CN221347141U - Floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies - Google Patents

Abstract

The utility model discloses a floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies, wherein a rotary table is arranged on a main shaft of an inner cavity of a pump body, two sides of the rotary table are symmetrically provided with ball sockets with the same number, two sides of the rotary table are respectively in spline connection or integrally formed with ball hinges, cylinder bodies are sleeved on the ball hinges, one side of each cylinder body, close to the rotary table, is provided with a plurality of cylinder holes, the cylinder holes are in one-to-one correspondence with the ball sockets, fine rod plungers are arranged in the cylinder holes, end plunger ball heads of the fine rod plungers extend out of the cylinder holes and extend into the ball sockets corresponding to the cylinder holes, one sides, far away from the rotary table, of the two cylinder bodies are provided with valve plates, the valve plates are obliquely fixed on the inner wall of the pump body, and the valve plates are tightly attached to the cylinder bodies in a sealing mode. The utility model greatly increases the number of the plungers to reduce flow pulsation, pressure pulsation and vibration noise of the plunger pump, and designs the transmission mechanism for ensuring constant-speed synchronous rotation of the inclined cylinder body and the main shaft to basically eliminate the lateral force and friction force of the plunger pair.

Description

Floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies

Technical Field

The utility model relates to the technical field of plunger pumps, in particular to a floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies.

Background

The double-carbon target is a main melody of the development of the current world, and provides new opportunities and challenges for the application, innovation and development of hydrodynamic technology. The hydrodynamic force is used as an important supporting technology in engineering machinery, aerospace navigation, manufacturing industry and other equipment, and needs to rapidly evolve in energy transformation so as to provide support for upgrading and updating of electromechanical equipment. The engineering machinery prime mover is replaced by an internal combustion engine, because the technical characteristics of the motor and the internal combustion engine are completely different, engineering machinery dynamoelectric machine brings forward new technical requirements and demands for a hydraulic power element of a swash plate type axial plunger pump, a plunger sliding shoe assembly in a traditional plunger sliding shoe type swash plate axial plunger pump and a related plunger pair and a sliding shoe pair thereof are key to the new technical requirements and demands that the traditional plunger sliding shoe type swash plate axial plunger pump cannot adapt to dynamoelectric machine, and because the lateral force of the plunger pair is too large, a cylinder body is easy to topple (directly influences the sealing and lubricating bearing performance of a flow distribution pair), the contact length of a plunger/cylinder hole is too long, the lubrication is insufficient, the PV value is too large, the inclination angle of a swash plate variable is limited to be generally not more than 20 degrees, and the like serious problems that the sliding shoe is easy to topple and the negative pressure of oil suction of a plunger cavity is insufficient due to the too large centrifugal force of the sliding shoe in the sliding shoe pair are solved.

Under the background, the inventor provides a novel floating swash plate type axial plunger pump, transfers huge lateral force of a plunger pair based on a principle of a two-force rod, counteracts the huge lateral force of the plunger pair transferred by digestion based on a static pressure supporting principle, and designs the floating swash plate type axial plunger pump with various structural schemes according to the huge lateral force, and applies for series of national utility model patents. The existing traditional axial plunger pumps, floating cup pumps and floating inclined disc type axial plunger pumps designed before still have the technical defects, the existing traditional axial plunger pumps and the floating inclined disc type axial plunger pumps designed before are mainly characterized in that the number of the plungers is generally 9 to 11, the number of the plungers is small, flow pulsation is large, pressure pulsation is large, pump vibration noise is obvious, the floating cup pumps are novel axial plunger pumps invented by the Netherlands INNAS in recent years, the number of the plungers of the pumps is expanded to 24, the flow pulsation, the pressure pulsation and the vibration noise of the pumps are obviously reduced, and new problems are brought. The plunger of the floating cup pump is a fixed plunger, namely the plunger is fixed on a main shaft, the plunger and the main shaft have no relative motion degree of freedom, the cylinder body is a split cylinder body, a plunger cavity is independently designed into a new part called a cup body, the cup body is movably sleeved on the fixed plunger, two ends of the cup body are clamped in the split cylinder body, the cup body is opposite to the split cylinder body, the relative sliding motion degree of freedom in a certain space is provided, namely the origin of the name of the floating cup pump, the cup body of the floating cup pump is driven by the plunger and the split cylinder bodies clamped on two sides of the cup body, the split cylinder body and the main shaft of the floating cup pump are connected and transmit torque through a transmission pin, and because the split cylinder body and the cup body are obliquely arranged compared with the main shaft, the rotating shaft of the split cylinder body of the floating cup pump and the rotating shaft of the main shaft are not in the same axis, and are in an inter-shaft angle, so the rotating speed of the split cylinder body of the floating cup pump and the rotating speed of the main shaft are not in the same rotating speed, intermittent lateral force and the friction force of the floating cup pump still exist, and the floating cup body is also in the relative sliding motion degree of the split cylinder body and the floating cup body.

Disclosure of utility model

The utility model aims to make up the defects of the prior art, further perfects the technical system of the floating swash plate type axial plunger pump, and provides the floating swash plate type axial plunger pump with the symmetrical inclined rotating assembly.

The utility model is realized by the following technical scheme:

The floating sloping cam plate type axial plunger pump with symmetrical sloping rotary components comprises a pump body, wherein a main shaft is arranged in the pump body, a rotary table is arranged on the main shaft, two sides of the rotary table are symmetrically provided with ball sockets with the same number, two sides of the rotary table are respectively in spline connection or are integrally formed with ball hinges on the main shaft, a cylinder body is arranged outside each ball hinge, a plurality of cylinder holes are arranged on one surface of each cylinder body, which is close to the rotary table, the cylinder holes are in one-to-one correspondence with the ball sockets, fine rod plungers are arranged in each cylinder hole, end plunger ball heads of the fine rod plungers extend out of the cylinder holes and extend into the ball sockets of the rotary table corresponding to the cylinder holes, one side, away from the rotary table, of each cylinder body is provided with a valve plate, the valve plate is fixed on the inner wall of the pump body at a certain sloping angle, and the valve plate surface is tightly attached to the bottom surface of the cylinder body;

The pump body comprises a front pump body and a rear pump body, bearings are arranged among the front pump body, the rear pump body and the main shaft, and a shaft seal is arranged between the front pump body and the main shaft; the number of the thin rod plungers is 26, 13 thin rod plungers are respectively arranged on two sides of the rotary table, and the thin rod plungers are symmetrically arranged on two sides of the rotary table;

The cylinder body is far away from the oil port hole of a plurality of oil through holes communicated with cylinder holes on one side of the rotary table, the valve plate is provided with an oil absorption waist type through hole and an oil discharge waist type through hole, the oil through holes are communicated with the oil absorption waist type through hole and the oil discharge waist type through hole on the valve plate, an oil inlet and an oil outlet are arranged on the pump body, an oil inlet runner and an oil outlet runner are arranged in the pump body, two ends of the oil inlet runner are respectively communicated with the valve plate oil absorption waist type through holes on two sides, and two ends of the oil outlet runner are respectively communicated with the valve plate oil discharge waist type through holes on two sides.

The cylinder body is characterized in that the spherical hinge is a cylindrical pin type spherical hinge, three synchronous cylindrical pins are fixed on the outer side of the cylindrical pin type spherical hinge, an arc-shaped groove track corresponding to the three synchronous cylindrical pins is arranged on the inner wall of the cylinder body, the synchronous cylindrical pins are located in the arc-shaped groove track, the spindle drives the cylindrical pin type spherical hinge to rotate, torque is transmitted through cooperation of the synchronous cylindrical pins and the arc-shaped groove track, and the cylinder body is driven to rotate.

The spherical hinge is a three-pivot type spherical hinge, three pivots are fixed on the outer side face of the three-pivot type spherical hinge, spherical rollers are mounted on the three pivots, groove-shaped tracks corresponding to the spherical rollers are arranged on the inner wall of the cylinder body II, the spherical rollers are located in the groove-shaped tracks, the spindle drives the three-pivot type spherical hinge to rotate, torque is transmitted through the cooperation of the spherical rollers and the groove-shaped tracks, and the cylinder body is driven to rotate.

The spherical hinge is a curved surface groove rolling way type spherical hinge, a plurality of curved surface grooves are formed in the outer side face of the curved surface groove rolling way type spherical hinge, a retainer is sleeved on the outer side of the curved surface groove rolling way type spherical hinge, corresponding waist-shaped through holes are formed in the retainer, balls are arranged in the curved surface grooves of the curved surface groove rolling way type spherical hinge and the waist-shaped through holes of the retainer, a plurality of curved surface rolling ways corresponding to the balls are formed in the three inner walls of the cylinder body, the balls are located in the curved surface rolling ways, the main shaft drives the curved surface groove rolling way type spherical hinge to rotate, torque is transmitted through the cooperation of the balls and the curved surface rolling ways, and the cylinder body is driven to rotate.

The ball hinge is a linear groove raceway type ball hinge, a plurality of linear grooves are formed in the outer side face of the linear groove raceway type ball hinge, a retainer is sleeved on the outer side of the linear groove raceway type ball hinge, corresponding waist-shaped through holes are formed in the retainer, balls are arranged in the linear grooves of the linear groove raceway type ball hinge and the waist-shaped through holes of the retainer, a plurality of linear raceways corresponding to the balls are arranged on the four inner walls of the cylinder body, the balls are located in the linear raceways, the spindle drives the linear groove raceway type ball hinge to rotate, torque is transmitted through the cooperation of the balls and the linear raceways, and the cylinder body is driven to rotate.

The main shaft and the turntable are integrally formed, an annular groove I is formed in the end face, close to the turntable I, of the spherical hinge, a limiting disc I is connected to the main shaft through a spline, the outer portion of the limiting disc I is stepped, one end, small in outer diameter, of the limiting disc I is located in the annular groove I of the spherical hinge, a central spring is connected between one end, large in outer diameter, of the limiting disc I and the end face of the spherical hinge, and a tool retracting groove is formed in the position, close to the limiting disc, of the main shaft.

The cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove raceway type spherical hinge and the linear groove raceway type spherical hinge are connected with the main shaft through a spline;

The cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove rolling way type spherical hinge and the outer side surface of the linear groove rolling way type spherical hinge are spherical surfaces or partial spherical surfaces, the corresponding middle through holes of the first cylinder body, the second cylinder body, the third cylinder body and the fourth cylinder body comprise a section of spherical surface, and the outer side spherical surfaces of the cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove rolling way type spherical hinge and the linear groove rolling way type spherical hinge are in matched contact with the spherical surfaces of the corresponding middle through holes of the first cylinder body, the second cylinder body, the third cylinder body and the fourth cylinder body.

Under the condition that the main shaft and the spherical hinge are integrally formed, a plurality of long cylindrical pins are arranged on the outer side surface of the spherical hinge, a linear groove track corresponding to the long cylindrical pins is arranged on the inner wall of the five middle through holes of the corresponding cylinder body, the other end of the long cylindrical pin is positioned in the linear groove track, and when the spherical hinge integrated with the main shaft rotates, torque is transmitted through the cooperation of the long cylindrical pins and the linear groove track, so that the cylinder body is driven to rotate; the inner walls of the five middle through holes of the cylinder body are cylindrical surfaces and do not contain spherical surfaces;

The five bottoms of cylinder body open there is annular groove two install spacing dish two, center spring and fixed disk in proper order in the annular groove two, fixed disk and cylinder body fixed connection, spacing dish outer diameter is less than annular groove two, the interior sphere of spacing dish two cooperatees with the sphere of spherical hinge, outside is echelonment, center spring installs in the outside of spacing dish two, and is restricted by the fixed disk.

Pressing plates are respectively fixed on two side surfaces of the rotary table, through holes corresponding to the ball sockets one by one are formed in the pressing plates, and the through holes are matched with the outer surfaces of the plunger ball heads of the thin rods, so that the plunger ball heads of the thin rods are hinged to the ball sockets of the rotary table.

When the main shaft and the spherical hinge are integrally formed, the pressing plate is split, and the pressing plate is formed by two semicircular pressing plates;

When the main shaft and the spherical hinge are integrally formed, the main shaft is split, and the split main shafts are respectively arranged at two sides of the turntable.

Compared with the traditional axial plunger pump, the floating cup pump and the floating swash plate type axial plunger pump designed before, the floating swash plate type axial plunger pump with the symmetrical inclined rotating assembly provided by the utility model has the following novel structure and technical advantages:

1. according to the utility model, two sets of rotating assemblies are respectively and axially symmetrically arranged at two ends in a pump cavity, oil suction and oil discharge of the two sets of rotating assemblies are respectively realized through an oil suction runner and an oil discharge runner in a designed pump body, namely an oil inlet runner and an oil outlet runner are arranged in the pump body, two ends of the oil inlet runner are respectively communicated with oil suction waist-shaped through holes of a valve plate at two sides, and two ends of the oil outlet runner are respectively communicated with oil discharge waist-shaped through holes of the valve plate at two sides;

2. The number of the plungers is obviously increased, which is twice more than that of the traditional axial plunger pump and the previous floating swash plate axial plunger pump, and is 2 more than that of the traditional floating cup pump, so that the flow pulsation, the pressure pulsation and the vibration noise of the pump can be obviously reduced;

3. compared with the traditional axial plunger pump and the floating cup pump, the utility model has the advantages that as the two ends of the thin rod plunger in the utility model are the turntable and the cylinder body which keep complete constant-speed synchronous rotation with the main shaft at any time, the cylinder body is not required to be driven by the torque transmitted by the plunger, the side surface of the plunger can not be contacted with a cylinder hole, the thin rod plunger is designed, and thus, the plunger pair basically has no side force and friction force at any time;

4. The plungers are axially symmetrically arranged, and the axial force generated by the oil pressure of the plunger cavity can be completely counteracted in the pump cavity; the axial force of the traditional axial plunger pump and the floating swash plate type axial plunger pump designed before can not be counteracted, but is transmitted to the shell through the swash plate, and finally is born by the screws on the flange of the fixed pump;

5. The utility model designs a floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies, wherein the plunger is a thin rod plunger, the thin rod plunger is hinged on a turntable of a main shaft through a plunger ball head, namely, the thin rod plunger has the degree of freedom of swinging motion relative to the main shaft, and the cylinder body is an integral cylinder body, so that the problem of friction force between a floating cup body and a split cylinder body in the existing floating cup pump is solved;

6. Compared with the traditional axial plunger pump and the floating swash plate type axial plunger pump designed before, the variable control is more complicated and is equivalent to a floating cup pump. In a relatively preferred embodiment, the floating swash plate type axial piston pump with the symmetrical inclined rotary assembly of the present utility model is preferably used as a constant displacement pump, and the floating swash plate type axial piston pump disclosed in the prior patent is preferably used as a variable displacement pump.

Drawings

FIG. 1 is a cross-sectional view of a middle portion of a first embodiment of the present utility model;

FIG. 2 is a front side sectional view of a first embodiment of the present utility model;

FIG. 3 is a schematic diagram illustrating an internal structure of a first embodiment of the present utility model;

Fig. 4 is a schematic view of a spindle and a turntable according to a first embodiment of the present utility model

FIG. 5 is a schematic view of a spindle, ball joint, and cylinder mounting structure according to an embodiment of the present utility model; (fig. 5a is a cylindrical pin type spherical hinge cross-sectional view, fig. 5b is a three-pivot type spherical hinge cross-sectional view, fig. 5c is a curved surface groove raceway type spherical hinge cross-sectional view, fig. 5d is a linear groove raceway type spherical hinge cross-sectional view, fig. 5e is a cylindrical pin type spherical hinge overall appearance, fig. 5f is a three-pivot type spherical hinge overall appearance, fig. 5g is a curved surface groove raceway type spherical hinge overall appearance, and fig. 5h is a linear groove raceway type spherical hinge overall appearance).

FIG. 6 is a schematic view of a platen structure according to an embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of the port plate of the present utility model;

FIG. 8 is a front view of a port plate of the present utility model;

FIG. 9 is a schematic diagram of a limiting plate according to an embodiment of the present utility model;

FIG. 10 is a schematic diagram of the oil hole port structure of the cylinder body according to the present utility model;

FIG. 11 is a schematic view of a cylindrical pin type spherical hinge body of a spindle turntable according to an embodiment of the present utility model;

FIG. 12 is a schematic view of a cylinder and ball hinge structure according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a second structure of a second limiting plate according to the embodiment of the present utility model;

FIG. 14 is an exploded view of a second spacing plate and cylinder assembly according to the second embodiment of the present utility model;

FIG. 15 is a schematic view illustrating the installation of a spindle and a platen according to a second embodiment of the present utility model, wherein the platen is split;

FIG. 16 is a schematic view of a spindle and platen assembly in accordance with a second embodiment of the present utility model, the spindle being split;

Fig. 17 is a schematic diagram of a cylindrical pin type spherical hinge body with a split spindle according to an embodiment of the present utility model.

Reference numerals in the drawings:

1 main shaft, 2 turntables, 3 shaft seals, 4 bearings, 5 valve plates, 6 spherical hinges, 6.1 cylindrical pin type spherical hinges, 6.2 three-pivot type spherical hinges, 6.3 curved surface groove raceway type spherical hinges, 6.4 linear groove raceway type spherical hinges, 7 cylinders, 7.1 cylinders I, 7.2 cylinders II, 7.3 cylinders III, 7.4 cylinders IV, 7.5 cylinders IV, 8 thin rod plungers, 9 pressing plates, 10.1 limiting plates I, 10.2 limiting plates II, 11 fixed plates, 12 central springs, 13.1 synchronous cylindrical pins, 13.2 spherical rollers, 13.3 balls, 13.4 long cylindrical pins, 13.5 retainers, 14 oil inlets, 15 oil outlets, 16 oil inlets, 17 oil outlets, 18 oil inlets, 19 oil absorption waist type through holes, 20 oil absorption waist type through holes, 21 ball sockets, 22 cylinder holes, 23 tool withdrawal grooves, 24 front pump bodies, 25 rear pump bodies.

Detailed Description

Embodiment one:

The first embodiment discloses a floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies, as shown in fig. 1-4, the floating swash plate type axial plunger pump comprises a front pump body 24, a rear pump body 25 and a main shaft 1 arranged in the front pump body, wherein the front side of the front pump body 24 is a cavity opening of an inner cavity, a shaft seal 3 is arranged in the cavity opening, and the rear side of the front pump body is connected with the rear pump body 25. The inner cavity of the pump is provided with a bearing 4, a valve plate 5, a cylinder body 7, a spherical hinge 6, a first limiting plate 10.1, a rotary table 2, a first limiting plate 10.1, the spherical hinge 6, the cylinder body 7, the valve plate 5 and the bearing 4 in sequence, and the valve plate 2 is used as a center and is in axisymmetric distribution. Wherein: the front pump body 24, the rear pump body 25, the bearing 4, the spherical hinge 6 and the first limiting disc 10.1 are all in the front-back direction, and the front section of the outer ring of the bearing 4 is respectively fixed on the front pump body 24 and the front end of the main shaft 1 and fixedly connected. The central axes of the front pump body 24 and the mounting surface of the valve plate 5 inside the rear pump body 25 form an acute angle with respect to the straight line in the front-rear direction.

The spindle 1 is provided with a rotary table 2 in an integrated form, two sides of the rotary table 2 are symmetrically provided with ball sockets 21 in the same number, two sides of the rotary table 2 on the spindle 1 are respectively connected with ball hinges 6 in a spline manner, corresponding cylinder bodies 7 are sleeved on the corresponding ball hinges 6, one side of each cylinder body 7 close to the rotary table 2 is provided with a plurality of cylinder holes 22, the cylinder holes 22 are in one-to-one correspondence with the ball sockets 21, each cylinder hole 22 is internally provided with a thin rod plunger 8, the end plunger ball heads of the thin rod plungers 8 are hinged with the ball sockets 21, the other ends of the thin rod plungers are placed in the cylinder holes 22, one sides of the two cylinder bodies 7 far away from the rotary table 2 are provided with valve plates 5, the valve plates 5 are fixed on the inner walls of pump bodies, and the valve plates 5 are tightly attached to the cylinder bodies 7 in a sealing manner.

The total number of the slender rod plungers is typically one of 14, 18, 22, 26 and 30, and the slender rod plungers are symmetrically arranged on two sides of the turntable respectively. According to the utility model, 26 slender rod plungers are adopted, 13 slender rod plungers are respectively arranged on two sides of the turntable 2, pump source flow pulsation and pressure pulsation of the pump are greatly reduced, and vibration noise of the pump is effectively reduced.

As shown in fig. 5, when the spherical hinge is a cylindrical pin type spherical hinge 6.1, the spindle 1 is dragged to rotate by the prime mover, the rotating spindle 1 drives the cylindrical pin type spherical hinge 6.1 and the cylinder body 7.1 to synchronously rotate through spline connection, one end of the synchronous cylindrical pin 13.1 is installed on the cylindrical pin type spherical hinge 6.1 and synchronously rotates along with the rotation of the cylindrical pin type spherical hinge 6.1, and the other end of the synchronous cylindrical pin 13.1 is installed in an arc groove track of the cylinder body 7.1, so that the synchronous cylindrical pin 13.1 driven by the cylindrical pin type spherical hinge 6.1 is contacted with the arc groove track of the cylinder body 7.1 and transmits torque, and accordingly the cylinder body 7.1 is driven to synchronously rotate at a quasi-constant speed with the spindle 1.

Fig. 5b shows that when the spherical hinge is a three-pivot spherical hinge 6.2, the spindle 1 is driven to rotate by the prime mover, the rotating spindle 1 drives the three-pivot spherical hinge 6.2 and the cylinder body two 7.2 to synchronously rotate through spline connection, the spherical roller 13.2 movably sleeved on the three-pivot synchronously rotates along with the rotation of the three-pivot spherical hinge 6.2, and the spherical roller 13.2 is embedded into a groove track of the cylinder body two 7.2, so that the spherical surface of the spherical roller 13.2 driven by the three-pivot spherical hinge 6.2 contacts with the groove track of the cylinder body two 7.2 and transmits torque, thereby driving the cylinder body two 7.2 to rotate. When the intersection angle of the main shaft 1 and the central shaft of the cylinder body II 7.2 is not 0, the spherical roller 13.2 can slide along the corresponding groove-shaped track because the spherical roller can move along the pivot axis at the same time, so that the spherical surface of the spherical roller 13.2 is attached to the groove surface of the corresponding groove-shaped track of the cylinder body II 7.2, and a contact bus formed by the spherical roller 13.2 can ensure that the force transmission point of the spherical roller 13.2 is always positioned on the bisector surface of the intersection angle of the central shaft of the main shaft 1 and the central shaft of the cylinder body II 7.2, so that the constant-speed transmission characteristic is realized, and the constant-speed transmission can always ensure that power can be transmitted between the main shaft 1 and the cylinder body II 7.2.

Fig. 5c shows that when the spherical hinge is a curved surface groove raceway type spherical hinge 6.3, the spindle 1 is dragged to rotate by the prime mover, the rotating spindle 1 drives the curved surface groove raceway type spherical hinge 6.3 to synchronously rotate through spline connection, the balls 13.3 clamped in the kidney-shaped through holes of the retainer 13.5 can freely roll between the curved surface grooves on the curved surface groove raceway type spherical hinge 6.3 and the curved surface raceways on the cylinder body three 7.3, when the central axis intersection angle between the cylinder body three 7.3 and the curved surface groove raceway type spherical hinge 6.3 is fixed, the balls 13.3 clamped in the kidney-shaped through holes of the retainer 13.5 are positioned by the cross action of the curved surface grooves on the curved surface groove raceway type spherical hinge 6.3 and the curved surface raceways on the cylinder body three 7.3, and force and moment transmission is performed between the curved surface groove raceway type spherical hinge 6.3 and the cylinder body three 7.3 by the balls 13.3. The retainer 13.5 has an inner spherical surface and an outer spherical surface, the inner spherical surface of the retainer 13.5 is in fit contact with the spherical outer surface of the curved surface groove raceway type spherical hinge 6.3, and the outer spherical surface of the retainer 13.5 is in fit contact with the spherical surface of the cylinder body three 7.3, namely the cylinder body three 7.3 is supported on the curved surface groove raceway type spherical hinge 6.3 through the spherical contact effect and the ball contact effect. The centers of all the balls 13.3 are positioned on the plane of the included angle between the central axes of the curved surface groove raceway type spherical hinge 6.3 and the cylinder body III 7.3, so that the curved surface groove raceway type spherical hinge 6.3 can synchronously drive the cylinder body III 7.3 to rotate at the same speed.

Fig. 5d shows that when the spherical hinge is a linear groove raceway type spherical hinge 6.4, the spindle 1 is dragged to rotate by the prime mover, the rotating spindle 1 drives the linear groove raceway type spherical hinge 6.4 to synchronously rotate through spline connection, the balls 13.3 clamped in the kidney-shaped through holes of the retainer 13.5 can freely roll between the linear grooves on the linear groove raceway type spherical hinge 6.4 and the linear raceways on the cylinder block four 7.4, when the central axis intersection angle between the cylinder block four 7.4 and the linear groove raceway type spherical hinge 6.4 is fixed, the balls 13.3 clamped in the kidney-shaped through holes of the retainer 13.5 are positioned by the cross action of the linear grooves on the linear groove raceway type spherical hinge 6.4 and the linear raceways on the cylinder block four 7.4, and force and moment transmission is performed between the linear groove raceway type spherical hinge 6.4 and the cylinder block four 7.4 by the balls 13.3. The retainer 13.5 has an inner spherical surface and an outer spherical surface, the inner spherical surface of the retainer 13.5 is in fit contact with the spherical outer surface of the linear groove raceway type spherical hinge 6.4, the outer spherical surface of the retainer 13.5 is in fit contact with the spherical surface of the middle through hole of the cylinder four 7.4, namely the cylinder four 7.4 is supported on the linear groove raceway type spherical hinge 6.4 through the spherical contact effect and the ball 13.3 contact effect. The centers of all the balls 13.3 are positioned on the plane of the included angle between the central axes of the linear groove ball-race type spherical hinge 6.4 and the cylinder body IV 7.4, so that the linear groove ball-race type spherical hinge 6.4 can synchronously drive the cylinder body IV 7.4 to rotate at the same speed, and axial displacement is allowed to occur, namely the balls 13.3 can axially roll on the linear groove, and the axial displacement caused by working and installation errors between the linear groove ball-race type spherical hinge 6.4 and the cylinder body IV 7.4 can be compensated.

The cylindrical pin type spherical hinge 6.1, the three-pivot type spherical hinge 6.2, the curved surface groove raceway type spherical hinge 6.3 and the linear groove raceway type spherical hinge 6.4 are connected with the main shaft 1 through splines.

The cylindrical pin type spherical hinge 6.1, the three-pivot type spherical hinge 6.2, the curved surface groove rolling way type spherical hinge 6.3 and the linear groove rolling way type spherical hinge 6.4 are spherical or partially spherical, the corresponding middle through holes of the first cylinder body 7.1, the second cylinder body 7.2, the third cylinder body 7.3 and the fourth cylinder body 7.4 comprise a section of spherical, and the outer spherical surfaces of the cylindrical pin type spherical hinge 6.1, the three-pivot type spherical hinge 6.2, the curved surface groove rolling way type spherical hinge 6.3 and the linear groove rolling way type spherical hinge 6.4 are in fit contact with the spherical surfaces of the corresponding middle through holes of the first cylinder body 7.1, the second cylinder body 7.2, the third cylinder body 7.3 and the fourth cylinder body 7.4.

As shown in fig. 2, 7, 8 and 10, a plurality of oil through holes 18 communicated with cylinder holes 22 are formed in one surface of the cylinder body 7 far away from the rotary disc 2, oil absorption waist-shaped through holes 19 and oil discharge waist-shaped through holes 20 are formed in the valve plate 5, the plurality of oil through holes 18 are communicated with the oil absorption waist-shaped through holes 19 and the oil discharge waist-shaped through holes 20 in the valve plate, an oil inlet 14 and an oil outlet 15 are formed in the pump body, an oil inlet runner 16 and an oil outlet runner 17 are formed in the pump body, two ends of the oil inlet runner 16 are respectively communicated with the oil absorption waist-shaped through holes 19 of the valve plate 5 on two sides, and two ends of the oil outlet runner 17 are respectively communicated with the oil discharge waist-shaped through holes 20 of the valve plate 5 on two sides. The oil of the oil suction waist type through hole 19 is discharged through the oil discharge waist type through hole 20 by the rotation of the cylinder 7. Hydraulic oil of the oil inlet 14 respectively enters the oil suction waist-shaped through holes 19 of the valve plate 5 through the oil inlet flow passages 16, then enters the oil through holes 18 of the cylinder body 7, then enters the cylinder holes 22, low-pressure oil is rotationally compressed through the thin rod plunger 8 to become high-pressure oil, and the high-pressure oil enters the oil outlet flow passages 17 through the oil through holes 18 and the oil discharge waist-shaped through holes 20 of the valve plate 5 and is conveyed out from the oil outlet 15.

As shown in fig. 5 and 9, an annular groove is formed in the end face, close to the turntable 2, of the spherical hinge 6, a first limiting disc 10.1 is connected to the main shaft 1 through a spline, the outer portion of the first limiting disc 10.1 is stepped, one end, with the small outer diameter, of the first limiting disc 10.1 is located in the annular groove of the spherical hinge 6, a rectangular spring 12 is connected between one end, with the large outer diameter, of the first limiting disc 10.1 and the end face of the spherical hinge 6, and a tool withdrawal groove 23 is formed in the main shaft 1, close to the first limiting disc 10.1. The diameter of the tool withdrawal groove 23 is larger than that of the first limiting disc 10.1, so that the first limiting disc 10.1 cannot move rightwards, a central spring 12 is arranged between the first limiting disc 10.1 and the spherical hinge 6, one end of the central spring 12 acts on the first limiting disc 10.1, the other end acts on the spherical hinge 6 and presses the cylinder 7, the cylinder 7 presses the valve plate 5, and initial pretightening force is provided for the valve pair.

As shown in fig. 6, pressing plates 9 are respectively fixed on two side surfaces of the turntable 2, through holes corresponding to the ball sockets 21 one by one are formed in the pressing plates 9, and the through holes are matched with the outer surfaces of the thin rod plungers 8. The pressure plate 9 prevents the plunger ball from falling off, so that the plunger ball of the thin rod plunger 8 is hinged to the ball socket 21 of the turntable 2.

The pressing plate 9 is fixedly connected with the turntable 2 through bolts.

Embodiment two:

As shown in fig. 11-17, a floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies comprises a front pump body 24, a rear pump body 25 and a main shaft 1 arranged in the front pump body, wherein the front side of the front pump body 24 is a cavity opening of an inner cavity, a shaft seal 3 is arranged in the cavity opening, and the rear side of the front pump body is connected with the rear pump body 25. The inner cavity of the pump is provided with a bearing 4, a valve plate 5, a cylinder body 7, a rotary table 2, the cylinder body 7, the valve plate 5 and the bearing 4 in sequence, and the valve plate 2 is used as a center and is in axisymmetric distribution. Wherein: the front pump body 24, the rear pump body 25 and the bearing 4 are all in the front-back direction, and the front section of the outer ring of the bearing 4 is respectively fixed on the front pump body 24 and the front end of the main shaft 1 for fixed connection. The central axes of the front pump body 24 and the mounting surface of the valve plate 5 inside the rear pump body 25 form an acute angle with respect to the straight line in the front-rear direction.

The main shaft 1 and the spherical hinge 6 are integrally formed, the main shaft 1 is dragged to rotate by a prime motor, the rotating main shaft 1 synchronously rotates by driving the long cylindrical pin 13.4, and the other end of the long cylindrical pin 13.4 is arranged in a linear groove type track of the cylinder body five 7.5, so that the driven long cylindrical pin 13.4 contacts with the linear groove type track on the cylinder body five 7.5 and transmits torque, and the cylinder body five 7.5 is driven to synchronously rotate at a quasi-constant speed with the main shaft 1.

As shown in fig. 13-14: an annular groove is formed in the bottom of the cylinder body five 7.5, and a limiting disc two 10.2, a center spring 12 and a fixing disc 11 are sequentially installed. The outer diameter of the second limiting disc 10.2 is smaller than that of the second annular groove, the inner spherical surface of the second limiting disc 10.2 is matched with the spherical hinge 6, and the outer part is stepped. The center spring 12 is arranged outside the limiting plate II 10.2 and limited by the fixing plate 11, the fixing plate 11 is arranged on the inner bottom surface of the cylinder body V7.5 through bolts, and the bolt installation surface is lower than the flow distribution surface. One end of the center spring 12 acts on the limiting disc II 10.2 and acts on the spherical hinge part, and the other end acts on the fixed disc 11 and is transmitted to the cylinder body V7.5, so that the cylinder body V7.5 is pressed towards the valve plate 5, and initial pretightening force is provided for the valve pair.

As shown in fig. 15, when the spindle 1, the turntable 2 and the spherical hinge 6 are integrally formed, the pressing plate 9 is split, and the pressing plate 9 is formed by two semicircular pressing plates.

As shown in fig. 16 and 17, when the spindle 1 and the ball joint 6 are integrally formed, the spindle 1 is split, and the split spindles are respectively mounted on two sides of the turntable 2.

Claims (10)

1. A floating swash plate type axial plunger pump with symmetrical inclined rotating assemblies, characterized in that: the rotary table is characterized by comprising a pump body, wherein a main shaft is arranged in the pump body, a rotary table is arranged on the main shaft, the same number of ball sockets are symmetrically arranged on two side surfaces of the rotary table respectively, ball hinges are respectively connected with two sides of the rotary table in a spline mode or integrally formed on the main shaft, cylinder bodies are arranged on the outer sides of the ball hinges, a plurality of cylinder holes are arranged on one surface, close to the rotary table, of each cylinder body, the cylinder holes are in one-to-one correspondence with the ball sockets, thin rod plungers are arranged in the cylinder holes, end plunger ball heads of the thin rod plungers extend out of the cylinder holes and extend into the ball sockets of the rotary table corresponding to the thin rod plungers, a valve plate is arranged on one side, far away from the rotary table, of each cylinder body, of each valve plate is fixed on the inner wall of the pump body in a certain inclination angle, and the valve plate faces of the valve plates are tightly attached to the bottom surfaces of the cylinder bodies;

The pump body comprises a front pump body and a rear pump body, bearings are arranged among the front pump body, the rear pump body and the main shaft, and a shaft seal is arranged between the front pump body and the main shaft; the number of the thin rod plungers is 26, 13 thin rod plungers are respectively arranged on two sides of the rotary table, and the thin rod plungers are symmetrically arranged on two sides of the rotary table;

The cylinder body is far away from the oil port hole of a plurality of oil through holes communicated with cylinder holes on one side of the rotary table, the valve plate is provided with an oil absorption waist type through hole and an oil discharge waist type through hole, the oil through holes are communicated with the oil absorption waist type through hole and the oil discharge waist type through hole on the valve plate, an oil inlet and an oil outlet are arranged on the pump body, an oil inlet runner and an oil outlet runner are arranged in the pump body, two ends of the oil inlet runner are respectively communicated with the valve plate oil absorption waist type through holes on two sides, and two ends of the oil outlet runner are respectively communicated with the valve plate oil discharge waist type through holes on two sides.

2. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 1, wherein: the cylinder body is characterized in that the spherical hinge is a cylindrical pin type spherical hinge, three synchronous cylindrical pins are fixed on the outer side of the cylindrical pin type spherical hinge, an arc-shaped groove track corresponding to the three synchronous cylindrical pins is arranged on the inner wall of the cylinder body, the synchronous cylindrical pins are located in the arc-shaped groove track, the spindle drives the cylindrical pin type spherical hinge to rotate, torque is transmitted through cooperation of the synchronous cylindrical pins and the arc-shaped groove track, and the cylinder body is driven to rotate.

3. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 2, wherein: the spherical hinge is a three-pivot type spherical hinge, three pivots are fixed on the outer side face of the three-pivot type spherical hinge, spherical rollers are mounted on the three pivots, groove-shaped tracks corresponding to the spherical rollers are arranged on the inner wall of the cylinder body II, the spherical rollers are located in the groove-shaped tracks, the spindle drives the three-pivot type spherical hinge to rotate, torque is transmitted through the cooperation of the spherical rollers and the groove-shaped tracks, and the cylinder body is driven to rotate.

4. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 3, wherein: the spherical hinge is a curved surface groove rolling way type spherical hinge, a plurality of curved surface grooves are formed in the outer side face of the curved surface groove rolling way type spherical hinge, a retainer is sleeved on the outer side of the curved surface groove rolling way type spherical hinge, corresponding waist-shaped through holes are formed in the retainer, balls are arranged in the curved surface grooves of the curved surface groove rolling way type spherical hinge and the waist-shaped through holes of the retainer, a plurality of curved surface rolling ways corresponding to the balls are formed in the three inner walls of the cylinder body, the balls are located in the curved surface rolling ways, the main shaft drives the curved surface groove rolling way type spherical hinge to rotate, torque is transmitted through the cooperation of the balls and the curved surface rolling ways, and the cylinder body is driven to rotate.

5. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 4, wherein: the ball hinge is a linear groove raceway type ball hinge, a plurality of linear grooves are formed in the outer side face of the linear groove raceway type ball hinge, a retainer is sleeved on the outer side of the linear groove raceway type ball hinge, corresponding waist-shaped through holes are formed in the retainer, balls are arranged in the linear grooves of the linear groove raceway type ball hinge and the waist-shaped through holes of the retainer, a plurality of linear raceways corresponding to the balls are arranged on the four inner walls of the cylinder body, the balls are located in the linear raceways, the spindle drives the linear groove raceway type ball hinge to rotate, torque is transmitted through the cooperation of the balls and the linear raceways, and the cylinder body is driven to rotate.

6. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 1, wherein: the main shaft and the turntable are integrally formed, an annular groove I is formed in the end face, close to the turntable I, of the spherical hinge, a limiting disc I is connected to the main shaft through a spline, the outer portion of the limiting disc I is stepped, one end, small in outer diameter, of the limiting disc I is located in the annular groove I of the spherical hinge, a central spring is connected between one end, large in outer diameter, of the limiting disc I and the end face of the spherical hinge, and a tool retracting groove is formed in the position, close to the limiting disc, of the main shaft.

7. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 5, wherein: the cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove raceway type spherical hinge and the linear groove raceway type spherical hinge are connected with the main shaft through a spline;

The cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove rolling way type spherical hinge and the outer side surface of the linear groove rolling way type spherical hinge are spherical surfaces or partial spherical surfaces, the corresponding middle through holes of the first cylinder body, the second cylinder body, the third cylinder body and the fourth cylinder body comprise a section of spherical surface, and the outer side spherical surfaces of the cylindrical pin type spherical hinge, the three-pivot type spherical hinge, the curved surface groove rolling way type spherical hinge and the linear groove rolling way type spherical hinge are in matched contact with the spherical surfaces of the corresponding middle through holes of the first cylinder body, the second cylinder body, the third cylinder body and the fourth cylinder body.

8. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 1, wherein: under the condition that the main shaft and the spherical hinge are integrally formed, a plurality of long cylindrical pins are arranged on the outer side surface of the spherical hinge, a linear groove track corresponding to the long cylindrical pins is arranged on the inner wall of the five middle through holes of the corresponding cylinder body, the other end of the long cylindrical pin is positioned in the linear groove track, and when the spherical hinge integrated with the main shaft rotates, torque is transmitted through the cooperation of the long cylindrical pins and the linear groove track, so that the cylinder body is driven to rotate; the inner walls of the five middle through holes of the cylinder body are cylindrical surfaces and do not contain spherical surfaces;

The five bottoms of cylinder body open there is annular groove two install spacing dish two, center spring and fixed disk in proper order in the annular groove two, fixed disk and cylinder body fixed connection, spacing dish outer diameter is less than annular groove two, the interior sphere of spacing dish two cooperatees with the sphere of spherical hinge, outside is echelonment, center spring installs in the outside of spacing dish two, and is restricted by the fixed disk.

9. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 1, wherein: pressing plates are respectively fixed on two side surfaces of the rotary table, through holes corresponding to the ball sockets one by one are formed in the pressing plates, and the through holes are matched with the outer surfaces of the plunger ball heads of the thin rods, so that the plunger ball heads of the thin rods are hinged to the ball sockets of the rotary table.

10. A floating swash plate type axial plunger pump with a symmetrical inclined rotating assembly according to claim 9, wherein: when the main shaft and the spherical hinge are integrally formed, the pressing plate is split, and the pressing plate is formed by two semicircular pressing plates;

When the main shaft and the spherical hinge are integrally formed, the main shaft is split, and the split main shafts are respectively arranged at two sides of the turntable.