CN105136436B - Device and method for testing reliability of sealing ring of oil injector - Google Patents
Device and method for testing reliability of sealing ring of oil injector Download PDFInfo
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- CN105136436B CN105136436B CN201510452352.5A CN201510452352A CN105136436B CN 105136436 B CN105136436 B CN 105136436B CN 201510452352 A CN201510452352 A CN 201510452352A CN 105136436 B CN105136436 B CN 105136436B
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- fuel injector
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Abstract
The invention discloses a reliability testing device and method for a sealing ring of an oil sprayer. The method comprises a cold-hot alternating test method step and a high-temperature vibration durability test method step. The design of the invention with excellent price and simplification effectively simulates the high-temperature vibration and high-low temperature harsh environment conditions in complex working conditions after the fuel injector and the sealing ring are installed on the engine valve chamber, and simultaneously inspects the working performance adaptability of the test sample under the preset high-temperature vibration condition and high-low temperature condition.
Description
Technical field
The present invention relates to fuel injector sealing ring detection technique field, specially a kind of fuel injector sealing ring reliability testing dress
Put and method.
Background technology
The effect of the sealing ring of external fuel injector is to realize the sealing between fuel injector and valve cage cover lid, and sealing ring leads to
Pressing plate is crossed to be firmly attached on fuel injector form entirety with fuel injector.Pass through the compression of the one side vulcanised rubber layer of pressing plate
The axial float of fuel injector is limited, the sealing ring compression inside sealing ring, is close to fuel injector axial plane and realizes radial seal.
The fuel injector and its sealing ring used under engine complex working conditions is, it is necessary to examine sealing ring to the reliable of fuel injector simultaneously
Property, is included under the conditions of high-temperature vibrating and alternating hot and cold, the installation function and sealing property of pressing plate and sealing ring to fuel injector.
But existing test device is tested using actual fuel injector and sealing ring, method of testing also mostly using manually or
Measurement condition environment is single, and not only testing cost is high, and it is not very high to test accurate rate.
The content of the invention
The invention aims to overcome above-mentioned deficiency to provide a kind of fuel injector sealing ring RTA reliability test assembly and side
Method.
A kind of fuel injector sealing ring RTA reliability test assembly, including a pair of pressing plates, the fuel injector simulating piece for being provided with the shaft shoulder
And the sealing ring of step mounting surface, thrust surface and mounting hole is provided with, the fuel injector simulating piece is located in mounting hole, described
One end of pressing plate is fixed on step mounting surface by follower bolt, and the other end of the pressing plate is bonded with the upper surface of the shaft shoulder,
The thrust surface is bonded with the lower surface of the shaft shoulder, and one side vulcanization rubber is provided between the other end of the pressing plate and the upper surface of the shaft shoulder
Glue-line, the inner wall of the hole installing are provided with the sealing ring coordinated with fuel injector simulating piece, and the inside of the fuel injector simulating piece is real
The heart, the top of the fuel injector simulating piece are provided with screwed hole.
A kind of alternating hot and cold method of testing of fuel injector sealing ring RTA reliability test assembly comprises the following steps：001st, spray
This part of appearance and size being connected in oily device simulating piece with sealing ring is fabricated to the appearance and size of actual fuel injection device, makes oil spout
The total length of device simulating piece is less than the total length of actual fuel injection device, the gross weight of fuel injector simulating piece is equal to actual fuel injection device
Gross weight；002nd, described fuel injector sealing ring RTA reliability test assembly is placed horizontally at built in high low temperature cycles test case
On pallet, pallet is placed horizontally to the center of high low temperature cycles test case, not accessible high low temperature cycles test case
Surrounding；003rd, the power supply of high low temperature cycles test case is connected, the temperature inside the box is dropped to -40 DEG C from room temperature in 1min, it is small to stablize 1
Shi Hou, 100 DEG C are raised to from -40 DEG C in 1min, stablized 1 hour, so far complete a circulation, complete alternating hot and cold circulation 10
It is secondary.
A kind of high-temperature vibrating durability test method of fuel injector sealing ring RTA reliability test assembly comprises the following steps：011、
This part of appearance and size being connected in fuel injector simulating piece with sealing ring is fabricated to the appearance and size of actual fuel injection device, made
The total length of fuel injector simulating piece is less than the total length of actual fuel injection device, the gross weight of fuel injector simulating piece is equal to actual fuel injection
The gross weight of device；012nd, coordinated using the screwed hole at the top of tooling bracket fastening bolt and fuel injector simulating piece, by described spray
Oily device sealing ring RTA reliability test assembly is arranged on fastening device support, records follower bolt torque；013rd, by step 012
Mounted fuel injector sealing ring RTA reliability test assembly and fastening device support are integrally placed in vibration rig and pass through work
Dress support fastening bolt is fixed；014th, the power supply of vibration rig is connected, by temperature stabilization in vibration rig in 90 DEG C；015、
Four kinds of measurement conditions are set, carry out single sinusoidal vibration by above-below direction successively under every kind of measurement condition；016th, close and shake
The power supply of dynamic test machine, injects kerosene into sealing ring, observe in sealing ring kerosene whether seepage, if seepage returns to upper one
Step, if non-leakage turn of next step；017th, the torque of measuring pressure plate bolt, if the torque after high-temperature vibrating is original torque
60% or more than 60%, turn in next step, previous step is returned if less than 60%；018th, whether observation pressing plate is broken after cooling down, and sees
Whether cracked examine one side vulcanised rubber layer.
The effective simulation of design of the excellent simplification of valency of the present invention is installed on engine air valve chamber when fuel injector and sealing ring
High-temperature vibrating in complex working condition and high/low temperature harsh and unforgiving environments situation afterwards, while test sample is checked in predetermined height
Service behaviour adaptability under warm vibration condition and high/low temperature condition.In addition, the present invention can reach following main purpose：1st, survey
Test result instructs the design optimization of sealing ring mechanical structure；2nd, structural reliability binding test result, draws structural reliability
Judge conclusion.This method can detect the parts of fuel injector sealing ring in high-temperature vibrating durable test and high and low temperature alternative bar
Whether there is fracture under part, release or disabler situation, to ensure that its long-term normal table in actual applications works.
Brief description of the drawings
Fig. 1 is alternating hot and cold test mode schematic diagram of the present invention；
Fig. 2 is fuel injector sealing ring RTA reliability test assembly structural representation；
Fig. 3 is high-temperature vibrating durable test view；
Fig. 4 is the structural representation that fuel injector simulating piece is arranged on sealing ring in fastening mounting bracket.
Embodiment
Below in conjunction with the accompanying drawings and embodiment further illustrates the present invention.
Embodiment：A kind of fuel injector sealing ring RTA reliability test assembly of the present invention, including a pair of pressing plates 32, it is provided with the shaft shoulder
21 fuel injector simulating piece 2 and the sealing ring 3 for being provided with step mounting surface 33, thrust surface 35 and mounting hole 36, its feature exist
In：The fuel injector simulating piece 2 is located in mounting hole 36, and step peace is fixed in one end of the pressing plate 32 by follower bolt 31
On dress face 33, the other end of the pressing plate 32 is bonded with the upper surface of the shaft shoulder 21, the lower surface of the thrust surface 35 and the shaft shoulder 21
Fitting, is provided with one side vulcanised rubber layer 37, the mounting hole 36 between the other end of the pressing plate 32 and the upper surface of the shaft shoulder 21
Inwall is provided with the sealing ring 34 coordinated with fuel injector simulating piece 2, and the inside of the fuel injector simulating piece 2 is solid, the oil spout
The top of device simulating piece 2 is provided with screwed hole 22.
Alternating hot and cold method of testing of the present invention comprises the following steps：001st, being connected in fuel injector simulating piece 2 with sealing ring 3
This part of appearance and size be fabricated to the appearance and size of actual fuel injection device, make fuel injector simulating piece 2 total length be less than it is real
The total length of border fuel injector, the gross weight of fuel injector simulating piece 2 is set to be equal to the gross weight of actual fuel injection device；002nd, by described spray
Oily device sealing ring RTA reliability test assembly is placed horizontally on the pallet 11 built in high/low temperature alternation test box 1, by the water of pallet 11
The center for being placed in high/low temperature alternation test box 1 is kept flat, the surrounding of not accessible high/low temperature alternation test box 1；003rd, connect
The power supply of high/low temperature alternation test box 1, makes the temperature inside the box drop to -40 DEG C from room temperature in 1min, after stablizing 1 hour, in 1min
It is interior that 100 DEG C are raised to from -40 DEG C, stablize 1 hour, so far complete a circulation, complete alternating hot and cold and circulate 10 times.
Alternating hot and cold test purpose is installation and sealing work(of the examination sealing ring to fuel injector under high temperature and cryogenic conditions
Energy.Fuel injector simulating piece 2 is process according to fuel injector actual outer dimensions, and the purpose for making fuel injector simulating piece 2 is section
About testing cost, simplify processing.Therefore, the inside of fuel injector simulating piece 2 for solid construction the oil channel structure without fuel injector, it is outside
Structure retains the coupling part of fuel injector and sealing ring, and the overall length of fuel injector simulating piece 2 is less than the physical length of fuel injector,
But need to ensure that the simplified weight of fuel injector simulating piece 2 is suitable with the actual weight of fuel injector.The skill of high/low temperature alternation test box 1
Art parameter is as follows：Operating voltage：AC380V ± 10%, 50Hz；Rated power：12kW；Test box temperature range：- 40 DEG C~130
℃；Temperature accuracy：±1℃.Test condition is as follows：Low temperature：-40℃×1hr；High temperature：100℃×1hr；Cycle-index：10 times,
The equipment that the model HRT405E of Chongqing Weier Test Equipment Co., Ltd.'s production can be used.
High-temperature vibrating durability test method comprises the following steps：011st, being connected with sealing ring 3 in fuel injector simulating piece 2
This part of appearance and size is fabricated to the appearance and size of actual fuel injection device, the total length of fuel injector simulating piece 2 is less than reality
The total length of fuel injector, the gross weight of fuel injector simulating piece 2 is set to be equal to the gross weight of actual fuel injection device；012nd, using tooling bracket
Fastening bolt 5 and the screwed hole 22 at the top of fuel injector simulating piece 2 coordinate, by described fuel injector sealing ring RTA reliability test assembly
On fastening device support 6, the torque of follower bolt 31 is recorded；013rd, by mounted fuel injector sealing ring in step 012
RTA reliability test assembly and fastening device support 6 are integrally placed in vibration testing machine 4 and solid by tooling bracket fastening bolt 7
It is fixed；014th, the power supply of vibration testing machine 4 is connected, by temperature stabilization in vibration testing machine 4 in 90 DEG C；The 015th, four kinds of test works are set
Condition, carry out single sinusoidal vibration by above-below direction successively under every kind of measurement condition；016th, the electricity of vibration testing machine 4 is closed
Source, injects kerosene into sealing ring 3, observe in sealing ring 3 kerosene whether seepage, if seepage returns to previous step, if not permeable
Leakage turns in next step；017th, the torque of measuring pressure plate bolt 31, if torque after high-temperature vibrating for original torque 60% or
More than 60%, turn in next step, previous step is returned if less than 60%；018th, whether observation pressing plate 32 is broken after cooling down, and observation is single
Whether face vulcanised rubber layer 37 is cracked.
The purpose of high-temperature vibrating durable test is under high-temperature vibrating, loading condition, and (emphasis is pressing plate and close to examination sealing ring
Seal) installation to fuel injector and sealing function.Fuel injector simulating piece 2 is process according to fuel injector actual outer dimensions,
The purpose for making fuel injector simulating piece 2 is to save testing cost, simplifies processing.Therefore, the inside of fuel injector simulating piece 2 is solid knot
Structure and the oil channel structure without fuel injector, external structure retain the coupling part of fuel injector and sealing ring, fuel injector simulating piece 2 it is total
Body length is less than the physical length of fuel injector, but needs to ensure the actual heavy of the simplified weight of fuel injector simulating piece 2 and fuel injector
Amount is suitable.The screwed hole 22 at the top of fuel injector simulating piece 2 is used to be fixed on fastening device support 6.The skill of vibration testing machine 4
Art parameter is as follows：Operating voltage：Three-phase 380V ± 10%, 50Hz；Rated power：16kW；Vibration-testing built-in temperature：90℃；
Temperature fluctuation value：±1℃；Temperature accuracy：±1℃；Vibration frequency：1~2000Hz；Mode of vibration：Frequency sweep, it is at random, sinusoidal, it is fixed
Frequently, the equipment that the model DC-1000-15 of Suzhou Sushi Testing Instrument Co., Ltd.'s production can be used.Fastening device
Support 6 should have enough rigidity, to ensure that the motion of shake table is correctly transferred to the survey of fuel injector simulating piece and sealing ring
Sample coupon.Installing plate quality is symmetrical, to reduce the unbalanced load of shake table.
Mode of vibration：According to fuel injector on the basis of the actual installation state of engine, carried out by above-below direction single
Sinusoidal vibration.The present embodiment test shares the vibration parameters such as four kinds of measurement conditions, corresponding acceleration (load), frequency and number
It is as follows：
The present embodiment test result is as follows：
1) kerosene is injected into sealing ring 3 in the condition of high temperature, is stored at room temperature 72 hours, ne-leakage.
2) torque of follower bolt 31：
3) bolt is disassembled, range estimation pressing plate 32 is intact without fracture, one side vulcanised rubber layer 37 and sealing ring 34.
Claims (1)
1. a kind of high-temperature vibrating durability test method of fuel injector sealing ring RTA reliability test assembly, described device includes a pair of pressures
Plate (32), the fuel injector simulating piece (2) for being provided with the shaft shoulder (21) and be provided with step mounting surface (33), thrust surface (35) and peace
The sealing ring (3) of hole (36) is filled, the fuel injector simulating piece (2) is located in mounting hole (36), and one end of the pressing plate (32) leads to
Cross follower bolt (31) to be fixed on step mounting surface (33), the other end of the pressing plate (32) pastes with the upper surface of the shaft shoulder (21)
Close, the thrust surface (35) is bonded with the lower surface of the shaft shoulder (21), the other end of the pressing plate (32) and the upper end of the shaft shoulder (21)
One side vulcanised rubber layer (37) is provided between face, mounting hole (36) inwall is provided with close with fuel injector simulating piece (2) cooperation
Seal (34), the inside of the fuel injector simulating piece (2) is solid, and the top of the fuel injector simulating piece (2) is provided with screwed hole
(22)；Characterized in that, the method for testing comprises the following steps：
011st, this part of appearance and size being connected in fuel injector simulating piece (2) with sealing ring (3) is fabricated to actual fuel injection
The appearance and size of device, the total length of fuel injector simulating piece (2) is less than the total length of actual fuel injection device, make fuel injector simulating piece
(2) gross weight is equal to the gross weight of actual fuel injection device；
012nd, coordinated using the screwed hole (22) at the top of the first tooling bracket fastening bolt (5) and fuel injector simulating piece (2), by institute
The fuel injector sealing ring RTA reliability test assembly stated is arranged on fastening device support (6), records follower bolt (31) torque；
013rd, mounted fuel injector sealing ring RTA reliability test assembly in step 012 and fastening device support (6) are integrally put
It is in vibration rig (4) and fixed by the second tooling bracket fastening bolt (7)；
014th, the power supply of vibration rig (4) is connected, by vibration rig (4) interior temperature stabilization in 90 DEG C；
The 015th, four kinds of measurement conditions are set, carry out single sinusoidal vibration by above-below direction successively under every kind of measurement condition；
016th, the power supply of vibration rig (4) is closed, to the interior injection kerosene of sealing ring (3), whether is observation sealing ring (3) interior kerosene
Seepage, if seepage returns to previous step, if non-leakage turn of next step；
017th, the torque of measuring pressure plate bolt (31), if torque after high-temperature vibrating for original torque 60% or 60% with
On, turn in next step, previous step is returned if less than 60%；
018th, observe whether pressing plate (32) is broken after cooling down, whether observation one side vulcanised rubber layer (37) is cracked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510452352.5A CN105136436B (en) | 2015-07-29 | 2015-07-29 | Device and method for testing reliability of sealing ring of oil injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510452352.5A CN105136436B (en) | 2015-07-29 | 2015-07-29 | Device and method for testing reliability of sealing ring of oil injector |
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| CN105136436A CN105136436A (en) | 2015-12-09 |
| CN105136436B true CN105136436B (en) | 2018-01-16 |
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| CN201510452352.5A Active CN105136436B (en) | 2015-07-29 | 2015-07-29 | Device and method for testing reliability of sealing ring of oil injector |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268183A (en) * | 2018-11-20 | 2019-01-25 | 宁波裕隆汽车制泵有限公司 | A kind of fuel injector installation latch closure and its processing method |
| CN114577463B (en) * | 2022-05-05 | 2022-08-12 | 西安航天动力研究所 | Reliability evaluation method of bolt injector |
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