CN2779719Y - Thin-seam four-quadrant AC frequency-converting electrical haulage shearer - Google Patents
Thin-seam four-quadrant AC frequency-converting electrical haulage shearer Download PDFInfo
- Publication number
- CN2779719Y CN2779719Y CN 200520040801 CN200520040801U CN2779719Y CN 2779719 Y CN2779719 Y CN 2779719Y CN 200520040801 CN200520040801 CN 200520040801 CN 200520040801 U CN200520040801 U CN 200520040801U CN 2779719 Y CN2779719 Y CN 2779719Y
- Authority
- CN
- China
- Prior art keywords
- machine
- quadrant
- coal
- frequency
- crossheading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model relates to a thin-seam four-quadrant AC frequency-converting electrical haulage shearer. The utility model mainly solves the technical problems of large working surface inclination angle, etc. the utility model adopts the technical scheme that a four-quadrant running frequency-converting device capable of regenerative braking is arranged in an external electronic system at a groove. The four-quadrant running frequency-converting device is connected with a traction motor with a brake through a cable. The utility model is suitable for a low seam mining machinery with large working surface inclination angles, high traction speed and heavy weight.
Description
Technical field:
The utility model relates to a kind of coal-winning machine, particularly a kind of AC frequency conversion electrical haulage shearer.
Background technology:
Low-voltage alternating-current frequency conversion electrical haulage shearer, installation site according to traction transformer and RHVC, can be divided into airborne, non-airborne and accurate airborne three kinds, the low seam mining machinery fuselage is short and small, the space is limited, when adopting low-voltage alternating-current frequency conversion electrical haulage, normally adopts non-airborne mode, be that its traction transformer and RHVC are installed in the crossheading of coal-face, be connected in traction electric machine on the coal-winning machine fuselage through trailing cable.Existing non-airborne AC frequency conversion electrical haulage shearer, it is the RHVC that adopts dynamic braking, its structure as shown in Figure 3, this device is implemented the Electric Traction speed governing at first quartile and third quadrant, its traction characteristics is: when upwards traction of coal-winning machine, or traction downwards and inclination angle are during less than critical value, the torque of traction electric machine is identical with direction of rotation, traction electric machine fortune is drawn in motoring condition (first or third quadrant), when coal-winning machine traction downwards and inclination angle during greater than critical value, the torque and the direction of rotation of traction electric machine are opposite, traction electric machine runs on generating state (second or four-quadrant), the potential energy of its downslide changes electric energy into, change heat energy into by brake resistance again, and need, but the brake resistance power of low seam mining machinery is little by the cooling water heat radiation, cooling water is limited for amount, can only be applicable to that the working face inclination angle is less, conditions such as hauling speed is low and coal-winning machine weight is lighter.
The utility model content:
Technical problem to be solved in the utility model, a kind of girdle four-quadrant AC frequency conversion electrical haulage shearer is provided, it can overcome the defective of existing low seam mining machinery, be applicable to the low seam mining machinery that inclination angle, hauling speed and weight are bigger, and braking moment is continous-stable comparatively, and motion state is comparatively now thought.
The technical scheme in the invention for solving the above technical problem is: coal-winning machine comprises electrical system in organic dispatch from foreign news agency gas system and the machine, each component of the outer electric system of machine is arranged at crossheading, each component of electrical system is arranged on coal-winning machine in the machine, be connected with towing leader cable and towing trailing cable between the inside and outside electrical system of machine, be characterized in: be provided with the four quadrant running RHVC of an energy feeding braking outside the machine at crossheading place in the electric system, four-quadrant fortune is drawn RHVC and is connected traction electric machine through cable.Traction electric machine is equipped with brake, and this RHVC is implemented the Electric Traction speed governing at first and third quadrant, and second, four-quadrant implements the dynamic brake speed governing, the electric energy of potential energy converting and energy is by the energy feedback unit feedback grid.
The energy feedback unit that the four-quadrant restraint draws RHVC is parallel between rectifier and the inverter.
The utility model adopts two general quadrant frequency converters to add the AC variable-frequency speed regulation system of energy feedback unit, make the traction motor for coal mining machine can be by four quadrant running, realize the stepless speed regulation traction of electronic operating mode and generating operation mode, the brake resistance that has overcome traditional low seam mining machinery is big, shortcomings such as cooling difficulty, be applicable to that the working face inclination angle is bigger, higher and the bigger grade of the coal-winning machine weight operating condition of hauling speed, enlarge the scope of application of coal-winning machine at thin seam mining, simultaneously, the braking moment that its energy feeding braking produced is continous-stable comparatively, therefore coal-winning machine is when descending, speed ratio is more steady, and running status is more satisfactory.
Description of drawings:
Fig. 1 is the equipment connection diagram of the inside and outside setting of the utility model machine.
Fig. 2 is this product novel energy regenerative braking four quadrant running converter plant schematic diagram.
Fig. 3 is the AC frequency control apparatus schematic diagram of two quadrants frequency converter+dynamic braking resistance.
Embodiment:
With reference to Fig. 1, girdle four-quadrant AC frequency conversion electrical haulage shearer adopts non-airborne mode to install, comprise electrical system in organic dispatch from foreign news agency gas system and the machine, each composition of the outer electric system of its machine is mounted in the crossheading (8) of coal-face, each composition of electrical system is mounted on the coal-winning machine fuselage (9) in the machine, there is the magnetic starter 1 ' of control winning machine cutting part and pumping plant in the outer electric system of machine; 1 " the magnetic starter 1 of control tractive unit, traction transformer 2, four quadrant running variable-frequency governor 3, the magnetic starter of outer electric system of machine and working face conveyer is chain; Electrical system includes electric cabinet 4, cutting motor (M1, M2, M3, M4), traction electric machine 41 (M5), 42 (M6) Electric Machine at Pumping Station M7, electromagnetically operated valve group and mechanical brake 41 ', 42 ' in the machine; Be connected with towing leader cable (W1) and towing trailing cable (W2) in outer electric system of machine and the machine between the electrical system.
With reference to Fig. 2, the four-quadrant fortune of energy feeding braking is drawn RHVC 3 and is included power supply 31, rectifier 32, inverter 33, energy feedback unit 34, controller 35, brake control unit 36,37, wherein two quadrant frequency converters and the energy feedback unit of being made up of rectifier 32 and inverter 33 34 is these device main body, this two quadrants frequency converter can be general, so that the seriation of product, standardization, generalization; Rectifier 32 is connected with power supply and draws and inverter 33 in the device, inverter 33 is connected in traction motor 41,42, its energy feedback unit 34 is to be connected in parallel on the link circuit of rectifier 32 and inverter 33, controller 35 connects energy feedback unit 34 and brake control unit (PB6) 36 respectively, brake control unit 36 connects another brake control unit (PA7-2) 37, this brak control unit 37 is installed on coal-winning machine 9 fuselages, and connects the brake 41 ', 42 ' of two traction motors 41,42 respectively; The basic function of the four quadrant running RHVC 3 of energy feeding braking is, under motoring condition, power supply 31 becomes direct current with rectifier 32, inverter 33 is under controller 35 effects, direct voltage is become the AC power of given frequency and voltage, realize speed governing traction motor 41,42; Under on-position, because two quadrant frequency converters are provided with energy feedback unit 34.The energy that traction motor 41,42 produces can be fed back to electrical network in braking procedure, thereby four-quadrant (forward is electronic, and oppositely generating is oppositely electronic, the oppositely generating) operation that realizes traction motor 41,42 also realizes energy-conservation purpose simultaneously; Above-mentioned operation principle has detailed description at Chinese patent " ZL03210721.8 four-quadrant fortune is drawn the AC frequency conversion electrical haulage shearer ", the transferable all bigger coal-winning machine of girdle inclination angle, hauling speed and weight that is applied in non-airborne mounting means of its relevant art may solve the technical barrier that existing girdle coal machine can't overcome.
Claims (2)
1, a kind of girdle four-quadrant AC frequency conversion electrical haulage shearer, this coal-winning machine comprises electrical system in organic dispatch from foreign news agency gas system and the machine, each component of the outer electric system of machine is arranged at crossheading, each component of electrical system is arranged on coal-winning machine in the machine, in the machine, be connected with towing leader cable and towing trailing cable between the outer electric system, it is characterized in that: the four quadrant running RHVC (3) that outside the machine that crossheading (8) is located, is provided with energy back braking in the electric system, four quadrant running RHVC (3) connects traction electric machine (41 through cable, 42), traction electric machine (41,42) brake (41 ' is housed, 42 ').
2, girdle four-quadrant AC frequency conversion haulage shearer according to claim 1, it is characterized in that four-quadrant fortune that crossheading (8) locates to be provided with draws the energy feedback unit (33) of RHVC (3) and be parallel between rectifier (32) and the inverter (33), energy feedback unit (33) is connected with controller (35), controller (35) is connected with brake control unit (36,37), one brake control unit (36) is arranged on crossheading (8), and another brake control unit (37) is arranged on coal-winning machine (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040801 CN2779719Y (en) | 2005-04-12 | 2005-04-12 | Thin-seam four-quadrant AC frequency-converting electrical haulage shearer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520040801 CN2779719Y (en) | 2005-04-12 | 2005-04-12 | Thin-seam four-quadrant AC frequency-converting electrical haulage shearer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2779719Y true CN2779719Y (en) | 2006-05-10 |
Family
ID=36753804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520040801 Expired - Fee Related CN2779719Y (en) | 2005-04-12 | 2005-04-12 | Thin-seam four-quadrant AC frequency-converting electrical haulage shearer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2779719Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013020384A1 (en) * | 2011-08-05 | 2013-02-14 | 三一重型装备有限公司 | Cutting speed regulating system and boring machine |
-
2005
- 2005-04-12 CN CN 200520040801 patent/CN2779719Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013020384A1 (en) * | 2011-08-05 | 2013-02-14 | 三一重型装备有限公司 | Cutting speed regulating system and boring machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102545474A (en) | Variable speed machine assembly and method for making the same | |
| CN105984351A (en) | Power system of electric-driven dumper, electric-driven dumper and power switching method of electric-driven dumper | |
| CN103703649A (en) | Device for supplying an aircraft on the ground with electricity | |
| CN203119589U (en) | Power generator device specialized for energy saving elevator | |
| CN110834550A (en) | Vehicle AC transmission system | |
| CN107882686A (en) | Flexible DC power transmission stormy waves hybrid power system | |
| CN103492303A (en) | Method and device for the power supply for rack and pinion lifts | |
| CN1664359A (en) | Wind power generation equipment | |
| CN107672458A (en) | Double the diesel generating set shunter power sources and its method of supplying power to of a kind of low emission high-environmental | |
| CN2779719Y (en) | Thin-seam four-quadrant AC frequency-converting electrical haulage shearer | |
| CN107054069A (en) | A kind of method that utilization wind energy supplements electric automobile electric power storage | |
| CN204547809U (en) | Electric transmission dumping car power system and electric transmission dumping car | |
| CN106470001A (en) | A kind of converter and electric machine control system | |
| CN106741863A (en) | The high-lift system of aircraft | |
| CN102004198A (en) | Double-axis feedback low-voltage alternating current variable frequency electric transmission test system and method | |
| CN202550458U (en) | Electric wire unreeling frame | |
| CN201756427U (en) | Mining explosion-proof variable-frequency hoist | |
| CN202103583U (en) | Mining explosion-proof and intrinsically safe AC frequency converter | |
| CN106364335A (en) | Device and method for automatically adjusting drooping coefficient of bidirectional variable-flow feedback device | |
| KR20120134740A (en) | Brake system for wind turbine | |
| CN107178426B (en) | A kind of storage function governor gear transmission turbogenerator | |
| CN201909712U (en) | Double-shaft alternating current frequency conversion power transmission testing system | |
| CN202130995U (en) | Frequency-variable transmission system based on common DC bus technique | |
| CN205377730U (en) | System for full power convertor drive wind generating set's generator carries out barring | |
| CN201069861Y (en) | Reverser speed-adjusting device for lifter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |