Universal adjustable nozzle structure

Abstract

According to the universal adjustable nozzle structure fixed to the shell, the shell comprises a lubricating oil connector, the structure comprises a base, a mounting base and a nozzle, the base comprises a base body and a connecting part, the connecting part is used for being connected with the shell, the base body comprises a hollow cavity, and the hollow cavity is communicated with the lubricating oil connector; the mounting seat is arranged in the hollow cavity in a replaceable manner and comprises an oil guide hole and a plurality of mounting holes, and the oil guide hole is communicated with the hollow cavity; and the nozzles are connected with the mounting holes in a replaceable manner. The universal adjustable nozzle structure can adapt to different cooling scenes and has good universality.

Description

Technical Field

[0001] The utility model relates to the field of aviation engines, in particular to the field of cooling nozzle structures. Background Art

[0002] The transmission system is an important part of an aircraft engine. When the transmission system is working, the high-speed rotating gears, bearings, splines and other rotor parts will generate a lot of heat due to friction and need to be cooled. At present, the mainstream lubrication and cooling structure used in the transmission system of aircraft engines is the nozzle structure. The lubricating oil enters the nozzle from the lubricating oil inlet and then sprays the lubricating oil to the designated position through the spray hole, thereby achieving lubrication and cooling of the designated position. However, there are a large number of rotor parts in the transmission system, the spatial distribution positions are complex, and the lubricating oil requirements are often different. Therefore, there are many nozzle structures with different injection parameters, which cannot be universal. Utility Model Content

[0003] One purpose of the utility model is to provide a universal adjustable nozzle structure that can adapt to different cooling scenarios and has better versatility.

[0004] In order to achieve the above-mentioned purpose, a universal adjustable nozzle structure is fixed on a shell, and the shell includes a lubricating oil interface. The structure includes a base, a mounting seat and a nozzle. The base includes a seat body and a connecting portion, and the connecting portion is used to connect to the shell. The seat body includes a hollow cavity, and the hollow cavity is connected to the lubricating oil interface; the mounting seat is replaceably arranged in the hollow cavity, including an oil guide hole and a plurality of mounting holes, and the oil guide hole is connected to the hollow cavity; the nozzle is replaceably connected to each of the mounting holes.

[0005] In one or more embodiments, the nozzle includes a first axial portion and a second axial portion, the second axial portion has a circumferential limiting pattern, the mounting hole includes a matching limiting pattern that matches the circumferential limiting pattern, the second axial portion has a clearance fit with the mounting hole, and the first axial portion has an interference fit with the mounting hole.

[0006] In one or more embodiments, the circumferential limiting pattern and the mating limiting pattern include twenty-four-corner milled flat lace.

[0007] In one or more embodiments, the first axial portion includes an annular groove containing a sealant.

[0008] In one or more embodiments, the seat body and the lubricating oil interface hole are axially connected, and the outer periphery of the seat body is provided with one or more first annular grooves for accommodating a first rubber ring to seal the lubricating oil interface and the seat body.

[0009] In one or more embodiments, one or more second annular grooves are provided on the outer periphery of the mounting seat for accommodating a second rubber ring to seal the mounting seat and the base.

[0010] In one or more embodiments, a circumferential limiting portion is provided on the outside of the mounting seat, and an inner wall of the base for forming the hollow cavity is provided with a matching limiting portion that matches with the circumferential limiting portion.

[0011] In one or more embodiments, the nozzle structure further includes a plug connected to the mounting hole.

[0012] In one or more embodiments, the nozzle structure includes a series of nozzles with different nozzle hole diameters and axial directions, and each nozzle is replaceably connected to the mounting hole.

[0013] In one or more embodiments, a stop shoulder is formed at the upper end of the circumferential limiting portion, and the seat body is provided with a stop ring groove, and the stop ring groove and the stop shoulder jointly accommodate a stop ring.

[0014] The above-mentioned universal adjustable nozzle structure is fine-tuned on the basis of the traditional nozzle structure. There is no need to modify the existing engine structure. By designing the nozzle and the mounting seat as a replaceable structure, it can meet different lubricating cooling requirements. The structure is simple and easy to assemble and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which:

[0016] Figure 1 It is a schematic diagram of the traditional nozzle structure;

[0017] Figure 2 is a schematic diagram of a universal adjustable nozzle structure;

[0018] Figure 3 It is a cross-sectional view of a universal adjustable nozzle structure;

[0019] Figure 4 is a schematic diagram of the nozzle;

[0020] Figure 5 is a schematic diagram of the base;

[0021] Figure 6 is a schematic diagram of an adjustable mount. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with specific embodiments and drawings. More details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the protection scope of the present invention should not be limited by the content of this specific embodiment.

[0023] It should be noted that these and other subsequent drawings are only examples and are not drawn in proportion, and should not be used as a limitation on the actual scope of protection required by the present utility model.

[0024] The transmission system is an important part of the aircraft engine. During the operation of the engine, the transmission system provides forward thrust to the aircraft, and also outputs power through the transmission system to drive various electrical equipment carried on the aircraft; during the starting phase, the starter in the accessory outputs power to the engine in the reverse direction through the transmission system, drives the engine, and then drives the aircraft to take off. The transmission system includes rotor parts such as gears, bearings and splines, which will generate a lot of heat due to friction when in operation. Therefore, a safe and reliable lubrication and cooling mechanism in the transmission system is an important guarantee for the safe operation of the engine and aircraft.

[0025] Figure 1 A common traditional nozzle structure installed on the casing is shown, one end of which is connected to the inlet of the lubricating oil pipeline through an orifice 110, and the other end is processed with one or more nozzles 130, and the lubricating oil is sprayed to a specified position through the spray hole. The spray hole has different spray parameters such as aperture and aspect ratio designed based on the oil supply pressure, spray position and lubricating oil demand. However, there are a large number of rotor parts in the transmission system, the spatial distribution positions are complex, and the lubricating oil demand is often different. Therefore, there are a variety of nozzle structures with different spray parameters, which are not universal, which not only increases the processing and manufacturing cost and the difficulty of maintenance, but also reduces the reliability of the product.

[0026] In order to solve the above problems, the utility model provides a universal adjustable nozzle structure, which has good versatility and can meet the different lubrication and cooling requirements of various rotor parts of the transmission system under different operating conditions of the engine.

[0027] Universal adjustable nozzle structure reference Figures 2 to 6 As shown, it is fixed on a housing (not shown) such as a transmission system casing housing, and the housing provides an oil interface, which is connected to an oil pipeline for outputting oil. The universal adjustable nozzle structure includes a base 1, a mounting seat 2 and a nozzle 3.

[0028] Figure 5The structure of the base is shown, and the base 1 includes a base body 11 and a connecting portion 13. The base body 11 includes a hollow cavity 12. The connecting portion 13 is located on the extension of the base body 11, and is used to connect with the casing shell to fix the nozzle structure as a whole to the shell. For example, a fastening connection is achieved by passing a connecting member such as a bolt through the connecting hole thereon. The hollow cavity 12 on the base body 11 is in fluid communication with the lubricating oil interface. The base body 11 and the lubricating oil structure can be connected in a hole-shaft manner. The lubricating oil interface provides a hole, and the base body 11 extends into the hole as an axis to achieve connection in the form of a hole-shaft. In order to ensure the sealing of the connection, one or more first annular grooves 14 are provided on the outer periphery of the base body 11 for accommodating a first rubber ring 15 to seal the lubricating oil interface and the base. The lubricating oil enters the hollow cavity 12 from the lubricating oil interface of the casing shell through the lubricating oil inlet, as shown in FIG. Figure 3 shown.

[0029] Figure 6 The schematic diagram of the mounting seat 2 is shown. The mounting seat 2 is replaceably arranged in the hollow cavity 12, including an oil guide hole 21 and a plurality of mounting holes 22. The oil guide hole 21 is connected to the hollow cavity 12 for conveying lubricating oil. The mounting hole 22 is used to fix the nozzle 3. The mounting hole 22 preferably has different axial directions, such as Figure 3 As shown, it can be along the axis direction of the oil guide hole 21, or perpendicular to the axis direction of the oil guide hole 21 or form an acute angle with the axis direction of the oil guide hole 21 to change the spray angle of the nozzle 3. In some embodiments, the outer periphery of the mounting seat 2 is provided with one or more second annular grooves 26 for accommodating a second rubber ring 27 to seal the mounting seat 2 and the base 1.

[0030] The outside of the mounting seat 2 is also provided with a circumferential limiting portion 25, and the inner wall of the hollow cavity 12 formed by the base 1 is provided with a matching limiting portion 16 that matches with the circumferential limiting portion 25. Figure 5 and Figure 6 The circumferential limiting portion 25 and the matching limiting portion 16 can be twenty-four-corner milled flat laces that match each other to limit the mounting seat 2 and the base 1 in the circumferential direction.

[0031] In some embodiments, a retaining ring groove 29 is further provided on one side of the seat body 11 close to the opening of the hollow cavity 12, and a retaining shoulder 252 is formed at the upper end of the circumferential limit portion 25. The retaining ring groove 29 and the retaining shoulder 252 together accommodate a retaining ring 28, so that the base 1 and the mounting seat 2 are axially aligned, that is, along the Figure 3 Limits in the up and down directions.

[0032] Figure 4The structure of the nozzle 3 is shown. The nozzle 3 includes a spray hole 30 connected to the oil guide hole 21 and is replaceably connected to each mounting hole 22. The universal adjustable nozzle structure includes a series of nozzles with different spray hole diameters and axial directions. Each nozzle can be replaceably connected to the mounting hole 22. When in use, a suitable nozzle is selected according to the cooling requirements and installed in the mounting hole 22. The nozzle 3 is processed into a series of products of different groups based on the spray hole diameter and the angle between the spray hole and the nozzle axis, and is used as needed when selected. In addition, in some embodiments, the nozzle structure also includes a plug (not shown in the figure) connected to the mounting hole, which is used to block the mounting hole 22 of the nozzle.

[0033] In some embodiments, the exterior of the nozzle 3 includes a first axial portion 31 and a second axial portion 32 , the second axial portion 32 has a circumferential limiting pattern 33 , and the mounting hole 22 of the mounting seat 2 includes a matching limiting pattern 225 matching the circumferential limiting pattern 33 .

[0034] The second axial portion 32 is clearance-fitted with the mounting hole 22 , so as to facilitate the circumferential position adjustment of the nozzle 3 ; the first axial portion 31 is interference-fitted with the mounting hole 22 , so as to realize the axial limitation of the nozzle 3 relative to the adjustable mounting seat 2 .

[0035] For example, the circumferential limiting pattern 33 and the matching limiting pattern 225 both include 24-corner milled flat edges, and a pair of 24-corner milled flat edges cooperate to limit the nozzle 3 circumferentially on the mounting seat 2. The circumferential position of the nozzle 3 fixed on the adjustable mounting seat 2 relative to the base 1 can also be adjusted by adjusting the relative position of the adjustable mounting seat 2 and the base 1.

[0036] In some embodiments, the first axial portion 31 includes an annular groove 310, which contains sealant. When the nozzle 3 is assembled with the mounting seat 2, the sealant is applied to the annular groove, and the mounting hole 22 of the mounting seat 2 and the outer edge of the adjustable nozzle 3 are sealed by the combined action of interference fit and sealant.

[0037] When selecting a universal adjustable nozzle, first determine the required number of nozzles and the installation position on the mounting seat. For mounting holes that are not used, use plugs to block them. Then select nozzles 3 with different parameters corresponding to the cooling requirements, and then determine the relative position of the 24-corner milled flat lace between nozzle 3 and mounting seat 2 based on the lubricating oil injection position, and determine the relative position of the 24-corner milled flat lace between mounting seat 2 and base 1, and then fix the circumferential position.

[0038] All components of the universal adjustable nozzle structure are universal parts, and the existing engine transmission mechanism is rarely modified. It is only necessary to select different groups of nozzles according to needs, and then adjust the relative position of the milled flat lace to achieve the lubricating oil injection function of the specified flow rate at the specified position. The overall structure is simple and easy to assemble. The device has a single configuration, convenient parts processing, good economy and high reliability.

[0039] The present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or multiple times in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0040] Although the utility model is disclosed as above with preferred embodiments, it is not intended to limit the utility model. Any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the utility model. Therefore, any modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical solution of the utility model shall fall within the protection scope defined by the claims of the utility model.

Claims

1. A universal adjustable nozzle structure, fixed on a housing, the housing including an oil interface, characterized in that: The structure includes: A base, comprising a base body and a connecting portion, wherein the connecting portion is used to be connected to the housing, the base body comprises a hollow cavity, and the hollow cavity is communicated with the lubricating oil interface; A mounting seat is replaceably disposed in the hollow cavity, comprising an oil guide hole and a plurality of mounting holes, wherein the oil guide hole is communicated with the hollow cavity; and The nozzle is replaceably connected to each of the mounting holes.

2. The universal adjustable nozzle structure according to claim 1, characterized in that: The nozzle includes a first axial portion and a second axial portion, the second axial portion has a circumferential limiting pattern, the mounting hole includes a matching limiting pattern that matches the circumferential limiting pattern, the second axial portion is clearance-fitted with the mounting hole, and the first axial portion is interference-fitted with the mounting hole.

3. The universal adjustable nozzle structure according to claim 2, characterized in that: The circumferential limiting lines and the matching limiting lines include twenty-four-corner milled flat laces.

4. The universal adjustable nozzle structure according to claim 2, characterized in that: The first axial portion includes an annular groove containing a sealant.

5. The universal adjustable nozzle structure according to claim 1, characterized in that: The seat body is axially connected to the lubricating oil interface hole, and one or more first annular grooves are arranged on the outer periphery of the seat body for accommodating a first rubber ring to seal the lubricating oil interface and the seat body.

6. The universal adjustable nozzle structure according to claim 1, characterized in that: One or more second annular grooves are provided on the outer periphery of the mounting seat for accommodating a second rubber ring to seal the mounting seat and the base.

7. The universal adjustable nozzle structure according to claim 1, characterized in that: A circumferential limiting portion is disposed on the outside of the mounting seat, and a matching limiting portion matching with the circumferential limiting portion is disposed on the inner wall of the base for forming the hollow cavity.

8. The universal adjustable nozzle structure according to claim 1, characterized in that: The nozzle structure also includes a plug connected to the mounting hole.

9. The universal adjustable nozzle structure according to claim 1, characterized in that: The nozzle structure comprises a series of nozzles with different nozzle hole diameters and axial directions, and each nozzle is replaceably connected to the mounting hole.

10. The universal adjustable nozzle structure according to claim 7, characterized in that: The upper end of the circumferential limiting portion forms a retaining shoulder, and the seat body is provided with a retaining ring groove, and the retaining ring groove and the retaining shoulder jointly accommodate a retaining ring.

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