Speed regulating device and fracturing pump

Abstract

The utility model discloses a speed regulating device and a fracturing pump, and relates to the field of oil and gas equipment. A speed regulating device comprises a speed reducer body, a main input mechanism, an auxiliary input mechanism and a clutch brake. The main input mechanism comprises a mounting seat and a transmission connecting piece, the mounting seat is connected with the speed reducer body, the transmission connecting piece is rotatably arranged on the mounting seat, and a first connecting sleeve and a second connecting sleeve are arranged at the two ends of the transmission connecting piece respectively. The first connecting sleeve is in spline connection with a first input shaft of the speed reducer body, and the second connecting sleeve is used for being in spline connection with an output shaft of the clutch brake. And the auxiliary input mechanism is in transmission connection with a second input shaft of the speed reducer body. The problem that fracturing equipment is limited can be solved.

Description

Technical Field

[0001] This application belongs to the technical field of oil and gas equipment, specifically relating to a speed regulating device and a fracturing pump. Background Technology

[0002] In the development of oil and gas fields, fracturing is the main method for reservoir stimulation and production enhancement. The construction process is mainly achieved through fracturing pumping equipment. By injecting high-pressure, high-volume fracturing fluid into the oil and gas reservoir, the formation is broken up, proppant is squeezed into the fractures, artificial fractures and diversion channels are formed, and the oil and gas recovery rate is improved.

[0003] As a crucial component of fracturing equipment, the plunger pump is used to pressurize and pump the working medium, such as sand-carrying fracturing fluid, into the well. Its structure is mostly horizontal or reciprocating, typically consisting of three parts: a power unit, a hydraulic unit, and a gearbox. The gearbox reduces the rotational speed of the external power source and increases torque; the power unit converts external power into reciprocating motion via a crank-connecting rod mechanism and transmits it to the hydraulic unit; the hydraulic unit converts the mechanical energy transmitted from the power unit into the pressure energy of the working medium.

[0004] Piston pumps are typically driven by diesel engines, electric motors, or turbine engines. Diesel engines are shifted via a gearbox, while electric motors achieve stepless speed regulation via a frequency converter. Turbine engines are divided into single-shaft turbine engines and dual-shaft turbine engines. Dual-shaft turbine engines allow the speed to vary within a certain range, while single-shaft turbine engines have a constant output speed and require a matching speed change device. It is difficult to match suitable speed change devices with high-power fracturing equipment, thus limiting the promotion and application of turbine fracturing equipment. Utility Model Content

[0005] The purpose of this application is to provide a speed regulating device and a fracturing pump that can solve problems such as limitations in fracturing equipment.

[0006] To solve the above-mentioned technical problems, this application is implemented as follows:

[0007] This application provides a speed regulating device, including: a reducer body, a main input mechanism, an auxiliary input mechanism, and a clutch brake;

[0008] The main input mechanism includes a mounting base and a transmission connector. The mounting base is connected to the reducer body. The transmission connector is rotatably mounted on the mounting base. The two ends of the transmission connector are respectively provided with a first connecting sleeve and a second connecting sleeve. The first connecting sleeve is splinedly connected to the first input shaft of the reducer body. The second connecting sleeve is used to splinely connect to the output shaft of the clutch brake.

[0009] The auxiliary input mechanism is connected to the second input shaft of the reducer body.

[0010] This application also provides a fracturing pump, including the speed regulating device described above.

[0011] In this embodiment, the clutch brake and the reducer body are connected by a transmission connector to transmit the main power received by the clutch brake to the reducer body, so that the reducer body can drive the downstream hydraulic end to perform stable operation. At the same time, the clutch brake can also control the engagement or disengagement of power. The auxiliary input mechanism can transmit auxiliary power to the reducer body, so that the reducer body can drive the downstream hydraulic end to adjust the displacement. Attached Figure Description

[0012] Figure 1 This is a first structural schematic diagram of the speed regulating device disclosed in the embodiments of this application;

[0013] Figure 2 This is a second structural schematic diagram of the speed regulating device disclosed in the embodiments of this application;

[0014] Figure 3 This is a cross-sectional view of the reducer body, main input mechanism, and auxiliary input mechanism disclosed in the embodiments of this application;

[0015] Figure 4 This is a partial cross-sectional view of the main input mechanism disclosed in the embodiments of this application;

[0016] Figure 5 This is a schematic diagram of the transmission connection component disclosed in the embodiments of this application;

[0017] Figure 6 This is a cross-sectional view of the transmission connector disclosed in the embodiments of this application;

[0018] Figure 7 This is a cross-sectional view of the mounting base disclosed in the embodiments of this application;

[0019] Figure 8 This is a schematic diagram of the fracturing pump, deceleration device, and drive device disclosed in the embodiments of this application.

[0020] Explanation of reference numerals in the attached figures:

[0021] 01-Speed ​​control device;

[0022] 10-Reducer body; 11-First input shaft; 12-Second input shaft;

[0023] 20-Main input mechanism; 21-Mounting base; 211-Mounting channel; 212-Oil return channel; 22-Transmission connector; 221-First connecting sleeve; 222-Second connecting sleeve; 223-First stepped surface; 224-Second stepped surface; 225-Third stepped surface; 226-Limiting protrusion; 23-First bearing; 24-Second bearing; 25-Wear-resistant sleeve; 251-Second serration; 26-End cover; 261-Through hole; 262-First serration; 263-Sealing groove;

[0024] 30 - Auxiliary input mechanism; 31 - Drive flange;

[0025] 40 - Clutch / brake; 41 - Output shaft;

[0026] 50 - Limit plate;

[0027] 60-Fasteners;

[0028] 70 - Seals;

[0029] 02-Reduction gear;

[0030] 03-Drive device. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0033] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0034] refer to Figures 1 to 8This application discloses a speed regulating device 01, which includes a reducer body 10, a main input mechanism 20, an auxiliary input mechanism 30, and a clutch brake 40.

[0035] The reducer body 10 is a basic component that can reduce speed. In addition, the reducer body 10 can also adjust the speed to meet the operating requirements under different working conditions.

[0036] In order to input active power and auxiliary power to the reducer body 10, in this embodiment of the application, the main input mechanism 20 and the auxiliary input mechanism 30 can be connected to the main power input end and the auxiliary power input end of the reducer body 10 respectively, so as to transmit active power and auxiliary power to the reducer body 10 through the main input mechanism 20 and the auxiliary input mechanism 30 respectively.

[0037] Optionally, the reducer body 10 may have a first input shaft 11 and a second input shaft 12. The first input shaft 11 serves as the main power input end and is connected to the main input mechanism 20; the second input shaft 12 serves as the auxiliary power input end and is connected to the auxiliary input mechanism 30. Optionally, both the first input shaft 11 and the second input shaft 12 may be splined shafts.

[0038] Optionally, in the first operating mode, the main input mechanism 20 is started and the auxiliary input mechanism 30 is stopped, so as to transmit the main power to the reducer body 10 through the main input mechanism 20, causing the fracturing pump to operate at a first displacement. In the second operating mode, the main input mechanism 20 is stopped and the auxiliary input mechanism 30 is started, so as to transmit auxiliary power to the reducer body 10 through the auxiliary input mechanism 30, so as to enable the fracturing pump to operate at a second displacement less than the first displacement, and it can also perform variable speed operation. In the third operating mode, both the main input mechanism 20 and the auxiliary input mechanism 30 are started, so as to transmit the main power and auxiliary power to the reducer body 10 through the main input mechanism 20 and the auxiliary input mechanism 30 respectively, so as to enable the fracturing pump to operate at a third displacement greater than the first displacement, and it can also perform variable speed operation. It should be noted here that the specific structure of the reducer body 10 and its deceleration and speed regulation principles can be referred to the prior art, and will not be described in detail here.

[0039] To achieve the transmission connection between the main input mechanism 20 and the reducer body 10, the main input mechanism 20 may include a mounting base 21 and a transmission connector 22. The mounting base 21 is connected to the reducer body 10, and the transmission connector 22 is rotatably mounted on the mounting base 21.

[0040] Optionally, the mounting base 21 can be fastened to the side of the housing of the reducer body 10 using fastening screws to ensure the installation stability of the mounting base 21. Additionally, the mounting base 21 can have an inner cavity in which the transmission connector 22 is rotatably disposed. On the one hand, the mounting base 21 supports the transmission connector 22 to ensure its reliable and stable rotation; on the other hand, the mounting base 21 also protects the transmission connector 22 to prevent external factors from interfering with its normal operation.

[0041] To control the engagement or disengagement of the main power unit, a clutch brake 40 can be provided between the main input mechanism 20 and the main power unit. The clutch brake 40 enables power transmission or disconnection between the main input mechanism 20 and the main power unit, and can also have a braking function. It should be noted that the specific structure and working principle of the clutch brake 40 can be found in existing technology and will not be elaborated upon here.

[0042] To connect the clutch / brake 40 to the reducer body 10, the two ends of the transmission connector 22 can be respectively provided with a first connecting sleeve 221 and a second connecting sleeve 222. The first connecting sleeve 221 is splinedly connected to the first input shaft 11 of the reducer body 10, and the second connecting sleeve 222 is splinedly connected to the output shaft 41 of the clutch / brake 40. Based on this, the first input shaft 11 and the output shaft 41 can be connected via the transmission connector 22, facilitating the transmission of power from the clutch / brake 40 to the reducer body 10. Furthermore, the spline connection improves transmission stability, reduces transmission vibration and noise, and has a simple structure, making installation convenient. Optionally, both the first connecting sleeve 221 and the second connecting sleeve 222 can be splined sleeves.

[0043] In addition, the auxiliary input mechanism 30 is connected to the second input shaft 12 of the reducer body 10 so as to transmit auxiliary power to the reducer body 10 via the second input shaft 12, thereby realizing speed regulation of the reducer body 10.

[0044] In this embodiment, the clutch brake 40 and the reducer body 10 are connected by a transmission connector 22. The main power received by the clutch brake 40 is transmitted to the reducer body 10 via the transmission connector 22, so that the reducer body 10 can drive the downstream hydraulic end to perform stable operation. At the same time, the clutch brake 40 can also control the engagement or disengagement of power. The auxiliary input mechanism 30 can transmit auxiliary power to the reducer body 10, so that the reducer body 10 can drive the downstream hydraulic end to adjust the displacement.

[0045] In some embodiments, the outer wall of the transmission connector 22 may be provided with a first stepped surface 223 and a second stepped surface 224, wherein the first stepped surface 223 is correspondingly disposed with the first connecting sleeve 221, and the second stepped surface 224 is correspondingly disposed with the second connecting sleeve 222. Optionally, the transmission connector 22 may be a cylindrical sleeve structure, with one end being the first connecting sleeve 221 and the other end being the second connecting sleeve 222, wherein the first stepped surface 223 is located on the outer wall of the first connecting sleeve 221, and the second stepped surface 224 is located on the outer wall of the second connecting sleeve 222.

[0046] Furthermore, the main input mechanism 20 may also include a first bearing 23 and a second bearing 24. The first bearing 23 is connected between the first stepped surface 223 and the mounting base 21, and the second bearing 24 is connected between the second stepped surface 224 and the mounting base 21. Based on this, the first bearing 23 can support and fix the first connecting sleeve 221 to ensure its smooth rotation, and the second bearing 24 can support and fix the second connecting sleeve 222 to ensure its smooth rotation.

[0047] Optionally, the first bearing 23 and the second bearing 24 can both be tapered roller bearings. Of course, they can also be other types of bearings, which are not specifically limited here.

[0048] Additionally, an annular protrusion may be provided on the outer wall of the transmission connector 22 in the area between the first stepped surface 223 and the second stepped surface 224. This annular protrusion extends circumferentially along the transmission connector 22, and the shaft ends of the first bearing 23 and the second bearing 24 abut against the annular protrusion to limit the first bearing 23 and the second bearing 24 axially. Of course, the other shaft end of the first bearing 23 and the second bearing 24 can also be limited by other structures.

[0049] Optionally, the other end of the first bearing 23 can be limited by a protrusion structure provided on the mounting base 21, and the other end of the second bearing 24 can be limited by a protrusion structure provided on the end cap 26 connected to the mounting base 21.

[0050] In some embodiments, the main input mechanism 20 may further include a wear-resistant sleeve 25, which may be fitted over the outside of the transmission connector 22 to provide protection for at least a portion of the transmission connector 22. Additionally, the outer wall of the wear-resistant sleeve 25 may be connected to the mounting base 21 or the end cap 26 to provide support for the wear-resistant sleeve 25. Optionally, the inner or outer surface of the wear-resistant sleeve 25 may be hardened.

[0051] To enable the assembly of the wear-resistant sleeve 25 and the transmission connector 22, the outer wall of the transmission connector 22 may be provided with a third step surface 225. The third step surface 225 is correspondingly provided with the second connecting sleeve 222, and the third step surface 225 is located on the side of the second step surface 224 that is away from the first step surface 223.

[0052] Optionally, the third step surface 225 is closer to the center line of the transmission connector 22 than the second step surface 224, and the third step surface 225 is located on the outer wall of the second connecting sleeve 222.

[0053] The wear-resistant sleeve 25 is located on the outer side of the third step surface 225, thus providing support and protection for the area of ​​the third step surface 225. Optionally, the wear-resistant sleeve 25 and the third step surface 225 can be interference-fitted; of course, the wear-resistant sleeve 25 and the third step surface 225 can also be clearance-fitted.

[0054] In some embodiments, the main input mechanism 20 may further include an end cap 26, which is disposed on the side of the mounting base 21 opposite to the reducer body 10. Optionally, the end cap 26 may be installed to the end of the mounting base 21 by fastening screws, so that the end cap 26 and the mounting base 21 together form a mounting cavity to realize the installation of the first bearing 23, the second bearing 24 and the transmission connector 22.

[0055] The end cap 26 also abuts against the second bearing 24 to provide axial restraint for the second bearing 24. Optionally, the side of the end cap 26 may be provided with an annular protrusion that abuts against the outer ring of the second bearing 24.

[0056] The end cap 26 is provided with a through hole 261, and the second connecting sleeve 222 of the transmission connector 22 passes through the through hole 261 to facilitate transmission connection with the output shaft 41 of the clutch brake 40. In addition, the hole wall of the through hole 261 can also provide support for the wear-resistant sleeve 25.

[0057] Furthermore, the inner wall of the through hole 261 may be provided with a first serration 262. Correspondingly, the wear-resistant sleeve 25 is provided in the through hole 261, and the outer wall of the wear-resistant sleeve 25 is in clearance fit with the first serration 262. In this way, the first serration 262 can support the wear-resistant sleeve 25 and also provide a certain sealing effect.

[0058] For example, the first serration 262 may be wrapped around the outside of the wear-resistant sleeve 25 once; of course, the first serration 262 may also be wrapped around the outside of the wear-resistant sleeve 25 multiple times.

[0059] In addition, the outer wall of the wear-resistant sleeve 25 may be provided with a second serration 251, which is arranged along the axial direction of the wear-resistant sleeve 25 with the first serration 262. In this way, the sealing effect can be further improved by the cooperation of the first serration 262 and the second serration 251.

[0060] In other embodiments, the first serration 262 and the second serration 251 may also be arranged in a cross pattern to form a labyrinth-like sealing structure, thereby improving the sealing effect and preventing lubricating oil leakage.

[0061] In some embodiments, the inner wall of the through hole 261 may also be provided with a sealing groove 263, which contains a sealing substance. In this way, the sealing substance can ensure the sealing between the end cap 26 and the wear-resistant sleeve 25. Optionally, the sealing substance can be sealing grease, sealing oil, or of course, a sealing ring, sealing gasket, etc.

[0062] In some embodiments, the mounting base 21 may be provided with a mounting channel 211, the space inside the mounting channel 211 being the inner cavity of the mounting base 21, and the transmission connector 22 being rotatably disposed within the mounting channel 211 to ensure that the transmission connector 22 can rotate smoothly.

[0063] In addition, an oil return channel 212 may be provided on the inner wall of the installation channel 211 and in the area below the transmission connector 22. The oil return channel 212 extends along the axial direction of the installation channel 211. In this way, lubricating oil, sealing oil, etc. dripped from the transmission connector 22 can flow along the oil return channel 212 in the installation channel 211, so as to discharge the lubricating oil, sealing oil, etc. and prevent them from accumulating in the installation channel 211.

[0064] Considering that the first input shaft 11 passes through the first connecting sleeve 221 and is splined with the first connecting sleeve 221, in order to achieve axial limiting of the first input shaft 11, in this embodiment of the application, the first connecting sleeve 221 is connected to the second connecting sleeve 222, and a limiting protrusion 226 can be provided on the inner wall between the first connecting sleeve 221 and the second connecting sleeve 222. The limiting protrusion 226 is arranged circumferentially along the transmission connector 22; the first input shaft 11 passes through the first connecting sleeve 221, and the shaft end of the first input shaft 11 abuts against the limiting protrusion 226. Based on this, the limiting protrusion 226 can play a role in axially limiting the first input shaft 11 to prevent the first input shaft 11 from moving axially.

[0065] Furthermore, the speed regulating device 01 may also include a limiting plate 50 and a fastener 60. The limiting plate 50 is located on the side of the limiting protrusion 226 opposite to the input shaft, and the fastener 60 securely connects the limiting plate 50 and the first input shaft 11. Based on this configuration, the first input shaft 11 can be connected to the limiting protrusion 226 by the fastener 60 to ensure that the first input shaft 11 will not detach from the limiting protrusion 226, thus achieving the axial limiting effect on the first input shaft 11.

[0066] In some embodiments, a seal 70 may be provided between the shaft end of the first input shaft 11 and the limiting protrusion 226. The seal 70 can seal the area between the shaft end of the first input shaft 11 and the limiting protrusion 226 to prevent lubricating oil leakage. Optionally, the seal 70 may be a sealing ring, a sealing gasket, or the like.

[0067] To achieve the transmission connection between the auxiliary input mechanism 30 and the reducer body 10, the auxiliary input mechanism 30 may include a drive flange 31, which is splinedly connected to the second input shaft 12. In this way, auxiliary power can be transmitted to the second input shaft 12 through the drive flange 31 to facilitate speed regulation of the reducer body 10.

[0068] Based on the aforementioned speed regulating device 01, this application also discloses a fracturing pump, which includes the aforementioned speed regulating device 01. Of course, the fracturing pump may also include a hydraulic end and a power end. The power end may include a drive device 03 and a reduction device 02. The drive device 03 is drive-connected to the reduction device 02, and the reduction device 02 includes a main power transmission path and an auxiliary power transmission path. The main power transmission path is drive-connected to the clutch brake 40, and the auxiliary power transmission path is drive-connected to the auxiliary input mechanism 30.

[0069] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A speed regulation device, characterized in that The utility model relates to a kind of auxiliary input mechanism, including: Speed reducer body (10), main input mechanism (20), auxiliary input mechanism (30) and clutch brake (40); The main input mechanism (20) includes mounting seat (21) and transmission connecting piece (22), the mounting seat (21) is connected with the speed reducer body (10), the transmission connecting piece (22) is rotatably arranged in the mounting seat (21), both ends of the transmission connecting piece (22) are respectively provided with first connecting sleeve (221) and second connecting sleeve (222), the first connecting sleeve (221) is spline connected with the first input shaft (11) that the speed reducer body (10) has, and the second connecting sleeve (222) is used for spline connection with the output shaft (41) of the clutch brake (40); The auxiliary input mechanism (30) is drivingly connected with the second input shaft (12) that the speed reducer body (10) has.

2. The speed regulation device of claim 1, wherein The outer wall of the transmission connecting piece (22) is provided with a first step surface (223) and a second step surface (224), the first step surface (223) is correspondingly arranged with the first connecting sleeve (221), and the second step surface (224) is correspondingly arranged with the second connecting sleeve (222); The main input mechanism (20) further includes a first bearing (23) and a second bearing (24), the first bearing (23) is connected between the first step surface (223) and the mounting seat (21), and the second bearing (24) is connected between the second step surface (224) and the mounting seat (21).

3. The speed regulation device of claim 2, wherein The outer wall of the transmission connecting piece (22) is further provided with a third step surface (225), the third step surface (225) is correspondingly arranged with the second connecting sleeve (222), and the third step surface (225) is located on the side of the second step surface (224) away from the first step surface (223); The main input mechanism (20) further includes a wear-resistant sleeve (25), and the wear-resistant sleeve (25) is arranged outside the third step surface (225).

4. The speed regulation device of claim 3, wherein The main input mechanism (20) further includes an end cover (26), the end cover (26) is arranged on the side of the mounting seat (21) away from the speed reducer body (10) and abuts against the second bearing (24); The end cover (26) is provided with a through hole (261), an inner wall of the through hole (261) is provided with a first sawtooth (262), the wear-resistant sleeve (25) is arranged in the through hole (261), and an outer wall of the wear-resistant sleeve (25) is gap-fitted with the first sawtooth (262); The outer wall of the wear-resistant sleeve (25) is provided with a second sawtooth (251), and the second sawtooth (251) is arranged along the axial direction of the wear-resistant sleeve (25) with the first sawtooth (262).

5. The speed regulation device of claim 4, wherein The inner wall of the through hole (261) is further provided with a sealing groove (263), and a sealing substance is arranged in the sealing groove (263).

6. The speed regulation device according to any one of claims 1 to 5, characterized in that The mounting seat (21) is provided with a mounting channel (211), and the transmission connecting piece (22) is rotatably arranged in the mounting channel (211). An inner wall of the mounting channel (211) and a region below the transmission connecting piece (22) is provided with an oil return flow channel (212) extending along an axial direction of the mounting channel (211).

7. The speed regulation device according to any one of claims 1 to 5, characterized in that The first connecting sleeve (221) and the second connecting sleeve (222) are in communication, and an inner wall therebetween is provided with a limiting protrusion (226) arranged in a circumferential direction; The first input shaft (11) is arranged in the first connecting sleeve (221), and an axial end of the first input shaft (11) abuts against the limiting protrusion (226). The speed regulating device (01) further comprises a limiting plate (50) and a fastener (60), the limiting plate (50) is arranged on a side of the limiting protrusion (226) away from the first input shaft (11), and the fastener (60) fastens the limiting plate (50) and the first input shaft (11).

8. The speed regulation device of claim 7, wherein A sealing member (70) is arranged between the axial end of the first input shaft (11) and the limiting protrusion (226).

9. The speed regulation device of claim 1, wherein The auxiliary input mechanism (30) comprises a driving flange (31), and the driving flange (31) is splined connected with the second input shaft (12).

10. A fracturing pump characterized by, The speed regulating device (01) comprises any one of claims 1 to 9. An inner wall of the mounting channel (211) and a region below the transmission connecting piece (22) is provided with an oil return flow channel (212) extending along an axial direction of the mounting channel (211). The first connecting sleeve (221) and the second connecting sleeve (222) are in communication, and an inner wall therebetween is provided with a limiting protrusion (226) arranged in a circumferential direction; The first input shaft (11) is arranged in the first connecting sleeve (221), and an axial end of the first input shaft (11) abuts against the limiting protrusion (226). The speed regulating device (01) further comprises a limiting plate (50) and a fastener (60), the limiting plate (50) is arranged on a side of the limiting protrusion (226) away from the first input shaft (11), and the fastener (60) fastens the limiting plate (50) and the first input shaft (11). A sealing member (70) is arranged between the axial end of the first input shaft (11) and the limiting protrusion (226). The auxiliary input mechanism (30) comprises a driving flange (31), and the driving flange (31) is splined connected with the second input shaft (12). The speed regulating device (01) comprises any one of claims 1 to 9.

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