Permanent magnet motor shell structure

Abstract

The utility model discloses a permanent magnet motor shell structure which comprises a square shell, a round motor end cover is installed on the front side of the square shell through bolts, a rotating shaft penetrating in the axial direction is arranged in the middle of the motor end cover, corner cavities are formed in the four corners of the square shell respectively, and cover plates are fixedly installed at the ports of the corner cavities through bolts. The outer side face of the cover plate is flush with the side face of the square shell after installation, a power line connector and a signal line connector are installed on the front side of the square shell, a power line wiring terminal and a signal line wiring terminal are installed in the corner cavities respectively, the inner end of the power line connector is electrically connected with the power line wiring terminal, and the outer end of the signal line connector is electrically connected with the signal line wiring terminal. And the inner end of the signal line connector is electrically connected with the signal line wiring terminal. The four corners of the square shell are provided with the corner cavities respectively, after wiring is conducted on the motor in the corner cavities and the cover plate is installed and covered, an independent junction box does not need to be arranged, the overall thickness can be reduced, interference with moving parts of the oil pumping unit is prevented, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pumping motors, in particular to a permanent magnet motor housing structure. Background Art

[0002] Oilfields are energy-intensive industries. In the context of achieving carbon peak and carbon neutrality, the oilfield industry's pumping unit lifting systems require product upgrades and energy-saving improvements. This upgrade primarily involves replacing existing pulleys and asynchronous motors with permanent magnet motors, creating a semi-direct drive solution. This delivers high system efficiency and facilitates intelligent control, enabling unmanned and green oilfields. Current semi-direct drive solutions primarily utilize a permanent magnet motor in the place of the pulley, directly connected to the high-speed shaft of the reducer. However, due to the limited space available for the pulley, the motor must be designed to be extremely flat for installation. This presents several challenges. First, the motor is often circular or quasi-circular in design and mounted on a footrest. This results in uneven stress on the housing and can easily cause deformation. Second, a large terminal box is required at the motor end, which consumes the already limited axial space and often interferes with the reducer housing, limiting the motor's installation space. Therefore, a flat motor solution is urgently needed to enhance the housing's structural strength and minimize deformation. Furthermore, the space required to create a terminal box reduces interference with the reducer housing. Utility Model Content

[0003] The purpose of the present utility model is to provide a permanent magnet motor housing structure to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a permanent magnet motor housing structure, comprising a square housing, a circular motor end cover being installed on the front side of the square housing with bolts, an axially penetrating rotating shaft being provided in the middle of the motor end cover, corner chambers being provided at the four corners of the square housing, a cover plate being fixedly installed at the port of the corner chamber with bolts, the outer side of the cover plate being flush with the side of the square housing after installation, a power line connector and a signal line connector being installed on the front side of the square housing, a power line terminal and a signal line terminal being installed in the corner chambers, respectively, the inner end of the power line connector being electrically connected to the power line terminal, and the inner end of the signal line connector being electrically connected to the signal line terminal.

[0005] Preferably, the corner chamber includes two isolated chambers a and chamber b, the power line terminal and the signal line terminal are both located in chamber a, and a lifting ring hole for screwing a lifting ring is provided in chamber b, and the cover plate includes cover plate a and cover plate b, and the cover plate a and cover plate b cover the closed chamber a and chamber b respectively.

[0006] Preferably, the side of the square shell is provided with heat dissipation ribs

[0007] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention respectively sets corner chambers at the four corners of the square shell, and connects the motor in the corner chambers. After the cover is installed, there is no need to set up a separate junction box, which is conducive to reducing the overall thickness, preventing interference with the moving parts of the oil pump, and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 This is a schematic diagram of the explosion structure of Example 1 of the present utility model;

[0009] Figure 2 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model;

[0010] Figure 3 This is a schematic diagram of the three-dimensional structure of the first embodiment of the present utility model;

[0011] Figure 4 This is a schematic diagram of the explosion structure of Example 2 of the present utility model.

[0012] In the figure: 1. Square housing; 2. Motor end cover; 3. Rotating shaft; 4. Cover plate; 41. Cover plate a; 42. Cover plate b; 5. Power line connector; 6. Signal line connector; 7. Power line terminal; 8. Signal line terminal; 9. Eyelet. DETAILED DESCRIPTION

[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0014] For example 1, please refer to Figure 1-3 The utility model provides a technical solution: a permanent magnet motor housing structure, including a square housing 1, the square housing 1 is a flat structure and is used for oil field pumping, the front side of the square housing 1 is bolted with a circular motor end cover 2, the middle part of the motor end cover 2 is provided with an axially penetrating rotating shaft 3, the four corners of the square housing 1 are respectively provided with corner chambers, and the corner chamber ports are fixed with cover plates 4 with bolts. The outer side of the cover plate 4 is flush with the side of the square housing 1 after installation.

[0015] A power line connector 5 and a signal line connector 6 are installed on the front side of the square housing 1. A power line terminal 7 and a signal line terminal 8 are installed in the corner chamber. The inner end of the power line connector 5 is electrically connected to the power line terminal 7, and the inner end of the signal line connector 6 is electrically connected to the signal line terminal 8. The motor and the outside are mainly connected by power lines and signal lines. This solution is to set the connection point in the corner chamber to avoid interference with the rotating parts of the pumping unit. The corner chamber includes two isolated chambers a and chamber b. The power line terminal 7 and the signal line terminal 8 are both located in chamber a. A lifting eye hole 9 for screwing a lifting eye is provided in chamber b. The cover plate 4 includes a cover plate a41 and a cover plate b42. The cover plates a41 and b42 cover and enclose chambers a and b respectively. After installation, the cover plate 4 is a square shape with no exposed wiring.

[0016] Example 2, see Figure 4 The difference from the first embodiment is that the cover plate 4 is an integral plate, and heat dissipation ribs are provided on the side of the square shell 1.

[0017] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A permanent magnet motor housing structure, comprising a square housing (1), a circular motor end cover (2) being bolted to the front side of the square housing (1), and a rotating shaft (3) being axially passed through the middle of the motor end cover (2), characterized in that: The four corners of the square shell (1) are respectively provided with corner chambers, and a cover plate (4) is fixedly installed at the port of the corner chamber with bolts. The outer side of the cover plate (4) is flush with the side of the square shell (1) after installation. A power line connector (5) and a signal line connector (6) are installed on the front side of the square shell (1). A power line terminal (7) and a signal line terminal (8) are respectively installed in the corner chambers. The inner end of the power line connector (5) is electrically connected to the power line terminal (7), and the inner end of the signal line connector (6) is electrically connected to the signal line terminal (8).

2. A permanent magnet motor housing structure according to claim 1, characterized in that: The corner chamber comprises two mutually isolated chambers a and b, the power line connection terminal (7) and the signal line connection terminal (8) are both located in chamber a, a lifting ring hole (9) for screwing a lifting ring is provided in chamber b, and the cover plate (4) comprises a cover plate a (41) and a cover plate b (42), and the cover plate a (41) and the cover plate b (42) cover and seal the chamber a and chamber b respectively.

3. The permanent magnet motor housing structure according to claim 1, characterized in that: The side surfaces of the square housing (1) are provided with heat dissipation ribs.

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