CN114109611B - Piston type oil distributing valve assembly with double-spring structure - Google Patents
Piston type oil distributing valve assembly with double-spring structure Download PDFInfo
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- CN114109611B CN114109611B CN202111310809.0A CN202111310809A CN114109611B CN 114109611 B CN114109611 B CN 114109611B CN 202111310809 A CN202111310809 A CN 202111310809A CN 114109611 B CN114109611 B CN 114109611B
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- distributing valve
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- bushing
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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
- F02C7/22—Fuel supply systems
- F02C7/232—Fuel valves; Draining valves or systems
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Abstract
The invention discloses a piston type oil distributing valve assembly with a double-spring structure, which comprises an outer bushing and a screw sleeve; a valve bushing is assembled in the outer bushing in an interference manner, and an oil distributing valve is movably assembled in the valve bushing; a pair of main oil way type holes are symmetrically formed on the outer bushing and the valve bushing, a pair of auxiliary oil way type holes are formed on the outer bushing and the valve bushing at two sides of the main oil way type holes, and the positions of the auxiliary oil way type holes are closer to the front end of the outer bushing than the positions of the main oil way type holes; the rear end face of the valve bushing is connected with a small spring seat and is provided with a small spring; the large spring is assembled in the screw sleeve. The invention optimizes the space of the oil distributing valve by utilizing the structural advantages of the double springs, quickens the opening response speed of the bushing type hole, increases the control precision of the oil distributing valve and reduces the volume and weight of the spring of the oil distributing valve; the oil distributing valve adopts a piston structure, and converts the pressure area at the inlet of the oil distributing valve into the area of the piston rod, so that the pressure value at the inlet of the oil distributing valve is reduced.
Description
Technical Field
The invention relates to a mechanical hydraulic element, in particular to a piston type oil distributing valve assembly with a double-spring structure.
Background
The oil distributing valve assembly in the fuel control system of the aeroengine is an important component of the fuel regulator of the aeroengine, and the oil distributing valve assembly has the functions of enabling the positions of the oil distributing valves to be changed continuously through force balance at two ends of the oil distributing valves, and a boss on the oil distributing valve shields or opens an oil hole on a bushing of the oil distributing valve, so that the oil holes on the bushing are mutually disconnected or communicated to control the fuel flow to different oil ways.
In order to meet the requirement of the oil distributing valve assembly on the fuel flow of different oil ways, the oil hole opening time sequence and the opening pressure on the oil distributing valve bushing need to be accurately controlled, the traditional oil distributing valve assembly adopts a single spring structure, and the structure has poor control precision and slow response time and cannot meet the different opening time sequences of the holes; in order to ensure the force balance at the two ends of the oil distributing valve, the pressure difference between the front cavity and the rear cavity of the oil distributing valve is ensured by the spring force generated after the spring is compressed, and when the pressure difference is large, the common oil distributing valve assembly needs to use the oil distributing valve spring with larger valve diameter and larger stiffness coefficient, so that the valve and the spring are relatively large in volume, the volume and the weight of a product are increased, and the product design is not facilitated.
The existing oil distributing valve assembly can realize the distribution function of fuel flow, but has the advantages of relatively single structure, large volume and large weight, cannot meet the fuel distribution characteristics of different oil ways, cannot respond to the use requirement quickly, can only change corresponding technical indexes, brings inconvenience to the adjustment of product design, and greatly increases the development difficulty of products.
Disclosure of Invention
The invention aims to provide a piston type oil distributing valve assembly with a double-spring structure, which is used for solving the problems of overlarge structure and high design difficulty of a large-pressure oil distributing valve spring in the existing valve assembly.
In order to realize the tasks, the invention adopts the following technical scheme:
a piston type oil distributing valve assembly with a double-spring structure comprises an outer bushing and a threaded sleeve;
a valve bushing is assembled in the outer bushing in an interference manner, and an oil distributing valve is movably assembled in the valve bushing; the rear end of the valve bushing is provided with an assembly hole, and a piston rod of the oil distributing valve is in clearance fit with the assembly hole; the front end of a piston rod of the oil distributing valve is provided with a cylindrical piston type decompression section, and the end surface of the piston type decompression section is provided with an oil passing hole which is communicated with an oil inlet cavity and a decompression cavity; the outer lining and the valve lining are provided with oil inlet holes for leading fuel oil after the metering valve of the fuel oil control system is arranged, and the oil inlet holes are communicated with the oil inlet cavity; the end part of the oil inlet cavity is connected with a fuel regulator of a fuel control system through a pipe joint;
a pair of main oil way type holes are symmetrically formed on the outer bushing and the valve bushing, a pair of auxiliary oil way type holes are formed on the outer bushing and the valve bushing at two sides of the main oil way type holes, and the positions of the auxiliary oil way type holes are closer to the front end of the outer bushing than the positions of the main oil way type holes;
a small spring seat is connected to the rear end face of the valve bushing; the rear end of the oil distributing valve is provided with an assembly section, and the small spring seat is sleeved on the assembly section and is fixed with the small spring seat through a buckle; the small spring seat is provided with a small spring;
the large spring is assembled in the screw sleeve, the large spring seat is arranged at the front end in the screw sleeve, and the front end of the large spring seat is supported on the rear end face of the valve bushing through the annular base; the large spring seat is of a cap-shaped structure, and an oil guide hole is formed in the end face of the inner cavity of the large spring seat; the front end of the large spring is pressed on the large spring seat, and the rear end of the large spring is adjusted in position through the spring support.
Further, during assembly, the outer lining is sleeved in the installation shell of the fuel control system, and the front end of the screw sleeve is screwed into the installation shell in a threaded fit mode, so that connection and sealing with the rear end of the outer lining are achieved.
Further, the piston type decompression section divides the valve bushing into an oil inlet cavity positioned at the front end of the piston type decompression section and a decompression cavity positioned at the rear end of the piston type decompression section.
Further, the diameter of the piston decompression section is greater than the diameter of the piston rod.
Further, the main oil way hole and the auxiliary oil way hole are respectively connected with a main nozzle and an auxiliary nozzle of the engine; the auxiliary oil way holes and the main oil way holes are distributed on the outer bushing and the valve bushing at intervals of 90 degrees.
Further, one end of the small spring is fixed on the small spring seat, and the other end of the small spring is supported in the inner cavity of the large spring seat.
Further, the stiffness coefficient of the large spring is larger than that of the small spring.
Further, an adjusting screw cover is arranged on the rear end face of the screw sleeve, and an adjusting screw penetrates through the adjusting screw cover to be connected with the spring support.
Further, fuel flows into the oil inlet cavity through the inlet of the oil distributing valve, the oil distributing valve moves rightwards under the action of oil pressure, the auxiliary oil way type holes and the main oil way type holes are sequentially opened, the fuel flows into the pressure reducing cavity through the uniformly distributed oil passing holes, the stress area of the oil distributing valve is reduced to the cross section area of the piston rod from the cross section area of the oil inlet cavity by the pressure reducing cavity, and the pressure reducing effect is realized.
Further, when the flow rate of the oil inlet cavity starts to increase, the oil distributing valve starts to move to overcome the elasticity of the small spring, so that the auxiliary oil way hole is opened relatively quickly; as the pressure of the incoming oil chamber continues to increase, the main oil passage type orifice opens when the fuel flow increases to the minimum opening pressure of the main oil passage type orifice; the small spring seat moves along with the oil distributing valve until the small spring seat is stopped against the large spring seat, and the oil distributing valve continues to move right to overcome the acting force of the large spring, so that the flow distribution and pressure difference requirements of the oil distributing valve assembly under the condition of large flow are met.
Compared with the prior art, the invention has the following technical characteristics:
the invention optimizes the space of the oil distributing valve by utilizing the structural advantages of the double springs, quickens the opening response speed of the bushing type hole, increases the control precision of the oil distributing valve and reduces the volume and weight of the spring of the oil distributing valve; the oil distributing valve adopts a piston structure, and converts the pressure area at the inlet of the oil distributing valve into the area of the piston rod, so that the pressure value at the inlet of the oil distributing valve is reduced.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
fig. 2 is a diagram of the piston chamber structure of the oil distributing valve.
The reference numerals in the figures illustrate: the oil distributing valve comprises an outer bushing 1, a valve bushing 2, an oil distributing valve 3, a small spring seat 4, a screw sleeve 5, an adjusting screw 6, an adjusting screw cover 7, a small spring 8, a large spring seat 9, a large spring 10, a spring support 11, a decompression cavity 12, an oil passing hole 13, an oil inlet hole 14, an oil inlet cavity 15, a piston decompression section 16, a base 17, an oil guide hole 18, an auxiliary oil way type hole 19, a main oil way type hole 20 and a piston rod 21.
Detailed Description
On the basis of the traditional oil distributing valve 3 assembly, the structure of the traditional oil distributing valve 3 is improved to the piston type oil distributing valve 3, and on the premise of ensuring the maximum oil supply amount and the flow velocity in the valve, the piston type structure can offset part of the pressure at the inlet of the oil distributing valve 3, so that the stress area of the oil distributing valve 3 is reduced, and the oil distributing valve has a decompression function; by utilizing the structure of the double springs, the small springs 8 are responsible for opening the oil way holes faster, the response speed of the oil distributing valve 3 is improved, and when the oil distributing valve 3 moves to the maximum compression amount regulated by the small springs 8, the oil distributing valve 3 overcomes the spring acting force of the large valve and continuously moves so as to ensure the fuel quantity requirement of each oil way.
Referring to the drawings, the invention discloses a piston type oil distributing valve assembly with a double-spring structure, which comprises an outer bushing 1 and a threaded sleeve 5, wherein when the piston type oil distributing valve assembly is assembled, the outer bushing 1 is arranged in an installation shell of a fuel control system, and the front end of the threaded sleeve 5 is screwed into the installation shell in a threaded fit manner to realize connection and sealing with the rear end of the outer bushing 1;
a valve bushing 2 is assembled in the outer bushing 1 in an interference manner, and an oil distributing valve 3 is movably assembled in the valve bushing 2; the rear end of the valve bushing 2 is provided with an assembly hole, and a piston rod 21 of the oil distributing valve 3 is in clearance fit with the assembly hole; the front end of a piston rod 21 of the oil distributing valve 3 is provided with a cylindrical piston type decompression section 16, and the piston type decompression section 16 divides the valve bushing 2 into an oil inlet cavity 15 positioned at the front end of the piston type decompression section 16 and a decompression cavity 12 positioned at the rear end of the piston type decompression section; an oil passing hole 13 which is communicated with the oil inlet cavity 15 and the decompression cavity 12 is formed in the end face of the piston decompression section 16; wherein the diameter of the piston decompression section 16 is larger than the diameter of the piston rod 21; the outer lining 1 and the valve lining 2 are provided with oil inlet holes 14 for leading in fuel oil after the metering valve of the fuel oil control system, and the oil inlet holes 14 are communicated with the oil inlet cavity 15; the end of the oil inlet chamber 15 is connected with a fuel regulator of the fuel control system through a pipe joint.
A pair of main oil way type holes 20 are symmetrically formed on the outer lining 1 and the valve bushing 2, a pair of auxiliary oil way type holes 19 are formed on the outer lining 1 and the valve bushing 2 at two sides of the main oil way type holes 20, and the main oil way type holes 20 and the auxiliary oil way type holes 19 are respectively connected with a main nozzle and an auxiliary nozzle of an engine; the auxiliary oil way holes 19 and the main oil way holes 20 are distributed on the outer bushing 1 and the valve bushing 2 at intervals of 90 degrees; the secondary oil passage type hole 19 is located closer to the front end of the outer liner 1 than the primary oil passage type hole 20. The purpose of the staggered arrangement is that when the piston type decompression section 16 of the oil distributing valve 3 moves, the auxiliary oil channel type hole 19 is opened firstly, and then the main oil channel type hole 20 is opened, so that the oil supply requirement of the engine is met.
A small spring seat 4 is connected to the rear end face of the valve bushing 2; the rear end of the oil distributing valve 3 is provided with an assembly section, and the small spring seat 4 is sleeved on the assembly section and fixed with the small spring seat 4 through a buckle; the small spring seat 4 is provided with a small spring 8, wherein one end of the small spring 8 is fixed on the small spring seat 4, and the other end is supported in the inner cavity of the large spring seat 9.
The large spring 10 is assembled in the screw sleeve 5, and the stiffness coefficient of the large spring 10 is larger than that of the small spring 8; the large spring seat 9 is arranged at the front end in the screw sleeve 5, and the front end of the large spring seat 9 is supported on the rear end surface of the valve bushing 2 through the annular base 17; the large spring seat 9 is of a cap-shaped structure, and an oil guide hole 18 is formed in the end face of the inner cavity of the large spring seat 9; the front end of the large spring 10 is pressed on the large spring seat 9, and the rear end of the large spring 10 is adjusted in position through a spring support 11; an adjusting screw cover 7 is arranged on the rear end face of the screw sleeve 5, and the adjusting screw 6 penetrates through the adjusting screw cover 7 to be connected with a spring support 11.
Fig. 1 shows that the piston type oil distributing valve 3 with the double-spring structure adopts a piston type structure, as shown in fig. 2, fuel flows into the oil inlet cavity 15 through an inlet of the oil distributing valve 3, the oil distributing valve 3 moves rightwards under the oil pressure, the auxiliary oil path hole 19 and the main oil path hole 20 are sequentially opened, the fuel flows into the decompression cavity 12 through the uniformly distributed oil passing holes 13, the stress area of the oil distributing valve 3 is reduced to the cross section area of the piston rod 21 from the cross section area of the oil inlet cavity 15 by the decompression cavity 12, and the decompression effect is realized, as shown in fig. 2.
When the flow of the oil inlet cavity starts to be increased, the oil distributing valve 3 starts to move to overcome the elasticity of the small spring 8, and the auxiliary oil channel hole 19 can be opened faster due to the small rigidity of the small spring 8, so that the opening response speed of the auxiliary oil channel hole 19 is improved; as the pressure of the oil chamber continues to increase, the main-oil-passage type hole 20 opens when the fuel flow rate increases to the minimum opening pressure of the main-oil-passage type hole 20. The small spring seat 4 moves along with the oil distributing valve 3 until the small spring seat is stopped against the large spring seat 9, and after that, the oil distributing valve 3 continues to move right to overcome the acting force of the large spring 10, and the large spring 10 has higher rigidity, so that the flow distribution and pressure difference requirements of the oil distributing valve 3 assembly under the condition of large flow can be met.
The invention realizes the structural optimization design of the large-flow large-pressure-difference oil distributing valve 3 assembly, and ensures the opening time sequence of different oil way holes and the distribution characteristic of the fuel flow. The invention is used on a certain type of fuel oil distributor, and can well meet the performance requirement and the service life requirement of products through multiple test runs and checks of the whole service life of the engine.
The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced equally; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application, and are intended to be included in the scope of the present application.
Claims (7)
1. A piston type oil distributing valve assembly with a double-spring structure, wherein the oil distributing valve assembly is used for controlling fuel of an aeroengine; the novel screw sleeve is characterized by comprising an outer bushing (1) and a screw sleeve (5);
a valve bushing (2) is assembled in the outer bushing (1) in an interference manner, and an oil distributing valve (3) is movably assembled in the valve bushing (2); the rear end of the valve bushing (2) is provided with an assembly hole, and a piston rod (21) of the oil distributing valve (3) is in clearance fit with the assembly hole; the front end of a piston rod (21) of the oil distributing valve (3) is provided with a cylindrical piston type decompression section (16), and the end surface of the piston type decompression section (16) is provided with an oil passing hole (13) which is communicated with an oil inlet cavity (15) and a decompression cavity (12); an oil inlet hole (14) for guiding fuel oil after metering a valve of a fuel oil control system is formed in the outer lining (1) and the valve lining (2), and the oil inlet hole (14) is communicated with the oil inlet cavity (15); the end part of the oil inlet cavity (15) is connected with a fuel regulator of a fuel control system through a pipe joint;
a pair of main oil way type holes (20) are symmetrically formed in the outer lining (1) and the valve bushing (2), a pair of auxiliary oil way type holes (19) are formed in the outer lining (1) and the valve bushing (2) on two sides of the main oil way type holes (20), and the positions of the auxiliary oil way type holes (19) are closer to the front end of the outer lining (1) than the positions of the main oil way type holes (20); the main oil way hole (20) and the auxiliary oil way hole (19) are respectively connected with a main nozzle and an auxiliary nozzle of the engine; the auxiliary oil way holes (19) and the main oil way holes (20) are distributed on the outer bushing (1) and the valve bushing (2) at intervals of (90);
a small spring seat (4) is connected to the rear end surface of the valve bushing (2); the rear end of the oil distributing valve (3) is provided with an assembly section, and the small spring seat (4) is sleeved on the assembly section and fixed with the small spring seat (4) through a buckle; a small spring seat (4) is provided with a small spring (8);
the large spring (10) is assembled in the screw sleeve (5), the large spring seat (9) is arranged at the front end in the screw sleeve (5), and the front end of the large spring seat (9) is supported on the rear end face of the valve bushing (2) through the annular base (17); the large spring seat (9) is of a cap-shaped structure, and an oil guide hole (18) is formed in the end face of the inner cavity of the large spring seat (9); the front end of the large spring (10) is pressed on the large spring seat (9), and the rear end of the large spring (10) is adjusted in position through the spring support (11);
the fuel flows into the oil inlet cavity (15) through the inlet of the oil distributing valve (3), the oil distributing valve (3) moves rightwards under the action of oil pressure, the auxiliary oil way type hole (19) and the main oil way type hole (20) are sequentially opened, the fuel flows into the decompression cavity (12) through the uniformly distributed oil passing holes (13), the stress area of the oil distributing valve (3) is reduced to the cross section area of the piston rod (21) from the cross section area of the oil inlet cavity (15) by the decompression cavity (12), and the decompression effect is realized;
when the flow rate of the oil inlet cavity starts to increase, the oil distributing valve (3) starts to move to overcome the elasticity of the small spring (8) so as to open the auxiliary oil way hole (19); as the pressure of the incoming oil chamber continues to increase, the main oil passage type hole (20) opens when the fuel flow rate increases to the minimum opening pressure of the main oil passage type hole (20); the small spring seat (4) moves along with the oil distributing valve (3) until the small spring seat is stopped against the large spring seat (9), and then the oil distributing valve (3) continues to move right to overcome the acting force of the large spring (10), so that the flow distribution and pressure difference requirements of an oil distributing valve (3) assembly under the condition of large flow are met.
2. The piston type oil distributing valve assembly with the double spring structure according to claim 1, wherein the outer liner (1) is arranged in a mounting shell of the fuel control system during assembly, and the front end of the screw sleeve (5) is screwed into the mounting shell in a threaded fit mode, so that connection and sealing with the rear end of the outer liner (1) are achieved.
3. The piston type oil distributing valve assembly with the double spring structure as claimed in claim 1, wherein the piston type pressure reducing section (16) divides the valve bushing (2) into an oil inlet cavity (15) positioned at the front end of the piston type pressure reducing section (16) and a pressure reducing cavity (12) positioned at the rear end of the piston type pressure reducing section.
4. The piston-type oil distributing shutter assembly with double spring structure according to claim 1, characterized in that the diameter of the piston-type decompression section (16) is larger than the diameter of the piston rod (21).
5. The piston type oil distributing valve assembly with double spring structure according to claim 1, wherein one end of the small spring (8) is fixed on the small spring seat (4), and the other end is supported in the inner cavity of the large spring seat (9).
6. The piston-type oil distribution valve assembly with double spring structure according to claim 1, characterized in that the stiffness coefficient of the large spring (10) is larger than that of the small spring (8).
7. The piston type oil distributing valve assembly with the double-spring structure according to claim 1, wherein an adjusting screw cover (7) is arranged on the rear end face of the screw sleeve (5), and the adjusting screw (6) penetrates through the adjusting screw cover (7) to be connected with the spring support (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111310809.0A CN114109611B (en) | 2021-11-05 | 2021-11-05 | Piston type oil distributing valve assembly with double-spring structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111310809.0A CN114109611B (en) | 2021-11-05 | 2021-11-05 | Piston type oil distributing valve assembly with double-spring structure |
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| CN114109611A CN114109611A (en) | 2022-03-01 |
| CN114109611B true CN114109611B (en) | 2023-05-23 |
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| CN114992669B (en) * | 2022-05-12 | 2023-09-05 | 中国航发四川燃气涡轮研究院 | Fuel nozzle with adjusting valve and fuel supply mode |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939516A (en) * | 2019-11-21 | 2020-03-31 | 中国航发西安动力控制科技有限公司 | Oil cutting device with protective valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB751361A (en) * | 1954-01-06 | 1956-06-27 | George Raymond Shepherd | Improvements in or relating to liquid fuel control systems particularly for gas turbine apparatus |
| CN201568065U (en) * | 2009-11-20 | 2010-09-01 | 郑州煤机液压电控有限公司 | Sequence valve for hydraulic support |
| CN205172675U (en) * | 2015-11-06 | 2016-04-20 | 西安航空动力控制科技有限公司 | Take distributing valve subassembly of cooling and lubrication oil circuit |
| CN207420658U (en) * | 2017-11-17 | 2018-05-29 | 四川航庆机械制造有限公司 | Engine oil pump Multi-stage pressure limiting valve |
| CN109522638B (en) * | 2018-12-14 | 2022-12-06 | 中国航发贵州红林航空动力控制科技有限公司 | Ring-dividing and pressure-dividing metering valve bushing type hole structure and design method |
| CN111852661B (en) * | 2020-05-22 | 2022-08-05 | 中国航发贵州红林航空动力控制科技有限公司 | High-pressure large-flow valve assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110939516A (en) * | 2019-11-21 | 2020-03-31 | 中国航发西安动力控制科技有限公司 | Oil cutting device with protective valve |
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