JP-7856947-B2 - oil tank

Inventors

• 友田 桂樹

Assignees

• トヨタ自動車株式会社

Dates

Publication Date

20260512

Application Date

20230518

Claims (1)

1. An oil tank in which a cyclone separator is installed inside the tank case to send oil that is supplied from above downwards while swirling it, A baffle member is provided between the cyclone separator and the tank case. The aforementioned baffle member is It has multiple baffle plates, a bottom plate, and a top plate, The multiple baffle plates are arranged at equal intervals in the circumferential direction of the cyclone separator between the cyclone separator and the tank case, and extend continuously from the bottom of the tank case upwards above the oil level of the oil stored in the tank case . The bottom plate is joined to the end on the cyclone separator side at the lower edge of the baffle plate. An oil tank in which the upper plate is provided with an insertion hole into which the cyclone separator is inserted, and the upper edge of the baffle plate is joined to form a plurality of ventilation holes .

Description

This invention relates to an oil tank. Patent Document 1 discloses an oil tank equipped with a separator that separates air mixed in with lubricating oil by centrifugal force generated by the swirling of the incoming lubricating oil inside a cylindrical tank body. In this oil tank, the separator is supported by a support member that is joined to the tank body above the oil surface. Japanese Patent Publication No. 2006-118463 Figure 1 is a schematic cross-sectional view of the oil tank according to this embodiment, along the vertical direction.Figure 2 is a perspective view of the cyclone separator and baffle members arranged inside the tank case.Figure 3 is a side view of the cyclone separator and baffle member arranged inside the tank case.Figure 4 is a rear view of the baffle member placed inside the tank case.Figure 5 is a schematic cross-sectional view of an oil tank according to another embodiment, along the vertical direction.Figure 6 is a schematic cross-sectional view along the horizontal direction of an oil tank according to another embodiment.Figure 7 is a side view of the baffle plate.Figure 8 is a side view of a baffle plate of a different shape.Figure 9 is a schematic cross-sectional view along the horizontal direction showing a modified example of an oil tank according to another embodiment. Embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1 is a schematic cross-sectional view of the oil tank 10 according to this embodiment, along the vertical direction. As shown in Figure 1, the oil tank 10 according to this embodiment has a tank case 11 and a cyclone separator 12. Furthermore, the oil tank 10 is equipped with a baffle member 13. This oil tank 10 is installed alongside a dry-sump type engine (internal combustion engine) and circulates oil O between the engine and the tank. The tank case 11 consists of a cylindrical case body 21 at the top and a narrower cylindrical outlet section 22 at the bottom. Oil O is stored within the tank case 11, which comprises the case body 21 and the outlet section 22. The tank case 11 has a cyclone separator 12 positioned inside the case body 21. The tank case 11 has an oil inlet 23 near the top of the case body 21. This oil inlet 23 is connected to an intake pipe 26, described later, provided on the cyclone separator 12. The tank case 11 also has an oil outlet 24 at the lower end of the outlet 22. Furthermore, the tank case 11 has a gas exhaust 25 at the top of the case body 21. The tank case 11 has an oil inlet 23 connected to the engine via a discharge pipeline (not shown), and an oil outlet 24 connected to the engine via a delivery pipeline (not shown). Oil O from the engine is supplied to the tank case 11 through the discharge pipeline via the oil inlet 23 by a discharge pump (not shown). The oil O in the tank case 11 is then pumped under pressure from the oil outlet 24 to various parts of the engine by a delivery pump (not shown). Furthermore, the tank case 11 has a gas exhaust section 25 connected to the engine's intake pipe via an exhaust conduit (not shown), and the gas above the oil level OL inside the tank case 11 is exhausted through the exhaust conduit. The cyclone separator 12 is formed in a cylindrical shape. The upper part of the cyclone separator 12 is fixed to the upper plate portion 21a, which constitutes the upper part of the case body 21 of the tank case 11. As a result, the cyclone separator 12 is supported by the tank case 11 while being housed inside the case body 21. In this supported state, the cyclone separator 12 is positioned with a gap between it and the peripheral plate portion 21b that constitutes the periphery of the case body 21. The cyclone separator 12 has an intake pipe section 26 on a portion of its upper circumference. This intake pipe section 26 protrudes tangentially from the cyclone separator 12, and the oil O supplied to the oil inlet section 23 of the oil tank 10 flows into the interior of the cyclone separator 12 through the intake pipe section 26. The bottom of the cyclone separator 12 is open, and this open bottom serves as the outlet 27. In this cyclone separator 12, the oil O that flows in from the intake pipe section 26 swirls downwards and flows out into the case body 21 of the tank case 11 through the outlet 27. Figure 2 is a perspective view of the cyclone separator 12 and baffle member 13 arranged inside the tank case 11. Figure 3 is a side view of the cyclone separator 12 and baffle member 13 arranged inside the tank case 11. Figure 4 is a rear view of the baffle member 13 arranged inside the tank case 11. As shown in Figures 2 to 4, the baffle member 13 has multiple baffle plates 31. The baffle member 13 is supported by the peripheral plate portion 21b of the case body 21 of the tank case 11. The baffle plate 31 of the baffle member 13 is positioned between the cyclone separator 12 and the tank case 11. Specifically, the baffle plate 31 is positione