Aircraft high-speed oil pump circulation structure capable of preventing foreign matter from being stuck

Abstract

The utility model relates to the field of aerospace technology discloses a prevent foreign matter jam's aviation high -speed oil pump circulation structure, including the pump body, the top of pump body is provided with motor, the drive end of motor is provided with power conversion mechanism, the inside of pump body is provided with sealing mechanism, sealing mechanism includes bearing, the inside bushing of bearing is in the drive end outside of motor, the outside of motor is provided with connecting assembly, the drive end outside bushing of motor has the shaft shoulder, the outside bushing of shaft shoulder has the gasket, the bottom of gasket is provided with a plurality of swarf groove. In the utility model, the gasket of shaft shoulder outside bushing runs synchronously with shaft shoulder, the cross type swarf groove of its bottom intercepts and collects the tiny foreign matter in the sliding oil when the sliding oil flows, avoids the foreign matter to accumulate in the cooperation gap of shaft shoulder and gasket, solves the traditional oil pump shaft foreign matter jammed shaft, promotes the work reliability of oil pump under the aviation high -speed working condition.

Description

Technical Field

[0001] This utility model relates to the field of aerospace technology, and in particular to a circulation structure for a high-speed aviation oil pump to prevent foreign objects from getting stuck. Background Technology

[0002] The lubrication system of an aircraft engine is mainly used to provide a continuous and stable supply of lubricating oil to high-speed rotating components such as shafts, bearings, and gears during the operation of the aircraft engine. Through the flow of lubricating oil, the components are lubricated, friction is cooled, and impurities are cleaned. This ensures that the aircraft engine can still operate reliably under high-altitude, high-speed, and high-load conditions, and avoids engine failure caused by insufficient lubrication or overheating of components. It is one of the key subsystems for ensuring the flight safety of aircraft.

[0003] A search revealed Chinese patent publication number CN217327651U, which discloses a high-precision lightweight aviation oil pump. The pump includes a pump body with an oil outlet pipe fixedly mounted on it. One end of the oil outlet pipe is connected to the pump body, and the other end is equipped with a connecting mechanism. The connecting mechanism includes a connecting pipe coaxially arranged with the oil outlet pipe. One end of the connecting pipe is fixedly mounted on the oil outlet pipe, and the outer wall of the other end of the connecting pipe has an installation thread. Multiple connecting components are arranged on the connecting pipe, evenly distributed circumferentially between the installation thread and the oil outlet pipe around the axis of the connecting pipe. This high-precision lightweight aviation oil pump, by clamping the external pipe with a compression plate, can prevent the external pipe from falling off, improving the stability of the external pipe connection.

[0004] The aforementioned patent specification mentions that "aerospace high-precision lightweight oil pumps, by clamping external pipes with extrusion plates, can prevent external pipes from falling off and improve the stability of external pipe connections." While this does improve the stability of external pipe connections, many high-speed aerospace oil pump circulation structures rely on a single filter for impurity filtration. When foreign matter flows through the clearance between the oil pump shaft and the shaft shoulder and bearing, it easily accumulates in the clearance, leading to increased shaft rotational resistance. In severe cases, this can cause the oil pump shaft to jam, interrupting lubricating oil circulation, affecting engine lubrication, and easily causing the oil pump shaft to be jammed by foreign objects. This reduces the service life and operational reliability of the oil pump and engine. Therefore, a high-speed aerospace oil pump circulation structure to prevent foreign matter jamming is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a high-speed aviation oil pump circulation structure to prevent foreign objects from jamming, aiming to improve the problem of oil pump shaft jamming by foreign objects in some existing oil pump circulation structures.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A high-speed aviation oil pump circulation structure for preventing foreign object jamming includes a pump body, a motor mounted on the top of the pump body, a power conversion mechanism mounted on the drive end of the motor, a sealing mechanism inside the pump body, an oil inlet fixedly connected to the outside of the pump body, an oil outlet fixedly connected to the outside of the pump body, two pressure relief valves fixedly connected to the outside of the pump body, a bearing including a bearing housing inside the drive end of the motor, a connecting assembly outside the motor, a shoulder mounted outside the drive end of the motor, a gasket mounted outside the shoulder, and multiple chip grooves at the bottom of the gasket.

[0008] As a further description of the above technical solution:

[0009] The power conversion mechanism includes a drive shaft, which is externally fixedly connected to the drive end of the pump body, and an inwardly facing toothed ring is provided on the inner bottom side of the drive shaft.

[0010] As a further description of the above technical solution:

[0011] The bearing is externally fixedly connected to the top of the pump body, and the shoulder is externally slidably connected to the inside of the pump body;

[0012] As a further description of the above technical solution:

[0013] The connecting assembly includes a connecting plate, which is fixedly connected to the outside of the motor. Multiple nuts are threaded around the inside of the connecting plate, and the bottom outer side of the nuts is threaded to the top of the pump body.

[0014] As a further description of the above technical solution:

[0015] A limiting shaft is slidably connected to the bottom inner side of the drive shaft, and a gear is rotatably connected to the outside of the limiting shaft. The external teeth of the gear and the internal gear ring of the drive shaft are meshed with each other.

[0016] As a further description of the above technical solution:

[0017] The bottom of the limiting shaft is fixedly connected to a base, the bottom of the base is fixedly connected to a bottom plate, a sealing ring is sleeved on the outside of the base, the outside of the sealing ring is slidably connected to the bottom of the pump body, and an arc plate is fixedly connected to the top of the base.

[0018] This utility model has the following beneficial effects:

[0019] 1. In this utility model, the axial movement of the shaft is limited by the bearing and the shaft shoulder, thereby achieving coaxiality control during high-speed operation of the shaft system and avoiding abnormal friction between the shaft and other components. At the same time, the gasket sleeved on the outside of the shaft shoulder moves synchronously with the shaft shoulder, and the cross-shaped chip groove at its bottom intercepts and collects tiny foreign objects in the lubricating oil as it flows through, preventing foreign objects from accumulating in the gap between the shaft shoulder and the gasket. Compared with the prior art, this solves the problem of foreign objects jamming the shaft of traditional oil pumps, reduces the risk of oil pump failure, extends the overall service life of the oil pump, and ensures efficient and smooth circulation of lubricating oil, thereby improving the working reliability of the oil pump under high-speed aviation conditions.

[0020] 2. In this utility model, the transmission shaft is directly driven by the motor drive end. The inward gear ring on the bottom inner side of the transmission shaft meshes with the gear outside the limiting shaft, causing the gear to rotate with the gear ring and rotate around the limiting shaft. At the same time, the limiting shaft is fixed to the base plate by the bottom base. The arc plate on the top of the base helps to stabilize the rotation trajectory of the gear. Finally, the rotational power of the motor is converted into the driving force required for the internal lubricating oil circulation of the oil pump, ensuring the continuous and stable operation of the oil pump under high-speed operation conditions. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a high-speed aviation oil pump circulation structure for preventing foreign objects from getting stuck, as proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the drive shaft of a high-speed aviation oil pump circulation structure for preventing foreign objects from getting stuck, as proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the gasket structure of a high-speed aviation oil pump circulation structure to prevent foreign objects from getting stuck, as proposed in this utility model.

[0024] Figure 4 This is a schematic diagram of the oil outlet structure of a high-speed aviation oil pump circulation structure to prevent foreign objects from getting stuck, as proposed in this utility model.

[0025] Legend:

[0026] 1. Pump body; 2. Motor; 3. Oil inlet; 4. Pressure relief valve;

[0027] 5. Sealing mechanism; 51. Bearing; 52. Gasket; 53. Shaft shoulder;

[0028] 54. Connecting assembly; 541. Connecting plate; 542. Nut;

[0029] 55. Chip trough;

[0030] 6. Power conversion mechanism; 61. Drive shaft; 62. Gear; 63. Limiting shaft; 64. Arc plate; 65. Base; 66. Sealing ring; 67. Base plate;

[0031] 7. Oil outlet. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Example:

[0034] A circulation structure for a high-speed aviation oil pump to prevent foreign object jamming, referenced Figures 1 to 3 The system includes a pump body 1, a motor 2 mounted on the top of the pump body 1, a power conversion mechanism 6 mounted on the drive end of the motor 2, the power conversion mechanism 6 converting the rotational power output by the motor 2 into the driving force required for lubricating oil circulation, realizing the transmission and conversion of power. The motor 2 provides power for subsequent power transmission and lubricating oil circulation. The pump body 1 is equipped with a sealing mechanism 5 inside, which prevents lubricating oil leakage and ensures stable operation of the shaft system. The pump body 1 is externally fixedly connected to an oil inlet 3, which guides external lubricating oil into the internal circulation system in an orderly manner. The pump body 1 is externally fixedly connected to an oil outlet 7, which delivers lubricating oil to a specific location. The pump body 1 is externally fixedly connected to two pressure relief valves 4, which isolate the pump body 1 from external environmental impurities and ensure stable internal lubricating oil circulation. The pressure relief valves 4 are used to regulate the internal pressure of the pump body 1. When the pressure exceeds the safe value, the pressure is automatically released to avoid high pressure damage to components. After the pressure is restored, the valves automatically close to maintain stable circulation pressure.

[0035] Specifically, the pump body 1, through its own protective and supporting function, isolates external environmental impurities and provides a stable installation foundation for internal components. The motor 2 on top of the pump body 1 is started, and the motor 2 outputs rotational power, which is transmitted to the power conversion mechanism 6 at the drive end. Driven by the motor 2, the power conversion mechanism 6 begins to operate, converting the rotational power of the motor 2 into the driving force required for lubricating oil circulation. Under the driving force of the motor 2, external lubricating oil tends to flow into the pump body 1, and then flows orderly into the internal circulation system through the oil inlet 3 on the outside of the pump body 1. During the circulation of lubricating oil within the pump body 1, the sealing mechanism 5 inside the pump body 1 functions simultaneously. Through its own structure and cooperation with the shaft system, it restricts abnormal movement of the shaft system, keeping the shaft system in a stable operating state, while preventing lubricating oil leakage from the gap between the shaft system and the pump body 1. The lubricating oil that has completed internal circulation has a tendency to be transported to the outside, and finally, it is transported to a specific location through the oil outlet 7 on the outside of the pump body 1.

[0036] The sealing mechanism 5 includes a bearing 51, which is internally fitted onto the outside of the drive end of the motor 2. The bearing 51 is used to limit the radial movement of the drive end of the motor 2, reduce friction between the shaft and the pump body 1, and ensure stable high-speed operation of the shaft system. A connecting assembly 54 is provided on the outside of the motor 2 to stably fix the motor 2 onto the pump body 1, preventing displacement during operation and ensuring stable power output direction. A shoulder 53 is fitted onto the outside of the drive end of the motor 2, and a gasket 52 is fitted onto the outside of the shoulder 53. The gasket 52 and the shoulder 53 cooperate to achieve a seal. The shoulder 53 acts as an axial limiter, restricting the axial movement of the shaft. The bottom of the gasket 52 is provided with multiple chip grooves 55. The external fixed connection is to the top of the pump body 1. The chip groove 55 is used to intercept and collect small foreign objects in the lubricating oil to prevent the accumulation of foreign objects from causing the shaft to jam. The external sliding connection of the shaft shoulder 53 is to the inside of the pump body 1. The connecting assembly 54 includes a connecting plate 541. The external fixed connection of the connecting plate 541 is to the outside of the motor 2. Multiple nuts 542 are threaded around the inside of the connecting plate 541. The connecting plate 541 increases the contact area between the motor 2 and the pump body 1 and improves the fixing stability. The outer bottom of the nut 542 is threaded to the top inner side of the pump body 1. The nut 542 locks the connecting plate 541 and the pump body 1 through the threaded connection, further strengthening the fixing effect of the motor 2 and preventing the motor 2 from loosening when it is running.

[0037] Specifically, the motor 2 and pump body 1 are stably assembled through the connecting component 54. The connecting plate 541 is fixed to the outside of the motor 2, and the nuts 542 around it are locked to the inner top of the pump body 1 by threads. The connecting plate 541 increases the contact area between the motor 2 and the pump body 1, and the nuts 542 further strengthen the fixing effect, preventing displacement of the motor 2 during operation and ensuring stable power output direction. After the motor 2 is started, the drive end of the motor 2 begins to rotate, and the bearing 51 sleeved on its outside acts synchronously with the drive end, limiting the radial movement of the drive end through its own structure. This reduces friction between the shaft and pump body 1, ensuring the shaft system operates at high speed and stability. Simultaneously, the shoulder 53 on the outside of the drive end of the motor 2 rotates with the drive end, and the shoulder 53 plays an axial limiting role, restricting the axial movement of the shaft. The gasket 52 sleeved on its outside cooperates with the shoulder 53 to achieve a seal, preventing oil leakage. When the lubricating oil circulates through this area in the pump body 1, the chip groove 55 at the bottom of the gasket 52 intercepts and collects small foreign objects in the lubricating oil, preventing foreign objects from accumulating in the fit clearance between the shoulder 53, bearing 51 and shaft, and preventing the shaft from being jammed.

[0038] Reference Figure 1 , Figure 2 and Figure 4The power conversion mechanism 6 includes a drive shaft 61, which is externally fixedly connected to the drive end of the pump body 1. An inwardly facing gear ring is provided on the inner bottom side of the drive shaft 61. A limit shaft 63 is slidably connected to the inner bottom of the drive shaft 61. The drive shaft 61 transmits the rotational power from the drive end of the motor 2 to a gear 62. The limit shaft 63 is rotatably connected to the gear 62. The external teeth of the gear 62 mesh with the internal gear ring of the drive shaft 61. The gear 62 transmits the rotational power of the drive shaft 61 to the limit shaft 63 through meshing with the gear ring of the drive shaft 61. The meshing of the gear ring with the external teeth of the gear 62 achieves the meshing transmission of power, ensuring... To ensure the stability of power transmission, a base 65 is fixedly connected to the bottom of the limiting shaft 63. The limiting shaft 63 acts as a radial limiter for the gear 62, restricting the radial displacement of the gear 62 and ensuring stable meshing operation of the gear 62. A base plate 67 is fixedly connected to the bottom of the base 65. A sealing ring 66 is sleeved on the outside of the base 65. The sealing ring 66 is used to prevent external impurities from entering the pump body 1 from the bottom. The sealing ring 66 is slidably connected to the bottom of the pump body 1. An arc plate 64 is fixedly connected to the top of the base 65. The arc plate 64 is used to help stabilize the rotation trajectory of the gear 62, reduce the radial shaking of the gear 62 during operation, and improve the stability of power transmission.

[0039] Specifically, when the drive end of motor 2 outputs power, the power is transmitted to the power conversion mechanism 6. The transmission shaft 61, which is linked to the drive end of motor 2, begins to rotate. The inward-facing gear ring on its inner bottom side rotates synchronously with the transmission shaft 61. Since the gear ring meshes with the gear 62 outside the limiting shaft 63, the gear 62, driven by the gear ring, tends to rotate around the limiting shaft 63, thereby realizing the meshing transmission of power. During this process, the limiting shaft 63 acts as a radial limiter on the gear 62, restricting the radial displacement of the gear 62 and preventing the gear 62 from disengaging from the meshing trajectory. At the same time, the base... The arc-shaped plate 64 at the top of the base 65 fits the outer contour of the gear 62, further assisting in stabilizing the rotation trajectory of the gear 62, reducing radial wobbling during gear 62 operation, and ensuring stable power transmission. The base plate 67 fixed at the bottom of the base 65 provides bottom support for the entire power conversion mechanism 6, enhancing the structural installation stability. Meanwhile, the sealing ring 66 sleeved on the outside of the base 65 simultaneously prevents external impurities from entering the pump body 1 from the bottom, avoiding impurities from affecting the meshing operation of the gear 62 and the transmission shaft 61, and efficiently and stably converting the rotational power of the motor 2 into the driving force required for lubricating oil circulation.

[0040] The implementation principle of this application embodiment is as follows: the motor 2 can be stably fixed to the top of the pump body 1 by the nuts 542 around the connecting plate 541. When the motor 2 is started, the transmission shaft 61 is driven to rotate synchronously. Since the inward gear ring on the bottom inner side of the transmission shaft 61 meshes with the gear 62 outside the limiting shaft 63, the gear 62 rotates around the limiting shaft 63 while rotating with the gear ring, converting the rotational power of the motor 2 into the driving force required for the circulation of lubricating oil inside the oil pump, and pushing the lubricating oil to flow from the oil inlet 3 to the oil outlet 7.

[0041] During the lubricating oil circulation process, if tiny foreign objects are mixed into the lubricating oil, when the foreign objects flow through the area of ​​the shaft shoulder 53 with the lubricating oil, they will be intercepted and collected by the cross-shaped chip groove 55 at the bottom of the gasket 52 which is sleeved outside the shaft shoulder 53. The cross-shaped chip groove 55 effectively accommodates foreign objects and prevents them from accumulating in the mating gap between the shaft shoulder 53 and the gasket 52, thereby preventing the shaft from being jammed by foreign objects and extending the overall service life of the oil pump.

[0042] During lubricating oil circulation, if the internal pressure of the pump body 1 exceeds the set safety value, the two pressure relief valves 4 fixed on the outside of the pump body 1 will automatically open to discharge the excess pressure through the valves. When the pressure drops to the safe range, the pressure relief valves 4 will automatically close to maintain the internal pressure of the pump body 1 and ensure the normal operation of the lubricating oil circulation. In addition, the sealing ring 66 sleeved on the outside of the base 65 can prevent external impurities from entering the pump body 1, and the shaft shoulder 53 can limit the axial movement of the shaft. At the same time, in conjunction with the radial positioning function of the bearing 51, the working reliability of the entire oil pump circulation structure is further improved.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-speed aviation oil pump circulation structure for preventing foreign object jamming, comprising a pump body (1), characterized in that: The pump body (1) is equipped with a motor (2) at the top, and the drive end of the motor (2) is equipped with a power conversion mechanism (6). The pump body (1) is equipped with a sealing mechanism (5) inside. The pump body (1) is fixedly connected to an oil inlet (3) and an oil outlet (7). The pump body (1) is fixedly connected to two pressure relief valves (4). The sealing mechanism (5) includes a bearing (51), the inside of which is fitted outside the drive end of the motor (2). A connecting component (54) is provided outside the motor (2). A shoulder (53) is fitted outside the drive end of the motor (2). A gasket (52) is fitted outside the shoulder (53). A plurality of chip grooves (55) are provided at the bottom of the gasket (52).

2. The aviation high-speed oil pump circulation structure preventing foreign matter from being stuck according to claim 1, characterized in that: The power conversion mechanism (6) includes a drive shaft (61), which is fixedly connected to the outside of the drive end of the pump body (1), and an inwardly facing toothed ring is provided on the inner bottom side of the drive shaft (61).

3. The aviation high-speed oil pump circulation structure preventing foreign matter from being stuck according to claim 2, characterized in that: The bearing (51) is externally fixedly connected to the top of the pump body (1), and the shoulder (53) is externally slidably connected to the inside of the pump body (1).

4. The aviation high-speed oil pump circulation structure preventing foreign matter from being stuck according to claim 3, characterized in that: The connecting assembly (54) includes a connecting plate (541), which is fixedly connected to the outside of the motor (2). Multiple nuts (542) are threaded around the inside of the connecting plate (541), and the bottom outer side of the nuts (542) is threaded to the top of the pump body (1).

5. The aviation high-speed oil pump circulation structure preventing foreign matter from being stuck according to claim 4, characterized in that: The inner bottom of the drive shaft (61) is slidably connected to a limiting shaft (63), and a gear (62) is rotatably connected to the outside of the limiting shaft (63). The external teeth of the gear (62) and the internal gear ring of the drive shaft (61) are meshed with each other.

6. The aviation high-speed oil pump circulation structure preventing foreign matter from being stuck according to claim 5, characterized in that: The bottom of the limiting shaft (63) is fixedly connected to a base (65), the bottom of the base (65) is fixedly connected to a base plate (67), a sealing ring (66) is sleeved on the outside of the base (65), the outside of the sealing ring (66) is slidably connected to the bottom of the pump body (1), and an arc plate (64) is fixedly connected to the top of the base (65).

Images