Adjustable cavitation suppression device in hydraulic system

Abstract

The invention relates to the field of hydraulic systems, and discloses an adjustable cavitation suppression device in a hydraulic system, which comprises an input pipeline and an output pipeline, a first suppression component is arranged at the oil outlet end of the input pipeline, the oil outlet end of the first suppression component is connected with the output pipeline, and the first suppression component comprises a connecting body; a core hole is coaxially formed in the end face of the connecting body, a fixing pipeline is arranged in the core hole, an annular groove and a fixing disc are coaxially arranged on one end face of the connecting body, a connecting hole is coaxially formed in the end face of the fixing disc, a side pipeline is arranged at an opening of the connecting hole, one end of the fixing pipeline is connected with an input pipeline, and the other end of the fixing pipeline is connected with the connecting hole. The tail end of the side pipeline is connected with the output pipeline, a plurality of blade units are arranged in the annular groove in the circumferential direction in an array mode, each blade unit comprises a pin shaft arranged in the annular groove in the radial direction, the pin shafts can rotate around the axes of the pin shafts, and the output ends of the pin shafts extend into the fixed pipeline and are provided with blades.

Description

Technical Field

[0001] The present invention relates to the field of hydraulic systems, in particular to the field of pipeline cavitation suppression in hydraulic systems, and in particular to an adjustable cavitation suppression device in a hydraulic system. Background Art

[0002] Cavitation in hydraulic systems refers to the formation of bubbles (cavities) inside the liquid when the local pressure is lower than the saturated vapor pressure of the liquid. The bubbles then collapse instantly in the high-pressure area, generating shock waves and high temperatures, leading to component damage, noise and performance degradation.

[0003] In the existing technology, dampers are one of the ways to suppress cavitation, including constant dampers and adjustable dampers. Among them: the constant damper provides constant flow resistance through a damping hole with a fixed aperture, establishes a stable pressure gradient, reduces the formation of local low-pressure areas, has no moving parts, and is suitable for steady-state working conditions; the adjustable damper monitors the flow condition through a sensor, automatically adjusts the damping according to the sensor feedback, maintains the optimal pressure, and is suitable for variable flow / variable pressure conditions.

[0004] In addition, when the hydraulic system is actually working (equivalent to a stable working condition), when the internal hydraulic oil flows, the flow conditions in various pipelines cannot remain constant, and there will be some slight fluctuations. At this time, when the existing constant damper is in use, its damping effect will change accordingly with the fluctuation of the hydraulic oil, and the effect of suppressing cavitation may fluctuate, which needs to be improved; when an abnormality occurs in the hydraulic system and causes an abnormal flow of hydraulic oil (equivalent to a variable flow / variable pressure working condition), if a constant damper is used at this time, the cavitation suppression effect may be greatly reduced. If an adjustable damper is used, it is necessary to wait for the sensor to react and feed back the signal to the adjustable damper before the damping can be adjusted accordingly. There is a reaction window period and the reaction is not timely enough, which needs to be improved.

[0005] Based on the above, the present invention proposes an adjustable cavitation suppression device in a hydraulic system. Summary of the Invention

[0006] To solve the problems mentioned in the above background, the present invention provides an adjustable cavitation suppression device in a hydraulic system.

[0007] In order to achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0008] An adjustable cavitation suppression device in a hydraulic system includes a hydraulic oil circuit, the hydraulic oil circuit including an input pipe and an output pipe;

[0009] The oil outlet end of the input pipeline is provided with a first suppression component, and the oil outlet end of the first suppression component is connected to the output pipeline;

[0010] The first suppression member includes a connector, an end surface of the connector is coaxially provided with a core hole, a fixed pipe is coaxially provided in the core hole, an annular groove and a fixed disc are coaxially provided on one end surface of the connector, an end surface of the fixed disc is coaxially provided with a connecting hole, and a side pipe is provided at the opening of the connecting hole;

[0011] One end of the fixed pipe is connected to the input pipe, the other end is connected to the connection hole, and the end of the side pipe is connected to the output pipe;

[0012] A blade unit is arranged in the annular groove and multiple blade units are arranged in an array along the circumferential direction of the annular groove. The blade unit includes a pin shaft arranged radially in the annular groove. The pin shaft can rotate around its own axis. The output end of the pin shaft extends into the fixed pipe and is provided with a blade.

[0013] As a further improvement and optimization of the present invention, a convex seat is provided on the outer circumferential surface of the connector, and a first motor is provided on the convex seat;

[0014] A convex ring is coaxially arranged on the end face of the connector facing the input pipe, and a gear ring and a gear that mesh with each other are arranged on the convex ring. The gear ring is dynamically connected to the first motor, and the output end of the gear shaft of the gear extends into the ring groove and is dynamically connected to the input end of the pin shaft. There are multiple corresponding gears.

[0015] As a further improvement and optimization of the present invention, the side pipe and the output pipe are connected via a second suppression member.

[0016] As a further improvement and optimization of the present invention, the second suppression member includes a connecting pipe and a fixed housing, the open end of the fixed housing is provided with a housing cover, the end surface of the housing cover is provided with two side holes in an array along the circumferential direction, the two side holes are respectively an input hole and an output hole, the input hole is connected to the connecting pipe, the end of the connecting pipe is connected to the side pipe, and the output pipe is connected to the output hole;

[0017] A rotating body is coaxially mounted in the fixed housing. Two oil storage tanks are arranged in an array along the circumferential direction on the side of the rotating body that is in contact with the housing cover. Initially, the two oil storage tanks are coaxial with the two side holes respectively.

[0018] A piston and abutment plate are provided in the oil storage tank, with a damping spring provided between the two, and the butt plate is located on the side of the piston facing the bottom of the oil storage tank;

[0019] The diameter of the oil storage tank is larger than the diameter of the side hole.

[0020] As a further improvement and optimization of the present invention, the abutment plate can move in the oil storage tank, and a pressure gauge is provided on the connecting pipe.

[0021] As a further improvement and optimization of the present invention, a connecting rod is provided on the side of the abutment plate facing away from the piston, a cover is provided on the side of the fixed housing facing away from the housing cover, the end of the connecting rod extends into the cover, and a bracket is provided between the ends of the two connecting rods;

[0022] A screw rod and a third motor which is power-connected to the screw rod are arranged in the housing. The screw rod is threadedly connected to the bracket, and the axis of the screw rod is parallel to the axis of the rotating body.

[0023] As a further improvement and optimization of the present invention, a rotating shaft is coaxially arranged at the end of the rotating body, and the end of the rotating shaft extends out of the fixed housing and is dynamically connected to the second motor.

[0024] As a further improvement and optimization of the present invention, a pressure-stabilizing valve is provided on the connecting pipe, and the pressure-stabilizing valve includes a valve tube provided on the connecting pipe, a valve plug and a stopper are provided in the valve tube, and a pressure-stabilizing spring is provided between the two, and the stopper is located on the side of the valve plug away from the connecting pipe.

[0025] As a further improvement and optimization of the present invention, a threaded hole is provided at the end of the valve tube, a threaded shaft is provided in the threaded hole, and one end of the threaded shaft extends into the valve tube and is connected to the plug.

[0026] As a further improvement and optimization of the present invention, the oil storage tank initially connected to the input hole is named oil storage tank 1, and the oil storage tank connected to the output hole is named oil storage tank 2. The working process of the second suppression component includes the following steps:

[0027] Step 1: Hydraulic oil flows into the first oil reservoir through the input pipe, the connecting pipe, and the input hole. During this process, the hydraulic oil enters the first oil reservoir by pushing the piston backward. Therefore, the damping of the hydraulic oil by the second restraining member increases, which increases the pressure in the connecting pipe. The pressure gauge can monitor the pressure change in the connecting pipe. The pressure plate is retreated based on the data monitored by the pressure gauge. The retreat of the pressure plate compensates for the retreat of the piston, keeping the compression of the damping spring unchanged, thereby keeping the damping applied to the hydraulic oil constant.

[0028] Step 2: After a preset time, the rotating body rotates 180 degrees, so that the oil storage tank 1 and the oil storage tank 2 are interchanged. During this process, the stop plate moves forward to the initial position;

[0029] Step 3: The damping spring in the oil storage tank 1 releases its elastic force, allowing the hydraulic oil to be discharged through the output pipe. At the same time, step 1 is repeated, and the hydraulic oil is stored in the oil storage tank 2.

[0030] In step 1, the piston's backward displacement is less than or equal to (h2-h1) / , where h2 refers to the maximum compression of the damping spring and h1 refers to the initial compression of the damping spring.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. In this solution, when the liquid passes through the first suppression member, the angle between the blade and the flow direction is dynamically adjusted according to the liquid flow rate monitored by the sensor, so that the vortex near the wall and the axial main flow are superimposed, and a high-intensity vortex is not formed, thereby avoiding the induction of dynamic cavitation and achieving the purpose of suppressing cavitation.

[0033] 2. In this solution, a second suppression component is provided on the basis of the first suppression component to further suppress cavitation. The second suppression component can take into account the functions of a constant damper and an adjustable damper to suppress cavitation in the hydraulic oil circuit of the hydraulic system. Specifically:

[0034] The hydraulic oil flows into the first oil reservoir through the connecting pipe and the input hole. It should be noted that the hydraulic oil enters the first oil reservoir by pushing the piston backward. Therefore, the damping of the hydraulic oil by the second restraining member increases, which is reflected in the connecting pipe, causing the pressure in the connecting pipe to increase. The increased pressure is monitored by the pressure gauge. Based on the data monitored by the pressure gauge, the third motor is activated to move the push plate backward, compensating for the retreat of the piston and keeping the damping of the damping spring constant.

[0035] After a preset time, the second motor drives the rotating body to rotate 180 degrees, causing the first oil reservoir and the second oil reservoir to swap positions. During this process, the abutment plates in the two oil reservoirs move synchronously. Therefore, after hydraulic oil is stored in the first oil reservoir, the abutment plate needs to be driven forward to the initial position by the third motor when the two oil reservoirs are swapped. In this way, after the two oil reservoirs have swapped positions, when the second oil reservoir is connected to the input hole, the damping applied to the hydraulic oil in the connecting pipe can be the same as the set value, achieving a constant damping effect. Based on this point, the backward displacement of the piston cannot exceed (h2-h1) / 2;

[0036] In summary, we can see that:

[0037] On the one hand, after the oil reservoir 1 and the oil reservoir 2 are interchanged, the compression amount of the damping spring in the oil reservoir 1 will become greater. Therefore, after being connected to the output hole, the damping spring can release its elastic force more quickly, and the hydraulic oil in the oil reservoir 1 can be discharged through the output pipe more quickly.

[0038] On the one hand, under stable working conditions, the flow of hydraulic oil may also fluctuate slightly. Therefore, after being detected by the pressure gauge, the third motor operates to adjust the position of the abutment plate accordingly, so that the compression of the damping spring always remains unchanged at the set value, that is, the damping always remains unchanged at the set value, so that the cavitation suppression effect is not affected by the fluctuation of the hydraulic oil;

[0039] On the one hand, if the hydraulic system's actuator suddenly malfunctions and causes abnormal hydraulic oil flow, then: first, the flow abnormality is fed back to the piston, which is equivalent to a change in the thrust of the hydraulic oil on the piston. Therefore, the compression amount of the damping spring changes adaptively, reducing the impact of the hydraulic oil flow abnormality caused by the abnormality of the hydraulic system's actuator, leaving reaction time, and then the pressure gauge can monitor the flow abnormality and feed it back to the controller. The controller controls the operation of the third motor to increase or decrease the compression amount of the damping spring, corresponding to the hydraulic oil flow condition after the abnormality, playing the role of adjustable damping, ensuring that the effect of suppressing cavitation is maximized. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of the present invention;

[0041] Figure 2 is an exploded view of the first suppression member;

[0042] Figure 3 is an exploded view of the connector and the first motor;

[0043] Figure 4 Schematic diagram of the connector and blade unit;

[0044] Figure 5 is a schematic structural diagram of a second suppression member;

[0045] Figure 6 is a cross-sectional view of a second suppression member;

[0046] Figure 7 It is a cross-sectional view of the pressure regulating valve and the connecting pipe;

[0047] Figure 8 It is a cross-sectional view of the fixed housing and the rotating body.

[0048] The reference numerals in the accompanying drawings are:

[0049] 100, input pipe; 200, first restraining member; 201, connector; 202, fixed pipe; 203, fixed disc; 204, side pipe; 205, ring groove; 206, pin; 207, blade; 208, first motor; 209, ring gear; 210, gear; 300, second restraining member; 301, fixed housing; 3011, housing cover; 3012, input hole; 3013, output hole; 302, rotating body; 303, rotating body Rotating shaft; 304, second motor; 305, oil storage tank; 306, piston; 307, back plate; 308, damping spring; 309, connecting rod; 310, bracket; 311, screw rod; 312, third motor; 313, connecting pipe; 314, pressure gauge; 315, pressure-stabilizing valve; 3151, valve pipe; 3152, valve plug; 3153, back plug; 3154, pressure-stabilizing spring; 3155, threaded shaft; 316, cover; 400, output pipe. DETAILED DESCRIPTION

[0050] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0051] Reference Figures 1-8 , an adjustable cavitation suppression device in a hydraulic system, comprising a hydraulic oil circuit, the hydraulic oil circuit comprising an input pipe 100 and an output pipe 400, wherein:

[0052] A first suppression member 200 is provided at the oil outlet end of the input pipe 100, and a second suppression member 300 is provided at the oil outlet end of the first suppression member 200. The oil outlet end of the second suppression member 300 is connected to the output pipe 400, and the oil outlet end of the output pipe 400 is connected to the oil tank. In other words, two suppression members are provided between the input pipe 100 and the output pipe 400. Through the cooperation of these two suppression members, cavitation suppression of the hydraulic oil circuit is achieved. It should be noted that the two suppression members can be arranged in series between the input pipe 100 and the output pipe 400 to cooperate and achieve a dual suppression effect, or only one of the suppression members can be arranged between the input pipe 100 and the output pipe 400 to suppress cavitation. That is, the two suppression members can be used in combination or separately.

[0053] Example 1

[0054] Reference Figure 2-Figure 4 The first suppression member 200 includes a cylindrical connector 201 , an end surface of the connector 201 is coaxially provided with a core hole, and a fixed pipe 202 is coaxially provided in the core hole.

[0055] An annular groove 205 is coaxially provided on one end face of the connector 201 and a fixed disc 203 is coaxially fixedly provided on the end face of the connector 201 with the annular groove 205. A connecting hole is coaxially provided through the end face of the fixed disc 203 and a side pipe 204 is provided at the opening of the connecting hole.

[0056] One end of the fixed pipe 202 is connected to the input pipe 100 , the other end of the fixed pipe 202 is connected to the connection hole, and the end of the side pipe 204 is connected to the output pipe 400 or the second suppression member 300 .

[0057] A blade unit is provided in the annular groove 205 and a plurality of blade units are arranged in an array along the circumferential direction of the annular groove 205 . In the attached drawings of this solution, 8 blade units are shown, and the angle between two adjacent blade units is 45 degrees.

[0058] Specifically, the blade unit includes a pin shaft 206 radially arranged in the annular groove 205 . The pin shaft 206 can rotate around its own axis. The output end of the pin shaft 206 extends into the fixed pipe 202 and is provided with a blade 207 .

[0059] The outer circumferential surface of the connecting body 201 is provided with a convex seat, and the first motor 208 is provided on the convex seat.

[0060] A convex ring is coaxially provided on the end face of the connecting body 201 facing the input pipe 100, and a gear ring 209 and a gear 210 that mesh with each other are provided on the convex ring, wherein the gear ring 209 and the first motor 208 are powered by a belt drive, and the output end of the gear shaft of the gear 210 extends into the annular groove 205 and is powered by the input end of the pin shaft 206 through a bevel gear. There are multiple corresponding gears 210; therefore, the pin shaft 206 can be driven to rotate by the first motor 208, and the pin shaft 206 rotates with the blade 207.

[0061] Working principle of embodiment 1:

[0062] The hydraulic oil flows through the input pipe 10, the fixed pipe 202, and the side pipe 204 to the output pipe 400 or the second suppression member 300. During this process, when the hydraulic oil passes through the fixed pipe 202, by changing the angle between the blade 207 and the axis of the fixed pipe 202, that is, changing the angle between the blade 207 and the flow direction of the hydraulic oil, the hydraulic oil can form a circumferential flow on the wall surface, thereby hindering the formation of a low-pressure recirculation zone behind the necking. Specifically: when the flow rate is high, the first motor 208 drives the blade 207 to rotate, so that the angle between the blade 207 and the flow direction increases, destroying the large-scale recirculation zone behind the wall necking, thereby achieving the purpose of suppressing cavitation; when the flow rate is low, the angle between the blade 207 and the flow direction is reduced, thereby reducing the kinetic energy loss of the liquid without generating dynamic cavitation.

[0063] That is, according to the flow velocity, the angle between the blade 207 and the flow direction is dynamically adjusted so that the swirl near the wall is superimposed on the axial mainstream and a high-intensity swirl cannot be formed, thereby avoiding inducing dynamic cavitation and achieving the purpose of suppressing cavitation.

[0064] Example 2

[0065] Reference Figure 5-Figure 8 The second suppression member 300 includes a connection pipe 313 and a fixed housing 301 .

[0066] A shell cover 3011 is provided at the open end of the fixed shell 301. Two side holes are arranged in an array along the circumferential direction on the end face of the shell cover 3011. The two side holes are an input hole 3012 and an output hole 3013 respectively. The input hole 3012 is connected to the connecting pipe 313. The end of the connecting pipe 313 is connected to the side pipe 204 or the input pipe 100, and the output pipe 400 is connected to the output hole 3013.

[0067] A rotating body 302 is coaxially installed in the fixed housing 301, for example, through a bearing. A rotating shaft 303 is coaxially arranged at the end of the rotating body 302. The end of the rotating shaft 303 extends out of the fixed housing 301 and is powered by a second motor 304. The second motor 304 can drive the rotating shaft 303 to rotate, and the rotating shaft 303 rotates with the rotating body 302.

[0068] One end of the rotating body 302 is in contact with the shell cover 3011 to form a seal, and two oil storage grooves 305 are arranged in an array along the circumferential direction on this end surface. Initially, the two oil storage grooves 305 are coaxial with the two side holes respectively.

[0069] A piston 306 and abutment plate 307 are provided in the oil storage tank 305 with a damping spring 308 provided therebetween. The butt plate 307 is located on the side of the piston 306 facing the bottom of the oil storage tank 305. Since the diameter of the oil storage tank 305 is slightly larger than the aperture of the side hole, the piston 306 will not separate from the oil storage tank 305.

[0070] A connecting rod 309 is provided on the side of the support plate 307 facing away from the piston 306, and a cover shell 316 is provided on the side of the fixed shell 301 facing away from the shell cover 3011. The end of the connecting rod 309 extends into the cover shell 316, and a bracket 310 is provided between the ends of the two connecting rods 309. Furthermore, a screw rod 311 and a third motor 312 that forms a power connection with the screw rod 311 are provided in the cover shell 316. The screw rod 311 is threadedly connected to the bracket 310, and the axis of the screw rod 311 is parallel to the axis of the rotating body 302; the screw rod 311 is driven to rotate by the third motor 312, thereby causing the bracket 310 to move, and the bracket 310 moves with the connecting rod 309 and the support plate 307, thereby changing the position of the support plate 307 in the oil storage tank 305.

[0071] A pressure gauge 314 is provided on the connecting pipe 313 .

[0072] Working principle of embodiment 2:

[0073] In this embodiment, the damping spring 308 is a damping medium. Changing the compression of the damping spring 308 can change the magnitude of the damping. Therefore, for ease of description, the initial compression of the damping spring 308 is named h1, the maximum compression of the damping spring 308 is named h2, the oil reservoir 305 initially connected to the input hole 3012 is named oil reservoir 1, and the oil reservoir 305 connected to the output hole 3013 is named oil reservoir 2:

[0074] Hydraulic oil flows into the first oil reservoir through the connecting pipe 313 and the input hole 3012. It should be noted that the hydraulic oil enters the first oil reservoir by pushing the piston 306 backward. Therefore, the damping of the hydraulic oil by the second restraining member 300 increases, which is reflected in the connecting pipe 313, causing the pressure in the connecting pipe 313 to increase. The increased pressure is monitored by the pressure gauge 314. Based on the data monitored by the pressure gauge 314, the third motor 312 is activated, causing the push plate 307 to retreat, thereby compensating for the retreat of the piston 306 and keeping the damping of the damping spring 308 constant.

[0075] After a preset time, the second motor 304 drives the rotating body 302 to rotate 180 degrees, so that the oil storage tank 1 and the oil storage tank 2 are interchanged. It should be noted that:

[0076] The abutment plates 307 in the two oil reservoirs 305 move synchronously. Therefore, after hydraulic oil is stored in the first oil reservoir, the abutment plates 307 need to be driven forward to their initial positions by the third motor 312 when the two oil reservoirs 305 are swapped. This allows the damping applied to the hydraulic oil in the connecting pipe 313 to be the same as the set value when the second oil reservoir is connected to the input hole 3012 after the two oil reservoirs 305 are swapped, achieving a constant damping effect. Based on this, the backward displacement of the piston 306 cannot exceed (h2-h1) / 2.

[0077] After the oil storage tank 1 and the oil storage tank 2 are swapped, the compression amount of the damping spring 308 in the oil storage tank 1 will become larger. Therefore, after being connected with the output hole 3013, the damping spring 308 can release the elastic force more quickly, so that the hydraulic oil in the oil storage tank 1 can be discharged more quickly through the output pipe 400.

[0078] The above process can apply constant damping to the hydraulic oil in the hydraulic system under stable working conditions, thereby suppressing cavitation. It should be noted that under stable working conditions, the flow rate of the hydraulic oil will also fluctuate slightly. Therefore, after being detected by the pressure gauge 314, the third motor 312 operates accordingly to adjust the position of the plate 307, so that the compression amount of the damping spring 308 can always remain unchanged at the set value, that is, the damping always remains unchanged at the set value, so that the effect of suppressing cavitation is not affected by the fluctuation of the hydraulic oil.

[0079] Furthermore, if the hydraulic system's actuator suddenly malfunctions, causing the hydraulic oil flow to become abnormal, then:

[0080] First, the flow abnormality is fed back to the piston 306, which is equivalent to a change in the thrust of the hydraulic oil on the piston 306. Therefore, the compression amount of the damping spring 308 is adaptively changed, reducing the impact of the hydraulic oil flow abnormality caused by the abnormality of the hydraulic system actuator, leaving reaction time, and then the pressure gauge 314 can monitor the flow abnormality and feed it back to the controller. The controller controls the operation of the third motor 312 to increase or decrease the compression amount of the damping spring 308, corresponding to the hydraulic oil flow condition after the abnormality, playing the role of adjustable damping, ensuring that the effect of suppressing cavitation is maximized.

[0081] Example 3

[0082] Based on the second embodiment, the third embodiment is proposed.

[0083] In the second embodiment, during the process of swapping the positions of the two oil storage tanks 305, the input hole 3012 may be blocked, while the hydraulic oil is continuously flowing. The blockage of the input hole 3012 will cause greater fluctuations in the flow of the hydraulic oil, which is not conducive to suppressing cavitation. Therefore, the third embodiment is proposed.

[0084] Reference Figure 6 and Figure 7 A pressure stabilizing valve 315 is provided on the connecting pipe 313.

[0085] The pressure-stabilizing valve 315 includes a valve tube 3151 arranged on the connecting pipe 313, and a valve plug 3152 and a stopper 3153 are arranged in the valve tube 3151, and a pressure-stabilizing spring 3154 is arranged between the two. The stopper 3153 is located on the side of the valve plug 3152 away from the connecting pipe 313; when the two oil storage tanks 305 are interchanged and the input hole 3012 is blocked, the hydraulic oil can be temporarily stored due to the presence of the pressure-stabilizing valve 315. After the interchange is completed, the pressure-stabilizing spring 3154 will release the elastic force to allow the hydraulic oil to flow into the oil storage tank 305.

[0086] Furthermore, a threaded hole is provided at the end of the valve tube 3151, and a threaded shaft 3155 is provided in the threaded hole. One end of the threaded shaft 3155 extends into the valve tube 3151 and is connected to the plug 3153. The initial compression amount of the pressure-stabilizing spring 3154 can be adjusted through the threaded shaft 3155.

[0087] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, make some changes or modifications to equivalent embodiments using the technical contents disclosed above. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An adjustable cavitation suppression device in a hydraulic system, comprising a hydraulic oil circuit, characterized in that: The hydraulic oil circuit includes an input pipeline (100) and an output pipeline (400); The oil outlet end of the input pipeline (100) is provided with a first suppression component (200), and the oil outlet end of the first suppression component (200) is connected to the output pipeline (400); The first suppression member (200) comprises a connector (201), a core hole is coaxially provided on the end face of the connector (201), a fixed pipe (202) is coaxially provided in the core hole, an annular groove (205) and a fixed disc (203) are coaxially provided on one end face of the connector (201), a connecting hole is coaxially provided on the end face of the fixed disc (203), and a side pipe (204) is provided at the opening of the connecting hole; One end of the fixed pipe (202) is connected to the input pipe (100), and the other end is connected to the connection hole, and the end of the side pipe (204) is connected to the output pipe (400); A blade unit is provided in the annular groove (205), and a plurality of blade units are arranged in an array along the circumferential direction of the annular groove (205). The blade unit includes a pin shaft (206) radially provided in the annular groove (205). The pin shaft (206) is capable of rotating around its own axis. The output end of the pin shaft (206) extends into the fixed pipe (202) and is provided with a blade (207).

2. The adjustable cavitation suppression device in a hydraulic system according to claim 1, characterized in that: The outer circumferential surface of the connecting body (201) is provided with a convex seat, and the first motor (208) is provided on the convex seat; A convex ring is coaxially provided on the end face of the connecting body (201) facing the input pipe (100), and a gear ring (209) and a gear (210) that mesh with each other are provided on the convex ring. The gear ring (209) forms a power connection with the first motor (208), and the output end of the gear shaft of the gear (210) extends into the ring groove (205) and forms a power connection with the input end of the pin shaft (206). A plurality of gears (210) are correspondingly provided.

3. The adjustable cavitation suppression device in a hydraulic system according to claim 1, characterized in that: The side pipe (204) and the output pipe (400) are connected via a second restraining member (300).

4. The adjustable cavitation suppression device in a hydraulic system according to claim 3, characterized in that: The second suppression member (300) includes a connecting pipe (313) and a fixed housing (301). The open end of the fixed housing (301) is provided with a housing cover (3011). The end surface of the housing cover (3011) is provided with two side holes arranged in an array along the circumferential direction. The two side holes are an input hole (3012) and an output hole (3013). The input hole (3012) is connected to the connecting pipe (313). The end of the connecting pipe (313) is connected to the side pipe (204). The output pipe (400) is connected to the output hole (3013). A rotating body (302) is coaxially mounted in the fixed housing (301). Two oil storage tanks (305) are arranged in an array along the circumferential direction on the side surface where the rotating body (302) and the housing cover (3011) are in contact. Initially, the two oil storage tanks (305) are coaxial with the two side holes respectively. A piston (306) and a resisting plate (307) are provided in the oil storage tank (305), and a damping spring (308) is provided between the two. The resisting plate (307) is located on the side of the piston (306) facing the bottom of the oil storage tank (305); The diameter of the oil storage tank (305) is larger than the diameter of the side hole.

5. The adjustable cavitation suppression device in a hydraulic system according to claim 4, characterized in that: The abutment plate (307) is capable of moving in the oil storage tank (305), and a pressure gauge (314) is provided on the connecting pipe (313).

6. The adjustable cavitation suppression device in a hydraulic system according to claim 5, characterized in that: A connecting rod (309) is provided on the side of the abutment plate (307) facing away from the piston (306), a cover (316) is provided on the side of the fixed housing (301) facing away from the housing cover (3011), the end of the connecting rod (309) extends into the cover (316), and a bracket (310) is provided between the ends of the two connecting rods (309); A screw rod (311) and a third motor (312) connected to the screw rod (311) are provided in the housing (316). The screw rod (311) is threadedly connected to the bracket (310). The axis of the screw rod (311) is parallel to the axis of the rotating body (302).

7. The adjustable cavitation suppression device in a hydraulic system according to claim 4, characterized in that: A rotating shaft (303) is coaxially arranged at the end of the rotating body (302), and the end of the rotating shaft (303) extends out of the fixed housing (301) and is dynamically connected to a second motor (304).

8. The adjustable cavitation suppression device in a hydraulic system according to claim 5, characterized in that: A pressure stabilizing valve (315) is provided on the connecting pipe (313). The pressure stabilizing valve (315) comprises a valve pipe (3151) provided on the connecting pipe (313). A valve plug (3152) and a stopper (3153) are provided in the valve pipe (3151), and a pressure stabilizing spring (3154) is provided between the valve plug (3152). The stopper (3153) is located on the side of the valve plug (3152) facing away from the connecting pipe (313).

9. The adjustable cavitation suppression device in a hydraulic system according to claim 8, characterized in that: A threaded hole is provided at the end of the valve tube (3151), a threaded shaft (3155) is provided in the threaded hole, and one end of the threaded shaft (3155) extends into the valve tube (3151) and is connected to the stopper (3153).

10. An adjustable cavitation suppression device in a hydraulic system according to claim 6 or 9, characterized in that: The oil storage tank (305) initially connected to the input hole (3012) is named as oil storage tank 1, and the oil storage tank (305) connected to the output hole (3013) is named as oil storage tank 2. The working process of the second suppression member (300) includes the following steps: Step 1: The hydraulic oil flows into the oil storage tank 1 through the input pipe (100), the connecting pipe (313), and the input hole (3012). During this process, the hydraulic oil enters the oil storage tank 1 by pushing the piston (306) backward. Therefore, the damping of the hydraulic oil by the second suppression member (300) increases, which increases the pressure in the connecting pipe (313). The pressure gauge (314) can monitor the pressure change in the connecting pipe (313). The pressure plate (307) is retreated according to the data monitored and fed back by the pressure gauge (314). The retreat of the pressure plate (307) compensates for the retreat of the piston (306), so that the compression of the damping spring (308) remains unchanged, thereby keeping the damping applied to the hydraulic oil constant. Step 2: After a preset time, the rotating body (302) rotates 180 degrees, so that the oil storage tank 1 and the oil storage tank 2 are interchanged. During this process, the abutment plate (307) moves forward to the initial position; Step 3: The damping spring (308) in the oil storage tank 1 releases its elastic force, causing the hydraulic oil to be discharged through the output pipe (400). At the same time, step 1 is repeated, and the hydraulic oil is stored in the oil storage tank 2. In step 1, the backward displacement of the piston (306) is less than or equal to (h2-h1) / 2, where h2 refers to the maximum compression of the damping spring (308) and h1 refers to the initial compression of the damping spring (308).

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