Filling part, gear pump, motor pump, suspension assembly and vehicle
By setting slots on the radial outer and inner sides of the filler, the stress on the filler is balanced, solving the problems of wear and leakage in internal gear pumps, and achieving more efficient fluid pumping and reduced noise and vibration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2025-04-27
- Publication Date
- 2026-05-05
AI Technical Summary
The packing material in existing internal gear pumps is prone to wear under the pressure of the high-pressure liquid in the high-pressure chamber, leading to wear and leakage, which affects the fluid pumping efficiency and noise and vibration.
Slots are provided on the radial outer and inner sides of the filler to connect the high-pressure chamber and the low-pressure chamber, thereby balancing the force on the filler, reducing wear, and a gradient cross section is provided at the slots to alleviate pressure fluctuations.
It effectively reduces wear between fillers, gears, and gear rings, reduces noise and vibration, and improves fluid pumping efficiency and sealing.
Smart Images
Figure CN224200802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of gear pump technology, and in particular to a filler, a gear pump, an electric motor pump, a suspension assembly, and a vehicle. Background Technology
[0002] An internal gear pump typically includes a gear, a gear ring, and a packing material positioned between the gear and the gear ring. The packing material divides the chamber between the gear and the gear ring into a high-pressure chamber and a low-pressure chamber to ensure that the fluid within the internal gear pump flows in a predetermined direction. During operation, the packing material is subjected to pressure from the liquid in the high-pressure chamber, causing friction and wear against the gear or gear ring. Utility Model Content
[0003] The present invention aims to solve the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a filler material disposed between the gear and the gear ring, which facilitates adjustment of the pressure it receives and helps reduce wear in the gear pump.
[0004] This utility model proposes a filler for filling between a gear ring and a gear internally meshing with the gear ring. The filler has: a radially outer surface adapted to abut against the gear ring; a radially inner surface adapted to abut against the gear; a first end face and a second end face, respectively located at the two circumferential ends of the filler; a first groove provided on the radially outer surface, one end of the first groove penetrating the first end face, and the other end of the first groove being spaced apart from the second end face; and / or, a second groove provided on the radially inner surface, one end of the second groove penetrating the first end face, and the other end of the second groove being spaced apart from the second end face.
[0005] According to the filler of this utility model, a first groove is provided on the radially outer side and / or a second groove is provided on the radially inner side. The first end face of the filler is arranged facing the high-pressure chamber and the second end face is arranged facing the low-pressure chamber. The high-pressure chamber and the first groove and / or the second groove are connected by one end of the first groove and / or the second groove penetrating through the first end face. At the same time, the other end of the first groove and / or the second groove is spaced apart from the second end face, so that the first groove and / or the second groove is not connected to the low-pressure chamber. The pressure of the high-pressure fluid in the first groove and / or the second groove acting on the filler can balance or adjust the pressure of the high-pressure fluid from the high-pressure chamber pressing the filler against the gear ring or gear, which helps to reduce its wear in the gear pump.
[0006] In some embodiments of this application, a first groove is disposed adjacent to a first end face, and in the direction from the first end face to the second end face, at least a portion of the cross-section of the first groove gradually decreases; and / or, a second groove is disposed adjacent to a first end face, and in the direction from the first end face to the second end face, at least a portion of the cross-section of the second groove gradually decreases.
[0007] In some embodiments of this application, the filler includes a first crescent plate, an elastic member, and a second crescent plate arranged sequentially in the radial direction. A portion of the first end face is located at the first circumferential end of the first crescent plate, and another portion of the first end face is located at the first circumferential end of the second crescent plate. A portion of the second end face is located at the second circumferential end of the first crescent plate, and another portion of the second end face is located at the second circumferential end of the second crescent plate. The radially outer side is disposed on the first crescent plate, and the radially inner side is disposed on the second crescent plate. The two ends of the elastic member abut against the first crescent plate and the second crescent plate, respectively.
[0008] In some embodiments of this application, the filler divides the chamber between the gear ring and the gear into a high-pressure chamber and a low-pressure chamber. A first gap is provided between the first crescent plate and the second crescent plate. The first gap is adapted to communicate with the high-pressure chamber and is adapted to be spaced apart from the low-pressure chamber.
[0009] In some embodiments of this application, a first sealing element is provided in the first gap, and a first elastic element is disposed in the first gap. The first elastic element causes the first sealing element to abut against the first crescent plate and the second crescent plate respectively, so as to seal and isolate the first gap and the low-pressure cavity.
[0010] In some embodiments of this application, the first gap includes a first mounting space, a first seal and a first elastic member are disposed within the first mounting space, and a mounting groove is provided only on the first crescent plate, referred to as the first mounting groove, and the first mounting groove and the second crescent plate enclose the first mounting space; or, a mounting groove is provided only on the second crescent plate, referred to as the second mounting groove, and the second mounting groove and the first crescent plate enclose the first mounting space; or, the first crescent plate is provided with the first mounting groove, the second crescent plate is provided with the second mounting groove, and the first mounting groove and the second mounting groove enclose the first mounting space.
[0011] In some embodiments of this application, the first gap further includes a first slit, one end of which communicates with the first installation space, and the other end of which is adapted to communicate with the high-pressure chamber; the first crescent plate has a first sealing surface, the second crescent plate has a second sealing surface, the first sealing surface and the second sealing surface are respectively configured as part of the cavity wall of the first installation space, the first sealing element abuts against the first sealing surface, and the first sealing element abuts against the second sealing surface.
[0012] In some embodiments of this application, the radially outer surface is further provided with a third groove, one end of the third groove penetrates through the second end face, the other end of the third groove is spaced apart from the first end face and spaced apart from the first groove; and / or, the radially inner surface is further provided with a fourth groove, one end of the fourth groove penetrates through the second end face, one end of the fourth groove is spaced apart from the first end face and spaced apart from the second groove.
[0013] This application also proposes a gear pump, including a gear ring, a gear internally meshing with the gear ring, and a filler of any of the above embodiments, wherein the filler is filled between the gear ring and the gear, with its radially outer side abutting against the gear ring and its radially inner side abutting against the gear.
[0014] In some embodiments of this application, the gear pump further includes a pump housing, a gear ring, a gear and a filler are all disposed inside the pump housing, the pump housing is provided with a positioning pin, the filler is provided with a positioning groove, and the positioning pin is embedded in the positioning groove to limit the filler in the circumferential direction.
[0015] In some embodiments of this application, the gear pump further includes a distribution plate, and the end face of the gear ring, the end face of the filler and the end face of the gear all abut against the distribution plate.
[0016] In some embodiments of this application, the cavity formed by the distribution plate, gear ring, gear, and filler includes a high-pressure cavity and a low-pressure cavity; the filler includes a first crescent plate and a second crescent plate arranged radially upward, a first gap is formed between the first crescent plate and the second crescent plate, the first gap communicates with the high-pressure cavity and is spaced apart from the low-pressure cavity; a third guide groove is provided on the side of the distribution plate facing the filler, the third guide groove communicates with the high-pressure cavity and the first gap.
[0017] This application also proposes an electric motor pump, including a gear pump and an electric motor of any of the above embodiments, wherein the electric motor is connected to the gear transmission.
[0018] This application also proposes a suspension assembly including the gear pump and / or the motor pump described in any of the above embodiments.
[0019] This application also proposes a vehicle including the gear pump and / or the electric motor pump and / or the suspension assembly of any of the above embodiments. Attached Figure Description
[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0021] Figure 1 This is an exploded view of the filler provided in an embodiment of the present invention.
[0022] Figure 2 This is a schematic diagram of the first crescent-shaped plate from one perspective, provided in an embodiment of this utility model.
[0023] Figure 3 This is a schematic diagram of the first crescent plate provided in another embodiment of the present invention from another perspective.
[0024] Figure 4 This is a schematic diagram of the second crescent plate from one perspective, provided in an embodiment of this utility model.
[0025] Figure 5 This is a schematic diagram of the second crescent plate from another perspective, provided in an embodiment of this utility model.
[0026] Figure 6 This is a partial structural schematic diagram of the gear pump provided in an embodiment of the present invention.
[0027] Figure 7 This is an exploded view of the gear pump provided in an embodiment of the present invention.
[0028] Figure 8 This is a schematic diagram of the distribution plate provided in an embodiment of the present invention.
[0029] Figure 9 yes Figure 6 A magnified view of point C in the middle.
[0030] Figure label:
[0031] 1. Filler; 11. First crescent plate; 111. Radial outer surface; 112. First groove; 1121. First guide groove; 1122. First transition groove; 113. First mounting groove; 1131. First sealing surface; 114. Third groove; 115. Third mounting groove; 116. Positioning groove; 12. Second crescent plate; 121. Radial inner surface; 122. Second groove; 1221. Second guide groove; 1222. Second transition groove; 123. Second mounting groove; 1231. Second sealing surface; 124. First... Four slots, 125, fourth mounting slot, S1, first end face, S2, second end face, 13, first elastic element, 14, first seal, 15, second elastic element, 16, second seal, 2, gear ring, 3, gear, D1, high pressure chamber, D2, low pressure chamber, A, first gap, A1, first mounting space, A2, first slit, B, second gap, B1, second mounting space, B2, second slit, 4, pump casing, 41, pump body, 42, pump cover, 43, positioning pin, 5, distribution plate, 51, third guide slot. Detailed Implementation
[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0033] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0034] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.
[0035] In the description of this utility model, "multiple" means two or more, and "several" means one or more.
[0036] This utility model proposes a filler 1 for filling between a gear ring 2 and a gear 3 internally meshing with the gear ring 2. The filler 1 has: a radially outer surface 111 adapted to abut against the gear ring 2; a radially inner surface 121 adapted to abut against the gear 3; a first end face S1 and a second end face S2, respectively located at the two circumferential ends of the filler 1; the radially outer surface 111 is provided with a first groove 112, one end of the first groove 112 penetrating through the first end face S1, and the other end of the first groove 112 being spaced apart from the second end face S2; and / or, the radially inner surface 121 is provided with a second groove 122, one end of the second groove 122 penetrating through the first end face S1, and the other end of the second groove 122 being spaced apart from the second end face S2.
[0037] Specifically, such as Figures 1 to 7 The gear pump shown is an internal gear pump. The gear pump includes a pump housing 4, a gear 3, a gear ring 2, a filler 1, etc. The gear 3 and the gear ring 2 are rotatably arranged relative to the pump housing 4. The gear ring 2 can be mounted on the pump housing 4 through bearings. The gear 3 can be fixed on the pump shaft and supported on the pump housing 4 through bearings. The gear 3 is located inside the gear ring 2. The gear 3 and the gear ring 2 are eccentrically arranged and mesh with each other. The filler 1 fills the non-meshing area between the gear ring 2 and the gear 3. The radial outer side 111 of the filler 1 abuts against the gear ring 2, and the radial inner side 121 abuts against the gear 3.
[0038] Thus, the filler 1 divides the space between the gear ring 2 and the gear 3 into two chambers. The volume of one chamber gradually increases as the gear 3 and the gear ring 2 mesh, so that the pressure in this chamber is lower than the pressure outside the chamber, so as to draw external fluid into the chamber. This chamber is called the low-pressure chamber D2. The volume of the other chamber gradually decreases as the gear 3 and the gear ring 2 mesh, so that the pressure in this chamber is higher than the pressure outside the chamber, so as to pump the fluid in this chamber to the target area or device. This chamber is called the high-pressure chamber D1.
[0039] like Figure 6 In the embodiment shown, when gear 3 and gear ring 2 rotate counterclockwise, the chamber on the right side of the view is the low-pressure chamber D2, and the chamber on the left side of the view is the high-pressure chamber D1; when gear 3 and gear ring 2 rotate clockwise, the chamber on the left side of the view is the low-pressure chamber D2, and the chamber on the right side of the view is the high-pressure chamber D1.
[0040] This invention provides a first groove 112 on the radially outer side 111 and / or a second groove 122 on the radially inner side 121 of the filler 1. This allows the first end face S1 of the filler 1 to face the high-pressure chamber D1 and the second end face S2 to face the low-pressure chamber D2. One end of the first groove 112 and / or the second groove 122 passes through the first end face S1, connecting the high-pressure chamber D1 and the first groove 112 and / or the second groove 122. At the same time, the other end of the first groove 112 and / or the second groove 122 is spaced apart from the second end face S2, so that the first groove 112 and / or the second groove 122 is not connected to the low-pressure chamber D2. The pressure of the high-pressure fluid in the first groove 112 and / or the second groove 122 acting on the filler 1 can balance or adjust the pressure of the high-pressure fluid from the high-pressure chamber D1 pressing the filler 1 against the gear ring 2 or gear 3, which helps to reduce its wear in the gear pump.
[0041] It is understandable that establishing a pressure difference between the high-pressure chamber D1 and the low-pressure chamber D2 is a prerequisite for the operation of the gear pump. In other words, the high-pressure chamber D1 and the low-pressure chamber D2, separated by the same chamber, must be relatively sealed, or the relative leakage must be below a certain value, for the fluid to be pumped from the low-pressure chamber D2 to the high-pressure chamber D1, thus achieving the basic function of the pump. When the gear pump is working, the pressure of the high-pressure fluid in the high-pressure chamber D1 acts on the packing element 1, causing it to abut against the gear 3 and the gear ring 2, achieving relative sealing and pressure build-up between the high and low-pressure chambers D2. Simultaneously, the higher pressure presses the packing element 1 against the rotating gear 3 and gear ring 2. Long-term operation of the gear pump leads to wear between the packing element 1 and the gears 3 and 2.
[0042] Because the filler 1 is subjected to the pressure of the fluid in the high-pressure chamber D1 and the reaction force of the gear 3 and the gear ring 2, the stress situation is relatively complex. Therefore, in specific applications, the stress analysis of the specific product design scheme can be combined with computer simulation analysis or experimental analysis to determine whether to cut the groove on the radial outer side 111, the radial inner side 121, or both the radial outer side 111 and the radial inner side 121 at the same time, so as to balance the pressure of the high-pressure fluid in the high-pressure chamber D1 that causes the filler 1 to press against the gear 3 and the gear ring 2, thereby reducing wear.
[0043] It is also understandable that one end of the first groove 112 penetrates the first end face S1 facing the high-pressure chamber D1 so that the pressure in the first groove 112 is similar to that in the high-pressure chamber D1. The other end of the first groove 112 is spaced apart from the second end face S2 facing the low-pressure chamber D2 so that the high-pressure chamber D1 and the low-pressure chamber D2 are not connected, ensuring that there is a pressure difference between the high-pressure chamber D1 and the low-pressure chamber D2 that meets the requirements.
[0044] In some embodiments, a first groove 112 is provided on the radially outer surface 111 facing the gear ring 2.
[0045] In some embodiments, a second groove 122 is provided on the radially inner surface 121 facing the gear 3.
[0046] In other embodiments, a first groove 112 is formed on the radially outer side 111 facing the gear ring 2, and a second groove 122 is formed on the radially inner side 121 facing the gear 3.
[0047] The number of the first groove 112 and the second groove 122 can be set according to actual needs and the force analysis mentioned above. The position of the first groove 112 and the second groove 122 in the circumferential direction of the filler 1 can also be set according to actual needs, as long as it can achieve the purpose of balancing the pressure of the high-pressure chamber D1 and reducing the wear between the filler 1 and the gear 3 and between the gear 3.
[0048] In some embodiments of this application, the first groove 112 is disposed adjacent to the first end face S1, and in the direction from the first end face S1 to the second end face S2, at least a portion of the cross-section of the first groove 112 gradually decreases; and / or, the second groove 122 is disposed adjacent to the first end face S1, and in the direction from the first end face S1 to the second end face S2, at least a portion of the cross-section of the second groove 122 gradually decreases.
[0049] like Figures 1 to 5As shown, in this embodiment, the first end face S1 can be positioned facing the high-pressure chamber D1, and the first groove 112 is positioned adjacent to the first end face S1, meaning that the first groove 112 is adjacent to the high-pressure chamber D1. Since the pressure of the fluid gradually increases as it is transported from the low-pressure chamber D2 through the tooth gap, a pressure surge occurs when the fluid reaches the high-pressure chamber D1, causing oil pulsation and resulting in noise and vibration. By positioning the first groove 112 near the high-pressure chamber D1, and ensuring that at least a portion of the cross-section of the first groove 112 gradually increases from the low-pressure chamber D2 to the high-pressure chamber D1, the pressure of the fluid from the low-pressure chamber D2 gradually increases before entering the high-pressure chamber D1. This reduces pressure fluctuations caused by sudden pressure changes and significantly lowers the risk of noise and vibration problems.
[0050] In other words, the gradual change in cross-sectional size of the first groove 112 allows the fluid pressure to gradually transition from low pressure to high pressure, effectively mitigating drastic fluctuations in fluid pressure and reducing the probability of noise and vibration problems.
[0051] Similarly, the second groove 122 is located adjacent to the first end face S1, which means that the second groove 122 is adjacent to the high pressure chamber D1. At least part of the cross section of the second groove 122 gradually increases from the direction of the low pressure chamber D2 to the high pressure chamber D1. This can also make the pressure of the fluid from the low pressure chamber D2 gradually increase before entering the high pressure chamber D1, which can reduce the pressure fluctuation caused by sudden pressure changes and significantly reduce the risk of noise and vibration problems.
[0052] In some embodiments, the cross-sections of at least a portion of the first groove 112 and at least a portion of the second groove 122 are gradually changed, which can alleviate the pressure surge problem from both sides of the filler 1 and enable the gear pump to have better noise and vibration performance.
[0053] It should be noted that the first groove 112 or the second groove 122 is disposed adjacent to the first end face S1. Here, "adjacent" means that the first groove 112 or the second groove 122 is closer to the first end face S1 than the second end face S2. In other words, the first groove 112 or the second groove 122 is located at the end of the filler 1 that is on the same end as the first end face S1.
[0054] In some embodiments, such as Figure 2 As shown, the first groove 112 includes a first guide groove 1121 and a first transition groove 1122 connected to each other. The first guide groove 1121 is adapted to communicate with the high-pressure chamber D1. The cross-section of the first transition groove 1122 gradually decreases in the direction from the first end face S1 to the second end face S2. The arrangement of the first guide groove 1121 facilitates the communication between the first transition groove 1122 and the high-pressure chamber D1, and also facilitates the processing of the first transition groove 1122 with a gradually changing cross-section.
[0055] In some embodiments, such as Figure 5As shown, the second groove 122 includes a second guide groove 1221 and a second transition groove 1222 connected to each other. The second guide groove 1221 is adapted to communicate with the high-pressure chamber D1. The cross-section of the second transition groove 1222 gradually decreases in the direction from the first end face S1 to the second end face S2. The arrangement of the second guide groove 1221 facilitates the communication between the second transition groove 1222 and the high-pressure chamber D1, and also facilitates the machining of the second transition groove 1222 with its gradually changing cross-section.
[0056] In some embodiments of this application, the filler 1 includes a first crescent plate 11, an elastic member, and a second crescent plate 12 arranged sequentially in the radial direction. A portion of the first end face S1 is located at the first circumferential end of the first crescent plate 11, and another portion of the first end face S1 is located at the first circumferential end of the second crescent plate 12. A portion of the second end face S2 is located at the second circumferential end of the first crescent plate 11, and another portion of the second end face S2 is located at the second circumferential end of the second crescent plate 12. A radially outer surface 111 is disposed on the first crescent plate 11, and a radially inner surface 121 is disposed on the second crescent plate 12. The two ends of the elastic member abut against the first crescent plate 11 and the second crescent plate 12, respectively.
[0057] like Figure 1 , Figure 6 and Figure 7 As shown, the filling member 1 includes a first crescent plate 11 disposed on the radially outer side and a second crescent plate 12 disposed on the radially inner side. The two ends of the elastic member disposed between the first crescent plate 11 and the second crescent plate 12 respectively abut against the first crescent plate 11 and the second crescent plate 12.
[0058] During operation, friction inevitably occurs between the packing member 1 and the rotating gear 3 and gear ring 2. After prolonged operation, the radially outer surface 111 and radially inner surface 121 of the packing member 1 will inevitably experience a certain degree of wear, resulting in significant leakage between the high-pressure chamber D1 and the low-pressure chamber D2 of the gear pump, hindering pressure build-up. The elastic element's two ends abut against the first crescent plate 11 and the second crescent plate 12, respectively, indicating that the elastic element has a pre-compression. This pre-compression compensates for the gap between the first crescent plate 11 or the second crescent plate 12 and the gear 3 and gear ring 2 after wear, ensuring that the high-pressure chamber D1 and the low-pressure chamber D2 can build up pressure more effectively, thus maintaining stable gear pump performance.
[0059] In some embodiments of this application, the filler 1 divides the chamber between the gear ring 2 and the gear 3 into a high-pressure chamber D1 and a low-pressure chamber D2. A first gap A is provided between the first crescent plate 11 and the second crescent plate 12. The first gap A is adapted to communicate with the high-pressure chamber D1 and is adapted to be spaced apart from the low-pressure chamber D2.
[0060] like Figure 6As shown, in this embodiment, the filler 1 is placed in the gear pump. The first gap A connects to the high-pressure chamber D1 and is sealed and isolated from the low-pressure chamber D2, so that the high-pressure fluid in the first gap A can apply pressure to the first crescent plate 11 towards the gear ring 2, which is beneficial for the first crescent plate 11 and the gear ring 2 to reliably and stably abut against each other. The high-pressure fluid in the first gap A can also apply pressure to the second crescent plate 12 towards the gear 3, which is beneficial for the first crescent plate 11 and the gear ring 2 to reliably and stably abut against each other. By making the filler 1 reliably abut against the gear 3 and the gear ring 2, leakage between the high-pressure chamber D1 and the low-pressure chamber D2 can be reduced, and the working efficiency of the gear pump can be improved.
[0061] In some embodiments of this application, a first sealing element 14 is provided in the first gap A, and a first elastic element 13 is disposed in the first gap A. The first elastic element 13 causes the first sealing element 14 to abut against the first crescent plate 11 and the second crescent plate 12 respectively, so as to seal and isolate the first gap A and the low-pressure chamber D2.
[0062] Please continue reading. Figure 6 Under the elastic force of the first elastic member 13, the first sealing member 14 abuts against the first crescent plate 11 and the second crescent plate 12 respectively, thereby sealing and isolating the first gap A and the low-pressure chamber D2. The elastic member can cause the first sealing member 14 to undergo sufficient and uniform elastic deformation to form a sealing structure between the first crescent plate 11 and the second crescent plate 12, thus achieving sealing and isolation between the first gap A, which is connected to the high-pressure chamber D1, and the low-pressure chamber D2.
[0063] In some embodiments, the first sealing element 14 is constructed as a cylindrical sealing rod. The cylindrical sealing contact surface is beneficial to improving the design flexibility of the sealing surface that it mates with. In particular, when the cylindrical sealing surface mates with two sealing surfaces at the same time, the effect is more significant. It can reduce the flatness requirements of the respective sealing surfaces that mate with it, and the relative positional relationship between the sealing surface that mates with it and the cylindrical sealing rod is also more flexible.
[0064] In some embodiments of this application, the first gap A includes a first mounting space A1, a first sealing member 14 and a first elastic member 13 are disposed within the first mounting space A1, and a mounting groove, referred to as the first mounting groove 113, is provided on the first crescent plate 11. The first mounting groove 113 and the second crescent plate 12 enclose the first mounting space A1; or...
[0065] Only the second crescent plate 12 has a mounting groove, referred to as the second mounting groove 123, which, together with the first crescent plate 11, forms the first mounting space A1; or,
[0066] The first crescent plate 11 is provided with a first mounting groove 113, and the second crescent plate 12 is provided with a second mounting groove 123. The first mounting groove 113 and the second mounting groove 123 enclose a first mounting space.
[0067] like Figures 1 to 7 A first installation space A1 is provided to accommodate the first seal 14 and the first elastic member 13, making the structure of the filler 1 more compact.
[0068] In some embodiments, a first mounting groove 113 is provided on the side of the first crescent plate 11 facing the second crescent plate 12, and the first mounting groove 113 and the second crescent plate 12 enclose a first mounting space A1.
[0069] In some embodiments, a second mounting groove 123 is provided on the side of the second crescent plate 12 facing the first crescent plate 11, and the second mounting groove 123 and the first crescent plate 11 form a first mounting space A1.
[0070] In some embodiments, such as Figure 6 A first mounting groove 113 is provided on the side of the first crescent plate 11 facing the second crescent plate 12, and a second mounting groove 123 is provided on the side of the second crescent plate 12 facing the first crescent plate 11. The first mounting groove 113 and the second mounting groove 123 enclose a first mounting space A1. This arrangement reduces the depth of the first mounting groove 113 and the second mounting groove 123, which helps to reduce the stress concentration caused by the first mounting groove 113 on the first crescent plate 11, and at the same time, helps to reduce the stress concentration caused by the second mounting groove 123 on the second crescent plate 12, thus helping to ensure the strength of the first crescent plate 11 and the second crescent plate 12.
[0071] In some embodiments of this application, the first gap A further includes a first slit A2, one end of the first slit A2 is connected to the first mounting space A1, and the other end of the first slit A2 is adapted to connect to the high-pressure chamber D1; the first crescent plate 11 has a first sealing surface 1131, the second crescent plate 12 has a second sealing surface 1231, the first sealing surface 1131 and the second sealing surface 1231 are respectively configured as part of the cavity wall of the first mounting space A1, the first sealing member 14 abuts against the first sealing surface 1131, and the first sealing member 14 abuts against the second sealing surface 1231.
[0072] like Figure 6 The first gap A2 can connect the first installation space A1 with the high-pressure chamber D1, allowing high-pressure fluid to enter the first installation space A1 through the first gap A2. The high-pressure fluid in the first installation space A1 can apply pressure to the first seal 14 located in the first installation space A1, making it more fully abut against the first sealing surface 1131 located on the first crescent plate 11 and the second sealing surface 1231 located on the second crescent plate 12, thereby improving the sealing effect between the first seal 14 and the first crescent plate 11 and the second crescent plate 12.
[0073] In some embodiments of this application, the radially outer surface 111 of the filler 1 is further provided with a third groove 114, one end of the third groove 114 penetrates through the second end face S2, the other end of the third groove 114 is spaced apart from the first end face S1 and spaced apart from the first groove 112; and / or, the radially inner surface 121 is further provided with a fourth groove 124, one end of the fourth groove 124 penetrates through the second end face S2, one end of the fourth groove 124 is spaced apart from the first end face S1 and spaced apart from the second groove 122.
[0074] Based on any of the above embodiments, such as Figures 1 to 5 The settings for filler 1 can also be in the following three scenarios:
[0075] The radially outer surface 111 is provided with a first groove 112 and a third groove 114. One end of the first groove 112 penetrates through the first end face S1, and the other end of the first groove 112 is spaced apart from the second end face S2. One end of the third groove 114 penetrates through the second end face S2, and the other end of the third groove 114 is spaced apart from the first end face S1. The first groove 112 and the third groove 114 are spaced apart, that is, the first groove 112 located at one end of the filler 1 and the third groove 114 located at the other end of the filler 1 are not connected.
[0076] The radially outer surface 111 has a first groove 112 and a third groove 114. One end of the first groove 112 penetrates the first end face S1, and the other end of the first groove 112 is spaced apart from the second end face S2. One end of the third groove 114 penetrates the second end face S2, and the other end of the third groove 114 is spaced apart from the first end face S1. The first groove 112 and the third groove 114 are spaced apart, meaning that the first groove 112 at one end of the filler 1 and the third groove 114 at the other end of the filler 1 are not connected. Simultaneously, the radially inner surface 121 has a second groove 122. One end of the second groove 122 penetrates the first end face S1, and the other end of the second groove 122 is spaced apart from the second end face S2. It is understood that the first groove 112 and the second groove 122 are also not connected.
[0077] The radially outer surface 111 is provided with a first groove 112 and a third groove 114. One end of the first groove 112 penetrates through the first end face S1, and the other end of the first groove 112 is spaced apart from the second end face S2. One end of the third groove 114 penetrates through the second end face S2, and the other end of the third groove 114 is spaced apart from the first end face S1. The first groove 112 and the third groove 114 are spaced apart, meaning that the first groove 112 located at one end of the filler 1 and the third groove 114 located at the other end of the filler 1 are not connected. At the same time, the radially inner surface 121 is provided with a second groove 122 and a fourth groove 124. One end of the second groove 122 penetrates through the first end face S1, and the other end of the second groove 122 is spaced apart from the second end face S2. One end of the fourth groove 124 penetrates through the second end face S2, and the other end of the fourth groove 124 is spaced apart from the first end face S1. The second groove 122 and the fourth groove 124 are spaced apart, meaning that the second groove 122 located at one end of the filler 1 is not connected to the fourth groove 124 located at the other end of the filler 1. It can also be understood that the third groove 114 and the fourth groove 124 are not connected either.
[0078] The filler 1 configured in this way can be used in both unidirectional and bidirectional internal gear pumps. When the bidirectional internal gear pump operates in both clockwise and counterclockwise directions, the pressure on the filler 1 can be adjusted to reduce the wear between the filler 1, gear 3 and gear ring 2.
[0079] In a unidirectional internal gear pump, the first end face S1 of the filler 1 can be positioned facing the high-pressure chamber D1, allowing the high-pressure fluid in the first groove 112 or the second groove 122 to balance the pressure of the filler 1 itself. Alternatively, the second end face S2 of the filler 1 can be positioned facing the high-pressure chamber D1, allowing the high-pressure fluid in the third groove 114 or the fourth groove 124 to balance the pressure of the filler 1 itself. During the assembly of the gear pump on the production line, there is no need to specifically check which end face S1 or the second end face S2 faces the high-pressure chamber D1, thus improving assembly efficiency.
[0080] When applied to a bidirectional internal gear pump, the packing part 1 can also be directly assembled, which can also improve assembly efficiency. At the same time, it helps to adjust the rotation direction of gear 3 according to requirements, providing the prerequisite for bidirectional pumping of fluid by the gear pump.
[0081] The shapes of the first groove 112, the second groove 122, the third groove 114, and the fourth groove 124 may be the same or different. The first groove 112 and the second groove 122 may correspond or not correspond in the upward position around the circumference of the filler. Similarly, the third groove 114 and the fourth groove 124 may correspond or not correspond in the upward position around the circumference of the filler.
[0082] In some embodiments, such as Figures 1 to 5The first groove 112, the second groove 122, the third groove 114, and the fourth groove 124 have identical shapes. The circumferential positions of the first groove 112 and the second groove 122 are the same, and the circumferential positions of the third groove 114 and the fourth groove 124 are the same. This simplifies the processing technology of the filler 1.
[0083] In some embodiments, the filler 1 has an axis of symmetry that passes through both the center of the gear 3 and the center of the gear ring 2 when the filler 1 is placed in the gear pump. Viewed axially from the gear 3 or gear ring 2, the shape and construction of the filler 1 are symmetrical about the axis of symmetry. When the filler 1 is not placed in the gear pump, the angle between the axis of symmetry and the first end face S1 and the angle between the axis of symmetry and the second end face S2 are equal.
[0084] In this embodiment, as Figures 1 to 5 As shown, the filler 1 also includes a second sealing element 16 and a second elastic element 15. A second gap B is formed between the first crescent plate 11 and the second crescent plate 12. The second gap B includes a second slit B2 and a second mounting space B1. The second mounting space B1 is enclosed by a third mounting groove 115 and a fourth mounting groove 125. The second elastic element 15 and the second sealing element 16 are located in the second mounting space B1. The second elastic element 15 causes the second sealing element 16 to abut against the sealing surfaces of the first crescent plate 11 and the second crescent plate 12 within the second mounting space B1, respectively. The structure and features of the filler 1 located on both sides of the axis of symmetry are exactly the same, and their functions and beneficial technical effects are also the same, so they will not be described again here.
[0085] This application discloses a gear pump, including a gear ring 2, a gear 3 internally meshing with the gear ring 2, and a filler 1 as described in any of the above embodiments. The filler 1 fills between the gear ring 2 and the gear 3, with its radially outer surface 111 abutting against the gear ring 2 and its radially inner surface 121 abutting against the gear 3.
[0086] The gear pump has the beneficial technical effects of the filler 1 in any of the above embodiments.
[0087] In some embodiments of this application, the gear pump further includes a pump housing 4, a gear ring 2, a gear 3 and a filler 1 are all disposed inside the pump housing 4, the pump housing 4 is provided with a positioning pin 43, and the filler 1 is provided with a positioning groove 116, the positioning pin 43 is embedded in the positioning groove 116 to limit the filler 1 in the circumferential direction.
[0088] In this embodiment, such as Figure 7 As shown, the positioning pin 43 on the pump casing 4 is embedded in the positioning groove 116 on the filler 1 to limit the filler 1 in the circumferential direction, so that the filler 1, the gear ring 2 and the gear 3 are in uniform contact, which improves the stability of the gear pump, can better build up working pressure, improve working efficiency, and reduce the wear between the filler 1, the gear 3 and the gear ring 2.
[0089] In some embodiments, the pump housing 4 includes a pump body 41 and a pump cover 42. The pump body 41 and the pump cover 42 are respectively provided with positioning pins 43. The two positioning pins 43 are spaced apart in the axial direction. The filler 1 is provided with positioning grooves 116 at both ends in the axial direction. The positioning pins 43 at both ends in the axial direction and the positioning grooves 116 at both ends in the axial direction are correspondingly matched and limited.
[0090] It is understandable that the filler 1 is positioned in the circumferential direction and floated in the radial direction in order to achieve wear compensation of the filler 1 in the radial direction.
[0091] In some embodiments of this application, the gear pump further includes a distribution plate 5, and the end face of the gear ring 2, the end face of the filler 1 and the end face of the gear 3 all abut against the distribution plate 5.
[0092] like Figure 7 As shown, by setting the distribution plate 5 at both ends of the gear ring 2, the filler 1 and the gear 3, on the one hand, the direct contact between the pump casing 4 and the gear 3 and gear ring 2 is avoided and wear is prevented; on the other hand, a flow guiding structure and an axial compensation structure can be set on the distribution plate 5 to improve the working performance of the gear pump.
[0093] In some embodiments of this application, the chamber formed by the distribution plate 5, the gear ring 2, the gear 3, and the filler 1 includes a high-pressure chamber D1 and a low-pressure chamber D2; the filler 1 includes a first crescent plate 11 and a second crescent plate 12 arranged radially, a first gap A is formed between the first crescent plate 11 and the second crescent plate 12, the first gap A connects the high-pressure chamber D1 and is spaced apart from the low-pressure chamber D2; the distribution plate 5 is provided with a third guide groove 51 on the side facing the filler 1, the third guide groove 51 connects the high-pressure chamber D1 and the first gap A.
[0094] like Figure 7 and Figure 8 As shown, the high-pressure fluid in the first gap A, which is connected to the high-pressure chamber D1 but not to the low-pressure chamber D2, can reliably abut the first crescent plate 11 against the gear ring 2 and the second crescent plate 12 against the gear ring 2. When the first gap A is small, a third guide groove 51 is provided on the distribution plate 5, which can effectively guide the high-pressure fluid in the high-pressure chamber D1 to the first gap A, which helps to reduce leakage between the high-pressure chamber D1 and the low-pressure chamber D2 and improve the working efficiency of the gear pump.
[0095] In this embodiment, the distribution plate 5 may include two, which abut against the two ends of the gear ring 2, the filler 1, and the gear 3, respectively. It is understood that the axial dimensions or thicknesses of the gear ring 2, the filler 1, and the gear 3 are equal, and axially, the end faces of the gear ring 2, the filler 1, and the gear 3 on the same side are flush. The third guide groove 51 on the distribution plate 5 may also be provided on both sides, with one side facing the high-pressure chamber D1 and the other side facing the low-pressure chamber D2. This ensures that in the bidirectional internal gear pump, the distribution plate 5 can still guide the flow and improve working efficiency when the gear pump rotates in reverse.
[0096] This application also proposes an electric motor pump, including a gear pump and an electric motor according to any of the above embodiments, wherein the electric motor and the gear 3 are connected by a transmission to transmit the power of the electric motor to the gear 3, and the gear 3 drives the gear ring 2 to pump fluid.
[0097] Specifically, the motor may include a motor shaft, with gear 3 fixed on the motor shaft, or gear 3 fixed on the pump shaft, with the pump shaft and motor shaft fixedly connected. As the driving source of the gear pump, the motor pump has advantages such as easy forward and reverse rotation control, speed control, and small size. At the same time, the motor pump also possesses the beneficial technical effects of the aforementioned gear pump.
[0098] This application also proposes a suspension assembly including a gear pump and / or an electric motor pump of any of the above embodiments, which has the beneficial technical effects of the gear pump and / or electric motor pump described above.
[0099] This application also proposes a vehicle including a gear pump and / or an electric motor pump and / or a suspension assembly of any of the above embodiments, wherein the vehicle has the beneficial technical effects of the gear pump and / or electric motor pump and / or suspension assembly described above.
[0100] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0101] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.
Claims
1. A filler for filling between a gear ring and a gear internally meshing with the gear ring, characterized in that, The filler has: The radially outer surface is adapted to abut against the gear ring; The radial inner surface is adapted to abut against the gear; The first end face and the second end face are located at the two circumferential ends of the filler, respectively; The radially outer surface is provided with a first groove, one end of which penetrates the first end face, and the other end of which is spaced apart from the second end face; and / or The radial inner surface is provided with a second groove, one end of which penetrates through the first end face, and the other end of which is spaced apart from the second end face.
2. The filler according to claim 1, characterized in that, The first groove is disposed adjacent to the first end face, and in the direction from the first end face to the second end face, at least part of the cross-section of the first groove gradually decreases; And / or, the second groove is disposed adjacent to the first end face, and in the direction from the first end face to the second end face, at least a portion of the cross-section of the second groove gradually decreases.
3. The filler according to claim 1, characterized in that, The filler includes a first crescent plate, an elastic member, and a second crescent plate arranged radially in sequence. A portion of the first end face is located at the first circumferential end of the first crescent plate, and another portion of the first end face is located at the first circumferential end of the second crescent plate. A portion of the second end face is located at the second circumferential end of the first crescent plate, and another portion of the second end face is located at the second circumferential end of the second crescent plate. The radially outer side is disposed on the first crescent plate, and the radially inner side is disposed on the second crescent plate. The two ends of the elastic member abut against the first crescent plate and the second crescent plate, respectively.
4. The filler according to claim 3, characterized in that, The filler divides the chamber between the gear ring and the gear into a high-pressure chamber and a low-pressure chamber. A first gap is provided between the first crescent plate and the second crescent plate. The first gap is adapted to connect the high-pressure chamber and is adapted to be spaced apart from the low-pressure chamber.
5. The filler according to claim 4, characterized in that, The first gap is provided with a first sealing element and a first elastic element. The first elastic element causes the first sealing element to abut against the first crescent plate and the second crescent plate respectively, so as to seal and isolate the first gap and the low-pressure cavity.
6. The filler according to claim 5, characterized in that, The first gap includes a first installation space, the first seal and the first elastic member are disposed within the first installation space, a first installation groove is provided on the first crescent plate, and the first installation groove and the second crescent plate enclose the first installation space; or, A second mounting groove is provided on the second crescent plate, and the second mounting groove and the first crescent plate together form the first mounting space; or, The first crescent plate is provided with a first mounting groove, and the second crescent plate is provided with a second mounting groove. The first mounting groove and the second mounting groove together form the first mounting space.
7. The filler according to claim 6, characterized in that, The first gap also includes a first slit, one end of which is connected to the first installation space, and the other end of which is adapted to connect to the high-pressure chamber. The first crescent plate has a first sealing surface, and the second crescent plate has a second sealing surface. The first sealing surface and the second sealing surface are respectively configured as part of the cavity wall of the first installation space. The first sealing element abuts against the first sealing surface and the first sealing element abuts against the second sealing surface.
8. The filler according to any one of claims 1-7, characterized in that, The radially outer surface is further provided with a third groove, one end of which penetrates the second end face, and the other end of which is spaced apart from the first end face and also spaced apart from the first groove; and / or The radial inner side is also provided with a fourth groove, one end of which penetrates the second end face, one end of which is spaced apart from the first end face and the other end of which is spaced apart from the second groove.
9. A gear pump, characterized in that, The device includes a gear ring, a gear internally meshing with the gear ring, and a filler as described in any one of claims 1-8, wherein the filler is filled between the gear ring and the gear, the radially outer side abutting against the gear ring, and the radially inner side abutting against the gear.
10. The gear pump according to claim 9, characterized in that, It also includes a pump housing, the gear ring, the gear and the filler are all disposed in the pump housing, the pump housing is provided with a positioning pin, the filler is provided with a positioning groove, and the positioning pin is embedded in the positioning groove to limit the filler in the circumferential direction.
11. The gear pump according to claim 9, characterized in that, It also includes a distribution plate, and the end faces of the gear ring, the filler, and the gear all abut against the distribution plate.
12. The gear pump according to claim 11, characterized in that, The chamber formed by the distribution plate, the gear ring, the gear, and the filler includes a high-pressure chamber and a low-pressure chamber. The filler includes a first crescent plate and a second crescent plate arranged radially upwards, with a first gap formed between the first crescent plate and the second crescent plate, the first gap communicating with the high-pressure chamber and being spaced apart from the low-pressure chamber; The distribution plate has a third guide groove on the side facing the filler, and the third guide groove connects the high-pressure chamber and the first gap.
13. An electric motor pump, characterized in that, It includes the gear pump and motor according to any one of claims 7-12, wherein the motor is connected to the gear drive.
14. A suspension assembly, characterized in that, Includes the gear pump as described in any one of claims 7-12 and / or the motor pump as described in claim 13.
15. A vehicle, characterized in that, Includes the gear pump as described in any one of claims 7-12, and / or the motor pump as described in claim 13, and / or the suspension assembly as described in claim 14.