CN210087562U - Integral multi-row high-pressure radial multi-plunger variable pump - Google Patents

Abstract

The utility model provides a radial many plungers variable pump of integral type multirow high pressure belongs to hydraulic pump equipment technical field, comprises eccentric shaft, bearing, the pump body, plunger and plunger bushing, holding block, holding screw, check valve, relief valve. The eccentric wheel on the transmission shaft makes eccentric motion to drive the plunger piston to reciprocate so as to extrude the cavity space inside the plunger sleeve and extrude high-pressure oil, and the flow direction and the oil pressure of the oil are controlled by the check valve and the pressure release valve. This plunger pump novel structure, traditional radial plunger pump radial dimension is big, and axial dimension is little, the utility model discloses with two rows of plunger assemblies on a pump body, not only effectively exert the structural advantage of radial plunger pump, also increased output, reach the effect of two plunger pumps joint work to for two plunger pump weight and volume are littleer, manufacturing cost is lower, and its sealed face also reduces relatively, has reduced and has leaked.

Description

Integral multi-row high-pressure radial multi-plunger variable pump

Technical Field

The utility model belongs to the technical field of hydraulic pump equipment, a hydraulic pump is related to, especially relate to a radial many plunger variable pump of integral type multirow high pressure.

Background

The plunger pump is an important hydraulic device and is divided into an axial plunger pump and a radial plunger pump, and compared with other pumps, the plunger pump is more pressure-resistant, impact-resistant and higher in efficiency.

Generally speaking, the plungers in the radial plunger pump are radially arranged, and only one row of plungers is arranged in the axial direction, so that the radial dimension is large, the axial dimension is small, and the structural advantages of the radial plunger pump can be better exerted if a plurality of plungers are axially connected in a row. But not only the mass and volume are multiplied by the row of other pumps, but also the sealing area of the joint is increased, and the leakage is increased.

Disclosure of Invention

The utility model discloses an overcome prior art not enough, provide a double plunger increase output flow reduce unnecessary volume simultaneously sealed integral type multirow high pressure radial many plunger variable displacement pump.

In order to realize the above-mentioned purpose, the utility model provides a radial many plungers variable pump of integral type multirow high pressure installs two rows of plunger assemblies in a pump body, including the pump body, power part, control section, oil tank and auxiliary component.

The pump body is in an octahedron shape, and the pump body is provided with a pressure release valve mounting hole perpendicular to the plane of the outer side of the pump body, two rows of symmetrical plunger cylinder body mounting holes, an oil tank mounting hole, a pressure release valve mounting hole perpendicular to planes on two sides and a set screw mounting hole. An oil way hole is formed in the pump body, and an oil way blocking component is matched with the oil way hole to realize oil way sealing and oil way design.

The power part is arranged in the pump body along the axial direction of the pump body except the radial distribution of the plunger assemblies, and comprises an eccentric shaft, the plunger assemblies, a flange plate assembly, a speed reducer assembly and a direct current motor which are sequentially connected to the pump body. Each plunger includes a plunger barrel, a plunger spring, and a plunger cap. One end of the plunger cylinder is in contact with the circumferential direction of the needle roller bearing on the eccentric shaft. One end of the plunger spring is connected to the plunger barrel. The plungers are respectively assembled at the plunger cylinder body mounting holes in the center of the plunger cylinder body in an interference fit mode, and when the eccentric shaft drives the eccentric shaft bearing to rotate, the plungers are driven to reciprocate in the plunger cylinder body, so that oil is pumped out from the axial oil outlet. The center of the plunger cylinder body is provided with a plunger cylinder body mounting hole, the side surface of the plunger cylinder body is provided with an axial oil outlet hole, and the plunger cylinder body mounting hole is fixed when the head of the double-inlet single-outlet one-way valve is inserted. The surface of each plunger cylinder body is provided with an oil inlet groove perpendicular to the axis of the mounting hole of the plunger cylinder body, oil reaches the bottom end of the plunger cylinder body through the oil inlet groove, a one-way valve and a filter screen are arranged at the oil inlet position at the bottom of the plunger cylinder body, and the oil enters in a one-way mode after being filtered.

According to different use conditions, the plunger and the plunger cylinder body are divided into two types (refer to an attached drawing 5 and an attached drawing 5A in the specification), one type is that the size of a plunger cylinder is large, the inner cavity of the corresponding plunger cylinder body is also large, the adjacent plunger assemblies are completely the same, and share one pressure release valve with a small pressure release threshold value and is used for outputting low-pressure large flow, the other type is the same as the former type in shape and structure, but the inner cavity of the plunger and the plunger cylinder body is small, similarly, the two adjacent plunger assemblies are completely the same, share one pressure release valve with a large pressure release threshold value and is used for outputting high-pressure small flow, and the setting enables the power to be mainly used for outputting low pressure when no-load or low load is carried out, the power has large flow and high execution speed, and when load is carried out, the power is mainly used for outputting high.

The control part such as a one-way valve and a pressure relief valve is arranged in the pressure relief valve mounting hole and fixed through a thread structure, and controls the flow direction and the oil pressure of hydraulic oil in the pump body. Wherein two advance single-outlet check valves are used for preventing that oil from getting back to in the plunger cylinder body and fixed plunger cylinder body, and the check valve is located in the relief valve oil outlet pipe in the pipeline for prevent that inside oil pressure is not high-pressure oil through the relief valve outflow simultaneously. The pressure relief valve is arranged in the oil way and used for keeping the oil pressure inside the pump body stable. The double-inlet single-outlet one-way valve comprises a valve body, a valve core 103, a spring 104 and a valve cover 105, wherein the valve body is cylindrical and is matched and sealed with an oil passage, the head 101 is provided with an external thread and is fixed in the pump body, a cylindrical bulge with an opening is arranged and inserted into the oil outlet hole of the plunger cylinder body, the valve body is hollow, the middle opening 102 is used for oil outlet, the tail end opening is used for installing the valve core 103 and the spring 104 inside, finally, the valve cover is arranged, the valve core is jacked open to enable oil to flow when oil is discharged, the oil is compacted to realize one-way circulation when flowing back, two ends are respectively provided with a valve core, springs are arranged between the valve cores for connection, when the valve cores at two ends are opened and closed, namely oil is alternately fed at two ends, the working state is optimal, one end of the valve cover is a tail end, the one-way valve is used for fixing the cylinder body of the rear row of the plungers, the valve cover is also provided with a bulge which is the same as the head part and performs the same function, and the one-way valve is matched and screwed after penetrating into the pump body by a hexagonal structure. The structure principle of the one-way valve in the pipeline is similar, and the difference is that a straight groove is arranged on the valve cover to facilitate screwing.

The oil tank is arranged on the outer side of the pump body and communicated with the pump body and the external actuating mechanism.

The back row plunger cylinder body holding block among the auxiliary component is installed and is used for fixed plunger cylinder body in the plunger cylinder body mounting hole of back row, and the installation area of holding block does not get through in the mounting hole for the holding block can be held, puts into the holding block after the plunger cylinder body is put into and is fixed in two single-out check valves that advance, and holding block one side trompil makes and is fixed after holding screw is tightly decided along this hole. The auxiliary screwing sleeve is a matched auxiliary mounting tool, one end of the auxiliary screwing sleeve is provided with a hole and is of an inner hexagonal structure and matched with an outer hexagonal structure in the double-inlet single-outlet one-way valve, and the other end of the auxiliary screwing sleeve is of an outer hexagonal shape so that other hexagonal wrenches can be conveniently sleeved and screwed

To sum up, the hydraulic pump of the utility model drives the plunger piston to reciprocate by the eccentric motion of the eccentric wheel on the eccentric shaft, thereby extruding the cavity space inside the plunger sleeve, extruding high pressure oil, and controlling the oil flow direction and oil pressure by the check valve and the relief valve, the plunger pump has novel structure, the radial size of the traditional radial plunger pump is large, the axial size is small, the utility model not only effectively exerts the structural advantages of the radial plunger pump, but also increases the output power, achieves the effect of the common work of the two traditional radial plunger pumps, has smaller weight and volume compared with the two plunger pumps, has lower production cost, relatively reduces the sealing surface, reduces the leakage, and enables the plunger cylinder bodies to be arranged in two rows and be fixed in one pump body together by the setting block of the double-in single-out check valve and the rear-row plunger cylinder body, and the same oil way is shared, so that the unnecessary volume is reduced.

Drawings

Fig. 1 is a schematic structural diagram of an integrated multi-row high-pressure radial multi-plunger variable pump according to an embodiment of the present invention;

FIG. 2 is an exploded view of the integrated multi-row high pressure radial multi-plunger variable displacement pump;

FIG. 3 is a schematic view of the pump body;

FIG. 4 shows a three-dimensional view of the pump body and a cross-sectional view of the pump body;

FIG. 5 is a schematic view of a plunger and plunger cylinder arrangement of a plunger assembly;

FIG. 5A is a schematic view of another plunger and plunger cylinder arrangement of the plunger assembly;

FIG. 6 is a schematic structural diagram of a check valve in a pipeline and a sectional view of a valve body;

FIG. 7 is an exploded view of a check valve in a pipeline;

fig. 8 is a schematic structural view of the double-inlet single-outlet check valve.

Fig. 9 shows an enlarged schematic view of the eccentric shaft and the bearing.

FIG. 10 is an enlarged schematic view of the tightening aid sleeve and tightening piece;

wherein, the flange plate assembly-1, the eccentric shaft assembly-2, the eccentric shaft-20, the eccentric wheel-21, the shaft tail-22, the needle roller bearing-3 and the bearing-4,

a pump body-5, an oil inlet-50, a central hole-51, a front row plunger hole-52, a second through hole-53, a pressure relief valve mounting hole-54, a rear row plunger hole-55, a second valve mounting hole-56, a third through hole-57, a first communicating channel-571, a first oil outlet-58, a second oil outlet-59,

plunger assembly-6, sealing cover-61, plunger oil groove-62, plunger oil hole 63,

a tightening piece-7, a tightening piece placing part-71, a pressure release valve-8,

a one-way valve-9 in the pipeline, a second valve body-91, a straight groove-911, a fourth communicating channel-912, a second valve cover-92, a round cover-921, an end-922, a fifth communicating channel-923, a second valve core-93 and a second spring-94,

a double-inlet single-outlet one-way valve-10, a first valve body-100, a head-101, a second communication channel-1011, an opening-102, a first valve core-103, an oil blocking part-1031, a limiting part-1032, an oil groove-1033, a first spring-104, a first valve cover-105, a fixing part-1051, a limiting ring-1052, a screwing part-1053, a tail-1054 and a third communication channel-1055,

a set screw-11 and a screwing-assisting sleeve-12.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and fig. 2, the present embodiment provides an integrated multi-row high-pressure radial multi-plunger variable displacement pump, including:

the pump body 5 is in an octahedral prism shape, wherein two rows of plunger holes for placing the plunger assemblies 6 and a second through hole 53 are respectively arranged on four side surfaces, and the plunger holes on the back row are provided with a fastening piece placing part 71, the plunger holes on different sides are communicated through a cavity body in the pump body 5, a first communicating channel 571 is arranged in the pump body 5 between the plunger holes on the same side, a third through hole 57 is formed in the hole wall of the rear row of post plug holes 55, the third through hole 57 is communicated with the bottom surface of the pump body 5, the other two side surfaces of the pump body 5 are provided with relief valve mounting holes 54, the relief valve mounting holes 54 are communicated with the second through hole 53, one side surface of the other side surfaces of the pump body 5 is provided with an oil inlet hole 51, the oil inlet hole 51 is communicated with a cavity inside the pump body 5, the cavity inside the pump body 5 is a cylinder, and the bottom of the cavity is provided with a shaft hole for placing the eccentric shaft bearing 4 and the fixed shaft tail 22;

a power section provided inside the pump body 5;

a control portion provided in the pump body 5, controlling the flow direction and oil pressure of the hydraulic oil in the pump body 5;

the oil tank is arranged at the oil inlet hole 51 of the pump body 5 and communicated with the pump body 5;

an auxiliary component;

wherein, the structure of the pump body 5 is the utility model discloses an important part, be provided with two rows of plunger assemblies 6 on a plurality of sides of the pump body 5 respectively on the one hand, the full play radial plunger pump's structural advantage, the output of pump has been increased, for traditional radial plunger pump, it can reach the effect of two traditional radial plunger pump worked jointly, and reduced the volume, sealed face also reduces relatively, effectively prevent to reveal, on the other hand, still be provided with the check valve of two kinds of different grade types on the bottom surface of the pump body 5, can be effectual the oil pressure of the hydraulic oil in the control pump body 5 interior oil circuit and the flow direction of hydraulic oil, this paper is follow-up to combine the detailed structure to the pump body 5 of other drawings to carry out the detailed description.

The power part comprises an eccentric shaft assembly 2 arranged in a pump body 5, a plunger assembly 6, an oil cavity blocking assembly of the pump body 5, a flange plate assembly 1, a direct current motor and a reducer assembly, wherein the eccentric shaft 20 in the pump body 5 rotates, and then an eccentric wheel 21 arranged on the eccentric shaft drives the plunger to do circular reciprocating motion, so that the oil pump works normally.

Referring to fig. 9, fig. 9 shows the structure of the eccentric shaft 20 and the bearing 4, wherein the bearing 4 further comprises a needle bearing 3, and the eccentric shaft assembly 2 comprises:

the eccentric shaft 20, the eccentric shaft bearing 4, the two eccentric wheels 21 and the shaft tail 22, wherein the shaft tail 22 is positioned at one end of the eccentric shaft 20;

the eccentric shaft bearing 4 is arranged on the shaft tail 22;

two eccentric wheels 21 are arranged on the eccentric shaft 20, the eccentric directions of the two eccentric wheels 21 are opposite, and the two eccentric wheels 21 are used for driving the plunger to reciprocate.

The other end of the eccentric shaft 20 is connected with a direct current motor and a reducer assembly through a flange plate assembly 1.

The control part is provided with two check valves, one is a first check valve, the second is a second check valve, the first check valve is a double-inlet single-outlet check valve 10, four first check valve mounting holes (namely, third through holes 57) are formed in the bottom surface 5D of the pump body 5 and used for correspondingly mounting the four double-inlet single-outlet check valves 10 respectively, and the double-inlet single-outlet check valves 10 enter from the third through holes 57 and are fixedly mounted in the first communication channel 571; the second check valve is an in-pipe check valve 9, two second valve mounting holes 56 are also provided on the bottom surface 5D of the pump body 5, and one in-pipe check valve 9 is mounted in each second valve mounting hole 56.

Although not shown, an oil passage is provided in the pump body 5, the two pipe check valves 9 are communicated with each other through the oil passage, and the oil passage is also communicated with the relief valve mounting hole 54, so that the two pipe check valves 9 are also communicated with the relief valve 8 mounted in the relief valve mounting hole 54.

The structure of the oil tank for supplying the radial plunger pump with hydraulic oil that enters the pump body 5 from the oil inlet hole 51 is not shown in this specification.

Referring to fig. 2, fig. 2 shows a position structure among the flange plate assembly 11, the eccentric shaft 20, the needle roller bearing 3, the bearing 4, the pump body 5, the plunger assembly 6, the tightening piece 7, the pressure release valve 8, the in-pipe one-way valve 9 and the double-in single-out one-way valve 10.

Wherein, fig. 5 shows the structure of the plunger assembly, the plunger assembly 6 includes: the plunger piston moves in the plunger piston cylinder body, and the surface of the plunger piston cylinder body is provided with a plunger piston oil hole 63 as an oil outlet hole and a plunger piston oil groove 62 vertical to the axis of the plunger piston oil hole 63.

As shown in fig. 3, the structure of the pump body 5 is obtained by:

the method comprises the following steps: a central hole 51 is drilled inwards at the center of the top surface 5A (opposite to the bottom surface 5D) of the pump body 5 to serve as an oil cavity of the pump body 5, wherein, although not shown, a hole for placing the bearing 4 is formed at the bottom of the oil cavity, and holes are formed around the central hole 51 on the surface 5A to be matched with a mounting flange;

step two: the side surface of the pump body 5 is provided with a front row plunger hole 52 and a rear row plunger hole 55 which are directly communicated with an oil cavity of the pump body 5 and used for installing a plunger cylinder body, and fixed installation holes are drilled at two sides of the front row plunger hole 52 and the rear row plunger hole 55 and used for installing a fixed sealing cover 61 (shown in figure 5) after the plunger cylinder body is installed, wherein the rear row plunger hole 55 is non-circular, a fastening piece placing part 71 is arranged in the rear row plunger hole and used for installing a fastening piece 7, the region where the fastening piece 7 is located is not communicated with the main oil cavity so as to support the fastening piece 7, and the plunger cylinder body in the rear row plunger hole 55 can be fixed through the fastening piece 7;

step three: a third through hole 57 is formed in the bottom surface 5D of the pump body 5, the third through hole 57 leads to the first communication channel 571 and is communicated with the first through hole, the front-row plunger hole 52 is communicated with the third through hole 57 through the first communication channel 571, the rear-row plunger hole 55 is directly communicated with the third through hole 57, a small hole is formed between the front-row plunger hole 52 and the first communication channel 571, the length of the small hole is about 2mm, so that the head 101 of the double-in single-out check valve 10 can be communicated with the plunger cylinder in the front-row plunger hole 52 through the small hole, the inner wall of the first communication channel 571 is provided with internal threads, the outer wall of the double-in single-out check valve 10 is provided with external threads, and the double-in single-out check valve 10 is installed and fixed in the first communication channel 571 through the engagement of the internal threads and the external threads, wherein the plunger cylinder installation holes on the four sides of the pump body 5 are operated;

step four: a second through hole 53 is formed, the second through hole 53 is communicated with a cavity in the pump body 5, the two hole positions are respectively positioned between two adjacent pipelines provided with the double-inlet single-outlet one-way valve 10 and are right opposite to the opening 102 of the double-inlet single-outlet one-way valve 10, and the insides of the two holes are blocked to form an oil channel;

step five: a second valve mounting hole 56 is formed in the bottom surface 5D of the pump body 5 and used for mounting the one-way valve 9 in the pipeline, the second valve mounting hole 56 is axially communicated with the oil duct in the fourth step, the second valve mounting hole 56 is divided into two sections when being formed, a small hole is firstly punched for the first time and is directly communicated with the oil duct, a large hole is punched for the second time, the depth of the small hole is about one third, and threads are tapped inwards to mount and fix the one-way valve 9 in the pipeline;

step six: a pressure relief valve mounting hole 54 is formed in the side face of the pump body 5, the lower end oil duct is communicated with the pressure relief valve 8, a thread is tapped in the pressure relief valve 8, a hole facing the pressure relief port is formed in the surface 5A facing the pressure relief port of the pressure relief valve 8, a hole is formed in the surface 5B to enable the surface 5A to be perforated and then to be directly communicated with an oil cavity of the pump body 5, two holes are blocked at the outer side to form an oil return channel, and the fifth step is repeated on the other two adjacent pairs of pipelines provided with the double-inlet single-outlet one-way valve 10 to form two mutually;

step seven: a second oil outlet hole 59 is formed in the side face of the pump body 5, the two independent oil passages in the step six are communicated, a first oil outlet hole 58 is formed in the bottom face 5D of the pump body 5 and communicated with the second oil outlet hole 59, all the outer side holes in the pump body 5 except the first oil outlet hole 58 are plugged, and the hole 58 is an oil outlet hole;

step eight: a plurality of oil inlets 50 are formed in the middle of the 5C surface of the pump body 5 and directly communicated with an oil cavity to serve as the oil inlets 50.

A plurality of holes are formed in the pump body 5 to form corresponding oil passages, so that the control part on the pump body 5 can effectively control the oil pressure of hydraulic oil in the pump body 5 and the flow direction of the hydraulic oil, and the hydraulic oil is prevented from leaking.

Referring to fig. 4, fig. 4 shows a three-dimensional view of the pump body 5 and a cross-sectional view of the pump body 5, in which the communication of the oil passages and the pipes within the pump body 5 can be seen in phantom.

When the integrated multi-row high-pressure radial multi-plunger variable pump is installed, the steps are as follows:

the method comprises the following steps: the needle roller bearing 3 and the bearing 4 are sequentially arranged on the eccentric shaft 20, then the eccentric shaft 20 together with the bearings 3 and 4 are placed into the pump body 5, and then the flange plate 1 penetrates through the eccentric shaft 20 and is fixed on the top surface 5A of the pump body 5;

step two: installing the pressure relief valve 8 in the pressure relief valve installation hole 54, and installing the one-way valve 9 in the pipeline in the second valve installation hole 56;

step three: installing a plunger assembly 6 in the front row plunger plug hole 52, firstly installing a plunger and a spring in a plunger cylinder body, then integrally placing the plunger cylinder body into the front row plunger hole 52 to ensure that an oil outlet 63 of the plunger cylinder body is right opposite to an oil inlet 51 in the pump body 5, then inserting the double-inlet single-outlet one-way valve 10 along the third through hole 57 to ensure that the head 101 of the double-inlet single-outlet one-way valve is just inserted into a plunger oil hole 63 of the plunger cylinder body, then utilizing the screwing-assisting sleeve 12 to assist in screwing, and then covering the sealing cover 61;

step four: installing the rear row plunger assembly 6, firstly installing the plunger and the spring in the plunger cylinder body, then placing the whole plunger into the rear row plunger hole 55, because one end of the double-inlet single-outlet one-way valve 10 extends out of the hole 5D, when in installation, firstly placing the whole plunger at a supporting plate, aligning the plunger oil hole 63 with the center of the valve cover 105 and then inserting the plunger oil hole 63 into the plunger oil hole 63 of the cylinder body, then installing and fixing the tightening piece 7 at the tightening piece placing part 71, utilizing the tightening assisting sleeve 12 to assist in tightening, and then covering the sealing cover 61;

and step five, connecting the speed reducer and the motor.

Through setting up prismatic pump body 5 for can install multirow plunger assembly 6 on the side of pump body 5, improve output, reduce the whole volume of pump body 5 moreover, the effectual hydraulic oil that prevents takes place to leak.

Referring to fig. 8, fig. 8 shows the structure of the double-in single-out check valve 10;

wherein, two business turn over single-outlet check valves 10 include:

a first valve body 100, the first valve body 100 being a cylinder and having a hollow interior, one end of the first valve body 100 having an external thread, and is provided with a head 101, the head 101 is a slender cylinder, the head 101 passes through the small hole, is communicated with the plunger bushing in the front row plunger hole 52, a second communication channel 1011 is arranged in the head part 101 and is communicated with the inside of the first valve body 100, the other end of the first valve body 100 is provided with internal threads, the side wall of the middle part of the first valve body 100 is provided with an opening 102, the opening 102 comprises a first arc notch with the arc length equal to a semicircle and a second arc notch with the arc length corresponding to the first arc notch slightly smaller than the semicircle, the opening 102 is positioned below the second through hole 53, so that the oil in the second through hole 53 flows into the opening 102, and the sum of the arc length of the projection formed on the opening 102 by the second through hole 53, the arc length of the first arc notch and the arc length of the second arc notch is greater than the circumference of the first valve body 100;

the first valve element 103, two ends of the interior of the first valve body 100 are respectively provided with a first valve element 103, the first valve element 103 is a cylinder, the side wall of the first valve element is provided with an oil groove 1033, one end of the first valve element 103 is provided with an oil blocking part 1031, the oil blocking part 1031 is conical, the other end of the first valve element is provided with a limiting part 1032, and the limiting part 1032 is in a smaller cylinder shape;

the first valve cover 105, the first valve cover 105 includes the fixed portion 1051, the limiting ring 1052, the screwing position 1053 and the tail 1054, the fixed portion 1051 is cylindrical, the fixed portion 1051 is provided with external threads which are engaged with the internal threads at the other end of the first valve body 100, the limiting ring 1052 is arranged at the tail end of the fixed portion 1051 and is in a round cake shape, the diameter of the limiting ring is larger than that of the fixed portion 1051, the screwing position 1053 is in a hexagonal structure, the tail 1054 is cylindrical, a third communicating channel 1055 is arranged in the tail 1054, and the third communicating channel 1055 penetrates through the first valve cover 105 and is communicated with the interior of the first valve body 100;

the first spring 104 is located inside the first valve body 100, wherein one end of the first spring 104 is sleeved on the limiting portion 1032 of one first valve element 103, and the other end of the first spring 104 is sleeved on the limiting portion 1032 of the other first valve element 103.

When the double-inlet single-outlet check valve 10 is installed, two first valve cores 103 are connected by a first spring 104, the tips of the two first valve cores are downwards placed into the first valve body 100, the first valve core 103 at the tail end slightly protrudes under the support of the first spring 104, and then the center hole 51 of the first valve cover 105 is aligned with the tip of the first valve core 103 and screwed down.

Referring to fig. 6 and 7, there is shown an in-pipe check valve 9 structure, in which the in-pipe check valve 9 includes:

the second valve body 91 is a cylinder, a straight groove 911 is formed in the bottom surface of one end of the second valve body 91, external threads are formed in the outer side wall of the second valve body 91 to be fixedly installed in the second valve installation hole 56, the second valve body 91 is hollow, internal threads are formed in the inner side wall of the other end of the second valve body 91, a boss is formed in the second valve body 91, and a fourth communication channel 912 is formed in the boss and leads to the bottom surface of the second valve body 91;

the second valve cover 92 comprises a circular cover 921 and an end part 922, the circular cover 921 is of a circular cake-shaped structure, external threads are arranged on the outer side wall of the circular cover 921, the external threads on the circular cover 921 are meshed with internal threads on the inner side wall of the other end of the second valve body 91, so that the second valve cover 92 is screwed into the second valve body 91, the end part 922 is cylindrical, and a fifth communication channel 923 is arranged inside the circular cover 921 and the end part 922 and is communicated with the inside of the second valve body 91;

a second valve body 93 provided inside the second valve body 91;

the second spring 94 is sleeved between the second valve spool 93 and the boss inside the second valve body 91.

When the one-way valve 9 in the pipeline is installed, the second spring 94 is firstly sleeved on the bulge at the bottom of the second valve body 91, the cylindrical end of the second valve core 93 is sleeved on the spring, and the central hole 51 of the second valve cover 92 is aligned with the tip of the second valve core 93 and screwed down.

The bottom surface of the pump body 5 is provided with the single-inlet double-outlet check valve and the pipeline internal check valve 9, so that the normal work of each row of plunger assemblies 6 on the side surface of the pump body 5 can be effectively ensured, the pressure of an oil way in the pump body 5 can be effectively controlled, and the flow direction of hydraulic oil can be effectively adjusted.

Referring to fig. 10, there is shown a structure of an auxiliary member including:

the tightening piece 7 is fixedly arranged at a tightening piece placing part 71, the tightening piece 7 is formed by tangency of a cuboid and a circular arc-shaped side face, the diameter of the circular arc-shaped side face is the same as that of the plunger hole, and one side face of the cuboid is provided with a fixing screw hole so as to fix the tightening piece 7 through a tightening screw 11;

and the screwing-assisting sleeve 12 is used for stretching into the pump body 5 to screw the double-inlet single-outlet one-way valve 10 tightly, one end of the screwing-assisting sleeve is provided with a hole with a hexagon-shaped structure, the hole is matched with the screwing part 1053 on the first valve cover 105 in the double-inlet single-outlet one-way valve 10, and the other end of the screwing-assisting sleeve is in a hexagon shape.

The tightening piece 7 with the shape does not influence the normal work of the rear row of plunger cylinders on one hand, and can fix the rear row of plunger cylinders to play a role in fixing.

In this embodiment, when the oil pump works, the eccentric shaft 20 rotates, the front and rear eccentric wheels 21 respectively drive the front and rear rows of plungers to reciprocate, taking a plunger as an example, when oil is discharged, the check valve on the plunger cylinder is closed, oil flows into the double-inlet single-outlet check valve 10 through the plunger oil hole 63 and pushes the valve core 103 open, oil flows in through the oil grooves 1033 on both sides of the valve core, flows out through the opening 102, flows through the relief valve 8 along the oil path, when the pressure exceeds a certain value, the oil flows back into the oil chamber 51 from the outlet of the relief valve 8, the oil with a certain pressure enters the one-way valve 9 in the pipeline, pushes the valve core 103 open, and the oil flows out in one way and finally flows out of the pump body. When oil is absorbed, oil in the oil cavity 51 enters the plunger cylinder body through the filter screen and the one-way valve on the oil inlet grooves 103362 on the two sides of the plunger cylinder body, at the moment, the one-way valve at the oil outlet of the plunger assembly 6 is closed to prevent the oil from being absorbed backwards, and the work of the plunger assemblies 6 is not influenced by the one-way valves.

Other parts which are not specifically described, such as a speed reducer, a motor, a pressure release valve and the like, can be selected from existing products according to needs, can be slightly changed according to actual installation positions, and are not described in detail herein.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims (8)

1. The utility model provides a radial many plungers variable displacement pump of integral type multirow high pressure which characterized in that includes:

the pump body is in an octahedral prism shape, wherein two rows of plunger holes for placing the plunger assemblies and a second through hole are respectively arranged on four side surfaces of the pump body, the plunger holes comprise a front row of plunger holes and a rear row of plunger holes, and the back row of plunger plug holes are internally provided with a holding part of a fastening block, the plunger holes on different sides are communicated through a cavity body in the pump body, a first communication channel is arranged in the pump body between the plunger holes on the same side, and the hole wall of the rear row of plug holes is provided with a third through hole which is communicated with the bottom surface of the pump body, the other two side surfaces of the pump body are provided with relief valve mounting holes which are communicated with the second through hole, one of the other side surfaces of the pump body is provided with an oil inlet hole which is communicated with the cavity inside the pump body, the cavity in the pump body is a cylinder, and the bottom of the cavity is provided with a shaft hole for placing an eccentric shaft bearing and a fixed shaft tail;

the power part is arranged in the pump body;

the control part is arranged in the pump body and used for controlling the flow direction and the oil pressure of the hydraulic oil in the pump body;

the oil tank is arranged at the oil inlet of the pump body and communicated with the pump body;

an auxiliary component.

2. The integrated multi-row high-pressure radial multi-plunger variable displacement pump as claimed in claim 1, wherein the power section comprises an eccentric shaft assembly, a plunger assembly, a pump body oil cavity blocking assembly, a flange plate assembly, a direct current motor and reducer assembly which are sequentially connected and fixed in the pump body, and the plunger assembly comprises a plunger and a plunger sleeve.

3. The integrated multi-row high-pressure radial multi-plunger variable displacement pump of claim 2, wherein the eccentric shaft assembly comprises an eccentric shaft, an eccentric shaft bearing, two eccentrics and a shaft tail, the shaft tail being located at one end of the eccentric shaft;

the eccentric shaft bearing is arranged on the shaft tail;

the two eccentric wheels are arranged on the eccentric shaft, the eccentric directions of the two eccentric wheels are opposite, and the two eccentric wheels are used for driving the plunger to do reciprocating motion;

the other end of the eccentric shaft is connected with the direct current motor and the reducer assembly through a flange plate assembly.

4. An integrated multi-row high-pressure radial multi-plunger variable displacement pump according to claim 2,

the first communication channel is communicated with the front row of plunger holes and the rear row of plunger holes, the first communication channel is communicated with the front row of plunger holes through a small hole, threads are tapped on the inner side wall of the first communication channel, the diameter of the first communication channel is the same as that of the third through hole, and the centers of the first communication channel and the third through hole are located on the same axis.

5. The integrated multi-row high-pressure radial multi-plunger variable displacement pump according to claim 4, wherein the control part comprises a first check valve and a second check valve, the first check valve is a double-inlet single-outlet check valve, the first check valve enters the first communication channel through the third through hole and is meshed with threads on the inner side wall of the first communication channel, the first check valve is arranged between the front row plunger hole and the rear row plunger hole, and the head of the first check valve is communicated with the plunger sleeve in the front row plunger hole and is used for fixing the plunger sleeve and guiding oil;

the second one-way valve is a pipeline one-way valve, a plurality of second valve mounting holes are formed in the bottom surface of the pump body, the second one-way valve is arranged in the second valve mounting holes, and the second valve mounting holes are communicated with each other in the pump body and communicated with the pressure release valve mounting holes.

6. The integrated multi-row high-pressure radial multi-plunger variable displacement pump according to claim 5, wherein the double-in single-out check valve comprises:

the first valve body is a cylinder, the interior of the first valve body is hollow, one end of the first valve body is provided with an external thread, and is provided with a head which is a slender cylinder and passes through the small hole, is communicated with the plunger sleeve in the front row plunger hole, a second communicating channel is arranged in the head part and is communicated with the inside of the first valve body, the other end of the first valve body is provided with internal threads, the side wall of the middle part of the first valve body is provided with an opening, the opening comprises a first arc notch with the arc length equal to the semicircle and a second arc notch with the arc length slightly smaller than the semicircle relative to the first arc notch, the opening is positioned below the second through hole, so that oil in the second through hole flows into the opening, and the sum of the arc length of the projection formed on the opening by the second through hole, the arc length of the first arc notch and the arc length of the second arc notch is greater than the circumference of the first valve body;

the oil-blocking valve comprises a first valve element, a second valve element and a third valve element, wherein two ends of the interior of the first valve element are respectively provided with the first valve element, the first valve element is a cylinder, the side wall of the first valve element is provided with an oil groove, one end of the first valve element is provided with an oil-blocking part, the oil-blocking part is conical, the other end of the first valve element is provided with a limiting part, and the limiting part is in a;

the first valve cover comprises a fixing part, a limiting ring, a screwing part and a tail part, wherein the fixing part is cylindrical, external threads are arranged on the fixing part and are meshed with the internal threads at the other end of the first valve body, the limiting ring is arranged at the tail end of the fixing part and is in a round cake shape, the diameter of the limiting ring is larger than that of the fixing part, the screwing part is in a hexagonal structure, the tail part is cylindrical, a third communicating channel is arranged inside the fixing part, and the third communicating channel penetrates through the first valve cover and is communicated with the inside of the first valve body;

the first spring is positioned in the first valve body, one end of the first spring is sleeved on the limiting part of one first valve core, and the other end of the first spring is sleeved on the limiting part of the other first valve core.

7. The integrated multi-row high-pressure radial multi-plunger variable displacement pump as claimed in claim 5, wherein the in-conduit check valve comprises:

the second valve body is a cylinder, a straight groove is formed in the bottom surface of one end of the second valve body, external threads are arranged on the outer side wall of the second valve body and fixedly mounted in the second valve mounting hole, the second valve body is hollow, internal threads are formed in the inner side wall of the other end of the second valve body, a boss is arranged inside the second valve body, and a fourth communication channel is formed in the boss and leads to the bottom surface of the second valve body; the second valve cover comprises a round cover and an end part, the round cover is of a round cake-shaped structure, external threads are arranged on the outer side wall of the round cover, the external threads on the round cover are meshed with internal threads on the inner side wall of the other end of the second valve body, so that the second valve cover is screwed into the second valve body, the end part is cylindrical, and a fifth communication channel is arranged inside the round cover and the end part and communicated with the inside of the second valve body;

the second valve core is arranged in the second valve body;

the second spring is sleeved between the second valve core and a boss inside the second valve body.

8. The integrated multi-row high-pressure radial multi-plunger variable displacement pump of claim 1, wherein the auxiliary components comprise:

the fastening block is fixedly arranged at the placing part of the fastening block and is formed by tangency of a cuboid and a circular arc-shaped side face, the diameter of the circular arc-shaped side face is the same as that of the plunger piston hole, and one side face of the cuboid is provided with a fixing screw hole for fixing the fastening block through a bolt;

and the screwing-assisting sleeve is used for stretching into the pump body to screw the double-inlet single-outlet one-way valve, one end of the screwing-assisting sleeve is provided with a hole with a hexagon-shaped structure, the hole is matched with a screwing part on the first valve cover in the double-inlet single-outlet one-way valve, and the other end of the screwing-assisting sleeve is in a hexagon shape.

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