Constant-pressure impeller of high-speed fuel pump

Abstract

The utility model relates to the technical field of impellers, and discloses a high-speed fuel pump constant-pressure impeller which comprises a cover plate, blades are connected to the upper surface of the cover plate in a sliding mode, a rotating shaft is fixedly connected to the interiors of the blades, a main bevel gear is fixedly connected to the outer wall of the rotating shaft, and an auxiliary bevel gear is arranged in the cover plate. The outer wall of the auxiliary bevel gear is meshed with the outer wall of the main bevel gear, a connecting rod is fixedly connected to the interior of the auxiliary bevel gear, a worm is fixedly connected to the outer wall of the connecting rod, a worm gear is rotationally connected to the interior of the cover plate, and the outer wall of the worm is meshed with the outer wall of the worm gear. According to the constant-pressure impeller, the rotating blades drive the limiting plates to be clamped in the cover plate, meanwhile, the auxiliary bevel gear drives the worm to rotate the worm gear, the worm and the worm gear can be self-locked, the problem that most of existing constant-pressure impellers cannot adjust the blade angle is solved, the practicability of the impeller is improved, and the application range of the impeller is widened.

Description

Technical Field

[0001] The utility model relates to the technical field of impellers, in particular to a constant-pressure impeller for a high-speed fuel pump. Background Art

[0002] A high-speed fuel pump usually refers to a fuel pump that can run at a higher speed. In an internal combustion engine, such a pump is used to provide sufficient fuel pressure and flow to meet the needs of the high-speed engine. At the same time, the fuel pump will generate huge pressure during operation, and a constant pressure impeller is required to reduce the strong pressure inside the pump.

[0003] A Chinese patent document with a search announcement number of CN217713058U discloses an impeller and a fuel pump thereof, wherein the impeller comprises an impeller hub rotatably connected to a motor, a circular cover plate is fixedly sleeved on the impeller hub, a plurality of first blades are evenly arranged in the circumferential direction of one side of the cover plate, the first blades are arc-shaped, a boost flow channel is formed between two adjacent first blades and the cover plate, and a second blade is arranged between two adjacent first blades; the impeller structure of this scheme is simple, and the impeller size is small, so it is suitable for use in a helicopter boost fuel pump; and the impeller has a strong boosting capacity, a low flow energy loss of the fuel, and the fuel is not prone to cavitation, and when the fuel flow rate varies within a large range, its output pressure can be kept constant, but this scheme cannot adjust the angle corresponding to the blade, so that the blade can only transport oil at a single angle. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a constant pressure impeller for a high-speed fuel pump, aiming to improve the problem that most of the existing constant pressure impellers cannot adjust the blade angle.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a constant-pressure impeller of a high-speed fuel pump comprises a cover plate, the upper surface of the cover plate is slidably connected with a blade, the interior of the blade is fixedly connected with a rotating shaft, the outer wall of the rotating shaft is fixedly connected with a main bevel gear, a secondary bevel gear is arranged inside the cover plate, the outer wall of the secondary bevel gear is meshed with the outer wall of the main bevel gear, the interior of the secondary bevel gear is fixedly connected with a connecting rod, the outer wall of the connecting rod is fixedly connected with a worm, the interior of the cover plate is rotatably connected with a worm wheel, the outer wall of the worm gear is meshed with the outer wall of the worm wheel, the outer wall of the rotating shaft is fixedly connected with a baffle, the interior of the baffle is fixedly connected with a straight rod, the outer wall of the straight rod is sleeved with a spring 1, one end of the spring 1 is fixedly connected to the interior of the baffle, the other end of the spring 1 is fixedly connected to a limiting plate, the outer wall of the straight rod is slidably connected to the interior of the limiting plate, and a connecting component is arranged inside the cover plate.

[0006] Furthermore, the connection assembly comprises a connection ring, and an outer wall of the connection ring is slidably connected to the inside of the cover plate.

[0007] Furthermore, a hub is fixedly connected to the outer wall of the connecting ring, and a lower surface of the hub is attached to an upper surface of the cover plate.

[0008] Furthermore, a connecting hole is provided inside the wheel hub, a sliding groove is provided inside the cover plate, and the outer wall of the connecting ring is slidably connected inside the sliding groove.

[0009] Furthermore, a slider is fixedly connected to the outer wall of the connecting ring, and the outer wall of the slider is slidably connected to the inside of the cover plate.

[0010] Furthermore, the interior of the slider is slidably connected to a limiting ball, and a second spring is arranged inside the slider.

[0011] Furthermore, both ends of the second spring are fixedly connected to the outer wall of the limiting ball.

[0012] Furthermore, a clamping block is fixedly connected to the outer wall of the limiting ball, and the outer wall of the clamping block is slidably connected to the inside of the sliding block.

[0013] The utility model has the following beneficial effects:

[0014] 1. In the utility model, firstly, the limit plate is driven to be stuck inside the cover plate by rotating the blade, and at the same time, the secondary bevel gear drives the worm to rotate the worm wheel. The worm and the worm wheel can be self-locking, so as to achieve the effect of adjusting the corresponding angle of the blade, which solves the problem that most of the existing constant pressure impellers cannot adjust the blade angle, improves the practicability of the impeller, and expands the application range of the impeller.

[0015] 2. In the utility model, the limiting ball and the slider are both stuck inside the cover plate, and the connecting ring is connected to the hub, so as to achieve the effect of quick disassembly and assembly of the hub, solving the problem that most of the existing impeller hubs are fixed in a specific position and cannot be disassembled and replaced, thereby improving the disassembly of the impeller and facilitating the use of the impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of the constant pressure impeller of the high-speed fuel pump proposed by the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the connecting rod portion of the constant pressure impeller of the high-speed fuel pump proposed by the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the connecting ring portion of the constant pressure impeller of the high-speed fuel pump proposed by the utility model;

[0019] Figure 4 This is a cross-sectional view of the internal structure of the slider of the constant pressure impeller of the high-speed fuel pump proposed by the utility model.

[0020] Legend:

[0021] 1. Cover plate; 2. Blade; 3. Rotating shaft; 4. Main bevel gear; 5. Sub bevel gear; 6. Connecting rod; 7. Worm; 8. Worm wheel; 9. Baffle; 10. Limiting plate; 11. Spring 1; 12. Straight rod; 13. Connecting ring; 14. Hub; 15. Connecting hole; 16. Slide groove; 17. Sliding block; 18. Limiting ball; 19. Spring 2; 20. Block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1-2 , an embodiment provided by the utility model: a constant pressure impeller of a high-speed fuel pump comprises a cover plate 1, a blade 2 is slidably connected to the upper surface of the cover plate 1, a rotating shaft 3 is fixedly connected inside the blade 2, a main bevel gear 4 is fixedly connected to the outer wall of the rotating shaft 3, a secondary bevel gear 5 is arranged inside the cover plate 1, the outer wall of the secondary bevel gear 5 is meshed with the outer wall of the main bevel gear 4, a connecting rod 6 is fixedly connected inside the secondary bevel gear 5, a worm 7 is fixedly connected to the outer wall of the connecting rod 6, a worm wheel 8 is rotatably connected inside the cover plate 1, the outer wall of the worm 7 is meshed with the outer wall of the worm wheel 8, a baffle plate 9 is fixedly connected to the outer wall of the rotating shaft 3, a straight rod 12 is fixedly connected inside the baffle plate 9, a spring 11 is sleeved on the outer wall of the straight rod 12, one end of the spring 11 is fixedly connected to the inside of the baffle plate 9, the other end of the spring 11 is fixedly connected to the limiting plate 10, the outer wall of the straight rod 12 is slidably connected to the inside of the limiting plate 10, and a connecting component is arranged inside the cover plate 1;

[0024] Specifically, when the angle of the blade 2 needs to be adjusted, the entire transmission chain can be started by rotating the blade 2. The rotation of the blade 2 will drive the rotating shaft 3 to rotate, and the rotation of the rotating shaft 3 will further drive the rotation of the main bevel gear 4, wherein the main bevel gear 4 and the auxiliary bevel gear 5 are meshed with each other, so that the auxiliary bevel gear 5 will rotate with the main bevel gear 4. This meshing relationship ensures the continuous transmission of power. The rotation of the auxiliary bevel gear 5 will drive the worm 7 to rotate, and the worm 7 and the worm wheel 8 are meshed with each other, so that the worm wheel 8 can rotate. The worm wheel 8 and the worm 7 have a self-locking function, which allows the blade 2 to remain stable after the angle is adjusted. It will not rotate at will. At the same time, the rotating shaft 3 will also drive the baffle 9 to rotate during the rotation process. The limit plate 10 can slide along the inside of the cover plate 1 to adapt to different angle adjustment requirements. In this process, the limit plate 10 will compress the spring 11, and the straight rod 12 will limit the position of the limit plate 10 and the spring 11. When the limit plate 10 slides into the corresponding groove inside the cover plate 1, the spring 11 will release its elastic force, and the rebound force makes the limit plate 10 stably fixed in the new position, thereby realizing the angle adjustment of the blade 2, which not only improves the practicability of the impeller, but also expands the application range of the impeller.

[0025] Reference Figure 1 and Figure 3 , the connection assembly includes a connection ring 13, the outer wall of the connection ring 13 is slidably connected to the inside of the cover plate 1;

[0026] Specifically, the connecting ring 13 slides inside the cover plate 1 so that the connecting ring 13 can fix the hub 14 on the upper surface of the cover plate 1 , thereby achieving the effect of connecting the cover plate 1 and the hub 14 .

[0027] Reference Figure 1 and Figure 3-4 The outer wall of the connecting ring 13 is fixedly connected with a wheel hub 14, and the lower surface of the wheel hub 14 is attached to the upper surface of the cover plate 1; a connecting hole 15 is provided inside the wheel hub 14, and a slide groove 16 is provided inside the cover plate 1, and the outer wall of the connecting ring 13 is slidably connected to the inside of the slide groove 16; a slider 17 is fixedly connected to the outer wall of the connecting ring 13, and the outer wall of the slider 17 is slidably connected to the inside of the cover plate 1; the inside of the slider 17 is slidably connected to a limiting ball 18, and a spring 2 19 is arranged inside the slider 17; both ends of the spring 2 19 are fixedly connected to the outer wall of the limiting ball 18; a clamping block 20 is fixedly connected to the outer wall of the limiting ball 18, and the outer wall of the clamping block 20 is slidably connected to the inside of the slider 17;

[0028] Specifically, by rotating the wheel hub 14, the slider 17 can slide freely inside the slide groove 16. In this process, the limiting ball 18 plays a key role. It will compress the spring 2 19 inward, so that the spring 2 19 can provide elastic force for the slider 17 to ensure that it is fixed in the corresponding groove inside the cover 1. In order to further enhance the stability of the slider 17, the block 20 can slide inside the slider 17 to limit the sliding position of the limiting ball 18. This not only improves the assembly efficiency of the wheel hub 14, but also enhances the stability of the wheel hub 14, so that it can maintain excellent performance in various working environments.

[0029] Working principle: when the angle of blade 2 needs to be adjusted, the rotating shaft 3 is driven to rotate by rotating blade 2, and the rotating shaft 3 drives the main bevel gear 4 to rotate. Since the main bevel gear 4 and the sub-bevel gear 5 are meshed with each other, the sub-bevel gear 5 can rotate together with the main bevel gear 4, and then the connecting rod 6 drives the worm 7 to rotate, and then the worm 7 and the worm wheel 8 are meshed with each other, so that the worm wheel 8 can rotate. Since the worm 7 and the worm wheel 8 can be self-locking, the blade 2 will not rotate at will. Then, the baffle 9 can be driven to rotate while the rotating shaft 3 is rotating, so that the limit plate 10 can slide inside the cover plate 1. At this time, the limit plate 10 will compress the spring 11, and the straight rod 12 will slide inside the limit plate 10 to limit the position of the limit plate 10 and the spring 11. When the limit plate 1 0 slides into the corresponding groove inside the cover plate 1, and the spring 11 rebounds the limit plate 10 by the elastic force, so as to achieve the effect of adjusting the corresponding angle of the blade 2, thereby improving the practicability of the impeller and expanding the application range of the impeller. When the hub 14 needs to be quickly assembled, the hub 14 is rotated so that the slider 17 can slide inside the slide groove 16, and the limit ball 18 will compress the spring 2 19 inward. When the slider 17 slides into the corresponding groove inside the cover plate 1, the spring 2 19 will push the limit ball 18 outward by the elastic force, thereby fixing the slider 17. During this period, the block 20 slides inside the slider 17 to limit the sliding position of the limit ball 18, thereby achieving the effect of quickly disassembling and assembling the hub 14, improving the disassembly of the impeller and facilitating the use of the impeller.

[0030] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A constant pressure impeller for a high-speed fuel pump, comprising a cover plate (1), characterized in that: The upper surface of the cover plate (1) is slidably connected to a blade (2); the interior of the blade (2) is fixedly connected to a rotating shaft (3); the outer wall of the rotating shaft (3) is fixedly connected to a main bevel gear (4); a secondary bevel gear (5) is provided inside the cover plate (1); the outer wall of the secondary bevel gear (5) meshes with the outer wall of the main bevel gear (4); a connecting rod (6) is fixedly connected inside the secondary bevel gear (5); the outer wall of the connecting rod (6) is fixedly connected to a worm (7); the interior of the cover plate (1) is rotatably connected to a worm wheel (8); the worm wheel The outer wall of the rotating shaft (3) is meshed with the outer wall of the worm wheel (7), the outer wall of the rotating shaft (3) is fixedly connected to a baffle (9), the interior of the baffle (9) is fixedly connected to a straight rod (12), the outer wall of the straight rod (12) is sleeved with a spring 1 (11), one end of the spring 1 (11) is fixedly connected to the interior of the baffle (9), the other end of the spring 1 (11) is fixedly connected to a limit plate (10), the outer wall of the straight rod (12) is slidably connected to the interior of the limit plate (10), and a connecting component is arranged inside the cover plate (1).

2. The constant pressure impeller of a high-speed fuel pump according to claim 1, characterized in that: The connection assembly comprises a connection ring (13), the outer wall of the connection ring (13) being slidably connected to the interior of the cover plate (1).

3. The constant pressure impeller of a high-speed fuel pump according to claim 2, characterized in that: The outer wall of the connecting ring (13) is fixedly connected to a hub (14), and the lower surface of the hub (14) is attached to the upper surface of the cover plate (1).

4. The constant pressure impeller of a high-speed fuel pump according to claim 3, characterized in that: A connecting hole (15) is provided inside the wheel hub (14), a sliding groove (16) is provided inside the cover plate (1), and the outer wall of the connecting ring (13) is slidably connected inside the sliding groove (16).

5. The constant pressure impeller of a high-speed fuel pump according to claim 4, characterized in that: The outer wall of the connecting ring (13) is fixedly connected to a sliding block (17), and the outer wall of the sliding block (17) is slidably connected to the interior of the cover plate (1).

6. The constant pressure impeller of a high-speed fuel pump according to claim 5, characterized in that: The slider (17) is internally slidably connected to a limiting ball (18), and a second spring (19) is disposed inside the slider (17).

7. The constant pressure impeller of a high-speed fuel pump according to claim 6, characterized in that: Both ends of the second spring (19) are fixedly connected to the outer wall of the limiting ball (18).

8. The constant pressure impeller of a high-speed fuel pump according to claim 7, characterized in that: A clamping block (20) is fixedly connected to the outer wall of the limiting ball (18), and the outer wall of the clamping block (20) is slidably connected to the interior of the sliding block (17).

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