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

Abstract

The invention relates to a reed valve assembly (4) for a radial piston compressor, which reed valve assembly (4) is provided with fasteners (5) for fastening to the radial piston compressor, characterized in that the reed valve assembly (4) is provided with captive retention means (6) for the fasteners (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, the method is characterized by the following method steps: arranging a fastener, in particular a screw (5), in the reed valve assembly (4) and retaining the fastener, in particular the screw (5), by means of a capture retaining device (6); mounting the reed valve assembly (4) on the radial piston compressor, in particular screwing a screw into a threaded bore provided for the reed valve assembly (4).

Description

Technical Field

[0001] The present invention relates to a reed valve assembly for a radial reciprocating compressor according to the preamble of claim 1, a radial reciprocating compressor according to the preamble of claim 8, and a method for mounting a reed valve assembly on a radial reciprocating compressor according to the preamble of claim 10. Background Technology

[0002] DE 10 2020 208 699 A1 discloses a radial reciprocating compressor comprising a pump shaft with an eccentric element and at least one piston / working chamber assembly, wherein the piston / working chamber assembly includes a working chamber and a piston, wherein the radial reciprocating pump includes at least two piston / working chamber assemblies extending radially from the pump shaft, wherein each working chamber is provided with an outlet valve, wherein the outlet valve includes a valve opening and a valve reed, wherein the valve opening can be selectively closed or exposed by the valve reed. The radial reciprocating compressor proposed herein is further characterized by having an annular reed valve assembly.

[0003] The advantage here is that all outlet valves can be mounted together using the sheet metal to be assembled, or can be formed on such sheet metal, and therefore all outlet valves can be installed together in a few steps. Multiple parts can be avoided, thus reducing assembly workload and time.

[0004] Even though advantageous radial reciprocating compressors have been proposed here, and in particular a reed valve assembly for radial reciprocating compressors that enables an improved assembly process requiring as few parts as possible and therefore requiring very little assembly time, improvements are still needed.

[0005] This is the starting point of the present invention, the purpose of which is to provide an improved reed valve assembly, and in particular a reed valve assembly that can be assembled in a more advantageous manner (preferably in a faster and therefore cheaper manner). Summary of the Invention

[0006] According to the invention, this objective is achieved by a reed valve assembly having the features of claim 1. Because the reed valve assembly is provided with a restraining and retaining device for fasteners, it can be provided as an easily assembled reed valve assembly. The reed valve assembly can be connected to a radial piston compressor as a pre-assembled component. Essentially, the installation of the reed valve assembly does not require any additional fasteners or fasteners that must be supplied separately during assembly. This optimizes the assembly process, making it faster and therefore cheaper.

[0007] Further advantageous embodiments of the invention will become apparent, particularly from the features in the dependent claims. In principle, various items or features in the various claims can be combined as needed.

[0008] In an advantageous embodiment of the invention, the reed valve assembly may include one or more valve reeds in the carrier plate. In principle, the invention is applicable to reed valve assemblies having a single valve reed, but it is also applicable to reed valve assemblies having multiple valve reeds in the carrier plate. In the latter case, it is preferable to arrange multiple fasteners with corresponding restraining and retaining devices in the reed valve assembly or the carrier plate.

[0009] In another advantageous embodiment of the invention, the reed valve assembly may include a valve reed and a valve stop. The valve stop allows for the advantageous setting of the opening angle of the valve reed.

[0010] In another advantageous embodiment of the invention, the fastener may be configured as a screw, wherein the reed valve assembly has an opening for receiving the screw, wherein a restraining retaining device is designed to hold the screw in the opening, wherein, in particular, the restraining retaining device includes claws protruding into the opening. The claws preferably shape the opening in three locations such that the opening is smaller than the thread diameter or thread outer diameter of the screw, such that when the screw is pushed through, the screw's thread must bend and open the three claws, and the claws "dig into" or engage with the screw's thread.

[0011] Also preferably, the screw can be configured as a "ringed screw". This type of screw is not threaded along its entire length (as far as the screw head), or in other words, a portion of its length is unthreaded. Particularly preferably, the diameter of this unthreaded portion of the screw shaft is smaller than the outer diameter of the thread (the undercut for screw head support). The claws "relax" on the smaller diameter unthreaded sub-section. However, the screw threads still hold the valve spring in place.

[0012] In an advantageous embodiment of the invention, the screw can be screwed into or through the opening, wherein, during this process, the claw does not bend open or bends open less.

[0013] In another advantageous embodiment of the invention, the valve reed may include an opening, and the valve stop may include an opening, wherein the respective openings are aligned and form the opening of the reed valve assembly. Particularly in the case of a multi-layer reed valve assembly, the opening for receiving fasteners, particularly screws, may be formed by a plurality of aligned openings.

[0014] Another object of the present invention is to provide an improved radial piston compressor, and in particular a radial piston compressor that can be assembled in a more advantageous manner, preferably more quickly and therefore cheaper.

[0015] According to the invention, this objective is achieved by a radial piston compressor having the features of claim 8. Since the radial piston compressor is equipped with a reed valve assembly according to the invention, the aforementioned advantages of the reed valve assembly can be applied to the radial piston compressor. This optimizes the assembly process, making it faster and therefore cheaper.

[0016] Further advantageous embodiments of the proposed invention will become apparent, particularly from the features in the dependent claims. In principle, various items or features in the various claims can be combined as needed.

[0017] In an advantageous embodiment of the invention, the radial piston compressor may be provided with at least one threaded hole for screwing in a screw for a reed valve assembly.

[0018] Another object of the present invention is to provide an advantageous, particularly time-saving and therefore inexpensive method for installing reed valve assemblies on radial piston compressors.

[0019] According to the invention, this objective is achieved by a method having the steps of claim 10. By arranging fasteners, particularly screws, in the reed valve assembly and using restraining devices to hold the fasteners, particularly the screws, in place, and then mounting the reed valve assembly onto a radial piston compressor, particularly by screwing the screws into threaded holes provided for them, rapid assembly can be achieved since the required fasteners can be supplied together with the reed valve assembly. Attached Figure Description

[0020] Further features and advantages of the invention will become apparent from the following description of preferred exemplary embodiments, with reference to the accompanying drawings. In the drawings...

[0021] Figure 1 A schematic diagram of a radial piston pump according to the prior art, viewed from the side, is shown.

[0022] Figure 2 An exploded perspective view of the radial piston pump according to the present invention is shown (the pump shaft is not shown for illustrative purposes).

[0023] Figure 3 A cross-sectional view of a radial piston pump according to the present invention is shown;

[0024] Figure 4a A cross-sectional view of the radial piston pump according to the invention, viewed from the side, is shown;

[0025] Figure 4b It shows that according to Figure 4a The details of "4b";

[0026] Figure 5aA partial view of a radial piston compressor according to the invention is shown, the compressor having a reed valve assembly according to the invention not yet installed;

[0027] Figure 5b A partial view of a radial piston compressor according to the invention is shown, the compressor having an installed reed valve assembly according to the invention.

[0028] Figure 6 An exploded perspective view of a reed valve assembly according to the present invention is shown;

[0029] Figure 7a A view taken from the side shows a reed valve assembly according to the invention;

[0030] Figure 7b A reed valve assembly according to the invention is shown in longitudinal section;

[0031] Figure 8a An embodiment of the reed valve assembly according to the invention is shown in a view taken from the side;

[0032] Figure 8b An embodiment of the reed valve assembly according to the invention is shown in longitudinal section;

[0033] Figure 9 The reed valve assembly is shown in a view taken from above; screws are not shown.

[0034] Figure 10 A valve reed of a reed valve assembly according to the present invention is shown.

[0035] The following figure references are used in the accompanying drawings:

[0036] The longitudinal axis of the L-shaped radial piston pump

[0037] 1 Pump Shaft

[0038] 2-piston / working chamber combination

[0039] 3 shells

[0040] 4-reed valve assembly

[0041] 5. Fasteners, especially screws

[0042] 6. Restraining and retaining devices, especially (one or more) claws

[0043] 7 threaded holes

[0044] 8 openings

[0045] 11 eccentric parts

[0046] 21 working chambers

[0047] 22 pistons

[0048] 23 cylinder head

[0049] 24 outlet valve

[0050] 41 bearing plate

[0051] 42 valve stop

[0052] 50 threaded screw shafts

[0053] 51. Unthreaded screw shaft

[0054] 53 screw head

[0055] The opening in the stop of valve 81

[0056] The opening in the 82 valve spring

[0057] 241 valve opening

[0058] 242 valve spring / metal spring Detailed Implementation

[0059] In this context, the features and details described in connection with the method also apply to the device according to the invention, and vice versa; therefore, disclosures regarding various aspects of the invention may be referenced to each other, or always may be referenced to each other. Furthermore, any method according to the invention that can be described can be performed using the device according to the invention.

[0060] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this disclosure. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that, when used in this specification, the expressions “having” and / or “having” specify the presence of the indicated feature, integer, step, operation, element, and / or component, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or combinations thereof. As used herein, the term “and / or” includes any and all combinations of one or more of the associated enumerated elements.

[0061] In the first case, refer to Figures 1 to 4b Here, a radial piston compressor is illustrated to illustrate, by way of example, the reed valve assembly according to the invention to be explained in detail.

[0062] A radial reciprocating compressor basically comprises a pump shaft 1 with an eccentric element 11 and at least one piston / working chamber assembly 2. To define the axial direction, in Figure 1The longitudinal axis L of the pump shaft 1 is depicted. The piston / working chamber assembly 2 essentially comprises a working chamber 21 and a piston 22. The working chamber 21 is closed at the cylinder head by means of a cylinder head 23. Generally, a radial piston pump includes at least two piston / working chamber assemblies 2, 2a, 2b... extending radially from the pump shaft 1. A radial piston pump preferably includes at least three, preferably six, piston / working chamber assemblies 2, 2a, 2b..., which extend from the pump shaft 1 in a star shape accordingly. The above components can be housed in a common housing 3.

[0063] According to Figure 1 In one possible embodiment indicated, the outlet valve 24 (preferably in the form of a leaf spring valve) is disposed in the cylinder head 23 or at the head of the working chamber 21. The outlet valve 24 is preferably embodied as a leaf spring valve and includes a valve opening 241 that is selectively closed or exposed by a valve spring 242. In one possible embodiment, the valve opening 241 is generally aligned coaxially with the pump shaft 1.

[0064] In one embodiment, the radial piston compressor may be provided with an annular reed valve assembly 4. One possible embodiment of the reed valve assembly 4 essentially comprises a support plate 41 and at least two valve reeds, preferably having the same number of valve reeds 242 as the outlet valve 24 or valve opening 241. The valve reeds 242 are preferably attached to the support plate 41, or the support plate 41 and the valve reeds 242 are integrally formed. In terms of manufacturing, the valve reeds 242 are stamped from an annular flat disc, preferably made of sheet metal.

[0065] In one embodiment, the valve opening 241 can be aligned in the axial direction, i.e., at 0° relative to the longitudinal axis L of shaft 1. In other words, the valve opening 241 is aligned axially rather than radially. The valve opening 241 is preferably disposed in the wall of the working chamber 21. However, the valve opening 241 can also be aligned at an angle of 0° to 45° relative to the longitudinal axis L of shaft 1.

[0066] The reed valve assembly 4 can then be arranged in front of all valve openings 241 in a single working step, eliminating the need for a separate valve reed on each outlet valve 24. This results in a reduction in assembly workload.

[0067] The following is for reference. Figure 5a .

[0068] Figure 5aA portion of the housing 3 of the radial reciprocating compressor is depicted. For illustrative purposes, the reed valve assembly 4 is shown in its pre-assembly state, and thus the valve opening 241 and the threaded hole 7 for mounting the reed valve assembly 4 are visible. As can be seen here, it is also possible to alternatively make the reed valve assembly 4 consist of only a single valve reed 242, which is accordingly designed to expose or close the valve opening 241. Therefore, in this case, it is conceivable that the valve reed is not part of the support plate 41 comprising multiple valve reeds 242.

[0069] Figure 6 The reed valve assembly is depicted in an exploded view. As can be seen, in addition to the valve reed 242 itself, the reed valve assembly 4 also includes a valve stop 42, which is designed to limit the bending angle of the valve reed 242, and in particular, to limit the opening angle of the valve reed 242.

[0070] According to the present invention, it is conceivable that a reed valve assembly is equipped with a fastener 5 having a restraining and retaining device 6.

[0071] As illustrated here, the fastener may include a screw 5, which can be screwed into an associated threaded hole 7 in the housing 3. For this purpose, the reed valve assembly 4 is provided with an opening 8, specifically a hole, through which the screw 5 can be inserted. The restraining and retaining device 6 for the fastener 5 (in this case, for the screw inserted through the opening 8) includes three claws 6, which preferably extend into the interior of the opening 8.

[0072] The claws 6 preferably form openings 8 in three locations, such that the openings 8 are smaller than the thread diameter or outer thread diameter of the screw 5, so that when the screw 5 is pushed through, the thread of the screw 5 must cause the three claws 6 to bend and open, and the claws 6 "dig into" or engage with the thread of the screw 5. In the case of an M5 = 5 mm screw, for example, the desired net opening size of the claws is 4.7 mm.

[0073] In the case of a double-layer or even multi-layer reed valve assembly 4, the opening 8 is formed by corresponding aligned openings 81, 82 in the various components of the reed valve assembly, such as the first opening 81 in the valve reed 242 and the second opening 82 in the valve stop 42. The claw 6 is preferably arranged in the second opening 82.

[0074] Figure 7a An embodiment of the reed valve assembly 4 according to the invention is illustrated in an assembled state, viewed from the side. A screw has been inserted through an opening in the reed valve assembly and is held in place by a restraining retaining device.

[0075] Figure 7b The longitudinal cross-section diagram is shown. Figure 7aThe reed valve assembly 4 according to the invention is shown. A screw 5 is inserted through an opening 8 or an opening 81 in the valve stop and an opening 82 in the spring reed. The screw 5 has a thread 50 that extends specifically along the entire length of the screw shaft. The reed valve assembly abuts against the screw head 53. A claw 6 engages with the thread 50.

[0076] Figure 8a An embodiment of the reed valve assembly 4 according to the invention is illustrated in an assembled state, viewed from the side. A screw 5 is inserted through an opening in the reed valve assembly and held by a restraining retaining device 6.

[0077] Figure 8b The longitudinal cross-section diagram is shown. Figure 8a The reed valve assembly 4 according to the invention is shown. A screw 5 is inserted through an opening 8 or an opening 81 in the valve stop and an opening 82 in the spring reed. The screw 5 has a thread 50, which preferably does not extend along the entire length of the screw shaft. Therefore, the screw includes a shaft region 51 on which no thread 50 is formed. The diameter of the screw shaft 51 is smaller than the outer diameter of the screw 5's thread. The diameter of the screw shaft 51 is preferably smaller than the opening 8, particularly the opening formed by the claw 6. Therefore, the claw 6 can abut against the screw shaft 51 in a relaxed state or with a gap. The loosening movement of the screw shaft 51 or the screw 5 relative to the spring reed 242 and the valve stop 42 along the screw shaft 51 is axially restricted by the screw head 53 and the thread 50.

[0078] Figure 9 The reed valve assembly 4 is illustrated in a top view, without screws. Here, the opening 8 with a claw 6 in the reed valve assembly 4 is particularly visible. It can be seen that the opening 8 is located both in the valve reed 242 and in the valve stop 42. When... Figure 10 When viewed together, in which the valve spring 242 of the reed valve assembly 4 according to the invention is depicted from above, it can be seen that the claws 6 are disposed in the opening 82 of the valve spring 242. Therefore, for example, six claws can be disposed throughout the opening.

[0079] After passing through, the screw 5 remains confined in the opening 8, and the reed valve assembly 4 can be fed into the assembly as a component ready for assembly (including fasteners 5, such as screws). Therefore, the following assembly method can be considered:

[0080] - Fasteners, especially screws 5, are arranged in the reed valve assembly 4 and the fasteners, especially screws 5, are held in place by means of the restraining and retaining device 6;

[0081] - Install the reed valve assembly 4 on the radial piston compressor, specifically by screwing the screw into the threaded hole provided for it.

[0082] Sheet metal is a preferred material for the reed valve assembly 4 or valve reed 242 and possibly the valve stop 42. Other materials are also conceivable for both the valve reed and the valve stop. It would be suitable to form the valve stop 42 from a slightly thicker or less elastic material.

Claims

1. A reed valve assembly (4) for a radial piston compressor, wherein, The reed valve assembly (4) is provided with fasteners (5) for fastening to a radial piston compressor, characterized in that the reed valve assembly (4) is provided with a restraining and retaining device (6) for the fasteners (5).

2. The reed valve assembly according to claim 1, characterized in that, The reed valve assembly (4) includes one or more valve reeds (242) in the carrier plate (41).

3. The reed valve assembly according to at least one of the preceding claims, characterized in that, The reed valve assembly (4) includes a valve reed (242) and a valve stop (42).

4. The reed valve assembly according to at least one of the preceding claims, characterized in that, The fastener is configured as a screw (5), wherein the reed valve assembly (4) is provided with an opening (8) for receiving the screw (5), wherein the restraining retaining device (6) is designed to hold the screw (5) in the opening (8).

5. The reed valve assembly according to at least one of the preceding claims, characterized in that, The restraint device includes a claw (6) that extends into the opening (8).

6. The reed valve assembly according to at least one of the preceding claims, characterized in that, The screw (5) is a screw with a continuous threaded shaft, wherein the claw (6) engages with the thread, or the screw (5) is a ring screw, wherein the claw (6) abuts against the unthreaded portion of the ring screw.

7. The reed valve assembly according to at least one of the preceding claims, characterized in that, The valve reed (242) includes an opening (82), and the valve stop (42) includes an opening (81), wherein the openings (81, 82) are aligned and form the opening (8) of the reed valve assembly (4).

8. A radial piston compressor having at least one inlet valve and / or outlet valve (24), each having an associated valve opening (241) that can be selectively opened or closed by a reed valve assembly (4), characterized in that The reed valve assembly (4) as described in at least one of the preceding claims.

9. The radial piston compressor according to claim 8, characterized in that, The radial piston compressor is provided with at least one threaded hole (7) for screwing in the screw (5) of the reed valve assembly (4).

10. A method for mounting a reed valve assembly (4) as described in at least one of the preceding claims on a radial piston compressor as described in at least one of the preceding claims, characterized in that... The following are the steps: - The fasteners, particularly the screws (5), are arranged in the reed valve assembly (4) and held in place by means of the retaining device (6). - Install the reed valve assembly (4) on the radial piston compressor, specifically by screwing the screw into the threaded hole provided for it.

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