Hydraulic pump station and hydraulic system

Abstract

The invention relates to the technical field of hydraulic systems, and provides a hydraulic pump station and a hydraulic system. The hydraulic pump station comprises a first radial plunger pump, a second radial plunger pump, a phase adjusting mechanism and a transmission clutch. Plungers of the first radial plunger pump communicate with plungers of the second radial plunger pump in a one-to-one correspondence mode, and the second radial plunger pump is connected with the first radial plunger pump through a transmission mechanism. The phase adjusting mechanism is connected with the second radial plunger pump and used for adjusting the plunger phase of the second radial plunger pump. And the transmission clutch is arranged between the second radial plunger pump and the transmission mechanism. When flow adjustment is needed, the second radial plunger pump is separated from the transmission mechanism through the transmission clutch, and the plunger phase of the second radial plunger pump is adjusted through the phase adjusting mechanism, so that the first radial plunger pump and the second radial plunger pump form different plunger phase differences. Therefore, the large-range real-time accurate adjustment of the flow of the hydraulic pump station is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems, and in particular to a hydraulic pump station and a hydraulic system. Background Art

[0002] The reciprocating piston pumps used in traditional fully mechanized coal mining faces in underground coal mines are usually fixed-displacement pumps, which generally adjust the speed through a frequency converter and then adjust the flow rate. They cannot achieve large-range real-time precise adjustment of the flow rate. Summary of the Invention

[0003] In view of the above technical problems, the present invention provides a hydraulic pump station and a hydraulic system.

[0004] In a first aspect of the present invention, a hydraulic pump station is provided, including: a first radial piston pump; a second radial piston pump, the pistons of the first radial piston pump are in one-to-one correspondence and communication with the pistons of the second radial piston pump, and the second radial piston pump is connected to the first radial piston pump through a transmission mechanism so that the first radial piston pump and the second radial piston pump act synchronously; a phase adjustment mechanism, the phase adjustment mechanism is connected to the second radial piston pump for adjusting the piston phase of the second radial piston pump; a transmission clutch, the transmission clutch is arranged between the second radial piston pump and the transmission mechanism for connecting or disconnecting the second radial piston pump and the transmission mechanism.

[0005] According to the hydraulic pump station provided by the present invention, the first radial piston pump includes a driving crankshaft, and the second radial piston pump includes a driven crankshaft; the driving crankshaft is connected to the driven crankshaft through the transmission mechanism.

[0006] According to the hydraulic pump station provided by the present invention, the phase adjustment mechanism includes: an adjustment motor, the adjustment motor is connected to the driven crankshaft.

[0007] According to the hydraulic pump station provided by the present invention, the phase adjustment mechanism further includes: an adjustment clutch, the adjustment clutch is arranged between the adjustment motor and the driven crankshaft for connecting or disconnecting the adjustment motor and the driven crankshaft.

[0008] According to the hydraulic pump station provided by the present invention, the hydraulic pump station further includes: a first angle encoder, the first angle encoder is installed on the adjustment motor for detecting the phase angle of the output shaft of the adjustment motor; a second angle encoder, the second angle encoder is installed on the first radial piston pump for detecting the phase angle of the driving crankshaft.

[0009] A hydraulic pump station provided according to the present invention, the transmission mechanism includes: a first sprocket, the first sprocket is connected to the active drive crankshaft; a second sprocket, the second sprocket is connected to the driven drive crankshaft, and the transmission clutch is connected between the second sprocket and the driven drive crankshaft; a chain, the chain is connected between the first sprocket and the second sprocket.

[0010] A hydraulic pump station provided according to the present invention, the hydraulic pump station further includes: a cooler; A liquid inlet block, the liquid inlet block is communicated with the liquid inlet of the first radial piston pump, the liquid inlet of the second radial piston pump and the liquid inlet of the cooler; a liquid outlet block, the liquid outlet block is connected to the liquid outlet of the first radial piston pump and the liquid outlet of the second radial piston pump; a first liquid distribution block, the first liquid distribution block is connected to the liquid outlet block; a second liquid distribution block, the second liquid distribution block is connected to the liquid return port of the cooler, and a unloading valve is installed on the second liquid distribution block.

[0011] A hydraulic pump station provided according to the present invention, the hydraulic pump station further includes: a lubricating oil circuit, the lubricating oil circuit is communicated with the lubricating oil channels of the first radial piston pump and the second radial piston pump, and the lubricating oil circuit includes a cooling section, and the cooling section is arranged in the cooler.

[0012] A phase adjustment mechanism provided according to the present invention further includes: a motor liquid supply pump, the motor liquid supply pump is connected to the adjustment motor; a liquid supply pump motor, the liquid supply pump motor is connected to the motor liquid supply pump.

[0013] The hydraulic pump station further includes: a main drive motor, the main drive motor is connected to the first radial piston pump.

[0014] In the second aspect of the present invention, a hydraulic system is provided, including an actuator and the hydraulic pump station as described above. The actuator is connected to the hydraulic pump station.

[0015] In the hydraulic pump station provided by the present invention, it includes a first radial piston pump, a second radial piston pump, a phase adjustment mechanism and a transmission clutch. The pistons of the first radial piston pump and the pistons of the second radial piston pump are in one-to-one correspondence and communicated. The second radial piston pump is connected to the first radial piston pump through a transmission mechanism, so that the first radial piston pump and the second radial piston pump act synchronously. The phase adjustment mechanism is connected to the second radial piston pump and is used to adjust the piston phase of the second radial piston pump. The transmission clutch is arranged between the second radial piston pump and the transmission mechanism and is used to connect or disconnect the second radial piston pump and the transmission mechanism.

[0016] During the working process, when flow regulation is required, the second radial piston pump is separated from the transmission mechanism through the transmission clutch, and the piston phase of the second radial piston pump is adjusted through the phase adjustment mechanism, so that different piston phase differences are formed between the first radial piston pump and the second radial piston pump, and finally the flow rate of the hydraulic pump station is changed. After the adjustment is completed, the second radial piston pump is connected to the transmission mechanism through the transmission clutch, and the first radial piston pump drives the second radial piston pump to rotate synchronously through the transmission mechanism to jointly supply liquid to the actuator. Thus, large-range real-time precise regulation of the flow rate of the hydraulic pump station can be achieved.

[0017] Furthermore, in the hydraulic system provided by the present invention, since it includes the hydraulic pump station as described above, it also has all the advantages as described above. Brief Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the hydraulic pump station provided by the present invention.

[0020] Reference Numerals: 100, first radial piston pump; 200, second radial piston pump; 310, adjustment motor; 320, motor liquid supply pump; 330, liquid supply pump motor; 400, transmission clutch; 510, first sprocket; 520, second sprocket; 530, chain; 600, cooler; 710, liquid inlet block; 720, liquid outlet block; 730, first liquid distribution block; 740, second liquid distribution block; 741, unloading valve; 750, lubricating oil circuit; 800, main drive motor; 910, first angle encoder; 920, second angle encoder. Detailed Embodiments

[0021] The following will further describe in detail the embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0022] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the embodiments of the present invention and for simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0024] In the embodiments of the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0025] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0026] The following will be combined with Figure 1 A hydraulic pump station and a hydraulic system provided by an embodiment of the present invention will be described. It should be understood that the following is only a schematic embodiment of the present invention and does not constitute any special limitation on the present invention.

[0027] An embodiment of the first aspect of the present invention provides a hydraulic pump station, as Figure 1 shown. The hydraulic pump station includes: a first radial piston pump 100; a second radial piston pump 200, the pistons of the first radial piston pump 100 are in one-to-one correspondence and communication with the pistons of the second radial piston pump 200, and the second radial piston pump 200 is connected to the first radial piston pump 100 through a transmission mechanism to make the first radial piston pump 100 and the second radial piston pump 200 act synchronously; a phase adjustment mechanism, the phase adjustment mechanism is connected to the second radial piston pump 200 and is used to adjust the piston phase of the second radial piston pump 200; a transmission clutch 400, the transmission clutch 400 is arranged between the second radial piston pump 200 and the transmission mechanism and is used to connect or disconnect the second radial piston pump 200 and the transmission mechanism. For example, both the first radial piston pump 100 and the second radial piston pump 200 include seven pistons, and the pistons of the first radial piston pump 100 and the second radial piston pump 200 are in one-to-one correspondence and communication.

[0028] During the working process, when flow regulation is required, the second radial piston pump 200 is separated from the transmission mechanism through the transmission clutch 400, and the piston phase of the second radial piston pump 200 is adjusted through the phase adjustment mechanism, so that different piston phase differences are formed between the first radial piston pump 100 and the second radial piston pump 200, and finally the flow rate of the hydraulic pump station is changed. After the adjustment is completed, the second radial piston pump 200 is connected to the transmission mechanism through the transmission clutch 400, and the first radial piston pump 100 drives the second radial piston pump 200 to rotate synchronously through the transmission mechanism to jointly supply liquid to the actuator. Thus, large-range real-time precise regulation of the flow rate of the hydraulic pump station can be achieved.

[0029] In an embodiment of the present invention, the first radial piston pump 100 includes a driving crankshaft, and the second radial piston pump 200 includes a driven crankshaft. The driving crankshaft is connected to the driven crankshaft through a transmission mechanism. Among them, the transmission ratio of the transmission mechanism is 1:1, that is, when the driving crankshaft rotates one circle, it drives the driven crankshaft to rotate one circle through the transmission mechanism.

[0030] For example, in an embodiment of the present invention, as Figure 1 shown, the transmission mechanism includes: a first sprocket 510, the first sprocket 510 is connected to the driving crankshaft; a second sprocket 520, the second sprocket 520 is connected to the driven crankshaft, and the transmission clutch 400 is connected between the second sprocket 520 and the driven crankshaft; a chain 530, the chain 530 is connected between the first sprocket 510 and the second sprocket 520. Sprocket support bearings can also be installed on the first sprocket 510 and the second sprocket.

[0031] In order to improve the strength of the transmission mechanism, the chain 530 is set as a triple-row chain. During the rotation of the driving crankshaft, the first sprocket 510 rotates with the driving crankshaft, and then drives the driven crankshaft to rotate through the chain 530 and the second sprocket 520.

[0032] In an embodiment of the present invention, as Figure 1 shown, the phase adjustment mechanism includes: an adjustment motor 310, and the adjustment motor 310 is connected to the driven crankshaft.

[0033] When the flow rate of the hydraulic pump station needs to be adjusted, it is achieved by adjusting the plunger phase difference between the first radial piston pump 100 and the second radial piston pump 200. Specifically, first, the driven drive crankshaft is separated from the second sprocket 520 through the transmission clutch 400. Then, the driven drive crankshaft is independently rotated by adjusting the motor 310 until the plunger phase of the second radial piston pump 200 is adjusted to the target state. Finally, the driven drive crankshaft is connected to the second sprocket 520 through the transmission clutch 400, so that the active drive crankshaft drives the driven drive crankshaft to rotate synchronously through the first sprocket 510, the chain 530, and the second sprocket 520. At this time, the output flow rate of the hydraulic pump station is adjusted to the target state.

[0034] In an embodiment of the present invention, the hydraulic pump station further includes: a first angle encoder 910, which is installed on the adjusting motor 310 and is used to detect the phase angle of the output shaft of the adjusting motor 310; a second angle encoder 920, which is installed on the first radial piston pump 100 and is used to detect the phase angle of the active drive crankshaft. For example, both the first angle encoder 910 and the second angle encoder 920 are absolute angle encoders.

[0035] For example, the hydraulic pump station may further include a controller, and the controller can communicate with the first angle encoder 910, the second angle encoder 920, the adjusting motor 310, and the transmission clutch 400. The controller can control the working states of the transmission clutch 400 and the adjusting motor 310 based on the monitoring results of the first angle encoder 910 and the second angle encoder 920.

[0036] In an embodiment of the present invention, the phase adjustment mechanism further includes: an adjustment clutch, which is arranged between the adjusting motor 310 and the driven drive crankshaft and is used to connect or separate the adjusting motor 310 and the driven drive crankshaft.

[0037] With this structural arrangement, when phase adjustment is required, the adjusting motor 310 is connected to the driven drive crankshaft through the adjustment clutch, so that the adjusting motor 310 drives the driven drive crankshaft to rotate, thereby adjusting the plunger phase angle of the second radial piston pump 200. After the adjustment is completed, the adjusting motor 310 is separated from the driven drive crankshaft through the adjustment clutch to prevent the adjusting motor 310 from idling with the second radial piston pump 200, which can effectively protect the adjusting motor 310 and extend its service life.

[0038] In addition, in an embodiment of the present invention, as Figure 1As shown, the phase adjustment mechanism further includes: a motor liquid supply pump 320, which is connected to the adjustment motor 310; and a liquid supply pump motor 330, which is connected to the motor liquid supply pump 320. That is, the liquid supply pump motor 330 drives the motor liquid supply pump 320 to operate, and the motor liquid supply pump 320 is used to supply liquid to the adjustment motor 310, so that the adjustment motor 310 drives the driven drive crankshaft to rotate, thereby adjusting the plunger phase of the second radial piston pump 200.

[0039] The hydraulic pump station further includes: a main drive motor 800, which is connected to the first radial piston pump 100. That is, the main drive motor 800 drives the first radial piston pump 100 to operate.

[0040] Couplings are provided between the main drive motor 800 and the first radial piston pump 100, between the liquid supply pump motor 330 and the motor liquid supply pump 320, and between the adjustment motor 310 and the second radial piston pump 200.

[0041] In an embodiment of the present invention, as Figure 1 shown, the hydraulic pump station further includes: a cooler 600; an inlet block 710, which is connected to the inlet of the first radial piston pump 100, the inlet of the second radial piston pump 200, and the inlet of the cooler 600; an outlet block 720, which is connected to the outlet of the first radial piston pump 100 and the outlet of the second radial piston pump 200; a first liquid distribution block 730, which is connected to the outlet block 720; and a second liquid distribution block 740, which is connected to the return port of the cooler 600, and a relief valve 741 is installed on the second liquid distribution block 740.

[0042] Furthermore, in an embodiment of the present invention, the hydraulic pump station further includes: a lubricating oil circuit 750, which is connected to the lubricating oil passages of the first radial piston pump 100 and the second radial piston pump 200, and the lubricating oil circuit 750 includes a cooling section, and the cooling section is arranged in the cooler 600.

[0043] For example, both the first radial piston pump 100 and the second radial piston pump 200 are water pumps. The liquid inlet block 710 is connected to the liquid inlet of the first radial piston pump 100 and the liquid inlet of the second radial piston pump 200 to supply liquid to the first radial piston pump 100 and the second radial piston pump 200. The liquid inlet block 710 can also be connected to the cooler 600 to divert a part of the liquid flow of the liquid inlet block 710 as the cooling medium of the cooler 600. The liquid outlet of the first radial piston pump 100 and the liquid outlet of the second radial piston pump 200 are both connected to the liquid outlet block 720. The liquid outlet block 720 is divergently connected to the first liquid distribution block 730 and the second liquid distribution block 740. The liquid outlet of the first liquid distribution block 730 is a high-pressure outlet, which is used to be connected to the actuator to supply liquid to the actuator. A relief valve 741 is installed on the second liquid distribution block 740. The second liquid distribution block 740 is used to be connected to the liquid outlet of the cooler 600. The liquid flow that has been cooled and heated up by the cooler 600 flows back to the water tank or other water return pipelines through the second liquid distribution block 740.

[0044] Lubricating oil channels are provided in the first radial piston pump 100 and the second radial piston pump 200. The lubricating oil channels are connected to the lubricating oil pipeline 750 of the hydraulic pump station. The lubricating oil in the lubricating oil pipeline 750 can flow through the lubricating oil channels in the first radial piston pump 100 and the second radial piston pump 200 for lubrication and maintenance. The cooling section of the lubricating oil pipeline 750 is arranged in the cooler 600 so that the lubricated lubricating oil can be cooled after passing through the cooler 600.

[0045] An embodiment of the second aspect of the present invention provides a hydraulic system, including an actuator and the above-mentioned hydraulic pump station. The hydraulic pump station is connected to the actuator to supply liquid to the actuator.

[0046] Furthermore, in the hydraulic system provided by the present invention, since it includes the above-mentioned hydraulic pump station, it also has the above-mentioned various advantages.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydraulic pump station, characterized in that, The hydraulic pump station includes: A first radial piston pump (100); A second radial piston pump (200), the pistons of the first radial piston pump (100) being in one-to-one communication with the pistons of the second radial piston pump (200), and the second radial piston pump (200) being connected to the first radial piston pump (100) through a transmission mechanism so that the first radial piston pump (100) and the second radial piston pump (200) operate synchronously; A phase adjustment mechanism, the phase adjustment mechanism being connected to the second radial piston pump (200) for adjusting the piston phase of the second radial piston pump (200); A transmission clutch (400), the transmission clutch (400) being provided between the second radial piston pump (200) and the transmission mechanism for connecting or disconnecting the second radial piston pump (200) from the transmission mechanism.

2. The hydraulic pump station according to claim 1, characterized in that, The first radial piston pump (100) includes a driving crankshaft, and the second radial piston pump (200) includes a driven crankshaft; The driving crankshaft is connected to the driven crankshaft through the transmission mechanism.

3. The hydraulic pump station according to claim 2, characterized in that, The phase adjustment mechanism includes: An adjustment motor (310), the adjustment motor (310) being connected to the driven crankshaft.

4. The hydraulic pump station according to claim 3, characterized in that, The phase adjustment mechanism further includes: An adjustment clutch, the adjustment clutch being provided between the adjustment motor (310) and the driven crankshaft for connecting or disconnecting the adjustment motor (310) from the driven crankshaft.

5. The hydraulic pump station according to claim 3, characterized in that, The hydraulic pump station further includes: A first angle encoder (910), the first angle encoder (910) being installed on the adjustment motor (310) for detecting the phase angle of the output shaft of the adjustment motor (310); A second angle encoder (920), the second angle encoder (920) being installed on the first radial piston pump (100) for detecting the phase angle of the driving crankshaft.

6. The hydraulic pump station according to any one of claims 2 to 5, characterized in that, The transmission mechanism includes: A first sprocket (510), the first sprocket (510) being connected to the driving crankshaft; A second sprocket (520), the second sprocket (520) being connected to the driven crankshaft, and the transmission clutch (400) being connected between the second sprocket (520) and the driven crankshaft; A chain (530), the chain (530) being connected between the first sprocket (510) and the second sprocket (520).

7. The hydraulic pump station according to claim 1, characterized in that, The hydraulic pump station further includes: A cooler (600); An inlet block (710), the inlet block (710) being in communication with the inlet of the first radial piston pump (100), the inlet of the second radial piston pump (200), and the inlet of the cooler (600); An outlet block (720), the outlet block (720) being connected to the outlet of the first radial piston pump (100) and the outlet of the second radial piston pump (200); A first liquid distribution block (730), the first liquid distribution block (730) being connected to the outlet block (720); A second liquid separation block (740), the second liquid separation block (740) is connected to the liquid return port of the cooler (600), and a unloading valve (741) is installed on the second liquid separation block (740).

8. The hydraulic pump station according to claim 7, characterized in that, The hydraulic pump station further includes: A lubricating oil circuit (750), the lubricating oil circuit (750) is communicated with the lubricating oil passages of the first radial piston pump (100) and the second radial piston pump (200), the lubricating oil circuit (750) includes a cooling section, and the cooling section is arranged in the cooler (600).

9. The hydraulic pump station according to claim 3, characterized in that, The phase adjustment mechanism further includes: A motor liquid supply pump (320), the motor liquid supply pump (320) is connected to the adjustment motor (310); A liquid supply pump motor (330), the liquid supply pump motor (330) is connected to the motor liquid supply pump (320); The hydraulic pump station further includes: A main drive motor (800), the main drive motor (800) is connected to the first radial piston pump (100).

10. A hydraulic system, characterized in that, An actuator and the hydraulic pump station according to any one of claims 1 to 9, the actuator is connected to the hydraulic pump station.

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