CN110319959B - Starting resistance moment measuring device for large-torque diesel engine - Google Patents
Starting resistance moment measuring device for large-torque diesel engine Download PDFInfo
- Publication number
- CN110319959B CN110319959B CN201910622464.9A CN201910622464A CN110319959B CN 110319959 B CN110319959 B CN 110319959B CN 201910622464 A CN201910622464 A CN 201910622464A CN 110319959 B CN110319959 B CN 110319959B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 42
- 230000008878 coupling Effects 0.000 claims abstract description 42
- 238000010168 coupling process Methods 0.000 claims abstract description 42
- 238000005859 coupling reaction Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000010687 lubricating oil Substances 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000013178 mathematical model Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Testing Of Engines (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention belongs to the technical field of diesel engine manufacturing, and provides a starting resistance moment measuring device of a high-torque diesel engine. The proposed starting resistance moment measuring device of the large-torque diesel engine is provided with a driving gear which is meshed with a flywheel gear ring of the diesel engine; one side of the driving gear is connected with a gear transmission shaft coaxially arranged with the driving gear; the gear transmission shaft is connected with the torque and rotation speed measuring instrument through a coupling I; the coupling I and the torque and rotation speed measuring instrument and the coupling I and the gear transmission shaft are respectively and elastically connected into a whole through an elastic connecting piece I; a bearing shell assembly is sleeved on the gear transmission shaft; the torque and rotation speed measuring instrument is connected to an output shaft I of the driving motor through a coupling II; the coupling II and the torque and rotation speed measuring instrument and the coupling II and the output shaft I are respectively and elastically connected into a whole through an elastic connecting piece II. The invention effectively improves the reliability of the measuring device.
Description
Technical Field
The invention belongs to the technical field of diesel engine manufacturing, and particularly relates to a starting resistance moment measuring device of a high-torque diesel engine.
Background
The starting performance is an important index for measuring the performance quality of the diesel engine; whether a starter motor or other starting method is used, the resistance distance from the interior of the engine must first be overcome; therefore, the starting equipment can be better matched only by accurately obtaining the starting resistance moment of the diesel engine; the starting resistance moment mainly comes from the friction resistance inside the diesel engine, and the friction resistance is mainly influenced by factors such as the viscosity of lubricating oil between piston rings, the friction force between piston rings and cylinder liners, the friction force between piston skirt parts and the cylinder liners, the friction of a gas distribution system, the friction of a cooling water pump and a lubricating oil pump, the friction of a bearing and the like; the influence factors of the starting resistance moment are complex and cannot be accurately obtained through a calculation method, and at present, the starting resistance moment is mainly measured by the following three methods in the industry:
1. an electric dynamometer with a dragging function is adopted.
2. And based on the acquired data of the starting motor, establishing a starting resistance moment mathematical model for calculation.
3. The starting resistance test system consists of variable frequency motor, variable speed gear, torque tachometer, data acquisition system and other equipment and instruments.
For high power diesel engines, it is difficult to find an electrical dynamometer with sufficient power. The method is based on the collected data of the starting motor, and a mathematical model of the starting resistance moment is established, so that a known patent, such as the patent 'engine starting resistance moment test method' with the application number of 201010049575.4, adopts the method, but the method of approximate calculation hardly truly reflects the resistance moment state of the engine, and is based on the collected data of the starting motor, and if the starting motor is not selected for the newly developed engine, the test method is not feasible.
Therefore, a starting resistance testing system consisting of a variable frequency motor, a variable speed gear, a torque tachometer, a data acquisition system and other equipment and instruments is an ideal choice, and no relevant patent is available at present on the aspect of the resistance moment testing of the diesel engine based on the testing method.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a starting resistance moment measuring device of a high-torque diesel engine.
The invention adopts the following technical scheme for accomplishing the purposes of the invention:
a high torque diesel engine starting resistance moment measuring device is provided with a driving gear engaged with a flywheel gear ring of a diesel engine; one side of the driving gear is connected with a gear transmission shaft coaxially arranged with the driving gear; the gear transmission shaft is a stepped shaft, a shaft with a larger diameter section of the stepped shaft is fixedly connected with the driving gear, and a shaft with a smaller diameter section is connected with the torque rotation speed measuring instrument through a coupling I; the coupling I and the torque and rotation speed measuring instrument and the coupling I and the gear transmission shaft are respectively and elastically connected into a whole through an elastic connecting piece I; a bearing shell assembly is sleeved on the shaft with the larger diameter section of the gear transmission shaft; the bearing shell assembly is provided with a bearing shell, and the bearing shell is a hollow cylinder with a plane bottom surface; the center through hole of the bearing shell is provided with a through hole I positioned in the middle, through holes II positioned at two ends of the through hole I and having a diameter larger than that of the through hole I, and through holes III positioned at the outer sides of the two through holes II and communicated with the corresponding through holes II; the diameter of the through hole III is larger than that of the through hole II; a bearing bushing in interference fit with the through hole I is arranged in the bearing shell; the bearing bushes are symmetrically arranged at two ends of the through hole I; the inner ring of the bearing bush is in clearance fit with the gear transmission shaft; the through hole III is internally provided with a shaft sealing ring with an outer ring in interference fit with the inner wall surface of the through hole III, and an inner hole of the shaft sealing ring is in interference fit with the gear transmission shaft; the torque and rotation speed measuring instrument is connected to an output shaft I of the driving motor through a coupling II; the shaft coupling II and the torque and rotation speed measuring instrument and the shaft coupling II and the output shaft I are respectively and elastically connected into a whole through an elastic connecting piece II; the bearing shell is supported on the bearing shell bracket; the driving motor is arranged on the driving motor bracket; the bearing shell is coaxially arranged with the driving motor; the driving motor drives the torque rotation speed measuring instrument, the gear transmission shaft and the driving gear to rotate through the coupling I and the coupling II, and the driving gear drags the flywheel gear ring with a certain transmission ratio to drive the diesel engine to run until the diesel engine reaches the ignition rotation speed, so that the diesel engine is started; in the process from the start of the operation of the diesel engine to the realization of the starting, the torque and rotation speed measuring instrument senses the torque and rotation speed signals transmitted by the torque and rotation speed measuring instrument, and the controller and the signal collector take the speed ratio relation between the driving gear and the flywheel gear ring and the friction loss from the torque and rotation speed measuring instrument to the flywheel gear ring intermediate device into consideration, so that the relation curve of the rotation speed of the diesel engine and the starting resistance moment is truly output, and the starting resistance moment measurement of the diesel engine is completed.
A counter bore which is in clearance fit with the gear transmission shaft is formed in the end face of the connection between the driving gear and the gear transmission shaft; the end face of the driving gear is provided with a plurality of through holes uniformly distributed along the axis of the gear; the gear transmission shafts are provided with threaded holes which are in one-to-one correspondence with the through holes on the driving gears; one end of the gear transmission shaft positioned in the counter bore of the driving gear is connected with the driving gear into a whole through an inner hexagon screw;
the upper part of the bearing shell is distributed with a plurality of radial stepped holes, the upper part of each radial stepped hole is a threaded hole, and the lower part of each radial stepped hole is a unthreaded hole; wherein two radial stepped holes at two ends are communicated with the through hole II; the rest radial stepped holes are communicated with the through hole I; the radial stepped hole is arranged in order to screw one end of the hose into the radial stepped hole through a threaded pipe, and the other end of the hose is introduced into an oil supply device to introduce lubricating oil to lubricate the bearing bush.
The torque and rotation speed measuring instrument is used for measuring the rotation speed of a shafting and transmitting torque and is provided with an output shaft II and an output shaft III; the output shaft II and the output shaft III are correspondingly arranged at the left side and the right side of the torque rotation speed measuring instrument; the torque and rotation speed measuring instrument is connected with the coupling II through the output shaft II; the torque rotation speed measuring instrument is connected with the coupling I through an output shaft III.
According to the high-torque diesel engine starting resistance moment measuring device provided by the invention, the driving gear drives the flywheel gear ring to operate at a certain speed ratio, the required torque is greatly reduced compared with an electric dynamometer, and the reliability of the driving motor and the driving device is easier to guarantee; in the working process of the driving motor, the transmission torque is continuously changed, and meanwhile, coaxiality errors exist between the gear transmission shaft and the output shaft of the driving motor, and all factors can cause the measuring device to generate periodical torsional deformation, so that the reliability of the measuring device can be reduced; in the device for measuring the starting resistance moment of the large-torque diesel engine, a plurality of elastic connecting pieces are respectively arranged on a coupling II between a torque rotating speed measuring instrument and a driving motor and a coupling I between the torque rotating speed measuring instrument and a driving gear; the elastic connecting sheet can absorb torsional deformation, so that the reliability of the measuring device is effectively improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of the assembly of a drive gear and bearing housing according to the present invention;
FIG. 3 is a schematic view of the structure of the coupling I according to the present invention;
FIG. 4 is a schematic view of the structure of a coupling II according to the present invention;
FIG. 5 is a schematic view of the fastening of joints I and II according to the present invention;
FIG. 6 is a schematic view of a driving motor stand according to the present invention
In the figure: 1. flywheel gear ring; 2. a drive gear; 3. a bearing housing bracket; 4. a driving motor bracket; 5. a driving motor; 6. a bearing housing; 7. a bearing bush; 8. a shaft seal ring; 9. an output shaft I; 10. a coupling II; 11. an elastic connecting piece II; 12. an output shaft II; 13. a torque rotation speed measuring instrument; 14. an output shaft III; 15. a shaft coupling I; 16. an elastic connecting piece I; 17. a gear drive shaft; 18. radial stepped hole I; 19 radial stepped holes II; 20. radial stepped bore III. 21. An inner hexagon screw; 22. locking screws.
Detailed Description
The invention will now be described with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, a starting resistance moment measuring device of a large torque diesel engine is provided with a driving gear 2 which is meshed with a flywheel gear ring 1 of a diesel engine; one side of the driving gear 2 is connected with a gear transmission shaft 17 coaxially arranged with the driving gear; referring to fig. 2, the gear transmission shaft 17 is a stepped shaft, a shaft with a larger diameter of the stepped shaft is fixedly connected with the driving gear 2, and a shaft with a smaller diameter is connected with the torque rotation speed measuring instrument 13 through a coupling i 15; a counter bore which is in clearance fit with the gear transmission shaft is formed in the end face of the connection between the driving gear and the gear transmission shaft; six through holes uniformly distributed along the axis of the gear are formed in the end face of the driving gear 2; the gear transmission shafts are provided with threaded holes which are in one-to-one correspondence with the through holes on the driving gears; one end of the gear transmission shaft positioned in the counter bore of the driving gear is connected with the driving gear into a whole through the inner hexagon screw 21;
referring to fig. 3, the coupling i 15 and the torque rotation speed measuring instrument 13, and the coupling i 15 and the gear transmission shaft 17 are respectively and elastically connected into a whole through an elastic connecting piece i 16; a bearing shell assembly is sleeved on the shaft with the larger diameter section of the gear transmission shaft 17; referring to fig. 2, the bearing housing assembly has a bearing housing 6, and the bearing housing 6 is a hollow cylinder with a plane bottom surface; the upper part of the bearing shell is distributed with a plurality of radial stepped holes, the upper part of each radial stepped hole is a threaded hole, and the lower part of each radial stepped hole is a unthreaded hole; wherein two radial stepped holes at two ends are communicated with the through hole II; the other radial stepped holes are communicated with the through hole I, and the purpose of the radial stepped holes is to screw one end of a hose into the radial stepped holes through a threaded pipe, and the other end of the hose is introduced into an oil supply device to introduce lubricating oil to lubricate a bearing bushing; the center through hole of the bearing shell 6 is provided with a through hole I positioned in the middle, through holes II positioned at two ends of the through hole I and having a diameter larger than that of the through hole I, and through holes III positioned at the outer sides of the two through holes II and communicated with the corresponding through holes II; the diameter of the through hole III is larger than that of the through hole II; a bearing bushing 7 in interference fit with the through hole I is arranged in the bearing shell; the bearing bushes 7 are symmetrically arranged at two ends of the through hole I; the inner ring of the bearing bush 7 is in clearance fit with the gear transmission shaft 17; a shaft sealing ring 8 with an outer ring in interference fit with the inner wall surface of the through hole III is arranged in the through hole III, and an inner hole of the shaft sealing ring 8 is in interference fit with a gear transmission shaft 17; the torque and rotation speed measuring instrument 13 is connected to an output shaft I9 of the driving motor 5 through a coupling II 10; FIG. 4 is assembled, the coupling II 10 and the torque rotation speed measuring instrument 13 and the coupling II 10 and the output shaft I9 are respectively and elastically connected into a whole through an elastic connecting piece II 11; the bearing shell support 6 is arranged on the bearing shell bracket 3; the driving motor 5 is arranged on the driving motor bracket 4; the bearing housing 6 is coaxially arranged with the driving motor 5; the driving motor 5 rotates through a coupling I10, a coupling II 15, a torque rotation speed measuring instrument 13, a gear transmission shaft 17 and a driving gear 2, the driving gear 2 drags the flywheel gear ring 1 with a certain transmission ratio to drive the diesel engine to run until the diesel engine reaches the ignition rotation speed, and the starting of the diesel engine is realized; in the process from the start of the operation of the diesel engine to the start, a torque and rotation speed measuring instrument 13 (manufacturer: KR-803-1000, model) senses the torque and rotation speed signals transmitted by the diesel engine, and a controller and a signal collector (manufacturer: KR-NA, model) take the speed ratio relation between a driving gear and a flywheel gear ring and the friction loss from the torque and rotation speed measuring instrument to a flywheel gear ring intermediate device into consideration, and truly outputs a relation curve of the rotation speed and the starting resistance moment of the diesel engine, thereby completing the measurement of the starting resistance moment of the diesel engine.
The torque and rotation speed measuring instrument is used for measuring the rotation speed of a shafting and transmitting torque and is provided with an output shaft II and an output shaft III; the output shaft II and the output shaft III are correspondingly arranged at the left side and the right side of the torque rotation speed measuring instrument; the torque and rotation speed measuring instrument is connected with the coupling II through the output shaft II; the torque rotation speed measuring instrument is connected with the coupling I through an output shaft III.
Claims (3)
1. The utility model provides a big moment of torsion diesel engine starts moment of resistance measuring device which characterized in that: the starting resistance moment measuring device is provided with a driving gear meshed with a flywheel gear ring of the diesel engine; one side of the driving gear is connected with a gear transmission shaft coaxially arranged with the driving gear; the gear transmission shaft is a stepped shaft, a shaft with a larger diameter section of the stepped shaft is fixedly connected with the driving gear, and a shaft with a smaller diameter section is connected with the torque rotation speed measuring instrument through a coupling I; the coupling I and the torque and rotation speed measuring instrument and the coupling I and the gear transmission shaft are respectively and elastically connected into a whole through an elastic connecting piece I; a bearing shell assembly is sleeved on the shaft with the larger diameter section of the gear transmission shaft; the bearing shell assembly is provided with a bearing shell, and the bearing shell is a hollow cylinder with a plane bottom surface; the center through hole of the bearing shell is provided with a through hole I positioned in the middle, through holes II positioned at two ends of the through hole I and having a diameter larger than that of the through hole I, and through holes III positioned at the outer sides of the two through holes II and communicated with the corresponding through holes II; the diameter of the through hole III is larger than that of the through hole II; a bearing bushing in interference fit with the through hole I is arranged in the bearing shell; the bearing bushes are symmetrically arranged at two ends of the through hole I; the inner ring of the bearing bush is in clearance fit with the gear transmission shaft; the through hole III is internally provided with a shaft sealing ring with an outer ring in interference fit with the inner wall surface of the through hole III, and an inner hole of the shaft sealing ring is in interference fit with the gear transmission shaft; the torque and rotation speed measuring instrument is connected to an output shaft I of the driving motor through a coupling II; the shaft coupling II and the torque and rotation speed measuring instrument and the shaft coupling II and the output shaft I are respectively and elastically connected into a whole through an elastic connecting piece II; the bearing shell is supported on the bearing shell bracket; the driving motor is arranged on the driving motor bracket; the bearing shell is coaxially arranged with the driving motor; the driving motor drives the torque rotation speed measuring instrument, the gear transmission shaft and the driving gear to rotate through the coupling I and the coupling II, and the driving gear drags the flywheel gear ring with a certain transmission ratio to drive the diesel engine to run until the diesel engine reaches the ignition rotation speed, so that the diesel engine is started; in the process from the start of the operation of the diesel engine to the realization of the starting, the torque and rotation speed measuring instrument senses the torque and rotation speed signals transmitted by the torque and rotation speed measuring instrument, and the controller and the signal collector take the speed ratio relation between the driving gear and the flywheel gear ring and the friction loss from the torque and rotation speed measuring instrument to the flywheel gear ring intermediate device into consideration, so as to truly output the relation curve of the rotation speed of the diesel engine and the starting resistance moment and finish the measurement of the starting resistance moment of the diesel engine; the torque and rotation speed measuring instrument is used for measuring the rotation speed of a shafting and transmitting torque and is provided with an output shaft II and an output shaft III; the output shaft II and the output shaft III are correspondingly arranged at the left side and the right side of the torque rotation speed measuring instrument; the torque and rotation speed measuring instrument is connected with the coupling II through the output shaft II; the torque rotation speed measuring instrument is connected with the coupling I through an output shaft III.
2. A high torque diesel engine starting resistance torque measuring device according to claim 1, wherein: a counter bore which is in clearance fit with the gear transmission shaft is formed in the end face of the connection between the driving gear and the gear transmission shaft; the end face of the driving gear is provided with a plurality of through holes uniformly distributed along the axis of the gear; the gear transmission shafts are provided with threaded holes which are in one-to-one correspondence with the through holes on the driving gears; one end of the gear transmission shaft is positioned in the counter bore of the driving gear and is connected with the driving gear into a whole through the socket head cap screw.
3. A high torque diesel engine starting resistance torque measuring device according to claim 1, wherein: the upper part of the bearing shell is distributed with a plurality of radial stepped holes, the upper part of each radial stepped hole is a threaded hole, and the lower part of each radial stepped hole is a unthreaded hole; wherein two radial stepped holes at two ends are communicated with the through hole II; the rest radial stepped holes are communicated with the through hole I; the radial stepped hole is arranged in order to screw one end of the hose into the radial stepped hole through a threaded pipe, and the other end of the hose is introduced into an oil supply device to introduce lubricating oil to lubricate the bearing bush.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622464.9A CN110319959B (en) | 2019-07-11 | 2019-07-11 | Starting resistance moment measuring device for large-torque diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622464.9A CN110319959B (en) | 2019-07-11 | 2019-07-11 | Starting resistance moment measuring device for large-torque diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110319959A CN110319959A (en) | 2019-10-11 |
| CN110319959B true CN110319959B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910622464.9A Active CN110319959B (en) | 2019-07-11 | 2019-07-11 | Starting resistance moment measuring device for large-torque diesel engine |
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| Country | Link |
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| CN (1) | CN110319959B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113739979B (en) * | 2021-09-09 | 2024-05-14 | 瑞庆汽车发动机技术有限公司 | Turbocharger shaft lock nut dynamic moment detection device and method |
| CN115451760B (en) * | 2022-08-08 | 2023-09-19 | 湖南航天有限责任公司 | Device for detecting resistance moment between inner ring and outer ring of tail wing on bullet |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342205B (en) * | 2010-08-31 | 2013-12-11 | 中国兵器工业集团第七○研究所 | Engine start moment of resistance method of testing |
| CN103674363A (en) * | 2012-09-18 | 2014-03-26 | 重庆长安汽车股份有限公司 | Test system for low-temperature starting resisting moment of engine |
| CN210268976U (en) * | 2019-07-11 | 2020-04-07 | 河南柴油机重工有限责任公司 | Large-torque diesel engine starting resistance moment measuring device |
-
2019
- 2019-07-11 CN CN201910622464.9A patent/CN110319959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106342205B (en) * | 2010-08-31 | 2013-12-11 | 中国兵器工业集团第七○研究所 | Engine start moment of resistance method of testing |
| CN103674363A (en) * | 2012-09-18 | 2014-03-26 | 重庆长安汽车股份有限公司 | Test system for low-temperature starting resisting moment of engine |
| CN210268976U (en) * | 2019-07-11 | 2020-04-07 | 河南柴油机重工有限责任公司 | Large-torque diesel engine starting resistance moment measuring device |
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| CN110319959A (en) | 2019-10-11 |
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