CN106353080A - Experimental device and experimental method for linear dynamic sealing characteristics of sealing rings - Google Patents

Experimental device and experimental method for linear dynamic sealing characteristics of sealing rings Download PDF

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Publication number
CN106353080A
CN106353080A CN201610769196.XA CN201610769196A CN106353080A CN 106353080 A CN106353080 A CN 106353080A CN 201610769196 A CN201610769196 A CN 201610769196A CN 106353080 A CN106353080 A CN 106353080A
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China
Prior art keywords
sealing ring
cavity volume
sleeve assembly
pressure
liquid
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CN201610769196.XA
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CN106353080B (en
Inventor
杨友胜
李洋
司传岭
陈宇琪
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Ocean University of China
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Ocean University of China
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00Testing of machine parts
    • G01M13/005Sealing rings
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N19/00Investigating materials by mechanical methods

Abstract

The invention discloses an experimental device and an experimental method for linear dynamic sealing characteristics of sealing rings. The experimental device comprises a base, wherein a rodless cylinder is mounted on the base, a shaft is arranged at the top of the rodless cylinder and sleeved with a sleeve assembly, and the bottom of the sleeve assembly is fixedly connected with a slider on the rodless cylinder; three sealing ring mounting parts are arranged in the sleeve assembly along the shaft at intervals, the sealing rings are mounted in the sealing ring mounting parts and can reciprocate with the sleeve assembly along the shaft, an accommodating cavity penetrated by the shaft is formed between every two adjacent sealing ring mounting parts in the sleeve assembly, and a pressure regulating device and a pressure sensor are also mounted on the surface of the sleeve assembly. According to the experimental device for linear dynamic sealing characteristics of the sealing rings, the slider of the rodless cylinder drives the sleeve assembly to reciprocate along the shaft, the working state of the sealing rings during linear reciprocation can be simulated after the sealing rings are mounted at the mounting parts, the sealing rings and the shaft form friction pairs in the process, and the friction characteristics of the sealing rings can be experimented.

Description

A kind of sealing ring straight line dynamic sealing characteristic experimental apparatus and experimental technique
Technical field
The invention belongs to experiment test device field, particularly to one of this field sealing ring straight line dynamic sealing characteristic Experimental provision and experimental technique.
Background technology
The frictional behavior of sealing ring had both depended on the property of sealing ring itself, depended on its working condition again.Therefore, exist It is ensured that experiment condition is critically important during the frictional behavior of research sealing ring.Sealing ring frictional experiment device, it is necessary to assure groove Size, sliding speed, pressure, the medium of friction pair.However, existing major part experimental provision is (including frictional force meter and end Face strigil) all can not meet above-mentioned to sealing ring frictional experiment proposed requirement.
As tested in actual machine or on model, and it is not widely practiced in various works because error is big Sealing ring frictional behavior under the conditions of work is furtherd investigate.
Straight line dynamic sealing experiment of friction performance device of the prior art is as shown in figure 1, this kind of device can only measure sealing Circle bear dynamic friction characteristic during pressure at one end it is impossible to measure sealing ring two ends all bear pressure (same to high pressure, same to low pressure, One end low pressure one end high pressure) when dynamic friction characteristic.
Content of the invention
The technical problem to be solved is exactly to provide one kind can be to carrying out linear reciprocation movement in hydraulic means Sealing ring carry out experimental provision and the experimental technique of frictional behavior experiment.
The present invention adopts the following technical scheme that
A kind of sealing ring straight line dynamic sealing characteristic experimental apparatus, it thes improvement is that: described experimental provision includes base, bottom Rodless cylinder is installed on seat, an axle is arranged at the top of Rodless cylinder, and one end of this axle is passed through pull pressure sensor and is fixed on base On bearing be connected, the other end is connected with the support being fixed on base, and axle is set with a sleeve assembly, described sleeve The bottom of assembly is fixedly connected with the slide block on Rodless cylinder;Install along three sealing rings of axle interval setting inside sleeve assembly Portion, sealing ring can move back and forth along axle with sleeve assembly, also adjacent two inside sleeve assembly after loading sealing ring installation portion One cavity volume being passed through by axle is respectively set between sealing ring installation portion, and described cavity volume is each and a fluid injection on sleeve assembly surface Mouth communicates, and described sleeve assembly surface is also equipped with two regulators and two pressure transducers, each regulator All communicate with a cavity volume to adjust the liquid pressure in this cavity volume, each pressure transducer is all passed to a cavity volume phase Just monitor the liquid pressure in this cavity volume, base is also installed the displacement transducer for measuring set of cylinder assembly displacement.
Further, described Rodless cylinder provides power by air pump.
Further, described liquid injection port is connected with hydraulic pump by pipeline.
Further, described pull pressure sensor and displacement transducer are all electrically connected with display.
Further, described regulator includes the valve body with cavity, and valve body is communicated with cavity volume by valve port, and valve body is empty Intracavity arranges Rectangular Spring, and one end of this Rectangular Spring is connected with valve element, and the protuberance of described valve element stretches in valve port, and It is provided with sealing ring between valve element protuberance and valve port, the other end of Rectangular Spring is then connected with spring base, and be arranged on The threaded adjusting screw rod of locking nut on valve body may be inserted in cavity and push against spring base, rotates adjusting screw rod permissible Change the decrement of Rectangular Spring by spring base.
Further, described valve body installs lid, on this, one end of lid is inserted in the cavity of valve body, above covers installation Locking nut, the adjusting screw rod threadeded with locking nut passes through above-mentioned upper lid to insert in the cavity of valve body and push against spring Seat.
Further, it is additionally provided with packing ring between valve element protuberance and valve port, and the position phase of packing ring and sealing ring Adjacent.
A kind of sealing ring straight line dynamic sealing characteristic test method, using above-mentioned sealing ring straight line dynamic sealing characteristic test dress Put, it thes improvement is that, comprise the steps:
In (1) three sealing ring installation portion, two ends for a sealing ring installation portion and c sealing ring installation portion, seal for b between a, c Circle installation portion, is the first cavity volume between a, b, is the second cavity volume between b, c;
(2) open air pump and run offer power for Rodless cylinder, make the slide block of Rodless cylinder drive sleeve assembly back and forth to transport along axle Dynamic, after the liquid injection port of hydraulic pump connection simultaneously, small-power operates to cavity volume aerofluxuss, discharges and hold while sleeve assembly moves back and forth The air of intracavity, after the air emptying in cavity volume, closes air pump and hydraulic pump;Can also be in a, after c installs sealing ring, hydraulic pressure Pump is pressed to the first cavity volume by the liquid injection port being communicated with the first cavity volume, from the liquid injection port aerofluxuss communicating with the second cavity volume, is holding After the air emptying of intracavity, close air pump and hydraulic pump;
(3) when the liquid pressure in the first cavity volume is equal to the liquid pressure p in the second cavity volume:
(31) in a and c, sealing ring is installed, b does not first install sealing ring;
(32) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure be p and maintain stable after close hydraulic pump, start displacement transducer and pull pressure sensor, opening air pump makes no The slide block of bar cylinder drives sleeve assembly to move back and forth along axle, takes once for reciprocal three times after sleeve assembly movement velocity v is stable Pull pressure sensor registration f, now f is equal to resistance sum suffered by sealing ring at a, c, because at a, c, environment is the same, resistance fa= fc
(33) close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve assembly wiped clean, installing in b needs Sealing ring to be tested, a and c keeps constant;Open hydraulic pump and pressurize into cavity volume and note the liquid of same pressure p, start displacement Sensor and pull pressure sensor, opening air pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, treats sleeve Component movement rate v is stably rear to take pull pressure sensor registration f1 reciprocal three times, sealing ring friction f at bb=f1- F, record analyses p, v, fbBetween contact;
(34) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (31)-(33);
(35) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (31)-(34);
(4) when the liquid pressure in the first cavity volume is not equal to the liquid pressure in the second cavity volume, high pressure p1, low pressure p2:
(41) in a and c, sealing ring is installed, b does not first install sealing ring;
(42) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to low pressure p2 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f1, now f1 is equal to resistance sum f1=f suffered by sealing ring at a, ca+fc, due to ring at a, c Border is the same, resistance fa=fc, therefore f1=2fc, close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve group Part wiped clean;
(43) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to high pressure p1 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f2, now f2 is equal to resistance sum f2=f suffered by sealing ring at a, ca+fc, due to ring at a, c Border is the same, resistance fa=fc, therefore f2=2fa, close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve group Part wiped clean;
(44) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, first In cavity volume liquid pressure to high pressure p1 and maintain in stable, the second cavity volume liquid pressure to low pressure p2 and maintain stable after close liquid Press pump, starts displacement transducer and pull pressure sensor, and opening air pump makes the slide block of Rodless cylinder drive sleeve assembly past along axle Multiple motion, takes pull pressure sensor registration f3 reciprocal three times, due to environment at a after sleeve assembly movement velocity v is stable As step (43), at c, equally, f3 is equal to resistance suffered by sealing ring at a, c with suffered by sealing ring at b for environment and step (42) Frictional force sum, i.e. f3=fa+ fc+fb= fb+ 1/2f1+1/2f2, fb=f3-1/2f1-1/2f2, record analyses p1, p2, v, fbBetween contact;
(45) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (41)-(44);
(46) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (41)-(45).
Further, the span of liquid pressure p is 0 20mpa.
Further, the pressure differential range in liquid pressure mesohigh p1 and low pressure p2 is 02 mpa.
Further, described liquid can be sea water, fresh water or hydraulic oil.
The invention has the beneficial effects as follows:
Sealing ring straight line dynamic sealing characteristic experimental apparatus disclosed in this invention, the slide block of Rodless cylinder drives sleeve assembly along axle Move back and forth, sealing ring is attached to after b sealing ring installation portion, you can work shape when simulation sealing ring linear reciprocation is mobile State, sealing ring and axle constitute friction pair in the process, you can the frictional behavior of sealing ring is tested.In sealing ring straight line In reciprocating movement, sealing ring institute in the state of certain pressure and speed is calculated by the registration of pull pressure sensor The frictional force being subject to, to analyze different in speed same pressure differential or pressure reduction identical speed different situations lower seal friction with this Characteristic.
Sealing ring straight line dynamic sealing characteristic experimental apparatus disclosed in this invention, adjust sleeve assembly by Rodless cylinder Translational speed v, and can need to inject the liquid of corresponding pressure p, liquid pressure p in the first cavity volume and the second cavity volume according to experiment Can be monitored by being arranged on the pressure transducer on sleeve assembly surface.
Sealing ring straight line dynamic sealing characteristic test method disclosed in this invention, using above-mentioned sealing ring straight line dynamic sealing Characteristic experimental apparatus, easy to operate, error little in that context it may be convenient to experimentation is carried out to the frictional behavior of sealing ring.
Brief description
Fig. 1 is the structural representation of straight line dynamic sealing experiment of friction performance device of the prior art;
Fig. 2 is the structural representation of the experimental provision disclosed in the embodiment of the present invention 1;
Fig. 3 is the structural representation of the experimental provision middle sleeve assembly disclosed in the embodiment of the present invention 1;
Fig. 4 is the structural representation of regulator in experimental provision disclosed in the embodiment of the present invention 1.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with drawings and Examples, right The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only in order to explain the present invention, and It is not used in the restriction present invention.
Embodiment 1, as shown in Fig. 2 present embodiment discloses a kind of sealing ring straight line dynamic sealing characteristic experimental apparatus, described Experimental provision include base 9, on base 9 install Rodless cylinder 12, an axle 7, one end of this axle 7 are arranged at the top of Rodless cylinder 12 It is connected with the bearing 10 being fixed on base 9 by pull pressure sensor 2, the other end and support 8 phase being fixed on base 9 Connect, axle 7 is set with a sleeve assembly 6, the bottom of described sleeve assembly 6 is fixing even with the slide block 11 on Rodless cylinder 12 Connect;As shown in figure 3, along three sealing ring installation portion a of axle 7 interval setting, b, c inside sleeve assembly 6, sealing ring loads sealing Circle installation portion after can move back and forth along axle 7 with sleeve assembly 6, inside sleeve assembly 6 also two adjacent sealing ring installation portions it Between cavity volume d, an e being passed through by axle 7 is respectively set, described cavity volume is respectively communicated with a liquid injection port 4 on sleeve assembly surface, institute The sleeve assembly surface stated is also equipped with two regulators 5 and two pressure transducers 3, and each regulator 5 is all with one Individual cavity volume communicates to adjust the liquid pressure in this cavity volume, and each pressure transducer 3 is all communicated to supervise with a cavity volume Survey the liquid pressure in this cavity volume, base 9 is also installed the displacement transducer 1 for measuring set of cylinder assembly 6 displacement.
Sealing ring straight line dynamic sealing characteristic experimental apparatus disclosed in the present embodiment, the slide block band moving sleeve group of Rodless cylinder Part moves back and forth along axle, and sealing ring is attached to after b sealing ring installation portion, you can work when simulation sealing ring linear reciprocation is mobile Make state, sealing ring and axle constitute friction pair in the process, you can the frictional behavior of sealing ring is tested.In sealing ring In linear reciprocation moving process, the state in certain pressure and speed for the sealing ring is calculated by the registration of pull pressure sensor Lower suffered frictional force, to be analyzed different or pressure reduction identical speed different situations lower seal in speed same pressure differential with this Frictional behavior.
Alternatively, in the present embodiment, described Rodless cylinder provides power by air pump.Described Liquid injection port be connected with hydraulic pump by pipeline.Described pull pressure sensor and displacement transducer are all electrically connected with display Connect.
As shown in figure 4, described regulator 5 includes the valve body 51 with cavity, valve body 51 passes through valve port 52 and cavity volume phase Logical, setting Rectangular Spring 53 in valve cavity, one end of this Rectangular Spring 53 is connected with valve element 54, the protrusion of described valve element 54 Portion stretches in valve port 52, and is provided with sealing ring 55, the other end of Rectangular Spring 53 between valve element protuberance and valve port 52 Then it is connected with spring base 56, the adjusting screw rod 58 threadeded with the locking nut 57 being arranged on valve body 51 may be inserted into sky Intracavity simultaneously pushes against spring base 56, rotates the decrement that adjusting screw rod 58 can change Rectangular Spring 53 by spring base 56.Described Valve body 51 on install lid 59, on this lid 59 one end insert valve body 51 cavity in, upper lid 59 on installation locking nut 57, The adjusting screw rod 58 threadeded with locking nut 57 passes through above-mentioned upper lid 59 to insert in the cavity of valve body 51 and push against spring Seat 56.It is additionally provided with packing ring 510 between valve element 54 protuberance and valve port 52, and the position phase of packing ring 510 and sealing ring 55 Adjacent.
The voltage-regulation principle of regulator is: the decrement of Rectangular Spring is adjusted with screwing out by the precession of adjusting screw rod, Rectangular Spring compresses valve element, produces certain pressure to holding intracavity liquid, thus controlling the pressure holding intracavity liquid.
The present embodiment also discloses a kind of sealing ring straight line dynamic sealing characteristic test method, using above-mentioned sealing ring straight line Dynamic sealing characteristic experimental apparatus, comprise the steps:
In (1) three sealing ring installation portion, two ends for a sealing ring installation portion and c sealing ring installation portion, seal for b between a, c Circle installation portion, is the first cavity volume d between a, b, is the second cavity volume e between b, c;
(2) open air pump and run offer power for Rodless cylinder, make the slide block of Rodless cylinder drive sleeve assembly back and forth to transport along axle Dynamic, after the liquid injection port of hydraulic pump connection simultaneously, small-power operates to cavity volume aerofluxuss, discharges and hold while sleeve assembly moves back and forth The air of intracavity, after the air emptying in cavity volume (about 8 ~ 9 seconds), closes air pump and hydraulic pump;Can also be in a, c installs sealing After circle, hydraulic pump is pressed to the first cavity volume d by the liquid injection port being communicated with the first cavity volume d, from the fluid injection communicating with the second cavity volume e Mouth aerofluxuss, after the air emptying in cavity volume (about 6 ~ 7 seconds), close air pump and hydraulic pump;
(3) when the liquid pressure in the first cavity volume d is equal to the liquid pressure p in the second cavity volume e:
(31) in a and c, sealing ring is installed, b does not first install sealing ring;
(32) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure be p and maintain stable after close hydraulic pump, start displacement transducer and pull pressure sensor, opening air pump makes no The slide block of bar cylinder drives sleeve assembly to move back and forth along axle, takes once for reciprocal three times after sleeve assembly movement velocity v is stable Pull pressure sensor registration f, now f(take the meansigma methodss after more than six times registrations) be equal to a, c at resistance sum suffered by sealing ring, Because at a, c, environment is the same, resistance fa=fc
(33) close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve assembly wiped clean, installing in b needs Sealing ring to be tested, a and c keeps constant;Open hydraulic pump and pressurize into cavity volume and note the liquid of same pressure p, start displacement Sensor and pull pressure sensor, opening air pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, treats sleeve Component movement rate v is stably rear to take pull pressure sensor registration f1 reciprocal three times, sealing ring friction f at bb=f1- F, wherein f1 are the meansigma methodss after taking more than six times registrations, record analyses p, v, fbBetween contact;
(34) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (31)-(33);
(35) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (31)-(34);
(4) when the liquid pressure in the first cavity volume d is not equal to the liquid pressure in the second cavity volume e, high pressure p1, low pressure p2:
(41) in a and c, sealing ring is installed, b does not first install sealing ring;
(42) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to low pressure p2 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f1, now f1(takes the meansigma methodss after more than six times registrations) it is equal to suffered by sealing ring at a, c Resistance sum f1=fa+fc, because at a, c, environment is the same, resistance fa=fc, therefore f1=2fc, close air pump, discharge and hold intraluminal fluid Body, pulls down sleeve assembly, by axle and sleeve assembly wiped clean;
(43) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to high pressure p1 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f2, now f2(takes the meansigma methodss after more than six times registrations) it is equal to suffered by sealing ring at a, c Resistance sum f2=fa+fc, because at a, c, environment is the same, resistance fa=fc, therefore f2=2fa, close air pump, discharge and hold intraluminal fluid Body, pulls down sleeve assembly, by axle and sleeve assembly wiped clean;
(44) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, first In cavity volume d liquid pressure to high pressure p1 and maintain in stable, the second cavity volume e liquid pressure to low pressure p2 and maintain stable after close Hydraulic pump, starts displacement transducer and pull pressure sensor, and opening air pump makes the slide block of Rodless cylinder drive sleeve assembly along axle Move back and forth, take pull pressure sensor registration f3 reciprocal three times after sleeve assembly movement velocity v is stable, due to ring at a Border as step (43), at c environment and step (42) equally, f3 be equal to a, c at resistance suffered by sealing ring with sealing ring institute at b By frictional force sum, i.e. f3=fa+ fc+fb= fb+ 1/2f1+1/2f2, wherein f3 are the meansigma methodss after taking more than six times registrations, fb=f3-1/2f1-1/2f2, record analyses p1, p2, v, fbBetween contact;
(45) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (41)-(44);
(46) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (41)-(45).
Alternatively, in the present embodiment, the span of liquid pressure p is 0 20mpa.? The pressure differential range of liquid pressure mesohigh p1 and low pressure p2 is 02 mpa.Described liquid can be sea water, fresh water or liquid Force feed.
After single analysis, disposal data, take rationally serial v, p, f, s data separate mapping software to draw frictional behavior Figure (v-f, p-f, s-f), respective function expression formula is found out in examination, and the function expression of gained can be using the reality disclosed in the present embodiment Experiment device and experimental technique are verified.
After experiment finishes, close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, axle is wiped with sleeve assembly Only.

Claims (11)

1. a kind of sealing ring straight line dynamic sealing characteristic experimental apparatus it is characterised in that: described experimental provision includes base, base Upper installation Rodless cylinder, an axle is arranged at the top of Rodless cylinder, and one end of this axle is passed through pull pressure sensor and is fixed on base Bearing be connected, the other end is connected with the support being fixed on base, and axle is set with a sleeve assembly, described sleeve group The bottom of part is fixedly connected with the slide block on Rodless cylinder;Install along three sealing rings of axle interval setting inside sleeve assembly Portion, sealing ring can move back and forth along axle with sleeve assembly, also adjacent two inside sleeve assembly after loading sealing ring installation portion One cavity volume being passed through by axle is respectively set between sealing ring installation portion, and described cavity volume is each and a fluid injection on sleeve assembly surface Mouth communicates, and described sleeve assembly surface is also equipped with two regulators and two pressure transducers, each regulator All communicate with a cavity volume to adjust the liquid pressure in this cavity volume, each pressure transducer is all passed to a cavity volume phase Just monitor the liquid pressure in this cavity volume, base is also installed the displacement transducer for measuring set of cylinder assembly displacement.
2. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 1 it is characterised in that: described no bar gas Cylinder provides power by air pump.
3. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 1 it is characterised in that: described liquid injection port It is connected with hydraulic pump by pipeline.
4. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 1 it is characterised in that: described pressure Sensor and displacement transducer are all electrically connected with display.
5. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 1 it is characterised in that: described pressure regulation dress Put including the valve body with cavity, valve body is communicated with cavity volume by valve port, setting Rectangular Spring in valve cavity, this Rectangular Spring One end is connected with valve element, and the protuberance of described valve element stretches in valve port, and is provided between valve element protuberance and valve port Sealing ring, the other end of Rectangular Spring is then connected with spring base, the tune threadeded with the locking nut being arranged on valve body Section screw rod may be inserted in cavity and push against spring base, rotates the compression that adjusting screw rod can change Rectangular Spring by spring base Amount.
6. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 5 it is characterised in that: on described valve body Install lid, on this, one end of lid is inserted in the cavity of valve body, above covers installation locking nut, threadeds with locking nut Adjusting screw rod passes through above-mentioned upper lid to insert in the cavity of valve body and push against spring base.
7. sealing ring straight line dynamic sealing characteristic experimental apparatus according to claim 5 it is characterised in that: in valve element protuberance It is additionally provided with packing ring and valve port between, and packing ring is adjacent with the position of sealing ring.
8. a kind of sealing ring straight line dynamic sealing characteristic test method, using above-mentioned sealing ring straight line dynamic sealing characteristic test dress Put it is characterised in that comprising the steps:
In (1) three sealing ring installation portion, two ends for a sealing ring installation portion and c sealing ring installation portion, seal for b between a, c Circle installation portion, is the first cavity volume between a, b, is the second cavity volume between b, c;
(2) open air pump and run offer power for Rodless cylinder, make the slide block of Rodless cylinder drive sleeve assembly back and forth to transport along axle Dynamic, after the liquid injection port of hydraulic pump connection simultaneously, small-power operates to cavity volume aerofluxuss, discharges and hold while sleeve assembly moves back and forth The air of intracavity, after the air emptying in cavity volume, closes air pump and hydraulic pump;Can also be in a, after c installs sealing ring, hydraulic pressure Pump is pressed to the first cavity volume by the liquid injection port being communicated with the first cavity volume, from the liquid injection port aerofluxuss communicating with the second cavity volume, is holding After the air emptying of intracavity, close air pump and hydraulic pump;
(3) when the liquid pressure in the first cavity volume is equal to the liquid pressure p in the second cavity volume:
(31) in a and c, sealing ring is installed, b does not first install sealing ring;
(32) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure be p and maintain stable after close hydraulic pump, start displacement transducer and pull pressure sensor, opening air pump makes no The slide block of bar cylinder drives sleeve assembly to move back and forth along axle, takes once for reciprocal three times after sleeve assembly movement velocity v is stable Pull pressure sensor registration f, now f is equal to resistance sum suffered by sealing ring at a, c, because at a, c, environment is the same, resistance fa= fc
(33) close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve assembly wiped clean, installing in b needs Sealing ring to be tested, a and c keeps constant;Open hydraulic pump and pressurize into cavity volume and note the liquid of same pressure p, start displacement Sensor and pull pressure sensor, opening air pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, treats sleeve Component movement rate v is stably rear to take pull pressure sensor registration f1 reciprocal three times, sealing ring friction f at bb=f1- F, record analyses p, v, fbBetween contact;
(34) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (31)-(33);
(35) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (31)-(34);
(4) when the liquid pressure in the first cavity volume is not equal to the liquid pressure in the second cavity volume, high pressure p1, low pressure p2:
(41) in a and c, sealing ring is installed, b does not first install sealing ring;
(42) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to low pressure p2 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f1, now f1 is equal to resistance sum f1=f suffered by sealing ring at a, ca+fc, due to ring at a, c Border is the same, resistance fa=fc, therefore f1=2fc, close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve group Part wiped clean;
(43) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, in cavity volume Interior liquid pressure closes hydraulic pump to high pressure p1 and after maintaining stably, starts displacement transducer and pull pressure sensor, opens gas Pump makes the slide block of Rodless cylinder drive sleeve assembly to move back and forth along axle, reciprocal three times after sleeve assembly movement velocity v is stable Take pull pressure sensor registration f2, now f2 is equal to resistance sum f2=f suffered by sealing ring at a, ca+fc, due to ring at a, c Border is the same, resistance fa=fc, therefore f2=2fa, close air pump, discharge and hold intracavity liquid, pull down sleeve assembly, by axle and sleeve group Part wiped clean;
(44) open hydraulic pump to pressurized liquid injection body in cavity volume, by liquid pressure in pressure sensor monitoring cavity volume, first In cavity volume liquid pressure to high pressure p1 and maintain in stable, the second cavity volume liquid pressure to low pressure p2 and maintain stable after close liquid Press pump, starts displacement transducer and pull pressure sensor, and opening air pump makes the slide block of Rodless cylinder drive sleeve assembly past along axle Multiple motion, takes pull pressure sensor registration f3 reciprocal three times, due to environment at a after sleeve assembly movement velocity v is stable As step (43), at c, equally, f3 is equal to resistance suffered by sealing ring at a, c with suffered by sealing ring at b for environment and step (42) Frictional force sum, i.e. f3=fa+ fc+fb= fb+ 1/2f1+1/2f2, fb=f3-1/2f1-1/2f2, record analyses p1, p2, v, fbBetween contact;
(45) the movement velocity gradient of sleeve assembly is set, from the beginning of 0.5m/s, is incremented by 0.1m/s every time, adds to highest 2m/s, Each speed repeat step (41)-(44);
(46) adjust after liquid pressure in cavity volume by regulator, repeat the above steps (41)-(45).
9. sealing ring straight line dynamic sealing characteristic test method according to claim 8 it is characterised in that: liquid pressure p's Span is 0 20mpa.
10. sealing ring straight line dynamic sealing characteristic test method according to claim 8 it is characterised in that: in liquid pressure The pressure differential range of mesohigh p1 and low pressure p2 is 02 mpa.
11. sealing ring straight line dynamic sealing characteristic test methods according to claim 8 it is characterised in that: described liquid Can be sea water, fresh water or hydraulic oil.
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