CN205876709U - Gear pump and bypass oil circuit structure thereof - Google Patents
Gear pump and bypass oil circuit structure thereof Download PDFInfo
- Publication number
- CN205876709U CN205876709U CN201620762787.XU CN201620762787U CN205876709U CN 205876709 U CN205876709 U CN 205876709U CN 201620762787 U CN201620762787 U CN 201620762787U CN 205876709 U CN205876709 U CN 205876709U
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- Prior art keywords
- section
- hole
- sealing
- circuit structure
- overflow
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- 238000009434 installation Methods 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims description 43
- 239000012530 fluid Substances 0.000 claims description 28
- 210000004907 gland Anatomy 0.000 claims description 17
- 125000006850 spacer group Chemical group 0.000 claims description 5
- 239000007788 liquid Substances 0.000 abstract description 18
- 238000004891 communication Methods 0.000 abstract description 2
- 230000000903 blocking effect Effects 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000001914 filtration Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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- Rotary Pumps (AREA)
Abstract
The utility model relates to a gear pump and bypass oil circuit structure thereof. The bypass oil path structure includes: the liquid discharge cover comprises a bottom plate and a side wall extending from the periphery of the bottom plate along the axial direction, a liquid discharge port is formed in the bottom plate, an overflow hole is formed in the side wall, an installation part is further arranged on the liquid discharge cover, the installation part is arranged close to the liquid discharge port, part of the installation part is formed in the side wall of the liquid discharge cover, the protruding stretching direction of the installation part is offset relative to the radial direction of the liquid discharge cover, a bypass hole is formed in the installation part in a penetrating mode along the protruding stretching direction of the installation part, the bypass hole is communicated with the liquid discharge port of the liquid discharge cover and the overflow hole, and the overflow regulating valve is movably arranged in the bypass hole and used for blocking communication between the bypass hole and the liquid discharge port. The bypass oil way is compact in structure.
Description
Technical field
This utility model relates to a kind of pumping, particularly relates to a kind of gear pump and bleed off circuit structure thereof.
Background technology
At present, gear pump is a kind of conventional hydraulic pump in Hydraulic Power Transmission System, can nibble by gear mesh form in dividing
Close gear pump and external gear rotary pump two kinds.Internal gear pump includes actuator and gear pair.Gear pair includes gear and gear ring,
Gear is arranged on the main shaft of actuator and its periphery outward has the gear teeth of multiple circular arc, and gear ring is ring-type and inside it
Being formed with multiple engaging tooth, described gear ring is sheathed on described gear, and actuator is rotated by main shaft drive gear, and gear passes through
The gear teeth of its periphery drive gear ring rotating in same direction.When the gear teeth of gear are separated from each other with the engaging tooth of gear ring, understand at the two it
Between cause negative pressure, thus suck liquid.When the gear teeth of gear engage each other with the engaging tooth of gear ring, can just produce between
Pressure, thus liquid is discharged.Be meshed with the gear ring volume in formed space of gear can produce cyclically-varying, when this volume
Change circulation primary, then realize sucking material and discharge material each once.
In order to regulate the hydraulic pressure of gear pump, gear pump the most also includes that bleed off circuit structure, bleed off circuit structure include side
Logical oil circuit regulates valve with overflow.Overflow regulation valve is installed on the housing of gear pump and communicates with the bleed off circuit of gear pump, uses
Hydraulic pressure in regulation gear pump.But, owing to overflow regulation valve convexedly stretches in the outside of gear pump so that gear pump structure more divides
Dissipate, and overflow regulation valve is easily collided.
Utility model content
In view of this, it is necessary to bleed off circuit structure and the gear pump of a kind of compact conformation are provided.
A kind of bleed off circuit structure, including: discharge opeing lid (15) and the overflow regulation valve being installed on described discharge opeing lid (15)
(50), described discharge opeing lid (15) includes base plate (151), the sidewall in axial direction extended from described base plate (151) periphery
(153), described base plate (151) offers leakage fluid dram (1511), described sidewall (153) offers spout hole (156), described
Being additionally provided with installation portion (117) on discharge opeing lid (15), the neighbouring described leakage fluid dram (1511) of described installation portion (117) is arranged and part
Be positioned at the sidewall (153) of described discharge opeing lid (15), described installation portion (117) protrude out the most described discharge opeing in direction lid (15)
Radial direction biases, along self, described installation portion (117) protrudes out that direction is through offers by-pass prot (1551), described by-pass prot
(1551) all communicate with leakage fluid dram (1511) and the described spout hole (156) of described discharge opeing lid (15), described overflow regulation valve
(50) it is installed in actively in described by-pass prot (1551), is used for the company regulating by-pass prot (1551) with described leakage fluid dram (1511)
Logical.
Wherein in an embodiment, described overflow regulation valve (50) includes spool (55) and overflow regulating part (57),
Described by-pass prot (1551) has the Connectivity Section (1553) connected with described leakage fluid dram (1511), and described overflow regulation valve (50) is supported
Being held in one end of described spool (55), the other end of described spool (55) is held in the end face periphery of described Connectivity Section (1553)
On.
Wherein in an embodiment, described spout hole (156) is vertical with described Connectivity Section (1553) to be communicated.
Wherein in an embodiment, described overflow regulation valve (50) also includes gland (51) and valve rod (53), described
Spool (55) is contained in described valve rod (53), and described gland (51) coordinates with described by-pass prot (1551) and presses on described valve
On bar (53), described overflow regulating part (57) is arranged in described gland (51) and convexedly stretches in described valve rod (53), described excessive
Stream regulating part (57) coordinates with described valve rod (53) and supports described spool (55).
Wherein in an embodiment, described by-pass prot (1551) also has seal section (1554), the section of compressing (1555)
And regulation section (1557), described Connectivity Section (1553), described seal section (1554), described in the section of compressing (1555) and described tune
Sections (1557) is sequentially communicated, described in be formed with regulation step between the section of compressing (1555) and described regulation section (1557)
(1558) during, described gland (51) is bolted in described regulation section (1557) and be held on described regulation step (1558).
Wherein in an embodiment, it is formed between described seal section (1554) and the described section of compressing (1555) and compresses
Step, described valve rod (53) includes coaxially connected sealing (531) and pressure section (533), the external diameter of described sealing (531)
Less than the external diameter of described pressure section (533), described pressure section (533) be held in described in compress on step, described sealing (531)
It is arranged in described seal section (1554).
Wherein in an embodiment, described sealing (531) offers sealing hole (534), described pressure section
(533) offer on and compress hole (535), described in compress hole (535) extend in described sealing (531) and with described sealing hole
(534) connection, described in compress the diameter in hole (535) less than the diameter sealing hole (534), described in compress the sidewall shape in hole (535)
Become to compress auxiliary section (536), described overflow regulating part (57) be arranged in described in compress in hole (535) and coordinate with described compressing
Portion (536) threaded engagement, described spool (55) is slideably positioned in described sealing hole (534).
Wherein in an embodiment, described spool (55) includes coaxially connected blockage (551) and sliding part
(553), described sliding part (553) slides in the sealing hole (534) being contained in described valve rod (53), in described blockage (551)
Being formed with sealing surface (555), the diameter of described blockage (551) is more than the diameter of described Connectivity Section (1553), described blockage
(551) sealing surface (555) is held on the end face periphery of described Connectivity Section (1553).
A kind of gear pump, including bleed off circuit structure as above.
Owing to, in bleed off circuit structure, installation portion part is formed in the sidewall of discharge opeing lid, and the side of protruding out of installation portion
To relative discharge opeing lid radial direction bias, reduce installation portion relative to discharge opeing lid protrude out height so that the bypass of gear pump
Oil channel structures is the compactest, also makes gear pump structure the compactest.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, the accompanying drawing in describing below is only
It is embodiments more of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work
Under, it is also possible to the accompanying drawing of other embodiments is obtained according to these accompanying drawings.
Fig. 1 is the schematic perspective view of the gear pump of an embodiment.
Fig. 2 is the generalized section of Fig. 1 gear pump.
Fig. 3 is the end-view of Fig. 1 gear pump partly cut-away；And
Fig. 4 is the enlarged drawing in Fig. 3 at IV.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
A kind of bleed off circuit structure in gear pump, comprising: discharge opeing lid and be installed in the overflow that described discharge opeing covers and adjust
Joint valve, described discharge opeing lid includes base plate, the sidewall in axial direction extended from described base portion peripheral and installation portion, described base plate
On offer leakage fluid dram, described sidewall offers spout hole, described installation portion adjacent to described leakage fluid dram arrange and part be positioned at
In the sidewall of described discharge opeing lid, the radial direction biasing protruding out the most described discharge opeing in direction lid of described installation portion, described peace
Along self, dress portion protrudes out that direction is through offers by-pass prot, the leakage fluid dram of described by-pass prot and described discharge opeing lid and described overflow
Kong Jun communicates, and described overflow regulation valve is installed in described by-pass prot actively, for regulating by-pass prot and described leakage fluid dram
Connection.
Owing to, in bleed off circuit structure, installation portion part is formed in the sidewall of discharge opeing lid, and the side of protruding out of installation portion
To relative discharge opeing lid radial direction bias, reduce installation portion relative to discharge opeing lid protrude out height so that the bypass of gear pump
Oil channel structures is the compactest, also makes gear pump structure the compactest.
Refer to Fig. 1 and Fig. 2, such as, the gear pump 100 of an embodiment, including housing 10, it is arranged at driving in housing 10
Dynamic assembly 20 and the gear pair 30 driving assembly 20 to be connected and the overflow regulation valve 50 being arranged on housing 10.Implement one
In mode, gear pump 100 is crescent gear pump.Such as, gear pump 100 is cycloidal type crescent gear pump.
Housing 10 is cylindric, and it includes main casing 11, the filtration members 13 being arranged at main casing 11 two ends and discharge opeing lid 15,
And the cover plate 17 adjacent to filtration members 13 setting.
Main casing 11 is cylindric, and it includes leading-in end 111 and the outlet side 113 being oppositely arranged.The external diameter of leading-in end 111
External diameter less than outlet side 113.Main casing 11 has been internally formed receiving space 115 and neighbouring leading-in end 111 is provided with installation portion
117, receiving space 115 is separated into the installation cavity 1151 and host cavity 1153 being interconnected by installation portion 117.Installation cavity 1151 shape
The inner side of leading-in end 111, host cavity 1153 is become to be formed at the inner side of outlet side 113.Filtration members 13 is peviform drainage screen, its dress
Leading-in end 111 cover of being located at main casing 11 set installation cavity 1151.Discharge opeing lid 15 is cylindric, and is installed in the row of main casing 11
Go out end 113 and host cavity 1153 is closed.Discharge opeing lid 15 includes base plate 151, the side in axial direction extended from base plate 151 periphery
Wall 153, and the annular connecting portion 154 extended radially outward from sidewall 153 periphery.Base plate 151 gear is located at host cavity 1153
On, annular connecting portion 154 is fixed on the outlet side 113 of main casing 11.See also Fig. 3, base plate 151 is arranged at intervals with
Leakage fluid dram 1511 and connection jaws 1513.Leakage fluid dram 1511 and the center-biased of the equal opposed bottom 151 of connection jaws 1513.Leakage fluid dram
1511 for discharging the liquid in main casing 11, and connection jaws 1513 is used for introducing cable and drives assembly 20 to connect.
Discharge opeing lid 15 also includes the installation portion 155 convexedly stretching on sidewall 153.Installation portion 155 part is formed at discharge opeing lid 15
Sidewall 153 in, and the plane tangent of the end face of installation portion 155 and sidewall 153.Installation portion 155 is placed on discharge opeing lid 15, i.e.
The direction that protrudes out of installation portion 155 biases relative to the radial direction of discharge opeing lid 15.In the present embodiment, installation portion 155 is step
Shape.Seeing also Fig. 4, along protruding out, direction is through offers by-pass prot 1551 to installation portion 155.By-pass prot 1551 and discharge opeing lid 15
Leakage fluid dram 1511 vertically communicate in discharge opeing lid 15.By-pass prot 1551 includes Connectivity Section 1553, the seal section being sequentially communicated
1554, the section of compressing 1555 and regulation section 1557.Connectivity Section 1553 connects with the leakage fluid dram 1511 of discharge opeing lid 15.Connectivity Section
1553, the diameter of seal section 1554, the section of compressing 1555 and regulation section 1557 increases successively.The sidewall surfaces light of seal section 1554
Sliding, it is formed between seal section 1554 and the section of compressing 1555 and compresses step.It is formed between the section of compressing 1555 and regulation section 1557
Regulation step 1558.It is provided with screw thread 1559 on the sidewall of regulation section 1557.It is further opened with overflow on the sidewall 153 of discharge opeing lid 15
Hole 156, spout hole 156 is arranged adjacent to the base plate 151 of discharge opeing lid 15.Spout hole 156 is vertical with the by-pass prot 1551 of installation portion 155
Communicate, and the leakage fluid dram 1511 of relative discharge opeing lid 15 is vertically arranged.In one embodiment, installation portion 155 is adopted with discharge opeing lid 15
Using chimeric design, such as, installation portion 155 is chimeric to be contained in discharge opeing lid 15.Specifically, spout hole 156 and by-pass prot 1551
Seal section 1554 connects, thus is connected with leakage fluid dram 1511 by Connectivity Section 1553.In the present embodiment, spout hole 156 passes through
The sidewall 153 of logical discharge opeing lid 153, to realize being in communication with the outside.
Referring to Fig. 2, drive assembly 20 to include main shaft 23 that actuator is connected with described actuator and two cunnings
Dynamic bearing 25.Actuator is installed on housing 11, and main shaft 23 is installed in host cavity 1153.Two sliding bearings 25 are the most sheathed
In the two ends of main shaft 23 and be installed in main casing 11, it is arranged in host cavity 1153 so that main shaft 23 is rotated.The one of main shaft 23
End is convexly equipped in outside sliding bearing 25 and is arranged in the installation cavity 1151 of main casing 11, thus forms installation end 231.In this enforcement
In mode, actuator is motor.
Gear pair 30 includes internal rotor 31 and the outer rotor 33 cooperated.The installation end of internal rotor 31 fixed main shaft 23
On 231 and be contained in installation cavity 1151.The periphery outward of internal rotor 31 has the gear teeth of multiple circular arc, outer rotor 33 to overlap
It is located on internal rotor 31 and and internal rotor 31 eccentric setting.Outer rotor 33 inner peripheral is formed with multiple engaging tooth.Internal rotor 31
Outer rotor 33 rotating in same direction, a part of gear teeth of internal rotor 31 and the engaging tooth of outer rotor 33 can be driven under the driving of main shaft 23
Away from, thus between the gear teeth and engaging tooth, form negative pressure, to introduce liquid outside filtration members 13.In rotation process, interior turn
Son a part of gear teeth of 31 are meshed with the engaging tooth of outer rotor 33, thus form malleation between the gear teeth and engaging tooth, to incite somebody to action
Liquid discharges main casing 11 from the leakage fluid dram 1511 of discharge opeing lid 15.In the present embodiment, outer rotor 33 is escapement.
Referring to Fig. 3 and Fig. 4, overflow regulation valve 50 is mechanical type overflow valve, and it is installed in the bypass of installation portion 155
In hole 1551.Overflow regulation valve 50 includes gland 51, valve rod 53, spool 55 and overflow regulating part 57.Gland 51 and by-pass prot
Regulation section 1557 threaded engagement of 1551 also presses on valve rod 53, and spool 55 slides and is contained in valve rod 53 and is held in bypass
In the Connectivity Section 1553 in hole 1551.Overflow regulating part 57 be contained in gland 51 and with valve rod 53 threaded engagement.Overflow regulating part
The end of 57 is held in the end of spool 55 and supports dynamics with regulation spool 55 on Connectivity Section 1553.
Gland 51 is circular, and its through offers handle hole 511.The outside of gland 51 is formed with screw part 513.
Gland 51 is installed in the regulation section 1557 of by-pass prot 1551, and screw part 513 mutually screws togather with the screw thread 1559 of regulation section 1557.
Gland 51 can press on the regulation step 1558 between the section of compressing 1555 of by-pass prot 1551 and regulation section 1557, to stop gland
In 51 sections of compressing 1555 entering by-pass prot 1551.
Valve rod 53 is tubular, including coaxially connected sealing 531 and pressure section 533.The external diameter of sealing 531 is less than supporting
The external diameter of splenium 533 so that pressure section 533 can be held between the seal section 1554 of by-pass prot 1551 and the section of compressing 1555
Compress on step, to stop the pressure section 533 of valve rod 53 to enter in the Connectivity Section 1553 of by-pass prot 1551.Sealing 531 center
Offering sealing hole 534, the center of pressure section 533 offers and compresses hole 535, compress in hole 535 extends to sealing 531 and with
Seal hole 534 to connect.Compress the diameter in hole 535 less than the diameter sealing hole 534.Compress the sidewall in hole 535 to be formed to compress and join
Conjunction portion 536.In the present embodiment, mortgage auxiliary section 536 is screw thread.On sealing 531, spacer sleeve is provided with two sealing rings, i.e.
Spacer sleeve is provided with two O, thus increases the tightness 531 sealing property to the seal section 1554 of by-pass prot 1551.
Spool 55 is partially housed in the sealing 531 of valve rod 53.Spool 55 include coaxially connected blockage 551 and
Sliding part 553.Blockage 551 is frustum, and is formed with sealing surface 555 on it.The diameter of blockage 551 is more than by-pass prot
The diameter of the Connectivity Section 1553 of 1551.Blockage 551 is partially housed in Connectivity Section 1553, and the sealing surface of blockage 551
The 555 Connectivity Section 1553 end face peripheries being held in by-pass prot 1551, thus by-pass prot 1551 is sealed.Sliding part 553 slides and sets
It is placed in sealing in hole 534 and the end compressing hole 535 can being held in of valve rod 53.On sliding part 553 spacer sleeve be provided with two close
Seal, is i.e. arranged with two O, thus increases the sliding part 553 sealing property sealing hole 534 to valve rod 53.
Overflow regulating part 57 is contained in the handle hole 511 of gland 51, and with valve rod 53 threaded engagement.Overflow regulating part 57
Surface configuration have regulation auxiliary section 571, regulation one end, auxiliary section 571 be contained in valve rod 53 pressure section 533 compress hole 535
In, and match with compressing auxiliary section 536.In the present embodiment, regulation auxiliary section 571 is joined with compressing auxiliary section 536 screw thread
Close.
Such as, it is provided that a kind of bleed off circuit structure, described bleed off circuit structure includes described discharge opeing lid 15 and described overflow
Regulation valve 50.
Referring to Fig. 1 to Fig. 4, when assembling gear pump 100, driving assembly 20 is installed in housing 10, by gear
It is connected in secondary 30 are contained in housing 10 and with driving assembly 20.During use, start and drive assembly 20 to work with driven gear secondary 30,
Thus produce negative pressure with by liquid, such as oil is in one end suction casing 10.Gear pair 30 also produces malleation by liquid from housing
The other end of 10 is discharged.When needing to regulate the fluid pressure in gear pump 100, rotate the overflow regulating part of overflow regulation valve 50
57, make overflow regulating part 57 be gradually distance from spool 55, the sealing surface 555 of spool 55 by the pressure of liquid in leakage fluid dram 1511,
Thus depart from the leakage fluid dram 1511 away from discharge opeing lid 15.Liquid in leakage fluid dram 1511 flows into the Connectivity Section 1553 of by-pass prot 1551
And enter in the spout hole 5131 on oil channel structures 51, thus discharge the fluid pressure in gear pump 100.
Owing to, in bleed off circuit structure, overflow regulation valve 50 is installed in installation portion 155, and installation portion 155 part shape
In becoming the sidewall 153 of discharge opeing lid 15, and the direction that protrudes out of installation portion 155 biases relative to the radial direction of discharge opeing lid 15, therefore,
Reduce the relative discharge opeing lid 15 of installation portion 155 protrudes out height so that the bleed off circuit structure 50 of gear pump 100 is the compactest.
Therefore, the structure also making gear pump 100 is the compactest.
It addition, when gear pump 100 is cycloid crescent gear pump, it, compared with involute external gear rotary pump, has
Compact conformation, light weight, the advantages such as size is little.And due to gear rotating Vortex, relative sliding velocity is little, abrasion is slight, makes
Using the life-span long, flow pulsation is little, thus pressure fluctuation and noise are the least.Meanwhile, fluid is the most easily full of
Inter-tooth slots, thus allow high-speed gear rotate, volumetric efficiency compared with this gear pump 100 high service life length and flow pulsation little.
Described above the most fully discloses detailed description of the invention of the present utility model.It is pointed out that and be familiar with this neck
Any change that detailed description of the invention of the present utility model is done by the technical staff in territory is all without departing from right of the present utility model
The scope of claim.Correspondingly, the scope of claim of the present utility model is also not limited only to aforementioned specific embodiment party
Formula.
Claims (10)
1. a bleed off circuit structure, it is characterised in that including: discharge opeing lid (15) and be installed on described discharge opeing lid (15) overflow
Stream regulation valve (50), described discharge opeing lid (15) includes base plate (151), in axial direction extends from described base plate (151) periphery
Sidewall (153), described base plate (151) offers leakage fluid dram (1511), described sidewall (153) offers spout hole (156),
Be additionally provided with installation portion (117) on described discharge opeing lid (15), the neighbouring described leakage fluid dram (1511) of described installation portion (117) arrange and
Part is positioned at the sidewall (153) of described discharge opeing lid (15), described installation portion (117) protrude out the most described discharge opeing in direction lid
(15) radial direction biasing, along self, described installation portion (117) protrudes out that direction is through offers by-pass prot (1551), described
By-pass prot (1551) all communicates with leakage fluid dram (1511) and the described spout hole (156) of described discharge opeing lid (15), and described overflow is adjusted
Joint valve (50) is installed in described by-pass prot (1551) actively, is used for regulating by-pass prot (1551) and described leakage fluid dram (1511)
Connection.
2. bleed off circuit structure as claimed in claim 1, it is characterised in that described overflow regulation valve (50) includes spool (55)
With overflow regulating part (57), described by-pass prot (1551) has the Connectivity Section (1553) connected with described leakage fluid dram (1511), institute
Stating overflow regulation valve (50) and be held in one end of described spool (55), the other end of described spool (55) is held in described Connectivity Section
(1553) on end face periphery.
3. bleed off circuit structure as claimed in claim 2, it is characterised in that described spout hole (156) and described Connectivity Section
(1553) vertically communicate.
4. bleed off circuit structure as claimed in claim 2, it is characterised in that described overflow regulation valve (50) also includes gland
(51) with valve rod (53), described spool (55) is contained in described valve rod (53), described gland (51) and described by-pass prot
(1551) coordinating and press on described valve rod (53), described overflow regulating part (57) is arranged in described gland (51) and protrudes out
In described valve rod (53), described overflow regulating part (57) coordinates with described valve rod (53) and supports described spool (55).
5. bleed off circuit structure as claimed in claim 4, it is characterised in that described by-pass prot (1551) also has seal section
(1554), the section of compressing (1555) and regulation section (1557), described Connectivity Section (1553), described seal section (1554), described support
Pressure section (1555) and described regulation section (1557) be sequentially communicated, described between the section of compressing (1555) and described regulation section (1557)
Being formed with regulation step (1558), described gland (51) is bolted in described regulation section (1557) and is held in described regulation step
(1558) on.
6. bleed off circuit structure as claimed in claim 5, it is characterised in that described seal section (1554) and the described section of compressing
(1555) being formed between and compress step, described valve rod (53) includes coaxially connected sealing (531) and pressure section (533),
The external diameter of described sealing (531) less than the external diameter of described pressure section (533), described pressure section (533) be held in described in compress
On step, described sealing (531) is arranged in described seal section (1554).
7. bleed off circuit structure as claimed in claim 6, it is characterised in that offer sealing hole on described sealing (531)
(534), described pressure section (533) offers and compresses hole (535), described in compress hole (535) and extend to described sealing (531)
In and connect with described sealing hole (534), described in compress the diameter in hole (535) diameter less than sealing hole (534), described in compress
The sidewall in hole (535) is formed and compresses auxiliary section (536), described overflow regulating part (57) be arranged in described in compress in hole (535)
And with described auxiliary section (536) threaded engagement that compresses, described spool (55) is slideably positioned in described sealing hole (534).
8. bleed off circuit structure as claimed in claim 7, it is characterised in that described spool (55) includes coaxially connected obstruction
Portion (551) and sliding part (553), described sliding part (553) slides in the sealing hole (534) being contained in described valve rod (53),
Being formed with sealing surface (555) in described blockage (551), the diameter of described blockage (551) is more than described Connectivity Section (1553)
Diameter, the sealing surface (555) of described blockage (551) is held on the end face periphery of described Connectivity Section (1553).
9. bleed off circuit structure as claimed in claim 8, it is characterised in that between the sliding part (553) of described spool (55) is upper
Spacer is provided with two sealing rings, and on the sealing of described valve rod (53), spacer sleeve is provided with two sealing rings.
10. a gear pump, it is characterised in that include bleed off circuit structure as claimed in any one of claims 1-9 wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620762787.XU CN205876709U (en) | 2016-07-19 | 2016-07-19 | Gear pump and bypass oil circuit structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620762787.XU CN205876709U (en) | 2016-07-19 | 2016-07-19 | Gear pump and bypass oil circuit structure thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205876709U true CN205876709U (en) | 2017-01-11 |
Family
ID=57697755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620762787.XU Withdrawn - After Issue CN205876709U (en) | 2016-07-19 | 2016-07-19 | Gear pump and bypass oil circuit structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205876709U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050650A (en) * | 2016-07-19 | 2016-10-26 | 珠海格力电器股份有限公司 | Gear pump and bypass oil circuit structure thereof |
-
2016
- 2016-07-19 CN CN201620762787.XU patent/CN205876709U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106050650A (en) * | 2016-07-19 | 2016-10-26 | 珠海格力电器股份有限公司 | Gear pump and bypass oil circuit structure thereof |
| CN106050650B (en) * | 2016-07-19 | 2018-02-09 | 珠海格力电器股份有限公司 | Gear pump and bypass oil circuit structure thereof |
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| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170111 Effective date of abandoning: 20180209 |