JPS6176789A - Rotary machine - Google Patents

Abstract

PURPOSE:To reduce noise and vibration by providing suction and delivery ports for working fluid to a working chamber formed through partitioning of cylinder chambers on the front and rear faces of swash plate and making such that the working chamber will perform feeding phase operation. CONSTITUTION:Three working chambers M are formed respectively on the front and rear faces of swash plate between the swash plate, front casing 1, rear casing 2 and the inner walls 10, 11, 12 of housing where a suction port 15 and a delivery port 16 for working fluid are made respectively through the front casing 1 or the rear casing 2. A check valve openable only upon expansion is provided at the suction port 15 while a check valve openable upon exceeding of the pressure in the working chamber M over predetermined level is provided at the delivery port 16. Said six working chambers M will function in completely reverse phase to average the total torque of said working chambers M or the torque of entire compressor thus to suppress fluctuation resulting in reduction of noise and vibration.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a rotating machine, and is effective for use as a refrigerant compressor in an automobile air conditioner, for example.

[Conventional technology]

For example, Japanese Patent Application Laid-Open No. 1983-1976
There is a publication No. 605. As shown in this publication, in the conventional vane, an even number of vanes are disposed on the swash plate, and an even number of working chambers are formed on the front and rear surfaces of the swash plate. FIG. 5 shows such compressor drive torque fluctuations between each compression chamber and for the entire compressor. This fifth
In the case shown in the figure, the swash plate is divided into four parts, and there are four compression chambers on the front side of the swash plate and four on the rear side, for a total of 8 ([1i
! This is an example of one having a compression chamber. In the case of such a compressor, the compression chambers formed on the front and rear surfaces of the swash plate, which are located at symmetrical positions with respect to the rotating shaft, operate in exactly the same phase.

[Problem that the invention seeks to solve]

Therefore, if the torque fluctuation of each compression chamber is expressed as shown in Figure 5, the torque of the two compression chambers will be expressed by the same curve, and the torque of the entire compressor, which is the sum of the torque of each compression chamber, will be , the difference between the maximum and minimum values is large. That is, since the drive torque of the compressor fluctuates greatly, there are problems in that noise and vibration occur.

[Means for solving problems]

Therefore, in view of the above-mentioned problems, the present invention aims to reduce the variation width of the drive torque, and has the following configuration. In other words, a casing forming a cylinder chamber inside, a shaft rotatably supported by the casing, a swash plate rotatably attached to the shaft (at an angle),
an odd number of vanes that prevent rotation of the swash plate, an inner wall of the housing, the vanes, and the swash plate, and a working chamber in which the cylinder chamber is partitioned on the front and rear surfaces of the swash plate; The rotary machine is provided with an inlet for sucking working fluid and a discharge port for discharging the working fluid in the working chamber.

〔Example〕

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

Fig. 1 is a vertical cross-sectional view of the embodiment device, and Fig. 2 is ll of Fig. 1.
-ff sectional view. In the diagram, 1 is the front casing, 2
Harya casing, 10.11 is the first casing, the second
The front casing 1 and the rear casing 2 sandwich the first and second casings 10.11 and are fixed to each other by bolts (not shown). A cylinder chamber is formed by the front casing 1, the rear casing 2, and the 1.2 casing 10.11, and the inner surface 12 of the 1.2 can jig 10.11 has an arc shape as shown in FIG. There is.

The shaft 13 is composed of a front shaft 7, a rear shaft 5, and a connecting member 6 that connects the two.The front shaft 7 is rotatably supported by the front casing 1, and the rear shaft 5 is rotatably supported by the rear casing 2. It is pivoted.

The connecting member 6 has a shape in which small cylinders are provided on both bottom surfaces of a cylinder, and the small cylinder parts 6a and 6b are connected to the connecting ends 7a and 5a of the front shaft 7 and the rear shaft 5. Moreover, the central axis of this connecting member 6 is the shaft 1
Since the outer diameter of the connecting member 6 is smaller than the outer diameter of the connecting ends 7a and 5a, the groove 14 is inclined from the central axis at the connecting portion between the front shaft 7 and the rear shaft 5. is formed. In this groove part 14,
A swash plate 3 having three recesses 3a is disposed, and a sliding member 8.9 is disposed on the contact surface between the swash plate 3 and the connecting ends 7a, 5a. The swash plate 3 is rotatable around the shirt l-13 along the groove 14. A plate-shaped vane 4 is arranged in each recess 3a of the swash plate 3 and fixed to the first and second casings 10.11. This vane 4 prevents the swash plate from rotating, and even if the shaft 13 rotates, the swash plate 3 remains in its position.
Only the tip portion 3a thereof swings along the inner surface 12. The swash plate 3, the front casing 1, the rear casing 2, and the first and second casings define a total of six working chambers M, three on the front surface and three on the rear surface of the swash plate 3. These six working chambers M each have an inlet 15 in the front casing 1 or the rear casing 2 for introducing the working fluid into the working chamber M, and a discharge port for discharging the working fluid in the working chamber M. An exit 16 is drilled,
Each of the suction port 15 and the discharge port 16 is provided with a check valve (not shown).

FIG. 3 is a perspective view showing the state in which the swash plate 3 is assembled to the shaft 13 and the heel 74 is arranged. The connecting ends 7a, 5a have spherical surfaces, and have a shape in which the swash plate 3 is attached to the shaft 13 obliquely.

Next, the operation of the device of this embodiment will be explained. shaft 1
3 rotates under the driving force from an engine (not shown), the vane 3 attached to the shaft 13 swings its tip 3a along the inner wall [2, causing the working chamber M to expand, Cause contraction. When the working chamber M expands, a working fluid (for example, a refrigerant) is sucked in through the suction port 15, and when it contracts, it is compressed and discharged from the discharge port 16. It goes without saying that the check valve provided at the suction port 15 opens only during expansion, and the check valve provided at the discharge port 16 opens when the pressure within the working chamber M exceeds a predetermined value. It is. Further, the working chambers M formed on the front and rear surfaces of the swash plate 3 operate in completely opposite phases.

Here, the driving torque fluctuation of the device of this embodiment is shown in FIG. 4. In this case, since all six working chambers M are in strokes with different phases, the torque of the entire compressor, which is the sum of the torques of the working chambers M, is smoothed and becomes a small variable. This is especially noticeable when compared with what is shown in FIG.

〔Effect of the invention〕

As explained above, by using the rotating machine of the present invention, it is possible to suppress the fluctuation width of the drive torque to a small extent, and it is also possible to reduce noise and vibration.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, and FIG. 2 is an I of FIG.
3 is a perspective view showing the state in which the swash plate and vanes are arranged on the shaft, FIG. 4 is a diagram showing the drive torque fluctuation of the embodiment, and FIG. 5 is a diagram showing the drive torque fluctuation of the conventional example. FIG. ■...Front casing, 2...Rear casing. 3... Swash plate, 4... Vane, 5... Rear shaft, 6... Connecting member, 7... Front shaft, 13
...Shaft, 15...Intake port, 16...Discharge port 1M...Working chamber.

Claims (1)

[Claims] A casing that forms a cylinder chamber inside, a shaft that is rotatably supported by the casing, a swash plate that is rotatably attached to the shaft at an angle, and an odd number of plates that prevent the swash plate from rotating. a working chamber in which the cylinder chamber is defined on the front and rear surfaces of the swash plate by a vane, the inner wall of the housing, the vane, and the swash plate; an inlet for sucking working fluid into the working chamber; and a discharge port for discharging the working fluid in the working chamber.