CN111120241A

CN111120241A - Reciprocating booster pump

Info

Publication number: CN111120241A
Application number: CN201911403098.4A
Authority: CN
Inventors: 邵延荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2020-05-08

Abstract

The invention belongs to the technical field of reciprocating pumps. The invention discloses a reciprocating booster pump which comprises a shell, a main piston and a first piston, wherein a control chamber and a first working chamber which are mutually independent are arranged in the shell, the main piston is positioned in the control chamber, the first piston is positioned in the first working chamber, the main piston can drive the first piston to axially and synchronously move, so that the oil in the first working chamber is pressurized, and when the main piston moves to the terminal position of the control chamber, the main piston can rotate in the circumferential direction relative to the shell, so that two sides of the main piston are respectively communicated with high-pressure oil alternately, and the main piston automatically reciprocates along the axial direction. The reciprocating booster pump of the invention not only saves the use of an electromagnetic directional valve, a displacement sensor and an electric control component, has simpler and more compact structure, higher integration level and convenient carrying and use, but also avoids the design and processing of a complex oil circuit and reduces the manufacturing difficulty and cost.

Description

Reciprocating booster pump

Technical Field

The invention belongs to the technical field of reciprocating pumps, and particularly relates to a reciprocating booster pump.

Background

The hydraulic booster pump is an ultrahigh pressure hydraulic component which amplifies hydraulic pressure by utilizing the principle that the action areas of two ends of a piston are different and the stress is the same.

At present, the hydraulic pressure boosters used in China are generally divided into two types: one hydraulic pressure booster is characterized in that the reciprocating motion of the booster is controlled to continuously output high pressure by means of continuous reversing of an electromagnetic reversing valve, and the hydraulic pressure booster with the structural form has a complex structure, needs to be provided with a complex displacement sensor and an electric control component, and is large in size and weight, inconvenient to carry and difficult to adopt in the aspect of portable machinery; the other hydraulic pressure booster which controls the reversing of the oil way by using a pure hydraulic oil way has the disadvantages of complex oil way, higher requirement on the processing of parts, and higher processing difficulty and cost. Therefore, a supercharger with simple structure, easy processing, high integration and small volume is urgently needed at present.

Disclosure of Invention

In order to solve the problems of the conventional hydraulic pressure booster, the invention provides a reciprocating booster pump with a brand new structural form. The reciprocating booster pump comprises a shell, a main piston and a first piston; the first piston is fixedly connected with the main piston and moves synchronously;

the inner part of the shell is provided with a control chamber and a first working chamber which are mutually independent, and the shell is provided with a P port, a T port, a first oil inlet and a first oil outlet;

the main piston is positioned in the control chamber and divides the control chamber into a first control chamber and a second control chamber which are independent of each other; the P port and the T port are respectively communicated with the first control chamber and the second control chamber in an alternating mode, when the P port is communicated with the first control chamber, the T port is communicated with the second control chamber, and when the P port is communicated with the second control chamber, the T port is communicated with the first control chamber;

the first piston is located in the first working chamber, and the first oil inlet and the first oil outlet are simultaneously communicated with the first working chamber;

and when the main piston moves to the terminal position of the control chamber, the main piston rotates circularly relative to the shell to complete the communication relation switching of the P port and the T port with the first control chamber and the second control chamber.

Preferably, the outer surface of the main piston is provided with a first oil groove and a second oil groove which are distributed along the axial direction; the first oil groove and the second oil groove are distributed along the circumferential direction, the first oil groove is communicated with the first control chamber along the axial direction, and the second oil groove is communicated with the second control chamber along the axial direction; when the first oil groove is communicated with the P port, the second oil groove is communicated with the T port; when the first oil groove is communicated with the T port, the second oil groove is communicated with the P port.

Preferably, the reciprocating booster pump further comprises an electrified coil group and a magnet group, and the electrified coil group and the magnet group are respectively fixed on the housing and the main piston; wherein two electrified coils in the electrified coil group are symmetrically distributed in the radial direction and form a coil magnetic field, and two magnets in the magnet group are symmetrically distributed in the radial direction and form a magnet magnetic field;

when the electrified coil group and the magnet group relatively move to the magnetic field force interaction area along the axial direction, the electrified coil group and the magnet group relatively rotate in the circumferential direction under the action of magnetic field attraction force, so that the direction of the coil magnetic field and the direction of the magnet magnetic field are consistent, and the circumferential rotation of the main piston relative to the shell is completed.

Preferably, the housing is provided with a first electrified coil group and a second electrified coil group, and the main piston is provided with a first magnet group and a second magnet group; first circular telegram coil assembly with second circular telegram coil assembly is located respectively the both sides of control room, first magnet assembly with second magnet assembly is located respectively the both sides of master piston, and first circular telegram coil assembly with first magnet assembly cooperation drive master piston for the casing carries out the circumferencial direction and rotates, second circular telegram coil assembly with second magnet assembly cooperation drive master piston for the casing carries out the circumferencial direction and rotates.

Preferably, the outer surface of the electrified coil group is provided with a thin-walled sleeve made of stainless steel.

Preferably, the reciprocating booster pump is also provided with a positioning assembly; the positioning assembly is located between the main piston and the shell and used for positioning the circumferential position relation between the main piston and the shell.

Further preferably, the positioning assembly comprises a positioning hole, a positioning spring, a positioning ball and at least two positioning grooves; the positioning hole and the positioning groove are respectively positioned on the shell and the main piston, the positioning spring and the positioning ball are positioned in the positioning hole, and the two positioning grooves are distributed along the circumferential direction and correspond to the distribution positions of the first oil groove and the second oil groove along the circumferential direction; when the main piston rotates relative to the shell in the circumferential direction, the positioning ball compresses the positioning spring and is kept in the positioning hole, when the main piston rotates until the positioning groove is aligned with the positioning hole, one end of the positioning ball is located in the positioning hole, and the other end of the positioning ball extends out of the positioning groove.

Preferably, one end of the main piston is provided with a piston rod; the main piston rod is connected with the shell in a sliding mode, and the end portion of the main piston rod directly serves as the first piston and extends into the first working chamber along the axial direction.

Preferably, the reciprocating booster pump further comprises a second piston, a second working chamber which is mutually independent from the control chamber and the first working chamber is further arranged inside the shell, and a second oil inlet and a second oil outlet are further formed in the shell; the second piston is fixedly connected with the main piston and moves synchronously;

the second piston is located in the second working chamber, and the second oil inlet and the second oil outlet are simultaneously in communication with the second working chamber.

Further preferably, the first piston and the second piston are located on both sides of the main piston, and the first working chamber and the second working chamber are located on both sides of the control chamber.

Compared with the supercharger with the existing structure, the reciprocating booster pump has the following beneficial technical effects:

1. in the invention, the P port connected with the oil inlet pipe and the T port connected with the oil outlet pipe are respectively arranged on the shell, and the P port and the T port are alternately communicated with the control chambers on two sides of the main piston by utilizing the reciprocating rotation of the main piston relative to the shell along the circumferential direction, so that the main piston is driven to axially reciprocate, the first piston and the second piston are driven to respectively carry out pressurization work of reciprocating compression oil in the first working chamber and the second working chamber, and the continuous reciprocating pressurization operation of the oil is realized.

2. In the invention, the electrified coil group and the magnet group are respectively arranged between the shell and the main piston, and the attraction force generated by the magnetic field force generated by the electrified coil group to the magnet group is utilized to enable the electrified coil group and the magnet group to rotate in the circumferential direction, so that the main piston rotates relative to the shell in the circumferential direction, namely, the reversing operation of the main piston is completed. Therefore, the use of an electromagnetic reversing valve, a displacement sensor and an electric control component in the existing supercharger is omitted, the complexity of the structure is greatly reduced, the size and the weight are reduced, the integration level of the whole supercharger is improved, the portable supercharger is convenient to carry and use, the design and the processing of a complex oil way are avoided, the processing difficulty and the cost are reduced, and the processing quality of the whole supercharger is ensured.

Drawings

FIG. 1 is a schematic diagram illustrating a reciprocating booster pump according to an embodiment of the present invention after a main piston is located at a first working chamber terminal end and reversing is completed;

FIG. 2 is a schematic cross-sectional view taken along the line A-A in FIG. 1;

FIG. 3 is a schematic diagram illustrating the reciprocating booster pump of this embodiment after the main piston is located at the end of the second control chamber and the direction change is completed;

FIG. 4 is a schematic cross-sectional view taken along line B-B of FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along the line C-C in FIG. 1;

fig. 6 is a schematic cross-sectional view taken along the direction D-D in fig. 1.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1, the reciprocating booster pump of the present embodiment includes a housing 1, a main piston 2, a left piston rod 3, and a right piston rod 4. The sectional area of the left piston rod 3 and the sectional area of the right piston rod 4 are smaller than the sectional area of the main piston 2, are respectively positioned on two sides of the main piston 2, and are fixedly connected with the main piston 2 along the axial direction.

The casing 1 is a hollow structure, a control chamber, a first working chamber 12 and a second working chamber 13 which are independent from each other are arranged inside the casing 1, and the first working chamber 12 and the second working chamber 13 are respectively positioned on two sides of the control chamber. The shell 1 is provided with a port P, a port T, a first oil inlet 14, a first oil outlet 15, a second oil inlet 16 and a second oil outlet 17. Corresponding oil suction one-way valves and oil outlet one-way valves are respectively arranged in the first oil inlet 14, the first oil outlet 15, the second oil inlet 16 and the second oil outlet 17, so that corresponding one-way oil inlet and one-way oil discharging functions of all oil ports are realized.

The master piston 2 is located in the control chamber and divides the control chamber into a first control chamber 111 and a second control chamber 112, which are independent of each other. Wherein the P port and the T port are alternately communicated with the first control chamber 111 and the second control chamber 112, respectively. When the port P communicates with the first control chamber 111, the port T communicates with the second control chamber 112, and the high-pressure oil enters the first control chamber 111 to drive the main piston 2 to move axially in the direction of the second control chamber 112. When the port P communicates with the second control chamber 112, the port T communicates with the first control chamber 111, and the high-pressure oil enters the second control chamber 112 to drive the main piston 2 to move axially in the direction of the first control chamber 111.

The left piston rod 3 is slidably connected to the housing 1 and extends axially into the first working chamber 12. Under the driving of the reciprocating axial movement of the main piston 2, the end part of the left piston rod 3 performs oil absorption and compression pressurization work of oil liquid in the first working chamber 12.

The right piston rod 4 is slidably connected to the housing 1 and extends axially into the second working chamber 13. Under the driving of the reciprocating axial movement of the main piston 2, the end part of the right piston rod 4 performs oil absorption and oil compression pressurization work in the second working chamber 13.

When the main piston 2 axially moves to the terminal position of the first control chamber 111 or the second control chamber 112 with the left piston rod 3 and the right piston rod 4 under the action of the oil pressure difference between the first control chamber 111 and the second control chamber 112, the main piston 2 circularly rotates relative to the housing 1, thereby completing the switching of the communication relationship between the port P and the port T and the first control chamber 111 and the second control chamber 112, so that the main piston 2 carries the left piston rod 3 and the right piston rod 4 to axially move in opposite directions under the action of the oil pressure difference between the first control chamber 111 and the second control chamber 112 after switching, and further the end parts of the left piston rod 3 and the right piston rod 4 respectively perform the alternate oil suction and the compression pressurization work in the first working chamber 12 and the second working chamber 13, thus, the sectional area of the left piston rod 3 and the sectional area of the right piston rod 4 are smaller than the sectional area of the main piston 2, the pressurized output of the oil in the first working chamber 12 and the second working chamber 13 is realized.

As shown in fig. 1, in the present embodiment, the outer surface of the main piston 2 is provided with a first oil groove 21 and a second oil groove 22 that are arranged in the axial direction. The first oil groove 21 and the second oil groove 22 are distributed in the circumferential direction, and the first oil groove 21 communicates with the first control chamber 111 in the axial direction, and the second oil groove 22 communicates with the second control chamber 112 in the axial direction. The position relation between the first oil groove 21 and the second oil groove 22 corresponds to the position relation between the port P and the port T, that is, when the first oil groove 21 is communicated with the port P, the second oil groove 22 is communicated with the port T, and when the first oil groove 21 is communicated with the port T, the second oil groove 22 is communicated with the port P.

Therefore, by means of the first oil groove and the second oil groove which are axially arranged, the main piston can be ensured to be in the axial reciprocating movement process under the action of the high-pressure oil at the P port, the first control chamber and the second control chamber are kept in a stable communication state with the P port and the T port, and the reliability and the stability of the axial reciprocating movement of the main piston are ensured.

As shown in fig. 1, 2 and 5, in the reciprocating booster pump of the present embodiment, two energizing coil sets and two magnet sets, that is, a first energizing coil set 51, a second energizing coil set 52, and a first magnet set 61, a second magnet set 62 are further provided.

The first and second

energized coil sets

51 and 52 are fixed to the inner surface of the housing 1 and located on both sides of the control room, respectively. The first electrified coil group 51 and the second electrified coil group 52 are each composed of two stator cores symmetrically arranged in the radial direction and a winding wound on the stator cores, wherein the two windings are in-phase windings and respectively form a first coil magnetic field and a second coil magnetic field.

The first magnet group 61 and the second magnet group 62 are respectively fixed on the outer surface of the left piston rod 3 and the outer surface of the right piston rod 4 on two sides of the main piston 2, and are respectively composed of two permanent magnet sheets symmetrically arranged along the radial direction, and respectively form a first magnet magnetic field and a second magnet magnetic field.

During the axial movement of the main piston 2 in the direction of the first control chamber 111, the first magnet set 61 gradually approaches the first energized coil set 51, i.e. the first magnet set 61 gradually enters the first coil magnetic field formed by the first energized coil set 51, and at the same time, the second magnet set 62 gradually moves away from the second energized coil set 52, i.e. the second magnet set 62 gradually moves away from the second coil magnetic field formed by the second energized coil set 52. When the main piston 2 moves to the terminal position of the first control chamber 111, the first magnet group 61 drives the main piston 2 to rotate in the circumferential direction under the action of the magnetic field attraction of the first coil magnetic field, so that the direction of the first magnet magnetic field is changed to be consistent with the direction of the first coil magnetic field, the P port is switched to be communicated with the first oil groove 21, the T port is switched to be communicated with the second oil groove 22, and the reversing of the main piston 2 is completed.

During the axial movement of the main piston 2 in the direction of the second control chamber 112, the first magnet set 61 gradually moves away from the first energized coil set 51, i.e. the first magnet set 61 gradually moves away from the first coil magnetic field formed by the first energized coil set 51, and at the same time, the second magnet set 62 gradually moves closer to the second energized coil set 52, i.e. the second magnet set 62 gradually moves into the second coil magnetic field formed by the second energized coil set 52. When the main piston 2 moves to the end position of the second control chamber 112, the second magnet assembly 62 drives the main piston 2 to rotate in the circumferential direction again under the action of the magnetic field attraction of the second coil magnetic field, so that the direction of the second magnet magnetic field is rotated to be consistent with the direction of the second coil magnetic field, the P port is cut back to be communicated with the second oil groove 22, the T port is cut back to be communicated with the first oil groove 21, and the main piston 2 is reversed again.

In this embodiment, the P port and the T port of the housing 1 are radially distributed while the direction of the magnetic field of the first coil and the direction of the magnetic field of the second coil form an angle of 90 degrees in the circumferential direction, and the direction of the magnetic field of the first magnet and the direction of the magnetic field of the second magnet are kept the same, so that two first oil grooves 21 and two second oil grooves 22 are provided on the outer surface of the main piston 2, and the first oil grooves 21 and the second oil grooves 22 are sequentially and alternately distributed in the circumferential direction, and the central angle between the adjacent two oil grooves is 90 degrees. Like this, under the interact of two circular telegram coil assembly and two magnet groups, the single drives main piston and carries out 90 degrees rotations of circumferencial direction for the casing to accomplish the switching of P mouth and T mouth and first oil groove and second oil groove intercommunication relation, realize main piston's switching-over operation.

Similarly, in other embodiments, the direction of the magnetic field of the first coil and the direction of the magnetic field of the second coil may be directly arranged at an included angle of 180 degrees along the circumferential direction, and the direction of the magnetic field of the first magnet and the direction of the magnetic field of the second magnet are arranged in the same direction, at this time, only one first oil groove and one second oil groove which are radially symmetrical need to be arranged on the outer surface of the main piston, so that the main piston can be driven to rotate 180 degrees along the circumferential direction relative to the housing at a single time, and the communication relationship switching between the first oil groove and the second oil groove of the port P and the port T can be completed.

In this embodiment, the first electrified coil group, the second electrified coil group, the first magnet group and the second magnet group are respectively arranged on the two sides of the control chamber and the left piston rod and the right piston rod, so that the driving of the main piston to rotate in the reciprocating direction along the circumferential direction is realized by respectively utilizing the action of magnetic attraction force between the first electrified coil group and the first magnet group and the action of magnetic attraction force between the second electrified coil group and the second magnet group. Similarly, in other embodiments, the first electrified coil group and the second electrified coil group with different magnetic field directions may also be arranged at a single side of the control chamber at intervals along the axial direction, and the piston rod on the corresponding side is provided with one magnet group, so that in the process of performing axial reciprocating movement between the two electrified coils through the magnet group, the main piston is driven to perform reciprocating rotation in the circumferential direction under the action of magnetic field attraction of the two electrified coil groups. In a similar way, only one electrified coil group is arranged on one side of the control chamber, and two magnet groups with opposite magnetic field directions are arranged on the piston rod of the corresponding side at intervals along the axial direction, so that the two magnet groups with different magnetic field directions respectively drive the main piston to rotate in the circumferential direction under the action of the magnetic field attraction of the electrified coil group in the relative axial movement process of the electrified coil group between the two magnet groups.

Furthermore, in this embodiment, the electrical coil assembly is fixed to the housing and the magnet assembly is fixed to the piston rod, and similarly, in other embodiments, the electrical coil assembly may be fixed to the piston rod and the magnet assembly may be fixed to the housing, even directly to the outer surface of the main piston near the end.

Referring to fig. 1 and 5, in the present embodiment, the permanent magnet pieces constituting the magnet assembly are fixed to the outer surface of an annular rotor 71 by screws, and the annular rotor 71 is fixed to the piston rod by a snap spring. Like this, it is fixed not only to be convenient for carry out the dismouting to magnet group, improves the convenience of operation, but also can be according to in service behavior, the different magnet group of quick replacement realizes this reciprocal booster pump's different performance, improves the availability factor.

In addition, as shown in fig. 1 and 5, in the present embodiment, a thin-walled sleeve 72 made of stainless steel is further disposed on the outer surface of the energized coil assembly. Like this, with oil liquid drainage to electrical coil group position department in the control room, when utilizing oil to assist the cooling to electrical coil group, just can keep apart the direct contact of electrical coil group and oil with the help of the thin wall sleeve, realize the protection to winding on stator core winding, can not cause the influence to the magnetic field force effect of permanent magnetism piece and the oil hydraulic pressure in the control room simultaneously.

As shown in fig. 1 and 6, a positioning assembly is further provided in the reciprocating booster pump of the present embodiment. The positioning assembly is located between the main piston and the shell and used for assisting in positioning the circumferential position relation between the main piston and the shell.

The positioning assembly includes a positioning hole 81, a positioning spring 82, a positioning ball 83 and four positioning grooves 84. Wherein, the positioning hole 81 is opened on the inner surface of the housing in sliding contact with the piston rod, the positioning spring 82 and the positioning ball 83 are located in the positioning hole 81, the positioning groove 84 is axially arranged on the outer surface of the left piston rod 3, and the distribution positions of the four positioning grooves 84 in the circumferential direction correspond to the distribution positions of the first oil groove 21 and the second oil groove 22 in the circumferential direction.

At this time, during the circumferential rotation of the main piston 2 relative to the housing 1, the positioning ball 83 compresses the positioning spring 82 and is held in the positioning hole 81, and when the main piston 2 rotates until the positioning hole 81 is aligned with the positioning groove 84, the positioning ball 83 partially protrudes into the positioning groove 84 and partially remains in the positioning hole 81 under the action of the positioning spring 82, thereby forming a position fixation between the main piston 2 and the housing 1 in the circumferential direction. Therefore, the main piston can be positioned in the circumferential direction by means of the contact of the positioning balls and different positioning grooves, and the auxiliary positioning of the position of the main piston after the main piston is reversed can be realized, so that the position accuracy and the stability of the main piston in the axial reciprocating movement process are ensured.

Similarly, in other embodiments, the positioning hole may be disposed on the housing sleeve, and the positioning groove may be disposed on the piston rod, even with other structures, such as a positioning pin, to fix the position of the main piston and assist in positioning.

In this embodiment, through directly extending to in first studio and the second studio with the tip of left piston rod and right piston rod respectively, thereby carry out the suction and the compression pressure boost work of fluid in first studio and second studio by the tip of left piston rod and right piston rod as first piston and second piston respectively, thereby save the setting to extra independent first piston and second piston, improve the utilization ratio of spare part, reduce part quantity, improve whole reciprocal booster pump's integrated level. Similarly, in other embodiments, according to the operating condition and design requirements, the independent first piston and the independent second piston may be provided and are respectively connected to the main piston in an axially fixed manner by an independent connecting rod, and the main piston is driven by the main piston to perform axial reciprocating movement, so that the left piston rod and the right piston rod can be simply connected to the housing in an axially sliding manner, and the positioning assembly and the magnet assembly can be arranged, or even the left piston rod and the right piston rod are directly removed, and the main piston can be used for arranging the magnet assembly and the positioning assembly.

In addition, in this embodiment, through set up first studio and second studio respectively in the both sides of control room to extend to in first studio and the second studio with the tip of left piston rod and right piston rod respectively, thereby realized main piston reciprocating motion in-process, left piston rod and right piston rod do work to the alternative compression pressure boost working of fluid in first studio and the second studio, improve the compression pressure boost working efficiency to fluid. However, in other embodiments, the reciprocating booster pump can be designed to have only one working chamber according to different working conditions, that is, only one piston rod is reserved to perform pressurization work on the oil in the corresponding working chamber, so that the length of the whole shell can be properly reduced, the volume of the whole reciprocating booster pump is reduced, and a structural form of unidirectional oil pressurization work is formed. Even, the first working chamber and the second working chamber can be sequentially arranged on the same side of the control chamber, the piston rod is designed to be of a step-shaped structure and sequentially penetrates through the first working chamber and the second working chamber, so that a one-way compression oil pressurizing and working mode is formed, and the one-way oil pressurizing and working efficiency is improved.

In addition, as shown in fig. 1, in this embodiment, the housing 1 is designed in a split structure, and is composed of five parts of housings respectively corresponding to the control room, the first electrified coil set, the second electrified coil set, the first working room and the second working room, and the five parts of housings are sequentially axially and fixedly connected through bolts. Like this, not only be convenient for to whole casing manufacturing, reduce the processing degree of difficulty and cost, be convenient for moreover to each part dismantle the operation, improve the convenience of packaging efficiency and maintenance.

Referring to fig. 1 to 4, when the reciprocating booster pump of this embodiment works, the P port is connected to the oil inlet pipe, the T port is connected to the oil outlet pipe, the first oil inlet and the second oil inlet are connected to the low pressure oil pipe, the first oil outlet and the second oil outlet are connected to the high pressure oil pipe, the first electrical coil assembly and the second electrical coil assembly are energized, and the specific working process is as follows:

when the main piston 2 moves towards the first working chamber 12, the left piston rod 3 is driven to perform compression pressurization work on low-pressure oil in the first working chamber 12 and output the pressurized oil through the first oil outlet 15, and meanwhile, the right piston rod 4 is driven to perform oil introduction operation in the second working chamber 13 and introduce the low-pressure oil through the second oil inlet 16. At this time, the high-pressure oil outputted from the oil inlet pipe flows into the second control chamber 112 through the port P and the second oil groove 22, and the oil in the first control chamber 111 is communicated with the oil outlet pipe through the first oil groove 21 and the port T. Meanwhile, under the driving of the main piston 2, the first magnet set 61 gradually approaches the first energized coil set 51, that is, the first magnet set 61 gradually enters the first coil magnetic field formed by the first energized coil set 51, and the second magnet set 62 gradually leaves the second coil magnetic field formed by the second energized coil set 52, that is, the second magnet set 62 gradually leaves the second coil magnetic field formed by the second energized coil set 52.

When the main piston 2 moves to the terminal position of the first control chamber 111, the first magnet group 61 completely enters the first coil magnetic field formed by the first energized coil group 51, and overcomes the fixed acting force of the positioning groove 84 to the positioning ball 83 along the circumferential direction under the action of the magnetic field force of the first coil magnetic field, so that the main piston 2 is driven to rotate in the circumferential direction through the first magnet group 61, the direction of the first magnet magnetic field is rotated to be consistent with the direction of the first coil magnetic field, the port P is switched to be communicated with the first oil groove 21, the port T is switched to be communicated with the second oil groove 22, and the reversing operation of the main piston 2 is completed. At the same time, the detent ball 83 is re-inserted into the adjacent detent 84, resulting in a circumferential re-positioning of the master piston 2.

When the main piston 2 moves towards the second working chamber 13, the left piston rod 3 is driven to perform oil liquid introduction operation in the first working chamber 12 and low-pressure oil liquid is introduced through the first oil inlet 14, and meanwhile, the right piston rod 4 is driven to perform compression pressurization working of the low-pressure oil liquid in the second working chamber 13 and output the pressurized oil liquid through the second oil outlet 17. At this time, the high-pressure oil outputted from the oil inlet pipe flows into the first control chamber 111 through the port P and the first oil groove 21, and the oil in the second control chamber 112 is communicated with the oil outlet pipe through the second oil groove 22 and the port T. Meanwhile, under the driving of the main piston 2, the first magnet set 61 gradually gets away from the first energized coil set 51, that is, the first magnet set 61 gradually gets away from the first coil magnetic field formed by the first energized coil set 51, and simultaneously, the second magnet set 62 gradually gets close to the second energized coil set 52, that is, the second magnet set 62 gradually gets into the second coil magnetic field formed by the second energized coil set 52.

When the main piston 2 moves to the end position of the second control chamber 112, the second magnet assembly 62 completely enters the second coil magnetic field formed by the second electrified coil assembly 52, and overcomes the fixed acting force of the positioning slot 84 on the positioning ball 83 along the circumferential direction under the action of the magnetic field force of the second coil magnetic field, so that the main piston 2 is driven by the second magnet assembly 62 to rotate in the circumferential direction, the direction of the second magnet magnetic field is rotated to be consistent with the direction of the second coil magnetic field, the port P is cut back to be communicated with the second oil groove 22, the port T is cut back to be communicated with the first oil groove 21, and the re-reversing operation of the main piston 2 is completed. At the same time, the detent ball 83 is re-inserted into the adjacent detent 84, resulting in a circumferential re-positioning of the master piston 2.

And the reciprocating actions are repeated in sequence to finish the reciprocating compression pressurization work doing operation of the oil liquid by the reciprocating booster pump under the action of hydraulic drive and magnetic field force.

Claims

1. A reciprocating booster pump is characterized by comprising a shell, a main piston and a first piston; the first piston is fixedly connected with the main piston and moves synchronously;

2. The reciprocating booster pump of claim 1, wherein the outer surface of the main piston is provided with a first oil groove and a second oil groove which are arranged in an axial direction; the first oil groove and the second oil groove are distributed along the circumferential direction, the first oil groove is communicated with the first control chamber along the axial direction, and the second oil groove is communicated with the second control chamber along the axial direction; when the first oil groove is communicated with the P port, the second oil groove is communicated with the T port; when the first oil groove is communicated with the T port, the second oil groove is communicated with the P port.

3. The reciprocating booster pump of claim 1, further comprising an electrical coil assembly and a magnet assembly, and wherein the electrical coil assembly and the magnet assembly are fixed to the housing and the main piston, respectively; wherein two electrified coils in the electrified coil group are symmetrically distributed in the radial direction and form a coil magnetic field, and two magnets in the magnet group are symmetrically distributed in the radial direction and form a magnet magnetic field;

4. The reciprocating booster pump of claim 3, wherein a first set of energized coils and a second set of energized coils are provided on the housing, and a first set of magnets and a second set of magnets are provided on the main piston; first circular telegram coil assembly with second circular telegram coil assembly is located respectively the both sides of control room, first magnet assembly with second magnet assembly is located respectively the both sides of master piston, and first circular telegram coil assembly with first magnet assembly cooperation drive master piston for the casing carries out the circumferencial direction and rotates, second circular telegram coil assembly with second magnet assembly cooperation drive master piston for the casing carries out the circumferencial direction and rotates.

5. The reciprocating booster pump of claim 3, wherein the outer surface of the electrical coil assembly is provided with a thin-walled sleeve of stainless steel.

6. The reciprocating booster pump of claim 1, further provided with a positioning assembly; the positioning assembly is located between the main piston and the shell and used for positioning the circumferential position relation between the main piston and the shell.

7. The reciprocating booster pump of claim 6, wherein the positioning assembly comprises a positioning hole, a positioning spring, a positioning ball and at least two positioning grooves; the positioning hole and the positioning groove are respectively positioned on the shell and the main piston, the positioning spring and the positioning ball are positioned in the positioning hole, and the two positioning grooves are distributed along the circumferential direction and correspond to the distribution positions of the first oil groove and the second oil groove along the circumferential direction; when the main piston rotates relative to the shell in the circumferential direction, the positioning ball compresses the positioning spring and is kept in the positioning hole, when the main piston rotates until the positioning groove is aligned with the positioning hole, one end of the positioning ball is located in the positioning hole, and the other end of the positioning ball extends out of the positioning groove.

8. The reciprocating booster pump of any one of claims 1-7, wherein one end of the main piston is provided with a piston rod; the main piston rod is connected with the shell in a sliding mode, and the end portion of the main piston rod directly serves as the first piston and extends into the first working chamber along the axial direction.

9. The reciprocating booster pump of any one of claims 1-7, further comprising a second piston, wherein a second working chamber independent of the control chamber and the first working chamber is further provided inside the housing, and a second oil inlet and a second oil outlet are further provided on the housing; the second piston is fixedly connected with the main piston and moves synchronously;

10. The reciprocating booster pump of claim 9, wherein said first piston and said second piston are located on both sides of said main piston, and said first working chamber and said second working chamber are located on both sides of said control chamber.