CN110260028A - A kind of anti-leak oil motor - Google Patents
A kind of anti-leak oil motor Download PDFInfo
- Publication number
- CN110260028A CN110260028A CN201910547714.7A CN201910547714A CN110260028A CN 110260028 A CN110260028 A CN 110260028A CN 201910547714 A CN201910547714 A CN 201910547714A CN 110260028 A CN110260028 A CN 110260028A
- Authority
- CN
- China
- Prior art keywords
- oil
- front shroud
- oil motor
- cylinder sleeve
- sealing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/1225—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston with a plurality of pistons
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Actuator (AREA)
- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The present invention relates to oil motor fields, disclose a kind of anti-leak oil motor, the oil motor includes the seal cylinder sleeve 5 of intermediate gusset piece 4 between front shroud 2 and back shroud 3, connection front shroud 2 and intermediate gusset piece 4, and the sealing piston 6 between seal cylinder sleeve 5 and piston rod 1 is set, wherein, seal cylinder sleeve 5, sealing piston 6 and front shroud 2 are surrounded by a separate cavities, the bottom of the separate cavities is equipped with oil trap 7, and oil trap 7 passes through the normal pressure oil returning tube being arranged on front shroud 2 and is connected to the oil return system of oil motor.When high pressure fireresistant oil is revealed from oil cylinder, the sealed piston 6 of the fire resistant oil of leakage, which enters in oil trap 7, to be collected, and the normal pressure oil returning tube by being arranged on the front shroud 2 is recovered in the oil return system of oil motor, be can avoid the fire resistant oil inside oil motor and is revealed outward from front shroud 2 and the connecting portion of piston rod 1.
Description
Technical field
The present invention relates to oil motor fields, and in particular to a kind of anti-leak oil motor.
Background technique
Tensile force type oil motor is mainly used for the adjusting security system of 100-300MW thermal power generation Steam Turbine, and oil motor is
The regulating mechanism of the steam inlet valve of steam turbine, fire resistant oil enter the working chamber of oil motor by pipeline, push piston rod
Component movement, and the air intake valve being attached thereto is opened.With the variation of steam load, the piston rod assembly of timing steam gate is needed
It takes regular exercise to adjust the aperture of steam valve.
At the driving end of oil motor, oil cylinder and piston rod are sealed using sealing element, can in the motion process of piston rod
Situations such as not tight valve stem seal or sealing element aging, abrasion can be will appear, causes fire resistant oil to leak, the fire resistant oil leaked out
Meeting high temperature can adhere on the piston rod, while adsorb the substances such as the dust in working environment generation scale formation, aggravation piston rod,
The abrasion of sealing element and other component accelerates fire-resistant oil seepage.Once and fire-resistant oil seepage, Steam Turbine are just stopped
Vehicle processing, the unplanned parking of unit will cause enterprise's cost of electricity-generating and increase, and then influence Business Economic Benefit.
Therefore, how to design it is a kind of can effectively prevent fire resistant oil leakage oil motor structure be those skilled in the art urgently
It solves the problems, such as.
Summary of the invention
It is of the existing technology the purpose of the invention is to overcome the problems, such as, a kind of anti-leak oil motor is provided.
To achieve the above object, the present invention provides a kind of anti-leak oil motor, the oil motor include oil cylinder, with it is described
The piston rod 1 that oil cylinder is slidably connected, and it is mounted on the front shroud 2 and back shroud 3 in 1 outside of piston rod, it further include being located at
Intermediate gusset piece 4, the connection front shroud 2 and the intermediate gusset piece 4 between the front shroud 2 and the back shroud 3
Seal cylinder sleeve 5, and the sealing piston 6 being arranged between the seal cylinder sleeve 5 and the piston rod 1；
Wherein, the seal cylinder sleeve 5, the sealing piston 6 and the front shroud 2 are surrounded by a separate cavities, the isolation
The bottom of chamber is equipped with oil trap 7, and the oil trap 7 passes through the normal pressure oil returning tube and oil motor being arranged on the front shroud 2
Oil return system connection.
Preferably, the piston rod 1 be pierced by the front shroud 2 position and the front shroud 2 by y-type seal ring 8 it is close
Envelope, and by guide bearing 9 to 1 positioning and guiding of piston rod；It is provided between the front shroud 2 and the y-type seal ring 8 close
Sealed cover 10, the sealing gland 10 are used to carry out axial restraint to the guide bearing 9；The sealing gland 10 and the front cover
Plate 2 is bolted, and connecting pin is sealed by sealing element 11.
Preferably, the outside of the sealing gland 10 is provided with dustproof gland 12, the dustproof gland 12 and the piston
Dust guard 13 is provided between bar 1；The dust guard 13 and 8 axial restraint of y-type seal ring, and by setting described anti-
Gasket 14 between dirt part 13 and the y-type seal ring 8 carries out interval adjustment；The dustproof gland 12 and the sealing gland 10
It is bolted.
Preferably, the outside of the seal cylinder sleeve 5 is equipped with cooling device, and the cooling device includes 15 He of cooling jacket
Diaphragm 16 in 15 inner cavity of cooling jacket is set；Wherein, the cooling jacket 15 has a water inlet 20 and one to go out
The mouth of a river 21, the cooling water for flowing to the water outlet 21 from the water inlet 20 are used for the seal cylinder sleeve 5 and the front shroud 2
Cooling.
Preferably, the water inlet line corresponding to the water inlet 20, the intermediate gusset piece are provided on the front shroud 2
The outlet conduit corresponding to the water outlet 21 is provided on 4；It is between the water inlet line and the water inlet 20 and described
Sealing element 11 is respectively arranged between outlet conduit and the water outlet 21.
Preferably, between the seal cylinder sleeve 5 and the front shroud 2 and the seal cylinder sleeve 5 intermediate couples with described
Sealing element 11 is provided between plate 4.
Preferably, oil motor axial direction is provided with sealing element 11 between the seal cylinder sleeve 5 and the front shroud 2；
Oil motor radial direction is provided with sealing element 11 between the seal cylinder sleeve 5 and the intermediate gusset piece 4.
Preferably, the oil motor further includes main piston 17, and the outside of the main piston 17 is provided with master cylinder set 18；It is described
The both ends of master cylinder set 18 are connect with the intermediate gusset piece 4 and the back shroud 3 respectively, and junction is provided with along axial direction and diameter
To the sealing element 11 in direction.
Preferably, sealing element 11 is provided between the piston rod 1 and the sealing piston 6 and the main piston 17.
Preferably, the sealing element 11 is O-ring seal.
Through the above technical solutions, the seal cylinder sleeve 5 being arranged in oil motor, sealing piston 6 surround one with front shroud 2 and are isolated
The bottom of chamber, the separate cavities is equipped with oil trap 7, and when high pressure fireresistant oil is revealed from oil cylinder, the fire resistant oil of leakage is through close
Envelope piston 6, which enters in oil trap 7, to be collected, and the normal pressure oil returning tube by being arranged on the front shroud 2 is recovered to oil motor
Oil return system in, can avoid oil motor inside fire resistant oil let out outward from front shroud 2 and the connecting portion of piston rod 1
Dew.
Detailed description of the invention
Fig. 1 is the structure chart of oil motor provided by the invention；
Description of symbols
Piston rod 1；Front shroud 2；Back shroud 3；Intermediate gusset piece 4；Seal cylinder sleeve 5；Sealing piston 6；Oil trap 7；Y type is close
Seal 8；Guide bearing 9；Sealing gland 10；Sealing element 11；Dustproof gland 12；Dust guard 13；Gasket 14；Cooling jacket 15；Water conservancy diversion
Partition 16；Main piston 17；Master cylinder set 18；Nothing pushes back hydraulic fluid port 19；Water inlet 20；Water outlet 21；Fire-resistant oil inlet 22；Push back oil
Hole 23；Bolt hole 24；Piston back of the body cap 25；Adjust axle sleeve 26.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention is to solve the problems, such as fire resistant oil leakage inside oil motor, provides a kind of novel anti-leak oil motor knot
Structure as shown in Figure 1, the anti-leak oil motor includes the piston rod 1 that oil cylinder and the oil cylinder are slidably connected, and is mounted on institute
The front shroud 2 and back shroud 3 in 1 outside of piston rod are stated, further, the oil motor further includes being located at the front shroud 2 and institute
The seal cylinder sleeve 5, Yi Jishe stated the intermediate gusset piece 4 between back shroud 3, connect the front shroud 2 and the intermediate gusset piece 4
Set the sealing piston 6 between the seal cylinder sleeve 5 and the piston rod 1.
Wherein, the seal cylinder sleeve 5, the sealing piston 6 and the front shroud 2 are surrounded by a separate cavities, the isolation
The bottom of chamber is equipped with oil trap 7, and the oil trap 7 passes through the normal pressure oil returning tube and oil motor being arranged on the front shroud 2
Oil return system connection.When high pressure fireresistant oil is revealed from oil cylinder, the sealed piston 6 of the fire resistant oil of leakage enters oil trap
It is collected in 7, and the nothing by being arranged on the front shroud 2 pushes back hydraulic fluid port 19 and enters in normal pressure oil returning tube, is filtered by filter
It is recovered in the fuel tank of oil motor and recycles afterwards, therefore, oil motor structure provided by the invention can avoid internal fire resistant oil
It is revealed outward from front shroud 2 and the connecting portion of piston rod 1.Simultaneously as the nothing of 7 bottom of oil trap design pushes back hydraulic fluid port
19 are connected with system normal pressure oil returning tube, it can be ensured that the operating pressure in the separate cavities is normal pressure.
According to a preferred embodiment of the present invention, the piston rod 1 be pierced by the front shroud 2 position and it is described before
Cover board 2 is sealed by y-type seal ring 8, and by guide bearing 9 to 1 positioning and guiding of piston rod.The front shroud 2 and Y
Sealing gland 10 is provided between type sealing ring 8, the sealing gland 10 is used to carry out axial restraint to the guide bearing 9.Institute
It states sealing gland 10 to be bolted with the front shroud 2, and connecting pin is provided with sealing element 11 and is sealed.Due to isolation
Intracavitary operating pressure is normal pressure, and y-type seal ring 8 works under the conditions of no pressure, reduces wear rate, extends oil motor operation
Time.
According to a preferred embodiment of the present invention, the outside of the sealing gland 10 is provided with dustproof gland 12, institute
It states and is provided with dust guard 13 between dustproof gland 12 and the piston rod 1.The dust guard 13 and the y-type seal ring 8 are axial
It is fixed, and the gasket 14 by being arranged between the dust guard 13 and the y-type seal ring 8 carries out interval adjustment.It is described anti-
Dirt gland 12 is bolted with the sealing gland 10.
Specifically, as shown in Figure 1, the sealing gland 10 is that there are two the ring structures of step surface for tool, in level-one step
The bottom in face is provided with y-type seal ring 8, and the seal groove that can accommodate sealing element 11 is provided between level-one step surface and front shroud 2,
The bolt hole that can be bolted with front shroud 2 is provided in vertical side between level-one step surface and two stage steps face
24.The dustproof gland 12 is that there are two the annulus of step surface, First terrace and second step faces to press respectively with sealing for tool
The inner wall of lid 10 connects, the inner wall and 13 clearance fit of dust guard of the dustproof gland 12.The set end of y-type seal ring 8 passes through
Gasket 14 is connect with the side surface of the dust guard 13, and the inner wall of the divergent ends of y-type seal ring 8 and the sealing gland 10 connects
It connects.
According to a preferred embodiment of the present invention, the outside of the seal cylinder sleeve 5 is equipped with cooling device, described cold
But device includes cooling jacket 15 and the diaphragm 16 that is arranged in 15 inner cavity of cooling jacket, and the diaphragm 16 is used
In the direction of guidance water flow.Wherein, the cooling jacket 15 has a water inlet 20 and a water outlet 21, flows from the water inlet 20
It is used to cool down to the seal cylinder sleeve 5 and the front shroud 2 to the cooling water of the water outlet 21.Due to closely high temperature source, easily
Lead to high oil temperature inside oil motor, the oil cylinder temperature of oil motor can be effectively reduced in cooling device, guarantee fire resistant oil oil temperature just
Normal temperature range operation, meanwhile, the operating temperature of front shroud 2 and y-type seal ring 8 is reduced, steam turbine speed control system is improved
The stability and safety of system.Preferably, the size according to seal cylinder sleeve 5 between front shroud 2 and intermediate gusset piece 4, in institute
State the actual size of the exterior design cooling jacket 15 of seal cylinder sleeve 5.
As a kind of specific embodiment, the water inlet pipe corresponding to the water inlet 20 is provided on the front shroud 2
Road is provided with the outlet conduit corresponding to the water outlet 21 on the intermediate gusset piece 4.The water inlet line and the water inlet
It is respectively arranged with sealing element 11 between mouth 20 and between the outlet conduit and the water outlet 21, can effectively prevent cooling
Water leakage.In use, the low temperature or room temperature cooling water that flow into from water inlet line enter cooling device from water inlet 20, via water conservancy diversion
The channel that partition 16 is formed is flowed out to the water outlet 21 of cooling device, then is discharged by outlet conduit.Cooling device by with it is close
Envelope cylinder sleeve 5, front shroud 2 and the direct of intermediate gusset piece 4 contact to absorb oil temperature, and the heat for preventing piston rod 1 from distributing influences oil
The environment temperature of motivation makes the reduction of the temperature of piston rod 1 and sealing element 11.Preferably, diaphragm 16 can press layer to be internal
Box house is horizontally divided into multilayer by the body structure of division, every layer communicates, and diaphragm 16 is by every layer in the longitudinal direction
It forms tortuous water stream channel and has proposed the lowering ability of cooling device so that recirculated water goes over the inside of entire cabinet as far as possible, also
The phenomenon that water flow is stagnated can be prevented.
According to a preferred embodiment of the present invention, between the seal cylinder sleeve 5 and the front shroud 2, the sealing
Sealing element 11 is provided between cylinder sleeve 5 and the intermediate gusset piece 4.
As a kind of specific embodiment, along oil motor axial direction between the seal cylinder sleeve 5 and the front shroud 2
It is provided with sealing element 11.Oil motor radial direction is provided with sealing element between the seal cylinder sleeve 5 and the intermediate gusset piece 4
11。
According to a preferred embodiment of the present invention, the oil motor further includes main piston 17, the main piston 17
Rear end is provided with piston back of the body cap 25, and the outside of the main piston 17 is provided with master cylinder set 18.According to master cylinder set 18 in the present invention
And the dimension of inner and outer diameters of seal cylinder sleeve 5 designs the actual size of intermediate gusset piece 4.It is provided on the intermediate gusset piece 4
Fire-resistant oil inlet 22 has been provided on back shroud 3 and has pushed back oilhole 23, has been provided with adjustment axis between main piston 17 and sealing piston 6
Set 26, for being sealed jointly to the fire resistant oil in oil cylinder, even if minor leakage occurs for fire resistant oil, the fire resistant oil of leakage is through close
It seals piston 6 and enters oil trap 7, and then recycled by oil return system.
Preferably, the both ends of the master cylinder set 18 are connect with the intermediate gusset piece 4 and the back shroud 3 respectively, are connected
Place is provided with the sealing element 11 in direction both axially and radially.
According to a preferred embodiment of the present invention, the piston rod 1 and the sealing piston 6 and the main piston 17
Between be provided with sealing element 11.
Preferably, sealing element 11 of the present invention is the sealing element of any achievable end face or end part seal function,
Illustratively, the sealing element 11 is O-ring seal.O-ring seal and y-type seal ring 8 are that Machine Design commonly seals member
Part, wherein the section of O-ring seal is rounded, and the section of y-type seal ring 8 is Y-shaped, can be used for static or has relative motion
The sealing device of trend.According to parameters such as operating pressure, the material of sealing element 11 and the hardness of fire resistant oil in the present invention, in part
Connecting pin to installation sealing element 11 groove depth and groove width be designed.
The leakage-preventing oil motor provided according to the present invention, in a first aspect, by increase seal cylinder sleeve 5, sealing piston 6 and
The measures such as oil trap 7, play sealing, depressurization to the in-oil cylinder fire resistant oil of oil motor, even if fire resistant oil passes through oil cylinder, main work
Plug 17 leaks, and the fire resistant oil revealed by 7 Duis of oil trap is collected and is recycled to nothing and pushes back in oil system, it is ensured that Y type
Sealing ring 8 works under the conditions of no pressure, reduces the degree of wear of y-type seal ring 8, extends the runing time of oil motor；Second
Aspect cools down to the fire resistant oil in oil motor by increasing cooling device on the outside of sealed cylinder, it is ensured that fire resistant oil is being advised
Determine operation in temperature range, cooling device can also by reducing the front shroud 2 of oil motor and the operating temperature of y-type seal ring 8,
Improve its working life；The third aspect, by increasing sealing gland 10, dustproof gland 12, dust-proof on the front shroud 2 of oil motor
The parts such as part 13, and the connection between part is that detachable connection subtracts convenient for the replacement to y-type seal ring 8 and dust guard 13
The emergency repair time of few oil motor, improves working efficiency.
According to actual survey, existing high-pressure governing valve oil motor just has oil leakage phenomenon after the cycle of operation up to the 10-12 month, needs
Parking maintenance is carried out, the needs being unable to meet production.After designing, installing novel oil motor structure provided by the invention,
The cycle of operation of oil motor up to 2 years or more, there are no oil leakage phenomenon, extend the runing time of steam turbine, reduce equipment dimension
Expense is repaired, economic benefit is improved.
The preferred embodiment of the present invention has been described above in detail, and still, the present invention is not limited thereto.In skill of the invention
In art conception range, can with various simple variants of the technical solution of the present invention are made, including each technical characteristic with it is any its
Its suitable method is combined, and it should also be regarded as the disclosure of the present invention for these simple variants and combination, is belonged to
Protection scope of the present invention.
Claims (10)
1. a kind of anti-leak oil motor, the oil motor includes the piston rod (1) that oil cylinder and the oil cylinder are slidably connected, and
The front shroud (2) and back shroud (3) being mounted on the outside of the piston rod (1), which is characterized in that the oil motor further includes being located at
Intermediate gusset piece (4) between the front shroud (2) and the back shroud (3) connect the front shroud (2) and described intermediate joins
The seal cylinder sleeve (5) of fishplate bar (4), and the sealing piston being arranged between the seal cylinder sleeve (5) and the piston rod (1)
(6)；
Wherein, the seal cylinder sleeve (5), the sealing piston (6) and the front shroud (2) are surrounded by a separate cavities, it is described every
Bottom from chamber is equipped with oil trap (7), normal pressure oil returning tube of the oil trap (7) by setting on the front shroud (2)
It is connected to the oil return system of oil motor.
2. oil motor according to claim 1, which is characterized in that the piston rod (1) is pierced by the portion of the front shroud (2)
Position is sealed with the front shroud (2) by y-type seal ring (8), and by guide bearing (9) to the piston rod (1) positioning and guiding；
It is provided between the front shroud (2) and the y-type seal ring (8) sealing gland (10), the sealing gland (10) is used
In to the guide bearing (9) progress axial restraint；
The sealing gland (10) is bolted with the front shroud (2), and connecting pin is sealed by sealing element (11).
3. oil motor according to claim 2, which is characterized in that be provided with dust-proof pressure on the outside of the sealing gland (10)
It covers (12), dust guard (13) is provided between the dustproof gland (12) and the piston rod (1)；
The dust guard (13) and the y-type seal ring (8) axial restraint, and by setting the dust guard (13) with it is described
Gasket (14) between y-type seal ring (8) carries out interval adjustment；
The dustproof gland (12) is bolted with the sealing gland (10).
4. oil motor according to claim 1, which is characterized in that be equipped with cooling dress on the outside of the seal cylinder sleeve (5)
It sets, the cooling device includes the diaphragm (16) of cooling jacket (15) and setting in the cooling jacket (15) inner cavity；
Wherein, the cooling jacket (15) has a water inlet (20) and a water outlet (21), flows to institute from the water inlet (20)
The cooling water for stating water outlet (21) is used to cool down to the seal cylinder sleeve (5) and the front shroud (2).
5. oil motor according to claim 4, which is characterized in that be provided on the front shroud (2) correspond to it is described into
The water inlet line at the mouth of a river (20) is provided with the outlet conduit corresponding to the water outlet (21) on the intermediate gusset piece (4)；
Distinguish between the water inlet line and the water inlet (20) and between the outlet conduit and the water outlet (21)
It is provided with sealing element (11).
6. oil motor according to claim 1, which is characterized in that the seal cylinder sleeve (5) and the front shroud (2) it
Between and the seal cylinder sleeve (5) and the intermediate gusset piece (4) between be provided with sealing element (11).
7. according to claim 6, which is characterized in that dynamic along oil between the seal cylinder sleeve (5) and the front shroud (2)
Machine axial direction is provided with sealing element (11)；
Oil motor radial direction is provided with sealing element (11) between the seal cylinder sleeve (5) and the intermediate gusset piece (4).
8. oil motor according to claim 1, which is characterized in that the oil motor further includes main piston (17), the master
Master cylinder set (18) are provided on the outside of piston (17)；
The both ends of the master cylinder set (18) are connect with the intermediate gusset piece (4) and the back shroud (3) respectively, and junction is all provided with
It is equipped with the sealing element (11) in direction both axially and radially.
9. oil motor according to claim 8, which is characterized in that the piston rod (1) and the sealing piston (6), institute
It states and is provided with sealing element (11) between main piston (17).
10. the oil motor according to any one of claim 2,5-9, which is characterized in that the sealing element (11) is O-shaped close
Seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547714.7A CN110260028B (en) | 2019-06-24 | 2019-06-24 | Anti-leakage oil engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910547714.7A CN110260028B (en) | 2019-06-24 | 2019-06-24 | Anti-leakage oil engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110260028A true CN110260028A (en) | 2019-09-20 |
| CN110260028B CN110260028B (en) | 2021-01-15 |
Family
ID=67920648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910547714.7A Active CN110260028B (en) | 2019-06-24 | 2019-06-24 | Anti-leakage oil engine |
Country Status (1)
| Country | Link |
|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377277A (en) * | 2020-11-27 | 2021-02-19 | 大唐陕西发电有限公司 | Push-pull rod sealing structure of steam turbine |
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|---|---|---|---|---|
| DE4201925A1 (en) * | 1992-01-24 | 1993-07-29 | Sparhuber Elmar | Pneumatic cylinder with preliminary stroke and insulation for spot welding - incorporates a preliminary stroke piston, gives more simple and accurate positioning |
| CN2364301Y (en) * | 1999-04-05 | 2000-02-16 | 李宝玉 | Feedback rotating slide valve for oil power machine |
| CN101769276A (en) * | 2008-12-30 | 2010-07-07 | 上海航天液压控制系统有限公司 | Quick unloading device for hydraulic servomotor |
| CN204403037U (en) * | 2015-01-07 | 2015-06-17 | 惠州市兴源自动化设备有限公司 | Punching oil cylinder |
| CN206830568U (en) * | 2017-05-24 | 2018-01-02 | 江苏华电吴江热电有限公司 | A kind of servomotor |
-
2019
- 2019-06-24 CN CN201910547714.7A patent/CN110260028B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4201925A1 (en) * | 1992-01-24 | 1993-07-29 | Sparhuber Elmar | Pneumatic cylinder with preliminary stroke and insulation for spot welding - incorporates a preliminary stroke piston, gives more simple and accurate positioning |
| CN2364301Y (en) * | 1999-04-05 | 2000-02-16 | 李宝玉 | Feedback rotating slide valve for oil power machine |
| CN101769276A (en) * | 2008-12-30 | 2010-07-07 | 上海航天液压控制系统有限公司 | Quick unloading device for hydraulic servomotor |
| CN204403037U (en) * | 2015-01-07 | 2015-06-17 | 惠州市兴源自动化设备有限公司 | Punching oil cylinder |
| CN206830568U (en) * | 2017-05-24 | 2018-01-02 | 江苏华电吴江热电有限公司 | A kind of servomotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112377277A (en) * | 2020-11-27 | 2021-02-19 | 大唐陕西发电有限公司 | Push-pull rod sealing structure of steam turbine |
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| Publication number | Publication date |
|---|---|
| CN110260028B (en) | 2021-01-15 |
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