CN207609641U - A kind of electrohydraulic actuator for reciprocating compressor amount regulating system - Google Patents
A kind of electrohydraulic actuator for reciprocating compressor amount regulating system Download PDFInfo
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- CN207609641U CN207609641U CN201721572298.9U CN201721572298U CN207609641U CN 207609641 U CN207609641 U CN 207609641U CN 201721572298 U CN201721572298 U CN 201721572298U CN 207609641 U CN207609641 U CN 207609641U
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 167
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 85
- 238000007789 sealing Methods 0.000 claims abstract description 78
- 238000007790 scraping Methods 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 16
- 239000002828 fuel tank Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004888 barrier function Effects 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 13
- 239000010720 hydraulic oil Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 231100001261 hazardous Toxicity 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 22
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
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- 239000010727 cylinder oil Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
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- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
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Abstract
The utility model is related to compressor tolerance regulation technology fields, specifically disclose a kind of electrohydraulic actuator for reciprocating compressor amount regulating system, including solenoid valve, the hydraulic cylinder below solenoid valve, the nitrogen seal device below hydraulic cylinder and the temperature sensor on hydraulic cylinder.Utility model device favorable sealing property, it can be achieved that in hydraulic oil and compresser cylinder processing medium two way seal, the hazardous gas in compresser cylinder is can simultaneously be effectively isolated in no external leakage.
Description
Technical field
The utility model belongs to compressor tolerance regulation technology field, and in particular to one kind being used for reciprocating compressor tolerance
The electrohydraulic actuator of regulating system.
Background technology
Reciprocating compressor tolerance stepless regulating system is made of hydraulic system, electrohydraulic actuator and control system.Electricity
Liquid executing agency receives control system signal, and the opening and closing time of compressor intake valve is controlled by hydraulic drive, real
The step-less adjustment of existing compressor tolerance in a certain range, the quality of dynamic property, which will be adjusted the capacity of compressor, to be generated
Very big influence, to influence the energy expenditure of compressor.
Requirement of the reciprocating compressor tolerance stepless regulating system to electrohydraulic actuator at present mainly has the following：1)
Fast response characteristic：In compressor tolerance stepless regulating system, high speed electrohydraulic executing agency need particular moment drive into
Air valve unloader acts, and intake valve valve block is made to be turned on and off.Usually, as compressor main shaft rotating speed r=300r/min, pressure
Working in reciprocating mode cycle T=200ms of contracting machine piston, the compression travel of wherein piston last about T/2=100ms, from real-time control
From the point of view of system, in order to enable gas valve plate to open and close to realize the step-less adjustment of compressor air-discharging amount in time,
The response time of electrohydraulic actuator must be limited within 20ms；2) high reliability and long-life characteristics：Compressor just
In the normal time between overhauls(TBO), host needs uninterrupted continuous operation, it is generally the case that compressor average annual non-failure operation time is
8000h, by taking rotating speed is the reciprocating-piston compressor of 300r/min as an example, the average annual on-off times of high speed electrohydraulic executing agency are about
It it is 1.45 hundred million times, which is all a prodigious challenge to the working life and reliability of electrohydraulic actuator；3) high pressure gas
Liquid two-phase seal：Large reciprocating compressor is very harsh with the sealing performance requirement of high speed electrohydraulic executing agency, is close first
Envelope requires height, since the processing medium of reciprocating compressor is typically the plays such as the flammable explosive gas such as hydrogen, methane or hydrogen sulfide
Poisonous gas, after leakage at gas-liquid two-phase sealing, the fluid inside actuator leaks and is brought into compresser cylinder, and hydraulic oil exists
High temperature and high pressure environment in cylinder issues biochemical variation, can make to generate carbon deposit at compressor valve, to the normal fortune of compressor
Life of changing the line of production endangers.Meanwhile the gas in cylinder also can anti-channeling enter in actuator, under toxic operating mode, processing medium can be with liquid
Pressure oil enters the fuel tank of hydraulic system, and since the space of fuel tank is and atmosphere, this can cause processing medium directly to leak
To the external world, intoxication accident can be also caused after being sucked by human body.Followed by pressure medium is high, and the common pressure of hydraulic oil is 10MPa,
The pressure of Compressor Process medium is up to 15MPa.Finally, the life requirements of sealing surface is high, in the condition of high frequency long-play
Under, very high requirement is proposed to the wearability of sealing secondary sealing area and sealing element.
In view of the above problems, there is an urgent need for designing a kind of electrohydraulic actuator of high response and high reliability, in high-frequency and high-voltage work
Regulating system requirement can be met under condition.
Invention content
The purpose of this utility model is to provide a kind of electro-hydraulic execution machines for reciprocating compressor amount regulating system
Structure is realized under high-frequency and high-voltage operating mode to the step-less adjustment of compressor tolerance.
The technical solution of the utility model is as follows：
A kind of electrohydraulic actuator is used for reciprocating compressor amount regulating system, including solenoid valve, hydraulic cylinder, nitrogen seal
Device and temperature sensor；
The solenoid valve is set to the top of hydraulic cylinder, is fixedly connected with hydraulic cylinder by four trip bolts；
Port A, port P and port T are equipped on solenoid valve；
The hydraulic cylinder includes upper cylinder body, lower cylinder body, piston bush, piston rod, hydraulic stem, seals guide support one, is close
Seal guide support two, sealing guide support three and oil-scraping ring support；
The upper cylinder body is set to the top of lower cylinder body, and the two is fixedly connected by hexagon socket cap head screw；
It is internally provided with rodless cavity A and rod chamber B in upper cylinder body, rodless cavity A and rod chamber B are coaxial；
It is equipped with actuator port on the upper surface of upper cylinder body, is connected to port A and rodless cavity A；
It is equipped with oil inlet and oil outlet in the side of upper cylinder body, wherein oil inlet is connected to port P, oil outlet and port T
Connection；
It is equipped with inserting through-hole in an axial direction in upper cylinder body and lower cylinder body, screw thread inserting type temperature is installed in inserting through-hole
Sensor；
The piston bush is set in rodless cavity A, is connected through a screw thread with upper cylinder body；
One end of the piston rod is set in piston bush, there is gap between the two, the other end of piston rod, which is located at, to be had
In rod cavity B；
It is equipped with annular balance slot in the outside of the piston rod, when fluid flows through compensating groove, is formed and is vortexed in slot, make oil
Liquid switchs to turbulent mixture state by laminar condition and forms resistance barrier；
It is equipped with drain tap and leakage port in the side of lower cylinder body, drain tap can lead back to the Leakage Energy at the sealing of piston clearance
Fuel tank；
In the seal chamber C for being internally provided with annular of sealing guide support two, seal chamber C is connected to leakage port；
From top to bottom it is equipped with sealing guide support one, sealing guide support two and sealing guide support successively in lower cylinder body
Three, three forms three radial direction static seals by three O-rings two and lower cylinder body inner wall respectively；
The sealing guide support one, sealing guide support two and seal the cylindrical shape that guide support three is hollow
Shape, three are coaxial；
It is equipped with groove one and guide groove one in the inner wall of the sealing guide support one, combined seal ring one is set to groove one
Interior, guidance tape one is set in guide groove one；
It is equipped with groove two and groove three in the inner wall of sealing guide support two, combined seal ring two is set in groove two, group
Sealing ring three is closed to be set in groove three；
It is equipped with groove four and guide groove two in sealing three inner wall of guide support, combined seal ring four is set in groove four, leads
It is set in guide groove two to band two；
It is equipped with bleeder port on the side wall of the sealing guide support two, is connected to the leakage port of lower cylinder body side；
The oil-scraping ring branch stays at the lower exit port of lower cylinder body, is connected through a screw thread with lower cylinder body；
The nitrogen seal device is set to the lower section of lower cylinder body, including the support of nitrogen envelope oil-scraping ring, nitrogen seal device link and nitrogen
It is sealed envelope guide support；
It is hollow structure that the support of nitrogen envelope oil-scraping ring, nitrogen seal device link and the nitrogen, which is sealed guide support, and
Three is coaxial；
O-ring four is additionally provided between nitrogen seal device link and lower cylinder body, the nitrogen seal device link passes through tight
Gu screw is fixedly connected with lower cylinder body, while being compressed O-ring four and being formed axial static seal together, set in nitrogen seal device link
There is air cavity D；
The nitrogen envelope oil-scraping ring branch stays at the lower section of nitrogen seal device link, and the two is connected through a screw thread；
The nitrogen is sealed the inside that guide support is set to nitrogen seal device link；
One end of the hydraulic stem is located in rod chamber B, and with the end thereof contacts of piston rod, the other end pass through sealing lead
To support one, seal chamber C, sealing guide support two, sealing guide support three, oil-scraping ring support, nitrogen seal device link, nitrogen envelope
After sealing guide support and nitrogen envelope oil-scraping ring support, it is located at the lower section of nitrogen seal device；
The combined seal ring one, combined seal ring two, combined seal ring three, combined seal ring four, combined seal ring
Five, combined seal ring six, combined seal ring seven and combined seal ring eight are made of O-ring and slip ring.
It is equipped with O-ring one in the junction of the upper cylinder body and lower cylinder body, axial static seal is realized, prevents in rod chamber B
Fluid leak.
It is equipped with high-pressure seal ring in the junction of the piston bush and upper cylinder body, forms static seal.
It is sealed guide support in the nitrogen and is equipped with O-ring three with nitrogen seal device link joint, forms static seal.
Combined seal ring five together are equipped at cooperation of the oil-scraping ring support with hydraulic stem, oil-scraping ring branch is sealed in nitrogen
Combined seal ring eight is equipped at support and hydraulic stem cooperation.
It is sealed at guide support and hydraulic stem cooperation in the nitrogen and is equipped with combined seal ring six, combined seal ring seven
33, guidance tape three and guidance tape four, for separating the nitrogen in air cavity D and the processing medium in reciprocating compressor cylinder.
Inflating port is equipped on the side wall of the nitrogen seal device link, for being filled with the nitrogen of certain pressure into air cavity D
Gas.
The material of the piston rod and piston bush is chrome-molybdenum steel, and there are difference of hardness for the two.
The material of the slip ring is the polytetrafluoroethylene (PTFE) containing carbon fiber.
When switching to P-A accesses inside solenoid valve, fluid enters from oil inlet, flows through the P-A accesses of solenoid valve, and by
Actuator port flows into rodless cavity A, and driving piston rod overcomes the external loading power at rod end with hydraulic stem, completes breakdown action；
When switching to A-T accesses inside solenoid valve, under load reaction effect, piston rod and hydraulic stem are straight in reverse direction
Line is moved and is resetted, and the fluid in rodless cavity A flows through the A-T accesses of solenoid valve from actuator port, and returns to fuel tank by oil outlet.
The remarkable result of the utility model is：
Electrohydraulic actuator described in the utility model, in design of Sealing Structure, hydraulic cylinder uses multiple sliding ring type group
The sealing structure of the additional guide ring of sealing ring is closed, friction coefficient is small, wear-resistant, and favorable sealing property is, it can be achieved that hydraulic oil and pressure
The two way seal of processing medium, no external leakage in contracting machine cylinder.On the basis of the above sealing structure, nitrogen seal device is devised, it can
To be effectively isolated the hazardous gas in compresser cylinder.Sealing ring is not used at sealing piston of hydraulic cylinder, but by matching
Minim gap between conjunction face realizes sealing, greatly reduces the frictional resistance of oil cylinder, avoids the mutual abrasion between part,
The dynamic characteristics such as response frequency, the kinetic force of friction of hydraulic cylinder and service life are made to greatly promote.In overall construction design, hydraulic cylinder is lived
Plug use split-type design, part dismounting it is more convenient, while improve piston to neutrality.Executing agency uses unique electricity
Magnet valve and hydraulic cylinder unitary design are not necessarily to connecting pipe, and installation is simple, and integral structure layout is more compact, and is not easy to leak,
Meanwhile improving system response time.In addition, by the temperature sensor installed in hydraulic cylinder, compression can also be monitored in real time
Machine cylinder interior gas temperature avoids the sealing ring at nitrogen seal device and hydraulic pressure rod end because of the excessively high generation failure of temperature, ensure that
The reliability of sealing structure.Experiment proves that hydraulic cylinder, which opens and closes the time, is respectively less than 15ms, it disclosure satisfy that 1 year and be not less than
8000 hours continuous operations, the operation is stable.
Description of the drawings
Fig. 1 is electrohydraulic actuator leftschematic diagram；
Fig. 2 is electrohydraulic actuator right side schematic view；
Fig. 3 is hydraulic cylinder structure schematic diagram；
Fig. 4 is hydraulic cylinder lower cylinder body sealed structural representation；
Fig. 5 is enlarged structure schematic diagram at I in Fig. 4.
In figure：1- solenoid valves；2- hydraulic cylinders；3- nitrogen seal devices；4- temperature sensors；5- upper cylinder bodies；6- lower cylinder bodies；7- lives
Plug sleeve；8- piston rods；9- hydraulic stems；10- seals guide support one；11- seals guide support two；12- seals guide support three；
13- oil-scraping rings support；14- oil inlets；15- actuator ports；16- oil outlets；17- drain taps；18- hexagon socket cap head screws；
19- trip bolts；20- high-pressure seal rings；21-O types circle one；22-O types circle two；23-O type circles；24- slip rings；25- guidance tapes one；
26- combined seal rings one；27- combined seal rings two；28- combined seal rings three；29- combined seal rings four；30- combined seal rings
Five；31- guidance tapes two；32- combined seal rings six；33- combined seal rings seven；34- guidance tapes three；35- guidance tapes four；36- is let out
Gas port；37- combined seal rings eight；38- nitrogen seals oil-scraping ring support；39- nitrogen seal device links；40- nitrogen is sealed envelope guide support；
41- inflating ports；42-O types circle three；43-O types circle four.
Specific implementation mode
Below in conjunction with the accompanying drawings and specific embodiment is described in further detail the utility model.
A kind of electrohydraulic actuator for reciprocating compressor amount regulating system as depicted in figs. 1 and 2, including electricity
Magnet valve 1, hydraulic cylinder 2, nitrogen seal device 3 and temperature sensor 4.
The solenoid valve 1 is set to the top of hydraulic cylinder 2, is fixedly connected with hydraulic cylinder 2 by four trip bolts 19.
Solenoid valve 1 is equipped with port A, port P and port T.The solenoid valve 1 can select to meet the commercially available of the utility model demand
Various types of products.
As shown in figure 3, the hydraulic cylinder 2 include upper cylinder body 5, it is lower cylinder body 6, piston bush 7, piston rod 8, hydraulic stem 9, close
Seal guide support 1, sealing guide support 2 11, sealing guide support 3 12 and oil-scraping ring support 13.
The upper cylinder body 5 is set to the top of lower cylinder body 6, and the two is fixedly connected by hexagon socket cap head screw 18.
Upper cylinder body 5 is internally provided with rodless cavity A and rod chamber B, and rodless cavity A and rod chamber B are coaxial.In the connection of upper cylinder body 5 and lower cylinder body 6
Place is equipped with O-ring 1, realizes axial static seal, prevents the fluid in rod chamber B from leaking.
It is equipped with actuator port 15 on the upper surface of upper cylinder body 5, is connected to port A and rodless cavity A.In upper cylinder body 5
Side is equipped with oil inlet 14 and oil outlet 16, and wherein oil inlet 14 is connected to port P, and oil outlet 16 is connected to port T.
It is equipped with inserting through-hole in an axial direction in upper cylinder body 5 and lower cylinder body 6, screw thread inserting type temperature is installed in inserting through-hole
Sensor 4 is spent, gas temperature in the temperature and compresser cylinder for measuring three O-rings 2 22.
The piston bush 7 is set in rodless cavity A, is connected through a screw thread with upper cylinder body 5, is connected in piston bush 7 and upper cylinder body 5
It meets place and is equipped with high-pressure seal ring 20, form static seal.One end of the piston rod 8 is set in piston bush 7, is existed between the two
The other end in gap, piston rod 8 is located in rod chamber B.In 2 action process of hydraulic cylinder, deposited between piston bush 7 and piston rod 8
It is mutually moving, by rationally designing length, the width in gap, is controlling its leakage rate to achieve the purpose that sealing.Work as high pressure oil
When flowing through gap, one layer of oil film is formed, lubrication and bearing can also be played the role of.The piston rod 8 and piston bush 7 use
Kinematics and static friction coefficient is small, and hardness is big, and there are the materials of certain degree of hardness difference, such as chrome-molybdenum steel.
It is equipped with annular balance slot in the outside of the piston rod 8, when fluid flows through compensating groove, can be formed and be vortexed in slot,
So that fluid is switched to turbulent mixture state by laminar condition and form resistance barrier, throttles to be formed to fluid, and make its generation
The pressure loss as big as possible reduces leakage.Because there are errors for the geometry and concentricity of part itself, make the height of work
Pressure oil in seal clearance mal-distribution and form hydraulic card clamping force, it increases the frictional force between dynamic sealing pair.By setting
Set compensating groove so that the radial oil pressure for acting on 8 outside of piston rod tends to balance, and piston rod 8 can be automatic right with piston bush 7
In, since the leakage of concentric circumferential weld is small more than eccentric circumferential weld, the centering of sealing pair part can also reduce the leakage rate of fluid,
Further increase sealing performance.
It is equipped with drain tap 17 and leakage port 36 in the side of lower cylinder body 6, drain tap 17 can be by letting out at the sealing of piston clearance
Oil leak leads back to fuel tank.
Sealing guide support 1, sealing guide support 2 11 and sealing is from top to bottom equipped with successively in lower cylinder body 6 to lead
To support 3 12, three forms three radial direction static seals by three O-rings 2 22 and 6 inner wall of lower cylinder body respectively.Described is close
Envelope guide support 1 seals guide support 2 11 and seals the cylindrical shape that guide support 3 12 is hollow, and three is coaxial.
In the seal chamber C for being internally provided with annular of sealing guide support 2 11, seal chamber C is connected to leakage port 36.
As shown in Figure 4 and Figure 5, groove one and guide groove one, combination are equipped in the inner wall of the sealing guide support 1
Sealing ring 1 is set in groove one, and guidance tape 1 is set in guide groove one.It is equipped in the inner wall of sealing guide support 2 11
Groove two and groove three, combined seal ring 2 27 are set in groove two, and combined seal ring 3 28 is set in groove three.It is led in sealing
It is equipped with groove four and guide groove two to 3 12 inner walls of support, combined seal ring 4 29 is set in groove four, and guidance tape 2 31 is set to
In guide groove two.The guidance tape 1 and guidance tape 2 31 is used for 9 righting of hydraulic stem.
It is equipped with bleeder port on the side wall of the sealing guide support 2 11, is connected to the leakage port 36 of 6 side of lower cylinder body,
It is recyclable from combined seal ring 2 27, combined seal ring 3 28 and 4 29 leaked gas of combined seal ring and from combination sealing
Enclose the remaining fluid of one 26 leakages.
The material of the slip ring 24 be the polytetrafluoroethylene (PTFE) containing carbon fiber, the material friction coefficient is low, it is wear-resistant and
Anti-extrusion ability is strong, good seal performance.The elasticity of compression counter-force of the O-ring 23 provides guarantor for the surface that is slidingly sealed of slip ring 24
Additional compression necessary to card sealing.
The oil-scraping ring support 13 is set at the lower exit port of lower cylinder body 6, is connected through a screw thread with lower cylinder body 6.
The nitrogen seal device 3 is set to the lower section of lower cylinder body 6, including nitrogen envelope oil-scraping ring support 38, nitrogen seal device link
39 and nitrogen be sealed guide support 40.Nitrogen envelope oil-scraping ring support 38, nitrogen seal device link 39 and the nitrogen is sealed guiding
Support 40 is hollow structure, and three is coaxial.Wherein, it is additionally provided with O-ring between nitrogen seal device link 39 and lower cylinder body 6
4 43, nitrogen seal device link 39 is fixedly connected by trip bolt with lower cylinder body 6, while being compressed O-ring 4 43 and being formed together
Axial static seal is equipped with air cavity D in nitrogen seal device link 39.
The nitrogen envelope oil-scraping ring support 38 is set to the lower section of nitrogen seal device link 39, and the two is connected through a screw thread.
The nitrogen is sealed the inside that guide support 40 is set to nitrogen seal device link 39, and envelope guide support is sealed in nitrogen
40 are equipped with O-ring 3 42 with 39 joint of nitrogen seal device link, form static seal.
One end of the hydraulic stem 9 is located in rod chamber B, and with the end thereof contacts of piston rod 8, the other end pass through sealing
Guide support 1, seal chamber C, sealing guide support 2 11, sealing guide support 3 12, oil-scraping ring support 13, nitrogen seal device
After link 39, nitrogen are sealed guide support 40 and nitrogen envelope oil-scraping ring support 38, it is located at the lower section of nitrogen seal device 3.
Combined seal ring 5 30 together are equipped at cooperation of the oil-scraping ring support 13 with hydraulic stem 9, oil-scraping ring branch is sealed in nitrogen
It is equipped with combined seal ring 8 37 at support 38 and 9 cooperation of hydraulic stem, can realize the sealing of high pressure gas in hydraulic cylinder, can also prevent
Only the dirts impurity such as the dust in external environment, sand-lime enters inside executing agency, reduces the abrasion of equipment.
Nitrogen be sealed at guide support 40 and 9 cooperation of hydraulic stem be equipped with combined seal ring 6 32, combined seal ring 7 33,
Guidance tape 3 34 and guidance tape 4 35, for separating the nitrogen in air cavity D and the processing medium in reciprocating compressor cylinder.
The combined seal ring 1, combined seal ring 2 27, combined seal ring 3 28, combined seal ring 4 29, group
Sealing ring 5 30, combined seal ring 6 32, combined seal ring 7 33 and combined seal ring 8 37 are closed by O-ring 23 and slip ring 24
Composition.
Inflating port 41 is equipped on the side wall of nitrogen seal device link 39, for being filled with the nitrogen of certain pressure into air cavity D
Gas.
When switching to P-A accesses inside solenoid valve 1, fluid enters from oil inlet 14, flows through the P-A accesses of solenoid valve 1,
And rodless cavity A is flowed by actuator port 15, driving piston rod 8 overcomes the external loading power at rod end with hydraulic stem 9, completes to open
Action.When switching to A-T accesses inside solenoid valve 1, under load reaction effect, piston rod 8 and hydraulic stem 9 are straight in reverse direction
Line is moved and is resetted, and the fluid in rodless cavity A flows through the A-T accesses of solenoid valve 1 from actuator port 15, and is returned by oil outlet 16
Fuel tank.Based on the above, completing the cycle opening and closing action of hydraulic cylinder 2.
It is designed using contactless special construction at the utility model sealing piston of hydraulic cylinder, sliding ring type is used at hydraulic stem
The sealing structure of the additional guidance tape of bi-directional combination sealing ring, it can be achieved that rod end both sides gas and fluid two way seal, leakproofness
Can be excellent, frictional resistance is small, fast response time, and the requirement of regulating system can be met under high-frequency and high-voltage operating mode.
Claims (10)
1. a kind of electrohydraulic actuator is used for reciprocating compressor amount regulating system, it is characterised in that：Including solenoid valve (1),
Hydraulic cylinder (2), nitrogen seal device (3) and temperature sensor (4)；
The solenoid valve (1) is set to the top of hydraulic cylinder (2), connects by the way that four trip bolts (19) and hydraulic cylinder (2) are fixed
It connects；
Port A, port P and port T are equipped on solenoid valve (1)；
The hydraulic cylinder (2) includes upper cylinder body (5), lower cylinder body (6), piston bush (7), piston rod (8), hydraulic stem (9), sealing
Guide support one (10), sealing guide support two (11), sealing guide support three (12) and oil-scraping ring support (13)；
The upper cylinder body (5) is set to the top of lower cylinder body (6), and the two is fixedly connected by hexagon socket cap head screw (18)；
It is internally provided with rodless cavity A and rod chamber B in upper cylinder body (5), rodless cavity A and rod chamber B are coaxial；
It is equipped with actuator port (15) on the upper surface of upper cylinder body (5), is connected to port A and rodless cavity A；
It is equipped with oil inlet (14) and oil outlet (16) in the side of upper cylinder body (5), wherein oil inlet (14) is connected to port P, goes out
Hydraulic fluid port (16) is connected to port T；
It is equipped with inserting through-hole in an axial direction in upper cylinder body (5) and lower cylinder body (6), screw thread inserting type temperature is installed in inserting through-hole
Spend sensor (4)；
The piston bush (7) is set in rodless cavity A, is connected through a screw thread with upper cylinder body (5)；
One end of the piston rod (8) is set in piston bush (7), there is gap, the other end position of piston rod (8) between the two
In in rod chamber B；
It is equipped with annular balance slot in the outside of the piston rod (8), when fluid flows through compensating groove, is formed and is vortexed in slot, make oil
Liquid switchs to turbulent mixture state by laminar condition and forms resistance barrier；
It is equipped with drain tap (17) and leakage port (36) in the side of lower cylinder body (6), drain tap (17) can will be at the sealing of piston clearance
Leakage Energy lead back to fuel tank；
In the seal chamber C for being internally provided with annular of sealing guide support two (11), seal chamber C is connected to leakage port (36)；
From top to bottom it is equipped with sealing guide support one (10), sealing guide support two (11) and sealing successively in lower cylinder body (6)
Guide support three (12), three form three radial direction static seals by three O-rings two (22) and lower cylinder body (6) inner wall respectively；
Sealing guide support one (10), sealing guide support two (11) and the sealing guide support three (12) is hollow
Cylindrical shape, three are coaxial；
It is equipped with groove one and guide groove one in the inner wall of the sealing guide support one (10), combined seal ring one (26) is set to ditch
In slot one, guidance tape one (25) is set in guide groove one；
It is equipped with groove two and groove three in the inner wall of sealing guide support two (11), combined seal ring two (27) is set to groove two
Interior, combined seal ring three (28) is set in groove three；
It is equipped with groove four and guide groove two in sealing guide support three (12) inner wall, combined seal ring four (29) is set to groove four
Interior, guidance tape two (31) is set in guide groove two；
It is equipped with bleeder port on the side wall of the sealing guide support two (11), is connected with the leakage port (36) of lower cylinder body (6) side
It is logical；
The oil-scraping ring support (13) is set at the lower exit port of lower cylinder body (6), is connected through a screw thread with lower cylinder body (6)；
The nitrogen seal device (3) is set to the lower section of lower cylinder body (6), including nitrogen envelope oil-scraping ring support (38), nitrogen seal device connection
Frame (39) and nitrogen are sealed guide support (40)；
It is hollow that nitrogen envelope oil-scraping ring support (38), nitrogen seal device link (39) and the nitrogen, which is sealed guide support (40),
Structure, and three is coaxial；
O-ring four (43), the nitrogen seal device link are additionally provided between nitrogen seal device link (39) and lower cylinder body (6)
(39) it is fixedly connected with lower cylinder body (6) by trip bolt, while compressing O-ring four (43) and forming axial static seal together,
Air cavity D is equipped in nitrogen seal device link (39)；
The nitrogen envelope oil-scraping ring support (38) is set to the lower section of nitrogen seal device link (39), and the two is connected through a screw thread；
The nitrogen is sealed the inside that guide support (40) is set to nitrogen seal device link (39)；
One end of the hydraulic stem (9) is located in rod chamber B, and with the end thereof contacts of piston rod (8), the other end pass through sealing
Guide support one (10), seal chamber C, sealing guide support two (11), sealing guide support three (12), oil-scraping ring support (13),
After nitrogen seal device link (39), nitrogen are sealed guide support (40) and nitrogen envelope oil-scraping ring support (38), it is located at nitrogen seal device (3)
Lower section；
The combined seal ring one (26), combined seal ring two (27), combined seal ring three (28), combined seal ring four
(29), combined seal ring five (30), combined seal ring six (32), combined seal ring seven (33) and combined seal ring eight (37) by
O-ring (23) and slip ring (24) composition.
2. a kind of electrohydraulic actuator as described in claim 1, it is characterised in that：In the upper cylinder body (5) and lower cylinder body (6)
Junction be equipped with O-ring one (21), realize axial static seal, prevent the fluid in rod chamber B from leaking.
3. a kind of electrohydraulic actuator as claimed in claim 2, it is characterised in that：In the piston bush (7) and upper cylinder body (5)
Junction be equipped with high-pressure seal ring (20), formed static seal.
4. a kind of electrohydraulic actuator as claimed in claim 3, it is characterised in that：It is sealed guide support (40) in the nitrogen
It is equipped with O-ring three (42) with nitrogen seal device link (39) joint, forms static seal.
5. a kind of electrohydraulic actuator as claimed in claim 4, it is characterised in that：In the oil-scraping ring support (13) and liquid
One of combined seal ring five (30) is equipped at the cooperation of compression bar (9), at nitrogen envelope oil-scraping ring support (38) with hydraulic stem (9) cooperation
Equipped with combined seal ring eight (37).
6. a kind of electrohydraulic actuator as claimed in claim 5, it is characterised in that：It is sealed envelope guide support in the nitrogen
(40) and at hydraulic stem (9) cooperation combined seal ring six (32), combined seal ring 7 33, guidance tape three (34) and guidance tape are equipped with
Four (35), for separating the nitrogen in air cavity D and the processing medium in reciprocating compressor cylinder.
7. a kind of electrohydraulic actuator as claimed in claim 6, it is characterised in that：In the nitrogen seal device link (39)
Side wall is equipped with inflating port (41), for being filled with the nitrogen of certain pressure into air cavity D.
8. a kind of electrohydraulic actuator as claimed in claim 7, it is characterised in that：The piston rod (8) and piston bush (7)
Material be chrome-molybdenum steel, and there are difference of hardness for the two.
9. a kind of electrohydraulic actuator as claimed in claim 8, it is characterised in that：The material of the slip ring (24) be containing
The polytetrafluoroethylene (PTFE) of carbon fiber.
10. a kind of electrohydraulic actuator as claimed in claim 9, it is characterised in that：P-A is switched to inside solenoid valve (1)
When access, fluid enters from oil inlet (14), flows through the P-A accesses of solenoid valve (1), and flow into rodless cavity by actuator port (15)
A, driving piston rod (8) overcome the external loading power at rod end with hydraulic stem (9), complete breakdown action；
When switching to A-T accesses inside solenoid valve (1), under load reaction effect, piston rod (8) and hydraulic stem (9) are along anti-
Direction moves along a straight line and resets, and the fluid in rodless cavity A flows through the A-T accesses of solenoid valve (1) from actuator port (15), and by going out
Hydraulic fluid port (16) returns to fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721572298.9U CN207609641U (en) | 2017-11-22 | 2017-11-22 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721572298.9U CN207609641U (en) | 2017-11-22 | 2017-11-22 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207609641U true CN207609641U (en) | 2018-07-13 |
Family
ID=62795876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721572298.9U Withdrawn - After Issue CN207609641U (en) | 2017-11-22 | 2017-11-22 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207609641U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005993A (en) * | 2017-11-22 | 2018-05-08 | 北京航天石化技术装备工程有限公司 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
| CN113738610A (en) * | 2021-09-24 | 2021-12-03 | 北京海德利森科技有限公司 | Piston type hydrogen compressor |
-
2017
- 2017-11-22 CN CN201721572298.9U patent/CN207609641U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005993A (en) * | 2017-11-22 | 2018-05-08 | 北京航天石化技术装备工程有限公司 | A kind of electrohydraulic actuator for reciprocating compressor amount regulating system |
| CN108005993B (en) * | 2017-11-22 | 2023-12-15 | 北京航天石化技术装备工程有限公司 | Electrohydraulic actuator for gas flow regulating system of reciprocating compressor |
| CN113738610A (en) * | 2021-09-24 | 2021-12-03 | 北京海德利森科技有限公司 | Piston type hydrogen compressor |
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