Anti-backflow fuel nozzle for aviation fuel
By designing anti-reflow devices and injection devices in the aviation fuel nozzles, the problems of fuel return and nozzle blockage are solved, and efficient fuel injection and safety and stability of nozzles are achieved.
Patent Information
- Application Number
- CN202421053420.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-15
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-05-15
AI Technical Summary
Existing aviation fuel nozzles are prone to fuel return after fuel is stopped, resulting in fuel contamination and nozzle blockage.
An aviation fuel nozzle including a return-proof device and an injection device is designed. The anti-return device blocks the nozzle when the fuel stops spraying to prevent the fuel from flowing back through the cooperation of the rebound spring and blocking block. The injection device then filters solid impurities in the fuel oil through the filter assembly and the injection assembly and ensures that the fuel oil is sprayed smoothly.
Effectively prevent fuel return from contaminating clean fuel, reduce safety hazards of nozzles, and avoid internal clogging of nozzles, ensuring fuel injection effect.
Smart Images
Figure CN222616949U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of aviation fuel, in particular to a fuel nozzle capable of preventing backflow for aviation fuel. Background Art
[0002] The fuel nozzle belongs to the field of engine technology. It is a device composed of a cavity, an oil valve and a nozzle cap. When the fuel pressure in the oil cavity is higher than the set value, the oil valve opens and the fuel is sprayed out through the nozzle cap. The fuel nozzle can accelerate the formation of the mixture, ensure stable combustion and improve combustion efficiency. The fuel nozzles used in aircraft engines include centrifugal nozzles, pneumatic nozzles, evaporative nozzles and oil-slinging disc nozzles.
[0003] In the prior art, after the fuel stops spraying from the nozzle, some of the fuel may flow back along the nozzle. The returned fuel is likely to contaminate the clean fuel and reduce the fuel quality. In addition, since the flow cavity inside the nozzle is small, when there are impurities in the fuel, it is easy to cause the nozzle to be blocked. In order to solve the above problems, we propose a fuel nozzle with anti-backflow for aviation fuel. Utility Model Content
[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: a fuel nozzle with anti-backflow for aviation fuel, comprising a fixing seat; a shell, the outer side of the shell is fixedly connected to the inner side of the fixing seat; an anti-backflow device, the outer side of the anti-backflow device is slidably connected to the inner side of the shell, and the anti-backflow device is used to prevent fuel backflow; a spray device, the outer side of the spray device is fixedly connected to the bottom of the inner cavity of the shell, and the spray device is used to spray fuel; a feed hole is opened in the wall of the shell, and the feed hole is used to feed fuel into the inner side of the shell. By setting the anti-backflow device, when stopping the spraying of fuel, the nozzle is blocked to prevent the fuel entering the nozzle from flowing back, and the fuel backflow is prevented from contaminating the clean fuel, thereby reducing the safety hazards of the nozzle. By setting the spray device to spray the fuel, the spray device can filter the fuel, reduce the solid impurities in the fuel, avoid the problem of the nozzle being blocked and unable to be used, prevent the fuel from accumulating inside the nozzle, and ensure the spraying effect.
[0005] Preferably, the anti-backflow device includes a baffle, a blocking block is slidably connected to the inner side of the baffle, a rebound spring is fixedly connected to the top of the blocking block, a threaded column is fixedly connected to the top of the rebound spring, a sliding column is fixedly connected to the center of the bottom of the threaded column, the outer side of the baffle is fixedly connected to the inner side of the shell, the outer side of the threaded column is threadedly connected to the top of the inner side of the shell, and the outer side of the sliding column is slidably connected to the inner side of the blocking block. Through the cooperation of the blocking block and the baffle, during fuel injection, the fuel can flow downward along the space between the blocking block and the baffle, and when the fuel refluxes, the refluxed fuel and the rebound spring make the blocking block close to the surface of the baffle, blocking the baffle to prevent the fuel from flowing back.
[0006] Preferably, the spray device includes a fixed shell, the outer side of the fixed shell is fixedly connected to the bottom of the inner cavity of the shell, the inner side of the fixed shell is fixedly connected to a filter assembly, and the bottom of the fixed shell is slidably connected to a spray assembly. By setting the spray device, the filter assembly filters the fuel to avoid nozzle clogging, and the spray assembly sprays the fuel.
[0007] Preferably, the filter assembly includes a guide plate, the bottom of the guide plate is fixedly connected to the top of the fixed shell, the outer side of the guide plate is fixedly connected to the inner side of the outer shell, the bottom of the guide plate is fixedly connected to a collecting frame, the outer side of the collecting frame is fixedly connected to the inner side of the fixed shell, and the bottom of the inner cavity of the collecting frame is fixedly connected to a sieve plate. The filter assembly is provided to filter the fuel, reduce solid impurities in the fuel, avoid nozzle clogging, and the collection frame collects impurities in the airflow, reducing the probability of clogging of the sieve plate and avoiding a decrease in the filtering performance of the sieve plate.
[0008] Preferably, the spray assembly includes a sliding frame, the outer side of the sliding frame is slidably connected to the inner side of the fixed shell, the bottom of the sliding frame is fixedly connected to a compression spring, the bottom end of the compression spring is fixedly connected to the bottom of the inner cavity of the fixed shell, and a discharge hole is opened in the wall of the sliding frame. The fuel is sprayed out by setting the spray assembly. After the fuel spraying is stopped, the discharge hole shrinks into the fixed shell to prevent the fuel from flowing out and reduce the probability of fuel leakage.
[0009] The beneficial effects of the utility model are as follows:
[0010] 1. The utility model is provided with a backflow prevention device. When spraying fuel, the nozzle is released to spray the fuel to the outside. When the fuel spraying stops, the nozzle is blocked to prevent the fuel entering the nozzle from flowing back, thereby preventing the fuel from flowing back and contaminating the clean fuel, thereby reducing the safety hazards of the nozzle.
[0011] 2. The utility model sprays the fuel by arranging a spray device, which can filter the fuel, reduce the solid impurities in the fuel, avoid the problem of the nozzle being blocked and causing the nozzle to be unusable, prevent the fuel from accumulating inside the nozzle, and ensure the spraying effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is the front view of the utility model;
[0013] Figure 2 It is a cross-sectional view of the utility model;
[0014] Figure 3 It is a structural schematic diagram of the utility model backflow prevention device;
[0015] Figure 4 It is a structural sectional view of the spraying device of the utility model;
[0016] Figure 5 It is a structural cross-sectional view of the filter assembly of the utility model;
[0017] Figure 6 It is a structural schematic diagram of the spray assembly of the utility model.
[0018] In the figure: 1. fixed seat; 2. outer shell; 3. anti-backflow device; 31. baffle; 32. blocking block; 33. rebound spring; 34. threaded column; 35. sliding column; 4. spray device; 41. fixed shell; 42. filter assembly; 421. guide plate; 422. collecting frame; 423. sieve plate; 43. spray assembly; 431. sliding frame; 432. compression spring; 433. discharge hole; 5. feed hole. DETAILED DESCRIPTION
[0019] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.
[0020] Example:
[0021] See also Figure 1-Figure 6The utility model provides a technical solution: a fuel nozzle with anti-backflow for aviation fuel, comprising a fixing seat 1; a shell 2, the outer side of the shell 2 is fixedly connected to the inner side of the fixing seat 1; an anti-backflow device 3, the outer side of the anti-backflow device 3 is slidably connected to the inner side of the shell 2, and the anti-backflow device 3 is used to prevent fuel from flowing back; a spraying device 4, the outer side of the spraying device 4 is fixedly connected to the bottom of the inner cavity of the shell 2, and the spraying device 4 is used to spray fuel; a feed hole 5 is opened in the wall of the shell 2, and the feed hole 5 is used to feed fuel into the inner side of the shell 2. When in use, the shell 2 is fixed by the fixing seat 1, and the fuel is fed into the shell 2 through the feed hole 5. The fuel flows along the shell 2 to the anti-backflow device 3, and the fuel flows downward through the anti-backflow device 3 to the ejection device 4, and is ejected from the ejection device 4. By setting the anti-backflow device 3, when spraying the fuel, the nozzle is released to spray the fuel to the outside, and when the fuel spraying stops, the nozzle is blocked to prevent the fuel entering the nozzle from flowing back, and to prevent the fuel from flowing back and contaminating the clean fuel, thereby reducing the safety hazard of the nozzle. By setting the ejection device 4 to eject the fuel, the ejection device 4 can filter the fuel, reduce the solid impurities in the fuel, avoid the problem of the nozzle being blocked and unable to be used, and prevent the fuel from accumulating inside the nozzle, thereby ensuring the ejection effect.
[0022] The backflow prevention device 3 includes a baffle 31, a blocking block 32 is slidably connected to the inner side of the baffle 31, a rebound spring 33 is fixedly connected to the top of the blocking block 32, a threaded column 34 is fixedly connected to the top of the rebound spring 33, a sliding column 35 is fixedly connected to the center of the bottom of the threaded column 34, the outer side of the baffle 31 is fixedly connected to the inner side of the shell 2, the outer side of the threaded column 34 is threadedly connected to the top of the inner side of the shell 2, and the outer side of the sliding column 35 is slidably connected to the inner side of the blocking block 32. Before use, the threaded column 34 can be rotated, and the threaded column 34 drives the sliding column 35 to move upward, and the threaded column 34 stretches the rebound spring 33, and the tensile force of the rebound spring 33 on the blocking block 32 is adjusted, so that the blocking block 32 is tightly attached to the surface of the baffle 31. The fuel flows along the housing 2 to the anti-backflow device 3, and the downward flow of the fuel drives the blocking block 32 to flow downward. The blocking block 32 drives the rebound spring 33 to stretch, and the fuel flows downward along the gap between the blocking block 32 and the baffle 31. After the fuel spraying stops, the rebound spring 33 drives the blocking block 32 to move upward under the action of its own elastic force, so that the blocking block 32 is tightly attached to the surface of the baffle 31, and the refluxed fuel is blocked by the blocking block 32 and cannot flow back. Through the cooperation of the blocking block 32 and the baffle 31, when the fuel is sprayed, the fuel can flow downward along the gap between the blocking block 32 and the baffle 31. When the fuel flows back, the refluxed fuel and the rebound spring 33 make the blocking block 32 tightly attached to the surface of the baffle 31, blocking the baffle 31 to prevent the fuel from flowing back.
[0023] The spray device 4 includes a fixed shell 41, the outer side of the fixed shell 41 is fixedly connected to the bottom of the inner cavity of the outer shell 2, the inner side of the fixed shell 41 is fixedly connected to a filter assembly 42, and the bottom of the fixed shell 41 is slidably connected to a spray assembly 43. When in use, the fuel flows downward along the gap between the block 32 and the baffle 31 to the spray device 4, and the fuel flows along the fixed shell 41 to the inside of the filter assembly 42. After being filtered by the filter assembly 42, the fuel flows downward to the spray assembly 43, and then flows to the outside along the spray assembly 43. By setting the spray device 4, the filter assembly 42 filters the fuel to avoid nozzle clogging, and the spray assembly 43 sprays the fuel.
[0024] The filter assembly 42 includes a guide plate 421, the bottom of the guide plate 421 is fixedly connected to the top of the fixed shell 41, the outer side of the guide plate 421 is fixedly connected to the inner side of the outer shell 2, the bottom of the guide plate 421 is fixedly connected to a collecting frame 422, the outer side of the collecting frame 422 is fixedly connected to the inner side of the fixed shell 41, and the bottom of the inner cavity of the collecting frame 422 is fixedly connected to a sieve plate 423. When in use, the fuel flows downward along the gap between the blocking block 32 and the baffle plate 31 to the ejection device 4, and the fuel flows along the guide plate 421 to the inside of the collecting frame 422. The sieve plate 423 in the filter assembly 42 filters the fuel, and the impurities filtered by the sieve plate 423 are impacted into the inside of the collecting frame 422 by the fluid. By setting the filter assembly 42 to filter the fuel, the solid impurities in the fuel are reduced, and the nozzle is prevented from being blocked. The collecting frame 422 collects the impurities into the airflow, reduces the probability of the sieve plate 423 being blocked, and avoids the filtering performance of the sieve plate 423 from declining.
[0025] The ejection assembly 43 includes a sliding frame 431, the outer side of the sliding frame 431 is slidably connected to the inner side of the fixed shell 41, a compression spring 432 is fixedly connected to the bottom of the sliding frame 431, the bottom end of the compression spring 432 is fixedly connected to the bottom of the inner cavity of the fixed shell 41, and a discharge hole 433 is opened in the wall of the sliding frame 431. When in use, the filtered fuel moves downward to the inside of the sliding frame 431, the fuel drives the sliding frame 431 to move downward, and the sliding frame 431 drives the compression spring 432 to compress. When the discharge hole 433 is opened, the fuel moves downward to the inside of the sliding frame 431, and the fuel drives the sliding frame 431 to move downward. The sliding frame 431 drives the compression spring 432 to compress. When the material hole 433 moves to the bottom of the fixed shell 41, the fuel flows to the outside along the discharge hole 433. After the fuel stops spraying, the compression spring 432 drives the spray assembly 43 to reset under the action of its own elastic force, and the sliding frame 431 drives the discharge hole 433 to move to the inside of the fixed shell 41. The fixed shell 41 blocks the discharge hole 433. The fuel is sprayed out by setting the spray assembly 43. After the fuel spraying stops, the discharge hole 433 shrinks to the inside of the fixed shell 41 to prevent the fuel from flowing out and reduce the probability of fuel leakage.
[0026] Working principle:
[0027] When in use, the housing 2 is fixed by the fixing seat 1. Before use, the threaded column 34 can be rotated, and the threaded column 34 drives the sliding column 35 to move upward, and the threaded column 34 stretches the rebound spring 33, and the tensile force of the rebound spring 33 on the blocking block 32 changes. By adjusting the threaded column 34, the tensile force of the rebound spring 33 on the blocking block 32 is adjusted, so that the blocking block 32 is closely attached to the surface of the baffle 31, and the blocking block 32 can block the baffle 31 to prevent the fuel from entering or leaving.
[0028] When in use, the fuel is fed into the housing 2 through the feed hole 5, and the fuel flows along the housing 2 to the anti-backflow device 3. The fuel flows downward and drives the block 32 to flow downward. The block 32 drives the rebound spring 33 to stretch. The fuel flows downward along the gap between the block 32 and the baffle 31 to the ejection device 4. The fuel flows along the guide plate 421 to the inside of the collecting frame 422. The sieve plate 423 in the filter assembly 42 filters the fuel. The impurities filtered by the sieve plate 423 are impacted by the fluid into the collecting frame 422. The collecting frame 422 collects the impurities to prevent the impurities from clogging the sieve plate 423. The filtered fuel moves downward to the inside of the sliding frame 431. The fuel drives the sliding frame 431 to move downward. The sliding frame 431 drives the compression spring 432 to compress. When the discharge hole 433 moves to the bottom of the fixed shell 41, the fuel flows to the outside along the discharge hole 433.
[0029] After the fuel spraying stops, the compression spring 432 drives the spray assembly 43 to reset under the action of its own elastic force, and the sliding frame 431 drives the discharge hole 433 to move to the inside of the fixed shell 41. The fixed shell 41 blocks the discharge hole 433. The rebound spring 33 drives the blocking block 32 to move upward under the action of its own elastic force, so that the blocking block 32 is tightly attached to the surface of the baffle 31, and the refluxed fuel is blocked by the blocking block 32 and cannot flow back.
[0030] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.
Claims
1. A fuel nozzle capable of preventing backflow for aviation fuel, characterized in that: include: Fixed seat (1); A housing (2), the outer side of the housing (2) being fixedly connected to the inner side of the fixing seat (1); A backflow prevention device (3), the outer side of the backflow prevention device (3) being slidably connected to the inner side of the housing (2), and the backflow prevention device (3) being used to prevent fuel from flowing back; A spray device (4), the outer side of the spray device (4) is fixedly connected to the bottom of the inner cavity of the shell (2), and the spray device (4) is used to spray fuel; A feed hole (5) is provided in the wall of the outer shell (2), and the feed hole (5) is used to feed fuel into the inner side of the outer shell (2).
2. The fuel nozzle with anti-backflow function for aviation fuel according to claim 1, characterized in that: The backflow prevention device (3) comprises a baffle (31), a blocking block (32) is slidably connected to the inner side of the baffle (31), a rebound spring (33) is fixedly connected to the top of the rebound spring (33), a threaded column (34) is fixedly connected to the top of the rebound spring (33), and a sliding column (35) is fixedly connected to the center of the bottom of the threaded column (34).
3. The fuel nozzle capable of preventing backflow for aviation fuel according to claim 2, characterized in that: The outer side of the baffle (31) is fixedly connected to the inner side of the outer shell (2), the outer side of the threaded column (34) is threadedly connected to the top of the inner side of the outer shell (2), and the outer side of the sliding column (35) is slidably connected to the inner side of the blocking block (32).
4. The fuel nozzle with anti-backflow function for aviation fuel according to claim 1, characterized in that: The spraying device (4) comprises a fixed shell (41), the outer side of the fixed shell (41) is fixedly connected to the bottom of the inner cavity of the outer shell (2), the inner side of the fixed shell (41) is fixedly connected to a filter assembly (42), and the bottom of the fixed shell (41) is slidably connected to a spraying assembly (43).
5. The fuel nozzle capable of preventing backflow for aviation fuel according to claim 4, characterized in that: The filter assembly (42) comprises a guide plate (421), the bottom of the guide plate (421) is fixedly connected to the top of the fixed shell (41), the outer side of the guide plate (421) is fixedly connected to the inner side of the outer shell (2), the bottom of the guide plate (421) is fixedly connected to a collection frame (422), the outer side of the collection frame (422) is fixedly connected to the inner side of the fixed shell (41), and the bottom of the inner cavity of the collection frame (422) is fixedly connected to a sieve plate (423).
6. The fuel nozzle capable of preventing backflow for aviation fuel according to claim 4, characterized in that: The ejection assembly (43) comprises a sliding frame (431), the outer side of the sliding frame (431) is slidably connected to the inner side of the fixed shell (41), a compression spring (432) is fixedly connected to the bottom of the sliding frame (431), the bottom end of the compression spring (432) is fixedly connected to the bottom of the inner cavity of the fixed shell (41), and a discharge hole (433) is opened in the wall of the sliding frame (431).