CN203163968U - Non-metal O-shaped ring performance testing device - Google Patents
Non-metal O-shaped ring performance testing device Download PDFInfo
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- CN203163968U CN203163968U CN 201220499014 CN201220499014U CN203163968U CN 203163968 U CN203163968 U CN 203163968U CN 201220499014 CN201220499014 CN 201220499014 CN 201220499014 U CN201220499014 U CN 201220499014U CN 203163968 U CN203163968 U CN 203163968U
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Abstract
The utility model relates to a non-metal O-shaped ring performance testing device which can realize the friction performance and the stress relaxation performance of an O-shaped ring, and carries out seal performance determination on the O-shaped ring applied to mechanical seal dynamic and static rings. The device comprises an upper ring, a core passing pull rod, a core shaft, a middle ring, a lower ring, a force sensor, a connecting pull rod, a nut I, a differential screw, a drive sleeve, a fixation screw, a flange bracket, a stepper motor, a nut II, a barrel-shaped bracket, a bolt I, a bolt II, an O-shaped ring II, an O-shaped ring IV, a guide flat key I, a four-leg bracket, a bolt III, a key, a bolt IV, a bolt V, a guide flat key II, an O-shaped ring V and a cut-off valve. According to the device, an O-shaped ring groove is arranged on the middle ring; the influence of an axial additional force on the initial seal specific pressure of the O-shaped ring applied to a tested static ring, which is caused by the existence of the net area of the medium effect in a seal cavity in a medium loading process, is overcome; and the differential screw mechanism is used to carry out precise adjustment on an axial load, which ensures that the loading process of each O-shaped ring is stable.
Description
Technical field
The utility model belongs to nonmetal O shape circle technical field of performance test, the dynamic and static ring of mechanical seal frictional behaviour, sealing property and the stress relaxation ability proving installation of O shape circle that particularly relates to long-term operation.
Background technology
Nonmetal O shape circle is simple in structure because of it, mounting or dismounting are convenient, description of materials is many, with low cost, the kinetic friction resistance is less, size and all standardization of groove, interchangeability is strong, often be used to static sealing or the dynamic seal (packing) of various plant equipment, inside and outside leakage, the intrusion with liquid or gas medium of uniform temperature and pressure of the equipment that prevents.At present, on lathe, boats and ships, automobile, aerospace equipment, chemical machinery, engineering machinery, mining machinery, petroleum machinery and all kinds of instrument and meter, especially in hydraulic pressure and pneumatic actuator system, mechanical seal, widely applying various types of nonmetal seal with O ring elements.Along with the development of producing equipment technology, people have proposed new requirement to application parameter and the quality of nonmetal O shape circle.On the one hand, coming into operation of high parameter equipment needs the nonmetal O shape circle of high-performance long-term operation to guarantee as sealing; On the other hand, inefficacy or the damage of O shape circle, often causing device to leak can't operate as normal, cause material loss, energy dissipation, environmental pollution, even lead to fire, explode, jeopardize personal safety, most typical as on January 28th, 1986, the U.S. " challenger " number space shuttle causes leakage because of a seal with O ring inefficacy of rocket booster junction, left side, cause exploding soon after the space shuttle lift-off, 7 cosmonaut are all wrecked, cause tragedy maximum on the space flight history.
For this reason, people have carried out the research of nonmetal O shape circle performance and proving installation thereof at the demand of different operating modes.BJ University of Aeronautics ﹠ Astronautics has manufactured and designed an O shape circle load die-away test equipment when research seal with O ring load attenuation law; This equipment mainly comprises 3 parts: be used for compressing two blocks of circular aluminium sheets of O shape circle, for the S type power sensor of the compressive load of measuring O shape circle with for the spiral augmentor to O shape circle imposed load; During test, the O shape circle that test is placed between two blocks of circular aluminium sheets, encloses to certain decrement with screw rod compression O shape, by its compressive load of S type force sensor measuring over time, and by the computer recording measurement data that links to each other with each sensor.Tsing-Hua University etc. have carried out comparatively deep research to piston in the Hydraulic Power Transmission System and cylinder body with the reciprocation sealing performance of O shape circle, and designed proving installation comprises test cylinder (jar), line slideway, electronic cylinder, power sensor, displacement transducer and switch board; Test cylinder (jar) is provided with oil gas entrance, oil gas vent and 2 leakage holes.The medium cavity is made up of with the test circle 2 pistons of complete symmetry; The piston clearance is matched with on the piston drive axle, shaft shoulder location, nut lock, the purpose that adopts this structure are to be processed with the piston of different grooveds in order to change neatly, in order to test sealing property and the frictional behaviour of difform sealing ring (as O shape circle, Y shape circle).Beijing University of Chemical Technology has designed a cover for the test macro of measuring the auxiliary O shape circle of mechanical seal compensation mechanism friction force, and this test macro comprises test unit (comprising dielectric cavity, O shape circle, axle), sealing load source, to-and-fro movement system (comprising reciprocal hydraulic cylinder and control system), measuring system (comprising power sensor, data acquisition) and the control system (adopting NSTRON HF fatigue testing machine control system) etc. that test O shape is enclosed; Utilize this control system to realize the to-and-fro movement of O shape circle in dielectric cavity, and obtained the friction force of rubber o-ring under the water lubrication situation.
Present known technology shows that the research of O shape circle performance testing device relatively lags behind in the demand for development of industrial equipment, and the dynamic and static ring of mechanical seal is all the more so with the performance testing device of O shape circle.The deficiency of its existence mainly shows: in (1) medium loading procedure, the pressure medium that acts in the dielectric cavity exerts an influence for the initial sealing specific pressure of tested O shape circle; (2) failing to embody dynamic and static ring wearing and tearing back rotating ring encloses when servo-actuated with O shape and stationary ring encloses under the stress relaxation state separately sealing property with O shape; (3) the axial load loading of O shape circle is not steady, out of true; (4) be difficult to finish at a testing machine test of frictional behaviour, sealing property and the stress relaxation ability of O shape circle.
Dynamic and static ring is the auxiliary seal of mechanical seal with O shape circle, and its duty is similar to static seal, but its frictional behaviour is embodying the tracing ability of compensated loop, and its sealing property directly influences the overall sealing performance of mechanical seal; The characteristics that dynamic and static ring has itself with stress and the motion state of O shape circle, the O shape circle of stationary ring and stationary seat is four side pressurized, and rotating ring encloses with O shape between spool (or axle sleeve) and follows rotating ring, has fine motion.
Summary of the invention
Deficiency at said apparatus, and dynamic and static the ring stress of O shape circle and the characteristics of motion state, the utility model proposes a kind of nonmetal O shape circle performance testing device, measure with the sealing property of O shape circle with the dynamic and static ring of frictional behaviour, stress relaxation ability and mechanical seal of realizing O shape circle.
The purpose of this utility model is achieved in that
The nonmetal O shape circle of the utility model performance testing device, comprise ring, the punching pull bar, axle, middle ring, following ring, the power sensor, cylinder lever connecting rod, nut I, differential screw rod, box coupling, holding screw, flange bracket, stepper motor, nut II, cylindrical stent, bolt I, bolt II, O shape circle II, O shape circle IV, dive key I, four foot supports, bolt III, key, bolt IV, bolt V, dive key II, stop valve, it is characterized in that: go up ring, middle ring, following ring is by O shape circle II, O shape circle IV and bolt I connect into shell cavity, again with axle, tested O shape circle constitutes dielectric cavity; Punching pull bar, axle, power sensor, cylinder lever connecting rod, nut I, differential screw rod, nut II, box coupling, dive key I, dive key II, key, holding screw, stepper motor constitute axle axial displacement governor motion; Two sections screw threads screw with nut I and nut II respectively on the described differential screw rod, nut II maintains static, nut I under the drive of differential screw rod, can do axial at a slow speed or fast moving, and it is mobile in dielectric cavity to drive axle by cylinder lever connecting rod, power sensor, punching pull bar, the accurate control of center roller displacement and upper and lower translational speed when realizing the performance test of O shape circle.
In the above-mentioned axle axial displacement governor motion, nut I can only move axially after realizing circumferentially fixing with dive key II; The pitch of two sections screw threads that differential screw rod and nut I and nut II screw is respectively P1, P2, and P2＞P1, helix is dextrorotation, under the drive of stepper motor and box coupling, while rotating, moving axially, also drive nut I simultaneously and move axially; When stepper motor rotated counterclockwise (as figure) circle, differential screw rod moved down P2 with respect to nut II, and nut I is with respect to moving P1 on the differential screw rod, and then nut I moves down δ 1=P2-P1 with respect to nut II; When stepper motor clockwise rotated a circle, differential screw rod was with respect to moving P2 on the nut II, and nut I moves down P1 with respect to differential screw rod, and then nut I is with respect to having moved δ 1=P2-P1 on the nut II; Meanwhile, the power sensor that links to each other with nut I, and the punching pull bar, axle also moves down at a slow speed or on moved δ 1=P2-P1.
The thread pitch that differential screw rod and nut I screw is that P1, helix are left-handed, the thread pitch that screws with nut II is that P2, helix are dextrorotation, and P2＞P1, when stepper motor and box coupling drive differential screw rod and rotate counterclockwise a circle, differential screw rod moves down P2 with respect to nut II, nut I moves down P1 with respect to differential screw rod, and then nut I moves down δ 2=P2+P1 with respect to nut II; When stepper motor clockwise rotated a circle, differential screw rod was with respect to moving P2 on the nut II, and nut I is with respect to moving P1 on the differential screw rod, and then nut I is with respect to having moved δ 2=P2+P1 on the nut II; Meanwhile, the power sensor that links to each other with nut I, and the punching pull bar, axle also moves down fast or on moved δ 2=P2+P1.
Above-mentioned dielectric cavity, wherein Huan top, bottom are offered snap ring groove respectively, when O shape circle installation requirement is arranged, O shape is installed earlier encloses in snap ring groove, are connected the back with last ring, following ring again and form complete annular groove; In the middle part rotational symmetry of ring offer 2 diametric circular-shaped through-hole, the right side then be the medium inlet, a left side then is media outlet, then a stop valve is equipped with in the exit on a left side, 2 diametric circular-shaped through-hole and middle ring endoporus intersection offer and store the pendular ring groove; Last ring and down the ring left side offer 1 radially circular through hole that leaks separately, in radially circular through hole and ring and the ring endoporus intersection down of leaking, offer storage pendular ring groove.
Above-mentioned tested O-ring seals is O shape circle I and O shape circle III, in the ring groove that ring top, bottom and last ring and following ring are formed in being placed on respectively, the endoporus of O shape circle I and O shape circle III is close on the face of cylinder at axle middle part, constitutes O shape circle frictional behaviour test dielectric cavity.Owing to do not have vary in diameter at described dielectric cavity inner axis of heart, thereby axle can not produce additional axial force when dielectric cavity loads.Adopt differential screw rod top and middle part to be processed with the axle axial displacement governor motion of the screw thread that the helical rotation direction is identical, pitch is different, make axle axially mobile at a slow speed in tested O shape circle I, O shape circle III, O shape circle frictional behaviour under the test microinching, by to last ring and mouthful I that leaks hunting, mouthful measurement of II place leakage rate of leaking hunting of ring down, just can obtain the sealing property of different medium pressure lower O-shape ring I and O shape circle III; It is opposite to adopt differential screw rod top and middle part to be processed with the helical rotation direction, the axle axial displacement governor motion of the screw thread that pitch is different, can realize axle axial fast moving in tested O shape circle I, O shape circle III, frictional behaviour and the sealing property of the O shape circle I under the test rapid movement and O shape circle III; By the test of friction speed lower O-shape ring frictional behaviour and sealing property, the speed that just obtains is to the rule that influences of O shape circle frictional behaviour and sealing property.By the external diameter of change axle or the groove depth of middle ring upper shed annular groove, thereby change the precompressed shrinkage that tested O shape is enclosed, as preceding operation, just can obtain the precompressed shrinkage to the rule that influences of O shape circle frictional behaviour and sealing property.Because the gauge size of 2 tested O shape circles is identical, adopt the mean value of test value to characterize frictional behaviour and the sealing property that tested O shape is enclosed, reduced the randomness of O shape circle performance test, increased stability.
Above-mentioned tested O-ring seals is O shape circle I and O shape circle V, the ring groove on ring top in being placed on respectively, and by the shaft shoulder of axle lower end and in the annular groove that the supporting boss of ring bottom constitutes down, the endoporus of O shape circle I and O shape circle III is close to respectively on the face of cylinder different with the two sections diameters in bottom, axle middle part, constitutes the sealing property test dielectric cavity of O shape circle.O shape circle V is fully contacted with the shaft shoulder, then just do not change at described dielectric cavity inner axis of heart diameter, axle will can not produce additional axial force when dielectric cavity loads.It is identical to adopt differential screw rod top and middle part to be processed with the helical rotation direction, the axle axial displacement governor motion of the screw thread that pitch is different, realized O shape circle I (rotating ring encloses with O shape) small slip on axle, and the axle bottom shaft shoulder is pressed into or unclamps the trace adjusting of the axial displacement of O shape circle V (stationary ring encloses with O shape), the accurate control of the load of guarantee effect on O shape circle V.By the magnitude of load of regulating action on O shape circle V, measure its leakage rate from last ring and the following mouthful I that leaks hunting, mouthful II that leaks hunting that encircles, can obtain the sealing property of different medium pressure lower O-shape ring I and O shape circle V; The speed that moves up of control axle is consistent with mechanical seal end surface rubbing wear speed under the normal operating conditions, can record the sealing property under O shape circle I fine motion, the O shape circle II stress relaxation.By the external diameter of change axle or the groove depth of middle ring upper shed annular groove, change the precompressed shrinkage of tested O shape circle I, as preceding operation, just can obtain the precompressed shrinkage to the rule that influences of the sealing property of O shape circle I, thus rotating ring obtained in the different medium pressure with the best precompressed shrinkage of O shape circle.
Above-mentioned tested O-ring seals is O shape circle V, is placed in the annular groove that is made of the shaft shoulder of axle lower end and the supporting boss that encircles the bottom down, constitutes the stress relaxation test dielectric cavity of O shape circle.It is identical to adopt differential screw rod top and middle part to be processed with the helical rotation direction, the axle axial displacement governor motion of the screw thread that pitch is different, realized that the axle bottom shaft shoulder is pressed into or unclamps the trace adjusting of the axial displacement of O shape circle V (stationary ring encloses with O shape), the accurate control of the load of guarantee effect on O shape circle V.Feed the medium of different temperatures in dielectric cavity, record power sensor institute dynamometry just can record the stress relaxation Changing Pattern of the tested O shape circle V under the different temperatures over time.
Beneficial effect of the present invention
(1) device adopts on middle ring rather than in axle and offers the structure that O shape is enclosed annular groove, overcome in the medium loading procedure, the axial additional force that produces owing to the existence of medium effect net area in the dielectric cavity is to the influence of tested stationary ring with the initial sealing specific pressure of O shape circle;
(2) trace that adopts differential screw mechanism to carry out axial load is regulated, and has guaranteed that O shape circle loading procedure is steady, and load is accurate;
(3) rotational speed of control step motor makes axle to move on the mechanical seal end surface rate of wear under the normal operating conditions, realized rotating ring with O shape circle servo-actuated and stationary ring with the mensuration of sealing property separately under the O shape circle stress relaxation state;
(4) device adopts by last ring, middle ring, the dielectric cavity formed of ring, axle and O shape circle down, easily adorn readily removable, the replacing that has made things convenient for tested O shape to enclose;
(5) adopt two identical O shapes of size to enclose as test specimen, characterize slip and the friction force of tested O shape circle under this condition with both slips, the average of friction force, reduced randomness;
(6) apparatus function is complete.On a testing machine, can finish the test of frictional behaviour, sealing property and the stress relaxation ability of O shape circle.
(7) good economy performance.By the removable parts part, can carry out the performance test of different model O type circle.
Description of drawings
Fig. 1 is non-metallic O ring performance testing device synoptic diagram.
Fig. 2 is the position situation of nut I before differential screw rod (two sections screw threads are dextrorotation) is regulated at a slow speed.
Fig. 3 is the displacement situation that differential screw rod (two sections screw threads are dextrorotation) is regulated back nut I at a slow speed.
Fig. 4 is the position situation of nut I before differential screw rod (screw thread that screws with nut I is left-handed, and the screw thread that screws with nut II the is dextrorotation) quick adjustment.
Fig. 5 is the displacement situation of differential screw rod (screw thread that screws with nut I is left-handed, and the screw thread that screws with nut II is dextrorotation) quick adjustment back nut I.
Fig. 6 is the state of non-metallic O ring performance testing device test O shape circle frictional behaviour.
Fig. 7 is that non-metallic O ring performance testing device test mechanical seals the state that dynamic and static ring is used the seal with O ring performance.
Fig. 8 is the state of non-metallic O ring performance testing device test O shape circle stress relaxation ability.
Among each figure: the last ring of 1-; 2-punching pull bar; The 3-axle; Encircle among the 4-; Encircle under the 5-; 6-power sensor; The 7-cylinder lever connecting rod; 8-nut I; The differential screw rod of 9-; The 10-box coupling; The 11-holding screw; The 12-flange bracket; The 13-stepper motor; 14-nut II; The 15-cylindrical stent; 16-bolt I; 17-bolt II; 18-O shape circle I; 19-O shape circle II; 20-O shape circle III; 21-O shape circle IV; 22-dive key I; 23-four foot supports; 24-bolt III; The 25-key; 26-bolt IV; 27-bolt V; 28-dive key II; 29-O shape circle V; The 30-stop valve; The a-mouthful I that leaks hunting; The import of b-medium; The c-mouthful II that leaks hunting.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
Fig. 1 is non-metallic O ring performance testing device synoptic diagram.Nonmetal O shape circle performance testing device, by last ring 1, punching pull bar 2, axle 3, middle ring 4, under encircle 5, power sensor 6, cylinder lever connecting rod 7, nut I8, differential screw rod 9, box coupling 10, holding screw 11, flange bracket 12, stepper motor 13, nut II14, cylindrical stent 15, bolt I16, bolt II17, O shape circle II19, O shape circle IV21, dive key I22, four foot supports 23, bolt III24, key 25, bolt IV26, bolt V27, dive key II28, O shape circle V29, stop valve 30 parts such as grade are formed, last ring 1, under encircle 4 leak hunting respectively mouthful IIc and mouthful Ia that leak hunting, middle ring is gone up rotational symmetry and is provided with 2 diametric circular-shaped through-hole, right ports is medium import b, and the left side nose end connects stop valve 30; Last ring 1, middle ring 4, encircle 5 down and connect into integral body by O shape circle II19, O shape circle IV21 and bolt I16, constitute dielectric cavity with axle 3, tested O shape circle again, be supported on the cylindrical stent 15; On the bottom of cylindrical stent 15 and the platform that is placed on four foot supports 23 after flange bracket 12 is connected by bolt IV26 and fix with bolt III24; Punching pull bar 2 passes axle 3 and the center pit of ring 4 down, links to each other with power sensor 6 on being in cylindrical stent 15 axial lines; Power sensor 6 bottoms link to each other with nut I16 by cylinder lever connecting rod 7, the bottom of nut I8 links to each other with differential screw rod 9 tops, the middle part of differential screw rod 9 screws in nut II14, and the bottom of differential screw rod 9 (optical axis section) is connected with stepper motor 13 with key 25 by box coupling 10, dive key I22; The flange bracket of supporting stepper motor 13 is fixed in the bottom of cylindrical stent 15 by bolt IV26, and relies on flange bracket and bolt V27 tightening in the upper surface of four foot supports, 23 platforms.
Fig. 2 is the position situation of nut I before differential screw rod (two sections screw threads are dextrorotation) is regulated at a slow speed.
Fig. 3 is the displacement situation that differential screw rod (two sections screw threads are dextrorotation) is regulated back nut I at a slow speed.The pitch of two sections screw threads that screw with nut I8, nut II14 in the differential screw rod 9 is respectively P1=1.75mm, P2=2mm, helix is dextrorotation, when the differential screw rod 9 of stepper motor 13 drives clockwise rotates a circle, differential screw rod 9 is with respect to moving 2mm on the nut II14, nut I8 is with respect to moving 1.75mm on the differential screw rod 9, and then nut I8 is with respect to moving δ 1=2-1.75=0.25mm on the nut II28; Meanwhile, the power sensor 6 that links to each other with nut I8, and punching pull bar 2, axle 3 have also moved δ 1=2-1.75=0.25mm at a slow speed.
Fig. 4 is the position situation of nut I before differential screw rod (screw thread that screws with nut I is left-handed, and the screw thread that screws with nut II the is dextrorotation) quick adjustment.
Fig. 5 is the displacement situation of differential screw rod quick adjustment back nut I.Two sections screw threads that screw with nut I8, nut II14 in the differential screw rod 9 are respectively left-handed and during dextrorotation, its pitch is respectively P1=1.75mm, P2=2mm, stepper motor 13 drives differential screw rod 9 and rotates counterclockwise a circle, differential screw rod 9 moves 2mm in nut II14, nut I8 is along moving 1.75mm on the differential screw rod 9, with respect to fixed nut II14, moved δ ' on nut I8 is quick
1=2+1.75=3.75mm.
Fig. 6 is the state of non-metallic O ring performance testing device test O shape circle frictional behaviour.At nonmetal O shape circle performance testing device shown in Figure 1, back out bolt I16 and punching pull bar 2 earlier, ring 1, middle ring 4 and axle 3 in the dismounting, tested O shape circle III20 is sleeved on the axle 3 in advance, be placed on down on the upper surface of ring 5, again under encircle 5 stack in ring 4 and O shape circle IV21, make O shape circle III20 be in in the bottom annular groove of ring 4; Then, I18 is sleeved on the axle 3 again with O shape circle, and is positioned in the bottom annular groove of middle ring 4, lays O shape circle II19, covers ring 1, and I16 tights a bolt; Punching pull bar 2 is penetrated axle 3, be screwed in the upper end snail pit of power sensor 6.
The test(ing) medium of annotating from medium import b to dielectric cavity is opened stop valve 30 emptyings in dielectric cavity left side before the filling, treated to close when a little test(ing) medium flows out stop valve 30, and stop valve 30 outlets are connected to the backflow liquid reservoir of providing for oneself.Open stop valve 30, make the test(ing) medium circulation, guarantee pressure medium, temperature constant in the dielectric cavity.By adjusting the pressure and temperature of the medium that supplies, just can obtain the O shape circle working environment that needs.
Fig. 7 is that non-metallic O ring performance testing device test mechanical seals the state that dynamic and static ring is used the seal with O ring performance.At nonmetal O shape circle performance testing device shown in Figure 1, back out bolt I16 and punching bolt 2 earlier, ring 1, middle ring 4 and axle 3 in the dismounting, stationary ring is sleeved on the little axle head of axle 3 shaft shoulders with O shape circle V29, put into down on the supporting boss of ring 5 bottoms, namely be mounted in the annular groove that is constituted by the little axle head of the shaft shoulder, axle of axle 3 bottoms and the supporting boss that encircles 5 bottoms down.Under encircle 5 stack in ring 4, and with rotating ring with O shape circle I18 cover install to advance on the axle 3 in the annular groove of ring 4 upper end open, cover and encircle 1, the I16 that tights a bolt tightens punching pull bar 2 again.
Starting stepper motor 13 makes it to turn right, the moment of torsion of stepper motor 13 passes to differential screw rod 9 by box coupling 10, the middle part of ordering about differential screw rod 9 screws among the nut I8 that is fixed on the cylindrical stent 15 also to be moved vertically, simultaneously, differential screw rod 9 tops screw among the nut II14, order about it and axially move down along dive key II28.The helical rotation direction is identical because the pitch of differential screw rod 9 top screw threads and middle part screw thread is different, self rising displacement is different with the displacement that nut II14 descends when causing differential screw rod 9 to rotate a circle, when two pitch approach and the pitch of nut II14 during greater than the pitch of nut I8, the overall displacements trace of nut II14 descends.The overall displacements of nut II14 is by cylinder lever connecting rod 7 drive sensors 6, and is drop-down by axle 3 again, strengthens the axial load of tested O shape circle V29 slightly; Equally, stepper motor 13 is turned left, then reduce the axial load of tested O shape circle V29 slightly.Running stepper motor 13, and observation sensor 6 displayed values make tested O shape circle V29 obtain predetermined axial load.
As previously mentioned to the test(ing) medium of dielectric cavity filling certain pressure and temperature.The leaking medium that leak hunting in stipulated time in the test process a mouthful I a, II c are collected is measured the slip separately that just can obtain tested O shape circle I18 and O shape circle V29.
By the rotating speed of control step motor 6, make axle 3 on to move speed consistent with mechanical seal end surface rubbing wear speed, then can record the sealing property under O shape circle I18 fine motion, the O shape circle II20 stress relaxation.
Fig. 8 is the state of non-metallic O ring performance testing device test O shape circle stress relaxation ability.Back out punching pull bar 2, take out axle 3, the shaft shoulder path place with tested O shape circle V29 is set in axle 3 puts into down on the boss of ring 5 again; Screw back punching pull bar 2 to power sensor 6; Start stepper motor 13, make axle 3 follow punching pull bar 2 under the drive of nut I8, slowly move down, when power sensor 6 displayed values reach predetermined value, close stepper motor 13; Record power sensor 6 displayed values namely obtain the stress relaxation ability of tested O shape circle V29 over time; If will add test(ing) medium from the medium import, and stop valve 30 outlets are connected to the backflow liquid reservoir.Open stop valve 30, make the test(ing) medium circulation, guarantee that medium temperature is constant in the dielectric cavity, 6 dynamometry of record power sensor just can record the stress relaxation Changing Pattern of the tested O shape circle V29 under the different temperatures over time.
Claims (6)
1. nonmetal O shape circle performance testing device comprises ring (1), punching pull bar (2), axle (3), middle ring (4), following ring (5), power sensor (6), cylinder lever connecting rod (7), nut I (8), differential screw rod (9), box coupling (10), holding screw (11), flange bracket (12), stepper motor (13), nut II (14), cylindrical stent (15), bolt I (16), bolt II (17), O shape circle I (18), O shape circle II (19), O shape circle III (20), O shape circle IV (21), dive key I (22), four foot supports (23), bolt III (24), key (25), bolt IV (26), bolt V (27), dive key II (28), O shape circle V (29), stop valve (30); It is characterized in that: go up ring (1), middle ring (4), ring (5) connects into shell cavity by O shape circle II (19), O shape circle IV (21) and bolt I (16) down, enclose the formation dielectric cavity with axle (3), tested O shape again; Punching pull bar (2), axle (3), power sensor (6), cylinder lever connecting rod (7), nut I (8), differential screw rod (9), nut II (14), box coupling (10), dive key I (22), dive key II (28), key (25), holding screw (11), stepper motor (13) constitutes axle axial displacement governor motion, the last two sections screw threads of described differential screw rod (9) screw with nut I (8) and nut II (14) respectively, nut II (14) maintains static, nut I (8) under the drive of differential screw rod (9), can do axial at a slow speed or fast moving, and by cylinder lever connecting rod (7), power sensor (6), it is mobile in dielectric cavity that punching pull bar (2) drives axle (3), center roller (3) displacement and move up and down the accurate control of speed when realizing the performance test of O shape circle.
2. nonmetal O shape as claimed in claim 1 is enclosed performance testing device, it is characterized in that: differential screw rod (9) is gone up and the pitch of two sections screw threads that nut I and nut II screw is respectively P1, P2, and p2＞P1, helix is dextrorotation, when stepper motor (13) drove differential screw rod (9) counterclockwise or clockwise rotates a circle, nut I (8) was with respect to nut II (14) mobile δ 1=P2-P1 at a slow speed downward or upward; Two sections screw threads that screw with nut I (8), nut II (14) in the differential screw rod (9) are respectively that pitch is that left-handed twist and the pitch of P1 is the right-hand helix of P2, and P2＞P1, when stepper motor (13) drove differential screw rod (9) counterclockwise or clockwise rotates a circle, nut I (8) was with respect to nut II (14) fast moving δ 2=P2+P1 downward or upward.
3. nonmetal O shape as claimed in claim 1 is enclosed performance testing device, it is characterized in that: top, the bottom of middle ring (4) are offered snap ring groove respectively, when O shape circle installation requirement is arranged, O shape is installed earlier encloses in snap ring groove, be connected the back with last ring (1), following ring (5) again and form complete annular groove; The middle part rotational symmetry of middle ring (4) is offered 2 diametric circular-shaped through-hole, and the right side then is the medium inlet, and a left side then is media outlet, and then a stop valve (30) is equipped with in the exit on a left side, and 2 diametric circular-shaped through-hole and middle ring (4) endoporus intersection offer storage pendular ring groove; Last ring (1) and down ring (5) left side offer 1 radially circular through hole that leaks separately, in radially circular through hole and ring (1) and ring (5) endoporus intersection down of leaking, offer and store the pendular ring groove.
4. nonmetal O shape as claimed in claim 1 is enclosed performance testing device, it is characterized in that: tested O shape circle I (18), O shape circle III (20) is placed on middle ring (4) top respectively and last ring (1), middle ring (4) bottom are encircled in the ring groove of (5) forming with following, the endoporus of O shape circle I (18) and O shape circle III (20) is close on the face of cylinder at axle middle part, constitutes O shape circle frictional behaviour test dielectric cavity.
5. nonmetal O shape as claimed in claim 1 is enclosed performance testing device, it is characterized in that: the ring groove that tested O shape circle I (18), O shape circle V (29) are placed on middle ring (4) top respectively, and by the shaft shoulder of axle (3) bottom and in the annular groove that the supporting boss of ring (5) bottom constitutes down, the endoporus of O shape circle I (18) and O shape circle V (29) is close to respectively on the face of cylinder different with the two sections diameters in bottom, axle (3) middle part, constitutes the sealing property test dielectric cavity of O shape circle.
6. nonmetal O shape as claimed in claim 1 is enclosed performance testing device, it is characterized in that: tested O shape circle V (29) is placed in the annular groove that is made of the shaft shoulder of axle (3) lower end and the supporting boss that encircles (5) bottom down, constitutes the stress relaxation test dielectric cavity of O shape circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220499014 CN203163968U (en) | 2012-09-28 | 2012-09-28 | Non-metal O-shaped ring performance testing device |
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| CN 201220499014 CN203163968U (en) | 2012-09-28 | 2012-09-28 | Non-metal O-shaped ring performance testing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879189A (en) * | 2012-09-28 | 2013-01-16 | 南京林业大学 | Non-metallic O-shaped ring performance testing device |
| CN106706220A (en) * | 2017-01-12 | 2017-05-24 | 华南理工大学 | Test device for sealing property of rubber O-shaped ring under high pressure hydrogen environment |
| CN109632287A (en) * | 2018-12-13 | 2019-04-16 | 西安航天动力研究所 | A kind of radial seal frictional force-sealing property detection device |
| CN110031210A (en) * | 2019-04-16 | 2019-07-19 | 青岛小海智能科技有限公司 | A kind of the fatigue property test device and application method of crawler belt sealing ring |
-
2012
- 2012-09-28 CN CN 201220499014 patent/CN203163968U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102879189A (en) * | 2012-09-28 | 2013-01-16 | 南京林业大学 | Non-metallic O-shaped ring performance testing device |
| CN102879189B (en) * | 2012-09-28 | 2014-11-12 | 南京林业大学 | Non-metallic O-shaped ring performance testing device |
| CN106706220A (en) * | 2017-01-12 | 2017-05-24 | 华南理工大学 | Test device for sealing property of rubber O-shaped ring under high pressure hydrogen environment |
| CN106706220B (en) * | 2017-01-12 | 2023-03-21 | 华南理工大学 | Device for testing sealing performance of rubber O-shaped ring in high-pressure hydrogen environment |
| CN109632287A (en) * | 2018-12-13 | 2019-04-16 | 西安航天动力研究所 | A kind of radial seal frictional force-sealing property detection device |
| CN110031210A (en) * | 2019-04-16 | 2019-07-19 | 青岛小海智能科技有限公司 | A kind of the fatigue property test device and application method of crawler belt sealing ring |
| CN110031210B (en) * | 2019-04-16 | 2021-01-05 | 青岛小海智能科技有限公司 | Fatigue performance testing device for track sealing ring and using method |
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