Vane pump

Abstract

The invention discloses a vane pump which comprises a pump shell, a stator module and a rotor module. The pump shell is provided with a liquid inlet hole and a liquid outlet hole; a movable cavity is formed in the stator module; the rotor module is rotatably installed in the movable cavity so as to form a liquid suction area with the volume gradually increased and a liquid drainage area with the volume gradually decreased in the rotating process of the rotor module, the liquid suction area is communicated with the liquid inlet hole, and the liquid drainage area is communicated with the liquid outlet hole; a liquid storage cavity is formed between the stator modules in the pump shell, and through holes communicating with the liquid storage cavity and the movable cavity are formed in the stator modules in a penetrating mode. According to the invention, part of liquid in the liquid discharge area can be dispersed into the liquid storage chamber through the through holes, so that the flow division of the discharged liquid is realized, the hydraulic pressure of the discharged liquid can be effectively reduced, and the noise generated by the hydraulic pressure can be reduced. In addition, the liquid storage cavity filled with the liquid equivalently forms a sound insulation structure, a certain noise reduction effect can be achieved on continuous operation of the vane pump in the follow-up process, and finally the use quality of the vane pump can be integrally improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vane pumps, and particularly to a vane pump. Background Art

[0002] A vane pump is a positive displacement pump that presses liquid from the suction side to the discharge side by the contact between the vanes in the rotor slots and the stator ring. Its core structure includes a rotor, a stator, vanes, a distribution plate, and a sealing assembly. The suction and discharge of liquid are realized by the telescopic movement of the vanes in the rotor slots to form a periodically changing sealed cavity.

[0003] During the use of the existing vane pump, due to the presence of spaces in the pump body that cannot be completely sealed and the gaps between components, when the suction pressure is relatively high, for example, a large noise is generated on the liquid discharge side, reducing the service quality of the vane pump and also its stability. Summary of the Invention

[0004] The main object of the present invention is to propose a vane pump, aiming to solve the problem of noise generation in traditional vane pumps due to too high hydraulic pressure.

[0005] To achieve the above object, a vane pump proposed by the present invention includes:

[0006] A pump housing provided with a liquid inlet hole and a liquid outlet hole;

[0007] A stator module disposed in the pump housing, and an activity cavity is defined within the stator module; and,

[0008] A rotor module rotatably installed in the activity cavity, so that during its rotation, a liquid suction area with an increasingly larger volume and a liquid discharge area with an increasingly smaller volume are formed between the radial inner side of the activity cavity and the radial outer side of the rotor module. The liquid suction area is communicated with the liquid inlet hole, and the liquid discharge area is communicated with the liquid outlet hole;

[0009] Wherein, a liquid storage chamber is formed between the stator modules in the pump housing, and a through hole communicating the liquid storage chamber and the activity cavity is provided through the stator module.

[0010] Optionally, the through hole communicates the liquid storage chamber and the liquid discharge area.

[0011] Optionally, the through hole is axially provided through the stator module.

[0012] Optionally, at least two through holes are sequentially arranged at intervals along the rotation direction of the rotor module.

[0013] Optionally, in the direction of approaching the liquid storage chamber along the axis, the aperture of the through hole is set to increase or gradually increase.

[0014] Optionally, the through hole includes a first hole section and a second hole section that are sequentially connected in a direction along the axis and close to the liquid storage chamber, and the aperture of the second hole section is larger than that of the first hole section;

[0015] The first hole section is disposed close to the radial outer edge of the stator module; and / or,

[0016] The axial orthographic projection of the second hole section covers the axial orthographic projection of the first hole section and extends radially inward toward the stator module; and / or,

[0017] At least two through holes are sequentially arranged at intervals along the rotation direction of the rotor module, and the axial orthographic projections of the second hole sections extend radially with the rotation axis of the rotor module as the center.

[0018] Optionally, the axial orthographic projection of the liquid storage cavity extends along the circumferential direction of the stator module; and / or,

[0019] The axial orthographic projection of the liquid storage cavity covers the axial orthographic projection of the stator module.

[0020] Optionally, the pump housing includes:

[0021] A cylindrical main body that penetrates axially to form two openings, the liquid inlet hole and the liquid outlet hole are respectively opened on the side wall of the cylindrical main body, and the stator module and the rotor module are both arranged inside the cylindrical main body;

[0022] Two end covers that are respectively covered at the two openings; and,

[0023] A sealing disc member, the sealing disc member is arranged between the end cover and the corresponding shaft end of the stator module and is spaced from the corresponding shaft end of the stator module, and the sealing disc member, the corresponding shaft end of the stator module and the side wall of the cylindrical main body jointly enclose and define the liquid storage chamber.

[0024] Optionally, the pump housing includes:

[0025] A cylindrical main body that penetrates axially to form two openings, the liquid inlet hole and the liquid outlet hole are respectively opened on the side wall of the cylindrical main body, and the stator module and the rotor module are both arranged inside the cylindrical main body; and,

[0026] Two end covers that are respectively covered at the two openings, and the end cover, the corresponding shaft end of the stator module and the side wall of the cylindrical main body jointly enclose and define the liquid storage chamber.

[0027] Optionally, the pump housing further includes a sealing disc member disposed between the end cover and the corresponding axial end of the stator module, and spaced apart from the corresponding axial end of the stator module. The sealing disc member, the corresponding axial end of the stator module, and the side wall of the cylindrical body jointly enclose and define the liquid storage chamber.

[0028] Optionally, the cylindrical body includes a first cylindrical section and a second cylindrical section connected in sequence along its axial direction. The inner diameter of the second cylindrical section is greater than that of the first cylindrical section. The second cylindrical section is provided in a circumferential ring around the stator module to form an annular channel. The annular channel communicates with the liquid inlet hole and the liquid suction area, and also communicates with the liquid outlet hole and the liquid discharge area. The end cover is disposed on the first cylindrical section and defines the liquid storage chamber within the first cylindrical section.

[0029] Optionally, the stator module includes a stator disc and a stator ring fixedly provided at one axial end of the stator disc. The other axial end of the stator disc and the pump housing define the liquid storage chamber. The stator disc is axially penetrated with a shaft hole, and the ring width of the stator ring varies along the circumferential direction of the shaft hole.

[0030] The rotor module includes a rotor disc and blades. The rotor disc includes a disc body and first and second convex shafts protruding from both axial ends of the disc body. The first convex shaft is used to connect with an external driver, the second convex shaft is rotatably installed in the shaft hole, and the blades are radially movably installed on the disc body and slidably abut against the inner ring wall of the stator ring to realize the rotation of the rotor module relative to the stator module.

[0031] Optionally, a slot is recessed on the radial outer side of the disc body, and a pin hole penetrates through the bottom wall of the slot. The rotor module further includes a pin shaft, which is movably inserted into the pin hole. The blades are movably installed in the slot and are driven by the pin shaft to be radially movable.

[0032] A groove is recessed at the axial end of the second convex shaft, and the groove communicates with the liquid storage chamber and the pin hole.

[0033] Optionally, two recessed portions are formed by partial depression at the axial end of the stator disc facing the rotor module. The two recessed portions are respectively provided on the radial two sides of the stator disc and respectively define the liquid suction area and the liquid discharge area.

[0034] The through hole is opened at the recessed portion.

[0035] In addition, to achieve the above object, the present invention further provides a vane pump, including:

[0036] A pump housing, forming the interior of the pump housing, and the pump housing is provided with a liquid inlet hole and a liquid outlet hole; and,

[0037] A stator module is disposed inside the pump housing, and an activity chamber is defined inside the stator module; and,

[0038] A rotor module is rotatably installed in the activity chamber, so that during its rotation, a liquid suction area with a gradually increasing volume and a liquid discharge area with a gradually decreasing volume are formed between the radial inner side of the activity chamber and the radial outer side of the rotor module. The liquid suction area is communicated with the liquid inlet hole, and the liquid discharge area is communicated with the liquid outlet hole;

[0039] Wherein, a liquid storage chamber is respectively formed outside the axial two ends of the stator module inside the pump housing, and through holes communicating the liquid storage chamber and the activity chamber are formed through the stator module, and there are at least two through holes corresponding to the two liquid storage chambers.

[0040] Optionally, each of the through holes is opened corresponding to the liquid discharge area.

[0041] Optionally, the through holes respectively arranged at the axial two ends of the stator module are arranged in one-to-one correspondence along the axis.

[0042] In the technical solution provided by the present invention, when the rotor module rotates relative to the stator module, it can drive the liquid outside the pump housing to enter the liquid suction area through the liquid inlet hole, and drive the liquid inside the pump housing to be discharged from the liquid discharge area through the liquid outlet hole to the outside of the pump housing. During this process, since the through hole communicates the activity chamber and the liquid storage chamber, part of the liquid in the liquid discharge area, for example, can be dispersed into the liquid storage chamber through the through hole, realizing the diversion of the discharged liquid, thereby contributing to the diversion and reducing the noise generated by the discontinuous water flow, the accumulation at the liquid outlet hole, and the formation of a vacuum area in the pump body. In addition, the liquid storage chamber filled with liquid is equivalent to forming a sound insulation structure, which can play a certain role in reducing noise during the subsequent continuous operation of the vane pump, and ultimately helps to improve the overall use quality of the vane pump. Description of the Drawings

[0043] In order to more clearly illustrate the technical solutions in the embodiments of 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 following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to the structures shown in these drawings.

[0044] Figure 1 A three-dimensional schematic diagram of an embodiment of the vane pump provided by the present invention;

[0045] Figure 2 For Figure 1 The main structure decomposition schematic diagram of the vane pump in

[0046] Figure 3 ForFigure 2 Schematic perspective view of the middle stator disk from the first perspective;

[0047] Figure 4 For Figure 2 Schematic perspective view of the middle stator disk from another perspective (first embodiment);

[0048] Figure 5 For Figure 2 Schematic perspective view of the middle stator disk from another perspective (second embodiment);

[0049] Figure 6 For Figure 2 Axial schematic view of the middle stator ring;

[0050] Figure 7 For Figure 2 Schematic perspective view of the middle rotor disk;

[0051] Figure 8 For Figure 1 Axial schematic view of the vane pump;

[0052] Figure 9 For Figure 8 Schematic sectional view at A - A;

[0053] Figure 10 For Figure 9 Enlarged schematic view at C;

[0054] Figure 11 For Figure 8 Schematic sectional view at B - B.

[0055] Explanation of the reference numerals in the drawings:

[0056] 100 Pump housing; 110 Cylindrical main body; 111 Liquid inlet hole; 112 Liquid outlet hole; 113 First cylindrical section; 113a Liquid storage chamber; 114 Second cylindrical section; 114a Annular channel; 120 End cover; 130 Sealing disk member; 140 Sealing ring member; 210 Stator disk; 211 Shaft hole; 211a Third hole section; 211b Fourth hole section; 212 Depression; 213 Through hole; 213a First hole section; 213b Second hole section; 220 Stator ring; 231 Liquid suction area; 232 Liquid discharge area; 310 Rotor disk; 311 Disk body; 311a Slot; 311b Pin hole; 312 First convex shaft; 313 Second convex shaft; 313a Groove; 320 Vane; 400 Driver.

[0057] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed embodiments

[0058] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0059] It should be noted that if there are directional indications (such as up, down, left, right, front, back,...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0060] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0061] Please refer to Figures 1 to 11 , the present invention provides a vane pump. The vane pump may include, but is not limited to, a working part and a driving part. Among them, the working part includes a pump housing 100, a stator module, and a rotor module as described below. The driving part generally has an output shaft with a rotational output. Therefore, for ease of understanding, in the following embodiments, the vane pump as a whole having a unified orientation reference is taken as an example for description. Its specific orientation reference may be the axial, radial, and circumferential directions of the output shaft of the driving part.

[0062] In view of the above, the pump housing 100 is provided with a liquid inlet hole 111 and a liquid outlet hole 112. The stator module is disposed within the pump housing 100. An activity cavity is defined within the stator module. The rotor module is rotatably mounted within the activity cavity. During the rotation of the rotor module, a liquid suction area 231 with an increasingly larger volume and a liquid discharge area 232 with an increasingly smaller volume are formed between the radially inner side of the activity cavity and the radially outer side of the rotor module. The liquid suction area 231 communicates with the liquid inlet hole 111. The liquid discharge area 232 communicates with the liquid outlet hole 112. Among them, a liquid storage chamber 113a is formed between the stator modules within the pump housing 100. The stator module is provided with a through hole 213 that communicates the liquid storage chamber 113a and the activity cavity.

[0063] In the technical solution provided by the present invention, when the rotor module rotates relative to the stator module, it can drive the liquid outside the pump housing 100 to enter the liquid suction area 231 through the liquid inlet hole 111, and drive the liquid inside the pump housing 100 to be discharged from the liquid discharge area 232 through the liquid outlet hole 112 to the outside of the pump housing 100. During this process, since the through hole 213 communicates the activity cavity and the liquid storage chamber 113a, part of the liquid in the liquid discharge area 232, for example, can be dispersed into the liquid storage chamber 113a through the through hole 213, realizing the diversion of the discharged liquid, thereby contributing to the diversion and reducing the noise generated by the non - continuity of the water flow, the accumulation at the liquid outlet hole 112, and the formation of a vacuum area within the pump body. In addition, the liquid storage chamber 113a filled with liquid is equivalent to forming a sound - insulation structure, which can play a certain role in reducing noise during the subsequent continuous operation of the vane pump, and ultimately helps to improve the overall quality of the vane pump.

[0064] Please combine Figures 8 to 11 , in this design, the stator module may specifically include a stator disk 210. At this time, the activity cavity can be defined by the stator disk 210 alone. Or the activity cavity can be defined jointly by the stator disk 210 and the pump housing 100. Of course, according to actual needs, the stator module may also include a stator disk 210 and a stator ring 220. Correspondingly, the activity cavity can be defined independently by the stator disk 210 and the stator ring 220. Or the activity cavity can be defined jointly by the stator disk 210, the stator ring 220 and the pump housing 100.

[0065] The stator disk 210 described above can be provided as one or two. When the stator disk 210 is designed as one, the stator disk 210 is located on one side of the axial end of the rotor module. At this time, the activity cavity defined by the stator disk 210 can be open at one of its axial ends, and after the rotor module is assembled in place, the open end of the activity cavity is closed by the rotor module. When the stator disk 210 is designed as two, the two stator disks 210 are respectively arranged on both sides of the shaft end of the rotor module. At this time, the activity cavity defined by the stator disk 210 generally presents a closed cavity. The rotor module is limited within the closed activity cavity.

[0066] In this design, the rotor module may specifically include a rotor disk 310 and blades 320. The rotor disk 310 includes a disk body 311. The blades 320 are movably installed along the radial direction of the disk body 311. There is no limitation on the specific installation method of the blades 320 relative to the disk body 311: In one solution, the blades 320 may be directly protrudingly installed at the outer radial wall of the disk body 311. Or in another solution, a slot 311a is recessed in the outer radial wall of the disk body 311. The blades 320 are received and installed in the slot 311a.

[0067] There is also no limitation on the solution to achieve the purpose that the blades 320 are radially movable relative to the disk body 311: In one solution, the blades 320 may be made of, for example, an elastic material or an elastic structure in part of themselves, so as to achieve the purpose that the blades 320 are elastically telescopic and movable relative to the disk body 311 along the radial direction. Or in another solution, the blades 320 may be movably connected to the disk body 311 through an additionally provided connecting member. The connecting member may specifically be made of, for example, an elastic material or an elastic structure and has the ability of elastic telescopic deformation. Or the connecting member may be directly made of a rigid material.

[0068] Specifically, a pin hole 311b penetrates through the bottom wall of the slot 311a. The rotor module further includes a pin shaft, which is movably inserted into the pin hole 311b. The blades 320 are movably installed in the slot 311a and are driven by the pin shaft to be radially movable. For example Figure 2 As shown, the slot 311a / pin hole 311b may be symmetrically arranged about the central axis of the disk body 311. In this way, a whole pin shaft can be directly inserted through the two symmetrically arranged pin holes 311b to realize the movable installation of the two blades 320 received and installed in the two symmetrically arranged slots 311a. The pin shaft may be made of a rigid material. When it is stressed, it can drive the two symmetrically arranged blades 320 to perform radial translation synchronously through its own radial translation along the disk body 311. Or the pin shaft may be at least partially made of an elastic material. When it is stressed, it can drive the blades 320 to perform radial translation through its own elastic telescopic deformation.

[0069] In order to drive the disk body 311 and the blades 320 to rotate relative to the stator module. Specifically, one or two stator disks 210 are correspondingly provided with shaft holes 211 penetrating along their axial directions. The rotor disk 310 further includes a first convex shaft 312 and a second convex shaft 313 protruding from both axial ends of the disk body 311. The first convex shaft 312 is used to pass through the stator disk 210 on its side (when two stator disks 210 are provided) and then connect to the output shaft of the driving part of the vane pump. The second convex shaft 313 is rotatably installed in the shaft hole 211 of the stator disk 210 on its side.

[0070] Among them, the driving part can be directly set to only the driver 400. The driver 400 at this time can be a motor with a rotary output, a rotary cylinder, or the like. Alternatively, the driving part can be set to include the driver 400 and a transmission component. Among them, when the driver 400 is a motor or a rotary cylinder with a rotary output, the transmission component can be set to a component capable of adjusting the rotary output parameters according to actual needs. For example, a gear set, a worm and worm gear mechanism, etc. When the driver 400 is a linear cylinder with a linear output, the transmission component can be set to a component capable of converting linear displacement into rotary displacement according to actual needs. For example, a rack and pinion mechanism, a lead screw mechanism, etc.

[0071] However, for the sake of easy understanding and in order to be able to provide sufficient and stable rotary driving force to the rotor disk 310, in the following embodiments, the driving part is set to only the driver 400, and the driver 400 is a motor, for example. The driver 400 at this time is externally disposed outside the pump housing 100. After the first convex shaft 312 can penetrate out of the end cover 120 on the corresponding side, it can be coaxially connected to the output shaft of the driver 400. Alternatively, after the output shaft of the driver 400 can penetrate into the end cover 120 on the corresponding side, it can be coaxially connected to the first convex shaft 312 inside the pump housing 100.

[0072] When the disk body 311 and the blades 320 are driven to rotate relative to the stator module, the outer radial wall of the blade 320 and the inner cavity wall of the movable cavity are in sliding contact. At this time, it is defined that the stator disk 210 in the above has a central axis T1. The rotor module has a rotation axis T2. In order to achieve the purpose that the rotor module rotates relative to the stator disk 210 to form a liquid suction area 231 and a liquid discharge area 232 with volume change:

[0073] Specifically, in one application, T2 and T1 can be set to be collinear. However, at least one of the outer diameter of the outer radial wall of the blade 320 and the inner diameter of the inner cavity wall of the movable cavity is arranged to change along the rotation direction. Specifically, as Figure 6 shown, the outer diameter of the outer radial wall of the blade 320 can be substantially the same. However, the inner cavity wall of the movable cavity is specifically defined by the inner ring wall of the stator ring 220. The ring width of the stator ring 220 is arranged to change along the circumferential direction. Since the outer ring cross-sectional shape of the stator ring 220 is generally a perfect circle. Then this makes the inner ring cross-sectional shape of the stator ring 220 a perfect circle with the center offset from T1. When the outer radial wall of the blade 320 rotates and slides along the inner ring wall of the stator ring 220, the above purpose can be achieved.

[0074] Or in another application, T2 can be set to be offset to one side of T1 and the two are substantially parallel. At this time, the outer diameter of the outer radial wall of the blade 320 and the inner diameter of the inner cavity wall of the movable cavity can be set to be unchanged along the rotation direction. That is, the radial cross-sectional shape is substantially a perfect circle.

[0075] Since the rotor module rotates eccentrically within the active cavity, during its eccentric rotation, a cavity with a gradually increasing volume will inevitably appear. The internal pressure of this space is relatively small, achieving the purpose of sucking in external liquid and forming the liquid suction area 231. Conversely, a cavity with a gradually decreasing volume will also inevitably appear. The internal pressure of this cavity is relatively large, achieving the purpose of discharging internal liquid and forming the liquid discharge area 232. Generally, the above-mentioned liquid suction area 231 and liquid discharge area 232 are arranged on the radial two sides of the active cavity.

[0076] Specifically, please refer to Figures 2 to 5 . At the axial end surface of a single stator disk 210 facing the rotor module, or at the axial end surfaces of two stator disks 210 approaching each other, two recessed portions 212 can be locally recessed. The two recessed portions 212 respectively define the liquid suction area 231 and the liquid discharge area 232. The two recessed portions 212 can be specifically arranged on the radial two sides of the stator disk 210. Each recessed portion 212 extends in an arc segment shape along the outer periphery of the central axis T1 of the stator disk 210.

[0077] Based on the stator module and the rotor module in one or several of the above embodiments, specifically, please refer to Figures 1 to 2 As shown, the pump housing 100 includes a cylindrical main body 110 that is generally cylindrical along the axial direction and two end covers 120. Specifically, the cylindrical main body 110 is hollow and penetrates along the axial direction, thus forming two openings. The cylindrical main body 110 can specifically include two first cylindrical segments 113 and a second cylindrical segment 114 located between the two first cylindrical segments 113.

[0078] The above openings are formed at the first cylindrical segments 113. The first cylindrical segments 113 can respectively be adapted for the two end covers 120 to be fitted and installed. When the specifications of the two end covers 120, such as the outer diameter and shape, are different, the inner diameters and shapes of the two first cylindrical segments 113 also adaptively show differences accordingly.

[0079] The end cover 120 can be directly and sealedly installed at the first cylindrical segment 113. Or further, in specific applications, the pump housing 100 further includes a sealing disk member 130. The sealing disk member 130 is provided to partition and cover between the end cover 120 and the corresponding axial end of the stator module. The sealing disk member 130 can be defined by a single disk-shaped sealing structure monomer alone. Or the sealing disk member 130 can also be defined by the combination of at least two sealing structure monomers.

[0080] The second barrel section 114 can accommodate and install the above-mentioned stator module and rotor module. The inner diameter of the second barrel section 114 is at least not less than the outer diameters of the stator module and the rotor module. Specifically, in one embodiment, the inner diameter of at least a part of the second barrel section 114 is greater than the outer diameter of the stator module at the corresponding position, so that an annular channel 114a can be jointly defined between the inner barrel wall of the second barrel section 114 and the radially outer wall of the stator module at the corresponding position. According to actual needs, the annular channel 114a can communicate with the liquid inlet hole 111 and the liquid suction area 231. And / or, the annular channel 114a can communicate with the liquid outlet hole 112 and the liquid discharge area 232.

[0081] The annular channel 114a can surround the periphery of the stator module in a full circle, forming a complete ring shape. Or the annular channel 114a can surround the periphery of the stator module partially, forming an arc-shaped segment.

[0082] The liquid inlet hole 111 and the liquid outlet hole 112 are respectively opened on the pump housing 100. Specifically, they can be opened on the cylindrical main body 110. At this time, according to actual needs, the liquid inlet hole 111 and the liquid outlet hole 112 can be respectively opened on any side of the cylindrical main body 110. For example, the liquid inlet hole 111 and the liquid outlet hole 112 can be arranged oppositely along a radial direction on both sides of the cylindrical main body 110. And further, the liquid inlet hole 111 can be correspondingly arranged adjacent to the liquid suction area 231. The liquid outlet hole 112 can be correspondingly arranged adjacent to the liquid discharge area 232. Or for example, the liquid inlet hole 111 and the liquid outlet hole 112 can be arranged side by side on the same side of the cylindrical main body 110. At this time, based on the above-mentioned annular channel 114a, the communication between the liquid inlet hole 111 and the liquid suction area 231, and the communication between the liquid outlet hole 112 and the liquid discharge area 232 can be respectively realized.

[0083] Since the annular channel 114a is locally defined in the second barrel section 114, the inner diameter of the local part of the second barrel section 114 is generally greater than the inner diameter of at least one first barrel section 113, thus forming a reduced outer diameter area between the two. At this time, further, the pump housing 100 further includes a sealing ring member 140, and the sealing ring member 140 is arranged between the inner side of the cylindrical main body 110 and the outer side of the stator module, and is located at the reduced inner diameter area between the first barrel section 113 and the second barrel section 114. Thus, a sealed partition between the first barrel section 113 and the second barrel section 114 is realized.

[0084] Based on one or several of the above embodiments, it should be noted first that since the liquid storage chamber 113a is jointly defined between the stator module and the pump housing 100. Therefore, in practical applications, the liquid storage chamber 113a can be jointly enclosed and defined by the outer side of the axial end of the stator module and the pump housing 100. Or the liquid storage chamber 113a can also be jointly enclosed and defined by the outer periphery in the radial direction of the stator module and the pump housing 100. Taking the case where the liquid storage chamber 113a is at least partially formed on the outer side of the axial end of the stator module as an example, the specific formation scheme of the liquid storage chamber 113a will be specifically described below:

[0085] In one solution, the liquid storage chamber 113a can be jointly enclosed and defined by the axial end surface of the end cover 120, the corresponding axial end surface of the stator module (specifically, the stator disk 210), and the inner cylindrical wall of the first cylindrical section 113.

[0086] In another solution, when there is a sealing disk member 130 and there is a certain interval between the axial end surface of the sealing disk member 130 and the axial end surface of the stator module (specifically, the stator disk 210), the liquid storage chamber 113a can be jointly enclosed and defined by the axial end surface of the sealing disk member 130, the corresponding axial end surface of the stator module, and the inner cylindrical wall of the first cylindrical section 113.

[0087] When a sealing ring member 140 is further provided following the above two solutions, the sealing ring member 140 can achieve the lateral sealing of the liquid storage chamber 113a. Ensure that the liquid storage chamber 113a is basically in a sealed state except for the through hole 213.

[0088] Through the arrangement of the sealing disk member 130 and the sealing ring member 140, the liquid storage chamber 113a can be locally defined within the first cylindrical section 113. Moreover, the liquid storage chamber 113a can be effectively sealed and isolated on the side facing the corresponding end cover 120.

[0089] Based on one or several of the above embodiments, the through hole 213 is opened at the stator module, and specifically can be opened at the stator disk 210, and can achieve the purpose of connecting the moving chamber and the liquid storage chamber 113a. Generally, according to actual needs, the through hole 213 can be opened to connect the liquid suction area 231 and the liquid storage chamber 113a. And / or, the through hole 213 can be opened to connect the liquid discharge area 232 and the liquid storage chamber 113a. Among them, since the internal pressure in the liquid discharge area 232 is relatively high, more noise is likely to be generated during the liquid flow process. Therefore, it is preferred that the through hole 213 is opened to connect the liquid discharge area 232 and the liquid storage chamber 113a. The following will also take this as an example and make a specific description in conjunction with the drawings.

[0090] The number of the liquid storage chambers 113a provided is related to the arrangement orientation of the through holes 213. That is, when the through hole 213 axially penetrates one end of the stator disk 210 from the liquid drainage area 232, one liquid storage chamber 113a is correspondingly provided. At this time, the liquid in the liquid drainage area 232 can be dispersed and discharged from one side of the stator disk 210 to achieve unilateral pressure division. Or when the through hole 213 axially penetrates both ends of the same stator disk 210 from the liquid drainage area 232, or penetrates two stator disks 210, two liquid storage chambers 113a are correspondingly provided. At this time, the liquid in the liquid drainage area 232 can be dispersed and discharged from both sides of the stator disk 210 respectively to achieve bilateral pressure division.

[0091] It should be noted that when one liquid storage chamber 113a is respectively formed at both axial ends of the stator module as described above, the through holes 213 corresponding to each liquid storage chamber 113a can be all opened at the liquid drainage area 232, all opened at the liquid suction area 231, or respectively opened at the liquid drainage area 232 and the liquid suction area 231. For example Figure 2 In the shown structure, the through holes 213 corresponding to the two liquid storage chambers 113a are all opened at the liquid drainage area 232.

[0092] When the through holes 213 corresponding to the two liquid storage chambers 113a are all opened at the liquid drainage area 232. The through holes 213 respectively arranged at both axial ends of the stator module can be arranged in any suitable manner according to actual needs. Specifically, for example, the through holes 213 arranged at the two liquid storage chambers 113a can be respectively arranged axially in one-to-one correspondence. That is, the axial positive projection of any through hole 213 communicated with one liquid storage chamber 113a can coincide with the positive projection of a through hole 213 communicated with the other chamber. In this way, the liquid in the liquid drainage area 232 is not only divided and pressure-divided on both sides, but also the pressure-dividing effect formed on the stator module and the rotor module is basically kept balanced and consistent.

[0093] During the use of the vane pump, the liquid storage chamber 113a will gradually be filled with liquid, and then continuously play a certain role in sound insulation and noise reduction. Based on this, the liquid storage chamber can extend along the periphery of the shaft hole 211 to any suitable length to form a sufficiently large liquid storage volume. Specifically, for example, the liquid storage chamber surrounds along the periphery of the shaft hole 211 so that the axial positive projection of the liquid storage chamber covers the axial positive projection of the stator module. Or the axial positive projection of the liquid storage chamber is arranged in a full-circle around the periphery of the shaft hole 211.

[0094] Based on the above setting of the second convex shaft 313. After the second convex shaft 313 is assembled to the shaft hole 211, at least the shaft end of the second convex shaft 313 is exposed in the liquid storage chamber 113a. Further at this time, a groove 313a may be recessed in the shaft end of the second convex shaft 313. The notch of the groove 313a communicates with the liquid storage chamber 113a, so that the liquid in the liquid storage chamber 113a can be further filled into the groove 313a, which helps to form a larger liquid storage volume in the limited pump housing 100 by means of the groove 313a.

[0095] When further, the above pin hole 311b communicates with the slot 311a and the groove 313a, then the communication between the movable cavity, the slot 311a, the pin hole 311b, the groove 313a and the liquid storage chamber 113a can be realized by means of the assembly clearance between the pin shaft and the pin hole 311b and the assembly clearance between the blade 320 and the slot 311a. In this way, especially when the liquid is oil, a small part of the oil filled in the liquid storage chamber 113a can be filled into the assembly clearances between the pin shaft and the pin hole 311b and between the blade 320 and the slot 311a through the groove 313a, so as to realize the lubrication of the relative movement between the pin shaft and the pin hole 311b and the relative movement between the blade 320 and the slot 311a.

[0096] In addition, also based on the assembly of the above second convex shaft 313 and the shaft hole 211, further, in the direction of approaching the liquid storage chamber 113a along the axis, the shaft hole 211 includes a third hole section 211a and a fourth hole section 211b connected in sequence. The third hole section 211a is for the second convex shaft 313 to be rotatably installed. The fourth hole section 211b communicates with the liquid storage chamber 113a; the aperture of the fourth hole section 211b is larger than that of the third hole section 211a. In this way, the fourth hole section 211b is filled with a certain amount of liquid through the communication with the liquid storage chamber 113a. Then part of the liquid, such as oil, can be filled into the assembly clearance between the third hole section 211a and the second convex shaft 313, so as to realize the lubrication of the rotational movement of the second convex shaft 313 relative to the third hole section 211a. It should be noted that the above does not limit the specific forming method and form of the fourth hole section 211b. For example, the fourth hole section 211b may not need to be specially formed, and the chamfer formed during the forming of the shaft hole 211 can be directly used to form the third hole section 211a and the fourth hole section 211b.

[0097] The number of the through holes 213 is not limited. The through holes 213 communicating with the same liquid storage chamber 113a and the drainage area 232 can be designed as one or at least two according to actual needs. When the through holes 213 are designed as at least two, the through holes 213 can be dispersed and arranged in any suitable manner in the space corresponding to the drainage area 232. For example Figures 4 to 6, each through hole 213 can be arranged at intervals in sequence along the rotation direction of the rotor module. At this time, the apertures of the respective through holes 213 (corresponding to the flow rate of the liquid) can be set to be the same, or at least some of them can be set to be different according to actual needs. For example, in the rotation direction of the rotor module, the apertures of the respective through holes 213 can be set to gradually increase.

[0098] In order to achieve the purpose of connecting the liquid discharge area 232 and the liquid storage chamber 113a, when the recess 212 is formed at the stator disk 210 as described above, the through hole 213 can be directly opened at the recess 212. In this way, it helps to shorten the path length of the liquid flowing from the liquid discharge area 232 into the liquid storage chamber 113a, and ultimately helps to quickly achieve the purpose of filling the liquid storage chamber 113a.

[0099] The through hole 213 is opened on the stator disk 210 and is not necessarily limited to extending linearly along the axial direction of the stator disk 210. The specific opening direction, extension shape, etc. of the through hole 213 can be confirmed according to the relative orientation relationship between the liquid discharge area 232 and the liquid storage chamber 113a respectively arranged at both axial ends of the stator disk 210. Specifically, for example, when the orthographic projections of the liquid discharge area 232 and the liquid storage chamber 113a along the axial direction are staggeredly arranged, the through hole 213 can be opened as an inclined hole inclined relative to the axial direction. When the orthographic projections of the liquid discharge area 232 and the liquid storage chamber 113a along the axial direction at least partially overlap, the through hole 213 can be opened at the overlapping part and correspondingly be a straight hole extending along the axial direction.

[0100] The aperture of a single through hole 213 can be set to be the same along its length direction (such as the axial direction). Or in a further solution, in the direction along the axial direction approaching the liquid storage chamber 113a, the aperture of the through hole 213 is set to increase or gradually increase. That is, the through hole 213 can specifically be a stepped hole with at least two levels. At this time, each stepped hole section of the through hole 213 can be an equal-diameter hole with an unchanged aperture. Or at least one stepped hole section of the through hole 213 is a variable-diameter hole with a gradually changing aperture. Of course, the through hole 213 as a whole can specifically be a variable-diameter hole with a gradually changing aperture.

[0101] Taking the above stepped hole as an example, please specifically combine Figures 3 to 5 、and Figures 9 to 10 , the through hole 213 includes a first hole section 213a and a second hole section 213b that are sequentially connected in the direction along the axial direction approaching the liquid storage chamber 113a, and the aperture of the second hole section 213b is larger than the aperture of the first hole section 213a. In this way, when the liquid enters the second hole section 213b through the first hole section 213a, it can be dispersed in the relatively enlarged space of the second hole section 213b, and then can be dispersed into the liquid storage chamber 113a along the trend.

[0102] Next, when defining that the stator disk 210 has a radially inner side close to its own central axis T1 and a radially outer edge far from its own central axis T1, the first hole section 213a can be specifically arranged close to the radially outer edge of the stator module. In this way, sufficient space can be reserved as much as possible on the radially inner side of the stator module for the assembly of the rotor module, avoiding excessive occlusion of the through hole 213 by the rotor module.

[0103] The axial orthographic projection of the second hole section 213b covers the axial orthographic projection of the first hole section 213a, realizing the direct connection between the first hole section 213a and the second hole section 213b, and avoiding too many detours to extend the flow path length of the shunt liquid. The axial orthographic projection of the second hole section 213b extends towards the radially inner side of the stator module. In this way, the liquid entering the second hole section 213b can be smoothly guided towards the radially inner side of the liquid storage chamber 113a, ensuring that the liquid entering the liquid storage chamber 113a spreads more quickly in the circumferential and radial directions within the liquid storage chamber 113a.

[0104] Furthermore, when at least two through holes 213 are arranged at intervals in sequence along the rotation direction of the rotor module as described above, the axial orthographic projections of the respective second hole sections 213b extend radially with the rotation axis of the rotor module as the center. That is, each of the second hole sections 213b extends radially in different directions along the rotation axis of the rotor module (as shown in the structure in the figure, that is, along the central axis of the stator module), and the force is more balanced and regular, which helps the stable operation of the vane pump.

[0105] In addition, the through hole 213 can be as Figure 4 shown, opened inside the stator disk 210. That is, the through hole 213 basically does not penetrate radially to the radially outer periphery of the stator disk 210.

[0106] Alternatively, the through hole 213 can also be as Figure 5 shown, opened on the outer periphery of the stator disk 210. That is, the through hole 213 penetrates radially to the radially outer periphery of the stator disk 210. At this time, the liquid storage chamber 113a can be partially connected to the radially outer periphery of the stator module through the through hole 213. That is, part of the liquid in the liquid storage chamber 113a will flow towards the outer periphery of the stator module through the through hole 213.

[0107] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A vane pump, characterized in that, Comprising: A pump housing provided with a liquid inlet hole and a liquid outlet hole; A stator module disposed within the pump housing, with an activity chamber defined within the stator module; And, A rotor module rotatably installed within the activity chamber, such that during its rotation, a liquid suction area with an increasingly larger volume and a liquid discharge area with an increasingly smaller volume are formed between the radially inner side of the activity chamber and the radially outer side of the rotor module. The liquid suction area communicates with the liquid inlet hole, and the liquid discharge area communicates with the liquid outlet hole; Wherein, a liquid storage chamber is formed within the pump housing between the stator modules, and through holes communicating the liquid storage chamber and the activity chamber are provided through the stator modules.

2. The vane pump according to claim 1, characterized in that The through holes communicate the liquid storage chamber and the liquid discharge area.

3. The vane pump according to claim 1, characterized in that, The through holes are axially provided through the stator modules.

4. The vane pump according to claim 1, wherein, At least two of the through holes are arranged at intervals in sequence along the rotation direction of the rotor module.

5. The vane pump according to claim 1, characterized in that, In the direction axially approaching the liquid storage chamber, the aperture of the through holes is set to increase or gradually increase.

6. The vane pump according to claim 1, characterized in that, The through holes include a first hole section and a second hole section connected in sequence in the direction axially approaching the liquid storage chamber, and the aperture of the second hole section is larger than that of the first hole section; The first hole section is arranged close to the radially outer edge of the stator module; and / or, The axial orthographic projection of the second hole section covers the axial orthographic projection of the first hole section and extends towards the radially inner side of the stator module; and / or, At least two of the through holes are arranged at intervals in sequence along the rotation direction of the rotor module, and the axial orthographic projections of the second hole sections extend radially in a radiation pattern centered on the rotation axis of the rotor module.

7. The vane pump according to claim 1, characterized in that, The axial orthographic projection of the liquid storage chamber extends along the circumferential direction of the stator module; and / or, The axial orthographic projection of the liquid storage chamber covers the axial orthographic projection of the stator module.

8. The vane pump according to claim 1, characterized in that, The pump housing includes: A cylindrical main body axially provided with two openings, the liquid inlet hole and the liquid outlet hole are respectively opened on the side wall of the cylindrical main body, and the stator module and the rotor module are both disposed within the cylindrical main body; and, Two end covers respectively covering the two openings, and the end covers, the corresponding axial ends of the stator module and the side wall of the cylindrical main body jointly enclose and define the liquid storage chamber.

9. The vane pump according to claim 8, characterized in that, The pump housing further includes a sealing disc member disposed between the end cover and the corresponding axial end of the stator module and spaced from the corresponding axial end of the stator module, and the sealing disc member, the corresponding axial end of the stator module and the side wall of the cylindrical main body jointly enclose and define the liquid storage chamber.

10. The vane pump according to claim 8, characterized in that, The cylindrical main body includes a first cylinder section and a second cylinder section connected in sequence along its axis, the inner diameter of the second cylinder section is larger than that of the first cylinder section, and the second cylinder section forms an annular channel around the outer circumference of the stator module. The annular channel communicates the liquid inlet hole and the liquid suction area, as well as communicates the liquid outlet hole and the liquid discharge area. The end cover covers the first cylinder section and defines the liquid storage chamber within the first cylinder section.

11. The vane pump according to claim 10, wherein, The pump housing further includes a sealing ring member disposed between the inner side of the cylindrical main body and the outer side of the stator module and located at the inner diameter reduction between the first cylindrical section and the second cylindrical section.

12. The vane pump according to any one of claims 1 to 11, characterized in that, The stator module includes a stator disk and a stator ring fixedly provided at one axial end of the stator disk. The other axial end of the stator disk and the pump housing define the liquid storage chamber. The stator disk is axially penetrated with a shaft hole, and the ring width of the stator ring is variably arranged along the circumference of the shaft hole. The rotor module includes a rotor disk and blades. The rotor disk includes a disk body and a first convex shaft and a second convex shaft protruding from both axial ends of the disk body. The first convex shaft is used to connect to an external driver, the second convex shaft is rotatably installed in the shaft hole, and the blades are radially movably installed on the disk body and slidably abutted against the inner ring wall of the stator ring.

13. The vane pump according to claim 12, characterized in that, A slot is recessed on the radial outer side of the disk body, and a pin hole penetrates the bottom wall of the slot. The rotor module further includes a pin shaft movably inserted into the pin hole. The blades are movably installed in the slot and are driven by the pin shaft to be radially movable. A groove is recessed at the shaft end of the second convex shaft, and the groove communicates the liquid storage chamber and the pin hole.

14. The vane pump according to claim 11, characterized in that, A part of the axial end of the stator disk facing the rotor module is recessed to form two recessed portions. The two recessed portions are respectively provided on the radial both sides of the stator disk and respectively define the liquid suction area and the liquid discharge area. The through hole is opened at the recessed portion.

15. A vane pump, characterized in that, Comprising: A pump housing forming inside the pump housing, and an inlet hole and an outlet hole are provided inside the pump housing. And, A stator module disposed inside the pump housing, and an activity chamber is defined inside the stator module. And, A rotor module rotatably installed in the activity chamber, so that during its rotation, a liquid suction area with an increasingly larger volume and a liquid discharge area with an increasingly smaller volume are formed between the radial inner side of the activity chamber and the radial outer side of the rotor module. The liquid suction area communicates with the inlet hole, and the liquid discharge area communicates with the outlet hole. Wherein, liquid storage chambers are respectively formed on the outer sides of the axial two ends of the stator module inside the pump housing. The stator module is penetrated with through holes communicating the liquid storage chambers and the activity chamber, and at least two through holes are provided corresponding to the two liquid storage chambers.

16. The vane pump according to claim 15, wherein, Each of the through holes is opened corresponding to the liquid discharge area.

17. The vane pump according to claim 16, characterized in that, The through holes respectively provided at the axial two ends of the stator module are arranged axially in one-to-one correspondence.

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