CN2213254Y - Hydraulic torque conversion device - Google Patents

Abstract

The utility model relates to a hydraulic torque conversion device which belongs to hydraulic machinery and is composed of a pump wheel, a turbine, a guide wheel, a pump wheel tray, a safety valve, an adjusting valve, etc. The utility model has the constructional characteristics that the angular difference values of inlets and outlets of the pump wheel and turbine blade grids are greater than that of the similar products in the prior art; the end face of a connecting disk is made into an inward cone bevel; the bandwidth of an overflow band in a no blade zone at the upper section of a turbine circulating circle and the assembly clearances of a valve core of the adjusting valve and the opening part of a valve body are smaller than that of the similar products in the prior art; the lengths of the sealing surfaces of a valve body and a valve core of the safety valve are increased. Because of the changes of parts, the performance of the utility model is superior to that of the similar products in the prior art.

Description

Hydraulic torque conversion device

The utility model is a kind of fluid torque converter, belongs to hydraulic machine.

The existing Japanese LTT220 of Komatsu fluid torque converter, in use there are the following problems: it is less that 1) fluid torque converter pump impeller, turbine cascade are imported and exported angle difference, as pump impeller leaf grating outer shroud import and export differential seat angle be 31 ° 57 ', interior ring import and export differential seat angle be 61 ° 19 '; The turbine cascade outer shroud import and export differential seat angle be 147 ° 50 ', interior ring import and export differential seat angle be 164 ° 50 '; Because it is less that the pump impeller leaf grating is imported and exported angle difference, can not improve thousand commentaries on classics and can hold M _Bg, the hauling ability of complete machine can not be increased; It is little that turbine cascade is imported and exported angle difference, makes the blade profile tortuosity less, and then the turbine moment of torsion is also little, so the zero-speed bending moment is counted K ₀Be worth not high, therefore, its K ₀Value, M _BgAspects such as value and efficiency eta value, the potentiality that are improved.2) land 20(sees also shown in Figure 8), when overall work, working oil enters output shaft 18 cylindricals by bearing 17, because of output shaft 18 rotates, working oil on the cylindrical is through rotation, be splashed to land 20 outer round surface shown in Fig. 8 arrow, leak into machine outside, formed the exosmose phenomenon of leakage of oil of complete machine through backbone sealing ring 19.3) not have leaf district outside overflow band A be 2 mm wides to turbine circulate circle epimere, this is with broad, when machine works, pump impeller 10 high speed rotating are sent into working oil in the turbine 8 of rotation, and the working oil flow direction is shown in Fig. 4 arrow, simultaneously because action of centrifugal force, make the working oil that does not enter work done in the turbine 8 as yet, do not have the leaf district overflow band A from circulate circle and overflow, influenced service behaviour.4) valve body of modulating valve, a spool unlatching mouthful fit up gap B are 4 ± 0.3 millimeters, because this gap B is bigger, and the time decreased that working oil is detained in the torque-converters active wheel, then K ₀And M _BG can not improve.5) safety valve valve body and valve core sealed cover length are shorter, and sealability is relatively poor, and working oil easily leaks out from sealing surface, enters housing through spill port.The above problem of Cun Zaiing is to the K of fluid torque converter ₀Value, M _BgRaisings such as value and η value are affected.

In order to overcome the problem of above-mentioned existence, the purpose of this utility model is to improve K ₀, M _BgAnd η equivalence, need the pump impeller to prior art, change, the improvement of land end face, the circulating ring epimere of turbine cascade import and export differential seat angle not to have the variation of leaf district outside overflow band, modulating valve valve body and the adjustment in spool unlatching mouthful gap and the variation of safety valve valve body and valve core sealed cover length etc., therefore designed fluid torque converter of the present utility model.

In order to realize above-mentioned purpose, the utility model takes following measure to realize: the utility model is a kind of fluid torque converter, connects dish and safety valve, modulating valve are formed by pump impeller, turbine, guide wheel, pump impeller.On the basis of existing technology: increase pump impeller, turbine cascade import and export angle difference, can improve thousand commentaries on classics and can hold M _Bg, the hauling ability of complete machine is strengthened greatly; Turbine cascade is imported and exported the increase of angle difference, makes the blade profile tortuosity big, and the degree of turning round during liquid stream process turbine is big, can obtain bigger turbine moment of torsion, has improved the zero-speed bending moment and has counted K ₀Value is through output shaft output (but the bending that can not too strengthen turbine blade, otherwise transmission efficiency is descended).The end face of land is made to the inner cone inclined-plane, makes the working oil on the output shaft cylindrical, has changed to get rid of oily direction, has avoided the phenomenon of the outer seepage of working oil effectively.The circulating ring epimere does not have leaf district outside overflow band A and reduces; When machine works, the pump impeller high speed rotating is sent into working oil in the turbine of rotation, because action of centrifugal force, makes not enter turbine and the working oil of work done not, do not have the leaf district A from circulating ring and to overflow, then influence service behaviour, after A was reduced, working oil overflow in A was obstructed, thereby make working oil produce a bigger back pressure at pump impeller maximum outside diameter place, send in the turbine section circulate circle leaf grating after forcing a large amount of working oil superchargings, fully work done has improved torque-converters zero-speed bending moment effectively and has counted K ₀Value.Modulating valve valve body and spool are opened reducing of oral area fit up gap B, and working oil holdup time in the torque-converters active wheel is increased relatively, have then improved the degree of filling of working oil in the active wheel, count K thereby improved the zero-speed bending moment ₀Value and pump impeller thousand change can hold M _BgBecause prior art sealing surface length is shorter, sealability is relatively poor, and working oil easily leaks out from sealing surface, enters housing through spill port; So the length L of safety valve valve body and valve core sealed cover is increased, then working oil is difficult for leaking out from sealing surface, makes working oil as much as possible enter active wheel through oil inlet hole, participates in work done, counts K thereby improved the zero-speed bending moment ₀Thousand commentaries on classics can be held M with pump impeller _BgThe outer shroud inlet angle β of pump impeller leaf grating _1rWith exit angle β _2rDifferential seat angle be 34 ° 27 '-35 ° 57 ', best angle is 35 ° 10 ' interior ring inlet angle β _1BWith exit angle β _2BDifferential seat angle be 64 ° 19 '-65 ° 49 ', its best angle be 65 ° 14 '.The outer shroud inlet angle β of turbine cascade _1rWith exit angle β _2rDifferential seat angle be 152 ° 50 '-156 ° 20 ', best angle be 155 ° 50 ', ring inlet angle β in it _1BWith exit angle β _2BDifferential seat angle be 168 ° 50 '-172 ° 20 ', best angle is 171 °.Secondly, the driving gear of this fluid torque converter, land, wheel stand, dump pump, main driven gear assembly, materials such as output shaft, guide wheel seat ring are selected the alloyed steel of easily purchasing for use, adopt gas plasma and nitrocarburizing surface heat to handle, make its part surface hardness height, advantages such as compression chord fatigue behaviour intensity and good toughness make its wear resistance good, the operation noise is little, steady quality has been eliminated phenomenons such as cracked, hardness inequality, distortion.

The utility model compared with prior art, its advantage:

1. performance parameter has had raising, and the zero-speed bending moment is counted K ₀Can reach more than 2.40, complete machine driving power under the state of zero-speed or low speed is improved greatly, thousand commentaries on classics can be held M _BgCan reach more than the 273N.m, the haulage capacity when making the complete machine proper functioning improves, and efficiency eta 〉=0.89 is improved the power utilization of motor simultaneously.

2. reduce internal leakage, eliminated external leakage.

3. the working oil degree of filling increases in the active wheel, thereby has improved performance parameter.

The utility model can also obtain further instruction from the following drawings and embodiment:

Fig. 1 is vertical cross-sectional schematic of the utility model fluid torque converter.

Fig. 2 is the utility model pump impeller cascade configuration schematic representation.

Fig. 3 is the utility model turbine cascade profile schematic representation.

Fig. 4 is the local vertical cross-sectional schematic of turbine of amplifying in Fig. 1 D place.

Fig. 5 is the vertical cross-sectional schematic of the utility model modulating valve.

Fig. 6 is the vertical cross-sectional schematic of the utility model safety valve.

Fig. 7 is the local vertical cross-sectional schematic of land of amplifying in Fig. 1 E place.

Fig. 8 is the vertical cross-sectional schematic of land of prior art.

The drawing explanation:

1-pump impeller leaf grating, 2-turbine cascade, 3, the 17-bearing, 4, the 18-output shaft, 5, the 20-land, 6-lid, the 7-wheel stand, the 8-turbine, the 9-pump impeller connects dish, 10-pump impeller, 11, the 14-spool, 12,13-valve body, 15-spill port, 16-oil inlet hole, 19-backbone sealing ring, K ₀-zero-speed bending moment number, M _Bg-thousand commentaries on classics can be held A-bandwidth, B-fit up gap, α-awl inclined-plane angle, the length of L-safety valve valve body and valve core sealed cover.

Below by accompanying drawing embodiment of the present utility model is described in detail:

The utility model is a kind of fluid torque converter, connects dish, output shaft, dump pump, gear, safety valve, modulating valve by pump impeller, turbine, guide wheel, pump impeller and is formed.Its structural feature is: the outer shroud inlet angle β of pump impeller leaf grating 1 _1rWith exit angle β _2rDifferential seat angle be 35 ° 10 '; Interior ring inlet angle β _1BWith exit angle β _2BDifferential seat angle be 65 ° 14 '; The outer shroud inlet angle β of turbine cascade 2 _1rWith exit angle β _2rDifferential seat angle be 155 ° 50 ', ring inlet angle β in it _1BWith exit angle β _2BDifferential seat angle be 171 °; Experiment showed, fluid torque converter of the present utility model, because above-mentioned pump impeller and turbine cascade are imported and exported the increase of differential seat angle, its K ₀Value, M _BgValue and aspect such as efficiency eta value are above the like product of Japanese Komatsu.The end face of land 5 make to the inner cone inclined-plane be 12 the degree to 17 the degree, the best be 15 the degree; Make the working oil on output shaft 4 cylindricals, changed and got rid of oily direction, shown in Fig. 7 direction of arrow, throw away in the housing, avoided the phenomenon of the outer seepage of working oil effectively.It is that turbine external diameter 8 and pump impeller connect that bandwidth A is 1.25 millimeters between dish 9 endoporus that turbine circulating ring epimere does not have leaf district outside overflow band A, because A is littler than prior art, send in the turbine section circulate circle leaf grating after forcing a large amount of working oil superchargings, fully work done has improved torque-converters zero-speed bending moment effectively and has counted K ₀Value, this K ₀Value is greater than the K value of prior art, so this fluid torque converter is better than existing like product.It is 3 ± 0.3 millimeters (consulting shown in Figure 5) that modulating valve valve body 12 and spool 11 are opened fit up gap B, because the B=3 ± 0.3 millimeter B less than Japanese model machine ₁=4 ± 0.3 millimeter, long 7 ± 0.1 millimeters because of being distributed with 6 on spool 11 circumference again, wide 8 millimeters skewed slot, B contracts to 3 ± 0.3 millimeters, the fuel-displaced back pressure of modulating valve is improved, so the time that working oil is detained in the torque-converters active wheel increases relatively, has improved the degree of filling of working oil in the active wheel, thereby has improved K ₀And M _BgValue.Safety valve valve body 13 and spool 14 sealing surface length L are 14 millimeters, it increases (as shown in Figure 6) than the valve body of prior art and the sealing surface length of spool, the length of sealing surface owing to extended, make working oil be difficult for leaking out from sealing surface, make working oil as much as possible enter active wheel through oil inlet hole 16, participate in work done, thereby improved K ₀And M _BgValue.

Claims (2)

1, a kind of fluid torque converter connects dish and safety valve, modulating valve are formed by pump impeller, turbine, guide wheel, pump impeller, it is characterized in that:

A. the outer shroud inlet angle β of pump impeller leaf grating (1) _1rWith exit angle β _2rDifferential seat angle be 34 ° 27 '-35 ° 57 ', best angle be 35 ° 10 ', interior ring inlet angle β _1BWith exit angle β _2BDifferential seat angle be 64 ° 19 '-65 ° 49 ', its best angle be 65 ° 14 ';

B. the outer shroud inlet angle β of turbine cascade (2) _1rWith exit angle β _2rDifferential seat angle be 152 ° 50 '-156 ° 20 ', best angle be 155 ° 50 ', ring inlet angle β in it _1BWith exit angle β _2BDifferential seat angle be 168 ° 50 '-172 ° 20 ', best angle is 171 °;

C. the end face of land (5) is made to the inner cone inclined-plane;

D. outside turbine (8) and pump impeller connect circulate circle epimere between the dish (9) not have leaf district outside overflow bandwidth A be 1.25 millimeters;

E. spool of modulating valve (11) and valve body (12) unlatching oral area fit up gap B is 3 ± 0.3 millimeters;

F. valve body of safety valve (13) and spool (14) sealing surface length L are 14 millimeters.

2, fluid torque converter according to claim 1 is characterized in that: land (5) end face is that 12 degree are to 17 degree to the inner cone inclined-plane; The best is 15 degree.

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