CN206346906U - A kind of new external tooth type gear pump - Google Patents
A kind of new external tooth type gear pump Download PDFInfo
- Publication number
- CN206346906U CN206346906U CN201621489389.1U CN201621489389U CN206346906U CN 206346906 U CN206346906 U CN 206346906U CN 201621489389 U CN201621489389 U CN 201621489389U CN 206346906 U CN206346906 U CN 206346906U
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- gear
- pump
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- axis hole
- driving
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- 239000011148 porous material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model relate to a kind of new external tooth type gear pump, including the pump housing, pump cover, driving shaft, driven shaft, driving gear and driven gear, the tooth curve of driving gear and the tooth curve of driven gear are conjugate curves, the involute of driving gear is identical with the involute of driven gear, the pump housing is provided with gear grooved, pump cover is provided with the first axis hole and the second axis hole, the pump housing is provided with oil guide pipe and oil exit pipe, oil guide pipe is arranged on pump housing side and turned on gear grooved, and oil exit pipe is arranged on the another side of the pump housing and turned on gear grooved.Engaged between the gear of new external tooth type gear pump with compact, that is, the closing space formed between tooth and tooth after being engaged is smaller.So that the high pressure reflow ratio of new external tooth type gear pump can drop bottom to less than 6%, or even the effect without backflow.While to the noise produced by the extruding of oil between also reducing gear, and then the loss of the energy is reduced, improve the operating efficiency of new external tooth type gear pump.
Description
Technical field
The utility model is related to gear pump field, more particularly to new external tooth type gear pump.
Background technology
For gear pump, it mainly carries out conveying oil plant with one group of gear engagement so that the oil in oil inlet end passes through
The rotation of gear is transported in oil exit pipe, that is, the oily pump housing that passes through of oil inlet end low-pressure area is transported into oil extraction end higher-pressure region
In.The gear of existing gear pump is in engagement, and the teeth of two gears can have gap in engagement, that is, a gear tooth
Top can not be fully engaged against with the tooth root of an other gear, and then have local oily backflow phenomenon so that the rate of having can be up to
Between 13%~19%, the loss of the energy is caused, while so that the operating efficiency of gear pump is relatively low.
Utility model content
For this reason, it may be necessary to provide a kind of new external tooth type gear pump, for solving, the engagement of gear pump middle gear is incomplete to ask
Topic, reaches that oil return ratio is relatively low, not even the purpose of oil return.
To achieve the above object, inventor provide a kind of new external tooth type gear pump, including the pump housing, pump cover, driving shaft,
Driven shaft, driving gear and driven gear, the tooth curve of driving gear and the tooth curve of driven gear are conjugate curves, main
The involute of moving gear is identical with the involute of driven gear, and the pump housing is provided with gear grooved, and driving gear is mutual with driven gear
Engagement is arranged in gear grooved, and side wall of the driving gear with driven gear with gear grooved is tangent, and pump cover is provided with the first axis hole
With the second axis hole, the shaft end of driving shaft is arranged in the axis hole of driving gear through the first axis hole, and the axle body of driven shaft is arranged on
In the axis hole of driven gear, the pump housing is provided with oil guide pipe and oil exit pipe, and oil guide pipe is arranged on pump housing side and turned on gear grooved,
Oil exit pipe is arranged on the another side of the pump housing and turned on gear grooved.
Further, in addition to key, the shaft end of the driving shaft is provided with the first keyway, and driving gear is provided with the second key
Groove, the end face of key is arranged on the first keyway, and the other end of key is arranged on the second keyway.
Further, in addition to bearing, the bearing is arranged between driven shaft and the axis hole of driven gear.
Further, the pump cover is provided with drain pan, and the drain pan is arranged between the first axis hole and the second axis hole
Central spot.
Further, the oil exit pipe is provided with damper, and the damper is arranged on oil exit pipe and the side wall of the pump housing is led
The logical mouth of pipe.
Further, the damper is filter screen or limiter.
Further, the gear grooved is mounting hole structure gear groove, driving gear and driven gear with gear grooved
Curved wall is tangent.
It is different between prior art, the gear of the new external tooth type gear pump of above-mentioned technical proposal and engages with compact,
It is exactly that the closing space formed between tooth and tooth after being engaged is smaller, the degree even up to ignored.So that new outer
The high pressure reflow ratio of tooth-like gear pump can drop bottom to less than 6%, or even the effect without backflow.While right between also reducing gear
Noise produced by the extruding of oil, and then the loss of the energy is reduced, improve the operating efficiency of new external tooth type gear pump.
Brief description of the drawings
Fig. 1 is the explosive view of new external tooth type gear pump in the present embodiment；
Fig. 2 is the front view of new external tooth type gear pump in the present embodiment；
Fig. 3 is driving gear and the intermeshing schematic diagram of driven gear in the present embodiment；
Fig. 4 is the schematic diagram of the pump housing of new external tooth type gear pump in the present embodiment；
Fig. 5 is the damper schematic diagram of new external tooth type gear pump in the present embodiment.
Description of reference numerals：
10th, the pump housing；11st, pump cover；12nd, driving shaft；
13rd, driven shaft；14th, driving gear；15th, driven gear；
101st, gear grooved；111st, the first axis hole；112nd, the second axis hole；
102nd, oil guide pipe；103rd, oil exit pipe；113rd, drain pan；
1031st, damper；16th, key；17th, bearing；
131st, the first keyway；141st, the second keyway；1021st, the oil diverting port of oil guide pipe；
1032nd, the oil discharge outlet of oil exit pipe；1033rd, the side of the pump housing；
Embodiment
To describe technology contents of the present utility model, construction feature, the objects and the effects in detail, below in conjunction with implementation
Mode simultaneously coordinates accompanying drawing to be explained in detail.
Refer to Fig. 1 and Fig. 2, a kind of new external tooth type gear pump of the utility model, including the pump housing 10, pump cover 11, master
Moving axis 12, driven shaft 13, driving gear 14 and driven gear 15, the tooth curve of driving gear and the tooth curve of driven gear
For conjugate curves, the involute of driving gear is identical with the involute of driven gear, and the pump housing is provided with gear grooved 101, driving tooth
Wheel is arranged in gear grooved with driven gear intermeshing, and gear grooved is mounting hole structure gear groove, driving gear and driven tooth
Take turns side wall with gear grooved tangent, pump cover is provided with the first axis hole 111 and the second axis hole 112, the shaft end of driving shaft passes through the
One axis hole is arranged in the axis hole of driving gear, and the axle body of driven shaft is arranged in the axis hole of driven gear, and the pump housing, which is provided with, leads
Oil pipe 102 and oil exit pipe 103, oil guide pipe are arranged on pump housing side and turned on gear grooved, and oil exit pipe is arranged on the another of the pump housing
Turn on sideways and with gear grooved.The pump cover is provided with drain pan 113, and the drain pan is arranged on the first axis hole and the second axis hole
Between central spot.The oil exit pipe is provided with damper 1031, and the damper is arranged on the side of oil exit pipe and the pump housing
The mouth of pipe of 1033 conductings；The damper is filter screen or limiter.Also include key 16 and bearing 17, the shaft end of the driving shaft is set
Be equipped with the first keyway 131, driving gear is provided with the second keyway 141, and the end face of key is arranged on the first keyway, key it is another
End is arranged on the second keyway；The bearing is arranged between driven shaft and the axis hole of driven gear.
In certain embodiments, when oil sucks the pump housing from oil guide pipe, driving gear can be driven by motor to be rotated, such as
Shown in Fig. 1, Fig. 3 and Fig. 4, driving gear is arranged side by side with driven gear, if driving gear is located at the right of driven gear, with
The oil inlet of oil guide pipe is the direction of twelve-hour, and motor drives driving gear to be rotated clockwise；If driving gear position
In the left side of driven gear, then using the oil inlet of oil guide pipe as the direction of twelve-hour, motor drives driving gear counterclockwise
Direction rotates.The gear grooved of the pump housing is the gear grooved of a kidney-shaped pore structure, and oil guide pipe is arranged on kidney-shaped pore structure with oil exit pipe
Two waist side walls on, and the oil diverting port 1021 of oil guide pipe is oppositely arranged with the oil discharge outlet 1032 of oil exit pipe, that is, oil diverting port
Be in oil discharge outlet on same center line, while oil diverting port is mutually nibbled with oil discharge outlet both facing to driving gear with driven gear
The position of conjunction.When driving gear is meshed with driven gear, the process being engaged between its tooth and tooth can reach mutually mutual always
Cut, and then cause the flank profil line of driving gear and driven gear to be conjugate curves, while driving gear and driven gear are gradually opened
Line is identical, therefore the tooth top of driving gear can be fully engaged against with the tooth root of driven gear, so reach driving gear with it is driven
The flank section of gear is divided into involute identical flank part, and tooth top and root portions tooth top then for complex conjugate curve and
Tooth root, thus driving gear with driven gear when engaging, the engagements of its tooth other gears compared with the gap between tooth all compared with
It is small, so when carrying out conveying oil plant, its oil return ratio is relatively low.Do not have even simultaneously because the closing space between tooth and tooth reduces
Have, and closing space is formed between tooth top and bottom of the tooth when engaging, and then pocketed oil phenomenon can be caused.And oil plant is by height
Nip to low-pressure area transmit when, that is, when being transported to oil exit pipe one end from oil guide pipe one end, the volume of closing space can be gradually
Become the process of as low as minimum, and then can become larger again.In closing space process from large to small, driving gear and driven tooth
Engagement between wheel can be compressed to oil plant so that the pressure in closing space rises sharply, and consume can be caused to oil plant and power,
Vibration and noise are produced simultaneously.And the gas in oil plant will be by high pressure compressed, and it is dissolved in oil plant, when closing space is passed through
Minimum volume it is critical after, the volume of closing space can become larger so that be dissolved in by the gas in oil plant because pressure is die-offed and
Separate out, and then cavitation phenomenon is produced to driving gear and driven gear so that the tooth surface damage of driving gear and driven gear, enter
And the service life of driving gear and driven gear is reduced, while can also cause damage to the pump housing and pipeline.Set on pump cover
The first axis hole and the second axis hole have been put, then driving gear has been fixed with driven gear by driving shaft and driven shaft, actively
The axis hole of gear and the first axis hole concentric, are being fixed in the shaft end by driving shaft with driving gear, in driving shaft and master
Moving gear can process the second keyway when fixing on the axis hole of gear, process the first keyway in the shaft end of driving shaft, passing through
Key is attached to driving shaft and driving gear so that driving gear rotates as driving shaft rotates, and the driving of driving shaft
End, which is then stretched out, to be located at outside pump cover so that motor can be attached with driving shaft, and then drive driving gear.And driven tooth
The axle body of the axis hole of wheel and driven shaft is socketed, and is provided with axle body bearing, and the two ends of driven shaft are fixed on gear grooved
In bottom land and the second axis hole, end cap can also be installed additional on the second axis hole, the second axis hole is covered so that debris will not fall
Fall in gear grooved.New external tooth type gear pump is easy to use, and operating efficiency is high, and noise is small.
As shown in Fig. 2 in certain embodiments, be additionally provided with drain pan on pump cover, drain pan be located at driving gear with
Driven gear is meshed the top at place so that drain pan can effectively reduce the vibrations of new external tooth type gear pump operationally
With noise.As shown in figure 5, be provided with damper at the oil discharge outlet of oil exit pipe simultaneously, damper can be filter screen or limiter,
So that new external tooth type gear pump can operationally push fluid through filter screen or limiter.If filter screen is after working long hours
It is dirty to plug, or the back pressure value of limiter increases, then new external tooth type gear pump still can keep constant flow, directly
, can be accurate which ensures that new external tooth type gear pump is stable to the mechanical limit for reaching part most weak in device
Discharge fluid flow.
Embodiment of the present utility model is the foregoing is only, scope of patent protection of the present utility model is not thereby limited,
The equivalent structure transformation that every utilization the utility model specification and accompanying drawing content are made, or directly or indirectly it is used in other phases
The technical field of pass, is similarly included in scope of patent protection of the present utility model.
Claims (7)
1. a kind of new external tooth type gear pump, it is characterised in that：Including the pump housing, pump cover, driving shaft, driven shaft, driving gear and
Driven gear, the tooth curve of driving gear and the tooth curve of driven gear be conjugate curves, the involute of driving gear with
The involute of driven gear is identical, and the pump housing is provided with gear grooved, and driving gear is arranged on gear grooved with driven gear intermeshing
Interior, side wall of the driving gear with driven gear with gear grooved is tangent, and pump cover is provided with the first axis hole and the second axis hole, driving shaft
Shaft end be arranged on through the first axis hole in the axis hole of driving gear, the axle body of driven shaft is arranged in the axis hole of driven gear,
The pump housing is provided with oil guide pipe and oil exit pipe, and oil guide pipe is arranged on pump housing side and turned on gear grooved, and oil exit pipe is arranged on the pump housing
Another side and with gear grooved turn on.
2. new external tooth type gear pump according to claim 1, it is characterised in that：Also include key, the axle of the driving shaft
End is provided with the first keyway, and driving gear is provided with the second keyway, and the end face of key is arranged on the first keyway, the other end of key
It is arranged on the second keyway.
3. new external tooth type gear pump according to claim 1, it is characterised in that：Also include bearing, the bearing is set
Between driven shaft and the axis hole of driven gear.
4. new external tooth type gear pump according to claim 1, it is characterised in that：The pump cover is provided with drain pan, institute
State the central spot that drain pan is arranged between the first axis hole and the second axis hole.
5. new external tooth type gear pump according to claim 1, it is characterised in that：The oil exit pipe is provided with damper,
The damper is arranged on the mouth of pipe of the side wall conducting of oil exit pipe and the pump housing.
6. new external tooth type gear pump according to claim 5, it is characterised in that：The damper is filter screen or limitation
Device.
7. new external tooth type gear pump according to claim 1, it is characterised in that：The gear grooved is kidney-shaped pore structure tooth
Race, curved wall of the driving gear with driven gear with gear grooved is tangent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621489389.1U CN206346906U (en) | 2016-12-30 | 2016-12-30 | A kind of new external tooth type gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621489389.1U CN206346906U (en) | 2016-12-30 | 2016-12-30 | A kind of new external tooth type gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206346906U true CN206346906U (en) | 2017-07-21 |
Family
ID=59319795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621489389.1U Expired - Fee Related CN206346906U (en) | 2016-12-30 | 2016-12-30 | A kind of new external tooth type gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206346906U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278559A (en) * | 2022-01-10 | 2022-04-05 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump with adjusting function and operation stability improving function |
| CN114320889A (en) * | 2022-01-04 | 2022-04-12 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump capable of achieving efficient damping |
-
2016
- 2016-12-30 CN CN201621489389.1U patent/CN206346906U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320889A (en) * | 2022-01-04 | 2022-04-12 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump capable of achieving efficient damping |
| CN114320889B (en) * | 2022-01-04 | 2022-10-04 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump capable of achieving efficient damping |
| CN114278559A (en) * | 2022-01-10 | 2022-04-05 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump with adjusting function and operation stability improving function |
| CN114278559B (en) * | 2022-01-10 | 2022-09-16 | 淮安市虎力液压机械有限公司 | Hydraulic gear pump with adjusting function and operation stability improving function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170721 Termination date: 20201230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |