An ultra-long stroke telescopic oil receiving device

Abstract

The utility model discloses a telescopic oil receiving device of super long stroke, including oil receiving plug, telescopic cylinder and fixed cylinder, the inside coaxial sliding of fixed cylinder is provided with telescopic cylinder, and one end of telescopic cylinder extends fixed cylinder and is connected with oil receiving plug, the front end of fixed cylinder inside is provided with front support seat, and the sidewall of telescopic cylinder is provided with the waist type groove corresponding front support seat, and the rear end of fixed cylinder is connected with hydraulic power assembly through rear support seat, the middle part of fixed cylinder is provided with the lead screw, the lead screw is rotatory connection with front support seat, rear support seat respectively, and the drive end of hydraulic power assembly is connected with one end of lead screw, the lead screw is connected with the guide sliding block through lead screw nut, and the guide sliding block is connected with the other end of telescopic cylinder, the oil receiving device of the utility model adopts the technical configuration of built -in drive linear telescopic, makes its overall structure compact, and motion mechanism and force transmission path are simple, can effectively reduce the installation space, has better practicality.

Description

Technical Field

[0001] This utility model belongs to the technical field of aircraft refueling equipment, specifically relating to a telescopic refueling device with an ultra-long stroke. Background Technology

[0002] In-flight refueling technology is a key technology for combat aircraft to achieve large combat radius, long loiter time, rapid maneuverability, and large payload / cargo capacity. It is an important air logistics support force in modern warfare and plays an increasingly important role. The refueling device is a key link and important weapon system for realizing in-flight refueling technology for aircraft.

[0003] Currently, refueling receivers adapted to my country's aerial refueling system are divided into fixed and retractable types. Fixed refueling receivers are mainly installed externally on the aircraft and have no moving parts. This type of device is simple in structure, inexpensive, and easy to maintain. However, this structure will disrupt the aircraft's aerodynamic shape and affect its combat performance. At the same time, the fixed extended structure will compromise the aircraft's stealth performance. Retractable refueling receivers include moving parts and can be completely retracted into the aircraft when not in operation. They are deployed when refueling is required, thus enabling the aircraft to receive refueling in mid-air without compromising its aerodynamic shape and stealth performance.

[0004] Due to increasingly stringent requirements for the aerodynamic shape and stealth performance of modern military aircraft, refueling receivers are mostly retractable / retractable types to meet relevant specifications. Retractable / retractable refueling receivers mainly include rocker-arm and telescopic types. Rocker-arm refueling receivers have relatively more complex drive mechanisms and motion patterns, occupying more internal space; telescopic refueling receivers have simpler motion patterns, concise power transmission paths, and occupy less space. Short-stroke telescopic refueling receivers have small distances between the refueling and receiving aircraft, resulting in significant wake turbulence impact. Long-stroke telescopic refueling receivers can effectively control the distance between the refueling and receiving aircraft while simultaneously refueling, avoiding significant impact from the tanker's wake turbulence on the receiving aircraft and improving the success rate of in-flight refueling. Utility Model Content

[0005] The purpose of this invention is to provide a telescopic oil receiving device with an ultra-long stroke, which aims to drive the telescopic cylinder through a ball screw pair, thereby effectively reducing the installation space.

[0006] This utility model is mainly achieved through the following technical solutions: An ultra-long stroke telescopic oil receiving device includes an oil receiving plug, a telescopic cylinder, and a fixed cylinder. The telescopic cylinder is slidably mounted coaxially inside the fixed cylinder. One end of the telescopic cylinder extends out of the fixed cylinder and connects to the oil receiving plug. A front support seat is provided at the front end of the fixed cylinder, and a waist-shaped groove is provided on the side wall of the telescopic cylinder corresponding to the front support seat. The rear end of the fixed cylinder is connected to a hydraulic power component through a rear support seat. A lead screw is provided in the middle of the fixed cylinder. The lead screw is rotatably connected to both the front and rear support seats, and the drive end of the hydraulic power component is connected to one end of the lead screw. A guide slider is connected to the lead screw through a lead screw nut, and the guide slider is connected to the other end of the telescopic cylinder.

[0007] To better realize this utility model, the front end of the lead screw is rotatably connected to the front support seat through a rolling bearing, and the rear end of the lead screw is rotatably connected to the rear support seat through a thrust bearing.

[0008] To better realize this utility model, guide sliders are further provided on both sides of the lead screw nut.

[0009] To better realize this utility model, further, guide ring I and guide ring II are respectively provided between the front end and the rear end of the fixed cylinder and the telescopic cylinder. The guide ring I and guide ring II are respectively made of conductive non-metallic material and are used to guide the movement of the telescopic cylinder and the fixed cylinder, transfer load and conduct static electricity.

[0010] To better realize this utility model, a dustproof ring is further provided between the front ends of the fixed cylinder and the telescopic cylinder, and a sliding seal I and a sliding seal II are sequentially provided between the rear ends of the fixed cylinder and the telescopic cylinder.

[0011] To better realize this utility model, a position signal device is further provided on the outer side of the fixed cylinder for detecting the movement position of the telescopic cylinder.

[0012] To better realize this utility model, the oil receiving plug and the telescopic cylinder are further connected by threads.

[0013] The beneficial effects of this utility model are as follows: (1) The refueling receiver of this utility model adopts a built-in drive and linear telescopic technical configuration, which makes its overall structure compact, the motion mechanism and force transmission path simple, and can effectively reduce the installation space. When working, the refueling receiver passes through a small area of ​​the aircraft skin, generating less noise. When not refueling in the air, the refueling receiver is completely retracted, which can ensure the aerodynamic shape and stealth performance of the aircraft. This utility model can be applied as an ultra-long-stroke telescopic refueling receiver installed on large refueling aircraft. Secondly, the refueling receiver of this utility model has an ultra-long telescopic stroke, which can ensure that when the refueling plug reaches the designated refueling docking position, the distance between the refueling aircraft and the tanker aircraft is large, reducing the influence of the tail flow field of the tanker aircraft on the refueling aircraft, improving the success rate of in-flight refueling, and has good practicality.

[0014] (2) When this utility model is working, it is driven by a hydraulic power component, which drives the telescopic cylinder to move axially along the fixed cylinder through a ball screw pair. When it is fully extended, the aerial refueling is completed. After the refueling mission is completed, the telescopic cylinder is retracted into the aircraft body. The drive-transmission mechanism of the refueling device of this utility model is simple, the force transmission route is concise, the layout is simple, and the installation space is small. When not refueling, it ensures the aerodynamic shape and stealth performance of the aircraft. When performing the refueling mission, the area through which the refueling device passes through the aircraft skin is small, and the noise generated is small. At the same time, due to the long extension stroke, it can ensure that the distance between the receiving aircraft and the tanker aircraft is increased when the refueling plug reaches the designated docking point, reducing the aerodynamic interference of the tail flow field of the tanker aircraft on the receiving aircraft, increasing the success rate of aerial refueling missions, and has good practicality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a telescopic oil receiving device with an ultra-long stroke according to this utility model; Figure 2 for Figure 1 AA section view in the image.

[0016] The components are: 1-oil receiving plug, 2-telescopic cylinder, 3-fixed cylinder, 4-position signal device, 5-fuel adapter, 6-rear support seat, 7-hydraulic power assembly, 8-rolling bearing, 9-front support seat, 10-guide cylinder, 11-guide slider, 12-thrust bearing, 13-dust seal, 14-guide ring I, 15-sliding seal I, 16-sliding seal II, 17-guide ring II. Detailed Implementation

[0017] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", and "outer" used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only used to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] Furthermore, the use of terms such as "horizontal" or "vertical" in the description of this utility model does not imply that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Example 1: An ultra-long stroke telescopic oil receiving device includes an oil receiving plug 1, a telescopic cylinder 2, and a fixed cylinder 3. The telescopic cylinder 2 is coaxially slidably disposed inside the fixed cylinder 3. One end of the telescopic cylinder 2 extends out of the fixed cylinder 3 and is connected to the oil receiving plug 1. A front support seat 9 is provided at the front end inside the fixed cylinder 3, and a waist-shaped groove is provided on the side wall of the telescopic cylinder 2 corresponding to the front support seat 9. The rear end of the fixed cylinder 3 is connected to a hydraulic power assembly 7 through a rear support seat 6. A lead screw is provided in the middle of the fixed cylinder 3. The lead screw is rotatably connected to the front support seat 9 and the rear support seat 6 respectively, and the driving end of the hydraulic power assembly 7 is connected to one end of the lead screw. The lead screw is connected to a guide slider 11 through a lead screw nut, and the guide slider 11 is connected to the other end of the telescopic cylinder 2.

[0021] This invention is operated by a hydraulic power unit 7, which, via a ball screw drive, propels the telescopic cylinder 2 to move axially along the fixed cylinder 3. When fully extended, in-flight refueling is completed. After the refueling mission, the telescopic cylinder 2 retracts into the aircraft. The drive-transmission mechanism of this refueling device is simple, with a concise power transmission path, simple layout, and small installation space. When not refueling, it ensures the aircraft's aerodynamic shape and stealth performance. During refueling missions, the refueling device passes through a small area of ​​the aircraft skin, generating less noise. Furthermore, due to its long extension stroke, it increases the distance between the receiving aircraft and the tanker when the refueling plug 1 reaches the designated docking point, reducing aerodynamic interference from the tanker's tail flow field on the receiving aircraft and increasing the success rate of in-flight refueling missions. It has good practicality.

[0022] Example 2: A telescopic oil receiving device with an ultra-long stroke, such as Figure 1 and Figure 2 As shown, it includes an oil receiving plug 1, a telescopic cylinder 2, a fixed cylinder 3, a position signal device 4, a fuel connector 5, a hydraulic power assembly 7, a ball screw pair, and a guide slider 11.

[0023] The refueling connector 1 connects to the refueling cone sleeve of the aerial refueling aircraft. One end of the telescopic cylinder 2 is connected to the refueling connector 1, and the other end is connected to the guide slider 11. The telescopic cylinder 2 is coaxial with the fixed cylinder 3 and can slide relative to it. The ball screw pair's screw nut is connected to the guide slider 11, and the rear end of the screw is connected to the hydraulic power assembly 7 via a key-keyway fit. The ball screw pair is used to convert the rotational motion of the hydraulic power assembly 7 into the linear motion of the telescopic cylinder 2. Driven by the hydraulic power assembly 7 and transmitted by the ball screw pair, the telescopic cylinder 2 slides along the fixed cylinder 3, and drives the refueling connector 1 to move together.

[0024] Preferably, the hydraulic power assembly 7 includes a hydraulic motor and a hydraulic valve group, used for power output and hydraulic circuit control and monitoring, respectively. The hydraulic power assembly 7 and the ball screw pair are connected via a key-keyway joint for power transmission. The valve group in the hydraulic power assembly 7 controls the speed and direction of movement of the ball screw pair and the telescopic cylinder 2. The position signal device 4 monitors the position of the telescopic cylinder 2 and sends a signal. The fuel adapter 5 is connected to the fuel line of the receiving machine. The position signal device 4 is existing technology and will not be described further.

[0025] Preferably, the ball screw assembly includes a screw and a ball nut. The rear end of the screw is connected to the hydraulic power assembly 7, and the ball nut is connected to the guide slider 11. The guide slider 11 is also connected to the telescopic cylinder 2. When the screw rotates, the ball nut will move linearly. The motion command is transmitted to the telescopic cylinder 2 through the guide slider 11, which in turn drives the oil receiving plug 1 to move together. The motion form, force transmission path, and device structure are simple.

[0026] Preferably, the rear support seat 6 is connected to both the hydraulic power assembly 7 and the fixed cylinder 3, and a sealing ring is provided between the rear support seat 6 and the fixed cylinder 3. Preferably, rolling bearings 8 and thrust bearings 12 are respectively provided at the front and rear of the ball screw assembly, which can transmit loads and increase the stability of the screw. The rolling bearings 8 and thrust bearings 12 are connected to the ball screw assembly and transmit loads through the front support seat 9 and the rear support seat 6, respectively. The two sides of the front support seat 9 pass through the telescopic cylinder 2 and connect to the fixed cylinder 3, and the two sides of the telescopic cylinder 2 are respectively provided with waist-shaped grooves to avoid motion interference.

[0027] Preferably, the guide cylinder 10 is located outside the ball screw pair. The guide cylinder 10 has a through groove corresponding to the guide slider 11 and forms a sliding pair with the guide slider 11, which restricts the rotational freedom of the screw and ball nut of the ball screw pair, thereby preventing relative rotation between the telescopic cylinder 2 and the fixed cylinder 3. The guide slider 11 passes through the through groove and is connected to the telescopic cylinder 2.

[0028] Preferably, the position signal device 4 is a magnetic induction proximity switch, which can monitor whether the telescopic cylinder 2 has moved to a designated position by identifying the target on the telescopic cylinder 2.

[0029] Preferably, the oil receiving plug 1 and the telescopic cylinder 2 are connected by threads and a stop washer and a sealing ring are provided.

[0030] Preferably, a dustproof ring 13, a guide ring I 14, a sliding seal I 15, a sliding seal II 16, and a guide ring II 17 are provided between the telescopic cylinder 2 and the fixed cylinder 3. Preferably, a dustproof ring 13 is provided at the front end of the fixed cylinder 3 to prevent external impurities from entering the fuel passage. Preferably, the guide ring I 14 and guide ring II 17 are made of conductive non-metallic materials, which can realize motion guidance, load transmission, and electrostatic conduction between the telescopic cylinder 2 and the fixed cylinder 3. Preferably, the sliding seal I 15 and sliding seal II 16 are a combination structure of plastic and rubber to prevent fuel leakage from between the telescopic cylinder 2 and the fixed cylinder 3.

[0031] Preferably, the relative sliding distance between the telescopic cylinder 2 and the fixed cylinder 3 is 2500mm.

[0032] When performing the refueling task, the onboard hydraulic power source supplies hydraulic power assembly 7. The valve group in hydraulic power assembly 7 controls the flow direction and speed of the hydraulic circuit, and adjusts the speed and direction of rotation of the hydraulic motor in hydraulic power assembly 7. Under the drive of hydraulic power assembly 7, the ball screw pair rotates synchronously and is converted into linear motion. Through the transmission of the ball screw pair, the guide slider 11 is driven and the telescopic cylinder 2 and the refueling plug 1 extend axially along the fixed cylinder 3. When they are extended into place, the refueling plug 1 connects with the refueling cone sleeve, and the fuel of the refueling machine is transported to the refueling machine's fuel tank through the refueling device.

[0033] After the refueling mission is completed, the valve group in the hydraulic power assembly 7 changes the flow direction of the hydraulic oil circuit, thereby changing the rotation direction of the hydraulic motor and ball screw pair in the hydraulic power assembly 7. Through the transmission of the ball screw pair, the guide slider 11 is driven, which in turn drives the telescopic cylinder 2 and the refueling plug 1 to retract axially along the fixed cylinder 3. Because the through groove of the guide cylinder 10 and the guide slider 11 form a key-keyway fit to constrain the rotational freedom of the ball screw pair 10, relative rotation between the telescopic cylinder 2 and the fixed cylinder 3 is prevented, and only axial displacement can occur. Because the refueling device adopts a built-in drive and linear telescopic technical configuration, its overall structure is compact, the motion mechanism and force transmission path are simple, which can effectively reduce the installation space. When working, the area through which the refueling device passes through the aircraft skin is small, resulting in low noise. When not refueling in the air, the refueling device is completely retracted, which can ensure the aerodynamic shape and stealth performance of the aircraft. Because the refueling receiver has an ultra-long telescopic stroke, it can ensure that when the refueling plug reaches the designated refueling docking position, the distance between the receiving aircraft and the refueling aircraft is large, which reduces the impact of the tail flow field of the refueling aircraft on the receiving aircraft and improves the success rate of aerial refueling.

[0034] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A telescopic oil receiving device with an ultra-long stroke, characterized in that, The device includes an oil receiving plug (1), a telescopic cylinder (2), and a fixed cylinder (3). The telescopic cylinder (2) is slidably mounted coaxially inside the fixed cylinder (3). One end of the telescopic cylinder (2) extends out of the fixed cylinder (3) and is connected to the oil receiving plug (1). A front support seat (9) is provided at the front end of the fixed cylinder (3), and a waist-shaped groove is provided on the side wall of the telescopic cylinder (2) corresponding to the front support seat (9). The rear end of the fixed cylinder (3) is connected to the hydraulic power assembly (7) through a rear support seat (6). A lead screw is provided in the middle of the fixed cylinder (3). The lead screw is rotatably connected to the front support seat (9) and the rear support seat (6) respectively, and the driving end of the hydraulic power assembly (7) is connected to one end of the lead screw. The lead screw is connected to a guide slider (11) through a lead screw nut. The guide slider (11) is connected to the other end of the telescopic cylinder (2).

2. The telescopic oil receiving device with an ultra-long stroke according to claim 1, characterized in that, The front end of the lead screw is rotatably connected to the front support seat (9) via a rolling bearing (8), and the rear end of the lead screw is rotatably connected to the rear support seat (6) via a thrust bearing (12).

3. The telescopic oil receiving device with an ultra-long stroke according to claim 1, characterized in that, Guide sliders (11) are provided on both sides of the lead screw nut.

4. A telescopic oil receiving device with an ultra-long stroke according to any one of claims 1-3, characterized in that, Guide ring I (14) and guide ring II (17) are respectively provided between the front end and the rear end of the fixed cylinder (3) and the telescopic cylinder (2). The guide ring I (14) and guide ring II (17) are respectively made of conductive non-metallic material and are used to guide the movement, transfer load and conduct static electricity between the telescopic cylinder (2) and the fixed cylinder (3).

5. A telescopic oil receiving device with an ultra-long stroke according to claim 4, characterized in that, A dustproof ring (13) is provided between the front end of the fixed cylinder (3) and the telescopic cylinder (2), and a sliding seal I (15) and a sliding seal II (16) are provided between the rear end of the fixed cylinder (3) and the telescopic cylinder (2) in sequence.

6. The telescopic oil receiving device with an ultra-long stroke according to claim 1, characterized in that, A position signal device (4) is provided on the outside of the fixed cylinder (3) to detect the movement position of the telescopic cylinder (2).

7. The telescopic oil receiving device with an ultra-long stroke according to claim 1, characterized in that, The oil receiving plug (1) and the telescopic cylinder (2) are threaded together.

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