Engine air intake guard

Abstract

The application relates to the technical field of helicopters, in particular to an engine air inlet protection device, which comprises an anti-icing box, a mounting block is fixedly connected to the anti-icing box, an air inlet hole is formed in the anti-icing box, a fixing ring is fixedly connected in the anti-icing box, a heating net is clamped in the fixing ring, a ring groove is formed in the fixing ring, the heating net is embedded in the ring groove, a rotating shaft is rotatably arranged in the anti-icing box, an eccentric shaft is fixedly connected to the rotating shaft, an eccentric block is rotatably connected to the eccentric shaft, a connecting rod is fixedly connected to the eccentric block, the connecting rod is fixedly connected to the heating net, a sand prevention cylinder is fixedly connected to the anti-icing box, a guide vane is fixedly connected in the sand prevention cylinder, and a sand discharging hole is formed in the sand prevention cylinder.

Description

Technical Field

[0001] This application relates to the field of helicopter technology, and in particular to an engine air intake protection device. Background Technology

[0002] When helicopters fly in dusty environments, especially during takeoff, the rotor blades stir up dust from the ground, filling the air with it. The engine then draws in air containing a large amount of dust, which can damage engine blades, increase engine failure rates, shorten engine life, and endanger the safety of the helicopter's crew. In harsh environmental conditions, protective devices must be installed on the engine air intakes to maintain the helicopter's ability to fly.

[0003] Existing helicopter engine air intake systems typically have an air intake duct installed in front of the engine air inlet. The air intake duct may have heating and anti-icing functions. A wire mesh is installed at the air intake duct inlet to prevent large objects from entering the engine and causing damage.

[0004] The existing technical solutions mentioned above have the following drawbacks: the existing helicopter engine intake system does not have a sand-proof device. If the engine flies in a sandy environment, a large amount of sand and dust will enter the engine, causing damage and increasing the engine failure rate. Utility Model Content

[0005] This application provides an engine intake protection device to reduce sand and dust entering the engine and lower the engine failure rate.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] An engine intake protection device includes a refrigerator, a mounting block fixedly connected to the refrigerator, an air intake hole on the refrigerator, a fixing ring fixedly connected inside the refrigerator, a heating mesh snapped into the fixing ring, a groove on the fixing ring, the heating mesh embedded in the groove, a rotating shaft rotatably mounted inside the refrigerator, an eccentric shaft fixedly connected to the rotating shaft, an eccentric block rotatably connected to the eccentric shaft, a connecting rod fixedly connected to the eccentric block, the connecting rod fixedly connected to the heating mesh, a sand-proof cylinder fixedly mounted on the refrigerator, a guide vane fixedly mounted inside the sand-proof cylinder, and a sand discharge hole on the sand-proof cylinder.

[0008] By adopting the above technical solution, the guide vane can guide the air to form a vortex when passing through the sand filter. Under the action of centrifugal force, sand and dust particles are discharged from the sand filter through the sand discharge hole. The heating mesh inside the filter can generate heat, reducing the risk of engine performance degradation or failure caused by icing at the engine intake. The turbine drives the rotating shaft and eccentric shaft to rotate, causing the heating mesh to vibrate inside the filter, which can reduce the risk of surface icing due to low heating mesh power, ensuring the stability and safety of the intake protection device. By guiding the air to form a vortex through the guide vane inside the sand filter, sand and dust particles move along the inner wall of the sand filter and are discharged from the sand discharge hole, which can reduce the sand and dust entering the engine and reduce the engine failure rate.

[0009] Optionally, a filter cover is connected to the sandproof cylinder.

[0010] By adopting the above technical solution, the filter cover can filter out larger diameter sand and dust particles in the air, assist the guide vanes and sand discharge holes in discharging sand, and reduce the sand and dust entering the engine.

[0011] Optionally, the filter cover has a strip-shaped groove.

[0012] By adopting the above technical solution, the grooves opened on the filter cover can guide larger diameter sand and dust particles to slide out from the end face of the filter cover, reducing the risk of blocked sand and dust particles accumulating on the filter cover and causing it to become clogged.

[0013] Optionally, a limiting ring is fixedly connected to the sandproof cylinder, a limiting rod is fixedly connected to the limiting ring, a positioning ring is fixedly connected to the filter cover, the positioning ring is sleeved on the limiting rod, and an elastic element is sleeved on the limiting rod, with the elastic element located between the limiting ring and the positioning ring.

[0014] By adopting the above technical solution, the filter cover can vibrate on the intake protection device with the vibration generated when the engine is working, reducing the sand and dust particles accumulated on the end face of the filter cover and ensuring the stability of the filter cover's operation.

[0015] Optionally, a sand discharge cover is fixedly connected to the sand shield cylinder, with an air duct passing through one end of the sand discharge cover and a sand discharge port opened at the other end of the sand discharge cover.

[0016] By adopting the above technical solution, the sand and dust discharged from the sand discharge hole can be discharged from the sand discharge port of the sand discharge cover, thereby increasing the efficiency of the air intake protection device in discharging sand and dust.

[0017] Optionally, the sand discharge port is inclined away from the sand control cylinder.

[0018] By adopting the above technical solution, the sand discharge port of the sand discharge hood is tilted away from the sand shield cylinder, which can make the sand and dust discharge away from the sand shield cylinder, reducing the risk of sand and dust being sucked back into the sand shield cylinder and increasing the load on the air intake protection device.

[0019] Optionally, an air intake mesh is fixedly connected to the opening of the air intake hole.

[0020] By adopting the above technical solution, the air intake mesh at the air intake port can block foreign objects such as sand and branches from entering the engine air intake, intercept large sand and foreign objects, reduce the sand and dust entering the engine, reduce the engine failure rate, and reduce the risk of mechanical damage caused by large sand and foreign objects being sucked into the engine.

[0021] Optionally, the refrigerator is hinged with an air inlet cover, and a hydraulic rod is installed on the refrigerator, with the output end of the hydraulic rod connected to the air inlet cover.

[0022] By adopting the above technical solution, when flying in an environment with low dust levels, the hydraulic rod is controlled to retract and open the air intake cover to increase the airflow into the engine air intake, thus ensuring the engine's air intake volume and output power.

[0023] In summary, this application has the following technical effects:

[0024] 1. By incorporating anti-refrigeration devices, sand-proof cylinders, guide vanes, and sand discharge holes, the risk of surface icing due to low heating grid power can be reduced, ensuring the stability and safety of the intake protection device. The guide vanes inside the sand-proof cylinder guide the air to form a vortex, causing sand and dust particles to move along the inner wall of the sand-proof cylinder and be discharged from the sand discharge holes, thereby reducing the amount of sand and dust entering the engine and lowering the engine failure rate.

[0025] 2. By setting a limit ring, a positioning ring, a limit rod and an elastic element, the filter cover can vibrate on the intake protection device with the vibration generated when the engine is working, reducing the sand and dust particles accumulated on the end face of the filter cover and ensuring the stability of the filter cover's operation.

[0026] 3. By incorporating an air intake cover and hydraulic struts, when flying in environments with low dust levels, the hydraulic struts are retracted to open the air intake cover, increasing the airflow into the engine intake and ensuring engine intake volume and output power. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the object of this application;

[0028] Figure 2 This is a prominent structural diagram of the refrigerator-proof structure of this application;

[0029] Figure 3 This is a prominent structural diagram of the sand shield, guide vane, sand discharge hole, and sand discharge cover of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Anti-refrigeration device; 11. Mounting block; 12. Air inlet; 13. Fixing ring; 14. Heating mesh; 15. Air inlet cover; 16. Hydraulic rod; 2. Rotating shaft; 21. Turbine; 22. Eccentric shaft; 23. Eccentric block; 24. Connecting rod; 3. Sandproof cylinder; 31. Filter cover; 311. Strip groove; 32. Limiting ring; 33. Positioning ring; 34. Limiting rod; 35. Elastic element; 4. Guide plate; 5. Sand discharge hole; 6. Sand discharge cover; 61. Air intake pipe; 62. Sand discharge port. Detailed Implementation

[0031] The present application will be further described in detail below with reference to the accompanying drawings.

[0032] This application discloses an engine intake protection device, referring to... Figure 1 The air intake protection device includes a refrigerator 1. An installation block 11 is welded to one side wall of the refrigerator 1. Four installation blocks 11 are spaced apart along the edge of the side wall of the refrigerator 1. The installation blocks 11 are provided with installation holes for passing through fixing bolts. An air intake hole 12 is provided on the side wall of the refrigerator 1 on the side where the installation block 11 is provided. The air intake hole 12 is connected to the air intake port of the engine. An air intake mesh is welded to the opening of the air intake hole 12.

[0033] Reference Figure 2 A fixing ring 13 is welded to the inner wall of the refrigerator 1. Two fixing rings 13 are spaced apart along the inner wall of the refrigerator 1. The inner wall of the fixing ring 13 has a groove. A heating mesh 14 is snapped into the fixing ring 13. The edge of the heating mesh 14 is embedded in the groove. A rotating shaft 2 is inserted into the refrigerator 1 and is rotatably connected to the refrigerator 1. The rotating shaft 2 passes through the two heating meshes 14. A turbine 21 is fixed to one end of the rotating shaft 2 by bolts. The turbine 21 is rotatably set at the connection between the refrigerator 1 and the sandproof cylinder 3, and the turbine 21 is located at one end of the sandproof cylinder 3. An eccentric shaft 22 is welded onto the shaft 2. Two eccentric shafts 22 are spaced apart along the length of the shaft 2. The two eccentric shafts 22 correspond one-to-one with the two heating grids 14. An eccentric block 23 is sleeved on the eccentric shaft 22. The eccentric block 23 is sleeved on the shaft 2 and the eccentric shaft 22. The eccentric block 23 is rotatably connected to the shaft 2 and the eccentric shaft 22. A connecting rod 24 passes through a section of the eccentric block 23 away from the shaft 2. The connecting rod 24 is rotatably connected to the eccentric block 23. One end of the connecting rod 24 extends out of the eccentric block 23 and is welded to the heating grid 14 that is close to it.

[0034] Reference Figure 2 The bottom surface of the refrigerator 1 is hinged with an air inlet cover 15. There are two air inlet covers 15 spaced apart. A hydraulic rod 16 is installed at the bottom of the refrigerator 1. There are two hydraulic rods 16 spaced apart and they correspond one-to-one with the two air inlet covers 15. The output end of the hydraulic rod 16 is rotatably connected to the air inlet cover 15 that is closest to it.

[0035] Reference Figure 1 and Figure 3 A sand-proof cylinder 3 is connected to the side wall of the refrigerator 1 opposite to the air inlet 12. One end of the sand-proof cylinder 3 is welded to the side wall of the refrigerator 1, and the interior of the sand-proof cylinder 3 is connected to the interior of the refrigerator 1. The other end of the sand-proof cylinder 3 is machined into an oblique opening, and a filter cover 31 is connected to the oblique opening end of the sand-proof cylinder 3. The filter cover 31 is fitted onto the opening end of the sand-proof cylinder 3. The filter cover 31 has a strip groove 311, and multiple strip grooves 311 are spaced apart along the end face of the filter cover 31. The peripheral wall of the sand-proof cylinder 3 near the filter cover 31 is... A limiting ring 32 is welded on the side wall of the limiting ring 32 facing the anti-sand cylinder 1. A limiting rod 34 is welded on the side wall of the limiting ring 32. Four limiting rods 34 are arranged at intervals along the limiting ring 32. A positioning ring 33 is welded on the inner wall of the filter cover 31 near the anti-sand cylinder 3. The positioning ring 33 is sleeved on the peripheral wall of the anti-sand cylinder 3. The limiting rod 34 passes through the positioning ring 33 and is slidably connected to the positioning ring 33. An elastic element 35 is sleeved on the limiting rod 34. In this embodiment, the elastic element 35 is a spring. The two ends of the elastic element 35 abut against the side walls of the limiting ring 32 and the positioning ring 33, respectively.

[0036] Reference Figure 3 A guide vane 4 is welded to the inner wall of the sand-proof cylinder 3 near the filter cover 31. A sand discharge hole 5 is opened on the peripheral wall of the sand-proof cylinder 3 near the refrigerator 1. Multiple sand discharge holes 5 are arranged at intervals along the peripheral wall of the sand-proof cylinder 3. A sand discharge cover 6 is fitted on the peripheral wall of the sand-proof cylinder 3 where the sand discharge hole 5 is opened. The sand discharge cover 6 is welded to the peripheral wall of the sand-proof cylinder 3. An air intake pipe 61 is inserted through the end face of the sand discharge cover 6 near the filter cover 31. Four air intake pipes 61 are arranged at intervals along the end face of the sand discharge cover 6. One end of the air intake pipe 61 is located inside the sand discharge cover 6, and the other end is connected to the air source. A sand discharge port 62 is opened at the end of the sand discharge cover 6 near the refrigerator 1. The opening of the sand discharge port 62 is inclined away from the sand-proof cylinder 3.

[0037] When using this air intake protection device, the fixing bolts are passed through the mounting holes on the mounting block 11 to facilitate fixing the air intake protection device to the engine air intake. When the engine is running, air enters the sand filter 3 from one end. The guide vane 4 guides the air to form a vortex as it passes through the sand filter 3, causing sand and dust particles in the air to slide along the inner wall of the sand filter 3. When the sand and dust particles move to the sand discharge hole 5, they are discharged from the sand filter 3 through the sand discharge hole 5 under the action of centrifugal force. The air continues to flow through the sand filter 3 into the anti-freezing chamber 1. The heating mesh 14 inside the anti-freezing chamber 1 can generate heat, reducing the risk of engine performance degradation or failure caused by icing at the engine air intake. By guiding the air to form a vortex through the guide vane 4 inside the sand filter 3, the sand and dust particles move along the inner wall of the sand filter 3 and are discharged from the sand discharge hole 5, which can reduce the sand and dust entering the engine and reduce the engine failure rate.

[0038] When this intake protection device is used, the filter cover 31 can filter larger diameter sand and dust particles in the air, assisting the guide vane 4 and sand discharge hole 5 in discharging sand and reducing sand and dust entering the engine. The inclined sand-proof cylinder 3 opening and the filter cover 31 can increase the area of ​​the filter cover 31, increase the area of ​​the filter cover 31 for filtering sand and dust, and reduce the resistance of the filter cover 31 to the engine intake. The strip groove 311 opened on the filter cover 31 can guide larger diameter sand and dust particles to slide out from the end face of the filter cover 31, reducing the risk of blocked sand and dust particles accumulating on the filter cover 31 and causing the filter cover 31 to become clogged. The filter cover 31, connected with the positioning ring 33, is slidably connected to the sand-proof cylinder 3 through the limiting ring 32, the limiting rod 34 and the elastic element 35, which allows the filter cover 31 to vibrate on the intake protection device with the vibration generated when the engine is running, reducing the sand and dust particles accumulating on the end face of the filter cover 31 and ensuring the stability of the filter cover 31 in operation.

[0039] When this air intake protection device is used, the air entering the refrigerator 1 from the sand shield 3 can drive the turbine 21 to rotate. The turbine 21 drives the rotating shaft 2 and the eccentric shaft 22 to rotate, causing the eccentric block 23 sleeved on the rotating shaft 2 and the eccentric shaft 22 to drive the connecting rod 24 to swing, thereby causing the heating grid 14 to vibrate inside the refrigerator 1. This can reduce the risk of surface icing caused by low power of the heating grid 14 and ensure the stability and safety of the air intake protection device.

[0040] When this air intake protection device is used, the end of the air intake pipe 61 located inside the sand discharge hood 6 ejects gas, which can drive the sand and dust discharged from the sand discharge hole 5 to be discharged from the sand discharge port 62 of the sand discharge hood 6, increasing the efficiency of the air intake protection device in discharging sand and dust. The sand discharge port 62 of the sand discharge hood 6 is inclined away from the sand shield cylinder 3, which can cause the sand and dust to be discharged away from the sand shield cylinder 3, reducing the risk of sand and dust being re-inhaled into the sand shield cylinder 3, thus increasing the load on the air intake protection device.

[0041] When using this air intake protection device, during flight in environments with low dust levels, the control hydraulic rod 16 retracts to open the air intake cover 15, thereby increasing the airflow into the engine air intake and ensuring the engine's air intake volume and output power.

[0042] The air intake mesh at the air intake 12 can block foreign objects such as sand and branches from entering the engine air intake, intercept large sand and foreign objects, reduce the sand and dust entering the engine, reduce the engine failure rate, and reduce the risk of mechanical damage caused by large sand and foreign objects being sucked into the engine.

[0043] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. An engine intake protection device, characterized in that, The air intake protection device includes a refrigerator (1), a mounting block (11) is fixedly connected to the refrigerator (1), an air intake hole (12) is opened on the refrigerator (1), a fixing ring (13) is fixedly connected inside the refrigerator (1), a heating net (14) is snapped into the fixing ring (13), a ring groove is opened on the fixing ring (13), the heating net (14) is embedded in the ring groove, a rotating shaft (2) is rotatably arranged inside the refrigerator (1), an eccentric shaft (22) is fixedly connected to the rotating shaft (2), an eccentric block (23) is rotatably connected to the eccentric shaft (22), a connecting rod (24) is fixedly connected to the eccentric block (23), the connecting rod (24) is fixedly connected to the heating net (14), a sand-proof cylinder (3) is fixedly connected to the refrigerator (1), a guide plate (4) is fixedly connected inside the sand-proof cylinder (3), and a sand discharge hole (5) is opened on the sand-proof cylinder (3).

2. The engine intake protection device according to claim 1, characterized in that: The sand-proof cylinder (3) is connected to a filter cover (31).

3. The engine intake protection device according to claim 2, characterized in that: The filter cover (31) has a strip groove (311).

4. An engine intake protection device according to claim 3, characterized in that: A limiting ring (32) is fixedly connected to the sand-proof cylinder (3), a limiting rod (34) is fixedly connected to the limiting ring (32), a positioning ring (33) is fixedly connected to the filter cover (31), the positioning ring (33) is sleeved on the limiting rod (34), an elastic element (35) is sleeved on the limiting rod (34), and the elastic element (35) is located between the limiting ring (32) and the positioning ring (33).

5. An engine intake protection device according to claim 1, characterized in that: A sand discharge cover (6) is fixedly connected to the sand shield (3). One end of the sand discharge cover (6) is provided with an air intake pipe (61), and the other end of the sand discharge cover (6) is provided with a sand discharge port (62).

6. An engine intake protection device according to claim 5, characterized in that: The sand discharge port (62) is inclined away from the sand control cylinder (3).

7. An engine intake protection device according to claim 6, characterized in that: An air inlet mesh is fixedly connected to the opening of the air inlet (12).

8. An engine intake protection device according to claim 7, characterized in that: An air inlet cover (15) is hinged to the refrigerator (1), and a hydraulic rod (16) is installed on the refrigerator (1). The output end of the hydraulic rod (16) is connected to the air inlet cover (15).

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