Floating plunger type axial mirror image pump for driving inclined cylinder body based on gear transmission

Abstract

The invention discloses a floating plunger type axial mirror image pump based on a gear transmission driving inclined cylinder body, which comprises a pump body, a main shaft is rotatably arranged in the pump body, a turntable is formed in the middle of the main shaft, valve plates are arranged in the pump body outside the two sides of the turntable, and an integrated cylinder body is arranged between each side of the turntable and the valve plate on the corresponding side. One side of the pump body is provided with a turbine cavity and an oil suction cavity, one end of the rotating shaft extends into the turbine cavity and is provided with a turbine, the turbine is provided with a turbine inner cavity which can be communicated with the oil suction cavity and the turbine cavity, and the turbine cavity is communicated with an oil inlet hole of the valve plate through a low-pressure flow channel in the pump body. A high-pressure flow channel is arranged in the pump body and communicated with the oil discharge hole of the valve plate and the outside of the pump body, and the valve plate is provided with a vibration reduction structure formed by symmetrical triangular grooves and vibration reduction holes. The main shaft can drive the integrated cylinder body to synchronously rotate, the problems of oil suction, air suction and cavitation of the pump at a high rotating speed can be solved, and the pump can be well suitable for the motor working condition of the pump.

Description

Technical Field

[0001] The invention relates to the field of axial piston pumps, in particular to a floating piston type axial mirror image pump based on a gear transmission driven tilting cylinder body. Background Art

[0002] In the context of the world's commitment to achieving the "dual carbon goals", fluid power technology has ushered in unprecedented development opportunities and severe challenges, becoming a key force in promoting equipment innovation in the fields of engineering machinery, aerospace and manufacturing. The power source of engineering machinery is gradually changing from internal combustion engines to electric motors. This change has put forward new technical requirements for the swash plate axial piston pump, a core hydraulic component, because electric motors and internal combustion engines have completely different technical characteristics.

[0003] The float cup pump is a new type of plunger pump invented by INNAS of the Netherlands. It has 24 plungers, which significantly reduces the flow pulsation, pressure pulsation, vibration and noise of the pump, but it also has certain limitations. The split cylinder of the float pump is connected and transmits torque to the main shaft through a transmission pin. Since the split cylinder and the cup are arranged obliquely compared to the main shaft, the rotating axis of the split cylinder of the float pump and the rotating axis of the main shaft are not on the same axis, but at an interaxial angle. Therefore, the speed of the split cylinder of the float pump and the speed of the main shaft are not completely equal, resulting in periodic intermittent lateral force and friction in the plunger pair of the float pump. At the same time, there is a certain degree of relative slip movement between the floating cup of the float pump and the split cylinder that clamps the cup, which will also generate friction. That is, the float cup in the split cylinder is affected by the positioning of the cylindrical plate during rotation, and it also needs to be installed in the turntable through the cylindrical surface through the float cup plunger to form a cantilever structure to transmit power. This structure enables the float cup to achieve an elliptical motion trajectory. However, this complex power transmission and positioning mechanism imposes certain restrictions on the performance of the float pump under high speed conditions.

[0004] When the power source of engineering machinery is changed from internal combustion engine to electric motor, the working speed of plunger pump must be further improved from the current 1500-3000r / min to 5000-6000r / min, or even higher, to adapt to the high speed of motor. Because the speed of the split cylinder of the float pump is not completely equal to the speed of the main shaft, the "floating" of the float cup has little effect on the pump at the conventional speed of 1500-3000r / min. Since the connection is through the transmission pin, the structure is simple and the process is friendly, so the current float pump uses the transmission pin to realize the transmission of the main shaft and the split cylinder assembly. However, at a speed of 5000-6000r / min or even higher, the "floating" movement of the float cup will bring more serious effects, such as the instability and vibration of the internal rotating components of the float pump, and the "floating" movement will also bring more serious friction and wear problems. The plunger of the cantilever structure will also be affected by the "floating" movement and be subject to a large lateral force, threatening the strength and safety of the plunger structure.

[0005] In addition, when the pump speed increases, the pump will have oil suction, air suction and cavitation problems at high speed. Also, when the high-pressure oil in the pump discharge port flows back, the pump is equivalent to working in the energy recovery motor condition, the spindle direction is opposite, the spindle is reversed, the suction and discharge ports are interchanged, and the triangular grooves and vibration reduction holes of the distribution plate can no longer play a role in reducing vibration and noise. Summary of the invention

[0006] In view of the problems existing in the floating cup pump in the prior art, the present invention provides a floating plunger type axial mirror image pump based on a gear transmission driven tilting cylinder body.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is: A floating plunger type axial mirror image pump based on a gear transmission driven tilt cylinder body comprises a pump body, a main shaft (1) is rotatably mounted in the pump body, a turntable (21) coaxial with the main shaft (1) is formed in the middle of the main shaft (1), a plurality of ball sockets (19) are respectively provided on each side of the turntable (21), distribution plates (5) are respectively tiltedly mounted on the inner wall of the pump body outside the turntable on both sides, the distribution plates (5) on both sides are mirror images, and the distribution plates (5) on each side are respectively provided with oil inlet arc holes (5.4) and oil discharge waist holes (5.2), the main shaft (1) passes through the central through holes of the distribution plates (5) on both sides, and an integrated cylinder body is respectively provided in the pump body between the turntable on each side and the corresponding side, the integrated cylinder bodies on both sides have the same structure and are mirror images, and the integrated cylinder body on each side is respectively sleeved on the outside of the main shaft (1) through the central through hole; One axial end of the integrated cylinder body on each side is in close contact with the distribution surface of the corresponding side distribution disk (5), and the other axial end of the integrated cylinder body on each side faces the corresponding side disk surface of the rotating disk (21); the integrated cylinder body on each side has a plurality of cylinder holes (7.2), and oil through holes (27) that are connected to the cylinder holes (7.2) and lead to the corresponding side distribution disk (5) in a one-to-one correspondence; a thin rod plunger (8) is installed in each cylinder hole (7.2), the head of each thin rod plunger (8) is a ball head (8.1), and the ball head (8.1) of each thin rod plunger (8) passes through the cylinder hole (7.2) and is installed in a one-to-one correspondence in a ball socket (19) on the corresponding side disk surface of the rotating disk (21); The integrated cylinder body on each side also has a first bevel gear structure (7.1) surrounding the center of the integrated cylinder body, and the disk surface on each side of the rotating disk (21) has a second bevel gear structure (20) surrounding the center of the rotating disk, and part of the bevel teeth in the first bevel gear structure (7.1) of the integrated cylinder body on each side are meshed with part of the bevel teeth in the second bevel gear structure (20) on the disk surface of the corresponding side of the rotating disk (21).

[0008] Furthermore, the integrated cylinder body on each side comprises a cylinder body (7) and a port plate (6), respectively. The cylinder body (7) and the port plate (6) in the integrated cylinder body on each side are coaxially fixedly connected. The cylinder body (7) and the port plate (6) in the integrated cylinder body on each side have central through holes that are interconnected to form a central through hole of the integrated cylinder body for the main shaft (1) to pass through, and the main shaft (1) is located in the central through hole of the cylinder body (7) to form a spherical surface (28) that matches the central through hole of the cylinder body (7), wherein the port plate (6) is in close contact with the distribution surface of the distribution plate (5) on the corresponding side, the cylinder hole (7.2) is provided in the cylinder body (7), and the oil through hole (27) is provided in the port plate (6).

[0009] Furthermore, the cylinder body (7) in the integrated cylinder body on each side has a round seat portion, and the axial edge of the round seat portion facing the corresponding side distribution plate (5) is expanded to form an annular expansion portion, and the port plate (6) is coaxially fixedly connected to the side of the annular expansion portion of the corresponding side cylinder body (7) facing the corresponding side distribution plate (5), the first bevel gear structure (7.1) is arranged on the side of the annular expansion portion of the cylinder body (7) facing the direction of the rotating disk (21), and the second bevel gear structure (20) is arranged at the edge position of the disk surface on each side of the rotating disk (21).

[0010] Furthermore, in the one-piece cylinder body on each side, a cylindrical groove is provided at the edge of the opening of the central through hole of the cylinder body (7) facing the port plate (6), and another cylindrical groove is provided at the edge of the opening of the central through hole of the port plate (6) facing the cylinder body (7). The main shaft (1) is provided with a support ring (13) in a ring sleeve corresponding to the cylindrical groove portion of the cylinder body (7). The support ring (13) is embedded in the cylindrical groove of the cylinder body (7). A wave spring (15) is provided between the support ring (13) and the cylindrical groove of the port plate (6). The wave spring (15) acts on the port plate (6) to press the port plate (6) in the one-piece cylinder body toward the corresponding side distribution plate (5).

[0011] Furthermore, the tail of each thin rod plunger (8) remaining in the cylinder hole (7.2) is a spherical tail (8.2), and the spherical tail (8.2) is provided with an annular groove on its circumferential outer surface, in which a plunger ring (8.3) is installed, and a movable seal is formed between the plunger ring (8.3) and the inner wall of the cylinder hole (7.2) in which it is located.

[0012] Furthermore, the ball head (8.1) of each thin rod plunger (8) is respectively provided with a spiral groove (8.4).

[0013] Furthermore, a pressure plate is tightly fixed to each side of the turntable (21), and the pressure plate is composed of an annular inner pressure plate (14) and an outer pressure plate (9) coaxially sleeved on the circumferential outer edge of the inner pressure plate (14). The inner pressure plate (14) in the pressure plate is coaxially sleeved outside the main shaft (1). The pressure plate has a plurality of spherical through holes (23), and the spherical through holes (23) correspond one-to-one to the ball sockets (19) of the turntable (21). The spherical through holes (23) of the pressure plate are correspondingly sleeved one-to-one on the neck positions of each thin rod plunger (8) on the corresponding side adjacent to the ball head (8.1), and the ball heads (8.1) of each thin rod plunger (8) on the corresponding side are pressed tightly into the corresponding ball sockets (19) on the corresponding side of the turntable (21) through the pressure plate.

[0014] Furthermore, a chamber is provided in the pump body outside the distribution plate on one side, the chamber has a partition plate that divides the chamber into a supercharged turbine chamber (30) and an oil suction chamber (25), and the partition plate has a central through hole; one end of the main shaft (1) passes through the distribution plate on the side and extends into the supercharged turbine chamber (30), and a supercharged turbine (10) is installed on the end of the main shaft (1) located in the supercharged turbine chamber (30); One axial end of the supercharged turbine (10) is mounted in the central through hole of the baffle, the supercharged turbine (10) comprises a supercharged turbine inner cavity (10.1), and the inner wall of the supercharged turbine inner cavity (10.1) is formed with supercharged turbine blades (10.4); one axial end of the supercharged turbine (10) located in the central through hole of the baffle is provided with a supercharged turbine oil suction port (10.2), and the supercharged turbine oil suction port (10.2) is connected to the supercharged turbine inner cavity (10.1); at least one supercharged turbine oil discharge port (10.3) is provided on the radial side surface of the supercharged turbine (10), and the supercharged turbine oil discharge port (10.3) is used to connect the supercharged turbine inner cavity (10.1) and the supercharged turbine cavity (30); The pump body has an oil inlet channel (17), a low-pressure channel, a high-pressure channel, and an oil discharge port (24), wherein the oil inlet channel (17) is connected to the oil suction chamber (25) and an external oil source, the low-pressure channel is connected to the supercharger turbine chamber (30), and an end opening of the oil inlet arc-shaped hole (5.4) of the distribution plate (5) on each side facing away from the integrated cylinder body, the high-pressure channel is connected to the oil discharge port (24), and an end opening of the oil discharge waist-shaped hole (5.2) of the distribution plate (5) on each side facing away from the integrated cylinder body, and the oil discharge port (24) is connected to the high-pressure channel and the outside of the pump body.

[0015] Furthermore, a circular arc-shaped countersunk hole (5.1) is provided on a side of the distribution plate (5) facing the integrated cylinder body at a position corresponding to the oil discharge waist-shaped hole (5.2), the circular arc-shaped countersunk hole (5.1) is connected to the corresponding direction of the oil discharge waist-shaped hole (5.2), and the two ends of the circular arc-shaped countersunk hole (5.1) are respectively connected to triangular grooves (5.5), and the two triangular grooves (5.5) are mirror images. The distribution plate (5) is also provided with vibration reduction holes (5.3) at both ends of the oil inlet circular arc-shaped hole (5.4), and the two vibration reduction holes (5.3) are mirror images.

[0016] The present invention is a floating plunger axial mirror pump based on a gear transmission driving tilting cylinder body. The bevel gear structure on the main shaft transmission plate meshes with the bevel gear structure on the cylinder body to form a gear synchronous transmission mechanism. Through the mutual meshing of the bevel gears, force and torque are transmitted to achieve the main shaft driving the integrated cylinder body to rotate synchronously, eliminating the intermittent periodic lateral force and friction between the plunger pair. At the same time, the split cylinder body and the floating cup are designed as an integrated cylinder body, avoiding the friction generated by the relative sliding movement between the floating cup body of the floating cup pump and the split cylinder body that clamps the cup body.

[0017] The present invention introduces a turbocharger structure and a pump housing and a flow channel with a turbocharger structure by design, thereby increasing the pressure at the oil inlet of the waist-shaped hole of the distribution plate when the plunger pump is working, thereby solving the problems of oil suction, air suction and cavitation generated by the pump at high speed.

[0018] The invention solves the problem that when the high-pressure oil in the oil discharge port of the pump flows back, the main shaft of the pump working under the motor condition reverses, causing the suction and discharge ports to be interchanged, and the triangular grooves and vibration reduction holes of the valve plate no longer play a role in vibration reduction and noise reduction, by designing a valve plate with symmetrical triangular grooves and vibration reduction holes. This enables the pump to work efficiently, reliably and stably under the energy recovery motor condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front cross-sectional view of the overall structure of an embodiment of the present invention.

[0020] Figure 2 It is a top sectional view of the overall structure of an embodiment of the present invention Figure 3 It is a schematic diagram of the internal structure of a pump body according to an embodiment of the present invention.

[0021] Figure 4 It is a cross-sectional view of an integrated cylinder body according to an embodiment of the present invention.

[0022] Figure 5 It is a cross-sectional view of the integrated cylinder body and main shaft transmission according to an embodiment of the present invention.

[0023] Figure 6 It is a cross-sectional view of a turbine according to an embodiment of the present invention.

[0024] Figure 7 It is a schematic diagram of a distribution plate according to an embodiment of the present invention.

[0025] Figure 8 Schematic diagram of a pressure plate according to an embodiment of the present invention.

[0026] Fig. 9 It is a schematic diagram of the main axis of an embodiment of the present invention.

[0027] Fig.10 Schematic diagram of a thin rod plunger according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] like Figure 1-Figure 10As shown, this embodiment discloses a floating plunger type axial mirror image pump based on a gear transmission driven tilt cylinder body, including a pump body with an axial front-to-back horizontal direction, the pump body is formed by connecting a front pump body 4.1 and a rear pump body 4.2, and tapered roller bearings 12 are respectively arranged in the front side wall of the front pump body 4.1 and the rear side wall of the rear pump body 4.2, and a lip seal ring 3 and an elastic retaining ring 2 are also arranged in the front side wall of the front pump body 4.1 in front of the tapered roller bearing. A main shaft 1 with an axial front-to-back horizontal direction is installed in the pump body, and the main shaft 1 is rotatably installed in the tapered roller bearings 12 on the front and rear sides, the front end of the main shaft 1 passes forward from the front side wall of the front pump body 4.1, and the rear end of the main shaft 1 passes backward from the rear side wall of the rear pump body 4.2, and the lip seal ring 3 and the elastic retaining ring 2 in the front side wall of the front pump body 4.1 are sleeved on the main shaft 1 to form a seal.

[0030] A rotating disk 21 coaxial with the main shaft 1 is formed at the middle position of the main shaft 1 in the pump body, and a plurality of ball sockets 19 are respectively arranged on the front and rear side surfaces of the rotating disk 21 . The inner wall of the pump body in front of the turntable 21 (i.e. the side of the front side wall of the front pump body 4.1 facing the pump body) and the inner wall of the pump body behind the turntable 21 (i.e. the side of the rear side wall of the rear pump body 4.2 facing the pump body) are respectively installed with distribution plates 5 tilted, and the distribution plates 5 on the front and rear sides are mirror images. The distribution plates 5 on each side are respectively provided with an oil inlet arc hole 5.4 and a plurality of oil discharge waist-shaped holes 5.2 (this embodiment has 5 oil discharge waist-shaped holes 5.2). The oil inlet arc hole 5.4 and each oil discharge waist-shaped hole 5.2 all pass through the distribution plate 5 where they are located. The distribution plate 5 on each side is provided with an arc-shaped countersunk hole 5.1 at the position of each oil discharge waist-shaped hole 5.2 on the side of the plate facing the turntable 21. The arc-shaped countersunk hole 5.1 is connected with the corresponding direction openings of each oil discharge waist-shaped hole 5.2. The side of the distribution plate 5 on each side facing the turntable 21 is the distribution surface. The distributor plate 5 on each side has a central through hole, and the main shaft 1 passes through the central through hole of the distributor plates 5 on both sides.

[0031] An integrated cylinder body is also provided in the pump body between the front and rear side disks of the rotating disk 21 and the corresponding side distribution disk 5. The integrated cylinder bodies on both sides have the same structure and are mirror images. The integrated cylinder bodies on each side are respectively sleeved on the outside of the main shaft 1 through the central through hole.

[0032] One axial end of the integrated cylinder body on each side is in close contact with the distribution surface of the distribution plate 5 on the corresponding side, and the other axial end of the integrated cylinder body on each side faces the corresponding side plate surface of the turntable 21. Specifically, the integrated cylinder body on each side includes a cylinder body 7 and a port plate 6, respectively. The cylinder body 7 and the port plate 6 in the integrated cylinder body on each side are coaxially fixedly connected by bolts 22. The cylinder body 7 and the port plate 6 in the integrated cylinder body on each side have central through holes that are interconnected to form a central through hole of the integrated cylinder body for the main shaft 1 to pass through, and the main shaft 1 is located in the central through hole of the cylinder body 7 to form a spherical surface 28 that matches the central through hole of the cylinder body 7, wherein the port plate 6 is in close contact with the distribution surface of the distribution plate 5 on the corresponding side, so that the integrated cylinder body on each side is in the same tilted state as the distribution plate 5 on the corresponding side.

[0033] In the integrated cylinder block on each side, a plurality of cylinder holes 7.2 penetrating the cylinder block 7 are provided in the cylinder block 7, and each cylinder hole 7.2 is distributed in an annular manner at equal intervals around the center of the cylinder block 7. A plurality of oil-passing holes 27 penetrating the port plate 6 are provided in the port plate 6, and each oil-passing hole 27 is distributed in an annular manner at equal intervals around the center of the port plate 6. In addition, in the integrated cylinder block on each side, the cylinder holes 7.2 in the cylinder block 7 are connected to the oil-passing holes 27 of the port plate 6 in a one-to-one correspondence, and the cylinder holes 7.2 are connected to the corresponding side distribution plate 5 through the corresponding oil-passing holes 27.

[0034] In the integrated cylinder body on each side, a thin rod plunger 8 is installed in each cylinder hole 7.2 in the cylinder body 7. The head of each thin rod plunger 8 is a ball head 8.1. The ball head 8.1 of each thin rod plunger 8 passes through the cylinder hole 7.2 and is installed in the ball socket 19 of the corresponding side disk surface of the turntable 21 one by one. In addition, the ball head 8.1 of each thin rod plunger 8 is respectively provided with a spiral groove 8.4. The tail of each thin rod plunger 8 left in the cylinder hole 7.2 is a spherical tail 8.2. The circumferential outer surface of the spherical tail 8.2 is provided with an annular groove. A plunger ring 8.3 is installed in the annular groove, and a movable seal is formed with the inner wall of the cylinder hole 7.2 through the plunger ring 8.3. Each thin rod plunger 8 also has a central through hole 8.5.

[0035] The integrated cylinder body on each side also has a first bevel gear structure 7.1 surrounding the center of the integrated cylinder body. Specifically, the cylinder body 7 in the integrated cylinder body on each side has a round seat portion, and the axial edge of the round seat portion facing the corresponding side distribution plate 5 is expanded to form an annular expansion portion, and the port plate 6 is coaxially fixedly connected to the side of the annular expansion portion of the corresponding side cylinder body 7 facing the corresponding side distribution plate 5, and the first bevel gear structure 7.1 is provided on the side of the annular expansion portion of the cylinder body 7 facing the direction of the rotating disk 21.

[0036] Each side of the turntable 21 has a second bevel gear structure 20 surrounding the center of the turntable. Specifically, the second bevel gear structure 20 is arranged at the edge of each side of the turntable 21. Part of the bevel teeth in the first bevel gear structure 7.1 of the annular expansion portion of the cylinder body 7 in each side of the integrated cylinder body meshes with part of the bevel teeth in the second bevel gear structure 20 of the corresponding side of the turntable 21, so that the main shaft 1 cooperates with the second bevel gear structure 20 on the turntable 21 and the first bevel gear structure 7.1 of the annular expansion portion of the cylinder body 7 on the corresponding side to drive the integrated cylinder body on each side to rotate.

[0037] In the integrated cylinder body on each side, a cylindrical groove is provided on the edge of the opening of the central through hole of the cylinder body 7 toward the port disk 6, and another cylindrical groove is provided on the edge of the opening of the central through hole of the port disk 6 toward the cylinder body 7. The main shaft 1 is provided with a support ring 13 in a ring sleeve corresponding to the cylindrical groove portion of the cylinder body 7. The support ring 13 is embedded in the cylindrical groove of the cylinder body 7. A wave spring 15 is provided between the support ring 13 and the cylindrical groove of the port disk 6. The wave spring 15 acts on the port disk 6 to press the port disk 6 in the integrated cylinder body toward the corresponding side distribution disk 5.

[0038] In the present embodiment, a pressure plate is also tightly fixed to each side of the turntable 21, and the pressure plate is composed of an annular inner pressure plate 14 and an outer pressure plate 9 coaxially sleeved on the circumferential outer edge of the inner pressure plate 14. The inner pressure plate 14 in the pressure plate is coaxially sleeved on the outside of the main shaft 1, and the pressure plate has a plurality of spherical through holes 23, and the spherical through holes 23 correspond one-to-one to the ball sockets 19 of the turntable 21, and the spherical through holes 23 of the pressure plate are correspondingly sleeved one-to-one on the neck positions of each thin rod plunger 8 on the corresponding side close to the ball head 8.1, and the ball heads 8.1 of each thin rod plunger 8 on the corresponding side are pressed tightly into the corresponding ball sockets 19 on the corresponding side of the turntable 21 through the pressure plate.

[0039] In this embodiment, a chamber is further provided in the rear side wall of the rear pump body 4.2 located behind the rear valve plate, and an opening is formed at the rear side of the chamber and covered with a rear cover 11. A partition is provided in the chamber of the rear pump body 4.2 to divide the chamber into a supercharger turbine chamber 30 and an oil suction chamber 25, and the partition has a central through hole, wherein the supercharger turbine chamber 30 is in the front and the oil suction chamber 25 is in the rear.

[0040] The rear end of the main shaft 1 passes through the rear side distribution plate and then extends into the turbocharger chamber 30 in the rear side wall of the rear pump body 4.2. The rear end of the main shaft 1 located in the turbocharger chamber 30 is installed with the turbocharger 10 through the spline 26. The axial rear end of the turbocharger 10 is installed in the central through hole of the partition. The turbocharger 10 has a turbocharger inner chamber 10.1. The inner wall of the turbocharger inner chamber 10.1 is formed with turbocharger blades 10.4. The part of the main shaft 1 that penetrates into the turbocharger inner chamber 10.1 is surrounded by an elastic retaining ring 29.

[0041] The axial rear end face of the turbocharger 10 located in the central through hole of the baffle is provided with a turbocharger oil suction port 10.2, which is connected to the turbocharger inner cavity 10.1. The radial side face of the turbocharger 10 is provided with at least one turbocharger oil discharge port 10.3, which is used to connect the turbocharger inner cavity 10.1 and the turbocharger cavity 30.

[0042] The rear pump body 4.2 has an oil inlet channel 17, a rear pump body low-pressure channel 16.2, a rear pump body high-pressure channel 18.1, and an oil discharge port 24, and the front pump body 4.1 has a front pump body low-pressure channel 16.1 and a front pump body high-pressure channel 18.2. Among them: One end of the oil inlet channel 17 is connected to the oil suction chamber 25 in the rear pump body 4.2, and the other end is connected to an external oil source.

[0043] One end of the rear pump body low-pressure flow channel 16.2 is connected to the supercharged turbine chamber 30 in the rear pump body 4.2, and the other end is bifurcated. One of the bifurcated ends of the rear pump body low-pressure flow channel 16.2 is connected to one end of the front pump body low-pressure flow channel 16.1, and the other bifurcated end of the rear pump body low-pressure flow channel 16.2 is connected to the corresponding direction of the oil inlet arc hole 5.4 on the rear side of the rear distribution plate 5 away from the direction of the rotating plate 21. The other end of the front pump body low-pressure flow channel 16.1 is connected to the corresponding direction of the oil inlet arc hole 5.4 on the front side of the front distribution plate 5 away from the direction of the rotating plate 21. The low-pressure flow channel of the pump body is composed of the front pump body low-pressure flow channel 16.1 and the rear pump body low-pressure flow channel 16.2.

[0044] One end of the front pump body high pressure flow channel 18.2 is connected to each oil discharge waist-shaped hole 5.2 on the front side disk surface of the front side distribution plate 5 away from the rotating disk 21, and one end of the rear pump body high pressure flow channel 18.1 is connected to each oil discharge waist-shaped hole 5.2 on the rear side disk surface of the rear side distribution plate 5 away from the rotating disk 21. The other end of the front pump body high pressure flow channel 18.2 and one end of the rear pump body high pressure flow channel 18.1 are connected to each other and then connected to one end of the oil discharge port 24, and the other end of the oil discharge port 24 is connected to the outside of the pump body. The high pressure flow channel of the pump body is composed of the front pump body high pressure flow channel 18.2 and the rear pump body high pressure flow channel 18.1.

[0045] In this embodiment, the two ends of the arc-shaped countersunk hole 5.1 on the side of the distribution plate 5 on each side facing the integrated cylinder body are respectively connected with triangular grooves 5.5, and the two triangular grooves 5.5 are mirror images. The distribution plate 5 is also provided with vibration-damping holes 5.3 at both ends of the oil inlet arc-shaped hole 5.4, and the two vibration-damping holes 5.3 are mirror images, thereby forming a symmetrical vibration-damping structure.

[0046] In this embodiment, a main shaft 1 is rotatably mounted in the pump body, a turntable 21 is designed on the main shaft 1, and structures such as an integrated cylinder body 7 and a distribution plate 5 are respectively arranged on both sides of the turntable 21 to form a symmetrical mirror structure.

[0047] The second bevel gear structure 20 on the turntable 21 on the main shaft 1 meshes with the first bevel gear structure 7.1 on the integrated cylinder body to form a gear synchronous transmission mechanism. Through the mutual meshing of the bevel gears, force and torque are transmitted to achieve the main shaft driving the integrated cylinder body to rotate synchronously.

[0048] A supercharger turbine 10 is installed at one end of the main shaft 1, and the same number of ball sockets 19 are symmetrically provided on the two side surfaces of the main shaft turntable 21. An integrated cylinder body 7 is installed on both sides of the turntable 21. The integrated cylinder body is composed of a port plate 6 and a cylinder body 7 fixed together by bolts 22. A plurality of cylinder holes 7.2 are provided on the side of each integrated cylinder body close to the turntable, and the cylinder holes 7.2 correspond one-to-one to the turntable ball sockets 19. A thin rod plunger 8 is provided in each cylinder hole, and the end plunger ball head 8.1 of the thin rod plunger 8 extends out of the integrated cylinder body and extends into the corresponding turntable ball socket 19. An inner pressure plate 14 and an outer pressure plate 9 are installed at both ends of the turntable 21 by bolts, and the spherical through holes 23 of the inner and outer pressure plates correspond one-to-one to the ball sockets 19 of the turntable, so that the thin rod plunger 8 is fixed in the ball socket 19.

[0049] A distribution plate 5 is provided on the side of the integrated cylinder body away from the rotary disk 21, and the distribution plate 5 is fixed to the inner wall of the pump body at a certain inclination angle; the distribution surface of the distribution plate 5 is closely attached to the bottom surface of the port plate 6. The pump body includes a front pump body 4.1 and a rear pump body 4.2, and tapered roller bearings 12 are provided between the front pump body, the rear pump body and the main shaft; there are 22 thin rod plungers 8, 11 of which are installed on each side of the rotary disk, and are symmetrically installed and arranged on both sides of the rotary disk 21; a plurality of oil through holes 27 connected to the cylinder hole 7.2 are provided on the port plate 6. A waist-shaped hole is provided on the distribution plate 5, and multiple oil through holes 27 are connected to the waist-shaped hole on the distribution plate 5. An oil inlet 17 and an oil outlet 24 are provided on the rear pump body 4.2. The front pump body low-pressure flow channel 16.1 and the rear pump body low-pressure flow channel 16.2 as well as the rear pump body high-pressure flow channel 18.1 and the front pump body high-pressure flow channel 18.2 are respectively connected to the waist-shaped holes of the distribution plate 5 on both sides.

[0050] A turbocharger 10 is installed on the main shaft 1, and a turbocharger chamber 30 is designed on the rear pump body 4.2. The oil enters the pump body from the oil inlet 17. The turbocharger 10 is connected to the main shaft 1 through the spline 26. The high-speed rotation of the main shaft 1 drives the turbocharger 10 to rotate at high speed. The turbocharger supercharges the oil and quickly sucks it into the turbocharger. The oil enters the oil inlet waist hole 5.4 of the distribution plate through the low-pressure oil flow channel of the pump body. When the main shaft 1 rotates at high speed, it drives the integrated cylinder body to rotate. Due to the inclination angle of the integrated cylinder body, the thin rod plunger 8 directly contacts the corresponding cylinder hole 7.2 through the spherical-cylindrical line through the plunger spherical tail 8.2 to form a seal, so that the volume of the sealed working chamber of the corresponding cylinder hole 7.2 of the integrated cylinder body changes continuously. When the volume of the sealed working chamber of the corresponding cylinder hole 7.2 increases continuously, a local vacuum is generated. When the cylinder hole 7.2 that forms a partial vacuum rotates to the position where the oil-passing hole 27 is aligned with the oil-inlet waist-shaped hole 5.4 of the distribution plate 5, the oil discharged from the supercharger 10 is sucked into the cylinder hole that forms a partial vacuum through the oil-inlet waist-shaped hole 5.4 of the distribution plate 5. When the volume of the sealed working cavity formed in the corresponding cylinder hole 7.2 decreases, the oil hydraulic pressure in the cylinder hole of the integrated cylinder body increases to form high-pressure oil. When the integrated cylinder body rotates to the position where the oil-passing hole 27 is aligned with the oil-discharging waist-shaped hole 5.2 of the distribution plate 5, the high-pressure oil is discharged through the oil-discharging waist-shaped hole 5.2 of the distribution plate.

[0051] The main shaft and the turntable are formed in one piece, and a cylindrical groove is provided on the end face of the integrated cylinder body near the port plate 6, and a support ring 13 is installed. The side of the support ring 13 near the turntable is a spherical surface 28 that matches the main shaft, and the side away from the turntable is installed with a wave spring 15. The wave spring 15 acts on the main shaft through the support ring 13 to press the integrated cylinder body toward the distribution plate 5. In the cylinder hole 7.2 of the integrated cylinder body, the side of the port plate 6 facing the distribution plate 5 and the side of the distribution plate 5 facing the port plate 6 are in contact with each other to form an end face match, forming a distribution pair.

[0052] The integrated cylinder body is composed of a port plate 6 and a cylinder body 7. The cylinder body 7 is provided with a cylinder hole 7.2. A corresponding ball socket 19 is provided on the turntable 21. The thin rod plunger 8 having a central through hole 8.5 has a ball head 8.1 at one axial end. The other axial end of each thin rod plunger is a spherical tail 8.2. The ball head 8.1 of the thin rod plunger 8 is limited in the turntable ball socket 19. The plunger ring 8.3 is installed in the groove on the spherical tail 8.2 of the thin rod plunger 8 and is movably sealed with the inner wall of the corresponding cylinder hole 7.2. The ball head part of each thin rod plunger is provided with a spiral groove 8.4 to lubricate the ball head part of the thin rod plunger to prevent the plunger from getting stuck.

[0053] The turbocharger 10 is mounted on the spline 26 at the end of the main shaft 1. The main shaft 1 and the turbocharger 10 are connected by the spline 26 for synchronous rotation. One end of the turbocharger is positioned by the shoulder on the main shaft, and the other end of the turbocharger is positioned by installing an elastic retaining ring 29 on the main shaft. A turbocharger chamber 30 is designed on the rear pump body 4.2. In this chamber, the turbocharger will suck the oil entering the rear pump body into the turbocharger through high-speed rotation. The oil in the turbocharger rotates with the turbocharger blade 10.4. Under the centrifugal force obtained by itself, the oil is thrown toward the turbocharger oil discharge port 10.3 along the blade channel. Therefore, a vacuum is generated in the oil suction chamber 25 near the turbocharger inlet, and the oil in the inlet pipe is sucked in through the inlet flow channel. The continuous rotation of the turbocharger forms continuous oil suction and oil throwing. The oil thrown out of the turbocharger is introduced into the plunger chambers at both ends of the mirror pump through the low-pressure flow channel on the rear pump body 4.2. In the rear pump body 4.2, the oil enters the turbocharger chamber 30 through the oil inlet 17, and then is discharged under the action of the turbocharger. A portion of the discharged oil enters the plunger chamber on one side of the mirror pump through the oil inlet waist hole on the rear pump body 4.2, and another portion of the oil enters the low-pressure flow channel 16.1 of the front pump body 4.1 through the low-pressure oil passage 16.2 on the rear pump body 4.2, and enters the plunger chamber on the other side of the mirror pump through the oil inlet waist hole 5.4 on the front pump body 4.1. The suction chamber 25 of the rear pump body and the turbocharger chamber 30 are separated by a partition to prevent the oil discharged from the turbocharger from returning to the suction chamber.

[0054] In this embodiment, the main shaft 1 is rotated by the prime mover, and the second bevel gear structure 20 on the turntable 21 on the main shaft 1 is meshed with the first bevel gear structure 7.1 on the integrated cylinder body to form a gear synchronous transmission mechanism. Through the mutual meshing of the bevel gears, force and torque are transmitted to achieve the synchronous rotation of the integrated cylinder body driven by the main shaft.

[0055] A turbocharger chamber 30 and an oil suction chamber 25 are added to the rear pump body 4.2. The oil enters the pump body from the oil inlet 17. The turbocharger 10 is connected to the main shaft 1 through the spline 26. The high-speed rotation of the main shaft 1 drives the turbocharger 10 to rotate at a high speed. Through the high-speed rotation of the turbocharger, the low-pressure oil in the oil tank is continuously and rapidly sucked into the turbocharger inner chamber 10.1, and the hydraulic oil after turbocharging is continuously pressed into the oil inlet waist hole 5.4 of the distribution plate through the pump body flow channels 16.1 and 16.2, thereby increasing the pressure at the oil inlet waist hole 5.4 of the distribution plate, solving the problem of oil suction, air suction and cavitation generated by the pump at high speed.

[0056] By designing the distribution plate to be symmetrical, when the high-pressure oil in the oil discharge port of the pump flows back, the pump will work in the motor working condition. At this time, the main shaft will reverse, and the suction and discharge ports will be interchanged. Therefore, the vibration and noise reduction structures of the distribution plate, the triangular grooves 5.5 and the vibration reduction holes 5.3, are designed to be symmetrically arranged. In this way, no matter whether the rotation direction of the main shaft is forward or reverse, the distribution plate can adapt better, and the triangular grooves and the vibration reduction holes can play the role of pre-boosting and pre-reducing vibration and noise reduction.

[0057] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0058] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A floating plunger type axial mirror image pump based on a gear transmission driven tilt cylinder body, comprising a pump body, a main shaft (1) rotatably mounted in the pump body, a turntable (21) coaxial with the main shaft (1) formed in the middle of the main shaft (1), a plurality of ball sockets (19) are respectively provided on each side of the turntable (21), distribution plates (5) are respectively tiltedly mounted on the inner wall of the pump body outside the turntable on both sides of the turntable, the distribution plates (5) on both sides are mirror images, and the distribution plates (5) on each side are respectively provided with an oil inlet arc hole (5.4) and an oil discharge waist hole (5.2), the main shaft (1) passes through the central through holes of the distribution plates (5) on both sides, and is characterized in that: An integrated cylinder body is also provided in the pump body between the disk surface on each side of the rotating disk (21) and the corresponding side distribution disk (5), the integrated cylinder bodies on both sides have the same structure and are mirror images, and the integrated cylinder bodies on each side are respectively sleeved on the outside of the main shaft (1) through a central through hole; One axial end of the integrated cylinder body on each side is in close contact with the distribution surface of the corresponding side distribution disk (5), and the other axial end of the integrated cylinder body on each side faces the corresponding side disk surface of the rotating disk (21); the integrated cylinder body on each side has a plurality of cylinder holes (7.2), and oil through holes (27) that are connected to the cylinder holes (7.2) and lead to the corresponding side distribution disk (5) in a one-to-one correspondence; a thin rod plunger (8) is installed in each cylinder hole (7.2), the head of each thin rod plunger (8) is a ball head (8.1), and the ball head (8.1) of each thin rod plunger (8) passes through the cylinder hole (7.2) and is installed in a one-to-one correspondence in a ball socket (19) on the corresponding side disk surface of the rotating disk (21); The integrated cylinder body on each side also has a first bevel gear structure (7.1) surrounding the center of the integrated cylinder body, and the disk surface on each side of the rotating disk (21) has a second bevel gear structure (20) surrounding the center of the rotating disk, and part of the bevel teeth in the first bevel gear structure (7.1) of the integrated cylinder body on each side are meshed with part of the bevel teeth in the second bevel gear structure (20) on the disk surface of the corresponding side of the rotating disk (21).

2. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 1, characterized in that: The integrated cylinder body on each side comprises a cylinder body (7) and a port plate (6), respectively. The cylinder body (7) and the port plate (6) in the integrated cylinder body on each side are coaxially fixedly connected. The cylinder body (7) and the port plate (6) in the integrated cylinder body on each side have central through holes that are interconnected to form a central through hole of the integrated cylinder body for the main shaft (1) to pass through. The main shaft (1) is located in the central through hole of the cylinder body (7) to form a spherical surface (28) that matches the central through hole of the cylinder body (7), wherein the port plate (6) is in close contact with the distribution surface of the distribution plate (5) on the corresponding side, the cylinder hole (7.2) is arranged in the cylinder body (7), and the oil through hole (27) is arranged in the port plate (6).

3. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 2, characterized in that: The cylinder body (7) in the integrated cylinder body on each side has a round seat portion, and the axial edge of the round seat portion facing the corresponding side distribution plate (5) is expanded to form an annular expansion portion, the port plate (6) is coaxially fixedly connected to the side of the annular expansion portion of the corresponding side cylinder body (7) facing the corresponding side distribution plate (5), the first bevel gear structure (7.1) is arranged on the side of the annular expansion portion of the cylinder body (7) facing the direction of the rotating disk (21), and the second bevel gear structure (20) is arranged at the edge position of the disk surface on each side of the rotating disk (21).

4. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 2, characterized in that: In the one-piece cylinder body on each side, a cylindrical groove is provided at the edge of the opening of the central through hole of the cylinder body (7) facing the port plate (6), and another cylindrical groove is provided at the edge of the opening of the central through hole of the port plate (6) facing the cylinder body (7). The main shaft (1) is provided with a support ring (13) in a ring sleeve corresponding to the cylindrical groove portion of the cylinder body (7). The support ring (13) is embedded in the cylindrical groove of the cylinder body (7). A wave spring (15) is provided between the support ring (13) and the cylindrical groove of the port plate (6). The wave spring (15) acts on the port plate (6) to press the port plate (6) in the one-piece cylinder body toward the corresponding side distribution plate (5).

5. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 1, characterized in that: The tail of each thin rod plunger (8) remaining in the cylinder hole (7.2) is a spherical tail (8.2), and the spherical tail (8.2) is provided with an annular groove on its circumferential outer surface, in which a plunger ring (8.3) is installed, so that a movable seal is formed between the plunger ring (8.3) and the inner wall of the cylinder hole (7.2) in which it is located.

6. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 1, characterized in that: The ball head (8.1) of each thin rod plunger (8) is respectively provided with a spiral groove (8.4).

7. A floating plunger axial mirror pump based on a gear transmission driven tilting cylinder according to claim 1, characterized in that: A pressure plate is fixedly attached to each side of the turntable (21), and the pressure plate is composed of an annular inner pressure plate (14) and an outer pressure plate (9) coaxially sleeved on the circumferential outer edge of the inner pressure plate (14). The inner pressure plate (14) in the pressure plate is coaxially sleeved on the outside of the main shaft (1). The pressure plate has a plurality of spherical through holes (23), and the spherical through holes (23) correspond one-to-one to the ball sockets (19) of the turntable (21). The spherical through holes (23) of the pressure plate are sleeved one-to-one on the neck positions of the thin rod plungers (8) on the corresponding sides adjacent to the ball heads (8.1), and the ball heads (8.1) of the thin rod plungers (8) on the corresponding sides are pressed tightly into the corresponding ball sockets (19) on the corresponding side of the turntable (21) through the pressure plate.

8. A floating plunger axial mirror pump based on a gear transmission driving a tilting cylinder according to any one of claims 1 to 7, characterized in that: The pump body is provided with a chamber outside the distribution plate on one side, the chamber is provided with a partition plate to divide the chamber into a supercharged turbine chamber (30) and an oil suction chamber (25), and the partition plate has a central through hole; one end of the main shaft (1) passes through the distribution plate on the side and extends into the supercharged turbine chamber (30), and a supercharged turbine (10) is installed on the end of the main shaft (1) located in the supercharged turbine chamber (30); One axial end of the supercharged turbine (10) is mounted in the central through hole of the baffle, the supercharged turbine (10) comprises a supercharged turbine inner cavity (10.1), and the inner wall of the supercharged turbine inner cavity (10.1) is formed with supercharged turbine blades (10.4); one axial end of the supercharged turbine (10) located in the central through hole of the baffle is provided with a supercharged turbine oil suction port (10.2), and the supercharged turbine oil suction port (10.2) is connected to the supercharged turbine inner cavity (10.1); at least one supercharged turbine oil discharge port (10.3) is provided on the radial side surface of the supercharged turbine (10), and the supercharged turbine oil discharge port (10.3) is used to connect the supercharged turbine inner cavity (10.1) and the supercharged turbine cavity (30); The pump body has an oil inlet channel (17), a low-pressure channel, a high-pressure channel, and an oil discharge port (24), wherein the oil inlet channel (17) is connected to the oil suction chamber (25) and an external oil source, the low-pressure channel is connected to the supercharger turbine chamber (30), and an end opening of the oil inlet arc-shaped hole (5.4) of the distribution plate (5) on each side facing away from the integrated cylinder body, the high-pressure channel is connected to the oil discharge port (24), and an end opening of the oil discharge waist-shaped hole (5.2) of the distribution plate (5) on each side facing away from the integrated cylinder body, and the oil discharge port (24) is connected to the high-pressure channel and the outside of the pump body.

9. A floating plunger axial mirror pump based on a gear transmission driving tilting cylinder according to any one of claims 1 to 7, characterized in that: A circular arc-shaped countersunk hole (5.1) is provided on a side of the distribution plate (5) facing the integrated cylinder body at a position corresponding to the oil discharge waist-shaped hole (5.2); the circular arc-shaped countersunk hole (5.1) is connected to an opening in a corresponding direction of the oil discharge waist-shaped hole (5.2); two ends of the circular arc-shaped countersunk hole (5.1) are respectively connected to triangular grooves (5.5); the two triangular grooves (5.5) are mirror images; and vibration reduction holes (5.3) are respectively provided outside the two ends of the oil inlet circular arc-shaped hole (5.4) in the distribution plate (5); the two vibration reduction holes (5.3) are mirror images.

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