CN112550673A - Propeller speed regulator beta valve assembly - Google Patents
Propeller speed regulator beta valve assembly Download PDFInfo
- Publication number
- CN112550673A CN112550673A CN202011316011.2A CN202011316011A CN112550673A CN 112550673 A CN112550673 A CN 112550673A CN 202011316011 A CN202011316011 A CN 202011316011A CN 112550673 A CN112550673 A CN 112550673A
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- China
- Prior art keywords
- valve
- small
- bushing
- distance
- shaped fork
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- 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.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/38—Blade pitch-changing mechanisms fluid, e.g. hydraulic
- B64C11/385—Blade pitch-changing mechanisms fluid, e.g. hydraulic comprising feathering, braking or stopping systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C11/00—Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
- B64C11/30—Blade pitch-changing mechanisms
- B64C11/306—Blade pitch-changing mechanisms specially adapted for contrarotating propellers
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a shell tower valve assembly of a propeller speed regulator, wherein one end of a valve is provided with a small-distance end plug, and the other end of the valve is fixed with a U-shaped fork; the bushing is fixed in an inner hole of a round mounting hole extending out of the speed regulator shell in an interference press-fitting mode; one end of the valve with a small-distance end plug is assembled in the lining in a micro-gap manner; the reset spring which is sleeved on the valve and fixed in the U-shaped fork groove is pressed on the adjusting washer; the cap is sleeved on the outer circle of the U-shaped fork, the adjusting washer and the circular mounting opening and is fixed on the circular mounting opening; the valve is provided with an oil groove, the bushing is provided with a high-pressure oil outlet and a high-pressure oil inlet which are communicated with the oil groove, and the inner cavity of the bushing at the tail end of the small-distance end plug is an oil return cavity; under the normal operating condition, the high-pressure oil outlet is communicated with the oil groove, and when the small distance is limited, the small distance end plug just seals the high-pressure oil outlet. The propeller speed regulator has the functions of small-distance limiting and distance protecting, beta control and reverse propeller function, so that the structure of the propeller becomes simple, the volume becomes small and the weight becomes light.
Description
Technical Field
The invention relates to a beta valve assembly of a propeller speed regulator.
Background
The existing propeller speed regulator does not have a small-distance limiting mechanism, the propeller is protected at a fixed distance by adopting an end surface tooth meshing mechanism, the end surface tooth meshing mechanism is complex in structure, the size and the weight of the propeller are increased, the use requirements of aircrafts such as airplanes and the like cannot be met, and the research on the propeller speed regulator with the small-distance limiting and fixed-distance protection function is urgently needed. The existing speed regulator has no beta manipulation and reverse propeller function, the airplane can land and slide by reducing the blade angle of the propeller in a certain range to achieve a certain damping effect, but the effect is very little, the airplane has long landing and sliding distance, a long runway needs to be arranged, land resources are wasted, and the utilization rate of the existing land resources is low. Therefore, a speed regulator which has a simple oil path, can control feathering and can realize beta operation and reverse feathering functions is urgently needed to be researched.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide the beta valve assembly of the propeller speed regulator, the propeller speed regulator provided with the beta valve assembly has the functions of small-distance movement limiting and distance protection, beta control and reverse propeller function, so that the structure of the propeller becomes simple, the volume becomes small, the weight becomes light, the flight safety is good, and the runway is shortened.
In order to achieve the purpose, the technical solution of the invention is as follows: a shell tower valve assembly of a propeller speed regulator comprises a lining, a valve, a return spring, a U-shaped fork with a step and a central hole and a cap; one end of the valve is provided with a small-distance end plug, and the other end of the valve is fixed with a U-shaped fork; the bushing is pressed in a round mounting hole extending out of the speed regulator shell in an interference fit mode, an adjusting washer with the same diameter as the round mounting hole extending out of the speed regulator shell is pressed in the port through a cap, and the relative position of the small-distance end plug of the valve and the high-pressure oil outlet of the bushing is adjusted through the adjusting washer; one end of the valve with a small-distance end plug is assembled in the bushing in a micro-gap manner, and the position between the valve and the bushing is sealed by a sealing ring at the end part of the bushing; the reset spring which is sleeved on the valve and fixed in the U-shaped fork groove is pressed on the adjusting washer; the cap is provided with a reducing inner hole with the diameter matched with the excircle of the U-shaped fork, the excircle of the step of the U-shaped fork, the adjusting washer and the excircle of the circular mounting opening, the reducing inner hole is sleeved on the excircle of the U-shaped fork, the adjusting washer and the excircle of the circular mounting opening and is fixed on the circular mounting opening, and the length of the inner hole part matched with the excircle of the step of the U-shaped fork is the maximum range of the movement of the valve; the valve is provided with an oil groove, the bushing is provided with a high-pressure oil outlet and a high-pressure oil inlet which are communicated with the oil groove, and the inner cavity of the bushing at the tail end of the small-distance end plug is an oil return cavity; under the normal operating condition, the high-pressure oil outlet is communicated with the oil groove, when the valve is limited at a small distance, the valve moves to the outer end of the circular mounting port in place, and the small-distance end plug just seals the high-pressure oil outlet.
Further preferably, a plastic gasket embedded on the inner wall of the port of the cap is arranged between the cap and the U-shaped fork for sealing and dust prevention.
Further preferably, another sealing ring is pressed between the bushing, the circular mounting opening and the adjusting washer.
When the speed regulator is used, the oil return cavity is directly communicated with an oil return hole in the speed regulator shell, the high-pressure oil outlet and the high-pressure oil inlet are respectively connected with a high-pressure oil inlet of the speed regulator speed selection mechanism and a high-pressure oil outlet of the gear pump through a high-pressure oil hole in the shell, the outer end of the U-shaped fork is connected with the reverse paddle lever, and the reverse paddle lever is connected with the power rod and the propeller.
When the engine slows down, high-pressure oil pumped by the speed regulator enters a propeller cavity, the propeller moves from feathering to a small distance direction, when the blade angle of the propeller is reduced to an alpha angle, the propeller continues to be in a small distance, the beta valve moves under the elastic force action of the reverse paddle lever and the return spring, and the small distance end on the beta valve closes the high-pressure oil outlet, so that the blade angle of the propeller is automatically kept at a certain blade angle, the propeller is spaced, and the protection function is achieved. β -steering and counter-paddles: when the propeller is operated in a reverse propeller mode, the propeller moves towards the reverse propeller direction, the reverse propeller lever drives the beta valve to move forwards, the high-pressure oil outlet is closed by the small-distance end plug, oil is not supplied to the propeller cavity any more, therefore, a certain propeller blade angle is automatically kept, the reverse propeller operation of the rear pull power rod is continued, the beta valve moves backwards again, the small-distance end plug leaves the high-pressure oil outlet, oil is supplied to the propeller cavity, the high-pressure oil enters the propeller cavity again, the high-pressure oil moves towards the reverse propeller direction, the reverse propeller lever drives the beta valve to move forwards, the oil circuit is closed again, and the process is repeated until full reverse propeller operation is achieved.
The propeller speed regulator provided with the beta valve assembly has the functions of small-distance limiting and distance-fixing protection and beta control and reverse propeller function, so that the propeller structure becomes simple, the size becomes small, the weight becomes light, the flight safety is good, and the runway is shortened.
Drawings
FIG. 1 is a schematic view of the mounting structure of the present invention;
fig. 2 is a schematic structural view of the shutter according to the present invention.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
As shown in fig. 1 and 2, the present embodiment includes a bush 5, a shutter 8, a return spring 10, a clevis 9 with a step and a central hole, and a cap 13. One end of the valve 8 is provided with a small-distance end plug 15, and the other end is fixed with a U-shaped fork 9. The bushing 5 is press-fitted in a round mounting hole 14 extending out of the speed regulator shell in an interference manner, and an adjusting washer 12 with the same diameter as the round mounting hole 14 extending out of the speed regulator shell is press-fitted at the end of the bushing by a cap 13; the relative position of the valve small-distance end plug 15 and the bushing high-pressure oil outlet 2 is adjusted through adjusting the gasket 12. The valve 8 is assembled in the bushing 5 with a small gap at one end with a small distance end plug 15, and the valve 8 and the bushing 5 are sealed by a sealing ring 6 at the end position of the bushing 5. Another sealing ring 7 is pressed between the bushing, the circular mounting opening 14 and the adjusting gasket 12. The return spring 10, which is fitted over the flap 8 and fixed in the groove of the clevis 9, is pressed against the adjusting washer 12. The cap 13 is provided with a reducing inner hole with the diameter matched with the excircle of the U-shaped fork 9, the excircle 16 of the step of the U-shaped fork, the adjusting washer 12 and the excircle of the circular mounting hole 14, the reducing inner hole is sleeved on the excircle of the U-shaped fork 9, the adjusting washer 12 and the excircle of the circular mounting hole 14 and is fixed on the circular mounting hole 14 in a threaded manner, and the length of the inner hole part matched with the excircle 16 of the step of the U-shaped fork is the maximum range of the movement of the valve 8. Preferably, a plastic gasket 11 embedded on the inner wall of the port of the cap 13 is arranged between the cap 13 and the U-shaped fork 9 for sealing and preventing dust. The valve 8 is provided with an oil groove 3, the bushing 5 is provided with a high-pressure oil outlet 2 and a high-pressure oil inlet 4 which are communicated with the oil groove 3, and the inner cavity of the bushing 5 at the tail end of the small-distance end plug 15 is an oil return cavity 1. Under normal operating condition, the high-pressure oil outlet 2 is communicated with the oil groove 3, when the valve is limited at a small distance, the valve 8 moves to the outer end of the circular mounting opening 14 in place, and the small-distance end plug 15 just seals the high-pressure oil outlet 2. When the speed regulator is used, the oil return cavity 1 is directly communicated with an oil return hole 17 in a speed regulator shell, the high-pressure oil outlet 2 and the high-pressure oil inlet 4 are respectively connected with a high-pressure oil inlet of a speed regulator speed selection mechanism and a high-pressure oil outlet of a gear pump through a high-pressure oil hole in the shell, the outer end of the U-shaped fork is connected with a reverse paddle lever, and the reverse paddle lever is connected with the power rod and the propeller.
There are, of course, many other embodiments of the invention and modifications and variations of this invention that will be obvious to those skilled in the art may be made without departing from the spirit and scope of the invention, but it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention.
Claims (3)
1. A propeller governor beta valve subassembly which characterized in that: the device comprises a bush, a valve, a return spring, a U-shaped fork with a step and a central hole and a cap; one end of the valve is provided with a small-distance end plug, and the other end of the valve is fixed with a U-shaped fork; the bushing is pressed in a round mounting hole extending out of the speed regulator shell in an interference fit mode, and an adjusting washer with the same diameter as the round mounting hole extending out of the speed regulator shell is pressed at the port of the bushing through a cap; one end of the valve with a small-distance end plug is assembled in the bushing in a micro-gap manner, and the position between the valve and the bushing is sealed by a sealing ring at the end part of the bushing; the reset spring which is sleeved on the valve and fixed in the U-shaped fork groove is pressed on the adjusting washer; the cap is provided with a reducing inner hole with the diameter matched with the excircle of the U-shaped fork, the excircle of the step of the U-shaped fork, the adjusting washer and the excircle of the circular mounting opening, the reducing inner hole is sleeved on the excircle of the U-shaped fork, the adjusting washer and the excircle of the circular mounting opening and is fixed on the circular mounting opening, and the length of the inner hole part matched with the excircle of the step of the U-shaped fork is the maximum range of the movement of the valve; the valve is provided with an oil groove, the bushing is provided with a high-pressure oil outlet and a high-pressure oil inlet which are communicated with the oil groove, and the inner cavity of the bushing at the tail end of the small-distance end plug is an oil return cavity; under the normal operating condition, the high-pressure oil outlet is communicated with the oil groove, when the valve is limited at a small distance, the valve moves to the outer end of the circular mounting port in place, and the small-distance end plug just seals the high-pressure oil outlet.
2. The propeller governor beta valve assembly of claim 1, wherein: and a plastic gasket embedded on the inner wall of the port of the cap is arranged between the cap and the U-shaped fork.
3. The propeller governor beta valve assembly of claim 1 or 2, wherein: and another sealing ring is pressed and mounted among the bushing, the circular mounting opening and the adjusting gasket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316011.2A CN112550673A (en) | 2020-11-22 | 2020-11-22 | Propeller speed regulator beta valve assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011316011.2A CN112550673A (en) | 2020-11-22 | 2020-11-22 | Propeller speed regulator beta valve assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112550673A true CN112550673A (en) | 2021-03-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011316011.2A Pending CN112550673A (en) | 2020-11-22 | 2020-11-22 | Propeller speed regulator beta valve assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112550673A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783245A (en) * | 2023-01-31 | 2023-03-14 | 江苏新扬新材料股份有限公司 | Hydraulic fixed-distance stop device for airplane propeller |
-
2020
- 2020-11-22 CN CN202011316011.2A patent/CN112550673A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115783245A (en) * | 2023-01-31 | 2023-03-14 | 江苏新扬新材料股份有限公司 | Hydraulic fixed-distance stop device for airplane propeller |
| CN115783245B (en) * | 2023-01-31 | 2023-04-11 | 江苏新扬新材料股份有限公司 | Hydraulic fixed-distance stop device for airplane propeller |
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