CN101338812A

CN101338812A - Hydraulic generation speed variator

Info

Publication number: CN101338812A
Application number: CNA2008100223945A
Authority: CN
Inventors: 孔霞; 徐哲; 殷学泉
Original assignee: Jiangsu Tailong Decelerator Machinery Co Ltd
Current assignee: Jiangsu Tailong Decelerator Machinery Co Ltd
Priority date: 2008-07-14
Filing date: 2008-07-14
Publication date: 2009-01-07
Anticipated expiration: 2028-07-14
Also published as: CN100575741C

Abstract

The present invention discloses a hydroelectricity-generating speed change gear, which comprises a case body, a high-speed shaft, a central gear, a planetary gear train, a planet carrier, an internal gear, an external gear, a low-speed shaft, a left holed cover and a right holed cover; wherein, the high-speed shaft is connected with the central gear by a floating internally geared sleeve; the external gear is fixed on the case body; the internal gear is connected with the external gear in a floating way. By enlarging the gap of the internal gear and the plastic deformation of the floating internally geared sleeve, the load among planetary gears is equalized, and therefore the performance index and efficiency of the speed change gear is greatly increased. The case body is composed of an upper case body and a lower case body which are combined together after casting steel parts and steel plates are welded together to form the upper and the lower case bodies, and therefore assembly and maintenance become convenient, which is favorable for assembly, adjustment and on-spot mounting and overhaul. A middle oil-spraying hole is arranged on an oil-spraying spherical cap arranged between the central gear and the low-speed shaft, and lubricant oil can flow to the engaged place of the floating internally geared sleeve through the central hole of the central gear, thus improving lubricating conditions and greatly increasing engaging precision. The high-speed shaft and the low-speed shaft are added with a non-contact sealing unit, which reduces the friction of a framework oil seal while ensuring that oil cannot seep from the ends of the shafts.

Description

Hydraulic generation speed variator

Technical field

The present invention relates to a kind of speed change gear, especially a kind ofly be used for hydroelectric speed change gear.

Background technique

The hydroelectric power system device is made up of water turbine, speed change gear and generator three parts, own noise of water turbine and generator and vibration are bigger, want to reduce the noise and the vibration of whole system, the noise of speed change gear and vibration must be controlled in the small range.Improve the speed change gear mechanical efficiency simultaneously, can improve the hydroelectric power overall system efficiency, effectively reduce hydroelectric cost.Therefore how on hydroelectric installation, to improve the efficient of speed change gear, reduce temperature rise and noise, reduce oil seepage phenomena and become the problem that hydroelectric power industry engineers is paid close attention to.

At present, hydroelectric speed change gear gear-box generally adopts transmission of parallel-axes gears speedup or NGW planetary pinion speed booster driving mechanism.Speed increasing ratio is less than 4 general employing parallel axis hard-tooth surface gear transmission, and speed increasing ratio is greater than 4 general employing NGW planetary pinion transmission.But traditional NGW planetary type gear transmission unit, single-stage generally only adopts sun gear to float, twin-stage or three grades adopt sun gear and planet carrier combination to float, because the disequilibrium of manufacturing tolerance and carrier member, cause actual floating load balancing effect not ideal, cause mechanical efficiency generally only to reach 94%, noise 85dB (A), vibration values≤0.08mm.The NGW planetary type gear transmission unit housing of transmission generally adopts the integrated type casting, because the speed change gear scene of using generally is in the remote mountains area, limited by operating mode and appointed condition, and maintenance is installed in integral housing assembling and setting and on-the-spot lifting, and renewal part is extremely inconvenient.The NGW planetary type gear transmission unit of transmission generally adopts bath lubrication, and churning loss is big, and each point of mesh lubrication effect is not ideal, cause thermal power to rise, the complete machine temperature rise is higher, generally reaches 60 ℃, gear mesh efficiency reduces simultaneously, thus the corresponding reduction of complete machine mechanical efficiency.Speed change gear generally adopts oil sealing sealing, and oil sealing is an easily damaged parts, in case the oil sealing wearing and tearing produce seepage oil, limited by field condition, changes very difficulty of oil sealing.

Summary of the invention

The objective of the invention is at the required speed change gear of present hydroelectric power industry, noise is big, vibration is big, efficient is not high, the practical problem of leakiness oil impregnate, debugging inconvenient maintenance, and a kind of hydraulic generation speed variator is provided.

The technical solution used in the present invention is: this device comprises casing, high speed shaft, sun gear, planetary gear train, planet carrier, internal gear, external gear, lower velocity shaft, left and right logical lid, technical characteristics is to connect through the internal tooth casing that floats between high speed shaft and the sun gear, external gear is fixed on the casing, and internal gear floats with external gear and is connected.

Described internal gear is by the inside and outside baffle plate axial limiting that is installed on the external gear; Described casing is formed by connecting through bolt by upper and lower casing; Be axially arranged with the center nozzle opening on the oil spout ball top between described sun gear and the lower velocity shaft; The shaft end seal place of described high speed shaft and lower velocity shaft is provided with disc and oil baffle disc respectively, disc and oil baffle disc and about logical cover non-contact and seals.

After adopting above technological scheme, the beneficial effect that the present invention reaches is:

(1) adopt sun gear to float and the unsteady combined mechanism of internal gear, by increasing the plastic deformation of internal gear gap and unsteady tooth cover, make the load equalization between each planet wheel, improve the performance index of speed change gear greatly, the single-stage mechanical efficiency reaches 99.5%, temperature rise 30K, noise 75dB (A), vibration values≤0.03mm.

(2) casing is updated to upper and lower casing by the cylinder integrated type of conventional cast and adopts Cast Steel and steel plate soldering group box-like, and installation and maintenance are convenient, is convenient to assembling and setting and on-the-spot maintenance is installed.

(3) the center nozzle opening is set up on the top of the oil spout ball between sun gear and the lower velocity shaft, make circulating lubricating oil arrive the tooth cover engagement place of floating by the sun gear center hole, improved the lubricating condition of unsteady tooth cover greatly, make the unsteady tooth cover accuracy of mesh improve greatly, guarantee that sun gear floating load balancing effect is better.

(4) high speed shaft, lower velocity shaft have increased the noncontact seal device, reduce the friction of outside framework oil seal, guarantee that axle head does not leak oil impregnate.

Description of drawings

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the right elevation of Fig. 1.

Among the figure: high speed shaft 1, disc 2, oil sealing 3, a left side is logical covers 4, left shaft holder 5, last tank wall 6, external gear 7, planet axis 8, planet wheel 9, sun gear 10, planet carrier 11, oil spout ball top 12, right bearing seat 13, oil-feed spacer 14, oil sealing 15, right leading to covers 16, oil baffle disc 17, lower velocity shaft 18, upper box 19, lower box 20, internal gear 21, following tank wall 22, the internal tooth casing 23 that floats, back-up ring 24, internal baffle 25, spray bar 26, center oilhole 27, exterior siding 28.

Embodiment

Accompanying drawing discloses the concrete structure of an embodiment of the present invention without limitation, and the invention will be further described below in conjunction with accompanying drawing.

In Fig. 1,2, the present invention includes upper box 19, lower box 20, high speed shaft 1, the internal tooth casing 23 that floats, sun gear 10, planet wheel 9, external gear 7, internal gear 21, oil spout ball top 12, lower velocity shaft 18.Wherein: high speed shaft 1 floats by the internal tooth casing 23 that floats with sun gear 10 and is connected, and

internal gear

21 and 7 unsteady connections of external gear are spacing by the internal baffle 25, the exterior siding 28 that are connected on the external gear, make up to realize that sun gear floats and internal gear floats.Casing is made up of upper box and lower box two-part, upper box 19 is to combine by last tank wall 6 and

left shaft holder

5,13 welding of right bearing seat, lower box is to combine by following tank wall 22 and left shaft holder, the welding of right bearing seat, and tank wall is the steel plate weldment, and bearing support is a Cast Steel.This structure adopts Lubricating-oil Station circulating lubrication, and lubricant oil is leaded up to oil-feed spacer 14 and is transported to bearing place on the planet wheel 9 through the planet axis 8 on the planet carriers 11, and two oil sealings 15 are housed on the oil-feed spacer, prevents oil seepage, reduces oil pressure; Another road lubricant oil is sprayed onto the sun gear center hole by the center nozzle opening 27 on oil spout ball top 12, again by the extremely unsteady internal tooth casing engagement place of the hole oil spout of back-up ring 24; Sun gear, planet wheel are by spray bar 26 oil jet lubrications that are welded on the planet carrier.The sealing of high speed axle head is to be used in combination by disc 2 and oil sealing 3, realizes disc 2 and the left logical 4 non-contacts sealing of covering; The sealing of low speed axle head is logically cover 16 and be used in combination the realization noncontact seal with right by oil baffle disc 17.

During concrete enforcement, the combined mechanisms of should guaranteeing that sun gear 10 floats and internal gear 21 floats, gap by increasing gear and the plastic deformation of tooth cover make the load equalization between each planet wheel.

Claims

1, a kind of hydraulic generation speed variator, mainly comprise casing, high speed shaft (1), sun gear (10), planetary gear train, planet carrier (11), internal gear (21), external gear (7), lower velocity shaft (18), left and right logical lid (4) (16), it is characterized in that: connect through the internal tooth casing (23) that floats between high speed shaft (1) and the sun gear (10), external gear (7) is fixed on the casing, and internal gear (21) floats with external gear (7) and is connected.

2, hydraulic generation speed variator according to claim 1 is characterized in that: described internal gear is by inside and outside baffle plate (25) (28) axial limiting that is installed on the external gear.

3, hydraulic generation speed variator according to claim 1 is characterized in that: described casing is formed by connecting through bolt by upper and lower casing (19) (20).

4, hydraulic generation speed variator according to claim 1 is characterized in that: be axially arranged with center nozzle opening (27) on the oil spout ball top (12) between described sun gear (10) and the lower velocity shaft (18).

5, hydraulic generation speed variator according to claim 1, it is characterized in that: the shaft end seal place of described high speed shaft (1) and lower velocity shaft (18) is provided with disc (2) and oil baffle disc (17) respectively, disc and oil baffle disc and left and right logical lid (4) (16) non-contact sealing.