CN214499180U - Oil supply system of double-regulating-valve group - Google Patents
Oil supply system of double-regulating-valve group Download PDFInfo
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- CN214499180U CN214499180U CN202022600877.8U CN202022600877U CN214499180U CN 214499180 U CN214499180 U CN 214499180U CN 202022600877 U CN202022600877 U CN 202022600877U CN 214499180 U CN214499180 U CN 214499180U
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Abstract
The utility model discloses an oil supply system of two regulating valves, backing oil pump and main oil pump are parallelly connected, backing oil pump and main oil pump one end communicate with the oil tank respectively, the backing oil pump and the main oil pump other end form the merge point, oil supply system of two regulating valves still includes first governing valve and second governing valve, the settlement pressure of first governing valve is different with the settlement pressure of second governing valve, first governing valve and second governing valve are parallelly connected, one end of first governing valve and second governing valve communicates with the oil tank respectively, another end of first governing valve and second governing valve communicates with the merge point that backing oil pump and main oil pump formed jointly respectively, through the above-mentioned design, when the flow that flows back the oil tank is less, second governing valve work carries out pressure control; when the flow of the flow return oil tank is large, the first regulating valve and the second regulating valve work simultaneously to regulate the pressure, so that the pressure fluctuation is avoided being too violent, and safety accidents are prevented.
Description
Technical Field
The utility model relates to an oil feeding system especially relates to an oil feeding system of two regulating valve groups.
Background
The oil supply system is used as important equipment of the steam turbine, and the main function of the oil supply system is to provide lubricating oil and conditioning oil for the steam turbine. The oil supply system is usually provided with two oil pumps, and the models of the oil pumps are completely the same. After the oil in the oil tank is pumped out by the oil pump, a group of regulating valve groups are arranged at the outlet of the oil pump, and the oil enters the oil cooler and the oil filter after the oil pressure is regulated.
The existing oil supply system meeting the requirements is generally provided with a pressure regulating valve only at a merging outlet of a double-oil pump, and the pressure regulating valve is used for controlling the outlet pressure through partial flow of an outlet of a discharge oil pump. When the single oil pump runs, the regulating valve needs to return to the oil tank through normal return oil quantity; when the double pump is operated, the regulating valve needs to pass the sum of the normal oil return quantity and the oil quantity pumped out by one oil pump. In a small-sized unit, the difference value between the minimum flow and the maximum flow returned by the regulating valve can be controlled within a reasonable range, so that when the valve is selected, a single pressure regulating valve can be used for controlling the pressure at a demand point. However, if the difference between the minimum flow and the maximum flow flowing back to the oil tank through the regulating valve is too large and exceeds the regulating range of the valve, the phenomenon of severe pressure fluctuation is easily caused, and safety accidents are easily induced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide an oil supply system of double regulating valve group, the oil supply system of double regulating valve group can avoid the pressure fluctuation too violent when the minimum flow and the maximum flow difference of the oil tank are too big in the flow return, and the safety accident is prevented.
The utility model discloses an one of the purpose adopts following technical scheme to realize:
the utility model provides an oil feeding system of two governing valves, includes oil tank, reserve oil pump and main oil pump, the reserve oil pump and the main oil pump is parallelly connected, the reserve oil pump and main oil pump one end respectively with the oil tank intercommunication, the reserve oil pump and the main oil pump other end forms the merge point, the oil feeding system of two governing valves still includes first governing valve and second governing valve, the pressure of setting for of first governing valve with the pressure of setting for of second governing valve is different, first governing valve and the second governing valve is parallelly connected, first governing valve and a tip of second governing valve respectively with the oil tank intercommunication, first governing valve and another tip of second governing valve respectively with the reserve oil pump and the merge point intercommunication that the main oil pump forms jointly.
Further, the aperture of the first regulating valve is larger than the aperture of the second regulating valve.
Further, the pressure set point of the first regulator valve is higher than the pressure set point of the second regulator valve.
Further, the first regulating valve and the second regulating valve respectively transmit pressure signals through independent pressure guiding or pressure transmitters.
Further, the oil supply system of two regulating valve groups still includes the bypass valve, bypass valve one end with the oil tank intercommunication, the other end with the reserve oil pump with the merge point intercommunication that the main oil pump formed.
Further, the oil supply system of the double-regulating valve group further comprises an oil cooler, and the oil cooler is communicated with a merging point formed by the backup oil pump and the main oil pump.
Further, the oil supply system of the double regulating valve group also comprises an oil filter, the oil filter is communicated with the oil cooler, and the oil filter is positioned at the output end of the oil supply system of the double regulating valve group.
Compared with the prior art, the utility model discloses two governing valve group's oil feeding system still includes first governing valve and second governing valve, the set pressure of first governing valve is different with the set pressure of second governing valve, first governing valve and second governing valve are parallelly connected, one end of first governing valve and second governing valve communicates with the oil tank respectively, another end of first governing valve and second governing valve communicates with the merge point that reserve oil pump and main oil pump formed jointly respectively, through the above-mentioned design, under the normal operating mode (single pump operation), the flow that flows back the oil tank is less, second governing valve work carries out pressure control; when the large-flow working condition (double-pump operation) is adopted, the flow of the flow return oil tank is large, the first regulating valve and the second regulating valve work simultaneously to regulate the pressure, the pressure fluctuation is avoided being too severe, and safety accidents are prevented.
Drawings
Fig. 1 is the structure diagram of the oil supply system of the double regulating valve group of the present invention.
In the figure: 10. an oil tank; 20. a backup oil pump; 30. a main oil pump; 40. a first regulating valve; 50. a second regulating valve; 60. a bypass valve; 70. an oil cooler; 80. an oil filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Fig. 1 is the oil supply system of the double-regulating valve group of the present invention, which includes an oil tank 10, a backup oil pump 20, a main oil pump 30, a first regulating valve 40, a second regulating valve 50, a bypass valve 60, an oil cooler 70 and an oil filter 80.
The oil tank 10 serves for storing a medium (turbine oil). The main oil pump 30 cooperates with a driving motor to be a power source for normal use of the oil supply system. The backup oil pump 20 is used together with a driving motor as a backup power source for an oil supply system after the failure of the main oil pump 30.
The first regulator valve 40 is pressure signaled by a separate pilot pressure or pressure transducer. The aperture of the first regulating valve 40 is larger than the aperture of the second regulating valve 50. The pressure set point of the first regulator valve 40 is higher than the pressure set point of the second regulator valve 50. The second regulator valve 50 is pressure signaled by a separate pilot pressure or pressure transducer.
When the oil supply system of the double regulating valve group is assembled, the backup oil pump 20 and the main oil pump 30 are connected in parallel. The backup oil pump 20 has one end communicating with the oil tank 10 and the other end forming a merging point with the output end of the main oil pump 30. The main oil pump 30 has one end communicating with the oil tank 10 and the other end forming a merging point with the output end of the backup oil pump 20. The first regulating valve 40, the second regulating valve 50, and the bypass valve 60 are connected in parallel. The first regulator valve 40 has one end communicating with the output of the main oil pump 30 and the output of the backup oil pump 20, and the other end communicating with the oil tank 10. The second regulator valve 50 has one end communicating with the output end of the main oil pump 30 and the output end of the backup oil pump 20, and the other end communicating with the oil tank 10. The bypass valve 60 has one end communicating with the output end of the main oil pump 30 and the output end of the backup oil pump 20, and the other end communicating with the oil tank 10. The oil cooler 70 has one end communicating with the output end of the main oil pump 30 and the output end of the backup oil pump 20, and the other end communicating with the oil filter 80. The oil filter 80 is communicated with the oil cooler 70 at one end and an output end of the oil supply system at the other end.
When the oil supply system with the double regulating valve groups is used and the oil supply system is normally used, the main oil pump 30 works, the amount of oil returning to the oil tank 10 in the oil supply system is small at the moment, and the second regulating valve 50 works to regulate the pressure; when the oil supply system switches pumps, the main oil pump 30 and the backup oil pump 20 work simultaneously, the amount of oil returning to the oil tank 10 in the oil supply system is large at this time, and the first regulating valve 40 and the second regulating valve 50 work simultaneously to regulate the pressure, so that the pressure fluctuation is prevented from being too severe, and safety accidents are prevented.
The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the present invention, several modifications and improvements can be made, all according to the equivalent modifications and evolutions of the present invention, which are made to the above embodiments by the essential technology, and all belong to the protection scope of the present invention.
Claims (7)
1. The utility model provides an oil feeding system of two regulating valve groups, includes oil tank, reserve oil pump and main oil pump, the reserve oil pump and the main oil pump is parallelly connected, the reserve oil pump and main oil pump one end respectively with the oil tank intercommunication, the reserve oil pump and the main oil pump other end forms merging point, its characterized in that: the oil supply system of two governing valves still includes first governing valve and second governing valve, the set pressure of first governing valve with the set pressure of second governing valve is different, first governing valve and the second governing valve is parallelly connected, first governing valve and one end of second governing valve respectively with the oil tank intercommunication, first governing valve and another tip of second governing valve respectively with the reserve oil pump and the common merging point intercommunication that forms of main oil pump.
2. The oil supply system of a double regulating valve group as claimed in claim 1, wherein: the caliber of the first regulating valve is larger than that of the second regulating valve.
3. The oil supply system of a double regulating valve group as claimed in claim 2, wherein: the pressure set point of the first regulator valve is higher than the pressure set point of the second regulator valve.
4. The oil supply system of a double regulating valve group as claimed in claim 1, wherein: the first regulating valve and the second regulating valve are used for transmitting pressure signals through independent pressure guiding or pressure transmitters respectively.
5. The oil supply system of a double regulating valve group as claimed in claim 1, wherein: the oil supply system of the double-regulating-valve group further comprises a bypass valve, one end of the bypass valve is communicated with the oil tank, and the other end of the bypass valve is communicated with a merging point formed by the standby oil pump and the main oil pump.
6. The oil supply system of a double regulating valve group as claimed in claim 1, wherein: the oil supply system of the double-regulating-valve group further comprises an oil cooler, and the oil cooler is communicated with a merging point formed by the standby oil pump and the main oil pump.
7. The oil supply system of a double regulator block of claim 6, wherein: the oil supply system of the double-regulating valve group further comprises an oil filter, the oil filter is communicated with the oil cooler, and the oil filter is positioned at the output end of the oil supply system of the double-regulating valve group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022600877.8U CN214499180U (en) | 2020-11-11 | 2020-11-11 | Oil supply system of double-regulating-valve group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022600877.8U CN214499180U (en) | 2020-11-11 | 2020-11-11 | Oil supply system of double-regulating-valve group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499180U true CN214499180U (en) | 2021-10-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022600877.8U Active CN214499180U (en) | 2020-11-11 | 2020-11-11 | Oil supply system of double-regulating-valve group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499180U (en) |
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2020
- 2020-11-11 CN CN202022600877.8U patent/CN214499180U/en active Active
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