CN115871911A - Container stern tube sealing system - Google Patents
Container stern tube sealing system Download PDFInfo
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- CN115871911A CN115871911A CN202211627780.3A CN202211627780A CN115871911A CN 115871911 A CN115871911 A CN 115871911A CN 202211627780 A CN202211627780 A CN 202211627780A CN 115871911 A CN115871911 A CN 115871911A
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- pressure
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- stern
- sealing
- lubricating oil
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T70/00—Maritime or waterways transport
- Y02T70/10—Measures concerning design or construction of watercraft hulls
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Abstract
The invention provides a container ship stern tube sealing system which comprises a ship draft gauge pressure monitoring unit, a valve pressure control unit and a stern tube sealing pressure execution unit, wherein the ship draft gauge pressure monitoring unit is connected with the valve pressure control unit, the valve pressure control unit is connected with the stern tube sealing pressure execution unit, the ship draft gauge pressure monitoring unit is used for monitoring draft pressure signals, the valve pressure control unit is used for receiving the draft pressure signals and air pressure signals and controlling the action of the stern tube sealing pressure execution unit, and the stern tube sealing pressure execution unit controls the air pressure and the oil pressure in the system to be preset values through corresponding valve groups. The ship draft indicator adopted by the invention does not need to be purchased additionally, has low manufacturing cost, controls the air pressure and oil pressure difference according to the stern tube air sealing system dynamically regulated by the ship draft pressure, and prolongs the service life of the sealing ring. Meanwhile, when the air seal is in failure, the stern shaft seal can still automatically and normally operate, and the reliability of the system is improved.
Description
Technical Field
The invention relates to the technical field of ship stern shaft sealing, in particular to a container ship stern tube sealing system.
Background
The ship stern sealing device is one of key components of a ship shafting, the normal work of the ship propulsion device is directly influenced by the performance of the ship stern sealing device, the ship stern sealing device with excellent performance can ensure reliable ship propulsion, and the ship stern sealing device has important significance for preventing ship pollution and protecting the ocean. In recent years, in consideration of environmental protection, performance and other aspects, a great number of hermetic seals are adopted for ship stern seals. However, hermetic sealing has the following drawbacks:
the stern tube sealing system in the prior art must be provided with an air control unit, and the air control unit is a set of equipment assembly for precisely controlling the flow rate of stern tube sealing air, so that the purchase cost is very high.
The stern tube sealing system in the prior art cannot normally continue to operate when an air system fails, and the system reliability is low.
Disclosure of Invention
In view of the above-mentioned technical problems, a container stern tube sealing system is provided. The technical means adopted by the invention are as follows:
the utility model provides a container ship stern pipe sealing system, includes boats and ships draft gauge pressure monitoring unit, valve pressure control unit and stern pipe sealing pressure execution unit, boats and ships draft gauge pressure monitoring unit links to each other with valve pressure control unit, valve pressure control unit links to each other with stern pipe sealing pressure execution unit, boats and ships draft gauge pressure monitoring unit is used for monitoring draft pressure signal, valve pressure control unit is used for receiving draft pressure signal and air pressure signal and controls stern pipe sealing pressure execution unit's action, and stern pipe sealing pressure execution unit is through air pressure and oil pressure to the default in the corresponding valves control system.
Further, the stern tube sealing pressure execution unit comprises a stern tube sealing air pressure control valve, a stern tube oil tank pressure control valve, a stern tube lubricating oil back pressure control valve, a stern tube lubricating oil tank, a stern tube lubricating oil pump, a stern tube lubricating oil cavity and a stern tube air sealing cavity, the stern tube oil tank pressure control valve is connected with the stern tube lubricating oil tank, the stern tube lubricating oil pump is connected with the stern tube lubricating oil tank, the stern tube lubricating oil tank is connected with the stern tube lubricating oil cavity through the stern tube lubricating oil back pressure control valve, and the valve pressure control unit is connected with the stern tube sealing air pressure control valve, the stern tube oil tank pressure control valve and the stern tube lubricating oil back pressure control valve; the valve pressure control unit is also connected with the stern tube air sealing cavity through a stern tube air sealing control valve.
Further, the stern sealing air pressure control valve obtains stern tube air sealing cavity pressure based on the obtained draft gauge pressure monitoring unit draft pressure parameter P1 and the reserved differential pressure constant Pc3, that is, the control parameter P3= P1+ Pc3 of the stern sealing air pressure control valve.
Further, a pressure control parameter P4 of the stern tube oil tank pressure control valve is obtained based on a control parameter P3 of the stern seal air pressure control valve, an outlet pressure P7 when no air pressure exists, and a reserved differential pressure constant Pc4, and specifically: p4= P3-Pc4-P7.
Further, when the air seal fails, the normal operation of the stern tube seal is ensured based on a system consisting of a ship draft gauge pressure monitoring unit, a valve pressure control unit, a stern tube lubricating oil back pressure control valve, a stern tube lubricating oil cabinet, a stern tube lubricating oil pump and a stern tube lubricating oil cavity.
Furthermore, after the valve pressure control unit receives the air pressure failure signal through the air pressure signal feedback line, the opening of the stern tube lubricating oil back pressure control valve is reduced according to draft information of the ship draft gauge pressure monitoring unit, so that the oil pressure in the stern tube lubricating oil cavity is increased, and the stern tube sealing leakage caused by the pressure loss of the stern tube air sealing cavity is avoided through oil pressure complementation.
The ship draft indicator adopted by the invention is equipment which is required to be carried by a ship, and additional purchase is not needed. The design of joint control of all valves in the ship draft gauge, the valve pressure control unit and the stern tube sealing pressure execution unit replaces an air control unit which is originally required in the system, the air control unit is a set of equipment assembly for precisely controlling the flow rate of stern tube sealing air, the purchase cost is very high, and the manufacturing cost is reduced. By using the design of controlling the stern tube lubricating oil back pressure control valve by the valve pressure control unit, when the air seal fails, the stern shaft seal can still automatically and normally operate, and the reliability of the system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the system of the present invention.
In the figure: 1. a pressure monitoring unit of a ship draft gauge; 2. a valve pressure control unit; 3. stern sealing air pressure control valve; 4. a stern tube oil tank pressure control valve; 5. a stern tube lubricating oil back pressure control valve; 6. a stern tube lubricating oil tank; 7. a stern tube lubricating oil pump; 8. a stern tube lubricating cavity; 9. a stern tube air-tight seal cavity; 10. and a stern tube sealing pressure execution unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The invention aims to design a stern tube sealing system for replacing an air control unit, which directly adjusts the hermetic sealing pressure of a stern tube by feeding back a Draft signal through a Draft indicator (Draft Gauge) so as to realize the design of replacing the air control unit which must be equipped in the stern tube sealing system in the prior art; the invention designs a technical scheme of how to automatically enable the stern tube sealing system to normally operate when the air sealing fails. Specifically, as shown in fig. 1, the embodiment of the invention discloses a container ship stern tube sealing system, which comprises a ship draft gauge pressure monitoring unit 1, a valve pressure control unit 2 and a stern tube sealing pressure execution unit 10, wherein the ship draft gauge pressure monitoring unit is connected with the valve pressure control unit, the valve pressure control unit is connected with the stern tube sealing pressure execution unit, the ship draft gauge pressure monitoring unit is used for monitoring draft pressure signals, the valve pressure control unit is used for receiving the draft pressure signals and air pressure signals and controlling the action of the stern tube sealing pressure execution unit, and the stern tube sealing pressure execution unit controls the air pressure and the oil pressure in the system to preset values through corresponding valve groups.
The stern tube sealing pressure execution unit comprises a stern sealing air pressure control valve 3, a stern tube oil tank pressure control valve 4, a stern tube lubricating oil back pressure control valve 5, a stern tube lubricating oil tank 6, a stern tube lubricating oil pump 7, a stern tube lubricating oil cavity 8 and a stern tube air sealing cavity 9, the stern tube oil tank pressure control valve is connected with the stern tube lubricating oil tank, the stern tube lubricating oil pump is connected with the stern tube lubricating oil tank, the stern tube lubricating oil tank is connected with the stern tube lubricating oil cavity through the stern tube lubricating oil back pressure control valve, and the valve pressure control unit is connected with the stern sealing air pressure control valve, the stern tube oil tank pressure control valve and the stern tube lubricating oil back pressure control valve; the valve pressure control unit is also connected with the stern tube air sealing cavity through a stern tube air sealing control valve.
The stern sealing air pressure control valve obtains stern tube air sealing cavity pressure based on the obtained draft gauge pressure monitoring unit draft pressure parameter P1 and the reserved differential pressure constant Pc3, namely the control parameter P3= P1+ Pc3 of the stern sealing air pressure control valve.
The pressure control parameter P4 of the stern tube oil tank pressure control valve is obtained based on the control parameter P3 of the stern sealing air pressure control valve, the outlet pressure P7 when no air pressure exists and a reserved differential pressure constant Pc4, and the method specifically comprises the following steps: p4= P3-Pc4-P7.
When the air seal fails, the system formed by the ship draft gauge pressure monitoring unit, the valve pressure control unit, the stern tube lubricating oil back pressure control valve, the stern tube lubricating oil cabinet, the stern tube lubricating oil pump and the stern tube lubricating oil cavity ensures the normal work of the stern tube seal.
After the air seal fails, the valve pressure control unit receives an air pressure failure signal through an air pressure signal feedback line, and reduces the opening of the stern tube lubricating oil back pressure control valve according to draft information of the ship draft gauge pressure monitoring unit, so that the oil pressure in a stern tube lubricating oil cavity is increased, and the stern tube seal leakage caused by the pressure loss of the stern tube air seal cavity is avoided through oil pressure complementation.
In summary, the Draft Gauge (Draft Gauge) is a device which must be carried by the ship itself, and no additional purchase is needed. By using the design of controlling the stern tube lubricating oil back pressure control valve by the valve pressure control unit, when the hermetic seal fails, the stern shaft seal can still automatically and normally operate, and the reliability of the system is improved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a container ship stern pipe sealing system, its characterized in that, includes boats and ships draft gauge pressure monitoring unit, valve pressure control unit and stern pipe sealing pressure execution unit, boats and ships draft gauge pressure monitoring unit links to each other with valve pressure control unit, valve pressure control unit links to each other with stern pipe sealing pressure execution unit, boats and ships draft gauge pressure monitoring unit is used for monitoring draft pressure signal, valve pressure control unit is used for receiving draft pressure signal and air pressure signal and controls stern pipe sealing pressure execution unit's action, and stern pipe sealing pressure execution unit passes through air pressure and oil pressure to the default in the corresponding valves control system.
2. The stern tube sealing system of claim 1, wherein the stern tube sealing pressure performing unit comprises a stern sealing pneumatic control valve, a stern tube conservator pressure control valve, a stern tube lubricating oil back pressure control valve, a stern tube lubricating oil conservator, a stern tube lubricating oil pump, a stern tube lubricating oil cavity and a stern tube pneumatic sealing cavity, the stern tube conservator pressure control valve is connected with the stern tube lubricating oil conservator, the stern tube lubricating oil pump is connected with the stern tube lubricating oil conservator, the stern tube lubricating oil conservator is connected with the stern tube lubricating oil cavity through the stern tube lubricating oil back pressure control valve, and the valve pressure control unit is connected with the stern sealing pneumatic control valve, the stern tube conservator pressure control valve and the stern tube lubricating oil back pressure control valve; the valve pressure control unit is also connected with the stern tube air sealing cavity through a stern tube air sealing control valve.
3. The container ship stern tube sealing system of claim 2, wherein the stern tube sealing pneumatic control valve obtains stern tube hermetic seal cavity pressure, namely control parameter P3= P1+ Pc3 of the stern tube sealing pneumatic control valve, based on the obtained draft gauge pressure monitoring unit draft pressure parameter P1 and the reserved differential pressure constant Pc3.
4. The container ship stern tube sealing system of claim 2, wherein the pressure control parameter P4 of the stern tube conservator pressure control valve is obtained based on the control parameter P3 of the stern tube conservator pressure control valve, the outlet pressure P7 when no air pressure exists and the reserved differential pressure constant Pc4, and specifically comprises: p4= P3-Pc4-P7.
5. The container ship stern tube sealing system of claim 2, wherein when the hermetic seal fails, the stern tube seal is ensured to normally operate based on a system consisting of a ship draft gauge pressure monitoring unit, a valve pressure control unit, a stern tube lubricating oil back pressure control valve, a stern tube lubricating oil tank, a stern tube lubricating oil pump and a stern tube lubricating oil cavity.
6. The container ship stern tube sealing system according to claim 1 or 5, wherein after the valve pressure control unit receives the air pressure failure signal through the air pressure signal feedback line, the opening of the stern tube lubricating oil back pressure control valve is reduced according to draft information of the ship draft gauge pressure monitoring unit, so that the oil pressure in the stern tube lubricating oil cavity is increased, and stern tube sealing leakage caused by pressure loss of the stern tube air sealing cavity is avoided through oil pressure complementation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627780.3A CN115871911A (en) | 2022-12-16 | 2022-12-16 | Container stern tube sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211627780.3A CN115871911A (en) | 2022-12-16 | 2022-12-16 | Container stern tube sealing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115871911A true CN115871911A (en) | 2023-03-31 |
Family
ID=85753886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211627780.3A Pending CN115871911A (en) | 2022-12-16 | 2022-12-16 | Container stern tube sealing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115871911A (en) |
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2022
- 2022-12-16 CN CN202211627780.3A patent/CN115871911A/en active Pending
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