CN112780414A - Low-pressure pulsation multi-connection lubricating oil pump set easy to maintain - Google Patents
Low-pressure pulsation multi-connection lubricating oil pump set easy to maintain Download PDFInfo
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- CN112780414A CN112780414A CN202011618241.4A CN202011618241A CN112780414A CN 112780414 A CN112780414 A CN 112780414A CN 202011618241 A CN202011618241 A CN 202011618241A CN 112780414 A CN112780414 A CN 112780414A
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- Prior art keywords
- pump
- oil
- oil supply
- oil return
- shell
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/06—Arrangements of bearings; Lubricating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
- F04C15/0023—Axial sealings for working fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0057—Driving elements, brakes, couplings, transmission specially adapted for machines or pumps
- F04C15/0061—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
- F04C2/102—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member the two members rotating simultaneously around their respective axes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses an easily maintained low-pressure pulsation multi-connected lubricating oil pump set, which comprises a pump set shell, a one-stage oil supply pump, a multi-stage oil return pump, an end cover and a sealing base plate, wherein the oil supply pump, an inner rotor and an outer rotor of the oil return pump are driven by the same transmission shaft, and the oil supply pump and the oil return pump are both arranged in the pump set shell; an end cover is fixed at the left end of the pump unit shell, inlets of a plurality of oil return pumps and outlets of oil supply pumps are arranged on a flange on the right end face of the pump unit shell, the flange is butted with the end face of a pipeline of an engine accessory casing, a sealing base plate is fixed on the flange through a captive screw, and the flange is in threaded connection with the engine accessory casing through the captive screw; the oil supply pump comprises two pairs of rotors, and the two pairs of rotors are arranged at intervals of half a working period in the circumferential direction. The invention improves the product maintainability and outfield maintainability; the pressure and flow pulsation at the outlet of the oil pump are reduced, and the working stability of the lubricating oil system is improved.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of lubricating oil pump sets for an aircraft engine lubricating oil system, in particular to the technical field of low-pressure pulsation multi-connection lubricating oil pump sets which are easy to maintain.
[ background of the invention ]
Most of lubricating oil pump sets adopted by the current aircraft engine lubricating oil system are of a pipeline external connection structure, each stage of pump is independently provided with an inlet pipe joint and an outlet pipe joint, and each pipe joint is independently provided with a sealing ring groove which is sealed by an O-shaped sealing ring; the oil pump set is connected and fastened with the engine accessory casing by adopting a single screw. Each stage of the pump employs a pair of inner and outer rotors.
The prior art has the following defects:
a) the conventional product is characterized in that each stage of pump is independently provided with an inlet pipe joint and an outlet pipe joint, each pipe joint is independently provided with a sealing ring groove which is sealed by adopting an O-shaped sealing ring, the time consumption of external field disassembly and assembly is long, the O-shaped sealing ring is not easy to operate when being assembled, and the O-shaped sealing ring is easy to omit;
b) the product is butted with a system and is connected and fastened with the system by adopting an independent screw, the screw is easy to lose after being detached, and the screw needs to be prepared in advance when being installed and placed at a screw hole, so that the operation steps are multiple, and the consumed time is long;
c) every grade of pump adopts a pair of inner rotor and outer rotor, and every round of pump shaft is rotatory, and pump oil absorption and oil extraction number of times are the same with the outer rotor tooth number, and the transmission shaft receives the impact number of times and the number of times is the same with the outer rotor, and if this product adopts the inner rotor to be 4 teeth, the outer rotor is 5 teeth, forms 5 working chambers, and the pump shaft is rotatory the round, and this pump is 5 oil extraction processes, and the pump shaft bears 5 times and receives the load and assault.
[ summary of the invention ]
The invention aims to solve the problems in the prior art, and provides the low-pressure pulsation multi-connected lubricating oil pump set easy to maintain, which improves the product maintainability and outfield maintainability, and reduces the operation steps of outfield assembly and disassembly and the probability of neglected seal assembly; the pressure and flow pulsation at the outlet of the oil pump are reduced, and the working stability of the lubricating oil system is improved.
In order to achieve the aim, the invention provides an easily-maintained low-pressure pulsation multi-connected lubricating oil pump set which comprises a pump set shell, a one-stage oil supply pump, a multi-stage oil return pump, an end cover and a sealing base plate, wherein an inner rotor and an outer rotor of the oil supply pump and the oil return pump are driven by the same transmission shaft, and the oil supply pump and the oil return pump are arranged in the pump set shell; an end cover is fixed at the left end of the pump unit shell, inlets of a plurality of oil return pumps and outlets of oil supply pumps are arranged on a flange on the right end face of the pump unit shell, the flange is butted with the end face of a pipeline of an engine accessory casing, a sealing base plate is fixed on the flange through a captive screw, and the flange is in threaded connection with the engine accessory casing through the captive screw; the oil supply pump comprises two pairs of rotors, and the two pairs of rotors are arranged at intervals of half a working period in the circumferential direction.
Preferably, an oil supply pipeline shell and an oil return pipeline shell are arranged on the pump set shell, an oil supply inlet of an oil supply pump is arranged at the left upper end of the pump set shell, and an oil return main outlet of the oil return pump is arranged below the middle part of the pump set shell; the flange is provided with oil return inlets of a plurality of oil return pumps and oil supply outlets of the oil supply pump, the oil return inlets and the oil supply outlets are circular holes and are different in size, the oil return inlets are in butt joint with the oil return pipeline shell, and the oil supply outlets are in butt joint with the oil supply pipeline shell; and an oil return inlet is respectively arranged on the front and the back of the cylindrical surface at the right part of the pump unit shell.
Preferably, the number of the oil return pumps is 2-11, and the oil return pumps and the oil supply pump are coaxially and serially arranged on the transmission shaft.
Preferably, a valve plate is arranged between each pair of rotors of the oil supply pump and the oil return pump, and the valve plate is of an I-shaped structure with openings at two ends.
Preferably, the oil supply pump comprises two pairs of rotors, the two pairs of rotors are two pairs of trochoid gears, and the oil return pump comprises a pair of rotors; the number of teeth of the inner rotor and the outer rotor is respectively one of 4 teeth and 5 teeth, 6 teeth and 7 teeth, and 8 teeth and 9 teeth, and working cavities with the same number as the number of teeth of the outer rotor are formed between the inner rotor and the outer rotor.
Preferably, the inner rotor is fixed on the transmission shaft through a transmission key, the transmission key is angularly arranged on the transmission shaft at intervals, and the interval angle α of the transmission key is as follows:
where z is the outer rotor tooth number.
Preferably, the outer rotor is installed inside an eccentric shell, the eccentric shell is fixed in the pump set shell through a positioning pin, and the eccentric shell is a stator.
Preferably, the sealing base plate is fixed on the flange through a captive screw, through holes are formed in the positions, opposite to an inlet of a return oil pump and an outlet of an oil supply pump, of the flange, of the sealing base plate, through holes are also formed in the positions, opposite to the cylindrical surface of the right part of the pump unit shell, of the sealing base plate, a sealing groove is formed in the sealing base plate on the outer side of the through holes, and a vulcanizing ring is formed in the sealing groove through vulcanization of an O-shaped sealing ring.
The invention has the beneficial effects that: according to the product with the lubricating oil pump set structure, the time for installing and disassembling the product in an external field is shortened to 1/5-1/10 of a conventional structure, the phenomenon of sealing ring neglected installation can be basically avoided, the pressure and the flow of oil at the outlet of an oil pump are stable compared with the conventional structure, the pressure and flow pulsation period is reduced to 1/2 of the conventional structure, the pulsation period is reduced to 1/2 of the conventional structure, the working stability of an engine lubricating oil system is improved, and abnormal pressure alarm caused by pressure pulsation is avoided.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a partially exploded perspective view of an easy-to-maintain low pressure pulsation multi-connected oil pump set according to the present invention;
FIG. 2 is a second perspective view of the easy-to-maintain low pressure pulsation multi-connected oil-pump set of the present invention, partially exploded;
FIG. 3 is a cross-sectional view of a scavenge pump of an easy-to-maintain low pressure pulsation multiple lube pump set of the present invention;
FIG. 4 is a side view of an easy to maintain low pressure pulsation multiple lubricant pump package of the present invention;
fig. 5 is a cross-sectional view a-a of fig. 4 of the present invention.
In the figure: 1-pump unit shell, 2-oil supply pump, 3-oil return pump, 4-end cover, 5-sealing cushion plate, 6-inner rotor, 7-outer rotor, 8-transmission shaft, 9-flange, 10-captive screw, 11-oil supply pipeline shell, 12-oil return pipeline shell, 13-oil supply inlet, 14-oil return total outlet, 15-oil return inlet, 16-oil supply outlet, 17-cylindrical surface, 18-working cavity, 19-transmission key, 20-eccentric shell, 21-positioning pin, 22-valve plate, 23-sealing groove, 24-vulcanizing ring and 25-transmission key groove.
[ detailed description ] embodiments
Referring to fig. 1, 2, 3, 4 and 5, the present invention includes a pump set housing 1, a first-stage oil supply pump 2, a multi-stage oil return pump 3, an end cover 4 and a sealing pad 5, wherein the oil supply pump 2, an inner rotor 6 and an outer rotor 7 of the oil return pump 3 are driven by a same transmission shaft 8, and the oil supply pump 2 and the oil return pump 3 are both disposed inside the pump set housing 1; an end cover 4 is fixed at the left end of the pump unit shell 1, inlets of a plurality of oil return pumps 3 and outlets of the oil supply pumps 2 are arranged on a flange 9 on the right end face of the pump unit shell 1, the flange 9 is in butt joint with the end face of a pipeline of an engine accessory case, a sealing base plate 5 is fixed on the flange 9 through a captive screw 10, and the flange 9 is in threaded connection with the engine accessory case through the captive screw 10; the oil supply pump 2 comprises two pairs of rotors, and the two pairs of rotors are arranged at intervals of half a working period in the circumferential direction.
The working process of the invention is as follows:
the invention relates to an easy-to-maintain low-pressure pulsation multi-connected lubricating oil pump set which is explained in the working process by combining with the attached drawings.
The lubricating oil pump set for the lubricating oil system of the aircraft engine is driven by the power of the engine, is arranged on an engine accessory casing and consists of a first-stage oil supply pump 2 and a multi-stage (eight-stage) oil return pump 3, wherein the oil supply pump 2 supplies lubricating oil for each lubricating area (friction pairs such as bearings and gears) of the engine, and the oil return pump pumps the lubricating oil which is lubricated and cooled for each lubricating area back to a lubricating oil tank. The oil return pump 3 of each stage pumps the parts of the oil tank, such as a gear meshing part, a bearing part, a generator and the like, from the oil pool of each lubricated part of the engine after being lubricated and cooled, and is specifically defined by the engine as a whole; different oil return pipe diameters are different, and each stage is designed according to the required flow index; the lubricating oil pump set can be designed into a combination of pumps with different numbers according to different requirements of each model, the oil return pump 3 is used for returning oil, and 2-11 stages can be set according to actual requirements.
The fuel feed pump 2 is two pairs of rotors, and two pairs of rotors circumference arrange and according to the half of fuel feeding cycle, and this product adopts inner rotor 6 to be 4 teeth, and outer rotor 7 is 5 teeth, forms 5 working chambers, and two pairs of rotors oil absorption, oil extraction working chamber interval 360 divide by a distance 5 divide by a distance 2 become 36, consequently, the 19 fillets of drive key differ 36 to arranging, and the drive keyway 25 that corresponds on the transmission shaft 8 differs 36 and offers. Of course, the inner rotor 6 and the outer rotor 7 can also adopt other tooth numbers, and the interval angle alpha of the transmission key 19 can be represented by the formula
Where z is calculated as the number of teeth of outer rotor 7. The oil supply pump 2 and each rotor of each level of oil return pump 3 have an angle difference in the fillet direction according to the formula.
The inner rotor 6 and the outer rotor 7 of each stage of pump are driven by the same transmission shaft 8, structurally connected in series and functionally connected in parallel, wherein the inlet of the six-stage scavenge pump 3 and the outlet of the oil supply pump 2 are arranged on the end face (flange 9) of the lubricating oil pump set, the end face of the lubricating oil pump set is butted with the end face of a pipeline of an engine accessory casing, the sealing structure of each pipeline adopts an integrated design, one sealing base plate 5 is adopted, and the sealing base plate 5 is provided with a sealing ring sealing structure at each pipeline.
The fastening screw at the joint of the flange 9 of the lubricating oil pump set and the system is connected with the lubricating oil pump set by adopting a mooring structure, so that the fastening screw is not easy to fall off, and the fastening screw and the pump are always an assembly before installation and after disassembly, thereby preventing the screw from being lost.
The oil supply pump 2 supplies lubricating oil for each lubricating area of the engine through a nozzle, working pressure is high, pressure pulsation of lubricating oil is high, power consumption is high, the oil supply pump 2 adopts two pairs of separated rotors, and the rotors are arranged at intervals in a half working period in the circumferential direction, so that the stability of working oil is improved, and the load impact of the pressure pulsation and a transmission shaft is reduced.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides an easily maintain low pressure pulsation many joint lubrication oil pump package which characterized in that: the oil supply pump comprises a pump set shell (1), a first-stage oil supply pump (2), a multi-stage oil return pump (3), an end cover (4) and a sealing base plate (5), wherein the oil supply pump (2) and an inner rotor (6) and an outer rotor (7) of the oil return pump (3) are driven by a same transmission shaft (8), and the oil supply pump (2) and the oil return pump (3) are both arranged inside the pump set shell (1); an end cover (4) is fixed at the left end of the pump set shell (1), inlets of the oil return pumps (3) and outlets of the oil supply pumps (2) are arranged on a flange (9) on the right end face of the pump set shell (1), the flange (9) is in butt joint with the end face of a pipeline of an engine accessory casing, a sealing base plate (5) is fixed on the flange (9) through a captive screw (10), and the flange (9) is in threaded connection with the engine accessory casing through the captive screw (10); the oil supply pump (2) comprises two pairs of rotors, and the two pairs of rotors are arranged at intervals of half a working period in the circumferential direction.
2. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: an oil supply pipeline shell (11) and an oil return pipeline shell (12) are arranged on the pump set shell (1), an oil supply inlet (13) of the oil supply pump (2) is formed in the upper left end of the pump set shell (1), and an oil return main outlet (14) of the oil return pump (3) is formed in the lower middle of the pump set shell (1); the flange (9) is provided with a plurality of oil return inlets (15) of the oil return pump (3) and oil supply outlets (16) of the oil supply pump (2), the oil return inlets (15) and the oil supply outlets (16) are circular holes and are different in size, the oil return inlets (15) are in butt joint with the oil return pipeline shell (12), and the oil supply outlets (16) are in butt joint with the oil supply pipeline shell (11); an oil return inlet (15) is respectively arranged on the front and the back of the cylindrical surface (17) at the right part of the pump unit shell (1).
3. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: the number of the oil return pumps (3) is 2-11, and the oil return pumps (3) and the oil supply pump (2) are coaxially and serially arranged on the transmission shaft (8).
4. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: and a valve plate (22) is arranged between each pair of rotors of the oil supply pump (2) and the oil return pump (3), and the valve plate (22) is of an I-shaped structure with openings at two ends.
5. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: the oil supply pump (2) comprises two pairs of rotors, the two pairs of rotors are two pairs of cycloidal gears, and the oil return pump (3) comprises a pair of rotors; the number of teeth of the inner rotor (6) and the outer rotor (7) is respectively one of 4 teeth and 5 teeth, 6 teeth and 7 teeth, and 8 teeth and 9 teeth, and working cavities (18) with the same number as the number of teeth of the outer rotor (7) are formed between the inner rotor (6) and the outer rotor (7).
6. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 5, wherein: inner rotor (6) are fixed on transmission shaft (8) through drive key (19), and drive key (19) angular interval arranges on transmission shaft (8), and the interval angle alpha of drive key (19) is:
wherein z is the number of teeth of the outer rotor (7).
7. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: the outer rotor (7) is installed inside the eccentric shell (20), the eccentric shell (20) is fixed in the pump set shell (1) through a positioning pin (21), and the eccentric shell (20) is a stator.
8. The easy-to-maintain low-pressure-pulsation multi-connected lubricating oil pump set as claimed in claim 1, wherein: the seal gasket (5) is fixed on the flange (9) through a captive screw (10), through holes are formed in positions, opposite to the inlet of the oil return pump (3) and the outlet of the oil supply pump (2), on the flange (9), of the seal gasket (5), through holes are also formed in positions, opposite to the cylindrical surface (17) of the right part of the pump unit shell (1), of the seal gasket (5), a seal groove (23) is formed in the seal gasket (5) on the outer side of the through holes, and a vulcanizing ring (24) is formed in the seal groove (23) through vulcanization of an O-shaped seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011618241.4A CN112780414B (en) | 2020-12-31 | 2020-12-31 | Low-pressure pulsation multi-connection lubricating oil pump set easy to maintain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011618241.4A CN112780414B (en) | 2020-12-31 | 2020-12-31 | Low-pressure pulsation multi-connection lubricating oil pump set easy to maintain |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112780414A true CN112780414A (en) | 2021-05-11 |
| CN112780414B CN112780414B (en) | 2022-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011618241.4A Active CN112780414B (en) | 2020-12-31 | 2020-12-31 | Low-pressure pulsation multi-connection lubricating oil pump set easy to maintain |
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| CN (1) | CN112780414B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060522A (en) * | 2021-11-10 | 2022-02-18 | 浙江环誉泵业科技有限公司 | Independent floating type static ring with compact structure and mechanical seal comprising same |
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| CN203499821U (en) * | 2013-09-03 | 2014-03-26 | 中国航空工业集团公司沈阳发动机设计研究所 | Air blocking prevention structure of hollow pump shaft |
| CN203500810U (en) * | 2013-09-03 | 2014-03-26 | 中国航空工业集团公司沈阳发动机设计研究所 | Two-stage plug-in lubricating pump unit |
| US20150337731A1 (en) * | 2013-01-18 | 2015-11-26 | United Technologies Corporation | Oil pump transfer plate |
| US20170211572A1 (en) * | 2016-01-26 | 2017-07-27 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg | Oil pump |
| CN210564780U (en) * | 2019-07-19 | 2020-05-19 | 中国航发沈阳发动机研究所 | Multistage series aviation oil pump with mistake proofing function |
| CN211777635U (en) * | 2019-11-05 | 2020-10-27 | 新乡航空工业(集团)有限公司 | Structure capable of realizing axial oil outlet of tail part of lubricating oil pump |
-
2020
- 2020-12-31 CN CN202011618241.4A patent/CN112780414B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150337731A1 (en) * | 2013-01-18 | 2015-11-26 | United Technologies Corporation | Oil pump transfer plate |
| CN203499821U (en) * | 2013-09-03 | 2014-03-26 | 中国航空工业集团公司沈阳发动机设计研究所 | Air blocking prevention structure of hollow pump shaft |
| CN203500810U (en) * | 2013-09-03 | 2014-03-26 | 中国航空工业集团公司沈阳发动机设计研究所 | Two-stage plug-in lubricating pump unit |
| US20170211572A1 (en) * | 2016-01-26 | 2017-07-27 | Brose Fahrzeugteile Gmbh & Co. Kommanditgesellschaft, Wuerzburg | Oil pump |
| CN210564780U (en) * | 2019-07-19 | 2020-05-19 | 中国航发沈阳发动机研究所 | Multistage series aviation oil pump with mistake proofing function |
| CN211777635U (en) * | 2019-11-05 | 2020-10-27 | 新乡航空工业(集团)有限公司 | Structure capable of realizing axial oil outlet of tail part of lubricating oil pump |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060522A (en) * | 2021-11-10 | 2022-02-18 | 浙江环誉泵业科技有限公司 | Independent floating type static ring with compact structure and mechanical seal comprising same |
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| Publication number | Publication date |
|---|---|
| CN112780414B (en) | 2022-10-28 |
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Denomination of invention: A low pressure pulsation multiple lubricating oil pump set that is easy to maintain Effective date of registration: 20230530 Granted publication date: 20221028 Pledgee: Zhejiang Haining Rural Commercial Bank Co.,Ltd. Pledgor: Zhejiang Huanyu Pump Technology Co.,Ltd. Registration number: Y2023980042214 |