CN216896719U - Flow self-adaptive oil system - Google Patents
Flow self-adaptive oil system Download PDFInfo
- Publication number
- CN216896719U CN216896719U CN202220611744.7U CN202220611744U CN216896719U CN 216896719 U CN216896719 U CN 216896719U CN 202220611744 U CN202220611744 U CN 202220611744U CN 216896719 U CN216896719 U CN 216896719U
- Authority
- CN
- China
- Prior art keywords
- oil
- flow
- pipe
- pump
- self
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model discloses a flow self-adaptive oil system, which relates to the technical field of lubricating oil supply systems and comprises an oil tank, a main oil pump and an auxiliary oil pump, wherein the main oil pump and the auxiliary oil pump are communicated with each other through a parallel pipe, the parallel pipe is sequentially communicated with an oil conveying pipe and an oil supply pipe, the oil conveying pipe is communicated with a duplex cooler and a duplex filter, the oil conveying pipe or the oil supply pipe is communicated with a self-operated pressure regulating valve, and the end part of the oil supply pipe is an oil supply port. The self-operated pressure regulating valve has the function of automatically regulating the flow, the main oil pump and the auxiliary oil pump the oil in the oil tank to the duplex cooler and the duplex filter for cooling and filtering, the oil enters the self-operated pressure regulating valve for regulating the flow, the self-operated pressure regulating valve outputs the required flow according to the flow demand of an actual unit, and the required flow is output to the unit through the oil supply port for lubrication. The output flow of the system is non-fixed, and the system can meet the unit with different flow requirements.
Description
Technical Field
The utility model relates to the technical field of lubricating oil supply systems, in particular to a flow self-adaptive oil system.
Background
In order to reduce friction resistance, reduce friction surface temperature and prolong the service life of mechanical equipment, machine set moving parts such as bearings and gears in the mechanical equipment need to be lubricated, and an oil system is an important system for providing lubricating oil for the machine set. In the prior art, an oil system is mostly designed according to the fixed required flow of a unit, namely the existing oil system is a quantitative and constant-pressure system; for the same set of unit with large flow demand span, the oil system with fixed flow cannot meet the unit operation requirement.
SUMMERY OF THE UTILITY MODEL
The utility model aims to: aiming at the existing problems, the flow self-adaptive oil system for the unit meeting different flow requirements by changing output flow is provided.
The technical scheme adopted by the utility model is as follows:
a flow self-adaptive oil system comprises an oil tank, a main oil pump and an auxiliary oil pump which are communicated with the oil tank, wherein the main oil pump and the auxiliary oil pump are communicated with each other through parallel pipes, the parallel pipes are sequentially communicated with an oil delivery pipe and an oil supply pipe, the oil delivery pipe is communicated with a duplex cooler and a duplex filter, the oil delivery pipe or the oil supply pipe is communicated with a self-operated pressure regulating valve, and the end part of the oil supply pipe is an oil supply opening.
Adopt above-mentioned technical scheme, main oil pump and auxiliary oil pump are used for taking out the oil in the oil tank to supply oil port output, lubricate the unit, and duplex cooler and duplex filter are used for cooling and filtering the oil in the oil tank respectively, and the flow valve of relying on oneself possesses the function of automatically regulated flow, relies on pressure, the temperature of the oil of flowing through to work as the energy, through the pressure size of oil, changes self opening size, and then changes the output flow size.
Preferably, the self-operated pressure regulating valve is communicated with an oil delivery pipe close to the oil supply pipe or an oil supply pipe close to the oil supply port; the duplex cooler and the duplex filter are positioned between the parallel pipes and the self-operated pressure regulating valve.
By adopting the technical scheme, the self-operated pressure regulating valve is arranged at a position for ensuring that the flow passing through the self-operated pressure regulating valve is the same as or similar to the flow output from the oil supply port. The duplex cooler and the duplex filter are arranged at positions for ensuring that the oil in the oil tank is cooled and filtered firstly, and then the flow is regulated through the self-operated pressure regulating valve, so that impurities in the oil are prevented from damaging the self-operated pressure regulating valve.
Preferably, the oil tank is also communicated with an accident pump, and the accident pump is communicated with the oil supply pipe through an accident oil pipe; the communication position of the accident oil pipe and the oil supply pipe is positioned between the self-operated pressure regulating valve and the oil supply port.
By adopting the technical scheme, the accident pump is used for starting when the main oil pump and the auxiliary oil pump cannot be used, the oil supply port is ensured to supply oil continuously, and the influence of oil stop on the unit is avoided.
Preferably, the parallel pipe or the oil conveying pipe is communicated with an overflow pipe, and the overflow pipe is communicated with an oil tank; the overflow pipe is provided with a regulating valve.
Adopt above-mentioned technical scheme, under the little condition of flow demand, only need to launch the main oil pump just can satisfy, under the big condition of flow demand, need launch the main oil pump simultaneously and assist the oil pump, and in the twinkling of an eye that two oil pumps launch simultaneously, both meet the department in the parallel pipe, the pressure fluctuation can appear, through the opening size that changes the governing valve this moment, passes through the overflow pipe with unnecessary flow and overflows to the oil tank in, guarantees the even running of system.
Preferably, the oil supply pipe is also communicated with an accumulator group, and the accumulator group comprises a main accumulator and an auxiliary accumulator which are communicated with each other.
By adopting the technical scheme, when the energy accumulator does not work, part of oil with pressure is stored in the energy accumulator, and when the system pressure is reduced, the energy accumulator is started to release the oil stored in the energy accumulator, adjust the system pressure and supplement the oil supply flow of the system.
Preferably, a cooling temperature sensor is arranged on the oil delivery pipe close to the duplex cooler; and a filtering differential pressure transmitter is arranged on the oil delivery pipe close to the duplex filter.
By adopting the technical scheme, the cooling temperature sensor is used for detecting the oil temperature before and after passing through the duplex cooler; the filtering differential pressure transmitter is used for detecting the oil pressure before and after the duplex filter and judging whether the filter element of the duplex filter is blocked according to the oil pressure.
Preferably, the duplex filter is positioned between the duplex cooler and the self-operated pressure regulating valve, and the duplex filter is arranged close to the oil supply pipe.
By adopting the technical scheme, the duplex filter is arranged at a position for preventing the filtered oil from being polluted after passing through the duplex cooler and also preventing the filtered oil from being polluted after passing through the long oil delivery pipe, so that the oil at the oil supply outlet is ensured to contain a small amount of impurities.
Preferably, the main oil pump, the auxiliary oil pump and the accident pump are centrifugal pumps, and the main oil pump, the auxiliary oil pump and the accident pump are all fixed on the oil tank.
Preferably, the oil tank is provided with an electric heater, an oil tank temperature sensor, an oil tank liquid level sensor and an oil tank pressure sensor.
By adopting the technical scheme, the electric heater is used for heating oil in the oil tank, the oil tank temperature sensor is used for detecting the oil temperature in the oil tank in real time, the oil tank liquid level sensor is used for detecting the oil level in the oil tank in real time, and the oil tank pressure sensor is used for detecting the oil pressure in the oil tank in real time.
In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that: the self-operated pressure regulating valve has the function of automatically regulating the flow, the main oil pump and the auxiliary oil pump oil in the oil tank to the duplex cooler and the duplex filter for cooling and filtering, the oil enters the self-operated pressure regulating valve for regulating the flow, and the self-operated pressure regulating valve outputs the required flow according to the flow demand of an actual unit and outputs the required flow to the unit for lubrication through the oil supply port. The output flow of the system is non-fixed, and the unit with different flow requirements can be met.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
The labels in the figure are: the system comprises an oil tank-1, an electric heater-101, an oil tank temperature sensor-102, an oil tank liquid level sensor-103, an oil tank pressure sensor-104, an oil mist removing device-105, a main oil pump-2, a pressure regulating valve-201, an auxiliary oil pump-3, a pressure switch-301, a duplex cooler-4, a cooling temperature sensor-401, a duplex filter-5, a filtering differential pressure transmitter-501, a self-operated pressure regulating valve-6, an accident pump-7, an energy accumulator group-8, a parallel pipe-9, an oil conveying pipe-10, an oil supply pipe-11, an overflow pipe-12, a regulating valve-13 and an accident oil pipe-14.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1, a flow adaptive oil system includes an oil tank 1, a main oil pump 2, an auxiliary oil pump 3, a duplex cooler 4, a duplex filter 5, a self-operated pressure regulating valve 6, an emergency pump 7, and an accumulator group 8.
The lubricating oil has been contained in 1, be provided with electric heater 101 on the oil tank 1, oil tank temperature sensor 102, oil tank level sensor 103, oil tank pressure sensor 104, deoiling fog device 105, electric heater 101 is arranged in heating the oil in 1 oil tank, oil tank temperature sensor 102 is arranged in the oil temperature of real-time detection oil tank 1, oil tank level sensor 103 is arranged in the oil level of real-time detection oil tank 1, oil tank pressure sensor 104 is arranged in the oil pressure of real-time detection oil tank 1, deoiling fog device 105 should collect two kinds of functions in an organic whole of oil mist filtration and high-efficient separation, can clear away granule impurity and atomizing oil smoke in the flue gas, steam, can make again and keep little negative pressure in the oil tank 1, guarantee the unobstructed oil return of unit.
The main oil pump 2 and the auxiliary oil pump 3 are both fixed on the upper portion of the oil tank 1 and are communicated with the oil tank 1 in an immersed mode for pumping oil in the oil tank 1. The main oil pump 2 and the auxiliary oil pump 3 are communicated with each other through a parallel pipe 9, the parallel pipe 9 is sequentially communicated with an oil delivery pipe 10 and an oil supply pipe 11, and the end part of the oil supply pipe 11 is an oil supply port. The pressure regulating valves 201 and the pressure switches 301 are respectively arranged on the parallel pipes 9 at the oil outlet ends of the main oil pump 2 and the auxiliary oil pump 3, the pressure regulating valves 201 are respectively used for regulating the output pressure of the main oil pump 2 and the auxiliary oil pump 3, and the pressure switches 301 are respectively used for detecting whether the pressure of the started main oil pump 2 and the started auxiliary oil pump 3 is normal. The pipe diameter of the parallel pipe 9 is designed and calculated according to the maximum flow working condition.
The oil delivery pipe 10 is communicated with an overflow pipe 12, the communication position of the oil delivery pipe 10 and the overflow pipe is positioned between the parallel pipe 9 and the duplex cooler 4, and the overflow pipe 12 is used for communicating the oil delivery pipe 10 with the oil tank 1; the overflow pipe 12 is provided with a regulating valve 13, and the design of the overflow pipe 12 and the regulating valve 13 is used for meeting the maximum flow of the whole operation of the unit. Under the little condition of flow demand, only need to launch main oil pump 2 and just can satisfy, under the big condition of flow demand, need launch main oil pump 2 and supplementary oil pump 3 simultaneously, and the two oil pumps launch simultaneously in the twinkling of an eye, and both meet the department in parallel pipe 9, the pressure oscillation can appear, through the opening size that changes governing valve 13 this moment, with unnecessary flow through overflow pipe 12 overflow to oil tank 1 in, guarantee the even running of system.
The oil delivery pipe 10 is sequentially communicated with a duplex cooler 4, a duplex filter 5 and a self-operated pressure regulating valve 6; the duplex cooler 4 and the duplex filter 5 are respectively used for cooling and filtering oil in the oil tank 1, and the duplex filter 5 is arranged close to the oil supply pipe 11 and is used for preventing the filtered oil from being polluted after passing through the duplex cooler 4 and also used for preventing the filtered oil from being polluted after passing through the long oil delivery pipe 10, so that the oil at an output oil supply port is ensured to contain a small amount of impurities; the oil firstly passes through the duplex filter 5 and then enters the self-operated pressure regulating valve 6 in sequence, and the sequence is used for preventing impurities in the oil from damaging the self-operated pressure regulating valve 6. The self-operated pressure regulating valve 6 is also arranged close to the oil supply pipe 11 and used for ensuring that the flow passing through the self-operated pressure regulating valve is the same as or similar to the flow output from the oil supply port, the self-operated pressure regulating valve 6 has the function of automatically regulating the flow, works by taking the pressure and the temperature of flowing oil as energy sources, and changes the opening size of the self-operated pressure regulating valve through the pressure of the oil so as to further change the output flow.
The oil inlet and outlet ends of the duplex cooler 4 are provided with cooling temperature sensors 401 for detecting the oil temperature before and after passing through the duplex cooler 4. The oil inlet and outlet ends of the duplex filter 5 are provided with filtering differential pressure transmitters 501, and the filtering differential pressure transmitters 501 are used for detecting the oil pressure before and after the duplex filter 5 and judging whether the filter element of the duplex filter 5 is blocked according to the oil pressure.
The emergency pump 7 is fixed on the upper part of the oil tank 1, is communicated with the oil tank 1 in an immersion mode and is also used for pumping oil in the oil tank 1, and the emergency pump 7 is communicated with the oil supply pipe 11 through an emergency oil pipe 14; the communication position of the accident oil pipe 14 and the oil supply pipe 11 is positioned between the self-operated pressure regulating valve 6 and the oil supply port. The emergency pump 7 is used for starting when the main oil pump 2 and the auxiliary oil pump 3 are stopped and cannot be used when power is cut off, emergency oil supply is carried out on each lubricating point, the unit is ensured to run idle to use oil until the unit is stopped safely, and the influence of oil stop on the unit is avoided.
The accumulator group 8 is communicated with an oil supply pipe 11, and comprises a main accumulator and an auxiliary accumulator which are communicated with each other, the main accumulator and the auxiliary accumulator are similar to a hydraulic spring in nature, when the main accumulator and the auxiliary accumulator do not work, part of oil with pressure is stored in the main accumulator, when the system pressure drops, the main accumulator or the auxiliary accumulator is started, the oil stored in the main accumulator or the auxiliary accumulator is released, the system pressure is adjusted, and the oil supply flow of the system is supplemented.
The main oil pump 2 and the auxiliary oil pump 3 are both centrifugal pumps, and the oil outlet flow of the main oil pump 2 and the auxiliary oil pump 3 is adjusted through a self-operated pressure regulating valve 6 according to the characteristic curve of the centrifugal pumps; under the same pressure head, the main oil pump 2 and the auxiliary oil pump 3 are communicated in parallel to form two centrifugal pumps connected in parallel, the output flow of the two centrifugal pumps is equal to twice of the flow of a single pump, and the total flow after parallel connection is increased but is lower than twice of the flow of the original independent single pump. Therefore, the outlet flow rate of the main oil pump 2 or the auxiliary oil pump 3 should be half of the maximum flow rate when the unit is operated as a whole, i.e. the sum of the flow rates of the main oil pump 2 and the auxiliary oil pump 3 is equal to the maximum flow rate of the system. In addition, the centrifugal pump does not need to be additionally provided with a safety valve according to the characteristics of the centrifugal pump, and the cost is saved.
The duplex cooler 4 comprises two coolers and a switching valve which are connected in parallel, the duplex filter 5 comprises two filters and a switching valve which are connected in parallel, when one cooler or one filter fails, the other cooler or the other filter can be switched to continue working through the switching valve in the running process, shutdown maintenance is not needed, and normal running of the whole system is guaranteed. The specification and size of the duplex cooler 4 and the duplex filter 5 should meet the requirement of the whole unit during operation, namely the requirement of covering the maximum flow working condition.
The oil mist removing devices 105 are two, one is used, the other is standby, online maintenance can be achieved through interlocking control, and normal operation of the whole system is guaranteed.
The self-operated pressure regulating valve 6 is 1098-EGR type or 1098H-EGR type, is the form of pressure control behind the valve, and is used with main oil pump 2 and auxiliary oil pump 3 supporting, under the prerequisite of guaranteeing that the pressure of oil feed port is stable, changes the flow area size of its main valve mouth, the fuel feeding flow of governing system. The adjusting range of the self-operated pressure regulating valve 6 covers the upper limit and the lower limit of the required flow. The working principle is as follows: when the flow area of the main valve port of the self-operated pressure regulating valve 6 is reduced to a preset value, the outlet pressure of the main oil pump 2 and the auxiliary oil pump 3 is increased, so that the flow of the main oil pump 2 and the auxiliary oil pump 3 is reduced; when the flow area of the main valve port of the self-operated pressure regulating valve 6 is increased to a predetermined value, the outlet pressures of the main oil pump 2 and the auxiliary oil pump 3 are caused to be reduced, so that the flow rates of the main oil pump 2 and the auxiliary oil pump 3 are increased. The flow of the main oil pump 2 and the auxiliary oil pump 3 can completely enter each lubricating point, namely the output flow of the main oil pump 2 and the auxiliary oil pump 3 is adapted to the flow required by the unit.
The main energy accumulator and the auxiliary energy accumulator in the energy accumulator group 8 are both air bag type energy accumulators, and have the characteristics of light weight, small size, easy installation, convenient maintenance, small inertia, sensitive reaction and the like.
Compared with a mode of controlling the flow by matching a valve and a control system, the self-operated pressure regulating valve 6 is used as a mode of automatically controlling the flow output of the oil supply port, does not need debugging, and is small in working difficulty and low in cost.
The equipment model selection and operation mode of the system are as follows:
take two different conditions as an example:
the working condition I is as follows: the unit is a compressor, a compressor side gear box and a motor which operate simultaneously, the flow demand is 1500L/min, and the oil supply pressure is 0.25 Mpa;
working conditions are as follows: the unit is a compressor, a motor, a turbine and a gear box which operate simultaneously, the flow demand is 3000L/min, and the oil supply pressure is 0.25 Mpa.
Selecting a type: the main oil pump 2 is selected according to the requirement of the working condition one, and the auxiliary oil pump 3 and the main oil pump 2 have the same parameters; the duplex cooler 4, the duplex filter 5 and the self-operated pressure regulating valve 6 are all selected according to 3000L/min.
The operation mode is as follows: under the working condition, the main oil pump 2 or the auxiliary oil pump 3 is started, and the oil supply pressure is stabilized by the self-operated pressure regulating valve 6.
Under the second working condition, the main oil pump 2 and the auxiliary oil pump 3 are started simultaneously, and the oil supply pressure is stabilized by the self-operated pressure regulating valve 6.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to aid in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. The flow self-adaptive oil system is characterized by comprising an oil tank, a main oil pump and an auxiliary oil pump, wherein the main oil pump and the auxiliary oil pump are communicated with each other through a parallel pipe, the parallel pipe is sequentially communicated with an oil delivery pipe and an oil supply pipe, the oil delivery pipe is communicated with a duplex cooler and a duplex filter, the oil delivery pipe or the oil supply pipe is communicated with a self-operated pressure regulating valve, and the end part of the oil supply pipe is an oil supply opening.
2. The adaptive-flow oil system of claim 1, wherein the self-operated pressure regulating valve is in communication with the oil delivery line proximate the oil supply line or in communication with the oil supply line proximate the oil supply port; the duplex cooler and the duplex filter are positioned between the parallel pipes and the self-operated pressure regulating valve.
3. The flow adaptive oil system of claim 2, wherein the oil tank is further in communication with an emergency pump, the emergency pump being in communication with the oil supply line via an emergency oil line; the communication position of the accident oil pipe and the oil supply pipe is positioned between the self-operated pressure regulating valve and the oil supply port.
4. The flow adaptive oil system of claim 3, wherein the parallel pipe or the oil pipe is communicated with an overflow pipe, and the overflow pipe is communicated with an oil tank; the overflow pipe is provided with a regulating valve.
5. The flow adaptive oil system of claim 4, wherein the oil supply line is further in communication with an accumulator bank, the accumulator bank comprising a primary accumulator and a secondary accumulator in communication with each other.
6. The adaptive-flow oil system of claim 5, wherein a cooling temperature sensor is disposed on the oil line proximate the dual cooler; and a filtering differential pressure transmitter is arranged on the oil delivery pipe close to the duplex filter.
7. The adaptive-flow oil system of claim 6, wherein the duplex filter is positioned between the duplex cooler and the self-operated pressure regulating valve, and the duplex filter is positioned proximate the oil supply line.
8. The flow adaptive oil system of claim 7, wherein the primary oil pump, the secondary oil pump, and the emergency pump are centrifugal pumps, and are all secured to the oil tank.
9. The flow adaptive oil system of claim 8, wherein the oil tank is provided with an electric heater, a tank temperature sensor, a tank level sensor, a tank pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220611744.7U CN216896719U (en) | 2022-03-21 | 2022-03-21 | Flow self-adaptive oil system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220611744.7U CN216896719U (en) | 2022-03-21 | 2022-03-21 | Flow self-adaptive oil system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216896719U true CN216896719U (en) | 2022-07-05 |
Family
ID=82191233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220611744.7U Active CN216896719U (en) | 2022-03-21 | 2022-03-21 | Flow self-adaptive oil system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216896719U (en) |
-
2022
- 2022-03-21 CN CN202220611744.7U patent/CN216896719U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102777756B (en) | Lubricating oil hydraulic system of bulb turbine unit and control method thereof | |
| RU2466286C2 (en) | Method and device for emergency lubrication of engine, engine and transport vehicle containing such emergency lubrication device | |
| CN103672346A (en) | Sliding bearing intelligent oil supply system and method | |
| CN109282028A (en) | Hybrid vehicle hydraulic control system and its control method | |
| EP0426758B1 (en) | Engine lubrication system | |
| CN112160907A (en) | Screw air compressor system of water lubrication bearing and control method thereof | |
| CN201391436Y (en) | Integrated compressor lubricant station | |
| CN216896719U (en) | Flow self-adaptive oil system | |
| CN207093158U (en) | The supporting main oil pump of centrifugal compressor, which is driven, applied to vapour adjusts petrol station for the lubrication that vapour drives | |
| CN213900674U (en) | Lubricating oil station | |
| CN202868265U (en) | Lubrication system of power machine | |
| CN216743770U (en) | Marine large-scale generator bearing lubricating system | |
| CN213808794U (en) | Lubricating system for steering oar | |
| CN215293098U (en) | Hydraulic system oil circuit cooling structure | |
| CN218912980U (en) | Lubricating oil system of steam turbine | |
| CN114199576A (en) | Oil inlet and return condition control system for engine test | |
| CN108087322B (en) | Lubricating system of turbine compressor unit | |
| CN102877890B (en) | Lubrication system of single-screw expansion engine and control method of lubrication system | |
| CN213900675U (en) | Lubricating system of nitric acid reduction supercharger lubricating oil station | |
| CN215256686U (en) | Multifunctional oil supply system | |
| KR20180084096A (en) | Pressure control arrangements and methods | |
| CN219061923U (en) | Water-cooled air compressor | |
| CN212155736U (en) | Marine generator set | |
| CN113019027B (en) | Waterway control system and method for dust suppression vehicle | |
| CN215566643U (en) | Oil mist separation device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |