CN201754548U - Single phase machine with minimum starting torque of high accuracy - Google Patents
Single phase machine with minimum starting torque of high accuracy Download PDFInfo
- Publication number
- CN201754548U CN201754548U CN2010205001135U CN201020500113U CN201754548U CN 201754548 U CN201754548 U CN 201754548U CN 2010205001135 U CN2010205001135 U CN 2010205001135U CN 201020500113 U CN201020500113 U CN 201020500113U CN 201754548 U CN201754548 U CN 201754548U
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- casing
- rotor
- rotating shaft
- centrifugal
- end cap
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Abstract
The utility model provides a single phase machine with a minimum starting torque of high accuracy, belonging to the electric machine technique field, and resolving the technical problem for enhancing the accuracy of the minimum starting torque. The electric machine comprising a casing, a rotor installed in the casing and a centrifugal switch; wherein an end cap is arranged on each of the front and the back ends of the casing, the two ends of the rotating shaft of the rotor is connected with the front and the back ends of the casing by the bearings, a coaxial waveform elastic washer is sleeve on the front end of the rotating shaft of the rotor, the front and the back ends of the waveform elastic washer are respectively abutted against the end cap on the front end of the cabinet and the rotating shaft of the rotor. The electric machine is characterized in that a boss for installing a centrifugal bottom board is arranged on the end cap on the back end of the casing, the centrifugal bottom board of the centrifugal switch is fixed on the boss for installing the centrifugal bottom board on the end cap of the back end of the casing, and the centrifuge of the centrifugal switch is installed on the rotating shaft of the rotor; and the bearing on the back end of the rotating shaft of the rotor is compacted on the end cap on the back end of the casing by a compact block. The utility model provides a electric machine with high yield.
Description
Technical field
The utility model relates to the technology of motor, particularly relates to the technology of the high monophase machine of a kind of minimum starting torque precision.
Background technology
The winding of monophase machine all is made of main winding and auxiliary winding, and main winding spatially becomes 90 electrical degrees relation with auxiliary winding, and string has a centrifugal switch between main winding and the auxiliary winding.When electric motor starting, pass through electric current in main winding and the auxiliary winding, wherein main winding current lags behind auxiliary winding current certain phase angle, thereby generation rotating torques, when the rotating speed of rotor reaches the 75%-80% of rated speed, after this centrifugal switch assists winding no longer charged disconnecting being electrically connected between main winding and the auxiliary winding under the centrifugal intertia force effect, and motor is kept on the go by main winding.
Because when rotating speed of motor reaches the 75%-80% of rated speed, it is centrifugal switch action in the starting process, disconnect being electrically connected between main winding and the auxiliary winding, optimum speed scope when making the pull up torque of motor reach maximum, therefore whether the breaking speed of centrifugal switch is vital accurately, and the installation dimension precision of breaking speed of centrifugal switch and centrifugal switch is relevant, in order to guarantee that centrifugal switch disconnects in the optimum speed scope, the limit deviation of the installation dimension of centrifugal switch need be controlled at ± 0.2mm, when the installation dimension precision of centrifugal switch exceeds the limit deviation of installation dimension, breaking speed of centrifugal switch will depart from the 75%-80% of rated speed, makes that the minimum starting torque of motor is less than normal; Fig. 3 is the T-N(torque-speed relation of centrifugal switch installation dimension motor when bigger than normal) curve chart, Fig. 4 is the T-N(torque-speed relation of centrifugal switch installation dimension motor when less than normal) curve chart, Fig. 5 is the centrifugal switch installation dimension T-N(torque-speed relation of motor just often) curve chart, Fig. 3, axis of ordinates T among Fig. 4 and Fig. 5 is a torque axis, axis of abscissas n is a speed shaft, mark L11 place among Fig. 3, mark L21 place among Fig. 4 and the mark L31 place among Fig. 5 are the centrifugal switch cut-off point, mark L12 place among Fig. 3, mark L22 place among Fig. 4 and the mark L32 place among Fig. 5 are the pull up torque point of motor, from Fig. 3, Fig. 4 is when the centrifugal switch installation dimension is bigger than normal or less than normal as can be seen, breaking speed of centrifugal switch is on the low side or higher, the pull up torque point of motor is then less than normal, when the centrifugal switch installation dimension is accurate as can be seen from Figure 5, breaking speed of centrifugal switch is in the optimum speed scope, and the pull up torque point of motor is just bigger.
As shown in Figure 2, existing monophase machine all is provided with end cap 22 in the rear and front end of its casing 21, each connects the end cap 22 of casing 21 rear and front ends rotating shaft 24 two ends of rotor 23 through a bearing 25, rotating shaft 24 front end sleeves at rotor 23 are provided with the wave spring washer coaxial with it 26, and the rear and front end of this wave spring washer 26 props up the rotating shaft 24 of the end cap 22 and the rotor of casing front end respectively; Be provided with centrifugal base plate installation base on the end cap 22 of casing front end, the centrifugal base plate 27 of centrifugal switch is fixed on the centrifugal base plate installation base of front end housing 22, and the sedimentator 28 of centrifugal switch is installed in the rotating shaft 24 of rotor; Because centrifugal switch and wave spring washer are installed in the same end of motor, and the rotating shaft of rotor is under the elastic force effect of wave spring washer, can be close to towards the rear end of casing, so the length tolerance of casing (0～-0.25mm), tolerance between the two bearings shoulder at rotating shaft two ends (0～-0.25mm), front end housing seam end face to the dimensional tolerance of centrifugal base plate installation base (0～+ 0.13mm), the dimensional tolerance of end cap seam end face at the bottom of the bearing chamber chamber of roller end bearing (0～+ 0.13mm), these tolerances are the installation dimension of cumulative effect centrifugal switch together all, its accumulated value has reached ± 0.38 mm, limit deviation control range ± the 0.2mm that has exceeded the installation dimension of centrifugal switch, make that the minimum starting torque precision of existing monophase machine is lower, thereby influenced the product percent of pass of monophase machine.
The utility model content
At the defective that exists in the above-mentioned prior art, technical problem to be solved in the utility model provides a kind of product percent of pass height, the high monophase machine of minimum starting torque precision.
In order to solve the problems of the technologies described above, the high monophase machine of a kind of minimum starting torque precision provided by the utility model comprises casing, and is installed on rotor, centrifugal switch in the casing;
The rear and front end of described casing respectively is provided with an end cap, each connects the end cap of casing rear and front end the rotating shaft two ends of described rotor through a bearing, and the rotating shaft front end sleeve at rotor is provided with the wave spring washer coaxial with it, and the rear and front end of this wave spring washer props up the rotating shaft of the end cap and the rotor of casing front end respectively;
It is characterized in that: be provided with centrifugal base plate installation base on the end cap of casing rear end, the centrifugal base plate of described centrifugal switch is fixed on the centrifugal base plate installation base of end cap of casing rear end, and the sedimentator of centrifugal switch is installed in the rotating shaft of rotor;
The bearing of the rotating shaft rear end of described rotor is pressed abd fixed on the end cap of casing rear end through a compact heap.
The high monophase machine of minimum starting torque precision that the utility model provides, because centrifugal switch and wave spring washer lay respectively at the rotating shaft two ends of rotor, under the elastic force effect of wave spring washer, rotor can be close to towards the rear end of casing, because the bearing of rotating shaft rear end is fixed by compact heap, therefore influence the dimensional tolerance of the centrifugal base plate installation base of having only of centrifugal switch installation dimension precision at the bottom of the bearing chamber chamber of rotating shaft rear end end bearing, this tolerance is easy to just can be controlled at ± 0.065 mm, limit deviation control range ± 0.2mm much smaller than the centrifugal switch installation dimension, make that minimum starting torque precision of the present utility model is higher, its product percent of pass is also higher.
Description of drawings
Fig. 1 is the structural representation that adopts after the monophase machine biopsy cavity marker devices of method of the embodiment of the invention;
Fig. 2 is the structural representation after the existing monophase machine biopsy cavity marker devices;
Fig. 3 is the T-N curve chart of centrifugal switch installation dimension motor when bigger than normal;
Fig. 4 is the T-N curve chart of centrifugal switch installation dimension motor when less than normal;
Fig. 5 is the centrifugal switch installation dimension T-N curve chart of motor just often.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model is described in further detail, but present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection range of the present utility model in.
As shown in Figure 1, the high monophase machine of a kind of minimum starting torque precision that the utility model embodiment is provided comprises casing 1, and is installed on rotor 3, centrifugal switch in the casing 1;
The rear and front end of described casing 1 respectively is provided with an end cap 2, each connects the end cap of casing rear and front end rotating shaft 4 two ends of described rotor 3 through a bearing 5, and rotating shaft 4 front end sleeves at rotor 3 are provided with the wave spring washer coaxial with it 6, and the rear and front end of this wave spring washer 6 props up the rotating shaft 4 of the end cap 2 and the rotor of casing 1 front end respectively;
It is characterized in that: be provided with centrifugal base plate installation base on the end cap 2 of casing 1 rear end, the centrifugal base plate 7 of described centrifugal switch is fixed on the centrifugal base plate installation base of end cap 2 of casing 1 rear end, and the sedimentator 8 of centrifugal switch is installed in the rotating shaft 4 of rotor 3;
The bearing 5 of the rotating shaft rear end of described rotor 3 is pressed abd fixed on the end cap 2 of casing 1 rear end through a compact heap 9.
Claims (1)
1. the high monophase machine of minimum starting torque precision comprises casing, and is installed on rotor, centrifugal switch in the casing;
The rear and front end of described casing respectively is provided with an end cap, each connects the end cap of casing rear and front end the rotating shaft two ends of described rotor through a bearing, and the rotating shaft front end sleeve at rotor is provided with the wave spring washer coaxial with it, and the rear and front end of this wave spring washer props up the rotating shaft of the end cap and the rotor of casing front end respectively;
It is characterized in that: be provided with centrifugal base plate installation base on the end cap of casing rear end, the centrifugal base plate of described centrifugal switch is fixed on the centrifugal base plate installation base of end cap of casing rear end, and the sedimentator of centrifugal switch is installed in the rotating shaft of rotor;
The bearing of the rotating shaft rear end of described rotor is pressed abd fixed on the end cap of casing rear end through a compact heap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205001135U CN201754548U (en) | 2010-08-23 | 2010-08-23 | Single phase machine with minimum starting torque of high accuracy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205001135U CN201754548U (en) | 2010-08-23 | 2010-08-23 | Single phase machine with minimum starting torque of high accuracy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201754548U true CN201754548U (en) | 2011-03-02 |
Family
ID=43622280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205001135U Expired - Fee Related CN201754548U (en) | 2010-08-23 | 2010-08-23 | Single phase machine with minimum starting torque of high accuracy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201754548U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026546A (en) * | 2017-05-29 | 2017-08-08 | 苏州固特斯电子科技有限公司 | A kind of monopole asynchronous motor |
-
2010
- 2010-08-23 CN CN2010205001135U patent/CN201754548U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107026546A (en) * | 2017-05-29 | 2017-08-08 | 苏州固特斯电子科技有限公司 | A kind of monopole asynchronous motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20130823 |