Low-speed stable rotation type rotor for permanent magnet synchronous motor

Abstract

The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a low-speed stable rotation type rotor for a permanent magnet synchronous motor, which comprises a main body mechanism, an auxiliary mechanism, a heat dissipation mechanism and a functional mechanism, the auxiliary mechanism is positioned on one side of the main body mechanism, the heat dissipation mechanism is positioned inside the main body mechanism, and the functional mechanism is positioned inside the main body mechanism. According to the utility model, through the arc-shaped hole fixedly arranged in the rotor body, certain magnetic isolation and heat dissipation functions can be provided for the motor, the first auxiliary heat dissipation fan and the second auxiliary heat dissipation fan are fixedly arranged on one side of the rotating shaft fixedly arranged on one side of the rotor body, and the rotor body can drive the auxiliary heat dissipation fans to cooperate with the heat dissipation holes to assist heat dissipation when rotating. The magnetism isolating ring fixedly installed in the rotor body plays roles in isolating magnetism and stabilizing the rotor, the motor fixing base is fixedly installed at the bottom end of the permanent magnet synchronous motor shell, and equipment is fixed through a fixing through hole in the motor fixing base.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet synchronous motors, in particular to a low-speed stable rotating rotor for permanent magnet synchronous motors. Background Art

[0002] Magnetic motors have the advantages of low loss and high efficiency. Today, as energy conservation and environmental protection are increasingly valued, they are used more and more widely. For example, in applications such as fans, pumps, compressors, etc. that run continuously, at a constant speed and in a single direction, ordinary asynchronous motors waste electricity due to efficiency, power factor, etc., and are gradually being replaced by permanent magnet motors. At the same time, many industrial machines need to set and adjust their operating speeds at will, but the speed control accuracy requirements are not high. Permanent magnet synchronous motors are gradually becoming the main products in this occasion due to their small size, high efficiency and energy saving.

[0003] As disclosed in the authorization announcement number CN105141058A, a permanent magnet synchronous motor rotor and a permanent magnet synchronous motor are disclosed, wherein the permanent magnet synchronous motor rotor comprises: a rotor core and a magnetic circuit assembly, wherein the magnetic circuit assembly comprises two tangential permanent magnets distributed radially, the tangential permanent magnets are arranged in permanent magnet slots, the same polarities of the two tangential permanent magnets are opposite, a radial permanent magnet is arranged between the two tangential permanent magnets and at one end close to the inner side of the rotor core, the side of the radial permanent magnet facing the stator has the same polarity as the opposite side of the two tangential permanent magnets, and the radial cross-sectional shape of the rotor core is composed of arcs and straight lines, wherein the part close to the tangential permanent magnet is a straight line. The permanent magnet synchronous motor rotor and permanent magnet synchronous motor provided by the present invention have a rotor core whose radial cross-section shape is not a perfect circle but is composed of arcs and straight lines, resulting in an uneven air gap structure of the rotor, thereby optimizing the air gap magnetic field waveform to make it close to a sinusoidal distribution and improving the performance of the permanent magnet synchronous motor. However, during use, it has poor heat dissipation efficiency and high manufacturing cost. For this reason, we propose a low-speed stable rotation rotor for a permanent magnet synchronous motor to solve the problems of poor heat dissipation efficiency and high manufacturing cost of traditional equipment. Utility Model Content

[0004] The utility model aims to provide a low-speed stable rotating rotor for a permanent magnet synchronous motor to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A low-speed stable rotating rotor for a permanent magnet synchronous motor comprises a main mechanism, an auxiliary mechanism, a heat dissipation mechanism, and a functional mechanism, wherein the auxiliary mechanism is located at one side of the main mechanism, the heat dissipation mechanism is located inside the main mechanism, and the functional mechanism is located inside the main mechanism. The main mechanism comprises a permanent magnet synchronous motor housing, a motor fixed base, and a fixed through hole, wherein the permanent magnet synchronous motor housing is fixedly mounted on the top of the motor fixed base, the motor fixed base is fixedly mounted on the bottom of the permanent magnet synchronous motor housing, and the fixed through hole is opened inside the motor fixed base.

[0007] Preferably, the auxiliary mechanism includes a rotor cover plate, a bearing seal ring, and an auxiliary bearing. The rotor cover plate is fixedly mounted on one side of the front end cover plate, the bearing seal ring is fixedly mounted on one side of the auxiliary bearing, and the auxiliary bearing is fixedly mounted inside the rotor cover plate.

[0008] Preferably, the heat dissipation mechanism includes a first rotating shaft, a second rotating shaft, a first auxiliary heat dissipation fan, a second auxiliary heat dissipation fan, an arc hole, a heat dissipation hole, and a rotor body. The first rotating shaft is fixedly installed on one side of the rotor body, the second rotating shaft is fixedly installed on one side of the rotor body, and the first auxiliary heat dissipation fan is fixedly installed on one side of the first rotating shaft.

[0009] Preferably, the functional mechanism includes squirrel cage bars, bar permanent magnets, magnetic isolation rings, motor shaft holes, rotating shafts, front cover plates, and rear cover plates, the squirrel cage bars are fixedly mounted inside the rotor body, and the bar permanent magnets are fixedly mounted inside the rotor body.

[0010] Preferably, the second auxiliary cooling fan is fixedly mounted on one side of the second rotating shaft, the arc-shaped hole is opened inside the rotor body, the cooling hole is opened on one side of the permanent magnet synchronous motor casing, and the rotor body is fixedly mounted inside the permanent magnet synchronous motor casing.

[0011] Preferably, the magnetic isolation ring is fixedly installed inside the rotor body, the motor shaft hole is opened inside the rotor body, the rotating shaft is fixedly installed inside the motor shaft hole, the front end cover plate is fixedly installed on one side of the permanent magnet synchronous motor housing, and the rear end cover plate is fixedly installed on one side of the permanent magnet synchronous motor housing.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. This kind of permanent magnet synchronous motor uses a low-speed stable rotating rotor, which can provide certain magnetic isolation and heat dissipation functions for the motor by fixing an arc hole inside the rotor body. A rotating shaft fixedly installed on one side of the rotor body has a first auxiliary heat dissipation fan and a second auxiliary heat dissipation fan fixedly installed on one side. When the rotor body rotates, it will drive the auxiliary heat dissipation fan to cooperate with the heat dissipation holes to assist in heat dissipation. The magnetic isolation ring fixedly installed inside the rotor body plays the role of magnetic isolation and stabilizing the rotor.

[0014] 2. A permanent magnet synchronous motor uses a low-speed stable rotating rotor. A motor fixing base is fixedly installed at the bottom end of the permanent magnet synchronous motor housing, and the device is fixed through a fixing through hole inside the motor fixing base. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 It is an enlarged schematic diagram of the A part of the utility model;

[0018] Figure 4 It is an enlarged schematic diagram of point B of the present utility model.

[0019] In the figure: 100, permanent magnet synchronous motor housing; 101, motor fixing base; 102, fixing through hole; 200, rotor cover; 201, bearing sealing ring; 202, auxiliary bearing; 300, first rotating shaft; 301, second rotating shaft; 302, first auxiliary cooling fan; 303, second auxiliary cooling fan; 304, arc hole; 305, cooling hole; 306, rotor body; 400, squirrel cage bar; 401, bar permanent magnet; 402, magnetic isolation ring; 403, motor shaft hole; 404, rotating shaft; 405, front cover; 406, rear cover. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0022] A low-speed stable rotation rotor for a permanent magnet synchronous motor comprises a main mechanism, an auxiliary mechanism, a heat dissipation mechanism, and a functional mechanism. The auxiliary mechanism is located at one side of the main mechanism, the heat dissipation mechanism is located inside the main mechanism, and the functional mechanism is located inside the main mechanism. The main mechanism comprises a permanent magnet synchronous motor housing 100, a motor fixed base 101, and a fixed through hole 102. The permanent magnet synchronous motor housing 100 is fixedly mounted on the top of the motor fixed base 101, the motor fixed base 101 is fixedly mounted on the bottom of the permanent magnet synchronous motor housing 100, and the fixed through hole 102 is opened inside the motor fixed base 101.

[0023] In this example, preferably, the auxiliary mechanism includes a rotor cover plate 200, a bearing sealing ring 201, and an auxiliary bearing 202. The rotor cover plate 200 is fixedly mounted on one side of the front end cover plate 405, the bearing sealing ring 201 is fixedly mounted on one side of the auxiliary bearing 202, and the auxiliary bearing 202 is fixedly mounted inside the rotor cover plate 200.

[0024] In this example, preferably, the heat dissipation mechanism includes a first rotating shaft 300, a second rotating shaft 301, a first auxiliary heat dissipation fan 302, a second auxiliary heat dissipation fan 303, an arc hole 304, a heat dissipation hole 305, and a rotor body 306, wherein the first rotating shaft 300 is fixedly mounted on one side of the rotor body 306, the second rotating shaft 301 is fixedly mounted on one side of the rotor body 306, and the first auxiliary heat dissipation fan 302 is fixedly mounted on one side of the first rotating shaft 300.

[0025] In this example, preferably, the functional mechanism includes a squirrel cage bar 400, a bar permanent magnet 401, a magnetic isolation ring 402, a motor shaft hole 403, a rotating shaft 404, a front cover plate 405, and a rear cover plate 406, the squirrel cage bar 400 is fixedly installed inside the rotor body 306, and the bar permanent magnet 401 is fixedly installed inside the rotor body 306.

[0026] In this example, preferably, the second auxiliary cooling fan 303 is fixedly mounted on one side of the second rotating shaft 301, the arc hole 304 is opened inside the rotor body 306, the cooling hole 305 is opened on one side of the permanent magnet synchronous motor housing 100, and the rotor body 306 is fixedly mounted inside the permanent magnet synchronous motor housing 100.

[0027] In this example, preferably, the magnetic isolation ring 402 is fixedly installed inside the rotor body 306, the motor shaft hole 403 is opened inside the rotor body 306, the rotating shaft 404 is fixedly installed inside the motor shaft hole 403, the front end cover plate 405 is fixedly installed on one side of the permanent magnet synchronous motor housing 100, and the rear end cover plate 406 is fixedly installed on one side of the permanent magnet synchronous motor housing 100.

[0028] When in use, a low-speed stable rotating rotor for a permanent magnet synchronous motor of the present embodiment can provide the motor with certain magnetic isolation and heat dissipation functions by means of an arc-shaped hole 304 fixedly provided inside the rotor body 306. A first auxiliary heat dissipation fan 302 and a second auxiliary heat dissipation fan 303 are fixedly installed on one side of a rotating shaft fixedly installed on one side of the rotor body 306. When the rotor body 306 rotates, the auxiliary heat dissipation fans will be driven to cooperate with the heat dissipation holes 305 to assist in heat dissipation. A magnetic isolation ring 402 fixedly installed inside the rotor body 306 plays a role in magnetic isolation and stabilizing the rotor.

[0029] A motor fixing base 101 is fixedly mounted on the bottom end of the permanent magnet synchronous motor housing 100 , and the device is fixed through a fixing through hole 102 inside the motor fixing base 101 .

[0030] The above shows and describes the basic principle, main features and 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 preferred examples of the utility model and are not used to limit 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 of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low-speed stable rotation type rotor for a permanent magnet synchronous motor, comprising a main mechanism, an auxiliary mechanism, a heat dissipation mechanism, and a functional mechanism, characterized in that: The auxiliary mechanism is located on one side of the main mechanism, the heat dissipation mechanism is located inside the main mechanism, and the functional mechanism is located inside the main mechanism. The main mechanism comprises a permanent magnet synchronous motor housing (100), a motor fixing base (101), and a fixing through hole (102). The permanent magnet synchronous motor housing (100) is fixedly mounted on the top of the motor fixing base (101), the motor fixing base (101) is fixedly mounted on the bottom of the permanent magnet synchronous motor housing (100), and the fixing through hole (102) is provided inside the motor fixing base (101).

2. The low-speed stable rotation type rotor for a permanent magnet synchronous motor according to claim 1, characterized in that: The auxiliary mechanism comprises a rotor cover plate (200), a bearing seal ring (201), and an auxiliary bearing (202); the rotor cover plate (200) is fixedly mounted on one side of a front end cover plate (405); the bearing seal ring (201) is fixedly mounted on one side of the auxiliary bearing (202); and the auxiliary bearing (202) is fixedly mounted inside the rotor cover plate (200).

3. The low-speed stable rotation type rotor for a permanent magnet synchronous motor according to claim 1, characterized in that: The heat dissipation mechanism comprises a first rotating shaft (300), a second rotating shaft (301), a first auxiliary heat dissipation fan (302), a second auxiliary heat dissipation fan (303), an arc-shaped hole (304), a heat dissipation hole (305), and a rotor body (306); the first rotating shaft (300) is fixedly mounted on one side of the rotor body (306), the second rotating shaft (301) is fixedly mounted on one side of the rotor body (306), and the first auxiliary heat dissipation fan (302) is fixedly mounted on one side of the first rotating shaft (300).

4. The low-speed stable rotation type rotor for a permanent magnet synchronous motor according to claim 1, characterized in that: The functional mechanism comprises a squirrel cage bar (400), a bar-shaped permanent magnet (401), a magnetic isolation ring (402), a motor shaft hole (403), a rotating shaft (404), a front end cover plate (405), and a rear end cover plate (406); the squirrel cage bar (400) is fixedly mounted inside a rotor body (306); and the bar-shaped permanent magnet (401) is fixedly mounted inside a rotor body (306).

5. The low-speed stable rotation type rotor for a permanent magnet synchronous motor according to claim 3, characterized in that: The second auxiliary heat dissipation fan (303) is fixedly mounted on one side of the second rotating shaft (301), the arc-shaped hole (304) is provided inside the rotor body (306), the heat dissipation hole (305) is provided on one side of the permanent magnet synchronous motor housing (100), and the rotor body (306) is fixedly mounted inside the permanent magnet synchronous motor housing (100).

6. The low-speed stable rotation type rotor for a permanent magnet synchronous motor according to claim 4, characterized in that: The magnetic isolation ring (402) is fixedly mounted inside the rotor body (306), the motor shaft hole (403) is opened inside the rotor body (306), the rotating shaft (404) is fixedly mounted inside the motor shaft hole (403), the front end cover plate (405) is fixedly mounted on one side of the permanent magnet synchronous motor housing (100), and the rear end cover plate (406) is fixedly mounted on one side of the permanent magnet synchronous motor housing (100).

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