the lower chamber (102) and the outside world.

6. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: An oil distribution pipe (3) is also arranged in the box body (1); the oil distribution pipe (3) is connected to the oil channel (201) and the oil outlet of the forced lubrication integrated lubrication seat (9), and forced lubrication is performed on multiple specific lubrication points.

7. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: The end cover (2) and the box body (1) are fixedly connected by bolts.

8. The vertical gearbox for an electric power air-cooling island according to claim 1, characterized in that: An observation port is provided on the peripheral wall of the box body (1); the observation port is sealed with an observation cover.

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