CN1793692A - Vertical high speed primary gear speed reducing box - Google Patents
Vertical high speed primary gear speed reducing box Download PDFInfo
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- CN1793692A CN1793692A CNA2006100111851A CN200610011185A CN1793692A CN 1793692 A CN1793692 A CN 1793692A CN A2006100111851 A CNA2006100111851 A CN A2006100111851A CN 200610011185 A CN200610011185 A CN 200610011185A CN 1793692 A CN1793692 A CN 1793692A
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- high speed
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Abstract
The invention is a vertical high speed primary gearbox, relating to the field of design technique of reduction gear of a high temperature gas-cooled reactor generating system with direct helium gas turbine cycle, characterized in that it comprises: box body, high speed gear shaft extending from the bottom of the box body into it, and low speed shaft parallel with the high speed gear, where the low speed shaft engages with the high speed gear shaft through a low speed gear with a radius greater than that of the gear of the high speed gear shaft, the high speed gear shaft is fixed with the box body through two sliding bearings, and the low speed shaft is fixed with the box body through two thrust bearings; the box body is provided with sealing device and lubricating system. The invention is simple in structure, and convenient to install, and reduces device manufacturing expenses because of avoiding the use of high speed electric motor and inverter in the system.
Description
Technical field
Vertical high speed primary gear speed reducing box relates to the speed reducer design of the direct cycle generating system of high-temperature gas-cooled reactor helium gas turbine
Technical field.
Background technique
In the direct cycle generating system of high-temperature gas-cooled reactor helium gas turbine, energy conversion unit comprises turbine power generation unit, heat transmission equipment and accessory.The turbine power generation unit is made up of helium gas turbine gas compressor, speed reducer, synchronous machine.Speed reducer is one of core apparatus of energy conversion unit, is to realize the key equipment of nuclear energy to the electric energy conversion.The reliability and security of this equipment is related to the normal operation of the direct cycle generating system of high-temperature gas-cooled reactor helium gas turbine.
Rankine cycle (Rankine Cycle) steam turbine generation system is all adopted in high temperature gas cooled reactor prototype research reactor of having built in the world and demonstration power station, and such system is made up of two heating power loops, and steam generator transmits heat between two loops.Its working principle is as follows: a loop helium flow is heated in the time of cooled reactor through reactor core; The high temperature helium flow is given the water/water vapor of opposite side heat delivered through steam generator one side; By the cooled helium of steam generator, by the pressurization of helium blower, flow into reactor core, form a circuit cycle.In the secondary circuit, the water vapor that steam generator produces enters steam turbine expansion acting; The steam turbine exhaust steam device that is cooled is condensed into water, after the high-pressure water pump pressurization, sends into steam generator, forms the secondary circuit circulation.Steam turbine generation has reduced the quality of the energy that high temperature nuclear reactor provides, generating efficiency not high (being lower than 40%), and system complex causes equipment investment higher.
The developing direction of high temperature gas cooled reactor is to adopt the direct circulating generation of helium gas turbine of Bradenton circulation (Brayton Cycle), and theoretical efficiency is near 50%.Working principle is as follows: high-pressure helium is flowed through and is entered the turbine expansion acting after reactor core is heated, and heat energy is converted into the turbine rotating mechanical energy, drives generator for electricity generation and also drives the gas compressor compressed helium simultaneously; The turbine tail gas stream is given the cold helium in high pressure side with heat delivered after the regenerator low voltage side, enter precooler then and lowered the temperature; The low-temp low-pressure helium is compressed into high-pressure helium after having the unit of calming the anger of inter cooler, the regenerator high pressure side of flowing through is preheated, and then enters reactor core and be heated, and finishes whole circulated helium.In the turbine power generation unit, turbo compressor guarantees its efficient to optimize the rotating speed operation, generator speed and mains frequency are consistent, and speed reducer is reduced to the horizontal output of electrical network rated frequency to rotor with input end turbo compressor rotating speed, transmits the turbine shaft work simultaneously.Speed reducer is critical component in the energy conversion unit.
Because the helium gas turbine output speed than higher, be 15000rpm, and the rated speed of common generator has only 3000rpm, therefore can not be tied by the rotor turbine output shaft is direct and generator.Use gear-box, the output speed of helium gas turbine is reduced to 3000rpm earlier, the output terminal and the generator amature of gear-box is tied, can guarantee the generator proper functioning.If do not adopt speed reducer, just must use high-speed electric expreess locomotive.The manufacture difficulty of high-speed electric expreess locomotive is big, and the frequency of generating frequency and normal electrical network is inconsistent, needs frequency modulation equipment, and these all can increase research difficulty and device fabrication expense.
Because high temperature gas cooled reactor adopts in harness arrangement, promptly pressure vessel and energy conversion unit are arranged in juxtaposition.Adopt this in harness structure, all must adopt vertical layout between helium gas turbine, speed reducer and the generator.Market survey is found all high speed gear reducers all are that horizontal type structure arranges that not seeing has vertical structure at present.
The transmission of speed reducer has planetary pinion transmission, one-level spur gear and helical gear transmission, multistage song to return the formula transmission.The present invention adopts one-level helical gear deceleration transmission, and it is simple in structure, and is easy for installation, and manufacturing expense is relatively low.
Summary of the invention
The objective of the invention is to, a kind of vertical and high-speed speed reducer of the high temperature gas cooled reactor that can be used for arranging shoulder to shoulder is provided, this speed reducer can solve the direct circulation time of high-temperature gas-cooled reactor helium gas turbine speed is reduced to the problem of conventional generator rated speed and the sealing problem that vertical layout brought.
The invention is characterized in, it contains: casing, stretch into the high speed gear shaft (5) of casing from described casing lower end, the lower end of this high speed gear shaft (5) connects the turbine output shaft, also contain a lower velocity shaft (7) parallel with described high speed gear shaft (5), this lower velocity shaft (7) is by the low speed gear (6) and described high speed gear shaft (5) engagement of a radius greater than described high speed shaft gear (5) radius, and the upper end of described lower velocity shaft (7) is stretched out casing and linked to each other with generator amature; Described high speed gear shaft (5) is fixed with described casing by first sliding bearing (8) and second sliding bearing (9), and described lower velocity shaft (7) is fixed with described casing respectively by first thrust-bearing (11) and second thrust-bearing (12); The lower end of described high speed gear shaft (5) and lower velocity shaft (7) all is fixed on the dunnage (20); The upper end of stretching out casing place, lower velocity shaft (7) in described high speed gear shaft (5) lower end is stretched out the casing place all the seal arrangement that prevents oil leakage; Lubrication system also is housed, oil inlet pipe of installing on this lubrication system connect box (18) and return tube (19) in described casing.
Profile of tooth on the described high speed gear shaft (5) is divided into two sections, is helical gear, and two sections profile of tooth direction is opposite; Profile of tooth on the described low speed gear (6) also be divided into two sections respectively with described high speed shaft (5) on profile of tooth engagement.
The seal arrangement that the casing place is stretched out in the upper end of described lower velocity shaft (7) is labyrinth gland (14).
The seal arrangement that the casing place is stretched out in the lower end of described high speed gear shaft (5) contains the flinger ring (16) of a projection that is positioned at the casing through hole top of passing through for high speed gear shaft (5), with be fixed on the described high speed gear shaft (5), be positioned at a disc (15) of described flinger ring (16) top, described dunnage (20) separates described lower box becomes a fuel reserve tank (4).
Described lubrication system contains near the spray bar (17) that is positioned at described high speed gear shaft (5) and described low speed gear (6) the engagement position, and to the pipeline (21) of described first sliding bearing, second sliding bearing (9), first thrust-bearing (11) and second thrust-bearing (12) fuel feeding.
Evidence, vertical speed reducer used in the present invention can be reduced to 3000 rev/mins effectively with 150000 rev/mins of rotating speeds, and guarantees sealing effect, and lubricant oil and oil gas in the casing can not leak into outside the speed reducer; Adopt one-level helical gear deceleration transmission, it is simple in structure, and is easy for installation, has avoided using high-speed electric expreess locomotive and frequency variator in system, greatly reduces the manufacturing expense of equipment, has reached its intended purposes.
Description of drawings
Fig. 1 is a speed reducer casing schematic representation.
Fig. 2 is the speed reducer sectional drawing.
Fig. 3 is a speed reducer high speed gear shaft lower end sealed structural representation.
Fig. 4 is a gear-box spray bar key plan.
Embodiment
Vertical type high speed gear reducer provided by the invention is vertical layout, and casing has complete sealing configuration; The input end speed of its high speed shaft can reach 18000 rev/mins, and its reduction speed ratio is 5: 1; Speed reducer comprises casing, high speed gear shaft, lower velocity shaft, low speed gear, bearing arrangement, 6 parts of sealing system.The speed reducer casing comprises 3 parts: preceding half chests body, later half casing, three parts of lower supporting plate.High speed gear shaft is a complete axle, and profile of tooth is processed on axle, profile of tooth in separated so that cooperate tightr between the high speed transmission process middle gear.Gear adopts helical gear, and the helical teeth direction of two sections profiles of tooth is opposite, and the axial force that produces in the engagement process is cancelled out each other.Lower velocity shaft and low speed gear are assembled together with the pattern of interference fit.All be separately installed with watt (thrust) bearing that to incline at the two ends of high speed shaft and lower velocity shaft, have 4 covers.In the lower end, high speed shaft passes the position perforate of casing lower supporting plate, and seal arrangement is installed, and guarantees that lubricant oil can not leak out from below.In the upper end of lower velocity shaft, the mazy type mechanical seal structure is installed, prevent that lubricant oil from leaking out from the upper end of lower velocity shaft.
Describe the present invention in detail below in conjunction with accompanying drawing.
Speed reducer of the present invention comprises casing, high speed gear shaft, lower velocity shaft, low speed gear, bearing arrangement, 6 parts of sealing system by speed reducer, and concrete structure is seen Fig. 1～Fig. 4.
The structure of casing such as Fig. 1 and Fig. 2, Fig. 1 are the speed reducer side view, and Fig. 2 is the speed reducer plan view.For ease of installation and removal, housing structure is divided into 3 parts, preceding half chests body 1, later half casing 2,3 three parts of lower supporting plate.By Bolt Connection, preceding half chests body 1 and later half casing 2 all are installed on the lower supporting plate 3, have bolt hole on the lower supporting plate 3, whole speed reducer can be fixed on the mounting point between preceding half chests body 1 and the later half casing 2.Before half chests body 1 and later half casing 2 itself have an enclosed construction of one's own, promptly at the bottom of the case 3 and a dunnage 20 of box house certain distance is arranged, this space has constituted fuel reserve tank 4.
The internal structure of speed reducer is seen Fig. 2.High speed gear shaft 5 is complete axles, and profile of tooth is processed on axle, profile of tooth in separated so that cooperate tightr between the high speed transmission process middle gear.The direction of high speed gear shaft 5 is perpendicular to the ground direction.The lower end of high speed shaft 5 reaches outside the casing, links with the turbine output shaft.Lower velocity shaft 7 is assembled together with the pattern of low speed gear 6 with interference fit.They and high speed gear shaft 5 are arranged in parallel, low speed gear 6 meshes together with high speed gear shaft 5, and high speed gear shaft 5 drives low speed gear 6 and rotates, because the gear number of teeth on the high speed gear shaft 5 is few, the number of teeth of low speed gear 6 is many on the lower velocity shaft 7, therefore high speed rotating speed can be reduced.Lower velocity shaft 7 rotates with low speed gear 6, and therefore, the speed of lower velocity shaft 7 outputs also reduces.
At the two ends of high speed gear shaft 5, be fixed on the casing by first high-speed bearing 8 and second high-speed bearing 9.The outer ring of high-speed bearing is fixed on the casing, transfixion, and inner ring is fixed on high speed gear shaft 5, rotates with high speed gear shaft 5.Terminal on high speed gear shaft 5, end cap 10 is installed, its effect is sealing high speed gear shaft 5 upper ends, prevents that lubricant oil from leaking out from here.
Two bearings, first thrust-bearing 11 and second thrust-bearing 12 also are installed at the two ends of lower velocity shaft 7, and thrust-bearing rotor and lower velocity shaft 7 are fixed together and rotate with axle, and stator is fixed on the casing.End is equipped with to seal to lead to and covers 13 on lower velocity shaft 7, and logical lid of sealing is equipped with general labyrinth seal structure 14 in 13, and its effect is to prevent that lubricant oil is outside this leaks into speed reducer.
Fig. 3 is seen in the sealing of high speed gear shaft lower end, and Fig. 3 is the partial enlarged drawing of high speed shaft lower end sealing.Pass the position of lower supporting plate 3 at high speed gear shaft 5, flinger ring 16 is installed, its effect is to prevent that lubricant oil from leaking out from the tapping of lower supporting plate 3.Because flinger ring 16 upper ends have through hole so that high speed gear shaft 5 is passed, leak from this tapping for preventing lubricant oil, at the perforate upper end position, disc 15 is installed on high speed gear shaft 5.
The structure of speed reducer lubrication system is seen Fig. 2 and Fig. 4, and Fig. 4 is the plan view of speed reducer.Because the rotating speed of gear is very high, need pressure lubrication at the engagement position.At the engagement position spray bar 17 is installed, oil feed line 21 is installed, oil inlet pipe 18 is installed on the casing at the position of sliding bearing and thrust-bearing.Return tube 19 is installed on lower supporting plate 3, lubricant oil is drawn from speed reducer.
Claims (5)
1, vertical high speed primary gear speed reducing box, it is characterized in that, it contains: casing, stretch into the high speed gear shaft (5) of casing from described casing lower end, the lower end of this high speed gear shaft (5) connects the turbine output shaft, also contain a lower velocity shaft (7) parallel with described high speed gear shaft (5), this lower velocity shaft (7) is by the low speed gear (6) and described high speed gear shaft (5) engagement of a radius greater than described high speed shaft gear (5) radius, and the upper end of described lower velocity shaft (7) is stretched out casing and linked to each other with generator amature; Described high speed gear shaft (5) is fixed with described casing by first sliding bearing (8) and second sliding bearing (9), and described lower velocity shaft (7) is fixed with described casing respectively by first thrust-bearing (11) and second thrust-bearing (12); The lower end of described high speed gear shaft (5) and lower velocity shaft (7) all is fixed on the dunnage (20); The upper end of stretching out casing place, lower velocity shaft (7) in described high speed gear shaft (5) lower end is stretched out the casing place all the seal arrangement that prevents oil leakage; Lubrication system also is housed, oil inlet pipe of installing on this lubrication system connect box (18) and return tube (19) in described casing.
2, vertical high speed primary gear speed reducing box as claimed in claim 1 is characterized in that, the profile of tooth on the described high speed gear shaft (5) is divided into two sections, is helical gear, and two sections profile of tooth direction is opposite; Profile of tooth on the described low speed gear (6) also be divided into two sections respectively with described high speed shaft (5) on profile of tooth engagement.
3, vertical high speed primary gear speed reducing box as claimed in claim 1 is characterized in that, the seal arrangement that the casing place is stretched out in the upper end of described lower velocity shaft (7) is labyrinth gland (14).
4, vertical high speed primary gear speed reducing box as claimed in claim 1, it is characterized in that, the seal arrangement that the casing place is stretched out in the lower end of described high speed gear shaft (5) contains the flinger ring (16) of a projection that is positioned at the casing through hole top of passing through for high speed gear shaft (5), with be fixed on the described high speed gear shaft (5), be positioned at a disc (15) of described flinger ring (16) top, described dunnage (20) separates described lower box becomes a fuel reserve tank (4).
5, vertical high speed primary gear speed reducing box as claimed in claim 1, it is characterized in that, described lubrication system contains near the spray bar (17) that is positioned at described high speed gear shaft (5) and described low speed gear (6) the engagement position, and to the pipeline (21) of described first sliding bearing, second sliding bearing (9), first thrust-bearing (11) and second thrust-bearing (12) fuel feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100111851A CN1793692A (en) | 2006-01-13 | 2006-01-13 | Vertical high speed primary gear speed reducing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100111851A CN1793692A (en) | 2006-01-13 | 2006-01-13 | Vertical high speed primary gear speed reducing box |
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| Publication Number | Publication Date |
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| CN1793692A true CN1793692A (en) | 2006-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100111851A Pending CN1793692A (en) | 2006-01-13 | 2006-01-13 | Vertical high speed primary gear speed reducing box |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799069A (en) * | 2010-04-15 | 2010-08-11 | 胡炜 | Lubrication system of vertical speed reducer and speed reducer with lubrication system |
| CN101994780A (en) * | 2009-08-10 | 2011-03-30 | 汉森传动系统国际公司 | Parallel gear unit for gearbox for wind turbine |
| CN102330812A (en) * | 2011-08-02 | 2012-01-25 | 邝冠荣 | Novel suspended-type gear speed reducer |
| CN103398164A (en) * | 2013-08-12 | 2013-11-20 | 沃德(天津)传动有限公司 | Air cooling island and vertical type speed reducer thereof |
| CN111779775A (en) * | 2020-07-20 | 2020-10-16 | 方士平 | High-efficient gear engagement transmission scram device |
| CN113236712A (en) * | 2021-05-11 | 2021-08-10 | 中国船舶重工集团公司第七0三研究所 | Single-stage parallel shaft gear transmission device |
-
2006
- 2006-01-13 CN CNA2006100111851A patent/CN1793692A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101994780A (en) * | 2009-08-10 | 2011-03-30 | 汉森传动系统国际公司 | Parallel gear unit for gearbox for wind turbine |
| CN101994780B (en) * | 2009-08-10 | 2015-08-19 | Zf风能安特卫普有限公司 | For the parallel gears unit of wind turbine gear-box |
| CN101799069A (en) * | 2010-04-15 | 2010-08-11 | 胡炜 | Lubrication system of vertical speed reducer and speed reducer with lubrication system |
| CN102330812A (en) * | 2011-08-02 | 2012-01-25 | 邝冠荣 | Novel suspended-type gear speed reducer |
| CN102330812B (en) * | 2011-08-02 | 2014-05-07 | 邝冠荣 | Suspended-type gear speed reducer |
| CN103398164A (en) * | 2013-08-12 | 2013-11-20 | 沃德(天津)传动有限公司 | Air cooling island and vertical type speed reducer thereof |
| CN111779775A (en) * | 2020-07-20 | 2020-10-16 | 方士平 | High-efficient gear engagement transmission scram device |
| CN113236712A (en) * | 2021-05-11 | 2021-08-10 | 中国船舶重工集团公司第七0三研究所 | Single-stage parallel shaft gear transmission device |
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