CN209704834U - A kind of high viscosity medium lubricating gear pump - Google Patents
A kind of high viscosity medium lubricating gear pump Download PDFInfo
- Publication number
- CN209704834U CN209704834U CN201920409677.9U CN201920409677U CN209704834U CN 209704834 U CN209704834 U CN 209704834U CN 201920409677 U CN201920409677 U CN 201920409677U CN 209704834 U CN209704834 U CN 209704834U
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- Prior art keywords
- cavity
- oil inlet
- lubrication
- son
- gear
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- 230000001050 lubricating effect Effects 0.000 title claims abstract description 22
- 238000005461 lubrication Methods 0.000 claims abstract description 99
- 229910045601 alloy Inorganic materials 0.000 claims description 11
- 239000000956 alloy Substances 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 238000005266 casting Methods 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 abstract description 6
- 239000003921 oil Substances 0.000 description 90
- 239000007788 liquid Substances 0.000 description 11
- 229910001018 Cast iron Inorganic materials 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 239000004615 ingredient Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 2
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910001061 cast iron phase Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The utility model discloses a kind of high viscosity medium lubricating gear pumps, it include: the pump housing, it which is provided with oil inlet cavity and lubrication cavity one, wherein, oil inlet cavity includes the first oil inlet cavity and the second oil inlet cavity being linked in sequence according to oil inlet direction, and the oil inlet efficiency of the first oil inlet cavity is greater than the second oil inlet cavity；Gear-driven assembly, it is helical gear driving gear and driven gear including it is intracorporal to be set to pump, wherein, the junction of driving gear both sides of the face and driving gear shaft axle body is equipped with first groove, the junction of driven gear both sides of the face and driven gear shaft axle body is equipped with second groove, and driven gear shaft is equipped with through-hole；And rear end cap, it which is provided with lubrication cavity two, wherein the lubricating loop of circulation is formed between lubrication cavity one, through-hole, lubrication cavity two and pump housing inner hole.The utility model also reduces the abrasion of gear pump, is able to extend the service life of gear pump while realizing reduces noise, improves self-priming performance.
Description
Technical field
The utility model relates to a kind of fluid conveying pump body devices, more particularly, to a kind of high viscosity medium oilgear
Pump.
Background technique
External gear rotary pump is generally used for the conveying of oil, transportation by lighter, the device mainly includes the pump housing, is set to the intracorporal a pair of pump
The gear of external toothing and the end cap on the pump housing, the gear shaft of the gear are mounted in end cap through sliding bearing
Bearing block in, wherein the gear shaft of driving gear pass through end cap connect with driving mechanism.
Gear employed in existing gear pump is generally divided into spur gear and two kinds of helical gear.
When using conventional spur gear, spur gear enters engagement along the facewidth simultaneously, thus generates impact vibration noise, and transmission is not
Steadily.
When using helical gear, it is gradual that gear, which starts to engage and be disengaged from all, thus stable drive, noise are small, and
And oblique gear spiral angle is bigger, registration is also bigger, is more conducive to movement steadily and reduces noise, but has the disadvantage that work
When the axial force that generates it is also bigger, this (engages the joint surface of gear pump with gear face on gear face, the pump housing and end cap
Face) and sliding bearing can generate and be seriously worn, cause gear pump to fail rapidly, reduce the service life of gear pump.
For high viscosity medium (medium motion range of viscosities: 1000mm2/ S~20000mm2/ S) for, existing gear
Problem often inadequate there is also self-priming performance is pumped, leads to medium sucking slowly, low efficiency, and be easy to be full of a large amount of bubbles, from
And cavitation is generated, also reduce the service life of gear pump.
Utility model content
The purpose of this utility model is to provide a kind of high viscosity medium lubricating gear pump, with realize reduce noise,
While improving self-priming performance, extend the service life of gear pump.
For this purpose, the utility model uses following technical scheme:
A kind of high viscosity medium lubricating gear pump, comprising: the pump housing, front end have and the integrally formed drive end bearing bracket of the pump housing
Portion, oil inlet cavity, the oil outlet, the oil outlet chamber being connected to the oil outlet which is provided with oil inlet, be connected to the oil inlet
Road and lubrication cavity one, wherein the oil inlet cavity includes the first oil inlet cavity being linked in sequence according to oil inlet direction and the
The intracavitary volume of two oil inlet cavities, the first oil inlet cavity is greater than the second oil inlet cavity, the cavity of the first oil inlet cavity
Area of section is greater than the cavity area of section of the second oil inlet cavity；Gear-driven assembly, including driving gear shaft, driven gear
Axis, sliding bearing and it is set to the intracorporal driving gear of the pump and driven gear, wherein the driving gear and driven tooth
Wheel is helical gear, and the junction of the driving gear shaft axle body and driving gear both sides of the face is equipped with first groove, described
The junction of driven gear shaft axle body and driven gear both sides of the face is equipped with second groove, the driving gear shaft and/or from
Movable gear shaft is equipped with axially disposed through-hole；And rear end cap, it is fixed on the rear end of the pump housing, which is provided with lubricating cavity
The head end in road two, the lubrication cavity two is connected to first groove, the second groove close to rear end cap, the lubrication cavity two
End connection pump housing inner hole oil inlet side, be in the profit for placing two bearing holes of sliding bearing in the rear end cap
In sliding cavity two, wherein the lubrication cavity one is connected to first groove, the second groove close to front end cover, before described
It is in the lubrication cavity one in end cap portions for placing two bearing holes of sliding bearing, the through-hole is connected to the lubrication
Cavity one and lubrication cavity two.
Further, the lubrication cavity one includes the first son lubrication cavity one and the second son lubrication cavity one, wherein institute
State first son lubrication cavity one set there are two, two it is described first son lubrication cavities one respectively with the first ditch close to front end cover
Slot is connected to second groove, and the second son lubrication cavity one and two the first son lubrication cavity one is respectively by the cover of front end
Two bearing holes for placing sliding bearing are connected to, through-hole connection the second son lubrication cavity one and lubrication cavity
Two.
Further, the lubrication cavity two includes first son lubrication cavity the two, second son lubrication cavity two and third
Son lubrication cavity two, wherein it is described first son lubrication cavity two set there are two, two it is described first son lubrication cavities two respectively with
First groove close to rear end cap is connected to second groove, the second son lubrication cavity two and two the first son lubrication cavity two
Respectively by the way that, for placing two bearing holes connection of sliding bearing, the third lubrication cavity two is connected to described in rear end cap
The oil inlet side of second son lubrication cavity two and pump housing inner hole, through-hole connection second son lubricate cavity one and the second son profit
Sliding cavity two.
Further, the driven gear shaft is located at the lower section of driving gear shaft, wherein the through-hole be only set to it is described from
On movable gear shaft.
Further, the oil inlet cavity is in stepped hole shape, and the cross section of the first oil inlet cavity is T-shaped.
Further, the fuel-displaced cavity includes the first fuel-displaced cavity and the second fuel-displaced cavity, wherein according to fuel-displaced direction
The second fuel-displaced cavity and the first fuel-displaced cavity are linked in sequence, and it is fuel-displaced that the intracavitary volume of the first fuel-displaced cavity is greater than second
Cavity, the cavity area of section of the first fuel-displaced cavity are greater than the cavity area of section of the second fuel-displaced cavity.
Further, the first compensating groove there are two being set on the pump housing, wherein one in two first compensating grooves
It is connected in oil inlet side and with oil inlet, another is in oil outlet side and is connected to oil outlet.
Further, the second compensating groove there are two being set on the rear end cap, wherein one in two second compensating grooves
A to be in oil inlet side and be connected to oil inlet, another is in oil outlet side and is connected to oil outlet.
Further, the pump housing and/or rear end cap are alloy iron casting.
The utility model has following technical effect that
(1) on the basis of leakproofness of the utility model when guaranteeing that gear pump oil inlet and pump housing inner hole are connected, expand
The volume and cavity area of section of oil inlet cavity, effectively increase the self-priming performance of gear pump, so that the suction efficiency of medium
It is improved, the demand of high slimy medium feeding can be reached；
(2) pump housing inner hole in the utility model, lubrication cavity one, through-hole and lubrication cavity dimorphism are at circulation
Lubricating loop also reduces gear pump and is working so as to which the abrasion on gear pump joint surface and sliding bearing is effectively reduced
When the heat that generates, pump intracorporal bubble in addition, being also convenient for eliminating, reduce degree of cavitation, this is conducive to improve making for gear pump
With service life and service performance；
(3) first groove described in the utility model and second groove design so that when gear pump work have part oil liquid
Medium enters in first groove and second groove, and the axial thrust load that this two-part oil liquid medium generates when engaging to gear has flat
Weighing apparatus effect, so that abrasion of the axial force to gear pump joint surface is reduced, so that the service life of gear pump is improved.
Other than objects, features and advantages described above, there are also other purposes, feature and excellent for the utility model
Point.Below with reference to figure, the utility model is described in further detail.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide a further understanding of the present invention, this is practical
Novel illustrative embodiments and their description are not constituteed improper limits to the present invention for explaining the utility model.
In the accompanying drawings:
Fig. 1 a is the structural schematic diagram of driving gear in the utility model；
Fig. 1 b is the partial enlarged view in Fig. 1 a at A；
Fig. 1 c is the structural schematic diagram of driven gear in the utility model；
Fig. 2 is the structural schematic diagram of the utility model；
Fig. 3 shows the internal structure of the utility model；
Fig. 4 a is the structural schematic diagram of the utility model middle pump body；
Fig. 4 b is the cross-sectional view of the line A-A along Fig. 4 a；
Fig. 4 c is the cross-sectional view of the line B-B along Fig. 4 b；
Fig. 4 d is the cross-sectional view of the line C-C along Fig. 4 b；
Fig. 4 e is the cross-sectional view of the line D-D along Fig. 4 a；
Fig. 5 a is the structural schematic diagram of rear end cap in the utility model；
Fig. 5 b is the cross-sectional view of the E-E line along Fig. 5 a；And
Fig. 5 c is the cross-sectional view of the F-F line along Fig. 5 a.
Description of symbols
1, the pump housing；11, front end cover；
12, oil inlet；13, oil inlet cavity；
13a, the first oil inlet cavity；13b, the second oil inlet cavity；
14, oil outlet；15, fuel-displaced cavity；
15a, the first fuel-displaced cavity；15b, the second fuel-displaced cavity；
16, cavity one is lubricated；16a, the first son lubrication cavity one；
16b, the second son lubrication cavity one；17, the first compensating groove；
21, driving gear；22, driven gear；
23, first groove；24, second groove；
25, through-hole；3, rear end cap；
31, cavity two is lubricated；31a, the first son lubrication cavity two；
31b, the second son lubrication cavity two；31c, third lubricate cavity two；
32, the second compensating groove.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 2,3, the high viscosity medium of the utility model is two-part structure with lubricating gear pump, including the pump housing 1,
Gear-driven assembly and rear end cap 3.
As shown in Fig. 4 a~4e and Fig. 2, the front end of the pump housing 1 have with the integrally formed front end cover 11 of the pump housing 1,
The pump housing 1 is equipped with oil inlet 12, the oil inlet cavity 13 being connected to the oil inlet 12, oil outlet 14 and the oil outlet
The fuel-displaced cavity 15 and lubrication cavity 1 of 14 connections, wherein the oil inlet cavity 13 includes connecting according to oil inlet direction sequence
The the first oil inlet cavity 13a and the i.e. described first oil inlet cavity 13a of the second oil inlet cavity 13b that connect and oil inlet 12 connect described the
Two oil inlet cavity 13b and pump housing inner hole are connected, and the intracavitary volume of the first oil inlet cavity 13a is greater than the second oil inlet cavity 13b,
And the cavity area of section of the first oil inlet cavity 13a is greater than the cavity area of section of the second oil inlet cavity 13b.
As shown in Fig. 1 a~1c and Fig. 3, the gear-driven assembly includes driving gear shaft, driven gear shaft, multiple
Sliding bearing and the driving gear 21 and driven gear 22 of a pair of of the external toothing being set in the pump housing 1, wherein the master
Moving gear 21 and driven gear 22 are helical gear, the junction of the driving gear shaft axle body and 21 both sides of the face of driving gear
It is equipped with first groove 23, the junction of the driven gear shaft axle body and 22 both sides of the face of driven gear is equipped with second groove
24, the driving gear shaft and/or driven gear shaft are equipped with axially disposed through-hole 25.
The rear end cap 3 is fixed on the rear end of the pump housing 1 by bolt, and the rear end cap 3 is equipped with lubrication cavity two
31, the head end of the lubrication cavity 2 31 is connected to first groove 23, the second groove 24 close to rear end cap 3, the lubrication
The end of cavity 2 31 is connected to the oil inlet side of pump housing inner hole, is used to place two bearing holes of sliding bearing in the rear end cap 3
In the lubrication cavity 2 31.
Wherein, the lubrication cavity 1 is connected to first groove 23, the second groove 24 close to front end cover 11, institute
It states in front end cover 11 and is in the lubrication cavity 1 for placing two bearing holes of sliding bearing, the lubrication cavity
One 16 are connected to lubrication cavity 2 31 by the through-hole 25.
The design of the lubrication cavity 1, lubrication cavity 2 31 and through-hole 25 is so that when gear pump work, the profit
The lubricating loop of circulation, oil liquid medium energy are formd between sliding cavity 1, through-hole 25, lubrication cavity 2 31 and pump housing inner hole
The oil inlet side that pump housing inner hole is enough returned by multiple sliding bearings, so effectively reduces gear pump joint surface and cunning
The abrasion of dynamic bearing also reduces the heat that gear pump generates at work, pumps intracorporal bubble, drop in addition, being also convenient for eliminating
Low degree of cavitation, this is conducive to the service life and service performance that improve gear pump.
Leakproofness, that is, oil inlet and the pump housing inner hole when connecting for gear pump oil inlet to be guaranteed and pump housing inner hole are connected
When need to guarantee sealing area greater than a tooth so that oil inlet cavity should not mistake with the cavity area of section at pump housing inner hole connection
Greatly, the base of the design of oil inlet cavity described in the utility model leakproofness when guaranteeing that gear pump oil inlet and pump housing inner hole are connected
The volume and cavity area of section that oil inlet cavity is expanded on plinth, for the oil inlet cavity compared to traditional no volume variation,
The self-priming performance of gear pump is effectively increased, so that the suction efficiency of medium is improved, high slimy medium feeding can be reached
Demand.
The design of first groove 23 described in the utility model and second groove 24 so that when gear pump work have part oily
Liquid medium enters in first groove 23 and second groove 24, the axial direction that this two-part oil liquid medium generates when engaging to gear point
Power has balanced action, so that abrasion of the axial force to gear pump joint surface is reduced, so that the service life of gear pump obtains
It improves.And the first groove 23, second groove 24 are connected to lubrication cavity 1 and lubrication cavity 2 31, so will not
Because this two parts oil liquid medium there are due to generate noise and be driven unstable.
Front end cover described in the utility model 11 and the pump housing 1 are integrally formed, so that the overall structure of gear pump is more tight
It gathers, effectively reduces axial dimension, reduce coupling part, improve sealing reliability.
Specifically, the lubrication cavity 1 includes the first son lubrication one 16b of cavity of lubrication one 16a of cavity and second,
Wherein, there are two the first son lubrication one 16a of cavity is set, one in two the first son lubrication one 16a of cavity with it is tight
The first groove 23 of adjacent front end cover 11 is connected to, another is connected to the second groove 24 close to front end cover 11, and described second
One 16b and two first son lubrication one 16a of cavity of son lubrication cavity passes through in front end cover 11 respectively for placing sliding bearing
Two bearing holes connection, the through-hole 25 be connected to it is described second son lubrication one 16b of cavity and lubrication cavity 2 31.
Specifically, as shown in Fig. 5 a~5c, the lubrication cavity 2 31 includes the first son lubrication two 31a of cavity, the second son
It lubricates two 31b of cavity and third lubricates two 31c of cavity.
Wherein, there are two the first son lubrication two 31a of cavity is set, in two the first son lubrication two 31a of cavity
One is connected to the first groove 23 close to rear end cap 3, another is connected to the second groove 24 close to rear end cap 3, and described
Two son lubrication two 31a of cavity of son lubrication cavity two 31b and two first pass through in rear end cap 3 respectively for placing sliding bearing
The connection of two bearing holes, third lubrication two 31c of cavity are connected to the second son lubrication two 31b of cavity and pump housing inner hole
Oil inlet side, the through-hole 25 are connected to the second son lubrication one 16b of cavity and second son lubrication two 31b of cavity.
In one embodiment, the face of the rear end cap engaged with gear face is equipped with modified epoxy wear-resistant coating,
The thickness of the coating is in 0.005~0.008mm, to improve the hardness and strength of rear end cap, meets gear pump anti-seismic performance, wear-resisting
Property, resistance to pitting requirement.
Multiple sliding bearings in this lubricating gear pump are DU bearing, in production, lead, chromium component are added, to improve axis
The bearing capacity and wearability held, it is ensured that the formation of oil film under high viscosity operating condition, and then effective profit is formed to lubricating gear pump
It is sliding and cooling.
In view of the driven gear in gear pump is generally in the lower section of driving gear, and reduce processing cost, this reality
It is only set on the driven gear shaft with the through-hole 25 in novel, is so also convenient for that the lubrication in cavity one will be lubricated
Oil liquid medium is transmitted in lubrication cavity two.
In one embodiment, as shown in Fig. 4 b and Fig. 4 d, the oil inlet cavity 13 is in stepped hole shape, first oil suction chamber
The cross section of road 13a is in T shape, to expand the first oil inlet cavity on the basis of bolt connection piece as far as possible on avoiding the pump housing
The intracavitary volume of 13a, can further increase the self-priming performance of gear pump.
In one embodiment, as shown in figures 4 b and 4 c, the fuel-displaced cavity 15 includes being linked in sequence according to fuel-displaced direction
The second fuel-displaced fuel-displaced cavity 15b of fuel-displaced cavity 15a i.e. second of cavity 15b and first and pump housing inner hole connect the first fuel-displaced cavity
15a and oil outlet 14 are connected, and the intracavitary volume of the first fuel-displaced cavity 15a is greater than the second fuel-displaced cavity 15b, and described first goes out
The cavity area of section of oil pocket road 15a is greater than the cavity area of section of the second fuel-displaced cavity 15b, to improve the discharge of oil liquid medium
Efficiency.The cross section also design in T shape of the first fuel-displaced cavity 15a.
The gear pump of the utility model is designed using multi-cavity road, big cavity, also has the characteristics that gear pump light-weighted.
It will appear pocketed oil phenomenon when gear pump work, when driving gear is engaged with driven gear, for this purpose, on the pump housing 1
The position in corresponding pocketed oil area is set there are two the first compensating groove 17, in two first compensating grooves 17 one in oil inlet side simultaneously
It is connected to oil inlet 12, another is in oil outlet side and is connected to oil outlet 14, and the oil liquid medium in pocketed oil area is drained, and protects
Demonstrate,prove gear pump even running.
Further, the position that pocketed oil area is corresponded on the rear end cap 3 is set there are two the second compensating groove 32, and two described the
One is in oil inlet side and is connected to oil inlet 12 in two compensating grooves 32, another is in oil outlet side and connects with oil outlet 14
It is logical, the oil liquid medium in pocketed oil area is discharged with being further ensured that.
In addition, the high-voltage oil liquid medium in above-mentioned the first compensating groove 17 and the second compensating groove 32 in oil outlet side is to fortune
Gear face in turning has supporting role, can the engagement of active balance gear when the axial thrust load that generates, to reduce abrasion,
The service life and service performance of gear pump can be further increased.
The utility model reduces off-load separation and two described second between two first compensating grooves 17
Off-load separation between compensating groove 32, and the off-load slot length L2 of the first compensating groove 17 and the second compensating groove 32 is expanded,
Under the premise of guaranteeing tooth sealing at compensating groove, the unloading effect of compensating groove is improved.
The pump housing 1 and rear end cap 3 in the utility model are made of alloy cast iron newly developed.
The alloy cast iron newly developed by weight percentage, group ingredient and content are as follows: carbon 2.5~3.5%, silicon 1.6
~1.8%, manganese 0.7~0.9%, sulphur 0.07~0.12%, phosphorus 0.01~0.06%, copper 0.3~0.5%, molybdenum 0.15~
0.2%, chromium 0.1~0.15%, surplus are iron.
The group ingredient of the alloy cast iron of embodiment 1
The group ingredient of the alloy cast iron of embodiment 2
The group ingredient of the alloy cast iron of embodiment 3
The hardness of the pump housing 1 and rear end cap 3 in the utility model can reach 210~220HBS.
Moulding material used in existing gear pump upper pump casing and end cap is also alloy cast iron, by weight percentage
Meter, group ingredient and content are as follows: carbon 2.5~3.5%, silicon 1.92~2.01%, manganese 0.55~0.6%, sulphur are less than 0.6%, phosphorus
It is iron less than 0.1%, surplus.The pump housing of existing alloy cast iron and the hardness of end cap are in 170~210HBS.
The pump housing and rear end cap in the utility model are made of alloy cast iron newly developed, with existing alloy cast iron phase
Than improving the wearability of pump case, being more in line with the special operation condition demand of lubricating gear pump.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (9)
1. a kind of high viscosity medium lubricating gear pump characterized by comprising
The pump housing (1), front end have with the integrally formed front end cover (11) of the pump housing (1), which is provided with oil inlet (12) and institute
State oil inlet (12) connection oil inlet cavity (13), oil outlet (14), the fuel-displaced cavity (15) being connected to the oil outlet (14),
And lubrication cavity one (16), wherein the oil inlet cavity (13) includes the first oil suction chamber being linked in sequence according to oil inlet direction
The intracavitary volume of road (13a) and the second oil inlet cavity (13b), the first oil inlet cavity (13a) is greater than the second oil inlet cavity
(13b), the cavity area of section of the first oil inlet cavity (13a) are greater than the cavity area of section of the second oil inlet cavity (13b)；
Gear-driven assembly including driving gear shaft, driven gear shaft, sliding bearing and is set in the pump housing (1)
Driving gear (21) and driven gear (22), wherein the driving gear (21) and driven gear (22) are helical gear, described
The junction of driving gear shaft axle body and driving gear (21) both sides of the face is equipped with first groove (23), the driven gear shaft
The junction of axle body and driven gear (22) both sides of the face is equipped with second groove (24), the driving gear shaft and/or driven
Gear shaft is equipped with axially disposed through-hole (25)；And
Rear end cap (3), is fixed on the rear end of the pump housing (1), which is provided with lubrication cavity two (31), the lubrication cavity two
(31) head end is connected to first groove (23), the second groove (24) close to rear end cap (3), the lubrication cavity two (31)
End connection pump housing inner hole oil inlet side, be in institute for placing two bearing holes of sliding bearing in the rear end cap (3)
It states in lubrication cavity two (31),
Wherein, lubrication cavity one (16) connects with first groove (23), the second groove (24) close to front end cover (11)
It is logical, it is in the lubrication cavity one (16) in the front end cover (11) for placing two bearing holes of sliding bearing, institute
It states through-hole (25) and is connected to the lubrication cavity one (16) and lubrication cavity two (31).
2. high viscosity medium lubricating gear pump according to claim 1, which is characterized in that the lubrication cavity one (16)
Including the first son lubrication cavity one (16a) and the second son lubrication cavity one (16b), wherein the first son lubrication cavity one
There are two (16a) is set, two it is described first son lubrication cavity one (16a) respectively with the first groove close to front end cover (11)
(23) it is connected to second groove (24), second son lubrication cavity one (16b) and two first son lubrications cavity one (16a) point
It Tong Guo not be connected in front end cover (11) for placing two bearing holes of sliding bearing, through-hole (25) connection described second
Son lubrication cavity one (16b) and lubrication cavity two (31).
3. high viscosity medium lubricating gear pump according to claim 2, which is characterized in that the lubrication cavity two (31)
Cavity two (31c) is lubricated including the first son lubrication cavity two (31a), the second son lubrication cavity two (31b) and third,
In, it is described first son lubrication cavity two (31a) set there are two, two it is described first son lubrication cavity two (31a) respectively with close to
The first groove (23) of rear end cap (3) is connected to second groove (24), and second son lubricates cavity two (31b) and two first
Son lubrication cavity two (31a) in rear end cap (3) for placing two bearing holes of sliding bearing respectively by being connected to, the third
The oil inlet side of son lubrication cavity two (31c) connection the second son lubrication cavity two (31b) and pump housing inner hole, the through-hole (25)
It is connected to second son lubrication cavity one (16b) and the second son lubrication cavity two (31b).
4. high viscosity medium lubricating gear pump according to any one of claim 1 to 3, which is characterized in that it is described from
Movable gear shaft is located at the lower section of driving gear shaft, wherein the through-hole (25) is only set on the driven gear shaft.
5. high viscosity medium lubricating gear pump according to claim 1, which is characterized in that the oil inlet cavity (13) is in
The cross section of stepped hole shape, the first oil inlet cavity (13a) is T-shaped.
6. high viscosity medium lubricating gear pump according to claim 1, which is characterized in that fuel-displaced cavity (15) packet
Include the first fuel-displaced cavity (15a) and the second fuel-displaced cavity (15b), wherein according to the described in fuel-displaced direction second fuel-displaced cavity (15b)
It is linked in sequence with the first fuel-displaced cavity (15a), the intracavitary volume of the first fuel-displaced cavity (15a) is greater than the second fuel-displaced cavity
(15b), the cavity area of section of the first fuel-displaced cavity (15a) are greater than the cavity area of section of the second fuel-displaced cavity (15b).
7. high viscosity medium lubricating gear pump according to claim 1, which is characterized in that the pump housing (1) is equipped with
Two the first compensating grooves (17), wherein one in two first compensating grooves (17) is in oil inlet side and and oil inlet
(12) it is connected to, another is in oil outlet side and is connected to oil outlet (14).
8. high viscosity medium lubricating gear pump according to claim 7, which is characterized in that set on the rear end cap (3)
There are two the second compensating groove (32), wherein one in two second compensating grooves (32) is in oil inlet side and and oil inlet
Mouth (12) connection, another is in oil outlet side and is connected to oil outlet (14).
9. high viscosity medium lubricating gear pump according to claim 1, which is characterized in that the pump housing (1) and/or after
End cap (3) is alloy iron casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409677.9U CN209704834U (en) | 2019-03-28 | 2019-03-28 | A kind of high viscosity medium lubricating gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920409677.9U CN209704834U (en) | 2019-03-28 | 2019-03-28 | A kind of high viscosity medium lubricating gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209704834U true CN209704834U (en) | 2019-11-29 |
Family
ID=68645953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920409677.9U Withdrawn - After Issue CN209704834U (en) | 2019-03-28 | 2019-03-28 | A kind of high viscosity medium lubricating gear pump |
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| Country | Link |
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| CN (1) | CN209704834U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869310A (en) * | 2019-03-28 | 2019-06-11 | 合肥长源液压股份有限公司 | A kind of high viscosity medium lubricating gear pump |
-
2019
- 2019-03-28 CN CN201920409677.9U patent/CN209704834U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109869310A (en) * | 2019-03-28 | 2019-06-11 | 合肥长源液压股份有限公司 | A kind of high viscosity medium lubricating gear pump |
| CN109869310B (en) * | 2019-03-28 | 2024-04-30 | 合肥长源液压股份有限公司 | Lubricating gear pump for high-viscosity medium |
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Granted publication date: 20191129 Effective date of abandoning: 20240430 |
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| AV01 | Patent right actively abandoned |