Permanent magnet speed reduction all-in-one machine

Abstract

A permanent magnet speed reduction all-in-one machine belongs to the technical field of speed reducer and motor installation. According to the permanent magnet synchronous motor, the permanent magnet synchronous motor shell is integrally formed outwards on the speed reducer box body, a transition flange part is formed between the speed reducer box body and the permanent magnet synchronous motor shell, and an inner cavity of the transition flange part serves as a bearing installation cavity for supporting a power input shaft of the speed reducer. The end part of the power input shaft of the speed reducer extends into the inner cavity of the permanent magnet synchronous motor shell; and the joint of the inner cavity of the transition flange part and the inner cavity of the permanent magnet synchronous motor shell is sealed through an oil seal and an oil baffle groove. According to the utility model, the permanent magnet direct drive motor and the speed reducer are molded and combined into an all-in-one machine, on one hand, the structure is simple to install, on-site welding work is omitted, the motor and the speed reducer shaft are automatically centered, and the reliability and the service life of equipment are greatly improved; on the other hand, two independent parts of the speed reducer and the permanent magnet motor are combined into a whole, the installation space is saved, and meanwhile the installation difficulty is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of speed reducers and motor installation, in particular to a permanent magnet speed reducer integrated machine. Background Art

[0002] At present, the power transmission of beam pumping units mostly adopts: asynchronous motor-belt drive-reducer-four-bar linkage. The transmission chain of this structure is long, the installation and maintenance costs are high, and each transmission link consumes a certain amount of energy, especially the belt transmission part, which makes the system transmission efficiency low and the energy waste serious. Today, energy conservation and emission reduction are increasingly valued by the whole society. As a large capacity and energy consumer, the oilfield industry urgently needs to propose a new transmission system to solve the installation and efficiency problems.

[0003] In the past two years, a beam pumping unit direct-drive permanent magnet motor has been proposed on the market. This permanent magnet motor directly drives the reducer, eliminating the inefficient belt drive, and making the pumping unit drive chain become: permanent magnet direct-drive motor-reducer-four-bar linkage. Although this method has greatly improved the system transmission efficiency, the permanent magnet motor installation requires on-site welding of a bracket with a suitable height, and the hard connection between the permanent magnet motor and the reducer is prone to wear and even damage to the motor shaft and bearings. Utility Model Content

[0004] In view of the problems existing in the above-mentioned background technology, the utility model proposes a permanent magnet reduction integrated machine with simple system structure, low maintenance rate and obvious energy-saving effect.

[0005] To this end, the utility model adopts the following technical scheme: a permanent magnet reduction integrated machine, including a reduction gear housing, and a reduction gear power input shaft connected to a permanent magnet synchronous motor, characterized in that a permanent magnet synchronous motor housing is integrally formed outwardly on the reduction gear housing, and a transition flange portion is formed between the reduction gear housing and the permanent magnet synchronous motor housing, the inner cavity of the transition flange portion serves as a bearing mounting cavity supporting the reduction gear power input shaft, the end of the reduction gear power input shaft extends into the inner cavity of the permanent magnet synchronous motor housing, and the inner cavity of the transition flange portion and the inner cavity of the permanent magnet synchronous motor housing are sealed at the junction by an oil seal and an oil retaining groove.

[0006] The permanent magnet synchronous motor comprises a stator core, permanent magnets and a rotor core. A positioning and installation position of the stator core is formed on the motor housing. The stator core is pressed into the inner cavity of the permanent magnet synchronous motor housing and forms the stator part of an integrated motor component. The rotor core with permanent magnets installed is fitted on the power input shaft of the reducer, and the rotor core is fixed axially on the power input shaft.

[0007] The inner cavity of the permanent magnet synchronous motor housing has a concentric cavity that is concentric with the power input shaft of the reducer. The outer edge of the stator part is pressed into the concentric cavity to ensure that the reducer shaft and the motor are concentric. The stator part is fastened to the mounting hole on the reducer housing by bolts, and the outer side of the permanent magnet synchronous motor housing is installed and fixed by end covers and end plates to form an integrated structure.

[0008] The utility model can achieve the following beneficial effects: 1. The utility model combines the permanent magnet direct drive motor and the reducer into an integrated machine. On the one hand, this structure is not only simple to install and saves on-site welding work, but also the motor and reducer shafts are automatically aligned, which greatly improves the reliability and life of the equipment; on the other hand, the reducer and the permanent magnet motor combine the two separate components into one, saving installation space and greatly reducing the difficulty of installation. 2. The permanent magnet reducer integrated machine of the utility model is designed on the basis of the original reducer, and does not require major adjustments. It can be directly installed and tested on the equipment, and there is no need to weld the motor mounting bracket on the walking beam pumping unit site, which reduces the workload. 3. The flange part set in the utility model can be tightly matched as the bearing chamber of the reducer housing, which can ensure that the integrated machine housing is concentric when installed in the reducer, greatly reducing the wear of the reducer power input shaft. The oil seal part not only serves as the end cover of the motor component, but also can seal the lubricating oil in the reducer in the reducer housing, which plays a good protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural schematic diagram of an existing reducer.

[0010] Figure 2 This is a structural diagram of a permanent magnet synchronous motor.

[0011] Figure 3 This is a schematic diagram of the reducer housing structure of the utility model.

[0012] Figure 4 This is a schematic diagram of the installation structure of the integrated machine of the utility model.

[0013] Figure 5 It is a schematic diagram of the molding structure of the all-in-one machine of the utility model.

[0014] Figure 6 This is a schematic diagram of the installation structure of the power input shaft of the reducer of the utility model. DETAILED DESCRIPTION

[0015] The specific implementation modes of the present invention are described in detail below in conjunction with the accompanying drawings. The described embodiments are only for illustration and explanation of the present invention and do not constitute the sole limitation of the present invention.

[0016] Figure 1For the original reducer structure, first remove the high-pass cover 2 on the original reducer housing 1, retain the original installation hole position, and integrate the high-pass cover 2 structure with the permanent magnet synchronous motor housing structure to design an integrated housing 4. In addition to serving as the housing of the motor components, the integrated housing 4 then designs a reasonable stator core 6, rotor core 8 and permanent magnet 7 according to the reducer power input shaft 3, as shown in FIG. Figure 2 When installing, first install Figure 3 Then, the rotor core 8 with the permanent magnet 7 is inserted into the power input shaft 3 of the reducer, and the rotor core 8 is fixed axially to the power input shaft 3, as shown in FIG. Figure 4 Finally, the motor end cover 10 and the end plate 9 are installed and fixed to complete the assembly of the integrated machine. Figure 5 The end of the reducer power input shaft 3 extends into the inner cavity of the permanent magnet synchronous motor housing, and the junction between the inner cavity of the transition flange part and the inner cavity of the permanent magnet synchronous motor housing is sealed by an oil seal 11 and an oil retaining groove 12, as shown in FIG. Figure 6 shown.

[0017] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A permanent magnet reduction integrated machine, comprising a reduction gear housing, a reduction gear power input shaft connected to a permanent magnet synchronous motor, characterized in that: A permanent magnet synchronous motor housing is integrally formed outwardly on the reducer housing, and a transition flange portion is formed between the reducer housing and the permanent magnet synchronous motor housing. The inner cavity of the transition flange portion serves as a bearing mounting cavity supporting the power input shaft of the reducer. The end of the power input shaft of the reducer extends into the inner cavity of the permanent magnet synchronous motor housing. The inner cavity of the transition flange portion and the inner cavity of the permanent magnet synchronous motor housing are sealed at the junction by an oil seal and an oil retaining groove.

2. A permanent magnet reduction integrated machine according to claim 1, characterized in that: The permanent magnet synchronous motor comprises a stator core, permanent magnets and a rotor core. The positioning and installation position of the stator core is formed on the motor housing. The stator core is pressed into the inner cavity of the permanent magnet synchronous motor housing and forms the stator part of the integrated motor component. The rotor core with permanent magnets is mounted on the power input shaft of the reducer, and the rotor core is fixed on the power input shaft along the axial direction.

3. A permanent magnet reduction integrated machine according to claim 2, characterized in that: The inner cavity of the permanent magnet synchronous motor housing has a concentric cavity that is concentric with the power input shaft of the reducer. The outer edge of the stator part is pressed into the concentric cavity to ensure that the reducer shaft and the motor are concentric. The stator part is fastened to the mounting hole on the reducer housing by bolts, and the outer side of the permanent magnet synchronous motor housing is installed and fixed by end covers and end plates to form an integrated structure.

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