Double-oil-inlet inner pipeline gear box with screw pump

Abstract

The utility model discloses a double-oil-inlet inner pipeline gear box with a screw pump, which comprises a box body, an input shaft, an output shaft and a pump shaft, the input shaft, the output shaft and the pump shaft are rotatably mounted on the box body through bearings, and the input shaft, the output shaft and the pump shaft are in transmission connection; two oil inlet flanges are installed on the tank body and communicated through an oil distributing pipe, and oil can enter the oil distributing pipe through any oil inlet flange. Oil is supplied to the bearing, the input shaft, the output shaft and the pump shaft in the gear box through the two oil inlet flanges. According to the structure, the structural design of double oil inlet roads is adopted, the length of an oil way in the gearbox can be effectively reduced, two-way oil inlet can still be achieved under the condition that space is limited due to the fact that a screw pump is arranged, the oil way is smooth, and then oil pressure loss is small.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a dual-inlet internal pipeline gearbox with a screw pump. Background Technology

[0002] High-speed gearboxes mostly employ forced lubrication. Due to industry demands, power and speed are constantly increasing, leading to a continuous increase in the specific pressure exerted on the bearings. Besides the bearings and rotor, the lubrication system is also a critical design element, determining the safe and stable operation of a gearbox. Current gearbox designs prioritize compactness and aesthetics, requiring not only material savings but also minimizing manufacturing complexity.

[0003] For dual-inlet screw pumps with side mounting, most adopt an external pipeline or a lower housing with multiple oil holes. The former is easily restricted by the spatial layout of the application scenario, increasing the difficulty of pipeline installation and disassembly, and often interfering with the hoisting of the entire unit; the latter increases the weight of the entire unit and increases material costs.

[0004] CN220870041U discloses a gearbox with an oil pump, comprising a gearbox base, a shaft seat on the gearbox base, an output shaft and an input shaft on the shaft seat, an adjusting oil pump on the surface of the gearbox base, an oil inlet pipe at one end of the adjusting oil pump, an oil distributor plate connected to the oil inlet pipe, the oil distributor plate being installed inside the gearbox base and located on one side of the input shaft, an oil inlet plate between the oil distributor plate and the oil inlet pipe, and an oil pan seat corresponding to the oil distributor plate on the gearbox base. The adjusting oil pump delivers oil through the oil inlet pipe into the oil inlet plate, and the oil enters the oil distributor plate on the oil pan seat. The side of the oil pan seat abuts against the input shaft, simultaneously delivering oil at a uniform speed to the input shaft as it rotates.

[0005] In existing technology, oil can only enter the gearbox through one inlet, which results in a long oil passage inside the gearbox and makes it easy for the oil passage to become blocked. Utility Model Content

[0006] In order to solve the problem of poor oil flow in the gearbox caused by a single oil inlet in the existing technology, the purpose of this utility model is to provide a gearbox with a dual oil inlet internal pipeline and a screw pump.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a dual-inlet internal pipeline gearbox with a screw pump, comprising a housing, an input shaft, an output shaft, and a pump shaft. The input shaft, output shaft, and pump shaft are all rotatably mounted on the housing via bearings, and are connected by a drive connection. Two inlet flanges are installed on the housing, and the two inlet flanges are connected by a distribution pipe, allowing oil to enter the distribution pipe through either inlet flange. The oil is supplied to the bearings, input shaft, output shaft, and pump shaft inside the gearbox through the two inlet flanges.

[0008] Preferably, the output shaft is equipped with an output gear and a driving gear, the input shaft is an integrally formed gear shaft, the pump shaft is equipped with a driven gear, the output shaft is driven by the output gear meshing with the input shaft, and the output shaft is connected to the pump shaft by the driving gear and the driven gear.

[0009] Preferably, the housing is provided with elongated holes and multiple oil injection pipes. Any oil inlet flange supplies oil to the bearings on the housing through the elongated holes, and any oil inlet flange sprays oil to the gear meshing parts inside the housing through the oil injection pipes.

[0010] Preferably, a first oil distribution block is installed on the housing, and a first oil inlet flange is connected to the first oil distribution block. The first oil distribution block distributes the oil in the first oil inlet flange to the oil distribution pipe, the elongated hole, the first oil injection pipe, and the second oil injection pipe. The meshing point of the input shaft and the output gear is located between the first oil injection pipe and the second oil injection pipe.

[0011] Preferably, a second oil distribution block is installed on the housing, and a second oil inlet flange is connected to the second oil distribution block. The second oil inlet flange is connected to the oil distribution pipe and the third oil injection pipe through the second oil distribution block. The third oil injection pipe sprays oil to the meshing point of the driving gear and the driven gear.

[0012] Preferably, the screw pump is mounted on the housing, and the pump shaft is connected to the screw pump drive.

[0013] Preferably, the input shaft is mounted on the housing via a first bearing and a second bearing, the output shaft is mounted on the housing via a third bearing and a fourth bearing, and the pump shaft is mounted on the housing via a fifth bearing; wherein the first bearing, the second bearing, the third bearing, and the fourth bearing are all sliding bearings.

[0014] Preferably, a speed measuring gear is installed on the output shaft, and the speed measuring probe is installed in the gearbox through the first bracket. The speed measuring probe can determine the output speed of the gearbox by detecting the speed measuring gear.

[0015] Preferably, the vibration probe is mounted on the housing via a second bracket, and the vibration probe is used to detect the runout of the input shaft.

[0016] Preferably, the junction box is installed on the side of the box via a third bracket, and a connector is fixed at the bottom of the box. One end of the connector is connected to the inside of the box, and the other end of the connector is connected to an elbow via an oil sealing flange. The elbow is connected to the junction box via a corrugated pipe.

[0017] The beneficial effects of the technical solution of this utility model are as follows: oil can be supplied to the bearings and gears in the gearbox through any oil inlet flange. The dual oil inlet structure design can effectively reduce the length of the oil circuit in the gearbox. Even with the space limitation caused by the screw pump, oil can still be supplied in both directions and the oil circuit can be unobstructed, thereby reducing the oil pressure loss. Attached Figure Description

[0018] Figure 1 Schematic diagram of the gearbox structure Figure 1 ;

[0019] Figure 2 for Figure 1 Sectional view along line AA;

[0020] Figure 3 for Figure 1 Sectional view along the BB direction;

[0021] Figure 4 for Figure 3 C-axis sectional view;

[0022] Figure 5 This is a schematic diagram of the connection structure between the bellows and the lower housing.

[0023] Figure 6 for Figure 4 Sectional view at point E in the middle;

[0024] Figure 7 Schematic diagram of the gearbox structure Figure 2 ;

[0025] Figure 8 for Figure 7 Sectional view from the FF direction.

[0026] Figure label:

[0027] 1. Lower housing; 2. Upper housing; 3. Vent cap; 4. Baffle plate; 5. Positioning key; 6. First oil inlet flange; 7. Gasket; 8. Plug; 9. Return oil flange; 10. Screw pump; 11. Bellows; 12. Junction box; 13. Third bracket; 14. Connector; 15. Sealing flange; 16. Elbow; 17. Second oil inlet flange; 18. Second oil injection pipe; 19. Oil distribution pipe; 20. Pressure plate; 21. First oil injection pipe; 2 2. Throttling block; 23. Second bracket; 24. Vibration probe; 25. Third fuel injection pipe; 26. Speed ​​probe; 27. First bracket; 28. Second oil seal; 29. ​​Output shaft; 30. Third bearing; 31. First bearing; 32. Input shaft; 33. First oil seal; 34. Second bearing; 35. Fourth bearing; 36. Drive gear; 37. Speed ​​measuring gear; 38. Pump shaft; 39. Fifth bearing; 40. Output gear. Detailed Implementation

[0028] 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 intended to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0031] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Example 1

[0034] like Figures 1 to 8 The disclosed dual-inlet internal pipeline gearbox with screw pump includes a housing, an input shaft 32, an output shaft 29, and a pump shaft 38. The input shaft 32, output shaft 29, and pump shaft 38 are all rotatably mounted on the housing via bearings, and are connected by a drive mechanism. Two inlet flanges are installed on the housing, and the two inlet flanges are connected by a distributor pipe 19, allowing oil to enter the distributor pipe 19 through either inlet flange.

[0035] Oil is supplied to the bearings, input shaft 32, output shaft 29 and pump shaft 38 in the gearbox through two oil inlet flanges.

[0036] With this configuration, oil can be supplied to the bearings and gears in the gearbox through any oil inlet flange. The dual oil inlet design allows for bidirectional oil supply with smooth oil flow and low pressure loss, even when space is limited by the presence of a screw pump. Furthermore, this structure reduces manufacturing costs and saves materials.

[0037] In this embodiment, as Figure 2 As shown, an output gear 40 and a driving gear 36 are mounted on the output shaft 29, the input shaft 32 is an integrally formed gear shaft, and a driven gear is mounted on the pump shaft 38. The output shaft 29 is driven by the input shaft 32 through the meshing of the output gear 40, and the output shaft 29 is connected to the pump shaft 38 through the driving gear 36 and the driven gear. More preferably, as... Figure 1 and Figure 2 As shown, the screw pump 10 is mounted on the housing, and the pump shaft 38 is connected to the screw pump 10 in a driving connection. This configuration allows the screw pump 10 to draw power from the gearbox, improving the gearbox's integration. The driven gear is integrally formed with the pump shaft 38.

[0038] In this embodiment, as Figure 2 As shown, a speed measuring gear 37 is mounted on the output shaft 29, and a speed measuring probe 26 is mounted inside the gearbox via a first bracket 27. The speed measuring probe 26 can determine the output speed of the gearbox by detecting the speed measuring gear 37. Figure 8 As shown, the vibration probe 24 is mounted on the housing via the second bracket 23. The vibration probe 24 is used to detect the runout of the input shaft 32.

[0039] In this embodiment, as Figure 2 As shown, the input shaft 32 is mounted on the housing via the first bearing 31 and the second bearing 34, the output shaft 29 is mounted on the housing via the third bearing 30 and the fourth bearing 35, and the pump shaft 38 is mounted on the housing via the fifth bearing 39; wherein the first bearing 31, the second bearing 34, the third bearing 30, and the fourth bearing 35 are all sliding bearings. The first bearing 31 and the third bearing 30 are located at the rear end of the housing, and the second bearing 34 and the fourth bearing 35 are located at the front end of the housing.

[0040] In this embodiment, one end of the input shaft 32 is the input end, which extends from the housing, and a first oil seal 33 is provided between the input end and the housing; one end of the output shaft 29 is the output end, which extends from the housing, and a second oil seal 28 is provided between the output shaft 29 and the housing. Figure 1 As shown, a connecting seat is provided on the outer wall of the housing, and a positioning key 5 is provided on the connecting seat. The input end of the input shaft 32 extends from the inside of the connecting seat, and a baffle plate 4 is provided on the inside of the connecting seat.

[0041] In this embodiment, as Figure 1 As shown, the top of the gearbox is equipped with a vent cap 3 and an observation cover. The user can determine the internal structure of the gearbox through the observation cover.

[0042] In this embodiment, as Figures 1 to 5 As shown, junction box 12 is mounted on the side of the box via a third bracket 13. A connector 14 is fixed at the bottom of the box. One end of the connector is connected to the inside of the box, and the other end of the connector 14 is connected to elbow 16 via an oil-sealing flange 15. Elbow 16 is connected to junction box 12 via a bellows 11. Connector 14 is an oil-sealing gland connector.

[0043] In this embodiment, as Figure 1 As shown, the housing includes an upper housing 2 and a lower housing 1, which are fastened together to form the inner cavity of the housing. The output gear 40, driving gear 36, driven gear, speed measuring disc 37, and speed measuring probe 26 are all housed within the inner cavity of the housing. Figure 4 As shown, a pressure plate 20 is fixed on the lower housing 1, and the first bearing 31, the second bearing 34, the third bearing 30 and the fourth bearing 35 are all installed on the lower housing 1; wherein, the first bearing 31 and the third bearing 30 are located at the rear end of the lower housing 1, and the second bearing 34 and the fourth bearing 35 are located at the front end of the lower housing 1.

[0044] In this embodiment, the housing is provided with an elongated hole and multiple oil injection pipes. Any oil inlet flange supplies oil to the bearing on the housing through the elongated hole, and any oil inlet flange sprays oil to the gear meshing part inside the housing through the oil injection pipe.

[0045] Further preferred, such as Figures 1 to 3As shown, a first oil distribution block is installed on the housing, and a first oil inlet flange 6 is connected to the first oil distribution block. The first oil distribution block distributes the oil in the first oil inlet flange 6 to the oil distribution pipe 19, the elongated hole, the first oil injection pipe 21, and the second oil injection pipe 18. The meshing point of the input shaft 32 and the output gear 40 is located between the first oil injection pipe 21 and the second oil injection pipe 18. The oil enters the first bearing 31, the second bearing 34, the third bearing 30, and the fourth bearing 35 through the elongated hole. More preferably, the elongated hole is located at the right end of the lower housing 1, and the end plate of the elongated hole is provided with a gasket 7 and a screw plug 8 to seal the end of the elongated hole. Further, the elongated hole is located below the input shaft 32 and the output shaft 29, with one elongated hole located on the front side of the lower housing 1 and the other on the rear side of the lower housing 1. A first oil passage hole is provided on the elongated hole, and the oil in the elongated hole supplies oil to the bearings through the first oil passage hole.

[0046] Further preferred, such as Figure 4 and Figure 6 As shown, the housing is also provided with a second oil passage hole, which connects the fifth bearing 39 and the adjacent fourth bearing 35. Oil passing through the fourth bearing 35 can enter the fifth bearing 39 through the second oil passage hole. A throttling block 22 is provided at the second oil passage hole.

[0047] In a further preferred embodiment, a second oil distribution block is installed on the housing, and a second oil inlet flange 17 is connected to the second oil distribution block. The second oil inlet flange 17 is connected to the oil distribution pipe 19 and the third oil spray pipe 25 through the second oil distribution block. The third oil spray pipe 25 sprays oil to the meshing point of the driving gear 36 and the driven gear.

[0048] In this embodiment, the bidirectional oil inlet lubrication is specifically implemented as follows: when the oil is pumped out from the screw pump 10 and sent to the first oil inlet flange 6 through the external hydraulic hose, the oil at the first oil inlet flange 6 is distributed to the oil distribution pipe 19, the first oil injection pipe 21, the second oil injection pipe 18, and two elongated holes; the oil in the two elongated holes is supplied to the four sliding bearings through the first oil passage hole, and the oil output to the fourth bearing 35 is supplied to the fifth bearing 39 through the throttling block; the first oil injection pipe 21 and the second oil injection pipe 18 simultaneously supply oil to the meshing point of the input shaft 32 and the output gear 40; the oil distributed to the oil distribution pipe 19 is transported to the second oil inlet flange 17, and then the oil is distributed by the second oil distribution block to the third oil injection pipe 25 to supply oil to the meshing point of the driving gear 36 and the driven gear.

[0049] When the oil is pumped out from the screw pump 10 and sent to the second inlet flange 17 through the external hydraulic hose, the oil is distributed by the second oil distribution block to the third injection pipe 25 and the oil distribution pipe 19. The oil distributed by the second oil distribution block to the third injection pipe 25 is sprayed onto the meshing point of the drive gear 36 and the driven gear. The oil distributed to the oil distribution pipe 19 supplies oil to the first inlet flange 6. The oil at the first inlet flange 6 is dispersed by the first oil distribution block to the oil distribution pipe 19, the first injection pipe 21, the second injection pipe 18, and the two elongated holes. Among them, the oil in the two elongated holes is supplied to the four sliding bearings through the first oil passage hole, and the oil output to the fourth bearing 35 is supplied to the fifth bearing 39 through the throttling block.

[0050] Finally, the oil entering the tank returns to the user's main oil tank through the return flange of the lower tank 1.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A dual-inlet internal pipeline gearbox with a screw pump, characterized in that: It includes a housing, an input shaft (32), an output shaft (29), and a pump shaft (38). The input shaft (32), output shaft (29), and pump shaft (38) are all rotatably mounted on the housing via bearings, and the input shaft (32), output shaft (29), and pump shaft (38) are connected by a drive. Two oil inlet flanges are installed on the housing, and the two oil inlet flanges are connected by an oil distribution pipe (19), so that oil can enter the oil distribution pipe (19) through either oil inlet flange. Oil is supplied to the bearings, input shaft (32), output shaft (29) and pump shaft (38) in the gearbox through two oil inlet flanges.

2. The dual-inlet internal pipeline gearbox with screw pump according to claim 1, characterized in that: The output shaft (29) is equipped with an output gear (40) and a drive gear (36). The input shaft (32) is an integrally formed gear shaft. The pump shaft (38) is equipped with a driven gear. The output shaft (29) is driven by the input shaft (32) through the output gear (40). The output shaft (29) is connected to the pump shaft (38) through the drive gear (36) and the driven gear.

3. A dual-inlet internal pipeline gearbox with a screw pump according to claim 2, characterized in that: The housing is equipped with elongated holes and multiple oil injection pipes. Any oil inlet flange supplies oil to the bearings on the housing through the elongated holes, and any oil inlet flange sprays oil to the gear meshing area inside the housing through the oil injection pipes.

4. A dual-inlet internal pipeline gearbox with a screw pump according to claim 3, characterized in that: The first oil distribution block is installed on the housing. The first oil inlet flange (6) is connected to the first oil distribution block. The first oil distribution block distributes the oil in the first oil inlet flange (6) to the oil distribution pipe (19), the long hole, the first oil injection pipe (21), and the second oil injection pipe (18). The meshing point of the input shaft (32) and the output gear (40) is located between the first fuel injection pipe (21) and the second fuel injection pipe (18).

5. A dual-inlet internal pipeline gearbox with a screw pump according to claim 3, characterized in that: The housing is equipped with a second oil distribution block, a second oil inlet flange (17) and the second oil distribution block. The second oil inlet flange (17) is connected to the oil distribution pipe (19) and the third oil spray pipe (25) through the second oil distribution block. The third oil spray pipe (25) sprays oil to the meshing point of the driving gear (36) and the driven gear.

6. A dual-inlet internal pipeline gearbox with a screw pump according to claim 2, characterized in that: The screw pump (10) is mounted on the housing, and the pump shaft (38) is connected to the screw pump (10) via a drive.

7. A dual-inlet internal pipeline gearbox with a screw pump according to claim 2, characterized in that: The input shaft (32) is mounted on the housing via the first bearing (31) and the second bearing (33), the output shaft (29) is mounted on the housing via the third bearing (30) and the fourth bearing (35), and the pump shaft (38) is mounted on the housing via the fifth bearing (39); wherein the first bearing (31), the second bearing (33), the third bearing (30) and the fourth bearing (35) are all sliding bearings.

8. A dual-inlet internal pipeline gearbox with a screw pump according to claim 1, characterized in that: A speed measuring gear (37) is installed on the output shaft (29), and a speed measuring probe (26) is installed in the housing through the first bracket (27). The speed measuring probe (26) can determine the output speed of the gearbox by detecting the speed measuring gear (37).

9. A dual-inlet internal pipeline gearbox with a screw pump according to claim 1, characterized in that: The vibration probe (24) is mounted on the housing via the second bracket (23) and is used to detect the runout of the input shaft (32).

10. A dual-inlet internal pipeline gearbox with a screw pump according to claim 1, characterized in that: The junction box (12) is installed on the side of the box body via the third bracket (13). A connector (14) is fixed at the bottom of the box body. One end of the connector is connected to the inside of the box body, and the other end of the connector (14) is connected to the elbow (16) via the oil sealing flange (15). The elbow (16) is connected to the junction box (12) via the corrugated pipe (11).

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