JP2017523348A - Fully integrated cylinder head for compressor - Google Patents

Abstract

The present invention is a cylinder head (1) for a compressor (2), which is disposed in the cylinder head (1) and cools the cylinder head (1), a valve plate (4), It is related with a cylinder head (1) provided with. According to the invention, the cooling unit (3) and the valve plate (4) are fully integrated into the cylinder head (1) in a monolithic design.

Description

The present invention relates to a cylinder head for a compressor, the cylinder head including a cooling unit disposed on the cylinder head and cooling the cylinder head, and a valve plate.

  Modern commercial vehicles used in track or road traffic are equipped with partial systems that consume large amounts of compressed air. Examples of these partial systems include a service brake operated with compressed air and an air suspension. The supply of compressed air to these compressed air consumers is performed by a compressed air supply device having a compressor. Ambient air is inhaled by the compressor and compressed, removing foreign particles, such as oil or water, from the air in another component of the compressed air supply before use in the consumer.

  Modern compressors impose high demands on components such as valve plates, cooling units and cylinder heads as a result of ever-increasing demands for efficiency and predetermined compressed air outflow temperatures. These components are subjected to strong loads due to heat and mechanical loads caused by compression. In the known prior art, the valve plate, cooling unit and cylinder head are sealed and screwed together. Some variations of the solution are to integrate the cooling function into the cylinder head and omit the use of a separate cooling unit.

  In the field of discharge valves for piston compressors, there is an automatic reed valve as a generally known prior art. The reed valve is either fixed on one side or lifted along the guides on both sides. The reed valve is generally riveted onto a valve plate having a through opening and has an upper catch, a spring element and a valve lead.

DISCLOSURE OF THE INVENTION An object of the present invention is to provide an optimized cylinder head for a compressor that contributes to improved compressor performance and reduces the risk of leakage.

  The above problem is solved in the context of the characterizing part of claim 1 starting from the cylinder head described in the superordinate conceptual part of claim 1. Advantageous aspects of the invention can be taken from the subsequent dependent claims.

  According to the invention, the cooling unit and the valve plate are fully integrated into the cylinder head in a monolithic design. In other words, the cylinder head includes a cooling unit and a valve plate, and is formed as a single component. In terms of method technology, it is proposed that a fully integrated cylinder head including a cooling unit and a valve plate be manufactured by a monolithic design by a lost foam method or a generative method (generative method). Production methods such as rapid prototyping (Rapid Prototyping), stereolithography (Stereolithography), and manufacturing of monolithic cylinder heads by laser molding (Lasersinter) are particularly suitable for prototypes and small-scale production. For medium-volume production and higher mass production, the lost foam casting method is proposed.

  The lost foam casting method achieves a more complicated geometrical shape and a greater degree of freedom in construction than conventional casting methods. These structural advantages enable a new configuration that emphasizes the overall performance of the air guide passages and water passages in the cylinder head, thereby realizing improved performance of the overall compressor system.

  The integration of the cylinder head, cooling plate and valve plate and the reduced interface due to the monolithic design not only completely avoids the risk of tightness, but also when the cylinder head is not monolithically formed At least two seals located between the cooling plate and between the cooling plate and the valve plate are also eliminated. Furthermore, the integration of the cylinder head, the cooling unit and the valve plate eliminates the joint between the cylinder head and the cooling unit or between the cooling unit and the valve plate, and thus a continuous surface provided by screwing. There is also no need for pressure in this region, so material savings and weight savings are achieved by omitting the support structure. In addition to the reduction in post-processing and assembly work, the possibility of cost reduction due to the small number of parts cannot be ignored.

  Preferably, at least two cavities for accommodating one discharge valve unit are formed on the surface of the cylinder head facing the compressor. The discharge valve unit as a separate insert allows a relatively free material selection independent of the material of the fully integrated cylinder head. Since the load peaks occur in the area of the discharge valve, it is possible to aim at this point and use a more resistant material that meets local requirements.

  The discharge valve unit is particularly preferably welded or screwed into each cavity provided in the cylinder head. A laser welding method is particularly suitable for welding the discharge valve unit into each cavity provided in the cylinder head. The advantages are in particular rapid and precise processing, very good heat extraction and very high sealing properties. As an alternative possibility, screwing the discharge valve unit into the respective cavity provided in the cylinder head provides a more flexible choice of material pairs.

  More preferably, the discharge valve unit has a valve plate, and the valve plate is disposed in each cavity provided in the cylinder head. Furthermore, at least two guide pins for guiding at least one valve lead in the axial direction are arranged on the valve plate. Furthermore, at least two guide pins are arranged with a capture element forming at least one valve lead stop substantially parallel to the valve plate. At least one spring element for the return of at least one valve lead is arranged between the at least one valve lead and the capture element in the axial direction. At least one valve lead lifts against the pressure of the spring element from the valve plate when pressure is applied to the valve lead. At this time, at least one valve lead is in a state of being oriented parallel to the valve plate at any point in time, thereby achieving optimal outflow of air.

  In the following, further configurations for improving the invention will be described in detail with reference to three drawings together with a description of advantageous embodiments of the invention.

It is a side view of the compressor which concerns on this invention provided with the cylinder head and the piston housing shown partially cut away. FIG. 2 is a perspective view of a cylinder head according to the present invention shown in FIG. 1. It is a perspective view of the discharge valve unit concerning the present invention.

DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT As shown in FIG. 1, a compressor 2 according to the present invention is a monolithic (including a piston housing 13, a fully integrated cooling unit 3 and a valve plate 4. And a cylinder head 1 having a monolithic structure. The compressor 2 is driven via the shaft 14. Since the piston housing 13 is partially cut in the vicinity of the cylinder head 1, the piston chamber 15 can be seen. Inside the piston chamber 15, a piston not shown in the figure reciprocates in the axial direction.

  According to FIG. 2, the monolithic cylinder head 1 to be fully integrated has two cavities 6a, 7a, 7b, which accommodate one discharge valve unit 7a, 7b, respectively, not shown in the figure, on the face 5 towards the compressor 2. 6b. Both empty spaces 6a and 6b are used as compressed air discharge ports of the compressor 2 from a compression chamber not shown in the drawing. Further, on the surface 5 toward the compressor 2, eight suction ports 16a to 16h for supplying air, six openings 17a to 17f for cylinder head screws not shown in the figure, and ESS not shown in the figure are shown. -Two through holes 18a, 18b for the piston are formed. Thereby, this cylinder head 1 is suitable for the compressor 2 provided with ESS (Energy Saving System).

  FIG. 3 shows one of the two discharge valve units 7a, 7b that are configured identically. The discharge valve unit 7a has a valve plate 8 intended to be placed in each of the cavities 6a, 6b provided in the cylinder head 1. Two guide pins 9 a and 9 b for guiding the valve lead 10 in the axial direction are arranged on the valve plate 8. Furthermore, a catching element 11 forming a stopper for the valve lead 10 is arranged parallel to the valve plate 8 on the two guide pins 9a, 9b. A spring element 12 for returning the valve lead 10 is arranged between the valve lead 10 and the capture element 11 in the axial direction. The valve reed 10 lifts against the force of the spring element 12 from the valve plate 8 in parallel when pressure is applied to the valve reed 10, thus achieving an optimal outflow of air.

DESCRIPTION OF SYMBOLS 1 Cylinder head 2 Compressor 3 Cooling unit 4 Valve plate 5 Surface 6a, 6b Empty space 7a, 7b Discharge valve unit 8 Valve plate 9a, 9b Guide pin 10 Valve lead 11 Capture element 12 Spring element 13 Piston housing 14 Shaft 15 Piston chamber 16a-16h Suction port for air supply 17a-17f Opening 18a, 18b Through hole

Claims (10)

A cylinder head (1) for the compressor (2),
A cooling unit (3) disposed in the cylinder head (1) for cooling the cylinder head (1);
A valve plate (4);
In a cylinder head (1) comprising:
The cooling unit (3) and the valve plate (4) are fully integrated into the cylinder head (1) in a monolithic design,
A cylinder head (1) characterized by the above.   At least two voids (6a, 6b) for accommodating one discharge valve unit (7a, 7b) are formed on the surface (5) of the cylinder head (1) facing the compressor (2). The cylinder head (1) according to claim 1, wherein:   Each of the discharge valve units (7a, 7b) has a valve plate (8), and the valve plate (8) is provided in each of the spaces (6a, 6b) provided in the cylinder head (1). The cylinder head (1) according to claim 2, which is arranged in the cylinder).   Each discharge valve unit (7a, 7b) has at least two guide pins (9a, 9b) arranged on the valve plate (8), and the guide pins (9a, 9b) have at least 1 Cylinder head (1) according to claim 3, wherein one valve lead (10) is guided axially.   Each said discharge valve unit (7a, 7b) has a capture element (11) used as a stopper for said at least one valve lead (10), said capture element (11) being said valve plate ( Cylinder head (1) according to claim 4, wherein said cylinder head (1) is arranged on said at least two guide pins (9a, 9b) substantially parallel to 8).   Arranged between the at least one valve lead (10) and the capture element (11) in the axial direction is at least one spring element (12) for returning the at least one valve lead (10). The cylinder head (1) according to claim 5. A method for manufacturing a cylinder head (1) according to any one of the preceding claims,
A method of manufacturing the fully integrated cylinder head (1) comprising a cooling unit (3) and a valve plate (4) by a lost foam casting method with a monolithic design. A method for manufacturing a cylinder head (1) according to any one of the preceding claims,
A method of producing a fully integrated cylinder head (1) comprising a cooling unit (3) and a valve plate (4) by a monolithic design by a generating method.   Method according to claims 1 to 6, wherein each discharge valve unit (7a, 7b) is welded or screwed into the respective cavity (6a, 6b) provided in the cylinder head (1). .   Compressor (2) comprising a monolithic cylinder head (1) with a fully integrated cooling unit (3) and a valve plate (4).

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