阅读说明：本技术 用于集成式驱动发电机的机油滤清器壳体的罩盖 (Cover for an oil filter housing of an integrated drive generator ) 是由 G.C.小莱默斯 D.R.霍赫斯特特勒 于 2019-12-13 设计创作，主要内容包括：公开了一种用于机油滤清器壳体的罩盖,所述罩盖包括细长主体,所述细长主体限定上端部和下端部,并且具有延伸穿过所述细长主体的中心轴线,所述中心轴线描绘所述主体的轴向长度,其中轴向孔穿过所述罩盖的所述主体从所述主体的所述下端部延伸到在所述主体的所述上端部中的内端壁以用于容纳位于所述壳体内的机油滤清器的轴向部分,所述主体的所述轴向孔的轴向长度为所述主体的所述轴向长度的约90％至约94％。(A cover for an oil filter housing is disclosed, the cover comprising an elongated body defining an upper end and a lower end and having a central axis extending through the elongated body, the central axis depicting an axial length of the body, wherein an axial bore extends through the body of the cover from the lower end of the body to an inner end wall in the upper end of the body for receiving an axial portion of an oil filter located within the housing, the axial bore of the body having an axial length of about 90% to about 94% of the axial length of the body.)

1. A cover for an oil filter housing, the cover comprising:

an elongated body defining an upper end and a lower end and having a central axis extending therethrough, the central axis depicting an axial length of the body, wherein an axial bore extends through the body of the cap from the lower end of the body to an inner end wall in the upper end of the body for receiving an axial end of an oil filter located within the housing, the axial bore of the body having an axial length greater than 85% of the axial length of the body.

2. The cover of claim 1 wherein the axial length of the bore is about 90% to about 94% of the axial length of the body.

3. The cover of claim 1 wherein the axial length of the bore is about 1.56 inches to about 1.59 inches.

4. The closure of claim 1 in which the axial length of the body is from about 1.69 inches to about 1.72 inches.

5. The closure of claim 1 in which the axial bore has a diameter of about 1.81 inches.

6. The cover of claim 1 wherein said body is formed from 2024 aluminum alloy.

7. The closure of claim 1 in which said upper end of said body has a hexagonal engagement surface formed thereon.

8. A cover for an oil filter housing, the cover comprising:

an elongated body defining an upper end and a lower end and having a central axis extending therethrough, the central axis depicting an axial length of the body, wherein an axial bore extends through the body of the cap from the lower end of the body to an inner end wall in the upper end of the body for receiving an axial portion of an oil filter located within the housing, the axial bore of the body having an axial length of about 90% to about 94% of the axial length of the body.

9. The cover of claim 8 wherein the axial length of the bore is about 1.56 inches to about 1.59 inches.

10. The closure of claim 8 in which the axial length of the body is from about 1.69 inches to about 1.72 inches.

11. The closure of claim 8 in which the axial bore is about 1.81 inches in diameter.

12. The cover of claim 8 wherein said body is formed from 2024 aluminum alloy.

13. The closure of claim 8 in which said upper end of said body has a hexagonal engagement surface formed thereon.

14. A cover for an oil filter housing, the cover comprising:

an elongated body formed of an aluminum alloy and defining an upper end and a lower end and having a central axis extending therethrough, wherein an axial bore extends through the body of the cap from the lower end of the body to an inner end wall in the upper end of the body for receiving an axial portion of an oil filter located within the housing, the body having an axial length of about 1.69 inches to about 1.72 inches, and the axial bore having an axial length of about 1.56 inches to about 1.59 inches and a diameter of about 1.81 inches.

15. The cover of claim 14 wherein said body is formed from 2024 aluminum alloy.

1. Field of the invention

The present invention relates to an oil filter cover and, more particularly, to a removable cover for an oil filter housing coupled to an Integrated Drive Generator (IDG) of a gas turbine engine.

2. Background of the invention

Aircraft currently rely on electrical, pneumatic and hydraulic systems for secondary power generation. Typical electrical systems in aircraft utilize IDGs coupled to gas turbine engines to provide fixed frequency electrical power to power distribution systems and various loads.

An exemplary IDG includes a generator, a hydraulic unit, and a differential assembly disposed in a common housing. The differential assembly is coupled to the gas turbine engine by way of an input shaft. The rotational speed of the input shaft varies during operation of the gas turbine engine. The hydraulic unit cooperates with the differential assembly to provide a constant speed to the generator throughout the operating range of the engine.

IDG operates at high temperatures. Synthetic engine oils are used for cooling and lubrication in IDGs and as working fluids. In these systems, minute metal wear particles are formed during normal operation. These wear particles are carried by the oil into the oil circuit and must be removed to maintain the operating efficiency and useful life of the system.

Thus, the oil circuit includes an oil filter in a housing having an outer casing that facilitates installation, removal, and periodic replacement of the oil filter. The oil filter needs to be designed to optimize the dirt holding capacity and service life of the oil filter. Typically, this is achieved by increasing the amount of filter media within a fixed size of the filter cartridge, as the size of the housing supporting the filter cartridge cannot be changed due to space limitations, especially in the case of IDGs coupled to gas turbine engines on board aircraft.

However, as the amount of filter media within the cartridge decreases, the pressure drop across the filter cartridge increases, thereby affecting the efficiency of the system. Therefore, it is beneficial to maximize the amount of filter media in an oil filter without increasing the pressure drop in the filter cartridge. The present invention provides a solution by means of a uniquely configured cover for an oil filter housing designed to accommodate a filter cartridge, the cover having an axial length greater than the axial length of the filter housing it accommodates while remaining within space limitations that permit the cover and filter to be removed from the housing at any time for routine maintenance purposes.

Disclosure of Invention

The present invention relates to a novel and useful cover for an oil filter housing used with an Integrated Drive Generator (IDG) coupled to a gas turbine engine. The bonnet includes an elongated body defining an upper end and a lower end and having a central axis extending through the elongated body, the central axis depicting an axial length of the body. An axial bore extends through the body of the cover from the lower end of the body to an inner end wall in the upper end of the body for receiving an axial end of an oil filter located within the housing.

According to a preferred embodiment of the invention, the axial length of the axial bore of the body is greater than 85% of the axial length of the body. More preferably, the axial length of the bore is about 90% to about 94% of the axial length of the body. In an exemplary embodiment of the cap, the axial length of the bore is about 1.57 inches to about 1.58 inches and the axial length of the body is about 1.67 inches to about 1.70 inches.

Further, the axial bore has a diameter of about 1.81 inches, and the main body is formed of 2024 aluminum alloy, and the upper end of the main body has a hexagonal engagement surface formed thereon for mounting the cover on the housing and for removing the cover from the housing.

These and other features of the filter housing cover of the present invention will become more apparent to those skilled in the art from the following detailed description of the preferred embodiments, which is briefly described in connection with the accompanying drawings.

Drawings

So that those having ordinary skill in the art to which the subject invention pertains will readily understand how to make and use the subject invention without undue experimentation, preferred embodiments thereof will be described in detail below with reference to the drawings, wherein:

FIG. 1 is a diagrammatic view of an Integrated Drive Generator (IDG) coupled to a gas turbine engine and having an oil filter housing including a cover of the present invention;

FIG. 2 is a perspective view of the cover of the present invention and an elongated oil filter cartridge removed from the filter housing of the IDG;

FIG. 3 is a side view of a perspective view of the cover shown in FIGS. 1 and 2;

FIG. 4 is a top plan view of the cover;

FIG. 5 is a cross-sectional view of the cover taken along line 5-5 of FIG. 4;

FIG. 6 is a partial enlarged view of the inboard flange portion of the cover taken from FIG. 3; and

FIG. 7 is an enlarged partial cross-sectional view taken along line 7-7 of FIG. 1 illustrating an elongated oil filter within a housing enclosed by the cover of the present invention and showing the fluid flow path through the oil filter.

Detailed Description

Referring now to the drawings, in which like reference numbers identify similar structural features, there is illustrated in FIG. 1 an Integrated Drive Generator (IDG)10 coupled to a gas turbine engine 12 that utilizes the novel and useful cover 14 of the present invention. More specifically, as shown in fig. 2, the cover 14 is designed to receive an elongated, radially pleated oil filter cartridge 16 having an axial length greater than the axial length of the filter housing 18 it receives while remaining within spatial constraints that permit the cover 14 and oil filter cartridge 16 to be readily removed from the housing 18 of the IDG 10 for routine maintenance purposes.

Referring to fig. 3-6, the bonnet 14 includes an elongated body 20 defining a central longitudinal axis (L)_{Axial line}) And has an upper end 22, a lower end 24, and an inboard abutment flange 26 around the periphery of the body 20. The body 20 of the bonnet 14 is preferably formed of 2024 aluminum alloy or similar material.

Central longitudinal axis L of body 20_{Axial line}Depicting the axial length (L) of the body 20_{Main body}). More specifically, as shown in FIG. 5, the axial length L of the body 20 of the bonnet 14_{Main body}From about 1.69 inches to about 1.72 inches. As best seen in FIG. 4, the upper end 22 of the main body 20 of the bonnet 14 has six formed thereonA polygonal engagement surface 28 for mounting the cover 14 on the housing 18 and for removing the cover 14 from the housing 18 using a hand tool.

The lower end 24 of the body 20 of the cap 14 has a helical thread formation having a standard pitch for threadedly engaging the housing 18, as best seen in fig. 3. The inboard abutment flange 26 of the main body 20 of the closure 14 is best seen in fig. 6. Which is adapted and configured to abut an outer edge surface of the filter housing 18 of the IDG 10 when the cover 14 is threadably engaged to the housing 18, as best seen in fig. 7.

Referring to fig. 5, the body 20 of the bonnet 14 has an axial bore 30 extending through the body 20 from the lower end 24 to an inner end wall 32 in the upper end 22 to receive an axial end of the oil filter cartridge 16 located within the housing 14. The axial bore 30 of the body 20 has an axial length (L)_Hole(s)) And an inner diameter D_Hole(s). Axial length L of bore 30_Hole(s)Is about 1.57 inches to about 1.58 inches, and an inner diameter D of bore 30_Hole(s)About 1.81 inches.

According to a preferred embodiment of the invention, the axial length L of the bore 30 of the body 20_Hole(s)Greater than the axial length L of the body 20_{Main body}85% of the total. More preferably, the axial length L of the bore 30 of the body 20_Hole(s)Is the axial length L of the body 20_{Main body}From about 90% to about 94%. In summary, in an exemplary embodiment of the bonnet 14, the axial length L of the bore 30 of the body 20_Hole(s)Is about 1.56 inches to about 1.59 inches, and the axial length L of the body 20_{Main body}From about 1.69 inches to about 1.72 inches.

Referring now to fig. 7, when the oil filter 16 is installed in the housing 18 of the IDG 10, the end of the oil filter 16 advantageously fits within the axial bore 30 of the body 20 of the bonnet 14. Further, when the end of the oil filter 16 is positioned within the axial bore 30 of the body 20 of the bonnet 14, the oil filter extends within the bonnet 14 beyond the housing 18. This enables the axial length of the oil filter 16 to be greater than the axial length of the filter housing 18 in which it is housed. As a result, the dirt holding capacity and useful life of the oil filter 16 may be optimized while the cover 14 remains within spatial limits that permit the cover 14 and oil filter 16 to be removed from the housing 18 of the IDG 10 at any time for routine maintenance purposes.

While the disclosure has been shown and described with reference to preferred embodiments, it will be readily appreciated by those skilled in the art that changes and/or modifications may be made thereto without departing from the scope of the disclosure.