CN108612681B - Hydraulic booster pump - Google Patents

Hydraulic booster pump Download PDF

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Publication number
CN108612681B
CN108612681B CN201810479373.XA CN201810479373A CN108612681B CN 108612681 B CN108612681 B CN 108612681B CN 201810479373 A CN201810479373 A CN 201810479373A CN 108612681 B CN108612681 B CN 108612681B
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oil
port
cover
communicated
valve
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CN201810479373.XA
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CN108612681A (en
Inventor
邵玉刚
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Bengbu Zhengbu Compressor Co., Ltd.
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BENGBU ZHENGBU COMPRESSOR Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B3/00Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors

Abstract

The invention discloses a hydraulic booster pump, which comprises a pump body, wherein a piston is connected in the pump body in a sliding manner, a left end cover is arranged at the left end of the pump body, and a right end cover is arranged at the right end of the pump body; a plunger connected with the piston is connected in the left end cover in a sliding manner; a valve hole is formed in the right end cover along the vertical direction, a first oil port, a second oil port, a third oil port, a fourth oil port and a fifth oil port are sequentially formed in the right end cover from top to bottom, and a valve core is connected in the valve hole in a sliding mode; a plunger hole is arranged in the right end cover, and a control plunger is connected in the plunger hole in a sliding manner; a first shoulder, a second shoulder and a third shoulder are arranged on the side surface of the valve core; an upper end cover is installed at the upper end of the valve hole, an upper control cavity is formed between the first shoulder and the upper end cover, and a lower control cavity is formed between the lower end of the control plunger and the lower end of the plunger hole; an overflow valve assembly for controlling the valve core to move up and down is also arranged in the right end cover; the booster pump is simple in structure and does not need electric control.

Description

Hydraulic booster pump
Technical Field
The invention relates to the technical field of booster pumps, in particular to a hydraulic booster pump capable of reliably and automatically and continuously boosting pressure.
Background
The hydraulic booster pump is an ultrahigh pressure hydraulic component for amplifying hydraulic pressure by utilizing the principle that the action areas of two ends of a piston are different and the stress sizes are the same, and the hydraulic booster pump can increase the low-pressure to 200MPa or above. At present, the traditional hydraulic booster pump adopted domestically is continuously reversed through an electromagnetic reversing valve, the reciprocating motion of the booster pump is controlled to continuously output high pressure, the structure is complex, a complex displacement sensor and an electric control component need to be arranged, the size and the weight are large, the carrying is inconvenient, the traditional hydraulic booster pump is difficult to adopt in flammable and explosive occasions and portable machinery, for example, a natural gas compression substation, a garbage compression station, an oil mine, coal injection and the like have explosion-proof requirements, and the hydraulic booster pump can meet the requirements of self reversing and explosion-proof without close-distance intervention of personnel.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects in the prior art and provides the hydraulic booster pump which is simple in structure, convenient to process and capable of reliably and automatically and continuously boosting pressure.
(II) technical scheme
In order to achieve the purpose, the invention provides a hydraulic booster pump, which comprises a pump body, wherein the inside of the pump body is connected with a piston in a sliding manner, a left end cover is arranged at the left end of the pump body, and a right end cover is arranged at the right end of the pump body; a mounting hole communicated with the pump body is formed in the left end cover along the horizontal direction, and a plunger connected with the piston is connected in the mounting hole in a sliding manner; a left piston control cavity is formed between the left end of the piston and the left end cover, a right piston control cavity is formed between the right end of the piston and the right end cover, and a high-pressure cavity is formed between the left end of the mounting hole and the left end of the plunger;
a valve hole is formed in the right end cover along the vertical direction, a first oil port, a second oil port, a third oil port, a fourth oil port and a fifth oil port which are communicated with the valve hole are sequentially formed in the right end cover from top to bottom, and a valve core for controlling the on-off of the oil ports is connected in the valve hole in a sliding mode; a plunger piston hole communicated with the valve hole is formed in the lower end of the valve hole in the right end cover, and a control plunger piston coaxial with the valve core is connected in the plunger piston hole in a sliding mode; the cross-sectional area of the control plunger is smaller than that of the valve core; a first shoulder, a second shoulder and a third shoulder are sequentially arranged on the side surface of the valve core from top to bottom along the axial direction of the valve core; an upper end cover is installed at the upper end of the valve hole, an upper control cavity is formed between the first shoulder and the upper end cover, an oil return cavity is formed between the third shoulder and the lower end of the valve hole, and a lower control cavity is formed between the lower end of the control plunger and the lower end of the plunger hole; when the valve core is in an upward moving state, the first oil port is communicated with the second oil port, and the third oil port is communicated with the fourth oil port; when the valve core is in a downward moving state, the second oil port is communicated with the third oil port, and the fourth oil port is communicated with the fifth oil port;
a hydraulic control unloading valve component for controlling the unloading of the upper control cavity is arranged in the right end cover;
a P port and a T port are formed in the side face of the pump body; the port P is communicated with the third oil port through a first flow passage arranged in the pump body and the right end cover, and the third oil port is communicated with the lower control cavity through a tenth flow passage arranged in the right end cover; the T port is communicated with a fifth oil port and an oil return cavity through a second flow passage arranged in the pump body and the right end cover; the right piston control cavity is communicated with the fourth oil port through a third flow passage arranged in the pump body; the first oil port is communicated with the fifth oil port through a fourth flow passage arranged in the right end cover; the second oil port is communicated with the upper control cavity through an eleventh flow passage arranged in the right end cover, a damper is arranged in the eleventh flow passage, and an inlet and an outlet of the damper are respectively communicated with the second oil port and the upper control cavity;
the P port is communicated with the high-pressure cavity through an oil inlet one-way valve assembly arranged in the left end cover, and an oil inlet and an oil outlet of the oil inlet one-way valve assembly are respectively communicated with the P port and the high-pressure cavity; an H port for discharging pressure oil in the high-pressure cavity is formed in the left end cover, an oil outlet one-way valve is mounted at the H port in the left end cover, and an oil inlet and an oil outlet of the oil outlet one-way valve are respectively communicated with the high-pressure cavity and the H port;
a fifth flow channel for communicating the T port with the left piston control cavity is arranged in the pump body;
and the right end cover is also provided with an overflow valve assembly for controlling the valve core to move up and down.
According to the technical scheme, when the hydraulic booster pump works, the initial position of the piston is located at the leftmost side, the valve core is located in the upward moving state, the port P is connected with low-pressure oil circuit pressure oil, the port T is directly connected with an oil tank, the port H is a booster pump output oil port, when the port P is filled with oil, oil of the port P enters the right piston control cavity through the first flow passage, the third oil port, the fourth oil port and the third flow passage, and meanwhile the oil of the port P enters the lower control cavity through the first flow passage, the third oil port and the tenth flow passage, so that the valve core keeps the upward moving state; because the piston is positioned at the leftmost position, the pressure of the P port can be gradually increased, so that the overflow valve assembly is opened, the oil liquid of the P port enters the upper control cavity, and because the cross-sectional area of the valve core is larger than that of the control plunger, the valve core starts to move downwards under the action of the resultant force, and meanwhile, the oil liquid in the oil return cavity flows back to the T port through the second flow passage; the valve core moves downwards to enable the second oil port to be communicated with the third oil port, the fourth oil port is communicated with the fifth oil port, so that oil of the port P enters the high-pressure cavity through the oil inlet check valve assembly, acts on the plunger to push the plunger to move rightwards, the oil in the right piston control cavity flows to the port T through the third flow passage, the fourth oil port, the fifth oil port and the second flow passage, the high-pressure cavity finishes liquid filling in the process, and meanwhile, the oil of the port P enters the upper control cavity through the first flow passage, the third oil port, the second oil port and the eleventh flow passage to enable the valve core to keep a downward moving state; when the piston moves to the right end, the pressure of the P port gradually rises to open the overflow valve assembly, the valve core moves upwards to enable the first oil port to be communicated with the second oil port, and the third oil port is communicated with the fourth oil port, so that oil in the P port enters the right piston control cavity through the first flow passage, the third oil port, the fourth oil port and the third flow passage, the piston pushes the plunger to move leftwards to discharge the oil in the high-pressure cavity from the H port through the oil outlet one-way valve due to the fact that the diameter of the piston is larger than that of the plunger, the process is a pressurization process, and meanwhile the oil in the P port enters the lower control cavity through the first flow passage, the third oil port and the tenth flow passage to enable the valve core to keep an upward moving; when the piston moves to the initial position at the left end, the cycle process is started, and as long as oil enters from the port P, the piston moves and supercharges in a reciprocating manner without electric control; the hydraulic booster pump is simple in structure and convenient to process, and can be suitable for working conditions with explosion-proof requirements.
In a further technical scheme, the overflow valve assembly comprises a first overflow valve and a second overflow valve, an oil inlet of the first overflow valve is communicated with the fourth oil port through a sixth flow passage arranged in the right end cover, and an oil outlet of the first overflow valve is communicated with the upper control cavity and an oil inlet of the hydraulic control unloading valve assembly through a seventh flow passage arranged in the right end cover; an oil inlet of the second overflow valve is communicated with the second oil port through an eighth flow passage arranged in the right end cover, and an oil outlet of the second overflow valve is communicated with a control oil port of the hydraulic control unloading valve assembly through a ninth flow passage arranged in the right end cover; and an oil outlet of the hydraulic control unloading valve assembly is communicated with the T port.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
when the hydraulic booster pump works, the initial position of the piston is positioned at the leftmost side, the valve core is positioned in an upward moving state, the port P is connected with low-pressure oil circuit pressure oil, the port T is directly connected with an oil tank, the port H is a booster pump output oil port, after the port P is filled with oil, oil of the port P enters a right piston control cavity through a first flow passage, a third oil port, a fourth oil port and a third flow passage, and meanwhile, the oil of the port P enters a lower control cavity through the first flow passage, the third oil port and a tenth flow passage, so that the valve core keeps the upward moving state; because the piston is positioned at the leftmost position, the pressure of the P port can be gradually increased, so that the overflow valve assembly is opened, the oil liquid of the P port enters the upper control cavity, and because the cross-sectional area of the valve core is larger than that of the control plunger, the valve core starts to move downwards under the action of the resultant force, and meanwhile, the oil liquid in the oil return cavity flows back to the T port through the second flow passage; the valve core moves downwards to enable the second oil port to be communicated with the third oil port, the fourth oil port is communicated with the fifth oil port, so that oil of the port P enters the high-pressure cavity through the oil inlet check valve assembly, acts on the plunger to push the plunger to move rightwards, the oil in the right piston control cavity flows to the port T through the third flow passage, the fourth oil port, the fifth oil port and the second flow passage, the high-pressure cavity finishes liquid filling in the process, and meanwhile, the oil of the port P enters the upper control cavity through the first flow passage, the third oil port, the second oil port and the eleventh flow passage to enable the valve core to keep a downward moving state; when the piston moves to the right end, the pressure of the P port gradually rises to open the overflow valve assembly, the valve core moves upwards to enable the first oil port to be communicated with the second oil port, and the third oil port is communicated with the fourth oil port, so that oil in the P port enters the right piston control cavity through the first flow passage, the third oil port, the fourth oil port and the third flow passage, the piston pushes the plunger to move leftwards to discharge the oil in the high-pressure cavity from the H port through the oil outlet one-way valve due to the fact that the diameter of the piston is larger than that of the plunger, the process is a pressurization process, and meanwhile the oil in the P port enters the lower control cavity through the first flow passage, the third oil port and the tenth flow passage to enable the valve core to keep an upward moving; when the piston moves to the initial position at the left end, the cycle process is started, and as long as oil enters from the port P, the piston moves and supercharges in a reciprocating manner without electric control; the hydraulic booster pump is simple in structure and convenient to process, and can be suitable for working conditions with explosion-proof requirements.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic booster pump in the present embodiment;
FIG. 2 is a schematic cross-sectional view taken along line B-B of FIG. 1;
fig. 3 is a schematic cross-sectional view at C-C in fig. 2.
Detailed Description
Referring to fig. 1-3, the invention provides a hydraulic booster pump, which comprises a pump body 1, a piston 3 is connected in the pump body 1 in a sliding manner, a left end cover 2 is installed at the left end of the pump body 1, and a right end cover 4 is installed at the right end of the pump body 1; a mounting hole 201 communicated with the pump body 1 is formed in the left end cover 2 along the horizontal direction, and a plunger 5 connected with the piston 3 is connected in the mounting hole 201 in a sliding manner; a left piston control cavity 1a is formed between the left end of the piston 3 and the left end cover 2, a right piston control cavity 1b is formed between the right end of the piston 3 and the right end cover 4, and a high-pressure cavity 2a is formed between the left end of the mounting hole 201 and the left end of the plunger 5.
A valve hole 401 is formed in the right end cover 4 along the vertical direction, a first oil port 4.1, a second oil port 4.2, a third oil port 4.3, a fourth oil port 4.4 and a fifth oil port 4.5 which are communicated with the valve hole 401 are sequentially formed in the right end cover 4 from top to bottom, and a valve core 6 for controlling the on-off of the oil ports is connected in the valve hole 401 in a sliding mode; a plunger hole 402 communicated with the valve hole 401 is formed in the lower end of the valve hole 401 in the right end cover 4, and a control plunger 7 coaxial with the valve core 6 is connected in the plunger hole 402 in a sliding manner; the cross-sectional area of the control plunger 7 is smaller than that of the valve core 6; a first shoulder 6.1, a second shoulder 6.2 and a third shoulder 6.3 are sequentially arranged on the side surface of the valve core 6 along the axial direction of the valve core from top to bottom; an upper end cover 8 is installed at the upper end of the valve hole 401, an upper control cavity 4a is formed between the first shoulder 6.1 and the upper end cover 8, an oil return cavity 4b is formed between the third shoulder 6.3 and the lower end of the valve hole 401, and a lower control cavity 4c is formed between the lower end of the control plunger 7 and the lower end of the plunger hole 402; when the valve core 6 is in an upward moving state, the first oil port 4.1 is communicated with the second oil port 4.2, and the third oil port 4.3 is communicated with the fourth oil port 4.4; when the valve core 6 is in a downward moving state, the second oil port 4.2 is communicated with the third oil port 4.3, and the fourth oil port 4.4 is communicated with the fifth oil port 4.5. And a hydraulic control unloading valve assembly 9 for controlling the unloading of the upper control cavity 4a is arranged in the right end cover 4.
A P port and a T port are formed in the side face of the pump body 1; the port P is communicated with the third oil port 4.3 through a first flow passage 1.1 arranged in the pump body 1 and the right end cover 4, and the third oil port 4.3 is communicated with the lower control cavity 4c through a tenth flow passage 1.10 arranged in the right end cover 4; the T port is communicated with a fifth oil port 4.5 and an oil return cavity 4b through a second flow passage 1.2 arranged in the pump body 1 and the right end cover 4; the right piston control cavity 1b is communicated with the fourth oil port 4.4 through a third flow passage 1.3 arranged in the pump body 1; the first oil port 4.1 is communicated with the fifth oil port 4.5 through a fourth flow passage 1.4 arranged in the right end cover 4; the second oil port 4.2 is communicated with the upper control cavity 4a through an eleventh flow passage 1.11 arranged in the right end cover 4, a damper 10 is arranged in the eleventh flow passage 1.11, and an inlet and an outlet of the damper 10 are respectively communicated with the second oil port 4.2 and the upper control cavity 4 a.
The port P is communicated with the high-pressure cavity 2a through an oil inlet check valve assembly 11 arranged in the left end cover 2, and an oil inlet and an oil outlet of the oil inlet check valve assembly 11 are respectively communicated with the port P and the high-pressure cavity 2 a; an H port used for discharging pressure oil in the high-pressure cavity 2a is formed in the left end cover 2, an oil outlet one-way valve 12 is installed at the H port in the left end cover 2, and an oil inlet and an oil outlet of the oil outlet one-way valve 12 are communicated with the high-pressure cavity 2a and the H port respectively. A fifth flow channel 1.5 for communicating the T port with the left piston control cavity 1a is arranged in the pump body 1; and the right end cover 4 is also provided with an overflow valve assembly for controlling the valve core 6 to move up and down.
The overflow valve assembly comprises a first overflow valve 13 and a second overflow valve 14, an oil inlet of the first overflow valve 13 is communicated with the fourth oil port 4.4 through a sixth flow passage 1.6 arranged in the right end cover 4, and an oil outlet of the first overflow valve 13 is communicated with the upper control cavity 4a and an oil inlet of the hydraulic control unloading valve assembly 9 through a seventh flow passage 1.7 arranged in the right end cover 4; an oil inlet of the second overflow valve 14 is communicated with the second oil port 4.2 through an eighth flow passage 1.8 arranged in the right end cover 4, and an oil outlet of the second overflow valve 14 is communicated with a control oil port of the hydraulic control unloading valve assembly 9 through a ninth flow passage 1.9 arranged in the right end cover 4; an oil outlet of the hydraulic control unloading valve assembly 9 is communicated with the T port.
When the hydraulic control valve is applied, the port P is connected with pressure oil of a low-pressure oil way, the port T is directly connected with an oil tank, the port H is an oil outlet of a booster pump, the initial position of a piston 3 is positioned at the leftmost side in the figure 1, a valve core 6 is positioned in an upward moving state, after the port P is filled with oil, oil of the port P enters a right piston control cavity 1b through a first flow passage 1.1, a third oil port 4.3, a fourth oil port 4.4 and a third flow passage 1.3, and meanwhile, the oil of the port P enters a lower control cavity 4c through a first flow passage 1.1, a third oil port 4.3 and a tenth flow passage 1.10, so that the valve core 6 keeps in the upward moving state; because the piston 3 is positioned at the leftmost position, the pressure of the port P is gradually increased, so that the first overflow valve 13 is opened, the oil liquid of the port P enters the upper control cavity 4a through the first flow passage 1.1, the third oil port 4.3, the fourth oil port 4.4, the sixth flow passage 1.6, the first overflow valve 13 and the seventh flow passage 1.7, and because the cross-sectional area of the valve core 6 is larger than that of the control plunger 7,
therefore, the valve core 6 starts to move downwards under the action of the resultant force, and simultaneously, the oil in the oil return cavity 4b flows back to the oil port T through the second flow passage 1.2; the valve core 6 moves downwards to enable the second oil port 4.2 to be communicated with the third oil port 4.3, the fourth oil port 4.4 is communicated with the fifth oil port 4.5, so that oil in the port P enters the high-pressure cavity 2a through the oil inlet check valve assembly 11 and acts on the plunger 5 to push the plunger 5 to move rightwards, the oil in the right piston control cavity 1b flows to the port T through the third flow passage 1.3, the fourth oil port 4.4, the fifth oil port 4.5 and the second flow passage 1.2, the high-pressure cavity 2a finishes liquid filling in the process, and meanwhile, the oil in the port P enters the upper control cavity 4a through the first flow passage 1.1, the third oil port 4.3, the second oil port 4.2 and the eleventh flow passage 1.11 to enable the valve core 6 to keep a downward moving state; after the piston 3 moves to the right end, the pressure of the P port gradually rises, so that the second overflow valve 14 is opened, the oil of the P port enters the control oil port of the hydraulic control unloading valve assembly 9 through the first flow passage 1.1, the third oil port 4.3, the second oil port 4.2, the eighth flow passage 1.8, the second overflow valve 14 and the ninth flow passage 1.9, so that the hydraulic control unloading valve assembly 9 is opened, and the pressure oil in the upper control cavity 4a flows to the T port through the seventh flow passage 1.7, the oil inlet of the hydraulic control unloading valve assembly 9 and the oil outlet of the hydraulic control unloading valve assembly 9; meanwhile, oil of the port P enters the lower control cavity 4c through the first flow passage 1.1, the third oil port 4.3 and the tenth flow passage 1.10, so that the valve core 6 is pushed to move upwards to enable the first oil port 4.1 to be communicated with the second oil port 4.2, the third oil port 4.3 is communicated with the fourth oil port 4.4, therefore, the oil of the port P enters the right piston control cavity 1b through the first flow passage 1.1, the third oil port 4.3, the fourth oil port 4.4 and the third flow passage 1.3, the piston 3 pushes the plunger 5 to move leftwards to discharge the oil of the high pressure cavity 2a from the port H through the oil outlet one-way valve 12 due to the fact that the diameter of the piston 3 is larger than that of the plunger 5, the process is a pressurization process, and meanwhile, the oil of the port P enters the lower control cavity 4c through the first flow passage 1.1, the third oil port 4.3 and the tenth flow passage 1.10, so that the valve core 6 keeps moving upwards; when the piston 3 moves to the initial position at the left end, the circulation process is started, and as long as oil enters from the port P, the piston 3 moves and supercharges in a reciprocating manner without electric control; the hydraulic booster pump is simple in structure and convenient to process, and can be suitable for working conditions with explosion-proof requirements.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (2)

1. The hydraulic booster pump is characterized by comprising a pump body, wherein a piston is connected to the pump body in a sliding manner, a left end cover is installed at the left end of the pump body, and a right end cover is installed at the right end of the pump body; a mounting hole communicated with the pump body is formed in the left end cover along the horizontal direction, and a plunger connected with the piston is connected in the mounting hole in a sliding manner; a left piston control cavity is formed between the left end of the piston and the left end cover, a right piston control cavity is formed between the right end of the piston and the right end cover, and a high-pressure cavity is formed between the left end of the mounting hole and the left end of the plunger;
a valve hole is formed in the right end cover along the vertical direction, a first oil port, a second oil port, a third oil port, a fourth oil port and a fifth oil port which are communicated with the valve hole are sequentially formed in the right end cover from top to bottom, and a valve core for controlling the on-off of the oil ports is connected in the valve hole in a sliding mode; a plunger piston hole communicated with the valve hole is formed in the lower end of the valve hole in the right end cover, and a control plunger piston coaxial with the valve core is connected in the plunger piston hole in a sliding mode; the cross-sectional area of the control plunger is smaller than that of the valve core; a first shoulder, a second shoulder and a third shoulder are sequentially arranged on the side surface of the valve core from top to bottom along the axial direction of the valve core; an upper end cover is installed at the upper end of the valve hole, an upper control cavity is formed between the first shoulder and the upper end cover, an oil return cavity is formed between the third shoulder and the lower end of the valve hole, and a lower control cavity is formed between the lower end of the control plunger and the lower end of the plunger hole; when the valve core is in an upward moving state, the first oil port is communicated with the second oil port, and the third oil port is communicated with the fourth oil port; when the valve core is in a downward moving state, the second oil port is communicated with the third oil port, and the fourth oil port is communicated with the fifth oil port;
a hydraulic control unloading valve component for controlling the unloading of the upper control cavity is arranged in the right end cover;
a P port and a T port are formed in the side face of the pump body; the port P is communicated with the third oil port through a first flow passage arranged in the pump body and the right end cover, and the third oil port is communicated with the lower control cavity through a tenth flow passage arranged in the right end cover; the T port is communicated with a fifth oil port and an oil return cavity through a second flow passage arranged in the pump body and the right end cover; the right piston control cavity is communicated with the fourth oil port through a third flow passage arranged in the pump body; the first oil port is communicated with the fifth oil port through a fourth flow passage arranged in the right end cover; the second oil port is communicated with the upper control cavity through an eleventh flow passage arranged in the right end cover, a damper is arranged in the eleventh flow passage, and an inlet and an outlet of the damper are respectively communicated with the second oil port and the upper control cavity;
the P port is communicated with the high-pressure cavity through an oil inlet one-way valve assembly arranged in the left end cover, and an oil inlet and an oil outlet of the oil inlet one-way valve assembly are respectively communicated with the P port and the high-pressure cavity; an H port for discharging pressure oil in the high-pressure cavity is formed in the left end cover, an oil outlet one-way valve is mounted at the H port in the left end cover, and an oil inlet and an oil outlet of the oil outlet one-way valve are respectively communicated with the high-pressure cavity and the H port;
a fifth flow channel for communicating the T port with the left piston control cavity is arranged in the pump body;
and the right end cover is also provided with an overflow valve assembly for controlling the valve core to move up and down.
2. The hydraulic booster pump of claim 1, wherein the relief valve assembly comprises a first relief valve and a second relief valve, an oil inlet of the first relief valve is communicated with the fourth oil port through a sixth flow passage arranged in the right end cover, and an oil outlet of the first relief valve is communicated with the upper control chamber and an oil inlet of the hydraulic control unloading valve assembly through a seventh flow passage arranged in the right end cover; an oil inlet of the second overflow valve is communicated with the second oil port through an eighth flow passage arranged in the right end cover, and an oil outlet of the second overflow valve is communicated with a control oil port of the hydraulic control unloading valve assembly through a ninth flow passage arranged in the right end cover; and an oil outlet of the hydraulic control unloading valve assembly is communicated with the T port.
CN201810479373.XA 2018-05-18 2018-05-18 Hydraulic booster pump Active CN108612681B (en)

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Publication number Priority date Publication date Assignee Title
CN109611305B (en) * 2018-12-01 2020-02-21 东营盛昶石油机械有限公司 Booster water pump

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