CN111237620A - Valve structure integrating pressure regulating valve and safety valve - Google Patents
Valve structure integrating pressure regulating valve and safety valve Download PDFInfo
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- CN111237620A CN111237620A CN201911073912.0A CN201911073912A CN111237620A CN 111237620 A CN111237620 A CN 111237620A CN 201911073912 A CN201911073912 A CN 201911073912A CN 111237620 A CN111237620 A CN 111237620A
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- valve
- spring
- valve core
- main valve
- lubricating oil
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- 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
- F16N—LUBRICATING
- F16N7/00—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated
- F16N7/38—Arrangements for supplying oil or unspecified lubricant from a stationary reservoir or the equivalent in or on the machine or member to be lubricated with a separate pump; Central lubrication systems
- F16N7/385—Central lubrication systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- 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
- F16N—LUBRICATING
- F16N23/00—Special adaptations of check valves
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Safety Valves (AREA)
Abstract
The invention belongs to a lubricating oil system of an aircraft engine lubricating oil system, and relates to a valve structure integrating a pressure regulating valve and a safety valve, which comprises a retainer ring (1), a valve plug (2), a small spring (3), a main valve core (4), a valve shell (5), an auxiliary valve core (6), a spiral retainer ring (7), a large spring (8), a spring pressing plate (9), a compression nut (10), an adjusting gasket (11), a sealing ring A (12), a sealing ring B (13), a sealing ring C (14) and the like. The device has the characteristics of compact structure and diversified functions, simplifies the structure of an aeroengine lubricating oil system, and lightens the weight of the engine.
Description
Technical Field
The invention belongs to the technical field of an aircraft engine lubricating oil system, and particularly relates to a lubricating oil pressure adjusting device of a lubricating oil system.
Background
The constant-pressure lubricating oil system of the aircraft engine needs to overflow part of lubricating oil supplied by a lubricating oil pump to an inlet of the lubricating oil pump or a lubricating oil tank through a pressure regulating valve, pipelines and accessories of the lubricating oil system have certain pressure bearing capacity, and when oil supply pipelines or accessories of the lubricating oil system are blocked or flow groups are large, pressure is relieved through a safety valve, so that the pipelines of the lubricating oil system are prevented from bursting, and the safety of the lubricating oil system is ensured. The pressure regulating valve and the safety valve are independently arranged in the previous lubricating oil system, so that the lubricating oil system has more accessories and more complex system structure, and is not beneficial to weight reduction and improvement of the power-weight ratio of an engine.
Disclosure of Invention
The purpose of the invention is: the invention relates to a lubricating oil pressure regulating device with a pressure regulating valve and a safety valve integrated; the technical problems of complexity degree of an engine lubricating oil system and weight reduction of the lubricating oil system are solved.
In order to solve the technical problem, the technical scheme of the invention is as follows: the pressure regulating valve and the safety valve share one valve core, two pressure sensing working chambers are arranged, the stress areas of the two working chambers are different, and the valve core moves by proper opening degree by sensing the lubricating oil pressure in the two working chambers, so that the pressure regulating valve and the safety valve are acted.
The technical scheme of the invention is as follows: a valve structure integrating a pressure regulating valve and a safety valve into a whole comprises a retainer ring 1, a valve plug 2, a small spring 3, a main valve element 4, a valve shell 5, an auxiliary valve element 6, a spiral retainer ring 7, a large spring 8, a spring pressing plate 9, a gland nut 10, an adjusting gasket 11, a sealing ring A12, a sealing ring B13 and a sealing ring C14, wherein the retainer ring 1 is arranged in a retainer ring groove on the left side of the valve shell 5 and used for limiting the axial position of the valve plug 2 in the valve shell 5, the main valve element 4 is arranged in an inner hole of the valve shell 5, and the excircle of the main valve element 4 is in small clearance fit with the inner hole of the valve; the small spring 3 is arranged between the valve plug 2 and the main valve core 4; the big spring 8 is sleeved on the right rod of the main valve core 4, and the right side of the big spring is limited by a spring pressing plate 9 and a compression nut 11 which are arranged on the main valve core 4.
The sealing ring A12 is installed on the valve shell 5 and used for isolating the working chamber C from the working chamber D, the sealing ring B13 is installed on the valve shell 5 and used for isolating the working chamber D from the working chamber E, and the sealing ring C14 is installed on the main valve core 4 and used for isolating the working chamber D from the working chamber E. The inner hole of the auxiliary valve core 6 is matched with the main valve core 4, the outer circle of the auxiliary valve core 6 is in clearance fit with the inner hole of the valve shell 5, the left side of the auxiliary valve core is limited by the main valve core 4, and the right side of the auxiliary valve core is limited by the spiral retainer ring 7 arranged in the retainer ring groove on the right side of the valve shell 5. An adjusting shim 11 is arranged between the small spring and the valve plug 2 and is used for adjusting the initial installation force of the small spring 3 on the main valve element 4. By adjusting the relative axial position of gland nut 11 and main spool 4, the initial installation height of large spring 8 can be adjusted. The left end face of the secondary valve core 6 is subjected to hydraulic pressure to cause the main valve core 4 and the secondary valve core 6 to move axially and separately relatively and overcome the spring force of the small spring 3 and the large spring 8. The valve belongs to a slide valve structure.
The invention has the technical effects that:
by adopting the pressure regulating valve, the flow regulation and pressure protection effects of the lubricating oil system of the aero-engine can be tested, the quantity of lubricating oil accessories of the pressure regulating valve and the safety valve of the lubricating oil system is reduced, the total weight is reduced, and the power-weight ratio of the engine is improved.
Drawings
FIG. 1 is a diagram showing a valve arrangement in a conventional lubricating oil system
FIG. 2 is a layout view of a lubricating oil system employing the pressure regulating-safety integrated valve structure of the present invention
FIG. 3 is a structural view of a pressure regulating-safety integrated valve of the present invention
Wherein, 1-check ring, 2-valve plug, 3-small spring, 4-main valve core, 5-valve shell, 6-auxiliary valve core, 7-spiral check ring, 8-large spring, 9-spring pressure plate, 10-gland nut, 11-adjusting shim, 12-seal ring A, 13-seal ring B, 14-seal ring C
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
FIG. 1 is a diagram showing the arrangement of a pressure regulating valve and a safety valve in a conventional lubricating oil system; FIG. 2 is a layout diagram of a lubricating oil system employing the pressure regulating-safety integrated valve structure of the present invention; FIG. 3 shows a pressure-regulating and safety integrated valve structure of the present invention, which comprises a retainer ring 1, a valve plug 2, a small spring 3, a main valve element 4, a valve housing 5, an auxiliary valve element 6, a spiral retainer ring 7, a large spring 8, a spring pressing plate 9, a gland nut 10, an adjusting gasket 11, a sealing ring A12, a sealing ring B13, a sealing ring C14, etc., wherein the retainer ring 1 is installed in a retainer ring groove on the left side of the valve housing 5 for limiting the axial position of the valve plug 2 in the valve housing 5, the main valve element 4 is installed in an inner hole of the valve housing 5, the outer circle of the main valve element 4 is in small clearance fit with the inner hole of the valve housing 5, the small spring 3 is installed between the valve plug 2 and the main valve element 4, the adjusting gasket 11 is used for adjusting the initial installation force of the small spring 3 acting on the main valve element 4, the inner hole of, the left side is limited by the main valve core 4, and the right side is limited by the spiral retainer ring 7 arranged in the retainer ring groove on the right side of the valve shell 5. The large spring 8 is sleeved on a right side rod of the main valve element 4, the right side is limited by a spring pressing plate 9 and a pressing nut 11 which are arranged on the main valve element 4, and the initial installation height of the large spring 8 can be adjusted by adjusting the relative axial position of the pressing nut 11 and the main valve element 4. And a sealing ring A12 is arranged on the valve shell 5 and used for isolating the working chamber C from the working chamber D, a sealing ring B13 is arranged on the valve shell 5 and used for isolating the working chamber D from the working chamber E, and a sealing ring C14 is arranged on the main valve core (4) and used for isolating the working chamber D from the working chamber E.
The working principle of the pressure regulating-safety integrated valve is as follows:
referring to fig. 2, the pressure regulating-safety integrated valve is arranged in a lubricating oil system, a cavity C is communicated with an inlet of a lubricating oil pump in the lubricating oil system, a cavity D is communicated with an outlet of the lubricating oil pump of an oil supply way, and a cavity E is communicated with accessories such as an oil filter, a radiator and the like of the oil supply way of the lubricating oil system.
1) Under normal working condition, it has the function of regulating pressure
When the lubricating oil filter works normally, accessory flow groups such as the lubricating oil filter, the radiator and the like are small. The valve D cavity and the valve E cavity both feel certain pressure, and the pressure difference between the two working cavities is small. At this time, the small spring 3 and the large spring 8 in the figure are in a pressed state, after the lubricating oil enters the cavity D, most of the lubricating oil is supplied to each nozzle after passing through the lubricating oil filter and the radiator, and one part of the lubricating oil returns to the front of the lubricating oil pump through overflowing to the cavity C. The specific stress condition is as follows
The auxiliary valve core 6 keeps balance under the conditions that a force (F oil C) which is applied to the D cavity oil and is applied to the right by a differential pressure in the area phi A-phi B, a force (F oil C1) which is applied to the E cavity oil and is applied to the left by the area phi A-phi B and a force (F big bullet) which is applied to the left by a big spring, namely the F oil C is equal to the F oil C1+ F big bullet; the main valve element 4 is balanced under the conditions that a leftward force (F oil D) of the oil pressure of the chamber D and a leftward force (F oil E2) of the oil pressure of the chamber E act on the area phi B, a rightward force (F small spring) of a small spring and a rightward force (F large spring) of a large spring are applied, namely F oil D + F oil E2 is equal to F small spring + F large spring;
from this, it can be seen that since the F oil D1+ F oil E2 is F small springs, the valve element opening degree when serving as the pressure regulating valve is only related to the compression amount of the small spring.
2) When the lubricating oil filter and the radiator are blocked or the flow resistance is large, the lubricating oil filter plays a role of a safety valve
When the oil pressure of the cavity D is far larger than that of the cavity E, the auxiliary valve core 6 moves rightwards to the position of the spiral retainer ring under the action of pressure difference, and the main valve core 4 moves leftwards. At this time, the auxiliary spool is balanced under the action of a force (F oil D) of the D cavity oil pressure to the right, a force (F retaining ring) of the spiral retaining ring to the left, a force (F big shot) of a big spring to the left and a force (F oil E1) of the E cavity oil pressure to the left under the area difference of phi A-phi B, namely F oil D is equal to F retaining ring + F big shot + F oil E1; the main valve core (spring base) is balanced under the leftward force (F oil D) of the oil pressure of the cavity D and the leftward force (F oil E2) of the oil pressure of the cavity E acting on the area phi B (F oil E), the rightward force (F small spring) of the small spring and the rightward force (F large spring) of the large spring, namely F oil D + F oil E2 is equal to F small spring + F large spring;
because the pressure of the cavity E is very small (0 in the limit case), F oil D is F small bullet + F large bullet, and the opening degree of the main valve core is related to the combined action of the small spring and the large spring when the pressure is safely released.
Compared with the figures 1 and 2, the pressure regulating-safety integrated valve has the advantages that two valves in the lubricating oil system in the figure 1 are simplified into one valve in the lubricating oil system in the figure 2, so that the number of the valves is reduced, the weight of the system is reduced, the failure rate of the system is reduced, and the reliability is improved.
Claims (8)
1. The utility model provides a valve structure that collection pressure regulating valve and safety valve are as an organic whole which characterized in that: the valve comprises a retainer ring (1), a valve plug (2), a small spring (3), a main valve core (4), a valve shell (5), an auxiliary valve core (6), a spiral retainer ring (7), a large spring (8), a spring pressing plate (9), a compression nut (10), an adjusting gasket (11), a sealing ring A (12), a sealing ring B (13) and a sealing ring C (14), wherein the retainer ring (1) is arranged in a retaining ring groove on the left side of the valve shell (5) and used for limiting the axial position of the valve plug (2) in the valve shell (5), the main valve core (4) is arranged in an inner hole of the valve shell (5), and the excircle of the main valve core (4) is in small clearance fit with the inner hole of the valve shell (5; the small spring (3) is arranged between the valve plug (2) and the main valve core (4); the big spring (8) is sleeved on the right rod of the main valve core (4), and the right side of the big spring is limited by a spring pressure plate (9) and a compression nut (11) which are arranged on the main valve core (4).
2. The shutter construction according to claim 1, characterized in that a seal a (12) is mounted on the shutter housing (5) for isolating the working chambers C and D, and a seal B (13) is mounted on the shutter housing (5) for isolating the working chambers D and E.
3. The valve structure according to claim 1, characterized in that the inner hole of the auxiliary valve core (6) is matched with the main valve core (4), the outer circle of the auxiliary valve core (6) is in clearance fit with the inner hole of the valve shell (5), the left side is limited by the main valve core (4), and the right side is limited by a spiral retainer ring (7) arranged in a retainer ring groove at the right side of the valve shell (5).
4. A shutter construction according to claim 1, characterised in that an adjustment washer (11) is arranged between the small spring and the shutter plug (2) for adjusting the initial setting force of the small spring (3) on the main valve element (4).
5. A shutter construction according to claim 1, characterised in that the initial mounting height of the large spring (8) can be adjusted by adjusting the relative axial position of the gland nut (11) and the main valve element (4).
6. The valve structure according to claim 1, characterized in that the hydraulic pressure on the left end face of the secondary valve core (6) causes the main valve core (4) and the secondary valve core (6) to move axially apart from each other and overcome the spring force of the small spring (3) and the large spring (8).
7. The shutter arrangement according to claim 1, wherein the shutter arrangement is a slide valve arrangement.
8. A shutter construction according to claim 1, characterised in that a sealing ring C (14) is mounted on the main valve element (4) for separating the working chambers D and E.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073912.0A CN111237620A (en) | 2019-11-05 | 2019-11-05 | Valve structure integrating pressure regulating valve and safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911073912.0A CN111237620A (en) | 2019-11-05 | 2019-11-05 | Valve structure integrating pressure regulating valve and safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111237620A true CN111237620A (en) | 2020-06-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911073912.0A Pending CN111237620A (en) | 2019-11-05 | 2019-11-05 | Valve structure integrating pressure regulating valve and safety valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN111237620A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009287742A (en) * | 2008-05-30 | 2009-12-10 | Shimadzu Corp | Priority valve |
| US20100126594A1 (en) * | 2008-11-21 | 2010-05-27 | Dana Canada Corporation | Thermal bypass valve with pressure relief capability |
| US20120031703A1 (en) * | 2010-08-06 | 2012-02-09 | Dropsa S.P.A. | Minimal lubrication device with fine regulation of the oil flow |
| CN203131397U (en) * | 2013-01-23 | 2013-08-14 | 中国航空动力机械研究所 | Pressure regulating and overpressure protection integrating device for lubricating oil system |
| CN103292146A (en) * | 2012-02-27 | 2013-09-11 | 德罗普萨股份公司 | Lubrication device with fluid lubricant flow rate regulation |
| CN203231060U (en) * | 2013-04-19 | 2013-10-09 | 中国建筑第二工程局有限公司 | Pressure maintaining lubricating device for concrete mixer |
| CN103721335A (en) * | 2013-12-13 | 2014-04-16 | 科迈（常州）电子有限公司 | Breathing machine overload relief valve with dual-protection function |
| CN108386702A (en) * | 2018-05-03 | 2018-08-10 | 浙江洁普斯清洁设备有限公司 | Reciprocating pneumatic valve and the cylinder and grease pump for using the valve |
-
2019
- 2019-11-05 CN CN201911073912.0A patent/CN111237620A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009287742A (en) * | 2008-05-30 | 2009-12-10 | Shimadzu Corp | Priority valve |
| US20100126594A1 (en) * | 2008-11-21 | 2010-05-27 | Dana Canada Corporation | Thermal bypass valve with pressure relief capability |
| US20120031703A1 (en) * | 2010-08-06 | 2012-02-09 | Dropsa S.P.A. | Minimal lubrication device with fine regulation of the oil flow |
| CN103292146A (en) * | 2012-02-27 | 2013-09-11 | 德罗普萨股份公司 | Lubrication device with fluid lubricant flow rate regulation |
| CN203131397U (en) * | 2013-01-23 | 2013-08-14 | 中国航空动力机械研究所 | Pressure regulating and overpressure protection integrating device for lubricating oil system |
| CN203231060U (en) * | 2013-04-19 | 2013-10-09 | 中国建筑第二工程局有限公司 | Pressure maintaining lubricating device for concrete mixer |
| CN103721335A (en) * | 2013-12-13 | 2014-04-16 | 科迈（常州）电子有限公司 | Breathing machine overload relief valve with dual-protection function |
| CN108386702A (en) * | 2018-05-03 | 2018-08-10 | 浙江洁普斯清洁设备有限公司 | Reciprocating pneumatic valve and the cylinder and grease pump for using the valve |
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Application publication date: 20200605 |
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| RJ01 | Rejection of invention patent application after publication |