CN201346500Y - Common DC bus AC frequency control system of decanter centrifuge - Google Patents
Common DC bus AC frequency control system of decanter centrifuge Download PDFInfo
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- CN201346500Y CN201346500Y CNU2008201693638U CN200820169363U CN201346500Y CN 201346500 Y CN201346500 Y CN 201346500Y CN U2008201693638 U CNU2008201693638 U CN U2008201693638U CN 200820169363 U CN200820169363 U CN 200820169363U CN 201346500 Y CN201346500 Y CN 201346500Y
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- frequency converter
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- decanter centrifuge
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Abstract
The utility model relates to a common DC bus AC frequency control system of a decanter centrifuge, belonging to the technical field of decanter centrifuge speed governing device and, comprising a decanter centrifuge. The drum of the decanter centrifuge is connected with the motor shaft of a main motor through a belt pulley and a belt. The screw-conveyor of the decanter centrifuge is connected with the output shaft of a differential. The input shaft of the differential is connected with the motor shaft of an auxiliary motor through a belt pulley and a belt. The main motor and the auxiliary motor are respectively matched and connected with a main frequency converter and an auxiliary frequency converter. The auxiliary frequency converter is connected with the main frequency converter through a DC bus. The common DC bus AC frequency control system has simple and reasonable structure, uses the DC bus connection method to connect the main frequency converter and the auxiliary frequency converter, conveniently and reliably feeds back the regenerated energy to the electric network directly, thereby reducing the electric energy absorbed from the electric network, taking the energy saving effect, additionally adjusting the rotating speed of the main motor and the auxiliary motor in order to easily adjust the differential rotating speed of the decanter centrifuge, furthermore ensuring that the centrifuge adapts the separation operating modes of different materials still better, and is deserved to be generalized.
Description
Technical field
The utility model belongs to the technical field of horizontal screw centrifuge arrangements for speed regulation, is specifically related to a kind of horizontal screw centrifuge dc bus AC variable-frequency speed regulation system altogether.
Background technology
The arrangements for speed regulation that are installed in the horizontal screw centrifuger differential mechanism input shaft end are called back of the body drive unit, these the device as: electric eddy current brake; Asynchronous motor; Fluid-power motor; Mechanical type overload protection arrangement (the power shaft rotating speed is zero) etc.When spiral lagged behind rotary drum, these devices all were to be cost to consume centrifuge kinetic energy, to power shaft effect braking moment, so as to reaching the purpose of regulating the difference rotating speed.For power shaft, back of the body drive unit is a kind of load.In the universal frequency converter governing system, the motor that links to each other with the differential mechanism power shaft is in reproduced state for a long time, runs on the 4th quadrant, accepts mechanical energy from centrifuge, the energy back of regenerative braking to the dc bus of frequency converter, is consumed it by braking resistor again.How reclaiming this portion of energy is the problem that domestic and international centrifuge manufacturing merchant earnestly is concerned about.Utilize specially designed four quadrant running frequency converter, regenerated energy directly can be fed back to electrical network, domestic seldom have an application except steel rolling mill.
The utility model content
At problems of the prior art, the purpose of this utility model is to provide a kind of horizontal screw centrifuge technical scheme of dc bus AC variable-frequency speed regulation system altogether, reduces the electric energy that receives from electrical network, plays energy-conservation effect.
Horizontal screw centrifuge is the dc bus AC variable-frequency speed regulation system altogether, comprise horizontal screw centrifuge, the main motor that it is characterized in that horizontal screw centrifuge is connected with the primary transducer of controlling main motor, the auxiliary-motor of horizontal screw centrifuge is connected with the secondary frequency converter of control auxiliary-motor, dc bus in primary transducer and the secondary frequency converter interconnects, and realizes that the energy of main motor and auxiliary-motor is shared.
Described horizontal screw centrifuge is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that described secondary frequency converter is connected with primary transducer by dc bus, dc bus is connected to filter capacitor C2 in the secondary frequency converter and the anodal and anodal mandarin orange of the filter capacitor C1 in the primary transducer is connected, and negative pole links to each other with negative pole.
Described horizontal screw centrifuge is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that the end of incoming cables of described primary transducer and secondary frequency converter is connected the three-phase alternating current electrical network of 380V.
Described horizontal screw centrifuge is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that described main motor, auxiliary-motor be connected respectively primary transducer, secondary frequency converter, for AC signal is connected, be connected for AC signal between auxiliary-motor and the secondary frequency converter between main motor and the primary transducer.
The utility model is simple and reasonable, adopts the connected mode of dc bus that primary transducer is connected with secondary frequency converter, makes things convenient for, reliably regenerated energy is directly fed back to electrical network, thereby reduce the electric energy that receives from electrical network, plays energy-conservation effect; And the response time of system is controlled by ac frequency, and dynamic characteristic is obviously improved; The rotating speed of regulating main motor and auxiliary-motor in addition is easy to regulate horizontal screw centrifuge difference rotating speed, thereby, make centrifuge better adapt to the separation operating mode of various materials, be worthy of popularization.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Among the figure: 1-primary transducer, the secondary frequency converter of 2-, 3-master's motor, 4-rotary drum, 5-screw feeder, 6-horizontal screw centrifuge, 7-differential mechanism, 8-auxiliary-motor.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Horizontal screw centrifuge is the dc bus AC variable-frequency speed regulation system altogether, comprise horizontal screw centrifuge 6, the rotary drum 4 of horizontal screw centrifuge 6 is connected the motor shaft of main motor 3 with belt by belt pulley, the screw feeder 5 of horizontal screw centrifuge 6 is connected with the output shaft of differential mechanism 7, the power shaft of differential mechanism 7 is by the motor shaft of belt pulley and belt auxiliary connection motor 8, the main motor 3 of horizontal screw centrifuge 6 is connected with the primary transducer 1 of the main motor 3 of control, the auxiliary-motor 8 of horizontal screw centrifuge 6 is connected with the secondary frequency converter 2 of control auxiliary-motor 8, the end of incoming cables of primary transducer 1 and secondary frequency converter 2 is connected the three-phase alternating current electrical network of 380V, for AC signal is connected, be connected for AC signal between auxiliary-motor 8 and the secondary frequency converter 2 between main motor 3 and the primary transducer 1.
Dc bus in primary transducer 1 and the secondary frequency converter 2 interconnects, the energy of realizing main motor 3 and auxiliary-motor 8 is shared, described dc bus is connected to the filter capacitor C2 in the secondary frequency converter 2 is linked to each other with positive pole with filter capacitor C1 positive pole in the primary transducer 1, and negative pole links to each other with negative pole.When auxiliary-motor 8 was in generating state, its electric energy fed back to main motor 3 and uses, and the response time of system control by ac frequency, dynamic characteristic is obviously improved; In addition, the rotating speed of regulating main motor and auxiliary-motor is easy to reach the purpose of regulating horizontal screw centrifuge difference rotating speed, thereby, make centrifuge better adapt to the separation operating mode of various materials.
Compared with prior art, the utlity model has following advantages:
(1) good energy-efficient performance: from the mode of connection, AC network is received primary transducer 1 and secondary frequency conversion The end of incoming cables of device 2, the dc bus of primary transducer 1 and secondary frequency converter 2 interconnects, so just can be square Just and reliably realize energy back. When spiral lagged behind, auxiliary-motor 8 all was to be in generating state, main electricity 3 in machine is at motoring condition, and auxiliary-motor 8 generatings cause busbar voltage to rise, and are then interconnected by bus, With the rising voltage consumption on main motor 3, thereby reduced the electric energy that receives from electrical network, played energy-conservation Effect.
(2) dynamic response is fast: some PID regulating system often has over control, and settling time is longer, Electric eddy current brake governing system for example, sometimes reach several minutes stable period. The frequency conversion speed-adjusting system torque rings Same ac frequency between seasonable, 150-200ms only, dynamic characteristic is obviously improved.
(3) process easily the accumulation of the rotary drum 4 interior materials that accident causes: operation during auxiliary-motor 8 counter-rotating In I quadrant (electric motor state), at this moment differential is very big: Δ n=(n1+n)/i, (n1-rotary drum rotating speed R/min; I-differential mechanism 7 speed ratios), because frequency converter has the static detent torque of 2 times of rated moments, make heap The material that amasss in rotary drum 4 is discharged easily.
(4) be conducive to realize permanent torque control: some material, for example municipal sewage contains 60%-70%'s Organic substance, heavy mud has compressibility, and solid content is at every moment changing, and makes the power of screw feeder 5 Square changes along with the fluctuation of feed rate and solid content, requires electrical system in time to control according to moment variations Inlet amount or difference rotating speed, otherwise, be easy to putty. The key of constant moment of force control is that real-time continuous is measured spiral Pusher moment must choose reasonable moment sensing element. In the fluid-power motor governing system, use the liquid oil pressure Transmitter; In the electric eddy current brake governing system, use the resistance-strain type torque sensor; At bi-motor In two frequency conversion speed-adjusting systems, then can directly utilize the torque current analog quantity of frequency converter output, or directly by logical The news mode is connected with controller, separately sensor installation.
Claims (4)
1. horizontal screw centrifuge is total to the dc bus AC variable-frequency speed regulation system, comprise horizontal screw centrifuge (6), the main motor (3) that it is characterized in that horizontal screw centrifuge (6) is connected with the primary transducer (1) of controlling main motor (3), the auxiliary-motor (8) of horizontal screw centrifuge (6) is connected with the secondary frequency converter (2) of control auxiliary-motor (8), dc bus in primary transducer (1) and the secondary frequency converter (2) interconnects, and realizes that the energy of main motor (3) and auxiliary-motor (8) is shared.
2. horizontal screw centrifuge as claimed in claim 1 is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that described secondary frequency converter (2) is connected with primary transducer (1) by dc bus, dc bus is connected to the filter capacitor C1 positive pole that the filter capacitor C2 in the secondary frequency converter (2) and primary transducer (1) is interior and links to each other with positive pole, and negative pole links to each other with negative pole.
3. horizontal screw centrifuge as claimed in claim 1 is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that described primary transducer (1) is connected the three-phase alternating current electrical network of 380V with the end of incoming cables of secondary frequency converter (2).
4. horizontal screw centrifuge as claimed in claim 1 is the dc bus AC variable-frequency speed regulation system altogether, it is characterized in that described main motor (3), auxiliary-motor (8) be connected respectively primary transducer (1), secondary frequency converter (2), for AC signal is connected, be connected for AC signal between auxiliary-motor (8) and the secondary frequency converter (2) between main motor (3) and the primary transducer (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693638U CN201346500Y (en) | 2008-11-28 | 2008-11-28 | Common DC bus AC frequency control system of decanter centrifuge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201693638U CN201346500Y (en) | 2008-11-28 | 2008-11-28 | Common DC bus AC frequency control system of decanter centrifuge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201346500Y true CN201346500Y (en) | 2009-11-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201693638U Expired - Fee Related CN201346500Y (en) | 2008-11-28 | 2008-11-28 | Common DC bus AC frequency control system of decanter centrifuge |
Country Status (1)
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| CN (1) | CN201346500Y (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672133A (en) * | 2011-03-16 | 2012-09-19 | 大连瑞谷科技有限公司 | Method for adjusting rotation speed of centrifugal machine |
| CN102901341A (en) * | 2012-09-29 | 2013-01-30 | 宝鸡石油机械有限责任公司 | Vertical rock debris drying machine driven by variable frequency motor |
| CN103464310A (en) * | 2013-09-11 | 2013-12-25 | 西安船舶工程研究院有限公司 | Automatic control method and system for vibrating centrifuge |
| CN103990555A (en) * | 2013-02-20 | 2014-08-20 | 上海市离心机械研究所有限公司 | Constant torque control method for centrifuge |
| CN104785381A (en) * | 2015-03-24 | 2015-07-22 | 苏州华冲精密机械有限公司 | Intelligent horizontal screw centrifuge used for food separation |
| CN104826747A (en) * | 2015-05-12 | 2015-08-12 | 郭丹阳 | Dual-draw ratio horizontal screw centrifuge |
| CN105855069A (en) * | 2016-04-07 | 2016-08-17 | 安徽普源分离机械制造有限公司 | Drinking water sludge multistage efficient separation equipment |
| CN105855068A (en) * | 2016-04-07 | 2016-08-17 | 安徽普源分离机械制造有限公司 | High-efficiency processing device for tap water sludge |
| CN105903576A (en) * | 2016-04-07 | 2016-08-31 | 安徽普源分离机械制造有限公司 | Environment-friendly energy-saving tap water sludge high-efficient separation system |
| CN112791861A (en) * | 2019-11-13 | 2021-05-14 | 丽水市瑞特环保科技有限公司 | Horizontal spiral discharge sedimentation centrifuge |
-
2008
- 2008-11-28 CN CNU2008201693638U patent/CN201346500Y/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102672133A (en) * | 2011-03-16 | 2012-09-19 | 大连瑞谷科技有限公司 | Method for adjusting rotation speed of centrifugal machine |
| CN102901341A (en) * | 2012-09-29 | 2013-01-30 | 宝鸡石油机械有限责任公司 | Vertical rock debris drying machine driven by variable frequency motor |
| CN103990555A (en) * | 2013-02-20 | 2014-08-20 | 上海市离心机械研究所有限公司 | Constant torque control method for centrifuge |
| CN103464310A (en) * | 2013-09-11 | 2013-12-25 | 西安船舶工程研究院有限公司 | Automatic control method and system for vibrating centrifuge |
| CN103464310B (en) * | 2013-09-11 | 2016-06-22 | 西安船舶工程研究院有限公司 | The autocontrol method of vibrating centrifuge and system |
| CN104785381A (en) * | 2015-03-24 | 2015-07-22 | 苏州华冲精密机械有限公司 | Intelligent horizontal screw centrifuge used for food separation |
| CN104826747A (en) * | 2015-05-12 | 2015-08-12 | 郭丹阳 | Dual-draw ratio horizontal screw centrifuge |
| CN105855069A (en) * | 2016-04-07 | 2016-08-17 | 安徽普源分离机械制造有限公司 | Drinking water sludge multistage efficient separation equipment |
| CN105855068A (en) * | 2016-04-07 | 2016-08-17 | 安徽普源分离机械制造有限公司 | High-efficiency processing device for tap water sludge |
| CN105903576A (en) * | 2016-04-07 | 2016-08-31 | 安徽普源分离机械制造有限公司 | Environment-friendly energy-saving tap water sludge high-efficient separation system |
| CN112791861A (en) * | 2019-11-13 | 2021-05-14 | 丽水市瑞特环保科技有限公司 | Horizontal spiral discharge sedimentation centrifuge |
| CN112791861B (en) * | 2019-11-13 | 2024-04-05 | 丽水市瑞特环保科技有限公司 | Horizontal spiral discharging sedimentation centrifuge |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GREEN WATER SEPERATION EQUIPMENT CO., LTD. Free format text: FORMER NAME: LVSHUI SEPARATION EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 323903 No. 58 anding East Road, Wen Town, Zhejiang, Qingtian Patentee after: Green Water Seperation Equipment Co., Ltd. Address before: 323903 No. 58 anding East Road, Wen Town, Zhejiang, Qingtian Patentee before: CHINA GREEN WATER SEPARATION EQUIPMENT CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20171128 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |