CN201714658U - High-pressure gear pump - Google Patents
High-pressure gear pump Download PDFInfo
- Publication number
- CN201714658U CN201714658U CN2010202623555U CN201020262355U CN201714658U CN 201714658 U CN201714658 U CN 201714658U CN 2010202623555 U CN2010202623555 U CN 2010202623555U CN 201020262355 U CN201020262355 U CN 201020262355U CN 201714658 U CN201714658 U CN 201714658U
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- China
- Prior art keywords
- power input
- input shaft
- shaft
- driving gear
- bearing
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- Expired - Lifetime
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Abstract
A spindle-type high-pressure gear pump adopting a three-segment structure in appearance is characterized in that power input shaft extension is not arranged on an integral type main drive gear shaft; an individual power input shaft axial with the main drive gear shaft is arranged in a front cover and supported on a pair of tapered roller bearings; the end of the power input shaft is in involute spline combination, at one end in the front cover, with the main drive gear shaft; the end of the power input shaft extending out of the front cover is a rectangular male spline (or in a shaft head type as required by users) and is connected with a transmission device of a host machine, so that additional axial force and radial force exerted on the main drive gear shaft of the gear pump by the installation and transmission of the gear pump on the host machine is effectively avoided so as to ensure the persistent and normal operation of the gear pump. The high-pressure gear pump is particularly applicable to larger-load walking operation machines.
Description
Technical field
The utility model relates to a kind of gear pump.High-pressure gear pump specifically.
Background technique
The a pair of gear of external gear pump adopts the axle journal design all-in-one-piece structural type with gear and its two ends of support, the integrated main of formative gear pump, passive tooth wheel shaft mostly; One end of its driving gear shaft also is provided with power input shaft and stretches from protecgulum and stretch out, and promptly driving gear is the integral gear axle that has power input shaft.On high-power walking Work machine and medium and heavy discharging vehicle, for the power that obtains main frame with the actuation gear pump work, gear pump has " direct connection " to install on these main frames and " long-range " installs dual mode." direct connection " installed is by the centering position on the gear pump protecgulum it directly to be mounted on the power take-off of main frame to obtain power, and this mounting type generally can be to the power input shaft of gear pump, and promptly driving gear shaft produces additional axial force and radial force; " long-range " installs is to be on the driving gear shaft by transmission shaft from the power input shaft that the power take-off of main frame obtains power and reaches the gear pump of installing away from power take-off, with the actuation gear pump work.This mounting type is because the power input shaft of gear pump is the out-of-alignment phenomenon can occur inevitably between driving gear shaft and the power take-off pto, to produce additional axial force and radial force to the driving gear shaft of gear pump, gear pump power is big more, and this axial force and radial force are big more.This additional axial force and the existence of radial force, not only can influence the sealing life of oil sealing, to make also that the gap reduces between gear face and side plate or the axle sleeve end face, even directly contact, friction-produced high temperature occur, and cause gear face and side plate or axle sleeve end face " ablation " phenomenon to occur; The increase of radial force will increase the bending deflection of gear shaft, reduce the area of contact of axle journal and bearing, quicken the wearing and tearing of axle journal and bearing, spot corrosion also produces high temperature, for the sliding bearing gear pump, even can produce " seize " phenomenon, promptly sintering is killed between bearing and the axle journal, cause gear pump to damage, thus can't proper functioning.
The model utility content
For this reason, technical problem to be solved in the utility model is to overcome that existing long-range installation transmission produces additional axial force and radial force to the driving gear shaft of gear pump and the technical problem that influences the normal operation of gear pump, a kind of influence of eliminating driving gear shaft and suffered additional radial pressure of gear and axial force is provided, thereby guarantees high-pressure gear pump of working reliably steady in a long-term.
High-pressure gear pump described in the utility model, comprise the pump housing, protecgulum and the bonnet that is connected with the two ends of the pump housing respectively, be provided with driving gear that links to each other with driving gear shaft and the driven gear that links to each other with driven gear shaft in the described pump housing, the two ends of described driving gear shaft are supported on respectively on described protecgulum and the described bonnet by the driving gear axle bearing, the two ends of described driven gear shaft are supported on respectively on described protecgulum and the bonnet by the driven gear axle bearing, described driving gear is meshed in the described pump housing with described driven gear, be provided with between the end face of the close protecgulum of described driving gear and described driven gear and the described protecgulum and be used for preventing that the oil in the pump housing from producing the side plate that leaks, be provided with between the end face of the close bonnet of described driving gear and described driven gear and the described bonnet and be used for preventing that the oil in the pump housing from producing the side plate that leaks, the end of described protecgulum is provided with oil sealing retainer hole and bearing hole, described oil sealing retainer hole and described bearing hole are all coaxial with described driving gear shaft, by power input shaft bearing and described driving gear shaft the power input shaft assembly is installed coaxially in the described bearing hole, described power input shaft assembly comprises power input shaft, described power input shaft one end and described driving gear shaft are movably connected, and can drive described driving gear shaft rotation, the described power input shaft the other end is connected with the transmission device of main frame, described power input shaft assembly also comprise the locking nut of adjusting the bearing play and be located at described bearing and described locking nut between locked spacer.
The two ends of described power input shaft are connected with described driving gear shaft with the transmission device of described main frame respectively by external splines.
Described power input shaft bearing is a tapered roller bearing.
Described power input shaft bearing is two single-row tapered roller bearings that internal diameter is all identical with external diameter, and two described single-row tapered roller bearings lean against and are installed in privately in the described protecgulum, between two described single-row tapered roller bearings bearing gasket are installed.
The diameter of the axle journal of described driving gear shaft and described passive tooth wheel shaft reduces gradually from the direction of axle head to gear face, reduce to be worth for the difference between the diameter be 0.003-0.0075mm.
Described oil sealing retainer is equipped with oil sealing retainer assembly in the hole, described oil sealing retainer assembly comprises the oil sealing retainer, be located at oil sealing between described oil sealing retainer and the described power input shaft, be located at the dust ring in the described oil sealing outside, also is provided with pad between described oil sealing and the described dust ring.Also be provided with O shape circle in the outer ring recess of described oil sealing retainer.Tighten oil sealing retainer assembly, can axially fasten the power input shaft assembly.
Technique scheme of the present utility model has the following advantages compared to existing technology: (1) has set up the power input shaft assembly between the transmission device of main frame and gear pump driving gear shaft, described power input shaft assembly is co-axially mounted on the gear pump protecgulum by bearing and driving gear shaft, additional radial pressure and axial force that can power input shaft is suffered be delivered on the body by bearing, pump cover, thus the harmful effect of avoiding axial force that gear pump added because of driving gear shaft and radial force to cause.The high-pressure gear pump that this power input shaft assembly has been installed has also been intercepted because of additional radial pressure and the axial force that driving gear shaft is subjected to, thereby makes the operation of high-pressure gear pump more stable, has also prolonged working life simultaneously.(2) between power input shaft and the main unit transmission device be connected and power input shaft and driving gear shaft between be connected and all adopt spline to connect, simple in structure.(3) the power input shaft assembly also is provided with locked spacer and the locking nut of adjusting the bearing play, makes its operation more steady.(4) bearing adopts two single-row tapered roller bearings, two back-to-back installations of described single-row tapered roller bearing, can bear radial force that power input shaft is subjected to and the axial force on the both direction simultaneously, and suffered power passed to shell, thereby intercepted suffered additional radial pressure and the axial force of driving gear shaft.(5) oil sealing retainer assembly is screwed in the oil sealing retainer hole with outside thread the power input shaft assembly is axially fastened, and makes its operation more reliable.
Description of drawings
For the easier quilt of content of the present utility model is clearly understood, according to specific embodiment of the utility model also in conjunction with the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of power input shaft assembly;
Fig. 2 is the structural representation that the high-pressure gear pump of described power input shaft assembly is installed;
Fig. 3 is the structural representation of oil sealing retainer assembly;
Fig. 4 is the sectional view of power input shaft shaft extension along the A-A direction.
Reference character is expressed as among the figure: 1-driving gear shaft, 2-driven gear shaft, 3-driving gear, 31-driving gear axle bearing, 4-driven gear, 41-driven gear axle bearing, 5-power input shaft assembly, 51-power input shaft, 511-power input shaft shaft extension, 512-power input shaft axle journal, the 52-locking nut, 53-locked spacer, 6-power input shaft bearing, the 100-pump housing, the 200-protecgulum, 300-bonnet, 400-side plate, 600-oil sealing retainer assembly, 601-oil sealing retainer, 603-oil sealing, 604-dust ring, the 605-pad, the 606-O RunddichtringO.
Embodiment
High-pressure gear pump described in the utility model comprises shell, is located at driving gear shaft 1 and driven gear shaft 2 in the shell, and described driving gear shaft 1 and described driven gear shaft 2 pass through driving gear axle bearing and driven gear shaft bearings respectively on described shell.Be respectively equipped with driving gear 3 and driven gear 4 on described driving gear shaft 1 and the driven gear shaft 2, described driving gear 3 is meshing with each other with described driven gear 4, also comprise power input shaft assembly 5, described power input shaft assembly 5 is co-axially mounted on the described gear protecgulum by power input shaft bearing 6 and described driving gear shaft 1.Described power input shaft assembly 5 includes power input shaft 51, and described power input shaft 51 1 ends are connected with the transmission device (not shown) of main frame, and the other end and described driving gear shaft 1 are movably connected, and can drive described driving gear shaft rotation.
In the present embodiment, described transmission device is the power take-off drive shaft of main frame.Described power input shaft assembly 5 also comprises bearing, locking nut 52 and locked spacer 53.The structure of this power input shaft assembly 5 as shown in Figure 1, described power input shaft 51 comprises power input shaft shaft extension 511 and power input shaft axle journal 512, described power input shaft shaft extension 511 is connected with the pto of main frame, on described power input shaft shaft extension 511, be formed with octadentate rectangle external splines, have the sectional view of splined section as Fig. 4 for this power input shaft shaft extension 511.The end of described power input shaft axle journal 512 is provided with the involute outer spline that matches with the inner splined hole of driving gear shaft 1, described power input shaft 51 is installed on the shell by power input shaft bearing 6, described power input shaft bearing 6 is two single-row tapered roller bearing (6a in the present embodiment, 6b), two back-to-back installations of described single-row tapered roller bearing, can bear the radial force that power input shaft 51 is subjected to and the axial force of both direction simultaneously, and suffered power passed to shell, avoid driving gear shaft 1 and driven gear shaft 2 and driven gear 4 suffered additional radial pressure and axial force, thereby prolong the working life of high-pressure gear pump.
High-pressure gear pump structure described in the utility model as shown in Figure 2, comprise the pump housing 100, the protecgulum 200 that is connected with the two ends of the pump housing respectively and bonnet 300, the gear of driving gear shaft 1 and driven gear shaft 2 is installed in the described pump housing 100, and described driving gear shaft 1 and described driven gear shaft 2 pass through driving gear axle bearing and driven gear shaft bearings respectively on described protecgulum 200 and bonnet 300.Driving gear shaft 1 and be arranged on driving gear 3, the driven gear shaft 2 on the described driving gear shaft 1 and be arranged on driven gear 4 on the described driven gear shaft 2, described driving gear 3 is meshed with described driven gear 4, is provided with the side plate 400 that the oil that is used for controlling in the pump housing 100 produces axial leakage between the end face of described driving gear 3 and driven gear 4 and described protecgulum 200 and the bonnet 300.
The end of described protecgulum 200 has oil sealing retainer hole and bearing hole, described oil sealing retainer hole and described bearing hole are all coaxial with described driving gear shaft, by bearing and described driving gear shaft power input shaft assembly 5 is installed coaxially in the described bearing hole, described power input shaft assembly 5 is co-axially mounted on the described pump housing by power input shaft bearing 6 and described driving gear shaft 1, described power input shaft assembly 5 includes power input shaft 51, described power input shaft 51 1 ends are connected with the transmission device (not shown), the other end and described driving gear shaft 1 are movably connected, and can drive described driving gear shaft rotation.In the present embodiment, the structure of this power input shaft assembly 5 as shown in Figure 1, described power input shaft 51 comprises shaft extension 511 and axle journal 512, described shaft extension 511 is connected with the pto of main frame, is formed with octadentate rectangle external splines on described shaft extension.Fig. 4 has the sectional view of splined section for this power input shaft 51.Described spline is that involute outer spline matches with the inner splined hole of described driving gear shaft and constitute to flexibly connect.Described power input shaft 51 is installed on the protecgulum by bearing 6, described bearing 6 is two single-row tapered roller bearing (6a in the present embodiment, 6b), two back-to-back installations of described single-row tapered roller bearing, can bear radial force and axial force that power input shaft 51 is subjected to simultaneously, and suffered power passed to protecgulum, avoid driving gear shaft 1 suffered additional radial pressure and axial force, thereby prolong the working life of high-pressure gear pump.Described power input shaft assembly 5 also comprises bearing, locking nut 52 and locked spacer 53.
The structure of described oil sealing retainer assembly 600 as shown in Figure 3, comprise oil sealing retainer 601, be located at the oil sealing 603 that is used for preventing gear pump oil between described oil sealing retainer 601 and the described power input shaft 51 and reveals, be located at described oil sealing 603 outsides and be used for preventing that external dust from entering the dust ring 604 of bearing, also be provided with pad 605 between described oil sealing and the described dust ring.Also be provided with O RunddichtringO 606 between described oil sealing retainer and the described protecgulum, oil sealing retainer 601 comprises the guiding position that oil sealing retainer assembly 600 is fixed on the binding thread position 601a in the protecgulum 200 and is used for described oil sealing retainer assembly 600 is led, and tightening oil sealing retainer assembly can axially fasten the power input shaft assembly.
The driving gear shaft 1 of this high-pressure gear pump and the axle journal of described passive tooth wheel shaft 2 are turbination, be that its diameter reduces to the direction that gear face is installed gradually from axle head, its value of reducing is 0.003mm for the difference between the diameter, this difference can also be 0.0075mm in the present embodiment, or 0.004mm, or any numerical value between the 0.003mm-0.004mm.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to mode of execution.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all mode of executions.And conspicuous variation of being extended out thus or change still are among the protection domain of the utility model creation.
Claims (6)
1. high-pressure gear pump, comprise the pump housing, protecgulum and the bonnet that is connected with the two ends of the pump housing respectively, be provided with driving gear that links to each other with driving gear shaft and the driven gear that links to each other with driven gear shaft in the described pump housing, the two ends of described driving gear shaft are supported on respectively on described protecgulum and the described bonnet by the driving gear axle bearing, the two ends of described driven gear shaft are supported on respectively on described protecgulum and the bonnet by the driven gear axle bearing, described driving gear is meshed in the described pump housing with described driven gear, be provided with between the end face of the close protecgulum of described driving gear and described driven gear and the described protecgulum and be used for preventing that the oil in the pump housing from producing the side plate that leaks, be provided with between the end face of the close bonnet of described driving gear and described driven gear and the described bonnet and be used for preventing that the oil in the pump housing from producing the side plate that leaks, it is characterized in that: the end of described protecgulum is provided with oil sealing retainer hole and bearing hole, described oil sealing retainer hole and described bearing hole are all coaxial with described driving gear shaft, by power input shaft bearing and described driving gear shaft the power input shaft assembly is installed coaxially in the described bearing hole, described power input shaft assembly comprises power input shaft, described power input shaft one end and described driving gear shaft are movably connected, and can drive described driving gear shaft rotation, the described power input shaft the other end is connected with the transmission device of main frame, described power input shaft assembly also comprise the locking nut of adjusting the bearing play and be located at described bearing and described locking nut between locked spacer.
2. high-pressure gear pump according to claim 1 is characterized in that: the two ends of described power input shaft are connected with described driving gear shaft with the transmission device of described main frame respectively by external splines.
3. high-pressure gear pump according to claim 2 is characterized in that: described power input shaft bearing is a tapered roller bearing.
4. high-pressure gear pump according to claim 3, it is characterized in that: described power input shaft bearing is two single-row tapered roller bearings that internal diameter is all identical with external diameter, two described single-row tapered roller bearings lean against and are installed in privately in the described protecgulum, between two described single-row tapered roller bearings bearing gasket are installed.
5. high-pressure gear pump according to claim 4, it is characterized in that: the diameter of the axle journal of described driving gear shaft and described passive tooth wheel shaft reduces gradually from the direction of axle head to gear face, described reduce to be worth for the difference between the diameter be 0.003-0.0075mm.
6. according to each described high-pressure gear pump among the claim 1-5, it is characterized in that: described oil sealing retainer is equipped with oil sealing retainer assembly in the hole, described oil sealing retainer assembly comprises the oil sealing retainer, be located at oil sealing between described oil sealing retainer and the described power input shaft, be located at the dust ring in the described oil sealing outside, also be provided with pad between described oil sealing and the described dust ring, also be provided with O shape circle in the outer ring recess of described oil sealing retainer, tighten oil sealing retainer assembly, can axially fasten the power input shaft assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202623555U CN201714658U (en) | 2010-07-19 | 2010-07-19 | High-pressure gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202623555U CN201714658U (en) | 2010-07-19 | 2010-07-19 | High-pressure gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201714658U true CN201714658U (en) | 2011-01-19 |
Family
ID=43460654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202623555U Expired - Lifetime CN201714658U (en) | 2010-07-19 | 2010-07-19 | High-pressure gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201714658U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047169A (en) * | 2013-01-15 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Adjustable thrust structure for balancing axial force of gear |
| CN105298834A (en) * | 2015-11-16 | 2016-02-03 | 王建兴 | External gear pump capable of being used for forward and reverse rotation |
| CN105351304A (en) * | 2015-12-15 | 2016-02-24 | 北奔重型汽车重庆有限公司 | High flow steering oil pump driving gear driving connection structure of wide-body mining dump truck |
| CN107762844A (en) * | 2017-11-29 | 2018-03-06 | 徐州科源液压股份有限公司 | With preposition bearing-type gear oil pump |
| CN108361191A (en) * | 2018-02-02 | 2018-08-03 | 上海发那科机器人有限公司 | Duplex geared pump system |
-
2010
- 2010-07-19 CN CN2010202623555U patent/CN201714658U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047169A (en) * | 2013-01-15 | 2013-04-17 | 中国兵器工业集团第七0研究所 | Adjustable thrust structure for balancing axial force of gear |
| CN105298834A (en) * | 2015-11-16 | 2016-02-03 | 王建兴 | External gear pump capable of being used for forward and reverse rotation |
| CN105351304A (en) * | 2015-12-15 | 2016-02-24 | 北奔重型汽车重庆有限公司 | High flow steering oil pump driving gear driving connection structure of wide-body mining dump truck |
| CN107762844A (en) * | 2017-11-29 | 2018-03-06 | 徐州科源液压股份有限公司 | With preposition bearing-type gear oil pump |
| CN108361191A (en) * | 2018-02-02 | 2018-08-03 | 上海发那科机器人有限公司 | Duplex geared pump system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110119 |
|
| CX01 | Expiry of patent term |