CN111022426B - Flexibly-supported coaxial-drive high-speed high-pressure connecting rod plunger device - Google Patents
Flexibly-supported coaxial-drive high-speed high-pressure connecting rod plunger device Download PDFInfo
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- CN111022426B CN111022426B CN201911369825.XA CN201911369825A CN111022426B CN 111022426 B CN111022426 B CN 111022426B CN 201911369825 A CN201911369825 A CN 201911369825A CN 111022426 B CN111022426 B CN 111022426B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
Abstract
本发明公开了一种柔性支撑的同轴驱动高速高压连杆柱塞装置，包括机械密封结构、O型圈、组合式衬板、压盘、球较、柱塞、弹簧垫圈、壳体、后端盖、紧固螺栓、密封压盖、前端盖、斜盘、第一滑动轴承、轴销、滑盘、连杆、中心弹簧、缸体、配流盘、主轴、和第二滑动轴承。本发明综合斜盘式柱塞泵、斜轴式柱塞泵及浮杯泵的优点，采用通轴式缸体支撑结构、锥形缸体、球面配流盘、连杆柱塞结构与柔性支撑的同轴驱动结构。连杆柱塞泵的旋转组件由滑盘、连杆、柱塞及锥形缸体组成，柔性支撑滑盘副的应用不仅增大了摩擦副的接触面积，而且减小了对材料许用PV值的要求，同时减小了滑盘副的泄漏量，增加了连杆柱塞泵在高速工况下的生存能力。
The invention discloses a flexible supported coaxially driven high-speed high-pressure connecting rod plunger device, comprising a mechanical seal structure, an O-ring, a combined liner, a pressure plate, a ball cage, a plunger, a spring washer, a casing, a rear End cover, fastening bolt, sealing gland, front end cover, swash plate, first sliding bearing, shaft pin, sliding plate, connecting rod, center spring, cylinder block, valve plate, main shaft, and second sliding bearing. The invention integrates the advantages of the swash plate type plunger pump, the inclined axis type plunger pump and the floating cup pump, and adopts the through shaft type cylinder block support structure, the conical cylinder block, the spherical flow distribution plate, the connecting rod plunger structure and the flexible support. Coaxial drive structure. The rotating components of the connecting rod plunger pump are composed of a sliding plate, a connecting rod, a plunger and a conical cylinder. The application of the flexible supporting sliding plate pair not only increases the contact area of the friction pair, but also reduces the allowable PV of the material. At the same time, the leakage of the sliding plate pair is reduced, and the survivability of the connecting rod piston pump under high-speed conditions is increased.
Description
Technical Field
The invention belongs to the technical field of hydraulic transmission and control, and particularly relates to a flexible-support coaxial driving structure and a connecting rod plunger pump or motor comprising the same.
Background
The seawater hydraulic transmission technology directly taking natural seawater as a hydraulic medium has the outstanding advantages of compatibility with specific environmental conditions of the ocean, no environmental pollution, good safety, economy, energy conservation and the like, has wide application prospect in the fields of naval equipment, ocean engineering, underwater operation, deep sea space stations, buoyancy adjustment of deep diving investigation ships, reverse osmosis seawater desalination systems, high-pressure water cleaning, fire extinguishing of high-rise buildings and the like, and has become a very important development direction of the international hydraulic technology.
The seawater hydraulic pump is the heart of the seawater hydraulic transmission system, and the research is focused on how to enable the seawater hydraulic pump which takes seawater with physicochemical characteristics of small viscosity, poor lubricity, high conductivity, high vaporization pressure, high pollution and the like as a medium to generate high speed, high pressure, low vibration, low noise and high reliability equivalent to that of the oil hydraulic pump, so that the seawater hydraulic system can efficiently transmit larger power with smaller volume like the oil hydraulic system.
The traditional mineral hydraulic oil drive pump has the structural forms of gear type, vane type, plunger type and the like. Due to the particularity of the hydraulic drive of the water, the requirements of the hydraulic pump of the water have larger difference. Bhusban B. et al of NECL, USA found through experiments that the PV value of the same material in the axial plunger pump is only 1/3 of a vane pump and 1/10 of a gear pump, and the PV value of a radial dynamic pressure bearing is about 1/4 of the gear pump, so that the structural form of the axial plunger pump is more beneficial to reducing the requirement on the wear resistance of the material. In the plunger pump, the crankshaft drives the plunger pump and the radial plunger pump to have larger weight and volume of unit power, and the axial plunger pump has the characteristics of compact structure, high output pressure, high efficiency, long service life and the like. Therefore, the axial plunger pump is the main structural type of the high-speed high-pressure seawater pump.
The full-seawater lubrication swash plate type axial plunger seawater pump is a structural form adopted by almost all seawater and fresh water hydraulic pumps, and is provided with four key friction pairs (respectively a plunger pair, a sliding shoe pair, a flow distribution pair and a sliding bearing), wherein the support modes of the plunger pair, the sliding shoe pair and the flow distribution pair are dynamic and static pressure support comprehensive modes, and the sliding bearing is only dynamic pressure support. The slipper pair consists of a slipper and a swash plate, the slipper takes the swash plate as a support to push the plunger to do axial motion and simultaneously slides on the swash plate at a high speed, the slipper bears the hydraulic pressure from one side of the plunger, the supporting force of the swash plate, the pressure of a return plate, the self inertia force, the streaming resistance, the streaming lift force and the viscous friction force, and the slipper can overturn under the action of the centrifugal force, the self inertia force, the streaming resistance, the streaming lift force and the friction force to cause eccentric wear of the slipper, and the water film stability is damaged to further cause the phenomenon of wearing and burning the slipper; the flow distribution pair consists of a flow distribution plate and a cylinder body, and the supporting force of the swash plate enables a wedge-shaped gap to be formed between the cylinder body and the flow distribution plate through the lateral force of the plunger acting on the cylinder body and the centrifugal force of the plunger, so that the volume loss of the pump is increased, and the surface burn between the cylinder body and the flow distribution plate is caused; the plunger pair consists of a plunger and the wall of a cylinder plunger cavity, the plunger reciprocates and rotates at a high speed in the cylinder plunger cavity, the plunger and the cylinder plunger cavity are complex in stress and high in fit clearance requirement, the plunger often has scratches, bulges and breaks, and the cylinder body has scratches, cracks, sleeve pulling and the like. When the axial plunger pump is in a high-speed and high-pressure working condition, the possibility of failure of three key friction pairs, namely the sliding shoe pair, the plunger pair and the flow distribution pair, is increased, and the working performance of the whole water hydraulic pump is seriously influenced. Therefore, a novel key friction pair structural style is designed according to a high-speed high-pressure high-pollution working condition, overturning of a sliding shoe can be eliminated or reduced, the lateral force of a plunger acting on a cylinder body is reduced, a wedge-shaped gap between the cylinder body and a valve plate is reduced, the working performance of a seawater plunger pump under the high-speed high-pressure working condition is improved, and the service life of the seawater plunger pump is prolonged.
Disclosure of Invention
The invention mainly solves the technical problem of providing a flexible-support coaxial driving connecting rod plunger pump or motor which can adapt to high-speed, high-pressure and high-pollution working conditions. The coaxial driving structure of the flexible support can reduce the wedge-shaped clearance in the running process of the sliding disc, and enables the axes of the connecting rod and the cylinder hole to be always in the same plane, thereby improving the volumetric efficiency of a plunger pump or a motor, improving the abrasion of the connecting rod caused by the movement of the sliding disc driven by the connecting rod, and improving the reliability of the connecting rod and the plunger. The sliding shoe auxiliary structure replaces the traditional sliding shoe auxiliary structure, the integral sliding disc auxiliary structure is adopted, meanwhile, the cylinder body is a conical cylinder body, the radius of a distributed circle of a sliding disc ball socket is larger than that of the bottom surface of a cone formed by the axes of cylinder holes, and the bottom surface of the cone passes through the circle center of the ball socket at the upper dead point and is perpendicular to the axis of a main shaft, so that the lateral force borne by the plunger is reduced, and the lubricating state of the plunger is improved.
Under the high-speed high-pressure working condition, the sliding disc pair structure adopting the flexible support not only increases the contact area of the friction pair, effectively reduces the PV value of the friction pair, but also reduces the leakage of the sliding disc pair, and has good stability and volume efficiency even under the high-speed high-pressure working condition; the coaxial driving mode replaces the driving mode that the sliding disc is driven by the connecting rod to rotate, so that the main shaft, the cylinder body and the sliding disc can coaxially rotate, and the abrasion of the connecting rod caused by the direct contact of the connecting rod and a cylinder hole due to the driving of the connecting rod is avoided, and the condition is particularly serious under high speed and high pressure; the double-end connecting rod plunger structure reduces the lateral force borne by the plunger while keeping good sealing performance, relieves the risk of pulling and abrasion of the plunger by a cylinder hole in an inclined state, increases the return force borne by the plunger, improves the return stroke of the plunger, and reduces the possibility of suction of the plunger pump at high speed. The friction pair in the patent adopts a hard-hard pairing form, so that the friction pair is not easy to wear under high pollution degree, and still has good sealing and stability, the survival capability of the friction pair under extreme working conditions is greatly improved, and the service life of the plunger pump is prolonged.
The invention adopts the following technical scheme:
the utility model provides a high-speed high-pressure connecting rod plunger sea water pump of coaxial drive of flexible support or motor, the coaxial drive structure of flexible support is used for plunger pump or motor, and this coaxial drive structure of flexible support includes flexible support combination formula welt (3), pressure disk (4), ball pivot (5), sloping cam plate (13), first slide bearing (14), pivot (15), sliding tray (16), key (18), toper cylinder body (20), main shaft (21) and second slide bearing (23). The main shaft (22) is provided with a key groove at the matching part of the main shaft and the conical cylinder body (20), a pin hole is formed at the part corresponding to the sliding disc (16), the main shaft (22) and the pin shaft (15) simultaneously drive the cylinder body (20) and the sliding disc (16) to rotate through a key (18), and the pin shaft (15) drives the sliding disc (16) to slide on the swash plate and simultaneously slide in the pin groove.
The combined lining plate (3) is of a rubber combined structure with two sides made of stainless steel and the middle made of the stainless steel, and the three are assembled together through a vulcanization process. When the plunger pump works, the slide disc (16) is under the action of a water film on one side of a high-pressure area, rubber in the middle of the combined lining plate (3) is under the compression action, rubber on the other side of the combined lining plate is under the tension action, and the combined lining plate (3) can be tilted in a low-pressure area. In the working process of the plunger pump, the combined lining plate (3) can be tightly attached to the sliding disc (16), so that the thickness of an auxiliary water film of the sliding disc is reduced, and the volumetric efficiency of the plunger pump is increased.
The shaft pin (15) can also be drum-shaped teeth, the drum-shaped teeth and the sliding disc (16) form a gear transmission mechanism, the main shaft (22) and the drum-shaped teeth simultaneously drive the cylinder body (20) and the sliding disc (16) to rotate through the key (18), and the drum-shaped teeth (15) drive the sliding disc (16) to slide on the swash plate and simultaneously slide in the inner teeth processed by the sliding disc (16).
The main shaft (20) is provided with a key groove at a position corresponding to the cylinder body (20), the main shaft (20) is provided with a pin hole or is processed with drum-shaped teeth at a position corresponding to the sliding disc (16), the main shaft (20) is provided with a ceramic or hard alloy coating at the positions of the swash plate (13) and the rear end cover (9), and the two positions can form a first sliding bearing (14) and a second sliding bearing (23) together with the swash plate (13) and the rear end cover (9).
The radius of the ball socket distribution circle of the sliding disc (16) is larger than the radius of the conical bottom surface formed by the axes of the cylinder holes, and the conical bottom surface passes through the center of the ball socket at the top dead center and is vertical to the axis of the main shaft (22). The rear end cap (9) is provided with a flow channel (h) for the lubrication of the slide bearing at the second slide bearing (23).
The sliding disc (16) is connected with the pressure plate (4) through a bolt, a plurality of ball sockets are arranged on one side of the sliding disc (16), the face, which is in contact with the side, provided with the ball sockets, of the sliding disc (16) on the pressure plate (4) is provided with the ball sockets with the same size and number, and the ball sockets formed by the pressure plate (4) and the sliding disc (16) can constrain the ball head of the connecting rod and drive the connecting rod (17) to move.
Symmetrical pin grooves or drum-shaped teeth are formed in the inner circle of the sliding disc (16), spherical surfaces with the same radius as the spherical hinge (5) are processed in the inner circle of the pressing disc (4), the pin grooves are in clearance fit with the pin shaft (15) or are matched with the drum-shaped teeth, the sliding disc (16) is tightly attached to the combined lining plate (3) and the swash plate (13) under the action of the spherical hinge (5), and slides on the combined lining plate (3) and the swash plate (13) under the driving of the pin shaft (15) or the drum-shaped teeth.
The cylinder body (20) is assembled with the main shaft (22) through two keys in an interference fit mode, when the main shaft (22) rotates, the main shaft (22) drives the cylinder body (20) to rotate on the valve plate (21) through the keys (18), and the axis of a cylinder hole and the axis of the main shaft form a certain included angle.
The coaxial high-speed high-pressure connecting rod plunger sea water pump or motor is flexibly supported and comprises a mechanical sealing structure (1), an O-shaped ring (2), a combined lining plate (3), a pressure plate (4), a spherical hinge (5), a plunger (6), a spring washer (7), a shell (8), a rear end cover (9), a fastening bolt (10), a sealing gland (11), a front end cover (12), a swash plate (13), a first sliding bearing (14), a shaft pin (15), a sliding disc (16), a connecting rod (17), a central spring (19), a cylinder body (20), a valve plate (21), a main shaft (22) and a second sliding bearing (23). The main shaft (22) is coincident with the axis of the cylinder body (20) and penetrates through the front end cover (12), the swash plate (13), the combined lining plate (3), the sliding disc (16), the spherical hinge (5), the cylinder body (20) and the valve plate (21), and is supported by a first sliding bearing (14) in the swash plate (13) and a second sliding bearing (23) at the rear end cover (9), the cylinder body (20) is matched on the main shaft (22) through interference, and transmits torque through a key (18), symmetrical pin grooves or inner drum-shaped teeth are formed in the inner circle of the sliding disc (16), driven by a shaft pin (15) on the main shaft (22) or a drum-shaped tooth processed on the shaft and slides on the combined lining plate (3) under the action of the spherical hinge (5) and the central spring (19), the first plain bearing (14) can be lubricated by a working medium via the pin grooves or drum-type tooth grooves.
When the mechanism is a plunger pump, a motor drives a main shaft (22) to rotate, under the driving of drum-shaped teeth processed on a key (18) and a shaft pin (15) or the main shaft, a cylinder body (20) and a sliding disc (16) coaxially rotate around an axis, the sliding disc (16) is tightly attached to and slides on a combined lining plate (3) or a swash plate (13) under the action of the pressure of a central spring (19) and the reverse thrust of a water film of a flow distribution disc (21), a plunger (6) reciprocates in a conical cylinder hole to realize the water suction and drainage work of the connecting rod plunger pump, the cylinder body (20) and the sliding disc (16) rotate at the same angular speed, and a connecting rod (14) is not in contact with the cylinder body (20) and does not generate friction and abrasion.
When the mechanism is a motor, under the action of high-pressure water, the pressure of a plunger cavity acts on the swash plate (13) through the plunger (6), the radial component force of the reaction force of the swash plate (13) to the plunger (6) enables the cylinder body (20) to generate torque, the torque is transmitted to the main shaft (22) through the key (18), and the main shaft (22) drives a load to do work.
Advantageous effects
1. According to the coaxial driving structure adopting the flexible support, when the pump or the motor moves at a high speed, the cylinder body and the sliding disc rotate coaxially, the axis of the connecting rod is always in the same plane with the axis of the plunger, the connecting rod and the cylinder body rotate without phase difference, and the connecting rod is not in direct contact with the cylinder body, so that the connecting rod and the cylinder body are prevented from being rubbed under the high-speed heavy-load working condition, the reliability of parts is reduced, the vibration noise of the plunger pump is reduced, and the coaxial driving structure is favorable for the pump or the motor to work under the high-speed working condition.
2. The invention adopts a swash plate type plunger connecting rod structure and a conical cylinder body structure, the radius of a distributed circle of a ball socket of a sliding plate is larger than that of a conical bottom surface formed by the axes of cylinder holes, and the conical bottom surface passes through the center of the ball socket at the top dead center and is vertical to the axis of a main shaft. When the pump or the motor moves at a high speed, the centrifugal force borne by the rotating assembly cannot be ignored, when the radius of the distributed circle of the sliding disc ball socket is larger than the radius of the bottom surface of the cone formed by the axes of the cylinder holes, the connecting rod plunger structure can reduce the lateral force borne by the cylinder body, can provide the return force of the plunger simultaneously, avoids the suction phenomenon, and the smaller lateral force makes the plunger pair possible to apply hard-hard pairing in material selection.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a flexibly supported coaxial drive high-speed high-pressure connecting rod plunger sea water pump or motor according to the invention;
FIG. 2 is a schematic structural view of an embodiment of a flexibly supported coaxial drive high-speed high-pressure connecting rod plunger sea water pump or motor when the coaxial drive structure is a drum-shaped tooth drive;
FIG. 3 is a front view and a cross-sectional view of the modular liner;
FIG. 4 is a cross-sectional view of the spindle when the coaxial drive configuration is a pin drive;
FIG. 5 is a cross-sectional view of the cylinder;
FIG. 6 is a schematic view of the structure of the sliding plate;
FIG. 7 is a cross-sectional view of the rear end cap.
In the figure: 1. mechanical sealing structure, 2, O-shaped ring, 3, combined lining plate 4, pressure plate, 5, spherical hinge, 6, plunger, 7, central spring washer, 8, shell, 9, rear end cover, 10, fastening bolt, 11, mechanical sealing gland, 12, front end cover, 13, swash plate, 14, first sliding bearing, 15, shaft pin or drum-shaped tooth, 16, sliding plate, 17, double-end connecting rod, 18, key, 19, central spring, 20, conical cylinder body, 21, valve plate, 22, main shaft, 23, second sliding bearing,
a. the combined lining plate comprises a rubber part, a first key groove, a ceramic spraying surface, a pin hole or a drum-shaped tooth, a second key groove, a ceramic spraying surface, a sliding disc auxiliary supporting drainage port, a sliding disc auxiliary supporting surface texture structure and a second sliding bearing lubricating flow passage, wherein the rubber part is arranged in the combined lining plate, the first key groove is arranged on the main shaft, the ceramic spraying surface corresponds to the first sliding bearing, the pin hole or the drum-shaped tooth is arranged on the main shaft, the second key groove is arranged on the main shaft, the ceramic spraying surface corresponds to the second sliding bearing, the sliding disc auxiliary supporting drainage port is arranged on the main shaft, the sliding disc auxiliary supporting surface texture structure is arranged on the main shaft, and the second sliding bearing lubricating flow passage is arranged on the main shaft.
Detailed Description
The invention is explained in more detail below with reference to examples and the accompanying drawings:
the driving mode of the sliding plate can be shaft pin driving and drum-shaped tooth driving, and for convenience of description, the embodiment of the invention is shown in a simpler shaft pin driving mode.
Fig. 1 shows an embodiment of a flexibly-supported coaxial-drive high-speed and high-pressure connecting rod plunger seawater pump or motor according to the present invention, where the coaxially-driven connecting rod plunger pump includes a mechanical seal structure (1), a combined lining plate (3), a pressure plate (4), a spherical hinge (5), a plunger (6), a housing (8), a rear end cover (9), a front end cover (12), a swash plate (13), a first sliding bearing (14), a sliding plate (16), a connecting rod (17), a center spring (19), a cylinder block (20), a port plate (21), a main shaft (22), and a second sliding bearing (23). The main shaft (22) is coincident with the axis of the cylinder body (20), penetrates through the front end cover (12), the swash plate (13), the combined lining plate (3), the sliding plate (16), the spherical hinge (5), the cylinder body (20) and the valve plate (21), is supported by a first sliding bearing (14) in the swash plate (13) and a second sliding bearing (23) at the rear end cover (9), the cylinder body (20) is matched on the main shaft (22) in an interference fit manner, and transmits torque through a key (18), the key (18) can be a flat key, symmetrical pin grooves are formed in the inner circle of the sliding plate (16), and are driven by a pin (15) on the main shaft (22) and slide on the combined lining plate (3) under the action of the spherical hinge (5) and a central spring (19), a working medium of the first sliding bearing (14) can be lubricated through the pin grooves or drum-type tooth grooves, when the main shaft (22) rotates, under the drive of the key (18) and the shaft pin (15), the cylinder body (20) and the sliding disc (16) coaxially rotate around the axis, the sliding disc (16) is tightly attached to the combined lining plate (3) or the swash plate (13) and slides under the action of the pressure of the central spring (19) and the centrifugal force of the connecting rod plunger, the plunger (6) reciprocates in the tapered cylinder hole to realize the water suction and drainage work of the connecting rod plunger pump motor, the cylinder body (20) and the sliding disc (16) rotate at the same angular speed, and the connecting rod (14) is not in contact with the cylinder body (20) and does not generate friction and wear.
Fig. 2 shows an embodiment of the flexible-supported coaxial driving high-speed high-pressure connecting rod plunger sea water pump or motor when the coaxial driving structure is a drum-shaped tooth driving structure, and unlike the shaft pin driving, drum-shaped teeth are processed at the inner circle of the sliding disc (16) and are used for matching with the drum-shaped teeth on the main shaft (22). In the running process of the plunger pump or the motor, the drum-shaped teeth on the main shaft (22) drive the sliding disc (16) to rotate, and the sliding disc (16) and the cylinder body (20) rotate coaxially.
Fig. 3 is a front view and a cross-sectional view of the combined liner plate, wherein the combined liner plate (3) is a combined structure with two sides made of stainless steel and the middle made of rubber (a), and the combined liner plate, the stainless steel and the rubber (a) are assembled together through a vulcanization process. When the plunger pump works, the slide disc (16) is under the action of a water film on one side of a high-pressure area, rubber in the middle of the combined lining plate (3) is under the compression action, rubber on the other side of the combined lining plate is under the tension action, and the combined lining plate (3) can be tilted in a low-pressure area. In the working process of the plunger pump, the combined lining plate (3) can be tightly attached to the sliding disc (16), so that the thickness of an auxiliary water film of the sliding disc is reduced, and the increase of the volume efficiency of the plunger pump is facilitated.
Fig. 4 is a sectional view of the spindle, a key groove is formed at the foremost end of the spindle (22) to realize transmission of motor torque, symmetrical key grooves (d) and pin holes (c) are formed at positions of the cylinder block (20) corresponding to the swash plate (13) to realize torque transmission to the cylinder block (20) and the sliding plate (16), the first sliding bearing friction surface (b) and the second sliding bearing friction surface (e) are arranged at positions of the spindle (22) corresponding to the swash plate (13) and the rear end cover (9) and can be sprayed with ceramic or hard alloy, the key groove (d) is formed at a position of the spindle (22) corresponding to the cylinder block (20), and the spindle (22) and the cylinder block (20) are in interference fit.
Fig. 5 is a sectional view of the cylinder body, a stepped through hole is formed at the axis of the cylinder body (20), symmetrical key grooves (d) are formed in the small stepped hole, and the large stepped hole is smooth and cylindrical and is used for mounting the center spring (19). The cylinder holes (g) corresponding to the number of the plungers are machined in the circumferential direction of the cylinder body (20), the axis of each cylinder hole (g) forms a certain angle with the axis of the cylinder body (20), and the flow distribution surface of the cylinder body (20) is a spherical surface.
Fig. 6 is a schematic structural diagram of the slide plate, wherein ball sockets (h) corresponding to the number of plungers are processed on the connecting rod (17) side of the slide plate (16), and a water chamber (i) for supporting the slide plate (16) is processed on the opposite side of the ball sockets (h). The sliding disc (16) is matched with the pressure disc (4) to complete the driving and the return stroke of the connecting rod (17). Symmetrical pin grooves (l) are machined in the inner hole of the sliding disc (16) and matched with the shaft pin (15) to complete torque transmission of the shaft (22) to the sliding disc (16). The sliding disc (16) can be tightly attached to the combined lining plate (3) or the swash plate (13) under the action of the central spring (19). The auxiliary bearing surface of the sliding disk (16) is provided with a drainage port (f) and a texture structure (g) which can provide dynamic pressure bearing force for the sliding disk.
Fig. 7 is a sectional view of the rear end cap, a blind hole is processed at the axis of the rear end cap (9), the blind hole can form the second sliding bearing (23) together with the main shaft (22), a flow passage (h) for lubricating the sliding bearing is processed at the front and the rear of the second sliding bearing (23), the flow passage (h) is communicated with the inside of the shell, and a water outlet (m) and a water suction port (n) are processed at the position of the rear end cap corresponding to the waist-shaped groove of the port plate.
Claims (7)
1. The utility model provides a high-speed high-pressure connecting rod plunger device of coaxial drive of flexible support which characterized in that: the flexible supporting coaxial driving structure comprises a flexible supporting combined lining plate (3), a pressure plate (4), a spherical hinge (5), a swash plate (13), a first sliding bearing (14), a shaft pin (15), a sliding plate (16), a key (18), a conical cylinder body (20), a main shaft (22) and a second sliding bearing (23), a key groove for the key (18) is arranged at the part of the main shaft (22) matched with the cylinder body (20), the part of the main shaft (22) corresponding to the sliding disc (16) is provided with a pin hole for the shaft pin (15), the main shaft (22) and the shaft pin (15) drive the cylinder body (20) and the sliding disc (16) to rotate simultaneously through the key (18), the shaft pin (15) drives the sliding disc (16) to slide on the swash plate and simultaneously slides in a pin groove of the sliding disc (16);
the shaft pin (15) is a drum-shaped tooth, the drum-shaped tooth and the sliding disc (16) form a gear transmission mechanism, a main shaft (22) and the drum-shaped tooth drive the cylinder body (20) and the sliding disc (16) to rotate simultaneously through a key (18), and the drum-shaped tooth drives the sliding disc (16) to slide on the swash plate and simultaneously slide in the inner teeth of the sliding disc (16); the two sides of the combined lining plate (3) are made of stainless steel materials, the middle of the combined lining plate is made of rubber, the stainless steel materials, the rubber and the rubber are assembled together through a vulcanization process, when the plunger pump works, the slide disc (16) is under the acting force of a water film on one side of a high-pressure area, the rubber in the middle of the combined lining plate (3) is under the compression action, the rubber in the middle of the combined lining plate (3) is under the tension action on one side of a low-pressure area, and the combined lining plate (3) is tilted in the low-pressure area;
The main shaft (22) is provided with ceramic or hard alloy coatings at the positions of the swash plate (13) and the rear end cover (9), and the two positions, the swash plate (13) and the rear end cover (9) form a first sliding bearing (14) and a second sliding bearing (23);
the radius of a ball socket distribution circle of the sliding disc (16) is larger than the radius of a conical bottom surface formed by the axes of the cylinder holes, the conical bottom surface passes through the center of the ball socket at the top dead center and is vertical to the axis of the main shaft (22), and the rear end cover (9) is provided with a flow passage (h) for lubricating the sliding bearing at the second sliding bearing (23).
2. A flexibly supported coaxially actuated high speed high pressure connecting rod plunger assembly as claimed in claim 1, wherein: the sliding plate (16) is connected with the pressure plate (4) through a bolt, a plurality of ball sockets are arranged on one side of the sliding plate (16), the ball sockets with the same size and number are arranged on the surface, in contact with the side, provided with the ball sockets, of the sliding plate (16) on the pressure plate (4), and the ball sockets formed by the pressure plate (4) and the sliding plate (16) can restrict the ball head of the connecting rod and drive the connecting rod (17) to move.
3. A flexibly supported coaxially driven high speed, high pressure connecting rod plunger assembly as defined in claim 1 wherein: symmetrical pin grooves or drum-shaped teeth are formed in the inner circle of the sliding disc (16), spherical surfaces with the same radius as the spherical hinge (5) are processed in the inner circle of the pressure plate (4), the pin grooves are in clearance fit with the shaft pins (15) or are matched with the drum-shaped teeth, the sliding disc (16) is tightly attached to the combined lining plate (3) and the swash plate (13) under the action of the spherical hinge (5), and slides on the combined lining plate (3) and the swash plate (13) under the driving of the shaft pins (15) or the drum-shaped teeth.
4. A flexibly supported coaxially actuated high speed high pressure connecting rod plunger assembly as claimed in claim 1, wherein: the cylinder body (20) is assembled with the main shaft (22) through two keys in an interference fit mode, when the main shaft (22) rotates, the main shaft (22) drives the cylinder body (20) to rotate on the valve plate (21) through the keys (18), and the axis of a cylinder hole and the axis of the main shaft form a certain included angle.
5. A flexibly supported coaxially actuated high speed and high pressure connecting rod plunger assembly as claimed in any one of claims 1 to 4 wherein: a plunger pump or motor designed by utilizing a coaxially-driven high-speed high-pressure connecting rod plunger device with flexible support comprises a mechanical sealing structure (1), an O-shaped ring (2), a combined lining plate (3), a pressure plate (4), a spherical hinge (5), a plunger (6), a spring washer (7), a shell (8), a rear end cover (9), a fastening bolt (10), a sealing gland (11), a front end cover (12), a swash plate (13), a first sliding bearing (14), a shaft pin (15), a sliding disc (16), a connecting rod (17), a central spring (19), a cylinder body (20), a valve plate (21), a main shaft (22) and a second sliding bearing (23), wherein the main shaft (22) is superposed with the axis of the cylinder body (20) and penetrates through the front end cover (12), the swash plate (13), the combined lining plate (3), the sliding disc (16), the spherical hinge (5), the cylinder body (20) and the valve plate (21), the bearing is supported by a first sliding bearing (14) in a swash plate (13) and a second sliding bearing (23) at a rear end cover (9), a cylinder body (20) is matched on a main shaft (22) in an interference mode and transmits torque through a key (18), symmetrical pin grooves or inner drum-shaped teeth are formed in the inner circle of a sliding plate (16), the pin grooves or the inner drum-shaped teeth are driven by a shaft pin (15) on the main shaft (22) or drum-shaped teeth machined on the shaft and slide on a combined lining plate (3) under the action of a spherical hinge (5) and a central spring (19), and the first sliding bearing (14) is lubricated by a working medium through the pin grooves or the drum-shaped tooth grooves.
6. A flexibly supported coaxially actuated high speed high pressure connecting rod plunger assembly as claimed in claim 5, wherein: when the plunger pump is used, a motor drives the main shaft (22) to rotate, the cylinder body (20) and the sliding disc (16) synchronously rotate around the axis under the driving of the key (18), the shaft pin (15) or the drum-shaped teeth on the main shaft, the sliding disc (16) is tightly attached to the combined lining plate (3) or the swash plate (13) and slides under the action of the pressure of the central spring (19) and the water film reverse thrust of the flow distribution disc (21), the plunger (6) reciprocates in the conical cylinder hole to realize the water suction and drainage work of the connecting rod plunger pump, the cylinder body (20) and the sliding disc (16) rotate at the same angular velocity, and the connecting rod is not contacted with the cylinder body (20).
7. A flexibly supported coaxially actuated high speed high pressure connecting rod plunger assembly as claimed in claim 5, wherein: when the hydraulic motor is a motor, under the action of high-pressure water, the pressure of a plunger cavity acts on the swash plate (13) through the plunger (6), the radial component of the reaction force of the swash plate (13) to the plunger (6) enables the cylinder body (20) to generate torque, the torque is transmitted to the main shaft (22) through the key (18), and the load is driven to do work through the main shaft (22).
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| CN201911369825.XA CN111022426B (en) | 2019-12-26 | 2019-12-26 | Flexibly-supported coaxial-drive high-speed high-pressure connecting rod plunger device |
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| CN201911369825.XA CN111022426B (en) | 2019-12-26 | 2019-12-26 | Flexibly-supported coaxial-drive high-speed high-pressure connecting rod plunger device |
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| CN111022426B true CN111022426B (en) | 2022-05-24 |
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| CN111765229A (en) * | 2020-06-28 | 2020-10-13 | 重庆交通大学绿色航空技术研究院 | Tooth-coordinated swash plate rotary cylinder type axial piston drive device |
| CN112177876B (en) * | 2020-09-30 | 2021-07-16 | 厦门大学 | A Cylinder Outer Cone Type Strong Oil Suction Anti-cavitation Axial Piston Pump |
| CN112963324B (en) * | 2021-03-30 | 2025-10-31 | 陕西德立机电科技有限公司 | Anti-pollution swash plate type plunger pump and application method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067716A (en) * | 2018-05-22 | 2019-07-30 | 钟彪 | A kind of hydrostatic and swash plate plunger pump or motor comprising the structure |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3353637A (en) * | 1965-10-22 | 1967-11-21 | Gen Motors Corp | Servo motor |
| JPS5524206A (en) * | 1978-08-04 | 1980-02-21 | Hitachi Ltd | Servo-motor equipped with forced oiling apparatus |
| US4719847A (en) * | 1987-01-20 | 1988-01-19 | Blatt Leland F | Fluid pressure operated motor with positive locating device |
| CN1542295A (en) * | 2003-11-06 | 2004-11-03 | 浙江大学 | Fully water-lubricated pure water hydraulic axial piston pump/motor |
| CN2667193Y (en) * | 2003-12-26 | 2004-12-29 | 浙江大学 | Low-friction-wear pure water hydraulic axial plunger pump or motor |
| CN201531383U (en) * | 2009-08-18 | 2010-07-21 | 江苏欧盛液压科技有限公司 | Swash plate axial piston pump |
| CN201714608U (en) * | 2010-07-07 | 2011-01-19 | 江苏欧盛液压科技有限公司 | Valve plate piston pump |
| CN101956686B (en) * | 2010-10-21 | 2012-02-08 | 宁波广天赛克思液压有限公司 | Position-spring-force feedback type electric proportional variable axial plunger pump |
| CN103410655B (en) * | 2013-08-18 | 2016-04-13 | 北京工业大学 | A kind of flow distribution pair clearance magnetic force compensation-type water hydraulic motor |
| CN204212973U (en) * | 2014-09-28 | 2015-03-18 | 宁波广天赛克思液压有限公司 | A kind of plunger piston slippery boots structure for cam-type axial piston pump or motor |
| CN104476101A (en) * | 2014-11-10 | 2015-04-01 | 中国人民解放军第五七一九工厂 | Method for assembling and connecting without replacing plunger pump piston shoes assembly |
-
2019
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110067716A (en) * | 2018-05-22 | 2019-07-30 | 钟彪 | A kind of hydrostatic and swash plate plunger pump or motor comprising the structure |
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