WO2023072650A1

WO2023072650A1 - Outlet valve for a compressor

Info

Publication number: WO2023072650A1
Application number: PCT/EP2022/078794
Authority: WO
Inventors: Dominik Gschwender; Grzegorz BATYCKI
Original assignee: Aircom Automotive Sp. z o.o. Sp. k.
Priority date: 2021-10-28
Filing date: 2022-10-17
Publication date: 2023-05-04
Also published as: DE102021128196A1

Abstract

The invention relates to an outlet valve (10) for a compressor, comprising at least one inlet opening (20), which can be closed and opened by means of a sealing element (18), wherein, when the valve (10) is in a closed state in which the inlet opening (20) is closed, the sealing element (18) lies on the inlet opening (20), and when the valve (10) is in an open state in which the inlet opening (20) is open, the sealing element (18) is lifted as a result of a pressure increase in the cylinder chamber (2) in relation to the pressure in the volume (14) of the outlet valve (10) and thus opens the inlet opening (20), characterized in that the sealing element (18) is peripherally held between a cylinder housing (4) and a valve housing (12), and in that the sealing element (18) comprises at least one air through-opening (22) and, when the valve (10) is in the open state, compressed air flows from the cylinder chamber (2) through the inlet opening (20) and through the air through-opening (22) of the sealing element (18) into the volume (14) of the valve (10).

Description

Title : Outlet valve for a compressor

Description

The invention relates to an outlet valve for a compressor. Valves are known from the prior art which can be closed by means of a spring-loaded elastomer seal. When opening the valves, the force applied by the spring must be overcome.

The object of the invention is to improve a valve known from the prior art.

This problem is solved with an outlet valve having the features of claim 1 . The exhaust valve includes at least one inlet opening that can be closed and released by means of a sealing means, via which compressed air can flow from a cylinder chamber into a volume of the outlet valve that is connected to an outlet opening of the outlet valve, the sealing means being in a closed state of the valve in which the inlet opening is closed, rests at least partially on the inlet opening and in a release state of the valve in which the inlet opening is released, the sealing means is raised as a result of a pressure increase in the cylinder chamber in relation to the pressure in the volume of the outlet valve and thus releases the inlet opening. According to the invention, it is provided that the sealing means is held circumferentially between a cylinder housing that at least partially surrounds the cylinder chamber and a valve housing that at least partially surrounds the volume of the outlet valve, and that the sealing means comprises at least one air passage opening, with compressed air being released from the valve when the valve is in the released state Cylinder chamber flows through the inlet opening and through the air passage opening of the sealant into the volume of the valve. This allows the compressed air to flow out of the cylinder chamber into the volume of the valve.

The fact that the sealing means rests on the inlet opening when the valve is in a closed state also means that the sealing means rests on an edge surrounding the inlet opening or on a component providing the inlet openings. The sealing means advantageously comprises an elastic material, in particular an elastomer. Such materials are dimensionally stable but elastically deformable. This means that the plastics can deform elastically under tensile and compressive loads, but then return to their original, undeformed shape.

The sealant is held under preload between the cylinder body and the valve body. In the closed state of the valve, in which the inlet opening is closed, the valve rests on the inlet opening and thus seals off the cylinder chamber from the volume of the valve.

Compared to a valve known from the prior art with a spring-loaded seal, the valve according to the invention can open faster.

The inlet opening of the valve is advantageously provided in a plate. The plate together with the sealing means separates the cylinders from the volume of the valve. The plate, together with the sealing means, closes the cylinder chamber when the inlet opening in the plate is closed by sealing means. The plate is advantageously held together with the sealing means between the cylinder body and the valve body. The sealing means advantageously provides an airtight seal between the cylinder housing and the valve housing, in particular in the area in which the sealing means is held between the cylinder housing and the valve housing. In this context, it can prove to be advantageous if the sealing means comprises a sealing lip, in particular partially encompassing an edge of the plate. The sealing lip is advantageously arranged between the cylinder housing and the valve housing. In the event that the sealing lip engages the plate, the plate together with the sealing means is held circumferentially between the cylinder body and the valve body.

Because the seal between the cylinder chamber and the outlet valve is provided by the sealant, a mechanical connection between the cylinder housing and the valve housing only has to provide the required contact pressure on the sealant. However, the mechanical connection itself no longer has to provide an airtight seal. The sealing lip is elastic and can advantageously be compensated for the influence of manufacturing tolerances in the components.

Depending on the material of the cylinder and/or valve housing, the mechanical connection can be made, for example, by means of a welding process, in particular by means of ultrasonic welding. Ultrasonic welding is particularly useful for joining thermoplastic plastics and metallic materials suitable . Alternatively, the mechanical connection can also be provided by other joining methods. The fact that the mechanical connection between the cylinder and valve housing itself no longer has to provide an airtight seal means that the material and/or joining method can be selected flexibly. For example, cylinder and/or valve housings can be made of different materials and/or non-weldable materials.

The plate in which the inlet opening of the valve is provided advantageously comprises a heat-resistant material, in particular metal or a high-temperature thermoplastic. The plate is exposed to high temperatures due to the temperature increase of the compressed air during compression. Heat-resistant means high heat resistance. Due to the multi-part design of the outlet valve according to the invention, namely separate valve housing, separate cylinder housing and separate plate with inlet opening, the respective components can comprise different materials. According to a preferred embodiment, the plate is made of metal or a high-temperature thermoplastic, whereas the valve housing and cylinder housing are made of conventional or engineering plastics. This can prove beneficial as high temperature thermoplastics are more expensive compared to traditional or engineering plastics. If the entire exhaust valve is made of a high-temperature thermoplastic, there may be higher manufacturing costs processing temperatures special processing machines required .

According to one embodiment, it is provided that the plate has a thickness of 0.5 mm to 5 mm, in particular a thickness of 0.6 mm to 1.5 mm. The thinner the plate, the less air turbulence occurs in the area of the intake openings and the lower the air resistance. In this case it is advantageous if the plate is made of metal or a material with a similarly high strength. It is known from the prior art that the inlet opening is not provided in a separate plate but in the valve or cylinder housing itself. The housings are usually made of plastic. In this case, it is usually not possible to achieve thicknesses in the range from 0.5 mm to 5 mm, in particular 1 mm to 2 mm, but only greater thicknesses. In the case of greater thicknesses, the inlet opening is provided by a duct with a length corresponding to the thickness of the inlet openings, and air turbulence occurs in the region of the inlet openings, which is disadvantageous.

According to a further advantageous embodiment, it is provided that a projection is provided, in particular projecting into the volume of the valve, which limits lifting of the sealing means away from the inlet opening. The projection can for example be formed in such a way that the projection already contacts the sealing means in the closed state of the valve, in particular the sealing means in the direction of the Inlet openings and / or presses in the direction of the plate. Alternatively, the projection can also be designed in such a way that the projection is spaced apart from the sealing means in the closed state, and the sealing means in the released state in which the sealing means is raised as a result of an increase in pressure in the cylinder chamber in relation to the pressure in the volume of the outlet valve becomes . In this case the protrusion limits how far the sealing means can be lifted away from the inlet opening. Advantageously, faster closing of the valve can be achieved by the projection, compared to an embodiment in which no projection is provided.

According to a further advantageous embodiment, it is provided that the sealing means comprises at least one compensating collar, in particular circumferential, in particular curved or folded, in particular open in the direction of the inlet opening.

In particular, the compensating collar provides compensation for movements and/or for changes in the dimensions of the sealing means and/or for the influence of manufacturing tolerances on components of the exhaust air valve.

The compensating bell may provide a type of spring action. In the closed state of the valve, the inlet opening is closed by the sealant. Furthermore, the compensating bell can have a kind of joint effect provide . When the sealing means is lifted as a result of an increase in pressure in the cylinder chamber in relation to the pressure in the volume of the exhaust valve, the compensating sleeve provides the mobility.

Further, the compensating bell can provide compensation for thermal effects on the sealant. The need to compensate for the thermal effect arises from the wide operating temperature range of the valve, for example in the temperature range from -30°C to +280°C.

According to one embodiment, it can be provided that the sealing means comprises a reduced part, which is reduced in relation to a further part, with a prestress being provided by a force acting on the reduced part. The force is provided in particular by the plate.

This embodiment proves to be particularly advantageous in connection with the compensating cuff. In this context, it proves to be advantageous if a part of the sealing means arranged on one side of the compensating collar, in particular on the inside, is lower than a part arranged on the other side of the compensating bell, in particular on the outside. When assembling the sealing portion between the valve body and the cylinder body, a preload is provided by a force acting on the reduced portion. The preload allows the valve to close more quickly to be reached . Furthermore, a better seal with smaller pressure differences between the pressure in the cylinder chamber and the pressure in the volume of the valve can be achieved by the preload. Advantageously, improved sealing can thus be achieved at low pressures in the valve.

According to a further embodiment, it is provided that the sealing means comprises at least one further sealing lip on a side facing the inlet opening. This sealing lip is flexible and can deform, thereby providing an improved seal. In particular, unevenness in the material can be compensated for, and the influence of the evenness of the valve plate is reduced.

According to one embodiment, it can be provided that an air passage opening or several air passage openings are provided centrally or eccentrically in the sealing means. The path of the air flow within the exhaust air valve can be influenced by the arrangement. This can be advantageous in particular with regard to heat generation.

In the case of a centrically arranged air passage opening, the air flow is directed primarily in the middle through the volume of the valve. Compared to one or several eccentrically arranged air passage openings, there is a lower temperature increase in the surrounding components with a centric air passage opening. This can be particularly advantageous for thermoplastic components be . On the other hand, the released compressed air has a higher temperature in a centric arrangement than in an eccentric arrangement.

The various arrangements of the air passage openings can also be advantageous depending on an arrangement of exhaust air openings for discharging the compressed air from the volume of the valve. For example, in the case of exhaust air openings arranged on the side, the eccentric arrangement can be advantageous.

Further embodiments relate to one

Compressed air compressor comprising at least one cylinder-piston unit with an outlet valve according to the embodiments described. The exhaust valve closes the cylinder chamber. A plate of the exhaust valve is advantageously arranged on the cylinder chamber.

Further embodiments relate to a tire sealing and/or tire inflation device, comprising a compressed air compressor and/or an outlet valve according to the embodiments described.

These and other features of the invention also result from the following description as well as the drawing and the claims.

The invention is explained in more detail below with reference to a drawing. Show : Fig. 1 shows a schematic representation of an outlet valve;

Fig. 2 shows a further schematic representation of the outlet valve;

Fig. 3 shows a schematic representation of a detail of the outlet valve,

Fig. Figure 4 shows a schematic representation of a detail of the outlet valve according to a further one

Execution form in a first view,

Fig. 5 the detail from FIG. 4 in a second view,

Fig. 6 shows a schematic representation of a detail of the outlet valve according to a further embodiment,

Fig. 7 shows a schematic representation of a detail of the outlet valve according to a further embodiment,

Fig. 8 shows a schematic representation of a detail of the outlet valve according to a further embodiment, and Fig. 9 shows a schematic representation of a compressed air supply system with a sealing liquid container and a tire.

Figure 1 shows an outlet valve for a compressor. The outlet valve is provided with the reference numeral 10 in its entirety.

The outlet valve is as shown

Arranged from an embodiment on a cylinder chamber 2 of the compressor. The cylinder chamber 2 is surrounded by a cylinder housing 4 .

A piston (not shown) for generating compressed air is arranged in the cylinder housing 4 .

The valve 10 includes a valve body 12 . The valve housing 12 surrounds a volume 14 of the valve.

Volume 14 is separated from cylinder chamber 2 by plate 16 and sealing means 18 .

The sealing means 18 advantageously comprises an elastic material, in particular an elastomer, for example silicone rubber.

The plate 16 comprises according to the illustrated

The embodiment has two inlet openings 20 via which compressed air can enter the volume 14 of the valve from the cylinder chamber 2 . FIG. 1 shows the outlet valve 10 when the valve 10 is in a closed state.

In the closed state of the valve, the sealing means 18 rests on the inlet openings 20 and closes them.

The sealing means 18 is held circumferentially between the cylinder housing 4 and valve housing 12 . According to the embodiment shown, the sealing means 18 is held under pretension between the cylinder housing 4 and the valve housing 12 . In this way it is ensured that sealing means 18 rests on the inlet openings 20 in the closed state and closes them.

FIG. 2 shows the outlet valve 10 when the valve 10 is in a release state.

In the released state, the inlet openings 20 are released. The sealing means 18 is lifted as a result of an increase in pressure in the cylinder chamber in relation to the pressure in the volume 14 of the outlet valve and in this way uncovers the inlet openings 20 . According to the embodiment shown, the sealing means 18 comprises two air passage openings 22 . In the release state of the valve 10, compressed air flows from the cylinder chamber 2 through the inlet ports 20 and through the air passage openings 22 of the sealing means 18 into the volume 14 of the valve 10 .

The sealing means 18 is held circumferentially between the cylinder housing 4 and valve housing 12 . According to the illustrated embodiment, the sealing means 18 includes a peripheral sealing lip 24 . The sealing lip 24 grips an edge of the plate 16 so that the plate 16 is held circumferentially between the cylinder housing 4 and the valve housing 12 together with the sealing means 18 .

This provides a seal between the cylinder chamber 2 and the volume 14 of the valve 10 . A mechanical connection between the cylinder housing 4 and the valve housing 12 provides the required contact pressure on the sealing means 18 . However, the mechanical connection itself no longer has to provide an airtight seal.

Depending on the material of the cylinder and/or valve housing 12, the mechanical connection can be produced, for example, by means of a welding process, in particular by means of ultrasonic welding.

Ultrasonic welding is particularly suitable for joining thermoplastics and metallic materials. Alternatively, the mechanical connection can also be provided by other joining methods. Due to the fact that the mechanical connection of the cylinder and valve housing 4, 12 itself is no longer an airtight seal must provide, the choice of material and/or joining method can be made flexibly.

According to the embodiment shown, the cylinder housing 4 includes a contact area 26 for the sealing means 18 .

According to the embodiment shown in FIGS. 1 and 3, the sealing means 18 comprises a circumferential groove 28 into which a correspondingly complementary projection 30 of the valve housing 12 engages. There are too

Embodiments without a groove 28 and projection 30 are conceivable.

Alternatively, the contact area can also be provided by the valve housing 12 and the projection can also be provided by the cylinder housing 4 .

FIG. 3 shows the sealing means 18 on the plate 16 in a view from above. A large number of air passage openings 22 is shown as an example.

The plate 16 advantageously comprises a heat-resistant material such as metal or a high-temperature thermoplastic.

A thickness a of the plate 16 is indicated in FIG. 1, for example. The thickness is advantageously 0.5 mm to 5 mm, in particular 0.6 mm to 1.5 mm. According to those shown in Figures 1 and 2

In some embodiments, the outlet valve includes a protrusion 32 that limits lifting of the sealant 18 away from the inlet ports 20 . According to the embodiment shown, the projection 32 protrudes into the volume 14 of the valve 10 . The projection 32 is, for example, arranged centrally, in particular in the middle when viewed from above.

According to the illustrated embodiment, the projection 32 is designed in such a way that the projection 32 is already in the closed state of the valve, cf. FIG. 1, the sealant 18 contacts, in particular the sealant 18 is pressed in the direction of the inlet openings 20 and in the direction of the plate 16 . The protrusion 32 limits how far the sealant 18 can be lifted away from the inlet ports 20 . Advantageously, a faster closing of the valve 10 can be achieved by the projection 32 compared to an embodiment in which no projection 32 is provided.

It is also shown in FIGS. 1 and 2 that the sealing means 18 has a further sealing lip 34 or includes two sealing lips. The sealing lips seal the inlet opening 20 in the closed state. FIGS. 4 and 5 show the sealing means 18 on the plate 16 according to a further embodiment in an oblique sectional view and in a sectional view.

According to the illustrated embodiment, the sealing means 18 comprises a compensating collar 36 . The compensating cuff 36 is according to that shown

Design bent in a U-shape and open in the direction of the side facing the inlet opening. The compensating collar 36 is a folded bead that is in particular circumferential.

According to FIGS. 4 and 5, the sealing means 18 comprises a plurality of air passage openings 22 which are arranged eccentrically on the sealing means 18 .

According to Figures 6 and 7, the sealing means 18 comprises an air passage opening 22 and 22 respectively. several air passage openings 22 which are arranged centrally in the sealing means 18 .

The arrangement of the air passage opening 22 or of the air passage openings 22, the path of the air flow within the exhaust air valve 10 can be influenced.

Fig. 8 shows an embodiment of the sealing means 18 . The part 38 of the sealing means 18 arranged on one side of the compensating collar 36, in particular on the inside, is lower than a part 40 arranged on the other side of the compensating collar 36, in particular on the outside. A prestress can thereby be provided. During assembly of the sealing means 18 between the valve housing 12 and the cylinder housing 4 , a preload is provided by a force acting on the reduced part 38 . The lowered part 38 is pressed upwards in the installed state by the acting force.

Finally, FIG. 9 shows a schematic representation of a compressed air supply system 40, which has a sealing liquid container 42 with a sealed or connected to zupumpeden Luftrei fen 44. According to the representation, the sealing liquid container 42 is coupled directly to the compressed air supply system 40 . Alternatively, the sealing liquid container 42 can also be connected to the compressed air supply system 40 via a further connection element (not shown). In systems according to the embodiment shown, compressed air for the introduction of sealing liquid and additional compressed air for distributing the sealing liquid in the air tire are provided by the compressed air supply system 40 , the compressed air being routed through the sealing liquid container 42 .

The sealing liquid container 42 is connected, for example, with an air inlet opening to a compressor of the compressed air supply system 40 and with an outlet opening through which an air

/dense liquid mixture can escape with the tires tied together . The compressor, in particular a compressor of the compressor, is driven by an electric motor, for example. The compressor of the compressed air supply system 40 advantageously includes an outlet valve according to the embodiments described in connection with FIGS.

Alternatively, the compressed air supply system 40 can also be connected directly to the air tire 44 to be pumped up.

Claims

Claims Outlet valve (10) for a compressor, comprising at least one inlet opening (20) which can be closed and opened by means of a sealing means (18) and via which compressed air from a cylinder chamber (2) enters a volume (14) connected to an outlet opening of the outlet valve (10). of the outlet valve, the sealing means (18) resting at least partially on the inlet opening (20) when the valve (10) is in a closed state, in which the inlet opening (20) is closed, and in a release state of the valve (10) , in which the inlet port (20) is uncovered, the sealing means (18) is raised as a result of an increase in pressure in the cylinder chamber (2) in relation to the pressure in the volume (14) of the outlet valve and thus unblocks the inlet port (20), characterized that the sealing means (18) is held circumferentially between a cylinder housing (4) at least partially surrounding the cylinder chamber (2) and a valve housing (12) at least partially surrounding the volume (14) of the outlet valve, and that the sealing means (18) has at least one Air passage opening (22), wherein in the release state of the valve (10) compressed air from the cylinder chamber (2) through the inlet opening (20) and through the air passage opening (22) of the Sealing agent (18) flows into the volume (14) of the valve (10). Exhaust valve (10) according to claim 1, characterized in that the sealing means (18) comprises an elastic material. Exhaust valve (10) according to one of Claims 1 or 2, characterized in that the sealing means (18) is held under prestress between the cylinder housing (4) and the valve housing (12). Outlet valve (10) according to one of the preceding claims, characterized in that the at least one inlet opening (20) of the valve (10) is provided in a plate (16). Outlet valve (10) according to Claim 4, characterized in that the sealing means (18) comprises a sealing lip (24) which in particular partially encompasses an edge of the plate (16). Outlet valve (10) according to any one of claims 4 or 5, characterized in that the plate (16) comprises a heat-resistant material, in particular metal. Outlet valve (10) according to one of Claims 4 to 6, characterized in that the plate (16) has a thickness of 0.5 mm to 5 mm, in particular a thickness of 0.6 mm to 1.5 mm. Outlet valve (10) according to one of the preceding claims, characterized in that a projection (32) is provided which projects in particular into the volume (14) of the valve and limits lifting of the sealing means (18) away from the inlet opening (20). . Outlet valve (10) according to any one of the preceding claims, characterized in that the sealing means comprises at least one, in particular peripheral, in particular curved or folded, in particular in the direction of the inlet opening (20) open compensating collar (36). . Exhaust valve (10) according to any one of the preceding claims, characterized in that the sealing means (18) comprises a reduced portion (38) which is reduced in relation to a further portion (40), wherein by a force acting on the reduced portion (40). a preload is provided. . Outlet valve (10) according to one of the preceding claims, characterized in that the sealing means (18) comprises at least one further sealing lip (34) on a side facing the inlet opening (20). . Outlet valve (10) according to one of the preceding claims, characterized in that one air passage opening (22) or several air passage openings (22) are provided centrally or eccentrically in the sealing means (18). . Compressed air compressor comprising at least one cylinder-piston unit, characterized in that the compressed air compressor comprises an outlet valve (10) according to one of claims 1 to 12. . Tire sealing and/or tire inflation device comprising a compressed air compressor according to claim 13 and/or a discharge valve (10) according to any one of claims 1 to 12.