Drill pump transmission structure with reduction gearbox directly connected with connecting shaft

Abstract

The utility model discloses a drill pump transmission structure with a reduction gearbox directly connected with a connecting shaft. The drill pump transmission structure comprises a drill pump rack, the connecting shaft of a drill pump and the reduction gearbox. The connecting shaft is mounted in the drilling pump rack; the reduction gearbox output shaft / the reduction gearbox output large gear is connected with the input end of the connecting shaft so as to transmit working torque to the connecting shaft, and the reduction gearbox body is fixedly connected with a drilling pump rack or a base so as to provide working reaction torque. The problems that a traditional drilling pump transmission system is low in efficiency and cannot adapt to the high-load working condition are solved.

Description

Technical Field

[0001] The utility model relates to the field of drilling engineering in the petroleum industry. More specifically, the utility model relates to a transmission structure of a drilling pump with a speed reducer directly connected to a connecting shaft. Background Art

[0002] With the development of deep-layer oil and gas, drilling pumps are developing towards high power and large load. The traditional transmission method of drilling pumps is belt drive, which transmits power by friction. When the load is large, the belt is prone to slipping and breaking, and it can no longer adapt to the large-load working conditions of drilling pumps. On the other hand, when the transmission ratio is large, the transmission belt will be subjected to large tension and bending, resulting in increased energy loss and reduced transmission efficiency during the transmission process. For drilling pumps with the same power, a lower transmission ratio determines a larger weight and cost of the motor. Therefore, changing the transmission form of drilling pumps is of great significance for improving the traditional efficiency and reliability of drilling pumps, controlling the weight and cost of the whole machine. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a transmission structure of a drilling pump with a speed reducer directly connected to a connecting shaft, so as to solve the problems of low efficiency of the traditional drilling pump transmission system and inability to adapt to high-load working conditions.

[0004] The technical solution adopted by the utility model to solve this technical problem is: a transmission structure of a drilling pump with a speed reducer directly connected to a connecting shaft, including a drilling pump frame, a connecting shaft of the drilling pump, and a speed reducer; the connecting shaft is installed in the drilling pump frame; the output shaft of the speed reducer / the large output gear of the speed reducer is connected to the input end of the connecting shaft to transmit the working torque to the connecting shaft, and the speed reducer housing is fixedly connected to the drilling pump frame or the base to provide the working reaction torque.

[0005] As a further scheme of the utility model: the output shaft of the speed reducer / the large output gear of the speed reducer has a structure connected to the input end of the connecting shaft of the drilling pump.

[0006] As a further scheme of the utility model: the input end of the connecting shaft of the drilling pump has a structure connected to the output shaft of the speed reducer / the large output gear of the speed reducer.

[0007] As a further scheme of the utility model: the connection between the output shaft of the speed reducer / the large output gear of the speed reducer and the input end of the connecting shaft of the drilling pump is a direct fit. s

[0008] As a further scheme of the utility model: the connection between the output shaft of the speed reducer / the large output gear of the speed reducer and the input end of the connecting shaft of the drilling pump is connected through a transition shaft or a transition sleeve.

[0009] As a further scheme of the utility model: the connecting shaft is a pinion shaft or a crankshaft.

[0010] As a further solution of the present utility model: the connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is through an end face key connection.

[0011] As a further solution of the present utility model: the connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is through a connecting flange connection.

[0012] As a further solution of the present utility model: the connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is through a transmission shaft or a coupling connection.

[0013] As a further solution of the present utility model: the connection between the power output shaft of the reduction gearbox and the input end of the connecting shaft of the drilling pump is through a spline or a crowned gear or a flat key or a connection of the above structures.

[0014] The present utility model at least includes the following beneficial effects:

[0015] The present utility model provides a drilling pump transmission system with a direct connection between the reduction gearbox and the connecting shaft of the drilling pump to solve the problems of low efficiency and inability to adapt to high-load working conditions of the traditional drilling pump transmission system. A drilling pump transmission structure with a direct connection between the reduction gearbox and the connecting shaft includes a drilling pump frame, a drilling pump connecting shaft, and a reduction gearbox. The output end of the reduction gearbox is connected to the drilling pump, directly transmitting power to the drilling pump connecting shaft to realize the operation of the drilling pump.

[0016] 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

[0017] Figure 1 is a schematic structural diagram of the drilling pump transmission structure according to an embodiment of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the drilling pump transmission structure according to another embodiment of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the drilling pump transmission structure according to the third embodiment of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the drilling pump transmission structure according to the fourth embodiment of the present utility model;

[0021] Figure 5 is a schematic structural diagram of the drilling pump transmission structure according to the fifth embodiment of the present utility model;

[0022] Figure 6It is a schematic structural diagram of the drive structure of the drilling pump according to the sixth embodiment of the present utility model;

[0023] Figure 7 It is a schematic structural diagram of the drive structure of the drilling pump according to the seventh embodiment of the present utility model.

[0024] Wherein, 1 - drilling pump frame;

[0025] 2 - connecting shaft; 2-1 - input end of the connecting shaft; 2-1-1 - key of the connecting shaft;

[0026] 3 - reduction gearbox; 3-1 - output shaft of the reduction gearbox; 3-1-1 - key of the output shaft of the reduction gearbox; 3-2 - flange of the reduction gearbox; 3-2-1 - positioning stop of the reduction gearbox; 3-3 - housing of the reduction gearbox;

[0027] 4 - intermediate shaft; 5 - intermediate shaft sleeve; 6 - flat key. Detailed implementation manners

[0028] The present utility model will be described in detail and completely below with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present utility model based on these descriptions. Before describing the present utility model in conjunction with the accompanying drawings, it should be particularly noted that: the technical solutions and technical features provided in each part including the following description in the present utility model can be combined with each other without conflict.

[0029] In addition, the embodiments of the present utility model referred to in the following description are generally only a part of the embodiments of the present utility model, rather than all of the embodiments. Therefore, all other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] The present utility model provides a drive structure of a drilling pump with a direct connection between a reduction gearbox and a connecting shaft, including a drilling pump frame 1, a connecting shaft 2 of the drilling pump, and a reduction gearbox 3; the connecting shaft 2 is installed in the drilling pump frame 1; the output shaft of the reduction gearbox 3 is connected to the input end of the connecting shaft 2 to transmit the working torque to the connecting shaft, and the housing of the reduction gearbox is fixedly connected to the drilling pump frame or the base to provide the working reaction torque. It should be noted that in this embodiment and the following embodiments, the output shaft of the reduction gearbox can also be the large output gear of the reduction gearbox itself.

[0031] Figure 1A specific implementation manner is provided. The connecting shaft 2 of the drilling pump is installed in the drilling pump frame 1, and a rolling bearing is assembled between the two. The connecting shaft 2 can rotate relative to the drilling pump frame 1; the input end 2-1 of the connecting shaft 2 has a connecting shaft key 2-1-1, which is an external key (it can be an external involute spline or an external rectangular spline or an external crowned gear or a flat keyway), and cooperates with the key 3-1-1 (it can be an internal involute spline or an internal rectangular spline or an internal crowned gear or a flat keyway) of the output shaft 3-1 of the reduction gearbox. Through this cooperation, the output shaft 3-1 of the reduction gearbox transmits the working torque to the connecting shaft 2 of the drilling pump; on the output side of the housing of the reduction gearbox 3, there is a reduction gearbox flange 3-2, and there are evenly distributed bolt holes or bolt holes + pin holes on the flange. It is connected to the drilling pump frame through mounting bolts and bolts + positioning pins to provide the working reaction torque. A reduction gearbox positioning stop 3-2-1 is provided on the reduction gearbox flange 3-2, which can cooperate with the positioning stop on the drilling pump frame for positioning.

[0032] Figure 2 Another implementation manner is provided. The difference from the first implementation manner is that the connecting shaft key 2-1-1 at the input end 2-1 of the connecting shaft 2 of the drilling pump is an internal key (it can be an internal involute spline or an internal rectangular spline or an internal crowned gear or a flat keyway), and the key 3-1-1 of the output shaft 3-1 of the reduction gearbox is an external key (it can be an external involute spline or an external rectangular spline or an external crowned gear or a flat keyway). The two cooperate, and the output shaft 3-1 of the reduction gearbox transmits the working torque to the connecting shaft 2 of the drilling pump.

[0033] Figure 3 A third implementation manner is provided. The difference from the first and second implementation manners is that in the first two implementation manners, the input end 2-1 of the connecting shaft and the connecting shaft 2 body are integral, while in the third implementation manner, the input end 2-1 of the connecting shaft and the connecting shaft 2 body are separate. The input end 2-1 of the connecting shaft is a flange with an internal key (it can be an internal involute spline or an internal rectangular spline or an internal crowned gear), and is connected to the connecting shaft body through bolts or bolts + positioning pins. Note: The internal key flange here can also be a flange with an external key, and the output shaft of the reduction gearbox only needs to become a shaft with an internal key.

[0034] Figure 4 A fourth implementation manner is provided. The difference from the previous three implementation manners is that the input end 2-1 of the connecting shaft of the drilling pump and the output shaft 3-1 of the reduction gearbox are not directly connected in cooperation, but are connected through an intermediate shaft 4 between the two. The key 2-1-1 at the input end 2-1 of the connecting shaft of the drilling pump is an internal key (it can be an internal involute spline or an internal rectangular spline or an internal crowned gear or a flat keyway), and the key 3-1-1 of the output shaft 3-1 of the reduction gearbox is an internal key (it can be an internal involute spline or an internal rectangular spline or an internal crowned gear or a flat keyway); both ends of the intermediate shaft 4 are external splines (it can be an external involute spline or an external rectangular spline or an external crowned gear or a flat keyway), and the structures at both ends can be the same or different.

[0035] Similarly, in the fourth embodiment, the transition shaft 4 can also be in the form of a bushing. The two ends of the bushing are internal keys, and the keys 2-1-1 of the connecting shaft input end 2-1 and the keys 3-1-1 of the speed reducer output shaft 3-1 are external keys. Further, one end of the transition shaft can be an external key and the other end can be an internal key, and the forms of the keys 2-1-1 of the connecting shaft input end 2-1 and the keys 3-1-1 of the speed reducer output shaft 3-1 can both be changed.

[0036] Figure 5 Another embodiment is provided. The difference from the previous four embodiments is that the transition shaft 4 and the transition bushing 5 are used simultaneously. The key 3-1-1 of the speed reducer output shaft 3-1 is an internal key, which connects to the external key at one end of the transition shaft 4. The external key at the other end of the transition shaft 4 is connected to the internal key at one end of the transition bushing 5. The other end of the transition bushing 5 is connected to the connecting shaft input end 2-1 of the drilling pump through a flat key 2-1-1 (it can also be connected through a spline or a crowned gear). Through the above series of connections, the speed reducer transmits the working torque to the connecting shaft 2 of the drilling pump.

[0037] Figure 6 Another embodiment is provided. The difference from the previous five embodiments is that the positioning stop 3-2-1 of the speed reducer and the bearing box of the connecting shaft of the drilling pump are integrated. The inner hole of the positioning stop of the speed reducer housing is used to install the bearing of the connecting shaft of the drilling pump, and the outer cylindrical surface of the positioning stop of the speed reducer housing is used to cooperate and position with the inner hole of the bearing seat of the connecting shaft of the drilling pump frame; the speed reducer output shaft 3-1 is the large gear itself (integrated with the large gear); the keys on the inner hole and the outer circle of the transition bushing 5 do not lie at both ends of the bushing respectively, but overlap in the axial range, and the connecting shaft key 2-1-1 is a flat key 6 in this embodiment.

[0038] Figure 7 Another embodiment is provided. The difference from the previous six embodiments is that the speed reducer flange 3-2 is located inside the speed reducer housing, and the speed reducer flange 3-2 is connected to the drilling pump frame 1 through bolts located inside the speed reducer housing.

[0039] In the above various embodiments, the keys on different components can be internal keys or external keys, and the type of the key can be an involute spline or a rectangular spline or a crowned gear or a flat key; the connecting shaft bearing in the drilling pump can be directly installed on the connecting shaft bearing seat integrated with the drilling pump frame, or can be installed in the connecting shaft bearing box. The speed reducer output shaft has two structural forms. One is that the large gear inside the speed reducer and the output shaft are two parts, one end of the output shaft is sleeved with the large gear, and the other end is connected to the pump connecting shaft; the other is that the output shaft and the speed reducer large gear are an integral body and can be directly connected to the pump connecting shaft. Both of these two structural forms can be connected to the connecting shaft through the above embodiments.

[0040] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the description and embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A drive structure of a drilling pump with a speed reducer directly connected to a connecting shaft, characterized in that, It includes a drilling pump frame, a connecting shaft of the drilling pump, and a reduction gearbox; the connecting shaft is installed inside the drilling pump frame; the output shaft of the reduction gearbox / the large output gear of the reduction gearbox is connected to the input end of the connecting shaft to transmit the working torque to the connecting shaft, and the reduction gearbox housing is fixedly connected to the drilling pump frame or the base to provide the working reaction torque.

2. The drive structure of the drilling pump with the speed reducer directly connected to the connecting shaft as described in claim 1, characterized in that, The output shaft of the reduction gearbox / the large output gear of the reduction gearbox has a structure for connecting to the input end of the connecting shaft of the drilling pump.

3. The drive structure of the drilling pump with the speed reducer directly connected to the connecting shaft as claimed in claim 1, wherein The input end of the connecting shaft of the drilling pump has a structure for connecting to the output shaft of the reduction gearbox / the large output gear of the reduction gearbox.

4. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is a direct fit.

5. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is connected through a transition shaft or a transition bushing.

6. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The connecting shaft is a pinion shaft or a crankshaft.

7. The drive structure of the drilling pump with the speed reducer directly connected to the connecting shaft as described in claim 1, characterized in that, The connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is connected through a face key.

8. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is connected through a connecting flange.

9. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The connection between the output shaft of the reduction gearbox / the large output gear of the reduction gearbox and the input end of the connecting shaft of the drilling pump is connected through a transmission shaft or a coupling.

10. The drive structure of the drilling pump with the reduction gearbox directly connected to the connecting shaft as described in claim 1, characterized in that, The power output shaft of the reduction gearbox and the input end of the connecting shaft of the drilling pump are connected through a spline or a crowned gear or a flat key or a connection of the above structures.

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