A speed reducer for a submersible screw pump oil production system

Abstract

The present invention discloses a speed reducer for a submersible screw pump oil production system, comprising a driving mechanism and a filtering mechanism, wherein the left portion of the input shaft of the driving mechanism is provided with a magnet and a filter of the filtering mechanism, the middle portion of the input shaft is sleeved with a bearing and an oil guide wheel in sequence, the right portion of the input shaft is meshed with a planetary gear arranged around a planetary frame through a first gear, the right side of the filter is threadedly connected to a sleeve cup outside the bearing, the right end of the oil guide wheel is provided with an oil guide plate connected to the planetary frame, a gear ring meshed with the planetary gear is provided between the first shell and the second shell of the speed reducer, and a first oil passage chamber and a second oil passage chamber connected are provided between the first shell and the sleeve cup. The present invention adopts a speed reducer for a submersible screw pump oil production system of the above structure to effectively filter metal impurities in the lubricating oil, and at the same time, the internal and external circulation paths of the lubricating oil ensure the cooling effect.

Description

Technical Field

[0001] The invention relates to the technical field of speed reducers, and in particular to a speed reducer for a submersible screw pump oil production system. Background Art

[0002] The submersible screw pump oil extraction device used in oil fields is mainly composed of a submersible motor, a protector, a reducer, a reducer protector, a self-aligning coupling and a screw pump. The reducer achieves the purpose of deceleration by meshing the gear with fewer teeth on the input shaft with the large gear on the output shaft, and the lubricating oil of the reducer has an important influence on the working state and life of the reducer. The lubricating oil directly affects the working effect of the reducer, but the existing reducer lubricating oil will contain more impurities after a long time of use, mainly metal impurities such as iron filings that are not conducive to lubrication, and the cooling effect will also affect the reducer. Summary of the invention

[0003] The purpose of the present invention is to provide a speed reducer for a submersible screw pump oil production system, which can effectively filter metal impurities in lubricating oil, and at the same time, the internal and external circulation paths of the lubricating oil can ensure the cooling effect.

[0004] To achieve the above-mentioned purpose, the present invention provides a reduction gear device for a submersible screw pump oil production system, comprising a driving mechanism and a filtering mechanism, wherein a magnet and a filter of the filtering mechanism are provided on the left portion of an input shaft of the driving mechanism, a bearing and an oil guide wheel are sequentially sleeved on the middle portion of the input shaft, the right portion of the input shaft is meshed with a planetary gear arranged around a planetary carrier through a first gear, the right side of the filter is threadedly connected to a sleeve cup on the outer side of the bearing, an oil guide plate connected to the planetary carrier is provided on the right end of the oil guide wheel, a gear ring meshed with the planetary gear is provided between the first housing and the second housing of the reduction gear, and a first oil passage chamber and a second oil passage chamber that are connected are provided between the first housing and the sleeve cup.

[0005] Preferably, the outer wall of the filter is provided with a first oil hole, and the inner wall thereof is provided with a second oil hole, a filter screen is provided in a filter tank connected between the first oil hole and the second oil hole, the axial cross-section of the filter tank is in a "convex" shape, the left end of the filter is connected to the magnet on the outside of the filter screen, and sealing rings are provided on both left and right ends of the filter.

[0006] Preferably, a third oil chamber is provided between the outer wall of the connection between the filter and the sleeve cup and the first shell, a fourth oil chamber is provided between the inner wall of the filter and the input shaft, and the right end of the fourth oil chamber is connected to the fifth oil chamber at the left end of the bearing.

[0007] Preferably, the number of the bearings is two, and a sixth oil chamber is provided between the first sleeve between the bearings and the inner wall of the sleeve cup. The sixth oil chamber is connected with the left side of the power chamber between the oil guide wheel and the sleeve cup through the bearing, and the right side of the power chamber is connected with the oil guide plate.

[0008] Preferably, the diameter of the oil guide plate gradually decreases from left to right, the oil guide wheel is provided on the left side of the oil guide plate, the diameter of the meshing point between the first gear and the planetary gear is smaller than the diameter of the right end of the oil guide plate, and an oil guide wheel sleeve is provided between the oil guide wheel and the bearing.

[0009] Preferably, an oil-passing ring cavity is provided on the left side of the meshing position between the planetary gear and the gear ring close to the side of the oil guide plate, and the oil-passing ring cavity is communicated with the first oil-passing cavity.

[0010] Preferably, a first annular positioning groove is provided at the right end of the first shell, and a second annular positioning groove is provided at the left end of the second shell, and both the first positioning groove and the second positioning groove match the side wall of the fixing ring of the gear ring.

[0011] Preferably, a flange head is provided at the left end of the first shell, and a flange seat is provided at the right end of the second shell.

[0012] Preferably, the bearing matches the inner wall of the left portion of the sleeve cup, the diameter of the inner wall of the right portion of the sleeve cup is larger than the diameter of the oil guide wheel, and the diameter of the right end of the sleeve cup is larger than the diameter of the left end of the oil guide plate.

[0013] Preferably, the length of the first gear matches the length of the planet carrier.

[0014] Therefore, the present invention adopts a speed reducer of a submersible screw pump oil production system of the above structure to effectively filter metal impurities in the lubricating oil. At the same time, the internal and external circulation paths of the lubricating oil ensure the cooling effect.

[0015] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side cross-sectional view of a speed reducer of a submersible screw pump oil production system of the present invention;

[0017] Figure 2 It is an enlarged view of the speed reducer A of the oil production system of a submersible screw pump of the present invention;

[0018] Figure 3 It is a quarter cross-sectional view of a speed reducer of a submersible screw pump oil production system of the present invention;

[0019] Figure 4The invention discloses a quarter cross-sectional view of a filter of a speed reducer of a submersible screw pump oil production system.

[0020] Reference numerals

[0021] 1. Input shaft; 2. Magnet; 3. Filter; 4. Oil guide wheel; 5. First gear; 6. Planet carrier; 7. Planetary gear; 8. Filter tank; 9. Cup; 10. Bearing; 11. Oil guide plate; 12. Ring gear; 13. First oil chamber; 14. Second oil chamber; 15. Third oil chamber; 16. Fourth oil chamber; 17. Fifth oil chamber; 18. Sixth oil chamber; 19. First housing; 20. Second housing; 21. Filter screen; 22. Power chamber; 23. Oil ring chamber; 24. First oil hole; 25. Second oil hole; 26. First positioning groove; 27. Second positioning groove. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0023] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Figure 1 It is a side cross-sectional view of a speed reducer of a submersible screw pump oil production system of the present invention. Figure 2 This is an enlarged view of the speed reducer A of a submersible screw pump oil production system of the present invention. Figure 3 This is a quarter cross-sectional view of a speed reducer of a submersible screw pump oil production system according to the present invention. Figure 4The present invention is a quarter cross-sectional view of a filter of a speed reducer of a submersible screw pump oil production system. As shown in the figure, a speed reducer of a submersible screw pump oil production system includes a driving mechanism and a filtering mechanism. The left part of the input shaft 1 of the driving mechanism is provided with a magnet 2 and a filter 3 of the filtering mechanism, the middle part of the input shaft 1 is sleeved with a bearing 10 and an oil guide wheel 4 in sequence, and the right part of the input shaft 1 is meshed with a planetary gear 7 arranged around the planetary carrier 6 through a first gear 5. The right side of the filter 3 is threadedly connected with the sleeve cup 9 outside the bearing 10, and the right end of the oil guide wheel 4 is provided with an oil guide plate 11 connected to the planetary carrier 6. A gear ring 12 meshing with the planetary gear 7 is provided between the first housing 19 and the second housing 20 of the speed reducer, and a first oil passage chamber 13 and a second oil passage chamber 14 are connected between the first housing 19 and the sleeve cup 9. The driving mechanism drives the speed reducer to move with the motor, and the filtering mechanism filters the lubricating oil inside the speed reducer. The rotation is input from the spline at the left end of the input shaft 1, driving the input shaft 1 to rotate, and the input shaft 1 drives the first gear 5 to rotate. The first gear 5 drives the planetary gear 7 meshing with it to rotate, and the planetary gear 7 rotating with the input shaft 1 moves along the meshing gear ring 12, and the gear ring 12 is fixed and does not rotate. The oil guide wheel 4 sleeved on the input shaft 1 rotates with the input shaft 1, stirring the lubricating oil inside the power chamber 22 to form a pressure difference, driving the lubricating oil to flow from left to right. The lubricating oil inside the power chamber 22 passes through the oil guide plate 11, the meshing part of the first gear 5 and the planetary gear 7, the meshing part of the planetary gear 7 and the gear ring 12, the oil ring cavity 23, the first oil cavity 13, the second oil cavity 14 and the third oil cavity 15 to the filter 3 in sequence. The lubricating oil filtered by the filter 3 then passes through the fourth oil cavity 16, the fifth oil cavity 17, the bearing 10, the sixth oil cavity 18 and the bearing 10 in sequence to return to the power chamber 22, realizing the circulation cooling of the lubricating oil inside the reduction device and filtering of metal impurities.

[0025] The outer wall of the filter 3 is provided with a first oil hole 24, and the inner wall thereof is provided with a second oil hole 25. A filter screen 21 is provided in the filter tank 8 connected between the first oil hole 24 and the second oil hole 25. The axial cross section of the filter tank 8 is in a "convex" shape. The left end of the filter 3 is connected to the magnet 2 outside the filter screen 21, and sealing rings are provided at both ends of the filter 3. The lubricating oil enters the filter tank 8 inside the filter 3 through the first oil hole 24, and then flows out of the filter 3 through the second oil hole 25. The filter screen 21 of the filter tank 8 filters metal impurities such as iron filings in the lubricating oil, and the magnet 2 adsorbs the metal impurities to prevent the metal impurities from entering the next cycle with the lubricating oil and affecting the service life of the bearing 10, the first gear 5, the planetary gear 7 and the ring gear 12.

[0026] A third oil passage cavity 15 is provided between the outer wall of the connection between the filter 3 and the sleeve cup 9 and the first housing 19, and a fourth oil passage cavity 16 is provided between the inner wall of the filter 3 and the input shaft 1. The right end of the fourth oil passage cavity 16 is connected to the fifth oil passage cavity 17 at the left end of the bearing 10. The provision of multiple oil passage cavities can fully cool the circulating lubricating oil.

[0027] There are two bearings 10, and a sixth oil passage chamber 18 is provided between the first sleeve between the bearings 10 and the inner side wall of the sleeve cup 9. The sixth oil passage chamber 18 is connected to the left side of the power chamber 22 between the oil guide wheel 4 and the sleeve cup 9 through the bearing 10, and the right side of the power chamber 22 is connected to the oil guide plate 11. The internal thread of the sleeve cup 9 matches the external thread of the filter 3, so that the connection and fixation between the filter 3 and the sleeve cup 9 are realized.

[0028] The diameter of the oil guide plate 11 gradually decreases from left to right, and an oil guide wheel 4 is provided on the left side of the oil guide plate 11. The diameter of the meshing point between the first gear 5 and the planetary gear 7 is smaller than the diameter of the right end of the oil guide plate 11, and an oil guide wheel sleeve is provided between the oil guide wheel 4 and the bearing 10. The shape of the oil guide plate 11 cooperates with the oil guide wheel 4 to drive the circulation of lubricating oil inside the reduction device. The setting of the guide wheel sleeve limits the position of the oil guide wheel 4 on the input shaft 1 to prevent the oil guide wheel 4 from sliding and contacting the side wall of the sleeve cup 9 when it moves. The setting of the diameter of the right end of the oil guide plate 11 facilitates the lubricating oil flowing out of the oil guide plate 11 to smoothly enter the meshing point between the first gear 5 and the planetary gear 7, and the lubricating oil then enters the meshing point between the planetary gear 7 and the ring gear 12 as the planetary gear 7 rotates.

[0029] An oil ring cavity 23 is provided on the left side of the meshing place between the planetary gear 7 and the gear ring 12 near the oil guide plate 11, and the oil ring cavity 23 is connected with the first oil cavity 13. The lubricating oil at and near the meshing place between the planetary gear 7 and the gear ring 12 drives the lubricating oil into the oil ring cavity 23 under the action of pressure. Both ends of the gear ring 12 are sleeved with sealing rings on the first housing 19 and the second housing 20 to prevent the lubricating oil from leaking.

[0030] A first annular positioning groove 26 is provided at the right end of the first housing 19, and a second annular positioning groove 27 is provided at the left end of the second housing 20. The first positioning groove 26 and the second positioning groove 27 are both matched with the side wall of the fixing ring of the gear ring 12. Both ends of the fixing ring of the gear ring 12 are connected to the first positioning groove 26 and the second positioning groove 27 respectively, and after connection, the fixing ring is fixed to the first housing 19 and the second housing 20 with screws.

[0031] A flange head is provided at the left end of the first housing 19, and a flange seat is provided at the right end of the second housing 20. A groove for placing a sealing ring is provided at the left end of the first housing 19. The left end of the first housing 19 is the lower end in actual work, and is connected to the flange seat of the submersible motor through the flange head. The right end of the second housing 20 is the upper end in actual work, and is connected to the flange head of the protector through the flange seat.

[0032] The bearing 10 matches the inner wall of the left part of the sleeve cup 9, the inner wall of the right part of the sleeve cup 9 has a diameter greater than the diameter of the oil guide wheel 4, and the diameter of the right end of the sleeve cup 9 is greater than the diameter of the left end of the oil guide plate 11. The shape of the sleeve cup 9 matches its internal structure to achieve cooling circulation of the lubricating oil.

[0033] The length of the first gear 5 matches that of the planet carrier 6 . The eight rotating shafts and the eight planetary gears 7 mounted thereon are symmetrically arranged on the left and right parts of the planet carrier 6 . Four planetary gears 7 are arranged on each side of the planet carrier 6 .

[0034] When in use, the entire reduction gear is filled with lubricating oil, and the rotation of the input shaft 1 drives the oil guide wheel 4 to rotate, thereby driving the lubricating oil in the power chamber 22 to move to the oil guide pan 11. The lubricating oil in the oil guide pan 11 passes through the meshing part of the first gear 5 and the planetary gear 7, the meshing part of the planetary gear 7 and the gear ring 12, the first oil passage chamber 13, the second oil passage chamber 14, and the third oil passage chamber 15 to the inside of the filter 3. The filter screen 21 inside the filter 3 filters the metal impurities, and the magnet 2 adsorbs the metal impurities. The filtered lubricating oil moves out of the filter 3 and enters the fourth oil passage chamber 16, and then passes through the fifth oil passage chamber 17, the bearing 10, the sixth oil passage chamber 18 and the bearing 10 in turn to return to the inside of the power chamber 22 for the next cycle.

[0035] Therefore, the present invention adopts a speed reducer of a submersible screw pump oil production system of the above structure to effectively filter metal impurities in the lubricating oil. At the same time, the internal and external circulation paths of the lubricating oil ensure the cooling effect.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A speed reducer for a submersible screw pump oil production system, characterized in that: It comprises a driving mechanism and a filtering mechanism, wherein the magnet and the filter of the filtering mechanism are arranged at the left part of the input shaft of the driving mechanism, the bearing and the oil guide wheel are sleeved in sequence at the middle part of the input shaft, the right part of the input shaft is meshed with the planetary gear arranged around the planetary carrier through the first gear, the right side of the filter is threadedly connected with the sleeve cup outside the bearing, the right end of the oil guide wheel is provided with an oil guide plate connected with the planetary carrier, a gear ring meshed with the planetary gear is arranged between the first housing and the second housing of the reduction device, and a first oil passage cavity and a second oil passage cavity communicated with each other are arranged between the first housing and the sleeve cup; The outer wall of the filter is provided with a first oil hole, and the inner wall thereof is provided with a second oil hole. A filter screen is provided in a filter tank connected between the first oil hole and the second oil hole. The axial cross section of the filter tank is in a "convex" shape. The left end of the filter is connected to the magnet outside the filter screen. Sealing rings are provided at both left and right ends of the filter. A third oil passage cavity is provided between the outer side wall of the connection between the filter and the sleeve cup and the first shell, a fourth oil passage cavity is provided between the inner side wall of the filter and the input shaft, and the right end of the fourth oil passage cavity is connected to the fifth oil passage cavity at the left end of the bearing; There are two bearings, and a sixth oil passage cavity is provided between the first sleeve between the bearings and the inner side wall of the sleeve cup. The sixth oil passage cavity is connected with the left side of the power cavity between the oil guide wheel and the sleeve cup through the bearing, and the right side of the power cavity is connected with the oil guide plate; The diameter of the oil guide plate gradually decreases from left to right, the oil guide wheel is provided on the left side of the oil guide plate, the diameter of the meshing point between the first gear and the planetary gear is smaller than the diameter of the right end of the oil guide plate, and an oil guide wheel sleeve is provided between the oil guide wheel and the bearing; An oil-passing ring cavity is provided on the left side of the meshing position between the planetary gear and the gear ring close to one side of the oil guide plate, and the oil-passing ring cavity is communicated with the first oil-passing cavity.

2. The speed reducer of the submersible screw pump oil production system according to claim 1, characterized in that: A first annular positioning groove is provided at the right end of the first shell, and a second annular positioning groove is provided at the left end of the second shell. Both the first positioning groove and the second positioning groove match the side wall of the fixing ring of the gear ring.

3. The speed reducer of the submersible screw pump oil production system according to claim 1, characterized in that: A flange head is provided at the left end of the first shell, and a flange seat is provided at the right end of the second shell.

4. The speed reducer of the submersible screw pump oil production system according to claim 1, characterized in that: The bearing matches the inner wall of the left part of the sleeve cup, the inner wall of the right part of the sleeve cup has a diameter larger than the diameter of the oil guide wheel, and the diameter of the right end of the sleeve cup is larger than the diameter of the left end of the oil guide plate.

5. The speed reducer of the submersible screw pump oil production system according to claim 1, characterized in that: The length of the first gear matches the length of the planet carrier.

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