High-speed high-pressure axial connecting rod plunger device driven by gear and gear ring

Abstract

The invention discloses a gear and gear ring transmission high-speed and high-pressure axial connecting rod plunger device, which relates to the technical field of hydraulic transmission and control, and comprises a cylinder body rotatably arranged in a shell accommodating cavity, a transmission shaft in transmission connection with the cylinder body, a gear ring connected with the cylinder body, a crowned tooth return plate obliquely arranged and driven by the gear ring, and a plunger slidably arranged in a cylinder body hole, the sliding shoe friction mechanism is arranged in the containing cavity, the sliding shoe is attached to the wear-resisting lining plate, the sliding shoe is connected with the plunger through a connecting rod, the flow distribution friction mechanism is arranged in the containing cavity, the floating lining plate is connected with the cylinder body through a floating sleeve, and the flow distribution plate is connected with the rear end cover. By adopting gear and gear ring transmission, lateral force borne by a plunger in an axial plunger pump or a motor can be eliminated, and the risk that a plunger ball head portion loses efficacy is avoided. During working, the gear ring and the cylinder body rotate synchronously, and the crowned tooth return plate rotates synchronously under the action of the gear ring, so that the stress states of the sliding shoes and the plungers are greatly improved, the reliability of the structure is improved, and the service life of the structure is prolonged.

Description

Technical Field

[0001] The invention relates to the field of hydraulic transmission and control technology, and in particular to a high-speed and high-pressure axial connecting rod plunger device driven by a gear ring. Background Art

[0002] Water hydraulic transmission technology has been widely used in reverse osmosis desalination, high-rise building fire fighting, marine vessels and other fields due to its high power density, compact structure, no pollution, economic and energy-saving advantages. Water hydraulic pumps and motors are the core power components and actuators in water hydraulic transmission systems. The common form is the axial piston structure, including four key friction mechanisms, namely the flow distribution friction mechanism, the plunger friction mechanism, the sliding shoe friction mechanism and the sliding bearing friction mechanism.

[0003] When an axial piston pump or motor is operating at high speed and high pressure, there is a possibility that the piston friction mechanism and the sliding shoe friction mechanism will fail, which seriously restricts the performance of the component itself and has a particularly serious impact on the hydraulic transmission system.

[0004] In view of this, how to provide a plunger structure that can avoid failure of each friction mechanism and thus improve the reliability of the equipment is a problem that technical personnel in this field need to solve urgently. Summary of the invention

[0005] The purpose of the present invention is to provide a high-speed and high-pressure axial connecting rod plunger device driven by a gear ring to solve the problems existing in the prior art.

[0006] To achieve the above object, the present invention provides a high-speed and high-pressure axial connecting rod plunger device driven by a gear ring, comprising:

[0007] The housing defines a receiving chamber, wherein the front and rear ends of the receiving chamber are respectively a front cover and a rear cover;

[0008] A cylinder body, rotatably disposed in the accommodating cavity;

[0009] A transmission shaft, passing through the front end cover and being transmission-connected to the cylinder body;

[0010] A gear ring connected to the cylinder body and perpendicular to the axis of the transmission shaft;

[0011] The drum-shaped gear return plate is arranged obliquely relative to the axis of the transmission shaft and is drivingly connected to the gear ring; the gear ring is used to drive the drum-shaped gear return plate to rotate, and the drum-shaped gear return plate can slide against the inner teeth of the gear ring during the rotation process;

[0012] A plunger friction mechanism is slidably disposed in the cylinder body along the axial direction of the transmission shaft;

[0013] A sliding shoe friction mechanism, disposed in the accommodating cavity and connected to the front end cover, the sliding shoe friction mechanism being connected to the plunger friction mechanism;

[0014] The flow distribution friction mechanism is arranged in the accommodating cavity and connected to the rear end cover, and the flow distribution friction mechanism is connected to the cylinder body.

[0015] Furthermore, a mounting hole is opened in the middle of the drum-shaped gear return plate, the inner side surface of the mounting hole is an arc surface, a ball joint is arranged in the mounting hole, the drum-shaped gear return plate cooperates with the spherical surface of the ball joint and is connected to the transmission shaft through the ball joint.

[0016] Furthermore, the tooth profile of the gear ring is an involute tooth profile, and the tooth profile of the drum-shaped gear return plate is an arc tooth profile.

[0017] Furthermore, the plunger friction mechanism comprises:

[0018] A plunger sleeve, embedded in the cylinder body;

[0019] A plunger is slidably disposed in the inner hole of the plunger sleeve;

[0020] A plunger ball-and-socket assembly, wherein a mounting seat is provided on the side of the plunger close to the sliding shoe friction mechanism, and the plunger ball-and-socket assembly is sealed and arranged in the mounting seat; a plunger damping adjustment screw plug is provided on the side of the plunger away from the sliding shoe friction mechanism;

[0021] A connecting rod has one end connected to the plunger ball-and-socket assembly and the other end connected to the sliding shoe friction mechanism.

[0022] Furthermore, the sliding shoe friction mechanism includes:

[0023] A swash plate, disposed in the accommodating cavity and connected to the front end cover, with a side of the swash plate close to the connecting rod being an inclined surface;

[0024] A wear-resistant lining plate is arranged on the inclined surface;

[0025] A sliding shoe is provided on the drum-shaped tooth return plate and is in contact with the surface of the wear-resistant lining plate;

[0026] A sliding shoe ball and socket assembly, wherein the sliding shoe is connected to the other end of the connecting rod through the sliding shoe ball and socket assembly;

[0027] When the gear ring drives the drum-shaped gear return plate to rotate, the sliding shoe rotates by friction on the surface of the wear-resistant lining; when the sliding shoe rotates to the end with a lower slope, the plunger and the drum-shaped gear return plate slide away from the front end cover, and when the sliding shoe rotates to the end with a higher slope, the plunger and the drum-shaped gear return plate slide toward the front end cover.

[0028] Furthermore, the flow distribution friction mechanism includes:

[0029] A distribution plate, disposed in the accommodating cavity and connected to the rear end cover;

[0030] The floating liner is connected to the cylinder body through a floating sleeve. The floating liner is connected to the distribution plate. The cylinder body can drive the floating liner to rotate through the floating sleeve.

[0031] Furthermore, it also includes:

[0032] A spring seat connected to the floating liner and extending into the cylinder body;

[0033] A center spring is arranged on the spring seat and connected to the transmission shaft. The center spring has an elastic tendency toward the front end cover. The center spring can make the sliding shoe and the wear-resistant lining plate tightly connected.

[0034] Further, the plunger ball and socket assembly comprises:

[0035] The plunger ball socket lower sleeve is arranged in the mounting seat through the ball socket lower sleeve O-type sealing ring;

[0036] The plunger ball socket upper sleeve is arranged on the side of the plunger ball socket lower sleeve close to the connecting rod;

[0037] The ball socket upper sleeve pressure cover is arranged on the side of the plunger ball socket upper sleeve close to the sliding shoe through the ball socket upper sleeve O-ring, the plunger ball socket lower sleeve, the plunger ball socket upper sleeve and the ball socket upper sleeve pressure cover define a first connecting cavity, and one end of the connecting rod is adapted to the shape of the first connecting cavity and is arranged in the first connecting cavity.

[0038] Furthermore, the slipper ball socket assembly includes: a slipper ball socket pressure cover and a slipper pressure cover which are sequentially arranged on the side of the slipper close to the connecting rod, the slipper, the slipper ball socket pressure cover and the slipper pressure cover define a second connecting cavity, and the other end of the connecting rod is adapted to the shape of the second connecting cavity and is arranged in the second connecting cavity.

[0039] The present invention discloses the following technical effects:

[0040] 1. The gear ring transmission structure can avoid the risk of failure of the plunger ball head in the axial piston pump or motor compared with the existing technology. During operation, the gear ring rotates synchronously with the cylinder body, and the drum-shaped gear return plate also rotates synchronously under the action of the gear ring, eliminating the lateral force of the return plate on the plunger in the traditional structure, greatly improving the stress state of the sliding shoe and the plunger, and improving the reliability and stability of the structure.

[0041] 2. A connecting rod is used to connect the plunger and the sliding shoe. A plunger ball-and-socket assembly matching the shape of one end of the connecting rod is provided in the plunger cavity, and a sliding shoe ball-and-socket assembly matching the shape of the other end of the connecting rod is provided in the sliding shoe. Compared with the prior art, the connection stability between the plunger and the connecting rod is improved, the lateral force on the plunger is eliminated, and the reliability and service life of the device are improved; at the same time, the connection stability between the sliding shoe and the connecting rod is also improved, and the phenomenon of sliding shoe overturning and burning caused by eccentric wear can be avoided under the complex force environment of the sliding shoe. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0043] Figure 1 It is a left view of the structure of the present invention;

[0044] Figure 2 for Figure 1 AA cross-section diagram of ;

[0045] Figure 3 is a schematic diagram of a transmission shaft cross section;

[0046] Figure 4 is a schematic diagram of the gear ring structure;

[0047] Figure 5 This is a schematic diagram of the structure of a drum-shaped gear return plate;

[0048] Figure 6 It is a schematic diagram of the plunger-connecting rod-slipper structure;

[0049] Figure 7 It is a schematic diagram of the wear-resistant lining structure;

[0050] Figure 8 It is a schematic diagram of the floating liner structure;

[0051] Fig. 9 It is the front view of the distribution plate and its cross-sectional structure schematic diagram;

[0052] Fig.10 This is the rear view of the valve plate;

[0053] In the figure, 1, transmission shaft; 2, main shaft transmission key; 3, sealing gland; 4, mechanical seal assembly; 5, gland hexagon screw; 6, front end cover; 7, inclined plate; 8, front end cover O-ring; 9, wear-resistant lining; 10, sliding shoe; 11, sliding shoe ball socket gland; 12, sliding shoe gland; 13, connecting rod; 14, ball socket upper sleeve gland; 15, ball socket upper sleeve O-ring; 16, plunger ball socket upper sleeve; 17, plunger ball socket lower sleeve; 18, ball socket lower sleeve O-ring; 19, plunger; 20, plunger sleeve; 21, cylinder block; 22, sliding bearing; 23, housing; 24, plunger damping adjustment 1. Joint screw plug; 25. Floating sleeve; 26. Floating sleeve O-ring; 27. Washer; 28. Floating liner; 29. ​​Distribution plate; 30. Distribution plate O-ring; 31. Rear end cover O-ring; 32. Rear end cover; 33. Rear end cover fastening screw; 34. Distribution plate 29 fastening screw; 35. Spring seat; 36. Center spring; 37. Flat key; 38. Plunger sleeve pressure plate; 39. Pressure plate hexagon socket screw; 40. Ball joint; 41. Drum gear return plate; 42. Gear ring; 43. Cylindrical pin; 44. Front end cover fastening screw; 45. Slipper pressure cover O-ring; 46. Arc surface. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] When the axial piston pump or motor is in a high-speed, high-pressure operating condition, the existing flow distribution friction mechanism, plunger friction mechanism and slipper friction mechanism may fail.

[0057] Specifically, the plunger friction mechanism includes a plunger and its corresponding cylinder hole, and its main motion forms are the reciprocating linear motion of the plunger relative to the cylinder hole and the spin motion of the plunger. This leads to complex force conditions between the plunger friction mechanism and more stringent requirements on its fitting clearance. More seriously, it can cause severe wear on the plunger surface and rupture of the plunger ball head, as well as scratches and cracks on the cylinder hole surface.

[0058] The sliding shoe friction mechanism includes sliding shoes and swash plates. Its main movement form is the sliding of the sliding shoes relative to the swash plate surface. Due to the special structure, the sliding shoe's movement track on the swash plate surface is an ellipse. On the one hand, the sliding shoe is subject to the hydraulic pressure at the plunger end, the force of the return plate, its own inertia force, flow resistance, etc. On the other hand, it is also subject to the reverse support force of the swash plate and the friction force generated by relative movement, etc. This makes the sliding shoe more complicated, causing the sliding shoe to overturn relative to the swash plate. In more serious cases, the sliding shoe will burn due to eccentric wear.

[0059] The embodiment of the present invention provides a high-speed and high-pressure axial connecting rod plunger device with a gear ring transmission. The housing 23 defines an accommodating chamber, and the front and rear ends of the accommodating chamber are respectively a front cover 6 and a rear cover 32. The front cover 6 is sealed and connected to the housing 23 through a front cover fastening screw 44, and a front cover O-ring 8 is provided at the connection. The mechanical seal assembly 4 is installed on the transmission shaft 1 and the front cover 6 through a sealing gland 3 and a gland hexagon socket screw 5 to prevent leakage in the device. The rear cover 32 is sealed and connected to the housing 23 through a rear cover fastening screw 33, and a rear cover O-ring 31 is provided at the connection. A sliding bearing 22 is installed in the accommodating chamber in an interference fit, and the cylinder body 21 is rotatably arranged in the accommodating chamber through the sliding bearing 22, and a circumferential groove is provided on the surface of the sliding bearing 22 for bearing lubrication. One end of the transmission shaft 1 passes through the front cover 6 and is connected to the cylinder body 21 through the flat key 37. The transmission shaft 1 and the flat key 37 are interference fit. The other end of the transmission shaft 1 can be connected to the driving motor for the plunger 19 pump through the main shaft transmission key 2, or connected to the power unit for the plunger 19 motor, and the power is input from the transmission shaft 1 to the power unit by water pressure. The ring gear 42 is interference connected to the cylinder body 21 and is perpendicular to the axis of the transmission shaft 1. The drum gear return plate 41 is tilted relative to the axis of the transmission shaft 1 and is connected to the ring gear 42. The ring gear 42 is used to drive the drum gear return plate 41 to rotate, and the drum gear return plate 41 can slide against the inner teeth of the ring gear 42 during the rotation. The plunger friction mechanism is slidably arranged in the cylinder body 21 along the axial direction of the transmission shaft 1, the slipper friction mechanism is arranged in the accommodating cavity and connected to the front cover 6, the slipper friction mechanism is connected to the plunger friction mechanism, the distribution friction mechanism is arranged in the accommodating cavity and connected to the rear cover 32, and the distribution friction mechanism is connected to the cylinder body 21.

[0060] In this embodiment, a mounting hole is opened in the middle of the drum-shaped gear return plate 41, and the inner side surface of the mounting hole is injection-molded with an arc surface 46 of carbon fiber reinforced polyetheretherketone material. A ball joint 40 is arranged in the mounting hole. The drum-shaped gear return plate 41 is spherically matched with the ball joint 40 and is connected to the transmission shaft 1 through the ball joint 40. The cross-section of the arc surface 46 on the side close to the sliding shoe friction mechanism is smaller, and the cross-section on the side away from the sliding shoe friction mechanism is larger.

[0061] In this embodiment, the tooth profile of the gear ring 42 is an involute tooth profile, and the tooth profile of the drum gear return disk 41 is an arc tooth profile, and the two are connected in transmission. The thickness of the gear ring 42 is much greater than the thickness of the drum gear return disk 41, and the drum gear return disk 41 is driven to rotate by the gear ring 42. Since the drum gear return disk 41 is tilted, the drum gear return disk 41 reciprocates in the front and rear directions during rotation and always maintains a transmission connection relationship with the gear ring 42 (sliding on the inner teeth of the gear ring 42). In addition, it should be noted that the front and rear reciprocating motion of the above-mentioned drum gear return disk 41 is based on the motion process of any point on the drum gear return disk 41 as a reference.

[0062] In this embodiment, the plunger friction mechanism includes: a plunger sleeve 20, which is interference-fitted in the cylinder body 21 and fixed to the cylinder body 21 by a plunger sleeve pressure plate 38 and a pressure plate hexagonal screw 39; a plunger 19 is slidably arranged in the inner hole of the plunger sleeve 20; a mounting seat is arranged on the side of the plunger 19 of the plunger ball and socket assembly close to the sliding shoe friction mechanism, and the plunger ball and socket assembly is sealed in the mounting seat; a plunger damping adjustment screw 24 is arranged on the side of the plunger 19 away from the sliding shoe friction mechanism; one end of the connecting rod 13 is connected to the plunger ball and socket assembly, and the other end is connected to the sliding shoe friction mechanism.

[0063] In this embodiment, the sliding shoe friction mechanism includes: a swash plate 7, which is arranged in the accommodating cavity and connected to the front end cover 6 through a cylindrical pin 43, and its side close to the connecting rod 13 is an inclined surface; the wear-resistant lining plate 9 is pressed against the inclined surface with interference fit, and the wear-resistant lining plate 9 improves the friction performance of the sliding shoe friction mechanism through a surface treatment process; the sliding shoe 10 is arranged on the drum-shaped gear return plate 41 and fits the surface of the wear-resistant lining plate 9; the sliding shoe ball and socket assembly sliding shoe 10 is connected to the other end of the connecting rod 13 through the sliding shoe ball and socket assembly; when the ring gear 42 drives the drum-shaped gear return plate 41 to rotate, the sliding shoe 10 rotates by friction on the surface of the wear-resistant lining plate 9; when the sliding shoe 10 rotates to the end with a lower inclined surface, the plunger 19 and the drum-shaped gear return plate 41 slide in the direction away from the front end cover 6, and when the sliding shoe 10 rotates to the end with a higher inclined surface, the plunger 19 and the drum-shaped gear return plate 41 slide in the direction close to the front end cover 6.

[0064] In this embodiment, both ends of the connecting rod 13 are set to be spherical. The plunger ball socket assembly includes: a plunger ball socket lower sleeve 17, which is arranged in the mounting seat through the ball socket lower sleeve O-ring 18; a plunger ball socket upper sleeve 16 is arranged on the side of the plunger ball socket lower sleeve 17 close to the connecting rod 13; a ball socket upper sleeve pressure cover 14 is arranged on the side of the plunger ball socket upper sleeve 16 close to the sliding shoe 10 through the ball socket upper sleeve O-ring 15, and the plunger ball socket lower sleeve 17, the plunger ball socket upper sleeve 16 and the ball socket upper sleeve pressure cover 14 define a first connecting cavity, and one end of the connecting rod 13 is adapted to the shape of the first connecting cavity and is arranged in the first connecting cavity. The slipper ball socket assembly includes: a slipper ball socket pressure cover 11 and a slipper pressure cover 12 which are sequentially arranged on the side of the slipper 10 close to the connecting rod 13, a slipper pressure cover O-ring 45 is arranged between the slipper pressure cover 12 and the slipper 10, the slipper 10, the slipper ball socket pressure cover 11 and the slipper pressure cover 12 define a second connecting cavity, and the other end of the connecting rod 13 is adapted to the shape of the second connecting cavity and is arranged in the second connecting cavity.

[0065] In this embodiment, the distribution friction mechanism includes: a distribution plate 29, which is arranged in the accommodating cavity and connected to the rear end cover 32 through the distribution plate 29 and the distribution plate 29 fastening screws 34, and a distribution plate O-type sealing ring 30 is arranged between the distribution plate 29 and the rear end cover 32; the floating sleeve 25 is pressed on the floating liner 28 by interference fit, the floating sleeve 25 is sealed and connected to the cylinder body 21, and the floating sleeve O-type sealing ring 26 and the gasket 27 are arranged at the connection, the floating liner 28 is connected to the distribution plate 29, and the cylinder body 21 can drive the floating liner 28 to rotate through the floating sleeve 25. The spring seat 35 is connected to the floating liner 28 and extends into the cylinder body 21; the center spring 36 is arranged on the spring seat 35 and connected to the transmission shaft 1, and the center spring 36 has an elastic tendency toward the front end cover 6, and the center spring 36 is used to provide a preload force so that the sliding shoe 10 is tightly connected with the wear-resistant liner 9.

[0066] The specific working process is as follows:

[0067] When this embodiment is applied to an axial piston 19 pump, the driving motor drives the transmission shaft 1 to rotate with the input torque through the main shaft transmission key 2, thereby driving the rotating body structure of the piston 19 pump to rotate synchronously. The cylinder body 21 rotates under the action of the transmission shaft 1, driving the gear ring 42 and the drum gear return plate 41 to rotate in turn, and the sliding shoe 10 is driven by the drum gear return plate 41 to slide on the wear-resistant lining 9. Since the wear-resistant lining 9 is arranged on the inclined surface and the drum gear return plate 41 is inclined, as shown in the figure, when the drum gear return plate 41 rotates to the bottom end of the inclined surface, under the reaction force of the wear-resistant lining 9 and the structure of the drum gear return plate 41, the connecting rod 13 and the plunger 19 slide in the plunger sleeve 20 in the direction away from the front end cover 6. Conversely, when the drum gear return plate 41 rotates to the top end of the inclined surface, under the action of the drum gear return plate 41, the connecting rod 13 and the plunger 19 slide in the plunger sleeve 20 in the direction close to the front end cover 6. If the transmission shaft 1 continues to rotate, the plunger 19 moves back and forth, thereby realizing the suction and drainage function of the plunger 19 pump. The floating lining plate 28 rotates and slides along the surface of the distribution plate 29 under the action of the cylinder body 21 and the floating sleeve 25 .

[0068] When this embodiment is applied to the axial piston 19 motor, the working process is completely opposite. Under the action of high-pressure water, the piston 19 makes the sliding shoe 10 act on the wear-resistant lining 9 through the connecting rod 13. The wear-resistant lining 9 transmits the reaction force to the piston 19 by relying on the structural action of the inclined surface and the drum-shaped tooth return plate 41, so that the cylinder body 21 generates torque, and transmits the torque to the transmission shaft 1 through the flat key 37, and then the power output value is transmitted to the power unit through the transmission shaft 1.

[0069] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0070] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A high-speed and high-pressure axial connecting rod plunger device driven by a gear ring, characterized in that: include: The housing (23) defines a receiving chamber inside, and the front and rear ends of the receiving chamber are respectively a front cover (6) and a rear cover (32); A cylinder body (21) is rotatably disposed in the accommodating cavity; A transmission shaft (1) passes through the front end cover (6) and is in transmission connection with the cylinder body (21); A gear ring (42) connected to the cylinder body (21) and perpendicular to the axis of the transmission shaft (1); The drum-shaped gear return plate (41) is arranged obliquely relative to the axis of the transmission shaft (1) and is in driving connection with the gear ring (42); the gear ring (42) is used to drive the drum-shaped gear return plate (41) to rotate, and the drum-shaped gear return plate (41) can slide against the inner teeth of the gear ring (42) during the rotation process; A plunger friction mechanism is slidably arranged in the cylinder body (21) along the axial direction of the transmission shaft (1); A sliding shoe friction mechanism is arranged in the accommodating cavity and connected to the front end cover (6), and the sliding shoe friction mechanism is connected to the plunger friction mechanism; A flow distribution friction mechanism is arranged in the accommodating cavity and connected to the rear end cover (32); the flow distribution friction mechanism is connected to the cylinder body (21).

2. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 1, characterized in that: A mounting hole is provided in the middle of the drum-shaped gear return plate (41), the inner side surface of the mounting hole is an arc surface (46), a ball joint (40) is provided in the mounting hole, and the drum-shaped gear return plate (41) is spherically matched with the ball joint (40) and is connected to the transmission shaft (1) through the ball joint (40).

3. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 2, characterized in that: The tooth profile of the gear ring (42) is an involute tooth profile, and the tooth profile of the drum-shaped tooth return plate (41) is an arc tooth profile.

4. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 1, characterized in that: The plunger friction mechanism comprises: A plunger sleeve (20) is embedded in the cylinder body (21); A plunger (19) is slidably disposed in the inner hole of the plunger sleeve (20); A plunger ball-and-socket assembly, wherein a mounting seat is provided on a side of the plunger (19) close to the sliding shoe friction mechanism, and the plunger ball-and-socket assembly is sealed and arranged in the mounting seat; a plunger damping adjustment screw plug (24) is provided on a side of the plunger (19) away from the sliding shoe friction mechanism; A connecting rod (13) has one end connected to the plunger ball-socket assembly and the other end connected to the sliding shoe friction mechanism.

5. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 4, characterized in that: The sliding shoe friction mechanism comprises: A swash plate (7) is disposed in the accommodating cavity and connected to the front end cover (6), and a side of the swash plate close to the connecting rod (13) is an inclined surface; A wear-resistant lining plate (9) is arranged on the inclined surface; A sliding shoe (10) is arranged on the drum-shaped tooth return plate (41) and is in contact with the surface of the wear-resistant lining plate (9); A sliding shoe ball and socket assembly, wherein the sliding shoe (10) is connected to the other end of the connecting rod (13) via the sliding shoe ball and socket assembly; When the gear ring (42) drives the drum-shaped gear return plate (41) to rotate, the sliding shoe (10) rotates by friction on the surface of the wear-resistant lining plate (9); when the sliding shoe (10) rotates to the end with a lower inclined surface, the plunger (19) and the drum-shaped gear return plate (41) slide in a direction away from the front end cover (6); when the sliding shoe (10) rotates to the end with a higher inclined surface, the plunger (19) and the drum-shaped gear return plate (41) slide in a direction close to the front end cover (6).

6. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 5, characterized in that: The flow distribution friction mechanism comprises: A distribution plate (29), disposed in the accommodating cavity and connected to the rear end cover (32); The floating liner (28) is connected to the cylinder body (21) through a floating sleeve (25). The floating liner (28) is connected to a distribution plate (29). The cylinder body (21) can drive the floating liner (28) to rotate through the floating sleeve (25).

7. A high-speed and high-pressure axial connecting rod plunger device with gear ring transmission according to claim 6, characterized in that: Also includes: A spring seat (35) connected to the floating liner (28) and extending into the cylinder body (21); A center spring (36) is arranged on the spring seat (35) and connected to the transmission shaft (1). The center spring (36) has an elastic tendency toward the front end cover (6). The center spring (36) can make the sliding shoe (10) and the wear-resistant lining plate (9) tightly connected.

8. The high-speed and high-pressure axial connecting rod plunger device of a gear ring transmission according to claim 5, characterized in that: The plunger ball and socket assembly comprises: The plunger ball socket lower sleeve (17) is arranged in the mounting seat through the ball socket lower sleeve O-type sealing ring (18); the plunger ball socket upper sleeve (16) is arranged on the side of the plunger ball socket lower sleeve (17) close to the connecting rod (13); The ball socket upper sleeve pressure cover (14) is arranged on the side of the plunger ball socket upper sleeve (16) close to the sliding shoe (10) through the ball socket upper sleeve O-ring, and the plunger ball socket lower sleeve (17), the plunger ball socket upper sleeve (16) and the ball socket upper sleeve pressure cover (14) define a first connecting cavity, and one end of the connecting rod (13) is adapted to the shape of the first connecting cavity and is arranged in the first connecting cavity.

9. The high-speed and high-pressure axial connecting rod plunger device of a gear ring transmission according to claim 5, characterized in that: The sliding shoe ball socket assembly comprises: a sliding shoe ball socket pressure cover (11) and a sliding shoe pressure cover (12) which are sequentially arranged on a side of the sliding shoe (10) close to a connecting rod (13); the sliding shoe (10), the sliding shoe ball socket pressure cover (11) and the sliding shoe pressure cover (12) define a second connecting cavity; the other end of the connecting rod (13) is adapted to the shape of the second connecting cavity and is arranged in the second connecting cavity.

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