CN108716456B - Hydraulic booster pump - Google Patents
Hydraulic booster pump Download PDFInfo
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- CN108716456B CN108716456B CN201810480246.1A CN201810480246A CN108716456B CN 108716456 B CN108716456 B CN 108716456B CN 201810480246 A CN201810480246 A CN 201810480246A CN 108716456 B CN108716456 B CN 108716456B
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- end cover
- oil port
- pilot
- port
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/10—Valves; Arrangement of valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/14—Pistons, piston-rods or piston-rod connections
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B3/00—Intensifiers or fluid-pressure converters, e.g. pressure exchangers; Conveying pressure from one fluid system to another, without contact between the fluids
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Details Of Reciprocating Pumps (AREA)
- Fluid-Pressure Circuits (AREA)
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 is connected in the left end cover in a sliding manner; a main valve hole is formed in the right end cover, a first main oil port, a second main oil port, a third main oil port, a fourth main oil port and a fifth main oil port are formed in the right end cover, and a main valve core is connected in the main valve hole in a sliding mode; an upper main end cover is arranged at the upper end of the main valve hole on the right end cover, and a lower main end cover is arranged at the lower end of the main valve hole; the side surface of the main valve core is provided with a first main shoulder, a second main shoulder, a third main shoulder and a fourth main shoulder, an upper control cavity is formed between the first main shoulder and the upper main end cover, and a lower control cavity is formed between the fourth main shoulder and the lower main 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
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 main valve hole penetrating through the right end cover is arranged in the right end cover along the vertical direction, a first main oil port, a second main oil port, a third main oil port, a fourth main oil port and a fifth main oil port which are communicated with the main valve hole are sequentially arranged in the right end cover from top to bottom, and a main valve core for controlling the on-off of the oil ports is connected in the main valve hole in a sliding manner; an upper main end cover and a lower main end cover are respectively arranged on the right end cover at the upper end and the lower end of the main valve hole; a first main shoulder, a second main shoulder, a third main shoulder and a fourth main shoulder are sequentially arranged on the side surface of the main valve core from top to bottom along the axial direction of the main valve core; an upper control cavity is formed between the first main shoulder and the upper main end cover, and a lower control cavity is formed between the fourth main shoulder and the lower main end cover; when the main valve core is in an upward moving state, the second main oil port is communicated with the third main oil port, and the fourth main oil port is communicated with the fifth main oil port; when the main valve core is in a downward moving state, the first main oil port is communicated with the second main oil port, and the third main oil port is communicated with the fourth main oil port;
a pilot valve hole which is parallel to the main valve hole and penetrates through the right end cover is arranged in the right end cover along the vertical direction, a first pilot oil port, a second pilot oil port and a third pilot oil port which are communicated with the pilot valve hole are sequentially arranged in the right end cover from top to bottom, and a pilot valve core for controlling the on-off of the oil ports is connected in the pilot valve hole in a sliding mode; an upper pilot end cover and a lower pilot end cover are respectively arranged at the upper end and the lower end of the pilot valve hole on the right end cover; a first pilot shoulder and a second pilot shoulder are sequentially arranged on the side surface of the pilot valve core from top to bottom along the axial direction of the pilot valve core; an upper pilot cavity is formed between the first pilot shoulder and the upper pilot end cover, and a lower pilot cavity is formed between the second pilot shoulder and the lower pilot end cover; when the pilot valve core is in an upward moving state, the first pilot oil port is communicated with the second pilot oil port; when the pilot valve core is in a downward moving state, the second pilot oil port is communicated with the third pilot 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 main oil port through a first flow passage arranged in the pump body and the right end cover, the third main oil port is communicated with the second pilot oil port through a tenth flow passage arranged in the right end cover, a first damper is arranged in the tenth flow passage, and an inlet and an outlet of the first damper are respectively communicated with the third main oil port and the second pilot oil port; the T port is communicated with a fifth main 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 main oil port through a third flow passage arranged in the pump body; the first main oil port is communicated with the fifth main oil port through a fourth flow passage arranged in the right end cover, the first pilot oil port is communicated with the first main oil port through a twelfth flow passage arranged in the right end cover, and the third pilot oil port is communicated with the fifth main oil port through a thirteenth flow passage arranged in the right end cover; the upper control cavity is communicated with the twelfth flow channel through an eleventh flow channel arranged in the right end cover, the twelfth flow channel is provided with a second damper, an inlet of the second damper is communicated with the upper control cavity and the first pilot oil port, and an outlet of the second damper is communicated with the first main oil port; the lower control cavity is communicated with the thirteenth flow passage through a fourteenth flow passage arranged in the right end cover, the thirteenth flow passage is provided with a third damper, an inlet of the third damper is communicated with the lower control cavity and the third pilot oil port, and an outlet of the third damper is communicated with the fifth main oil port;
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 main valve core and the pilot valve core to move up and down.
Through the technical scheme, when the hydraulic booster pump works, the initial position of a piston is positioned at the leftmost side, a main valve core is positioned in an upward moving state, a pilot valve core is positioned in a downward 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 output oil port of a booster pump, 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 main oil port, a second main oil port and a third flow passage, and meanwhile the oil of the port P flows into a lower control cavity through the first flow passage, the third main oil port, a tenth flow passage, a second pilot oil port, a third pilot oil port, a thirteenth flow passage and a fourteenth flow passage, so that the main valve core is kept; because the piston is positioned at the leftmost position, the pressure of the port P can be gradually increased, so that the overflow valve assembly is opened, the main valve core moves downwards to enable the first main oil port to be communicated with the second main oil port, the third main oil port is communicated with the fourth main oil port, so that oil in the port P enters the high-pressure cavity through the oil inlet check valve assembly, acts on the plunger to further 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 second main oil port, the first main oil port, the fourth flow passage and the fifth oil injection port, and the high-pressure cavity finishes liquid filling in the process; when the piston moves to the right end, the pressure of the P port gradually rises to open the overflow valve assembly, the main valve core moves upwards to enable the second main oil port to be communicated with the third main oil port, the fourth main oil port is communicated with the fifth main oil port, so that oil in the P port enters the right piston control cavity through the first flow passage, the third main oil port, the second main 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 in a pressurizing mode due to the fact that the diameter of the piston is larger than that of the plunger, and the oil in the P port flows into the lower control cavity through the first flow passage, the third main oil port, the tenth flow passage, the second pilot oil port, the third pilot oil port, the thirteenth flow passage and the fourteenth flow passage to enable the main valve core to keep moving upwards; 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 main 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 lower pilot 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 main 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 upper pilot cavity through a ninth flow passage arranged in the right end cover; a fifteenth flow passage used for communicating the seventh flow passage with the fifth main oil port and a sixteenth flow passage used for communicating the ninth flow passage with the first main oil port are arranged in the right end cover; a fourth damper is arranged in the fifteenth flow passage, and an inlet and an outlet of the fourth damper are respectively communicated with the seventh flow passage and the fifth main oil port; and a fifth damper is arranged in the sixteenth flow passage, and an inlet and an outlet of the fifth damper are respectively communicated with the ninth flow passage and the first main oil 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 a piston is positioned at the leftmost side, a main valve core is positioned in an upward moving state, a pilot valve core is positioned in a downward moving state, a port P is connected with pressure oil of a low-pressure oil circuit, a port T is directly connected with an oil tank, a port H is an output oil port of the booster pump, when 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 main oil port, a second main oil port and a third flow passage, and meanwhile, the oil of the port P flows into a lower control cavity through the first flow passage, the third main oil port, a tenth flow passage, a second pilot oil port, a third pilot oil port, a thirteenth flow passage and a fourteenth flow passage, so that the main valve core is; because the piston is positioned at the leftmost position, the pressure of the port P can be gradually increased, so that the overflow valve assembly is opened, the main valve core moves downwards to enable the first main oil port to be communicated with the second main oil port, the third main oil port is communicated with the fourth main oil port, so that oil in the port P enters the high-pressure cavity through the oil inlet check valve assembly, acts on the plunger to further 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 second main oil port, the first main oil port, the fourth flow passage and the fifth oil injection port, and the high-pressure cavity finishes liquid filling in the process; when the piston moves to the right end, the pressure of the P port gradually rises to open the overflow valve assembly, the main valve core moves upwards to enable the second main oil port to be communicated with the third main oil port, the fourth main oil port is communicated with the fifth main oil port, so that oil in the P port enters the right piston control cavity through the first flow passage, the third main oil port, the second main 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 in a pressurizing mode due to the fact that the diameter of the piston is larger than that of the plunger, and the oil in the P port flows into the lower control cavity through the first flow passage, the third main oil port, the tenth flow passage, the second pilot oil port, the third pilot oil port, the thirteenth flow passage and the fourteenth flow passage to enable the main valve core to keep moving upwards; 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. 1;
fig. 4 is a schematic cross-sectional view taken at D-D in fig. 3.
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 main valve hole 401 penetrating through the right end cover 4 is arranged in the vertical direction, a first main oil port 4.1, a second main oil port 4.2, a third main oil port 4.3, a fourth main oil port 4.4 and a fifth main oil port 4.5 which are communicated with the main valve hole 401 are sequentially arranged in the right end cover 4 from top to bottom, and a main valve core 6 for controlling the on-off of the oil ports is slidably connected in the main valve hole 401; an upper main end cover 7 and a lower main end cover 8 are respectively arranged at the upper end and the lower end of the main valve hole 401 on the right end cover 4; a first main shoulder 601, a second main shoulder 602, a third main shoulder 603 and a fourth main shoulder 604 are sequentially arranged on the side surface of the main valve element 6 from top to bottom along the axial direction; an upper control chamber 4a is formed between the first main shoulder 601 and the upper main end cover 7, and a lower control chamber 4b is formed between the fourth main shoulder 604 and the lower main end cover 8; when the main valve core 6 is in an upward moving state, the second main oil port 4.2 is communicated with the third main oil port 4.3, and the fourth main oil port 4.4 is communicated with the fifth main oil port 4.5; when the main valve core 6 is in a downward moving state, the first main oil port 4.1 is communicated with the second main oil port 4.2, and the third main oil port 4.3 is communicated with the fourth main oil port 4.4.
A pilot valve hole 402 which is parallel to the main valve hole 401 and penetrates through the right end cover 4 is vertically arranged in the right end cover 4, a first pilot oil port 4.1a, a second pilot oil port 4.2a and a third pilot oil port 4.3a which are communicated with the pilot valve hole 402 are sequentially arranged in the right end cover 4 from top to bottom, and a pilot valve core 9 for controlling the on-off of the oil ports is slidably connected in the pilot valve hole 402; an upper pilot end cover 10 and a lower pilot end cover 11 are respectively arranged at the upper end and the lower end of the pilot valve hole 402 on the right end cover 4; a first pilot shoulder 901 and a second pilot shoulder 902 are sequentially arranged on the side surface of the pilot valve core 9 from top to bottom along the axial direction of the pilot valve core; an upper pilot cavity 4c is formed between the first pilot shoulder 901 and the upper pilot end cover 10, and a lower pilot cavity 4d is formed between the second pilot shoulder 902 and the lower pilot end cover 11; when the pilot valve core 9 is in an upward moving state, the first pilot oil port 4.1a is communicated with the second pilot oil port 4.2 a; when the pilot valve core 9 is in a downward moving state, the second pilot oil port 4.2a is communicated with the third pilot oil port 4.3 a.
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 main oil port 4.3 through a first flow passage 1.1 arranged in the pump body 1 and the right end cover 4, the third main oil port 4.3 is communicated with the second pilot oil port 4.2a through a tenth flow passage 1.10 arranged in the right end cover 4, a first damper 20 is arranged in the tenth flow passage 1.10, and an inlet and an outlet of the first damper 20 are respectively communicated with the third main oil port 4.3 and the second pilot oil port 4.2 a; the T port is communicated with a fifth main 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 main oil port 4.2 through a third flow passage 1.3 arranged in the pump body 1; the first main oil port 4.1 is communicated with the fifth main oil port 4.5 through a fourth flow passage 1.4 arranged in the right end cover 4; the first pilot oil port 4.1a is communicated with the first main oil port 4.1 through a twelfth flow passage 1.12 arranged in the right end cover 4, and the third pilot oil port 4.3a is communicated with the fifth main oil port 4.5 through a thirteenth flow passage 1.13 arranged in the right end cover 4; the upper control cavity 4a is communicated with the twelfth flow channel 1.12 through an eleventh flow channel 1.11 arranged in the right end cover 4, the twelfth flow channel 1.12 is provided with a second damper 21, an inlet of the second damper 21 is communicated with the upper control cavity 4a and the first pilot oil port 4.1a, and an outlet of the second damper is communicated with the first main oil port 4.1; the lower control cavity 4b is communicated with the thirteenth flow passage 1.13 through a fourteenth flow passage 1.14 arranged in the right end cover 4, the thirteenth flow passage 1.13 is provided with a third damper 23, an inlet of the third damper 23 is communicated with the lower control cavity 4b and the third pilot oil port 4.3a, and an outlet of the third damper is communicated with the fifth main oil port 4.5.
The port P is communicated with the high-pressure cavity 2a through an oil inlet check valve assembly 12 arranged in the left end cover 2, and an oil inlet and an oil outlet of the oil inlet check valve assembly 12 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 13 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 13 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 for controlling the main valve core 6 and the pilot valve core 9 to move up and down.
The overflow valve assembly comprises a first overflow valve 14 and a second overflow valve 15, an oil inlet of the first overflow valve 14 is communicated with the second main 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 14 is communicated with the lower pilot cavity 4d through a seventh flow passage 1.7 arranged in the right end cover 4; an oil inlet of the second overflow valve 15 is communicated with the fourth main 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 15 is communicated with the upper pilot chamber 4c through a ninth flow passage 1.9 arranged in the right end cover 4; a fifteenth flow passage 1.15 for communicating the seventh flow passage 1.7 with the fifth main oil port 4.5 and a sixteenth flow passage 1.16 for communicating the ninth flow passage 1.9 with the first main oil port 4.1 are arranged in the right end cover 4; a fourth damper 24 is arranged in the fifteenth flow passage 1.15, and an inlet and an outlet of the fourth damper 24 are respectively communicated with the seventh flow passage 1.7 and the fifth main oil port 4.5; a fifth damper 25 is arranged in the sixteenth flow passage 1.16, and an inlet and an outlet of the fifth damper 25 are respectively communicated with the ninth flow passage 1.9 and the first main oil port 4.1.
When the hydraulic control valve is applied, a port P is connected with low-pressure oil way pressure oil, a port T is directly connected with an oil tank, a port H is an oil outlet of a booster pump, the initial position of a piston 3 is positioned at the leftmost side, a main valve element 6 is positioned in an upward moving state, a pilot valve element 9 is positioned in a downward moving state, after the port P is filled with oil, the oil of the port P enters a right piston control cavity 1b through a first flow passage 1.1, a third main oil port 4.3, a second main oil port 4.2 and a third flow passage 1.3, and meanwhile the oil of the port P flows into a lower control cavity 4b through a first flow passage 1.1, a third main oil port 4.3, a tenth flow passage 1.10, a second pilot oil port 4.2a, a third pilot oil port 4.3a, a thirteenth flow passage 1.13 and a fourteenth flow passage 1.14, so that the main valve element 6 keeps the upward moving; because the piston is located at the leftmost position, the pressure of the port P gradually rises, so that the first overflow valve 14 is opened, oil of the port P enters the lower pilot chamber 4d through the first flow passage 1.1, the third main oil port 4.3, the second main oil port 4.2, the sixth flow passage 1.6, the first overflow valve 14 and the seventh flow passage 1.7, so that the pilot spool 9 moves upward, and the oil in the upper pilot chamber 4c flows into the first main oil port 4.1 through the ninth flow passage 1.9 and the sixteenth flow passage 1.16 and then flows back to the port T; after the pilot valve spool 9 moves upwards, oil in the port P enters the upper control chamber 4a through the first flow passage 1.1, the third main oil port 4.3, the tenth flow passage 1.10, the second pilot oil port 4.2a, the first pilot oil port 4.1a, the twelfth flow passage 1.12 and the eleventh flow passage 1.11, so that the main valve spool 6 moves downwards, oil in the lower control chamber 4b flows back to the port T through the fourteenth flow passage 1.14, the thirteenth flow passage 1.13 and the fifth main oil port 4.5, the main valve spool 6 moves downwards so that the first main oil port 4.1 is communicated with the second main oil port 4.2, the third main oil port 4.3 is communicated with the fourth main oil port 4.4, so that the oil in the port P enters the high pressure chamber 2a through the oil inlet check valve assembly 12 to act on the plunger 5 to push the plunger 5 to move rightwards, and the oil in the right piston control chamber 1b flows to the fifth flow passage 4.3, the second main oil port 4.2, the first main oil port 4.1, the fourth main oil port 4.1, the fifth flow passage 4.5 and the T, in the process, the high-pressure cavity 2a is filled with liquid; after the piston 3 moves to the right end, the pressure of the port P gradually rises, so that the second overflow valve 15 is opened, oil of the port P enters the upper pilot chamber 4c through the first flow passage 1.1, the third main oil port 4.3, the fourth main oil port 4.4, the eighth flow passage 1.8, the second overflow valve 15 and the ninth flow passage 1.9, so that the pilot spool 9 moves downward, and the oil in the lower pilot chamber 4d flows into the fifth main oil port 4.5 through the seventh flow passage 1.7 and the fifteenth flow passage 1.15 and then flows back to the port T; after the pilot valve spool 9 moves downwards, oil in the port P flows into the lower control chamber 4b through the first flow passage 1.1, the third main oil port 4.3, the tenth flow passage 1.10, the second pilot oil port 4.2a, the third pilot oil port 4.3a, the thirteenth flow passage 1.13 and the fourteenth flow passage 1.14, the main valve spool 6 moves upwards to enable the second main oil port 4.2 and the third main oil port 4.3 to be communicated, the fourth main oil port 4.4 and the fifth main oil port 4.5 to be communicated, so that the oil in the port P flows into the right piston control chamber 1b through the first flow passage 1.1, the third main oil port 4.3, the second main oil port 4.2 and the third flow passage 1.3, and since the diameter of the piston 3 is larger than that of the plunger 5, the piston 3 pushes the plunger 5 to move leftwards to discharge the oil in the high-pressure chamber 2a through the oil outlet check valve 13, and discharge from the H port, 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 (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 main valve hole penetrating through the right end cover is arranged in the right end cover along the vertical direction, a first main oil port, a second main oil port, a third main oil port, a fourth main oil port and a fifth main oil port which are communicated with the main valve hole are sequentially arranged in the right end cover from top to bottom, and a main valve core for controlling the on-off of the oil ports is connected in the main valve hole in a sliding manner; an upper main end cover and a lower main end cover are respectively arranged on the right end cover at the upper end and the lower end of the main valve hole; a first main shoulder, a second main shoulder, a third main shoulder and a fourth main shoulder are sequentially arranged on the side surface of the main valve core from top to bottom along the axial direction of the main valve core; an upper control cavity is formed between the first main shoulder and the upper main end cover, and a lower control cavity is formed between the fourth main shoulder and the lower main end cover; when the main valve core is in an upward moving state, the second main oil port is communicated with the third main oil port, and the fourth main oil port is communicated with the fifth main oil port; when the main valve core is in a downward moving state, the first main oil port is communicated with the second main oil port, and the third main oil port is communicated with the fourth main oil port;
a pilot valve hole which is parallel to the main valve hole and penetrates through the right end cover is arranged in the right end cover along the vertical direction, a first pilot oil port, a second pilot oil port and a third pilot oil port which are communicated with the pilot valve hole are sequentially arranged in the right end cover from top to bottom, and a pilot valve core for controlling the on-off of the oil ports is connected in the pilot valve hole in a sliding mode; an upper pilot end cover and a lower pilot end cover are respectively arranged at the upper end and the lower end of the pilot valve hole on the right end cover; a first pilot shoulder and a second pilot shoulder are sequentially arranged on the side surface of the pilot valve core from top to bottom along the axial direction of the pilot valve core; an upper pilot cavity is formed between the first pilot shoulder and the upper pilot end cover, and a lower pilot cavity is formed between the second pilot shoulder and the lower pilot end cover; when the pilot valve core is in an upward moving state, the first pilot oil port is communicated with the second pilot oil port; when the pilot valve core is in a downward moving state, the second pilot oil port is communicated with the third pilot 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 main oil port through a first flow passage arranged in the pump body and the right end cover, the third main oil port is communicated with the second pilot oil port through a tenth flow passage arranged in the right end cover, a first damper is arranged in the tenth flow passage, and an inlet and an outlet of the first damper are respectively communicated with the third main oil port and the second pilot oil port; the T port is communicated with a fifth main 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 main oil port through a third flow passage arranged in the pump body; the first main oil port is communicated with the fifth main oil port through a fourth flow passage arranged in the right end cover, the first pilot oil port is communicated with the first main oil port through a twelfth flow passage arranged in the right end cover, and the third pilot oil port is communicated with the fifth main oil port through a thirteenth flow passage arranged in the right end cover; the upper control cavity is communicated with the twelfth flow channel through an eleventh flow channel arranged in the right end cover, the twelfth flow channel is provided with a second damper, an inlet of the second damper is communicated with the upper control cavity and the first pilot oil port, and an outlet of the second damper is communicated with the first main oil port; the lower control cavity is communicated with the thirteenth flow passage through a fourteenth flow passage arranged in the right end cover, the thirteenth flow passage is provided with a third damper, an inlet of the third damper is communicated with the lower control cavity and the third pilot oil port, and an outlet of the third damper is communicated with the fifth main oil port;
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 main valve core and the pilot 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 main 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 lower pilot 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 main 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 upper pilot cavity through a ninth flow passage arranged in the right end cover;
a fifteenth flow passage used for communicating the seventh flow passage with the fifth main oil port and a sixteenth flow passage used for communicating the ninth flow passage with the first main oil port are arranged in the right end cover; a fourth damper is arranged in the fifteenth flow passage, and an inlet and an outlet of the fourth damper are respectively communicated with the seventh flow passage and the fifth main oil port; and a fifth damper is arranged in the sixteenth flow passage, and an inlet and an outlet of the fifth damper are respectively communicated with the ninth flow passage and the first main oil port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480246.1A CN108716456B (en) | 2018-05-18 | 2018-05-18 | Hydraulic booster pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480246.1A CN108716456B (en) | 2018-05-18 | 2018-05-18 | Hydraulic booster pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108716456A CN108716456A (en) | 2018-10-30 |
| CN108716456B true CN108716456B (en) | 2019-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810480246.1A Active CN108716456B (en) | 2018-05-18 | 2018-05-18 | Hydraulic booster pump |
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| Country | Link |
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| CN (1) | CN108716456B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111271238A (en) * | 2020-02-04 | 2020-06-12 | 陈少同 | Submersible pump |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117118A (en) * | 1994-08-23 | 1996-02-21 | 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 |
| JP2011064166A (en) * | 2009-09-18 | 2011-03-31 | Advics Co Ltd | Piston pump |
| CN205806047U (en) * | 2016-06-16 | 2016-12-14 | 宁波汉商液压有限公司 | A kind of single-acting automatic reciprocating type supercharger |
-
2018
- 2018-05-18 CN CN201810480246.1A patent/CN108716456B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1117118A (en) * | 1994-08-23 | 1996-02-21 | 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 |
| JP2011064166A (en) * | 2009-09-18 | 2011-03-31 | Advics Co Ltd | Piston pump |
| CN205806047U (en) * | 2016-06-16 | 2016-12-14 | 宁波汉商液压有限公司 | A kind of single-acting automatic reciprocating type supercharger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108716456A (en) | 2018-10-30 |
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Effective date of registration: 20191128 Address after: 315000 Dongqian Lake Tourist Resort, Ningbo City, Zhejiang Province 228 South Mozi Road Applicant after: Ningbo Qian Hu oil equipment Co., Ltd Address before: 523000 Dongguan City, Guangdong Province, Songshan Lake High-tech Industrial Development Zone Headquarters, No. 2, No. 1 District, No. 2, No. 201 Applicant before: Dongguan hate Paavo Hydraulic Technology Co., Ltd. |
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