Radial plunger pump

Abstract

The invention provides a radial plunger pump 400 for delivering a high pressure fluid. The radial plunger pump 400 has a suction port 10, a pressure port 12, and a plurality of pump elements for delivering the high pressure fluid from the suction port 10 to the pressure port 12. Furthermore, the radial plunger pump 400 comprises a high pressure resistant suction line structure connecting the suction port 10 to at least one suction port of each pump element.

Description

Technical Field

[0001] The invention relates to a radial piston pump for conveying high-pressure fluid. Background Art

[0002] As is well known, radial piston pumps are used to pump fluids under pressure side loads of up to 1000 bar or more. Such radial piston pumps typically include a suction port, a pressure port, a plurality of pump elements, a pump shaft defining a pump axis, and an eccentric. Each pump element includes at least one suction port and at least one pressure outlet. The pump shaft is configured to drive the pump element via the eccentric so as to transport the fluid from the suction port to the pressure port. In addition, such radial piston pumps typically include a high-pressure resistant pressure piping structure that connects the pressure port to at least one pressure outlet of each pump element.

[0003] Fluid is regularly delivered from the suction side of a reservoir or case reservoir in pump units using radial piston pumps. The fluid to be pumped is drawn from the reservoir or case reservoir by the radial piston pump at the suction port. The fluid delivered by the radial piston pump is supplied to the higher-level fluid system at the pressure port.

[0004] The fluid in the tank or case accumulator is usually at approximately ambient pressure. In some cases, if the application requires it, the tank or case accumulator can also be pre-loaded with a low pressure of up to 10 bar. However, conventional radial piston pumps that pump fluid from a tank or case accumulator are not suitable for suction-side pressures exceeding 10 bar.

[0005] In new areas of application, for example, mobile hydrogen refueling of vehicles using special tankers, there are increasing applications in which the fluid to be pumped by the pump (suction side) is already at high pressure of up to 1000 bar. Summary of the Invention

[0006] Therefore, an object of the present invention is to provide a radial piston pump suitable for conveying high-pressure fluid.

[0007] The solution to this problem is achieved by a radial piston pump for conveying high-pressure fluids according to claim 1. Further preferred embodiments are described in the dependent claims.

[0008] According to the present invention, a radial piston pump for delivering high-pressure fluid includes a high-pressure resistant suction piping structure connecting a suction port to at least one suction inlet of each pump element.

[0009] For the purposes of this disclosure, a high-pressure fluid is understood to mean a fluid having a pressure of more than 10 bar up to a maximum of 1000 bar, more precisely a fluid having a pressure of between 20 bar and 1000 bar, and even more precisely a fluid having a pressure of between 500 bar and 1000 bar. High-pressure delivery of the fluid is understood here to mean that the fluid is already in a high-pressure state on the suction side (and not just on the pressure side of the radial piston pump).

[0010] For the purposes of this disclosure, a pump element is understood to mean a device comprising at least one radial piston, a suction valve and a pressure valve for pumping a fluid. Furthermore, the pump element may comprise a return element in the form of a return spring for each radial piston.

[0011] In particular, the high-pressure resistant suction line structure is configured to maintain a pressure between the suction port and the suction inlet of each pump element of more than 10 bar and a maximum of 1000 bar, preferably between 20 bar and 1000 bar, more preferably between 500 bar and 1000 bar. To this end, in particular, the high-pressure resistant suction line structure is at least sectionally formed as an independent pipe arrangement (in particular, the pipe arrangement is formed by a metal pipe and a metal connector), or at least sectionally formed as a pipe arrangement integrated into a metal block, or a combination of the two.

[0012] The radial piston pump according to the present invention is suitable for pumping fluids at high pressure.

[0013] Preferably, the plurality of pump elements are arranged in at least two axial pump planes, the axial positions of these pump planes relative to the pump axis being different from one another. In this way, the achievable delivery volume of the radial piston pump can be increased with a compact arrangement.

[0014] Preferably, the high-pressure resistant suction piping structure is at least partially formed by an independent piping arrangement. In particular, an independent piping arrangement should be understood as a piping arrangement that is separate from the housing of the radial piston pump. In this way, the high-pressure resistant suction piping structure can be flexibly configured.

[0015] Preferably, the high-pressure-resistant suction line structure is at least partially, preferably completely, integrated into the housing of the radial piston pump, preferably in the form of an internal line structure. To this end, the housing can be formed from a single housing piece or from several housing pieces. Since the high-pressure-resistant suction line structure is at least partially, preferably completely, integrated into the housing of the radial piston pump, the radial piston pump can be configured to be particularly compact and space-saving.

[0016] Likewise, the high-pressure-resistant suction piping structure preferably includes at least one suction header section and at least one suction riser section, wherein the at least one suction header section at least partially extends circumferentially relative to the pump axis, and the at least one suction riser section extends parallel to the pump axis. This allows modular expansion of the radial piston pump using additional pump elements.

[0017] In an alternative approach, each pump element is housed in a separate housing block. In other words, each pump element has its own housing. These pump elements for radial piston pumps are available as standard components that can be combined in any number of combinations. This increases the flexibility of radial piston pump design and reduces the design effort.

[0018] In a preferred alternative, the plurality of pump elements are arranged in at least one annular sleeve block. In other words, a plurality of pump elements are arranged in each annular sleeve block of the radial piston pump. In this way, the radial piston pump can be designed to be particularly compact and space-saving.

[0019] In an alternative solution, the at least one suction header section is formed by an independent pipeline device. In this way, the high-pressure resistant suction pipeline structure can be flexibly designed.

[0020] In another alternative, the at least one suction collecting section is formed in at least one independent collecting plate. In particular, the radial piston pump comprises at least two annular sleeve blocks, between which at least one independent collecting plate is arranged. For the purposes of the present application, an independent collecting plate is to be clearly distinguished from an independent pipeline arrangement. An independent collecting plate makes it possible to arrange several pipelines in one plate, whereas in an independent pipeline arrangement, a plurality of independent pipeline elements are interconnected to form an independent pipeline arrangement. The use of an independent collecting plate allows for a compact radial design of the high-pressure resistant suction pipeline arrangement.

[0021] In an alternative embodiment, the at least one suction riser section is formed by an independent pipe arrangement. In this way, the high-pressure resistant suction piping structure can be flexibly designed.

[0022] In a preferred alternative, the at least one suction header section, in particular in the form of an at least partially circumferential suction header groove, is integrated into the at least one annular sleeve block. In this way, the high-pressure suction line structure can be designed to be particularly compact and space-saving.

[0023] In a preferred alternative, the at least one suction riser section, in particular in the form of a suction through-hole, is integrated into the at least one annular casing block. This allows for a particularly compact and space-saving design of the high-pressure suction line structure and the entire radial piston pump, in particular when the at least one suction header section is also integrated into the at least one annular casing block.

[0024] Preferably, each annular sleeve block includes three suction riser sections in the form of suction through-holes and three suction header sections in the form of partially circumferential suction manifolds. Each suction through-hole opens onto the suction manifold on one side (particularly at the circumferential center) and onto the axial end face of the annular sleeve block on the other side. This allows for a particularly compact and space-saving design of the high-pressure suction piping structure and the entire radial piston pump.

[0025] Furthermore, preferably, a mirror plane is defined by the pump axis and the suction riser section, wherein the high-pressure-resistant suction piping structure is mirror-symmetrical to the mirror plane. In particular, the high-pressure-resistant pressure piping structure is also mirror-symmetrical to the mirror plane. This facilitates modular addition of additional pump elements to the radial piston pump along the pump axis to increase the achievable delivery rate of the radial piston pump.

[0026] Preferably, the pump element does not include any return element. The high-pressure fluid on the suction side means that the radial piston pump according to the present invention does not require a return element (e.g., a return spring), because the high-pressure fluid on the suction side ensures the return of the radial piston of the pump element. As a result, the number of required components can be reduced, thereby reducing manufacturing costs, resource consumption, and the risk of failure of the radial piston pump.

[0027] Preferably, the pump shaft is at least sectionally arranged in the housing cavity of the radial piston pump, wherein the housing cavity is configured to be pressure-tight relative to the environment and a clean fluid is contained in the housing cavity. The clean fluid is different from the fluid to be transported and is preferably preloaded relative to the ambient pressure. Further preferably, the radial piston pump includes a clean fluid inlet for introducing the clean fluid into the housing cavity and a clean fluid outlet for discharging the clean fluid from the housing cavity. In particular, the clean fluid is pressurized to a pressure higher than the ambient pressure, for example, to 2 bar to 3 bar. In this way, the clean fluid can be replaced during the operation of the radial piston pump. Any leakage of the fluid to be pumped into the housing cavity can be absorbed by the clean fluid and discharged through the clean fluid outlet. In this way, the components in the housing (for example, the pump shaft, eccentric wheel, eccentric bearing and other components) can be protected from any harmful effects of the fluid to be pumped.

[0028] The radial piston pump configured according to the present invention for conveying high-pressure fluids only utilizes the pressure difference between the high-pressure suction side and the pressure side to increase the pressure of the conveyed fluid, resulting in particularly energy-efficient operation. Furthermore, the radial piston pump according to the present invention avoids cavitation during the suction process. Furthermore, the radial piston pump according to the present invention reduces the suction force of the radial piston of the pump element, thereby preventing the radial piston from lifting off the eccentric. This allows the radial piston pump to operate at significantly higher speeds without increasing wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be described in more detail below with reference to the embodiments shown in the drawings. These drawings schematically show:

[0030] Figure 1 is a perspective view of components of a radial piston pump according to a first embodiment of the present invention;

[0031] Figure 2 yes Figure 1 Top view of the radial piston pump;

[0032] Figure 3 is a perspective view of a radial piston pump according to a modification of the first embodiment of the present invention;

[0033] Figure 4 yes Figure 3 Top view of the radial piston pump;

[0034] Figure 5 is an exploded perspective view of a radial piston pump according to a second embodiment of the present invention;

[0035] Figure 6 yes Figure 5 Another perspective view of the radial piston pump;

[0036] Figure 7 is an exploded perspective view of a radial piston pump according to a second embodiment of the present invention;

[0037] Figure 8 is a perspective view of a radial piston pump according to a third embodiment of the present invention;

[0038] Figure 9 yes Figure 8 A perspective view of the annular casing block of a radial piston pump;

[0039] Figure 10 yes Figure 9 Another perspective view of the middle annular casing block;

[0040] Figure 11 is a perspective view of a radial piston pump according to a fourth embodiment of the present invention;

[0041] Figure 12 yes Figure 11 A perspective view of the annular casing block of a radial piston pump;

[0042] Figure 13 yes Figure 12 Another perspective view of the middle annular casing block;

[0043] Figure 14 yes Figure 12 A perspective view of the piping structure inside the middle annular casing block;

[0044] Figure 15 is a partial cross-sectional perspective view showing Figure 11 The piping structure inside the radial piston pump; and

[0045] Figure 16 yes Figure 11 A perspective view of the sealing plate of a radial piston pump. DETAILED DESCRIPTION

[0046] Figure 1 and Figure 2 A radial piston pump 100 for delivering high-pressure fluid according to a first embodiment of the present invention is shown.

[0047] The radial piston pump 100 includes a suction port 10 , a pressure port 12 , a plurality of pump elements 14 , a pump shaft 16 defining a pump axis A, and an eccentric 18 . Figure 1 and Figure 2 The radial piston pump 100 shown includes five pump elements 14. Each pump element 14 includes a suction port 20 and a pressure outlet 22. The pump shaft 16 is configured to drive the pump elements 14 via the eccentric 18 to deliver high-pressure fluid from the suction port 10 to the pressure port 12. The radial piston pump 100 includes a high-pressure resistant pressure piping structure 24 that connects the pressure port 12 to the pressure outlet 22 of each pump element 14.

[0048] The radial piston pump 100 includes a high-pressure resistant suction line structure 26 connecting the suction port 10 to the suction inlet 22 of each pump element 14 .

[0049] like Figure 1 and Figure 2 As shown, the pump elements 14 of the radial piston pump 100 are each arranged in a separate housing block 28 .

[0050] like Figure 1 and Figure 2 As shown, the high-pressure-resistant suction line structure 26 of the radial piston pump 100 is formed by an independent pipe arrangement 30. To this end, T-pieces 32 are mounted on the suction ports 22 of the pump elements 14 and are circumferentially connected to one another via pipe sections 33. The independent pipe arrangement 30 thus forms a suction manifold 34 of the high-pressure-resistant suction line structure 26, extending completely circumferentially relative to the pump axis A. The suction manifold 34 of the high-pressure-resistant suction line structure 26 thus connects all the suction ports 22 of the pump elements 14 to one another and to the suction port 10 of the radial piston pump 100.

[0051] The high-pressure-resistant pressure conduit structure 24 in the first embodiment is configured as an independent pressure collecting device 36 to connect all the pressure outlets 22 of the pump elements 14 to each other and to the pressure ports 12 of the radial piston pump 100 .

[0052] from Figure 1 and Figure 2 It can be seen in FIG. 1 that the pump element 14 is arranged relative to the pump axis A in an axial pump plane.

[0053] In this embodiment, the pump element 14 further comprises a return element in the form of a return spring 38. Since the pressure of the fluid delivered by the radial piston pump 100 at the suction port 10 is greater than 10 bar, preferably between 20 bar and 1000 bar, more preferably between 500 bar and 1000 bar, the return spring 38 can also be omitted.

[0054] Figure 3 and Figure 4 A radial piston pump 100 ′ according to a variant of the first embodiment is shown, which comprises five further pump elements 14 compared to the radial piston pump 100 , which are arranged in a second axial pump plane relative to the pump axis A. The axial position of the second axial pump plane relative to the pump axis A differs from Figure 1 Axial pump plane shown. Figure 3 It can be seen that relative to Figure 3 The second axial pump plane is arranged in the axial direction of the pump axis A. Figure 1 Axial pump plane shown below.

[0055] In this variation of the first embodiment, the high-pressure resistant pressure piping structure 24 is formed by a pressure collecting plate 44 instead of an independent pressure collecting device 36, which connects the pressure outlets 22 of all ten pump elements 14 to each other and to the pressure port 12. Figure 1 and Figure 2 Unlike the radial piston pump 100 , the independent piping arrangement 30 of the radial piston pump 100 ′ includes a suction riser section 52 , so that the high-pressure resistant suction piping structure 26 connects all ten suction inlets 20 of the pump elements 14 to each other and to the suction port 10 of the radial piston pump 100 ′.

[0056] Figure 5 and Figure 6 1 shows a radial piston pump 200 according to a second embodiment of the present invention. For the sake of clarity, only the elements of the radial piston pump 200 that need to be described are shown. For example, Figure 5 and Figure 6 The pump shaft 16 and the eccentric 18 are not shown.

[0057] The radial piston pump 200 according to the second embodiment comprises an annular sleeve block 40, wherein twelve pump elements 14 are arranged in the axial pump plane. Each pump element 14 of the radial piston pump 200 comprises two suction inlets 20 and one pressure outlet 22 (see FIG. Figure 6 In this embodiment, the annular sleeve block 40 further includes twelve mounting holes 42 .

[0058] from Figure 5 and Figure 6As can be seen in the figure, the radial piston pump 200 also includes a pressure collecting plate 44 having 12 pressure inlets 46 and 12 mounting holes 48, which correspond to the pressure outlet 22 of the pump element 14 and the mounting holes 42 of the annular sleeve block 40. The pressure port 12 of the radial piston pump 200 is formed in the pressure collecting plate 44. Within the pressure collecting plate 44, all pressure inlets 46 are connected to the pressure port 12. In the assembled state of the radial piston pump 200, when the pressure collecting plate 44 is attached to the annular sleeve block 40, the pressure outlet 22 of the pump element 14 is connected to the pressure inlet 46 of the pressure collecting plate 44 in a fluid-tight manner. Therefore, the pressure collecting plate 44 forms the high-pressure resistant pressure piping structure 24 of the radial piston pump 200.

[0059] and Figures 1 to 4 Similar to the first embodiment, the high-pressure resistant suction pipe structure 26 of the radial piston pump 200 of the second embodiment is formed by an independent pipe device 30. Figure 5 and Figure 6 Partially shown are two fully circumferential suction manifold sections 34 of the high-pressure resistant suction piping structure 26 of the radial piston pump 200, which are interconnected via a suction riser section 52 of the high-pressure resistant suction piping structure 26 of the radial piston pump 200, so that all suction inlets 20 of the pump elements 14 are connected to the suction ports 10 in a fluid-tight manner.

[0060] from Figure 7 It can be seen that in a variation of the second embodiment, the radial piston pump 200' includes a second annular sleeve block 40, which is arranged in the second axial pump plane. Here, the second annular sleeve block 40 is arranged below the pressure collecting plate 44. The pressure inlet 46 of the pressure collecting plate 44 is configured to extend axially through the pressure collecting plate 44. Therefore, the pressure outlet 22 of the pump element 14 of the annular sleeve block 40 arranged in the two axial pump planes can be axially connected to the pressure port 12 from both sides through the pressure collecting plate 44. In this case, the high-pressure resistant suction pipeline structure 26 includes at least one additional suction riser section so as to connect the suction port 10 to all suction ports 22 of the pump element 14 arranged in the second axial pump plane in a fluid-conducting manner.

[0061] It is also conceivable that the radial piston pump 200' comprises more than two annular casing blocks 40 in total. In this case, the radial piston pump 200' further comprises more than one pressure collecting plate 44, wherein these pressure collecting plates 44 are further connected by independent pipe means, which form at least one pressure riser section of the high-pressure resistant pressure piping structure 24 (e.g., Figure 8 ), so that all pressure outlets 22 of the pump elements 14 are connected to the pressure ports 12 of the radial piston pump 200 .

[0062] Figures 8 to 10A radial piston pump 300 according to a third embodiment of the present invention is shown. For clarity, only elements of the radial piston pump 300 that are required for description are shown.

[0063] The radial piston pump 300 includes three annular casing blocks 40 , two pressure collecting plates 44 and two suction collecting plates 50 .

[0064] The suction manifold 50 forms the suction manifold section 34 of the high-pressure suction piping structure 26 of the radial piston pump 300. The independent piping structure 30 forms a suction riser section 52 of the high-pressure suction piping structure. The suction riser section 52 connects the suction manifolds 50 to each other and to the suction port 10 of the radial piston pump 300. Thus, the high-pressure suction piping structure 26 connects the suction inlets 20 of all pump elements 14 to the suction port 10 of the radial piston pump 300.

[0065] Likewise, the independent pipe structure 30 forms a pressure riser section of the high-pressure-resistant pressure piping structure 24 of the radial piston pump 300, which connects the two pressure collecting plates 44 to each other and to the pressure port 12. Thus, the high-pressure-resistant pressure piping structure 24 connects the pressure outlets 22 of all pump elements 14 to the pressure port 12 of the radial piston pump 300.

[0066] In the annular sleeve block 40 of the radial piston pump 300, the suction port 20 of the pump element 14 (see Figure 9 ) and pressure outlet 22 (see Figure 10 ) are aligned parallel to the pump axis A.

[0067] It is obvious to experts in the field of radial piston pumps that, depending on the needs, the radial piston pump 300 may also include more or less than three annular sleeve blocks 40 and a corresponding number of pressure collecting plates 44 or suction collecting plates 50. This also applies to the first and second embodiments and the fourth embodiment described below.

[0068] Figures 11 to 16 A radial piston pump 400 according to a fourth embodiment is shown.

[0069] In the radial piston pump 400 , the high-pressure-resistant suction line structure 26 and the high-pressure-resistant pressure line structure 24 are both completely integrated into the housing of the radial piston pump 400 .

[0070] The housing of the radial piston pump 400 is composed of five annular sleeve blocks 40, a pressure collecting plate 44 and a suction collecting plate 50. A sealing plate 51 is provided between each two annular sleeve blocks 40. Figure 16 The five annular sleeve blocks 40 are arranged relative to the pump axis A in five axial pump planes.

[0071] Figures 12 to 15The internal piping structure 53 of the annular casing block 40 of the radial piston pump 400 is shown.

[0072] from Figures 12 to 14 As can be seen in FIG, the high-pressure suction pipe structure 26 of the radial piston pump 400 in the annular casing block 40 includes three partially circumferential suction manifold sections 34, which are in the form of partially circumferential suction manifold grooves 54. In addition, the high-pressure suction pipe structure 26 of the radial piston pump 400 in the annular casing block 40 includes a suction riser section 52 in the form of three suction through holes 56. One side of each suction through hole 56 leads to the suction manifold groove 54 (see FIG. Figure 12 ), the other side leads to the axial end face of the annular sleeve block 40 (see Figure 13 More specifically, as viewed from the circumferential direction of the pump axis A, each suction through-hole 56 opens into the suction collecting groove 54 at a central position.

[0073] Similarly, the high-pressure resistant pressure piping structure 24 of the radial piston pump 400 in the annular casing block 40 includes three partially circumferential pressure collecting sections, which are in the form of partially circumferential pressure collecting grooves 58. In addition, the high-pressure resistant pressure piping structure 24 of the radial piston pump 400 in the annular casing block 40 includes three pressure riser sections in the form of pressure through holes 60. One side of each pressure through hole 60 leads to the pressure collecting groove 58 (see FIG. Figure 13 ), the other side leads to the axial end face of the annular sleeve block 40 (see Figure 12 More specifically, as viewed from the circumference of the pump axis A, each pressure through hole 60 opens into the pressure collecting groove 58 at the center.

[0074] like Figure 15 As shown in the schematic diagram of three annular sleeve blocks 40, this results in the high-pressure-resistant suction piping structure 26 and the high-pressure-resistant pressure piping structure 24 being arranged in mirror symmetry with respect to the mirror plane S defined by the pump axis A and the suction riser section 52. Therefore, by alternately rotating the individual annular sleeve blocks 40 by 180 degrees about the horizontal axis passing through the mirror plane S, any number of annular sleeve blocks 40 can be modularly combined to increase the maximum achievable volume flow of the radial piston pump 400. In other words, each sealing plate 51 acts as an additional mirror plane T for two directly adjacent annular sleeve blocks 40.

[0075] It is obvious to those skilled in the art of radial piston pumps that the annular sleeve block 40 (see FIG. Figure 14 The high-pressure-resistant suction piping structure 26 of the radial piston pump 400 is not limited to three suction manifolds 54, three suction through-holes 56, three pressure-collecting grooves 58, and three pressure through-holes 60. Therefore, while maintaining mirror symmetry with respect to the mirror plane S, only two or more suction manifolds 54, suction through-holes 56, pressure-collecting grooves 58, and pressure through-holes 60 may be provided in the casing block 40.

[0076] from Figure 16 It can also be seen that the sealing plate 51 in this embodiment includes three partially circumferential collecting grooves 62, three riser grooves 64 and twelve fastening grooves. In the assembled state of the radial piston pump 400, the collecting grooves 62 correspond to the suction collecting grooves 54 or the pressure collecting grooves 58 of the annular sleeve block 40 near the sealing plate 51, respectively. In addition, in the assembled state of the radial piston pump 400, the riser grooves 64 correspond to the suction through-holes 56 or the pressure through-holes 60 of the annular sleeve block 40 near the sealing plate 51, respectively. The same applies to the fastening grooves 66. Those skilled in the art recognize that the grooves in the sealing plate 51 can also be arranged in different ways so as to correspond to adjacent elements of the radial piston pump 400 (for example, the annular sleeve block 40 or any existing collecting plates).

[0077] from Figure 16 As can be seen in the figure, the sealing plate 51 in this embodiment further has six sealing elements 68, which are arranged in the manifold groove 62 and the riser groove 64, so that the sealing plate 51 can ensure a fluid-tight connection between each of the two annular sleeve blocks 40 adjacent to the sealing plate 51. In addition, there are further circumferential sealing elements 68 on the inner circumference of the sealing plate 51, which seal the housing cavity 70 of the radial piston pump 400.

[0078] The sealing of the various housing elements (eg, the annular sleeve block 40 ) of the radial piston pump 400 with each other and the sealing of the housing cavity 70 may be achieved by other known sealing means besides the sealing plate 51 discussed in detail herein.

[0079] For example, from Figures 11 to 13 As can be seen in FIG, the pump shaft 16 of the radial piston pump 400 is arranged in sections in the housing cavity 70 of the radial piston pump 400. The housing cavity 70 is configured to be pressure-tight relative to the environment and contains a clean fluid that is different from the fluid delivered by the radial piston pump 400 and is preferably preloaded relative to the ambient pressure. Figure 11 Not shown in the figure, the radial piston pump 400 further includes a clean fluid inlet for introducing a clean fluid into the housing cavity 70 and a clean fluid outlet for discharging the clean fluid from the housing cavity 70. For example, the cleaning fluid can be preloaded to 2 to 3 bar compared to the ambient pressure. The radial piston pumps in the second, third, and fourth embodiments can also adopt similar configurations.

[0080] In another alternative to the fourth embodiment, the high-pressure suction piping structure 26 in the annular sleeve block can also include only the suction manifold 54, the suction through-hole 56, the pressure collecting groove 56, and the pressure through-hole 60. In this case, the corresponding pressure collecting plate 44 and the suction manifold 50 are arranged between the annular sleeve block 40. For example, in this case, the suction manifold 54 having a first radius can be formed in a completely circumferential manner on the axial end face of the annular sleeve block 40. In this case, the pressure collecting groove 58 having a second radius can be formed in a completely circumferential manner on the other axial end face of the annular sleeve block 40. The first radius and the second radius are different. For example, the first radius is smaller than the second radius, or vice versa. In this case, the suction through-hole 56 extends from the suction manifold 54 parallel to the pump axis A to the other axial end face of the annular sleeve block 40, on which the suction manifold 50 is disposed. The pressure through-hole 60 extends from the pressure collecting groove 58 parallel to the pump axis A to one end face of the annular sleeve block 40, on which the pressure collecting plate 44 is disposed.

[0081] Reference Signs List 10 Intake port 12 Pressure port 14 Pump elements 16 Pump shaft 18 eccentric wheel 20 suction port 22 Pressure outlet 24 High-pressure resistant piping structure 26 High-pressure suction pipe structure 28 shell blocks 30 Independent piping devices 32 T-piece 33 pipe sections 34 Suction and collecting section 36 Independent pressure collecting device 38 Return spring 40 annular casing block 42 mounting holes 44 pressure plate 46 Pressure inlet 48 mounting holes 50 Suction manifold 51 sealing plate 52 Suction riser section 53 Internal piping structure 54 Suction collecting tank 56 suction holes 58 pressure collecting tank 60 pressure through hole 62 current collecting groove 64 riser groove 66 Fastening groove 68 Sealing element 70 housing cavity 100-400 radial piston pump A Pump axis S Mirror T Additional mirror

Claims

1. A radial piston pump (100-400) for delivering a high-pressure fluid, the radial piston pump (100-400) comprising a suction port (10), a pressure port (12), a plurality of pump elements (14), a pump shaft (16) defining a pump axis (A), and an eccentric wheel (18), wherein: Each pump element (14) comprises at least one suction port (20) and at least one pressure outlet (22), wherein the pump shaft (16) is configured to drive the pump element (14) via the eccentric (18) so as to deliver the high-pressure fluid from the suction port (10) to the pressure port (12), The radial piston pump (100-400) comprises a high-pressure resistant pressure piping structure (24) connecting the pressure port (12) to the at least one pressure outlet (22) of each pump element (14), It is characterized by: The radial piston pump (100-400) comprises a high-pressure resistant suction line structure (26) connecting the suction port (10) to the at least one suction inlet (20) of each pump element (14).

2. The radial piston pump (100-400) according to claim 1, It is characterized by: The plurality of pump elements (14) are arranged in at least two axial pump planes, the axial positions of the pump planes relative to the pump axis (A) being different from one another.

3. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: The high-pressure resistant suction pipeline structure (26) is at least partially formed by an independent pipeline device (30).

4. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: The high-pressure resistant suction pipeline structure (26) is at least partially integrated into the housing of the radial piston pump (100-400).

5. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: The high-pressure resistant suction pipeline structure (26) comprises at least one suction header section (34) and at least one suction riser section (52), wherein the at least one suction header section (34) at least partially extends circumferentially relative to the pump axis (A), and the at least one suction riser section (52) extends parallel to the pump axis (A).

6. The radial piston pump (100) according to one of the preceding claims, It is characterized by: Each pump element (14) is arranged in a separate housing block (28).

7. The radial piston pump (200-400) according to any one of claims 1 to 5, It is characterized by: The plurality of pump elements (14) are disposed in at least one annular sleeve block (40).

8. The radial piston pump (100-400) according to any one of claims 5 to 7, It is characterized by: The at least one suction header section (34) is formed by an independent pipe arrangement (30).

9. The radial piston pump (100-400) according to claims 5 to 7, It is characterized by: The at least one suction header section (34) is formed in at least one independent header plate (50).

10. The radial piston pump (100-400) according to any one of claims 5 to 9, It is characterized by: The at least one suction riser section (52) is formed by a separate pipe arrangement (30).

11. The radial piston pump (100-400) according to claims 5 to 7, It is characterized by: The at least one suction header section (34), in particular in the form of an at least partially circumferential suction header groove (54), is integrated into the at least one annular sleeve block (40).

12. The radial piston pump (100-400) according to claim 7 and 8 or claim 11, It is characterized by: The at least one suction riser section (52), in particular in the form of a suction through-hole (56), is integrated into the at least one annular sleeve block (40).

13. The radial piston pump (100-400) according to claims 11 and 12, It is characterized by: Each annular sleeve block (40) comprises three suction riser sections (52) in the form of suction through holes (56) and three suction header sections (34) in the form of partially circumferential suction header grooves (54), wherein each suction through hole (56) leads to the suction header groove (54) on one side and to the axial end face of the annular sleeve block (40) on the other side.

14. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: A mirror plane (S) is defined by the pump axis (A) and the suction riser section (52), wherein the high-pressure resistant suction pipeline structure (26) is mirror-symmetrical to the mirror plane (S).

15. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: The pump element (14) does not comprise a resetting element.

16. The radial piston pump (100-400) according to any one of the preceding claims, It is characterized by: The pump shaft is at least sectionally arranged in a housing chamber of the radial piston pump, wherein the housing chamber is configured to be pressure-tight relative to the environment and contains a cleaning fluid different from the fluid to be delivered.

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