JPS59213987A - Rotary compressor - Google Patents

Abstract

PURPOSE:To make smooth the rotation of a rotary sleeve, by forming, in the inner peripheral surface of the rotary sleeve, a recessed groove which engages with the front end of at least one of vanes. CONSTITUTION:A recessed groove 301 which is engaged with the front end of at least one of vanes 16 is formed in the inner peripheral surface of a rotary sleeve 30 rotably journalled to a center housing 22. Upon starting the rotary sleeve is surely and forcingly rotated while the vanes 16 engages in the recessed groove 301 in the inner peripheral surface of the rotary sleeve 30. Therefore, no risk of locking of the vane 16 due to the rotation of a rotor is brought about. Further there may be provided such an urging function that dynamic pressure bearing is established in an air-bearing chamber 40 between the outer peripheral surface of the rotary sleeve and the inner peripheral surface of the center housing 22.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a Be-17 type rotary compressor that can be used as a supercharger for an internal combustion engine, and more specifically, a sleeve that rotates together with a vane between a center housing and a rotor. This relates to a rotary compressor equipped with.

The applicant of the present invention first proposed a vane-type rotary compressor in which a rotary sleeve is interposed between the rotor and the center and the rotating sleeve is supported by a compressible fluid such as air, in Japanese Patent Application No. 56. -162025).

In this compressor, the rotating sleeve rotates with the vane and completely prevents heat generation and wear caused by the sliding of the vane tips, so the compressor is used for supercharging automobiles that operate at a wide range of rotation speeds from low to high speeds. It can be said that it is the most suitable machine.

However, at the time of startup, the pressure in the air bearing chamber, which is the space formed by the inner circumferential surface of the safety bolt and the outer circumferential surface of the rotating sleeve, is atmospheric pressure or lower, and the inner circumferential surface of the center hatching and the outer circumferential surface of the rotating sleeve are are in contact, that is, in a state where they cannot sufficiently support the rotating sleeve, and the rotating sleeve is under the compression pressure vc of the compressor at the time of startup.
, J: ,! l) It is pressed against the inner peripheral surface of the safety housing.

As a result, the rotation of the rotating sleeve lacks smoothness, resulting in torque fluctuations and abnormal temperature rises during startup.

The technical problem of the present invention is to smooth the rotation of the rotating sleeve,
The purpose of the present invention is to provide an excellent rotary compressor without torque fluctuation and abnormal hot water temperature rise.

In order to solve the above technical problem, the configuration of the rotational pressure is, that is, the technical means of the present invention is as follows.

In a rotary compressor completely equipped with a rotary sleeve rotatably supported on a center housing, a rotor rotating at an eccentric position of the rotary sleeve, and a vane fitted in and out of the rotor, at least one vane tip This is because a concave groove that engages with the rotary sleeve is provided on the inner circumferential surface of the rotating sleeve.

With the above technical means, the vane and the rotating sleeve are integrally formed, and the rotating sleeve is forced to rotate reliably from the time of startup, and at the same time, a recess is formed on the inner peripheral surface of the rotating sleeve to engage with the vane. Since the groove is formed, there is no risk of the mechanical vane being locked by the rotation of the rotor, and at the same time, a dynamic pressure bearing is formed in the air bearing chamber between the outer circumferential surface of the rotating sleeve and the inner circumferential surface of the center housing. By combining the biasing function, smoother rotation can be obtained, which is a unique function and effect of the present invention.

An embodiment of the present invention will be fully explained below based on the drawings. As shown in FIGS. 1 and 2, a rotary shaft 12 integral with the rotor 10 of the compressor is connected to front and rear side housings 21.
The pulley 14 is supported by bearings 18 and 19 inside the pulley 23, and is attached to the front shaft end of the pulley 14, which receives the rotational drive of the engine.

A revane 16 is fitted into each of the plurality of bevel grooves 15 of the rotor 10 so as to be removable and removable, and the tip of the bee 716 contacts the rotating sleeve 30 surrounding the rotor 10 .

The rotating sleeve 30 is housed inside the setter housing 22, and a thin film-like air bearing chamber 40 is interposed between the two.

A rear cover 24 is fixed to the back surface of the rear side housing 23 via a gasket, and a discharge chamber 4J and a suction chamber 51 are provided in the rear cover.

The discharge chamber 41 communicates with the discharge hole 42 via the discharge valve 60,
The discharge hole communicates with a discharge side working chamber 43 between the rotor 1o and the rotating sleeve 30.

A vane groove back pressure communication hole 48 extending from the discharge chamber 41 to the vane groove bottom 73 is provided to introduce discharge pressure into the vane groove 15 to facilitate the protrusion of the vane 16.

The suction chamber 51 communicates with a suction working chamber 53 on the opposite side via a suction hole 52'f.

An annular groove 26 is provided on the sliding surfaces of the front and rear side housings 21, 23 with respect to the rotating sleeve 30, and the edgeless sliding member 25 is fitted into the annular groove 26.

The bolt 27 passes through the thick part 28 of the setter housing 22, and the front and rear side housings 21, 23,
Tighten the setter housing 22 and rear cover 24 in the axial direction.

As shown in FIG. 1, a high pressure hole 44 and a low pressure hole 54f are formed from the discharge chamber 41 and suction chamber 52 through the rear side housing 23 to the end face of the setter housing 22, and the center housing is in contact with the high pressure hole and the low pressure hole. An inflow lower 1 and an outflow lower 2 extending in the axial direction from the end face of 22 are provided, respectively.

The inflow lower 1 and the outflow lower 2 are groove-shaped openings on the inner circumferential surface of the setter housing 22, respectively, and the rear side...Ujifugu 2
The high pressure hole 44 and the low pressure hole 54 of No. 3 communicate with each other.

Rotating Three 73011 Contact Setter Housing 2
Since the contact area on the inner circumferential surface of No. 2 is on the discharge side, the air flow in the contact area will increase if it is provided at the beginning and end of the discharge side at the inflow lower 1 and outflow lower 2 as shown in Figure 2. .

However, if the location of the contact area can be determined from the beginning,
An inflow lower 1 and an outflow lower 2 are provided according to the contact area.

Since the rotating sleeve 30 during high-speed rotation exerts a suction action on the inflow lower 1, the inflow lower 1 does not necessarily need to be connected to a high-pressure discharge chamber, but can be connected to the atmosphere and draw in outside air from the inlet. It's okay.

Since the air flowing through the contact area can enter the working chamber on the suction side from the end face of the rotating sleeve 3o, the outflow lower 2 may be omitted.

In such a rotary compressor, by providing a concave groove 301 that engages with the vane 16 on the inner peripheral surface 302 of the rotary sleeve 30 (in this ψ case, the groove 301 has a length equal to the axial width of the Q-n). The vane and the rotating sleeve 30 are interlocked.

(Fig. 3, 5th medical examination book) Therefore, by forcibly rotating the rotating sleeve 30' (il-rotor 10) from the time of startup and forming a dynamic pressure bearing more quickly in the air bearing chamber 40, smoother operation can be achieved. This has the effect of providing rotation.

Similarly, the reason why the recessed groove 301 is made into the curved surface α is that the rotor 10 and the rotating sleeve 30 are in the eccentric position, so when the vane 16 and the groove 301 are perfectly fitted, the rotor 10
This is because the ERIBE/16 may be locked in the rotation of the ERIBE/16 and may be destroyed. (See Fig. 3) In addition, the recess F# provided in the inner circumferential surface 302 of the rotating sleeve
301 is a part of the rotating sleeve 30, that is, one or more recesses! 303, 304, and 305 may be provided.

In this case, the tip of the base 716 is connected to these grooves 303 and 304.
.

6 evil as engaging with 305 161 , 162 , 163
is necessary. (See Fig. 4 and Fig. 6 B) The point is that the rotation sleeve should be interlocked with the P/.

[Brief explanation of the drawing]

Section 1 is a vertical sectional front view of a vane type rotary compressor which is an embodiment of the present invention, FIG. 2 is a cross-sectional side view taken along the line A-A' in FIG. FIG. 4 shows a rotor with a plurality of recesses formed on the inner circumferential surface of the rotating sleeve, and FIG. 5 shows a rotor with vanes that match the concave curved surface of the rotating sleeve shown in FIG. 6 is a partially sectional perspective view corresponding to the recess of the rotating sleeve of FIG. 4; FIG. 10: Rotor 15: Vane 16: Vane 7 22: Center/terhousing/g 30; Rotating sleeve 301: Concave groove Patent applicant Nippon Piston Ring Co., Ltd. Figure 1! L-A' Figure 2, jU Figure 4

Claims (2)

[Claims] (1) In a rotary compressor comprising a rotary sleeve rotatably supported on a center housing, a rotor rotating at an eccentric position of the rotary sleeve, and a bell and metal fitting fitted into the rotor so as to be removable and removable. , a concave lfl that engages at least one tip of the bevel! A rotary compressor characterized in that a groove is provided on the inner peripheral surface of a rotary sleeve. (2) The rotary compressor according to claim 1, wherein the concave groove is formed of a concave curved surface.