CN210416944U - Energy-saving ship tail shaft sealing system - Google Patents
Energy-saving ship tail shaft sealing system Download PDFInfo
- Publication number
- CN210416944U CN210416944U CN201920888264.3U CN201920888264U CN210416944U CN 210416944 U CN210416944 U CN 210416944U CN 201920888264 U CN201920888264 U CN 201920888264U CN 210416944 U CN210416944 U CN 210416944U
- Authority
- CN
- China
- Prior art keywords
- oil tank
- tail shaft
- lubricating oil
- tail
- oil pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 15
- 239000010687 lubricating oil Substances 0.000 claims abstract description 37
- 239000003921 oil Substances 0.000 claims abstract description 33
- 230000005484 gravity Effects 0.000 claims abstract description 23
- 239000010724 circulating oil Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
Images
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- Sealing Devices (AREA)
Abstract
The utility model provides an energy-saving boats and ships tail shaft sealing system, includes the tail shaft, the tail pipe, the gravity oil tank, the circulation oil tank, lubricating oil pump and heat exchanger, the gravity oil tank communicates tail pipe, heat exchanger, lubricating oil pump, circulation oil tank and gravity oil tank in proper order through oil pipe, boats and ships diesel engine flywheel is connected to tail shaft one end, diesel engine flywheel top is equipped with speed sensor, still includes the PLC controller, speed sensor electricity connects the PLC controller input, the PLC controller output passes through the converter and connects lubricating oil pump. The utility model discloses can change the lubricating oil pump flow along with the change of tailing axle rotational speed, when guaranteeing the tailing axle and normally cooling, reduce the lubricating oil pump power consumption, the energy saving.
Description
Technical Field
The utility model relates to an energy-saving boats and ships tail shaft sealing system.
Background
The tail shaft of the ship rotates in the tail pipe to drive the underwater propeller to rotate, the tail shaft needs to take heat generated by the tail pipe away through lubricating oil while rotating in the tail pipe, the lubricating oil of the tail shaft is led in to push the lip-shaped sealing ring and the filler to wrap the tail shaft to move radially so as to seal the tail shaft, the flow rate of the lubricating oil pumped into the tail shaft by the existing lubricating oil pump is set according to 75% of the rotating speed of diesel oil, 75% of the rotating speed of the diesel engine is maintained, the temperature of the tail shaft can be kept lower than 50 ℃ by the aid of the flow rate of the lubricating oil, and when the rotating speed of the tail shaft is higher than 10% of the rotating speed; the heat generated by friction of the tail shaft is in direct proportion to the rotating speed, the sealing effect of the tail shaft is in inverse proportion to the rotating speed of the tail shaft, and when the rotating speed of the tail shaft is lower than 75%, lubricating oil suitable for 75% of flow is still introduced, so that energy is wasted undoubtedly, and particularly, a ship is difficult to supply energy.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is an energy-saving boats and ships tailing axle sealing system can change the lubricating oil pump flow along with the change of tailing axle rotational speed, when guaranteeing the normal cooling of tailing axle, reduces the lubricating oil pump power consumption, the energy saving.
In order to solve the above problem, the to-be-solved technical scheme of the utility model is:
the utility model provides an energy-saving boats and ships tail shaft sealing system, includes the tail shaft, the tail pipe, the gravity oil tank, the circulation oil tank, lubricating oil pump and heat exchanger, the gravity oil tank communicates tail pipe, heat exchanger, lubricating oil pump, circulation oil tank and gravity oil tank in proper order through oil pipe, boats and ships diesel engine flywheel is connected to tail shaft one end, diesel engine flywheel top is equipped with speed sensor, still includes the PLC controller, speed sensor electricity connects the PLC controller input, the PLC controller output passes through the converter and connects lubricating oil pump.
The top of the gravity oil tank is communicated with a compressed air source through an air inlet pipe, and a pressure maintaining tank is arranged on the air inlet pipe.
The air inlet pipe is connected with the exhaust pipe, the air inlet pipe and the exhaust pipe are respectively connected with the first electromagnetic valve and the second electromagnetic valve, the air inlet pipe is provided with the pressure sensor, and the pressure sensor is electrically connected with the input end of the PLC.
The technical effects of the utility model are that: the rotation speed sensor transmits the monitored rotation speed of the tail shaft to the PLC, and the PLC adjusts the flow of the lubricating oil pump according to the rotation speed of the tail shaft, so that the flow of the lubricating oil changes according to the rotation speed of the tail shaft, the temperature of the tail shaft is kept to be lower than 50 ℃ all the time, the energy consumption of the lubricating oil pump is reduced, and energy is saved.
Drawings
The invention will be further explained with reference to the drawings:
figure 1 is a schematic structural diagram of the present invention,
figure 2 is a circuit diagram of the present invention,
fig. 3 is a relationship diagram of the rotation speed of the tail shaft and the flow rate of the lubricating oil pump.
In the figure: the device comprises a tail shaft 1, a heat exchanger 2, a lubricating oil pump 3, a circulating oil tank 4, a rotating speed sensor 5, a gravity oil tank 6, a pressure maintaining tank 7, a second electromagnetic valve 8, a pressure sensor 9, a first electromagnetic valve 10, a ship diesel engine flywheel 11 and a tail pipe 12.
Detailed Description
As shown in fig. 1 to 3, the energy-saving ship tail shaft sealing system comprises a tail shaft 1, a tail pipe 12, a gravity oil tank 6, a circulating oil tank 4, a lubricating oil pump 3 and a heat exchanger 2, wherein the gravity oil tank 6 is sequentially communicated with the tail pipe 12, the heat exchanger 2, the lubricating oil pump 3, the circulating oil tank 4 and the gravity oil tank 6 through oil pipes, one end of the tail shaft 1 is connected with a ship diesel engine flywheel 11, a rotating speed sensor 5 is arranged above the diesel engine flywheel 11, the energy-saving ship tail shaft sealing system further comprises a PLC (programmable logic controller), the rotating speed sensor 5 is electrically connected with the input end of the PLC, and the output end of the PLC is connected with.
The utility model discloses a working process and theory of operation do: when the rotation speed sensor 5 detects that the rotation speed of the tail shaft 1 is lower than 50rpm/min, the PLC controller controls the lubricating oil pump to stop, and the gravity oil tank 6 is used for supplying oil to the tail shaft 1 to reduce the temperature; when the rotating speed is higher than 50rpm/min, as shown in fig. 3, the flow of the lubricating oil pump is controlled by the PLC through the frequency converter according to the rotating speed of the tail shaft 1, the lubricating oil in the lubricating oil tank is firstly sent into the heat exchanger 2 to be cooled by the lubricating oil pump, then is sent into the tail shaft 1 to be cooled, and then enters the gravity oil tank 6 to automatically flow into the circulating oil tank 4 to form circulation.
The top of the gravity oil tank 6 is communicated with a compressed air source through an air inlet pipe, and a pressure maintaining tank 7 is arranged on the air inlet pipe. 2bar atmospheric pressure is gone into in the pressurize jar 7, maintains that the lubricating oil pressure of tailing axle 1 is at 1.8bar to 2bar by compressed air that gravity oil tank 6 applyed, guarantees in the tailing axle 1 that the lubricating oil can push up the packing and seal or the sealing washer lip holds tailing axle 1 tightly, when guaranteeing that tailing axle 1 is sealed, guarantees that tailing axle 1 cools down.
The air inlet pipe is communicated with the exhaust pipe, the air inlet pipe and the exhaust pipe are respectively communicated with a first electromagnetic valve 10 and a second electromagnetic valve 8, the air inlet pipe is provided with a pressure sensor 9, and the pressure sensor 9 is electrically connected with the input end of the PLC. The pressure sensor 9 monitors the air pressure in the gravity oil tank 6 in real time, when the pressure is lower than 2bar, the first electromagnetic valve 10 is opened, and the compressed air pushes lubricating oil to pressurize the tail shaft 1; when the rotating speed of the tail shaft 1 rises to cause the lubricating oil pressure in the tail shaft 1 to be higher than 2bar, the second electromagnetic valve 8 is opened to connect the gravity oil tank 6 with the atmosphere, the gravity oil tank 6 is decompressed, and the phenomenon that the lubricating oil of the tail shaft 1 excessively pushes against a sealing ring due to overhigh pressure and then leaks is avoided; the lubricating oil pressure in the tail shaft 1 can be freely adjusted along with the rotating speed of the tail shaft 1.
Claims (3)
1. The utility model provides an energy-saving boats and ships tail shaft sealing system, includes tail shaft (1), tail pipe (12), gravity oil tank (6), circulation oil tank (4), lubricating oil pump (3) and heat exchanger (2), its characterized in that: the gravity oil tank (6) is sequentially communicated with a tail pipe (12), a heat exchanger (2), a lubricating oil pump (3), a circulating oil tank (4) and the gravity oil tank (6) through oil pipes, one end of a tail shaft (1) is connected with a ship diesel engine flywheel (11), a rotating speed sensor (5) is arranged above the diesel engine flywheel (11), the gravity oil tank further comprises a PLC, the rotating speed sensor (5) is electrically connected with the input end of the PLC, and the output end of the PLC is connected with the lubricating oil pump through a frequency converter.
2. The energy saving marine tail shaft sealing system of claim 1, wherein: the top of the gravity oil tank (6) is communicated with a compressed air source through an air inlet pipe, and a pressure maintaining tank (7) is arranged on the air inlet pipe.
3. The energy saving marine tail shaft sealing system of claim 2, wherein: the air inlet pipe is connected with the exhaust pipe, the air inlet pipe and the exhaust pipe are respectively connected with a first electromagnetic valve (10) and a second electromagnetic valve (8), the air inlet pipe is provided with a pressure sensor (9), and the pressure sensor (9) is electrically connected with the input end of the PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920888264.3U CN210416944U (en) | 2019-06-13 | 2019-06-13 | Energy-saving ship tail shaft sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920888264.3U CN210416944U (en) | 2019-06-13 | 2019-06-13 | Energy-saving ship tail shaft sealing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210416944U true CN210416944U (en) | 2020-04-28 |
Family
ID=70375180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920888264.3U Expired - Fee Related CN210416944U (en) | 2019-06-13 | 2019-06-13 | Energy-saving ship tail shaft sealing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210416944U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586923A (en) * | 2021-07-27 | 2021-11-02 | 武汉理工大学 | Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition |
-
2019
- 2019-06-13 CN CN201920888264.3U patent/CN210416944U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113586923A (en) * | 2021-07-27 | 2021-11-02 | 武汉理工大学 | Automatic lubricant supply system for water-lubricated tail bearing of ship under low-speed working condition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200428 |