A structure for increasing the rotating speed of a swash plate pump

Abstract

The application provides a structure for improving the rotating speed of a swash plate pump, and relates to the field of rotating speed of a swash plate pump. The application comprises a wear-resistant mechanism arranged on a driving shaft to widen the rotating speed adaptation range of a swash plate pump body, a filtering mechanism arranged in the swash plate pump body and located at the front end of the driving shaft to filter before oil is sucked by the pump body, and a wiping mechanism arranged on the filtering mechanism and linked with the filtering mechanism to clean the surface of the filtering mechanism. The swash plate pump body can rotate in a wide rotating speed range through a static pressure bearing scheme and a center of mass adjustment scheme. The plunger cavity can assist in oil suction through a low-pressure area on the swash plate and a low-pressure flow channel hole. In the rotating process of the swash plate, the low-pressure flow channel hole and the oil storage space utilize oil resistance and dynamic pressure effect to force the shell oil into the oil storage space, thereby improving the oil supplement pressure, increasing the auxiliary oil suction capacity, and solving the problem of air suction at high rotating speed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of swash plate pump rotating speed, in particular to a structure for improving the rotating speed of swash plate pump. BACKGROUND

[0002] The swash plate type axial piston pump is composed of a swash plate, a piston, a group body, a flow distribution plate and a transmission shaft, and there is an inclination angle gamma between the cylinder body and the swash plate. The pistons are uniformly distributed in the cylinder body, and the heads thereof are tightly pressed on the swash plate through spring return mechanisms and oil pressure. The transmission shaft drives the cylinder body to rotate through the spline, and the swash plate and the flow distribution plate are fixed. When the transmission shaft can rotate in the counterclockwise direction (from left to right), the pistons rotate with the cylinder body and make reciprocating linear motion in the cylinder piston hole.

[0003] The existing swash plate pump is prone to cause pressure reduction in the pump due to too fast oil suction flow rate, resulting in cavitation and cavitation erosion, which damages the performance of the piston pump. Meanwhile, the cylinder piston assembly has large rotational inertia, which causes large centrifugal force at high rotating speed of the piston pump, thereby further deteriorating the stress on the piston and affecting the use effect of the swash plate pump. In addition, the existing swash plate pump lacks a filtering mechanism for oil, so that impurities in the oil cannot be filtered. With the increase of use time, the oil suction piston may be blocked, affecting the use of the entire swash plate pump. SUMMARY

[0004] In order to make up for the above shortcomings, the present application provides a structure for improving the rotating speed of swash plate pump, which aims to improve the problems of limited rotating speed range of the existing swash plate pump, too fast oil suction flow rate, easy damage to the pump body and lack of filtering mechanism for easy blockage.

[0005] The present application is implemented as follows:

[0006] The present application provides a structure for improving the rotating speed of swash plate pump, which comprises a swash plate pump main body, wherein a driving shaft is installed inside the swash plate pump main body.

[0007] A wear-resistant mechanism is arranged on the driving shaft to widen the rotating speed adaptation range of the swash plate pump main body.

[0008] A filtering mechanism is arranged in the swash plate pump main body and located at the front end of the driving shaft to filter the oil before the pump body sucks the oil.

[0009] A wiping mechanism is arranged on the filtering mechanism and linked with the filtering mechanism to clean the surface of the filtering mechanism.

[0010] Preferably, the wear-resistant mechanism comprises a wear-resistant disc fixedly connected to the swash plate pump body, the driving shaft is fixedly connected with a swash plate, the side wall of the swash plate is in sliding contact with the wear-resistant disc, the side wall of the swash plate is provided with a wear-resistant disc side, the swash plate is provided with a static pressure sealing strip, the static pressure sealing strip is provided with a static pressure support cavity, and a plurality of swash plate high-pressure flow channel holes are formed in the static pressure support cavity and penetrate to the back surface of the swash plate.

[0011] Preferably, the back surface of the swash plate is provided with a swash plate high-pressure area, the side of the swash plate away from the swash plate high-pressure area is provided with a swash plate low-pressure area, the swash plate low-pressure area is provided with low-pressure flow communication holes and low-pressure flow communication holes two, the inside of the swash plate is provided with an oil storage space, the side edge of the swash plate is provided with a dynamic balance groove, the swash plate low-pressure area is provided with a shoe support disc side, the shoe support disc is fixedly connected to the inside of the swash plate pump body, the shoe support disc is in sliding contact with the back surface of the swash plate, the shoe support disc is provided with a shoe static pressure sealing strip, a plurality of shoe support disc flow channel holes are equidistantly formed in the shoe support disc, and a shoe assembly is installed on the shoe support disc flow channel holes.

[0012] By adopting the above technical scheme, the rotating speed of the swash plate pump body can be increased, and the oil suction capacity can be increased.

[0013] Preferably, the filter mechanism comprises a filter port fixedly connected to the front end of the swash plate pump body, the inner side wall of the filter port is fixedly connected with a filter screen, the filter screen is in a hollow structure, and the inner side wall of the filter port is slidingly connected with a cleaning plate.

[0014] Preferably, the wiping mechanism comprises a reciprocating threaded rod rotatingly connected to the inner side wall of the filter port, a driving member is threadedly connected to the outer side wall of the reciprocating threaded rod, one side of the driving member is fixedly connected to the outer side wall of the cleaning plate, a rotating impeller is fixedly sleeved to the lower end of the reciprocating threaded rod, and a dirt storage box is formed in the bottom of the filter port.

[0015] By adopting the above technical scheme, the dirt storage box can be provided to uniformly store impurities.

[0016] Preferably, a tension spring is fixedly connected to the outer side wall of the cleaning plate, and a support bottom plate is fixedly connected to the side of the tension spring away from the cleaning plate.

[0017] Preferably, a plurality of soft brush hairs are equidistantly connected to the outer side wall of the support bottom plate, a plurality of impact holes are equidistantly formed in the cleaning plate, and an oil suction port is arranged on the filter port.

[0018] Preferably, the wear-resistant disc, the swash plate, and the shoe support disc can slide relative to each other.

[0019] By adopting the above technical scheme, the soft brush hairs are arranged to clean the filter screen plate.

[0020] The beneficial effects of the present application are:

[0021] 1. By adopting the static pressure supporting scheme and the mass center adjusting scheme, the swash plate pump body can rotate in a wide speed range, the low pressure area on the swash plate, the low pressure flow channel hole can realize auxiliary oil suction of the plunger cavity, and in the process of rotation of the swash plate, the oil liquid in the shell enters the oil storage space by using oil liquid resistance and dynamic pressure effect, so as to improve the oil supplement pressure and increase the auxiliary oil suction capacity, thereby solving the problem of air suction at high speed.

[0022] 2. By adopting the high pressure area on the swash plate, the high pressure flow channel hole, the static pressure supporting cavity and the static pressure supporting sealing belt, the overturning torque balance on the swash plate is realized, and the swash plate and the sliding shoe supporting disc are given a certain supporting force by the oil film, so as to reduce the friction and wear.

[0023] 3. The friction pair between the wear-resistant disc and the swash plate is formed to complete the bearing of the swash plate, and the oil film effect is avoided to avoid excessive wear, so as to avoid the use of the thrust bearing to bear the axial force of the swash plate, thereby eliminating the speed limit of the thrust bearing, and the dynamic balance area is used to adjust the gravity center of the swash plate, so that the swash plate is in a dynamic balance state, and the interference caused by excessive centrifugal force at high speed is avoided.

[0024] 4. By arranging the filter screen plate, the oil liquid can be filtered before the pump body sucks oil, so as to avoid that the impurities in the oil liquid cause the suction piston in the swash plate pump body to be blocked, and the cleaning plate can be driven to move up and down by the reciprocating threaded rod, so as to clean the surface of the filter screen plate, and avoid that the filter screen plate is blocked due to too much filtering impurities. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation to the scope, and other related drawings can also be obtained by those skilled in the art without creative labor.

[0026] Figure 1 is a structural schematic view of a structure for improving the speed of a swash plate pump provided by the embodiments of the present application;

[0027] Figure 2 is a structural schematic view of a sliding shoe supporting disc structure in the structure for improving the speed of a swash plate pump provided by the embodiments of the present application;

[0028] Figure 3Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the back surface structure schematic diagram of sliding shoe support plate;

[0029] Figure 4 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in wear plate structure schematic diagram;

[0030] Figure 5 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the structure schematic diagram of swash plate;

[0031] Figure 6 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the back surface structure schematic diagram of swash plate;

[0032] Figure 7 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the side surface structure schematic diagram of swash plate;

[0033] Figure 8 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the cross-sectional structure schematic diagram of swash plate;

[0034] Figure 9 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the plane structure schematic diagram;

[0035] Figure 10 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the internal structure schematic diagram of filter port;

[0036] Figure 11 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the internal structure schematic diagram of cleaning plate;

[0037] Figure 12 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the external structure schematic diagram of filter port;

[0038] Figure 13 Is the embodiment of the application provides a kind of to improve the structure of swash plate pump rotating speed in the cleaning state schematic diagram of cleaning plate.

[0039] In the figure: 1 drive shaft, 2 wear plate, 3 swash plate, 4 sliding shoe support plate, 5 sliding shoe assembly, 6 filter port, 7 swash plate pump body, 301 swash plate high pressure flow hole, 302 sliding shoe support plate side, 303 swash plate low pressure area, 304 low pressure flow hole, 305 low pressure flow hole two, 306 swash plate high pressure area, 307 oil storage space, 308 wear plate side, 309 static pressure sealing strip, 310 static pressure support cavity, 311 dynamic balance groove, 401 sliding shoe support plate flow hole, 402 sliding shoe static pressure sealing strip, 601 filter screen, 602 dirt storage box, 603 cleaning plate, 604 driving part, 605 rotating impeller, 606 oil suction port, 607 tension spring, 608 support bottom plate, 609 soft brush, 610 impact hole, 611 reciprocating threaded rod. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. EMBODIMENT

[0041] REFERENCE Figures 1-5 A structure for improving the rotating speed of a swash plate pump, comprising a swash plate pump body 7, a drive shaft 1 installed and arranged inside the swash plate pump body 7, and a wear-resistant mechanism arranged on the drive shaft 1 to broaden the rotating speed adaptation range of the swash plate pump body 7. The wear-resistant mechanism comprises a wear plate 2 fixedly connected to the swash plate pump body 7, and a swash plate 3 fixedly connected to the drive shaft 1. The side wall of the swash plate 3 is in sliding contact with the wear plate 2. The side wall of the swash plate 3 is provided with a wear plate side 308. The swash plate 3 is provided with a static pressure sealing strip 309. The static pressure sealing strip 309 is provided with a static pressure support cavity 310. The static pressure support cavity 310 is provided with a plurality of swash plate high pressure flow holes 301 penetrating through the back of the swash plate 3.

[0042] The back surface of the swash plate 3 is provided with a swash plate high pressure area 306, the side of the swash plate 3 away from the swash plate high pressure area 306 is provided with a swash plate low pressure area 303, the swash plate low pressure area 303 is provided with a low pressure flow through hole 304 and a low pressure flow through hole two 305, the inside of the swash plate 3 is provided with an oil storage space 307, the side edge of the swash plate 3 is provided with a dynamic balance groove 311, the swash plate low pressure area 303 is provided with a sliding shoe support plate side 302, the sliding shoe support plate 4 is connected in the swash plate pump body 7, the sliding shoe support plate 4 is in sliding contact with the back surface of the swash plate 3, the sliding shoe support plate 4 is provided with a sliding shoe static pressure sealing strip 402, a plurality of sliding shoe support plate flow channel holes 401 are equidistantly provided on the sliding shoe support plate 4, and the sliding shoe assembly 5 is installed on the sliding shoe support plate flow channel hole 401;

[0043] Referring to 5-13, the filtering mechanism is arranged in the swash plate pump body 7, located at the front end of the driving shaft 1, and filters before the pump body sucks oil, the filtering mechanism comprises a filtering port 6 fixedly connected to the front end of the swash plate pump body 7, the inner side wall of the filtering port 6 is fixedly connected with a filter screen plate 601, the filter screen plate 601 is provided in a hollow manner, the inner side wall of the filtering port 6 is slidably connected with a cleaning plate 603, the outer side wall of the cleaning plate 603 is fixedly connected with a tension spring 607, the side of the tension spring 607 away from the cleaning plate 603 is fixedly connected with a support bottom plate 608, a plurality of soft brush hairs 609 are equidistantly connected to the outer side wall of the support bottom plate 608, a plurality of impact holes 610 are equidistantly provided on the cleaning plate 603, and the filtering port 6 is provided with an oil suction port 606.

[0044] Further, the wiping mechanism is arranged on the filtering mechanism and is linked with the filtering mechanism to clean the surface of the filtering mechanism, the wiping mechanism comprises a reciprocating screw rod 611 rotatably connected to the inner side wall of the filtering port 6, the outer side wall of the reciprocating screw rod 611 is threadedly connected with a driving piece 604, one side of the driving piece 604 is fixedly connected to the outer side wall of the cleaning plate 603, the lower end of the reciprocating screw rod 611 is fixedly sleeved with a rotating impeller 605, and the bottom of the filtering port 6 is provided with a dirt storage box 602.

[0045] It should be noted that during the oil discharging and oil sucking of the sliding shoe assembly 5, the oil basically flows in parallel, and the impact force on the dirt storage box 602 is small, so that the impurities entering the dirt storage box 602 will not be washed out.

[0046] The working principle of the structure for improving the rotating speed of the swash plate pump is as follows:

[0047] In use, the driving shaft 1 is rotated by the external driving device, and the swash plate 3 is rotated, which drives the sliding shoe support plate 4 to swing, and the sliding shoe assembly 5 reciprocates, forming an oil suction and discharge condition. When the oil is suctioned and discharged, the oil passes through the plunger cavity, the plunger flow channel, the sliding shoe flow channel, and the sliding shoe support plate flow channel hole 401 to the low-pressure area 303 or the high-pressure area 306 of the swash plate. Since the 401 on the sliding shoe support plate 4 corresponds to the sliding shoe assembly 5 one by one, and the sliding shoe support plate 4 is close to the surface of the swash plate 3 and is processed with a static pressure sealing band 402, the static pressure support of the surface of the sliding shoe support plate 4 can be realized, an oil film is formed, and the friction between the sliding shoe support plate 4 and the swash plate 3 is no longer dry friction, reducing the friction and wear between the sliding shoe support plate 4 and the swash plate 3;

[0048] When the oil in the high-pressure area 306 of the swash plate communicates to the static pressure support cavity 204 on the side of the swash plate 3 and the wear-resistant plate 2 through the high-pressure flow channel hole 301 of the swash plate, the torque balance of the swash plate 3 can be realized, and the friction and wear between the swash plate 3 and the wear-resistant plate 2 are reduced. The high-pressure area 306 of the swash plate is connected with the high-pressure flow channel hole 301, the dynamic balance groove 311 is connected with the oil storage space 307, and during the rotation of the swash plate 3, the shell oil is forced into the oil storage space 307 under the action of viscous resistance and dynamic pressure effect, so as to increase the pressure of the oil chamber, improve the oil supplement capacity of the low-pressure area 303 of the swash plate, and complete the auxiliary oil suction process through the shell, the low-pressure flow channel hole 304, the sliding shoe support plate flow channel hole 401, the sliding shoe flow channel, and the plunger flow channel during the plunger cavity oil suction stage. In addition, the dynamic balance area is added to the swash plate 3, which can adjust the center of gravity of the swash plate 3, avoid the generation of excessive centrifugal force of the swash plate 3, and adapt to the high-speed requirement of the swash plate pump;

[0049] When the sliding shoe assembly 5 in the swash plate pump body 7 is sucking oil, the filter screen plate 601 in the filter port 6 filters the sucked oil, and as the filtering time increases, in order to avoid too many impurities adhering to the surface of the filter screen plate 601, causing the filter screen plate 601 to be blocked, when the sliding shoe assembly 5 is sucking oil, the oil sucked in will impact the rotating impeller 605 to drive the reciprocating threaded rod 611 to rotate, and as the reciprocating threaded rod 611 rotates, the cleaning plate 603 will be driven by the driving part 604 to move up and down, and the surface of the filter screen plate 601 will be cleaned, and when the filter screen plate 601 is cleaned up and down, the oil will impact the supporting bottom plate 608 through the impact hole 610 to move, so that the soft brush 609 enters the hollow hole of the filter screen plate 601, and the impurities stuck in the hollow hole are cleaned, and when the supporting bottom plate 608 is driven by the cleaning plate 603 to move downward to clean the next row of hollow holes, the soft brush 609 in the hollow hole will be pulled out of the hollow hole at this time, so that the impurities stuck in the hollow hole are taken out, so that the cleaning in the hollow hole is completed. Since the sliding shoe assembly 5 has a process of sucking and discharging oil, when the sliding shoe assembly 5 discharges oil, the pushing force of the oil is not enough to overcome the tension of the tension spring 607, so as to drive the soft brush 609 to move, and at this time the supporting bottom plate 608 drives the soft brush 609 to return to the original position. When the sliding shoe assembly 5 sucks oil again, the above steps are repeated, and the oil impact when sucking oil makes the soft brush 609 inserted into the next row of hollow holes again, and the hollow holes are cleaned, so that the cleaning of the filter screen plate 601 is completed, and the filter screen plate 601 is prevented from being blocked. The impurities cleaned fall into the dirt box 602 for unified storage, and when the swash plate pump body 7 stops working, the dirt box 602 can be opened for unified cleaning. It should be noted that during the process of discharging and sucking oil of the sliding shoe assembly 5, the oil basically flows in parallel, and the impact force on the dirt box 602 is small, so the impurities entering the dirt box 602 will not be washed out.

[0050] It should be noted that the specific model and specification of the motor need to be selected and determined according to the actual specification of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0051] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A structure for increasing the rotational speed of a swashplate pump, characterized in that, Including swash plate pump body (7), the inside of swash plate pump body (7) is provided with drive shaft (1) installation setting; Wear-resistant mechanism, provided on the drive shaft (1), to widen the rotation speed adaptation range of the swash plate pump body (7); Filtering mechanism, provided in the swash plate pump body (7), located at the front end of the drive shaft (1), filters before the pump body sucks oil; The wiping mechanism is arranged on the filtering mechanism and is linked with the filtering mechanism to clean the surface of the filtering mechanism. The wear-resistant mechanism includes a wear-resistant disc (2) fixedly connected to the swash plate pump body (7), the drive shaft (1) is fixedly connected with a swash plate (3), the swash plate (3) is in sliding contact with the wear-resistant disc (2), the swash plate (3) is provided with a wear-resistant disc side (308), the swash plate (3) is provided with a static pressure sealing strip (309), the static pressure sealing strip (309) is provided with a static pressure support cavity (310), a plurality of swash plate high-pressure flow channel holes (301) are formed in the static pressure support cavity (310), and the plurality of swash plate high-pressure flow channel holes (301) penetrate to the back of the swash plate (3). The back of the swash plate (3) is provided with a swash plate high-pressure area (306), one side of the swash plate (3) away from the swash plate high-pressure area (306) is provided with a swash plate low-pressure area (303), the swash plate low-pressure area (303) is provided with a low-pressure flow passage hole (304) and a low-pressure flow passage hole two (305), the inside of the swash plate (3) is provided with an oil storage space (307), the side edge of the swash plate (3) is provided with a dynamic balance groove (311), the inside of the swash plate pump body (7) is connected with a sliding shoe support disc (4), the sliding shoe support disc (4) is in sliding contact with the back of the swash plate (3), the sliding shoe support disc (4) is provided with a sliding shoe static pressure sealing strip (402), a plurality of sliding shoe support disc flow channel holes (401) are equidistantly formed in the sliding shoe support disc (4), and a sliding shoe assembly (5) is mounted on the sliding shoe support disc flow channel holes (401). The swash plate high-pressure area (306) and the swash plate high-pressure flow channel hole (301) are communicated, the dynamic balance groove (311) and the oil storage space (307) are communicated, in the rotation process of the swash plate (3), the shell oil is forced into the oil storage space (307) under the action of viscous resistance and dynamic pressure effect, the oil supply capacity of the swash plate low-pressure area (303) is improved, the auxiliary oil suction process is completed through the shell, the low-pressure flow passage hole (304), the sliding shoe support disc flow channel hole (401), the sliding shoe flow channel and the plunger flow channel in the plunger cavity during the oil suction stage of the plunger cavity, in addition, the dynamic balance area is increased on the swash plate (3), the center of gravity of the swash plate (3) can be adjusted, and excessive centrifugal force of the swash plate (3) is avoided.

2. The structure for increasing the rotation speed of a swash plate pump according to claim 1, wherein The filtering mechanism includes a filter port (6) fixedly connected to the front end of the swash plate pump body (7), an inner side wall of the filter port (6) is fixedly connected with a filter screen plate (601), the filter screen plate (601) is provided in a hollow manner, and an inner side wall of the filter port (6) is slidably connected with a cleaning plate (603).

3. The structure for increasing the rotation speed of a swash plate pump according to claim 2, wherein Said wiping mechanism includes a reciprocating screw rod (611) rotatably connected to the inner side wall of the filter port (6), a driving member (604) is threadedly connected to the outer side wall of the reciprocating screw rod (611), one side of the driving member (604) is fixedly connected to the outer side wall of a cleaning plate (603), a rotating impeller (605) is fixedly sleeved to the lower end of the reciprocating screw rod (611), and a sewage storage box (602) is formed in the bottom of the filter port (6).

4. The structure for increasing the rotation speed of a swash plate pump according to claim 2, wherein A tension spring (607) is fixedly connected to the outer side wall of the cleaning plate (603), and the side of the tension spring (607) away from the cleaning plate (603) is fixedly connected with a supporting bottom plate (608).

5. The structure for increasing the rotation speed of a swash plate pump according to claim 4, wherein A plurality of soft brush hairs (609) are equidistantly connected to the outer side wall of the supporting bottom plate (608), a plurality of impact holes (610) are equidistantly formed in the cleaning plate (603), and an oil suction port (606) is arranged on the filter port (6).

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