KR19980071383A - Reciprocating Compressor - Google Patents

Abstract

The compressor is left without a flash or the like remaining in the valve portion of the discharge lead valve 18 or a gap between the discharge lead valve 18 or the suction lead valve 15 and the valve plate 13. An object of the present invention is to provide a reciprocating compressor that can maintain a compression efficiency.

A plurality of dols 20 for positioning the discharge lead valve 18 at a predetermined position are provided inside the annular bulkhead 21 formed at the center of the cylinder covers 10 and 11. do.

Description

Reciprocating Compressor

The present invention relates to a reciprocating compressor used in a vehicle air conditioner.

BACKGROUND ART As a compressor used in a vehicle air conditioner, a reciprocating compressor called an inclined plate type is known from the prior art.

This inclined plate compressor has a plurality of bores formed on the periphery of a cylinder block, as proposed in Japanese Patent Laid-Open No. 59-113278, and is compressed by pistons installed in these bores. It is intended to compress the fluid.

In addition, a drive shaft is rotatably provided at the center of the cylinder block, and the piston reciprocates in the bore by rotation of a cam plate (inclined plate) attached to the drive shaft.

However, such an inclined plate type compressor has a cylinder cover for closing the bore of the cylinder block, and a valve plate is provided between the cylinder cover and the cylinder block.

The valve plate is provided with a plurality of suction ports and discharge ports. Among these ports, the suction ports are opened and closed by a suction lead valve mounted between the valve plate and the cylinder block. It is opened and closed by a discharge lead valve mounted between the valve plate and the cylinder cover.

Therefore, when assembling such an inclined plate type compressor, it is necessary to position the discharge lead valve placed on the valve plate, and conventionally, as shown in FIG. 5, a plurality of holes 52 are provided in the discharge lead valve 51. The dowels or pins protruding from the valve plate are engaged with these hole portions 52 to position the discharge lead valve 51 at a predetermined position.

However, in the above-described prior art, since the hole 52 for positioning is formed between the valve portion 51a and the valve portion 51a of the discharge lead valve 51, the valve portion of the discharge lead valve 51 is discharged. In the case of barrel polishing 51a, the hole 52 is hindered and the root portion of the valve portion 51a cannot be barrel-polished.

For this reason, when the discharge lead valve 51 is press-molded, the flash etc. may remain in the root part of the valve part 51a, and the flash etc. remain in the root part of the valve part 51a. Since cracks and the like are likely to occur in the root portion of the valve portion 51a, it is necessary to reduce the grinding wheel for grinding the barrel in the past and it takes time to manufacture the discharge lead valve 51.

In addition, conventionally, a dowel or pin for positioning provided on the valve plate is provided outside the annular bulkhead portion formed in the center portion of the cylinder cover (after all, in the discharge chamber of the cylinder cover), and is also located near the valve portion 51a. For example, if a deformation occurs when the dowel is press-formed onto the valve plate or a deformation occurs when the pin is pressed into the valve plate, the discharge lead valve or the suction lead valve may be removed from the valve plate. It is in a rising state.

As a result, a gap is generated between the discharge lead valve, the suction lead valve and the valve plate, and in particular, the rise of the suction lead valve causes leakage of the compressed fluid from this gap between the bores. There was concern.

The problem to be solved by the invention of claim 1 is to provide a reciprocating compressor capable of positioning the discharge lead valve at a predetermined position without leaving a flash or the like remaining in the valve portion of the discharge lead valve. .

In addition, the problem to be solved by the invention described in claim 2 provides a reciprocating compressor which can maintain the compression efficiency of the compressor in addition to the above problem without generating a gap between the discharge lead valve and the like. It is.

1 is a cross-sectional view of a reciprocating compressor according to an embodiment of the present invention.

Fig. 2 is a sectional view showing a part of the reciprocating compressor according to the embodiment.

3 is a cross-sectional view taken along the line A-A of FIG.

4 is a plan view of a discharge lead valve in the reciprocating compressor according to the embodiment;

5 is a plan view of a discharge lead valve in a conventional reciprocating compressor.

(Explanation of symbols for the main parts of the drawing)

1. Cylinder block on the front side

2. Back cylinder block

3. Drive shaft

5. Cam Plate

7. Bore

8. Piston

10. Front cylinder cover

11. Rear cylinder cover

13. Valve Plate

14. Suction port

15. Suction Lead Valve

17. Discharge port

18. Lead valve for discharge

20. Dowel

21. Annular bulkhead

22. Holes

As a means for solving the above problems, the invention described in claim 1 includes a cylinder block having a plurality of bores in a periphery, a drive shaft rotatably installed at the center of the cylinder block, a cam plate mounted on the drive shaft, and rotation of the cam plate. A central portion of the plurality of pistons reciprocating in the bore, a cylinder cover for blocking the bore, a valve plate provided between the cylinder cover and the cylinder block, and a plurality of valve portions for opening and closing the discharge port formed in the valve plate. In a reciprocating compressor having a plurality of dowels or pins for engaging a positioning hole formed in the discharge lead valve provided at the circumferential edge of the cylinder and the discharge lead valve provided at the valve plate. It is characterized in that formed in the center of the lead valve for.

The invention described in claim 2 further includes a cylinder block having a plurality of bores at its periphery, a drive shaft rotatably installed at the center of the cylinder block, a cam plate attached to the drive shaft, and rotation of the cam plate. A plurality of reciprocating pistons, a cylinder cover for blocking the bore, a valve plate provided between the cylinder cover and the cylinder block, and a discharge lead valve for opening and closing the plurality of discharge ports formed in the valve plate and the discharge plate installed in the valve plate. A reciprocating compressor comprising a plurality of dowels or pins for positioning a lead valve for a predetermined position and an annular partition wall portion formed at the center of the cylinder cover and pressing the center portion of the discharge lead valve to the valve plate. Dowels or pins are provided inside the annular partition wall portion.

In the invention according to claim 1, since the positioning hole is not obstructed when barrel polishing the valve portion of the discharge lead valve, the root portion of the valve portion can be barrel-polished reliably. Can be positioned at a predetermined position without leaving any of

In the invention according to claim 2, since the hole for positioning that engages the dowel or the pin does not have to be formed between the valve portion and the valve portion of the discharge lead valve, the root portion of the valve portion can be reliably barrel-polished.

In addition, even if the deformation of the dowel is press-formed into the valve plate or the deformation of the pin when the pin is pushed into the valve plate, the discharge lead valve or the suction lead valve is provided by the annular bulkhead of the cylinder cover. Since the pressure does not rise from the valve plate, the compression efficiency of the compressor can be maintained with high efficiency without generating a gap between the discharge lead valve or the suction lead valve and the valve plate.

(Example)

Next, an embodiment of the present invention will be described with reference to FIGS.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a sectional view of a reciprocating compressor according to an embodiment of the present invention. In the drawings, reference numeral 1 denotes a front cylinder block of a reciprocating compressor according to the embodiment, and 2 a front cylinder block 1 The rear cylinder block joined to the rear end surface of the figure is shown.

The front cylinder block 1 and the rear cylinder block 2 are made of aluminum or aluminum alloy, and the drive shaft 3 is rotatably installed at the center of the cylinder blocks 1, 2.

The drive shaft (3) is freely supported by a pair of radial bearings (4) and (4) for rotation, and a cam plate (5) made of aluminum or an aluminum alloy in the axial center portion of the drive shaft (3). ) Is installed.

The cam plate 5 has a boss portion 5a at its center portion, and a pair of front and rear thrust bearings are formed between both ends of the boss portion 5a and the cylinder blocks 1 and 2. ng) 6 and 6 are provided.

The cam plate 5 has a circular inclined plate portion 5b on the outer circumference of the boss portion 5a.

The inclined plate portion 5b is formed integrally with the boss portion 5a and is inclined with respect to the drive shaft 3.

On the other hand, a plurality of bores 7 (only one is shown in the figure) are formed in the periphery of the front cylinder block 1 and the rear cylinder block 2.

These bores 7 are formed at substantially equal intervals on the same circumferential surface around the drive shaft 3, and in each bore 7, a double headed piston 8 made of aluminum or an aluminum alloy is used for sliding movement. It is freely received.

The piston 8 has a front side compression portion 8a for compressing the compressed fluid sucked in the bore 7 of the front cylinder block 1 and a compressed side sucked in the bore 7 of the rear cylinder block 2. A rear side compression section 8b for compressing the fluid is provided at both ends, and a pair of front and rear inclination plate mooring sections 8c and 8c are provided between the front side compression section 8a and the rear side compression section 8b. It is installed.

These inclined plate mooring portions 8c and 8c each have a spherical shoe holder 8d, and the shoe holder 8d slides the inclined plate portion 5b of the cam plate 5 on the shoe holder 8d. Hemispherical shoes 9 and 9 are engaged.

On the front face of the front cylinder block (1) and the rear face of the rear cylinder block (2), the front cylinder cover (10) and the rear cylinder cover (11) are the front cylinder block (1) and the rear cylinder block. (2) It is joined by the some bolt 12 which penetrates inside.

These cylinder covers 10 and 11 are made of aluminum or an aluminum alloy, and the front and rear pairs of valve plates 13, between the cylinder blocks 1, 2 and the cylinder covers 10, 11, (13) is interposed.

Fig. 2 is a sectional view showing a part of the reciprocating compressor according to the embodiment, and Fig. 3 is a sectional view taken along the line AA of Fig. 2 and shown in Fig. 2 as a front and rear pair of valve plates 13 and 13 and the front surface thereof. Between the side cylinder block 1 and the rear cylinder block 2, a suction lead valve 15 and a gasket 16 for opening and closing a plurality of suction ports 14 formed in the valve plate 13 are provided. It is installed.

The suction lead valve 15 is formed by pressing a metal plate into a predetermined shape and positioned at a predetermined position by a plurality of pins protruding from the valve plate 13.

On the other hand, a discharge lead valve for opening and closing the plurality of discharge ports 17 formed in the valve plate 13 between the valve plates 13, 13, the front cylinder cover 10, and the rear cylinder cover 11; A retainer 19 for restricting the opening degree of the lead valve 18 and the copper valve 18 is provided.

As shown in Fig. 4, the discharge lead valve 18 has a plurality of valve portions 18b on the outer circumference of the circular center portion 18a, and these discharge portions 17 of the valve plate 13 are provided with the valve portions 18b. It is a structure which opens and closes.

The circular center portion 18a of the discharge lead valve 18 is pressed against the center portion of the valve plate 13 by the annular partition wall portion 21 formed at the center portion of the cylinder covers 10 and 11.

In addition, the discharge lead valve 18 is formed by pressing a metal plate in the same shape as the suction lead valve 15, and as shown in Fig. 2, by a plurality of dowels 20 formed on the valve plate 13. It is positioned at a predetermined position.

These dowels 20 are formed inside the annular bulkhead 21 formed in the center of the cylinder covers 10 and 11, as shown in Fig. 3, and the circular center portion 18a of the discharge lead valve 18 is shown. ) Is formed with a plurality of holes 22 engaged with the dowel 20.

Further, an annular discharge chamber 23 is formed outside the annular partition wall portion 21, and a suction chamber 24 is formed on the outer circumferential side of the discharge chamber 23.

In the above-described one embodiment, since the hole 22 for positioning is formed in the circular center portion 18a of the discharge lead valve 18, barrel polishing of the valve portion 18b of the discharge lead valve 18 is performed. In this case, the hole 22 is not obstructed.

Therefore, the flash or the like generated at the root portion of the valve portion 18b can be reliably removed by barrel polishing using a relatively large grindstone, which shortens the manufacturing process and at the same time the valve portion 18b of the discharge lead valve 18. ), The discharge lead valve 18 can be positioned at a predetermined position without leaving a flash or the like.

Moreover, in the above-mentioned embodiment, since the positioning dowel 20 is formed inside the annular partition wall part 21, the deformation | transformation at the time of press molding the dowel 20 also in the peripheral part of the dowel 20 is carried out. The discharge lead valve 18 and the suction lead valve 15 do not float from the valve plate 13.

Therefore, the gap between the discharge lead valve 18 or the suction lead valve 15 and the valve plate 13 does not occur, and in particular, each bore 7 of the compressed fluid caused by the rise of the suction lead valve. The leakage of the liver can be eliminated and the compression efficiency of the compressor can be maintained at high efficiency.

In addition, although the above-mentioned embodiment demonstrated the reciprocating compressor of the type which performs the positioning of the discharge lead valve 18 by the several dowel 20 formed in the valve plate 13, the discharge lead valve 18 The same effect can be obtained also with respect to the reciprocating compressor of the type which performs positioning of the position by the several pin provided in the valve plate 13. As shown in FIG.

In addition, in the above-mentioned embodiment, although the dowel 20 was used as a positioning means of the discharge lead valve 18, a rivet may be used instead of the dowel 20. FIG.

Again, in the above embodiment, the reciprocating compressor of the inclined plate type has been described, but it is also applicable to the reciprocating compressor other than the inclined plate type.

As described above, according to the invention of claim 1, the discharge lead valve can be positioned at a predetermined position without leaving a flash or the like remaining in the valve portion of the discharge lead valve.

According to the invention of claim 2, in addition to the above-described effects, the compression efficiency of the compressor can be maintained with high efficiency without generating a gap between the discharge lead valve, the suction lead valve and the valve plate.

Claims (2)

Cylinder blocks (1) and (2) having a plurality of bores (7) in the periphery, and a drive shaft (3) rotatably installed in the center of the cylinder blocks (1) and (2) and mounted on the drive shaft (3). The cam cover 5 and the plurality of pistons 8 reciprocating in the above-mentioned bore 7 by the rotation of the cam plate 5 and the cylinder covers 10 and 11 which close the bore 7 are closed. ) And a plurality of valve plates 13 disposed between the cylinder covers 10 and 11 and the cylinder blocks 1 and 2 and the discharge port 17 formed in the valve plate 13. A plurality of dowels 20 for engaging the positioning hole 21 formed in the discharge lead valve 18 provided in the valve plate 13 and the discharge lead valve 18 having the valve portion at the circumferential edge of the center portion. Or a pin-type reciprocating compressor, in which a hole 22 for positioning is formed in the center of the discharge lead valve 18. Reciprocating compressors. Cylinder blocks (1) and (2) having a plurality of bores (7) in the periphery, and a drive shaft (3) rotatably installed in the center of the cylinder blocks (1) and (2) and mounted on the drive shaft (3). The cam cover 5 and the plurality of pistons 8 reciprocating in the above-mentioned bore 7 by the rotation of the cam plate 5 and the cylinder covers 10 and 11 which close the bore 7 are closed. ) And the valve plate 13 provided between the cylinder covers 10 and 11 and the cylinder blocks 1 and 2 and the plurality of discharge ports 17 formed in the valve plate 13 to be opened and closed. A plurality of dowels 20 or pins provided in the discharge lead valve 18 and the valve plate 13 for positioning the discharge lead valve 18 at a predetermined position, and the cylinder cover 10 described above (( In the reciprocating compressor having an annular partition wall portion 21 formed in the center portion of 11) and pressing the center portion of the discharge lead valve 18 to the valve plate 13, the dowel 20 is provided. Is a reciprocating compressor which is characterized in that a pin in the inside of the annular partition wall (21).