CN108757431B - Hydraulic booster pump - Google Patents

Hydraulic booster pump Download PDF

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Publication number
CN108757431B
CN108757431B CN201810479345.8A CN201810479345A CN108757431B CN 108757431 B CN108757431 B CN 108757431B CN 201810479345 A CN201810479345 A CN 201810479345A CN 108757431 B CN108757431 B CN 108757431B
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China
Prior art keywords
oil
port
cover
valve
control
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Application number
CN201810479345.8A
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Chinese (zh)
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CN108757431A (en
Inventor
邵玉刚
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Jiangsu salt state Pump Manufacturing Co., Ltd.
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Jiangsu Salt State Pump Manufacturing Co Ltd
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Priority to CN201810479345.8A priority Critical patent/CN108757431B/en
Publication of CN108757431A publication Critical patent/CN108757431A/en
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Publication of CN108757431B publication Critical patent/CN108757431B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/10Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
    • 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
    • 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

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; the upper end of the valve hole is provided with an upper end cover on the right end cover, and the lower end of the valve hole is provided with a lower end cover; a first shoulder, a second shoulder, a third shoulder and a fourth shoulder are sequentially arranged on the side surface of the valve core from top to bottom, an upper control cavity is formed between the first shoulder and the upper end cover, and a lower control cavity is formed between the third shoulder and the lower end cover; a hydraulic control one-way valve component used 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; the upper end of the valve hole is provided with an upper end cover on the right end cover, and the lower end of the valve hole is provided with a lower end cover; a first shoulder, a second shoulder, a third shoulder and a fourth shoulder are sequentially arranged on the side surface of the valve core from top to bottom, an upper control cavity is formed between the first shoulder and the upper end cover, and a lower control cavity is formed between the fourth shoulder and the lower end cover; when the valve core is in an upward 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; when the valve core is in a downward 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;
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 port T is communicated with the fifth oil port through a second flow passage arranged in the pump body and the right end cover; the right piston control cavity is communicated with the second 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 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 and a hydraulic control one-way valve assembly which are used 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 a piston is located at the leftmost side, a valve core is located at the upward moving state, a port P is connected with pressure oil of a low-pressure oil way, a port T is directly connected with an oil tank, a port H is an oil outlet of a booster pump, when the port P is filled with the oil, the oil of the port P enters a right piston control cavity through a first flow passage, a third oil port, a second oil port and a third flow passage, the pressure of the port P can be gradually increased due to the fact that the piston is located at the leftmost position, an overflow valve assembly and a hydraulic control one-way valve assembly are opened, the valve core moves downwards to enable the first oil port to be communicated with the second oil port and the third oil port to be communicated with a fourth oil port, and accordingly the oil of the port P enters a high-pressure cavity through an oil inlet one-way valve assembly to act on a plunger to further push the plunger to move right, The hydraulic control valve comprises a fifth oil port and a second flow passage, wherein a high-pressure cavity finishes liquid filling in the process, meanwhile, oil in a P port reaches a fourth oil port through a first flow passage and a third oil port, when a piston moves to the right end, the pressure of the P port gradually rises to open an overflow valve assembly and a hydraulic control check valve assembly, a valve core moves upwards to enable the second oil port to be communicated with the third oil port, and the fourth oil port is communicated with a fifth oil port, so that the oil in the P port flows into a right piston control cavity through the first flow passage, the third oil port, the second oil port and a third flow passage, and the piston pushes a plunger to move leftwards to discharge the oil in the high-pressure cavity through an oil outlet check valve and an H port in a pressurization mode because the diameter of the piston is larger than that of a plunger; 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 second 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 through a seventh flow passage arranged in the right end cover; an oil inlet of the second overflow valve is communicated with the fourth 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 the lower control cavity through a ninth flow passage arranged in the right end cover.
In a further technical scheme, the hydraulic control one-way valve assembly comprises a first hydraulic control one-way valve and a second hydraulic control one-way valve, an oil inlet of the first hydraulic control one-way valve is communicated with the upper control cavity through a tenth flow passage arranged in the right end cover, an oil return port of the first hydraulic control one-way valve is communicated with the T port, and a control oil port of the first hydraulic control one-way valve is communicated with the lower control cavity through an eleventh flow passage arranged in the right end cover; an oil inlet of the second hydraulic control one-way valve is communicated with the lower control cavity through the eleventh flow passage, an oil return port of the second hydraulic control one-way valve is communicated with the T port, and a control oil port of the second hydraulic control one-way valve is communicated with the upper control cavity through the tenth flow passage.
In a further technical scheme, the first hydraulic control one-way valve and the second hydraulic control one-way valve are identical valve pieces and comprise a valve sleeve inserted into the right end cover and a gland used for pressing the valve sleeve into the right end cover; a first installation cavity, a second installation cavity and a through flow hole for communicating the first installation cavity with the second installation cavity are sequentially arranged in the valve sleeve from bottom to top along the length direction of the valve sleeve; an oil return hole communicated with the first mounting cavity and an oil inlet hole communicated with the second mounting cavity are formed in the side face of the valve sleeve, close to the through-flow hole, and a control oil hole communicated with the first mounting cavity is formed in the lower end of the valve sleeve along the axial direction of the valve sleeve; a control valve core for controlling the on-off of the through hole and a control spring for forcing the control valve core to move towards the through hole are arranged in the second mounting cavity, one end of the control spring is abutted against the control valve core, and the other end of the control spring is abutted against the pressing cover; and a control piston matched with the control valve core and used for controlling the on-off of the through-flow hole is slidably connected in the first mounting cavity.
(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 a piston is positioned at the leftmost side, a valve core is positioned in an upward moving state, a port P is connected with low-pressure oil circuit pressure oil, a port T is directly connected with an oil tank, a port H is an oil outlet of a booster pump, after the port P is filled with oil, oil in the port P enters a right piston control cavity through a first flow passage, a third oil port, a second oil port and a third flow passage, the pressure of the port P is gradually increased due to the fact that the piston is positioned at the leftmost side, an overflow valve assembly and a hydraulic control one-way valve assembly are opened, the valve core moves downwards to enable the first oil port to be communicated with the second oil port, the third oil port is communicated with a fourth oil port, the oil in the port P enters a high-pressure cavity through an oil inlet one-way valve assembly and acts on a plunger to push the plunger to move rightwards, and the oil in the right piston control cavity passes through the, The hydraulic control valve assembly comprises a first flow passage, a first hydraulic control check valve assembly, a valve core, a second flow passage, a T port, a piston, a plunger and a hydraulic control check valve assembly, wherein the first flow passage is communicated with the first hydraulic control check valve assembly; 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 taken at C-C in FIG. 2;
fig. 4 is a schematic structural diagram of the first pilot-operated check valve in this embodiment.
Detailed Description
Referring to fig. 1-4, 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; an upper end cover 7 is arranged at the upper end of the valve hole 401 on the right end cover 4, and a lower end cover 8 is arranged at the lower end of the valve hole 401; a first shoulder 601, a second shoulder 602, a third shoulder 603 and a fourth shoulder 604 are sequentially arranged on the side surface of the valve core 6 from top to bottom, an upper control cavity 4a is formed between the first shoulder 601 and the upper end cover 7, and a lower control cavity 4b is formed between the fourth shoulder 604 and the lower end cover 8; when the valve core 6 is in an upward 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; when the valve core 6 is in a downward 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.
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 port T is communicated with the fifth oil port 4.5 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 second oil port 4.2 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 port P is communicated with the high-pressure cavity 2a through an oil inlet check valve assembly 9 arranged in the left end cover 2, and an oil inlet and an oil outlet of the oil inlet check valve assembly 9 are respectively communicated with the port P and the high-pressure cavity 2 a; an H port for discharging pressure oil in the high-pressure cavity 2a is formed in the left end cover 2, an oil outlet one-way valve 10 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 10 are respectively communicated with the high-pressure cavity 2a and the H port; 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 and a hydraulic control one-way valve assembly for controlling the valve core 6 to move up and down.
The overflow valve assembly comprises a first overflow valve 11 and a second overflow valve 12, an oil inlet of the first overflow valve 11 is communicated with the second oil port 4.2 through a sixth flow passage 1.6 arranged in the right end cover 4, and an oil outlet of the first overflow valve 11 is communicated with the upper control cavity 4a through a seventh flow passage 1.7 arranged in the right end cover 4; an oil inlet of the second overflow valve 12 is communicated with the fourth oil port 4.4 through an eighth flow passage 1.8 arranged in the right end cover 4, and an oil outlet of the second overflow valve 12 is communicated with the lower control chamber 4b through a ninth flow passage 1.9 arranged in the right end cover 4.
The hydraulic control one-way valve assembly comprises a first hydraulic control one-way valve 13a and a second hydraulic control one-way valve 14a, an oil inlet of the first hydraulic control one-way valve 13a is communicated with the upper control cavity 4a through a tenth flow passage 1.10 arranged in the right end cover 4, an oil return port of the first hydraulic control one-way valve 13a is communicated with the T port, and a control oil port of the first hydraulic control one-way valve 13a is communicated with the lower control cavity 4b through an eleventh flow passage 1.11 arranged in the right end cover 4; an oil inlet of the second hydraulic control one-way valve 14a is communicated with the lower control cavity 4b through the eleventh flow passage 1.11, an oil return port of the second hydraulic control one-way valve 14a is communicated with the T port, and a control oil port of the second hydraulic control one-way valve 14a is communicated with the upper control cavity 4a through the tenth flow passage 1.10.
the first hydraulic control one-way valve 13a and the second hydraulic control one-way valve 14a are identical valve elements and comprise a valve sleeve 14 inserted into the right end cover 4 and a gland 15 for pressing the valve sleeve 14 into the right end cover 4; a first installation cavity 1401 and a second installation cavity 1402 and a through flow hole 1403 used for communicating the first installation cavity 1401 and the second installation cavity 1402 are sequentially arranged in the valve sleeve 14 from bottom to top along the length direction of the valve sleeve; an oil return hole 1404 communicated with the first mounting cavity 1401 and an oil inlet hole 1405 communicated with the second mounting cavity 1402 are formed in the side face of the valve sleeve 14, close to the through-flow hole 1403, and a control oil hole 1406 communicated with the first mounting cavity 1401 is formed in the lower end of the valve sleeve 14 along the axial direction of the valve sleeve; a control valve core 16 for controlling the on-off of the through hole 1403 and a control spring 17 for forcing the control valve core 16 to move towards the through hole 1403 are arranged in the second mounting cavity 1402, one end of the control spring 17 is abutted against the control valve core 16, and the other end of the control spring is abutted against the gland 15; a control piston 18 which is matched with the control valve core 16 and is used for controlling the on-off of the through-flow hole 1403 is connected in the first installation cavity 1401 in a sliding mode.
When in application, the port P of the invention is connected with the pressure oil of the low-pressure oil circuit, the port T is directly connected with the oil tank, the port H is the oil outlet of the booster pump, the initial position of the piston 3 is positioned at the leftmost side in the figure 1, the valve core 6 is positioned at the upward moving state, after the port P is filled with oil, the oil liquid 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 second oil port 4.2 and the third flow passage 1.3, because the piston 3 is located at the leftmost position, the pressure of the port P gradually rises, so that the first overflow valve 11 is opened, the pressure oil of the second port 4.2 enters the upper control cavity 4a through the sixth flow passage 1.6 and the seventh flow passage 1.7, the valve core 6 is pushed to move downwards, at the same time, the pressure oil in the upper control chamber 4a flows into the control port of the second hydraulic check valve 14a through the tenth flow passage 1.10, the second hydraulic control one-way valve 14a is opened, and the oil liquid in the lower control cavity 4b flows back to the T port through the second hydraulic control one-way valve 14 a; the valve core 6 moves downwards 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, so that oil of the port P enters the high-pressure cavity 2a through the oil inlet check valve assembly 9 and acts on the plunger 5 to push the plunger 5 to move rightwards, the oil in the right piston control cavity 1b passes through the third flow passage 1.3, the second oil port 4.2, the first oil port 4.1, the fourth flow passage 1.4, the fifth oil port 4.5 and the second flow passage 1.2, the oil in the high-pressure cavity 2a finishes liquid filling in the process, meanwhile, the oil of the port P reaches the fourth oil port 4.4 through the first flow passage 1.1 and the third oil port 4.3, after the piston 3 moves to the right end, the pressure of the port P gradually rises, the second overflow valve 12 is opened, the oil of the fourth oil port 4.4 flows into the lower control cavity 4b through the eighth flow passage 1.8 and the ninth flow passage 1.9 to push the valve core 6 to move upwards, and the eleven one-way control oil port 13.4 a in the lower control valve, the first hydraulic control one-way valve 13a is opened, and the oil in the upper control cavity 4a flows back to the T port through the first hydraulic control one-way valve 13 a; the valve core 6 moves upwards to enable the second oil port 4.2 to be communicated with the third oil port 4.3, the fourth oil port 4.4 to be communicated with the fifth oil port 4.5, so that oil of the port P flows into the right piston control cavity 1b through the first flow channel 1.1, the third oil port 4.3, the second oil port 4.2 and the third flow channel 1.3, and the piston 3 pushes the plunger 5 to move leftwards to discharge the oil of the high-pressure cavity 2a from the H port through the oil outlet one-way valve 10 due to the fact that the diameter of the piston 3 is larger than that of the plunger 5, and the process is a pressurization process; 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 (4)

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; the upper end of the valve hole is provided with an upper end cover on the right end cover, and the lower end of the valve hole is provided with a lower end cover; a first shoulder, a second shoulder, a third shoulder and a fourth shoulder are sequentially arranged on the side surface of the valve core from top to bottom, an upper control cavity is formed between the first shoulder and the upper end cover, and a lower control cavity is formed between the fourth shoulder and the lower end cover; when the valve core is in an upward 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; when the valve core is in a downward 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;
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 port T is communicated with the fifth oil port through a second flow passage arranged in the pump body and the right end cover; the right piston control cavity is communicated with the second 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 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 and a hydraulic control one-way valve assembly which are used for controlling the valve core to move up and down.
2. the hydraulic booster pump of claim 1, wherein the relief valve assembly includes a first relief valve and a second relief valve, an oil inlet of the first relief valve communicates with the second oil port through a sixth flow passage provided in the right end cover, and an oil outlet of the first relief valve communicates with the upper control chamber through a seventh flow passage provided in the right end cover; an oil inlet of the second overflow valve is communicated with the fourth 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 the lower control cavity through a ninth flow passage arranged in the right end cover.
3. The hydraulic booster pump of claim 1, wherein the hydraulic control check valve assembly comprises a first hydraulic control check valve and a second hydraulic control check valve, an oil inlet of the first hydraulic control check valve is communicated with the upper control cavity through a tenth flow passage arranged in the right end cover, an oil return port of the first hydraulic control check valve is communicated with the T port, and a control oil port of the first hydraulic control check valve is communicated with the lower control cavity through an eleventh flow passage arranged in the right end cover; an oil inlet of the second hydraulic control one-way valve is communicated with the lower control cavity through the eleventh flow passage, an oil return port of the second hydraulic control one-way valve is communicated with the T port, and a control oil port of the second hydraulic control one-way valve is communicated with the upper control cavity through the tenth flow passage.
4. The hydraulic booster pump of claim 3, wherein the first hydraulic control one-way valve and the second hydraulic control one-way valve are identical valve pieces and each comprise a valve sleeve inserted into the right end cover and a gland used for compressing the valve sleeve into the right end cover; a first installation cavity, a second installation cavity and a through flow hole for communicating the first installation cavity with the second installation cavity are sequentially arranged in the valve sleeve from bottom to top along the length direction of the valve sleeve; an oil return hole communicated with the first mounting cavity and an oil inlet hole communicated with the second mounting cavity are formed in the side face of the valve sleeve, close to the through-flow hole, and a control oil hole communicated with the first mounting cavity is formed in the lower end of the valve sleeve along the axial direction of the valve sleeve; a control valve core for controlling the on-off of the through hole and a control spring for forcing the control valve core to move towards the through hole are arranged in the second mounting cavity, one end of the control spring is abutted against the control valve core, and the other end of the control spring is abutted against the pressing cover; and a control piston matched with the control valve core and used for controlling the on-off of the through-flow hole is slidably connected in the first mounting cavity.
CN201810479345.8A 2018-05-18 2018-05-18 Hydraulic booster pump Active CN108757431B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810479345.8A CN108757431B (en) 2018-05-18 2018-05-18 Hydraulic booster pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810479345.8A CN108757431B (en) 2018-05-18 2018-05-18 Hydraulic booster pump

Publications (2)

Publication Number Publication Date
CN108757431A CN108757431A (en) 2018-11-06
CN108757431B true CN108757431B (en) 2019-12-17

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CN110894830A (en) * 2019-12-30 2020-03-20 宁波文泽机电技术开发有限公司 Booster water pump
CN111075683A (en) * 2019-12-30 2020-04-28 宁波真格液压科技有限公司 Reciprocating plunger pump
CN111075685A (en) * 2019-12-30 2020-04-28 黄洪刚 Compact air compressor
CN111075686A (en) * 2019-12-30 2020-04-28 宁波文泽机电技术开发有限公司 Air compressor

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CN1063830C (en) * 1994-08-23 2001-03-28 刘恩兆 Hydraulic automatically-controlled reciprocating pump
CN201057181Y (en) * 2007-10-27 2008-05-07 常德信诚液压有限公司 Balancing brake valve
JP5471229B2 (en) * 2009-09-18 2014-04-16 株式会社アドヴィックス Piston pump
CN204610163U (en) * 2015-04-23 2015-09-02 宁波恒力液压股份有限公司 Double steering constant-pressure variable axial piston pump

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