JPH01155091A - Vane type rotary compressor - Google Patents

Abstract

PURPOSE:To increase the discharge capacity of a compressor without enlarging any outside dimensions of the compressor by partitively forming each operating chamber in both outer and inner sides of a cylindrical movable member and thereby feeding these chambers with a fluid. CONSTITUTION:When a cylindrical movable member 8 is rotated by a drive shaft, an outer end 10 comes into slidingly contact with an immovable inner circumferential surface 4a of an outer immovable member 4, and an outer operating chamber 18a is moved as expanding and contracting it between the opposed immovable inner circumferential surface 4a and a movable outer circumferential surface 8a. With expansion and contraction movements of this outer operating chamber 18a, refrigerant gas is compressed and it pushes an outer discharge valve 28a open and discharged out of an outer discharge opening 24a. Simultaneously with this, an inner end 10b of the partition member 10 comes into slidingly contact with an immovable outer circumferential surface 6b of an inner immovable member 6 by rotation of the cylindrical movable member 8, whereby the refrigerant gas is compressed likewise.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a vane-type rotary compressor, and in particular to a vane-type rotary compressor that can increase the discharge capacity without increasing the external dimensions of the vane-type rotary compressor. This invention relates to a vane-type rotary compressor that can reduce pulsation phenomena and fluctuations in drive torque.

[Conventional technology]

Rotary compressors include rolling piston type, slide hone type, turbo type, etc. Among these various types of rotary compressors, the vane type rotary compressor has a rotor, which is a cylindrical movable member with a movable outer circumferential surface, disposed within a cylinder having a fixed inner circumferential surface of a desired shape. . The rotor rotates with a movable outer circumferential surface in contact with the immovable inner circumferential surface at least at one point, and the immovable inner circumferential surface is placed in a groove formed in the movable outer circumferential surface in a substantially radial direction with respect to the rotor center. A vane, which is a partitioning member that comes in close contact with the vehicle, is provided so as to be retractable. As a result, the Hoehn-type rotary compressor forms a working chamber between the stationary inner circumferential surface of the cylinder and the movable outer circumferential surface of the rotor that expands and contracts in the rotor's rotational direction using vanes as the rotor rotates. The chamber sucks in fluid, pressurizes it, and discharges it. This vane-type rotary compressor is used, for example, in an air conditioning compressor that compresses and delivers refrigerant gas or the like.

Conventional technology for such vane-type rotary compressors involves applying an extrusion force to the vanes at low rotation speeds to properly contact the vanes with the immovable inner circumferential surface of the cylinder, thereby preventing wear and damage of the vanes. There is one designed to ensure the pump function (Japanese Utility Model Publication No. 11351/1983).

[Problem to be solved by the invention] By the way, a vane type rotary compressor has a discharge capacity that is determined by the volume of a compressing chamber that expands and contracts and is defined by vanes between the immovable inner circumferential surface of the cylinder and the movable outer circumferential surface of the rotor. will be determined. In order to increase this discharge capacity, it is possible to increase the volume of the working chamber that expands and contracts, but this requires increasing the size of the cylinder, which inconveniently increases the external dimensions of the compressor. be.

In addition, a vane-type rotary compressor intermittently sucks in fluid, compresses it, and discharges it through the sequential movement of a working chamber that is partitioned by vanes and moves while expanding and contracting as the rotor rotates, which creates a pulsating phenomenon and drives the This has the disadvantage of causing torque fluctuations.

[Purpose of the invention]

Therefore, an object of the present invention is to provide a vane-type rotary compressor that can increase the discharge capacity without increasing the external dimensions of the vane-type rotary compressor and can reduce pulsation phenomena and fluctuations in drive torque. It is about realization.

[Means for solving problems]

To achieve this object, the present invention provides an outer immovable member having an immovable inner circumferential surface of a desired shape, and an inner immovable member having an immovable outer circumferential surface of a desired shape within the immovable inner circumferential surface of the outer immovable member. A stationary member is provided, and a movable outer circumferential surface and a movable inner circumferential surface having a desired shape are provided, and the movable outer circumferential surface and the movable inner circumferential surface are arranged at at least one or more locations on the fixed inner circumferential surface and the fixed outer circumferential surface, respectively. A cylindrical movable member that rotates while being in contact with each other is disposed between the immovable inner circumferential surface and the immovable outer circumferential surface, and between the opposing immovable inner circumferential surface and the movable outer circumferential surface and the opposing immovable outer circumferential surface. and the movable inner circumferential surface, the cylindrical movable member is provided with at least one partitioning member that is in close contact with the immovable inner circumferential surface and the immovable outer circumferential surface, respectively, to define a working chamber that moves while expanding and contracting, respectively. The cylindrical movable member is provided with an inlet port and a discharge port at a forward position and a rear position in the rotational direction of the cylindrical movable member, respectively.

[Effect]

According to the configuration of the present invention, the fluid is transported by the working chambers defined by the partition members between the opposing immovable inner circumferential surface and the movable outer circumferential surface and between the opposing immovable outer circumferential surface and the movable inner circumferential surface, respectively. Inhale, compress and exhale.

In this way, a working chamber is defined within the cylindrical movable member, which has not been used in the past, and the working chambers are defined on the outside and inside of the cylindrical movable member, respectively, and fluid is supplied.
The discharge capacity of the compressor can be increased without increasing the external dimensions of the compressor.

In addition, by alternately sucking in, compressing, and discharging fluid through the working chamber, which is divided into the outside and inside of the cylindrical movable member, the fluid is discharged without interruption, which reduces pulsation and drive torque. Variability is reduced.

〔Example〕

Next, embodiments of the present invention will be described in detail based on the drawings.

Figures 1 and 2 show an embodiment of this invention.

In the figure, it is a two-vane rotary compressor. The vane type rotary compressor 2 of the present invention has an outer stationary member 4, an inner stationary member 6, a cylindrical movable member 8, and a partition member 10. It has two side plates 12 and 14 that seal both sides of the shaped movable member 8.

The outer immovable member 4 is provided with an immovable inner circumferential surface 4a of a desired shape, in this embodiment, an elliptical shape, and has two side plates 12.
・Fixed between 14 rooms.

The inner immovable member 6 is provided on one side of the side plate 12, and has a desired shape, for example, a cocoon that corresponds to the immovable inner circumferential surface 4a and has an equal distance therebetween. It is provided with a fixed outer circumferential surface 6b having a shape, and is disposed within the fixed inner circumferential surface 4a.

The cylindrical movable member 8 includes a fixed outer circumferential surface 8a having a predetermined shape facing the fixed outer circumferential surface 4a, and a movable inner circumferential surface 8b having a predetermined shape opposing the fixed inner circumferential surface 6b. This cylindrical movable member 8, these movable outer peripheral surfaces 8
The other side plate 14 is rotated so that the movable inner circumferential surface 8b and the movable inner circumferential surface 8b are in contact with the fixed inner circumferential surface 4a and the fixed outer circumferential surface 6b at at least one place, in this embodiment, at two places. Two side plates 12 and 14 are connected to the penetrating drive shaft 16 and are provided between the immovable inner circumferential surface 4a and the immovable outer circumferential surface 6b.
Both sides are sealed.

This cylindrical movable member 8 has the opposing immovable inner circumferential surface 4.
a and the movable outer circumferential surface 8a, and between the stationary outer circumferential surface and the stationary inner circumferential surface 8b facing each other, a working chamber 1 that moves while expanding and contracting, respectively.
8, that is, the immovable inner circumferential surface 4a and the immovable outer circumferential surface 6 so as to partition the outer compartment 18a and the inner and outer compartments 18b.
At least one, in this embodiment three, partitioning members 1 whose outer ends 10a and inner ends 10b are in sliding contact with b.
0 is set. This partitioning member 10 is provided in a groove 20 formed in a radial direction from the center of the cylindrical movable member 8 so as to be able to appear and retract in the direction of the immovable inner circumferential surface 4a and the immovable outer circumferential surface 8b.

In this embodiment, the stationary inner circumferential surface 4a and the stationary outer circumferential surface 6b are arranged so that the distance between the stationary inner circumferential surface 4a of the outer stationary member 4 and the stationary outer circumferential surface 6b of the inner stationary member 6 is equal.
Therefore, the outer and inner pressure-feeding chambers 18a and 18b are partitioned by a single partitioning member 10.

An outer working chamber 18a is defined by a partition member 10 between the immovable inner circumferential surface 4a and the movable outer circumferential surface 8a, and an outer working chamber 18a is defined by the partition member 10 between the immovable outer circumferential surface 6b and the movable inner circumferential surface 8b. The inner working chamber 18b has outer and inner suction ports 22a and 22b and outer and inner discharge ports 24a and 24b at the front and rear positions in the rotation direction (direction of arrow A) of the cylindrical movable member 8, respectively. and. That is,
The outer immovable member 4 is in a forward position and a rear position in the rotational direction of the cylindrical movable member 8 at a portion where the immovable inner peripheral surface 4a of the outer immovable member 4 contacts the movable outer peripheral surface 8a of the cylindrical movable member 8,
An outer suction port 22a and an outer discharge port 24a are provided, respectively. Further, the - side plate 12 at the forward position and rearward position in the rotational direction of the cylindrical movable member 8 at a portion where the movable inner circumferential surface 8a of the cylindrical movable member 8 contacts the immovable outer circumferential surface 6b of the inner stationary member 6. , an inner suction port 22b and an inner discharge port 24b are provided.

An outer suction passage 26a is provided in communication with the outer suction port 22a, and an outer discharge valve 28a is provided in the outer discharge port 24a to prevent backflow to the outer pressure-feeding chamber 18a. Further, the inner suction port 22b has an inner suction passage 26b.
An inner discharge valve 28b is provided in the inner discharge port 28b to prevent backflow to the inner pressure-feeding chamber 18b.
will be established.

Next, the effect will be explained.

When the cylindrical movable member 8 is rotated by the drive shaft 16 of the vane type rotary compressor 2, the outer end 10a of the partition member 10 comes into sliding contact with the immovable inner circumferential surface 4a of the outer stationary member 4, and the opposing immovable inner circumferential surface 4a and the movable outer circumferential surface 8a.
Move a while scaling it. As the outer working chamber 18a expands and contracts, the fluid in the outer intake passage 26a, such as refrigerant gas, is sucked into the outer working chamber 18a from the outer suction port 22a and compressed, and then pushes the outer discharge valve 28a from the outer discharge port 24a. It is opened and discharged.

At the same time as the fluid is pumped by the outer working chamber 18a, the inner end 10b of the partitioning member 10 slides into contact with the fixed outer circumferential surface 6b of the inner fixed member 6 due to the rotation of the cylindrical movable member, and the fixed outer circumferential surface 6b and the movable inner circumferential surface are opposed to each other. Inner working chamber 18b between surface 8b
Move while scaling. As the inner working chamber 18b expands and contracts, the fluid in the inner suction passage 26b, such as refrigerant gas, is sucked into the inner working chamber 18b from the inner suction port 22b and compressed, and then pushes the outer discharge valve 28a from the inner discharge port 24a. It is opened and discharged.

As a result, during one rotation of the cylindrical movable member 8, the outer working chamber 18a defined between the opposing stationary outer circumferential surface 4a and the movable outer circumferential surface 8a sucks in fluid, compresses it, and discharges it. The inner working chamber 18b defined between the stationary inner circumferential surface 6b and the movable outer circumferential surface 8b that face each other allows fluid to be sucked in, compressed, and discharged.

For this reason, the cylindrical movable member 8, which was not used in the past,
By defining an inner working chamber inside the cylindrical movable member 8, and defining outer and inner working chambers 18a and 18b on the outside and inside of the cylindrical movable member 8, respectively, and supplying fluid, the external dimensions of the compressor can be increased. It is possible to increase the discharge capacity without causing an increase in the discharge capacity.

In addition, by alternately sucking in, compressing, and discharging fluid through the working chambers defined on the outside and inside of the cylindrical movable member 8, the fluid can be discharged without interruption. Torque fluctuations can be reduced.

In this embodiment, the stationary inner circumferential surface 4a and the stationary outer circumferential surface 6b are arranged so that the distance between the stationary inner circumferential surface 4a of the outer stationary member 4 and the stationary outer circumferential surface 6b of the inner stationary member 6 is equal.
By providing the outer and inner working chambers 18a and 18
b is partitioned by a single partitioning member 10.

However, when the distance between the stationary inner circumferential surface 4a and the stationary outer circumferential surface 6b is changed by the cylinder with improved discharge performance, the third
The partition member 30 is configured as shown in FIG. That is, the partition member 3
0 is divided into an outer partition 30a and an inner partition 30b, and a sliding body 3 is provided in a groove 32 provided in one, for example, the outer partition 30a, and in a groove 32 provided in the other, for example, the inner partition 30b.
4 are slidably inserted through biasing bodies 36 that bias outward and are spaced apart from each other. In addition, the code|symbol 38 is a hole which communicates the inside and outside of the groove part 32.

In this way, by forming the outer and inner partitions 30a and 30b separately and urging them outward away from each other by the urging body 36, the distance between the immovable inner circumferential surface 4a and the immovable outer circumferential surface 6b can be reduced. The partitioning member 30 expands and contracts according to the change, and can reliably slide into and seal the immovable inner circumferential surface 4a and the immovable outer circumferential surface 6b, respectively.

Further, the outer partition body 30a and the inner partition body 30b may be provided at different positions on the movable outer circumferential surface 8a and the movable inner circumferential surface 8b without being integrated, and may be provided in different cases.

〔Effect of the invention〕

Thus, according to the present invention, the working chambers defined by the partitioning members between the opposing immovable inner circumferential surface and the movable outer circumferential surface and between the opposing immovable outer circumferential surface and the movable inner circumferential surface, respectively, It can suck in fluid, compress it, and then expel it.

For this reason, a working chamber is also formed within the cylindrical movable member, which has not been used in the past, and working chambers are formed on the outside and inside of the cylindrical movable member, respectively, and fluid is supplied. The discharge capacity of the compressor can be increased without increasing the external dimensions of the compressor.

Moreover, by alternately sucking in, compressing, and discharging fluid through working chambers defined on the outside and inside of the cylindrical movable member, the fluid can be discharged without interruption. This makes it possible to reduce pulsation phenomena and fluctuations in drive torque.

[Brief explanation of the drawing]

1 and 2 show one embodiment of the present invention, FIG. 1 is a sectional view of a vane type rotary compressor, and FIG. 2 is a sectional view taken along line nn in FIG. 1. 3 and 4 show another embodiment of the partition member, FIG. 3 is a plan view of the partition member, and FIG. 4 is the ■-r of FIG. 3.
It is a sectional view taken along the V line. In the figure, 2 is a vane type rotary compressor, 4 is an outer fixed member, 4a is a fixed inner circumferential surface, 6 is an inner fixed member, 6a is a fixed outer circumferential surface, 8 is a cylindrical movable member, 8a is a movable outer circumferential surface, and 8b
1 is a movable inner peripheral surface, 10 is a partition member, 12 and 14 are side members, 1
6 is a drive shaft, 18a is an outer working chamber, 18b is an inner working chamber, 20 is a groove, 22a is an outer suction port, 22b is an inner suction port, 24a is an outer discharge port, and 24b is an inner discharge port. Patent applicant Suzuki Automobile Industry Co., Ltd.

Claims (1)

[Claims] Providing an outer immovable member with an immovable inner circumferential surface of a desired shape,
An inner fixed member having a fixed outer circumferential surface of a desired shape is disposed within the fixed inner circumferential surface of the outer fixed member, and is provided with a movable outer circumferential surface and a movable inner circumferential surface of a desired shape, and is movable with the movable outer circumferential surface. A cylindrical movable member that rotates while its inner circumferential surface is in contact with the stationary inner circumferential surface and the stationary outer circumferential surface at at least one point or more, respectively, is disposed between the stationary inner circumferential surface and the stationary outer circumferential surface, The stationary inner circumferential surface is designed to define working chambers that move while expanding and contracting between the opposing stationary inner circumferential surface and the movable outer circumferential surface and between the opposing stationary outer circumferential surface and the movable inner circumferential surface. The cylindrical movable member is provided with at least one or more partition members that are in close contact with the fixed outer circumferential surface and the cylindrical movable member, and an inlet port and a discharge port are provided at a forward position and a rear position in the rotational direction of the cylindrical movable member, respectively. A vane type rotary compressor characterized by: