JPS61237892A - Screw compressor having helical structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The invention provides that a compressor block containing two rotors is incorporated into a substantially cylindrically formed pressure vessel by means of a flange at its end face carrying a drive shaft, the pressure vessel being The present invention relates to a screw compressor of compact design, which serves as an oil separation vessel and has an oil separation cartridge, and in which fresh air can be supplied to the compressor block via a suction regulator with an air filter.

The object of the invention is to complete the robust construction of a screw compressor of the above type and to make it particularly suitable also for relatively high output powers. This problem is solved according to the invention by the means described in the features of claim 1.

In particular, the following advantages are achieved with the invention:

That is, the conventional structure in which the compressor block was inserted into the cylindrical pressure vessel from the end face of the pressure vessel parallel to the axis thereof has been significantly improved.

That is, the end face of the compressor block no longer sits on a relatively large special flange that closes the cylindrical pressure vessel, and the cylindrical pressure vessel no longer has the dome that was previously necessary to house the oil separation cartridge. no longer requires additional fittings. The compressor block can now be inserted into the pressure vessel from above and then fixed directly with its drive end face to the inner flange of a relatively small flange opening, which approximately corresponds to the size of the end face of the compressor block. In this case, the inner flange can be located directly at the flange opening of the pressure vessel. However, it is also possible to use an intermediate flange that is inserted into the flange opening from the outside,
The intermediate flange then has an inner flange carrying the compressor block. By placing the compressor block in a horizontal position, a lid area 3 and a space above the compressor block are actually obtained in the pressure vessel, where a number of oil separation cartridges can now be installed in a battery-like parallel arrangement. This is particularly advantageous for relatively large powers. These oil separation cartridges are connected in a simple manner to the base of a conventional pressure-maintaining and non-return valve placed in the lid and having a corresponding connecting channel. The oil separation cartridge is easy to access for maintenance and does not require disassembly of other components of the compressor.

In a further advantageous development of the invention, the compressor blocks are arranged in such a way that the rotors are one on top of the other and the supply of fresh air can take place laterally to them directly from the cylindrical wall.

In this case, the suction regulator placed on the pipe connection piece of the pressure vessel is provided with an annular projection reaching the interior of the pressure vessel and is seated on the compressor block, thereby allowing the dimensional tolerance of the mounting flange of the pressure vessel to be adjusted. It can be compensated particularly well. This is because the annular projection of the suction regulator can be pivoted in a ball-and-socket manner on the opposite part of the compressor block within the tolerances actually required.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As is clear from the figure, the screw compressor essentially consists of a cylindrical pressure vessel 1 serving as an oil-separated oil-free storage vessel, a compressor block 2 arranged therein, and a minimum pressure and check valve 4. It consists of two oil separation cartridges 3 with a suction regulator 5 and a drive motor (not shown separately) connected to the shaft 6 of the compressor block. The cylindrical pressure vessel 1 stands vertically and is filled to level 7 with oil. The upper side of the cylindrical container 1 has a flange opening which almost surrounds the entire inner diameter and is closed by a lid 8.

This lid has the aforementioned oil separation cartridge 3 below the two holes 9. Above the bore 9 a minimum pressure and non-return valve 4 is provided which, with its base 10 and the passage 11 arranged therein, connects both bores 9 provided for the oil separation cartridge 3. It concentrates and leads to the original minimum pressure and check valve. As can be seen, the compressor block 2 is arranged transversely to the axis of the pressure vessel 1. When assembling the compressor, the compressor block 2 is inserted into the compression vessel 1 from above and its drive end face 12 is
:r:, intermediate flange 14 carrying inner flange 13
Fasten with screws. In this case, the intermediate flange 14 overlaps the connecting piece-like flange 15 of the pressure vessel from the outside. Support frame 16 for the drive motor together with intermediate 7/j 14
to be fixed. Compressor blower 220 both rotors 17,1
Due to the arrangement of B above and below, the supply of fresh air can take place laterally from the cylindrical wall of the pressure vessel 10 without special conduits. For this purpose, the pressure vessel 1 has a pipe connection piece 19 with a flange 20, to which the suction regulator 5 is attached. The suction regulator, which includes the usual components such as a filter 21 , a seal 22 , a relief valve 25 , a solenoid valve 24 and a regulating cylinder 25 , has a tubular projection 26 that extends into the pressure vessel 1 . With this tubular protrusion, the suction regulator 5 is connected to the compressor block block 2.
The counterpiece 27 seated on the compressor block 2 includes a non-return valve 29 and also serves to supply fresh air to the compressor block 2, which is implied by the passage 30. Rotor 1
Air compressed by 7, 18 exits the compressor block via pend 31 and enters pressure vessel 1. The air passes through the oil separation cartridge 3 and is supplied via a minimum pressure and non-return valve 4 to the actual compressed air storage container or consumption device, which is not individually shown.

[Brief explanation of the drawing]

1 is a schematic vertical sectional view of a screw compressor according to the invention, and FIG. 2 is a cross sectional view of the arrangement according to FIG.

Claims (6)

[Claims] (1) A compressor block containing two rotors is incorporated by a flange at its end face carrying a drive shaft into a substantially cylindrically formed pressure vessel, the pressure vessel serving as an oil separation vessel and In screw compressors of compact construction, with a separation cartridge and in which fresh air can be supplied to the compressor block via a suction regulator with an air filter, the pressure vessel (1) is vertically , and has an upper flange opening surrounding almost the entire inner diameter, into which a lid (8) is screwed and a compressor block (2) insertable through the flange opening is arranged transversely to the cylindrical axis; Screw compressor, characterized in that it is fixed at its end face (12) to the inner flange (13) of a further flange opening arranged in the cylindrical wall. (2) The screw according to claim 1, wherein the further flange opening consists of a cylindrical connecting piece (33) arranged in the cylindrical wall, which connecting piece has a flange (15) on its end face. compressor. (3) Inner flange carrying compressor block (2) (
13) is a component of an intermediate flange (14), which intermediate flange is placed on the flange (15) of the connecting piece (33) and is at the same time a carrier flange for the drive motor for the compressor block. The screw compressor according to item 2 of the range. (4) The rotors (17, 18) are arranged superimposed on the compressor block (2), the suction regulator (5) is arranged laterally to this, and the pipe connection piece is arranged on the cylinder wall (1). (19)
The screw compressor according to any one of Items 1 to 3, wherein the screw compressor is seated on a screw compressor according to any one of Items 1 to 3. (5) The suction regulator (5) is provided with a tubular projection (26) reaching the interior of the pressure vessel (1), which projection is seated on the compressor block and includes an air supply passage (30). O-ring seal (28) to corresponding counterpiece (27)
5. The screw compressor according to claim 4, wherein the screw compressor is pushed through the compressor. (6) At least two oil separation cartridges (3) are arranged inside the lid, each below the hole (9), and on the top of the lid there is a minimum pressure and check valve (4) above the hole (9). is present, the base (10) of this valve having inlet openings corresponding to the holes (9) in the lid, these inlet openings opening into passages (11) in the base connecting the holes (9). , a screw compressor according to any one of claims 1 to 5.