CN102878071A - Special gear pump - Google Patents
Special gear pump Download PDFInfo
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- CN102878071A CN102878071A CN2012103948098A CN201210394809A CN102878071A CN 102878071 A CN102878071 A CN 102878071A CN 2012103948098 A CN2012103948098 A CN 2012103948098A CN 201210394809 A CN201210394809 A CN 201210394809A CN 102878071 A CN102878071 A CN 102878071A
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Abstract
A special gear pump comprises a drive shaft, a right driven shaft, a left driven shaft, a main gear, a right driven gear, a left driven gear, a front outer end cover, a rear outer end cover, an intermediate conical spring, a right conical spring, a left conical spring and a pump body, wherein the improvement is that two central sections of arcs of an inner cavity of the pump body are in slide fit with an excircle of the main gear, a right large semi-arc of the inner cavity of the pump body is in slide fit with the excircle of the right driven gear, and a left large semi-arc of the inner cavity of the pump body is in slide fit with the excircle of the left driven gear; the drive shaft in the center of the main gear is parallel to the right driven shaft in the center of the right driven gear, and is also parallel to the left driven shaft in the center of the left driven gear; an inner plane of a rear cover of the rear outer end cover is closely fixed on the rear end face of the pump body; the inner plane of the front cover of the front outer end cover is closely fixed on the front end face of the pump body; and the right plane of a compensating disc on the end face is attached to the gear, the right driven gear and the left driven gear at the same time, and the intermediate conical spring, the right conical spring and the left conical spring are respectively arranged between the back side of the compensating disc on the end face and an inner plane of a front outer end.
Description
Technical field
The invention belongs to mechanical engineering field, International Classification of Patents is the F04D non-varactor pump, relate to a kind of with mechanical energy be converted to fluid pressure can the transformation of energy rotary volume pump, refer to especially a kind of special gear pump.
Background technique
Known gear pump all is that the mated gear pump is being worked, because inlet outlet pressure differential is larger, certainly will cause gear one-sided stressed, particularly driving gear is one-sided stressed, directly cause the driving gear shaft place uneven wear of going ahead of the rest to reveal, cause the gear pump life-span short, boost in pressure is restricted.Perplex gear pump always and can not get effective problem that solves in addition: behind the long-term high speed operation, must wearing and tearing of its end face can not get effective compensation.China's license notification number: CN1059019C pendulum rotary vane pump; China's license notification number: CN100374725C rotating vane pump; China's license notification number: CN1316162C medium-high pressure gear pump having asymmetric double-circular-arc gear shape; China's license notification number: CN1081750C is with the internal gear pump of plastic shell; China's license notification number: CN101120175B and China's license notification number: a CN101403382B gear pump for micro-miniature turbojet engine etc. are showed no practicable method and solve the stressed asymmetric of gear pump and end wear gap control problem.
Summary of the invention
The purpose of this invention is to provide a kind of special gear pump, adopt the symmetrical stressed structure of driving gear and end wear compensation isolation technology, to realize simultaneously the technological gap of symmetrical stressed and end wear auto-compensation.
To achieve these goals, the invention provides following technological scheme:
A kind of special gear pump, comprise driving shaft, right driven shaft, left driven shaft, master gear, right from gear, left from gear, front outer end cap, rear outer end cap, volute spring, right volute spring, left volute spring, the pump housing, as improvement: the two sections arcs in the center of described pump housing inner chamber and master gear cylindrical are slidingly matched; Right more than half circular arc of described pump housing inner chamber is slidingly matched from top circle with right; Left more than half circular arc of described pump housing inner chamber is slidingly matched from top circle with left; The driving shaft at described master gear center parallels with the right driven shaft of the described right side from Gear center; The driving shaft at described master gear center parallels with the left driven shaft of a described left side from Gear center; 4 to 12 rear end cover screws are fixed on described pump housing ear end face from the bonnet counterbore with the bonnet inner plane of described rear outer end cap is airtight; The front cover screw is fixed on described pump housing front-end face from the protecgulum counterbore with the protecgulum inner plane of described front outer end cap is airtight after 4 to 12; Described end-face compensate dish horizontal frontal plane is pasting master gear and right from gear and left from gear simultaneously; The described end-face compensate dish back side and described front outer end cap inner side plane and between middle volute spring and right volute spring and left volute spring are arranged respectively.
As further improvement: from gear with leftly equate from the gear width, 180 spend from gear and left being meshed apart from gear synchronous with right by described master gear with right for described master gear.
As further improvement: described bonnet inner plane is pasting master gear and right from gear and left ear end face from gear simultaneously; Through hole and driving shaft rear end section are slidingly matched after during described bonnet inner plane has; Described bonnet inner plane has rear right blind hole and right driven shaft rear end section to be slidingly matched; Described bonnet inner plane has rear left blind hole and right driven shaft rear end section to be slidingly matched.
As further improvement: described end-face compensate dish horizontal frontal plane is pasting master gear and right from gear and left front-end face from gear simultaneously; Have respectively in the dish scrobicular ring isolation be fixed wtih middle volute spring larger diameter end on the described end-face compensate dish back side, coil right scrobicular ring isolation and be fixed wtih right volute spring larger diameter end, the scrobicular ring of facing left isolation is fixed wtih left volute spring larger diameter end.
As further improvement: volute spring and right volute spring and left volute spring smaller diameter end during described protecgulum inner plane is pasting simultaneously; Have on the described protecgulum inner plane seal ring before the band in before through hole and driving shaft front end rigion be slidingly matched, the driving shaft front end rigion passes through outside front outer end cap and has located main shaft key; Described protecgulum inner plane has front right blind hole and right driven shaft front end rigion to be slidingly matched, and does not contact bottom surface, front right hole; Described protecgulum inner plane has front left blind hole and right driven shaft front end rigion to be slidingly matched, and does not contact bottom surface, front left hole.
As further improvement: have on the described bonnet inner plane seal ring behind the band in after through hole and driving shaft rear end section be slidingly matched; Described bonnet inner plane has rear right blind hole and right driven shaft rear end section to be slidingly matched, and does not contact bottom surface, rear right hole; Described bonnet inner plane has rear left blind hole and right driven shaft rear end section to be slidingly matched, and does not contact bottom surface, rear left hole.
As further improvement: the middle-end section was slidingly matched before described end-face compensate dish had compensating disc mesopore and driving shaft; The middle-end section was slidingly matched before described end-face compensate dish had the right hole of compensating disc and right driven shaft; Described end-face compensate dish has the compensation front middle-end section of hole and left driven shaft of facing left to be slidingly matched; Two sections arcs of the disk center that described end-face compensate dish is placed outward, the right outlet arc of dish, the right import arc of dish, the outlet arc of facing left, face left import arc and the right more than half circular arc of dish, more than half circular arc of facing left are slidingly matched with the right more than half circular arc of the two sections arcs in center, the right outlet arc of body, the right import arc of body, the left outlet arc of body, the left import arc of body and the body of described pump housing inner chamber, the left outlet arc of body respectively.
As further improvement: the right outlet arc of described body is connected with right export pipeline; The right import arc of described body is connected with right inlet ductwork; The left outlet arc of described body is connected with left export pipeline; The left import arc of described body is connected with left inlet ductwork.
The invention has the beneficial effects as follows: adopt three gears to reach the compact structure of twice flow, so that the symmetrical stressed complete equilibrium that obtains of master gear in the middle of being positioned at, guarantee uniquely to be in the main gear shaft long-time running of motive sealing sealing state without wearing and tearing.It is much no matter to pass in and out pipeline pressure reduction, master gear is meshed from gear synchronous from gear and a left side with right at a distance of 180 degree, the overall stressed complete equilibrium that obtains of master gear, wearing and tearing, also full symmetric is even, can keep master gear and right from gear and left from leaking in the long-time pressurize operation between the gear, and guarantee seal ring (61) before the band on driving shaft 11 and the protecgulum inner plane in before the long-time effective sealing of through hole do not leak outside.
The axial rebounding force that produces by means of middle volute spring and right volute spring and left volute spring, so that the horizontal frontal plane of end-face compensate dish is close to master gear and right from gear and left front-end face from gear simultaneously, force master gear and the right side to be close to the bonnet inner plane from gear and a left side from the ear end face of gear, guarantee that the present invention is in high-efficiency operation all the time.The present invention realizes also possessing simultaneously radial force balancing technique and axial end wear compensation gap control technology, and is novel, simple in structure, the convenient manufacturing, and the market application potential is huge.
Description of drawings
Fig. 1 is the whole sectional drawing by three main axiss of the present invention;
Fig. 2 is the P-P sectional view among Fig. 1;
Fig. 3 is the sectional view in Q-Q cross section among Fig. 1;
Fig. 4 is the back side stereogram of the end-face compensate dish 40 among Fig. 1;
Fig. 5 is R-R sectional view among Fig. 4.
Embodiment
In conjunction with the accompanying drawings and embodiments, further structure of the present invention and working principle are elaborated:
A kind of special gear pump, comprise driving shaft 11, right driven shaft 12, left driven shaft 13, master gear 21, right from gear 22, left from gear 23, front outer end cap 50, rear outer end cap 70, volute spring 81, right volute spring 82, left volute spring 83, the pump housing 90, as improvement: the two sections arcs in center 91 on the described pump housing 90 inner chambers are slidingly matched with master gear 21 cylindricals; Right more than half circular arc 92 on the described pump housing 90 inner chambers is slidingly matched from gear 22 cylindricals with right; Left more than half circular arc 93 on the described pump housing 90 inner chambers is slidingly matched from gear 23 cylindricals with left; The driving shaft 11 at described master gear 21 centers parallels with the right driven shaft 12 of the described right side from gear 22 centers; The driving shaft 11 at described master gear 21 centers parallels with the left driven shaft 13 of a described left side from gear 23 centers; 4 to 12 rear end cover screws 40 are from bonnet inner plane 79 airtight the be fixed on described pump housing after 90s end faces of bonnet counterbore 76 with described rear outer end cap 70; Front cover screw 60 is fixed on the described pump housing 90 front-end faces from protecgulum counterbore 56 with the protecgulum inner plane 59 of described front outer end cap 50 is airtight after 4 to 12; Described end-face compensate dish 30 horizontal frontal planes are pasting master gear 21 and right from gear 22 and left from gear 23 simultaneously; Described end-face compensate dish 30 back sides and described front outer end cap 50 inner side plane and between middle volute spring 81 and right volute spring 82 and left volute spring 83 are arranged respectively.
As further improvement: described master gear 21 with right from gear 22 with leftly equate from gear 23 width, described master gear 21 with right from gear 22 with leftly spend at a distance of 180 from the engagement of gear 23 locking phases.
As further improvement: described bonnet inner plane 79 is pasting master gear 21 and right from gear 22 and left ear end face from gear 23 simultaneously; Through hole 71 is slidingly matched with driving shaft 11 rear end section after during described bonnet inner plane 79 has; Described bonnet inner plane 79 has rear right blind hole 72 and right driven shaft 12 rear end section to be slidingly matched; Described bonnet inner plane 79 has rear left blind hole 73 and right driven shaft 13 rear end section to be slidingly matched.
As further improvement: described end-face compensate dish 30 horizontal frontal planes are pasting master gear 21 and right from gear 22 and left front-end face from gear 23 simultaneously; Have respectively in the dish scrobicular ring 37 isolation be fixed wtih middle volute spring 81 larger diameter end on described end-face compensate dish 30 back sides, coil right scrobicular ring 38 isolation and be fixed wtih right volute spring 82 larger diameter end, scrobicular ring 39 isolation of facing left are fixed wtih left volute spring 83 larger diameter end.
As further improvement: volute spring 81 and right volute spring 82 and left volute spring 83 smaller diameter end during described protecgulum inner plane 59 is pasting simultaneously; Have on the described protecgulum inner plane 59 seal ring 61 before the band in before through hole 51 be slidingly matched with driving shaft 11 front end rigions, driving shaft 11 front end rigions pass through outside front outer end cap 50 and have located main shaft key 17; Described protecgulum inner plane 59 has front right blind hole 52 and right driven shaft 12 front end rigions to be slidingly matched, and does not contact bottom surface, front right hole 62; Described protecgulum inner plane 59 has front left blind hole 53 and right driven shaft 13 front end rigions to be slidingly matched, and does not contact bottom surface, front left hole 63.
As further improvement: have on the described bonnet inner plane 79 seal ring 41 behind the band in after through hole 71 be slidingly matched with driving shaft 11 rear end section; Described bonnet inner plane 79 has rear right blind hole 72 and right driven shaft 12 rear end section to be slidingly matched, and does not contact bottom surface, rear right hole 42; Described bonnet inner plane 79 has rear left blind hole 73 and right driven shaft 13 rear end section to be slidingly matched, and does not contact bottom surface, rear left hole 43.
As further improvement: described end-face compensate dish 30 has compensating disc mesopore 31 and driving shaft 11 front middle-end sections to be slidingly matched; Described end-face compensate dish 30 has the right hole 32 of compensating disc to be slidingly matched with right driven shaft 12 front middle-end sections; Described end-face compensate dish 30 has face left hole 33 of compensation to be slidingly matched with left driven shaft 13 front middle-end sections; Described end-face compensate dish 30 outer two sections arcs 34 of disk center of placing, the right outlet arc 69 of dish, the right import arc 67 of dish, the outlet arc 66 of facing left, face left import arc 68 and the right more than half circular arc 35 of dish, face left more than half circular arc 36 respectively with the described pump housing 90 inner chambers on the right more than half circular arc 92 of the two sections arcs 91 in center, the right outlet arc 89 of body, the right import arc 87 of body, the left outlet arc 86 of body, the left import arc 88 of body and body, the left outlet arc 93 of body be slidingly matched.
As further improvement: the right outlet arc 89 of described body is connected with right export pipeline 49; The right import arc 87 of described body is connected with right inlet ductwork 47; The left outlet arc 86 of described body is connected with left export pipeline 46; The left import arc 88 of described body is connected with left inlet ductwork 48.
Embodiment's installation steps and working principle are described as follows:
Installation steps:
In Fig. 1, it is 17 numbers of teeth that embodiment selects master gear 21, and right respectively is 17 numbers of teeth from gear 22 and a left side from gear 23.8 rear end cover screws 40 place the rear lid gasket 78 airtight described pump housing end faces after 90s that are fixed on from bonnet counterbore 76 with the bonnet inner plane 79 of described rear outer end cap 70.
Through hole 71 passes rear middle seal ring 41 and outer stretching after in the driving shaft 11 rear ends insertion bonnet inner plane 79, right driven shaft 12 rear ends are inserted the rear right blind hole 72 of bonnet inner plane 79 but are not contacted bottom surface, rear right hole 42, and right driven shaft 13 rear ends are inserted the rear left blind hole 73 of bonnet inner plane 79 but do not contacted bottom surface, rear left hole 43.
End-face compensate dish 30 horizontal frontal planes are being pasted master gear 21 and right from gear 22 and left front-end face from gear 23 simultaneously.Compensating disc mesopore 31 and the driving shaft 11 front middle-end sections of end-face compensate dish 30 are slidingly matched, the right hole of the compensating disc of end-face compensate dish 30 32 is slidingly matched with right driven shaft 12 front middle-end sections, and the compensation of end-face compensate dish 30 hole 33 of facing left is slidingly matched with left driven shaft 13 front middle-end sections.
Rear through hole 71 in the seal ring 41 behind the band on the bonnet inner plane 79 of rear outer end cap 70 is slidingly matched with driving shaft 11 rear end section; Rear right blind hole 72 and right driven shaft 12 rear end section of bonnet inner plane 79 are slidingly matched, and do not contact bottom surface, rear right hole 42; Rear left blind hole 73 and right driven shaft 13 rear end section of bonnet inner plane 79 are slidingly matched, and do not contact bottom surface, rear left hole 43.
From protecgulum counterbore 56 the protecgulum inner plane 59 of described front outer end cap 50 is placed with 8 rear end cover screws 60 that front cover gasket 58 is airtight to be fixed on the described pump housing 90 front-end faces.So that protecgulum inner plane 59 is pasting middle volute spring 81 and right volute spring 82 and left volute spring 83 smaller diameter end simultaneously, install.
Working principle:
External force is passed through main shaft key 17 inputs among the embodiment, is turned clockwise by driving shaft 11 related master gears 21, with right intermeshing synchronously from gear 23 from gear 22 and a left side, orders about right from gear 22 and left from gear 23 opposite spins by master gear 21.Right inlet ductwork 47 and left inlet ductwork 48 be feed liquor simultaneously, and right export pipeline 49 and left export pipeline 46 be fluid simultaneously.
It is much no matter to pass in and out pipeline pressure reduction, master gear 21 meshes from gear 23 locking phases with left from gear 22 with right at a distance of 180 degree, the master gear 21 overall stressed complete equilibriums that obtain, wearing and tearing, also full symmetric is even, can keep master gear 21 and right from gear 22 and left from leaking in the long-time pressurize operation between the gear 23, and guarantee seal ring 61 before the band on driving shaft 11 and the protecgulum inner plane 59 in before through hole 51 long-time effective sealings do not leak outside.
The right side is revolved to turn around from gear 22 liquid of right inlet ductwork 47 is sent into right export pipeline 49; A left side is revolved to turn around from gear 23 liquid of left inlet ductwork 48 is sent into left export pipeline 46, goes round and begins again.
After long-time running, master gear 21 and right from gear 22 and left both ends of the surface wearing and tearing from gear 23, can use has respectively in the dish scrobicular ring 37 isolation be fixed wtih middle volute spring 81 larger diameter end on end-face compensate dish 30 back sides, coil right scrobicular ring 38 isolation and be fixed wtih right volute spring 82 larger diameter end, scrobicular ring 39 isolation of facing left are fixed wtih left volute spring 83 larger diameter end.Utilize protecgulum inner plane 59 pasting simultaneously the rebounding force that middle volute spring 81 and right volute spring 82 and left volute spring 83 smaller diameter end produce, force end-face compensate dish 30 horizontal frontal planes pasting simultaneously master gear 21 and right from gear 22 and left front-end face from gear 23, then force master gear 21 and right from gear 22 and the left bonnet inner plane 79 that is pasting simultaneously rear outer end cap 70 from the ear end face of gear 23, guarantee not occur between the long-play ear end face internal leakage, realize high-voltage operation.
Claims (8)
1. special gear pump, comprise driving shaft (11), right driven shaft (12), left driven shaft (13), master gear (21), right from gear (22), left from gear (23), front outer end cap (50), rear outer end cap (70), volute spring (81), right volute spring (82), left volute spring (83), the pump housing (90), it is characterized in that: the two sections arcs in center (91) on the described pump housing (90) inner chamber are slidingly matched with master gear (21) cylindrical; Right more than half circular arc (92) on the described pump housing (90) inner chamber is slidingly matched from gear (22) cylindrical with right; Left more than half circular arc (93) on the described pump housing (90) inner chamber is slidingly matched from gear (23) cylindrical with left; The driving shaft (11) at described master gear (21) center parallels with the right driven shaft (12) of the described right side from gear (22) center; The driving shaft (11) at described master gear (21) center parallels with the left driven shaft (13) of a described left side from gear (23) center; 4 to 12 rear end cover screws (40) from bonnet counterbore (76) with the airtight described pump housing (90) ear end face that is fixed on of the bonnet inner plane (79) of described rear outer end cap (70); After 4 to 12 front cover screw (60) from protecgulum counterbore (56) with the airtight described pump housing (90) front-end face that is fixed on of the protecgulum inner plane (59) of described front outer end cap (50); Described end-face compensate dish (30) horizontal frontal plane is pasting master gear (21) and right from gear (22) and left from gear (23) simultaneously; Described end-face compensate dish (30) back side and described front outer end cap (50) inner side plane and between middle volute spring (81) and right volute spring (82) and left volute spring (83) are arranged respectively.
2. a kind of special gear pump according to claim 1 is characterized in that: described master gear (21) with right from gear (22) and leftly equate from gear (23) width; Described master gear (21) meshes at a distance of 180 degree from gear (23) locking phase from gear (22) and a left side with right.
3. a kind of special gear pump according to claim 1 is characterized in that: described bonnet inner plane (79) is pasting master gear (21) and right from gear (22) and left ear end face from gear (23) simultaneously; Through hole (71) is slidingly matched with driving shaft (11) rear end section after during described bonnet inner plane (79) has; Described bonnet inner plane (79) has rear right blind hole (72) and right driven shaft (12) rear end section to be slidingly matched; Described bonnet inner plane (79) has rear left blind hole (73) and right driven shaft (13) rear end section to be slidingly matched.
4. a kind of special gear pump according to claim 1 is characterized in that: described end-face compensate dish (30) horizontal frontal plane is pasting master gear (21) and right from gear (22) and left front-end face from gear (23) simultaneously; There is respectively scrobicular ring in the dish (37) isolation to be fixed wtih middle volute spring (81) larger diameter end on described end-face compensate dish (30) back side, coil right scrobicular ring (38) isolation and be fixed wtih right volute spring (82) larger diameter end, the scrobicular ring of facing left (39) isolation is fixed wtih left volute spring (83) larger diameter end.
5. a kind of special gear pump according to claim 1 is characterized in that: volute spring (81) and right volute spring (82) and left volute spring (83) smaller diameter end during described protecgulum inner plane (59) is pasting simultaneously; Have on the described protecgulum inner plane (59) seal ring (61) before the band in before through hole (51) and driving shaft (11) front end rigion be slidingly matched, driving shaft (11) front end rigion passes through and located main shaft key (17) outside front outer end cap (50); Described protecgulum inner plane (59) has front right blind hole (52) and right driven shaft (12) front end rigion to be slidingly matched, and does not contact bottom surface, front right hole (62); Described protecgulum inner plane (59) has front left blind hole (53) and right driven shaft (13) front end rigion to be slidingly matched, and does not contact bottom surface, front left hole (63).
6. a kind of gear pump according to claim 1 is characterized in that: have on the described bonnet inner plane (79) seal ring (41) behind the band in after through hole (71) be slidingly matched with driving shaft (11) rear end section; Described bonnet inner plane (79) has rear right blind hole (72) and right driven shaft (12) rear end section to be slidingly matched, and does not contact bottom surface, rear right hole (42); Described bonnet inner plane (79) has rear left blind hole (73) and right driven shaft (13) rear end section to be slidingly matched, and does not contact bottom surface, rear left hole (43).
7. a kind of special gear pump according to claim 1 is characterized in that: described end-face compensate dish (30) has compensating disc mesopore (31) and the front middle-end section of driving shaft (11) to be slidingly matched; Described end-face compensate dish (30) has the right hole of compensating disc (32) and the front middle-end section of right driven shaft (12) to be slidingly matched; Described end-face compensate dish (30) has face left hole (33) and the front middle-end section of left driven shaft (13) of compensation to be slidingly matched; The outer two sections arcs of disk center (34) placed of described end-face compensate dish (30), coil right outlet arc (69), coil right import arc (67), face left and export arc (66), face left import arc (68) and the right more than half circular arc (35) of dish, face left more than half circular arc (36) respectively with the described pump housing (90) inner chamber on the two sections arcs in center (91), the right outlet arc of body (89), the right import arc of body (87), the left outlet arc of body (86), the right more than half circular arc (92) of the left import arc of body (88) and body, the left outlet arc of body (93) is slidingly matched.
8. a kind of special gear pump according to claim 1, it is characterized in that: the right outlet arc of described body (89) is connected with right export pipeline (49); The right import arc of described body (87) is connected with right inlet ductwork (47); The left outlet arc of described body (86) is connected with left export pipeline (46); The left import arc of described body (88) is connected with left inlet ductwork (48).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103948098A CN102878071A (en) | 2012-10-04 | 2012-10-04 | Special gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103948098A CN102878071A (en) | 2012-10-04 | 2012-10-04 | Special gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102878071A true CN102878071A (en) | 2013-01-16 |
Family
ID=47479532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103948098A Pending CN102878071A (en) | 2012-10-04 | 2012-10-04 | Special gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102878071A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266062A (en) * | 2013-10-21 | 2015-01-07 | 哈尔滨东安发动机（集团）有限公司 | Gear oil pump |
| CN107939672A (en) * | 2017-12-21 | 2018-04-20 | 将军烟草集团有限公司 | A kind of quick-fried pearl production equipment feeding system of more water droppers and method of work |
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| CN201908831U (en) * | 2011-01-05 | 2011-07-27 | 山东交通学院海运学院 | Gear pump with three gears |
| CN201953650U (en) * | 2010-09-04 | 2011-08-31 | 安徽理工大学 | Dipolar parallelly-connected gear pump |
| CN202082096U (en) * | 2011-05-31 | 2011-12-21 | 佛山科学技术学院 | Gear pump |
| CN202091188U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Triple external gear pump |
| CN102536795A (en) * | 2011-12-27 | 2012-07-04 | 张意立 | Cone spring compensation gear pump |
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- 2012-10-04 CN CN2012103948098A patent/CN102878071A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201582113U (en) * | 2009-12-25 | 2010-09-15 | 浙江平柴泵业有限公司 | External closed oil pump |
| CN201953650U (en) * | 2010-09-04 | 2011-08-31 | 安徽理工大学 | Dipolar parallelly-connected gear pump |
| CN201908831U (en) * | 2011-01-05 | 2011-07-27 | 山东交通学院海运学院 | Gear pump with three gears |
| CN202091188U (en) * | 2011-05-24 | 2011-12-28 | 博顿液压股份有限公司 | Triple external gear pump |
| CN202082096U (en) * | 2011-05-31 | 2011-12-21 | 佛山科学技术学院 | Gear pump |
| CN102536795A (en) * | 2011-12-27 | 2012-07-04 | 张意立 | Cone spring compensation gear pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104266062A (en) * | 2013-10-21 | 2015-01-07 | 哈尔滨东安发动机（集团）有限公司 | Gear oil pump |
| CN107939672A (en) * | 2017-12-21 | 2018-04-20 | 将军烟草集团有限公司 | A kind of quick-fried pearl production equipment feeding system of more water droppers and method of work |
| CN107939672B (en) * | 2017-12-21 | 2023-10-27 | 将军烟草集团有限公司 | Feeding system for multi-dripper bead blasting production equipment and working method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130116 |
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| RJ01 | Rejection of invention patent application after publication |