CN102536359A - Jigger device with axially injected worms and gears - Google Patents
Jigger device with axially injected worms and gears Download PDFInfo
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- CN102536359A CN102536359A CN2012100174381A CN201210017438A CN102536359A CN 102536359 A CN102536359 A CN 102536359A CN 2012100174381 A CN2012100174381 A CN 2012100174381A CN 201210017438 A CN201210017438 A CN 201210017438A CN 102536359 A CN102536359 A CN 102536359A
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Abstract
A jigger device with axially injected worms and gears relates to a jigger device for ensuring the normal operation of a turbogenerator set, and solves the problems that the conventional jigger device of a turbogenerator adopts a composite deceleration jigger device with chains, worm gears and gears, has a large number of gear pairs, large deceleration grades, and a complex structure, and occupies a large space. One end of a worm shaft is connected with the motor of the jigger; the other end of the worm shaft is connected with a handwheel; worm teeth are meshed with a worm gear; a drive gear is mounted with a right-hand thread on the worm wheel shaft in a matched manner; two rollers 7 are arranged in ring-shaped grooves and are symmetric to each other relative to the vertical center line of the drive gear; each roller is connected with the lower end of a pull rod through a pin; the upper end of the pull rod is mounted on a pull rod shaft; the pull rod shaft is parallel to the worm shaft; one end of a crank is mounted on a pull rod shaft; the other end of the crank is propped against a piston rod; a piston cavity is communicated with the cavity in a sliding valve of an servomotor; the hand lever is mounted on the pull rod shaft; and a projecting lug is propped against a spring sleeve. The invention is applied to jiggers of turbogenerator sets.
Description
Technical field
The present invention relates to a kind of barring gear that is used for the normal operation of Turbo-generator Set.
Background technique
When steam turbine starts,, often need at the impulsion rotor with the forward direction shaft seal steam for rapid gas clean-up; Major part was trapped in cylinder upper after these steam got into cylinder, and it is inhomogeneous to cause cylinder and rotor to be heated up and down, if stationary rotor is motionless; Just can be bent upwards distortion because of self upper and lower temperature difference produces, crooked back rotor c.g. and rotating center do not coincide, and certainly will produce very big centrifugal force after the unit red switch; Cause vibration, even cause the friction of sound part; Therefore, before the steam turbine red switch, to drive rotor and do to slowly run, rotor is heated evenly, start smoothly in order to unit with barring gear.
After the halt turbines, parts such as cylinder and rotor are by hot cooling gradually, and its underpart cooling is fast; The top cooling is slow, and rotor produces bending because of upper and lower temperature difference, and degree of crook increased along with the time after shutting down; For Large Steam Turbine Sets, this thermal bending can reach very big numerical value, and need just can fade away through tens hours; Before thermal bending is reduced to regulation numerical value, be not allow to restart steam turbine.Therefore, after the shutdown, should drop into barring gear, jiggering can stir the steam flow that closes in the cylinder, is beneficial to eliminate the upper and lower temperature difference of cylinder, prevents rotor deformation, helps to eliminate the damage of the higher axle journal of temperature to bearing shell.
Existing rolling gear of turbine adopts chain, worm and gear, the compound deceleration barring gear of gear, and its shortcoming is: adopt 2～3 grades of gear pairs, retarding stage is many, so the structure more complicated, needs occupation space big.This jiggering mode is fit to 20～300,000 kilowatts of steam turbine set.
Summary of the invention
The objective of the invention is to adopt chain, worm and gear, the compound deceleration barring gear of gear for solving existing rolling gear of turbine; Gear pair is many, retarding stage is many, complex structure; Need the big problem of occupation space, provide a kind of worm and gear gear shaft to the throw-in type barring gear.
The present invention includes housing, worm shaft, worm gear, barring motor, worm-wheel shaft, driving gear, two rollers, two pull bars, two pins, pull rod shaft, crank throw, hand lever, spring housing, pressure spring, spring seat, chock, handwheel, oil engine, oil engine guiding valve, electromagnet and position limit switches, the two ends of worm shaft are installed on the housing, and an end of worm shaft is connected with barring motor; The other end of worm shaft is connected with handwheel, worm tooth on the worm shaft and worm gear engagement, and worm gear is installed on the input end of worm-wheel shaft; The output terminal outer surface of worm-wheel shaft is provided with right-handed thread, and on housing, the endoporus of driving gear is provided with the thread groove that matches with right-handed thread through Bearing Installation at the two ends of worm-wheel shaft; Driving gear cooperates installation with right-handed thread on the worm-wheel shaft, and the flange outer surface of driving gear right-hand member is provided with annular groove, and two rollers are symmetricly set in the annular groove with the vertical center line of driving gear; Two pull bars are symmetricly set on the outside of two rollers, and each roller is connected with the lower end of pull bar through a pin, and the upper end of pull bar is installed on the pull rod shaft; Pull rod shaft is arranged in the housing and with worm shaft and laterally arranges; The two ends of pull rod shaft all are arranged on the outside of housing, and an end of crank throw is installed on the end of the pull rod shaft that exposes to housing outside, and the other end of crank throw leans with piston rod on the oil engine mutually; Piston rod is connected with piston; The piston cavity on piston top is communicated with the inner cavity of oil engine guiding valve through pipeline, and oil engine and oil engine guiding valve are installed on the housing, and the valve rod upper end in the cavity is connected with electromagnet; Hand lever is installed on the other end of the pull rod shaft that exposes to the housing outside; Hand lever is provided with lug near a side of pull rod shaft, and lug withstands on the spring housing, and the upper end of pressure spring is installed in the spring housing; The lower end of pressure spring is installed in the spring seat; Spring seat is installed on the housing, and the right side that worm-wheel shaft is positioned at driving gear is provided with the shaft shoulder, and chock is over against a side setting of hand lever; Position limit switch is over against the opposite side setting of hand lever, and chock and position limit switch are installed on the outer wall of housing.
Advantage of the present invention is: one, slow down to be the first time of barring gear of the present invention by the worm tooth 2-1 on the worm shaft 2 and worm gear 3 engagement completion, with the most about 15.2r/min of speed drop of the 730r/min of barring motor 4; Slowing down for the second time of barring gear is to be accomplished by driving gear 6 and jiggering gearwheel 22 engagements on the turbine rotor 21, with the speed drop of the about 15.2r/min specified jiggering rotating speed of about 4.7r/min extremely.The present invention has saved chain transmission, and has only a pair of gear pair, and therefore, it is few, simple in structure that the present invention has retarding stage, and occupation space is little, is fit to the low speed jiggering of 50,000 kilowatts of steam turbine set.Barring gear of the present invention is the enable manual input both, can drop into automatically again, and both enable manual jiggerings again can electric barring.Two, the present invention can accomplish the moving rotor of rotor of steam turbo generator low-speed discs when shutting down, and has avoided rotor thermal bending.Three, the present invention can start down hot fast.Four, when the Turbo-generator Set red switch, barring gear of the present invention can be thrown off automatically.
Description of drawings
Fig. 1 is an overall structure plan view of the present invention, and Fig. 2 is the A-A sectional view of Fig. 1, and Fig. 3 is the B-B sectional view of Fig. 1, and Fig. 4 is the G-G sectional view of Fig. 1, and Fig. 5 is the C-C sectional view of Fig. 1, and Fig. 6 is the E-E sectional view of Fig. 1.
Embodiment
Embodiment one: combine Fig. 1～Fig. 6 that this mode of execution is described, this mode of execution comprises housing 1, worm shaft 2, worm gear 3, barring motor 4, worm-wheel shaft 5, driving gear 6, two rollers 7, two pull bars 8, two pins 9, pull rod shaft 10, crank throw 11, hand lever 12, spring housing 13, pressure spring 14, spring seat 15, chock 16, handwheel 17, oil engine 18, oil engine guiding valve 19, electromagnet 20 and position limit switches 23, the two ends of worm shaft 2 through Bearing Installation on housing 1; One end of worm shaft 2 is connected with barring motor 4 through coupling; The other end of worm shaft 2 is connected with handwheel 17, worm tooth 2-1 on the worm shaft 2 and worm gear 3 engagements, and worm gear 3 is installed on the input end of worm-wheel shaft 5; Worm gear 3 and worm-wheel shaft 5 are connected transmitting torque through key; The output terminal outer surface of worm-wheel shaft 5 is provided with right-handed thread 5-1, and on housing 1, the endoporus of driving gear 6 is provided with the thread groove that matches with right-handed thread 5-1 through Bearing Installation at the two ends of worm-wheel shaft 5; Driving gear 12 is the standard straight toothed spur gear; Driving gear 6 cooperates installation with right-handed thread 5-1 on the worm-wheel shaft 5, and the flange outer surface of driving gear 6 right-hand members is provided with annular groove 6-1, and two rollers 7 are symmetricly set in the annular groove 6-1 with the vertical center line of driving gear 6; Two pull bars 8 are symmetricly set on the outside of two rollers 7; And each roller 7 is connected with the lower end of pull bar 8 through a pin 9, and the upper end of pull bar 8 is installed on the pull rod shaft 10 through sleeve 24, and pull bar 8 is connected transmitting torque with pull rod shaft 10 through two keys; Pull rod shaft 10 is arranged in the housing 1 and with worm shaft 2 and laterally arranges; The two ends of pull rod shaft 10 all are arranged on the outside of housing 1, and an end of crank throw 11 is installed on the end of the pull rod shaft 10 that exposes to housing 1 outside, and the other end of crank throw 11 leans with piston rod 18-1 on the oil engine 18 mutually; Piston rod 18-1 is connected with piston 18-2; The piston cavity 18-3 on piston 18-2 top is communicated with oil engine guiding valve 19 inner cavity 19-1 through pipeline, and oil engine 18 is installed on the housing 1 with oil engine guiding valve 19, and the valve rod 19-2 upper end among the cavity 19-1 is connected with electromagnet 20; Hand lever 12 is installed on the other end of the pull rod shaft 10 that exposes to housing 1 outside; In hand lever 12, pull bar 8 and pull rod shaft 10, wherein any part rotates, and all the other two parts are all done equidirectional rotation with angle.Hand lever 12 is provided with lug 12-1 near a side of pull rod shaft 10; Lug 12-1 withstands on the spring housing 13, and the upper end of pressure spring 14 is installed in the spring housing 13, and the lower end of pressure spring 14 is installed in the spring seat 15; Spring seat 15 is installed on the housing 1; The right side that worm-wheel shaft 5 is positioned at driving gear 6 is provided with shaft shoulder 5-2, and shaft shoulder 5-2 is used to limit driving gear 6 and moves to right-hand member, and chock 16 is over against a side setting of hand lever 12; Position limit switch 23 is over against the opposite side setting of hand lever 12, and chock 16 is installed on the outer wall of housing 1 with position limit switch 23.Chock 16 is used to limit the position of hand lever 12, thereby the position of restriction pull bar 8 reaches the spacing purpose that driving gear 6 is moved to left end.Position limit switch 23 links to each other with electric button in the jiggering control box through lead, and position limit switch 23 is in order to closing of circuit, auto-supply, the automatic fuel cutoff of realization jiggering motor 4.Oil engine 18 is existing technology with oil engine guiding valve 19.The effect of handwheel 17 is when unit maintenance or station service stop supplying, to carry out manual jiggering.
Embodiment two: combine Fig. 5 that this mode of execution is described, the diameter of the piston 18-2 of this mode of execution is 160mm～180mm, and the range of piston 18-2 is 80mm～85mm.Other composition is identical with embodiment one with annexation.
Embodiment three: combine Fig. 5 that this mode of execution is described, the diameter of the piston 18-2 of this mode of execution is 170mm, and the range of piston 18-2 is 81mm.Other composition is identical with embodiment one with annexation.
Working principle of the present invention:
1, manually drop into:
At first guarantee turbine rotor 21 stall before manually dropping into, then a rotation hand wheel 17, simultaneously push-and-pull hand lever 12; Make jiggering gearwheel 22 engagements on driving gear 6 and the turbine rotor, the boot disk tramcar motor 4 then, and barring motor 4 drives worm shafts 2 and rotates; Worm shaft 2 drives worm gear 3 and rotates; Worm-wheel shaft 5 rotates thereupon, and the jiggering gearwheel 22 that driving gear 6 rotates and drives on the turbine rotor 21 rotates, and rotates thereby drive rotor of steam turbo generator 21; Be moved to the left with the right-handed thread 5-1 on the worm-wheel shaft 5 when driving gear 6 rotates, when driving gear 6 shifts out jiggering gearwheel 22, manually jiggering finishes.
2, drop into automatically:
Turbo-generator Set is in cold start and hot shutdown, and barring gear can both drop into automatically.But guarantee that turbine rotor 21 has stopped operating or rotating speed approaching zero.
When the unit cold start, at first jacking(oil) pump is started, rotor of steam turbo generator is held up 0.04～0.06mm under the effect of apical axis oil pressure; While pressure is that the lubricant oil of 0.118 ± 0.00196MPa sprays to worm gear 3, worm tooth 2-1 and driving gear 6 through outside and internal oil pipe; To take away heat and to reduce friction, this moment, valve rod 19-2 moved up under the magnetic force of electromagnet 20, made lubricant oil get among the piston cavity 18-3 of oil engine 18; Piston 18-2 promotes the downward top of piston rod 18-1 crank throw 11; Make crank throw 11 drive pull rod shaft 10 and rotate, pull bar 8 rotates thereupon and drives roller 7 simultaneously and move to the right-hand member of worm-wheel shaft 5, makes driving gear 6 move to the direction that jiggering gearwheel 22 meshes; The automated operator of control panel makes barring motor 4 continuity point cars (promptly connect circuit simultaneously; And break off) make jiggering gearwheel 22 engagements on driving gear 6 and the turbine rotor 21, after meshing fully, hand lever 12 contacting travel switches 23; Control panel is just connected barring motor 4 circuit fully, and jiggering formally begins.
During the hot shutdown of unit, it is the same to drop into the jiggering principle automatically.
Answer strictness to prevent when turbine rotor 21 rotating speeds are higher than 4.7r/min, to press start button.
For the automatic input of implement device, be designed with oil engine 18, oil engine guiding valve 19 and electromagnet 20 in the device.Oil engine piston diameter 170MM, piston range 81MM.Adopt " O " RunddichtringO rubber piston ring; (0.118 ± 0.00196MPa) acts on the piston and produces by lubricant oil to make oil pressure that piston rod moves downward; The spring that rushes down under the back piston when oil pressure resets piston pulling piston rod, and the oil extraction of advancing of oil engine 18 is controlled by oil engine guiding valve 19.Slide valve sleeve and guiding valve loop bar all are to be processed by stainless guiding principle.Slide valve lever and electromagnet pull bar join, when the pull-up of electromagnet coil excitation pull bar, slide valve lever can on move 15MM, when moving on the slide valve lever, lubricant oil flow on the oil engine piston through guiding valve.When slide valve lever moved down, the oil on the piston flow in the bearing support under the guiding valve through guiding valve again.
The automatic input of device is exactly through the operating hydraulically operated element of electric elements, thereby mechanical component is accomplished to be dropped into, the function of engagement.
3, withdraw from automatically:
Turbo-generator Set in the jiggering process or jiggering end, barring gear can both withdraw from automatically during unit starting.
In unit jiggering process, stop jiggering like need, need only press the button of stopping quotation on the exchange, barring motor 4 stalls this moment; And turbine rotor 21 is very big owing to rotary inertia, and still in low speed rotation, this moment, driving gear 6 was by initiatively becoming passive; Make its receive one with engagement peripheral force in the opposite direction, this moment, pull rod shaft 10 was also rotated thereupon, the hand lever 12 that links to each other with pull rod shaft 10 by working position I to time off-position II; Referring to Fig. 2, hand lever 12 breaks away from the roller of position limit switch 23, and circuit is broken off; Lubricant oil stops supplying under the control of electrical apparatus element, and the light of stopping quotation on the exchange shows barring gear disengaging work.
When the red switch of jiggering end of a period unit starting, under the effect of steam power, the rotating speed of turbine rotor 21 is in case above the jiggering rotating speed, and driving gear 6 was accomplished by initiatively becoming passive equally and withdrawed from automatically this moment.
4, other jiggering mode:
(1), 180 ° of jiggerings:
When maintenance or electricity consumption stop supplying and when needing the moving turbine rotor 21 of 180 ° of dishes, available hand rotates handwheel 17, till turbine rotor 21 rotates 180 °.
Jiggering when (2), station service stops supplying:
When station service stopped supplying, available hand rotated handwheel 17, made turbine rotor 21 rotate 180 ° in per 30 minutes.
Claims (3)
1. a worm and gear gear shaft is to the throw-in type barring gear; Said barring gear comprises housing (1), worm shaft (2), worm gear (3), barring motor (4), worm-wheel shaft (5), driving gear (6), two rollers (7), two pull bars (8), two pins (9), pull rod shaft (10), crank throw (11), hand lever (12), spring housing (13), pressure spring (14), spring seat (15), chock (16), handwheel (17), oil engine (18), oil engine guiding valve (19), electromagnet (20) and position limit switch (23); It is characterized in that: the two ends of worm shaft (2) are installed on the housing (1); One end of worm shaft (2) is connected with barring motor (4), and the other end of worm shaft (2) is connected with handwheel (17), worm tooth (2-1) on the worm shaft (2) and worm gear (3) engagement; Worm gear (3) is installed on the input end of worm-wheel shaft (5); The output terminal outer surface of worm-wheel shaft (5) is provided with right-handed thread (5-1), and on housing (1), the endoporus of driving gear (6) is provided with the thread groove that matches with right-handed thread (5-1) through Bearing Installation at the two ends of worm-wheel shaft (5); Driving gear (6) cooperates installation with right-handed thread (5-1) on the worm-wheel shaft (5); The flange outer surface of driving gear (6) right-hand member is provided with annular groove (6-1), and two rollers (7) are symmetricly set in the annular groove (6-1) with the vertical center line of driving gear 6, and two pull bars (8) are symmetricly set on the outside of two rollers (7); And each roller (7) is connected with the lower end of pull bar (8) through a pin (9); The upper end of pull bar (8) is installed on the pull rod shaft (10), and pull rod shaft (10) is arranged in the housing (1) and with worm shaft (2) and laterally arranges, and the two ends of pull rod shaft (10) all are arranged on the outside of housing (1); One end of crank throw (11) is installed on the end of the pull rod shaft (10) that exposes to housing (1) outside; The other end of crank throw (11) leans with piston rod (18-1) on the oil engine (18) mutually, and piston rod (18-1) is connected with piston (18-2), and the piston cavity (18-3) on piston (18-2) top is communicated with through the cavity (19-1) of pipeline with oil engine guiding valve (19) inside; Oil engine (18) and oil engine guiding valve (19) are installed on the housing (1); Valve rod (19-2) upper end in the cavity (19-1) is connected with electromagnet (20), and hand lever (12) is installed on the other end of the pull rod shaft (10) that exposes to housing (1) outside, and hand lever (12) is provided with lug (12-1) near a side of pull rod shaft (10); Lug (12-1) withstands on the spring housing (13); The upper end of pressure spring (14) is installed in the spring housing (13), and the lower end of pressure spring (14) is installed in the spring seat (15), and spring seat (15) is installed on the housing (1); The right side that worm-wheel shaft (5) is positioned at driving gear 6 is provided with the shaft shoulder (5-2); Chock (16) is over against a side setting of hand lever (12), and position limit switch (23) is over against the opposite side setting of hand lever (12), and chock (16) and position limit switch (23) are installed on the outer wall of housing (1).
According to the said worm and gear gear shaft of claim 1 to the throw-in type barring gear, it is characterized in that: the diameter of said piston (18-2) is 160mm～180mm, the range of piston (18-2) is 80mm～85mm.
According to the said worm and gear gear shaft of claim 2 to the throw-in type barring gear, it is characterized in that: the diameter of said piston (18-2) is 170mm, the range of piston (18-2) is 81mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100174381A CN102536359A (en) | 2012-01-19 | 2012-01-19 | Jigger device with axially injected worms and gears |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100174381A CN102536359A (en) | 2012-01-19 | 2012-01-19 | Jigger device with axially injected worms and gears |
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| Publication Number | Publication Date |
|---|---|
| CN102536359A true CN102536359A (en) | 2012-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100174381A Pending CN102536359A (en) | 2012-01-19 | 2012-01-19 | Jigger device with axially injected worms and gears |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102536359A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100311A (en) * | 2014-07-22 | 2014-10-15 | 哈尔滨广瀚新能动力有限公司 | Hydraulic planetary drive type turning gear |
| CN108386241A (en) * | 2018-04-20 | 2018-08-10 | 中国电建集团河南工程有限公司 | Hydraulic chain automatic barring gear |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU83215A1 (en) * | 1948-05-05 | 1949-11-30 | К.Г. Дрожилов | Motorized automatic rotator for steam and gas turbines |
| SU111355A1 (en) * | 1957-02-18 | 1957-11-30 | Б.А. Верхорубов | Automatic shaft device |
| AT216537B (en) * | 1960-03-31 | 1961-08-10 | Elin Union Ag | Electrically driven shaft turning device, in particular for gas or steam turbines |
| CN2780999Y (en) * | 2005-04-21 | 2006-05-17 | 王智 | Barring gear |
-
2012
- 2012-01-19 CN CN2012100174381A patent/CN102536359A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU83215A1 (en) * | 1948-05-05 | 1949-11-30 | К.Г. Дрожилов | Motorized automatic rotator for steam and gas turbines |
| SU111355A1 (en) * | 1957-02-18 | 1957-11-30 | Б.А. Верхорубов | Automatic shaft device |
| AT216537B (en) * | 1960-03-31 | 1961-08-10 | Elin Union Ag | Electrically driven shaft turning device, in particular for gas or steam turbines |
| CN2780999Y (en) * | 2005-04-21 | 2006-05-17 | 王智 | Barring gear |
Non-Patent Citations (3)
| Title |
|---|
| 吴雪忠: "汽轮机盘车设备结构改进", 《热力透平》, vol. 32, no. 3, 30 September 2003 (2003-09-30), pages 194 - 196 * |
| 罗志刚: "汽轮机盘车装置的故障分析与处理", 《河北电力技术》, vol. 21, no. 2, 25 April 2002 (2002-04-25), pages 46 - 47 * |
| 高凤泉 等: "200MW汽轮机盘车装置结构及故障诊断", 《汽轮机技术》, vol. 46, no. 6, 30 December 2004 (2004-12-30), pages 470 - 471 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104100311A (en) * | 2014-07-22 | 2014-10-15 | 哈尔滨广瀚新能动力有限公司 | Hydraulic planetary drive type turning gear |
| CN104100311B (en) * | 2014-07-22 | 2015-07-08 | 哈尔滨广瀚新能动力有限公司 | Hydraulic planetary drive type turning gear |
| CN108386241A (en) * | 2018-04-20 | 2018-08-10 | 中国电建集团河南工程有限公司 | Hydraulic chain automatic barring gear |
| CN108386241B (en) * | 2018-04-20 | 2023-09-29 | 中国电建集团河南工程有限公司 | Hydraulic chain type automatic jigger |
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Application publication date: 20120704 |