CN215907957U - Stop device of marine diesel engine - Google Patents
Stop device of marine diesel engine Download PDFInfo
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- CN215907957U CN215907957U CN202122270706.8U CN202122270706U CN215907957U CN 215907957 U CN215907957 U CN 215907957U CN 202122270706 U CN202122270706 U CN 202122270706U CN 215907957 U CN215907957 U CN 215907957U
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Abstract
The parking device of the marine diesel engine is characterized in that an electromagnetic valve used for controlling the on-off of compressed air in a pipe is arranged on an air outlet pipe, an air outlet of a compressed air bottle is communicated with one end of the air outlet pipe, the other end of the air outlet pipe is communicated with air inlets on a plurality of high-pressure oil pumps, an air cavity communicated with the air inlets is arranged in the high-pressure oil pumps, and the compressed air in the compressed air bottle enters the air cavity through the air outlet pipe by controlling the electromagnetic valve to jack up a plunger in the high-pressure oil pumps, so that the roller of the high-pressure oil pumps is separated from a cam. The utility model solves the problem of stopping the diesel engine when the speed regulator and the auxiliary stopping device cannot normally work by optimizing the structure of the high-pressure oil pump, meets the design requirements of different types of high-pressure oil pumps and the stopping requirements of the diesel engine, realizes the reliable stopping function of the diesel engine, ensures the running safety of the diesel engine, provides a design basis for the development and the development of a subsequent novel diesel engine, and has the advantages of simple structure, convenient and quick operation, low design cost and higher use value.
Description
Technical Field
The utility model belongs to the technical field of diesel engines, and particularly relates to a parking device of a marine diesel engine.
Background
The parking function is a basic function which the engine should have, and particularly when the engine runs abnormally and the diesel engine flies and other faults occur, the engine must be stopped quickly and reliably to avoid serious faults. The diesel engine stopping function is the safety guarantee of the engine and is indispensable. The parking function of the common marine diesel engine is realized by two ways: the stopping function of the speed regulator is as follows: the governor is one of the important devices on the diesel engine, and the governor has the function of realizing the control of the running state of the diesel engine, such as: the high-pressure oil pump control system comprises a speed regulator, a high-pressure oil pump rack control rod, a high-pressure oil pump rack pull rod, a high-pressure oil pump rack control rod, a high-pressure oil pump and a high-pressure oil pump, wherein the high-pressure oil pump rack control rod is connected between the speed regulator and the high-pressure oil pump; the speed regulator has a parking function, when a control room sends a parking signal to the speed regulator, a rack of the speed regulator returns to a zero position (parking position), the output swing arm of the high-pressure oil pump drives a rack control rod of the high-pressure oil pump to push the rack of the high-pressure oil pump to the zero position or negative grid number of the rack, the high-pressure oil pump stops injecting oil into the combustion chamber, the rotating speed of the diesel engine is gradually reduced, and finally the diesel engine stops rotating and stops; adopting an auxiliary parking device for parking: the runaway condition can occur when the diesel engine runs, particularly when a newly produced diesel engine is subjected to a primary test, the runaway refers to the situation that the speed regulator cannot control the rotating speed of the diesel engine and cannot stop when the diesel engine runs, the rotating speed of the diesel engine is rapidly increased, and the runaway is a serious diesel engine fault, and if the diesel engine cannot be stopped in time, serious consequences can be caused, and safety accidents can possibly develop; in order to avoid the risk caused by the fact that the diesel engine cannot stop due to the fact that a speed governor is out of control, an auxiliary stopping device is installed on the diesel engine and consists of a compressed air bottle, an electromagnetic valve, a stopping jack and an air pipeline; the compressed air in the solenoid valve control compressed air bottle gets into pneumatic jack, and pneumatic jack's top links together with high-pressure oil pump rack control lever, and its theory of operation is: when a stop signal is sent to the electromagnetic valve, the electromagnetic valve is opened, compressed air enters the pneumatic jack, the jack pushes the rack control rod of the high-pressure oil pump, the control rod pushes the rack of the high-pressure oil pump to a zero position or a negative grid number, the oil injection to the combustion chamber is stopped when the position is higher than the position where the oil pump stops injecting oil, the rotating speed of the diesel engine is gradually reduced, the rotation is finally stopped, and the diesel engine is stopped;
although the auxiliary stopping device can avoid the risk caused by the out-of-control speed regulator, the two stopping modes still have the following defects: 1) when the high-pressure oil pump rack is stuck, the speed regulator and the auxiliary parking device cannot push the rack pull rod and cannot push the high-pressure oil pump rack to a zero position or a negative grid number, so that the diesel engine is parked and is out of control, and at the moment, a parking signal is sent out, the diesel engine is quickly unloaded, but the high-pressure oil pump rack is still at a high-load rack position, so that the diesel engine flies; 2) for a multi-cylinder diesel engine, when the connecting part of a high-pressure oil pump rack pull rod and a high-pressure oil pump control pull rod of a certain cylinder or a plurality of cylinders is loosened, a speed regulator and an auxiliary parking device cannot control the loosened high-pressure oil pump rack, the diesel engine cannot be parked, the diesel engine is out of control, similarly, a parking signal is sent, the diesel engine is quickly unloaded, but part of the high-pressure oil pump rack is still at the position of a high-load rack, and the diesel engine also flies; the application number is 201621093310.3, the name is ' emergency stop device of marine diesel engine ' (hereinafter referred to as comparison document), ' the problem that the rapid return handle on the regulation transmission device is easy to be broken and damaged in use, or the rack of the fuel injection pump of a certain cylinder is blocked, the whole regulation transmission device can be out of work, the fuel injection pumps of other cylinders are pulled, the fuel injection pumps of other cylinders can continue to supply fuel, the rotating speed of the diesel engine is increased to exceed the limit rotating speed, and safety accidents occur is solved, concretely, the high-pressure air generating device is communicated with a plurality of fuel injection pumps communicated with an air outlet pipe through an air inlet pipeline, an emergency stop control valve, the air outlet pipe, and the fuel injection pumps, thereby the on-off of the high-pressure air in the air outlet pipe and the fuel injection pumps are controlled by controlling the emergency stop control valve, when the high-pressure air enters the fuel injection pumps, under the action of huge impact force applied to the racks of the fuel injection pumps by the high-pressure air, the rack of the fuel injection pump is pulled to a fuel cut-off position, a fuel supply system is cut off, and therefore the diesel engine is forced to stop working, when a certain fuel injection pump is clamped due to abnormal reasons, the rack clamped by the fuel injection pump cannot be pulled by the huge impact force of high-pressure air, and therefore part of the fuel injection pump is still in a fuel supply state, and therefore defects exist in the using process.
SUMMERY OF THE UTILITY MODEL
The technical problems solved by the utility model are as follows: the utility model provides a parking equipment of marine diesel engine, through optimizing the structure of high-pressure oil pump, set up in the high-pressure oil pump with the air cavity of compressed air bottle by the outlet duct intercommunication that is equipped with the solenoid valve, realize separating the gyro wheel and the cam of high-pressure oil pump after the switch-on of solenoid valve control compressed air, thereby the problem of parking at the unable normal during operation diesel engine of speed regulator and supplementary parking equipment has been solved, satisfy different model high-pressure oil pump designing requirement and diesel engine parking requirement, realize the reliable parking function of diesel engine, the diesel engine operation safety has been ensured, provide the design basis for follow-up novel diesel engine development and development.
The technical scheme adopted by the utility model is as follows: the parking device of the marine diesel engine comprises a compressed air bottle, an electromagnetic valve and an air outlet pipe, wherein the air outlet pipe is provided with the electromagnetic valve used for controlling the on-off of compressed air in the pipe, an air outlet of the compressed air bottle is communicated with one end of the air outlet pipe, the other end of the air outlet pipe is communicated with air inlets on a plurality of high-pressure oil pumps, an air cavity communicated with the air inlets is arranged in the high-pressure oil pumps, compressed air in the compressed air bottle enters the air cavity through the air outlet pipe by controlling the electromagnetic valve, and then a plunger in the high-pressure oil pumps is jacked up, so that the rollers of the high-pressure oil pumps are separated from a cam.
The tappet in the high-pressure oil pump is of a T-shaped sleeve structure, an inner hole of a tappet guide sleeve in the high-pressure oil pump is a stepped hole with a large upper end and a small lower end, the upper end of the tappet is fixedly connected with the lower end of a plunger, the tappet is matched in the stepped hole of the tappet guide sleeve in a sealing mode, an air cavity is formed by the area from the bottom surface of a step on the outer circumferential wall of the tappet to the step surface of the stepped hole of the tappet guide sleeve, an air inlet is formed in the outer wall of the tappet guide sleeve and communicated with one end of an air hole formed in the tappet guide sleeve, the other end of the air hole is communicated with the air cavity, and compressed air introduced into the air cavity pushes the tappet and the plunger to move upwards so that a roller at the lower end of the tappet is separated from a cam.
Furthermore, sealing rings are arranged on the outer circumferential walls of the upper end and the lower end of the tappet, and the tappet guide sleeve and the tappet are sealed through two sealing rings which are in contact with the wall of the tappet guide sleeve and are respectively positioned above and below the air cavity.
Further, the electromagnetic valve is a three-position two-way electromagnetic valve.
Compared with the prior art, the utility model has the advantages that:
1. according to the technical scheme, by optimizing the structure of the high-pressure oil pump, an air cavity communicated with a compressed air bottle through an air outlet pipe provided with an electromagnetic valve is arranged in the high-pressure oil pump, and the electromagnetic valve controls the connection of compressed air to separate a roller of the high-pressure oil pump from a cam, so that the problem of stopping a diesel engine when a speed regulator and an auxiliary stopping device cannot normally work is solved, and the design requirements of the high-pressure oil pumps of different types and the stopping requirements of the diesel engine are met;
2. according to the technical scheme, the tappet and the tappet guide sleeve are improved, an air cavity communicated with an air inlet through an air hole is formed in the area from the bottom surface of the step on the outer circumferential wall of the tappet to the step surface of the step hole of the tappet guide sleeve, and a foundation is provided for pushing the tappet and the plunger to move upwards by compressed air, so that the diesel engine parking function after the roller and the cam are separated when the speed regulator and the auxiliary parking device cannot work normally is realized, and the safety and reliability of the diesel engine operation are improved;
3. the technical scheme has the advantages of simple structure and novel design, realizes the reliable parking function of the diesel engine, ensures the operation safety of the diesel engine, provides a design basis for the development and the development of a follow-up novel diesel engine, and has wider application field and better popularization value.
Drawings
FIG. 1 is a schematic view of an improved internal structure of a high-pressure oil pump according to the present invention;
FIG. 2 is a schematic diagram of the roller and cam separated state of the improved high-pressure oil pump of the present invention;
fig. 3 is a schematic diagram of a high pressure oil pump control system of the present invention.
Detailed Description
In the following, an embodiment of the present invention will be described in conjunction with fig. 1 to 3, so as to clearly and completely describe the technical solution, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
A parking device of a marine diesel engine, as shown in fig. 1-3, comprising a compressed air bottle 1, an electromagnetic valve 2 and an air outlet pipe 3, wherein the air outlet pipe 3 is provided with the electromagnetic valve 2 for controlling the on-off of compressed air in the pipe, the electromagnetic valve 2 is a three-position two-way electromagnetic valve, an air outlet of the compressed air bottle 1 is communicated with one end of the air outlet pipe 3, the other end of the air outlet pipe 3 is communicated with air inlets 4-1 of a plurality of high-pressure oil pumps 4, air chambers 4-2 communicated with the air inlets 4-1 are arranged in the high-pressure oil pumps 4, and the compressed air in the compressed air bottle 1 enters the air chambers 4-2 through the air outlet pipe 3 by controlling the electromagnetic valve 2 to jack up plungers 4-3 in the high-pressure oil pumps 4, so as to separate rollers 4-4 of the high-pressure oil pumps 4 from cams 5; in the structure, by optimizing the structure of the high-pressure oil pump 4, an air cavity 4-2 communicated with the compressed air bottle 1 through an air outlet pipe 3 provided with an electromagnetic valve 2 is arranged in the high-pressure oil pump 4, and the electromagnetic valve 2 controls the communication of compressed air to separate a roller 4-4 of the high-pressure oil pump 4 from a cam 5, so that the problem of stopping a diesel engine when a speed regulator and an auxiliary stopping device cannot work normally is solved, and the design requirements of high-pressure oil pumps of different types and the stopping requirements of the diesel engine are met;
the specific structure of the compressed air driving the plunger 4-3 to move upwards is as follows: the tappet 4-5 in the high-pressure oil pump 4 is of a T-shaped sleeve structure, an inner hole of a tappet guide sleeve 4-6 in the high-pressure oil pump 4 is a stepped hole with a large upper part and a small lower part, the upper end of the tappet 4-5 is fixedly connected with the lower end of a plunger 4-3, the tappet 4-5 is hermetically matched in the stepped hole of the tappet guide sleeve 4-6, the air cavity 4-2 is formed by the area from the bottom surface of a step on the outer circumferential wall of the tappet 4-5 to the step surface of the stepped hole of the tappet guide sleeve 4-6, the outer wall of the tappet guide sleeve 4-6 is provided with an air inlet 4-1, the air inlet 4-1 is communicated with one end of an air hole 4-7 arranged on the tappet guide sleeve 4-6, the other end of the air cavity 4-7 is communicated with the air cavity 4-2, and compressed air introduced into the air cavity 4-2 pushes the tappet 4-5 and the plunger 4-3 to move upwards so that the tappet 4-5 moves downwards The end roller 4-4 is separated from the cam 5; specifically, the sealing structure of the tappet 4-5 in the tappet guide sleeve 4-6 is as follows: sealing rings 4-8 are arranged on the outer circumferential walls of the upper end and the lower end of the tappet 4-5, and the tappet guide sleeve 4-6 and the tappet 4-5 are sealed by two sealing rings 4-8 which are in contact with the wall of the tappet guide sleeve 4-6 and are respectively positioned above and below the air cavity 4-2; in the structure, the air cavity 4-2 communicated with the air inlet 4-1 through the air hole 4-7 is formed from the area between the bottom surface of the step on the outer circumferential wall of the tappet 4-5 and the step surface of the stepped hole of the tappet guide sleeve 4-6 by improving the tappet 4-5 and the tappet guide sleeve 4-6, so that a foundation is provided for pushing the tappet 4-5 and the plunger 4-3 to move upwards by compressed air, the diesel engine parking function after the roller 4-4 and the cam 5 are separated when the speed regulator and the auxiliary parking device cannot work normally is realized, and the safety and reliability of the diesel engine operation are improved;
when the diesel engine which cannot normally work by the speed regulator and the auxiliary parking device needs to be parked, the electromagnetic valve 2 is given an opening signal, compressed air enters an air cavity 4-2 formed by a tappet 4-5 and a tappet guide sleeve 4-6 in the high-pressure oil pump 4, the tappet 4-5 of the high-pressure oil pump 4 is jacked up, the roller 4-4 is separated from the cam 5, the high-pressure oil pump 4 stops injecting oil into the combustion chamber, and the diesel engine stops running.
The technical scheme has the advantages of simple structure and novel design, realizes the reliable parking function of the diesel engine, ensures the operation safety of the diesel engine, provides a design basis for the development and the development of a follow-up novel diesel engine, and has wider application field and better popularization value.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (4)
1. The stop device of marine diesel engine, its characterized in that: the high-pressure oil pump device is characterized by comprising a compressed air bottle (1), an electromagnetic valve (2) and an air outlet pipe (3), wherein the air outlet pipe (3) is provided with the electromagnetic valve (2) used for controlling the on-off of compressed air in the pipe, the air outlet of the compressed air bottle (1) is communicated with one end of the air outlet pipe (3), the other end of the air outlet pipe (3) is communicated with air inlets (4-1) on a plurality of high-pressure oil pumps (4), air cavities (4-2) communicated with the air inlets (4-1) are arranged in the high-pressure oil pumps (4), and the compressed air in the compressed air bottle (1) enters the air cavities (4-2) through the air outlet pipe (3) by controlling the electromagnetic valve (2) to jack up plungers (4-3) in the high-pressure oil pumps (4), so that the rollers (4-4) of the high-pressure oil pumps (4) are separated from cams (5).
2. The stopping device for a marine diesel engine according to claim 1, characterized in that: the tappet (4-5) in the high-pressure oil pump (4) is of a T-shaped sleeve structure, the inner hole of a tappet guide sleeve (4-6) in the high-pressure oil pump (4) is a stepped hole with a large upper part and a small lower part, the upper end of the tappet (4-5) is fixedly connected with the lower end of a plunger (4-3), the tappet (4-5) is hermetically matched in the stepped hole of the tappet guide sleeve (4-6), the air cavity (4-2) is formed by an area from the bottom surface of a step on the outer circumferential wall of the tappet (4-5) to the stepped surface of the stepped hole of the tappet guide sleeve (4-6), the outer wall of the tappet guide sleeve (4-6) is provided with an air inlet (4-1), the air inlet (4-1) is communicated with one end of an air hole (4-7) arranged on the tappet guide sleeve (4-6), the other end of the air hole (4-7) is communicated with the air cavity (4-2), compressed air introduced into the air cavity (4-2) pushes the tappet (4-5) and the plunger (4-3) to move upwards, so that the roller (4-4) at the lower end of the tappet (4-5) is separated from the cam (5).
3. The stopping device for a marine diesel engine according to claim 2, characterized in that: sealing rings (4-8) are arranged on the outer circumferential walls of the upper end and the lower end of the tappet (4-5), and the tappet guide sleeve (4-6) and the tappet (4-5) are sealed through two sealing rings (4-8) which are in contact with the hole wall of the tappet guide sleeve (4-6) and are respectively positioned above and below the air cavity (4-2).
4. The stopping device for the marine diesel engine according to any one of claims 1 to 3, characterized in that: the electromagnetic valve (2) is a three-position two-way electromagnetic valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122270706.8U CN215907957U (en) | 2021-09-18 | 2021-09-18 | Stop device of marine diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122270706.8U CN215907957U (en) | 2021-09-18 | 2021-09-18 | Stop device of marine diesel engine |
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| Publication Number | Publication Date |
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| CN215907957U true CN215907957U (en) | 2022-02-25 |
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| CN202122270706.8U Active CN215907957U (en) | 2021-09-18 | 2021-09-18 | Stop device of marine diesel engine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962013A (en) * | 2022-06-02 | 2022-08-30 | 陕西柴油机重工有限公司 | Overspeed parking redundancy system for diesel engine |
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2021
- 2021-09-18 CN CN202122270706.8U patent/CN215907957U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114962013A (en) * | 2022-06-02 | 2022-08-30 | 陕西柴油机重工有限公司 | Overspeed parking redundancy system for diesel engine |
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