Multi-drag-one reduction gearbox of drilling pump

Abstract

The invention discloses a drill pump multi-drag-one reduction gearbox which comprises a shell, a large gear and a gear shaft are arranged in the shell and meshed to form a gear pair, a motor mounting flange seat, a reduction gearbox mounting flange and a large gear supporting cover are fixed to the shell, and the large gear supporting cover is located on the outer side of one end face of the large gear. The two shaft ends of the large gear are provided with large gear supporting bearings, the shaft diameters of the two shaft heads of the gear shaft are unequal, and the two shaft heads of the gear shaft are provided with an input shaft supporting bearing I and an input shaft supporting bearing II respectively. According to the invention, the stress conditions of a gear pair, a supporting bearing and the like in the reduction gearbox are improved, and the universality of the reduction gearbox and the driving motor is also remarkably improved for drilling pump sets with different powers and different power requirements of the drilling pump sets.

Description

Technical Field

[0001] The invention belongs to the technical field of oil and gas equipment and relates to a drilling pump with multiple reduction gearboxes. Background Art

[0002] Drilling pumps are essential components of oil drilling rigs. At present, each input shaft end of a drilling pump generally adopts a power input mode of a power source, and the power source mostly adopts a high-power motor. However, large motors are not only high in power and cost, but also large in size. In addition, many conventional drilling pump units mostly use a single or multiple motors through one or two complex transmission systems to drive the drilling pump input shaft, resulting in a large size and weight of the pump unit, low transmission efficiency of the transmission system, and poor versatility of the motor and transmission system for drilling pump units of different powers. Summary of the invention

[0003] The purpose of the present invention is to provide a drilling pump with multiple reduction gearboxes, and the versatility of the reduction gearbox and the driving motor is significantly improved for drilling pump groups with different powers and different power requirements of the drilling pump groups.

[0004] The technical solution adopted by the present invention is that a drilling pump is dragged with a reduction gearbox, including a shell, a large gear and a gear shaft are arranged in the shell, the large gear and the gear shaft are meshed to form a gear pair, a motor mounting flange seat, a reduction gearbox mounting flange and a large gear support cover are fixed on the shell, the large gear support cover is located on the outside of one end face of the large gear, large gear support bearings are arranged at both ends of the large gear, the shaft diameters of the two shaft heads of the gear shaft are different, and the two shaft heads of the gear shaft are respectively provided with input shaft support bearing I and input shaft support bearing II.

[0005] The present invention is also characterized in that:

[0006] A plurality of gear shafts are arranged, and the plurality of gear shafts are evenly distributed on the outside of the large gear.

[0007] There are several gear shafts evenly distributed.

[0008] Both the large gear and the gear shaft are herringbone gears.

[0009] A large gear support cover mounting hole is provided in the center of the large gear support cover, a plurality of reduction box mounting holes are evenly provided on the outer circumference of the large gear support cover mounting hole on the large gear support cover, and a mounting hole cover plate is provided in the reduction box mounting hole.

[0010] Large gear retaining rings are arranged at both ends of the large gear, and large gear bearing caps I and II are arranged on the outsides of the large gear support bearings at both ends of the large gear. The large gear bearing cap II is fixedly connected to the housing, and the large gear bearing cap I is fixed to the large gear support cap mounting hole of the large gear support cap.

[0011] Input shaft bearing caps I and II are respectively arranged on the outside of input shaft support bearings I and II, and both input shaft bearing caps I and II are fixedly connected to the housing. Input shaft support bearing I is arranged on the shaft head with a smaller shaft diameter of the gear shaft, and input shaft bearing cap I is fixed to the side of the housing where the large gear support cap is fixed. Input shaft retaining rings I and II are also respectively arranged on the two shaft heads of the gear shaft, and input shaft retaining ring I is arranged on the shaft head with a smaller shaft diameter of the gear shaft.

[0012] A plurality of large gear weight reduction holes are evenly arranged on the gear plate of the large gear.

[0013] The motor mounting flange seat is arranged on the side of the housing where the large gear support cover is fixed, and the reduction box mounting flange is arranged on the side of the housing where the large gear bearing cover II is fixed.

[0014] A sealing groove is provided on the contact surface between the large gear support cover and the housing, and a sealing ring is arranged in the sealing groove.

[0015] The beneficial effects of the present invention are:

[0016] The drilling pump of the present invention has a reduction gearbox, which can be directly installed on the input shaft end of the drilling pump compared with the current drilling pump transmission system, significantly shortening the length of the conventional motor rear motor belt pump group, significantly reducing the overall dimensions of the drilling pump group and the input motor, and also significantly reducing the number of components in the transmission system and avoiding the use of wearing parts such as belts; in addition, compared with the conventional rear motor belt pump group, the drilling pump of the present invention has a reduction gearbox which can significantly improve the poor stress conditions of the drilling pump and the motor, and increase the service life of the motor, the reduction gearbox and the drilling pump; finally, since the reduction gearbox adopts a distributed multi-head power input method, not only the stress conditions of the gear pairs, support bearings, etc. inside the reduction gearbox are improved, but also the versatility of the reduction gearbox and the drive motor is significantly improved for drilling pump groups of different powers and different power requirements of the drilling pump groups. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the appearance and cross-sectional view of the drilling pump with multiple reduction gearboxes of the present invention, wherein: Figure 1 (a) is a schematic diagram of the structure of a drilling pump with multiple reduction gearboxes according to the present invention, Figure 1 (b) is a schematic structural diagram of the drilling pump of the present invention with a reduction gearbox from another angle. Figure 1 (c) is a cross-sectional view of a drilling pump according to the present invention with a reduction gearbox;

[0018] Figure 2 It is an exploded view of the components of the drilling pump dragging a reduction box according to the present invention;

[0019] Figure 3 This is the appearance and cross-sectional view of a drilling pump with multiple reduction gearbox housings according to the present invention, wherein: Figure 3 (a) is a front view of a drilling pump with a reduction gearbox housing according to the present invention, Figure 3 (b) Yes Figure 3 (a) A-A cross-sectional view, Figure 3 (c) is a schematic diagram of the structure of a drilling pump with a reduction gearbox housing according to the present invention;

[0020] Figure 4 This is the appearance and cross-sectional view of a drilling pump with a reduction gearbox large gear support cover of the present invention, wherein: Figure 4 (a) is a schematic diagram of the structure of a drilling pump with a reduction gearbox large gear support cover according to the present invention. Figure 4 (b) is a cross-sectional view of a support cover of a large gear of a reduction gearbox in a drilling pump according to the present invention;

[0021] Figure 5 It is a structural schematic diagram of a drilling pump with multiple reduction box gear transmission pairs according to the present invention.

[0022] In the figure, 1. housing, 2. large gear, 3. gear shaft, 4. large gear support cover, 5. input shaft support bearing Ⅰ, 6. input shaft retaining ring Ⅰ, 7. input shaft bearing cover Ⅰ, 8. large gear retaining ring, 9. mounting hole cover, 10. large gear bearing cover Ⅰ, 11. large gear support bearing, 12. input shaft support bearing Ⅱ, 13. input shaft retaining ring Ⅱ, 14. input shaft bearing cover Ⅱ, 15. large gear bearing cover Ⅱ, 17. large gear weight reduction hole, 18. motor mounting flange seat, 19. reduction gearbox mounting hole, 20. input shaft support large hole, 21. input shaft support small hole, 22. large gear support cover mounting hole, 23. sealing groove, 25. reduction gearbox mounting flange. DETAILED DESCRIPTION

[0023] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] This embodiment provides a drilling pump with multiple reduction gearboxes, such as Figure 1-2 As shown, it includes a housing 1, in which a large gear 2 and a gear shaft 3 are arranged, and a plurality of large gear weight reduction holes 17 are evenly opened on the gear plate of the large gear 2. The large gear 2 is meshed with the gear shaft 3 to form a gear pair, as shown in FIG. Figure 3 As shown, the housing 1 is fixed with a motor mounting flange seat 18, a reduction gearbox mounting flange 25 and a large gear support cover 4, and the large gear support cover 4 is located outside one end face of the large gear. Figure 4As shown, a sealing groove 23 is provided on the contact surface between the large gear support cover 4 and the housing 1, and a sealing ring is arranged in the sealing groove 23. Large gear support bearings 11 are provided at both ends of the large gear 2. The shaft diameters of the two shaft heads of the gear shaft 3 are different. The two shaft heads of the gear shaft 3 are respectively provided with input shaft support bearings Ⅰ5 and input shaft support bearings Ⅱ12. The two shaft heads of the gear shaft 3 are also respectively provided with input shaft retaining rings Ⅰ6 and input shaft retaining rings Ⅱ13. The input shaft retaining ring Ⅰ6 is arranged on the shaft head with a smaller shaft diameter of the gear shaft 3. Input shaft bearing holes are respectively provided at the corresponding positions of the input shaft support bearings Ⅰ5 and the input shaft support bearings Ⅱ12 on the housing 1. The input shaft bearing holes of the housing 1 adopt an integral design structure. Compared with the split case body and cover of the conventional split reducer that bears the force at both ends of the input shaft respectively, the housing structure of the invention not only improves the force condition of the reducer housing, but also significantly improves the positioning and installation accuracy of the input gear shaft 3.

[0026] Example 2

[0027] This embodiment provides a drilling pump with multiple reduction gearboxes. Based on the embodiment 1, four gear shafts 3 are provided, such as Figure 5 As shown, four gear shafts 3 are evenly distributed on the outside of the large gear 2. The large gear 2 is driven by four small gear shafts 3. Both the large gear 2 and the gear shafts 3 are herringbone gear structures with wide backing grooves. The matching structure of the herringbone gears can eliminate the axial force generated by the gear pair during transmission. At the same time, the four gear shafts 3 adopt a uniformly arranged structure, so that the radial forces generated by the large gear 2 during operation offset each other. Therefore, the distribution structure of the herringbone gear pair and the gear shaft 3 of the reduction box in this embodiment greatly improves the force condition of the large gear, and thus significantly reduces the load on the supporting bearings at both ends of the large gear 2.

[0028] Example 3

[0029] The present embodiment provides a drilling pump with multiple reduction gear boxes. On the basis of Embodiment 2, a large gear support cover mounting hole 22 is provided in the center of the large gear support cover 4, and a plurality of reduction gear box mounting holes 19 are evenly provided on the outer side of the circumference of the large gear support cover mounting hole 22 on the large gear support cover 4, and a mounting hole cover plate 9 is provided in the reduction gear box mounting hole 19.

[0030] Large gear retaining rings 8 are provided at both ends of the large gear 2, and large gear bearing caps Ⅰ10 and large gear bearing caps Ⅱ15 are respectively provided on the outer sides of the large gear support bearings 11 at both ends of the large gear 2. The large gear bearing caps Ⅱ15 are fixedly connected to the housing 1, and the large gear bearing caps Ⅰ10 are fixed to the large gear support cap mounting holes 22 of the large gear support cap 4. The motor mounting flange seat 18 is provided on the side of the housing 1 where the large gear support cap 4 is fixed, and the reduction box mounting flange 25 is provided on the side of the housing 1 where the large gear bearing caps Ⅱ15 are fixed.

[0031] Input shaft bearing caps Ⅰ7 and Ⅱ14 are respectively arranged on the outside of input shaft support bearing Ⅰ5 and input shaft support bearing Ⅱ12. Input shaft support small holes 21 and input shaft support large holes 20 are respectively opened on the housing 1 at positions corresponding to the input shaft bearing caps Ⅰ7 and Ⅱ14. The input shaft bearing caps Ⅰ7 and Ⅱ14 are both fixedly connected to the housing 1. The input shaft support bearing Ⅰ5 is arranged on the shaft head with a smaller shaft diameter of the gear shaft 3. The input shaft bearing cap Ⅰ7 is fixed to the side of the housing 1 where the large gear support cap 4 is fixed.

[0032] The installation process of the drilling pump with multiple reduction gearboxes of the present invention is as follows:

[0033] When installing on the housing 1, all gear shafts 3 should be inserted into the housing from the input shaft support large hole 20, and the bearings and retaining rings at both ends are not installed yet; then the large gear 2 is installed in the housing 1 cavity through the large gear support cover installation hole 22 of the housing 1, and then the large gear support cover 4 is positioned and installed on the housing 1 through the large gear support cover installation hole 22, wherein a sealing ring is installed in the sealing groove 23 of the large gear support cover 4 to seal it to prevent oil leakage from the reduction box. When installing the large gear support cover 4, attention should be paid to its installation orientation to avoid contact with the input shaft at the small end of the gear shaft 3. The input shaft bearing cover Ⅰ7 interferes with each other. After the large gear support cover 4 is installed, the large gear support bearings 11 at both ends of the large gear 2, two large gear retaining rings 8, the large gear support bearing cover 10 and the large gear bearing cover Ⅱ15 can be installed to complete the installation of the large gear 2; finally, the input shaft support bearing Ⅰ5, the input shaft support bearing Ⅱ16, the input shaft retaining ring Ⅰ6, the input shaft retaining ring Ⅱ13, the input shaft bearing cover Ⅰ7 and the input shaft bearing cover Ⅱ14 at both ends of the gear shaft 3 can be installed, and the multi-drag one reduction gearbox of the present invention is installed.

[0034] From the above content, it can be known that the drilling pump of the present invention has a reduction box, which mainly includes a housing, a large gear 2, a gear shaft 3, a bearing cover, a bearing and other parts, wherein the large gear 2 and the gear shaft 3 both adopt a herringbone gear structure, and the large gear 2 is driven by multiple gear shafts 3, which well ensures that the axial force and radial force generated by the large gear 2 located in the middle position during the rotation process are offset each other, thereby reducing the force on wearing parts such as bearings and improving the life of the reduction box; the input shaft support holes on both sides of the reduction box housing 1 adopt an integrated structure, which not only reduces the errors caused by many current reduction boxes due to the use of a split structure, but also greatly improves the stress condition of the housing, and significantly improves the ability of the reduction box housing 1 to withstand the radial force of the gear shaft 3; in addition, in order to reduce the installation size of the reduction box, the reduction box of the present invention adopts the housing's own flange to be directly connected to the drilling pump, and the evenly distributed mounting holes on the support cover on one side of the large gear 2 shaft and the large gear weight reduction holes 17 are used to install the connecting bolts with the drilling pump from the inside of the housing 1, and then the evenly distributed mounting holes on the large gear support cover 4 are blocked with a cover plate to prevent oil leakage.

[0035] The drilling pump of the present invention can use multiple reduction gearboxes to drive the drilling pump according to the actual use and different power requirements, without changing the specifications and models of the input motor, and purposefully use several input shafts for power input, thereby improving the versatility of the reduction gearbox and the motor.

Claims

1. The drilling pump is equipped with a reduction gearbox, which is characterized by: The invention comprises a housing (1), wherein a large gear (2) and a gear shaft (3) are arranged in the housing (1), wherein the large gear (2) meshes with the gear shaft (3) to form a gear pair, wherein a motor mounting flange seat (18), a reduction gear box mounting flange (25) and a large gear support cover (4) are fixed to the housing (1), wherein the large gear support cover (4) is located on the outer side of one end face of the large gear, and large gear support bearings (11) are arranged at both shaft ends of the large gear (2), and the shaft diameters of the two shaft heads of the gear shaft (3) are different, and the two shaft heads of the gear shaft (3) are respectively provided with an input shaft support bearing I (5) and an input shaft support bearing II (12).

2. The drilling pump with multiple reduction gearboxes according to claim 1 is characterized in that: A plurality of gear shafts (3) are provided, and the plurality of gear shafts (3) are evenly distributed on the outside of the large gear (2).

3. The drilling pump with multiple reduction gearboxes according to claim 2 is characterized in that: There are four gear shafts (3) evenly distributed.

4. The drilling pump with multiple reduction gearboxes according to claim 1 is characterized in that: The large gear (2) and the gear shaft (3) are both herringbone gears.

5. The drilling pump with multiple reduction gearboxes according to claim 1 is characterized in that: A large gear support cover mounting hole (22) is provided in the center of the large gear support cover (4), a plurality of reduction gear box mounting holes (19) are evenly provided on the outer circumference of the large gear support cover mounting hole (22) on the large gear support cover (4), and a mounting hole cover plate (9) is provided in the reduction gear box mounting hole (19).

6. The drilling pump with multiple reduction gearboxes according to claim 5 is characterized in that: The large gear (2) is provided with a large gear retaining ring (8) at both ends of the shaft, and a large gear bearing cover I (10) and a large gear bearing cover II (15) are respectively provided on the outside of the large gear support bearings (11) at both ends of the shaft of the large gear (2), the large gear bearing cover II (15) is fixedly connected to the housing (1), and the large gear bearing cover I (10) is fixed to the large gear support cover mounting hole (22) of the large gear support cover (4).

7. The drilling pump with multiple reduction gearboxes according to claim 1 is characterized in that: An input shaft bearing cap I (7) and an input shaft bearing cap II (14) are respectively arranged on the outside of the input shaft support bearing I (5) and the input shaft support bearing II (12); the input shaft bearing cap I (7) and the input shaft bearing cap II (14) are both fixedly connected to the housing (1); the input shaft support bearing I (5) is arranged on the shaft head with a smaller shaft diameter of the gear shaft (3); the input shaft bearing cap I (7) is fixed to a side of the housing (1) on which the large gear support cap (4) is fixed; the two shaft heads of the gear shaft (3) are also respectively arranged with an input shaft retaining ring I (6) and an input shaft retaining ring II (13); the input shaft retaining ring I (6) is arranged on the shaft head with a smaller shaft diameter of the gear shaft (3).

8. The drilling pump with multiple reduction gearboxes according to claim 1 is characterized in that: A plurality of large gear weight reduction holes (17) are evenly arranged on the gear plate of the large gear (2).

9. The drilling pump with multiple reduction gearboxes according to claim 1, characterized in that: The motor mounting flange seat (18) is arranged on the side of the housing (1) on which the large gear support cover (4) is fixed, and the reduction box mounting flange (25) is arranged on the side of the housing (1) on which the large gear bearing cover II (15) is fixed.

10. The drilling pump with multiple reduction gearboxes according to claim 1, characterized in that: A sealing groove (23) is provided on the contact surface between the large gear support cover (4) and the housing (1), and a sealing ring is provided in the sealing groove (23).

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