Slurry pump transmission structure with reduction gearbox directly connected with pinion shaft

Abstract

The invention discloses a slush pump transmission structure with a reduction gearbox and a pinion shaft directly connected. The slush pump transmission structure comprises a slush pump rack, the slush pump pinion shaft and the reduction gearbox. Gear teeth and a pinion shaft support are arranged on the pinion shaft body, the gear teeth are coaxially arranged on the pinion shaft body, and the gear teeth are herringbone teeth, helical teeth or straight teeth; the pinion shaft support is of a cylindrical surface structure coaxial with the central axis of the pinion shaft body; the small gear shaft is installed in the mud pump rack, the input end of the small gear shaft is connected with the reduction gearbox connecting shaft, working torque is transmitted to the small gear shaft through the reduction gearbox, and a reduction gearbox body is fixedly connected with the mud pump rack or the base so as to provide working reaction torque. The problems that a traditional slurry pump transmission system is low in efficiency and cannot adapt to the high-load working condition are solved.

Description

Technical Field

[0001] The present invention relates to the field of oil drilling engineering, and more specifically, to a mud pump transmission structure in which a reduction box is directly connected to a pinion shaft. 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 forward higher requirements on the adaptability and reliability of mud pumps.

[0003] Traditional mud pumps mostly use motors to transmit power to the small gear shaft of the mud pump through belt drive or chain drive. The belt and chain transmission efficiency is low, and when used under high load conditions, the belt is prone to slippage and breakage, which cannot adapt to the current development trend of high power and high load of mud pumps. It is of great significance to improve the transmission efficiency and load-bearing capacity of mud pumps by changing the transmission form. Summary of the invention

[0004] The purpose of the present invention is to provide a mud pump transmission structure in which a reduction box is directly connected to a pinion shaft, so as to solve the problem that the traditional mud pump transmission system has low efficiency and cannot adapt to high load conditions.

[0005] The technical solution adopted by the present invention to solve this technical problem is: a mud pump transmission structure in which a reduction box and a pinion shaft are directly connected, comprising a mud pump frame, a mud pump pinion shaft and a reduction box;

[0006] The pinion shaft body is provided with gear teeth and a pinion shaft support, the gear teeth are coaxially arranged on the pinion shaft body, and the gear teeth are herringbone teeth, helical teeth or straight teeth; the pinion shaft support is a cylindrical structure coaxial with the central axis of the pinion shaft body; the pinion shaft is installed in the mud pump frame, the pinion shaft input end is connected to the reduction box connecting shaft, the working torque is transmitted to the pinion shaft through the reduction box, and the reduction box body is fixedly connected to the mud pump frame or base to provide working counter torque.

[0007] As a further solution of the present invention, the reduction box connecting shaft is connected to the input end of the mud pump pinion shaft through a spline, a drum gear, a flat key, an end key, a connecting flange, an expansion sleeve, a coupling or a transmission shaft.

[0008] As a further solution of the present invention, the input end of the pinion shaft has a connection structure connected to the reduction box connecting shaft, and the connection structure is a spline, a drum tooth or a flat key.

[0009] As a further solution of the present invention, a positioning stop and a flange are provided on the output side of the reduction gearbox; a positioning stop is provided on the mud pump frame, and the positioning stop of the reduction gearbox body cooperates with the positioning stop on the mud pump frame for positioning; the flange has evenly distributed bolt holes, and is connected to the mud pump frame by installing bolts.

[0010] As a further solution of the present invention, the connection between the reduction box connecting shaft and the input end of the mud pump pinion shaft is through direct matching connection, or through a transition shaft connection, or through a transition sleeve connection.

[0011] As a further solution of the present invention, the housing of the reduction box has a positioning stop.

[0012] As a further solution of the present invention, the positioning stop can be a basic stop structure, or can be integrated with the mud pump pinion shaft bearing box, and the inner hole of the positioning stop is used for installing the mud pump pinion shaft bearing.

[0013] As a further solution of the present invention, the reduction box connecting shaft is a reduction box output shaft or a reduction box output gearwheel.

[0014] The present invention has at least the following beneficial effects:

[0015] The present invention provides a mud pump transmission system in which a reduction box is directly connected to a pinion shaft, so as to solve the problem that the traditional mud pump transmission system is low in efficiency and cannot adapt to high load conditions. A mud pump transmission structure in which a reduction box is directly connected to a pinion shaft comprises a mud pump frame, a mud pump pinion shaft and a reduction box. The output end of the reduction box is connected to the mud pump, and the power is directly transmitted to the pinion shaft of the mud pump to realize the operation of the mud pump.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of a mud pump transmission structure according to Embodiment 1 of the present invention;

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

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

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

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

[0022] Figure 6 is a structural schematic diagram of a mud pump transmission structure according to a sixth embodiment of the present invention;

[0023] Figure 7 is a structural schematic diagram of a mud pump transmission structure according to a seventh embodiment of the present invention;

[0024] Figure 8 It is a schematic structural diagram of the pinion shaft of the present invention.

[0025] Graphic marking:

[0026] 1—mud pump frame;

[0027] 2—pinion shaft; 2-1—pinion shaft input end; 2-1-1—pinion shaft key; 2-2—pinion shaft support; 2-3—gear teeth;

[0028] 3—reduction box; 3-1—reduction box output shaft; 3-1-1—reduction box output shaft key; 3-2—flange; 3-2-1—positioning stop; 3-3—reduction box housing;

[0029] 4—transition shaft; 5—transition sleeve; 6—flat key. DETAILED DESCRIPTION

[0030] The utility model is described in detail and completely below in conjunction with the accompanying drawings. A person of ordinary skill in the art will be able to implement the utility model based on these descriptions. Before describing the utility model in conjunction with the accompanying drawings, it should be particularly pointed out that the technical solutions and technical features provided in each part of the utility model, including the following description, can be combined with each other without conflict.

[0031] In addition, the embodiments of the present invention involved in the following description are generally only a part of the embodiments of the present invention, rather than all of the embodiments. Therefore, based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] like Figures 1 to 8 As shown, the present invention provides a mud pump transmission structure in which a reduction box and a pinion shaft are directly connected, comprising a mud pump frame, a mud pump pinion shaft and a reduction box;

[0033] like Figure 8As shown, the pinion shaft body is provided with gear teeth 2-3 and a pinion shaft support 2-2, the gear teeth 2-3 are coaxially arranged on the pinion shaft body, and the gear teeth 2-3 are herringbone teeth, helical teeth or straight teeth; the pinion shaft support 2-2 is a cylindrical surface structure coaxial with the central axis of the pinion shaft body; the mud pump pinion shaft is installed in the mud pump frame, the pinion shaft input end is connected to the reduction box connecting shaft, the working torque is transmitted to the pinion shaft through the reduction box, and the reduction box body is fixedly connected to the mud pump frame or base to provide working counter torque. The pinion shaft input end structure can be an external spline, an internal spline, a drum tooth, a flat keyway, an end face keyway, a keyless cylinder, etc.

[0034] Figure 1 A specific implementation is provided. The mud pump pinion shaft 2 is installed in the mud pump frame 1, and a rolling bearing is installed between the two, and the pinion shaft 2 can rotate relative to the mud pump frame 1; the pinion shaft input end 2-1 is provided with a pinion shaft key 2-1-1, and the pinion shaft key is an external key (which can be an external involute spline or an external rectangular spline or an external drum tooth or a flat keyway), and cooperates with the reducer output shaft key 3-1-1 of the reducer output shaft 3-1 (which can be an internal involute spline or an internal rectangular spline or an internal drum tooth or a flat keyway), through which the reducer output shaft 3-1 transmits the working torque to the mud pump pinion shaft 2; the reducer 3 housing output side is provided with a flange 3-2, and the flange is provided with uniformly distributed bolt holes or a combination of bolt holes and pin holes, and is connected to the mud pump frame by installing bolts or bolt combination locating pins to provide working counter torque, and the reducer flange 3-2 is provided with a locating stop 3-2-1 which can cooperate with the locating stop on the mud pump frame for positioning.

[0035] Figure 2 A second embodiment is provided. The difference from the first embodiment is that the pinion shaft key 2-1-1 of the input end 2-1 of the mud pump pinion shaft 2 is an internal key (which can be an internal involute spline or an internal rectangular spline or an internal drum tooth or a flat keyway), and the reduction box output shaft key 3-1-1 of the reduction box output shaft 3-1 is an external key (which can be an external involute spline or an external rectangular spline or an external drum tooth or a flat keyway), and the two cooperate, and the reduction box output shaft 3-1 transmits the working torque to the mud pump pinion shaft 2.

[0036] Figure 3 A third embodiment is provided. The difference from the first and second embodiments is that the pinion shaft input end 2-1 of the first two embodiments is integral with the pinion shaft 2 body, while the pinion shaft input end 2-1 of the third embodiment is integral with the pinion shaft 2 body. Figure 3The pinion shaft input end 2-1 is a flange with an internal key (which can be an internal involute spline, an internal rectangular spline, or an internal drum gear), which is connected to the pinion shaft body by bolts or bolts + locating pins. Note: The internal key flange here can also be a flange with an external key, and the output shaft of the reduction gearbox can be changed to have an internal key.

[0037] Figure 4 A fourth embodiment is provided. The difference from the previous three embodiments is that the mud pump pinion shaft input end 2-1 and the reduction box output shaft 3-1 are not directly matched and connected, but are connected through a transition shaft 4. The pinion shaft key 2-1-1 of the mud pump pinion shaft input end 2-1 is an internal key (can be an internal involute spline or an internal rectangular spline or an internal drum tooth or a flat keyway), and the reduction box output shaft key 3-1-1 of the reduction box output shaft 3-1 is an internal key (can be an internal involute spline or an internal rectangular spline or an internal drum tooth or a flat keyway); both ends of the transition shaft 4 are external splines (can be external involute splines or external rectangular splines or external drum teeth or flat keyways), and the structures at both ends can be the same or different.

[0038] Similarly, in the fourth embodiment, the transition shaft 4 may be in the form of a sleeve, with internal keys at both ends of the sleeve, and the pinion shaft key 2-1-1 of the pinion shaft input end 2-1 and the reducer output shaft key 3-1-1 of the reducer output shaft 3-1 are external keys; further, the transition shaft may have an external key at one end and an internal key at the other end, and the forms of the pinion shaft key 2-1-1 of the pinion shaft input end 2-1 and the reducer output shaft key 3-1-1 of the reducer output shaft 3-1 may be changed.

[0039] Figure 5 A fifth embodiment is provided, which is different from the previous four embodiments in that a transition shaft 4 and a transition sleeve 5 are used at the same time. The output shaft key 3-1-1 of the reduction gearbox output shaft 3-1 is an internal key, connected to an 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 sleeve 5, and the other end of the transition sleeve 5 is connected to the input end 2-1 of the mud pump pinion shaft through the pinion shaft key 2-1-1, and the pinion shaft key 2-1-1 is a flat key (it can also be connected through a spline or a drum gear). Through the above series of connections, the reduction gearbox transmits the working torque to the mud pump pinion shaft 2.

[0040] Figure 6A sixth embodiment is provided, which is different from the previous five embodiments in that the reduction gear box positioning stop 3-2-1 is integrated with the mud pump pinion shaft bearing box, the inner hole is used to install the mud pump pinion shaft bearing, and the outer cylindrical surface is used to cooperate with the inner hole of the pinion shaft bearing seat of the mud pump frame for positioning; the reduction gear box output shaft 3-1 is the large gear itself (integrated with the large gear); the key of the inner hole of the transition sleeve 5 and the key on the outer circle are not located at the two ends of the sleeve respectively, but overlap in the axial range, and the pinion shaft key is a flat key 6 in this embodiment.

[0041] Figure 7 Another embodiment is provided, which is different from the previous six embodiments in that the reduction gear box flange 3-2 is located inside the reduction gear box body, and the reduction gear box flange 3-2 is connected to the mud pump frame 1 by bolts located inside the reduction gear box body.

[0042] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. A mud pump transmission structure in which a reduction box is directly connected to a pinion shaft, characterized in that: It includes a mud pump frame, a mud pump pinion shaft and a reduction box; The pinion shaft body is provided with gear teeth and a pinion shaft support, the gear teeth are coaxially arranged on the pinion shaft body, and the gear teeth are herringbone teeth, helical teeth or straight teeth; the pinion shaft support is a cylindrical structure coaxial with the central axis of the pinion shaft body; the pinion shaft is installed in the mud pump frame, the pinion shaft input end is connected to the reduction box connecting shaft, the working torque is transmitted to the pinion shaft through the reduction box, and the reduction box body is fixedly connected to the mud pump frame or base to provide working counter torque.

2. The mud pump transmission structure with the reduction box and the pinion shaft directly connected as claimed in claim 1 is characterized in that: The reduction box connecting shaft is connected to the input end of the mud pump pinion shaft through a spline, a drum gear, a flat key, an end face key, a connecting flange, an expansion sleeve, a coupling or a transmission shaft.

3. The mud pump transmission structure with the reduction box and the pinion shaft directly connected as claimed in claim 1 is characterized in that: The output side of the reduction gearbox is provided with a positioning stop and a flange; the mud pump frame is provided with a positioning stop, and the positioning stop of the reduction gearbox body cooperates with the positioning stop on the mud pump frame for positioning; the flange is provided with evenly distributed bolt holes, and is connected to the mud pump frame by installing bolts.

4. The mud pump transmission structure with a reduction box and a pinion shaft directly connected as claimed in claim 1, characterized in that: The connection between the reduction box connecting shaft and the input end of the mud pump pinion shaft is through direct matching connection, or through a transition shaft connection, or through a transition sleeve connection.

5. The mud pump transmission structure with the reduction box and the pinion shaft directly connected as claimed in claim 1, characterized in that: The housing of the reduction box has a positioning stop.

6. The mud pump transmission structure with the reduction box and the pinion shaft directly connected as claimed in claim 5, characterized in that: The positioning stop is integrated with the mud pump pinion shaft bearing box, and the inner hole of the positioning stop is used for installing the mud pump pinion shaft bearing.

7. The mud pump transmission structure with a reduction box and a pinion shaft directly connected as claimed in claim 1, characterized in that: The reduction box connecting shaft is the reduction box output shaft or the reduction box output large gear.

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