CN109611247A - A kind of fuel oil collection device for preventing engine fuel from revealing - Google Patents

A kind of fuel oil collection device for preventing engine fuel from revealing Download PDF

Info

Publication number
CN109611247A
CN109611247A CN201811392602.0A CN201811392602A CN109611247A CN 109611247 A CN109611247 A CN 109611247A CN 201811392602 A CN201811392602 A CN 201811392602A CN 109611247 A CN109611247 A CN 109611247A
Authority
CN
China
Prior art keywords
chamber
hydraulic fluid
fluid port
piston
fuel
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
Application number
CN201811392602.0A
Other languages
Chinese (zh)
Other versions
CN109611247B (en
Inventor
贺炜炜
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC Aero Engine Xian Power Control Technology Co Ltd
Original Assignee
AECC Aero Engine Xian Power Control Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AECC Aero Engine Xian Power Control Technology Co Ltd filed Critical AECC Aero Engine Xian Power Control Technology Co Ltd
Priority to CN201811392602.0A priority Critical patent/CN109611247B/en
Publication of CN109611247A publication Critical patent/CN109611247A/en
Application granted granted Critical
Publication of CN109611247B publication Critical patent/CN109611247B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

The present invention relates to a kind of fuel oil collection devices for preventing engine fuel from revealing, including pipeline, collecting chamber and pilot valve；It is provided on the valve pocket of pilot valve and comes hydraulic fluid port, SERVO CONTROL hydraulic fluid port, the second chamber hydraulic fluid port and oil storage accent for low pressure oil return opening, fuel manifold；Piston is provided in collecting chamber, collecting chamber is divided into two chambers in left and right by piston, and left chamber is piston control chamber, and right chamber is shoe cream room；Piston side extends to form sealing partition, the sealing partition is located at piston control chamber, and seals partition and piston control chamber is divided into the first chamber and the second chamber, and the first chamber and atmospheric environment are linked up, second chamber passes through oil storage accent described in pipeline connection by the second chamber hydraulic fluid port described in pipeline connection, shoe cream room；After solving engine cut-off, the fuel oil expansion of the influence fuel manifold of heated backflow effeet etc. causes nozzle oil dripping, influences combustion chamber burner service life and efficiency of combustion, while being collected to excess fuel and also contributing to environmental protection.

Description

A kind of fuel oil collection device for preventing engine fuel from revealing
Technical field
The invention belongs to the design fields of fuel oil collection device, are related to a kind of fuel oil collection for preventing engine fuel from revealing Device.
Background technique
Country's military domain directly empties fuel manifold fuel oil after being all made of parking at present, is unfavorable for fuel manifold again Filling, while to environmental protection, there are risks for oil extraction, domestic civil engine field is temporarily without mature general pipeline fuel oil collection Device.
Summary of the invention
The purpose of the present invention: quasi- to use a kind of fuel oil collection device within the engine, which is installed on engine fuel General pipeline, mainly after the closing of engine cut-off fuel manifold coming oil, the residual fuel oil in fuel manifold is due to hot backflow effeet etc. When different reasons cause fuel manifold fuel oil to expand, expansion fuel oil is collected, it is ensured that the pressure of fuel manifold is no more than spray Mouth opens pressure set points, and expansion fuel oil is avoided to enter combustion chamber.
Technical solution of the present invention: a kind of fuel oil collection device for preventing engine fuel from revealing, including pipeline, collecting chamber And pilot valve；
It is provided on the valve pocket of pilot valve and comes hydraulic fluid port (B), SERVO CONTROL hydraulic fluid port for low pressure oil return opening (A), fuel manifold (C), the second chamber hydraulic fluid port (D) and oil storage accent (E)；
Piston is provided in collecting chamber, collecting chamber is divided into two chambers in left and right by piston, and left chamber is piston control chamber, right chamber For shoe cream room；Piston side extends to form sealing partition, and the sealing partition is located at piston control chamber, and seals partition for piston Control chamber is divided into the first chamber and the second chamber, and the first chamber and atmospheric environment are linked up, and the second chamber passes through the second chamber described in pipeline connection Hydraulic fluid port, shoe cream room pass through oil storage accent described in pipeline connection；
Fuel manifold carrys out hydraulic fluid port and is connected to fuel manifold, and low pressure oil return opening is connected to oil return line, the connection of servo control liquefaction To SERVO CONTROL hydraulic fluid port；
The spool of pilot valve switches between the first position and the second position, when engine cut-off, SERVO CONTROL Oil makes spool be located at the second position, and fuel manifold carrys out hydraulic fluid port while leading with the second chamber hydraulic fluid port (D) and oil storage accent (E) at this time Logical, low pressure oil return opening and SERVO CONTROL hydraulic fluid port are closed by spool；
When the engine operates, servo control liquefaction pushes spool to reach first position, so that fuel manifold carrys out hydraulic fluid port closing, SERVO CONTROL hydraulic fluid port is connected with the second chamber hydraulic fluid port, and low pressure oil return opening is connected with oil storage accent；
Wherein: PIt watches*SIt is small>PIt returns*SGreatly；PIt watchesStrong, the S for SERVO CONTROL oil pressureIt is smallFor forced area of the piston in the second chamber, PIt returnsFor Oil return line pressure, SGreatlyThe forced area for being piston in shoe cream room.
Working principle:
When engine work, SERVO CONTROL oil pressure is much higher than by force system oil return pressure, at this time pilot valve Spool is servo-controlled oil control and is located at first position.E mouthfuls are connected with A mouthfuls of low pressure oil ways, and E mouthfuls are cut off with B mouthfuls, so that shoe cream room It is disconnected with fuel manifold, while D mouthfuls of openings, servo control liquefaction enters the second chamber by D mouthfuls, due to PIt watches*SIt is small>PIt returns*SGreatly, make piston Extreme position is moved right, and shoe cream room and E oral groove are logical at this time, E mouthfuls are logical with A oral groove, the residual oil that can collect shoe cream room Liquid is discharged into oil return line, and shoe cream room is emptied, and schematic diagram is shown in Fig. 1.
After engine cut-off, temperature is higher in fuel manifold at this time, and fuel oil pressure increases, and pilot valve controls pressure Drop to close or identical with system oil return pressure, valve core reset is switched to the second position at this time, E mouthfuls with A mouthfuls of low pressure oil way Cutting, E mouthfuls lead to B mouthfuls of connections, collecting chamber shoe cream room and E oral groove, and shoe cream room and fuel manifold are connected, and shoe cream room enters collection shape State；It is also connected simultaneously with B mouthfuls for D mouthfuls, i.e., the second chamber is connected to fuel manifold and shoe cream room, since the first chamber is communicated with the atmosphere, combustion Oily general pipeline understands pressure release and fuel oil is drained into shoe cream room, while piston moves to left, and principle is shown in Fig. 2.
Preferably, reset spring is installed on the spool.
Beneficial effects of the present invention: after solving engine cut-off, the combustion of the influence fuel manifold of the backflow effeet etc. that is heated Oil expansion causes nozzle oil dripping, influences combustion chamber burner service life and efficiency of combustion, while being collected excess fuel to environment Protection also contributes.
Detailed description of the invention
Fig. 1 is first position schematic diagram of the invention；
Fig. 2 is second position schematic diagram of the invention；
Wherein: 1- atmosphere chamber, the second chamber of 2-, 3- shoe cream room, 4- piston, 5- collecting chamber, 6- pipeline, 7- pilot valve valve Set, 8- SERVO CONTROL valve core, 9- spring, 10- system low-voltage oil return line, 11- fuel manifold, 12- sealing ring.
Specific embodiment
Such as Fig. 1 and 2, a kind of fuel oil collection device for preventing engine fuel from revealing, including pipeline, collecting chamber and servo control Valve processed；
It is provided on the valve pocket of pilot valve and comes hydraulic fluid port (B), SERVO CONTROL hydraulic fluid port for low pressure oil return opening (A), fuel manifold (C), the second chamber hydraulic fluid port (D) and oil storage accent (E)；
Piston is provided in collecting chamber, collecting chamber is divided into two chambers in left and right by piston, and left chamber is piston control chamber, right chamber For shoe cream room；Piston side extends to form sealing partition, and the sealing partition is located at piston control chamber, and seals partition for piston Control chamber is divided into the first chamber and the second chamber, and the first chamber and atmospheric environment are linked up, and the second chamber passes through the second chamber described in pipeline connection Hydraulic fluid port, shoe cream room pass through oil storage accent described in pipeline connection；
Fuel manifold carrys out hydraulic fluid port and is connected to fuel manifold, and low pressure oil return opening is connected to oil return line, the connection of servo control liquefaction To SERVO CONTROL hydraulic fluid port；
The spool of pilot valve switches between the first position and the second position, when engine cut-off, SERVO CONTROL Oil makes spool be located at the second position, and fuel manifold carrys out hydraulic fluid port while leading with the second chamber hydraulic fluid port (D) and oil storage accent (E) at this time Logical, low pressure oil return opening and SERVO CONTROL hydraulic fluid port are closed by spool；
When the engine operates, servo control liquefaction pushes spool to reach first position, so that fuel manifold carrys out hydraulic fluid port closing, SERVO CONTROL hydraulic fluid port is connected with the second chamber hydraulic fluid port, and low pressure oil return opening is connected with oil storage accent；
Wherein: PIt watches*SIt is small>PIt returns*SGreatly；PIt watchesStrong, the S for SERVO CONTROL oil pressureIt is smallFor forced area of the piston in the second chamber, PIt returnsFor Oil return line pressure, SGreatlyThe forced area for being piston in shoe cream room.
Working principle:
When engine work, SERVO CONTROL oil pressure is much higher than by force system oil return pressure, at this time pilot valve Spool is servo-controlled oil control and is located at first position.E mouthfuls are connected with A mouthfuls of low pressure oil ways, and E mouthfuls are cut off with B mouthfuls, so that shoe cream room It is disconnected with fuel manifold, while D mouthfuls of openings, servo control liquefaction enters the second chamber by D mouthfuls, due to PIt watches*SIt is small>PIt returns*SGreatly, make piston Extreme position is moved right, and shoe cream room and E oral groove are logical at this time, E mouthfuls are logical with A oral groove, the residual oil that can collect shoe cream room Liquid is discharged into oil return line, and shoe cream room is emptied, and schematic diagram is shown in Fig. 1.
After engine cut-off, temperature is higher in fuel manifold at this time, and fuel oil pressure increases, and pilot valve controls pressure Drop to close or identical with system oil return pressure, valve core reset is switched to the second position at this time, E mouthfuls with A mouthfuls of low pressure oil way Cutting, E mouthfuls lead to B mouthfuls of connections, collecting chamber shoe cream room and E oral groove, and shoe cream room and fuel manifold are connected, and shoe cream room enters collection shape State；It is also connected simultaneously with B mouthfuls for D mouthfuls, i.e., the second chamber is connected to fuel manifold and shoe cream room, since the first chamber is communicated with the atmosphere, combustion Oily general pipeline understands pressure release and fuel oil is drained into shoe cream room, while piston moves to left, and principle is shown in Fig. 2.

Claims (2)

1. a kind of fuel oil collection device for preventing engine fuel from revealing, including pipeline, collecting chamber and pilot valve；
Be provided on the valve pocket of pilot valve for low pressure oil return opening (A), fuel manifold come hydraulic fluid port (B), SERVO CONTROL hydraulic fluid port (C), Second chamber hydraulic fluid port (D) and oil storage accent (E)；
Piston is provided in collecting chamber, collecting chamber is divided into two chambers in left and right by piston, and left chamber is piston control chamber, and right chamber is storage Oil pocket；Piston side extends to form sealing partition, and the sealing partition is located at piston control chamber, and seals partition and control piston Chamber is divided into the first chamber and the second chamber, and the first chamber and atmospheric environment are linked up, and the second chamber passes through the second chamber hydraulic fluid port described in pipeline connection, Shoe cream room passes through oil storage accent described in pipeline connection；
Fuel manifold carrys out hydraulic fluid port and is connected to fuel manifold, and low pressure oil return opening is connected to oil return line, and servo control liquefaction, which is communicated to, to be watched Take control port；
The spool of pilot valve switches between the first position and the second position, and when engine cut-off, servo control liquefaction makes It obtains spool and is located at the second position, fuel manifold carrys out hydraulic fluid port while being connected with the second chamber hydraulic fluid port (D) and oil storage accent (E) at this time, low It pushes back hydraulic fluid port and SERVO CONTROL hydraulic fluid port is closed by spool；
When the engine operates, servo control liquefaction pushes spool to reach first position, so that fuel manifold comes hydraulic fluid port closing, servo Control port is connected with the second chamber hydraulic fluid port, and low pressure oil return opening is connected with oil storage accent；
Wherein: P watch * S it is small > P return * S it is big；P watch for SERVO CONTROL oil pressure it is strong, S it is small be forced area of the piston in the second chamber, P Return is oil return line pressure, forced area of the S greatly piston in shoe cream room.
2. a kind of fuel oil collection device for preventing engine fuel from revealing according to claim 1, it is characterized in that: the valve Reset spring is installed on core.
CN201811392602.0A 2018-11-21 2018-11-21 Fuel oil collecting device for preventing fuel oil leakage of engine Active CN109611247B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811392602.0A CN109611247B (en) 2018-11-21 2018-11-21 Fuel oil collecting device for preventing fuel oil leakage of engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811392602.0A CN109611247B (en) 2018-11-21 2018-11-21 Fuel oil collecting device for preventing fuel oil leakage of engine

Publications (2)

Publication Number Publication Date
CN109611247A true CN109611247A (en) 2019-04-12
CN109611247B CN109611247B (en) 2020-12-29

Family

ID=66003376

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811392602.0A Active CN109611247B (en) 2018-11-21 2018-11-21 Fuel oil collecting device for preventing fuel oil leakage of engine

Country Status (1)

Country Link
CN (1) CN109611247B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096865A (en) * 2020-09-08 2020-12-18 中国航发沈阳黎明航空发动机有限责任公司 Double-linkage back-to-back assembled elastic sealing structure for aero-engine
CN114000957A (en) * 2021-01-25 2022-02-01 辉腾交通器材(安徽)有限公司 Adjustable piston for motorcycle

Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020632A (en) * 1975-07-17 1977-05-03 The United States Of America As Represented By The United States National Aeronautics And Space Administration Office Of General Counsel-Code Gp Oil cooling system for a gas turbine engine
US4066386A (en) * 1975-09-06 1978-01-03 Rolls-Royce Limited Priming systems for pumps
US4300347A (en) * 1979-03-01 1981-11-17 Lucas Industries Limited Shut-off valve arrangement for a gas turbine engine fuel
US4719749A (en) * 1985-06-13 1988-01-19 Mtu Motoren-Und Turbinen-Union Muenchen Gmbh Valve for a fluid flow engine
US5235806A (en) * 1989-10-17 1993-08-17 Pickard Gerald W Fuel flow system for a gas turbine engine
CN1150220A (en) * 1995-08-30 1997-05-21 罗伯特-博希股份公司 Fuel injecting system
US6205766B1 (en) * 1997-07-11 2001-03-27 Lucas Industries Fluid flow valve and fluid flow system
US20020184884A1 (en) * 2001-06-08 2002-12-12 Honeywell International, Inc. Rapid shutdown and ecology system
US20030110775A1 (en) * 2001-12-14 2003-06-19 Woodward Governor Company Ecology valve and system in an aircraft engine fuel system
US20030233823A1 (en) * 2002-06-25 2003-12-25 Futa Paul W. Flow divider and ecology valve
CN101128662A (en) * 2005-02-17 2008-02-20 伊斯帕诺-絮扎公司 Aircraft engine fuel supply
US20080236549A1 (en) * 2007-03-27 2008-10-02 Goodrich Control Systems Limited Fuel System
CN101435376A (en) * 2007-11-13 2009-05-20 通用汽车环球科技运作公司 Internal combustion engine starting system and method
CN101586498A (en) * 2008-05-20 2009-11-25 福特环球技术公司 Reduce the overheated method of direct fuel injection sparger
EP2541023A2 (en) * 2011-06-28 2013-01-02 Goodrich Pump & Engine Control Systems, Inc. Ecology valve for draining a manifold of a gas turbine engine, fuel system and method for draining fuel
CN102953870A (en) * 2011-08-11 2013-03-06 通用汽车环球科技运作有限责任公司 Fuel storage system for vehicle
CN104653362A (en) * 2013-11-22 2015-05-27 中国航空工业集团公司西安飞机设计研究所 System for supplying oil to engine and hydraulically cooling during engine test
CN104937241A (en) * 2013-01-18 2015-09-23 通用电气公司 Dual pump/dual bypass fuel pumping system
CN105745498A (en) * 2013-11-20 2016-07-06 斯奈克玛 Multi-point injection device for an aircraft engine
CN205689340U (en) * 2016-06-21 2016-11-16 中航商用航空发动机有限责任公司 Aero-engine parking jettison gear, oil supply system and aero-engine
CN206439115U (en) * 2016-11-29 2017-08-25 中国航发商用航空发动机有限责任公司 Aero-engine parking defuelling system
CN108708796A (en) * 2017-12-29 2018-10-26 南岳电控（衡阳）工业技术股份有限公司 A kind of Pressure Limiter of High-pressure Common Rail System control method

Patent Citations (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020632A (en) * 1975-07-17 1977-05-03 The United States Of America As Represented By The United States National Aeronautics And Space Administration Office Of General Counsel-Code Gp Oil cooling system for a gas turbine engine
US4066386A (en) * 1975-09-06 1978-01-03 Rolls-Royce Limited Priming systems for pumps
US4300347A (en) * 1979-03-01 1981-11-17 Lucas Industries Limited Shut-off valve arrangement for a gas turbine engine fuel
US4719749A (en) * 1985-06-13 1988-01-19 Mtu Motoren-Und Turbinen-Union Muenchen Gmbh Valve for a fluid flow engine
US5235806A (en) * 1989-10-17 1993-08-17 Pickard Gerald W Fuel flow system for a gas turbine engine
CN1150220A (en) * 1995-08-30 1997-05-21 罗伯特-博希股份公司 Fuel injecting system
US6205766B1 (en) * 1997-07-11 2001-03-27 Lucas Industries Fluid flow valve and fluid flow system
US20020184884A1 (en) * 2001-06-08 2002-12-12 Honeywell International, Inc. Rapid shutdown and ecology system
US20030110775A1 (en) * 2001-12-14 2003-06-19 Woodward Governor Company Ecology valve and system in an aircraft engine fuel system
US20030233823A1 (en) * 2002-06-25 2003-12-25 Futa Paul W. Flow divider and ecology valve
CN101128662A (en) * 2005-02-17 2008-02-20 伊斯帕诺-絮扎公司 Aircraft engine fuel supply
US20080236549A1 (en) * 2007-03-27 2008-10-02 Goodrich Control Systems Limited Fuel System
CN101435376A (en) * 2007-11-13 2009-05-20 通用汽车环球科技运作公司 Internal combustion engine starting system and method
CN101586498A (en) * 2008-05-20 2009-11-25 福特环球技术公司 Reduce the overheated method of direct fuel injection sparger
EP2541023A2 (en) * 2011-06-28 2013-01-02 Goodrich Pump & Engine Control Systems, Inc. Ecology valve for draining a manifold of a gas turbine engine, fuel system and method for draining fuel
CN102953870A (en) * 2011-08-11 2013-03-06 通用汽车环球科技运作有限责任公司 Fuel storage system for vehicle
CN104937241A (en) * 2013-01-18 2015-09-23 通用电气公司 Dual pump/dual bypass fuel pumping system
CN105745498A (en) * 2013-11-20 2016-07-06 斯奈克玛 Multi-point injection device for an aircraft engine
CN104653362A (en) * 2013-11-22 2015-05-27 中国航空工业集团公司西安飞机设计研究所 System for supplying oil to engine and hydraulically cooling during engine test
CN205689340U (en) * 2016-06-21 2016-11-16 中航商用航空发动机有限责任公司 Aero-engine parking jettison gear, oil supply system and aero-engine
CN206439115U (en) * 2016-11-29 2017-08-25 中国航发商用航空发动机有限责任公司 Aero-engine parking defuelling system
CN108708796A (en) * 2017-12-29 2018-10-26 南岳电控（衡阳）工业技术股份有限公司 A kind of Pressure Limiter of High-pressure Common Rail System control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112096865A (en) * 2020-09-08 2020-12-18 中国航发沈阳黎明航空发动机有限责任公司 Double-linkage back-to-back assembled elastic sealing structure for aero-engine
CN114000957A (en) * 2021-01-25 2022-02-01 辉腾交通器材(安徽)有限公司 Adjustable piston for motorcycle
CN114000957B (en) * 2021-01-25 2023-02-03 辉腾交通器材(安徽)有限公司 Adjustable piston for motorcycle

Also Published As

Publication number Publication date
CN109611247B (en) 2020-12-29

Similar Documents

Publication Publication Date Title
CN109611247A (en) A kind of fuel oil collection device for preventing engine fuel from revealing
CN103590943A (en) Automotive diesel oil supplying system
CN102373689A (en) High-pressure waterway control system
EP2917585A1 (en) Variable displacement lubricant pump
CN203892648U (en) Differential safety valve and oil inlet connecting plate assembly with same
CN210565418U (en) Novel energy storage type hydraulic control integrated system for quick shut-off valve
CN209521676U (en) The electrichydraulic control trailer braking protection valve mechanism and tractor of Tractor-trailer combinatios
CN105864138A (en) Rapid hammer returning device
US9416732B2 (en) Engine manifold drain system
CN202545391U (en) Integrated multiplex reversing valve
CN209068149U (en) A kind of chip stepwise type distributor
CN203640805U (en) Bypass valve and bypass protection structure of engine crankcase ventilation system
CN202768203U (en) Novel decompression oil nozzle assembly
CN210218870U (en) Novel hydraulic integrated execution control device for quick shut-off valve of steam turbine
CN202176910U (en) High-pressure waterway control system
RU213649U1 (en) Gas turbine engine fuel supply system
CN201407223Y (en) Improved priority unloading valve
CN205779395U (en) Combined electromagnetic oil spout supercharging piezoelectricity jet hybrid fuel jet device
CN205714521U (en) Combined mechanical oil spout-supercharging piezoelectricity jet hybrid fuel jet device
CN204372255U (en) There is the water switch of pressure-reducing function
CN204756235U (en) Coupling that area cut off function
CN102815008A (en) Novel hydraulic mechanism of two hydraulic systems
CN204533022U (en) A kind of pressure-gradient control valve be directly fixedly connected with commutator
CN204828109U (en) Be applied to mechanical open -type check valve on second grade telescope in sequence hydro -cylinder
CN217107962U (en) Pneumatic oil pressure brake control device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
CB03 Change of inventor or designer information

Inventor after: He Weiwei

Inventor after: Ding Yan

Inventor after: Liu Zhansheng

Inventor after: Liao Shengzhu

Inventor after: Zhang Longtao

Inventor after: Jia Jia

Inventor before: He Weiwei

CB03 Change of inventor or designer information
GR01 Patent grant
GR01 Patent grant