GB2165317A - Improvements in or relating to piston compressors - Google Patents
Improvements in or relating to piston compressors Download PDFInfo
- Publication number
- GB2165317A GB2165317A GB08517796A GB8517796A GB2165317A GB 2165317 A GB2165317 A GB 2165317A GB 08517796 A GB08517796 A GB 08517796A GB 8517796 A GB8517796 A GB 8517796A GB 2165317 A GB2165317 A GB 2165317A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- suction
- pressure
- valve seating
- suction plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Abstract
A piston compressor is provided with a combined suction and pressure valve, which has a common valve seating plate (8) arranged between the cylinder (1) and the cylinder head (4). The valve seating plate (8) is provided with suction channels (11) and a split ring suction plate (13) and with at least one pressure channel (12) and a tongue- shaped pressure plate (16). The pressure channel (12) is arranged in the region enclosed by the suction plate (13) and the pressure plate (16) is secured by screws 17 outside the circumference of the suction plate (13) on the valve seating plate (8). The suction plate (13) comprises a spring ring which is open or split at one point, one end being secured by screws (14) on the valve seating plate (8) and the other being freely movable to an end stop. The pressure plate (16) crosses over the suction plate (13) in the region of its secured end, in which no suction channels are provided. <IMAGE>
Description
SPECIFICATION
Improvements in or relating to piston compressors
The invention relates to a piston compressor of the type having a combined suction and
pressure valve, which has a common valve seating plate arranged between the cylinder and the cylinder head of the compressor and
provided with suction channels and an annular -suction plate and with at least one pressure
channel arranged in the region enclosed by the
suction plate and a tongue-shaped pressure
plate, which is secured outside the circumfer
ence of the annular suction plate on the valve
seating plate.
Piston compressors of this type are already
known. British Patent 737 908 discloses a
piston compressor the approximately annular
suction plate of which is clamped on one side
between the cylinder and the valve seating
plate and controls the suction channels with
its free end. In its inner region the suction
plate has a recess, above which pressure
channels are provided in the valve seating
which are controlled by means of a pressure
plate which crosses over the suction plate in
the manner of an arc. This arrangement allows
for a relatively simple design of the cylinder
head with a diametrically projecting dividing
wall between the suction chamber and the
compression chamber. Only a relatively small
portion of the cylinder surface is, however,
provided for the suction channels.
Further piston compressors with combined
valves are known from Austrian Patent 265
337, British Patent 839 169 and US Patent 2
984 408. In these patents both the suction
valves and the pressure valves plates which
penetrate the cylinder diametrically and which
are formed in the shape of a tongue. The
pressure channels are provided laterally adja
cent the suction plates so that the conveyed
medium can flow through them. This valve
design allows for only small cross sectional
areas of passage of the suction channels rela
tive to the cross sectional area of the cylinder
of the compressor, on account of which this
design is only suitable for large compressors
and those embodiments of which only low re
quirements are made with respect to convey
ing performance.
In the case of the combined compressor
valve which is also known from German Pa
tent 866 712, both the suction plate and the
pressure plate comprise respectively a ring
which is connected to a hub by means of
webs. The hubs of both plates are secured on
the valve seating plate with a screw which is
arranged in the valve axis. This valve design
allows for suction channels in the valve sea
ting plate which project circularly, but requires
complicated guiding of the channels and
diverting the flow of the conveyed medium in the valve seating plate, so that production is expensive and pressure losses during the passage of the medium through the valves high.
According to the invention, there is provided a piston compressor comprising a combined suction and pressure valve having a common valve seating plate which is arranged between a cylinder and a cylinder head of the compressor and which is provided with suction channels, with an annular suction plate, with at least one pressure channel which is arranged in a region enclosed by the suction plate, and with a tongue shaped pressure plate which is secured outside the circumference of the annular suction plate on the valve seating plate, the suction plate comprising a spring ring which is open at one point and which is clamped by one end to the valve seating plate but is freely movable at its other end, the pressure plate crossing the annular suction plate in a region which surrounds the securing point of the suction plate and, in which no suction channels are provided, the pressure plate extending in a substantially radial direction to the pressure channel.
It is thus possible to provide piston compressors such that, in the case of small spatial requirements, simple structure and frictionless guiding of the closure plates of the valves, and relatively large cross sectional areas of passage, in particular of the suction valve, are possible and a small clearance can be obtained.
A simple design of the compressor valves can be provided which meets all requirements made of valves of this type to the full in a surprising way. Both closure plates are guided so as to be frictionless, without taking up additional space for performing the guiding or for possible guides.
The annular suction plate allows for the arrangement of suction channels across a wide area of the cylinder circumference near the cylinder edge, so that a large cross sectional area of passage can be accommodated by the valve seating plate. By means of the arrangement of the pressure plates in a region in which the suction plate is lifted only slightly off the valve seating plate and where no passage channels of the suction valve are provided, the suction valve is not impaired by the
pressure valve. The closure plates can be se
cured simply on the valve seating plate, e.g.
by screws. The clearance of the piston com
pressor can be kept small and the cylinder
head can also have a relatively simple form.
Compressor valves are known from Swiss
Patent 38 61 7 with a suction plate which
comprises a spring ring which is open at one
point and is clamped by one end on the valve
seating plate, and which is freely movable by
its other end up to an end stop. In this case,
simple annular valves are involved which can
be used both as a suction valve or a pressure
valve and can be inserted into valve recesses of the compressor. Contrastingly, in the case of the invention it is not the design of the closure plate which is involved per se, but a particular spatial arrangement of the suction plate and the pressure plate relative to one another.
In a preferred embodiment of the invention the longitudinal axis of the pressure plate is arranged at least approximately in the axial plane of the compressor which passes through the securing point of the suction plate. In this way, maximum use is made of the space provided for the valves.
In a further embodiment of the invention the piston compressor can be formed in such a way that the suction plate at its outer edge projects across at least a portion of its width into a annular groove shaped recess in the cylinder wall which communicates with the valve seating plate and which forms the end stop for the lifting movement. In this embodiment the suction plate is arranged so as to be protected and an end stop, which avoids too large a deflection, is associated therewith about its entire circumference. Further, this arrangement allows for an additional increase in the cross sectional area of passage, because the graduated circle, on which the suction channels are recessed in the valve seating plate, is also enlarged with the enlargement of the outer circumference beyond the cylinder edge.
In order to prevent a disadvantageous enlargement of the clearance, the suction plate may surround concentrically a projection which projects from the piston head in the axial direction of the cylinder and which projects into the pressure channel of the valve seating plate in the upper dead centre position of the piston.
The invention will be further described, by way of example, with reference to the accompanying drawings, in which:
Figure 1 shows an axial middle section through the upper part of a compressor with cylinder head and valves; and
Figure 2 shows a cross-section on line ll-ll in Fig. 1.
The compressor comprises a cylinder 1 with a cylinder borehole 2, in which a piston 3 is displaceable. Above the cylinder 1, a cylinder head 4 is provided which has a suction chamber 5 and a pressure chamber 6, which are separated from one another by a dividing wall 7. Between the cylinder 1 and the cylinder head 4 a valve seating plate 8 is clamped which is sealed with a sealing ring 9 against the cylinder 1 and against the cylinder head 4 with a sealing disc 10.
In the valve seating plate 8, a plurality of suction channels 11 are arranged on a graduated circle which is concentric to the cylinder axis and a pressure channel 12 is arranged in the cylinder axis. An annular suction plate 13, which is secured on the valve seating plate 8 at one end by two screws 14 provided on the securing point and which is associated with the suction channels 11, covers all suction channels 11 and can be lifted off the suction channels 11 resiliently in an annular groove shaped recess 15 of the cylinder 1. The pressure valve comprises a tongue-shaped pressure plate 16 which covers the pressure channel 12 and is secured on the valve seating plate 8 by means of screws 17. A projecting rib 18 in the pressure chamber 6 forms an end stop for the lifting movement of the pressure plate 16.It can also be seen from Fig. 1 that the piston 3 has a projection 19 which projects in an axial direction, and which projects coaxially through the suction plate 13 into the pressure channel 12 of the valve seating plate 8.
The pressure plate 16 is secured by means of screws 17 outside the circumference of the suction plate and extends by its free end in an approximately radial direction to the pressure channel 12. As can be seen in particular from
Fig. 2, the pressure plate 16 crosses over the annular suction plate 13 in the region of the securing point of the suction plate 13, i.e.
near the securing screws 14, in which region no suction channels 11 are provided in the valve seating plate 8. There is therefore no loss of space for the suction channels 11 in this arrangement as a result of the pressure plate 16, so that the suction channels can occupy a large cross section.
In the embodiment the longitudinal axis of the pressure plate 16 projects approximately in the axial plane of the compressor which passes through the securing point 4 of the suction plate 13, as a result of which there is maximum use of space. Since the suction plate 13, however, also lifts only slightly off the valve seating plate 8 in the region in communication with with the securing point, no appreciable cross sectional area of passage can be cleared in this section either.
The pressure plate 16 can also, therefore, deviate from the optimum arrangement shown in the embodiment and cross over the suction plate 13 laterally adjacent the securing point 14.
The dividing wall 7 between the suction chamber 5 and the pressure chamber 6 projects concentrically to the pressure channel 12, so that the cylinder head 4 also has a simple and clear shape. The annular groove shaped recess 15 in the cylinder 1 forms an end stop for the annular suction plate 13 in its lifting movement, which at least projects by its outer edge into the recess 15. The projection 19 of the piston 3, which fills up the pressure channel 12 in the dead centre position of the piston, effects a small clearance space of the compressor.
Claims (5)
1. A piston compressor comprising a com bined suction and pressure valve having a common valve seating plate which is arranged between a cylinder and a cylinder head of the compressor and which is provided with suction channels, with an annular suction plate, with at least one pressure channel which is arranged in a region enclosed by the suction plate, and with a tongue shaped pressure plate which is secured outside the circumference of the annular suction plate on the valve seating plate, the suction plate comprising a spring ring which is open at one point and which is clamped by one end to the valve seating plate but is freely movable at its other end, the pressure plate crossing the annular suction plate in a region which surrounds the securing point of the suction plate and, in which no suction channels are provided, the pressure plate extending in a substantially radial direction to the pressure channel.
2. A piston compressor as claimed in claim 1, in which the longitudinal axis of the pressure plate is disposed substantially in an axial plane of the compressor which passes through the securing point of the suction plate.
3. A piston compressor as claimed in claim 1 or 2, in which the suction plate on its outer edge projects across at least a portion of its width into an annular groove shaped recess in the cylinder wall which communicates with the valve seating plate and which forms an end stop for lifting movement.
4. A piston compressor as claimed in any one of the preceding claims, in which the suction plate surrounds concentrically a projection which projects from a piston head in the axial direction of the cylinder and which projects in the top dead centre point of the piston into the pressure channel of the valve seating plate.
5. A piston compressor substantially as hereinbefore described with reference to and as illustrated in the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT244284 | 1984-07-27 |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8517796D0 GB8517796D0 (en) | 1985-08-21 |
GB2165317A true GB2165317A (en) | 1986-04-09 |
GB2165317B GB2165317B (en) | 1987-12-02 |
Family
ID=3534425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08517796A Expired GB2165317B (en) | 1984-07-27 | 1985-07-15 | Improvements in or relating to piston compressors |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE3526255A1 (en) |
FR (1) | FR2568320A1 (en) |
GB (1) | GB2165317B (en) |
IT (1) | IT1200677B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19833286A1 (en) * | 1997-07-26 | 1999-02-04 | Knorr Bremse Systeme | Gas compressor water-cooled cylinder head |
US5980219A (en) * | 1995-08-11 | 1999-11-09 | Knorr-Bremse Systems Fur Nutzfahrzeuge Gmbh | Piston-type compressor, especially for generating compressed air in motor vehicles |
US6016833A (en) * | 1995-08-06 | 2000-01-25 | Knorr-Bremse Systems Fur Nutzfahrzeuge Gmbh | Valve plate for piston compressor, especially for air compression in motor vehicles |
US6113369A (en) * | 1997-07-26 | 2000-09-05 | Knorr-Bremse Systems For Commerical Vehicles Ltd. | Reed valve arrangement and gas compressor employing a reed valve arrangement |
US6116874A (en) * | 1997-07-26 | 2000-09-12 | Knorr-Bremse Systems For Commercial Vehicles Limited | Gas compressors |
CN100386519C (en) * | 2000-12-27 | 2008-05-07 | Lg电子株式会社 | Valve assembly for hermetic compressor |
CN101943157A (en) * | 2010-09-27 | 2011-01-12 | 加西贝拉压缩机有限公司 | Air suction valve sheet structure for refrigeration compressor |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19614239C1 (en) * | 1996-04-10 | 1997-10-09 | Ppv Verwaltungs Ag | Reciprocating compressor for reactive media |
EP1180214B1 (en) | 1999-05-25 | 2003-08-13 | DANFOSS COMPRESSORS GmbH | Axial piston refrigerant compressor |
RU2148192C1 (en) * | 1999-08-26 | 2000-04-27 | Набережных Анатолий Иванович | Motor-compressor |
DE102004047159B4 (en) * | 2004-09-29 | 2006-09-07 | Danfoss Compressors Gmbh | Piston compressor, in particular hermetic refrigerant compressor |
CN106438374B (en) * | 2016-11-04 | 2020-08-11 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor and air conditioner with same |
AT521496B1 (en) * | 2019-02-06 | 2020-02-15 | Hoerbiger Wien Gmbh | Cylinder head for piston compressor |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH38617A (en) * | 1906-10-30 | 1907-11-30 | W Rogler Friedrich | Valve |
FR1461288A (en) * | 1964-12-30 | 1966-12-10 | Magneti Marelli Spa | Device for fixing disc valves in air compressors |
CH597544A5 (en) * | 1976-03-30 | 1978-04-14 | Bruno Lamparter | Flap valve esp. for dry running compressor |
DE2739883A1 (en) * | 1977-09-05 | 1979-03-15 | Wabco Westinghouse Gmbh | COMPRESSOR CYLINDER HEAD WITH VALVE MOUNTING PLATE |
DE3245512A1 (en) * | 1982-12-09 | 1984-06-14 | Fichtel & Sachs Ag, 8720 Schweinfurt | Suction valve with a lifting section for a reciprocating piston compressor |
-
1985
- 1985-07-15 GB GB08517796A patent/GB2165317B/en not_active Expired
- 1985-07-15 IT IT21566/85A patent/IT1200677B/en active
- 1985-07-23 DE DE19853526255 patent/DE3526255A1/en not_active Withdrawn
- 1985-07-25 FR FR8511405A patent/FR2568320A1/en not_active Withdrawn
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6016833A (en) * | 1995-08-06 | 2000-01-25 | Knorr-Bremse Systems Fur Nutzfahrzeuge Gmbh | Valve plate for piston compressor, especially for air compression in motor vehicles |
US5980219A (en) * | 1995-08-11 | 1999-11-09 | Knorr-Bremse Systems Fur Nutzfahrzeuge Gmbh | Piston-type compressor, especially for generating compressed air in motor vehicles |
DE19833286A1 (en) * | 1997-07-26 | 1999-02-04 | Knorr Bremse Systeme | Gas compressor water-cooled cylinder head |
US6053713A (en) * | 1997-07-26 | 2000-04-25 | Knorr-Bremse Systems For Commercial Vehicles Limited | Gas compressors |
US6113369A (en) * | 1997-07-26 | 2000-09-05 | Knorr-Bremse Systems For Commerical Vehicles Ltd. | Reed valve arrangement and gas compressor employing a reed valve arrangement |
US6116874A (en) * | 1997-07-26 | 2000-09-12 | Knorr-Bremse Systems For Commercial Vehicles Limited | Gas compressors |
CN100386519C (en) * | 2000-12-27 | 2008-05-07 | Lg电子株式会社 | Valve assembly for hermetic compressor |
CN101943157A (en) * | 2010-09-27 | 2011-01-12 | 加西贝拉压缩机有限公司 | Air suction valve sheet structure for refrigeration compressor |
CN101943157B (en) * | 2010-09-27 | 2015-04-22 | 加西贝拉压缩机有限公司 | Air suction valve sheet structure for refrigeration compressor |
Also Published As
Publication number | Publication date |
---|---|
IT8521566A0 (en) | 1985-07-15 |
DE3526255A1 (en) | 1986-01-30 |
GB2165317B (en) | 1987-12-02 |
FR2568320A1 (en) | 1986-01-31 |
GB8517796D0 (en) | 1985-08-21 |
IT1200677B (en) | 1989-01-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |