CN105179229A - External-meshed gear pump and hydrodynamic transmission hydraulic system - Google Patents
External-meshed gear pump and hydrodynamic transmission hydraulic system Download PDFInfo
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- CN105179229A CN105179229A CN201510500482.1A CN201510500482A CN105179229A CN 105179229 A CN105179229 A CN 105179229A CN 201510500482 A CN201510500482 A CN 201510500482A CN 105179229 A CN105179229 A CN 105179229A
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- front case
- gear pump
- middle casing
- housing
- gear
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Abstract
The invention discloses an external-mashed gear pump. The external-mashed gear pump comprises a shell body and a gear mechanism. The gear mechanism is arranged in the shell body and movably connected with the shell body. One end of the gear mechanism is bonded with a hydrodynamic transmission which drives the gear mechanism to rotate in the shell body. The shell body comprises a front shell body, a middle shell body and a rear shell body. A plurality of sealing gaskets are arranged between the front shell body and the middle shell body. A plurality of sealing gaskets are arranged between the middle shell body and the rear shell body. The invention further discloses a hydrodynamic transmission hydraulic system. According to the external-mashed gear pump and the hydrodynamic transmission hydraulic system, the end faces of the shell body are sealed through the sealing gaskets so that the end face gaps of the external-mashed gear pump can be adjusted accurately. Accordingly, the high volume efficiency of the external-mashed gear pump can be obtained, and the using requirement for the service life of the external-mashed gear pump can be met.
Description
Technical field
The present invention relates to hydraudynamic drive technical field, particularly relate to a kind of external gear pump and torque converter hydraulic system.
Background technique
The effect of oil pump in hydraulic automatic speed variator is the hydraulic oil producing certain pressure, for supplying fluid torque converter, executive component, control system and valve body, and needs the component of lubrication to provide lubrication to speed changer inside.The quality of its technology has a significant impact the performance of hydraulic automatic speed variator and working life.
Modal on general hydraulic automatic speed variator is gear pump, rotor pump and vane pump, and most widely used is at present gear pump, but external gear pump common at present has following deficiency:
Under the general low speed of common external gear pump, volumetric efficiency is lower, and cannot at high temperature work for a long time, can not meet the usage requirement of hydraulic automatic speed variator.
Summary of the invention
The embodiment of the present invention is by providing a kind of external gear pump and torque converter hydraulic system, under effectively can solving the general low speed of the common external gear pump of car in prior art, volumetric efficiency is lower, and the technical problem that cannot at high temperature work for a long time, and then meet the demand of hydraulic automatic speed variator to hydraulic oil source.
The embodiment of the present invention, by providing a kind of external gear pump, is applied to a torque converter hydraulic system, and wherein, described torque converter hydraulic system comprises hydraulic system, speed changer and fuel tank, and described external gear pump comprises:
One housing, described housing is fixedly connected with the casing of described speed changer, and the inner chamber of described housing is closed cavity, the side of described inner chamber is provided with force feed mouth, described force feed mouth is connected with described hydraulic system, and the opposite side of described inner chamber is provided with inlet port, and described inlet port is connected with described fuel tank;
One gear mechanism, described gear mechanism is arranged in described housing, and is flexibly connected with described housing, one end of described gear mechanism and described speed changer bonding, and described speed changer drives described gear mechanism to rotate in described housing;
Described housing comprises front case, middle casing and rear case, is provided with several sealing gaskets between described front case and described middle casing, is provided with several sealing gaskets between described middle casing and described rear case.
Further, described gear mechanism comprises:
One driving gear, one end of described driving gear and described rear case active link, the other end of described driving gear by be plugged on described front case with described speed changer bonding;
One driven gear, described driven gear engages with described driving gear, and one end of described driven gear is flexibly connected with described front case, and the other end is flexibly connected with described rear case.
Further, described external gear pump, also comprises:
Needle bearing, described in be arranged on described driving gear and between described front case and rear case, and described driven gear and between described front case and rear case.
Further, gap between described driving gear end face and described housing is: the thickness of described middle casing adds the thickness of the described sealing gasket between described front case and described middle casing, add the described sealing gasket thickness between described middle casing and described rear case, then deduct the thickness of described driving gear;
Gap control between described driving gear end face and described housing is at 0.05mm ~ 0.1mm.
Further, gap between described driven gear end face and described housing is: the thickness of described middle casing adds the thickness of the described sealing gasket between described front case and described middle casing, add the described sealing gasket thickness between described middle casing and described rear case, then deduct the thickness of described driven gear;
Gap control between described driven gear end face and described housing is at 0.05mm ~ 0.1mm.
Further, the radial clearance between the tooth top of described driving gear and described middle casing controls at 0.005mm ~ 0.075mm;
Radial clearance between the tooth top of described driven gear and described middle casing controls at 0.005mm ~ 0.075mm.
Further, described external gear pump, also comprises:
Locating stud, described locating stud is plugged on described front case, middle casing and rear case.
Further, described front case and described rear case are equipped with bearing mounting hole, described needle bearing is arranged in described bearing mounting hole;
The outer ring, border of described front case is provided with tapped hole, and described front case is fixedly connected with described speed changer by described tapped hole.
Further, be provided with seam outside described front case, described seam is for ensureing the abutting joint precision of described front case and described speed changer.
Another aspect provides a kind of torque converter hydraulic system, comprise external gear pump described above.
The one or more technological schemes provided in the embodiment of the present invention, at least there is following technique effect or advantage: owing to adopting the structural design of sealing gasket sealing, both by changing quantity fine adjustment gear mechanism end face and the front case of sealing gasket, gap between middle casing and rear case, filler opening and oil outlet O type circle sealing configuration requisite space can be saved again, make external gear pump provided by the invention under guarantee high volume efficiency prerequisite, effectively solve the large and usage requirement that cannot work long hours under high temperature (> 80 DEG C) of external gear pump pump volume, and then meet the demand of hydraulic automatic speed variator to hydraulic oil source.
Accompanying drawing explanation
The structural representation of the external gear pump that Fig. 1 provides for the embodiment of the present invention one;
The A-A face sectional view that Fig. 2 is the external gear pump shown in Fig. 1;
Force feed mouth on the front case that Fig. 3 is the external gear pump shown in Fig. 1 and the structural representation of inlet port;
Force feed mouth on the rear case that Fig. 4 is the external gear pump shown in Fig. 1 and the structural representation of inlet port.
Embodiment
For general external gear pump, volumetric efficiency under the slow-speed of revolution is relatively low, along with the rising volumetric efficiency of rotating speed constantly raises, and for hydraulic automatic speed variator, under the low speed, need to realize the lubrication of planetary transmission, torque-converters compensates the various functions such as cooling and gearshift, the fluid therefore needed is more, the requirement of the present invention by providing following external gear pump can meet the hydraulic automatic speed variator slow-speed of revolution high volumetric efficiency.
In order to better understand technique scheme, below in conjunction with Figure of description and concrete mode of execution, technique scheme is described in detail.
Embodiment one
As Figure 1-4, a kind of external gear pump that the embodiment of the present invention provides, is applied to a torque converter hydraulic system, wherein, torque converter hydraulic system comprises hydraulic system, speed changer and fuel tank, external gear pump comprises: a housing and a gear mechanism, and housing is fixedly connected with the casing of speed changer, and the inner chamber of housing is closed cavity, the side of inner chamber is provided with force feed mouth, force feed mouth is connected with hydraulic system, and the opposite side of inner chamber is provided with inlet port, and inlet port is connected with fuel tank; Gear mechanism is arranged in housing, and is flexibly connected with housing, one end of gear mechanism and speed changer bonding, and speed changer actuation gear mechanism rotates in housing; Housing comprises front case 4, middle casing 6 and rear case 8, is provided with several sealing gaskets 5 between front case 4 and middle casing 6, is provided with several sealing gaskets 5 between middle casing 6 and rear case 8.The gap between gear mechanism end face and housing can be adjusted by the quantity adjusting sealing gasket 5.
Front case 4 and rear case 8 are equipped with bearing mounting hole, and needle bearing 3 is arranged in bearing mounting hole; The outer ring, border of front case 4 is provided with tapped hole, and front case 4 relies on stud bolt to be fixedly connected with speed changer by tapped hole.Be provided with seam outside front case 4, seam is for ensureing the abutting joint precision of front case 4 and speed changer.External gear pump is undertaken docking, locating by the seam on front case and the casing of speed changer.
Wherein, gear mechanism comprises: driving gear 2 and a driven gear 1, one end of driving gear 2 and rear case 8 active link, the other end of driving gear 2 by be plugged on front case 4 with speed changer bonding; Driven gear 1 engages with driving gear 2, and one end of driven gear 1 is flexibly connected with front case 4, and the other end is flexibly connected with rear case 8.
Gap between driving gear 2 end face and housing is: the thickness of middle casing 6 adds the thickness of the sealing gasket 5 between front case 4 and middle casing 6, adds sealing gasket 5 thickness between middle casing 6 and rear case 8, then deducts the thickness of driving gear 2; Gap control between driving gear 2 end face and housing is at 0.05mm ~ 0.1mm.
Gap between driven gear 1 end face and housing is: the thickness of middle casing 6 adds the thickness of the sealing gasket 5 between front case 4 and middle casing 6, adds sealing gasket 5 thickness between middle casing 6 and rear case 8, then deducts the thickness of driven gear 1; Gap control between driven gear 1 end face and housing is at 0.05mm ~ 0.1mm.
Radial clearance between the tooth top of driving gear 2 and middle casing 6 controls at 0.005mm ~ 0.075mm; Radial clearance between the tooth top of driven gear 1 and middle casing 6 controls at 0.005mm ~ 0.075mm.
External gear pump also comprise: needle bearing 3 and locating stud 9, needle bearing 3 is arranged on driving gear 2 and between front case 4 and rear case 8, and driven gear 1 and between front case 4 and rear case 8.Locating stud 9 is plugged on front case 4, middle casing 6 and rear case 8, is used for ensureing that front case 4, middle casing 6 and rear case 8 cog the coaxality of hole and bearing hole.
The one or more technological schemes provided in the embodiment of the present invention, at least have following technique effect or advantage:
1, the structural design owing to adopting sealing gasket 5 to seal, both by changing the gap between the quantity fine adjustment gear mechanism end face of sealing gasket 5 and housing, filler opening and oil outlet O type circle sealing configuration requisite space can be saved again, make external gear pump under guarantee high volume efficiency prerequisite, effectively solve the large and usage requirement that cannot work long hours under high temperature (> 80 DEG C) of external gear pump pump volume, and then meet the demand of hydraulic automatic speed variator to hydraulic oil source.
2. owing to have employed the overall outlet structure design of external gear pump, can be external on mission case, compact structure, takes up room little, effectively can also solve the technical problem of existing gear pump maintenance difference.
3, owing to have employed rational radial clearance and end clearance, so the technical problem that under effectively solving low speed, volumetric efficiency is low, and then this pump can be met under the comparatively slow-speed of revolution, and hydraulic automatic speed variator realizes planetary transmission lubrication, torque-converters compensates cooling and gearshift various functions.
4, owing to have employed the structural design that needle bearing 3 supports, compared to conventional sliding bearing, there is the feature that oil resistant liquid pollution capacity is strong, therefore also have longer life.
Embodiment two
A kind of external gear pump that the embodiment of the present invention provides, this pump is by the number of teeth and the identical driving gear 2 of modulus and driven gear 1, and front case 4, middle casing 6 and rear case 8 form, the two ends of driving gear 2 and driven gear 1 adopt needle bearing 3 to support, front case 4, sealing gasket 5 is adopted to seal between middle casing 6 and rear case 8, spline structure is used to drive by speed changer on the right side of driving gear 2 end, driving gear 2 drives driven gear 1 to rotate by sense of rotation shown in arrow in figure, main, changing appears in two sealed cavities volume when gears meshing formed between driven gear 1 and housing.
As shown in Figure 3, Figure 4, front case is provided with front case inlet port 13-1 and front case force feed mouth 12-1, rear case 8 is provided with rear case inlet port 13-2 and rear case force feed mouth 12-2, wherein, front case 4 inlet port 13-1 is identical with rear case 8 inlet port 13-2 intersection shape and structure, common formation inlet port, front case force feed mouth 12-1 is identical with rear case force feed mouth 12-2 intersection shape and structure, common formation force feed mouth.On the right side of housing cavity, namely volume becomes large side into low-pressure cavity 10, and inlet port is arranged in low-pressure cavity 10.Namely on the right side of housing cavity, the volume side that diminishes is hyperbaric chamber 11, and force feed mouth is arranged in hyperbaric chamber 11.Inlet port, between force feed mouth and three housings, sealing gasket 5 is all adopted to seal.Under prerequisite is not ganged up mutually in guarantee high and low pressure chamber 10, manage to be communicated with hyperbaric chamber 11 when pocketed oil district is reduced, now hydraulic oil flows out to hydraulic system by force feed mouth; Pocketed oil district is communicated with low-pressure cavity 10 when increasing, and the hydraulic oil now in fuel tank flows into external gear pump by inlet port.
Embodiment three:
A kind of external gear pump that the embodiment of the present invention provides, the thickness difference design load between driving gear 2 and driven gear 1 is for being not more than 0.01mm.Front case 4, middle casing 6 and rear case 8 sealing surface planeness design objective are 0.012mm, and surface roughness is Ra1.6; Planar sealing pad 5 selects cable paper GB7969-2003.
Because of actual load and the working speed feature of external gear pump, the embodiment of the present invention selects open type drawn cup completely to fill needle bearing, and needle roller quantity is many, and bearing capacity is high.This needle bearing must meet following requirement:
(1) parameters such as the basic load rating of bearing, fatigue limit load, reference rotation velocity are selected need to meet bearing real work operating mode;
(2) temperature requirement: Maximum operating temperature can reach+140 DEG C;
(3) axle raceway tolerance is: h6;
(4) bearing saddle bore tolerance is: N7;
(5) axle raceway face roughness is: Ra0.4;
(6) bearing saddle bore surface roughness is: Ra1.6;
(7) axle and bearing saddle bore guide chamfering to be 10 ° ~ 15 °.
Other are local completely the same with embodiment 1.
Embodiment four
Another aspect provides a kind of torque converter hydraulic system, comprise above-mentioned external gear pump.
It should be noted last that, above embodiment is only in order to illustrate technological scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technological scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (10)
1. an external gear pump, is applied to a torque converter hydraulic system, and wherein, described torque converter hydraulic system comprises hydraulic system, speed changer and fuel tank, it is characterized in that, described external gear pump comprises:
One housing, described housing is fixedly connected with the casing of described speed changer, and the inner chamber of described housing is closed cavity, the side of described inner chamber is provided with force feed mouth, described force feed mouth is connected with described hydraulic system, and the opposite side of described inner chamber is provided with inlet port, and described inlet port is connected with described fuel tank;
One gear mechanism, described gear mechanism is arranged in described housing, and is flexibly connected with described housing, one end of described gear mechanism and described speed changer bonding, and described speed changer drives described gear mechanism to rotate in described housing;
Described housing comprises front case, middle casing and rear case, is provided with several sealing gaskets between described front case and described middle casing, is provided with several sealing gaskets between described middle casing and described rear case.
2. external gear pump as claimed in claim 1, it is characterized in that, described gear mechanism comprises:
One driving gear, one end of described driving gear and described rear case active link, the other end of described driving gear by be plugged on described front case with described speed changer bonding;
One driven gear, described driven gear engages with described driving gear, and one end of described driven gear is flexibly connected with described front case, and the other end is flexibly connected with described rear case.
3. external gear pump as claimed in claim 2, is characterized in that, also comprise:
Needle bearing, described in be arranged on described driving gear and between described front case and rear case, and described driven gear and between described front case and rear case.
4. external gear pump as claimed in claim 2, is characterized in that:
Gap between described driving gear end face and described housing is: the thickness of described middle casing adds the thickness of the described sealing gasket between described front case and described middle casing, add the described sealing gasket thickness between described middle casing and described rear case, then deduct the thickness of described driving gear;
Gap control between described driving gear end face and described housing is at 0.05mm ~ 0.1mm.
5. external gear pump as claimed in claim 2, is characterized in that:
Gap between described driven gear end face and described housing is: the thickness of described middle casing adds the thickness of the described sealing gasket between described front case and described middle casing, add the described sealing gasket thickness between described middle casing and described rear case, then deduct the thickness of described driven gear;
Gap control between described driven gear end face and described housing is at 0.05mm ~ 0.1mm.
6. external gear pump as claimed in claim 2, is characterized in that:
Radial clearance between the tooth top of described driving gear and described middle casing controls at 0.005mm ~ 0.075mm;
Radial clearance between the tooth top of described driven gear and described middle casing controls at 0.005mm ~ 0.075mm.
7. external gear pump as claimed in claim 1, is characterized in that, also comprise:
Locating stud, described locating stud is plugged on described front case, middle casing and rear case.
8. external gear pump as claimed in claim 3, is characterized in that:
Described front case and described rear case are equipped with bearing mounting hole, and described needle bearing is arranged in described bearing mounting hole;
The outer ring, border of described front case is provided with tapped hole, and described front case is fixedly connected with described speed changer by described tapped hole.
9. external gear pump as claimed in claim 3, is characterized in that:
Be provided with seam outside described front case, described seam is for ensureing the abutting joint precision of described front case and described speed changer.
10. a torque converter hydraulic system, is characterized in that, comprises the external gear pump described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500482.1A CN105179229B (en) | 2015-08-14 | 2015-08-14 | External gear rotary pump and Hydrodynamic transmission hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510500482.1A CN105179229B (en) | 2015-08-14 | 2015-08-14 | External gear rotary pump and Hydrodynamic transmission hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105179229A true CN105179229A (en) | 2015-12-23 |
| CN105179229B CN105179229B (en) | 2017-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510500482.1A Active CN105179229B (en) | 2015-08-14 | 2015-08-14 | External gear rotary pump and Hydrodynamic transmission hydraulic system |
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| Country | Link |
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| CN (1) | CN105179229B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762608A (en) * | 2016-11-29 | 2017-05-31 | 湖北航天技术研究院特种车辆技术中心 | Crescent gear pump and high-power hydraulic automatic speed variator hydraulic system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2343630A1 (en) * | 1973-08-30 | 1975-03-13 | Fr August Neidig Soehne Maschi | Gear pump with shaft bearing bushings in housing - drive shaft end is externally sealed within bearing cover |
| CN2334916Y (en) * | 1998-02-18 | 1999-08-25 | 普星机械工业有限公司 | Liquid-delivering gear pump |
| DE102006021815A1 (en) * | 2006-05-10 | 2007-11-15 | Robert Bosch Gmbh | Hydraulic gear wheel machine e.g. external gear pumps used in movable hydraulics, comprises external gear pump with gear wheel system in inner chamber and mesh supported in bearing support opposite to housing |
| CN201027644Y (en) * | 2007-03-06 | 2008-02-27 | 徐福刚 | Hydraulic gear pump |
| CN201941593U (en) * | 2011-02-11 | 2011-08-24 | 东风汽车有限公司 | Axial positioning device for hub reduction gear |
| CN202091185U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Gear pump |
| CN202597092U (en) * | 2012-05-31 | 2012-12-12 | 阜新海普液压制造有限公司 | Axial compensating type high pressure gear pump |
| CN204253360U (en) * | 2014-11-12 | 2015-04-08 | 台州信溢农业机械有限公司 | A kind of Mini gear pump |
-
2015
- 2015-08-14 CN CN201510500482.1A patent/CN105179229B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2343630A1 (en) * | 1973-08-30 | 1975-03-13 | Fr August Neidig Soehne Maschi | Gear pump with shaft bearing bushings in housing - drive shaft end is externally sealed within bearing cover |
| CN2334916Y (en) * | 1998-02-18 | 1999-08-25 | 普星机械工业有限公司 | Liquid-delivering gear pump |
| DE102006021815A1 (en) * | 2006-05-10 | 2007-11-15 | Robert Bosch Gmbh | Hydraulic gear wheel machine e.g. external gear pumps used in movable hydraulics, comprises external gear pump with gear wheel system in inner chamber and mesh supported in bearing support opposite to housing |
| CN201027644Y (en) * | 2007-03-06 | 2008-02-27 | 徐福刚 | Hydraulic gear pump |
| CN201941593U (en) * | 2011-02-11 | 2011-08-24 | 东风汽车有限公司 | Axial positioning device for hub reduction gear |
| CN202091185U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Gear pump |
| CN202597092U (en) * | 2012-05-31 | 2012-12-12 | 阜新海普液压制造有限公司 | Axial compensating type high pressure gear pump |
| CN204253360U (en) * | 2014-11-12 | 2015-04-08 | 台州信溢农业机械有限公司 | A kind of Mini gear pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106762608A (en) * | 2016-11-29 | 2017-05-31 | 湖北航天技术研究院特种车辆技术中心 | Crescent gear pump and high-power hydraulic automatic speed variator hydraulic system |
| CN106762608B (en) * | 2016-11-29 | 2019-01-18 | 湖北航天技术研究院特种车辆技术中心 | Crescent gear pump and high-power hydraulic automatic speed variator hydraulic system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105179229B (en) | 2017-12-15 |
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