CN203824720U - Reliability testing device of sealing gasket - Google Patents

Reliability testing device of sealing gasket Download PDF

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Publication number
CN203824720U
CN203824720U CN201420143181.9U CN201420143181U CN203824720U CN 203824720 U CN203824720 U CN 203824720U CN 201420143181 U CN201420143181 U CN 201420143181U CN 203824720 U CN203824720 U CN 203824720U
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CN
China
Prior art keywords
plate
sealing panel
electric heating
seal
gasket seal
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
Application number
CN201420143181.9U
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Chinese (zh)
Inventor
杜鹏
陆健
王洪忠
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Weichai Power Co Ltd
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Weichai Power Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
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Application filed by Weichai Power Co Ltd filed Critical Weichai Power Co Ltd
Priority to CN201420143181.9U priority Critical patent/CN203824720U/en
Application granted granted Critical
Publication of CN203824720U publication Critical patent/CN203824720U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a reliability testing device of a sealing gasket. The reliability testing device comprises a main body frame formed by a base plate, a top plate, and support columns connected between the base plate and the top plate. The structure characteristics of the device are as follows: an upper sealing plate and a lower sealing plate are arranged in the main body frame at an interval, wherein the two sealing plates are in an upper-lower corresponding mode; a pressure distribution unit is connected to the upper sealing plate; a pressure sensor is connected between the pressure distribution unit and the top plate; an electric heating mechanism is arranged at the bottom of the lower sealing plate; and a lifting mechanism is connected between the electric heating mechanism and the based plate. A medium through hole is formed in the position, approaching the center, of the upper sealing plate; and a medium injection tube is connected to the medium through hole. A temperature sensor is installed at the center of the bottom of the upper sealing plate; displacement sensors are installed at the edges; the signal output terminals of the pressure sensor, the temperature sensor, and the displacement sensors as well as the control terminals of the electric heating mechanism and the lifting mechanism are electrically connected to a control circuit. The provided reliability testing device has advantages of simple structure, convenient operation, and accurate and reliable measuring result.

Description

Gasket seal RTA reliability test assembly
Technical field
The utility model relates to a kind of gasket seal RTA reliability test assembly.
Background technology
The sealing property of engine is the important evidence of measured engine quality and performance.Along with the fast development of engine technology, and the raising of power performance and the economy performance requirement, Sealing Technology is being faced with larger challenge.If seal and badly not only can cause environmental pollution, energy dissipation, also can affect power performance and the serviceable life of vehicle.Wherein, affect a long-term reliability that key factor is gasket seal of sealing property, gasket seal is in use subject to the impact of temperature, working time and environment, when gasket performance reaches seal request, does not leak.
Evaluation to gasket seal long-term reliability at present, particularly the evaluation of non-metallic gasket reliability is mainly to utilize the method for in the past evaluating asbestos gasket: pad is placed under the environmental baseline of 150 ℃ through 22 hours, utilize clock gauge to measure the variation of contrast front and back load, the i.e. remaining load conservation rate of pad.There is following defect in existing gasket seal RTA reliability test assembly and method: 1) can only evaluate former and later two time points, can not monitor the real-time change of load; 2) cannot simulate the practical service environment of pad, the test result obtaining is unreliable; 3) the reliability related data obtaining seldom, cannot be carried out accurate evaluation to the overall performance of gasket seal.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of simple in structure, easy to operate, measurement result gasket seal RTA reliability test assembly accurately and reliably.
For solving the problems of the technologies described above, gasket seal RTA reliability test assembly of the present utility model comprises by base plate, top board and is connected to the main body frame that pillar between the two forms, its design feature is upper sealing panel and the lower seal plate that is arranged at intervals with upper and lower correspondence in described main body frame, on upper sealing panel, be connected with pressure distribution unit, between pressure distribution unit and top board, be connected with pressure transducer, the bottom of lower seal plate is provided with electric heating mechanism, between electric heating mechanism and base plate, is connected with lifting mechanism; On upper sealing panel, by paracentral position, offering in medium through hole and medium through hole and be connected with medium ascending pipe, the center of upper sealing panel bottom surface is provided with on temperature sensor, marginal position displacement transducer is installed; The control end of the signal output part of described pressure transducer, temperature sensor and displacement transducer and described electric heating mechanism and lifting mechanism is all electrically connected on a control circuit.
Adopt said structure, gasket seal to be tested is placed on the middle part of lower seal plate, utilize lifting mechanism to drive lower seal plate to rise, lower seal plate coordinates pad is compressed with upper sealing panel, in gasket seal, form a closed cavity, by medium through hole to injected media in this closed cavity, utilize electric heating mechanism to heat lower seal plate, thereby the actual work temperature of simulation gasket seal, pressure transducer and temperature sensor can record respectively pressure and the working temperature of loading, utilize displacement transducer can record the variation in thickness of pad, thereby lifting mechanism and electric heating mechanism are carried out to closed-loop control.The variation in thickness value signal of force value signal obtained above, temperature value signal and pad all sends to control circuit, and control circuit, according to the reliability evaluation standard of gasket seal, carries out fail-safe analysis to gasket seal.
The induction end of described temperature sensor leans out the bottom surface of upper sealing panel, and the end face of lower seal plate offers deep gouge on the position corresponding with temperature sensor, and deep gouge is for holding the induction end of temperature sensor.In test, directly and medium contact, the actual applying working condition of more approaching and gasket seal, has guaranteed the accuracy of test result to the induction end of temperature sensor.
The marginal position of described upper sealing panel bottom surface offers groove, and displacement transducer is arranged in groove.Displacement transducer for measure upper and lower seal pad spacing variable quantity, for fear of spacing is too small, displacement transducer is caused to damage, therefore, specially in the bottom surface of upper sealing panel, offer groove and carry out installation position displacement sensor.
Described pressure distribution unit comprises top board and the vertical many connecting links that are fixed between upper sealing panel and top board that are connected with pressure transducer and be arranged in parallel with upper sealing panel, and the even spaced ring of above-mentioned each connecting link is located at the edge, border of upper sealing panel end face.This kind of structure is set and can simulates the stressing conditions in flange connection, utilize the distribution of force of each coupling bolt in each connecting link simulation flange connection, make the more approaching practical service environment with gasket seal of whole test, thereby further guaranteed the accuracy of test result.
Described electric heating mechanism comprises and is arranged on the heat-conducting plate on lifting mechanism top and is inlaid in the electric heating sheets in heat-conducting plate, fits in the bottom surface of the end face of heat-conducting plate and lower seal plate, and the center of heat-conducting plate end face offers an opening that part electric heating sheets can be exposed.Utilize the structure of electric heating sheets and opening heat conduction is set, simple in structure, it is convenient to control.
Described lifting mechanism is oil cylinder or cylinder.
In sum, the utility model not only can be convenient for people to evaluate the remaining load change under different time and temperature conditions, can utilize the gasket seal actual condition of simulation simultaneously, can conveniently to the sealing ability of pad, carry out quantitative test.In addition, the parameter by accumulation pad under varying environment, provides reliable data for forming gasket seal system, helps conversely designer to offer help in pad selection and the finite element analysis at Design Technology for Diesels initial stage.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail:
Fig. 1 is structural representation of the present utility model.
Embodiment
With reference to accompanying drawing, gasket seal RTA reliability test assembly of the present utility model comprises by base plate 1, top board 2 and is connected to the main body frame that pillar 3 between the two forms, in main body frame, be arranged at intervals with upper sealing panel 4 and the lower seal plate 5 of upper and lower correspondence, on upper sealing panel 4, be connected with pressure distribution unit 6, between pressure distribution unit 6 and top board 2, be connected with pressure transducer 7, the bottom of lower seal plate 5 is provided with electric heating mechanism, between electric heating mechanism and base plate 1, is connected with lifting mechanism 9.Wherein, lifting mechanism 9 is for adopting oil cylinder or cylinder.On upper sealing panel 4, by paracentral position, offering in medium through hole 10 and medium through hole 10 and be connected with medium ascending pipe 11, the center of upper sealing panel 4 bottom surfaces is provided with displacement transducer 13 is installed on temperature sensor 12, marginal position.The control end of the signal output part of pressure transducer 7, temperature sensor 12 and displacement transducer 13 and described electric heating mechanism and lifting mechanism 9 is all electrically connected on a control circuit.
With reference to accompanying drawing, the induction end of temperature sensor 12 leans out the bottom surface of upper sealing panel 4, and the end face of lower seal plate 8 offers deep gouge 14 on the position corresponding with temperature sensor 12.Deep gouge 14 is for holding the induction end of temperature sensor 12.In test, directly and medium contact, the actual applying working condition of more approaching and gasket seal 8, has guaranteed the accuracy of test result to the induction end of temperature sensor 12.
With reference to accompanying drawing, the marginal position of upper sealing panel 4 bottom surfaces offers groove 15, and displacement transducer 13 is arranged in groove 15.Displacement transducer for measure upper and lower seal pad spacing variable quantity, for fear of spacing is too small, displacement transducer is caused to damage, therefore, specially in the bottom surface of upper sealing panel 4, offer groove 15 and carry out installation position displacement sensor 13.
With reference to accompanying drawing, pressure distribution unit 6 comprises top board 61 and the vertical many connecting links 62 that are fixed between upper sealing panel 4 and top board 61 that are connected with pressure transducer 7 and be arranged in parallel with upper sealing panel 4, and the even spaced ring of above-mentioned each connecting link 62 is located at the edge, border of upper sealing panel 4 end faces.This kind of structure is set and can simulates the stressing conditions in flange connection, utilize the distribution of force of each coupling bolt in each connecting link 62 simulation flanges connections, make the more approaching practical service environment with gasket seal 8 of whole test, thereby further guaranteed the accuracy of test result.
With reference to accompanying drawing, electric heating mechanism comprises and is arranged on the heat-conducting plate 16 on lifting mechanism 9 tops and is inlaid in the electric heating sheets 17 in heat-conducting plate 16, the bottom surface laminating of the end face of heat-conducting plate 16 and lower seal plate 4, the center of heat-conducting plate 16 end faces offers an opening 18 that part electric heating sheets 17 can be exposed.Utilize the structure of electric heating sheets 17 and opening 18 heat conduction are set, simple in structure, it is convenient to control.
The utility model is in test, gasket seal 8 to be tested is placed on the middle part of lower seal plate 5, utilize lifting mechanism 9 to drive lower seal plate 5 to rise, lower seal plate 5 coordinates with upper sealing panel 4 gasket seal 8 compressions, at interior formation one closed cavity of gasket seal 8, by medium through hole 10 to injected media in this closed cavity, utilize electric heating mechanism to heat lower seal plate 5, thereby the actual work temperature of simulation gasket seal 8, utilize pressure transducer 7 and temperature sensor 12 can record respectively pressure and the working temperature of loading, utilize displacement transducer 13 can record the variation in thickness of gasket seal 8, thereby lifting mechanism 9 and electric heating mechanism are carried out to closed-loop control.The variation in thickness value signal of force value signal obtained above, temperature value signal and pad all sends to control circuit, and control circuit sends to computing machine by above-mentioned signal.Computing machine can, according to the reliability evaluation standard of gasket seal 8, carry out fail-safe analysis to gasket seal 8.
Visible, the utility model not only can be evaluated the remaining load change under different time and temperature conditions, can utilize the actual applying working condition of the gasket seal 8 of simulation simultaneously, and the sealing ability of pad is carried out to quantitative test.In addition, the parameter by accumulation pad under varying environment, provides reliable data for forming gasket seal system, helps conversely designer to offer help in pad selection and the finite element analysis at Design Technology for Diesels initial stage.
At present, to the evaluation of performance reliably and with long-term of gasket seal, be mainly to utilize EN1591 method in the world, the pad parameter obtaining by shorter pad test.In the method, spacer for bolt flange connects design except considering that conventional pad parameter is as minimal fitting gasket stress, minimum operation gasket stress, also related to the factors such as thermal expansion, creep, elastic modulus, these factors have been carried out to quantitatively characterizing simultaneously and finally determined 6 pad parameter: Q smax, Q min (L), Q smin (L), P qR, E g, α g.
Utilize the utility model can accurately obtain above-mentioned six pad parameters.Itemize the Q of three parameters wherein below smax, Q min (L)and Q smin (L)mensuration process.
(1) Q smaxthe mensuration of (maximum pad operational stresses induced)
First pad is loaded the initial pretightning force of 20MPa, after 5min, heat pad to desirable value, its heating rate remains on 2 ℃/min, reach temperature required after, keep 15min; Then carry out and load a unloading circulation, until collapse under pressure at some stress lower gaskets, this load is maximum functional gasket load, and in loading procedure, force value successively changes; During unloading, its magnitude of load should remain 1/3rd while loading.
In loading procedure, need to stipulate loading speed equally: the loading speed of removing PTFE material pad is 0.1MPa/s, and other types pad is 0.5MPa/s; And be loaded on after specified value, need to keep 5 minutes. at every turnIt is more than the acquisition process of maximum pad working stress.
(2) Q min (L)(minimum pad pretension stress) and Q smin (L)the mensuration of (minimum pad operational stresses induced)
The definite of this group pad parameter is by the mode of " loading a unloading " circulation, carries out slip test, to obtain
Gasket stress under corresponding tight grade, wherein tested media is helium, pressure is 40 bar.First pad is applied the load of l0MPa, keep load to slip to stablize and record, be then loaded on 20MPa, keep equally load stable to slip, then reduce load to l0MPa and measure slip; Then carrying out successively loading stress is that 40MPa, 60MPa, 80 MPa are until 160 MPa tests.
In test, from being loaded into of each step, measuring this process of slip approximately needs 2 hours, and the unloading of each step
Carry and measure and stablize the about needs of slip 5 hours, and certain loading speed is followed in the increase of load equally.
Due to different loaded cycle, under unloading condition, slip trend is also different; In fact, this trend is service state that is virtually reality like reality just, and unloading line provides the minimum gasket stress under the operation operating mode that meets certain requirements of tightness, and under room temperature environment, loaded line provides the stress of the assembling operating mode minimum pad sheet under certain slip.
In the utility model, the signal gathering for control circuit and the signal of transmission, only relate to two kinds of high level signal and low level signals, the corresponding switching two states that triggers relevant relay of these two kinds of level signals, utilize existing custom circuit structure to realize, do not relate to computer programming, of the present utility modelly focus on the physical construction of device and position and the annexation between each parts, rather than a kind of control circuit not more a kind of improvement of control method.
In sum, the utility model is not limited to above-mentioned embodiment.Those skilled in the art, not departing under the prerequisite of spirit and scope of the present utility model, can do some changes and modification.Protection domain of the present utility model should be as the criterion with claim of the present utility model.

Claims (6)

1. a gasket seal RTA reliability test assembly, comprise by base plate (1), top board (2) and be connected to the main body frame that pillar (3) between the two forms, it is characterized in that being arranged at intervals with in described main body frame upper sealing panel (4) and the lower seal plate (5) of upper and lower correspondence, on upper sealing panel (4), be connected with pressure distribution unit (6), between pressure distribution unit (6) and top board (2), be connected with pressure transducer (7), the bottom of lower seal plate (5) is provided with electric heating mechanism, is connected with lifting mechanism (9) between electric heating mechanism and base plate (1); Upper sealing panel (4) is upper to be offered in medium through hole (10) and medium through hole (10) and is being connected with medium ascending pipe (11) by paracentral position, and the center of upper sealing panel (4) bottom surface is provided with displacement transducer (13) is installed on temperature sensor (12), marginal position; The control end of the signal output part of described pressure transducer (7), temperature sensor (12) and displacement transducer (13) and described electric heating mechanism and lifting mechanism (9) is all electrically connected on a control circuit.
2. gasket seal RTA reliability test assembly as claimed in claim 1, it is characterized in that the induction end of described temperature sensor (12) leans out the bottom surface of upper sealing panel (4), the end face of lower seal plate (8) offers deep gouge (14) on the position corresponding with temperature sensor (12).
3. gasket seal RTA reliability test assembly as claimed in claim 1, is characterized in that the marginal position of described upper sealing panel (4) bottom surface offers groove (15), and displacement transducer (13) is arranged in groove (15).
4. gasket seal RTA reliability test assembly as claimed in claim 1, it is characterized in that described pressure distribution unit (6) comprises top board (61) and the vertical many connecting links (62) that are fixed between upper sealing panel (4) and top board (61) that are connected with pressure transducer (7) and be arranged in parallel with upper sealing panel (4), the even spaced ring of above-mentioned each connecting link (62) is located at the edge, border of upper sealing panel (4) end face.
5. gasket seal RTA reliability test assembly as claimed in claim 1, it is characterized in that described electric heating mechanism comprises is arranged on the heat-conducting plate (16) on lifting mechanism (9) top and is inlaid in the electric heating sheets (17) in heat-conducting plate (16), the bottom surface laminating of the end face of heat-conducting plate (16) and lower seal plate (4), the center of heat-conducting plate (16) end face offers an opening (18) that part electric heating sheets (17) can be exposed.
6. the gasket seal RTA reliability test assembly as described in any one in claim 1-5, is characterized in that described lifting mechanism (9) is oil cylinder or cylinder.
CN201420143181.9U 2014-03-27 2014-03-27 Reliability testing device of sealing gasket Expired - Fee Related CN203824720U (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
CN105547843A (en) * 2015-12-14 2016-05-04 潍柴动力股份有限公司 Testing apparatus and testing system of sealing components
CN108020265A (en) * 2017-12-11 2018-05-11 淮南师范学院 A kind of pressure test equipment with temperature measurement function
CN110553794A (en) * 2018-05-31 2019-12-10 威克拉公司 leak detection for heat exchanger plates
CN110940470A (en) * 2019-10-15 2020-03-31 西北工业大学 Rubber seal performance testing device

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104359635A (en) * 2014-11-24 2015-02-18 中国航空动力机械研究所 Multifunctional all-working-condition metal elastic sealing ring testing device
CN105547843A (en) * 2015-12-14 2016-05-04 潍柴动力股份有限公司 Testing apparatus and testing system of sealing components
CN105547843B (en) * 2015-12-14 2018-03-09 潍柴动力股份有限公司 A kind of experimental rig and pilot system for sealing parts
CN108020265A (en) * 2017-12-11 2018-05-11 淮南师范学院 A kind of pressure test equipment with temperature measurement function
CN110553794A (en) * 2018-05-31 2019-12-10 威克拉公司 leak detection for heat exchanger plates
US10914652B2 (en) 2018-05-31 2021-02-09 Wcr, Inc. Leak detection for heat exchanger plate
CN110940470A (en) * 2019-10-15 2020-03-31 西北工业大学 Rubber seal performance testing device

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20140910

Termination date: 20150327

EXPY Termination of patent right or utility model