CN111022191B - Piston device with speed response mechanism - Google Patents
Piston device with speed response mechanism Download PDFInfo
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- CN111022191B CN111022191B CN201911159638.9A CN201911159638A CN111022191B CN 111022191 B CN111022191 B CN 111022191B CN 201911159638 A CN201911159638 A CN 201911159638A CN 111022191 B CN111022191 B CN 111022191B
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- Prior art keywords
- piston
- oil path
- shell
- outlet
- working oil
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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
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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
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
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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
- F02C9/00—Controlling gas-turbine plants; Controlling fuel supply in air- breathing jet-propulsion plants
- F02C9/26—Control of fuel supply
- F02C9/32—Control of fuel supply characterised by throttling of fuel
Abstract
The invention belongs to the field of fuel systems of aircraft engines, and relates to a piston device with a speed response mechanism, which comprises a shell and a piston arranged in the shell, wherein the shell is provided with a working oil path inlet and a working oil path outlet, and the piston is provided with an annular working oil path channel; the piston comprises a piston head and a flow-adjustable piston seat fixedly connected with the piston head; the shell is provided with an adjusting oil path inlet and an adjusting oil path outlet; the inlet of the adjusting oil way is communicated with the outlet of the adjusting oil way through the flow-adjustable piston seat; when the outlet of the adjusting oil path is closed, the piston head moves in the shell along the axial direction of the shell, and the inlet of the working oil path is communicated with the outlet of the working oil path through the annular working oil path channel; when the outlet of the adjusting oil path is opened, the piston head moves in the shell along the axial direction of the shell, and the inlet of the working oil path is disconnected with the outlet of the working oil path. The invention can ensure the oil supply rate during the ignition of the product and the normal work after ignition.
Description
Technical Field
The invention belongs to the field of fuel systems of aircraft engines, relates to a piston device with a speed response mechanism, and particularly relates to a piston device with a speed response mechanism, which is used for controlling and connecting a combustion chamber in a fuel system of an aircraft engine.
Background
When the valve (the structural schematic diagram of the adopted piston is shown in fig. 1) in the prior art normally works, the movement of the piston (the structural schematic diagram is shown in fig. 1) is controlled through the fuel pressure difference of the left cavity and the right cavity so as to control the oil circuit to be opened and closed, and the piston is quickly stopped against the matching surface of matched components, so that the opening degree of the valve is suddenly changed, the oil supply is suddenly changed, the ignition of an engine is not facilitated, and the phenomenon of rich oil flameout is caused.
Disclosure of Invention
In order to solve the above technical problems in the background art, the present invention provides a piston device with a speed response mechanism, which ensures the oil supply rate during the ignition of the product and the normal operation after the ignition.
In order to achieve the purpose, the invention adopts the following technical scheme:
a piston device with a speed response mechanism comprises a shell and a piston which is arranged in the shell and can move along the axial direction of the shell, wherein a working oil path inlet and a working oil path outlet are formed in the shell, and an annular working oil path channel is formed in the piston; the method is characterized in that: the piston comprises a piston head and a flow-adjustable piston seat fixedly connected with the piston head; the shell is provided with an adjusting oil path inlet and an adjusting oil path outlet; the inlet of the adjusting oil way is communicated with the outlet of the adjusting oil way through the flow adjustable piston seat; when the outlet of the adjusting oil path is closed, the piston head and the flow-adjustable piston seat synchronously move in the shell along the axial direction of the shell, and when the preset position of the shell is reached, the inlet of the working oil path is communicated with the outlet of the working oil path through the annular working oil path channel; when the outlet of the adjusting oil path is opened, the piston head and the flow-adjustable piston seat synchronously move in the shell along the axial direction of the shell, and when the piston head and the flow-adjustable piston seat leave the set position of the shell, the inlet of the working oil path is disconnected with the outlet of the working oil path.
The end part of the piston head is provided with a cavity; the flow-adjustable piston seat extends into the cavity at the end part of the piston head and is fixedly connected with the piston head; an oil guide channel is arranged on the piston head along the radial direction of the piston head; a second oil guide channel is arranged on the flow adjustable piston seat along the axial direction of the flow adjustable piston seat; and the inlet of the adjusting oil path is communicated with the outlet of the adjusting oil path sequentially through the oil guide channel, the cavity at the end part of the piston head and the second oil guide channel.
The flow-adjustable piston seat comprises a piston seat body, a throttling nozzle and a threaded plug with a hole; the piston seat body is of a cylindrical structure with a U-shaped section and an opening at the bottom; the throttling nozzle is provided with an axial through hole along the axial direction of the throttling nozzle; the screw plug with the hole is of a hollow columnar structure; the throttling nozzle is arranged in the piston seat body; the screw plug with the hole is arranged on the piston seat body and extrudes the end part of the throttling nozzle; the opening of the piston seat body, the axial through hole of the throttling nozzle and the opening hole in the threaded plug with the hole form a second oil guide channel integrally.
The inner surface of the axial through hole on the throttling nozzle is step-shaped.
And a sealing ring is arranged between the throttling nozzle and the piston seat body.
The invention has the advantages that:
the invention provides a piston device with a speed response mechanism, which comprises a shell and a piston, wherein the piston is arranged in the shell and can move along the axial direction of the shell; the method is characterized in that: the piston comprises a piston head and a flow-adjustable piston seat fixedly connected with the piston head; the shell is provided with an adjusting oil path inlet and an adjusting oil path outlet; the inlet of the adjusting oil way is communicated with the outlet of the adjusting oil way through the flow-adjustable piston seat; when the outlet of the adjusting oil path is closed, the piston head and the flow-adjustable piston seat synchronously move in the shell along the axial direction of the shell, and when the preset position of the shell is reached, the inlet of the working oil path is communicated with the outlet of the working oil path through the annular working oil path channel; when the outlet of the adjusting oil path is opened, the piston head and the flow-adjustable piston seat synchronously move in the shell along the axial direction of the shell, and when the piston head and the flow-adjustable piston seat leave the set position of the shell, the inlet of the working oil path is disconnected with the outlet of the working oil path. In order to realize rapid reverse oil return cut-off, the piston is opened to supply oil in a forward direction at a certain speed, so that the oil supply rate during product ignition is ensured, and the product can normally work after ignition. The invention improves the structure of the piston, when the piston moves to a set position, one end of the piston forms a closed oil cavity, and the oil supply rate to the closed oil cavity is controlled by adjusting the size of the throttling nozzle, thereby realizing the moving speed of the piston and further realizing the control of the oil supply rate of the piston. The piston device with the speed response mechanism provided by the invention obviously improves the ignition success rate, and the piston with the structure can well meet the service life requirement of accessories after trial run for more than 1500 hours on an engine along with a certain type of oil pump regulator.
Drawings
FIG. 1 is a schematic diagram of a prior art piston;
FIG. 2 is a schematic view of a piston used in the present invention;
FIG. 3 is a schematic structural view of a piston assembly provided by the present invention;
FIG. 4 is a schematic diagram of the initial state of P2 oil path when the piston is forced to move to the left when the oil path is closed;
FIG. 5 is a schematic diagram of the P2 oil path in the initial state when the piston is forced to move to the right when the oil path is connected;
wherein:
1-a piston head; 2-a throttle nozzle; 3-a plug screw with a hole; 4-a shell; 5-a shell plug; p1-inlet of regulating oil path; p2-adjusting oil outlet; p3-working oil path inlet; p4-working oil path outlet; p5-low pressure return oil.
Detailed Description
Referring to fig. 3, the present invention provides a piston device with a speed response mechanism, which comprises a housing 4 and a piston disposed inside the housing 4 and capable of moving along the axial direction of the housing 4, wherein the housing 4 is provided with a working oil path inlet P3 and a working oil path outlet P4, and the piston is provided with an annular working oil path channel; the piston comprises a piston head 1 and a flow-adjustable piston seat fixedly connected with the piston head 1; the shell 4 is provided with an adjusting oil path inlet P1 and an adjusting oil path outlet P2; the adjusting oil path inlet P1 is communicated with the adjusting oil path outlet P2 through a flow adjustable piston seat; when the adjusting oil path outlet P2 is closed, the piston head 1 and the flow-rate adjustable piston seat synchronously move in the shell 4 along the axial direction of the shell 4, and when the preset position of the shell 4 is reached, the working oil path inlet P3 is communicated with the working oil path outlet P4 through an annular working oil path; when the adjusting oil passage outlet P2 is opened, the piston head 1 and the flow rate adjusting piston seat move in the housing 4 in the axial direction of the housing 4 in synchronization, and when they leave a predetermined position of the housing 4, the working oil passage inlet P3 is disconnected from the working oil passage outlet P4.
The inlet P1 and inlet P3 of the regulating oil passage are normally open oil passages, the outlet P2 of the regulating oil passage is in a closed state and in a closed state, the outlet P4 of the working oil passage is the outlet P3 of the inlet P5 of the working oil passage, and the outlet P5 of the working oil passage is low-pressure return oil.
The end part of the piston head 1 is provided with a cavity; the flow adjustable piston seat extends into a cavity at the end part of the piston head 1 and is fixedly connected with the piston head 1; an oil guide channel is arranged on the piston head 1 along the radial direction of the piston head 1; a second oil guide channel is arranged on the flow adjustable piston seat along the axial direction of the flow adjustable piston seat; the adjusting oil path inlet P1 is communicated with the adjusting oil path outlet P2 through an oil guide channel, a cavity at the end part of the piston head 1 and a second oil guide channel in sequence.
Referring to fig. 2, the flow adjustable piston seat adopted by the invention comprises a piston seat body, a throttling nozzle 2 and a screw plug 3 with a hole; the piston seat body is a cylindrical structure with a U-shaped section and an opening at the bottom; the throttle nozzle 2 is provided with an axial through hole along the axial direction of the throttle nozzle 2; the screw plug 3 with the hole is a hollow columnar structure; the throttle nozzle 2 is arranged in the piston seat body; the screw plug 3 with the hole is arranged on the piston seat body and extrudes the end part of the throttle nozzle 2; the opening of the piston seat body, the axial through hole of the throttle nipple 2 and the opening hole of the threaded plug 3 with the hole form a second oil guide channel integrally. The inner surface of the axial through hole on the throttle nozzle 2 is step-shaped. A sealing ring is arranged between the throttle nozzle 2 and the piston seat body. The piston is of a cylindrical structure, the left half part is a piston head 1, the right half part is a flow-adjustable piston seat, the left end and the right end of the piston head 1 are cylindrical cakes, and the right end of the piston head 1 is a cavity and is provided with a radial oil guide channel; the flow adjustable piston seat is integrally of a cylindrical structure, the middle of the flow adjustable piston seat is of a cylindrical cake structure, and the whole center of the flow adjustable piston seat is of a through structure; the screw plug 3 with the hole is a structure with a through center; the throttle nozzle 2 is of a cylindrical structure, the left end and the right end of the throttle nozzle are provided with column cakes, and the center of the throttle nozzle is of a stepped small hole structure; the flow adjustable piston seat is provided with a throttle nozzle 2 with a rubber ring at the center and is tightly pressed in the piston seat body by a screw plug 3 with a hole.
Referring to fig. 4, an inlet P1 of the adjusting oil path is communicated with a first oil chamber of the shell and the stroke of the piston through an inlet on the shell, then enters a second oil chamber in the piston through a radial oil hole on the piston, and then enters a third oil chamber formed by the piston and the right side of the shell through a small hole of the throttle nozzle 2; when the adjusting oil path outlet P2 is closed, the first oil chamber, the second oil chamber and the third oil chamber form closed chambers, the oil pressure is equal, the piston is subjected to the rightward pressure of the first oil chamber, the leftward pressure of the third oil chamber and the oil return outlet pressure (which can be ignored) on the right side of the piston head, and as the acting area of the first oil chamber is smaller than that of the third oil chamber, the piston moves to the left under the action of resultant force, and the oil path from the working oil path inlet P3 to the working oil path outlet P4 is communicated.
Referring to fig. 5, when the adjusting oil passage outlet P2 is on, the pressure in the third oil chamber is 0, and the piston moves to the right under the first oil chamber pressure, cutting off the oil passage from the working oil passage inlet P3 to the working oil passage outlet P4.
In order to realize rapid reverse oil return cut-off, the piston is opened at a certain speed in the forward direction to supply oil, so that the oil supply rate of a product during ignition is ensured, and the product can normally work after ignition. The invention improves the structure of the piston, when the piston moves to a set position, one end of the piston forms a closed oil cavity, and the oil supply rate to the closed oil cavity is controlled by adjusting the size of the throttling nozzle, thereby realizing the moving speed of the piston and further realizing the control of the oil supply rate of the piston. The piston device with the speed response mechanism controls the speed of liquid flowing into the third oil cavity by changing the size of the throttling nozzle, controls the left moving speed of the valve, and correspondingly controls the speed of the change of the opening of the oil way, thereby realizing the adjustment of the fuel supply speed. The piston device with the speed response mechanism provided by the invention obviously improves the ignition success rate, and the piston with the structure can well meet the service life requirement of accessories after trial run for more than 1500 hours on an engine along with a certain type of oil pump regulator.
Claims (4)
1. A piston device with a speed response mechanism comprises a shell (4) and a piston which is arranged in the shell (4) and can move along the axial direction of the shell (4), wherein a working oil path inlet (P3) and a working oil path outlet (P4) are arranged on the shell (4), and an annular working oil path channel is arranged on the piston; the method is characterized in that: the piston comprises a piston head (1) and a flow-adjustable piston seat fixedly connected with the piston head (1); the shell (4) is provided with an adjusting oil path inlet (P1) and an adjusting oil path outlet (P2); the adjusting oil path inlet (P1) is communicated with the adjusting oil path outlet (P2) through a flow-adjustable piston seat; when the adjusting oil path outlet (P2) is closed, the piston head (1) and the flow-rate adjustable piston seat synchronously move in the shell (4) along the axial direction of the shell (4), and when the preset position of the shell (4) is reached, the working oil path inlet (P3) is communicated with the working oil path outlet (P4) through an annular working oil path channel; when the adjusting oil path outlet (P2) is opened, the piston head (1) and the flow-rate adjustable piston seat synchronously move in the shell (4) along the axial direction of the shell (4), and when the piston head leaves a set position of the shell (4), the working oil path inlet (P3) is disconnected with the working oil path outlet (P4); the flow-adjustable piston seat comprises a piston seat body, a throttling nozzle (2) and a threaded plug (3) with a hole; the piston seat body is of a cylindrical structure with a U-shaped section and an opening at the bottom; the throttle nozzle (2) is provided with an axial through hole along the axial direction of the throttle nozzle (2); the perforated plug screw (3) is of a hollow columnar structure; the throttling nozzle (2) is arranged in the piston seat body; the screw plug (3) with the hole is arranged on the piston seat body and extrudes the end part of the throttle nozzle (2); the opening of the piston seat body, the axial through hole of the throttling nozzle (2) and the opening hole on the threaded plug (3) with the hole form a second oil guide channel integrally; the second oil guide channel is arranged along the axial direction of the flow adjustable piston seat.
2. The piston device with a speed responsive mechanism of claim 1, wherein: the end part of the piston head (1) is provided with a cavity; the flow-adjustable piston seat extends into a cavity at the end part of the piston head (1) and is fixedly connected with the piston head (1); an oil guide channel is arranged on the piston head (1) along the radial direction of the piston head (1); and the inlet (P1) of the adjusting oil way is communicated with the outlet (P2) of the adjusting oil way sequentially through the oil guide channel, the cavity at the end part of the piston head (1) and the second oil guide channel.
3. The piston device with a speed responsive mechanism of claim 2, wherein: the inner surface of the axial through hole on the throttling nozzle (2) is step-shaped.
4. A piston device with a speed responsive mechanism according to claim 3, wherein: and a sealing ring is arranged between the throttling nozzle (2) and the piston seat body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159638.9A CN111022191B (en) | 2019-11-22 | 2019-11-22 | Piston device with speed response mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911159638.9A CN111022191B (en) | 2019-11-22 | 2019-11-22 | Piston device with speed response mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111022191A CN111022191A (en) | 2020-04-17 |
| CN111022191B true CN111022191B (en) | 2022-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911159638.9A Active CN111022191B (en) | 2019-11-22 | 2019-11-22 | Piston device with speed response mechanism |
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| CN (1) | CN111022191B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114345677B (en) * | 2021-10-29 | 2023-03-24 | 中国航发西安动力控制科技有限公司 | Valve sleeve type pneumatic vibrator |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH470617A (en) * | 1967-01-14 | 1969-03-31 | Alfred Waletzko App Bau | Pipe end valve |
| US5529387A (en) * | 1994-09-06 | 1996-06-25 | Valcor Engineering Corporation | Solenoid operated discharging orifice shutoff valve |
| CN101241371B (en) * | 2007-12-28 | 2010-10-13 | 中国航天科技集团公司第六研究院第十一研究所 | Steady flow -type discharge regulator |
| CN102980622B (en) * | 2012-11-06 | 2015-06-17 | 中国航空工业集团公司沈阳发动机设计研究所 | Design and adjusting method for fuel oil metering device starting flow characteristics |
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| CN111022191A (en) | 2020-04-17 |
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