A lubricating and cooling type gearbox device and its oil pump

Abstract

The present invention discloses a lubricating and cooling type gearbox device, which comprises a box body, a power input component, a power output component, and an oil liquid circulation system. The oil liquid circulation system includes an oil pump; the oil pump (5 / 8) comprises a volute, an impeller, a rotating shaft, a spiral water press chamber, and a diffuser (54). A diffuser is arranged between the outer peripheral surface of the impeller and the spiral water press chamber. The front side inner wall surface of the volute is provided with a front side plate, and the rear side inner wall surface is provided with a rear side plate. The diffuser comprises a first guide vane (57) and a second guide vane (58). There is a diffuser axial width L2 between the front side plate and the rear side plate. The first axial width of the first guide vane is less than 0.5L2, and the second axial width of the second guide vane is also less than 0.5L2; It is characterized in that: the first guide vane has an inner radius R1 and an outer radius R2, the second guide vane has an inner radius R2' and an outer radius R3, R1 < R2 < R3, R1 < R2' < R3, and R2 = (0.8 - 1.2)R2'. The present invention can inhibit the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, can stabilize / increase the output pressure of the oil pump, improve the operation stability and efficiency of the oil pump, and thus improve the operation stability and efficiency of the oil liquid circulation system of the gearbox.

Description

Technical Field

[0001] The present invention relates to the technical field of gear transmission devices / systems, and particularly relates to a lubricating and cooling type gearbox device and an oil pump thereof. Background Art

[0002] The existing lubricating and cooling type gearbox device includes a box body, a power input component, a power output component, and an oil liquid circulation system. The power input component and the power output component are installed in the box body. The oil liquid circulation system includes an oil pump, a heat exchanger, an oil storage tank, a control valve, and pipelines. The oil pump is used to realize the recycling of the oil liquid.

[0003] The oil pump includes a volute, an impeller, a rotating shaft, a spiral water press chamber, and a diffuser. The impeller is installed in the volute. A diffuser is arranged between the outer peripheral surface of the impeller and the spiral water press chamber. The diffuser includes a first guide vane and a second guide vane. A plurality of first guide vanes are circumferentially distributed, and a plurality of second guide vanes are circumferentially distributed; the axial width of the first guide vane and / or the second guide vane is less than the axial width of the diffuser flow passage, and / or, the radial length of the first guide vane is less than the radial length of the second guide vane, and / or, the inner diameter / outer diameter of the first guide vane is less than the inner diameter / outer diameter of the second guide vane. However, there are still problems in the existing oil pump, such as large liquid backflow and turbulent flow in the diffuser section, large pressure loss in the diffuser section, and the efficiency of the oil pump needs to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies existing in the prior art, and provide a lubricating and cooling type gearbox device and an oil pump thereof. Through the improvement and innovative design of the diffuser of the oil pump, by designing the structures and parameters of the first guide vane, the second guide vane and / or the third flow guiding column, the third flow guiding column rotates passively under the impact of the liquid, which can inhibit the generation and expansion of liquid backflow and turbulent flow in the diffuser section, reduce the pressure loss in the diffuser section, can stabilize / increase the output pressure of the oil pump, improve the operation stability and efficiency of the oil pump, and thus improve the operation stability and efficiency of the oil liquid circulation system of the gearbox.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A lubricating and cooling type gearbox device, which comprises a box body (1), a power input component (2), a power output component (3, 4), and an oil circulation system. The oil circulation system includes a first oil pump (5), a heat exchanger (6), an oil storage tank (7), a second oil pump (8), and nozzles (9, 10) connected in sequence; the first oil pump and / or the second oil pump includes a volute (50), an impeller (51), a rotating shaft (52), a spiral water-pressing chamber (53), and a diffuser (54). The impeller is installed inside the volute and on the rotating shaft. A diffuser is arranged between the outer peripheral surface of the impeller and the spiral water-pressing chamber. A front side plate (55) is installed on the front side inner wall surface of the volute, and a rear side plate (56) is installed on the rear side inner wall surface. The diffuser includes a first guide vane (57) and a second guide vane (58). A plurality of first guide vanes are circumferentially distributed, and a plurality of second guide vanes are circumferentially distributed. There is an axial width L2 of the diffuser between the front side plate and the rear side plate. The first axial width of the first guide vane is less than 0.5L2, and the second axial width of the second guide vane is also less than 0.5L2; it is characterized in that: the first guide vane (57) has an inner radius R1, an outer radius R2, the second guide vane (58) has an inner radius R2’, an outer radius R3, R1 < R2 < R3, R1 < R2’ < R3, and R2 = (0.8 - 1.2)R2’.

[0007] Further, the diffuser (54) further includes a third guide post (59). A plurality of third guide posts are circumferentially distributed. One end of the third guide post is rotatably connected to the front side plate (55), and the other end is rotatably connected to the rear side plate (56). The third guide post is cylindrical and also has an axial width L2. The third guide post is driven to rotate passively under the impact of the liquid.

[0008] Further, in the circumferential direction, a plurality of second guide vanes (58), third guide posts (59), and first guide vanes (57) are arranged at intervals in sequence, specifically: second guide vane (58), third guide post (59), first guide vane (57), second guide vane (58), third guide post (59), first guide vane (57)....

[0009] Further, the radius R1 = (0.75 - 0.9)R3, R2 = (0.85 - 0.99)R3, R2 = (0.95 - 1.05)R2’.

[0010] Further, a spiral groove is arranged on the outer peripheral surface of the third guide post (59). The spiral groove extends along the axial direction of the third guide post and generally covers the axial length of the third guide post. The design of the spiral groove facilitates the third guide post to be driven to rotate passively in a preset rotation direction under the impact of the liquid.

[0011] Further, the third flow guide column (59) is generally located at the middle position between adjacent first guide vanes (57) and second guide vanes (58); the diameter of the third flow guide column is 0.05-0.3 times the circumferential distance between adjacent first guide vanes and second guide vanes on the same pitch circle.

[0012] Further, from the radially inner side to the radially outer side, the thickness of the first guide vane (57) gradually increases; from the radially inner side to the radially outer side, the thickness of the second guide vane (58) gradually decreases.

[0013] Further, the third flow guide column (59) also has an axial width L2, and there is an axial gap L1 between the first guide vane (57) and the second guide vane (58), L1 < L2, and L1 = (0.15-0.45)L2.

[0014] Further, the first oil pump (5) and / or the second oil pump (8) is a centrifugal pump.

[0015] A lubricating and cooling type gearbox device and an oil pump thereof according to the present invention have the following beneficial technical effects:

[0016] Through the improvement and innovative design of the diffuser of the oil pump, and through the design of the structures and parameters of the first guide vane, the second guide vane and / or the third flow guide column, the third flow guide column rotates passively under the impact of the liquid, which can inhibit the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, can stabilize / increase the output pressure of the oil pump, improve the operation stability and efficiency of the oil pump, and thus improve the operation stability and efficiency of the oil circulation system of the gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic structural diagram of a lubricating and cooling type gearbox device in the prior art / the present invention;

[0018] Figure 2 Schematic partial cross-sectional structure diagram of the oil pump of the present invention;

[0019] Figure 3 Schematic structural diagram of the diffuser of the oil pump of the present invention

[0020] Figure 4 Schematic enlarged partial structure diagram of the diffuser of the oil pump of the present invention.

[0021] In the figure: housing 1, power input component 2, first power output component 3, second power output component 4, first oil pump 5, heat exchanger 6, oil storage tank 7, second oil pump 8, first nozzle 9, second nozzle 10, first cylindrical part 11, second cylindrical part 12, first bevel gear 22, second bevel gear 32, third bevel gear 42; volute 50, centrifugal impeller 51, rotating shaft 52, spiral water press chamber / water flow passage 53, diffuser 54, front side plate 55, rear side plate 56, first guide vane 57, second guide vane 58, third flow guiding column 59. Detailed implementation manners

[0022] To make the technical solutions and their advantages of the present invention clearer, the technical solutions of the present invention will be further described clearly and completely in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only partial embodiments of the present invention, which are only used to explain the present invention and not to limit the present invention. It should be noted that for the convenience of description, only the parts / structures related to the present invention are shown in the drawings, and other related parts can refer to the general design. Without conflict, the embodiments and the technical features in the embodiments of the present invention can be combined with each other to obtain new embodiments.

[0023] 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 scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains.

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] As Figure 1As shown in the figure, an existing lubricating and cooling type gearbox device of the present invention includes a box body 1, a power input component 2, a first power output component 3, a second power output component 4, and an oil circulation system. The power input component 2, the first power output component 3, and the second power output component 4 are installed in or on the box body 1. The axis of the first power output component 3 is collinear with the axis of the second power output component 4, and the axis of the power input component 2 is perpendicular to the axis of the first power output component 3. The box body 1 includes a first cylindrical part 11 and a second cylindrical part 12. The first cylindrical part 11 is arranged at the bottom of the box body 1 for installing the power input component 2, and the second cylindrical part 12 is arranged at both side parts of the box body 1 for installing the first power output component 3 and the second power output component 4. The power input component 2 includes a first bevel gear 22 installed on the input shaft and a first rolling bearing assembly, and the first rolling bearing assembly is installed in the first cylindrical part 11. The first power output component 3 includes a second bevel gear 32 installed on the first output shaft and a second rolling bearing assembly, and the second rolling bearing assembly is installed in the second cylindrical part 12. The second power output component 4 includes a third bevel gear 42 installed on the second output shaft and a third rolling bearing assembly, and the third rolling bearing assembly is installed in the other second cylindrical part 12.

[0026] The oil circulation system includes a first oil pump 5, a heat exchanger 6, an oil storage tank 7, a second oil pump 8, a first nozzle 9, a second nozzle 10, and a control valve. One end of the first oil pump 5 is connected to the bottom of the box body 1 through a pipeline, and the other end of the first oil pump 5 is connected to the heat exchanger 6, the oil storage tank 7, and the second oil pump 8 in sequence through a pipeline. The other end of the second oil pump 8 is connected to the first nozzle 9 and the second nozzle 10 through a pipeline. The first nozzle 9 is arranged in the box body 1 and is used for spraying oil or oil mist at the meshing part of the bevel gears in the box body 1. The second nozzle 10 is arranged on the second cylindrical part 12 and is used for spraying oil or oil mist at the bearing assembly in the second cylindrical part 12.

[0027] The first oil pump 5 and the second oil pump 8 are used for pumping oil to realize the recycling of the oil. The heat exchanger 6 is used for cooling the oil. The flowing oil is used to improve the lubrication and cooling effects of the gear transmission components and the bearing components. The first nozzle 9 and the second nozzle 10 are used to improve the utilization rate of the oil.

[0028] As Figures 2-4As shown in the figure, an oil pump for a lubricating and cooling type gearbox device of the present invention includes a first oil pump 5 and a second oil pump 8. The first oil pump 5 and / or the second oil pump 8 includes a volute 50, a centrifugal impeller 51, a rotating shaft 52, a spiral water press chamber / water flow passage 53, and a diffuser 54. The impeller 51 is installed in the volute 50 and on the rotating shaft 52. A diffuser 54 is provided between the outer peripheral surface of the impeller 51 and the spiral water press chamber 53. A front side plate 55 is installed on the front side inner wall surface of the volute 50, and a rear side plate 56 is installed on the rear side inner wall surface. The diffuser 54 includes a first guide vane 57 and a second guide vane 58. A plurality of first guide vanes 57 are circumferentially distributed, and a plurality of second guide vanes 58 are circumferentially distributed. There is a diffuser axial width L2 between the front side plate 55 and the rear side plate 56. The first axial width of the first guide vane 57 is less than 0.5L2, and the second axial width of the second guide vane 58 is also less than 0.5L2. It is characterized in that: the first guide vane 57 has an inner radius R1 and an outer radius R2, the second guide vane 58 has an inner radius R2' and an outer radius R3, R1 < R2 < R3, R1 < R2' < R3, and R2 = (0.9 - 1.1)R2', preferably R2 = R2'.

[0029] Furthermore, the diffuser 54 further includes a third guide post 59. A plurality of third guide posts 59 are circumferentially distributed. One end of the third guide post 59 is rotatably connected to the front side plate 55, and the other end is rotatably connected to the rear side plate 56. The third guide post 59 is cylindrical and also has an axial width L2. The third guide post 59 is passively rotated under the impact of the liquid. It can inhibit the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, thereby being able to stabilize / increase the output pressure of the oil pump and improve the operating stability and efficiency of the oil pump.

[0030] Through the improvement and innovative design of the diffuser 54 of the oil pump of the present invention, through the design of the structure and parameters of the first guide vane 57, the second guide vane 58, and / or the third guide post 59, the third guide post 59 is passively rotated under the impact of the liquid, which can inhibit the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, be able to stabilize / increase the output pressure of the oil pump, improve the operating stability and efficiency of the oil pump, and thus improve the operating stability and efficiency of the oil liquid circulation system of the gearbox.

[0031] Furthermore, in the circumferential direction, a plurality of second guide vanes 58, third guide posts 59, and first guide vanes 57 are sequentially arranged at intervals, specifically: second guide vane 58, third guide post 59, first guide vane 57, second guide vane 58, third guide post 59, first guide vane 57...

[0032] Further, the radius R1 = (0.8 - 0.9)R3, preferably 0.85; R2 = (0.9 - 0.97)R3, preferably 0.93; R2 = (0.9 - 1.1)R2', preferably R2 = R2'.

[0033] A spiral groove is provided on the outer peripheral surface of the third guide post 59 (as Figure 2 shown), the spiral groove extends along the axial direction of the third guide post 59, the spiral groove generally covers the axial length of the third guide post 59, and the design of the spiral groove facilitates the third guide post 59 to be passively rotated in a preset rotation direction under the impact of the liquid.

[0034] In the circumferential direction, the third guide post 59 is generally located at the middle position between the adjacent first guide vane 57 and the second guide vane 58; the diameter of the third guide post 59 is 0.05 - 0.3 times the circumferential distance between the adjacent first guide vane 57 and the second guide vane 58 on the same pitch circle.

[0035] Further, as Figures 3-4 shown, from the radially inner side to the radially outer side, the thickness of the first guide vane 57 gradually increases; from the radially inner side to the radially outer side, the thickness of the second guide vane 58 gradually decreases.

[0036] Further, as Figure 2 shown, the third guide post 59 also has an axial width L2, there is an axial gap L1 between the first guide vane 57 and the second guide vane 58, L1 < L2, and L1 = (0.2 - 0.4)L2, preferably 0.3.

[0037] Through the optimized design of the structures and parameters of the first guide vane 57, the second guide vane 58 and / or the third guide post 59, the present invention can better suppress the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, can further stabilize / increase the output pressure of the oil pump, improve the operation stability and efficiency of the oil pump, and thus improve the operation stability and efficiency of the oil circulation system of the gearbox.

[0038] The first oil pump 5 and / or the second oil pump 8 is a centrifugal pump.

[0039] A lubricating and cooling type gearbox device and an oil pump thereof according to the present invention have the following beneficial technical effects:

[0040] Through the improvement and innovative design of the diffuser 54 of the oil pump, and through the design of the structures and parameters of the first guide vane 57, the second guide vane 58 and / or the third flow guiding column 59, the third flow guiding column 59 rotates passively under the impact of the liquid, which can inhibit the generation and expansion of liquid backflow and turbulence in the diffuser section, reduce the pressure loss in the diffuser section, can stabilize / increase the output pressure of the oil pump, improve the operation stability and efficiency of the oil pump, and thus improve the operation stability and efficiency of the oil circulation system of the gearbox.

[0041] The above embodiments are illustrative of the present invention and not restrictive thereof. It will be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lubricating and cooling gearbox device, comprising a housing (1), a power input assembly (2), a power output assembly (3, 4), and an oil circulation system, wherein the oil circulation system comprises a first oil pump (5), a heat exchanger (6), an oil storage tank (7), a second oil pump (8), and nozzles (9, 10) connected in sequence; the first oil pump and / or the second oil pump comprises a volute (50), an impeller (51), a rotating shaft (52), a spiral water pressure chamber (53), and a diffuser (54), wherein the impeller is installed in the volute and the impeller Installed on the rotating shaft, a diffuser is arranged between the outer peripheral surface of the impeller and the spiral water pressure chamber, a front side plate (55) is installed on the front inner wall surface of the volute, and a rear side plate (56) is installed on the rear inner wall surface, the diffuser comprises a first guide vane (57) and a second guide vane (58), a plurality of first guide vanes are distributed along the circumferential direction, a plurality of second guide vanes are distributed along the circumferential direction, an axial width L2 of the diffuser is provided between the front side plate and the rear side plate, a first axial width of the first guide vane is less than 0.5L2, and a second axial width of the second guide vane is also less than 0.5L2; Features: The first guide vane (57) has an inner radius R1 and an outer radius R2, the second guide vane (58) has an inner radius R2' and an outer radius R3, R1<R2<R3, R1<R2'<R3, and R2=(0.8-1.2)R2'; The diffuser further comprises a third guide column (59), a plurality of third guide columns are distributed along the circumferential direction, one end of the third guide column is rotatably connected to the front side plate, and the other end is rotatably connected to the rear side plate, the third guide column is cylindrical, the third guide column also has an axial width L2, and the third guide column passively rotates under the impact of the liquid; In the circumferential direction, a plurality of second guide vanes, third guide posts, and first guide vanes are sequentially arranged at intervals.

2. A lubrication cooling gearbox device according to claim 1, characterized in that: Radius R1 = (0.75-0.9) R3, R2 = (0.85-0.99) R3, R2 = (0.95-1.05) R2'.

3. A lubrication cooling type gearbox device as claimed in claim 2, characterized in that: The outer peripheral surface of the third guide column (59) is provided with a spiral groove, which extends along the axial direction of the third guide column and substantially covers the axial length of the third guide column. The design of the spiral groove facilitates the third guide column to passively rotate in a preset rotation direction under the impact of the liquid.

4. A lubrication cooling type gearbox device as claimed in claim 3, characterized in that: The third guide column (59) is generally located in the middle between the adjacent first guide vanes (57) and the second guide vanes (58); the diameter of the third guide column is 0.05-0.3 times the circumferential distance between the adjacent first guide vanes and the second guide vanes on the same pitch circle.

5. A lubrication cooling type gearbox device as claimed in claim 4, characterized in that: The thickness of the first guide vane (57) gradually increases from the radial inner side to the radial outer side; and the thickness of the second guide vane (58) gradually decreases from the radial inner side to the radial outer side.

6. A lubrication cooling type gearbox device according to claim 4 or 5, characterized in that: The third guide column (59) also has an axial width L2, and an axial gap L1 is provided between the first guide vane (57) and the second guide vane (58), wherein L1<L2, and L1=(0.15-0.45)L2.

7. A lubrication cooling type gearbox device according to claim 4 or 5, characterized in that: The first oil pump (5) and / or the second oil pump (8) is a centrifugal pump.

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