U.S. patent application number 17/269031 was filed with the patent office on 2021-06-17 for cylinder head for a compressor.
The applicant listed for this patent is VOITH PATENT GMBH. Invention is credited to MARIUS BURKAUSKAS.
Application Number | 20210180582 17/269031 |
Document ID | / |
Family ID | 1000005433678 |
Filed Date | 2021-06-17 |
United States Patent
Application |
20210180582 |
Kind Code |
A1 |
BURKAUSKAS; MARIUS |
June 17, 2021 |
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.
Inventors: |
BURKAUSKAS; MARIUS;
(ZSCHOPAU, DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
VOITH PATENT GMBH |
HEIDENHEIM |
|
DE |
|
|
Family ID: |
1000005433678 |
Appl. No.: |
17/269031 |
Filed: |
July 23, 2019 |
PCT Filed: |
July 23, 2019 |
PCT NO: |
PCT/EP2019/069726 |
371 Date: |
February 17, 2021 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
F04B 39/06 20130101;
F04B 39/125 20130101; F04B 39/1066 20130101 |
International
Class: |
F04B 39/12 20060101
F04B039/12; F04B 39/06 20060101 F04B039/06 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 17, 2018 |
DE |
10 2018 120 027.7 |
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
[0001] The invention relates to a cylinder head for a compressor,
in particular a reciprocating compressor for use in motor vehicles,
which is suitable for compressing a compressible working medium, in
particular air, for use in a compressed air supply device of a
motor vehicle.
[0002] Reciprocating compressors and/or compressors or air
compressors serve for the compression of gases, for example air,
which is used as a working medium for operating various systems in
a motor vehicle.
[0003] The reciprocating compressor substantially consists of a
main body and/or crankshaft housing or cylinder housing, in which
at least one reciprocating piston is arranged, and a cylinder head.
During operation, ambient air is suctioned into the reciprocating
piston chamber via an inlet channel, the ambient air is compressed
and subsequently passed on via a channel. In the case of a
multi-stage reciprocating compressor, the compressed air is passed
on into a further and/or downstream compressor stage and is
compressed further therein. The compressed air is subsequently
conducted into the compressed air tank via an air treatment
unit.
[0004] Such a cylinder head is disclosed, for example, in DE 10
2015 225 069 A1 and is composed of a plurality of components which
are arranged in layers one on top of the other. The components form
various channels or chambers through which air or a cooling medium,
in particular cooling water, flows. For cooling the compressed air,
the guidance of the channel through the cylinder head and/or
through the individual components of the cylinder head is selected
such that the channel is as long as possible and is guided as
closely as possible past the cooling medium channel. Due to the
compact design of the cylinder head, however, it is not possible to
avoid that a heat exchange takes place between the airflows which
are guided through the cylinder head and which have different
temperatures.
[0005] In this case, the heat transfer between the airflows which
are at different temperatures takes place via the partition walls
of the channels. Due to the metal design of these partition walls
the thermal conductivity is very good. A drawback is that this heat
transfer negatively influences the efficiency of the reciprocating
compressor.
[0006] The object of the invention is to improve the cylinder head
construction such that the efficiency of the reciprocating
compressor is increased.
[0007] The object is achieved according to the invention by a
cylinder head embodiment which is constructed such that an
undesired heat transfer between two fluid flows is minimized.
Further advantageous features of the embodiment according to the
invention are disclosed in the subclaims.
[0008] A cylinder head for a reciprocating compressor for
compressing a compressible working medium, comprising a cylinder
cover and a valve carrier plate, is proposed, said cylinder head
being constructed as follows and having the following features.
[0009] An intermediate element is arranged between the cylinder
cover and the valve carrier plate, and a plurality a channel
sections and/or chambers are arranged between the valve carrier
plate and the intermediate element and between the cylinder cover
and the intermediate element and/or are formed thereby, through
which various media flows can be conducted. In order to improve the
efficiency of the reciprocating compressor, one or more insulation
chambers are provided in the cylinder head, which at least in
regions thermally insulate the channel sections and/or chambers
from one another.
[0010] In a preferred embodiment, for example in a single-stage
reciprocating compressor, an inlet chamber and an outlet chamber
are provided, the insulation chamber being arranged therebetween.
In the case of multi-piston compressors or even multi-stage
compressors, further insulation chambers may also be arranged
between the different temperature ranges.
[0011] Moreover, an outlet channel may be provided in the cylinder
head, wherein the insulation chamber at least in regions thermally
insulates the inlet chamber and the outlet chamber relative to the
outlet channel.
[0012] The insulation chambers may be substantially formed by
recesses in the valve carrier plate and/or in the cylinder cover.
In this case, therefore, the recesses are closed by means of the
intermediate element.
[0013] Preferably, the insulation chambers contain enclosed ambient
air. During assembly, therefore, no additional working step needs
to be factored in. Alternatively, however, the insulation chambers
may also be filled with an insulating material or contain a
vacuum.
[0014] It may also be provided that the intermediate element has
connection openings which connect together the channel sections
and/or chambers in the valve carrier plate and in the cylinder
cover. Thus the airflow and/or the cooling medium flow may pass
from one plane to another. The intermediate element may also be a
sealing element.
[0015] In one embodiment, the cylinder head may be a cylinder head
for a multi-stage reciprocating compressor, wherein the inlet
chambers of the compressor stages are arranged between the outlet
chambers of the compressor stages.
[0016] Moreover, an insulation chamber may be arranged between the
outlet chamber and the inlet chamber of the second compressor stage
and/or between the inlet chamber of the second compressor stage and
the inlet chamber of the first compressor stage.
[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
* * * * *