Reed valve assembly for a radial piston compressor, radial piston compressor, and method for mounting a reed valve assembly on a radial piston compressor

Abstract

The present invention relates to a reed valve assembly (4) for a radial piston compressor, the reed valve assembly (4) being equipped with a fastener (5) for fastening to the radial piston compressor, characterized in that the reed valve assembly (4) is equipped with a captive-retention means (6) for the fastener (5). The invention also relates to a radial piston compressor having a reed valve assembly according to the invention, and to a method for mounting a reed valve assembly (4) according to at least one of the preceding claims on a radial piston compressor according to at least one of the preceding claims, characterized by the following method steps: - arranging the fastener, in particular the screw (5), in the reed valve assembly (4) and holding the fastener, in particular the screw (5), by means of the captive-retention means (6); - mounting the reed valve assembly (4) on the radial piston compressor, in particular screwing the screw into the threaded hole provided therefor.

Description

[0001] Valve reed arrangement for a radial piston compressor, radial piston compressor and method for mounting a valve reed arrangement on a radial piston compressor

[0002] The present invention relates to a valve reed arrangement for a radial piston compressor according to the preamble of claim 1, a radial piston compressor according to the preamble of claim 8, and a method for assembling a valve reed arrangement on a radial piston compressor according to the preamble of claim 10.

[0003] DE 10 2020 208 699 A1 discloses a radial piston compressor comprising a pump shaft with an eccentric, and at least one piston-working chamber combination. The piston-working chamber combination comprises a working chamber and a piston. The radial piston pump comprises at least two piston-working chamber combinations extending radially from the pump shaft. Each working chamber is equipped with an outlet valve. The outlet valve comprises a valve opening and a valve tongue, the valve opening being selectively closed or opened by the valve tongue. The radial piston compressor proposed here is further characterized by being equipped with an annular valve tongue arrangement.

[0004] The advantage here is that all exhaust valves can be mounted together using a single sheet metal lamella or formed on such a sheet metal lamella, allowing all exhaust valves to be assembled together in just a few steps. Multiple parts can be avoided, thus reducing assembly effort and time.

[0005] Although an advantageous radial piston compressor is already proposed here, in particular a valve reed arrangement for a radial piston compressor is proposed which enables an improved assembly process in which as few parts as possible and thus little assembly time are required, there is still a need for improvement.

[0006] This is where the present invention comes in and sets itself the task of proposing an improved valve reed arrangement, in particular proposing a valve reed arrangement that can be assembled more advantageously, preferably more quickly and therefore more cost-effectively.

[0007] According to the invention, this object is achieved by a valve reed assembly having the characterizing features of claim 1. By providing the valve reed assembly with a retaining device for the fastening means, an assembly-friendly valve reed assembly can be provided. The valve reed assembly can be connected to the radial piston compressor as a prefabricated component. In principle, no additional fastening means or those that are separately provided during assembly are required for the assembly of the valve reed assembly. This allows the assembly process to be optimized, in particular, accelerated, and therefore more cost-effective.

[0008] Further advantageous embodiments of the proposed invention emerge in particular from the features of the subclaims. The subject matter and features of the various claims can, in principle, be combined with one another in any desired way.

[0009] In an advantageous embodiment of the invention, the valve reed arrangement can comprise one valve reed or a plurality of valve reeds in a carrier plate. The present invention can generally be applied to valve reed arrangements with a single valve reed, but also to valve reed arrangements with multiple valve reeds in a carrier plate. In the latter case, preferably several fastening means with corresponding anti-loss devices are arranged in the valve reed arrangement or the carrier plate.

[0010] In a further advantageous embodiment of the invention, the valve reed arrangement can be provided with a valve reed and a valve catcher. The opening angle of the valve reed can be advantageously adjusted via a valve catcher.

[0011] In a further advantageous embodiment of the invention, it can be provided that the fastening means is designed as a screw, wherein the valve tongue arrangement is equipped with an opening for receiving the screw, wherein the loss prevention device is designed to hold the screw in the opening, wherein the loss prevention device in particular comprises claws that project into the opening. The claws preferably form the opening at three points such that it is smaller than the thread diameter or the outer thread diameter of the screw, so that the thread of the screw has to bend open the three claws when pushed through and the claws "claw" onto the thread of the screw or are in engagement with it.

[0012] It can also preferably be provided that the screw is a so-called neck screw. Such a screw has no thread along the entire length of the screw shaft (up to the screw head), meaning that a portion of the length is unthreaded. Particularly preferably, this portion of the screw shaft without a thread has a smaller diameter than the outer thread diameter (undercut for the screw head support). The claws "relax" on the unthreaded section with a smaller diameter. The screw thread still secures the valve blade.

[0013] In an advantageous embodiment of the invention, it can be provided that the screw is screwed into or through the opening, wherein the claws are not bent or at least bent to a lesser extent.

[0014] In a further advantageous embodiment of the invention, it can be provided that the valve tongue comprises an opening and the valve carrier comprises an opening, wherein the openings are aligned and form the opening of the valve tongue assembly. Particularly in multi-layer valve tongue assemblies, the opening for receiving the fastening means, in particular the screw, can be formed by several aligned openings.

[0015] A further object of the present invention is to propose an improved radial piston compressor, in particular to propose a radial piston compressor which can be assembled more advantageously, preferably more quickly and therefore more cost-effectively.

[0016] According to the invention, this object is achieved by a radial piston compressor having the characterizing features of claim 8. By equipping the radial piston compressor with a valve reed arrangement according to the invention, the advantages mentioned above for the valve reed arrangement can be utilized for the radial piston compressor. This allows the assembly process to be optimized, in particular, accelerated, and therefore more cost-effective.

[0017] Further advantageous embodiments of the proposed invention emerge in particular from the features of the subclaims. The subject matter and features of the various claims can, in principle, be combined with one another in any desired way.

[0018] In an advantageous embodiment of the invention, the radial piston compressor can be equipped with at least one threaded bore for screwing in the screw of the valve reed assembly. A further object of the present invention is to propose an advantageous, particularly time-saving and therefore cost-effective, method for assembling a valve reed assembly on a radial piston compressor.

[0019] According to the invention, this object is achieved by a method having the method steps according to claim 10. By arranging the fastening means, in particular the screw, in the valve reed arrangement and holding the fastening means, in particular the screw, by the loss prevention device, and subsequently mounting the valve reed arrangement on the radial piston compressor, in particular screwing the screw into the threaded bore provided for this purpose, rapid assembly can be enabled since the required fastening means can be provided together with the valve reed arrangement.

[0020] Further features and advantages of the present invention will become clear from the following description of preferred embodiments with reference to the accompanying drawings.

[0021] Fig. 1 shows a radial piston pump according to the prior art in a schematic side view;

[0022] Fig. 2 is a perspective exploded view of a radial piston pump according to the invention (without pump shaft for illustrative purposes);

[0023] Fig. 3 is a sectional view of a radial piston pump according to the invention;

[0024] Fig. 4a is a side sectional view of a radial piston pump according to the invention;

[0025] Fig. 4b a detail "4b" according to Fig. 4a;

[0026] Fig. 5a is a partial view of a radial piston compressor according to the invention with a valve tongue arrangement according to the invention not yet mounted;

[0027] Fig. 5b is a partial view of a radial piston compressor according to the invention with a mounted valve reed arrangement according to the invention;

[0028] Fig. 6 is an exploded perspective view of a valve reed arrangement according to the invention;

[0029] Fig. 7a shows a valve tongue arrangement according to the invention in a side view;

[0030] Fig. 7b shows a valve reed arrangement according to the invention in a longitudinal section; Fig. 8a shows an embodiment of a valve reed arrangement according to the invention in a side view;

[0031] Fig. 8b shows an embodiment of a valve tongue arrangement according to the invention in a longitudinal section;

[0032] Fig. 9 a valve tongue arrangement in a view from above, without screw;

[0033] Fig. 10 a valve tongue of a valve tongue arrangement according to the invention.

[0034] The following reference symbols are used in the figures:

[0035] L Longitudinal axis of the radial piston pump

[0036] 1 pump shaft

[0037] 2 piston-working chamber combination

[0038] 3 housings

[0039] 4 valve reed arrangement

[0040] 5 Fasteners, especially screws

[0041] 6 Loss protection, especially claw(s)

[0042] 7 threaded hole

[0043] 8 Opening

[0044] 11 eccentric

[0045] 21 Workspace

[0046] 22 pistons

[0047] 23 cylinder head

[0048] 24 Exhaust valve

[0049] 41 Carrier plate

[0050] 42 valve catchers

[0051] 50 screw shaft with thread

[0052] 51 Screw shaft without thread

[0053] 53 screw head

[0054] 81 Opening in the valve catcher 82 Opening in the spring tongue

[0055] 241 Valve opening

[0056] 242 Valve reed / sheet metal reed

[0057] Features and details described in connection with a method naturally also apply in connection with the device according to the invention, and vice versa, so that with regard to the disclosure of the individual aspects of the invention, reference is always made to each other. Furthermore, a method according to the invention that may be described can be carried out with the device according to the invention.

[0058] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used herein, the singular forms "a" and "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It will also be understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of the recited features, integers, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed elements.

[0059] Reference is first made to Figs. 1 to 4b. A radial piston compressor is shown here to exemplify the intended use of the valve reed arrangement according to the invention, which will be explained in more detail below.

[0060] A radial piston compressor essentially comprises a pump shaft 1 with an eccentric 11, as well as at least one piston-working chamber combination 2. To define the axial direction, a longitudinal axis L of the pump shaft 1 is shown in Fig. 1. The piston-working chamber combination 2 essentially comprises a working chamber 21 and a piston 22. The working chamber 21 is closed at the head end with a cylinder head 23. As a rule, the radial piston pump comprises at least two piston-working chamber combinations 2, 2a, 2b, ..., which extend radially from the pump shaft 1. Preferably, the radial piston pump comprises at least three, preferably six, piston-working chamber combinations 2, 2a, 2b, ..., which extend correspondingly in a star shape from the pump shaft 1. The aforementioned components can be accommodated in a common housing 3.

[0061] According to one possible embodiment, indicated in Fig. 1, an outlet valve 24, preferably in the form of a spring-loaded valve, is provided in the cylinder head 23 or on the head side of the working chamber 21. The outlet valve 24 is preferably designed as a spring-loaded valve and comprises a valve opening 241, which can be selectively closed or opened by a valve tongue 242. In one possible embodiment, this valve opening 241 is generally aligned coaxially with the pump shaft 1.

[0062] In one embodiment, the radial piston compressor can be equipped with an annular valve reed arrangement 4. One possible embodiment of a valve reed arrangement 4 essentially comprises a carrier plate 41 and at least two valve reeds, preferably as many valve reeds 242 as there are outlet valves 24 or valve openings 241. The valve reeds 242 are preferably attached to the carrier plate 41, or the carrier plate 41 and valve reeds 242 are formed as a single piece. In terms of manufacturing technology, the valve reeds 242 are punched out of an annular, flat disc, preferably made of sheet metal.

[0063] In one embodiment, the valve opening 241 can be oriented axially, i.e., at 0° with respect to the longitudinal axis L of the shaft 1. In other words, the valve opening 241 is not oriented radially, but axially. The valve opening 241 is preferably provided in the wall of the working chamber 21. However, the valve opening 241 can also be oriented at an angle of 0° to 45° to the longitudinal axis L of the shaft 1.

[0064] The valve reed assembly 4 can then be arranged in front of all valve openings 241 in a single operation, eliminating the need to attach individual valve reeds to each exhaust valve 24. This results in a reduction in assembly effort.

[0065] Reference is made below to Fig. 5a.

[0066] Fig. 5a shows part of the housing 3 of the radial piston compressor. For illustrative purposes, a valve reed arrangement 4 is shown in a not yet assembled state, so that both a valve opening 241 and a threaded bore 7 for mounting the valve reed arrangement 4 can be seen. As can be seen here, it can alternatively also be provided that the valve reed arrangement 4 comprises only a single valve reed 242, which is correspondingly configured to open or close a valve opening 241. In this case, it is therefore provided that the valve reed is not part of a carrier plate 41, which comprises several valve reeds 242.

[0067] Fig. 6 shows an exploded view of a valve reed assembly. It can be seen that the valve reed assembly 4, in addition to the valve reed 242 itself, includes a valve catcher 42, which is configured to limit the bending angle of the valve reed 242, in particular to limit the opening angle of the valve reed 242.

[0068] According to the invention, the valve tongue arrangement is equipped with a fastening means 5 with a loss prevention device 6.

[0069] The fastening means can, as shown here, comprise a screw 5 that can be screwed into the associated threaded bore 7 on the housing 3. For this purpose, the valve tongue assembly 4 is provided with an opening 8, in particular a bore, through which the screw 5 can be inserted. The anti-loss device 6 for the fastening means 5, in this case for the screw inserted through the opening 8, comprises three claws 6, which preferably extend into the interior of the opening 8.

[0070] The claws 6 preferably form the opening 8 at three points such that it is smaller than the thread diameter or the outer thread diameter of the screw 5, so that the thread of the screw 5 must bend the three claws 6 when inserted through, and the claws 6 "claw" or engage with the thread of the screw 5. For example, for a screw M5 = 5 mm, a clear opening dimension of the claws of 4.7 mm would be desirable.

[0071] In a two-layer or even multi-layer valve reed arrangement 4, the opening 8 is formed by respectively aligned openings 81, 82 in the individual components of the valve reed arrangement, such as a first opening 81 in the valve reed 242 and a second opening 82 in the valve catcher 42. The claws 6 are preferably arranged in the second opening 82.

[0072] Fig. 7a shows a side view of an embodiment of the valve reed arrangement 4 according to the invention in an assembled state. The screw is inserted through the opening of the valve reed arrangement and is held in place by the captive device. Fig. 7b shows a longitudinal section of the valve reed arrangement 4 according to Fig. 7a. The screw 5 is inserted through the opening 8, or rather the opening in the valve catcher 81, as well as the opening in the spring tongue 82. The screw 5 has a thread 50, which extends in particular over the entire length of the screw shaft. The valve reed arrangement rests against the screw head 53. The claws 6 are in engagement with the thread 50.

[0073] Fig. 8a shows a side view of an embodiment of the valve reed assembly 4 according to the invention in an assembled state. The screw 5 is inserted through the opening of the valve reed assembly and is held in place by the captive retainer 6.

[0074] Fig. 8b shows a longitudinal section through the valve tongue arrangement 4 according to the invention shown in Fig. 8a. The screw 5 is inserted through the opening 8, or the opening in the valve catcher 81, as well as the opening in the spring tongue 82. The screw 5 has a thread 50 which preferably does not extend over the entire length of the screw shaft. The screw thus comprises a shaft region 51 on which no thread 50 is formed. The screw shaft 51 has a smaller diameter than the outer thread diameter of the screw 5. The diameter of the screw shaft 51 is preferably smaller than the opening 8, in particular the opening formed by the claws 6. The claws 6 can thus rest loosely or with play on the screw shaft 51. The screw shaft 51 ora loose movement of the screw 5 relative to the spring tongue 242 and the valve catcher 42 along the screw shaft 51 is limited axially by the screw head 53 and by the thread 50.

[0075] Fig. 9 shows a valve reed assembly 4 in a top view, without the screw. Here, the opening 8 with the claws 6 in the valve reed assembly 4 can be seen in particular. It can be seen that an opening 8 is provided both in the valve reed 242 and in the valve catcher 42. In conjunction with Fig. 10, in which a valve reed 242 of a valve reed assembly 4 according to the invention is shown from above, it can be seen that the claws 6 are provided in the opening 82 of the valve reed 242. Thus, for example, six claws can be provided in the total opening. The screw 5 is held captively in the opening 8 after being inserted through, and the valve reed assembly 4 can be supplied for assembly as a ready-to-assemble component including fastening means 5, for example, a screw. The following assembly method is therefore possible:

[0076] - arranging the fastening means, in particular the screw 5, in the valve tongue arrangement 4 and holding the fastening means, in particular the screw 5, by the loss prevention device 6;

[0077] - Mounting the valve tongue assembly 4 on the radial piston compressor, in particular screwing the screw into the threaded hole provided for it.

[0078] Sheet metal is the preferred material for the valve reed assembly 4 or valve reed 242 and, if applicable, the valve catcher 42. Other materials for both the valve reed and the valve catcher are also conceivable. It is advisable to design the valve catcher 42 from a slightly thicker or less elastic material.

Claims

Claims 1. Valve tongue arrangement (4) for a radial piston compressor, wherein the valve tongue arrangement (4) is equipped with a fastening means (5) for fastening to the radial piston compressor, characterized in that the valve tongue arrangement (4) is equipped with a loss prevention device (6) for the fastening means (5).

2. Valve tongue arrangement according to claim 1, characterized in that the valve tongue arrangement (4) comprises a valve tongue (242) or a plurality of valve tongues (242) in a carrier plate (41).

3. Valve tongue arrangement according to at least one of the preceding claims, characterized in that the valve tongue arrangement (4) comprises a valve tongue (242) and a valve catcher (42).

4. Valve tongue arrangement according to at least one of the preceding claims, characterized in that the fastening means is designed as a screw (5), wherein the valve tongue arrangement (4) is provided with an opening (8) for receiving the screw (5), wherein the loss prevention device (6) is designed to hold the screw (5) in the opening (8).

5. Valve tongue arrangement according to at least one of the preceding claims, characterized in that the loss prevention device comprises claws (6) which project into the opening (8).

6. Valve tongue arrangement according to at least one of the preceding claims, characterized in that the screw (5) is a screw with a continuous threaded shaft, the claws (6) being in engagement with the thread, or that the screw (5) is a neck screw, the claws (6) being in contact with the unthreaded section of the neck screw.

7. Valve tongue arrangement according to at least one of the preceding claims, characterized in that the valve tongue (242) comprises an opening (82) and the valve catcher (42) comprises an opening (81), wherein the openings (81, 82) are aligned and form the opening (8) of the valve tongue arrangement (4).

8. Radial piston compressor with at least one inlet valve and / or outlet valve (24) with a respective associated valve opening (241) which can be selectively opened or closed by a valve tongue arrangement (4), characterized by a valve tongue arrangement (4) according to at least one of the preceding claims.

9. Radial piston compressor according to claim 8, characterized in that the Radial piston compressor is equipped with at least one threaded bore (7) for screwing in the screw (5) of the valve tongue arrangement (4).

10. Method for assembling a valve tongue arrangement (4) according to at least one of the preceding claims on a radial piston compressor according to at least one of the preceding claims, characterized by the following method steps: - arranging the fastening means, in particular the screw (5), in the valve tongue arrangement (4) and holding the fastening means, in particular the screw (5), by means of the loss prevention device (6); - Mounting the valve tongue assembly (4) on the radial piston compressor, in particular screwing the screw into the threaded hole provided for this purpose.

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