JP2816587B2 - Positioning device for scroll fluid machine - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a positioning device for a scroll fluid machine suitable for use in, for example, an air compressor, a vacuum pump, and the like. The present invention relates to a positioning device for an oilless scroll fluid machine that does not supply oil or the like.

[Conventional technology]

Generally, scroll fluid machines include an oil-supply type in which lubricating oil or the like is supplied between the orbiting scroll and the fixed scroll, and a non-lubricating type in which lubricating oil is not supplied between the orbiting scroll and the fixed scroll. The figure shows an example in which an oilless scroll fluid machine is used as an air compressor.

In the figure, reference numeral 1 denotes a casing formed in a stepped cylindrical shape,
The casing 1 includes a small-diameter cylindrical portion 2 serving as a bearing portion, a large-diameter cylindrical portion 3 having an inner flange portion 3A protruding radially inward,
The lower end of the casing 1 is swirled by the bottom lid 4. Reference numeral 5 denotes an annular thrust bearing provided on the inner flange portion 3A of the large-diameter cylindrical portion 3. The thrust bearing 5 slides on the back surface of the orbiting scroll 10 described later to receive a load in the thrust direction. It has become.

Reference numeral 6 denotes a drive shaft which is located on the axis line OO and is rotatably provided on the casing 1 via the bearings 7, 7 and 8, and the lower end of the drive shaft 6 projects out of the casing 1 to provide a motor. (Not shown), the upper end of which is connected to the large-diameter cylindrical portion 3.
Extending to the inner has become a crankshaft 6A, the axis O ₁ -O ₁ of the crankshaft 6A is eccentric by a predetermined distance δ with respect to the axis O-O of the drive shaft 6. On the upper side of the drive shaft 6, a balance weight 9 for balancing during rotation is positioned and fixed to the large-diameter cylindrical portion 3.

10 is a slewing bearing 11 on the tip side of the crankshaft 6A of the drive shaft 6.
The orbiting scroll 10 is rotatably attached to the end plate 12. The orbiting scroll 10 includes a mirror plate 12, a spiral wrap portion 13 erected on the front surface of the mirror plate 12, and a central portion on the rear side of the mirror plate 12. And a boss portion 14
13 and a wrap portion 18 of a fixed scroll 16 to be described later overlap to define compression chambers 15, 15,.

16 has a stepped portion 16A and the orbiting scroll 10
The fixed scroll 16 is formed in the shape of a stepped cover, and fixed with bolts (not shown) or the like so as to open the upper end side of the casing 1. Large-diameter cylindrical portion 3 of the casing 1 by means
Fixed on top. And the fixed scroll 16 is
The mirror plate 17 is roughly composed of a mirror plate 17, a spiral wrap portion 18 erected on the front surface of the mirror plate 17, and a flange 19 formed on the outer peripheral side of the mirror plate 17 so as to surround the wrap portion 18.
A flange 19 of the fixed scroll 16 prevents the orbiting scroll 10 from rotating when the drive shaft 6 rotates between the end plate 12 of the orbiting scroll 10 and the rotating scroll 10 with the axis OO as the center. An auxiliary crank (not shown) that gives only a turning (revolution) motion having a turning radius δ is provided.

Reference numerals 20 and 21 denote a suction port and a discharge port formed in the fixed scroll 16, the suction port 20 is bored in the flange 19 so as to communicate with the compression chamber 15 on the outermost peripheral side, and the discharge port 21 is located on the most central side. Is formed at the center of the end plate 17 so as to communicate with the compression chamber 15.

The scroll-type air compressor according to the prior art has the above-described configuration, and its operation will now be described.

When the drive shaft 6 is rotationally driven by a motor in the direction of arrow A, the rotation is transmitted from the crankshaft 6A to the orbiting scroll 10 via the orbiting bearing 11, and the orbiting scroll 10 is centered on the axis OO of the drive shaft 6. As a result, each of the compression chambers 15 defined between the wrap portion 13 of the orbiting scroll 10 and the wrap portion 18 of the fixed scroll 16 is continuously reduced, and the suction port 20 is formed. While compressing the air sucked from the inside of each compression chamber 15, the compressed air is discharged from the discharge port 21 to an external air tank (not shown) or the like to perform a compression action.

Here, when the fixed scroll 16 is fixed to the casing 1 without being accurately positioned with respect to the casing 1 and the orbiting scroll 10, the wrap portion 13 of the orbiting scroll 10 when the orbiting scroll 10 is turned by the drive shaft 6. And the wrap portion 18 of the fixed scroll 16 comes into contact with each other, and a so-called galling phenomenon occurs between the wrap portions 13 and 18, causing a decrease in life, reliability, performance, and the like. The positioning with respect to the casing 1 and the orbiting scroll 10 requires strict accuracy.

Thus, the positioning of the fixed scroll 16 with respect to the casing 1 and the orbiting scroll 10 according to the prior art is performed manually by a skilled operator. That is, first, the orbiting scroll 10 is assembled in the casing 1, the fixed scroll 16 is combined with the orbiting scroll 10, and the orbiting scroll 10 is manually orbitally rotated through the drive shaft 6.
The worker can determine whether or not the lap portions 13 and 18 are in contact with each other by the presence or absence of a small orbiting motion of the fixed scroll 16, a slight frictional resistance when the orbiting scroll rotates 10 times, or a small noise. , And manually adjust the position of the fixed scroll 16 while
The positioning of the sixteen casings 1 and the orbiting scroll 10 is performed.

[Problems to be solved by the invention]

However, in the above-described prior art, since the positioning of the fixed scroll 16 with respect to the casing 1 and the orbiting scroll 10 is manually performed by a skilled worker, the productivity is reduced and it is difficult to mass-produce the scroll compressor. In addition to this, the positioning of the fixed scroll 16 is performed based on the experience of each worker, so that the positioning accuracy "variation" occurs, and the quality such as life and compression efficiency is to be uniform. There is a problem that can not be. In the case of a refueling scroll type air compressor,
Since lubricating oil or the like is sealed between the orbiting scroll 10 and the fixed scroll 16, an oil film is formed between the wrap portions 13 and 18, and a gap can be formed between the wrap portions 13 and 18 by the oil film. Although the positioning of the fixed scroll 16 was relatively easy, the positioning of the fixed scroll 16 was skilled in an oilless scroll type air compressor because no oil film was interposed between the wrap portions 13 and 18. There is a problem that it is very difficult even for a worker who has worked.

In addition, recently, there is a remarkable shortage of the working population engaged in the manufacturing industry, and it is extremely difficult to secure and train skilled workers. This leads to a problem that product competitiveness is reduced.

The present invention has been made in view of the above-described problems of the related art, and the present invention can automatically perform the positioning of the fixed scroll with respect to the casing and the orbiting scroll,
It is an object of the present invention to provide a scroll fluid machine positioning device capable of uniforming the positioning accuracy to improve the performance such as life and compression efficiency, and increasing the productivity to facilitate mass production.

[Means for solving the problem]

In order to solve the above-described problem, a feature of a configuration adopted by the present invention is that a fixed base for fixing the casing in a state where the fixed scroll is freely combined with the casing incorporating the orbiting scroll, and a peripheral part of the fixed scroll. A plurality of displacement amount detecting means arranged at predetermined intervals in the direction to detect a radial displacement amount of the fixed scroll when the orbiting scroll is turned, and a fixed scroll device for pushing the fixed scroll in the radial direction. A plurality of adjusting means arranged at predetermined intervals in the circumferential direction to adjust the position of the fixed scroll with respect to the orbiting scroll; and each adjusting means is adjusted based on the displacement of the fixed scroll detected by each of the displacement detecting means. It is configured to be driven to position the fixed scroll with respect to the casing and the orbiting scroll.

[Action]

With the above configuration, when each of the wrap portions of the orbiting scroll and the fixed scroll comes into contact with each other when the orbiting scroll is turned, the fixed scroll is displaced in the radial direction, and the amount of displacement of the fixed scroll is detected by each displacement amount detecting means. The fixed scroll can be pushed to the optimum position with respect to the orbiting scroll by driving the respective adjusting means based on these displacement amounts, and automatic position adjustment can be performed.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 7. In the present embodiment, the same components as those of the above-described related art are denoted by the same reference numerals, and description thereof will be omitted.

In the figure, reference numeral 31 denotes a fixing base for fixing the casing 1, and the casing 1 is inserted into an insertion hole 31 </ b> A of the fixing base 31 and fixed to the fixing base 31. , Are four rail members (only two are shown) attached to the upper surface of the fixed base 31 at intervals of 90 degrees in the circumferential direction of the insertion hole 31A of the fixed base 31; Reference numerals 33,... Denote four support bases (only two are shown) movably provided on the upper side of each rail member 32, and mounting plates 34, 34,. Has been established. The mounting holes 34 of each mounting plate 34
A is provided with a feeding device 35 described later, and a micrometer 37 described later is mounted in the mounting hole 34B.

Are fixed scrolls 16 through the respective mounting plates 34.
The four feeders (2) are arranged at 90 degrees apart in the circumferential direction of the
Only each of the feeders 35 is shown, and adjustment rods 35A, 35A each having a screw screw formed on the entire periphery are movably provided on the distal end side of each feeder 35, and the base end side is described later via harnesses 36, 36. Connected to the control unit 39 side. And
Each of the feeders 35 is controlled by a drive signal output from a control unit 39 via a harness 36 or the like.
A is sent out, and the position of the fixed scroll 16 is adjusted with respect to the casing 1 and the orbiting scroll 10 by pushing the step 16A of the fixed scroll 16 in the radial direction.

.. Are positioned below the feeders 35, and are displaced by 90 degrees in the circumferential direction of the fixed scroll 16 via the mounting plates 34 together with the feeders 35. Four electric micrometers (only two are shown) are shown as detecting means. The micrometer 37 detects the amount of displacement of the fixed scroll 16 in the radial direction by the displacement of the displacement rod 37A, and outputs the detected displacement signal. The signals are output to the control unit 39 via the harnesses 38, 38.

Reference numeral 39 denotes a control unit having a built-in arithmetic processing unit, storage unit, interface unit (all not shown), and the like. The control unit 39 has a keyboard 39A for an operator to input commands and the like from outside, and a fixed unit. A display 39B and the like for displaying the positioning state of the scroll 16 and the like are provided, and the control unit 39 is connected to the input / output control device 40 via a harness 41. Then, the control unit 39 is connected to each feeder 35 and each micrometer 37 via the input / output control device 40 and the like, and performs a control process shown in FIG. 2 based on a displacement signal from each micrometer 37, The positioning adjustment amount of the fixed scroll 16 is calculated, and a drive signal corresponding to the adjustment amount is output to each feed device 35.

The positioning device of the scroll fluid machine according to the present embodiment has the above-described configuration. Next, the operation when the fixed scroll 16 of the scroll air compressor is positioned using the positioning device will be described.

First, as shown in FIG. 3, the casing 1 in which the orbiting scroll 10 is incorporated is inserted into the insertion hole 31A of the fixed base 31 and fixed to the fixed base 31, and the fixed scroll 16 is wrapped therefrom. The part 18 overlaps with the wrap part 13 of the orbiting scroll 10 and is combined so as to be in a free state. Next, the fourth
As shown in FIG. 5 and FIG. 5, each support 33 is attached together with the mounting plate 34, the feeder 35, the micrometer 37, etc., together with the adjustment rod 35A of the feeder 35 and the displacement rod 37A of the micrometer 37,
Each of them is moved to a position where it comes into contact with the outer peripheral side surface of the fixed scroll 16.

Then, when the operator inputs a command to the control unit 39 via the keyboard 39A, the control unit 39 performs a control process shown in FIG. That is, in step 1, the drive shaft 6
The motor connected to the lower end of the orbit is driven, thereby turning the orbiting scroll 10 via the drive shaft 6 or the like as indicated by an arrow A shown in FIG.
Turn in the direction. In this case, the wrap portion 18 of the fixed scroll 16 and the wrap portions 13 of the orbiting scroll 10 are in non-uniform contact with each other. Start exercising, but continue lapping.
As they gradually adapt and come into uniform contact, the turning of the fixed scroll 16 converges to a relatively small one (see FIG. 6).

Then, in step 2, a displacement signal is read from each micrometer 37, and in step 3, it is determined based on the displacement signal whether the turning of the fixed scroll 16 has become minute rotation. Now, if "YES" is determined in step 3,
A state where the lap portions 13 and 18 are in uniform contact (Fig. 7 (a)
Therefore, the motor is stopped and the process proceeds to step 4. In step 4, the positioning adjustment amount of the fixed scroll 16 is calculated based on the displacement signal read from each micrometer 37, and in step 5, the driving is performed based on the adjustment amount. A signal is output to each feed device 35 to drive each feed device 35, and the fixed scroll 16 is moved via the adjustment rod 35A as indicated by an arrow B shown in FIG.
In the direction of rotation, thereby rotating the position of the fixed scroll 16 so as to generate a uniform minute gap over the entire circumference between the wrap portion 18 of the fixed scroll 16 and the wrap portion 13 of the orbiting scroll 10. Adjustment is made for the scroll 10 (see FIG. 7 (b)).

On the other hand, if "NO" is determined in the step 3, the process returns to the step 1, and the motor is rotated again. Then, at step 6, the operator is notified via the display 39B that the positioning of the fixed scroll 16 has been completed,
The operator moves the fixed scroll 16 to the large-diameter cylindrical portion 3 of the casing 1.
The upper part is fixed using fixing means such as bolts.

Therefore, according to the present embodiment, the positioning of the scroll fluid machine is performed by changing the turning state of the fixed scroll 16 to the displacement rod 37.
A micrometer 37 that detects through A and a feed device 35 that pushes the fixed scroll 16 radially through an adjustment rod 35A to adjust the position of the fixed scroll 16 with respect to the casing 1 and the orbiting scroll 10. Four fixed scrolls 16 are arranged at intervals of 90 degrees in the circumferential direction, and further, a positioning adjustment amount of the fixed scroll 16 is calculated based on a displacement signal from each micrometer 37, and the fixed scroll 16 is turned. Since the feed unit is provided with a control unit 39 for outputting a drive signal based on the adjustment amount for positioning with respect to the casing 10 and the casing 1,
Fixed scroll 16 casing 1 and orbiting scroll
The positioning of the fixed scroll 16 can be performed automatically and promptly, the positioning accuracy of the fixed scroll 16 can be made uniform with high precision, and the performance such as life, compression efficiency, and durability can be greatly improved. Furthermore, productivity can be increased and mass production can be easily achieved. And since the positioning device is substantially composed of the fixed base 31 having a simple structure and the feeder 35, the micrometer 37 and the control unit 39 of mass-produced products, the entire positioning device can be reduced in cost, and the existing positioning device can be reduced. Installation on a production line is extremely easy,
It produces various effects.

In the above-described embodiment, each feed device 35 and each micrometer 37 have been described as being spaced apart by 90 degrees in the circumferential direction of the fixed scroll 16. And two or three micrometers 37, respectively.
Or more than five, and these may be arranged at predetermined intervals other than 90 degrees in the circumferential direction of the fixed scroll 16. Any number and position may be used as long as they can be pushed in the direction and each micrometer 37 can detect the amount of displacement in the radial direction of the fixed scroll 16.

Further, in the above-described embodiment, the electric micrometer 37 is used as the displacement amount detection means, and the displacement rod 37A is brought into contact with the outer peripheral side surface of the fixed scroll 16 so that the fixed scroll
Although described as detecting the displacement amount of 16, a laser type distance measuring sensor may be used as the displacement amount detecting means, or a simple image processing device for dimension measurement using an ITV camera is used. In this case, the displacement amount of the fixed scroll 16 can be detected in a non-contact manner.

Further, in the above-described embodiment, the feeding device 35 using a screw is used as the adjusting device.However, the present invention is not limited to this, and another feeding device such as a linear motor or a handling robot may be used as the adjusting device. What is necessary is just to be able to adjust the position of the fixed scroll 16 based on the drive signal from the control unit 39.

Further, in the above-described embodiment, each feed device 35 and each micrometer 37 are described as being mounted on the mounting plate 34 on the support base 33. Alternatively, each feed device 35 and each micrometer 37 may be fixedly scrolled. Using a support member from above, the fixed scroll 16 may be supported at 90 degrees apart in the circumferential direction.
It is only necessary that 35 can push the fixed scroll 16 in the radial direction, and that each micrometer 37 can detect the amount of displacement of the fixed scroll 16 in the radial direction.

Further, in the embodiment, the input / output control device 40 is provided outside the control unit 39, and the transmission / reception of the signal with each of the feed devices 35 and the micrometer 37 is performed by the external input / output control device.
It was described as being performed via 40 etc., but instead of this,
The input / output control device 40 may be formed into an electronic board and stored in the control unit 39.

Further, in the above embodiment, the case where the positioning device is used for positioning the fixed scroll of the scroll type air compressor has been described as an example, but the present invention is not limited to this, and the scroll type vacuum pump, the oil-cooled type Needless to say, the present invention can also be applied to positioning of other scroll fluid machines such as the above scroll fluid machine.

〔The invention's effect〕

As described above in detail, according to the present invention, a fixed base for fixing a casing in a state in which a fixed scroll is freely combined with a casing incorporating a revolving scroll, and a predetermined interval in a circumferential direction of the fixed scroll are provided. A plurality of displacement amount detecting means for detecting a radial displacement amount of the fixed scroll when the orbiting scroll is turned, and a predetermined interval in a circumferential direction of the fixed scroll so as not to push the fixed scroll in the radial direction. And a plurality of adjusting means for adjusting the position of the fixed scroll with respect to the orbiting scroll. The adjusting means is driven based on the displacement of the fixed scroll detected by each of the displacement detecting means, and the fixed scroll is casing. And the orbiting scroll, so that the fixed scroll is The amount of displacement of the fixed scroll in the radial direction can be detected, and by driving each adjusting means based on the amount of displacement, the fixed scroll can be automatically positioned with respect to the casing and the orbiting scroll. Thus, the productivity can be improved, and the reliability and performance can be greatly improved.

[Brief description of the drawings]

1 to 7 show an embodiment of the present invention. FIG. 1 is an overall system diagram of a positioning device of a scroll fluid machine,
FIG. 2 is a flowchart showing a positioning control process of the fixed scroll, FIG. 3 is a longitudinal sectional view of a scroll compressor showing a state where the fixed scroll is combined with a casing incorporating the orbiting scroll, and FIG. 4 is a main part of the positioning device. FIG. 5 is an enlarged longitudinal sectional view of FIG. 5, and FIG.
Explanatory drawing showing a state where a micrometer is in contact, FIG.
FIG. 7 is an explanatory view showing a state in which the fixed scroll is slightly orbiting, and FIGS. 7A and 7B are enlarged views showing different adjustment states of the orbiting scroll wrap and the fixed scroll wrap. FIG. 8 is a longitudinal sectional view of a scroll compressor showing a conventional technique. 1 ... casing, 10 ... orbiting scroll, 12 ... head plate, 13 ... lap part, 15 ... compression chamber (closed space), 16 ...
… Fixed scroll, 17… End plate, 18… Wrap, 31…
… Fixed base, 35… feeder (adjustment means), 37… micrometer (displacement amount detection means), 39… control unit.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F04C 18/02 311

Claims (1)

(57) [Claims] 1. A casing, a revolving scroll provided rotatably in the casing, and a spiral wrap portion standing upright on a head plate, and fixed to the casing in opposition to the revolving through-roll and fixed to the head plate. In a scroll fluid machine having a fixed scroll in which a spiral wrap portion that overlaps with a wrap portion of an orbiting scroll and forms a closed space is provided upright, the fixed scroll can be freely set in a casing incorporating the orbiting scroll. A fixed base for fixing the casing in a combined state, and a plurality of displacements disposed at predetermined intervals in a circumferential direction of the fixed scroll, and detecting a radial displacement of the fixed scroll when the orbiting scroll is turned. Detecting means, and a predetermined interval in a circumferential direction of the fixed scroll for pushing the fixed scroll in a radial direction. , And a plurality of adjusting means for adjusting the position of the fixed scroll against the orbiting scroll,
The scroll fluid machine according to claim 1, wherein the adjusting means is driven based on the displacement amount of the fixed scroll detected by the displacement amount detecting means, and the fixed scroll is positioned with respect to the casing and the orbiting scroll. Positioning device.