CN107762702B - Air distributor, diesel engine compressed air starting device and large diesel engine - Google Patents
Air distributor, diesel engine compressed air starting device and large diesel engine Download PDFInfo
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- CN107762702B CN107762702B CN201711122705.0A CN201711122705A CN107762702B CN 107762702 B CN107762702 B CN 107762702B CN 201711122705 A CN201711122705 A CN 201711122705A CN 107762702 B CN107762702 B CN 107762702B
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- air
- air distribution
- shell
- distribution cylinder
- diesel engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N9/00—Starting of engines by supplying auxiliary pressure fluid to their working chambers
- F02N9/04—Starting of engines by supplying auxiliary pressure fluid to their working chambers the pressure fluid being generated otherwise, e.g. by compressing air
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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
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses an air distributor, which comprises a cam shaft, a compression spring, a conical cylindrical air distribution cylinder and a shell, wherein the air distribution cylinder is coaxially and tightly arranged in a conical hole of the shell, a small hole is formed in the conical surface of the air distribution cylinder in a penetrating manner, and a plurality of through holes are correspondingly formed in the conical surface of the shell along the circumferential direction; the camshaft passes through the shell and the air distribution cylinder in sequence along the axis and is in driving connection with the air distribution cylinder, an annular boss is arranged at one end of the camshaft extending into the air distribution cylinder, the compression spring is sleeved on the camshaft, and two ends of the compression spring respectively tightly support against the annular boss and the air distribution cylinder, so that the matching surfaces of the conical cylindrical air distribution cylinder and the shell are always tightly matched. The invention also discloses a compressed air starting device of the diesel engine and a large-sized diesel engine. The invention has the advantages of simple structure, convenient assembly and disassembly, low cost, reliable operation and the like, can effectively reduce air leakage caused by abrasion of the air distributor, and ensures the air inlet pressure.
Description
Technical Field
The invention relates to a large and medium diesel engine starting technology, in particular to an air distributor, a diesel engine compressed air starting device and a large diesel engine.
Background
Large and medium diesel engines are started by compressed air. The compressed air started diesel engine is to send air with certain pressure into the cylinder through the power stroke according to the ignition sequence of the diesel engine, the piston is pushed to move by means of the expansion of the compressed air, the crankshaft is driven to rotate through the connecting rod, and after the crankshaft speed reaches the minimum starting speed, the diesel oil sprayed into the cylinder is automatically ignited for combustion, so that the diesel engine is started. In long-term use, each part of the existing air distributor is easy to wear, poor in sealing and air leakage are caused, so that the service performance of the diesel engine is affected, and along with the increasing severe requirements of laws and regulations on the performance and environmental protection of the diesel engine, the design optimization of the air distributor is very important.
Disclosure of Invention
Aiming at the technical problems, the invention aims to solve the problems by designing an air distributor, a diesel engine compressed air starting device and a large diesel engine so as to reduce the air leakage amount during the starting of the diesel engine and improve the air inlet pressure.
Aiming at the situation, the technical solution provided by the invention is as follows:
an air dispenser comprising: the air distribution cylinder is coaxially and tightly arranged in a taper hole of the shell, a certain gap is reserved between the sealing end of the air distribution cylinder and the sealing end of the shell, a small hole is formed in the conical surface of the air distribution cylinder in a penetrating manner, and a plurality of through holes which are connected with corresponding air cylinders through pipelines are correspondingly formed in the conical surface of the shell in the circumferential direction; the camshaft pass casing and air distribution section of thick bamboo sealed end in proper order along the axis and with air distribution section of thick bamboo is sealed drive connection each other, camshaft stretch into air distribution section of thick bamboo's one end be provided with annular boss, compression spring cover establish the camshaft on and both ends tightly support respectively annular boss with on the inner wall of air distribution section of thick bamboo tip, make the mating surface of conical barrel-shaped air distribution section of thick bamboo and casing closely cooperate all the time. The camshaft drives the air distribution cylinder to rotate, compressed air is sent into the designated cylinder through the small hole and the corresponding through hole according to the required starting timing according to the ignition sequence of each cylinder of the diesel engine, and the diesel engine is ensured to enter normal operation.
Preferably, the air distribution cylinder is made of silicon-chromium steel.
Preferably, the material of the shell is aluminum alloy.
Preferably, the taper of the air distribution cylinder and the housing is 50 ° -80 °.
Preferably, the opening end of the shell is provided with an interface for connecting an air inlet pipe, so that the air inlet pipe can be conveniently, quickly and reliably connected.
Preferably, the number of through holes on the housing is the same as the number of cylinders and is arranged in the order of firing the cylinders.
Preferably, a gap of 20mm-30mm is reserved between the sealing end of the air distribution cylinder and the sealing end of the shell. If the gap is too small, the air distribution cylinder may be slightly worn and collide with the sealing end of the shell under the pushing of the spring, so that sealing can not be realized through movement, and if the gap is too large, the sealing area of the air distribution cylinder and the shell may be relatively small, so that air is leaked.
The compressed air starting device of the diesel engine comprises an air compressor and further comprises an air distributor, wherein the input end of the air distributor is connected with the air compressor through a pipeline.
The large diesel engine comprises a compressed air starting device provided with an air compressor, and further comprises an air distributor, wherein the input end and the output end of the air distributor are respectively connected with the air compressor and a corresponding cylinder through pipelines.
Compared with the prior art, the invention has the advantages of simple structure, convenient assembly and disassembly, low cost, reliable operation and the like, can effectively reduce air leakage caused by abrasion of the air distributor, and increases the air inlet pressure.
Drawings
FIG. 1 is a schematic three-dimensional view of an air distributor according to an embodiment of the present invention.
Fig. 2 is a schematic front view of an air distributor according to an embodiment of the present invention.
Fig. 3 is a schematic cross-sectional view of A-A in fig. 2.
In the figure: 1-a housing; 2-an air distribution cylinder; 3-a camshaft; 4-hold-down spring.
Detailed Description
The following detailed description of the present invention is provided by way of specific examples, which are not intended to be exhaustive, but are not intended to limit the invention to the following examples.
Example 1
As shown in fig. 1 to 3, an air distributor includes: the air distribution cylinder 2 is coaxially and tightly arranged in a taper hole of the shell 1, a 30mm gap is reserved between the sealing end of the air distribution cylinder 2 and the sealing end of the shell 1, a small hole penetrates through the taper surface of the air distribution cylinder 2, and a plurality of through holes which are connected with corresponding air cylinders through pipelines are correspondingly arranged on the taper surface of the shell 1 along the circumferential direction; the camshaft 3 sequentially passes through the sealing ends of the shell 1 and the air distribution cylinder 2 along the axis and is in sealing driving connection with the air distribution cylinder 2, an annular boss is arranged at one end of the camshaft extending into the air distribution cylinder, and the compression spring is sleeved on the camshaft, and two ends of the compression spring are respectively tightly abutted against the annular boss and the inner wall of the small end of the air distribution cylinder, so that the matching surfaces of the conical cylindrical air distribution cylinder and the shell are always tightly matched.
The air distribution cylinder 2 is made of silicon chromium steel. The shell 1 is made of aluminum alloy.
The opening end of the shell 1 is provided with an interface for connecting an air inlet pipe and is used for quickly connecting the air inlet pipe.
The number of through holes on the shell 1 is the same as the number of the air cylinders and the through holes are arranged according to the firing sequence of the air cylinders.
The air distribution cylinder 2 is connected with an air inlet pipe, in the rotating process, small holes on the air distribution cylinder 2 are sequentially communicated with all through holes on the shell, and the other ends of the through holes are connected with corresponding air cylinders through pipes. When high-pressure air enters the air distribution cylinder 2 driven by the cam shaft 3 to rotate through the air inlet pipe, small holes on the air distribution cylinder 2 send the high-pressure air into corresponding cylinders through the through holes according to the ignition sequence, the pistons are pushed to move so as to drive the crankshafts to rotate, and after the rotating speed of the crankshafts reaches the minimum starting rotating speed, diesel oil sprayed into the cylinders automatically ignites and burns, so that the starting of the diesel engine is realized.
The components of the air distributor wear over time. The conventional distributor disc type air distributor is worn to cause the distribution disc to be not tightly sealed with the distributor shell, so that the air inlet pressure is reduced. The invention uses the cone-shaped cylinder as the air distribution device, and the worn air distribution cylinder 2 can move under the action of the compression spring 4, so that the air distribution cylinder 2 is always tightly attached to the shell 1, the air leakage quantity is reduced, the air inlet pressure is increased, and the problems of poor sealing and reduced air inlet pressure of the air distribution device caused by the abrasion of all parts are solved.
Example two
The compressed air starting device for the diesel engine comprises an air compressor and further comprises an air distributor, wherein the input end of the air distributor is connected with the air compressor through a pipeline, each output end of the air distributor is connected with a corresponding cylinder through a pipeline, high-pressure air output by the air compressor is distributed according to requirements and then is sent into the corresponding cylinder, the piston is pushed to move so as to drive a crankshaft to rotate, and after the rotating speed of the crankshaft reaches the minimum starting rotating speed, diesel oil sprayed into the cylinder is automatically ignited and combusted, so that the starting of the diesel engine is realized.
Example III
The compressed air starting device comprises an air distributor, wherein an input end and an output end of the air distributor are respectively connected with the air compressor and a corresponding cylinder through pipelines, high-pressure air output by the air compressor is distributed according to requirements and then is sent into the corresponding cylinder to push a piston to move so as to drive a crankshaft to rotate, and after the crankshaft rotation speed reaches the minimum starting rotation speed, diesel oil sprayed into the cylinder is automatically ignited and combusted, so that the starting of the diesel engine is realized.
The above examples of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (9)
1. An air dispenser, comprising: the air distribution cylinder is coaxially and tightly arranged in a taper hole of the shell, a certain gap is reserved between the sealing end of the air distribution cylinder and the sealing end of the shell, a small hole positioned on the taper surface of the air distribution cylinder is penetrated and arranged on the taper surface of the air distribution cylinder, and a plurality of through holes connected with corresponding cylinders through pipelines are correspondingly arranged on the taper surface of the shell along the circumferential direction; the camshaft pass casing and air distribution section of thick bamboo sealed end in proper order along the axis and with air distribution section of thick bamboo is sealed drive connection each other, camshaft stretch into air distribution section of thick bamboo's one end be provided with annular boss, compression spring cover establish the camshaft on and both ends tightly support respectively annular boss with on the inner wall of air distribution section of thick bamboo tip, make the mating surface of conical barrel-shaped air distribution section of thick bamboo and casing closely cooperate all the time.
2. An air distributor according to claim 1, wherein: the air distribution cylinder is made of silicon-chromium steel.
3. An air distributor according to claim 1, wherein: the shell is made of aluminum alloy.
4. An air distributor according to claim 1, wherein: the taper of the air distribution cylinder and the shell is 50-80 degrees.
5. An air distributor according to claim 1, wherein: the opening end of the shell is provided with an interface for connecting an air inlet pipe.
6. An air distributor according to claim 1, wherein: the number of through holes on the shell is the same as the number of the air cylinders and the through holes are arranged according to the ignition sequence of the air cylinders.
7. An air distributor according to claim 1, wherein: a gap of 20mm-30mm is reserved between the sealing end of the air distribution cylinder and the sealing end of the shell.
8. A compressed air starting device for a diesel engine, comprising an air compressor, and further comprising an air distributor according to any one of claims 1 to 7, wherein the air distributor input is connected to the air compressor via a pipeline.
9. The utility model provides a large-scale diesel engine, includes the compressed air starting drive who is equipped with air compressor, its characterized in that: the compressed air starting device further comprises an air distributor according to any one of claims 1 to 7, wherein the input end and the output end of the air distributor are respectively connected with the air compressor and the corresponding air cylinder through pipelines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122705.0A CN107762702B (en) | 2017-11-14 | 2017-11-14 | Air distributor, diesel engine compressed air starting device and large diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711122705.0A CN107762702B (en) | 2017-11-14 | 2017-11-14 | Air distributor, diesel engine compressed air starting device and large diesel engine |
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| Publication Number | Publication Date |
|---|---|
| CN107762702A CN107762702A (en) | 2018-03-06 |
| CN107762702B true CN107762702B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201711122705.0A Active CN107762702B (en) | 2017-11-14 | 2017-11-14 | Air distributor, diesel engine compressed air starting device and large diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114033594B (en) * | 2021-11-26 | 2023-04-07 | 山西柴油机工业有限责任公司 | Connection structure of diesel engine and air distributor, clutch and air distributor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1371220A (en) * | 1971-11-30 | 1974-10-23 | Semt | Rotating pneumatic starting device for an internal combustion engine |
| CN86107583A (en) * | 1985-11-05 | 1987-11-04 | 奥格斯堡·纽伦堡机械公司伯迈斯特与韦恩柴油机分公司 | The control air distributor of reversible combustion engine |
| CN103206278A (en) * | 2013-01-25 | 2013-07-17 | 祥天控股（集团）有限公司 | Air distribution system of aerodynamic engines |
| CN206409333U (en) * | 2017-01-22 | 2017-08-15 | 宁波大学 | A kind of diesel engine air distributor |
| CN107269440A (en) * | 2017-06-30 | 2017-10-20 | 中船动力研究院有限公司 | Medium seed diesel engine starting air distributor |
-
2017
- 2017-11-14 CN CN201711122705.0A patent/CN107762702B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1371220A (en) * | 1971-11-30 | 1974-10-23 | Semt | Rotating pneumatic starting device for an internal combustion engine |
| CN86107583A (en) * | 1985-11-05 | 1987-11-04 | 奥格斯堡·纽伦堡机械公司伯迈斯特与韦恩柴油机分公司 | The control air distributor of reversible combustion engine |
| CN103206278A (en) * | 2013-01-25 | 2013-07-17 | 祥天控股（集团）有限公司 | Air distribution system of aerodynamic engines |
| CN206409333U (en) * | 2017-01-22 | 2017-08-15 | 宁波大学 | A kind of diesel engine air distributor |
| CN107269440A (en) * | 2017-06-30 | 2017-10-20 | 中船动力研究院有限公司 | Medium seed diesel engine starting air distributor |
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| Publication number | Publication date |
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| CN107762702A (en) | 2018-03-06 |
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