CN116026600A - Air distributor starting test platform and test method - Google Patents
Air distributor starting test platform and test method Download PDFInfo
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- CN116026600A CN116026600A CN202211734032.5A CN202211734032A CN116026600A CN 116026600 A CN116026600 A CN 116026600A CN 202211734032 A CN202211734032 A CN 202211734032A CN 116026600 A CN116026600 A CN 116026600A
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- air
- air inlet
- motor
- pressure sensor
- air distributor
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Abstract
The invention discloses an air distributor starting test platform, which comprises an air distributor body; the motor is connected with a driving shaft of the air distributor body through a universal coupling; the air inlet device is communicated with the air inlet hole of the air distributor body; the air inlet pressure sensor is arranged at the air inlet hole of the air distributor main body and is used for detecting air inlet pressure; the air outlet pressure sensor is arranged at an air outlet of the air outlet channel of the air distributor body and is used for detecting the air outlet pressure; a rotation speed sensor for detecting the rotation speed of the drive shaft; and the first input end, the second input end and the third input end of the controller are respectively and electrically connected with the air inlet pressure sensor, the air outlet pressure sensor and the rotating speed sensor, and the first output end and the second output end of the controller are respectively and electrically connected with the air inlet device and the motor. The test method has the advantages of low test cost, small workload and high efficiency. The invention also discloses a method for starting the test of the air distributor, which has the advantages of low test cost, small workload and high efficiency.
Description
Technical Field
The invention belongs to the technical field of engine part tests, and particularly relates to an air distributor starting test platform and an air distributor starting test method.
Background
Because the weight of each moving part of the large and medium-sized marine diesel engine is large, the inertial force and the resistance are large during starting, and the large and medium-sized marine diesel engine is usually started by adopting a mode that compressed air directly enters a cylinder. An air distributor is one of the key components of such diesel engine starting systems and functions to sequentially feed compressed air into the individual cylinders of the diesel engine. In the long-term use process, the components of the air distributor often cause poor sealing, air leakage and other phenomena due to wear adaptation, corrosion blockage and other reasons, so that the air distributor is invalid, the starting performance of a diesel engine is directly influenced, and the maneuvering performance and the safety performance of a ship are further influenced.
Therefore, an air distributor is required to be subjected to a starting performance test to verify the performance of each component. In the prior art, although the performance test scheme of the air distributor is adopted, the performance test is usually carried out on the whole diesel engine through actual tests, and the problems of high test cost, large workload, low efficiency and the like exist.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide a platform for starting an air distributor to test, which has low test cost, small workload and high efficiency.
The second technical problem to be solved by the invention is to provide a method for starting an air distributor, which has the characteristics of simple operation, low cost, short period and high efficiency.
The technical scheme adopted by the invention for solving the first technical problem is as follows: an air distributor starts test platform, its characterized in that: comprising
The air distributor body comprises an end cover, a shell, a distribution disc, a thrust disc and a driving shaft, wherein the end cover is provided with an air inlet cavity and an air inlet hole communicated with the air inlet cavity, the shell is provided with at least two air outlet channels communicated with the air inlet cavity of the end cover, the distribution disc is arranged in the air inlet cavity of the end cover and used for distributing air to the corresponding air outlet channels, and the thrust disc is arranged in the air inlet cavity of the end cover and driven by the driving shaft to be close to or far away from the distribution disc;
the motor is connected with a driving shaft of the air distributor body through a universal coupling;
the air inlet device is communicated with the air inlet hole of the air distributor body;
the air inlet pressure sensor is arranged at the air inlet hole of the air distributor main body and is used for detecting air inlet pressure;
the air outlet pressure sensor is arranged at an air outlet of the air outlet channel of the air distributor body and is used for detecting the air outlet pressure;
a rotation speed sensor for detecting the rotation speed of the drive shaft;
and the first input end, the second input end and the third input end of the controller are respectively and electrically connected with the air inlet pressure sensor, the air outlet pressure sensor and the rotating speed sensor, and the first output end and the second output end of the controller are respectively and electrically connected with the air inlet device and the motor.
The mode of opening and closing the air inlet device is specifically that the air inlet device further comprises an electromagnetic valve used for opening and closing the air inlet device, and a third output end of the controller is electrically connected with the electromagnetic valve.
In order to position the air distributor shell and the motor, the air distributor further comprises a positioning tool connected with the air distributor shell and the motor. In this way, it is advantageous for the motor to be connected to the drive shaft of the air distributor.
The air inlet mode can be various, and preferably, the air inlet device adopts high-pressure air, or a nitrogen gas cylinder, or an air compressor for air inlet.
The invention solves the second technical problem by adopting the technical proposal that: a method for starting an air dispenser, the method comprising the steps of:
1) Starting an air inlet device, presetting the air pressure to be 0.5-5 MPa, and acquiring the actually measured air inlet pressure value of the air inlet pressure sensor;
2) The gas is distributed to each gas outlet channel along with the operation of the air distributor body, and the actually measured gas outlet pressure value and the gas outlet sequence of the gas outlet pressure sensor (4) are obtained;
3) Starting a motor, presetting the rotating speed of the motor to be 80-120 r/min, acquiring an actual measurement rotating speed value of the rotating speed sensor, setting the running time interval of the motor to be 5-10 s and the stopping time interval to be 5-10 s at the preset rotating speed, and presetting the repeated starting times to be 3000-4000 times;
4) After all the starting times are completed, the rotating speed sensor is fed back to the controller, and the motor stops running.
Compared with the prior art, the invention has the advantages that: the starting condition of the air distributor is simulated by arranging the air distributor body, the motor, the air inlet device, the air inlet pressure sensor, the air outlet pressure sensor, the rotating speed sensor and the controller, so that the starting performance of the air distributor is tested, the whole diesel engine is not required to be tested, the operation is simple, the cost is low, the workload is small, the period is short, the test efficiency is greatly improved, in addition, the test platform is small in size and compact in structure, and the running-in test, the friction and wear test and the like can be performed besides the starting test of the air distributor.
Drawings
FIG. 1 is a schematic view of an air distributor start-up test platform according to an embodiment of the present invention;
FIG. 2 is a partial schematic view of an air distributor start test platform according to an embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of FIG. 2;
fig. 4 is a block diagram of an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Referring to fig. 1-4, a preferred embodiment of the invention is shown. The air distributor starting test platform comprises an air distributor body 1, a motor 7, an air inlet device 2, an air inlet pressure sensor 3, an air outlet pressure sensor 4, a rotating speed sensor 5, a controller 6, an electromagnetic valve 8, a positioning tool and other main components.
The air distributor body 1 adopts the existing structure, and specifically comprises an end cover 11, a shell 12, a distribution disc 13, a thrust disc 14 and a driving shaft 15, wherein the end cover 11 is provided with an air inlet cavity and an air inlet hole 111 communicated with the air inlet cavity, the shell 12 is provided with at least two air outlet channels communicated with the air inlet cavity of the end cover 11, the air outlet channels are provided with air outlets 121, the distribution disc 13 is arranged in the air inlet cavity of the end cover 11 and is used for distributing air to the corresponding air outlet channels, and the thrust disc 14 is arranged in the air inlet cavity of the end cover 11 and driven by the driving shaft 15 to be close to or far away from the distribution disc 13. The drive shaft 15 is externally provided with bearings and is additionally provided with a sealing cover plate and a sealing ring at the joint of the air distributor housing 12.
The motor 7 is connected with a driving shaft 15 of the air distributor body 1 through a universal coupling 8 so as to ensure coaxiality when the motor 7 drives the air distributor body 1 to operate. The power of the motor is more than 2 KW.
The air inlet device 2 is communicated with the air inlet hole 111 of the air distributor body 1; the air inlet device 2 adopts a high-pressure air cylinder which is connected with an air compressor, and can also adopt a nitrogen gas cylinder or an air compressor for air inlet.
The intake air pressure sensor 3 is provided at an intake hole 111 of the air distributor body 1, and detects an intake air pressure.
The air outlet pressure sensor 4 is disposed at the air outlet 121 of the air outlet passage of the air distributor body 1, and is used for detecting the air outlet pressure.
The rotational speed sensor 5 detects the rotational speed of the drive shaft 15.
The first input end, the second input end and the third input end of the controller 6 are respectively and electrically connected with the air inlet pressure sensor 3, the air outlet pressure sensor 4 and the rotating speed sensor 5, and the first output end and the second output end of the controller are respectively and electrically connected with the air inlet device 2 and the motor 7.
The electromagnetic valve 8 is used for opening and closing the air inlet device 2, and a third output end of the controller 6 is electrically connected with the electromagnetic valve 8.
The positioning fixture is connected with the air distributor shell and the motor 7. The positioning fixture comprises a distributor mounting plate 91, a motor mounting plate 92 and a bottom plate 93 for connecting the distributor mounting plate 91 and the motor mounting plate 92, wherein the distributor mounting plate 91 and the motor mounting plate 92 are vertically extended and oppositely arranged. The housing 12 of the air distributor is connected with the distributor mounting plate 91 through fasteners, and the right side of the distributor mounting plate 91 is provided with a bearing cover plate 94 to reduce the movement offset and abrasion of the driving shaft 15 and ensure the tightness of the air distributor body 1 during operation. The parallelism of the dispenser mounting plate 91 and the motor mounting plate 92 is 0.02mm or less, and the perpendicularity of the dispenser mounting plate 91 with the drive shaft 15 and the motor mounting plate 92 with the motor spindle is 0.02mm or less.
The embodiment also discloses a method for starting the test of the air distributor, which adopts the air distributor starting test platform to carry out the test and comprises the following steps:
1) The air inlet device 2 is started, the air pressure is preset to be 0.5-5 MPa, and the actually measured air inlet pressure value of the air inlet pressure sensor 3 is obtained. The measured intake pressure value is fed back to the solenoid valve 8, and if the measured intake pressure value is lower than the preset gas pressure value and cannot rise any more, the solenoid valve 8 is closed. And simultaneously, the feedback is sent to the controller 6, and the controller 6 controls the motor 7 to stop running.
2) The gas is distributed to each gas outlet channel along with the operation of the air distributor body 1, is sequentially discharged from each gas outlet channel, and the measured gas outlet pressure value of the gas pressure sensor 4 is obtained; the actually measured air outlet pressure value is fed back to the controller 6, the air outlet sequence and the air outlet pressure value are judged, and when the air outlet sequence and the air outlet pressure value accord with expectations, the air distributor is in the actual working condition. Specifically, the starting air distributes the compressed air into each air path along with the rotation of the distribution plate 13, and is sequentially discharged from each air outlet channel, thereby realizing the sequential starting of each cylinder. The control air acts on the distribution plate 13 to press the distribution plate 13 against the thrust plate 14, thereby reducing air leakage between the abutment surfaces of the distribution plate 13 and the thrust plate 14. At the same time, the starting air pressure is regulated through the side air holes.
3) Starting the motor 7, presetting the rotating speed of the motor 7 to be 80-120 r/min, acquiring the actual measured rotating speed value of the rotating speed sensor 5, setting the running time interval 5-10 s and the stopping time interval 5-10 s of the motor 7 at the preset rotating speed, completing one-time starting, and presetting the repeated starting times to be 3000-4000 times so as to simulate the actual working condition of the air distributor.
4) After all the starting times are completed, the rotation speed sensor feeds back to the controller, and the motor 7 stops running. The air distributor is disassembled and inspected, and the abrasion condition of each friction pair in the air distributor body is observed so as to test the starting performance of the air distributor.
The test platform has the advantages of small volume, compact structure, simple test method operation, low cost, short period and high efficiency. The test period of the whole diesel engine is more than 30 days, and the starting performance test of the air distributor can be completed only by 3 days by adopting the test platform and the method.
Claims (5)
1. An air distributor starts test platform, its characterized in that: comprising
An air distributor body (1) comprises an end cover (11), a shell (12), a distribution disc (13), a thrust disc (14) and a driving shaft (15), wherein the end cover (11) is provided with an air inlet cavity and an air inlet hole (111) communicated with the air inlet cavity, the shell (12) is provided with at least two air outlet channels communicated with the air inlet cavity of the end cover (11), the distribution disc (13) is arranged in the air inlet cavity of the end cover (11) and is used for distributing air to the corresponding air outlet channels, and the thrust disc (14) is arranged in the air inlet cavity of the end cover (11) and is driven by the driving shaft (15) to be close to or far away from the distribution disc (13);
a motor (7) connected with a driving shaft (15) of the air distributor body (1) through a universal coupling (8);
an air inlet device (2) communicated with an air inlet hole (111) of the air distributor body (1);
an intake pressure sensor (3) which is provided at an intake hole (111) of the air distributor body (1) and detects an intake pressure;
the air outlet pressure sensor (4) is arranged at an air outlet (121) of the air outlet channel of the air distributor body (1) and is used for detecting air outlet pressure;
a rotation speed sensor (5) for detecting the rotation speed of the drive shaft (15);
and the first input end, the second input end and the third input end of the controller (6) are respectively and electrically connected with the air inlet pressure sensor (3), the air outlet pressure sensor (4) and the rotating speed sensor (5), and the first output end and the second output end of the controller are respectively and electrically connected with the air inlet device (2) and the motor (7).
2. The air dispenser start-up test platform of claim 1, wherein: the air inlet device is characterized by further comprising an electromagnetic valve (8) for opening and closing the air inlet device (2), and a third output end of the controller (6) is electrically connected with the electromagnetic valve (8).
3. The air dispenser start-up test platform of claim 1, wherein: the positioning tool (9) is connected with the air distributor shell (12) and the motor (7).
4. The air dispenser start-up test platform of claim 1, wherein: the air inlet device (2) adopts high-pressure air, or a nitrogen gas cylinder, or an air compressor for air inlet.
5. A method of air dispenser start-up testing using an air dispenser start-up test platform according to any one of claims 1 to 4, comprising the steps of:
1) starting an air inlet device (2), presetting the air pressure to be 0.5-5 MPa, and obtaining the actually measured air inlet pressure value of an air inlet pressure sensor (3);
2) The gas is distributed to each gas outlet channel along with the operation of the air distributor body (1), and the actually measured gas outlet pressure value and the gas outlet sequence of the gas outlet pressure sensor (4) are obtained;
3) Starting a motor (7), presetting the rotating speed of the motor (7) to be 80-120 r/min, acquiring an actually measured rotating speed value of the rotating speed sensor (5), setting the running time interval 5-10 s and the stopping time interval 5-10 s of the motor (7) at the preset rotating speed, and presetting the repeated starting times to be 3000-4000 times;
4) After all starting times are completed, the rotating speed sensor (5) feeds back to the controller, and the motor (7) stops running.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734032.5A CN116026600A (en) | 2022-12-30 | 2022-12-30 | Air distributor starting test platform and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211734032.5A CN116026600A (en) | 2022-12-30 | 2022-12-30 | Air distributor starting test platform and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116026600A true CN116026600A (en) | 2023-04-28 |
Family
ID=86077396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211734032.5A Pending CN116026600A (en) | 2022-12-30 | 2022-12-30 | Air distributor starting test platform and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116026600A (en) |
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2022
- 2022-12-30 CN CN202211734032.5A patent/CN116026600A/en active Pending
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