CN2833548Y - Tool for measuring air leakage of piston - Google Patents
Tool for measuring air leakage of piston Download PDFInfo
- Publication number
- CN2833548Y CN2833548Y CN 200520076733 CN200520076733U CN2833548Y CN 2833548 Y CN2833548 Y CN 2833548Y CN 200520076733 CN200520076733 CN 200520076733 CN 200520076733 U CN200520076733 U CN 200520076733U CN 2833548 Y CN2833548 Y CN 2833548Y
- Authority
- CN
- China
- Prior art keywords
- air leakage
- air
- orifice plate
- connection block
- piston
- 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
- 239000011521 glass Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- 238000005070 sampling Methods 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
Landscapes
- Examining Or Testing Airtightness (AREA)
- Measuring Volume Flow (AREA)
Abstract
The utility model provides a piston gas leakage measuring tool, is equipped with the air current orifice plate of taking the orifice in the hole of connecting seat, and the orifice plate both sides are equipped with the sampling tube that welds as an organic whole with the connecting seat, and the pipe length is 8 ~ 10 times of the pipe internal diameter, and the orifice plate both sides are gapped 1.5 ~ 2mm with the sampling tube port, and this clearance communicates with each other with two air cocks in the connecting seat outside, and two air cocks are respectively by rubber tube and the port sealing connection of the U type glass pipe of dress, fixing on the bottom plate that has the scale. The utility model is used for the measurement of centering diesel engine piston air leakage for the small-size car, calculate the air leakage according to the air current around the throttle at the pressure differential of U type intraductal formation, not only simple structure, preparation are easy, and are with low costs, convenient operation moreover, measure accurate, the good reliability.
Description
Technical field
The utility model relates to a kind of survey instrument that is used to measure the diesel engine piston air leakage.
Background technology
When middle-size and small-size diesel engine for automobile is tested on test-bed, usually need the cylinder piston air leakage is carried out quantitative analysis, understand at any time because the pulling and the thermal load distortion of cylinder sleeve, cylinder body etc. and cause the variation of piston air leakage of wear of piston-rings, cylinder body.Because of blow-by of piston not only influences engine performance, and physical environment is damaged, so the air leakage of measurement and then control piston seems particularly important in actual life.Existing survey instrument to piston air leakage is generally import instrument, adopts elementary errors pressure transducer and electronic circuit plate structure, not only the price height, safeguard complicatedly, and reliability is also relatively poor, can't satisfy the conventional test requirement of middle-size and small-size diesel engine for automobile.
The utility model content
The technical problems to be solved in the utility model provides a kind of simple in structure, cheap, piston air leakage survey instrument that reliability is higher.
The technical solution of the utility model is: the air-flow orifice plate that is provided with center band throttle orifice in the endoporus of Connection Block, air-flow orifice plate both sides be provided with stopple coupon and with the gapped δ of stopple coupon end face=1.5～2mm, position, gap, both sides communicates with two valves in the Connection Block outside respectively, two valves are connected by the port sealing of sebific duct with U type glass tube respectively, and water is arranged in the glass tube.
Further technical scheme is: described Connection Block is a steel part, is divided into left and right two halves, is connected by bolt seal; Described stopple coupon is a stainless-steel tube, and pipe range a is 8～10 times of bore D; Stopple coupon and Connection Block are integrally welded; U type glass tube is fixed on the base plate, and scale is arranged on the base plate.
When the utility model uses, an end and Diesel Engine Breather outlet positive connection with stopple coupon, other end discharging directly into atmosphere, enter Connection Block by the high temperature and high pressure gas that leaks between piston and the cylinder sleeve through stopple coupon, gas before and after the throttle orifice throttling is fed two ports that make progress of U type glass tube respectively by two valves and sebific duct, make the water column in the glass tube form difference in height, and be converted to pressure differential, according to the relation formula of following mass rate and differential pressure, just can draw the air leakage of diesel engine piston:
Wherein: q
m---fluid mass flow, kg/s
C---efflux coefficient
β---diameter ratio, β=χ/D
ε---expansibility factor
χ---the throttle orifice or the throat diameter of throttling element under the condition of work, m
Δ P---differential pressure, Pa
ρ---fluid density, kg/m
3
The utility model only is made of the minority part, and is simple in structure, makes easily, and cost is low, and working service is convenient, and meter is calculated accurately really, generally what fault can not occur, and reliability is higher, is specially adapted to the conventional test of middle-size and small-size diesel engine for automobile.
Description of drawings
Accompanying drawing is the utility model structural representation.
Embodiment
As figure, left and right Connection Block 3 is connected by bolt seal, the centre clamps airflow hole plate 2, and it is the throttle orifice of χ that there is diameter at the orifice plate center, and the orifice plate both sides are provided with the stopple coupon 1 of the employing stainless-steel tube that is welded into one with Connection Block, pipe range a is 8.5 times of inside diameter D, gap delta=the 1.5mm of pipe port and orifice plate, this gap communicates with valve 4, and valve is connected by the two ends of sebific duct 7 with U type glass tube 5, water is arranged in the glass tube, and glass tube is fixed on the graduated base plate 6.
Claims (5)
1, a kind of piston air leakage survey instrument, it is characterized in that being provided with in the endoporus of Connection Block the air-flow orifice plate of center band throttle orifice, air-flow orifice plate both sides be provided with stopple coupon and with the gapped δ of stopple coupon end face=1.5～2mm, position, gap, both sides communicates with two valves in the Connection Block outside respectively, two valves are connected by the port sealing of sebific duct with U type glass tube respectively, and water is arranged in the glass tube.
2, by the described piston air leakage survey instrument of claim 1, it is characterized in that described Connection Block is a steel part, be divided into left and right two halves, connect by bolt seal.
3, by the described piston air leakage survey instrument of claim 1, it is characterized in that described stopple coupon is a stainless-steel tube, pipe range a is 8～10 times of bore D.
4, by claim 2 or 3 described piston air leakage survey instruments, it is characterized in that stopple coupon and Connection Block are integrally welded.
5, by the described piston air leakage survey instrument of claim 1, it is characterized in that U type glass tube is fixed on the base plate, has scale on the base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076733 CN2833548Y (en) | 2005-10-27 | 2005-10-27 | Tool for measuring air leakage of piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520076733 CN2833548Y (en) | 2005-10-27 | 2005-10-27 | Tool for measuring air leakage of piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2833548Y true CN2833548Y (en) | 2006-11-01 |
Family
ID=37197860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520076733 Expired - Fee Related CN2833548Y (en) | 2005-10-27 | 2005-10-27 | Tool for measuring air leakage of piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2833548Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782471A (en) * | 2009-10-28 | 2012-11-14 | 普兰德有限两合公司 | Method for leak-testing hand-held piston stroke pipettes and associated leak-testing apparatus |
| CN104406749A (en) * | 2014-11-20 | 2015-03-11 | 湖南江滨机器（集团）有限责任公司 | Simulation test method of air leakage of piston and simulation test device thereof |
| CN105784292A (en) * | 2016-03-09 | 2016-07-20 | 上海工程技术大学 | Piston air leakage amount measurement system based on balanced flow meter |
| CN107560803A (en) * | 2017-10-11 | 2018-01-09 | 凤城市瑞普增压器制造有限公司 | Booster intermediate body water jacket tiny structure inspection of hermetic seal device |
| CN111272340A (en) * | 2020-02-27 | 2020-06-12 | 中船澄西船舶修造有限公司 | Piston assembly's air tightness test device |
-
2005
- 2005-10-27 CN CN 200520076733 patent/CN2833548Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102782471A (en) * | 2009-10-28 | 2012-11-14 | 普兰德有限两合公司 | Method for leak-testing hand-held piston stroke pipettes and associated leak-testing apparatus |
| CN102782471B (en) * | 2009-10-28 | 2015-09-30 | 普兰德有限两合公司 | Method for the Leakage Test of hand-held stroke of piston suction pipe and the Leakage Test device for the method |
| CN104406749A (en) * | 2014-11-20 | 2015-03-11 | 湖南江滨机器（集团）有限责任公司 | Simulation test method of air leakage of piston and simulation test device thereof |
| CN105784292A (en) * | 2016-03-09 | 2016-07-20 | 上海工程技术大学 | Piston air leakage amount measurement system based on balanced flow meter |
| CN107560803A (en) * | 2017-10-11 | 2018-01-09 | 凤城市瑞普增压器制造有限公司 | Booster intermediate body water jacket tiny structure inspection of hermetic seal device |
| CN107560803B (en) * | 2017-10-11 | 2024-04-30 | 凤城市瑞普增压器制造有限公司 | Micro negative pressure sealing inspection device for intermediate water jacket of supercharger |
| CN111272340A (en) * | 2020-02-27 | 2020-06-12 | 中船澄西船舶修造有限公司 | Piston assembly's air tightness test device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN2833548Y (en) | Tool for measuring air leakage of piston | |
| CN201983961U (en) | Negative pressure sampling analytical system for gas analyzer | |
| CN202075022U (en) | Online real-flow calibrating device for small natural gas flowmeter | |
| CN115824322A (en) | Natural gas engine fuel flow detecting system | |
| CN201555685U (en) | Pressure sensor's installation, calibration equipment | |
| CN203069340U (en) | Carbon tank performance detecting device | |
| CN104897380A (en) | Common-rail pipe pressure-limiting valve matching element pressure-holding stroke detecting device and measuring method | |
| CN110470569A (en) | A kind of capillary pipeline vapour lock measuring device and measuring method | |
| CN201021913Y (en) | Pipe or container leakage checking device | |
| CN2407347Y (en) | Pipeline pressure tester | |
| CN108051350A (en) | A kind of porous material testing permeability device and test method | |
| CN200989802Y (en) | Accurate measuring device for effective flow area of complex three-dimensional face hole | |
| CN206161289U (en) | Oil tank pressure reversal testing machine | |
| CN2884151Y (en) | Multiple measuring rod secondary equalized pressure type equal speed tube flow-rate sensor | |
| CN203287151U (en) | An ignition plug type cylinder pressure meter | |
| CN207095808U (en) | Cylinder package seal checker | |
| CN201795815U (en) | Anti-blocking type low-speed pipe flow meter | |
| CN204177426U (en) | Plug-in type one-piece type temperature and pressure compensation holder hand shaft flowmeter | |
| CN201177072Y (en) | Integral double flange combined ball needle valve | |
| CN201897489U (en) | Mass flowmeter for integrated V-shaped cone | |
| CN202547932U (en) | Exhaust blocking mechanism capable of switchable detection | |
| CN203310453U (en) | Multifunctional flow measuring instrument | |
| CN201935811U (en) | Testing device for automobile air conditioning system | |
| CN101598652B (en) | Device for measuring oil content of gas blowby of crankcase | |
| CN220487751U (en) | High-precision comprehensive performance testing system for high-flow injection valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |