CN202867194U - Double-flange self balancing gear pump - Google Patents
Double-flange self balancing gear pump Download PDFInfo
- Publication number
- CN202867194U CN202867194U CN 201220581433 CN201220581433U CN202867194U CN 202867194 U CN202867194 U CN 202867194U CN 201220581433 CN201220581433 CN 201220581433 CN 201220581433 U CN201220581433 U CN 201220581433U CN 202867194 U CN202867194 U CN 202867194U
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Abstract
The utility model discloses a double-flange self balancing gear pump. The double-flange self balancing gear pump is characterized in that a right inlet pipeline and a left inlet pipeline are collected in an oil inlet main pipe, and the right outlet pipeline and the left outlet pipeline are collected in an oil outlet main pipe; a centre two-stage camber on a pump body cavity is in sliding fit with the excircle of a main gear, and a right large semi-circle arc on a pump body inner cavity is in sliding fit with a right sub-gear excircle; a left large semi-circle arc on the pump body inner cavity is in sliding fit with a left sub-gear excircle, and a driving shaft of a main gear center is parallel with a right driven shaft of a right sub-gear center; a driving shaft of the main gear center is parallel with a left driven shaft of a left sub-gear center, and a flat surface in a rear cover of a rear outer end cover is closely fixed on the rear end face of the pump body; a flat surface in a front cover of a front outer end cover is closely fixed on the front end surface of the pump body, and the frontal flat surface of an end surface compensating disc is simultaneously pasted with a main gear and a right sub-gear as well as a left sub-gear; and a backpressure cavity of the back side of the end surface compensating disc leads to the right outlet pipeline and the left outlet pipeline respectively through a right backpressure channel and a left backpressure channel.
Description
Technical field
The utility model belongs to mechanical engineering field, refers to especially a kind of pair of flange Equilibrium 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: CN1316162C medium-high pressure gear pump having asymmetric double-circular-arc gear shape; China's license notification number: CN1081750C is showed no practicable method and solves the stressed asymmetric of gear pump and end wear gap control problem with internal gear pump of plastic shell etc.
Summary of the invention
The purpose of this utility model provides a kind of pair of flange Equilibrium gear pump, adopts the symmetrical stressed structure of driving gear and end wear compensation isolation technology, realizes simultaneously the technological gap of symmetrical stressed and end wear auto-compensation.
To achieve these goals, the utility model provides following technological scheme:
A kind of pair of flange Equilibrium gear pump, three shafting oil pumps are circumscribed with right inlet ductwork and left inlet ductwork and right export pipeline and left export pipeline, and as improvement: described right inlet ductwork and left inlet ductwork are pooled among the oil-feed house steward with the inlet pipe flange; Described right export pipeline and left export pipeline are pooled to among the fuel-displaced house steward who goes out pipe flange; Described three shafting oil pumps 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 and the pump housing; The two sections arcs in center on the described pump housing chamber and master gear cylindrical are slidingly matched; Right more than half circular arc on the described pump housing inner chamber is slidingly matched from top circle with right; Left more than half circular arc on the 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; 4 to 12 front cover screws are 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; Described end-face compensate dish horizontal frontal plane is pasting master gear and right from gear and left from gear simultaneously; Back pressure cavity between the described end-face compensate dish back side and the described front outer end cap inner side plane is led to right export pipeline and is led to left export pipeline by left back pressure passage by right back pressure passage respectively; And 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 body 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 more than half circular arc of body 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 left 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.
As further improvement: be slidingly matched with through hole before in the front seal ring and driving shaft front end rigion on the described protecgulum inner plane, 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 left driven shaft front end rigion to be slidingly matched, and does not contact bottom surface, front left hole.
As further improvement: be slidingly matched with through hole after in the rear seal ring and driving shaft rear end section on the described bonnet inner plane; 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 left driven shaft rear end section to be slidingly matched, and does not contact bottom surface, rear left hole.
As further improvement: described fuel-displaced house steward's cecum is for going out to manage dish-shaped blind lid; Described oil-feed house steward's cecum is the blind lid of inlet pipe dish.
The beneficial effects of the utility model are: three shafting oil pumps are circumscribed with right inlet ductwork and left inlet ductwork and right export pipeline and left export pipeline, and right inlet ductwork and left inlet ductwork are pooled among the oil-feed house steward with the inlet pipe flange; Right export pipeline and left export pipeline are pooled to among the fuel-displaced house steward who goes out pipe flange; Obtain reasonable Arrangement so that seem complicated spatial pipeline system.Oil-feed house steward's inlet pipe flange arrangement be connected the going out the pipe flange structure and can make things convenient for the utility model to be connected with the front and back system pipeline of house steward.
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 before the band on driving shaft and the protecgulum inner plane in the front long-time effective sealing of through hole do not leak outside.
The axial rebounding force that produces by means of ring and the right ring of air bag and the left ring of air bag in the air bag, 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 utility model is in high-efficiency operation all the time.The utility model 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 utility model plan view, and wherein three shafting oil pumps partly are the sectional view in Q-Q cross section among Fig. 3;
Fig. 2 is the independent reflection three shafting oil pumps of R-R sectional view among Fig. 1, omitted right inlet ductwork and left inlet ductwork be pooled to among the externally threaded oil-feed house steward of inlet pipe and right export pipeline and left export pipeline be pooled to going out to manage among the externally threaded fuel-displaced house steward;
Fig. 3 is the sectional drawing that three shafting oil pumps pass through three axis among Fig. 2;
Fig. 4 is the P-P sectional view among Fig. 3;
Fig. 5 is the back side stereogram of the end-face compensate dish 30 among Fig. 3.
Embodiment
In conjunction with the accompanying drawings and embodiments, further structure of the present utility model and working principle are elaborated:
A kind of pair of flange Equilibrium gear pump, three shafting oil pumps are circumscribed with right inlet ductwork 47 and left inlet ductwork 48 and right export pipeline 49 and left export pipeline 46, and as improvement: described right inlet ductwork 47 and left inlet ductwork 48 are pooled among the oil-feed house steward 74 with inlet pipe flange 77; Described right export pipeline 49 and left export pipeline 46 are pooled to among the fuel-displaced house steward 64 who goes out pipe flange 66; Described three shafting oil pumps 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 and the pump housing 90; 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; 4 to 12 front cover screws 60 are 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; 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; Back pressure cavity 81 between described end-face compensate dish 30 back sides and described front outer end cap 50 inner side plane is led to right export pipeline 49 and is led to left export pipeline 46 by left back pressure passage 83 by right back pressure passage 82 respectively; And 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 65 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 body 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 more than half circular arc 93 of body be slidingly matched.
As further improvement: 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 phases from gear 22 and a left side with right.
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 left 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.
As further improvement: be slidingly matched with driving shaft 11 front end rigions with through hole 51 before in the front seal ring 61 on the described protecgulum inner plane 59, 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 left driven shaft 13 front end rigions to be slidingly matched, and does not contact bottom surface, front left hole 63.
As further improvement: be slidingly matched with driving shaft 11 rear end section with through hole 71 after in the rear seal ring 41 on the described bonnet inner plane 79; 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 left driven shaft 13 rear end section to be slidingly matched, and does not contact bottom surface, rear left hole 43.
As further improvement: described fuel-displaced house steward's 64 cecum is for going out to manage dish-shaped blind lid 99; Described oil-feed house steward's 74 cecum is the blind lid 44 of inlet pipe dish.
Embodiment's installation steps and working principle are described as follows:
Installation steps:
In Fig. 1, Fig. 2, Fig. 3, the oil-feed house steward 74 that embodiment selects described right inlet ductwork 47 and left inlet ductwork 48 to be pooled to inlet pipe flange 77 is arranged in the below; Described right export pipeline 49 and left export pipeline 46 are pooled to the fuel-displaced house steward 64 who goes out pipe flange 66 and are arranged in the top.
The right outlet arc 89 of body is connected with right export pipeline 49; The right import arc 87 of body is connected with right inlet ductwork 47; The left outlet arc 86 of body is connected with left export pipeline 46; The left import arc 88 of body is connected with left inlet ductwork 48.
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 left 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.
Front through hole 51 in the seal ring 61 before the band on the protecgulum inner plane 59 of front outer end cap 50 is slidingly matched with driving shaft 11 front end rigions; Front right blind hole 52 and right driven shaft 12 front end rigions of front outer end cap 50 are slidingly matched, and do not contact bottom surface, front right hole 62; Front left blind hole 53 and left driven shaft 13 front end rigions of protecgulum inner plane 59 are slidingly matched, and do not contact bottom surface, front left hole 63.
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, install.
Working principle:
In conjunction with Fig. 1, Fig. 4, Fig. 5, external force is by main shaft key 17 inputs among the embodiment, turned clockwise by driving shaft 11 related master gears 21, with right intermeshing synchronously from gear 23 from gear 22 and a left side, order 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 and the protecgulum inner plane 59 in front through hole 51 long-time effective sealings do not leak outside.
Oil-feed house steward 74 with inlet pipe flange 77 is diverted to right inlet ductwork 47 and left inlet ductwork 48.Master gear 21 rotation half-turns are sent into the liquid of left inlet ductwork 48 synchronously right export pipeline 49 and the liquid of right inlet ductwork 47 are sent into left export pipeline 46; 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.Right export pipeline 49 and left export pipeline 46 are pooled to the fuel-displaced house steward 64 who goes out pipe flange 66.Go round and begin 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, the back pressure cavity 81 that can use between described end-face compensate dish 30 back sides and described front outer end cap 50 inner side plane is led to right export pipeline 49 and is led to the backpressure that left export pipeline 46 produces by left back pressure passage 83 by right back pressure passage 82 respectively, 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 (7)
1. two flange Equilibrium gear pump, three shafting oil pumps are circumscribed with right inlet ductwork (47) and left inlet ductwork (48) and right export pipeline (49) and left export pipeline (46), it is characterized in that: described right inlet ductwork (47) and left inlet ductwork (48) are pooled among the oil-feed house steward (74) with inlet pipe flange (77); Described right export pipeline (49) and left export pipeline (46) are pooled to among the fuel-displaced house steward (64) who goes out pipe flange (66); Described three shafting oil pumps 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) and the pump housing (90); 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); 4 to 12 front cover screws (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; Back pressure cavity (81) between described end-face compensate dish (30) back side and described front outer end cap (50) inner side plane is led to right export pipeline (49) and is led to left export pipeline (46) by left back pressure passage (83) by right back pressure passage (82) respectively; And 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 (65), 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 body 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 more than half circular arc (93) of body is slidingly matched.
2. a kind of pair of flange Equilibrium 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 pair of flange Equilibrium 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 left driven shaft (13) rear end section to be slidingly matched.
4. a kind of pair of flange Equilibrium 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.
5. a kind of pair of flange Equilibrium gear pump according to claim 1, it is characterized in that: described protecgulum inner plane (59) is upper to be slidingly matched with driving shaft (11) front end rigion with front through hole (51) in the front seal ring (61), and 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 left driven shaft (13) front end rigion to be slidingly matched, and does not contact bottom surface, front left hole (63).
6. a kind of pair of flange Equilibrium gear pump according to claim 1 is characterized in that: is slidingly matched with driving shaft (11) rear end section with rear through hole (71) in the rear seal ring (41) on the described bonnet inner plane (79); 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 left driven shaft (13) rear end section to be slidingly matched, and does not contact bottom surface, rear left hole (43).
7. a kind of pair of flange Equilibrium gear pump according to claim 1, it is characterized in that: described fuel-displaced house steward's (64) cecum is for going out to manage dish-shaped blind lid (99); Described oil-feed house steward's (74) cecum is inlet pipe dish blind lid (44).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220581433 CN202867194U (en) | 2012-10-28 | 2012-10-28 | Double-flange self balancing gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220581433 CN202867194U (en) | 2012-10-28 | 2012-10-28 | Double-flange self balancing gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867194U true CN202867194U (en) | 2013-04-10 |
Family
ID=48033917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220581433 Expired - Fee Related CN202867194U (en) | 2012-10-28 | 2012-10-28 | Double-flange self balancing gear pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867194U (en) |
-
2012
- 2012-10-28 CN CN 201220581433 patent/CN202867194U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20131028 |