阅读说明：本技术 一种基于液磁复合支撑的端面配流轴向柱塞泵 (End face flow distribution axial plunger pump based on liquid-magnetic composite support ) 是由 姜继海 杜博然 于 2021-09-22 设计创作，主要内容包括：一种基于液磁复合支撑的端面配流轴向柱塞泵,它涉及液压技术中的液压元件领域。本发明解决了现有端面配流轴向柱塞泵存在配流副偏磨的问题。本发明的定磁组件安装在泵壳上,转磁组件安装在缸体上,环形铁芯的轴向磁极面与轴向定子的轴向磁极面位置相对应,轴向定子在z向对缸体产生磁吸力,且轴向定子与环形铁芯之间有磁极间隙d,环形铁芯的径向磁极面与径向定子的径向磁极面位置相对应,径向定子在xy平面对缸体产生磁吸力,且环形铁芯与径向定子之间有磁极间隙b,永磁体、轴向定子、磁极间隙d、环形铁芯、磁极间隙b和径向定子共同构成一个完整磁回路。本发明用于最大程度降低配流盘表面的偏磨,减少轴向柱塞泵的功率损失并提高其使用寿命。(An end face flow distribution axial plunger pump based on a liquid magnetic composite support relates to the field of hydraulic elements in the hydraulic technology. The invention solves the problem of eccentric wear of the flow distribution pair of the existing end face flow distribution axial plunger pump. The permanent magnet assembly is arranged on a pump shell, the rotating magnet assembly is arranged on a cylinder body, an axial magnetic pole surface of an annular iron core corresponds to the axial magnetic pole surface of an axial stator, the axial stator generates magnetic attraction to the cylinder body in the z direction, a magnetic pole gap d is formed between the axial stator and the annular iron core, a radial magnetic pole surface of the annular iron core corresponds to the radial magnetic pole surface of a radial stator, the radial stator generates magnetic attraction to the cylinder body in the xy plane, a magnetic pole gap b is formed between the annular iron core and the radial stator, and the permanent magnet, the axial stator, the magnetic pole gap d, the annular iron core, the magnetic pole gap b and the radial stator form a complete magnetic loop together. The invention is used for reducing the eccentric wear of the surface of the valve plate to the maximum extent, reducing the power loss of the axial plunger pump and prolonging the service life of the axial plunger pump.)

1. The utility model provides an end face flow distribution axial plunger pump based on liquid magnetism composite support which characterized in that: the magnetic circuit and the magnetism isolating and positioning assembly comprise a fixed magnetic assembly and a rotating magnetic assembly, the fixed magnetic assembly is arranged on the pump shell, the rotating magnetic assembly is arranged on the cylinder body (16), the fixed magnetic assembly and the rotating magnetic assembly are arranged oppositely, and a circular flange is arranged on the cylindrical surface of the cylinder body (16);

the fixed magnetic assembly comprises a magnetic isolation gasket (20), an iron core pressing plate (22), an annular iron core (23) and a plurality of first connecting pieces (21), the magnetic isolation gasket (20), the iron core pressing plate (22) and the annular iron core (23) are all in a circular ring structure, the iron core pressing plate (22) installs the annular iron core (23) on a circular ring-shaped flange of the cylinder body (16) through the plurality of first connecting pieces (21), and the magnetic isolation gasket (20) is arranged between the annular iron core (23) and the circular ring-shaped flange of the cylinder body (16);

the pump shell is a sectional type pump shell, the sectional type pump shell comprises a front pump shell (4), a magnetism isolating outer shell (9), magnetism isolating cushion blocks (14), a rear pump shell (15), a plurality of second connecting pieces (24) and a plurality of third connecting pieces (29), the front pump shell (4), the magnetism isolating outer shell (9), the magnetism isolating cushion blocks (14) and the rear pump shell (15) are sequentially and coaxially arranged from left to right along the z direction, the front end of the magnetism isolating outer shell (9) is connected with the front pump shell (4) through the second connecting pieces (24), the rear end of the magnetism isolating outer shell (9) and the magnetism isolating cushion blocks (14) are connected with the rear pump shell (15) through the third connecting pieces (29), the magnetism isolating outer shell (9) and the magnetism isolating cushion blocks (14) are of a circular ring structure, and an annular accommodating groove is formed in the circumferential direction on the end face, close to one side of a circular flange of a cylinder body (16), of the magnetism isolating outer shell (9);

the rotating magnetic assembly comprises a permanent magnet (11), a radial stator (12), a magnetism isolating ring (25), an axial stator (26) and a magnetism isolating body (28), wherein the magnetism isolating ring (25), the axial stator (26), the permanent magnet (11), the radial stator (12) and the magnetism isolating body (28) are of semicircular ring structures, the axial stator (26), the permanent magnet (11) and the radial stator (12) are sequentially and coaxially arranged in an annular accommodating groove of a magnetism isolating shell (9) from left to right along the z direction, the magnetism isolating ring (25) is arranged between the permanent magnet (11) and the axial stator (26), the magnetism isolating body (28) is arranged in the annular accommodating groove of the magnetism isolating shell (9), and the end face of the magnetism isolating body (28) in the y direction is respectively matched with the end faces of the axial stator (26), the permanent magnet (11), the magnetism isolating ring (25) and the radial stator (12) in the y direction;

the axial magnetic pole face of annular iron core (23) corresponds to the axial magnetic pole face position of axial stator (26), axial stator (26) produces magnetic attraction to cylinder body (16) in the z direction, and there is magnetic pole clearance d between axial stator (26) and annular iron core (23), the radial magnetic pole face of annular iron core (23) corresponds to the radial magnetic pole face position of radial stator (12), radial stator (12) produces magnetic attraction to cylinder body (16) in the xy plane, and there is magnetic pole clearance b between annular iron core (23) and radial stator (12), permanent magnet (11), axial stator (26), magnetic pole clearance d, annular iron core (23), magnetic pole clearance b and radial stator (12) constitute a complete magnetic circuit jointly.

2. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the pump also comprises a shaft end seal (1), a pump shaft (2), a front bearing (3), a swash plate (5), a return plate (7), a flow distribution plate (17), a central spring (18), a rear bearing (19), a plurality of sliding shoes (6) and a plurality of plungers (8), wherein the shaft end seal (1) is arranged between a front pump shell (4) and the pump shaft (2) of the shell, the front end of the pump shaft (2) is positioned through the front bearing (3), the rear end of the pump shaft (2) is positioned through the rear bearing (19), the pump shaft (2) is driven to have rotary motion along a z axis, a cylinder body (16) is connected with the pump shaft (2) through a spline, the flow distribution plate (17) is fixedly arranged on a rear pump shell (15) of the shell, the end face of the cylinder body (16) is tightly attached to the flow distribution plate (17) under the action of the central spring (18), a liquid films a exist between the flow distribution plate (17) and the cylinder body (16), and liquid films (8) which are uniformly arranged around the z axis along the circumferential direction are arranged in a hole of the cylinder body (16), the ball head of the plunger (8) is pressed into the sliding shoe (6) to form a plunger-sliding shoe assembly, and the pump shaft (2) presses the plunger-sliding shoe assembly on the swash plate (5) through the return disc (7) under the action of the central spring (18).

3. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the rotating magnetic assembly further comprises a pre-tightening gasket (27) and a plurality of pre-tightening springs (10), a plurality of cylindrical blind holes are formed in the bottom surface of the inner portion of the annular accommodating groove of the magnetism isolating shell (9) along the circumferential direction, the pre-tightening springs (10) are respectively inserted into the cylindrical blind holes of the magnetism isolating shell (9), the pre-tightening gasket (27) is of a circular ring structure, the pre-tightening gasket (27) is arranged between the pre-tightening springs (10) and the axial stator (26) and the magnetism isolating body (28), the axial stator (26), the permanent magnet (11) and the radial stator (12) are tightly arranged in the z direction through the pre-tightening gasket (27) under the action of the pre-tightening springs (10), and the magnetism isolating body (28) is tightly attached to the magnetism isolating cushion block (14) through the pre-tightening gasket (27) under the action of the pre-tightening springs (10). Without the use of a pre-tensioned spring, the gap between the axial stator 26, the permanent magnet 11 and the radial stator 12 would have a loss of flux density between the gap b and the gap d.

4. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the rotating magnetic assembly further comprises a plurality of pins (13), pin holes matched with the pins (13) are formed in the matching surfaces of the radial stator (12) and the magnetism isolating cushion block (14) along the circumferential direction, and the plurality of pins (13) are respectively installed between the radial stator (12) and the magnetism isolating cushion block (14). If circumferential positioning is not performed by using a plurality of pins (13), the phase of the magnetic pole surface cannot be fixed, and the magnetic force output at a predetermined position of the toroidal core (23) cannot be ensured.

5. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the gap b and the gap d should be kept uniform.

6. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the magnetism isolating shell (9), the pre-tightening gasket (27), the magnetism isolating cushion block (14), the magnetism isolating ring (25), the magnetism isolating gasket (20), the iron core pressing plate (22) and the magnetism isolating body (28) are made of aluminum materials.

7. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the axial stator (26), the radial stator (12) and the annular iron core (23) are laminated by adopting electrical pure iron or silicon steel sheets.

8. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the axial stator (26), the magnetism isolating ring (25) and the magnetism isolating body (28) are semicircular rings with L-shaped sections; the permanent magnet (11) and the radial stator (12) are semicircular rings with rectangular sections; the annular iron core (23) and the iron core pressure plate (22) are circular rings with L-shaped sections.

9. The end-face flow distribution axial plunger pump based on the hydromagnetic composite support is characterized in that: the first connecting piece (21), the second connecting piece (24) and the third connecting piece (29) are all screws.

Technical Field

The invention relates to the field of hydraulic elements in the hydraulic technology, in particular to an end face flow distribution axial plunger pump based on a liquid magnetic composite support.

Background

The friction pair is a key part in the axial plunger pump, wherein the flow distribution pair is a part with the highest failure rate in the axial plunger pump, and a liquid film of the flow distribution pair has a lubricating effect and also has a supporting effect on a cylinder body, so that the design of force balance of the cylinder body has a vital effect on the lubricating property of the flow distribution pair. At present, the design of a flow distribution pair mainly adopts a residual compaction force method, and the liquid film support reaction force is balanced by utilizing the central spring force and the compaction force of high-pressure oil in a cylinder hole on a cylinder together. According to the working principle, the surface of the port plate is bound to generate a contact torque which can be balanced only by the material, so that the eccentric wear of the surface of the port pair is caused, and the phenomenon is more serious in an axial plunger pump using a low-viscosity medium.

The liquid film pressure of the existing axial plunger pump is not formed in the starting and stopping stage, the pretightening force and the pressing force acting on the valve plate are born by the surface stress of the material to a large extent, and the alternating load of the high-low pressure flow distribution area inevitably causes the eccentric wear of the valve plate, so that the wear consumption of the surface material of the valve plate is increased, the leakage is increased besides large mechanical loss after long-time operation, and the integral performance of the plunger pump is directly influenced. The condition that the inherent load of counter surface is uneven needs to be solved urgently, improves traditional axial plunger pump cylinder physical power balanced relation, stops the stage at the pump and provides some holding power for the cylinder body, compensates liquid film holding power and moment, and the contact stress and moment of counter surface because of liquid film counter-force is not enough and the uneven production of load are balanced to the counter surface under the balanced design operating mode simultaneously. The novel force balance method applied to the flow distribution pair of the axial plunger pump is provided, the supporting capacity of a high-pressure liquid film is improved, the power loss at the flow distribution pair is reduced, and the method is one of the current important research directions.

The prior research mainly adopts a method for the eccentric wear of the flow distribution pair, namely designing an auxiliary supporting belt, but the auxiliary supporting belt introduces a new pair of friction pairs, so that a part of mechanical efficiency is lost. The magnetic force is widely applied to the magnetic bearing at present due to no contact force, wherein the permanent magnetic force is mainly used for making up the problem that the liquid film force is insufficient when the liquid film bearing is started and stopped, and a very good effect is achieved. The magnetic force of the electromagnet is determined by the ampere-turns, if the electromagnetic force is applied to the liquid-magnetic composite support, the energy consumption is large, the whole structure occupies a large space, and moreover, the complex power supply equipment obviously lacks practical application value for the axial plunger pump with a small and compact structure.

In summary, the existing end face flow distribution axial plunger pump has the problem of eccentric wear of a flow distribution pair.

Disclosure of Invention

The invention aims to solve the problem that an existing end face flow distribution axial plunger pump is eccentric in a flow distribution pair, and further provides an end face flow distribution axial plunger pump based on a liquid magnetic composite support.

The technical scheme of the invention is as follows:

an end face flow distribution axial plunger pump based on liquid magnetic composite support comprises a pump shell, a cylinder body 16, a magnetic circuit and a magnetism isolating and positioning assembly, wherein the magnetic circuit and magnetism isolating and positioning assembly comprises a fixed magnetic assembly and a rotating magnetic assembly, the fixed magnetic assembly is installed on the pump shell, the rotating magnetic assembly is installed on the cylinder body 16, the fixed magnetic assembly and the rotating magnetic assembly are arranged oppositely, and a circular flange is arranged on the cylindrical surface of the cylinder body 16;

the fixed magnetic assembly comprises a magnetic isolation gasket 20, an iron core pressing plate 22, an annular iron core 23 and a plurality of first connecting pieces 21, the magnetic isolation gasket 20, the iron core pressing plate 22 and the annular iron core 23 are all of a circular ring structure, the iron core pressing plate 22 installs the annular iron core 23 on a circular flange of the cylinder body 16 through the plurality of first connecting pieces 21, and the magnetic isolation gasket 20 is arranged between the annular iron core 23 and the circular flange of the cylinder body 16;

the pump shell is a sectional type pump shell, the sectional type pump shell comprises a front pump shell 4, a magnetism isolating shell 9, magnetism isolating cushion blocks 14, a rear pump shell 15, a plurality of second connecting pieces 24 and a plurality of third connecting pieces 29, the front pump shell 4, the magnetism isolating shell 9, the magnetism isolating cushion blocks 14 and the rear pump shell 15 are sequentially and coaxially arranged from left to right along the z direction, the front end of the magnetism isolating shell 9 is connected with the front pump shell 4 through the second connecting pieces 24, the rear end of the magnetism isolating shell 9 and the magnetism isolating cushion blocks 14 are connected with the rear pump shell 15 through the third connecting pieces 29, the magnetism isolating shell 9 and the magnetism isolating cushion blocks 14 are both in a circular ring structure, and an annular accommodating groove is formed in the circumferential direction on the end face of one side, close to a circular ring-shaped flange of a cylinder body 16, of the magnetism isolating shell 9;

the rotating magnetic assembly comprises a permanent magnet 11, a radial stator 12, a magnetism isolating ring 25, an axial stator 26 and a magnetism isolating body 28, wherein the magnetism isolating ring 25, the axial stator 26, the permanent magnet 11, the radial stator 12 and the magnetism isolating body 28 are all of a semicircular ring structure, the axial stator 26, the permanent magnet 11 and the radial stator 12 are sequentially and coaxially arranged in an annular accommodating groove of a magnetism isolating shell 9 from left to right along a z direction, the magnetism isolating ring 25 is arranged between the permanent magnet 11 and the axial stator 26, the magnetism isolating body 28 is arranged in the annular accommodating groove of the magnetism isolating shell 9, and the end face of the magnetism isolating body 28 in the y direction is respectively matched with the end faces of the axial stator 26, the permanent magnet 11, the magnetism isolating ring 25 and the radial stator 12 in the y direction;

the axial magnetic pole face of the annular iron core 23 corresponds to the axial magnetic pole face of the axial stator 26, the axial stator 26 generates magnetic attraction force on the cylinder body 16 in the z direction, a magnetic pole gap d is formed between the axial stator 26 and the annular iron core 23, the radial magnetic pole face of the annular iron core 23 corresponds to the radial magnetic pole face of the radial stator 12, the radial stator 12 generates magnetic attraction force on the cylinder body 16 in the xy plane, a magnetic pole gap b is formed between the annular iron core 23 and the radial stator 12, and the permanent magnet 11, the axial stator 26, the magnetic pole gap d, the annular iron core 23, the magnetic pole gap b and the radial stator 12 jointly form a complete magnetic loop.

Compared with the prior art, the invention has the following effects:

1. the initial pre-tightening force applied to the surface of the port plate 17 by the cylinder body 16 of the end face flow distribution axial plunger pump based on the liquid-magnetic composite support is realized after the magnetic attraction force applied to the annular iron core 23 by the axial stator 26 and the compression force applied to the cylinder body 16 by the central spring 18 are offset.

2. The magnetic attraction force applied to the cylinder body 16 by the axial stator 26 of the end-face flow distribution axial plunger pump based on the liquid-magnetic composite support, the compression force applied to the cylinder body 16 by the central spring 18 and the pressing force generated to the cylinder body 16 by the high-pressure liquid in the hole of the cylinder body 16 jointly counteract the supporting reaction force of the liquid film a, so that the force balance of the cylinder body 16 in the z-axis direction is realized; the stress of the cylinder 16 on the x and y axes is balanced by the pump shaft 2; the supporting and counter moment generated by the liquid film a on the xy plane to the cylinder body 16 is balanced by the magnetic attraction moment generated by the axial stator 26 to the cylinder body 16 and the pressing moment generated by the high-pressure liquid in the hole of the cylinder body 16 to the cylinder body 16; the magnetic attraction moment generated by the axial stator 26 on the cylinder body 16 can balance the support and counter moment generated by the contact stress on the surface of the port plate 17.

3. According to the end face flow distribution axial plunger pump based on the liquid-magnetic composite support, a magnetic loop is designed in the pump, the axial stator 26 utilizes the magnetic pole gap d to generate magnetic attraction and magnetic torque to act on the cylinder body 16, a part of supporting effect can be provided for the cylinder body 16 in the starting and stopping stage of the pump or when the pressure of a liquid film a is low, the contact stress and the torque of the cylinder body 16 acting on the surface of the flow distribution plate 17 are balanced according to the actual position of eccentric wear of the flow distribution plate 17 under the design working condition, the eccentric wear of the surface of the flow distribution plate 17 is reduced to the maximum extent, the power loss of the axial plunger pump is reduced, and the service life of the axial plunger pump is prolonged.

Drawings

FIG. 1 is a schematic structural diagram of an end face flow distribution axial plunger pump based on a hydromagnetic composite support;

FIG. 2 is an enlarged view of a portion of FIG. 1 at c;

FIG. 3 is a schematic view of the flanged cylinder 16 in the z-direction;

FIG. 4 is a cross-sectional view of FIG. 1 at A-A;

fig. 5 is a schematic view of the structure of the isolation magnet 28 along the y direction.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the end face flow distribution axial plunger pump based on the liquid magnetic composite support of the embodiment comprises a pump shell, a cylinder body 16, a magnetic circuit and a magnetism isolating and positioning assembly, wherein the magnetic circuit and the magnetism isolating and positioning assembly comprise a fixed magnetic assembly and a rotating magnetic assembly, the fixed magnetic assembly is installed on the pump shell, the rotating magnetic assembly is installed on the cylinder body 16, the fixed magnetic assembly and the rotating magnetic assembly are oppositely arranged, and a circular flange is arranged on the cylindrical surface of the cylinder body 16;

the fixed magnetic assembly comprises a magnetic isolation gasket 20, an iron core pressing plate 22, an annular iron core 23 and a plurality of first connecting pieces 21, the magnetic isolation gasket 20, the iron core pressing plate 22 and the annular iron core 23 are all of a circular ring structure, the iron core pressing plate 22 installs the annular iron core 23 on a circular flange of the cylinder body 16 through the plurality of first connecting pieces 21, and the magnetic isolation gasket 20 is arranged between the annular iron core 23 and the circular flange of the cylinder body 16;

the pump shell is a sectional type pump shell, the sectional type pump shell comprises a front pump shell 4, a magnetism isolating shell 9, magnetism isolating cushion blocks 14, a rear pump shell 15, a plurality of second connecting pieces 24 and a plurality of third connecting pieces 29, the front pump shell 4, the magnetism isolating shell 9, the magnetism isolating cushion blocks 14 and the rear pump shell 15 are sequentially and coaxially arranged from left to right along the z direction, the front end of the magnetism isolating shell 9 is connected with the front pump shell 4 through the second connecting pieces 24, the rear end of the magnetism isolating shell 9 and the magnetism isolating cushion blocks 14 are connected with the rear pump shell 15 through the third connecting pieces 29, the magnetism isolating shell 9 and the magnetism isolating cushion blocks 14 are both in a circular ring structure, and an annular accommodating groove is formed in the circumferential direction on the end face of one side, close to a circular ring-shaped flange of a cylinder body 16, of the magnetism isolating shell 9;

the rotating magnetic assembly comprises a permanent magnet 11, a radial stator 12, a magnetism isolating ring 25, an axial stator 26 and a magnetism isolating body 28, wherein the magnetism isolating ring 25, the axial stator 26, the permanent magnet 11, the radial stator 12 and the magnetism isolating body 28 are all of a semicircular ring structure, the axial stator 26, the permanent magnet 11 and the radial stator 12 are sequentially and coaxially arranged in an annular accommodating groove of a magnetism isolating shell 9 from left to right along a z direction, the magnetism isolating ring 25 is arranged between the permanent magnet 11 and the axial stator 26, the magnetism isolating body 28 is arranged in the annular accommodating groove of the magnetism isolating shell 9, and the end face of the magnetism isolating body 28 in the y direction is respectively matched with the end faces of the axial stator 26, the permanent magnet 11, the magnetism isolating ring 25 and the radial stator 12 in the y direction;

the axial magnetic pole face of the annular iron core 23 corresponds to the axial magnetic pole face of the axial stator 26, the axial stator 26 generates magnetic attraction force on the cylinder body 16 in the z direction, a magnetic pole gap d is formed between the axial stator 26 and the annular iron core 23, the radial magnetic pole face of the annular iron core 23 corresponds to the radial magnetic pole face of the radial stator 12, the radial stator 12 generates magnetic attraction force on the cylinder body 16 in the xy plane, a magnetic pole gap b is formed between the annular iron core 23 and the radial stator 12, and the permanent magnet 11, the axial stator 26, the magnetic pole gap d, the annular iron core 23, the magnetic pole gap b and the radial stator 12 jointly form a complete magnetic loop.

In the present embodiment, magnetic isolation materials are installed between the axial stator 26, the permanent magnet 11, and the radial stator 12 and the external environment, magnetic isolation materials are installed between the axial stator 26 and the front pump housing 4, magnetic isolation materials are installed between the radial stator 12 and the rear pump housing 15, and magnetic isolation materials are installed between the axial stator 26 and the annular iron core 23, and the cylinder 16. And a magnetism isolating ring 25 is arranged between the permanent magnet 11 and the axial stator 26 and used for avoiding the magnetic induction lines from entering.

The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 5, and further includes a shaft end seal 1, a pump shaft 2, a front bearing 3, a swash plate 5, a return plate 7, a port plate 17, a central spring 18, a rear bearing 19, a plurality of shoes 6 and a plurality of plungers 8, wherein the shaft end seal 1 is installed between a front pump housing 4 and the pump shaft 2 of the housing, the front end of the pump shaft 2 is positioned by the front bearing 3, the rear end of the pump shaft 2 is positioned by the rear bearing 19, the pump shaft 2 is driven to have a rotational motion along a z-axis, a cylinder block 16 is connected with the pump shaft 2 by a spline, the port plate 17 is fixedly installed on a rear pump housing 15 of the housing, an end surface of a cylinder block 16 is tightly attached to the port plate 17 under the action of the central spring 18, a liquid film a is present between the port plate 17 and the cylinder block 16, plungers 8 uniformly arranged in a circumferential direction around the z-axis are arranged in holes of the cylinder block 16, a ball head of the plungers 8 is pressed into the shoes 6 to form a plunger-shoe assembly, the pump shaft 2 presses the plunger-slipper assembly against the swashplate 5 via the return disc 7 under the action of the central spring 18. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 5, the rotating magnetic assembly of the embodiment further includes a pre-tightening gasket 27 and a plurality of pre-tightening springs 10, a plurality of cylindrical blind holes are formed in the bottom surface of the interior of the annular accommodating groove of the magnetism isolating housing 9 along the circumferential direction, the plurality of pre-tightening springs 10 are respectively inserted into the plurality of cylindrical blind holes of the magnetism isolating housing 9, the pre-tightening gasket 27 is of a circular ring structure, the pre-tightening gasket 27 is disposed between the pre-tightening springs 10 and the axial stator 26 and the magnetism isolating body 28, the axial stator 26, the permanent magnet 11 and the radial stator 12 are tightly arranged in the z direction through the pre-tightening gasket 27 under the action of the pre-tightening springs 10, and the magnetism isolating body 28 is tightly attached to the magnetism isolating cushion block 14 through the pre-tightening gasket 27 under the action of the pre-tightening springs 10. So set up, the cylinder blind hole is used for leading pretension spring 10, and axial stator 26, permanent magnet 11 and radial stator 12 adopt pretension spring 10 to carry out the pretension. Without the use of a pre-tensioned spring, the gap between the axial stator 26, the permanent magnet 11 and the radial stator 12 would have a loss of flux density between the gap b and the gap d. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 5, the rotating magnetic assembly of the present embodiment further includes a plurality of pins 13, pin holes matched with the pins 13 are formed in the matching surfaces of the radial stator 12 and the magnetism isolating cushion block 14 along the circumferential direction, and the plurality of pins 13 are respectively installed between the radial stator 12 and the magnetism isolating cushion block 14. So arranged, for ensuring the circumferential positioning of the radial stator 12, the axial stator 26, the permanent magnet 11, the magnetism isolating ring 25 and the magnetism isolating body 28. If circumferential positioning is not performed using the plurality of pins 13, the phase of the magnetic pole surface cannot be fixed, and magnetic force output at a predetermined position of the toroidal core 23 cannot be ensured. Other compositions and connection relationships are the same as in the first, second or third embodiment.

The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1 to 5, and the gap b and the gap d of the present embodiment should be kept consistent. By the arrangement, the uniformity of the magnetic circuit is ensured. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: in the present embodiment, the magnetism isolating housing 9, the pre-tightening washer 27, the magnetism isolating pad 14, the magnetism isolating ring 25, the magnetism isolating washer 20, the iron core pressing plate 22, and the magnetism isolating body 28 of the present embodiment are made of aluminum materials. So set up, the aluminum product has magnetism isolating material for avoid magnetism to induce the line to get into the complete magnetic circuit that permanent magnet 11, axial stator 26, magnetic pole clearance d, annular iron core 23, magnetic pole clearance b and radial stator 12 constitute, cause magnetic interference. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: referring to fig. 1 to 5, the axial stator 26, the radial stator 12, and the annular iron core 23 of the present embodiment are made of electrical pure iron or silicon steel sheets by lamination. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The specific implementation mode is eight: in the present embodiment, the axial stator 26, the magnetism isolating ring 25, and the magnetism isolating body 28 are semicircular rings having an L-shaped cross section, which are described with reference to fig. 1 to 5; the permanent magnet 11 and the radial stator 12 are semicircular rings with rectangular sections; the annular iron core 23 and the iron core pressing plate 22 are circular rings with L-shaped sections. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.

The specific implementation method nine: in the present embodiment, which is described with reference to fig. 1 to 5, the first connector 21, the second connector 24, and the third connector 29 of the present embodiment are all screws. So set up, be convenient for dismantlement and installation between the part. Other compositions and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment.

Principle of operation

The working principle of the end-face flow distribution axial plunger pump based on the hydromagnetic composite support is described with reference to fig. 1 to 5:

in the starting and stopping stage of the pump, the liquid film a supporting force is not formed, the axial stator 26 generates magnetic attraction force on the annular iron core 23, and the supporting force of the central spring 18 and the surface contact force of the port plate 17 jointly realize main force balance in the z direction. The magnetic attraction of the radial stator 12 to the annular iron core 23 is balanced by the pump shaft 2. The direction of magnetic attraction generated by the axial stator 26 on the annular iron core 23 is z^-The contact force of the surface of the port plate 17 can be reduced, and the surface friction force of the port plate 17 when the liquid film a is not sufficiently lubricated can be reduced, thereby further reducing the surface abrasion of the port plate 17.

Z generated by axial stator 26 for toroidal core 23 under design conditions^-Directional magnetic attraction force, z-direction pressing force generated by oil in the hole of the cylinder 16 on the cylinder 16, z-direction central spring 18 force and z-direction liquid film generated by liquid film a on the cylinder 16^-The directional supporting forces together achieve a primary force balance in z; the axial stator 26 generates magnetic attraction torque to the annular iron core 23, and the pressing torque generated by oil in the hole of the cylinder 16 to the cylinder 16 and the supporting torque generated by the liquid film a realize x togetherMoment balance in the y plane. The magnetic attraction of the radial stator 12 to the annular iron core 23 is balanced by the pump shaft 2. The axial stator 26 generates magnetic attraction torque on the annular iron core 23, so that contact torque generated by uneven load on the surface of the port plate 17 can be balanced, eccentric wear on the surface of the port plate 17 is reduced to the maximum extent, power loss of the axial plunger pump is reduced, and the service life of the axial plunger pump is prolonged.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.