CN217586312U - Slow-speed barring self-detection system used before starting of diesel engine - Google Patents
Slow-speed barring self-detection system used before starting of diesel engine Download PDFInfo
- Publication number
- CN217586312U CN217586312U CN202121531512.2U CN202121531512U CN217586312U CN 217586312 U CN217586312 U CN 217586312U CN 202121531512 U CN202121531512 U CN 202121531512U CN 217586312 U CN217586312 U CN 217586312U
- Authority
- CN
- China
- Prior art keywords
- slow
- valve
- diesel engine
- barring
- starting
- 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.)
- Active
Links
Images
Landscapes
- Testing Of Engines (AREA)
Abstract
The utility model provides a slow barring self test system before diesel engine starts, including diesel engine owner's starting line, diesel engine owner's starting line includes the stop valve, filter and main starting valve, the stop valve export is connected with the filter import, the filter export is connected with main starting valve air inlet, main starting valve gas outlet passes through the grease squirt and is connected with the air distributor who is used for opening each jar of diesel engine, main starting valve both ends parallel connection has the slow barring pipeline of the same kind all the way, when the diesel engine starts, the start air makes diesel engine crank coupling mechanism operation and realizes slow barring through slow barring pipeline at first, diesel engine monitoring system passes through speed sensor monitoring slow barring rotational speed value and judges whether diesel engine operating condition is good according to this rotational speed value. The system improves the automation degree of the diesel engine, and simultaneously avoids the problems of complex operation, large misoperation risk, non-universality of no-load and on-load jiggers and the like of the external jigger.
Description
Technical Field
The utility model belongs to the technical field of the diesel engine, concretely relates to a slow speed barring self-detecting system for before diesel engine starts.
Background
Before the diesel engine is started, whether the phenomena of friction, collision and clamping stagnation exist in the diesel engine needs to be checked so as to ensure the running safety after the diesel engine is started. Usually, this detection process is realized by the investment and cutting-out of a turning gear externally hung on the diesel engine. The quality of installation and maintenance of the diesel engine is judged by comparing the running state of the turning mechanism when turning the diesel engine each time, such as the centering quality of a coupling, the size of a bearing bush gap, the retention of oil mist foreign matters in the diesel engine body and the like. The externally-hung barring gear output shaft gear is meshed or separated with a host barring gear through a handle, when the gear is located at a meshing position, the handle is in contact with a limit switch to enable a diesel engine to start interlocking, and an output shaft of the barring gear is driven by an electric motor through a belt or a reduction gear to drive the diesel engine barring gear to drive a crankshaft to rotate so as to detect the diesel engine.
The external barring gear is used for detecting the diesel engine before starting, and the following problems generally exist:
1. before the barring, the indicator valve needs to be opened, the handle is moved to the barring position, and meanwhile, the starting interlock is ensured to be normal; after turning over, the indicator valve needs to be closed, and the handle is moved to the starting position, so that the operation is complicated;
2. when the starting interlocking function of the limit switch of the barring gear breaks down, the diesel engine can be started under the condition that the barring gear is meshed, so that casualties and equipment damage are caused;
3. the output torque of the barring machine is limited by the power of a motor, and when a belt-carrying barring machine needs to be arranged, the barring mechanism needs to be additionally configured.
In order to solve the problems of the existing external jigger structure, improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem: the utility model provides a slow barring is from detecting system for diesel engine before starting, the utility model discloses a carry out optimal design to start air gas circuit and control system, realize the slow barring before the diesel engine starts to through the detection to the barring rotational speed, judge whether the diesel engine state is good, realize the self-checking before the diesel engine starts, improve the diesel engine degree of automation, avoided external barring complex operation simultaneously, the maloperation risk is big, unloaded and the not general scheduling problem of area year barring.
The utility model adopts the technical proposal that: a slow barring self-detecting system for before diesel engine starts, including diesel engine owner starting line, diesel engine owner starting line includes stop valve, filter and main starting valve, the stop valve export is connected with the filter access, the filter export is connected with main starting valve air inlet, main starting valve gas outlet is connected with the air distributor who is used for opening each jar of diesel engine through the grease squirt, main starting valve air inlet is connected with the relief pressure valve, the fuel trip valve on the fuel supply line is connected to the relief pressure valve, the relief pressure valve is connected and is started the solenoid valve, start the solenoid valve and be connected with the start button on main starting valve and the fuel trip valve respectively, main starting valve both ends parallel connection has a slow barring pipeline of the same kind, and when the diesel engine starts, start the air at first makes diesel engine crank coupling mechanism operation and realize slow barring through slow barring pipeline, and diesel engine monitoring system monitors slow barring rotational speed value through the sensor and judges whether diesel engine operating condition is good according to this rotational speed value.
The technical scheme is further limited, the slow barring pipeline comprises a slow pressure reducing valve and a slow control valve, the slow pressure reducing valve and the slow control valve are connected in series and then connected in parallel with the main starting valve, an air inlet of the slow pressure reducing valve is connected with an air inlet of the main starting valve, an air outlet of the slow pressure reducing valve is connected with an air inlet of the slow control valve, and an air outlet of the slow control valve is connected with an air outlet of the main starting valve.
In a further limitation of the above technical solution, the slow control valve is controlled by a pneumatic button of the console.
Compared with the prior art, the utility model advantage:
1. according to the scheme, the starting air circuit and the control system are optimally designed, slow barring before the diesel engine is started is realized, low-pressure air is controlled through the slow control valve to carry out slow barring, the barring state is automatically detected by the diesel engine monitoring system, whether the state of the diesel engine is good or not is judged and is treated, self detection before the diesel engine is started is realized, the automation degree of the diesel engine is improved, and the problems that the operation of external barring is complicated, the misoperation risk is large, no-load barring and on-load barring are not universal and the like are avoided;
2. the scheme is characterized in that a slow pressure reducing valve is arranged in a slow barring pipeline, and the slow barring pressure is adjusted through the slow pressure reducing valve, so that the rapid switching of the diesel engine in the no-load and on-load barring modes is realized.
Drawings
Fig. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the verb "to comprise a" does not exclude the presence of other, identical elements in a process, method, article or apparatus that comprises a stated element.
Please refer to fig. 1, which illustrates an embodiment of the present invention.
The slow-speed barring self-detection system used before the diesel engine is started comprises a diesel engine main starting pipeline, as shown in figure 1, the diesel engine main starting pipeline comprises a stop valve 1, a filter 2 and a main starting valve 3, an outlet of the stop valve 1 is connected with an inlet of the filter 2, an outlet of the filter 2 is connected with an air inlet of the main starting valve 3, and an air outlet of the main starting valve 3 is connected with an air distributor used for opening each cylinder of the diesel engine through an oil injector 16; the air inlet of the main starting valve 3 is connected with a pressure reducing valve 4, the pressure reducing valve 4 is connected with a fuel cut-off valve 6 on a fuel supply pipeline 11, the pressure reducing valve 4 is connected with a starting electromagnetic valve 5, and the starting electromagnetic valve 5 is respectively connected with a starting button on the main starting valve 3 and the fuel cut-off valve 6; the outlet of the pressure reducing valve 4 is further connected with a parking valve I7 and a parking valve II 8, the parking valve I7 is connected with the parking valve II 8 in parallel, one end of the parking valve I7 and one end of the parking valve II 8 are connected with a sliding valve I9, the sliding valve I9 is connected with a sliding valve II 10, and the sliding valve II 10 is connected with a pneumatic parking cylinder 12.
The two ends of the main starting valve 3 are connected with a slow barring pipeline 13 in parallel, when the diesel engine is started, starting air firstly enables the crank connecting mechanism of the diesel engine to run through the slow barring pipeline 13 to achieve slow barring, and the diesel engine monitoring system monitors the rotating speed value of the slow barring through the speed measuring sensor and judges whether the working state of the diesel engine is good or not according to the rotating speed value.
Specifically, the slow barring pipeline 13 comprises a slow pressure reducing valve 14 and a slow control valve 15, the slow pressure reducing valve 14 and the slow control valve 15 are connected in series and then connected in parallel with the main starting valve 3, an air inlet of the slow pressure reducing valve 14 is connected with an air inlet of the main starting valve 3, an air outlet of the slow pressure reducing valve 14 is connected with an air inlet of the slow control valve 15, and an air outlet of the slow control valve 15 is connected with an air outlet of the main starting valve 3. The slow control valve 15 is controlled by a console pneumatic button.
The working principle is as follows: when the diesel engine is started, the slow control valve 15 is opened firstly, starting air is decompressed by the slow decompression valve 14 and then enters the starting air pipeline, one path of the starting air enters a starting air valve at a starting air inlet of a cylinder cover of the diesel engine, and the other path of the starting air valve sequentially opens the starting air valves of all cylinders through an air distributor, so that compressed air at air inlets of air holes of the cylinder cover enters all the cylinders, the crank connecting rod mechanism is pushed to move, and slow barring is achieved. The slow turning condition is typically 3 to 4 revolutions of the diesel engine crankshaft in 1 minute. The diesel engine monitoring system detects the rotating speed value of the slow turning gear by using a speed measuring sensor, compares the rotating speed value with a set value, and when the rotating speed setting requirement is met, the working state of parts of the diesel engine is good, the monitoring system automatically sends a starting instruction, opens a starting electromagnetic valve 5, controls air through 7bar reduced by a reducing valve 4, opens a main starting valve 3, enables the starting air to enter a cylinder, opens a fuel supply pipeline 11, enables fuel to enter the engine, and enables a fuel rack to reach a starting position by starting a limiting piston, so that the diesel engine is normally started. And when the turning speed is not in the set range of 3-4 revolutions, the monitoring system outputs a diesel engine fault signal.
Turning gear air pressure design: the slow barring is to use air pressure to push a piston to do work to overcome friction resistance between a moving pair of the diesel engine, transmission resistance of accessory equipment, pumping resistance and the like, and when the diesel engine is designed, the barring torque T (unit N.m) can be calculated and determined according to resistance conditions. For a slow turning speed of n (r/min) for a diesel engine, the power P (kW) provided by the air pressure can be determined by equation (1)
T =9550P/n (formula 1)
The power P provided by the air pressure is determined by the force F acting on the piston of the diesel engine and the average moving speed V of the piston
P = F V (formula 2)
Wherein the force F on the piston can be determined by
F = p (π D ^ 2)/4 (formula 3)
Wherein p (unit MPa) is the slow barring gas pressure to be determined, and D (unit dm) is the diameter of the cylinder;
the average piston velocity V can be determined by
V =2n S/60 (formula 4)
Wherein S (unit dm) is the stroke of the diesel engine
Substituting formula 3, formula 4 into formula 2 to obtain formula 5
P = P Vs n/30 (formula 5)
Wherein Vs is the scavenging volume (L) with a value of (pi D2) S/4
The gas pressure required for slow turning of the diesel engine can be determined by the following formula
p =30T/9550Vs (formula 6)
When the diesel engine is started, the piston is pushed by lower starting pressure to carry out slow barring, the barring speed is detected, and when the barring speed is in a normal range, a monitoring system automatically sends out a starting instruction, so that the diesel engine is started; when the turning speed is abnormal, the monitoring system automatically sends out a fault signal to prompt the diesel engine to inspect; the system improves the automation degree of the diesel engine, and simultaneously avoids the problems of complex operation, large misoperation risk, no-load and on-load jiggering, non-universality and the like of the external jiggering.
It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 (3)
1. A slow speed barring is from detecting system for diesel engine before starting, including diesel engine owner starting pipeline, diesel engine owner starting pipeline includes stop valve (1), filter (2) and main starting valve (3), stop valve (1) export and filter (2) access connection, filter (2) export and main starting valve (3) air inlet are connected, main starting valve (3) gas outlet is connected with the air distributor who is used for opening each jar of diesel engine through grease squirt (16), relief pressure valve (4) are connected to main starting valve (3) air inlet, fuel cut-off valve (6) on fuel supply pipeline (11) are connected in relief pressure valve (4), starting solenoid valve (5) are connected with the start button on main starting valve (3) and fuel cut-off valve (6) respectively, its characterized in that: two ends of the main starting valve (3) are connected with one path of slow barring pipeline (13) in parallel, when the diesel engine is started, starting air firstly enables the diesel engine crank connecting mechanism to operate through the slow barring pipeline (13) to achieve slow barring, and the diesel engine monitoring system monitors a slow barring rotating speed value through a speed measuring sensor and judges whether the working state of the diesel engine is good or not according to the rotating speed value.
2. The self-detection system for slow barring before diesel engine startup of claim 1 wherein: the slow-speed jigger pipeline (13) comprises a slow-speed reducing valve (14) and a slow-speed control valve (15), the slow-speed reducing valve (14) and the slow-speed control valve (15) are connected in series and then are connected with the main starting valve (3) in parallel, an air inlet of the slow-speed reducing valve (14) is connected with an air inlet of the main starting valve (3), an air outlet of the slow-speed reducing valve (14) is connected with an air inlet of the slow-speed control valve (15), and an air outlet of the slow-speed control valve (15) is connected with an air outlet of the main starting valve (3).
3. The self-detection system for slow barring before diesel engine startup of claim 2 wherein: the slow control valve (15) is controlled by a pneumatic button of the control console.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121531512.2U CN217586312U (en) | 2021-07-07 | 2021-07-07 | Slow-speed barring self-detection system used before starting of diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121531512.2U CN217586312U (en) | 2021-07-07 | 2021-07-07 | Slow-speed barring self-detection system used before starting of diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217586312U true CN217586312U (en) | 2022-10-14 |
Family
ID=83526232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121531512.2U Active CN217586312U (en) | 2021-07-07 | 2021-07-07 | Slow-speed barring self-detection system used before starting of diesel engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217586312U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006335A (en) * | 2023-02-27 | 2023-04-25 | 陕西柴油机重工有限公司 | Diesel engine car blowing system based on compressed air jigger |
-
2021
- 2021-07-07 CN CN202121531512.2U patent/CN217586312U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116006335A (en) * | 2023-02-27 | 2023-04-25 | 陕西柴油机重工有限公司 | Diesel engine car blowing system based on compressed air jigger |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN217586312U (en) | Slow-speed barring self-detection system used before starting of diesel engine | |
| US9316197B2 (en) | Method for starting an internal combustion engine | |
| CN214146110U (en) | Engineering machinery hydraulic oil on-line monitoring and filtering system | |
| CN112555139B (en) | Control device of vehicle air compressor system | |
| CN106017938A (en) | Engine test bench | |
| CN200960928Y (en) | Automatic controller for industrial and mineral diesel locomotive | |
| CN213540600U (en) | Electric control type starting device of marine diesel engine | |
| CN115182801B (en) | Fault processing method and system for lubricating system of engine | |
| CN210624125U (en) | High-speed motor oil mist lubricating device | |
| CN102777273A (en) | Intelligent comprehensive monitoring and controlling system for moving components of diesel generator set | |
| CN206092580U (en) | Hydraulic actuator pollution detection and processing apparatus | |
| CN106014944B (en) | A kind of oil-free compressor control method and its equipment | |
| CN109780313B (en) | Automatic control system for indicator valve of multi-cylinder diesel engine for ship | |
| CN210317411U (en) | Intelligent debugging system for jacking oil | |
| CN2651446Y (en) | Non-pressure hydraulic fuel oil rapid blocking apparatus | |
| CN218151170U (en) | Emergency stop device and diesel engine thereof | |
| CN112696281A (en) | Control method, device and system for automatic slow turning of large diesel engine | |
| CN208734519U (en) | A kind of high-pressure pump intelligence control system based on PLC | |
| CN107478531B (en) | High-speed high-pressure friction and wear experiment platform and electrohydraulic control system thereof | |
| CN206234096U (en) | A kind of air compressor machine of full-automatic unmanned supervision | |
| CN2779373Y (en) | Detection tool for static fault of low engine oil pressure | |
| CN101469620A (en) | Protecting method for diesel pressure booster | |
| CN2398151Y (en) | Testing device for hydraulic components and parts of vehicle | |
| CN219139372U (en) | New energy electric sliding vane air compressor air supply system | |
| CN2634149Y (en) | High speed pump automatic startor for propylene raw material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |