CN216286382U - Early warning system for predicting residual life of diesel engine of proportional risk model - Google Patents
Early warning system for predicting residual life of diesel engine of proportional risk model Download PDFInfo
- Publication number
- CN216286382U CN216286382U CN202121500929.2U CN202121500929U CN216286382U CN 216286382 U CN216286382 U CN 216286382U CN 202121500929 U CN202121500929 U CN 202121500929U CN 216286382 U CN216286382 U CN 216286382U
- Authority
- CN
- China
- Prior art keywords
- information display
- diesel engine
- warning system
- early warning
- residual life
- 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.)
- Expired - Fee Related
Links
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 238000001514 detection method Methods 0.000 claims description 6
- 238000003860 storage Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 11
- 230000008569 process Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 description 13
- 238000010586 diagram Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000013473 artificial intelligence Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Landscapes
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The utility model provides an early warning system for predicting the residual life of a diesel engine of a proportional risk model. The early warning system for predicting the residual life of the diesel engine of the proportional risk model comprises: an information display; the supporting frame is fixedly arranged at the bottom of the information display, and the top of the supporting frame is fixedly provided with a suction fan; the connecting frame is fixedly arranged at the bottom of the front side of the information display; the cleaning assembly is connected inside the connecting frame in a sliding mode, and one end of the cleaning assembly is fixedly installed on one side of the outer surface of the suction fan. According to the early warning system for predicting the residual life of the diesel engine of the proportional risk model, the surface of the information display can be cleaned by arranging the suction fan, the connecting frame, the cleaning assembly and the like on the surface of the information display, so that the influence on the definition of the information display due to excessive dust adhered to the surface in the using process of the information display is avoided.
Description
Technical Field
The utility model relates to the field of diesel engines, in particular to an early warning system for predicting the residual life of a diesel engine of a proportional risk model.
Background
Diesel engines are engines that burn diesel fuel to obtain energy release.
The diesel engine is used as the heart of some vehicles and the like, the potential fault of the diesel engine may cause the function of the diesel engine to fail and stop working, and even cause the generation of catastrophic consequences in severe cases, so that in order to effectively avoid the occurrence of the potential fault, the deterioration degree and the residual service life of the current diesel engine and whether preventive maintenance is needed or not need to be accurately judged, and when the residual service life of the diesel engine is predicted by the diesel engine, an early warning system is needed to be used for reminding workers in order to avoid forgetting to predict the residual service life of the diesel engine due to forgetting.
And its display of the early warning system of current diesel engine direct mount is in repairing the workshop, because repair the workshop in with outside air circulation, in case the display uses the back for a long time, can have more dust because static adhesion influences the cleanness of display on its surface, probably influences the all kinds of circumstances that the staff normally observed and show on the display simultaneously.
Therefore, there is a need to provide an early warning system for predicting the remaining life of a diesel engine using a proportional risk model to solve the above technical problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides an early warning system for predicting the residual life of a diesel engine of a proportional risk model, which solves the problem that the surface of a display in the existing early warning system is stained with a large amount of dust to influence the normal observation of various data by workers.
In order to solve the technical problem, the early warning system for predicting the residual life of the diesel engine of the proportional risk model provided by the utility model comprises: an information display;
the supporting frame is fixedly arranged at the bottom of the information display, and the top of the supporting frame is fixedly provided with a suction fan;
the connecting frame is fixedly arranged at the bottom of the front side of the information display;
the cleaning assembly is connected inside the connecting frame in a sliding mode, and one end of the cleaning assembly is fixedly installed on one side of the outer surface of the suction fan;
and the fixing rods are fixedly arranged on the left side and the right side of the back of the information display.
Through set up suction fan, connection frame and clean subassembly etc. on the information display surface, alright clean the information display surface, avoid in the information display use, because the too much dust of surface adhesion influences the definition of information display.
Preferably, the cleaning assembly comprises a first connecting pipe, and the bottom end of the first connecting pipe is slidably connected to the inside of the connecting frame.
Preferably, the first connecting pipe is provided with a plurality of air suction holes on one side of the outer surface, and the scraper is fixedly arranged on the outer surface of the first connecting pipe and on one side of the air suction holes.
Preferably, a second connecting pipe is fixedly installed on the other side of the outer surface of the first connecting pipe, and one end of the second connecting pipe is fixedly installed on one side of the outer surface of the suction fan.
Preferably, the top fixed mounting at the information display back has a board of going of rolling over, the top fixed mounting who rolls over the board has drive assembly, drive assembly includes the motor, shaft coupling fixedly connected with pivot is passed through to the one end of motor output shaft, the first gear of top fixedly connected with of pivot.
Preferably, the top of the left side and the top of the left side of the information display are fixedly provided with a folding rod, the top end of the folding rod is rotatably connected with a second gear, the surfaces of the second gear and the first gear are meshed with a chain together, and one side of the outer surface of the first connecting pipe is fixedly connected with one side of the chain.
Through set up drive assembly, both sides at the information display back and set up the second gear, through the transmission of chain, alright drive cleaning assembly is automatic to be removed on the information display surface, does not need manual operation, and is more convenient.
Preferably, an alarm is fixedly installed at the bottom of one side of the information display.
Preferably, the input end of the information display is unidirectionally connected with the processor, the input end of the processor is bidirectionally connected with the information storage detection module, and the output end of the information display is unidirectionally connected with the alarm.
The processor transmits information to the information display, and meanwhile, the alarm gives an alarm, so that the working personnel can obtain early warning information in time, and the situation that the diesel engine needing to predict the residual service life cannot be predicted in time due to forgetting is avoided.
Compared with the related technology, the early warning system for predicting the residual life of the diesel engine of the proportional risk model has the following beneficial effects:
the utility model provides an early warning system for predicting the residual life of a diesel engine of a proportional risk model, which can clean the surface of an information display by arranging a suction fan, a connecting frame, a cleaning assembly and the like on the surface of the information display, and avoid the influence on the definition of the information display due to excessive dust adhered to the surface in the use process of the information display.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of an early warning system for predicting the remaining life of a diesel engine of a proportional risk model according to the present invention;
FIG. 2 is a schematic view of the cleaning assembly shown in FIG. 1;
FIG. 3 is a schematic structural view of the driving assembly shown in FIG. 1;
fig. 4 is a schematic structural diagram of a first embodiment of the early warning system for predicting the remaining life of the diesel engine of the proportional risk model provided in the present invention.
Reference numbers in the figures: 1. an information display 2, a fixed rod 3, a supporting frame 4, a suction fan 5 and a connecting frame,
6. a cleaning component 61, a first connecting pipe 62, a suction hole 63, a scraper blade 64, a second connecting pipe,
7. the folding plate is used for folding the clothes,
8. a driving component 81, a motor 82, a rotating shaft 83, a first gear,
9. a folding rod 10, a second gear 11, a chain 12, an alarm,
13. and the processor 14 is used for storing and detecting the information.
Detailed Description
The utility model is further described with reference to the following figures and embodiments.
First embodiment
Please refer to fig. 1, fig. 2 and fig. 3 in combination, wherein fig. 1 is a schematic structural diagram of a first embodiment of a pre-warning system for predicting the remaining life of a diesel engine of a proportional risk model according to the present invention; FIG. 2 is a schematic view of the cleaning assembly shown in FIG. 1; fig. 3 is a schematic structural diagram of the driving assembly shown in fig. 1. The diesel engine residual life prediction early warning system of the proportional risk model comprises: an information display 1;
the supporting frame 3 is fixedly arranged at the bottom of the information display 1, and the top of the supporting frame 3 is fixedly provided with a suction fan 4;
the connecting frame 5 is fixedly arranged at the bottom of the front surface of the information display 1;
the cleaning assembly 6 is connected to the inside of the connecting frame 5 in a sliding mode, and one end of the cleaning assembly 6 is fixedly installed on one side of the outer surface of the suction fan 4;
and the fixing rods 2 are fixedly arranged on the left side and the right side of the back of the information display 1.
Information display 1 passes through the power cord and is connected with external power source, 3 fixed mounting of support frame are in 1 bottom of information display, support for suction fan 4 provides, suction fan 4 also is connected with external power source through the power cord, suction fan 4 and information display 1 all can pass through the remote controller remote control, 5 fixed mounting of link frame are at 1 surface of information display, support for clean subassembly 6 provides, clean subassembly 6 removes on 1 surface of information display, can clear up the dust of 1 surperficial adhesion of information display etc.
The cleaning assembly 6 comprises a first connecting pipe 61, and the bottom end of the first connecting pipe 61 is slidably connected to the inside of the connecting frame 5.
The first connecting tube 61 is an aluminum tube, which is adapted to the height of the information display 1, and has a slider fixedly mounted at the bottom end thereof, which is slidable along the inside of the connecting frame 5.
The suction holes 62 are uniformly formed in the outer surface of the first connection pipe 61, dust can be sucked into the first connection pipe 61 by suction, one side of the scraper 63 can be in contact with the surface of the information display 1, some dust adhered to the surface of the information display 1 can be scraped, and the other side of the scraper 63 is flocky.
A second connecting pipe 64 is fixedly installed at the other side of the outer surface of the first connecting pipe 61, and one end of the second connecting pipe 64 is fixedly installed at one side of the outer surface of the suction fan 4.
The second connection pipe 64 is a rubber hose and communicates the first connection pipe 61 with the suction fan 4, thereby sucking air and dust into the suction fan 4, filtering the air, and discharging the filtered air.
The top fixed mounting at the back of information display 1 has a board 7 of going of turning over, the top fixed mounting who turns over board 7 has drive assembly 8, drive assembly 8 includes motor 81, shaft coupling fixedly connected with pivot 82 is passed through to the one end of motor 81 output shaft, the first gear 83 of top fixedly connected with of pivot 82.
The folding plate 7 is fixedly arranged in the middle of the back of the information display 1 through bolts, the driving assembly 8 is fixedly arranged on the folding plate 7, the motor 81 is connected with an external power supply through a power line and is a speed reduction motor which can rotate forward and backward, and the first gear 83 is fixedly arranged on the top end of the rotating shaft 82.
The top of the left side and the right side of the information display 1 is fixedly provided with a folding rod 9, the top end of the folding rod 9 is rotatably connected with a second gear 10, the second gear 10 and the surface of the first gear 83 are meshed with a chain 11 together, and one side of the outer surface of the first connecting pipe 61 is fixedly connected with one side of the chain 11.
The number of the folding rods 9 is 2, the folding rods are fixedly arranged at the tops of the left side and the right side of the information display 1, the second gear 10 is fixedly arranged at the top end of the folding rods 9 and is positioned on the same horizontal plane with the first gear 83, and the chain 11 is meshed with the first gear 83 and the second gear 10.
And an alarm 12 is fixedly arranged at the bottom of one side of the information display 1.
The working principle of the early warning system for predicting the residual life of the diesel engine of the proportional risk model provided by the utility model is as follows:
when the information display 1 is used for displaying the early warning information for predicting the residual service life of the diesel engine of the proportional risk model, if some dust adheres to the surface of the information display 1 and affects the definition, a worker can control the driving assembly 8 and the suction fan 4 to work through the remote controller.
The suction fan 4 operates to sweep up dust adhered to the surface of the information display 1 through the suction holes 62 and the scrapers 63 on the outer surfaces of the second connection pipe 64 and the first connection pipe 61 while sucking away the dust.
Meanwhile, the motor 81 works to drive the first gear 83 to work, and the first gear 83 drives the chain 11 to transmit between the first gear 83 and the second gear 10, so as to drive the cleaning assembly 6 to move and clean the surface of the information display 1.
Compared with the related technology, the early warning system for predicting the residual life of the diesel engine of the proportional risk model has the following beneficial effects:
through set up suction fan 4, connection frame 5 and clean subassembly 6 etc. on information display 1 surface, alright clean 1 surface of information display, avoid in the use of information display 1, because the too much dust of surface adhesion influences information display 1's definition.
Second embodiment
Referring to fig. 4, a proportional risk model based early warning system for predicting the remaining life of a diesel engine according to a first embodiment of the present application, and a proportional risk model based on a second embodiment of the present application provide another early warning system for predicting the remaining life of a diesel engine according to a second embodiment of the present application. The second embodiment is only the preferred mode of the first embodiment, and the implementation of the second embodiment does not affect the implementation of the first embodiment alone.
Specifically, the difference of the early warning system for predicting the residual life of the diesel engine of the proportional risk model provided by the second embodiment of the present application lies in that the input end of the information display 1 is unidirectionally connected with the processor 13, the input end of the processor 13 is bidirectionally connected with the information storage detection module 14, and the output end of the information display 1 is unidirectionally connected with the alarm 12.
The processor 13 can control the information display 1 and the alarm 12, the alarm 12 can carry out voice prompt for personnel, after early warning, the residual service life of the diesel engine needs to be predicted, the CBM is a strategy for realizing maintenance on demand by monitoring performance state parameters of the system, detecting fault symptoms in time and taking preventive measures, and serious consequences caused by excessive or insufficient maintenance can be avoided. In recent years, in order to meet the requirements of high safety, reliability and economy in airplane operation, airliners generally implement a CBM strategy for engine maintenance, scientifically monitor and manage the on-wing time, reduce the occurrence of sudden fault events, fully ensure the normal operation of airplane-based aircraft engines based on a proportional risk model according to the situation maintenance decision, and reduce the maintenance cost, thereby obtaining better social and economic benefits. However, currently, the aviation company still mainly bases on maintenance experience in the CBM decision practice of the engine, and an effective quantification method is lacked. The initial CBM decision is to detect some basic status signals, perform simple trend analysis according to a set threshold, and consider timely maintenance when the monitored value exceeds the threshold or the trend changes dramatically. The method is simple and easy to implement, but for a complex system such as an aircraft engine, the method is rough and difficult to reflect the comprehensive effect of various influencing factors. Therefore, the key of CBM decision is to establish a more accurate correspondence between the system state parameters and the health. At present, a great deal of research is carried out at home and abroad aiming at the problem, models are commonly established for the detection information of a mechanical system by using Kalman filtering, Markov processes, information fusion, artificial intelligence methods and the like, but the models have poor practicability in maintenance optimization decision-making. A modeling idea of Weber proportional risk regression is utilized, a functional relation between performance state parameters and wing time when the change is needed due to performance degradation is regressed according to historical fault data, and then a minimum maintenance cost and a maximum availability strategy are adopted to obtain a change decision threshold, so that whether the current engine needs preventive off-wing maintenance or not can be judged. When the covariates are more or the state number is larger, the dimension of the state transition probability matrix in the traditional M arko v decision process is large, and the method for calculating the maintenance threshold value is extremely complicated, so that the objective judgment on the maintenance decision is realized by adopting a simpler and more intuitive graphic method.
A proportional risk regression model is used for predicting the residual life of a diesel engine, the proportional risk regression model is a typical complex, nonlinear and repairable system, and the reasons for the replacement mainly include four types: life limitation to life, foreign object damage, random failures, airworthiness directive/service announcement specification. In which performance degradation is among the stochastic failures of the system, which is the subject of the present study as one of the important causes of engine revamp. The data which are sent back by the performance decline of the engine can more reasonably reflect the distribution characteristics of the performance decline of the engine by considering the mutual relation between the wing time and the performance parameters. The proportional risk regression model is used for researching the life cycle of the system and related covariate effects, can determine the influence degree of each parameter on the risk of the system, and is particularly suitable for modeling research on engine switching decisions. The basic assumption of this model is that the covariates (i.e., the accompanying variables associated with wing time) are independent of each other, so it is necessary to first analyze the correlation between the covariates to screen out the appropriate covariates.
The working principle of the early warning system for predicting the residual life of the diesel engine of the proportional risk model provided by the utility model is as follows:
the information of each diesel engine is recorded in the processor 13, and then the information of the diesel engine can be stored in the information storage and detection module 14.
Later, when several days before the residual life of the diesel engine is predicted, the information storage and detection module 14 can transmit information to the information display 1 through the processor 13, and meanwhile, the alarm 12 makes a sound to warn workers, so that the workers can find the residual life in time and detect the diesel engine needing the residual life prediction in time.
Compared with the related technology, the early warning system for predicting the residual life of the diesel engine of the proportional risk model has the following beneficial effects:
by transmitting the information to the information display 1 through the processor 13 and giving an alarm through the alarm 12, the working personnel can obtain early warning information in time, and the situation that the diesel engine needing to predict the residual service life cannot be predicted in time due to forgetting is avoided.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. The utility model provides a diesel engine residual life prediction of proportion risk model uses early warning system which characterized in that includes:
an information display;
the supporting frame is fixedly arranged at the bottom of the information display, and the top of the supporting frame is fixedly provided with a suction fan;
the connecting frame is fixedly arranged at the bottom of the front side of the information display;
the cleaning assembly is connected inside the connecting frame in a sliding mode, and one end of the cleaning assembly is fixedly installed on one side of the outer surface of the suction fan;
and the fixing rods are fixedly arranged on the left side and the right side of the back of the information display.
2. The pre-warning system for predicting the residual life of a diesel engine according to claim 1, wherein the cleaning assembly comprises a first connecting pipe, and a bottom end of the first connecting pipe is slidably connected to the inside of the connecting frame.
3. The early warning system for predicting the residual life of the diesel engine of the proportional risk model according to claim 2, wherein air suction holes are uniformly formed in one side of the outer surface of the first connecting pipe, and a scraper is fixedly mounted on the outer surface of the first connecting pipe and on one side of the air suction holes.
4. The pre-warning system for predicting the residual life of the diesel engine according to claim 3, wherein a second connecting pipe is fixedly installed on the other side of the outer surface of the first connecting pipe, and one end of the second connecting pipe is fixedly installed on one side of the outer surface of the suction fan.
5. The diesel engine residual life prediction early warning system of the proportional risk model according to claim 4, wherein a folding plate is fixedly mounted at the top of the back of the information display, a driving assembly is fixedly mounted at the top of the folding plate, the driving assembly comprises a motor, one end of an output shaft of the motor is fixedly connected with a rotating shaft through a coupler, and a first gear is fixedly connected to the top end of the rotating shaft.
6. The diesel engine residual life prediction early warning system of the proportional risk model according to claim 5, wherein a folding rod is fixedly mounted at the top of each of the left and right sides of the information display, a second gear is rotatably connected to the top end of the folding rod, a chain is meshed with the surfaces of the second gear and the first gear together, and one side of the outer surface of the first connecting pipe is fixedly connected with one side of the chain.
7. The diesel engine residual life prediction early warning system of the proportional risk model according to claim 1, wherein an alarm is fixedly installed at the bottom of one side of the information display.
8. The diesel engine residual life prediction early warning system of the proportional risk model according to claim 7, wherein an input end of the information display is unidirectionally connected with a processor, an input end of the processor is bidirectionally connected with an information storage detection module, and an output end of the information display is unidirectionally connected with the alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121500929.2U CN216286382U (en) | 2021-07-02 | 2021-07-02 | Early warning system for predicting residual life of diesel engine of proportional risk model |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121500929.2U CN216286382U (en) | 2021-07-02 | 2021-07-02 | Early warning system for predicting residual life of diesel engine of proportional risk model |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216286382U true CN216286382U (en) | 2022-04-12 |
Family
ID=81058825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121500929.2U Expired - Fee Related CN216286382U (en) | 2021-07-02 | 2021-07-02 | Early warning system for predicting residual life of diesel engine of proportional risk model |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216286382U (en) |
-
2021
- 2021-07-02 CN CN202121500929.2U patent/CN216286382U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2004211884A (en) | Heavy equipment having oil contamination degree diagnosing function, oil contamination degree measuring system on network using the heavy equipment, and operation method | |
| CN105841980B (en) | HXD type locomotive cooling duct monitoring of working condition and fault pre-diagnosing method and system | |
| CN111098463A (en) | Injection molding machine fault diagnosis system and diagnosis method | |
| CN112124229A (en) | Remote real-time fault diagnosis method for emergency pump truck | |
| CN106545490A (en) | A kind of vacuum pump energy-saving monitoring system and method | |
| CN216286382U (en) | Early warning system for predicting residual life of diesel engine of proportional risk model | |
| CN115946132B (en) | Intelligent intensive warehouse and logistics robot system and fault monitoring method thereof | |
| CN113593080A (en) | FPSO intelligence assembly carries monitored control system | |
| CN109436022A (en) | A kind of administrative region of a city rolling stock second level repairs technique | |
| CN102507244A (en) | Fault self-diagnosis expert system for hydraulic hoist | |
| CN114298384A (en) | Safe operation and maintenance prediction system and method suitable for ship loading and unloading arm | |
| CN101318539B (en) | Diagnosis method for air start system fault of ship | |
| CN110597053B (en) | Large mill process control system | |
| Voinalovych et al. | Rationale of acceptable risk of using tractors with operational damages of responsible parts | |
| US10408118B2 (en) | Engine coolant monitoring system for a machine | |
| KR20140028163A (en) | Management system for industrial robot | |
| CN210375690U (en) | Oil monitoring system | |
| CN218974364U (en) | On-line monitoring and early warning system for lubricating oil of ship main engine | |
| CN203500182U (en) | Remote fault diagnosis device for hydraulic system of forklift | |
| CN205959380U (en) | Multi -functional liquid crystal of boats and ships intelligence is reported to police and is extended unit | |
| CN215932668U (en) | Health management and 5G remote operation and maintenance system of hot blowing type snow sweeper | |
| CN213579938U (en) | Displacement pump leakproofness detecting system and fracturing system | |
| CN214533469U (en) | Novel marine pump protection device | |
| CN211951054U (en) | Hydraulic system and excavator | |
| CN113606039A (en) | Ship power system transmission fault diagnosis method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220412 |