Crankshaft of slurry pump

Abstract

The utility model discloses a mud pump crankshaft which comprises a shaft body. The crankshaft supports and the connecting rod connecting disc are arranged on the shaft body at intervals in the length direction and integrally formed with the shaft body, the crankshaft supports are used for being connected with a rolling bearing in a slurry pump rack bearing seat hole in a matched and sleeved mode, and the connecting rod connecting disc is used for being in transmission connection with a slurry pump connecting rod; and the power connecting end is fixedly arranged at the end part of the shaft body and is in transmission connection with the output end of the reduction gearbox through a crowned tooth or spline structure. By changing the crankshaft structure and arranging the special power connecting end on the crankshaft body, the slurry pump crankshaft can be directly connected with the reduction gearbox in a new transmission mode, and compared with a traditional belt transmission and chain transmission mode, the transmission efficiency and the slurry pump bearing capacity can be effectively improved; therefore, the high-power and high-load development trend of the slurry pump is adapted.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid pumps, and more specifically, to a mud pump crankshaft. Background Art

[0002] In recent years, continuous breakthroughs have been made in the development of deep shale oil and gas, and the demand for drilling pressure and displacement has increased, which has put higher requirements on the adaptability and reliability of mud pumps.

[0003] The crankshaft is one of the most critical transmission components in a mud pump. Traditional mud pumps typically use a motor to transmit power to the mud pump pinion shaft via a belt or chain drive. The small gear on the mud pump pinion shaft meshes with the large gear on the crankshaft, transmitting the operating torque to the crankshaft and driving the mud pump. This belt and chain transmission method has low transmission efficiency and is prone to belt slippage and breakage under high-load conditions. This makes it unsuitable for the current trend toward high-power, high-load mud pumps.

[0004] In order to solve the above problems, it is necessary to design a mud pump crankshaft. By changing the crankshaft structure, a new transmission method can be applied to the mud pump, thereby improving the transmission efficiency and the load-bearing capacity of the mud pump. Utility Model Content

[0005] The purpose of the utility model is to provide a mud pump crankshaft that can be directly connected to a reduction box, thereby improving transmission efficiency and adapting to high-load working conditions compared to traditional mud pumps, and adapting to the current development trend of high-power and high-load mud pumps.

[0006] In order to achieve these purposes and other advantages according to the present invention, a mud pump crankshaft is provided, comprising:

[0007] Axis;

[0008] Crankshaft supports and connecting rod connecting plates are arranged on the shaft body at intervals along the length direction and are integrally formed therewith. The crankshaft supports are configured to be fitted with rolling bearings in the bearing seat holes of the mud pump frame, and the connecting rod connecting plates are configured to be drivingly connected to the connecting rods of the mud pumps.

[0009] The power connection end is fixedly arranged at the end of the shaft body, and the power connection end is transmission-connected to the output end of the reduction box through a drum-shaped tooth or a spline structure.

[0010] Preferably, the crankshaft of the mud pump, the crankshaft support includes a plurality of support seats, which are arranged on the shaft body at intervals, and any support seat is a cylindrical structure coaxially arranged with the shaft body.

[0011] Preferably, for the mud pump crankshaft, the connecting rod connecting disks include at least three connecting rod connecting disks, which are arranged at intervals on the shaft body. Any connecting rod connecting disk is of a disk structure and is arranged coaxially or non-coaxially with the shaft body.

[0012] Preferably, for the mud pump crankshaft, when there is one power connection end, it is located at any end of the shaft body; when there are two power connection ends, they are respectively located at both ends of the shaft body.

[0013] Preferably, for the mud pump crankshaft, the power connection end includes a sleeve, which is integrally connected with the shaft body and fixed at its end. The sleeve is in transmission connection with the output end of the reduction box through a drum-shaped tooth or spline structure.

[0014] Preferably, for the mud pump crankshaft, the power connection end includes a sleeve, which is detachably connected to the end of the shaft body through a flange. The sleeve is in transmission connection with the output end of the reduction box through a drum-shaped tooth or spline structure.

[0015] Preferably, for the mud pump crankshaft, continuously arranged circumferentially on the outer cylindrical surface of the sleeve are external drum-shaped teeth, external involute splines or external rectangular splines.

[0016] Preferably, for the mud pump crankshaft, continuously arranged circumferentially on the inner cylindrical surface of the sleeve are internal involute splines or internal rectangular splines.

[0017] The present utility model has at least the following beneficial effects:

[0018] By changing the crankshaft structure and arranging a special power connection end on the crankshaft body of the mud pump, the mud pump crankshaft can be directly connected to the reduction box through a new transmission method. Compared with the mud pump structures with traditional belt drive or chain drive, the transmission efficiency and the load-bearing capacity of the mud pump are effectively improved, and it can better adapt to the development trend of high power and high load of the mud pump, having good development prospects.

[0019] Other advantages, objectives and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic structural diagram of a mud pump crankshaft according to an embodiment of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the mud pump crankshaft according to another embodiment of the present utility model;

[0022] Figure 3 It is a schematic structural diagram of the mud pump crankshaft according to another embodiment of the present utility model;

[0023] Figure 4 Schematic diagram of the connection structure between the power connection end and the flange in the above embodiment;

[0024] Figure 5 This is a schematic diagram of the connection structure between the power connection end and the flange in another embodiment of the present invention.

[0025] Description of reference numerals:

[0026] 1. Power connection end; 1-1. Flange; 1-1-1. Sleeve; 1-1-2. Locating stop; 1-1-3. Bolt hole; 1-1-4. Locating hole; 1-2. Bolt; 1-3. Locating pin; 2. Connecting rod connecting plate; 3. Crankshaft support. DETAILED DESCRIPTION

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0028] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "horizontal", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] like Figures 1-5 As shown, the utility model provides a mud pump crankshaft, comprising:

[0030] Axis;

[0031] The crankshaft support 3 and the connecting rod connecting plate 2 are arranged on the shaft body at intervals along the length direction and are integrally formed therewith. The crankshaft support 3 is configured to be sleeved with the rolling bearing in the bearing seat hole of the mud pump frame, and the connecting rod connecting plate 2 is configured to be drivingly connected to the mud pump connecting rod;

[0032] The power connection end 1 is fixedly arranged at the end of the shaft body, and the power connection end 1 is transmission-connected to the output end of the reduction gearbox through a drum-shaped tooth or a spline structure.

[0033] In the above technical solution, the crankshaft support 3 and the connecting rod connecting disc 2 are both convex structures integrally formed with the shaft body and extending radially outward therefrom, and their outer side walls are toroidal structures. Among them, the crankshaft support 3 is used to enable the entire crankshaft to be smoothly installed on the mud pump frame. Specifically, the crankshaft support 3 can be fitted into a rolling bearing located in the bearing seat hole of the mud pump frame and fixedly connected to its inner ring, so as to realize the stable support of the mud pump frame for the entire crankshaft, and at the same time enable the crankshaft to rotate smoothly on the mud pump frame; the connecting rod connecting disc 2 can be connected to the mud pump connecting rod through structures such as a bearing bush or a rolling bearing. The power connection end 1 is provided with a crowned gear or a spline structure for receiving and transmitting the torque output by the reduction gearbox, so that the power connection end can be directly fitted and connected to the output end of the reduction gearbox, and there is no need to additionally provide transmission mechanisms such as belts and chains. Thus, when the reduction gearbox outputs torque, the entire crankshaft receives the torque output by the reduction gearbox and rotates synchronously under the action of the power connection end, and then transmits the movement of the crankshaft to the mud pump connecting rod through the connecting rod connecting disc.

[0034] The utility model changes the conventional crankshaft structure. Through the cooperation of the crankshaft support, the connecting rod connecting disc and the power connection end on the shaft body, a new transmission method can be applied to the mud pump. The mud pump adopting the crankshaft structure of the utility model can effectively improve the transmission efficiency and the load-bearing capacity of the mud pump compared with the traditional mud pump adopting belt drive and chain drive methods, and adapt to the development trend of high power and high load of the mud pump.

[0035] In another technical solution, for the mud pump crankshaft, the crankshaft support 3 includes a plurality of support seats, which are arranged at intervals (along the length direction of the shaft body) on the shaft body, and any one of the support seats is a cylindrical structure coaxial with the shaft body.

[0036] Among them, the outer side wall of the support seat is a cylindrical surface coaxial with the central axis of the crankshaft, and its size is designed according to the rolling bearing to be installed on the bearing seat of the mud pump frame, and is used to transmit the support force provided by the bearing seat of the mud pump frame for the crankshaft after installing the above rolling bearing. In this embodiment, the crankshaft support includes two support seats.

[0037] In another technical solution, for the mud pump crankshaft, the connecting rod connecting disc 2 includes at least three connecting rod connecting discs, which are arranged at intervals (along the length direction of the shaft body) on the shaft body, and any one of the connecting rod connecting discs 2 is a disc structure, which is coaxial or non-coaxial with the shaft body. A bearing bush or a rolling bearing can be installed on the connecting rod connecting disc to smoothly transmit the movement of the crankshaft to the connecting rod. Specifically, when the connecting rod connecting disc is set as a disc structure non-coaxial with the central axis (of the shaft body), an integral eccentric disc structure can be adopted, or an eccentric wheel can be additionally sleeved outside the circular connecting disc to achieve the same effect.

[0038] In another technical solution, for the mud pump crankshaft, when there is one power connection end 1, it is located at any end of the shaft body; when there are two power connection ends 1, they are respectively located at both ends of the shaft body. That is, the power connection end can be set at one end of the shaft body or can be set at both ends of the shaft body simultaneously, both for transmission connection.

[0039] In another technical solution, for the mud pump crankshaft, the power connection end 1 includes a sleeve 1-1-1, which is integrally connected with the shaft body and fixed at its end, and the sleeve 1-1-1 is in transmission connection with the output end of the reduction box through a drum-shaped tooth or spline structure.

[0040] Under the above connection method, the power connection end and the shaft body are of an integral structure, as Figures 1-2 shown, which is beneficial to ensuring the integrity and transmission stability of the crankshaft.

[0041] In another technical solution, for the mud pump crankshaft, the power connection end 1 includes a sleeve 1-1-1, which is detachably connected to the end of the shaft body through a flange 1-1, and the sleeve 1-1-1 is in transmission connection with the output end of the reduction box through a drum-shaped tooth or spline structure.

[0042] Under the above connection method, the power connection end and the shaft body are of a split structure, as Figures 3-5 shown, the sleeve 1-1-1 of the power connection end is connected to the end of the shaft body through the flange 1-1, where the flange is used to achieve the detachable connection with the shaft body, and the sleeve is used to achieve the direct connection with the output end of the reduction box. This method can effectively improve the setting flexibility of the power connection end. Specifically, a plurality of bolt holes 1-1-3 and a plurality of positioning holes 1-1-4 are alternately arranged along the circumferential direction on the end face of the flange 1-1. Any bolt hole 1-1-3 and any positioning hole 1-1-4 are arranged along the axial direction of the flange and penetrate its front and rear end faces. At the same time, corresponding connection holes are also provided at the end of the shaft body to cooperate with the above bolt holes and positioning holes. When installing the power connection end 1, a plurality of positioning pins 1-3 are passed through the corresponding positioning holes 1-1-4 and connection holes to achieve the precise alignment of the flange and the shaft body, and then a plurality of bolts 1-2 are inserted into the corresponding bolt holes 1-1-3 and connection holes and tightened to achieve the stable connection between the flange (power connection end) and the end of the shaft body. In addition, a positioning stop 1-1-2 is also provided at the end face of the flange 1-1 close to the shaft body to further ensure that the flange can be smoothly positioned and connected with the shaft body, improving the operability and convenience of installation.

[0043] In another technical solution, for the mud pump crankshaft, external drum-shaped teeth, external involute splines or external rectangular splines are continuously arranged on the outer circumferential surface of the sleeve 1-1-1. There are different setting forms for the drum-shaped teeth or spline structures on the sleeve for direct connection with the output end of the reduction gearbox. In the above technical solution, an external form is adopted, and specifically, it can be selectively set as external drum-shaped teeth, external involute splines or external rectangular splines.

[0044] For the above setting forms of the drum-shaped teeth or spline structures, two implementation manners are provided. When the integral connection mode of the sleeve and the shaft body is adopted, the crankshaft structure is as Figure 1 shown. In this embodiment, the structure arranged on the outer circumferential surface of the sleeve is selected as external drum-shaped teeth; when the split connection mode of the sleeve and the shaft body is adopted, the power connection end structure is as Figure 5 shown. At this time, the sleeve is fixed at the (outer) end of the flange and protrudes outward, so that the output end of the reduction gearbox can be smoothly connected with the external drum-shaped teeth / external splines on the outer circumferential surface of the sleeve.

[0045] In another technical solution, for the mud pump crankshaft, internal involute splines or internal rectangular splines are continuously arranged on the inner circumferential surface of the sleeve 1-1-1.

[0046] For the above setting forms of the drum-shaped teeth or spline structures, two implementation manners are provided. When the integral connection mode of the sleeve and the shaft body is adopted, the crankshaft structure is as Figure 2 shown. In this embodiment, the structure arranged on the inner circumferential surface of the sleeve is selected as internal involute splines; when the split connection mode of the sleeve and the shaft body is adopted, the crankshaft structure is as Figure 3 shown, and the power connection end structure is as Figure 4 shown. At this time, the sleeve is fitted and sleeved inside the flange, that is, the outer circumferential surface of the sleeve is fixedly sleeved in cooperation with the inner side wall of the flange, and the output end (shaft) of the reduction gearbox extends into the sleeve, and the cooperative drive connection can be realized through the internal splines.

[0047] Although the implementation schemes of the present invention are disclosed as above, they are not limited to only the applications listed in the description and implementation manners. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily achieved. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A mud pump crankshaft, characterized in that, include: Axis; Crankshaft supports and connecting rod connecting plates are arranged on the shaft body at intervals along the length direction and are integrally formed therewith. The crankshaft supports are configured to be fitted with rolling bearings in the bearing seat holes of the mud pump frame, and the connecting rod connecting plates are configured to be drivingly connected to the connecting rods of the mud pumps. The power connection end is fixedly arranged at the end of the shaft body, and the power connection end is transmission-connected to the output end of the reduction box through a drum-shaped tooth or a spline structure.

2. The mud pump crankshaft according to claim 1, wherein, The crankshaft support includes a plurality of support seats, which are arranged on the shaft body at intervals, and any support seat is a cylindrical structure coaxially arranged with the shaft body.

3. The mud pump crankshaft according to claim 1, wherein The connecting rod connecting disk includes at least three connecting rod connecting disks, which are arranged on the shaft body at intervals. Any connecting rod connecting disk is a disc structure, which is coaxial or non-coaxial with the shaft body.

4. The mud pump crankshaft according to claim 1, wherein, When there is one power connection end, it is located at either end of the shaft; when there are two power connection ends, they are respectively located at both ends of the shaft.

5. The mud pump crankshaft according to claim 1, wherein, The power connection end includes a sleeve, which is integrally connected to the shaft and fixed at its end. The sleeve is transmission-connected to the output end of the reduction gearbox via a drum-shaped tooth or a spline structure.

6. The mud pump crankshaft according to claim 1, characterized in that, The power connection end includes a sleeve, which is detachably connected to the end of the shaft body through a flange, and the sleeve is transmission-connected to the output end of the reduction box through a drum-shaped tooth or a spline structure.

7. The mud pump crankshaft according to claim 5 or 6, characterized in that, The outer circumferential surface of the sleeve is continuously provided with external drum-shaped teeth or external involute splines or external rectangular splines along the circumferential direction.

8. The mud pump crankshaft according to claim 5 or 6, characterized in that, The inner circumferential surface of the sleeve is continuously provided with inner involute splines or inner rectangular splines along the circumferential direction.

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