JPH04123314U - Centrifugal oil separator - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently separate air from oil. [Structure] A cylindrical container 10, an air venting means 11 arranged on the upper surface of the container 10, an inflow pipe 12 provided at the upper part of the container 10 and allowing oil to flow in approximately tangential direction,
An outflow pipe 13 that is provided at the bottom of the container 10 and allows oil to flow out in a substantially tangential direction, a porous cylinder 14 that is rotatably supported by the container 10, and a blade 1 that is fixed to the cylinder 14.
5, 16, and a conical partition plate 1 that divides the blade into two in the vertical direction.
It consists of 7 and 18.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is especially designed to be installed in the oil system of an engine and to prevent the air in the oil system. This invention relates to a centrifugal oil and gas separator for separating oil and gas.

0002

[Conventional technology]

Generally, oil in an engine is pumped through an oil pump 1 as shown in Figure 2. It is sucked up from the oil pan 2, passes through the main gallery 3, and lubricates each part of the engine. It is supplied with oil for the purpose of cooling and returned to the oil pan 2 again.

0003 At this time, oil generates bubbles due to pressure changes, collisions, splashes, drops, etc. . Air bubbles in the lubricating oil deteriorate the lubrication performance and reduce the durability of each sliding part. Not only that, but also noise is generated from the valve train equipped with the lash adjuster. . Furthermore, if a large amount of air bubbles gets mixed in, the components that make up the valve train will be damaged during high-speed operation. There was a problem that could cause an accident.

0004 Therefore, as one of the countermeasures, a tangential inflow tank type shown by code 4 was installed in the oil system. A gas-oil separator is used. Specifically, in FIG. 3, the cylindrical container 5 is An inflow pipe 6 is placed along the container, and an automatic air vent 7 is placed on the top of the container. An outflow pipe 8 is vertically installed on the lower surface of the container. This gas/oil separator 4 is an inflow pipe 6. The oil introduced from the cylindrical container 5 is swirled and flows down along the inner circumference of the cylindrical container 5. Due to the synergistic effect of the low flow rate and the centrifugal effect, the air in the oil is automatically removed. It is separated from the oil via an air bleeder 7.

[0005] Note that the outflow pipe 8 is one that protrudes from the bottom side of the container as shown by the broken line in the figure. However, the effect remains the same.

[0006]

[Problem that the idea aims to solve]

According to the conventional device described above, the oil that has entered the container through the inflow pipe has a swirling flow. As a result, the pressure at the outer periphery increases and oil and gas separation occurs, but the swirling flow energy is absorbed by the inner periphery of the container. The oil decreases due to friction between the wall and the oil, even if the outlet is tangential to the inside of the container There is still a problem in that the separation ability is low even when placed in the Therefore, the purpose of this invention is to develop a centrifugal air system that improves the efficiency of separating air from oil. Provides oil separator.

[0007]

[Means to solve the problem]

This idea is that the upper and lower parts are each formed into a small diameter part, and the central part is formed into a large diameter part. a cylindrical container, an air venting means disposed on the upper surface of the container; A flow provided at the top of the container that allows oil to flow in approximately tangential direction to the inner surface of the small diameter part. It is installed at the entrance pipe and at the bottom of the container, and is used to apply oil approximately tangentially to the inner surface of the small diameter part. an outflow pipe for discharging water; and an outflow pipe arranged concentrically with the container and rotatably supported on the container. A perforated cylinder is held, a blade is fixed radially to the perforated cylinder, and the blade is mounted on top of the perforated cylinder. A conical partition plate that is bisected downward, connected circumferentially, and opens upward. It consists of

[0008]

[Effect]

The oil discharged from the oil pump passes through the inlet pipe and comes into close contact with the inner surface of the upper part of the container. It enters in a linear direction and collides with the blade, causing it to rotate. and then one after another Oil continuously collides with the blades, further increasing the rotational speed of the blades until it reaches a constant level. The blades begin to rotate at a high speed. The oil, which is prevented from falling by the partition plate, is transported far away. The air contained in this oil is pushed back against the inner circumferential surface of the container due to the action of the mind. and gather in the center of the container. The air collected in the center of the container passes through the perforated cylinder and rises. It then goes through the air venting means and returns to the oil pan. On the other hand, the oil that is pressed against the inner surface of the container and rotates around the blades is due to its own weight. It descends along the inner surface of the container, reaches the small diameter part at the bottom, passes through the outflow pipe, and enters the main gallery. Supplied.

[0009]

【Example】

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments. In FIG. 1, the centrifugal oil separator includes a container 10, an air vent means 11, and an inflow pipe 12. , an outflow pipe 13, a perforated cylinder 14, vanes 15, 16, partition plates 17, 18, etc. ing.

0010 More specifically, the container 10 is formed in a cylindrical shape, and the upper and lower parts of the container are , are formed as small diameter portions 21 and 22, respectively. The upper small diameter portion 21 is An annular partition plate 23 is provided at an intermediate position, and a top plate 24 is equipped with a known pressure regulating air A extraction means 11 is attached.

[0011] At the center of the top plate 24 and bottom plate 25 of the container are bearings 26 and 27 facing each other. Each is fixed. A main shaft 28 is rotatably attached to these bearings 26 and 27. Supported. A perforated cylinder 14 having a porous peripheral wall is concentrically arranged on the main shaft 28. It is fixed. A suitable air vent is provided between the annular partition plate 23 and the perforated cylinder 14. A clearance G is set. In the illustrated example, the perforated cylinder 14 has radially Six doglegged blades 15 are fixed.

0012 Furthermore, the blade 15 is fixed with a partition plate 17 that divides it into two in the vertical direction. There is. The partition plate 17 as a whole has a conical shape that opens upward. this place In this case, the blades are installed in two stages, but the lower blade 16 also has a conical partition plate 18. A fixed partition plate 29 is fixed to the inner surface of the container at an intermediate position between these blades 15 and 16. Fixed. The partition plate 29 is a movable partition plate 17, 1, as shown in the figure. 8 and the lower edges 30 and upper edges 31 of each of the blades 15 and 16 are set substantially parallel to each other. lower wing The lower edge 32 of the root 16 and the lower slope 33 of the container 10 are also set parallel to the partition plate 29. is preferable.

[0013] The oil discharged from the oil pump flows from the inflow pipe 12 to the small diameter portion 15 of the vane 15. The air flows in tangentially to a and rotates this blade, but the oil The outflow direction of the fluid is also tangential, so the rotation of the blade and the fluid is in the same direction and at the same speed. The fluid resistance is extremely low. Especially when the inflow jet is in the small diameter part 15 Since the blade hits point a, the rotational speed of the blade can be maintained at a high speed.

[0014] The oil that rotates the blades 15 and 16 then passes over the partition plates 17 and 18. As the pressure increases when the It collects, is taken into the perforated cylinder 14, passes through the upper end of the perforated cylinder, and is passed through the automatic air venter 11. is returned to the oil pan.

[0015] On the other hand, the oil from which the air has been separated is stored in a stream provided tangentially to the container 10. It is sent out from the outlet pipe 13 toward the main gallery without flow resistance.

[0016] The solid arrows in the figure indicate the direction of oil movement in the container, and the dashed arrows indicate the direction of oil movement. Showing separated air flow.

[0017]

[Effect of the idea]

This invention has a configuration in which rotating blades are installed inside the conventional tangential flow type centrifugal oil separator. Therefore, it can be configured at low cost without using power, and has high efficiency in oil and gas separation. It has this effect.

[Brief explanation of drawings]

FIG. 1(a) is a plan view of a centrifugal oil separator showing an embodiment of the present invention, and FIG. 1(b) is a longitudinal cross-sectional view of the same.

FIG. 2 is a schematic diagram showing an oil system of an engine to which the present invention is directed.

FIG. 3(a) is a plan view showing a conventional gas-oil separator;
(b) is a schematic front view of the same.

[Explanation of symbols]

10. ．． ．． container 11. ．． ．． Air venting means 12. ．． ．． inflow pipe 13. ．． ．． outflow pipe 14. ．． ．． perforated cylinder 15,16. ．． ．． feather 17,18. ．． ．． Partition plate 21, 22. ．． ．． Small diameter section 29. ．． ．． fixed partition plate

Claims (1)

[Scope of utility model registration request] Claims: 1. A cylindrical container having a small diameter portion at the upper and lower portions and a large diameter portion at the center; an air venting means disposed on the upper surface of the container; an inflow pipe arranged to allow oil to flow in in a substantially tangential direction to the inner surface of the small diameter portion, an outflow pipe arranged at a lower portion of the container to allow oil to flow out in a substantially tangential direction to the inner surface of the small diameter portion, and the container It is arranged concentrically with
A perforated cylinder rotatably supported with respect to the container, blades fixed radially to the perforated cylinder, and a cone that opens upward and bisects the blade in the vertical direction and connects in the circumferential direction. A centrifugal oil separator consisting of a shaped partition plate.