JPH0530491U - Compressor - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] To provide a simplified lubrication mechanism for the side block and rotor. [Structure] The front side block 3 is provided with a lubrication hole 24 in the high pressure section of the back pressure adjusting device 22 and a drive shaft hole 2 respectively.
The opening is in a point symmetrical position with 0 as the center. The lubrication hole communicates with the communication hole 24a as shown by the dotted line, and the lower end thereof opens to the oil reservoir of the high pressure chamber. Therefore, the high-pressure lubricating oil is guided to the sliding surface 3a of the front side block through the lubricating hole 24. In this lubrication hole,
A communicating lubricating groove 25 is formed on the sliding surface 3a of the side block 3 by casting. The lubricating groove 25 is bent in a V shape, but is not limited to this and may have various shapes. The sliding surface 3a has a flow passage hole 26 for the discharge fluid,
An O-ring insertion hole and a bolt insertion hole 28 are formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention mainly relates to a compressor used for compressing a refrigerant.

[0002]

[Prior Art]

 A vane type compressor, in which a rotor having multiple vanes in the radial direction is rotatably arranged in a cylinder block of a desired shape and side blocks are installed on both sides of the cylinder block and the rotor, Grooves and holes are formed in the rotor and side blocks for the purpose of lubricating the sliding with the block and for supplying a desired back pressure for pushing the vanes provided on the rotor outward.

As for lubrication of the sliding surface, oil supply holes 21a, 21b and 22a, 22b are provided on the side block side, as shown in FIG. 4 of Japanese Utility Model Laid-Open No. 2-103190, for example. .. On the rotor side, as shown in FIG. 2 of Japanese Utility Model Laid-Open No. 2-14491, a plurality of V-shaped lubricating grooves are formed so as to sandwich the vane groove, and the lubricating oil supplied from the oil supply hole is While being stored in the lubrication groove, the sliding surface with both side blocks is reliably lubricated.

[0004]

[Problems to be solved by the device]

 The oil supply hole is drilled from the sliding surface side, and the oil supply hole is communicated with a supply path formed so as to intersect the first and second conduction holes, so that a high pressure Lubricating oil is supplied from the oil sump chamber. However, since the lubricating oil supply path thus formed is formed by forming the side block in two directions, the processing man-hours and labor are required, and the lubricating groove is formed on the rotor by hot pressing. Was.

As described above, many processes are formed on the rotor and the side blocks for lubrication, which increases the number of process steps and complicates the structure.

Therefore, the present invention has an object to review the lubricating oil supply mechanism and the back pressure mechanism to simplify the structure and reduce the number of processing steps.

[0007]

[Means for Solving the Problems]

 Therefore, the compressor of the present invention is a compressor in which a rotor having a large number of vanes in a radial direction is rotatably arranged in a cylinder block of a desired shape and side blocks are provided on both sides of the cylinder block and the rotor. In the above, one lubrication hole having a point-symmetrical drive shaft hole is opened in the sliding surface of the side block which is in surface contact with the rotor, and a lubrication groove having a desired shape communicating with the lubrication hole is formed. ..

[0008]

[Action]

 Therefore, the lubricating oil is supplied to the sliding surface of the side block from the lubrication hole formed with the drive shaft hole as point symmetry, and the lubricating oil from the lubrication hole flows into the lubrication groove and is temporarily stored and spread in the lubrication groove. The action is performed and the sliding surface with the rotor is lubricated.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

1 and 2, a compressor 1 according to the present invention comprises a cylinder block 2 having a cylinder inner peripheral surface 2a formed in a substantially elliptical shape, and a front side which closes both ends of the cylinder block 2. A block 3 and a rear side block 4 are provided, a front head 5 is provided outside the front side block 3, and a rear head 6 is provided outside the rear side block 4, which are integrated via a connecting bolt 7. Has been done.

Discharge holes 21 are formed in the cylinder block 2 at two symmetrical positions in the radial direction, and a discharge valve 23 is provided in the discharge hole 21. Further, in the cylinder block 2, a perfectly circular rotor 8 is arranged at a slight interval in a minor diameter portion in the cylinder, and the rotor 8 allows two spaces 9 a and 9 b to be formed in the cylinder 2. Are divided into symmetrical positions.

The rotor 8 is formed with a groove 11 in which a plurality of vanes 10 are arranged in the substantially radial direction. The groove 11 slides in contact with the sliding surfaces of both side blocks 3 and 4 of the rotor 8. The surface 8a is also opened, and the sliding surface 8a is not subjected to any other processing except for the central hole 14. The rotor 8 forms a compression chamber with the side blocks 3 and 4 and the vanes 10 adjacent to each other. The vane back pressure chamber 11a below the groove 11 in which the vane 10 slides has a predetermined pressure (communicating pressure) when communicating with the pressure grooves 13a and 13b of the back pressure adjusting device 22 formed on the side block 3 around the shaft as described below. The high pressure from the high pressure chamber 18 is reduced because the rotor 10 is guided from between the side block 3 and the rotor 10. The lubricating oil is supplied from between the front side block 3 and the rotor 10.

An electromagnetic clutch (not shown) is attached to the left end of the drive shaft 12 in order to obtain a driving force. The drive shaft 12 is fitted into the center hole 14 of the rotor 8, and is fitted to the front side block 3 and the rear side. It is rotatably instructed by radial bearings 15 and 16 provided on each of the side blocks 4. Both the radial bearings 15 and 16 are lubricated by a low-pressure refrigerant. The radial bearing 16 is directly provided, and the radial bearing 15 is provided from a communication hole 17 formed in the drive shaft 12.

The front head 5 is fixed to the front side block 3, and a high pressure chamber 18 is formed between the front head 5 and the front side block 5, and the high pressure chamber 18 communicates with a discharge port 19. .. An oil sump 18a is formed in the lower portion of the high pressure chamber 18, and lubricating oil is accumulated therein.

As shown in FIGS. 1 and 3, a drive shaft hole 20 into which the drive shaft 12 is inserted is formed at the center of the sliding surface 3 a of the front side block 3 with the rotor 8. Arc-shaped pressure grooves 13a and 13b are formed on the periphery thereof. The pressure grooves 13a and 13b constitute the vane back pressure chamber 11a and the back pressure adjusting device 22. The pressure grooves 13a and 13b form a locus drawn by the vane back pressure chamber 11a in the front side block 3 in the circumferential direction. Is divided into a high pressure section α and a normal pressure section β, and in the normal pressure section β, the pressure grooves 13a and 13b communicate with the back pressure chamber 11a, and a desired pressure (slightly lower than the high pressure in the high pressure chamber 18). Pressure) is supplied. Further, in the high pressure section α, the back pressure chamber 11a is separated from the pressure grooves 13a and 13b, the back pressure chamber 11a becomes an independent chamber, and the oil is confined. Therefore, the pressure is higher than that in the normal pressure section β. In the high pressure section α, the back pressure chamber 11a communicates with the lubricating groove 25 as described below.

Further, in the front side block 3, lubrication holes 24 are opened in point symmetrical positions with respect to the drive shaft hole 20 in the high pressure section of the back pressure adjusting device 22. The lubrication hole 24 communicates with the communication hole 24a as shown by the dotted line, and the lower end of the communication hole 24a opens into the oil reservoir chamber 18a of the high pressure chamber 18. Therefore, the high-pressure lubricating oil is guided to the sliding surface 3 a of the front side block 3 through the lubricating hole 24.

A lubricating groove 25 communicating with the lubricating hole 24 is formed on the sliding surface 3 a of the front side block 3 by casting. The lubrication groove 25 is bent in a V shape, but is not limited to this and may have various shapes as shown in FIGS. 4a and 4b. The lubrication hole 24 and the lubrication groove 25 communicate with the back pressure chamber 11a in the high pressure section α when the rotor 8 rotates and are supplied with high pressure (directly guided from the high pressure chamber 18) to supply pressure to the back pressure chamber 11a. Then, the pushing force of the vane 10 (abutting force on the cylinder) is increased. In this high-pressure section α, the compression chamber (the space surrounded by the vane, cylinder, and rotor) is reduced, and the compression force is high.

The sliding surface 3 a of the front side block 3 is provided with a flow passage hole 26 for the discharged fluid, an O-ring insertion hole 27, and a bolt insertion hole 28. Reference numeral 34 is a communication passage for sending the lubricating oil described below.

On the other hand, the rear head 6 is fixed to the rear side block 4 to form a low pressure chamber 30 between the rear head 6 and the rear side block 4, and the low pressure chamber 30 includes suction holes 32a, 32b and It communicates with the communication hole 17.

The rear side block 4 has a drive shaft hole 39 formed at the center thereof, and suction holes 32a and 32b which are not shown in FIG. The sliding surface 4a of the rear side block 4 has a lubricating hole 36 similar to the lubricating hole 24 formed in the front side block 3 communicating with the communicating passage 34 communicating with the oil reservoir chamber 18a. A lubricating groove (not shown) communicating with this is formed. This lubricating groove is also similar to the embodiment shown in FIG. 3, but it may have the same shape as a and b in FIG.

In the above configuration, when the rotor 8 rotates, each vane 10 slides with its tip in contact with the cylinder inner peripheral surface 2a, thereby changing the volume of each compression chamber defined by them. Refrigerant gas is sucked through the suction holes 32a and 32b and compressed to discharge the high-pressure refrigerant gas from the discharge hole 21 through the discharge hole 19 to the cooling cycle.

When passing through the high pressure chamber 18, the lubricating oil contained in the refrigerant gas is separated and accumulated in the oil reservoir chamber 18a. This lubricating oil has a high pressure and reaches the lubrication hole 24 through the communication passage 24a, and lubricates the sliding surfaces 8a and 3a between the rotor 8 and the front side block 3 from there. That is, the lubricating oil discharged from the lubrication hole 24 enters the lubrication groove 25 immediately or spreads in the radial direction for lubrication. Further, since the lubrication groove 25 is in the high pressure section, it communicates with the vane back pressure chamber 11a that has reached the high pressure section, high-pressure lubricating oil is supplied to the vane back pressure chamber 11a, and is directed to the cylinder inner peripheral surface 2a of the vane 10. This is to increase the pressing force of.

The high-pressure lubricating oil reaches the lubricating hole 36 on the rear side block 4 side through the communication passage 34, and lubricates the sliding surfaces 8 b, 4 a between the rotor 8 and the rear side block 4. That is, the same lubricating action as the above-mentioned lubrication on the front side block side is performed, and high pressure is also supplied to the vane back pressure chamber 11a.

Lubricating oil is supplied at symmetrical positions on the side block side by providing lubricating holes 24 and 36, communication passages 17 and 34 communicating with the lubricating holes, and a lubricating groove 25 (not shown on the rear side block side). By providing this, it is possible to centralize processing, reduce the processing man-hours for the lubrication holes compared to the conventional example, and reduce the processing man-hours for the front side block by reducing the communication path processing man-hours. In addition, it is possible to insert a blind pin as a blind hole of a conventional lubricating oil communication hole and reduce the number of blind parts.

[0025]

[Effect of the device]

 As described above, according to the present invention, the lubrication holes and the lubrication grooves are collected on the side block side, and the lubrication groove machining is eliminated from the rotor side, so that the machining is concentrated on the side block side and the machining work is performed. In addition, the number of lubrication holes is reduced to one because the lubrication holes are located at symmetrical positions, and the number of machining steps is reduced.

[Brief description of drawings]

FIG. 1 is a sectional view of a compressor of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

4A and 4B show another embodiment of the lubricating groove.

5 is a view of the front side block from the front head side in a state where the front head is removed in FIG. 1. FIG.

[Explanation of symbols]

 2 cylinder block 3 front side block 4 rear side block 8 rotor 10 vane 11 groove 18 high pressure chamber 22 back pressure adjusting device 24 lubrication hole 25 lubrication groove 36 lubrication hole

Claims (1)

[Scope of utility model registration request] 1. A compressor in which a rotor having a large number of vanes in a radial direction is rotatably arranged in a cylinder block having a desired shape, and side blocks are provided on both sides of the cylinder block and the rotor. A compressor characterized in that a lubricating hole having a point-symmetrical drive shaft hole is opened on the sliding surface of the side block, and a lubricating groove having a desired shape communicating with the lubricating hole is formed.