CYLINDER HEAD FOR A COMPRESSOR

Abstract

A cylinder head for a reciprocating compressor for compressing a compressible working medium includes a cylinder cover and a valve carrier plate. An intermediate element is arranged between the cylinder cover and the valve carrier plate, and a plurality of channel sections and/or chambers are formed between the valve carrier plate and the intermediate element and between the cylinder cover and the intermediate element or are formed thereby, through which various media flows can be conducted. The efficiency of the reciprocating compressor is improved in that insulation chambers are provided in the cylinder head, which at least in regions thermally insulate the channel sections and/or chambers from one another.

Claims

1-10. (canceled)

11. A cylinder head for a reciprocating compressor for compressing a compressible working medium, the cylinder head comprising: a cylinder cover; a valve carrier plate; and an intermediate element disposed between said cylinder cover and said valve carrier plate; a plurality of channel sections and/or chambers configured to conduct therethrough various media flows, said channel sections and/or said chambers being formed between said valve carrier plate and said intermediate element and between said cylinder cover and said intermediate element, respectively; an insulation chamber formed to thermally insulate said channel sections and/or chambers from one another, at least in regions.

12. The cylinder head according to claim 11, wherein said insulation chamber is formed between an inlet chamber and an outlet chamber of the cylinder head.

13. The cylinder head according to claim 11, wherein the cylinder head is formed with an outlet channel, and wherein said insulation chamber is formed to, at least in regions, thermally insulate said inlet chamber and said outlet chamber relative to said outlet channel.

14. The cylinder head according to claim 11, wherein said insulation chambers are substantially formed by recesses in said valve carrier plate and/or in said cylinder cover.

15. The cylinder head according to claim 11, wherein said insulation chamber contains enclosed ambient air.

16. The cylinder head according to claim 11, wherein said insulation chamber is filled with an insulating material or contains a vacuum.

17. The cylinder head according to claim 11, wherein said intermediate element is formed with connection openings which connect together said channel sections and/or chambers in said valve carrier plate and in said cylinder cover.

18. The cylinder head according to claim 11, wherein said intermediate element is a sealing element.

19. The cylinder head according to claim 11, configured as a cylinder head for a multi-stage reciprocating compressor with a plurality of compressor stages, and wherein inlet chambers of said compressor stages are arranged between respective outlet chambers of said compressor stages.

20. The cylinder head according to claim 19, wherein said compressor stages include a first compressor stage and a second compressor stage, and wherein an insulation chamber is formed between an outlet chamber and an inlet chamber of said second compressor stage and/or between an inlet chamber of said second compressor stage and an inlet chamber of said first compressor stage.

Description

[0017] By means of exemplary embodiments, further advantageous features of the invention are described with reference to the drawings. The cited features may not only be used advantageously in the combination shown but may also be individually combined together. The figures show in detail:

[0018] FIG. 1 shows the reciprocating compressor with the cylinder head (section B-B)

[0019] FIG. 2 shows a plan view of the cylinder head (section A-A)

[0020] FIG. 3 shows an alternative construction for a cylinder head

[0021] FIG. 1 shows a two-stage reciprocating compressor 1 and/or compressor with a cylinder head 2 in section. The section line may be seen in FIG. 2. The cylinder head 2 is composed of the valve carrier plate 5, the cylinder head cover 7 and an intermediate element 6 arranged therebetween.

[0022] FIG. 2 shows a plan view of the cylinder head 2, wherein the section line A-A of FIG. 1 may be seen.

[0023] The reciprocating compressor 1 has a water cooling system which runs through the cylinder housing 3 and through the cylinder head 2. The exact path of the cooling medium channels 8.1 and 8.2, which are connected together so that a flow of cooling medium may flow through the two regions, is not able to be identified.

[0024] As may also be seen in FIGS. 1 and 2, a plurality of channel sections 8.1, 10 run between the valve carrier plate 5 and the intermediate element 6 and between the cylinder cover 7 and the intermediate element 6 and a plurality of chambers 14.1, 14.2, 15.1 and 15.2 are present. Moreover, a plurality of insulation chambers 9.1, 9.2 are arranged in the cylinder head 2.

[0025] In this exemplary embodiment the insulation chambers 9.1 and 9.2 are arranged such that, in particular, the channel section 10, through which the hot compressed air of the second compressor stage 18 is conducted to the outlet opening 20, is insulated from the chambers 14.1, 14.2, 15.1 and 15.2. This prevents undesired heating of the intake air, in particular the cool ambient air, and the precompressed air which is conducted from the first compressor stage 17 to the second compressor stage 18.

[0026] The path of the insulation chambers may be seen in FIG. 2, wherein it may be identified that a complete separation is not necessarily achieved between the hot and cold airflows by means of the insulation chambers. However, the direct heat transfer through the metal partition walls is at least significantly reduced by the partial insulation.

[0027] As may be identified, the insulation chambers 9.1 and 9.2 are sealed cavities which are formed substantially by recesses in the valve carrier plate 5 and in the cylinder cover 7 and are closed by the intermediate element 6. The insulation chambers 9.1 and 9.2 are filled with ambient air which has been enclosed during assembly.

[0028] In the case of two-stage reciprocating compressors 1 it is essential that the precompressed air from the first compressor stage 17 is cooled as far as possible before it is suctioned into the second compressor stage 18 via the inlet chamber 14.2. In order to achieve this, the airflow is conducted from the outlet chamber 15.1 of the first compressor stage 17 through a connecting channel 19 in the cylinder housing 3. The walls of the connecting channel 19 are in contact at one point with the cooling channel 8.2 and additionally have a large cooling surface relative to the ambient air.

[0029] FIG. 3 shows an alternative construction for a cylinder head 1. This cylinder head differs substantially by the arrangement of the channels and chambers. Thus in this case the insulation chambers 9.3 are arranged between the connecting channel 19 and the compressed air channel 10. The insulation chamber 9.3 is incorporated in the valve carrier plate 5 and is closed by the sealing element 4.

LIST OF REFERENCE NUMERALS

[0030] 1 Compressor [0031] 2 Cylinder head [0032] 3 Cylinder housing [0033] 4 Sealing element [0034] 5 Valve carrier plate [0035] 6 Intermediate element [0036] 7 Cylinder cover [0037] 8 Cooling medium channel [0038] 9.1 . . . 9.3 Insulation chamber [0039] 10 Compressed air channel [0040] 11 Intake air channel second stage [0041] 12 Outlet valve [0042] 13 Inlet valve [0043] 14.1, 14.2 Inlet chamber [0044] 15.1, 15.2 Outlet chamber [0045] 16 Reciprocating piston chamber [0046] 17 First compressor stage [0047] 18 Second compressor stage [0048] 19 Connecting channel [0049] 20 Outlet opening