Pressure regulating device and engine comprising same

Abstract

The application discloses a pressure regulating device and an engine comprising the same, and the pressure regulating device is applied to a damper. The pressure regulating device comprises a fluid channel and first and second pressure regulating valves. The fluid channel comprises a main pipeline, a first pipeline and a second pipeline. The first and second pipelines are communicated with the main pipeline. The first and second pressure regulating valves are arranged on the first and second pipelines respectively. The first pressure regulating valve is always open. The opening degrees of the first and second pressure regulating valves are positively correlated with the pressure of the main pipeline. The first pipeline is communicated with the damper. The second pressure regulating valve is a normally open valve. When hydraulic oil flows in, the normally open valve on the second pipeline can keep other parts except the damper to be supplied with oil. When the oil pressure increases, the first or second pressure regulating valve is opened. The oil from the main pipeline enters the first pipeline, and sufficient oil supply is provided for the damper. When the oil pressure continues to increase, the oil flows through the second pressure regulating valve, the excessive oil accumulation is reduced, the heat of the damper is taken away, and coking is prevented.

Description

Technical Field

[0001] This invention relates to the field of engine hydraulic pressure regulation, and more specifically to a pressure regulating device and an engine including the same. Background Technology

[0002] As the requirements for performance, lifespan, and cost of aero engines continue to increase, the engine structure becomes correspondingly lighter and more flexible, while the load and temperature increase accordingly. Furthermore, with the increase in service time, the rotor imbalance may increase, making engine vibration a challenging problem. Generally, when the engine is at its critical speed, the rotor vibration is relatively large. The vast majority of the engine rotor's operating state and running time are above the first-order critical speed. In addition, in some application scenarios, it is necessary to frequently pass through the so-called critical speed.

[0003] Since the concept of squeeze film dampers was proposed at the end of the 1960s, the research and application of squeeze film dampers have developed rapidly. In order to enable the rotor to pass the critical speed smoothly and reliably, after decades of research and application practice, squeeze film dampers have been applied to various areas that require vibration reduction design. They have successfully started to have a good vibration reduction effect in aero engines and ground gas turbines.

[0004] The main working principle of a compression oil film damper can be briefly described as follows: An oil film gap exists between the bearing cavity and the non-rotating spring support. Oil is filled into this gap to form an oil film. When the spring support journal vibrates, it compresses the oil film, thus producing a damping effect. Many factors affect damping, such as the length of the oil film, the eccentricity of the assembly, and the rotor imbalance. Furthermore, the oil supply pressure also has an impact; for example, insufficient oil supply pressure may cause damper performance degradation, or even prevent the formation of an oil film.

[0005] The oil supply for squeeze film dampers is generally achieved through the engine's internal lubrication system. Currently, the mainstream design for aero-engine lubrication systems primarily employs a full-flow circulation scheme. In this scheme, the lubrication pressure is directly affected by engine speed regulation; that is, the lubrication pressure increases with engine speed. Commonly, the first-order critical speed of the engine rotor is designed to be relatively low. This means that at lower critical speeds, a good squeeze film needs to be formed to achieve vibration damping. Therefore, a sufficiently high oil supply pressure is required to maintain the oil film and ensure the rotor smoothly passes through the critical state. For civil aero-engines, this meets requirements such as long-life bearings, high engine reliability, and low component maintenance costs.

[0006] To ensure a good oil film is formed in the oil film gap, the dimensions of the oil supply pipe diameter and the oil supply orifice diameter are designed to be as small as possible. For rotors located near high-temperature environments such as high-pressure turbines, the surfaces of surrounding components are in a state of being encased in hot air, especially after the engine stops. This heat immersion can often raise the wall temperature to over 200°C. Therefore, in areas where residual oil accumulates in the oil supply circuit for the oil film, the risk of lubricating oil coking is more likely to occur. The mechanism of lubricating oil coking inside the engine is complex and there is no definitive conclusion yet. However, it is certain that lubricating oil coking is often a long-term process that develops and deteriorates under repeated overheating conditions. Once the coking material accumulates, it causes blockage in the oil passages, affecting the damping effect of the damper and ultimately leading to serious damage such as worsening engine vibration in the short term. It should be noted that this is not easily identifiable during short-term engine use. Frequent disassembly, cleaning, and inspection over a long period will significantly increase maintenance costs and reduce the effective service life of the engine.

[0007] In summary, the lack of a pressure regulating device for multiple oil pressures, such as the squeeze film damper, in the lubricating oil system of aero engines leads to problems such as coking in the damper and accumulation of squeeze oil in the pipe. Summary of the Invention

[0008] The technical problem to be solved by the present invention is that the lack of pressure regulation in the lubrication system of aero engines in the prior art causes coking in the damper and accumulation of squeeze oil in the pipe. The present invention provides a pressure regulating device and an engine including the present invention.

[0009] The present invention solves the above-mentioned technical problems through the following technical solution:

[0010] A pressure regulating device, applied to a damper, the pressure regulating device comprising:

[0011] A fluid channel, comprising a main pipeline, a first pipeline, and a second pipeline, wherein both the first pipeline and the second pipeline are connected downstream of the main pipeline;

[0012] A first pressure regulating valve is installed on a first pipeline. The first pressure regulating valve is a normally closed valve, and its opening degree is positively correlated with the pressure of the main pipeline. The first pipeline is used to connect to the damper.

[0013] The second pressure regulating valve is installed on the second pipeline;

[0014] The second pressure regulating valve is a normally open valve, and the opening degree of the second pressure regulating valve is positively correlated with the pressure of the main pipeline.

[0015] In this design, the fluid channels include a main pipeline, a first pipeline, and a second pipeline. A first pressure regulating valve is installed on the first pipeline, and a second pressure regulating valve is installed on the second pipeline. The second pressure regulating valve is a normally open valve. When hydraulic oil flows in the fluid channels, the normally open valve on the second pipeline ensures sufficient oil supply to other mechanical structures besides the damper. When the oil pressure increases, either the first or second pressure regulating valve is opened, and oil enters the first pipeline from the main pipeline, providing sufficient oil supply to the damper and forming an oil film of appropriate thickness inside the damper. When the oil pressure in the main pipeline continues to increase, excess oil can flow through the second pressure regulating valve, reducing the risk of excess oil accumulating in the first pipeline and causing residual oil buildup in the damper. When the oil pressure in the pipeline is high, the amount of oil flowing through the first pipeline per unit time increases, which can carry away the heat generated inside the damper, thereby reducing the oil temperature inside the damper and preventing lubricating oil coking inside the damper. When the engine stops, the oil pressure in the main pipeline decreases, the first pressure regulating valve closes, and the main pipeline stops supplying oil to the damper. Oil will not accumulate at the damper, thus preventing the residual heat of the damper from heating the oil and causing coking.

[0016] Preferably, the first pressure regulating valve includes a first valve orifice, a first valve core, and a first elastic element. The first valve core is located downstream of the first valve orifice and is movable relative to the first valve orifice. The first elastic element is used to provide the first valve core with the elastic force required to abut against the first valve orifice.

[0017] In this solution, the above structure allows the first valve core to be pushed by the oil pressure when the oil pressure in the main pipeline increases, and the oil can enter the damper through the first valve hole.

[0018] Preferably, the second pressure regulating valve includes a second valve orifice, a second valve core, and a second elastic element. The second valve core is located downstream of the second valve orifice and is movable relative to the second valve orifice. The second elastic element is used to provide the second valve core with the elastic force required to abut against the second valve orifice.

[0019] In this solution, the above structure allows the second valve core to be pushed by the oil pressure when the oil pressure in the main pipeline increases, and the oil can enter other lubrication systems except the damper through the second valve orifice.

[0020] Preferably, the first valve core includes a first valve stem and a first head, the first elastic element is sleeved on the first valve stem, one end of the first elastic element abuts against the first head, and the other end of the first elastic element is fixed relative to the first valve hole.

[0021] In this scheme, in the initial state, the deformation of the first elastic element resists the oil pressure in the main pipeline, the first head abuts against the first valve hole, and the first elastic element sleeved on the first valve stem saves the installation space of the first pressure regulating valve.

[0022] Preferably, the first pressure regulating valve further includes a first end cap portion, which is disposed downstream of the first valve hole. The first end cap portion includes a first end cap portion body and a first sleeve with an opening facing the first valve hole. The first sleeve is connected to the first end cap portion body, and the body of the first end cap is connected to the inner wall of the first pipeline. One end of the first valve core abuts against the first valve hole, and the other end of the first valve core is embedded inside the first sleeve. One end of the first elastic member abuts against the first valve core, and the other end of the first elastic member abuts against the first sleeve.

[0023] In this design, the first pressure regulating valve includes a first end cap, which is disposed inside the first sleeve, allowing the other end of the first valve core to move within the first sleeve on the first end cap. This improves the reliability of the movement of the first valve core under the action of fluid, and also makes it easier to set the length of the first elastic element.

[0024] Preferably, the first pressure regulating valve further includes a second sleeve disposed inside the first sleeve, the axial position of the first sleeve relative to the second sleeve is adjustable, one end of the first elastic element abuts against the first valve core, and the other end of the first elastic element abuts against the second sleeve.

[0025] In this solution, the above structure allows the positions of the first sleeve and the second sleeve to be moved relative to each other, which facilitates the adjustment of the elastic force of the first elastic element corresponding to the first pressure regulating valve. The nested structure of the first sleeve and the second sleeve also facilitates the disassembly and installation of the first pressure regulating valve.

[0026] Preferably, the second sleeve is provided with a first step portion.

[0027] In this design, the first step portion inside the second sleeve can prevent the valve stem of the first valve core from detaching from the sleeve, thereby restricting the movement of the first valve stem.

[0028] Preferably, the first end cap body is further provided with a first through hole, the first through hole being such that the first pipeline is connected to the damper.

[0029] In this solution, fluid flowing through the first pressure regulating valve flows into the damper through the first through hole on the first end cap, providing oil to the damper.

[0030] Preferably, the second valve core includes a second valve stem and a second head, the second elastic element is sleeved on the second valve stem, one end of the second elastic element abuts against the second head, and the other end of the second elastic element is fixed relative to the second valve hole.

[0031] In this scheme, in the initial state, the deformation of the second elastic element resists the oil pressure in the main pipeline, the second head abuts against the second valve hole, and the second elastic element sleeved on the second valve stem saves the installation space of the second pressure regulating valve.

[0032] Preferably, the second pressure regulating valve further includes a second end cap, which is disposed downstream of the second valve orifice. The second end cap includes a second end cap body and a third sleeve with an opening facing the second valve orifice. The third sleeve is connected to the second end cap body, and both ends of the third sleeve are always connected. The body of the second end cap is connected to the inner wall of the second pipeline. One end of the second valve core abuts against the second valve orifice, and the other end of the second valve core is embedded inside the third sleeve. One end of the second elastic member abuts against the second valve core, and the other end of the second elastic member abuts against the third sleeve.

[0033] In this design, the second pressure regulating valve includes a second end cap, which is located inside the third sleeve. This allows the other end of the second valve core to move within the third sleeve on the second end cap, improving the reliability of the movement of the second valve core under the action of fluid. At the same time, the length of the second elastic element is also easy to set.

[0034] Preferably, the second pressure regulating valve further includes a fourth sleeve, which is sleeved inside the third sleeve. The axial position of the fourth sleeve relative to the third sleeve is adjustable. One end of the second elastic element abuts against the second valve core, and the other end of the second elastic element abuts against the fourth sleeve.

[0035] In this design, the positions of the third and fourth sleeves can be moved relative to each other, facilitating the adjustment of the elastic force of the second elastic element corresponding to the second pressure regulating valve. The nested structure of the third and fourth sleeves also facilitates the disassembly and installation of the second pressure regulating valve.

[0036] Preferably, the fourth sleeve is provided with a second stepped section.

[0037] In this design, the second step portion inside the fourth sleeve can prevent the valve stem of the second valve core from disengaging from the corresponding sleeve, thereby restricting the movement of the second valve stem.

[0038] Preferably, the second end cap body is further provided with a second through hole, the second through hole being used to connect the second pipeline to the corresponding system.

[0039] In this design, fluid flowing through the second pressure regulating valve is allowed to flow into other lubrication systems through the second through hole on the second end cap.

[0040] Preferably, the second valve core has a third through hole, which connects the second valve hole and the third sleeve.

[0041] In this design, the third through hole on the second valve core connects the second valve hole and the third sleeve, allowing the second pressure regulating valve to remain in a normally open state, facilitating the flow of fluid in the main pipeline.

[0042] Preferably, when the pressure in the main pipeline exceeds a first preset value, the first pressure regulating valve opens; when the pressure in the main pipeline exceeds a second preset value, the opening of the second pressure regulating valve begins to increase; wherein, the first preset value is less than the second preset value.

[0043] In this scheme, when the pressure in the main pipeline exceeds the first preset value, the first pressure regulating valve opens and oil is supplied to the damper. When the oil pressure increases, the second pressure regulating valve opens to prevent the hydraulic oil in the damper from coking. The increased oil pressure reduces the fluid flow rate, improves the efficiency of the fluid in carrying away heat from the damper, reduces the temperature in the damper, and further reduces the possibility of coking in the damper.

[0044] Preferably, the first pressure regulating valve further includes a first elastic element and a first valve core. The first elastic element provides a first elastic force, and the pressure in the main pipeline and the first elastic force together drive the first valve core to reciprocate. The first elastic force is used to provide the first valve core with the force required to balance the pressure in the main pipeline. The second pressure regulating valve further includes a second elastic element and a second valve core. The second elastic element provides a second elastic force, and the pressure in the main pipeline and the second elastic force together drive the second valve core to reciprocate. The second elastic force is used to provide the second valve core with the force required to balance the pressure in the main pipeline. Wherein, when the pressure in the main pipeline is greater than the first preset value and less than the second preset value, the first pressure regulating valve opens; when the pressure in the main pipeline is greater than the second preset value, both the first pressure regulating valve and the second pressure regulating valve open.

[0045] In this design, when the pressure in the main pipeline is greater than the first preset value but less than the second preset value, the first pressure regulating valve opens, and oil begins to enter the damper to generate a corresponding oil film to lubricate the engine. When the pressure in the main pipeline is greater than the second preset value, both the first and second pressure regulating valves open, increasing the flow rate of the fluid in the main pipeline. This allows more heat to be carried away per unit time, preventing the oil in the damper from overheating and causing coking. At the same time, the increased flow rate can prevent oil accumulation in the damper.

[0046] Preferably, the first valve orifice has an inner surface whose cross-sectional area increases along the direction of fluid flow.

[0047] In this design, the inner surface of the first valve orifice increases along the direction of fluid flow, which facilitates the flow of fluid through the first pressure regulating valve when the fluid pressure increases, thereby increasing the flow rate of the first pressure regulating valve.

[0048] An engine comprising the pressure regulating device as described above.

[0049] In this design, the engine includes a pressure regulating device. The fluid passages within the pressure regulating device include a main pipeline, a first pipeline, and a second pipeline. A first pressure regulating valve is installed on the first pipeline, and a second pressure regulating valve is installed on the second pipeline. The second pressure regulating valve is a normally open valve. When hydraulic oil flows through the fluid passages, the normally open valve on the second pipeline ensures sufficient oil supply to other mechanical structures besides the damper. When the oil pressure increases, either the first or second pressure regulating valve opens, allowing oil to enter the first pipeline from the main pipeline, providing sufficient oil supply to the damper and forming an oil film of appropriate thickness within the damper. When the oil pressure in the main pipeline continues to increase, excess oil can flow through the second pressure regulating valve, reducing the risk of excess oil accumulating in the first pipeline and causing residual oil buildup in the damper. When the oil pressure in the pipeline is high, the amount of oil flowing through the first pipeline per unit time increases, which can carry away the heat generated within the damper, thereby reducing the oil temperature within the damper, preventing oil coking within the damper, and improving the lubrication efficiency of various components in the engine.

[0050] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0051] The positive and progressive effects of this invention are as follows: The fluid channel includes a main pipeline, a first pipeline, and a second pipeline. A first pressure regulating valve is installed on the first pipeline, and a second pressure regulating valve is installed on the second pipeline. The second pressure regulating valve is a normally open valve. When hydraulic oil flows in the fluid channel, the normally open valve on the second pipeline ensures sufficient oil supply to other mechanical structures except the damper. When the oil pressure increases, either the first or second pressure regulating valve is opened, and oil enters the first pipeline from the main pipeline, providing sufficient oil supply to the damper and forming an oil film of appropriate thickness inside the damper. When the oil pressure in the main pipeline continues to increase, excess oil can flow through the second pressure regulating valve, reducing the risk of excess oil accumulating in the first pipeline and causing residual oil buildup in the damper. When the oil pressure in the pipeline is high, the amount of oil flowing through the first pipeline per unit time increases, which can carry away the heat generated in the damper, thereby reducing the oil temperature in the damper and preventing lubricating oil coking in the damper. When the engine stops, the oil pressure in the main pipeline decreases, the first pressure regulating valve closes, and the main pipeline stops supplying oil to the damper. Oil will not accumulate at the damper, thus preventing the residual heat of the damper from heating the oil and causing coking. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the oil supply system of an embodiment of the present invention.

[0053] Figure 2 This is a schematic diagram of the structure of the oil supply pressure regulating device of the extrusion oil film damper according to an embodiment of the present invention, in state one.

[0054] Figure 3 This is a schematic diagram of the structure of the oil supply pressure regulating device of the extrusion oil film damper in state two according to an embodiment of the present invention.

[0055] Figure 4 This is a schematic diagram of the structure of the oil supply pressure regulating device of the extrusion oil film damper in state three according to an embodiment of the present invention.

[0056] Figure 5 This is a schematic diagram of the structure of the oil supply pressure regulating device of the extrusion oil film damper in state four according to an embodiment of the present invention.

[0057] Explanation of reference numerals in the attached figures

[0058] Pressure regulating device 1

[0059] Fluid channel 11

[0060] 111 Guanzhi Road

[0061] First pipeline 112

[0062] Second pipe 113

[0063] First pressure regulating valve 2

[0064] First valve hole 20

[0065] Inner surface 200

[0066] First valve core 21

[0067] First valve stem 210

[0068] First head 211

[0069] First elastic element 22

[0070] First end cap 23

[0071] First end cap body 230

[0072] First through hole 2301

[0073] First casing 231

[0074] Second sleeve 232

[0075] First step section 2321

[0076] Second pressure regulating valve 3

[0077] Second valve hole 30

[0078] Second valve core 31

[0079] Second valve stem 310

[0080] Second head 311

[0081] Third through hole 312

[0082] Second elastic element 32

[0083] Second end cap 33

[0084] Second end cap body 330

[0085] Second through hole 3301

[0086] Third sleeve 331

[0087] Fourth sleeve 332

[0088] Second step section 3321 Detailed Implementation

[0089] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0090] A pressure regulating device 1, such as Figures 1-5As shown, the pressure regulating device 1 is applied to the damper. In this embodiment, the damper is a squeeze oil film damper. The pressure regulating device 1 includes: a fluid channel 11, a first pressure regulating valve 2, and a second pressure regulating valve 3.

[0091] The fluid channel 11 includes a main pipeline 111, a first pipeline 112, and a second pipeline 113. Both the first pipeline 112 and the second pipeline 113 are connected downstream of the main pipeline 111. Specifically, the first pipeline 112 includes at least a supply branch for the squeeze film damper, and the second pipeline 113 includes a supply branch for the bearings and other components. The squeeze film damper, the bearings, and other components all receive lubricating oil through the main supply pipeline 111 for lubrication, cooling, and cleaning.

[0092] The first pressure regulating valve 2 is installed on the first pipeline 112. The first pressure regulating valve 2 is a normally closed valve. The opening degree of the first pressure regulating valve 2 is positively correlated with the pressure of the main pipeline 111. The first pipeline 112 is used to connect with the damper.

[0093] The second pressure regulating valve 3 is installed on the second pipeline 113;

[0094] The second pressure regulating valve 3 is a normally open valve, and the opening degree of the second pressure regulating valve 3 is positively correlated with the pressure of the main pipeline 111.

[0095] The fluid passage 11 includes a main pipeline 111, a first pipeline 112, and a second pipeline 113. A first pressure regulating valve 2 is installed on the first pipeline 112, and a second pressure regulating valve 3 is installed on the second pipeline 113. The second pressure regulating valve 3 is a normally open valve. When hydraulic oil flows in the fluid passage 11, the normally open valve on the second pipeline 113 ensures sufficient oil supply to other mechanical structures except the damper. When the oil pressure increases, either the first pressure regulating valve 2 or the second pressure regulating valve 3 is opened, and oil flows from the main pipeline 112... Pipe 111 enters the first pipe 112, providing sufficient oil supply to the damper, resulting in an oil film of moderate thickness within the damper. When the oil pressure in the main pipe 111 continues to increase, excess oil can flow through the second pressure regulating valve 3, reducing the risk of excess oil accumulating in the first pipe and causing residual oil buildup in the damper. When the oil pressure in the pipe is high, the amount of oil flowing through the first pipe 112 per unit time increases, which can carry away the heat generated within the damper, thereby lowering the oil temperature within the damper and preventing coking of the lubricating oil within the damper. When the engine stops, the oil pressure in the main pipe decreases, the first pressure regulating valve closes, and the main pipe stops supplying oil to the damper. Oil will not accumulate at the damper, avoiding the residual heat of the damper heating the oil and causing coking.

[0096] In this embodiment, as Figures 1-5As shown, the first pressure regulating valve 2 includes a first valve hole 20, a first valve core 21 and a first elastic member 22. The first valve core 21 is located downstream of the first valve hole 20 and is movable relative to the first valve hole 20. The first elastic member 22 is used to provide the first valve core 21 with the elastic force required to make it abut against the first valve hole 20.

[0097] With the above structure, when the oil pressure in the main pipeline 111 increases, the first valve core 21 is pushed by the oil pressure, and the oil can enter the damper through the first valve hole 20.

[0098] In this embodiment, the second pressure regulating valve 3 includes a second valve hole 30, a second valve core 31, and a second elastic member 32. The second valve core 31 is located downstream of the second valve hole 30 and is movable relative to the second valve hole 30. The second elastic member 32 is used to provide the second valve core 31 with the elastic force required to make it abut against the second valve hole 30.

[0099] With the above structure, when the oil pressure in the main pipeline 111 increases, the second valve core 31 is pushed by the oil pressure, and the oil can enter other lubrication systems except the damper through the second valve hole 30.

[0100] In this embodiment, the first valve core 21 includes a first valve stem 210 and a first head 211. A first elastic member 22 is sleeved on the first valve stem 210, and one end of the first elastic member 22 abuts against the first head 211. The position of the other end of the first elastic member 22 is fixed relative to the first valve hole 20.

[0101] In the initial state, the deformation of the first elastic element 22 resists the oil pressure in the main pipeline 111, the first head 211 abuts against the first valve hole 20, and the first elastic element 22 sleeved on the first valve stem 210 saves the installation space of the first pressure regulating valve 2.

[0102] In this embodiment, as Figures 2-5 As shown, the first pressure regulating valve 2 also includes a first end cap 23, which is located downstream of the first valve hole 20. The first end cap 23 includes a first end cap body 230 and a first sleeve 231 with an opening facing the first valve hole 20. The first sleeve 231 is connected to the first end cap body 230. The body of the first end cap is connected to the inner wall of the first pipeline 112. One end of the first valve core 21 abuts against the first valve hole 20, and the other end of the first valve core 21 is embedded in the interior of the first sleeve 231. One end of the first elastic member 22 abuts against the first valve core 21, and the other end of the first elastic member 22 abuts against the first sleeve 231.

[0103] The first pressure regulating valve 2 includes a first end cap 23, which is disposed inside the first sleeve 231, so that the other end of the first valve core 21 can move inside the first sleeve 231 on the first end cap 23, thereby improving the reliability of the movement of the first valve core 21 under the action of fluid. At the same time, the length of the first elastic member 22 is also easy to set.

[0104] In this embodiment, as Figures 2-5 As shown, the first pressure regulating valve 2 also includes a second sleeve 232, which is disposed inside the first sleeve 231. The first sleeve 231 is threadedly connected to the first end cap 23, and the position of the first sleeve 231 can be adjusted relative to the first valve hole 20. The axial position of the first sleeve 231 relative to the second sleeve 232 is adjustable. The second sleeve 232 is threadedly connected to the first sleeve, and the relative position of the second sleeve 232 and the first sleeve 231 is adjustable. Therefore, the first sleeve 231 and the second sleeve 232 can be adjusted simultaneously or either one can be adjusted individually, which facilitates the adjustment of the opening of the first pressure regulating valve 2 under different hydraulic oil pressures. One end of the first elastic element 22 abuts against the first valve core 21, and the other end of the first elastic element 22 abuts against the second sleeve 232.

[0105] With the above structure, the positions of the first sleeve 231 and the second sleeve 232 can be moved relative to each other, which facilitates the adjustment of the elastic force of the first elastic element 22 corresponding to the first pressure regulating valve 2. The nested structure of the first sleeve 231 and the second sleeve 232 also facilitates the disassembly and installation of the first pressure regulating valve 2.

[0106] In this embodiment, as Figures 2-5 As shown, a first step portion 2321 is provided inside the second sleeve 232.

[0107] The first step portion 2321 inside the second sleeve 232 can prevent the valve stem of the first valve core 21 from detaching from the sleeve, thereby restricting the movement of the first valve stem 210.

[0108] In this embodiment, a first through hole 2301 is also provided on the first end cap body 230, so that the first pipe 112 is connected to the damper.

[0109] In this solution, fluid flowing through the first pressure regulating valve 2 flows into the damper through the first through hole 2301 on the first end cap 23, providing oil to the damper.

[0110] In this embodiment, the second valve core 31 includes a second valve stem 310 and a second head 311. A second elastic member 32 is sleeved on the second valve stem 310, and one end of the second elastic member 32 abuts against the second head 311. The position of the other end of the second elastic member 32 is fixed relative to the second valve hole 30.

[0111] In the initial state, the deformation of the second elastic element 32 resists the oil pressure in the main pipeline 111, the second head 311 abuts against the second valve hole 30, and the second elastic element 32 sleeved on the second valve stem 310 saves the installation space of the second pressure regulating valve 3.

[0112] In this embodiment, as Figures 2-5 As shown, the second pressure regulating valve 3 also includes a second end cap 33, which is located downstream of the second valve hole 30. The second end cap 33 includes a second end cap body 330 and a third sleeve 331 with an opening facing the second valve hole 30. The third sleeve 331 is connected to the second end cap body 330, and the two ends of the third sleeve 331 are always connected. The body of the second end cap is connected to the inner wall of the second pipeline 113. One end of the second valve core 31 abuts against the second valve hole 30, and the other end of the second valve core 31 is embedded in the interior of the third sleeve 331. One end of the second elastic member 32 abuts against the second valve core 31, and the other end of the second elastic member 32 abuts against the third sleeve 331.

[0113] The second pressure regulating valve 3 includes a second end cap 33, which is disposed inside the third sleeve 331, so that the other end of the second valve core 31 can move inside the third sleeve 331 on the second end cap 33, thereby improving the reliability of the movement of the second valve core 31 under the action of fluid. At the same time, the length of the second elastic member 32 is also easy to set.

[0114] In this embodiment, as Figures 2-5 As shown, the second pressure regulating valve 3 also includes a fourth sleeve 332, which is sleeved inside the third sleeve 331. The third sleeve 331 is threadedly connected to the second end cap 33, and the position of the third sleeve 331 can be adjusted relative to the second valve hole 30. The axial position of the fourth sleeve 332 relative to the third sleeve 331 is adjustable. The fourth sleeve 332 is threadedly connected to the third sleeve 331, and the relative position of the fourth sleeve 332 and the third sleeve 331 is adjustable. Therefore, the third sleeve 331 and the fourth sleeve 332 can be adjusted simultaneously or either one can be adjusted individually, which facilitates the adjustment of the opening of the second pressure regulating valve 3 under different hydraulic oil pressures. One end of the second elastic element 32 abuts against the second valve core 31, and the other end of the second elastic element 32 abuts against the fourth sleeve 332.

[0115] With the above structure, the positions of the third sleeve 331 and the fourth sleeve 332 can be moved relative to each other, which facilitates the adjustment of the elastic force of the second elastic element 32 corresponding to the second pressure regulating valve 3. The nested structure of the third sleeve 331 and the fourth sleeve 332 also facilitates the disassembly and installation of the second pressure regulating valve 3.

[0116] In this embodiment, as Figures 2-5 As shown, a second step section is provided inside the fourth sleeve 332.

[0117] The second step portion 3321 inside the fourth sleeve 332 can prevent the valve stem of the second valve core 31 from disengaging from the corresponding sleeve, thereby restricting the movement of the second valve stem 310.

[0118] In this embodiment, a second through hole 3301 is also provided on the second end cap body 330, so that the second pipe 113 is connected to the corresponding system.

[0119] The fluid flowing through the second pressure regulating valve 3 flows into other lubrication systems through the second through hole 3301 on the second end cover 33.

[0120] In this embodiment, the second valve core 31 has a third through hole 312, which connects the second valve hole 30 and the third sleeve 331.

[0121] The third through hole 312 on the second valve core 31 connects the second valve hole 30 and the third sleeve 331. The third through hole 312 keeps the second pressure regulating valve 3 in a normally open state, which facilitates the fluid advance in the main pipeline 111.

[0122] In this embodiment, as Figures 2-5 As shown, when the pressure in the main pipeline 111 exceeds the first preset value, the first pressure regulating valve 2 opens; when the pressure in the main pipeline 111 exceeds the second preset value, the opening of the second pressure regulating valve 3 begins to increase; wherein, the first preset value is less than the second preset value.

[0123] When the pressure in the main pipeline 111 exceeds the first preset value, the first pressure regulating valve 2 opens, and oil is supplied to the damper. When the oil pressure increases, the second pressure regulating valve 3 opens to prevent the hydraulic oil in the damper from coking. The increased oil pressure reduces the fluid flow rate, improves the efficiency of the fluid in carrying away heat from the damper, reduces the temperature in the damper, and further reduces the possibility of coking in the damper.

[0124] In this embodiment, as Figures 2-5As shown, the first pressure regulating valve 2 further includes a first elastic element 22 and a first valve core 21. The first elastic element 22 provides a first elastic force. The pressure of the main pipeline 111 and the first elastic force together drive the first valve core 21 to reciprocate. The first elastic force is used to provide the first valve core 21 with the force required to balance the pressure of the main pipeline 111. The second pressure regulating valve 3 further includes a second elastic element 32 and a second valve core 31. The second elastic element 32 provides a second elastic force. The pressure of the main pipeline 111 and the second elastic force together drive the second valve core 31 to reciprocate. The second elastic force is used to provide the second valve core 31 with the force required to balance the pressure of the main pipeline 111. When the pressure of the main pipeline 111 is greater than a first preset value and less than a second preset value, the first pressure regulating valve 2 opens. When the pressure of the main pipeline 111 is greater than the second preset value, both the first pressure regulating valve 2 and the second pressure regulating valve 3 open.

[0125] Specifically, when the pressure in the main pipeline 111 is greater than the first preset value but less than the second preset value, the first pressure regulating valve 2 opens, and oil begins to enter the damper, which can generate a corresponding oil film to lubricate the engine. When the pressure in the main pipeline 111 is greater than the second preset value, both the first pressure regulating valve 2 and the second pressure regulating valve 3 open, increasing the flow rate of the fluid in the main pipeline 111. This allows more heat to be carried away per unit time, preventing the oil in the damper from overheating and causing coking. At the same time, the increased flow rate can prevent the problem of oil accumulation in the damper.

[0126] In this embodiment, as Figures 2-5 As shown, the first valve orifice 20 has an inner surface 200, the cross-sectional area of ​​which increases along the direction of fluid flow.

[0127] The inner surface 200 of the first valve orifice 20 increases in the direction of fluid flow, which facilitates the flow of fluid through the first pressure regulating valve 2 when the fluid pressure increases, thereby increasing the flow rate of the first pressure regulating valve 2.

[0128] This embodiment also provides an engine, which includes the pressure regulating device 1 as described above.

[0129] The engine includes a pressure regulating device 1. The fluid passage 11 in the pressure regulating device 1 includes a main pipe 111, a first pipe 112, and a second pipe 113. A first pressure regulating valve 2 is installed on the first pipe 112, and a second pressure regulating valve 3 is installed on the second pipe 113. The second pressure regulating valve 3 is a normally open valve. When hydraulic oil flows in the fluid passage 11, the normally open valve on the second pipe 113 ensures sufficient oil supply to other mechanical structures except for the damper. When the oil pressure increases, either the first pressure regulating valve 2 or the second pressure regulating valve 3 is opened, allowing oil to flow from the hydraulic system. The main pipeline 111 enters the first pipeline 112, providing sufficient oil supply to the damper, so that an oil film of appropriate thickness is formed inside the damper. When the oil pressure in the main pipeline 111 continues to increase, excess oil can flow through the second pressure regulating valve 3, reducing the risk of excess oil accumulating in the first pipeline and causing residual oil buildup in the damper. When the oil pressure in the pipeline is high, the amount of oil flowing through the first pipeline 112 per unit time increases, which can carry away the heat generated inside the damper, thereby reducing the oil temperature inside the damper, preventing lubricating oil coking inside the damper, and improving the lubrication efficiency of various components in the engine.

[0130] In practical use Figure 2 This is a schematic diagram of the oil supply pressure regulating device for the extrusion oil film damper described in this patent. To meet the oil supply requirements of the extrusion oil film damper under different conditions, while also taking into account the oil supply requirements of the bearings and other components, the oil supply pressure regulating device is installed in the oil supply pipe of the extrusion oil film damper and the oil supply pipes of the bearings and other components. The oil supply pressure regulating device installed on the oil supply pipe of the extrusion oil film damper consists at least of the first elastic element 22 of the extrusion oil film damper, the positioning nut of the oil supply valve of the extrusion oil film damper, the adjusting screw of the oil supply valve of the extrusion oil film damper, the mounting seat of the oil supply valve of the extrusion oil film damper, the support seat of the oil supply valve of the extrusion oil film damper, the oil supply valve of the extrusion oil film damper, the connecting structure and the sealing structure; the oil supply pressure regulating device installed on the oil supply pipe of the bearing and other components consists at least of the bearing and the second elastic element 32, the positioning nut of the oil supply valve of the bearing and other components, the adjusting screw of the oil supply valve of the bearing and other components, the mounting seat of the oil supply valve of the bearing and other components, the support seat of the oil supply valve of the bearing and other components, the oil supply valve of the bearing and other components, the connecting structure and the sealing structure. The oil supply valve spring, oil supply valve positioning nut, oil supply valve adjusting screw, bearings, and other components of the oil film damper can be adjusted as needed.

[0131] Pressurized lubricating oil from the lubricating oil pump is delivered to various oil supply points via the main pipe 111. As the engine starts and runs, the lubricating oil pump operates, and the pressurized lubricating oil begins to fill the main pipe 111 on the fluid passage 11. A stream of lubricating oil first flows through the bearing and other component oil supply valve guide passage, i.e., the third through hole 312, filling the bearing and other component oil supply pipes and delivering pressurized lubricating oil to the bearings and other components. At this time, the oil supply pressure regulating device is in the following state: Figure 2 As shown, this is called fuel supply state one.

[0132] As the engine speed increases, the power of the lubricating oil pump increases, and the lubricating oil pressure in the main pipeline 111 rises until the pressure inside the pipe is sufficient to compress the first elastic element 22 of the squeeze film damper. This causes the first valve orifice 20 of the squeeze film damper to open, and a stream of pressurized lubricating oil flows sequentially through the oil supply valve flow path of the squeeze film damper and the first through-hole 2301 of the squeeze film damper, filling the squeeze film oil supply pipe and supplying pressurized lubricating oil to the squeeze film damper. At this time, the state of the oil supply pressure regulating device is as follows: Figure 3 As shown, this is called fuel supply state two.

[0133] As the engine speed continues to rise, the lubricating oil pressure in the main pipeline 111 increases sufficiently to compress the bearing and the second elastic element 32, meaning the bearing and the second valve orifice 30 begin to open. A stream of lubricating oil flows sequentially through the bearing and the second valve orifice 30 and the bearing and the second through-hole 3301, further compressing the first elastic element 22 of the oil film damper. The opening of the first valve orifice 20 increases. At this time, the state of the oil flowing through the oil supply pressure regulating device is as follows: Figure 4 As shown, this is called fuel supply state three.

[0134] When the valve is fully open, the second elastic element 32 of the bearing and other components, as well as the first elastic element 22 of the oil film damper, are all fully compressed, and the valve opening reaches its maximum value, thereby preventing excessive lubricating oil pressure and protecting the normal operation of the lubricating oil system. At this time, the state of the oil supply pressure regulating device is as follows: Figure 5 As shown, this is called fuel supply state four.

[0135] As the engine speed decreases to a standstill, the working capacity of the oil pump decreases, and the oil pressure gradually decreases. The oil supply state changes from state four to state one. Therefore, the first valve orifice 20 of the oil film damper gradually closes until the oil supply is cut off to prevent residual oil from accumulating. At this time, the state of the oil supply pressure regulating device is as follows: Figure 2 As shown.

[0136] Through the above-described oil supply process, while satisfying the oil supply needs of bearings and other components, the oil pressure of the squeeze film at low engine speeds is increased, resulting in a good damping and vibration reduction effect, improving the vibration problem of the engine rotor over-criticality; reducing the rotor failure rate caused by vibration, extending engine service life, and reducing engine maintenance costs; reducing the risk of lubricating oil coking on the oil supply line of the hot zone squeeze film damper, extending service life, and reducing engine maintenance costs; simple structure, low weight and cost, easy assembly, and can be adjusted and replaced according to usage conditions. For example, after rotor assembly, there may be eccentricity, causing changes in rotor imbalance characteristics, which ultimately leads to changes in critical speed. This invention can be easily and adaptively adjusted to achieve the best damping and vibration reduction effect.

[0137] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A pressure regulating device, characterized by, The pressure regulating device is applied to the damper, and the pressure regulating device includes: A fluid channel, comprising a main pipeline, a first pipeline, and a second pipeline, wherein both the first pipeline and the second pipeline are connected downstream of the main pipeline; A first pressure regulating valve is installed on a first pipeline. The first pressure regulating valve is a normally closed valve, and its opening degree is positively correlated with the pressure of the main pipeline. The first pipeline is used to connect to the damper. The second pressure regulating valve is installed on the second pipeline; The second pressure regulating valve is a normally open valve, and the opening degree of the second pressure regulating valve is positively correlated with the pressure of the main pipeline.

2. The pressure regulating device of claim 1, wherein, The first pressure regulating valve includes a first valve orifice, a first valve core, and a first elastic element. The first valve core is located downstream of the first valve orifice and is movable relative to the first valve orifice. The first elastic element is used to provide the first valve core with the elastic force required to make it abut against the first valve orifice.

3. The pressure regulating device of claim 1, wherein, The second pressure regulating valve includes a second valve orifice, a second valve core, and a second elastic element. The second valve core is located downstream of the second valve orifice and is movable relative to the second valve orifice. The second elastic element is used to provide the second valve core with the elastic force required to abut against the second valve orifice.

4. The pressure regulating device of claim 2, wherein, The first valve core includes a first valve stem and a first head. The first elastic element is sleeved on the first valve stem, and one end of the first elastic element abuts against the first head. The position of the other end of the first elastic element is fixed relative to the first valve hole.

5. The pressure regulating device of claim 2, wherein, The first pressure regulating valve further includes a first end cap portion, which is disposed downstream of the first valve hole. The first end cap portion includes a first end cap portion body and a first sleeve with an opening facing the first valve hole. The first sleeve is connected to the first end cap portion body, and the first end cap body is connected to the inner wall of the first pipeline. One end of the first valve core abuts against the first valve hole, and the other end of the first valve core is embedded inside the first sleeve. One end of the first elastic member abuts against the first valve core, and the other end of the first elastic member abuts against the first sleeve.

6. The pressure regulating device of claim 5, wherein, The first pressure regulating valve further includes a second sleeve, which is disposed inside the first sleeve. The axial position of the first sleeve relative to the second sleeve is adjustable. One end of the first elastic element abuts against the first valve core, and the other end of the first elastic element abuts against the second sleeve.

7. The pressure regulating device as described in claim 6, characterized in that, The second sleeve has a first step section.

8. The pressure regulating device as described in claim 5, characterized in that, The first end cap body is also provided with a first through hole, which allows the first pipeline to be connected to the damper.

9. The pressure regulating device as described in claim 3, characterized in that, The second valve core includes a second valve stem and a second head. The second elastic element is sleeved on the second valve stem, and one end of the second elastic element abuts against the second head. The position of the other end of the second elastic element is fixed relative to the second valve hole.

10. The pressure regulating device of claim 3, wherein, The second pressure regulating valve further includes a second end cap, which is disposed downstream of the second valve hole. The second end cap includes a second end cap body and a third sleeve with an opening facing the second valve hole. The third sleeve is connected to the second end cap body, and the two ends of the third sleeve are always connected. The body of the second end cap is connected to the inner wall of the second pipeline. One end of the second valve core abuts against the second valve hole, and the other end of the second valve core is embedded inside the third sleeve. One end of the second elastic member abuts against the second valve core, and the other end of the second elastic member abuts against the third sleeve.

11. The pressure regulating device of claim 10, wherein, The second pressure regulating valve further includes a fourth sleeve, which is sleeved inside the third sleeve. The axial position of the fourth sleeve relative to the third sleeve is adjustable. One end of the second elastic element abuts against the second valve core, and the other end of the second elastic element abuts against the fourth sleeve.

12. The pressure regulating device of claim 11, wherein, The fourth sleeve is provided with a second step section.

13. The pressure regulating device of claim 10, wherein, The second end cap body is also provided with a second through hole, which allows the second pipeline to be connected to the corresponding system.

14. The pressure regulating device of claim 10, wherein, The second valve core has a third through hole, which connects the second valve hole and the third sleeve.

15. The pressure regulating device as claimed in claim 1, characterized in that, When the pressure in the main pipeline exceeds a first preset value, the first pressure regulating valve opens; When the pressure in the main pipeline exceeds the second preset value, the opening of the second pressure regulating valve begins to increase; Wherein, the first preset value is less than the second preset value.

16. The pressure regulating device as described in claim 15, characterized in that, The first pressure regulating valve further includes a first elastic element and a first valve core. The first elastic element provides a first elastic force. The pressure of the main pipeline and the first elastic force together drive the first valve core to reciprocate. The first elastic force is used to provide the first valve core with the force required to balance the pressure of the main pipeline. The second pressure regulating valve further includes a second elastic element and a second valve core. The second elastic element provides a second elastic force. The pressure in the main pipeline and the second elastic force together drive the second valve core to reciprocate. The second elastic force is used to provide the second valve core with the force required to balance the pressure in the main pipeline. Specifically, when the pressure in the main pipeline is greater than the first preset value and less than the second preset value, the first pressure regulating valve opens; when the pressure in the main pipeline is greater than the second preset value, both the first pressure regulating valve and the second pressure regulating valve open.

17. The pressure regulating device of claim 2, wherein, The first valve orifice has an inner surface, the cross-sectional area of ​​which increases along the direction of fluid flow.

18. An engine characterized by, The engine includes a pressure regulating device as described in any one of claims 1-17.

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