JPH04503558A - gear shroud system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] name of invention gear shroud system Technical field of invention The present invention relates to a shroud system for high-speed gear trains, in particular windage damage caused by gears in the gear train. vrindagθ1oss) and stirring power loss 1oss).

Background of the invention High-speed gear trains are prone to wind generation and agitation caused by the gears, which causes significant power loss in this gear train. Agitation generates substantial amounts of heat. Part of gear-related power loss is due to gears. This is based on the wind flow created by the wind flow and the agitation of oil between the intermeshed gears in the gear train. and Especially in the case of aircraft, it is desirable to minimize the weight of parts, so gear trains are They operate at relatively high speeds and windage losses increase. Windage continues to be a loss of power for convoys. This has become a problem.

A shroud for the gear train or part thereof has been proposed to reduce gear stirring power loss. Ru. A large space is provided between the gear and the shroud, and the gear is kept at a coolant level. Extends downward. Stirring power loss also reduces the amount of oil or cooling fluid flow to each gear. Decreased by However, even if the oil flow rate is sufficient to cool the gears, Power losses in the gear train are still unacceptably high.

Other methods of dissipating heat within the gear train result in additional power losses. Therefore the gear A shroud system for high-speed gear trains is required to minimize windage and stirring power losses. It has become. Additionally for effective circulation of cooling fluid around the gears within the gear train. A shroud system is required.

Summary of the invention According to one aspect of the present invention, in a high-speed gear train including a plurality of meshing gears, A surrounding plate is provided at the end and outside diameter. This shroud is located opposite the side of each gear. The shaft has a pair of side walls located adjacent to the outside diameter.

An end wall is arranged perpendicularly to these pair of side walls and parallel to the outer diameter of the gear, and the shroud side The walls and end walls substantially surround the tips of each of the plurality of gears in the gear train. be.

According to another aspect of the invention, a shroud for the gear train is provided. Each gear train is Each meshing gear has a plurality of sides, a tip, and an outer diameter. The shroud is a gear Encloses the outside diameter of each gear in this gear train and surrounds each side adjacent to the outside diameter of each gear in this gear train. It has a generally U-shaped curved enclosure. This enclosure has a pair of side walls and an end It has walls. The end wall includes a gear wheel that cooperates with one of the gears in the gear train. a first and a second port, the first port being capable of cooling fluid discharging from the enclosure; It's Nishide. The enclosure sidewalls further permit the suction and discharge of cooling fluid and air from the enclosure. Each of the plurality of gears has a mouth adjacent to its meshing area.

Brief description of the drawing In order to explain the invention in more detail, preferred embodiments thereof will be described below with reference to the accompanying drawings. I will clarify.

FIG. 1 is a bottom view of a portion of a gear train equipped with the gear shroud system of the present invention.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1.

Figure 3 is an enlarged plan view of a portion of the gear train in Figure 1 showing the cooling fluid injection and discharge ports. It is.

Preferred embodiment 1, 2 and 6 using like reference numerals for similar or corresponding parts. As shown, a gear shroud system 10 in accordance with the present invention is installed on a high speed gear, a portion of which is illustrated. Available in column 12. The high-speed gear train 12 includes a plurality of gears 14. Each drawing exemplifies two such gears and a portion of a third gear, but according to the present invention The gear shroud system 10 can be used for any number of gears making up the high speed gear train 12. Of course you can. In addition to the outer diameter 14c, the gear 14 has side parts 14a and 14b. It is equipped with Each gear 14 further includes gear teeth 16.

An important aspect of the gear shroud system 10 according to the present invention is that This is a shroud plate 20 that surrounds and covers the entire outer diameter of the gear 14 in the section. The shrouding plate 20 is the gear 14 The centrifugal pumping action of each gear 14 The resulting airflow is minimized so that power losses are even lower. all gears 1 The complete enclosure by the shrouding plate 20 of No. 4 prevents the cooling fluid in the high-speed gear train 12 from colliding again. Power losses are further reduced by minimizing fluid agitation. The shroud 20 has teeth. It surrounds and surrounds the outer diameter 14c together with both side parts 14a, 14t) of the wheel 14.

Each of the shrouding plates 20 is a side portion 14a of the gear 14.

The side portions 20a and 20b are arranged approximately parallel to the side portions 14b. The shroud 20 is Furthermore, the outer diameter 1 of the gear 14 is arranged approximately orthogonally to each side portion 2Qa, 20b. It has an end wall 2Oct located parallel to 4C. The shroud 20 therefore has high speed teeth. A generally U-shaped enclosure surrounding the teeth 16 of the gears 14 in the train 12 is provided.

The shroud 20 forms a continuous shroud around all gears 14 in the high speed gear train 12. Ru. Along with the spacing between the side wall 20a and the side 14a of the gear 14, the side 2 of the shroud 20 The spacing between 0b and side 14b of gear 14 is approximately 0.605 inches. gear 1 The spacing between the outer diameter 14c of 4 and the end wall 20C of shroud 2G is also approximately 105 inches. be.

In each side wall 20a, 20b of the shrouding plate 20, an opening 3 (In is arranged. , located in the area where the gears 14 mesh. The opening 3o causes a gap between each gear 14. The interlocking pump action allows free suction and discharge of air and cooling fluid. Sky The positive displacement effect caused by the meshing action of the air and cooling fluid is therefore It is not restricted to the interlocking area.

The high speed gear train 12 is provided with a cooling material, such as oil, which must be delivered to the gears 14. Cool and lubricate with fluid.

According to the invention, the cooling fluid is supplied to the injection ports 36 located in the end wall 20C of the shroud 20. The liquid is then injected into the shroud 20 through the spout 34. The cooling capacity of the cooling fluid is The cooling fluid remains within the shroud 20 and decreases as it comes into contact with another gear 14. The invention allows cooling fluid to escape from the shroud 20. Jet nozzle 6 6, adjacent to the point of the injection port 36 at intervals along the end wall 20C from the injection port 36. The discharge 038 is located in the tangential direction. Therefore, the cooling fluid is used for cooling the gear 14. When injected through the injection orifices 36 for the immediately from the shroud 20 via the outlet 38 for subsequent collection at the discharge point. discharge. A cooling fluid delivery system using a shroud 20 in accordance with the present invention provides a cooling fluid delivery system for each gear. 14 can operate in a less dense air atmosphere. Via the shroud 20 By recirculating the cooling fluid, the effectiveness and cooling rate of the cooling fluid is increased. The cooling fluid flow rate to each gear 14 is reduced to reduce agitation losses within the high speed gear train 12.

The side portion 20b of the shroud 20 further includes a baffle plate 42. The deflecting plate 42 is Cooling fluid exiting the bearing 46 is prevented from hitting any adjacent gears 14.

The shroud system according to the invention therefore covers the entire side and outer diameter of the gears in the gear train. It is obvious that the gears should be formed to cover all the gears. Gear shroud plate of the present invention The stem is placed close to each gear in the gear train, and the stem is By minimizing drifting airflow and minimizing re-impingement and agitation of the cooling fluid. and reduce power loss. Cooling fluid delivery system in cooperation with the shroud system of the present invention increases the efficiency of the cooling fluid and prevents the cooling fluid from re-impinging and licking each gear in the gear train. Ru. By using the shroud system of the present invention, wind loss and agitation loss are significantly reduced, and gear Row power losses are reduced.

Although the present invention has been described above in detail with respect to specific embodiments thereof, the present invention still encompasses the spirit thereof. Of course, it is possible to change and transform the seeds without deviating from the above.

FIG.3 Copy and translation of written amendment) Submission form (According to the provisions of Article 184-7, Paragraph 1 of the Patent Law) June 17, 1991

Claims (20)

[Claims] 1. comprising a plurality of intermeshed gears, each having a side, a tip and an outer diameter; In the shroud plate installed on the high-speed gear train, a pair of side walls facing the sides of each of the gears and disposed adjacent to the outer diameter of the gear; arranged generally orthogonally to the pair of side walls and parallel to the outer diameter of the gear. and an end wall disposed so that the side wall and the end wall of the shroud are aligned with the teeth. A shroud plate substantially surrounding the tip of each of the plurality of gears in the train. 2. a first port in the end wall capable of injecting cooling fluid onto each of the gears; , a second port through which cooling fluid can flow out of the shroud. Surrounding board for request 1. 3. Some of the gears of the plurality of gears are meshed with the side wall, and cooling fluid is supplied to the side wall. and a mouth adjacent to an area through which air can be taken in and released from said gear train. , the shroud of claim 1. 4. The distance between the side wall of the shroud and the side of the gear is approximately 0.07. The shroud of claim 1, wherein the shroud is 5 inches. 5. The spacing between the end wall of the shroud and the tip of the gear is approximately 0.075 inches. 2. The shroud of claim 1, wherein the shroud is made of 1. 6. 2. The cooling fluid according to claim 1, wherein the side wall of the shroud is provided with means for biasing the cooling fluid. Surrounding board. 7. comprising a plurality of intermeshed gears, each having a side, a tip and an outer diameter; In the enclosure plate for the gear train, surrounding the outer diameter of each gear in the gear train, and surrounding the side portion of each gear in the gear train; an enclosure comprising a generally U-shaped curvilinear enclosure surrounding adjacent to the outside diameter of the enclosure; A board. 8. The enclosure has a pair of side walls and an end wall, each side wall having a thickness of the gear. spaced apart from each other by a distance approximately 0.15 inch greater than the sidewalls; 8. The shroud according to claim 7, wherein the length of is approximately equal to the length of the teeth of said gear. 9. said end wall cooperating with some of the plurality of gears in said gear train. first and second ports are provided, and the first port injects a cooling fluid into the enclosure. , wherein the second port allows cooling fluid to be discharged from the enclosure. 8 shrouds. 10. Some of the gears of the plurality of gears are arranged on the side wall of the shroud plate. provided adjacent to the mating area, admitting cooling fluid and air from said enclosure; 9. A shroud as claimed in claim 8, further comprising two vents. 11. Cooling fluid discharged from the second port is biased toward the side wall of the shroud. 10. The shroud according to claim 9, further comprising means for causing the shroud. 12. on the side wall, on the outer diameter, within the meshing area, and on the area outside the meshing area, respectively. a plurality of meshing gears having located teeth; substantially surrounding the teeth of the plurality of gears in the out-of-mesh area; , an enclosing means that reduces gear train windage loss by being placed in close proximity to these teeth. , A gear train containing. 13. the enclosing means; a pair of side walls adjacent to the outer diameter of the gear and facing the side walls of each of the gears; disposed generally perpendicular to the pair of side walls and parallel to the outer diameter of the gear. said side walls and end walls of said enclosing means by providing end walls arranged in rows; substantially surrounds the teeth of each of a plurality of gears inside the gear train. 12 gear trains. 14. Cooling fluid is injected and discharged from the enclosing means onto the end wall of the enclosing means. 14. The gear train of claim 13, further comprising a plurality of inlets and outlets capable of exiting. 15. on said side wall of said enclosing means adjacent said teeth in said meshing area; a plurality of ports located therein for intake and discharge of cooling fluid and air from said gear train; 14. The gear train according to claim 13, wherein the gear train is capable of: 16. The spacing between the side wall of the enclosing means and the side wall of the gear is approximately 0.075 inch. 14. The gear train of claim 13, wherein the gear train is made of 17. The spacing between the end wall of the enclosing means and the teeth of the gear is approximately 0.075. 14. The gear train according to claim 13, in inches. 18. Claim 1: The side wall of the enclosing means is provided with means for diverting cooling fluid. 3 gear train. 19. The end wall of the enclosing means is provided with a plurality of inlets and outlets for directing the cooling fluid. capable of being injected and discharged from said enclosing means; on said side wall of said enclosing means, located adjacent said teeth in said meshing area; A plurality of ports are provided to allow cooling fluid and air to be drawn in and discharged from said gear train. 14. The gear train of claim 13. 20. The spacing between the side wall of the enclosing means and the side wall of the gear is approximately 0. 075 inches, and the spacing between the end wall of the enclosing means and the teeth of the gear is approximately 0.075 inches. ．． 20. The gear train of claim 19, having a diameter of 0.075 inches.