JPS5843623Y2 - rotary engine - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a so-called N5U-Wankel type rotary engine which has a structure in which the engine casing and rotor are lubricated and cooled with lubricating oil.

In this type of rotary engine, lubricating oil is pumped into the engine casing and rotor by an oil pump, but the lubricating oil is discharged using its residual pressure.

However, in this type of lubricating oil circulation system, the same lubricating oil remains in the engine casing and rotor for a long time, resulting in various problems such as an increase in oil buildup toward the engine working chamber, and carbon buildup on the rotor surface. Problems such as adhesion, sticking of various sealing materials, reduction in engine cooling effect, increase in oil consumption, and rise in bearing temperature1 occur.

The present invention is a rotary engine that has a structure in which the engine is lubricated and cooled with lubricating oil, and the lubricating oil is forcibly discharged by pump suction, thereby eliminating or reducing the various problems described above. The purpose is to

The rotary engine of the present invention will be explained below with reference to the illustrated embodiment.
and an engine casing consisting of two side housings 12 and 13, 2 a rotor, 3 a rotor shaft having an eccentric ring 31, 4 a working chamber, and 5 supply lubricating oil to various parts within the engine casing 1 and rotor 2. oil pump for, 6
7 is an oil cooler, 7 is an oil filter, 8 is an oil reservoir, and 9 is a chain transmission device for driving an oil pump.

Incidentally, since the basic structure of the N5U-Wankel type rotary engine is already widely known, a detailed explanation thereof will be omitted.

At the center of each side housing 12.13 is a main bearing shell 1.
5 or 16 are fitted, on the inner periphery of which the main bearings 17, 18 for the rotor shaft 3 are held.

Further, a rotor bearing 32 is interposed between the eccentric ring 31 of the rotor shaft 3 and the rotor 2.

One side housing 12, one rotor housing 11.
The other side housing 13 has oil chambers 22, 2, respectively.
3 or 24 are formed, and those oil chambers 22, 23
, 24 are in communication with each other.

Further, an oil chamber 25 is formed inside the rotor 2 as well.

An oil port 21 that contacts the outlet of the oil filter 7 is formed in one side housing 12 .

An in-shaft oil passage 34 is formed inside the rotor shaft 3 .

This shaft oil passage 34 is supplied with lubricating oil from the oil chamber 22 via the inlet passage 33 and the main bearing body oil passage 26, and is further supplied to the rotor bearing 32 through a branch passage 35.
Further, the branch passages 36 are arranged to distribute the oil to the main bearings 18, respectively.

The lubricating oil supplied to the rotor bearing 32 is
The oil overflows into the oil chamber 25 inside and cools the rotor 2.

The lubricating oil supplied to the main bearing 18 overflows into the bearing chamber 37 and further flows into the oil chamber 24 through an oil passage 38 formed in the main bearing shell 16.

In the figure, reference numeral 5a indicates a discharge port of the oil pump 5, and 5b
22a is the inlet of the pump, 22b is the inlet of the oil chamber 22, and 22b is the inlet of the pump.
lIi is the outlet of the oil chamber 22, 24a is the inlet of the oil chamber 24, 2
4b is an outlet of the oil chamber 24, 27 and 28 are oil passages connecting the rotor oil chamber 25 and the side housing oil chambers 22 and 24, respectively, 39 is an oil pumping pipe, 40 is an oil pump suction pipe, and 41 is an oil pump suction pipe. An oil pump discharge pipe, 42 is a connecting pipe between the oil cooler 6 and the oil filter 7, 43 and 44 are oil take-off pipes for discharging lubricating oil from the oil chamber outlet 22b or 24b, respectively, and 45 is a pipe for discharging lubricating oil from the oil chamber outlet 22b or 24b. 8, a bypass pipe 46 connects the oil return pipe 45 and the oil pump suction pipe 40, and 51 adjusts the amount of lubricating oil bypass from the oil return pipe 45 to the bypass pipe 46. control valve for, 5
7 is a control valve for adjusting the amount of lubricating oil sucked into the oil pump 5.

In the illustrated rotary engine, lubricating oil flows as follows.

That is, the lubricating oil is sucked into the oil pump 5 through the pipes 39 and 41 and further discharged from the discharge port 5a.
After being cooled and dust removed by an oil filter 7, the oil flows into the engine casing 1 through an oil port 21.

The lubricating oil that has flowed into the engine casing 1 then flows through each part of the engine as shown by arrows A to L, and finally reaches the oil chamber outlet 22b of both side housings 12 and 13.
and 24b, and is discharged to the outside of the engine casing 1 as shown by arrows M and N.

At this time, since the lubricating oil outlet pipes 43 and 44 are connected to the oil pump suction pipe 40 by the control valve 51 and the bypass pipe 46, the lubricating oil discharged from the engine casing 1 is forcibly sucked under negative pressure, thereby The distribution of lubricating oil inside the engine will be promoted.

In the illustrated embodiment, the original oil pump 5 is also used for forcibly discharging lubricating oil, but in other embodiments of the present invention, the control valve 51 and the bypass pipe 46 are eliminated, and instead, the lubricating oil is It is also possible to connect a pump 753 exclusively for discharge to the middle of the oil return pipe 45.

Next, to explain the effects of the present invention, the rotary engine of the present invention uses a pump to forcibly discharge the lubricating oil that has passed through each part of the engine as described above. This promotes the problem of conventional problems such as oil buildup to the engine working chamber 4 side, carbon adhesion on the rotor surface, sticking of various sealing materials, decrease in engine 4 cooling effect, increase in oil consumption, and increase in bearing temperature. These problems will be significantly improved.

In particular, the improvement in the cooling effect on the inside of the rotor, the main bearing, etc., where lubricating oil tends to accumulate, is particularly remarkable.

[Brief explanation of drawings]

The figure is a lubricating oil distribution system diagram in a rotary engine according to an embodiment of the present invention. 1...Engine casing, 2...Rotor, 3...
・Rotor shaft, 5... Oil pump, 6... Oil cooler, 7... Oil filter 8... Oil reservoir.

Claims (1)

[Scope of utility model registration request] The interior of the engine casing 1 and rotor 2 is lubricated and cooled with lubricating oil, and the lubricating oil after passing through the engine casing 1 and rotor 2 is pumped through an appropriate pump 5.
A rotary engine characterized by forcibly discharging air by suction.