JPS6282285A - Muffler for compressor - Google Patents

Abstract

PURPOSE:To improve airtightness of a muffler, by furnishing a curve projected to the cylinder side at the contact surface of a steel plate and a curve in the same direction as that of the steel plate with a smaller bending size at the contact surface of a steel cover of a muffler, and soldering all the periphery of the both contact surfaces. CONSTITUTION:In the manufacture of this muffler 11, at the contact surface 16 of a steel plate 14 is formed a curve projected to the side of installing surface 25 to the cylinder, with a bending size C, and at the contact surface 17 of a steel cover 15 is furnished a curve with a bending size D smaller than the bending size C. The plate 14 and the cover 15 are pressed in the directions of arrows until a gap formed between the contact surfaces 16 and 17 exists no more, and the point x is spot-welded to position the plate 14 and the cover 15 while they are closely contacted. Finally all the periphery between the contact surfaces 16 and 17 is soldered to form the muffler 11. Therefore, the sealing is improved and a highly airtight muffler 11 can be formed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of industrial application The present invention relates to a silencer for a compressor, and in particular, the present invention relates to a silencer for a compressor, and in particular, to a noise reduction device for a compressor, the present invention relates to a noise reduction device for a compressor, and in particular, to a noise reduction device for a compressor. The present invention relates to a muffling device for a compressor, comprising a muffler formed by joining at a joint surface.

(B) Conventional technology Conventionally, this type of compressor muffling device was developed in Japanese Patent Application Laid-Open No. 59-43.
It was disclosed in Japanese Patent No. 990, etc., and was configured as shown in FIGS. 7 to 9. To explain below, Gυ is a discharge silencer formed by joining a press-cut steel plate 03 and a press-drawn steel plate cover (G) by brazing at their respective joint surfaces. It is. This muffler is attached to the cylinder with a pole C10) so that the steel plate 0 is on the cylinder (end) side. This muffler is manufactured by the following method. First, a steel plate with a thickness of about 21 mm is punched out to form a steel plate plate 04 (at this time, the joining surface of the plate is attached to the cylinder as shown in Figure 8). A warp is given so that the side is convex.Next, a steel plate with a thickness of about 0.5W1 is press-drawn to form a steel plate cover Q.At this time, the cover is joined. As shown in the same figure, plate 3 is also applied to the side (G).
1, which gives a warpage of a warpage dimension B that is approximately equal to the warpage dimension A of
After these plates (32 and cover@) are fitted together at their respective joint surfaces, the portions marked with X in the figure are spot welded and positioned. Finally, the silencer 6υ is formed by brazing the entire circumference between the joint surfaces 04)c(!i) of the plate (to) and the cover (to).

The muffler r31) configured in this manner has a warp given in advance to the plate plate and the cover plate to increase the adhesion between the central part of the mounting surface (2) of the plate C33 and the end face of the cylinder (to). It is something.

(C) Problems to be Solved by the Invention However, according to the above configuration, the warpage imparted in advance to the respective joint surfaces C341C3S of the plate 04 and the cover (to) is set to approximately the same warp size, so that the warpage does not occur. Due to variations within the dimensional tolerances, when the plate C3a and the cover are stacked together, the joint surfaces (34) (g)
A gap is likely to occur between the plates, especially when the warp dimension A of plate 04
When the warp dimension B of the cover (to) becomes larger, a large gap G9 is created at the end of each joint surface c (4) (g) as shown in Fig. 9, and this gap is made airtight by brazing. There was a problem in that it became difficult to join the muffler to the muffler and the airtightness of the muffler 3υ deteriorated.

The present invention was made in view of the above, and an object of the present invention is to provide a muffler with less leakage by increasing airtightness at the joint surface between a steel plate and a steel plate cover.

B) Means for Solving the Problems The present invention provides a silencer formed by joining a press-pull steel plate and a press-drawn steel plate cover at their joint surfaces. In the compressor that is attached to the cylinder on the side, the muffler is provided with a warp that is convex toward the cylinder side on the joint surface of the steel plate, and the steel plate on the joint surface of the taste board cover. The plate has a curvature in the same direction as the curvature of the plate, but with a smaller dimension than the curvature of the plate.

(E) Function The compressor silencer of the present invention has the above-described structure, and when the steel plate plate and @& cover are overlapped at their joint surfaces, a gap is formed in the middle between the joint surfaces. Then, during the next process of positioning by spot welding, the plate and cover are pressed together so that the gap is eliminated, so that the joint surfaces are in close contact all the way around, and the spaces between all joint surfaces are filled with brazing material. This improves the airtightness of the silencer.

(f) Example Embodiments of the present invention will be described below based on the drawings.

(1) houses the compressor part (3) in the upper part and the electric motor part (4) in the lower part in the sealed case (2), and both the rock parts (3) (
This is a hermetic electric compressor constructed by connecting the compressors 41 to 41 with a rotating shaft (5).

The compressor section (3) includes a cylinder (6) and a piston (force) that reciprocates within the cylinder.
A valve seat plate (8) that closes the opening end surface of the cylinder (6) via this valve seat plate and a gasket (9)
It consists of a discharge silencer qυ made of steel plate attached by α, and an intake silencer (I:1) attached to the earthen wall of the cylinder (6) by a pole Q5.The discharge silencer αυ is It is formed by joining a press-pull steel plate I and a press-drawn steel plate cover a9 by brazing at their joint surfaces +tH1.

QEoff9 (2I is the three muffling chambers provided in the muffler, Ql) @ is the throttle passage that communicates the muffling chambers, ■ is the inlet hole, (2 is the discharge pipe. This muffler is made of steel plate. The plate a4) is attached to the cylinder (6) with the bolts 00 so as to face the cylinder (6).

This silencer is manufactured in the following manner. First, a steel plate (14) with a thickness of approximately 2 sheets is punched out using a press. A warp of warp dimension C is given so that it is convex on the side of the mounting plate.Next, a steel plate with a thickness of about 0.5 mm is press-drawn to form a steel plate cover (15).

At this time, a plate (14) is provided on the joint surface αη of the cover.
A warpage with a warpage dimension smaller than the warpage dimension C is given. And these plates (14) cover fl! 19
As shown in Figure 6, overlap each other at their joint surfaces (161 (17)).

Here, since the warpage dimension of the joint surface (tη) is smaller than the warp dimension C of the joint surface (16), a gap as shown in the figure is formed between the two joint surfaces (161G71). Play) Press (14) and the steel plate cover (151) in the direction shown by the arrow in the same figure until the gap (4) disappears (Play) While bringing (14) and cover 09 into close contact, press X in Figure 4. The parts indicated by marks are spot welded to position and fix.Finally, the joint surface (161aD) between play (141) and cover 09 is brazed all around to form a silencer (lυ).

The discharge muffler Q11 configured in this way is made of a steel sheet plate (14) and a steel plate cover IX9 with a warp that is convex toward the cylinder (6) side. Attachment to the cylinder (6) using bolts αα is sometimes done so that the adhesiveness between the central part of the mounting surface (G) of the plate 04) and the gasket (9) is further enhanced. Furthermore, in this silencer, the warp dimension of the cover 09 is thicker than the warp dimension C of the play H141.
Due to the pressing force during spot welding described above, both joint surfaces (1
61C1,) can be brought into close contact over the entire circumference, and the gap between the bonding surfaces 06)aη is almost eliminated, so that the entire circumference between the bonding surfaces can be filled airtight with brazing material.

In addition, according to the discharge silencer αυ of this embodiment, leak tests have shown that the leakage failure rate at the joint surface HCl7)K between the steel plate n4) and the steel plate cover a9 can be significantly reduced compared to the conventional method. confirmed.

(g) Effects of the invention As described above, the present invention provides a silencer formed by joining a press-cut steel plate and a press-drawn steel plate cover at their joint surfaces. In the compressor that is attached to the cylinder on the plate side, the silencer is provided with a warp that is convex toward the cylinder side on the joint surface of the steel plate, and the steel plate is attached on the joint surface of the steel plate cover. Since the curvature is in the same direction as the curvature of the plate and has a smaller dimension than the curvature of the plate, the mounting of the muffler on the cylinder increases the adhesion between the plate and the cylinder as before. At the same time, when positioning and fixing the plate and cover, the joint surfaces can be brought into close contact over the entire circumference, and the brazing of the joint surfaces improves the sealing performance and provides a highly airtight muffler. .

[Brief explanation of drawings]

1 to 6 show embodiments of the present invention, FIG. 1 is a longitudinal cross-sectional view of a hermetic electric compressor, FIG. 2 is a cross-sectional view of the hermetic electric compressor, and FIG. 3 is a discharge Front view of silencer, 4th
The figure is also a plan view of the discharge silencer, Figure 5 is an exploded plan view of the discharge silencer, Figure 6 is a plan view of the discharge silencer showing the state in which the steel plate and the steel plate cover are overlapped, and Figure 7 Figures 9 to 9 show conventional examples, Figure 7 is a cutaway sectional view of the main parts of a hermetic electric compressor, Figure 8 is an exploded plan view of a discharge silencer, and Figure 9 shows a steel plate plate and a steel plate cover. FIG. 3 is a plan view of the discharge muffler showing a fixedly positioned state. (1)...Hermetic electric compressor, (6)...Cylinder, (10)...Bolt, αυ...Discharge silencer,
(14)...Steel plate plate, d9...Steel plate cover, (16)(17)...Joint surface.

Claims (1)

[Claims] (1) In a compressor in which a silencer formed by joining a press-cut steel plate and a press-drawn steel plate cover at their joint surfaces is attached to a cylinder on the steel plate side, In the silencer, the joining surface of the steel plate plate is provided with a curvature that is convex toward the cylinder side, while the joining surface of the steel plate cover is provided with a curvature that is in the same direction as the curvature of the steel plate plate and has a curvature dimension of the plate. A noise reduction device for a compressor, characterized in that a warp of smaller dimensions is provided.