DE2617079A1 - Cylinder head for piston compressor - has outlet valve in press. chamber accessible through cover having projection acting as valve stop - Google Patents

Abstract

The cylinder head (1) of a piston compressor, partic for the air brake installation of a motor vehicle, is directly, or via a single gasket, fitted on the cylinder block and hs ducts and recesses for the air and for coolant, and a press chamber (9) in which the outlet valve (4) is arranged. The lower face of the head is provided with ports (15, 18) for the outlet valve. The press chamber (9) is accessible from the outside via a cover plate (10). This plate hasa projection (11) extending into the chamber and acting as a stop to limit the opening of the outlet valve (7).

Description

Attachment to

Patent and utility model application for cylinder head covers the cylinder of a piston compressor The invention relates to a cylinder head cover for the cylinder of a piston compressor, in particular for compressed air braking devices of motor vehicles, with direct or only with the interposition of a seal carried out the installation of the cylinder head on the free end face of the cylinder and with channels and recesses for the throughput air and for a coolant as well with a pressure chamber intended for the compressed air delivered by the compressor, into the a pressure valve is used.

Such a cover is known (DT-OS 24 10 705).

In such compressors there is a problem, the pressure valve and Keeping the compressed air as cool as possible to avoid coking on the compressor piston and at the pressure valve and to protect the pressure valve from overheating.

In the known design, cooling fluid channels are provided, which are connected to the cooling water circuit of an internal combustion engine. at In this way, water-cooled internal combustion engines also become the coolant channels coolant flows through the cylinder head cover and the pressure valve is cooled. In some cases it can be useful to use cooling oil instead of cooling water, which is taken from the circuit of an internal combustion engine.

Often only air is used as a coolant.

In the known design, the cooling liquid channels are through two parallel holes formed in the lid between its lower surface and the The seat for the lamellar pressure valve run. This is a relative one good heat dissipation achieved, but the loss space not used for compression of the pressure valve is unduly large due to the cooling channels in between.

The invention is based on the object of avoiding this disadvantage and to create a cylinder head cover of the type mentioned, in which the Pressure valve to avoid volume loss close to the lower surface of the lid is arranged and where the heat dissipation is still best where the Most of the heat is generated, namely a-n on the underside of the lid and in the area of the Pressure valve. Thereby, no valve seat plate or its seals should prevent the heat flow hinder.

An exemplary embodiment is shown in the drawing 1 shows a cross section of the cover and FIG. 2 shows a partial section according to FIG Line 11-11 in Fig. 1.

In the case of a cylinder head cover i, channels 2 and 3 are for coolant led around a lamellar pressure valve 4 in an arc. The lamellar pressure valve 4 has a lamella 5 clamped in on one side, which is held by a screw 6 on a seat surface 7 is held, which is arranged very close to a lower surface 8 of the lid. There is no special valve seat plate. The lamella is the valve closing body.

The lamellar pressure valve 4 is arranged in a pressure chamber 9, the is closed to the outside by a closure plate 10. This plate 10 carries an approach li, which protrudes into the pressure chamber 9 and as a catcher for the lamella 5 serves. Such a design is advantageous because the pressure valve 4 is light from the outside is accessible and the sheet, umspülung'des pressure valve 4 such a centric Intervention on the pressure valve 4 allows easy.

A channel 18 leads to the pressure chamber 9, from the lower surface of the cover 1 is brought up and the connection from a compressor workspace to the Pressure chamber 9 produces.

The pressure chamber 9 has an outwardly leading compressed air connection 12, and a suction air port 13 is provided on the opposite side of the lid 1. This suction port 13 leads to a suction chamber 14, which via a channel 15 on the Lower surface 8 of the cover 1 into the compressor working space: opens out. At the mouth an inlet valve, not shown, is provided.

The coolant will. the channel 2 via an inlet connection 16 and discharged from channel 3 via an outlet connection 17- ^ X ^ ,, as Cooling liquid can be water or oil.

Instead of cooling liquid, air can also be used.

In this case, however, channels 2 and 3, including connections 16 and 17, are omitted and are replaced by cooling fins.

L e r s e i t e

Claims (3)

Claims 1. Cylinder head cover for the cylinder of a piston compressor, in particular for compressed air braking devices of motor vehicles, with direct or only with the interposition of a seal carried out system of the cylinder head on the free face of the cylinder and with channels and recesses for the Throughput air and for a coolant as well as with one for that conveyed by the compressor Compressed air specific pressure space in which a pressure valve is inserted, characterized in that that the cover (1) on its lower surface (8) only channels (15, 18) for the The suction and pressure valve (4) has that furthermore the pressure chamber (9) via a closure plate (10) is accessible from the outside and that a projection protruding into the pressure chamber (9) (11) the closing plate (10) lifting stop for the closing body (5) of the pressure valve (4) is. 2. cylinder head cover according to claim 1 with liquid as coolant, characterized in that the channels (2, 3) for the coolant are curved around the pressure valve (4) are arranged around. 3. cylinder head cover according to claim 2, characterized in that the cooling liquid channels (2, 3) are led out of the cover (1) at the side, without cutting its lower surface (8).