A connection structure for a direct drive motor in petroleum equipment

Abstract

This utility model discloses a connection structure for a direct-drive motor in petroleum equipment, relating to the field of direct-drive motor technology. It includes a connecting body, inside which a mud pump shaft is housed. A bushing is fitted onto the outer surface of the mud pump shaft. A ball cage universal coupling is connected to one side of the bushing. A tapered connecting assembly is located on one side of the ball cage universal coupling. The tapered connecting assembly includes a tapered connecting end on one side of the ball cage universal coupling, and an annular buffer sleeve on the outer side of the tapered connecting end. Evenly distributed ball grooves are provided on the contact surface between the annular buffer sleeve and the tapered connecting end, with balls installed inside the ball grooves. This utility model, by incorporating a mud pump shaft, bushing, ball cage universal coupling, and tapered connecting assembly within the connecting body, solves the problems of difficulty in compensating for coaxiality errors, inability to adapt to displacement and deviation leading to stress concentration, easy component damage, and insufficient stability and adaptability of the connection structure during the connection process of a direct-drive motor in petroleum equipment.

Description

Technical Field

[0001] This utility model relates to the field of direct drive motor technology, specifically a connection structure for a direct drive motor in petroleum equipment. Background Technology

[0002] The connection structure of the direct drive motor for oil equipment securely and precisely connects the direct drive motor to the oil equipment, ensuring that the motor can efficiently and stably transmit power to the equipment, while withstanding various forces and torques generated during motor operation, reducing the transmission of vibration and noise, and adapting to the operating requirements of the oil equipment under different working conditions, thus ensuring the reliable operation of the entire oil equipment system.

[0003] Patent document CN221978736U discloses a connection structure for direct drive between a gearbox and a motor. This document mainly considers how to use the existing structure of the gearbox to directly drive the motor. However, it does not consider the problems of difficulty in compensating for coaxiality errors, inability to adapt to stress concentration caused by displacement and deviation, easy damage to components, and insufficient stability and adaptability of the connection structure during the direct drive motor connection process in oil equipment. Utility Model Content

[0004] The purpose of this utility model is to provide a connection structure for a direct-drive motor in petroleum equipment, in order to solve the problems mentioned in the background art, such as difficulty in compensating for coaxiality errors, inability to adapt to displacement and deviation leading to stress concentration, easy damage to components, and insufficient stability and adaptability of the connection structure during the connection process of a direct-drive motor in petroleum equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a connection structure for a direct-drive motor of petroleum equipment, comprising a connection body, a mud pump shaft being disposed inside the connection body, a bushing being fitted onto the outer surface of the mud pump shaft, a ball cage universal coupling being connected to one side of the bushing via a coupling flange plane key, and a tapered connection assembly being disposed on one side of the ball cage universal coupling, the tapered connection assembly being used to compensate for coaxiality errors during the connection process and axial, radial displacements and angular deviations caused by load changes during operation;

[0006] The tapered connection assembly includes a tapered connection end located on one side of the ball cage universal coupling. An annular buffer sleeve is provided on the outer side of the tapered connection end. Evenly distributed ball grooves are provided on the contact surface between the annular buffer sleeve and the tapered connection end, and balls are installed inside the ball grooves.

[0007] Preferably, an annular sealing ring is provided between the annular buffer sleeve and the conical connecting end, the annular sealing ring being used to prevent external impurities from entering the interior of the connecting structure.

[0008] Preferably, one side of the annular sealing ring is connected to a connecting disc via a coupling flange plane key.

[0009] Preferably, an annular hydraulic chamber is provided between the mud pump shaft and the bushing, and a hydraulic damping component is provided inside the annular hydraulic chamber to dampen and support the mud pump shaft.

[0010] Preferably, the hydraulic damping assembly includes a metal support layer disposed inside an annular hydraulic chamber, the metal support layer having a porous elastic material layer disposed inside, and the porous elastic material layer being filled with hydraulic oil.

[0011] Preferably, the porous elastic material layer has a wear-resistant alloy layer inside, and the wear-resistant alloy layer is in contact with the mud pump shaft.

[0012] Preferably, the interior of the metal support layer is provided with uniformly arranged oil channels, which are connected to the annular hydraulic chamber.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model incorporates a mud pump shaft, bushing, ball cage universal coupling, and tapered connecting assembly within the connecting body. The tapered connecting end and the annular buffer sleeve are connected by ball grooves and balls, forming a freely sliding dynamic connection interface. When axial, radial, or angular displacements occur during equipment operation, the balls can roll flexibly within the ball grooves, adjusting the relative positions of the connecting components in real time and controlling the error within a minimal range. This structure not only effectively compensates for coaxiality errors during the connection process but also actively adapts to displacements and deviations when the load changes drastically, avoiding stress concentration and component damage caused by rigid connections. This significantly enhances the stability and adaptability of the direct-drive motor connection structure for petroleum equipment. Therefore, it can solve the problems of difficulty in compensating for coaxiality errors, inability to adapt to displacements and deviations, stress concentration, easy component damage, and insufficient stability and adaptability of the connection structure during the connection process of direct-drive motors in petroleum equipment.

[0015] 2. This utility model achieves vibration damping and support for the mud pump shaft by setting an annular hydraulic cavity between the mud pump shaft and the bushing, and installing a hydraulic damping component containing a metal support layer and a porous elastic material layer inside the cavity. The porous elastic material layer inside the metal support layer is filled with hydraulic oil, forming a fluid and elastic composite damping system. When the mud pump shaft vibrates, the vibration energy is first transferred to the wear-resistant alloy layer, which then transfers the vibration to the porous elastic material layer. The porous elastic material layer undergoes elastic deformation, absorbing part of the vibration energy. Simultaneously, the hydraulic oil flows through the oil passage and... The circulating flow within the annular hydraulic chamber utilizes fluid damping characteristics to dissipate a large amount of vibration energy, further reducing the vibration amplitude. This dual damping mechanism, compared to traditional rigid support structures, can significantly reduce the vibration of the mud pump shaft, making operation smoother. In addition, the wear-resistant alloy layer contacts the mud pump shaft, reducing frictional loss and wear, thereby effectively extending the service life of the mud pump shaft and related components. Therefore, it can solve the problems of large vibration amplitude during mud pump shaft operation, poor damping effect of traditional rigid support structures, and short service life of mud pump shafts due to high frictional loss. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a side view of the present invention.

[0018] Figure 3 This is a cross-sectional structural diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the tapered connecting component structure of this utility model;

[0020] Figure 5 This is a schematic diagram of the hydraulic shock absorption component of this utility model.

[0021] In the diagram: 1. Mud pump shaft; 2. Shaft sleeve; 3. Ball cage universal coupling; 4. Tapered connecting end; 5. Annular buffer sleeve; 6. Ball groove; 7. Ball; 8. Annular seal ring; 9. Connecting disc; 10. Annular hydraulic chamber; 11. Metal support layer; 12. Porous elastic material layer; 13. Wear-resistant alloy layer; 14. Oil passage; 15. Connecting body. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides an embodiment of a connection structure for a direct drive motor of an oil equipment, comprising a connection body 15, a mud pump shaft 1 disposed inside the connection body 15, a bushing 2 sleeved on the outer surface of the mud pump shaft 1, a ball cage universal coupling 3 connected to one side of the bushing 2 via a coupling flange plane key, and a tapered connection assembly disposed on one side of the ball cage universal coupling 3, the tapered connection assembly being used to compensate for coaxiality errors during the connection process and axial, radial displacements and angular deviations caused by load changes during operation;

[0025] The tapered connection assembly includes a tapered connection end 4 disposed on one side of the ball cage universal coupling 3. An annular buffer sleeve 5 is disposed on the outer side of the tapered connection end 4. Evenly arranged ball grooves 6 are disposed on the contact surface between the annular buffer sleeve 5 and the tapered connection end 4. Balls 7 are installed inside the ball grooves 6.

[0026] An annular sealing ring 8 is provided between the annular buffer sleeve 5 and the conical connecting end 4. The annular sealing ring 8 is used to prevent external impurities from entering the interior of the connecting structure.

[0027] One side of the annular sealing ring 8 is connected to the connecting disc 9 via a coupling flange face key.

[0028] Furthermore, the direct drive motor connection structure for petroleum equipment of this utility model takes the connection body 15 as the core carrier and integrates key components such as mud pump shaft 1, bushing 2, ball cage universal coupling 3, tapered connection assembly and annular hydraulic chamber 10. The mud pump shaft 1 serves as the core shaft for power transmission, with the bushing 2 tightly fitted on its outer surface. One side of the bushing 2 is connected to the ball cage universal coupling 3 through the coupling flange plane key, realizing the initial transmission of power and directional adjustment.

[0029] The tapered connection assembly consists of a tapered connection end 4, an annular buffer sleeve 5, ball grooves 6, and balls 7. The tapered connection end 4 is located on one side of the ball cage universal coupling 3, and an annular buffer sleeve 5 is installed on its outer side. Ball grooves 6 are evenly distributed on the contact surface of the two, and balls 7 are installed inside. When axial, radial displacement or angular deviation occurs during the operation of the oil equipment, the balls 7 roll flexibly in the ball grooves 6, adjusting the relative position of the tapered connection end 4 and the annular buffer sleeve 5 in real time, and controlling the error within a very small range. This dynamic connection interface can not only effectively compensate for the coaxiality error during the connection process, but also actively adapt to displacement and deviation when the load changes drastically, avoiding stress concentration and component damage caused by rigid connection, and greatly enhancing the stability and adaptability of the connection structure.

[0030] The annular sealing ring 8 is located between the annular buffer sleeve 5 and the conical connecting end 4. Its main function is to form a tight protective barrier. In the complex working environment of petroleum equipment, the annular sealing ring 8 can effectively prevent external impurities, such as sand and mud, from entering the interior of the connecting structure, avoiding impurities from causing wear or jamming to precision components such as the ball bearing 7 and ball groove 6, and ensuring the normal operation and service life of the conical connecting assembly.

[0031] The connecting disc 9 is connected to one side of the annular sealing ring 8 via a coupling flange key, playing a crucial role in the connection transition. It not only securely connects the annular buffer sleeve 5 to other external equipment but also further outputs the power transmitted by the tapered connection assembly, ensuring the continuity and stability of power transmission throughout the entire connection structure.

[0032] Please see Figure 1 , Figure 2 , Figure 3 and Figure 5 One embodiment of this utility model is a connection structure for a direct drive motor of an oil equipment. An annular hydraulic cavity 10 is provided between the mud pump shaft 1 and the bushing 2. A hydraulic damping component is provided inside the annular hydraulic cavity 10. The hydraulic damping component is used to dampen and support the mud pump shaft 1.

[0033] The hydraulic damping assembly includes a metal support layer 11 disposed inside the annular hydraulic chamber 10, and a porous elastic material layer 12 disposed inside the metal support layer 11, the porous elastic material layer 12 being filled with hydraulic oil.

[0034] The porous elastic material layer 12 has a wear-resistant alloy layer 13 inside, and the wear-resistant alloy layer 13 is in contact with the mud pump shaft 1.

[0035] The interior of the metal support layer 11 is provided with uniformly arranged oil channels 14, which are connected to the annular hydraulic chamber 10.

[0036] Furthermore, a hydraulic damping component is installed inside the annular hydraulic cavity 10 between the mud pump shaft 1 and the bushing 2. The hydraulic damping component consists of a metal support layer 11, a porous elastic material layer 12, a wear-resistant alloy layer 13, and an oil channel 14. The porous elastic material layer 12 in the metal support layer 11 is filled with hydraulic oil to form a fluid and elastic composite damping system.

[0037] When the mud pump shaft 1 vibrates, the vibration energy is first transferred to the wear-resistant alloy layer 13. The wear-resistant alloy layer 13 then transfers the vibration to the porous elastic material layer 12, causing it to undergo elastic deformation and absorb some of the energy. At the same time, the hydraulic oil circulates in the oil channel 14 and the annular hydraulic chamber 10, using the fluid damping characteristics to dissipate a large amount of vibration energy and further reduce the vibration amplitude. In addition, the wear-resistant alloy layer 13 is in contact with the mud pump shaft 1, which can reduce friction loss, reduce the degree of wear, and effectively extend the service life of the mud pump shaft 1 and related components.

[0038] Working principle: When the oil equipment is running, the power is first transmitted to the mud pump shaft 1. As the core shaft for power transmission, the mud pump shaft 1 transmits the power outward. The bushing 2, which is tightly fitted on the outer surface of the mud pump shaft 1, and the ball cage universal coupling 3, which is connected to one side of the bushing 2 through the coupling flange plane key, work together to realize the initial transmission of power from the mud pump shaft 1, and to make initial adjustment of the power transmission direction through the ball cage universal coupling 3.

[0039] The ball cage universal coupling 3 transmits power to the tapered connecting end 4. At this time, the annular buffer sleeve 5 on the outside of the tapered connecting end 4 plays an important role. When axial, radial displacement or angular deviation occurs during equipment operation, the balls 7 in the ball groove 6 on the contact surface of the annular buffer sleeve 5 and the tapered connecting end 4 roll flexibly, adjusting their relative positions in real time and controlling the coaxiality error within a very small range. In this way, the tapered connecting assembly not only ensures smooth power transmission, but also actively adapts to displacement and deviation when the load changes drastically, avoiding stress concentration and component damage caused by rigid connection, and ensuring stable power output to the connecting plate 9. The connecting plate 9 is connected to one side of the annular sealing ring 8 through the coupling flange plane key, firmly receiving the power from the tapered connecting assembly.

[0040] During the power transmission process of the mud pump shaft 1, vibrations will occur. At this time, the annular hydraulic cavity 10 between the mud pump shaft 1 and the bushing 2 and the hydraulic damping components inside it will start to play their role. When the mud pump shaft 1 vibrates, the vibration energy is transmitted to the wear-resistant alloy layer 13 in contact with the mud pump shaft 1. The wear-resistant alloy layer 13 then transmits the vibration to the porous elastic material layer 12. The porous elastic material layer 12 undergoes elastic deformation to absorb part of the energy. At the same time, the hydraulic oil filled in the porous elastic material layer 12 circulates through the oil channels 14 that are evenly arranged inside the metal support layer 11 and connected to the annular hydraulic cavity 10. The fluid damping characteristics are used to dissipate a large amount of vibration energy. The dual mechanism works together to significantly reduce the vibration amplitude of the mud pump shaft 1, making the equipment run more smoothly, while reducing friction loss and extending the service life of the mud pump shaft 1 and related components.

[0041] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A connection structure for a direct-drive motor in petroleum equipment, comprising a connection body (15), characterized in that: The connecting body (15) is provided with a mud pump shaft (1) inside. A bushing (2) is sleeved on the outer surface of the mud pump shaft (1). A ball cage universal coupling (3) is connected to one side of the bushing (2) through a coupling flange plane key. A tapered connection assembly is provided on one side of the ball cage universal coupling (3). The tapered connection assembly is used to compensate for the coaxiality error during the connection process and the axial, radial displacement and angular deviation caused by load changes during operation. The tapered connection assembly includes a tapered connection end (4) located on one side of the ball cage universal coupling (3). An annular buffer sleeve (5) is provided on the outer side of the tapered connection end (4). A ball groove (6) is evenly arranged on the contact surface between the annular buffer sleeve (5) and the tapered connection end (4). Balls (7) are installed inside the ball groove (6).

2. The connection structure of a direct-drive motor for petroleum equipment according to claim 1, characterized in that: An annular sealing ring (8) is provided between the annular buffer sleeve (5) and the conical connecting end (4). The annular sealing ring (8) is used to prevent external impurities from entering the interior of the connecting structure.

3. The connection structure of a direct-drive motor for petroleum equipment according to claim 2, characterized in that: One side of the annular sealing ring (8) is connected to a connecting disc (9) via a coupling flange plane key.

4. The connection structure of a direct-drive motor for petroleum equipment according to claim 1, characterized in that: An annular hydraulic chamber (10) is provided between the mud pump shaft (1) and the bushing (2). A hydraulic damping component is provided inside the annular hydraulic chamber (10) for damping and supporting the mud pump shaft (1).

5. The connection structure of a direct-drive motor for petroleum equipment according to claim 4, characterized in that: The hydraulic damping assembly includes a metal support layer (11) disposed inside an annular hydraulic chamber (10), and a porous elastic material layer (12) disposed inside the metal support layer (11), and the porous elastic material layer (12) is filled with hydraulic oil.

6. The connection structure of a direct-drive motor for petroleum equipment according to claim 5, characterized in that: The porous elastic material layer (12) has a wear-resistant alloy layer (13) inside, and the wear-resistant alloy layer (13) is in contact with the mud pump shaft (1).

7. The connection structure of a direct-drive motor for petroleum equipment according to claim 5, characterized in that: The metal support layer (11) has uniformly arranged oil channels (14) inside, which are connected to the annular hydraulic chamber (10).

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