Driving motor for oil pumping unit in oil field

Abstract

The driving motor comprises a motor and a speed reducer, the motor comprises a machine shell, a stator, a rotor, a main shaft, an upper end cover and a lower end cover, the stator is fixedly arranged on the inner side wall of the machine shell, the rotor is coaxially and rotatably arranged on the inner side of the stator, the main shaft is coaxially arranged on the inner side of the rotor, and the upper end cover and the lower end cover are fixedly arranged on the inner side wall of the machine shell. The upper end cover and the lower end cover are fixedly arranged on the upper side and the lower side of the machine shell respectively, the speed reducer comprises an upper box body, a lower box body, a driving shaft, an output shaft and a gear assembly, the upper box body is fixed to the bottom of the lower end cover, the lower box body is detachably arranged at the bottom of the upper box body, the driving shaft is coaxially connected with the main shaft, and the output shaft is detachably connected with the main shaft. And the output shaft is in transmission connection with the driving shaft through a gear assembly. The speed reducer is driven by the motor to work, the pumping unit is driven by the output shaft to work, and the motor and the speed reducer are directly connected, so that the structure is more compact and efficient, the size of the whole machine is obviously reduced, and the installation space is saved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a drive motor for oilfield pumping units. Background Technology

[0002] A pumping unit is a machine used for extracting oil, commonly known as a "nodding donkey." The working principle of a pumping unit is as follows: power is supplied by an electric motor, which is reduced from high-speed rotation to low-speed rotation of the pumping unit crank via a reducer. The crank-connecting rod-walking beam mechanism then converts the rotational motion into the up-and-down reciprocating motion of the pumping unit's pump head, which in turn drives the deep well pump via the suspension rope assembly.

[0003] Existing pumping unit motors and reducers are separate structures, requiring connection during use. For example, the direct-drive reduction device and reduction method for pumping unit motors disclosed in patent CN120110081A connects the motor and reducer via a coupling assembly. Furthermore, this reduction device has a complex structure and large size, thus occupying more installation space.

[0004] Therefore, the existing pumping unit drive motor structure has certain shortcomings in terms of both installation convenience and structural compactness, and still needs to be improved. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model discloses a drive motor for an oilfield pumping unit, including a motor and a reducer. The reducer is directly connected to the bottom of the motor. The motor includes a housing, a stator, a rotor, a main shaft, an upper end cover, and a lower end cover. The stator is fixedly mounted on the inner wall of the housing. The rotor is coaxially and rotatably mounted inside the stator. The main shaft is coaxially mounted inside the rotor. The upper end cover and the lower end cover are respectively fixedly mounted on the upper and lower sides of the housing. The reducer includes an upper housing, a lower housing, a drive shaft, an output shaft, and a gear assembly. The upper housing is fixed to the bottom of the lower end cover. The lower housing is detachably mounted at the bottom of the upper housing. The drive shaft is coaxially connected to the main shaft. The output shaft is driven by the drive shaft through the gear assembly, and one end extends outside the lower housing.

[0006] Furthermore, the gear assembly includes a first gear, a second gear, a third gear, a fourth gear, a first bevel gear, and a second bevel gear. The first gear is coaxially arranged with the drive shaft, the second gear meshes with the first gear on one side, the third gear is coaxially arranged below the second gear, the fourth gear meshes with the third gear on one side, the first bevel gear is coaxially arranged above the fourth gear, and the second bevel gear is coaxially arranged with the output shaft and meshes with the first bevel gear.

[0007] Furthermore, the top wall of the upper housing is provided with a first through hole through which the drive shaft can pass, and the side wall of the lower housing is provided with a second through hole through which the output shaft can pass.

[0008] Furthermore, the inner walls of both the upper and lower housings are provided with multiple grooves for supporting the drive shaft. Bearings are installed in the grooves, and the drive shaft is connected to the grooves through the bearings.

[0009] Furthermore, a number of heat dissipation fins are spaced apart on the circumferential surface of the housing.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention uses a motor to drive a reducer, which in turn drives an oil pumping unit through an output shaft. Because the motor and reducer are directly connected, the structure is more compact and efficient, and the overall size of the machine is significantly reduced, which helps to save installation space. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is an axial structural cross-sectional view of the motor in this utility model;

[0015] Figure 3 This is an exploded view of the inverted structure of the reducer in this utility model.

[0016] Figure label:

[0017] 1-Motor, 11-Housing, 12-Stator, 13-Rotor, 14-Main shaft, 15-Upper end cover, 16-Lower end cover, 17-Heat dissipation fins;

[0018] 2-Reducer, 21-Upper housing, 22-Lower housing, 23-Drive shaft, 24-Output shaft, 25-First gear, 26-Second gear, 27-Third gear, 28-Fourth gear, 29-First bevel gear, 210-Second bevel gear, 211-Transmission shaft, 212-First through hole, 213-Second through hole, 214-Groove, 215-Bearing. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0021] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0022] In the description of the embodiments, unless otherwise explicitly specified and limited, the terms "set," "connect," etc., should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or a connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the drive motor for the oilfield pumping unit in this embodiment includes a motor 1 and a reducer 2, with the reducer 2 directly connected to the bottom of the motor 1.

[0024] like Figure 2 As shown, the motor 1 includes a housing 11, a stator 12, a rotor 13, a main shaft 14, an upper end cover 15, and a lower end cover 16. The stator 12 is fixedly mounted on the inner wall of the housing 11. The rotor 13 is coaxially and rotatably mounted inside the stator 12. The main shaft 14 is coaxially mounted inside the rotor 13. The upper end cover 15 and the lower end cover 16 are respectively fixedly mounted on the upper and lower sides of the housing 11.

[0025] Several heat dissipation fins 17 are spaced apart on the circumferential surface of the casing 11.

[0026] like Figure 3 As shown, the reducer 2 includes an upper housing 21, a lower housing 22, a drive shaft 23, an output shaft 24, and a gear assembly. The upper housing 21 is fixed to the bottom of the lower end cover 16, and the lower housing 22 is detachably mounted on the bottom of the upper housing 21. The drive shaft 23 is coaxially connected to the main shaft 14 (the two can be connected by a coupling). The output shaft 24 is connected to the drive shaft 23 through the gear assembly, and one end extends out of the lower housing 22.

[0027] The gear assembly includes a first gear 25, a second gear 26, a third gear 27, a fourth gear 28, a first bevel gear 29, and a second bevel gear 210. The first gear 25 is coaxially arranged with the drive shaft 24. The second gear 26 meshes with the first gear 25 on one side. The third gear 27 is coaxially arranged below the second gear 26, meaning that both are arranged on the same drive shaft 211. The fourth gear 28 meshes with the third gear 27 on one side.

[0028] The first bevel gear 29 is coaxially mounted on the upper side of the fourth gear 28, and the two are also mounted on the same transmission shaft (not shown in the figure). The second bevel gear 210 is coaxially mounted with the output shaft 24 and meshes with the first bevel gear 29 for transmission. Specifically, the first bevel gear 29 and each gear are mounted horizontally in the upper housing 21 and the lower housing 22, and the second bevel gear 210 is mounted vertically in the upper housing 21 and the lower housing 22.

[0029] The top wall of the upper housing 21 is provided with a first through hole 212 through which the drive shaft 23 can pass, and the side wall of the lower housing 22 is provided with a second through hole 213 through which the output shaft 24 can pass.

[0030] The inner walls of the upper housing 21 and the lower housing 22 are provided with multiple grooves 214 for supporting the drive shaft 211. Bearings 215 are provided in the grooves 214, and the drive shaft 211 is connected to the grooves 214 through the bearings 215.

[0031] Among them, the first gear 25, the second gear 26, the third gear 27, and the fourth gear 28 can be spur gears or helical gears.

[0032] When this utility model is in use, the main shaft 14 of the motor 1 drives the drive shaft 23 to rotate. The drive shaft 23 drives the second gear 26 to rotate through the first gear 25. At the same time, the third gear 27 drives the fourth gear 28 to rotate, and further drives the first bevel gear 29 to rotate. The first bevel gear 29 further drives the second bevel gear 210 and the output shaft 24 to rotate, thereby realizing the drive of the oil pumping unit.

[0033] Because motor 1 and reducer 2 are directly connected and the overall structure is disc-shaped, the structure is more compact and efficient, which significantly reduces the size of the whole machine and helps save installation space.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

Claims

1. A driving motor for oilfield pumping unit, comprising a motor and a reducer, the reducer is directly connected to the bottom of the motor, the motor comprises a casing, a stator, a rotor, a main shaft, an upper end cover and a lower end cover, the stator is fixedly arranged on the inner side wall of the casing, the rotor is coaxially and rotatably arranged in the inner side of the stator, the main shaft is coaxially arranged in the inner side of the rotor, and the upper end cover and the lower end cover are fixedly arranged on the upper and lower sides of the casing respectively, characterized in that: The speed reducer comprises an upper box, a lower box, a driving shaft, an output shaft and a gear assembly, the upper box is fixed at the bottom of a lower end cover, the lower box is detachably arranged at the bottom of the upper box, the driving shaft is coaxially connected with a main shaft, the output shaft is drivingly connected with the driving shaft through the gear assembly and extends out of the lower box at one end.

2. The drive motor for oil field pumping units according to claim 1, characterized in that: The gear assembly comprises a first gear, a second gear, a third gear, a fourth gear, a first bevel gear and a second bevel gear, the first gear is coaxially arranged with the driving shaft, the second gear is drivingly engaged on one side of the first gear, the third gear is coaxially arranged on the lower side of the second gear, the fourth gear is drivingly engaged on one side of the third gear, the first bevel gear is coaxially arranged on the upper side of the fourth gear, and the second bevel gear is coaxially arranged with the output shaft and drivingly engaged with the first bevel gear.

3. The drive motor for oil field pumping units according to claim 2, characterized in that: The top wall of the upper box is provided with a first through hole through which the driving shaft passes, and the side wall of the lower box is provided with a second through hole through which the output shaft passes.

4. The drive motor for oil field pumping units according to claim 2, characterized in that: The inner walls of the upper box and the lower box are each provided with a plurality of recesses for supporting a transmission shaft, bearings are arranged in the recesses, and the transmission shaft is drivingly connected with the recesses through the bearings.

5. The drive motor for oil field pumping units according to claim 1, characterized in that: A plurality of heat dissipation fins are arranged at intervals on the circumferential surface of the shell.

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