JPH03225097A - Two-cylinder rotary compressor assembling method - Google Patents

Abstract

PURPOSE:To improve assembling accuracy without the assembling accuracy of each part being affected by that of other parts by aligning and assembling each part successively on the basis of a shaft. CONSTITUTION:A first roller 10 is fitted at the eccentric part 8 of a shaft 2, and the inner periphery of a first cylinder 6 is fitted into a position on the maximum peripheral orbit of the first roller 10, securing a clearance with the first roller 10. A first bearing 12 is fitted concentrically at the shaft 2, and the first cylinder 6 and first bearing 12 are aligned and fixed by a first bolt. A middle partitioning plate 5 is inserted into the shaft 2 so as to be set at the first cylinder 6, as well as a second roller 11 is fitted at the eccentric part 9 of the shaft 2 so as to set the position of the inner periphery of a second cylinder 7. A second bearing 13 is aligned to the second cylinder 7 while rotating the shaft 2 and fixed by a third bolt. Finally, a discharge muffler 15 is fixed at the second bearing 13 by a fourth bolt.

Description

DETAILED DESCRIPTION OF THE INVENTION <<A>> Industrial Application Field 4: The invention relates to an improvement in a method for assembling a two-cylinder rotary compressor.

《Convention》Prior art A conventional method of assembling a two-cylinder rotary compressor is as shown in, for example, Japanese Patent Laid-Open No. 63-205486. Here, a conventional example will be explained with reference to 4. Publication. 7 to 10, 50 is an airtight container, 51 is an electric element composed of a stator 52 and a rotor 53 provided on the upper side of the airtight container 50, and 54 is an electric element provided on the lower side of the airtight container 50. A compression element is provided.

A first cylinder 56 and a second cylinder 57 are attached to the compression element 54 on both sides with an intermediate partition plate 55 in between.

A first bearing 58 is attached to the upper part of the first cylinder 56 disposed on the upper side, and a second bearing 59 is attached to the lower part of the second cylinder 57 disposed on the lower side. There is. Rollers 60, 61 are rotatably arranged in the first and second cylinders 56, 57, respectively.

The rollers 60, 61 in each cylinder 56, 57 and the rotor 53 of the electric element 51 are connected by a rotating shaft 62, and each performs compression operation using the rotational force generated by the electric element 51 as a driving source. .

63 is a suction pipe connected to the suction side of the first cylinder 56, 64 is a suction passage formed in the intermediate partition plate 55 and the second cylinder 57, and 65 is a discharge connected to the upper wall of the closed container 50. The tubes 66 and 67 are the first and second bearings 5
B, 59 is a discharge muffler provided, and 68.69 is a discharge valve provided in the first and second bearings 58, 59, which cause compression in the compression chambers in the first and second cylinders 56,57. The structure is such that the refrigerant can be discharged to the outside from the discharge pipe 65 through the discharge valves 6B, 6J, discharge mufflers 66, 67, and the inside of the closed container 50.

Then, the compression element 54 aligns the first bearing 58 and the first cylinder 56 and connects the discharge muffler 6 with the first bolt 70.
Similarly, the second bearing 59 and the second
After aligning the cylinder 57 and fastening it together with the discharge muffler using a temporary set screw 71, the rollers 60, 61 and the rotating shaft 62 are assembled in both, and finally the second bolt 7 with the longer shaft length is installed.
2, a structure is used in which both are connected via an intermediate partition plate 55.

4. In the method for assembling the two-cylinder rotary compressor of the structure, after aligning the first bearing 58 and the first cylinder 56 and the second bearing 59 and the second cylinder 57, a medium is inserted between these cylinders. Hold the partition plate 55 and tighten the bolt 70.
．． 72 to ensure that the compression element 54 is properly centered and installed.

<C> Problems to be Solved by the Invention However, the compression element 54 is attached to the rotating shaft 62 by aligning the first bearing 5B and the first cylinder 56 and fixing them with the bolts 70. After that, the second bearing 5
9 and the second cylinder 57, temporarily fasten them with the temporary fixing screws 71, and insert them into the rotating shaft 62. 4. While aligning the rotating shaft and the second bearing 59, The bolt 7 connects the cylinder 57 to the first cylinder 56 via the intermediate partition plate 55.
2, if there is a misalignment in the alignment accuracy between the second bearing 59 and the rotating shaft 62, there will also be variation between the second cylinder 57 and the roller 61, resulting in a problem that the assembly accuracy will be impaired. there were.

4. The invention solves the above problem, and is designed so that the accuracy of concentric alignment between the second bearing and the rotating shaft does not affect the variation in accuracy between the second cylinder and the roller. The object of the present invention is to provide a method for assembling a two-cylinder rotary compressor.

(d) Means for Solving the Problem 4. The invention includes a rotating shaft having eccentric parts whose rotation angles are shifted by 180 degrees from each other; 2, a first cylinder and a second cylinder forming a first compression chamber and a second compression chamber, respectively, around these rollers; 4, between the first and second cylinders; An intermediate partition plate sandwiched between the two rollers and the cylinder is passed through the rotating shaft so as to sandwich the overlapping roller and cylinder from the axial direction, so that the compression chamber is partitioned from the axial direction of each roller and the cylinder, and the first and second
A two-cylinder rotary compressor comprising a first bearing and a second bearing that are fixed to a cylinder and pivotally support the rotating shaft, wherein the first bearing and the first cylinder are connected to an eccentric portion of the rotating shaft. A first step of aligning and fixing the first roller to fit with the first roller with a predetermined gap, and inserting the intermediate partition plate into the first cylinder by inserting it into the rotating shaft from the axial direction. a second step of fixing the second roller and moving the second roller and the rotating shaft in the same direction after fitting the second roller to the eccentric portion of the rotating shaft; and a maximum outer peripheral orbit of the second roller. a third step of measuring a plurality of points on the maximum outer orbit, and a fourth step of calculating an alignment position of the second cylinder with respect to the plurality of points on the maximum outer circumferential orbit, and moving and fixing the second cylinder to that position. and a fifth step of fixing the second bearing to the second cylinder while aligning it with the rotating shaft.

(e) Effect 4: By configuring the invention as described above, each part is assembled while being aligned with the rotating shaft, and variations in the assembly precision between the part and the rotating shaft are avoided compared to other parts. This is done so that the assembly accuracy is not affected and the assembly accuracy of the compression element is not impaired.

I will clarify.

Reference numeral 1 denotes a closed container, and 4, an electric element 3 having a rotating shaft 2 on the upper side, and a rotary compression element 4, which can be driven by the electric element, are housed on the lower side. The rotary compression element 4 includes an intermediate partition plate 5, 4, first and second cylinders 6.7 attached above and below the partition plate, and a rotary shaft 2 having a diameter of 180 mm.
Eccentric parts 8 and 9 provided with rotation angles shifted by °, first and second rollers 10 and 11 that rotate in the cylinders by these eccentric parts, and first and second cylinders 6 and 7, respectively. A first bearing 12 and a second bearing 13 that seal the opening of the
and discharge mufflers 14 and 15 provided on these first and second bearings, respectively.

16 is an accumulator provided outside the sealed container 1, 4, a case body 17 of the accumulator, 4, an inflow pipe 18 attached to the upper part of the case body, and two suction pipes 19 attached to the lower part. 20. One suction pipe 19 communicates with the first cylinder 6 on the upper side, and the other suction pipe 20 communicates with the second cylinder 7 on the lower side.

21 is a discharge pipe attached to the earthen wall of the closed container 1.

4. In the method of assembling a two-cylinder rotary compressor configured as shown in FIG. 4, the order of assembling the rotary compression element 4 will be explained. First, the first roller 10 is fitted to the eccentric portion 8 of the rotating shaft 2, and the inner periphery of the first cylinder 6 is placed on the orbit of the maximum outer periphery of the first roller. 10, and align the first bearing 12 so that it aligns with the rotating shaft 2,
The first cylinder 6 and the first bearing 12 are aligned and
It is fixed at Porto 22. Next, the intermediate partition plate 5 is inserted into the rotating shaft 2 and set in the first cylinder 6, and the second roller 11 is fitted into the eccentric portion 9 of the rotating shaft 2, and the maximum outer circumference of the second roller 11 is set. 4. Press the second roller from the point toward the center of the rotating shaft 2 to connect the rotating shaft 2 and the second roller.
4. The position of the maximum outer circumference of the 20th roller on the orbit is measured, and the position of the inner circumference of the second cylinder 7 is set. The second cylinder 7 is set at a predetermined position and fixed to the first cylinder 6 with a second bolt 23 that fixes the discharge muffler 14 provided on the first bearing 12.

The second bearing 13 is aligned with the second cylinder 7 while rotating the rotary shaft 2, and is fixed with a third bolt 24. After that, attach the discharge muffler 15 to the second bearing 13 with the fourth bolt 2.
5 and the rotary compression element 4 is assembled.

The second roller 11 measures the position of the maximum outer periphery of the roller at three points on the orbit using light reflected from the intermediate partition plate 5 irradiated with a light source from the direction in which the second bearing 13 is installed. It has been measured. Further, the inner circumferential position of the second cylinder 7 is set by measuring the outer circumference of the second roller 11, and the second cylinder 7 can be set at the set position. 4. At this time, the position of the second roller 11 is rotated by 30 degrees or more, or the second roller 11 is removed from the rotating shaft 2 so that the inner peripheral position of the second cylinder 7 is exposed to the reflected light from the light source irradiation. This makes it easier to detect the location.

The first and second cylinders 6.7 are individually aligned with respect to the rotating shaft 2, so that the assembly accuracy of the rotary compression element 4 is not influenced by other parts.

4. Since the invention aligns and assembles the first bearing 12, first cylinder 6, second cylinder 7, and second bearing 13 in sequence, the assembly accuracy of each component is not affected by each other. It is designed to be assembled.

(G) Effects of the Invention As described above, according to the invention, the first bearing and the first cylinder are fitted with a predetermined gap from the first roller fitted to the eccentric portion of the rotating shaft. The first step is aligning and fixing the intermediate partition plate to the first cylinder by inserting it into the rotating shaft from the axial direction, and fitting the second roller to the eccentric part of the rotating shaft. After aligning, a second step of moving the second roller and the rotating shaft in the same direction, and a third step of measuring a plurality of points on the trajectory of the maximum outer circumference of the second "l-ra". , the alignment position of the second cylinder is calculated with respect to a plurality of points on the trajectory of the maximum outer circumference, and the alignment position of the second cylinder is calculated at that position.
a fourth step of moving and fixing the cylinder; and a fourth step of moving and fixing the second cylinder.
Since the assembly involves the fifth step of fixing the second bearing while aligning the rotating shaft and alignment to the cylinder, each part can be aligned and assembled in sequence with the rotating shaft as a reference.
The assembly precision of each component is not affected by the assembly precision of other components, and the assembly precision can be improved.

[Brief explanation of drawings]

Fig. 1 is a vertical sectional view of a two-cylinder rotary compressor showing an embodiment of the invention, and Fig.
A cross-sectional view of the bearing and the first cylinder aligned and fixed;
FIG. 3 is a sectional view of the first cylinder incorporating the intermediate partition plate and the second roller, FIG. 4 is a sectional view of the second cylinder aligned and fixed to the first cylinder, and FIG. 5
The figure is a cross-sectional view of the second cylinder with the second bearing aligned with the rotating shaft and fixed, and Figure 6 shows the second cylinder set with the second roller shifted. FIG. 7 is a plan view of a conventional example, FIG. 4 is a cross-sectional view of a rotating shaft with a first bearing and a first cylinder installed, and FIG. 10 is a second bearing and a second cylinder. FIG. 2...Rotating shaft, 5...Intermediate partition plate, 6...
・First cylinder, 7...Second cylinder, (8
, 9... Eccentric part, 10... First roller, 1
1... Second roller, 12... First bearing,
13...Second bearing.

Claims (1)

[Scope of Claims] 1. A rotating shaft having eccentric parts that are rotated 180 degrees apart from each other, a first roller and a second roller that are respectively fitted to the eccentric parts of this rotating shaft, and these rollers. a first cylinder and a second cylinder for forming a first compression chamber and a second compression chamber, respectively, around the periphery of the cylinder, and an intermediate partition plate sandwiched between the first and second cylinders; A rotary shaft passes through the superimposed rollers and cylinders so as to sandwich them in the axial direction, and partitions the compression chamber from the axial direction of each roller and cylinder, and is fixed to the first and second cylinders. A two-cylinder rotary compressor comprising a first bearing and a second bearing that pivotally support the rotating shaft, wherein the first bearing and the first cylinder are fitted into an eccentric portion of the rotating shaft. A first step of aligning and fixing the intermediate partition plate so that it fits with a predetermined gap from the roller, and a second step of fixing the intermediate partition plate to the first cylinder by inserting it into the rotating shaft from the axial direction. a second step of moving the second roller and the rotating shaft in the same direction after fitting the roller to the eccentric portion of the rotating shaft; and a second step of moving the second roller and the rotating shaft in the same direction; A third step of measuring, and a fourth step of calculating the alignment position of the second cylinder with respect to multiple points on the trajectory of the maximum outer circumference, and moving and fixing the second cylinder to that position. and a fifth step of fixing a second bearing to the second cylinder while aligning it with the rotating shaft. 2. The method for assembling a two-cylinder rotary compressor according to claim 1, characterized in that the movement of the second cylinder to a predetermined position is detected by irradiating a light source from the direction in which the second bearing is mounted. . 3. Detection of movement of the second cylinder to a predetermined position after calculating or setting the alignment position of the second cylinder,
2. The method of assembling a two-cylinder rotary compressor according to claim 1, wherein the second roller is removed from the rotating shaft and the second roller is irradiated with a light source from the direction in which the second bearing is mounted. 4. Detection of movement of the second cylinder to a predetermined position after calculating or setting the alignment position of the second cylinder,
2. The method of assembling a two-cylinder rotary compressor according to claim 1, wherein the second roller is rotated by 30 degrees or more and the second roller is irradiated with a light source from the direction in which the second bearing is mounted.