CN109611305B - Booster water pump - Google Patents
Booster water pump Download PDFInfo
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- CN109611305B CN109611305B CN201811460961.5A CN201811460961A CN109611305B CN 109611305 B CN109611305 B CN 109611305B CN 201811460961 A CN201811460961 A CN 201811460961A CN 109611305 B CN109611305 B CN 109611305B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 177
- 239000011148 porous material Substances 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 239000003921 oil Substances 0.000 description 36
- 239000010720 hydraulic oil Substances 0.000 description 6
- 238000012864 cross contamination Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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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
- 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
- F04B9/111—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 with two mechanically connected pumping members
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/002—Hydraulic systems to change the pump delivery
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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
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/22—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by means of valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Multiple-Way Valves (AREA)
Abstract
The invention discloses a pump shell with an axial pore passage, wherein a P oil port and a T oil port which are communicated with the axial pore passage are formed in the side wall of the pump shell; the hydraulic cylinder comprises a left cylinder body with a left large plunger cavity and a left small plunger cavity, and a right cylinder body with a right large plunger cavity and a right small plunger cavity; the T-shaped piston is provided with an axial channel and is arranged in the pump shell and can slide left and right; the diameter of the large valve core is larger than that of the valve port, and the large valve core is positioned on the left side of the second annular inner shoulder and is connected in the axial channel of the piston in a sliding manner; the left end of the axial channel of the piston is provided with a left big plunger, and the right end of the axial channel of the piston is provided with a right big plunger; a left small plunger is mounted on the left end face of the piston, and a right small plunger is mounted on the right end face of the piston; a left variable control valve component and a right variable control valve component are arranged in the left cylinder body; the booster water pump is simple in structure and can achieve variable booster ratio.
Description
Technical Field
The invention relates to the technical field of water pumps, in particular to a booster water pump.
Background
The booster water pump is an important high-pressure water source providing element widely applied to the fields of water cutting, high-pressure cleaning and the like, the existing booster water pump is generally a fixed booster ratio, different booster ratios are generally required in different working conditions in practical application, for example, at a middle-low pressure stage, the pressure of a water outlet is not high, the required flow is large, and the required pressure can be achieved only by a small booster ratio; in the high-pressure stage, the pressure of the water outlet is higher, the flow of the water outlet is smaller, and the required pressure can be reached only by a larger pressure increasing ratio. In the prior application, a water pump with a large pressure ratio and a water pump with a small pressure ratio are mostly adopted to be matched for use, so that the control is complex, the installed power is high, and the use cost is high.
Disclosure of Invention
Technical problem to be solved
The invention aims to overcome the defects in the prior art and provides the booster water pump with compact volume, low cost and variable booster ratio.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a booster water pump comprises a pump shell with an axial hole passage, wherein a P oil port and a T oil port which are communicated with the axial hole passage are formed in the side wall of the pump shell;
the pump comprises a left cylinder body with a left large plunger cavity and a left small plunger cavity, and a right cylinder body with a right large plunger cavity and a right small plunger cavity, wherein the left cylinder body and the right cylinder body are respectively connected to the left end and the right end of an axial pore channel of a pump shell; the left cylinder body is provided with a left water inlet and a left water outlet communicated with the left large plunger cavity, and the right cylinder body is provided with a right water inlet and a right water outlet communicated with the right large plunger cavity;
the left cylinder body is provided with a left valve hole communicated with the left large plunger cavity and a left second valve hole communicated with the left small plunger cavity, and the left valve hole and the left second valve hole are both communicated with the left water inlet hole; a left water inlet valve which only allows water to enter the left large plunger cavity from the left water inlet hole is arranged in the left first valve hole, and a left second water inlet valve which only allows water to enter the left small plunger cavity from the left water inlet hole is arranged in the left second valve hole; the left cylinder body is provided with a left three-valve hole communicated with the left small plunger cavity, and the left three-valve hole is communicated with the left water outlet hole; a left drain valve only allowing water to be discharged from the left large plunger cavity is arranged in the left water outlet hole, and a left drain valve only allowing water to be discharged from the left small plunger cavity is arranged in the left three valve hole; the right cylinder body is provided with a right valve hole communicated with the right large plunger cavity and a right two valve holes communicated with the right small plunger cavity, and the right valve hole and the right two valve holes are both communicated with the right water inlet hole; a right water inlet valve which only allows water to enter the right large plunger cavity from the right water inlet hole is arranged in the right valve hole, and a right two water inlet valves which only allows water to enter the right small plunger cavity from the right water inlet hole are arranged in the right valve hole; the right cylinder body is provided with a right three-valve hole communicated with the right small plunger cavity, and the right three-valve hole is communicated with the right water outlet hole; a right water discharge valve only allowing water to be discharged from the right large plunger cavity is arranged in the right water outlet hole, and a right two water discharge valve only allowing water to be discharged from the right small plunger cavity is arranged in the right three valve hole;
the piston is provided with an axial channel and is in a T shape, the piston is arranged in the pump shell and can slide left and right, a thin shaft part of the piston is in sealing fit with the inner peripheral wall of a first annular inner shoulder, a first sealing ring is arranged between the periphery of a large shaft part of the piston and the inner hole wall of the pump shell, a left piston cavity is formed between the left side of the large shaft part of the piston and the first annular inner shoulder, a right piston cavity is formed on the right side of the large shaft part of the piston, an oil return cavity is formed on the left side of the thin shaft part of the piston, a P oil port is communicated with the left piston cavity, a T oil port is communicated with the oil return cavity, a second annular inner shoulder is arranged on the inner peripheral wall of the axial channel of the piston, the second annular inner shoulder is encircled to form a valve port, a first through hole, a second through hole and a third through hole are formed in the thin shaft part of the piston, the first through hole, the inlet end of the third through hole is positioned in the valve port, and the number of the outlet ends of the third through hole is three, wherein one outlet end is a first outlet end which is always communicated with the right piston cavity, the other outlet end is a second outlet end which is selected to be communicated with the oil return cavity or the left piston cavity, and the third outlet end is a third outlet end which is always communicated with the axial channel at the left end of the second annular inner shoulder;
the diameter of the large valve core is larger than that of the valve port, the large valve core is positioned on the left side of the second annular inner shoulder and is connected in an axial channel of the piston in a sliding manner, the left and right sliding of the large valve core can determine whether to open the left port of the valve port, the small valve core is in a T shape, the large head part of the small valve core is positioned on the right side of the second annular inner shoulder, the thin shaft part of the small valve core penetrates through the valve port and then is in threaded connection with the large valve core, and the left and right sliding of the large head part of the small valve core can determine whether to open the;
the left end of the axial channel of the piston is provided with a left large plunger which is connected in a sliding manner in the left large plunger cavity, and the right end of the axial channel of the piston is provided with a right large plunger which is connected in a sliding manner in the right large plunger cavity; a left small plunger slidably connected in the left small plunger cavity is mounted on the left end face of the piston, and a right small plunger slidably connected in the right small plunger cavity is mounted on the right end face of the piston;
a left variable control valve component used for controlling the flow and the pressure in the left water outlet hole is installed in the left cylinder body, and a right variable control valve component used for controlling the flow and the pressure in the left water outlet hole is installed in the right cylinder body.
According to the technical scheme, when the booster water pump works, the P oil port is connected with the hydraulic oil high-pressure oil port, the T oil port is directly connected with the hydraulic oil tank, the left-right reciprocating motion of the piston is controlled by controlling oil supply to the P oil port, so that the left large plunger and the left small plunger at the left end of the piston are driven to respectively reciprocate in the left large plunger cavity and the left small plunger cavity, and water enters the left large plunger cavity and the left small plunger cavity from the left water inlet hole and is discharged at high pressure from the left water outlet hole through the matching of the left water inlet valve, the left water outlet valve, the left water inlet valve and the left water outlet valve; meanwhile, a right large plunger and a right small plunger which are positioned at the right end of the piston are driven to respectively reciprocate in a right large plunger cavity and a right small plunger cavity, and water enters the right large plunger cavity and the right small plunger cavity from a right water inlet hole and is then discharged from a right water outlet hole at high pressure through the matching of a right water inlet valve, a right water discharge valve, a right water inlet valve and a right water discharge valve; when the pressure of the left water outlet hole reaches a preset pressure, the left variable control valve assembly works to realize unloading of the left large plunger cavity, and water flow in the left large plunger cavity cannot be discharged from the left water outlet hole; in a similar way, when the pressure of the right water outlet hole reaches the preset pressure, the right variable control valve assembly works to realize unloading of the right large plunger cavity, and water flow in the right large plunger cavity cannot be discharged from the right water outlet hole; the discharge capacity of the booster water pump is reduced, and the water pressure of the corresponding left water outlet hole and the right water outlet hole is increased.
The reciprocating motion control of the piston is completed by a large valve core and a small valve core, the diameter of the large valve core is larger than that of the valve port, a thin shaft part of the small valve core penetrates through the valve port and then is in threaded connection with the large valve core, the left and right slippage of the large head part of the small valve core can determine whether the right port of the valve port is opened or not, and the left and right slippage of the large valve core can determine whether the left port of the valve port is opened or not.
When the small valve core opens the right port of the valve port, oil can enter the right piston cavity after passing through the P oil port, the first through-flow hole and the third through-flow hole, the oil in the right piston cavity acts on the annular area formed by the piston and the right plunger (the annular area is larger than the annular area formed by the shoulder part of the piston), the piston moves leftwards under the area difference, when the piston moves from right to left to the second outlet end of the third through-flow hole to be communicated with the oil return cavity, the left end cavity of the big valve core is communicated with the oil return port through the second outlet end of the third through-flow hole, the small valve core moves leftwards to close the right port of the valve port, the big valve core opens the left port of the valve port, so that the right piston cavity is communicated with the oil return cavity after passing through the left port and the second through-flow hole of the valve port, and then flows to the T oil port, so that the piston starts moving rightwards, when the piston, the large valve core and the small valve core move rightwards together under the action of the area difference (the diameter of the large valve core is larger than that of the valve port), the left port of the valve port is closed again by the large valve core, and the right port of the valve port is opened again by the small valve core, so that the piston starts to move leftwards to form a cycle.
In a further technical scheme, the left variable control valve assembly comprises a left control valve core, a left spring and a left pressure sensitive plunger; a left threaded hole communicated with the left water inlet hole is formed in the left cylinder body along the axial direction of the left valve hole, a left four valve holes are formed in the bottom of the left threaded hole along the axial direction of the left threaded hole, and a left step is formed between the left threaded hole and the left four valve holes; the bottom of the left four valve holes is provided with a left five valve holes along the axial direction; a left first through flow hole and a left second through flow hole are formed in the left cylinder body, one end of the left first through flow hole is communicated with the bottom of the left five-valve hole, and the other end of the left first through flow hole is communicated with the left three-valve hole; one end of the left second through flow hole is communicated with the left four valve holes, and the other end of the left second through flow hole is communicated with the left first valve hole;
the left control valve core is connected in a left four-valve hole in a sliding mode, a left shoulder is arranged at one end, located in a left threaded hole, of the left control valve core, a left annular through-flow groove is formed in the circumferential side face of the left control valve core and close to a left two-through-flow hole, the left shoulder and a left first step are matched to control the connection and disconnection of the left threaded hole and the left four-valve hole, the left pressure sensitive plunger is connected in a left five-valve hole in a sliding mode, and the diameter of the left pressure sensitive plunger is smaller than that of the left control valve core; the left spring is positioned between the left plug and the left control valve core and used for forcing the left shoulder to be pressed on the left step.
Through the technical scheme, when the left variable control valve component works, the pressure of a left water outlet hole acts on the left pressure sensitive plunger through the left three-valve hole, the left through-flow hole and the left five-valve hole to push the left control valve core to move towards the left plug direction by overcoming the acting force of the left spring and drive the left shoulder to leave the left step, so that the water in the corresponding left large plunger cavity flows back into the left water inlet hole through the left one-valve hole, the left two-flow hole, the left four-valve hole, the left annular through-flow groove and the left threaded hole; therefore, the corresponding movement of the large left plunger can not output water flow, and the discharge capacity of the whole booster water pump is reduced, thereby realizing the variable of the booster water pump.
In a further technical scheme, the right variable control valve assembly comprises a right control valve core, a right spring and a right pressure sensitive plunger; a right threaded hole communicated with the right water inlet hole is formed in the right cylinder body along the axial direction of the right valve hole, a right four valve holes are formed in the bottom of the right threaded hole along the axial direction of the right threaded hole, and a right step is formed between the right threaded hole and the right four valve holes; the bottom of the right four valve holes is provided with a right five valve holes along the axial direction; a right through-flow hole and a right through-flow hole are formed in the right cylinder body, one end of the right through-flow hole is communicated with the bottom of the right five-valve hole, and the other end of the right through-flow hole is communicated with the right three-valve hole; one end of the right two-way flow hole is communicated with the right four valve holes, and the other end of the right two-way flow hole is communicated with the right one valve hole;
the right control valve core is connected in a right four-valve hole in a sliding mode, a right shoulder is arranged at one end, located in the right threaded hole, of the right control valve core, a right annular through flow groove is formed in the circumferential side face of the right control valve core and is close to the right two-way flow hole, the right shoulder is matched with the right step to control the connection and disconnection of the right threaded hole and the right four-valve hole, the right pressure sensitive plunger is connected in the right five-valve hole in a sliding mode, and the diameter of the right pressure sensitive plunger is smaller than that of the right control valve core; and a right plug is arranged at an opening of the right threaded hole, and the right spring is positioned between the right plug and the right control valve core and used for forcing the right shoulder to be pressed on the right step.
Through the technical scheme, when the right variable control valve component works, the pressure of the right water outlet hole acts on the right pressure sensitive plunger through the right three-valve hole, the right through-flow hole and the right five-valve hole to push the right control valve core to move towards the right plug direction by overcoming the acting force of the right spring, and the right shoulder is driven to leave the right step, so that the water in the corresponding right large plunger cavity flows back into the right water inlet hole through the right one-valve hole, the right two-valve hole, the right four-valve hole, the right annular through-flow groove and the right threaded hole; therefore, the corresponding movement of the large right plunger can not output water flow, the discharge capacity of the whole booster water pump is reduced, and the variable of the booster water pump is realized.
In a further technical scheme, a left sealing plate sleeved on a left large plunger and a left small plunger is arranged at the left end of the axial pore channel of the pump shell between the pump shell and the left cylinder body; a right sealing plate sleeved on the right large plunger and the right small plunger is arranged at the right end of the pump shell axial pore channel between the pump shell and the right cylinder body; set up left sealing plate and right sealing plate and can effectively prevent the cross contamination of rivers and hydraulic oil.
(III) advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages: the variable pressure ratio under different working conditions is realized through one pressure water pump, and compared with the prior art, the variable pressure ratio variable pressure pump has the advantages of compact volume, low installed power and low use cost.
Drawings
FIG. 1 is a schematic view of a main sectional structure of a booster water pump according to the present invention;
FIG. 2 is a schematic cross-sectional view at C-C in FIG. 1;
FIG. 3 is a schematic view of a portion of the cross-sectional structure of FIG. 1 at B-B;
FIG. 4 is a schematic cross-sectional view taken along line A-A of FIG. 1;
fig. 5 is a schematic view of a partial cross-sectional structure at D-D in fig. 1.
Detailed Description
Referring to fig. 1-5, a booster water pump includes a pump housing 1 having an axial hole, a P port 001 and a T port 002 communicating with the axial hole are opened on a side wall of the pump housing 1, a first annular inner shoulder 101 is provided in a middle portion of an inner hole wall of the pump housing 1, and the P port 001 and the T port 002 are located on left and right sides of the first annular inner shoulder 101.
The pump comprises a left cylinder body 2 with a left large plunger cavity 2a and a left small plunger cavity 2b, and a right cylinder body 3 with a right large plunger cavity 3a and a right small plunger cavity 3b, wherein the left cylinder body 2 and the right cylinder body 3 are respectively connected to the left end and the right end of an axial pore channel of a pump shell 1; the left cylinder body 2 is provided with a left water inlet 201 and a left water outlet 202 communicated with the left big plunger cavity 2a, and the right cylinder body 3 is provided with a right water inlet 301 and a right water outlet 302 communicated with the right big plunger cavity 3 a.
The left cylinder body 2 is provided with a left first valve hole 203 communicated with the left large plunger cavity 2a and a left second valve hole 204 communicated with the left small plunger cavity 2b, and the left first valve hole 203 and the left second valve hole 204 are both communicated with the left water inlet hole 201; a left inlet valve 29b which only allows water to enter the left large plunger cavity 2a from the left inlet hole 201 is arranged in the left first valve hole 203, and a left second inlet valve 29c which only allows water to enter the left small plunger cavity 2b from the left inlet hole 201 is arranged in the left second valve hole 204; the left cylinder body 2 is provided with a left three-valve hole 205 communicated with the left small plunger cavity 2b, and the left three-valve hole 205 is communicated with the left water outlet hole 202 through a left communication hole 2d arranged in the left cylinder body 2; a left water drainage valve 10a which only allows water to be discharged from the left large plunger cavity 2a is arranged in the left water outlet hole 202, and a left water drainage valve 10c which only allows water to be discharged from the left small plunger cavity 2b is arranged in the left three valve hole 205; the right cylinder body 3 is provided with a right first valve hole 303 communicated with the right large plunger cavity 3a and a right second valve hole 304 communicated with the right small plunger cavity 3b, and the right first valve hole 303 and the right second valve hole 304 are both communicated with the right water inlet hole 301; a right inlet valve 39b which only allows water to enter the right large plunger cavity 3a from the right inlet hole 301 is arranged in the right first valve hole 303, and a right second inlet valve 39c which only allows water to enter the right small plunger cavity 3b from the right inlet hole 301 is arranged in the right second valve hole 304; the right cylinder body 3 is provided with a right three-valve hole 305 communicated with the right small plunger cavity 3b, and the right three-valve hole 305 is communicated with the right water outlet hole 302 through a right communication hole 3e arranged in the right cylinder body 3; a right water discharge valve 10b which only allows water to be discharged from the right large plunger cavity 3a is arranged in the right water outlet hole 302, and a right two water discharge valve 10d which only allows water to be discharged from the right small plunger cavity 3b is arranged in the right three valve hole 305.
A T-shaped piston 6 with an axial channel, which is arranged in the pump housing 1 and can slide left and right, a thin shaft part of the piston 6 is in sealing fit with the inner peripheral wall of the first annular inner shoulder 101, a first sealing ring 601 is arranged between the outer periphery of a large shaft part of the piston 6 and the inner hole wall of the pump housing 1, a left piston cavity 1d is formed between the left side of the large shaft part of the piston 6 and the first annular inner shoulder 101, a right piston cavity 1b is formed on the right side of the large shaft part of the piston 6, an oil return cavity 1a is formed on the left side of the thin shaft part of the piston 6, a P oil port 001 is communicated with the left piston cavity 1d, a T002 oil port is communicated with the oil return cavity 1a, a second annular inner shoulder 602 is arranged on the inner peripheral wall of the axial channel of the piston 6, the second annular inner shoulder 602 forms a valve port 604, a first through hole 6b, a second through hole 6a and a third through hole 6f are formed on the thin shaft part of the piston 6, the first, the second through hole 6a is used to communicate the axial channel on the left side of the second annular inner shoulder 602 with the oil return chamber 1a, the inlet end of the third through hole 6f is located in the valve port 604, and there are three outlet ends of the third through hole 6f, one of the three outlet ends is a first outlet end 6f1 always communicated with the right piston chamber 1b, the other one is a second outlet end 6f2 selectively communicated with the oil return chamber 1a or the left piston chamber 1d, and the third one is a third outlet end 6f3 always communicated with the axial channel on the left end of the second annular inner shoulder 602.
The large valve core 7 is positioned on the left side of the second annular inner shoulder 602 and is connected in an axial channel of the piston 6 in a sliding manner, the left and right sliding of the large valve core 7 can determine whether to open the left port of the valve port 604, the small valve core 8 is in a T shape, the large end of the small valve core 8 is positioned on the right side of the second annular inner shoulder 602, the thin shaft of the small valve core 8 penetrates through the valve port 604 and is connected with the large valve core 7 in a threaded manner, and the left and right sliding of the large end of the small valve core 8 can determine whether to open the right port of the valve port 604.
The left end of the axial channel of the piston 6 is provided with a left large plunger 5b which is connected in the left large plunger cavity 2a in a sliding way, and the right end of the axial channel of the piston 6 is provided with a right large plunger 5a which is connected in the right large plunger cavity 3a in a sliding way; install sliding connection on the left end face of piston 6 and be equipped with left little plunger 4b in left little plunger chamber 2b, install sliding connection on the right-hand member face of piston 6 and be equipped with right little plunger 4a in right little plunger chamber 3 b. The left large plunger 5b and the right large plunger 5a are the same in size, and the left small plunger 2b and the right small plunger 2a are the same in size.
Install the left variable control valve subassembly that is used for controlling flow and pressure in the left apopore 202 in the left cylinder body 2, install the right variable control valve subassembly that is used for controlling flow and pressure in the left apopore 202 in the right cylinder body 3.
The left variable control valve assembly comprises a left control valve core 12a, a left spring 13a and a left pressure sensitive plunger 11 a; a left threaded hole 206 communicated with the left water inlet hole 201 is formed in the left cylinder body 2 along the axial direction of the left valve hole 203, a left four valve hole 207 is formed at the bottom of the left threaded hole 206 along the axial direction of the left threaded hole, and a left step 208 is formed between the left threaded hole 206 and the left four valve hole 207; the bottom of the left four valve hole 207 is provided with a left five valve hole 2i along the axial direction; a left through flow hole 2h and a left through flow hole 2g are arranged in the left cylinder body 2, one end of the left through flow hole 2h is communicated with the bottom of the left five-valve hole 2i, and the other end of the left through flow hole is communicated with the left three-valve hole 205; one end of the left second through hole 2g is communicated with the left four valve hole 207, and the other end is communicated with the left first valve hole 203.
The left control valve core 12a is slidably connected in the left four-valve hole 207, a left shoulder 12a1 is arranged at one end of the left control valve core 12a positioned in the left first threaded hole 206, a left annular through flow groove 12a2 is arranged on the circumferential side surface of the left control valve core 12a and close to the left second through flow hole 2g, the left shoulder 12a1 is matched with the left first step 208 to control the connection and disconnection of the left first threaded hole 206 and the left four-valve hole 207, the left pressure sensitive plunger 11a is slidably connected in the left five-valve hole 2i, and the diameter of the left pressure sensitive plunger 11a is smaller than that of the left control valve core 12 a; a left plug 23 is mounted at the opening of the left threaded hole 206, and the left spring 13a is located between the left plug 23 and the left control valve core 12a for forcing the left land 12a1 to press against the left land 208.
The right variable control valve assembly comprises a right control valve core 12b, a right spring 13b and a right pressure sensitive plunger 11 b; a right threaded hole 306 communicated with the right water inlet hole 301 is formed in the right cylinder body 3 along the axial direction of the right valve hole 303, a right four valve holes 307 are formed in the bottom of the right threaded hole 306 along the axial direction of the right threaded hole, and a right step 308 is formed between the right threaded hole 306 and the right four valve holes 307; the bottom of the right four valve hole 307 is provided with a right five valve hole 3i along the axial direction; a right through-flow hole 3h and a right through-flow hole 3g are formed in the right cylinder body 3, one end of the right through-flow hole 3h is communicated with the bottom of the right five-valve hole 3i, and the other end of the right through-flow hole is communicated with a right three-valve hole 305; one end of the right two-way flow hole 3g is communicated with the right four valve hole 307, and the other end is communicated with the right one valve hole 303.
The right control valve core 12b is connected in the right four-valve hole 307 in a sliding manner, a right shoulder 12b1 is arranged at one end, located in the right first threaded hole 306, of the right control valve core 12b, a right annular through flow groove 12b2 is arranged on the circumferential side face of the right control valve core 12b and close to the right through-flow hole 3g, the right shoulder 12b1 is matched with the right first step 308 to control the connection and disconnection of the right first threaded hole 306 and the right four-valve hole 307, the right pressure sensitive plunger 11b is connected in the right five-valve hole 3i in a sliding manner, and the diameter of the right pressure sensitive plunger 11b is smaller than that of the right control valve core 12 b; a right plug 33 is mounted at the opening of the right threaded hole 306, and the right spring 13b is positioned between the right plug 33 and the right control valve core 12b and used for forcing the right shoulder 12b1 to be pressed against the right step 308.
A left sealing plate 24 sleeved on the left large plunger 5b and the left small plunger 4b is arranged at the left end of the axial pore channel of the pump shell 1 between the pump shell 1 and the left cylinder body 2; a right sealing plate 34 sleeved on the right large plunger 5a and the right small plunger 4a is arranged at the right end of the axial pore channel of the pump shell 1 between the pump shell 1 and the right cylinder body 3; the left sealing plate 24 and the right sealing plate 34 are arranged to effectively prevent cross contamination of water flow and hydraulic oil.
When the booster water pump works, the P oil port 001 is connected with a hydraulic oil high-pressure oil port, the T oil port 002 is directly connected with a hydraulic oil tank, the left-right reciprocating motion of the piston 6 is controlled by controlling oil supply to the P oil port 001, and then the left large plunger and the left small plunger at the left end of the piston 6 are driven to respectively reciprocate in the left large plunger cavity 2a and the left small plunger cavity 2b, and water enters the left large plunger cavity 2a and the left small plunger cavity 2b from the left water inlet hole 201 through the matching of the left water inlet valve 29b, the left water outlet valve 10a, the left water inlet valve 29c and the left water outlet valve 10c, and then is discharged from the left water outlet hole 202 at high pressure; at the same time drive the positionA right large plunger and a right small plunger at the right end of the piston 6 respectively reciprocate in the right large plunger cavity 3a and the right small plunger cavity 3b, and water enters the right large plunger cavity 3a and the right small plunger cavity 3b from the right water inlet hole 301 through the matching of the right first water inlet valve 39b, the right water discharge valve 10b, the right second water inlet valve 39c and the right second water discharge valve 10d, and then is discharged from the right water outlet hole 302 at high pressure; at the moment, the pressure ratio of the booster water pump
Wherein S is the area of action of the piston; sDIs the action area of the left large plunger or the right large plunger; sXIs the action area of the left small plunger or the right small plunger; when the pressure of the left water outlet hole 202 reaches a preset pressure, the left variable control valve assembly works, the pressure of the left water outlet hole 202 acts on the left pressure sensitive plunger 11a through the left three-valve hole 205, the left first through-flow hole 2h and the left five-valve hole 2i to push the left control valve core 12a to move towards the left plug 23 direction against the acting force of the left spring 13a, and the left shoulder 12a1 is driven to leave the left first step 208, so that the water in the corresponding left large plunger cavity 2a flows back into the left water inlet hole 201 through the left first valve hole 203, the left second through-flow hole 2g, the left four-valve hole 207, the left annular through-flow groove 12a2 and the left threaded hole 206; therefore, the corresponding left big plunger does not output water flow when moving, and unloading of the left big plunger cavity 2a is realized; in a similar way, when the pressure of the right water outlet hole 302 reaches a preset pressure, the right variable control valve assembly works, the pressure of the right water outlet hole 302 acts on the right pressure sensitive plunger 11b through the right three valve hole 305, the right through-flow hole 3h and the right five-valve hole 3i to push the right control valve core 12b to move towards the right direction of the right plug 33 against the acting force of the right spring 13b, and drive the right shoulder 12b1 to leave the right step 308, so that the water in the corresponding right large plunger cavity 3a flows back into the right water inlet hole 301 through the right one valve hole 303, the right through-flow hole 3g, the right four valve hole 307, the right annular through-flow groove 12b2 and the right threaded hole 306; therefore, the corresponding movement of the right big plunger can not output water flow, thereby realizing the unloading of the cavity 3a of the right big plunger, and the pressure ratio of the booster water pump at the moment
Wherein S is the area of action of the piston;SXis the effective area of the left small plunger or the right small plunger. Here, if the pressure of the left water outlet hole 202 is directly applied to the left control valve core 12a, unloading of the corresponding left large plunger cavity 2a can be achieved, but in order to achieve high pressure of water flow in the left water outlet hole 202, the specification of the left spring 13a is large, so that the volume of the left control valve core 12a is increased, and therefore, the leakage amount is increased; therefore, the diameter of the left pressure sensitive plunger 11a is smaller than that of the left control valve core 12a, so that the specification of the left spring 13a is reduced, and the leakage amount is greatly reduced.
The reciprocating motion control of the piston 6 is completed by a large valve core 7 and a small valve core 8, the diameter of the large valve core 7 is larger than that of the valve port 604, a thin shaft part of the small valve core 8 penetrates through the valve port 604 and then is in threaded connection with the large valve core 7, the left and right slippage of the large end part of the small valve core 8 can determine whether the right port of the valve port 604 is opened or not, and the left and right slippage of the large valve core 7 can determine whether the left port of the valve port 604 is opened or not.
When the small valve core 8 opens the right port of the valve port 604, the oil can enter the right piston cavity 1b through the P oil port 001, the first through-flow hole 6b and the third through-flow hole 6f, the oil in the right piston cavity 1b acts on the annular area formed by the piston 6 and the right plunger (the annular area is larger than the annular area formed by the shoulder part of the piston 6), the piston 6 moves leftwards under the area difference, when the piston 6 moves leftwards to the second outlet port 6f2 of the third through-flow hole 6f to communicate with the oil return cavity 1a, the left end cavity of the large valve core 7 communicates with the oil return port through the second outlet port 6f2 of the third through-flow hole 6f, the small valve core 8 moves leftwards to close the right port of the valve port 604, the large valve core 7 opens the left port of the valve port 604, so that the right piston cavity 1b communicates with the oil return cavity 1a through the left port of the valve port 604 and the second through-flow hole 6a, and, when the piston 6 moves to the right and the second outlet port 6f2 of the third through hole 6f communicates with the left piston chamber 1d, the large valve spool 7 and the small valve spool 8 move together to the right under the action of the area difference (the diameter of the large valve spool 7 is larger than that of the valve port 604), the large valve spool 7 closes the left port of the valve port 604 again, and the small valve spool 8 opens the right port of the valve port 604 again, so that the piston 6 starts to move to the left, and a cycle is formed.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various 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. A booster water pump is characterized by comprising a pump shell with an axial hole passage, wherein a P oil port and a T oil port which are communicated with the axial hole passage are formed in the side wall of the pump shell;
the pump comprises a left cylinder body with a left large plunger cavity and a left small plunger cavity, and a right cylinder body with a right large plunger cavity and a right small plunger cavity, wherein the left cylinder body and the right cylinder body are respectively connected to the left end and the right end of an axial pore channel of a pump shell; the left cylinder body is provided with a left water inlet and a left water outlet communicated with the left large plunger cavity, and the right cylinder body is provided with a right water inlet and a right water outlet communicated with the right large plunger cavity;
the left cylinder body is provided with a left valve hole communicated with the left large plunger cavity and a left second valve hole communicated with the left small plunger cavity, and the left valve hole and the left second valve hole are both communicated with the left water inlet hole; a left water inlet valve which only allows water to enter the left large plunger cavity from the left water inlet hole is arranged in the left first valve hole, and a left second water inlet valve which only allows water to enter the left small plunger cavity from the left water inlet hole is arranged in the left second valve hole; the left cylinder body is provided with a left three-valve hole communicated with the left small plunger cavity, and the left three-valve hole is communicated with the left water outlet hole; a left drain valve only allowing water to be discharged from the left large plunger cavity is arranged in the left water outlet hole, and a left drain valve only allowing water to be discharged from the left small plunger cavity is arranged in the left three valve hole; the right cylinder body is provided with a right valve hole communicated with the right large plunger cavity and a right two valve holes communicated with the right small plunger cavity, and the right valve hole and the right two valve holes are both communicated with the right water inlet hole; a right water inlet valve which only allows water to enter the right large plunger cavity from the right water inlet hole is arranged in the right valve hole, and a right two water inlet valves which only allows water to enter the right small plunger cavity from the right water inlet hole are arranged in the right valve hole; the right cylinder body is provided with a right three-valve hole communicated with the right small plunger cavity, and the right three-valve hole is communicated with the right water outlet hole; a right water discharge valve only allowing water to be discharged from the right large plunger cavity is arranged in the right water outlet hole, and a right two water discharge valve only allowing water to be discharged from the right small plunger cavity is arranged in the right three valve hole;
the piston is provided with an axial channel and is in a T shape, the piston is arranged in the pump shell and can slide left and right, a thin shaft part of the piston is in sealing fit with the inner peripheral wall of a first annular inner shoulder, a first sealing ring is arranged between the periphery of a large shaft part of the piston and the inner hole wall of the pump shell, a left piston cavity is formed between the left side of the large shaft part of the piston and the first annular inner shoulder, a right piston cavity is formed on the right side of the large shaft part of the piston, an oil return cavity is formed on the left side of the thin shaft part of the piston, a P oil port is communicated with the left piston cavity, a T oil port is communicated with the oil return cavity, a second annular inner shoulder is arranged on the inner peripheral wall of the axial channel of the piston, the second annular inner shoulder is encircled to form a valve port, a first through hole, a second through hole and a third through hole are formed in the thin shaft part of the piston, the first through hole, the inlet end of the third through hole is positioned in the valve port, and the number of the outlet ends of the third through hole is three, wherein one outlet end is a first outlet end which is always communicated with the right piston cavity, the other outlet end is a second outlet end which is selected to be communicated with the oil return cavity or the left piston cavity, and the third outlet end is a third outlet end which is always communicated with the axial channel at the left end of the second annular inner shoulder;
the diameter of the large valve core is larger than that of the valve port, the large valve core is positioned on the left side of the second annular inner shoulder and is connected in an axial channel of the piston in a sliding manner, the left and right sliding of the large valve core can determine whether to open the left port of the valve port, the small valve core is in a T shape, the large head part of the small valve core is positioned on the right side of the second annular inner shoulder, the thin shaft part of the small valve core penetrates through the valve port and then is in threaded connection with the large valve core, and the left and right sliding of the large head part of the small valve core can determine whether to open the;
the left end of the axial channel of the piston is provided with a left large plunger which is connected in a sliding manner in the left large plunger cavity, and the right end of the axial channel of the piston is provided with a right large plunger which is connected in a sliding manner in the right large plunger cavity; a left small plunger slidably connected in the left small plunger cavity is mounted on the left end face of the piston, and a right small plunger slidably connected in the right small plunger cavity is mounted on the right end face of the piston;
a left variable control valve component for controlling the flow and the pressure in the left water outlet hole is arranged in the left cylinder body, and a right variable control valve component for controlling the flow and the pressure in the right water outlet hole is arranged in the right cylinder body;
the left variable control valve component comprises a left control valve core, a left spring and a left pressure sensitive plunger; a left threaded hole communicated with the left water inlet hole is formed in the left cylinder body along the axial direction of the left valve hole, a left four valve holes are formed in the bottom of the left threaded hole along the axial direction of the left threaded hole, and a left step is formed between the left threaded hole and the left four valve holes; the bottom of the left four valve holes is provided with a left five valve holes along the axial direction; a left first through flow hole and a left second through flow hole are formed in the left cylinder body, one end of the left first through flow hole is communicated with the bottom of the left five-valve hole, and the other end of the left first through flow hole is communicated with the left three-valve hole; one end of the left second through flow hole is communicated with the left four valve holes, and the other end of the left second through flow hole is communicated with the left first valve hole; the left control valve core is connected in a left four-valve hole in a sliding mode, a left shoulder is arranged at one end, located in a left threaded hole, of the left control valve core, a left annular through-flow groove is formed in the circumferential side face of the left control valve core and close to a left two-through-flow hole, the left shoulder and a left first step are matched to control the connection and disconnection of the left threaded hole and the left four-valve hole, the left pressure sensitive plunger is connected in a left five-valve hole in a sliding mode, and the diameter of the left pressure sensitive plunger is smaller than that of the left control valve core; the left spring is positioned between the left plug and the left control valve core and used for forcing the left shoulder to be pressed on the left step;
the right variable control valve component comprises a right control valve core, a right spring and a right pressure sensitive plunger; a right threaded hole communicated with the right water inlet hole is formed in the right cylinder body along the axial direction of the right valve hole, a right four valve holes are formed in the bottom of the right threaded hole along the axial direction of the right threaded hole, and a right step is formed between the right threaded hole and the right four valve holes; the bottom of the right four valve holes is provided with a right five valve holes along the axial direction; a right through-flow hole and a right through-flow hole are formed in the right cylinder body, one end of the right through-flow hole is communicated with the bottom of the right five-valve hole, and the other end of the right through-flow hole is communicated with the right three-valve hole; one end of the right two-way flow hole is communicated with the right four valve holes, and the other end of the right two-way flow hole is communicated with the right one valve hole; the right control valve core is connected in a right four-valve hole in a sliding mode, a right shoulder is arranged at one end, located in the right threaded hole, of the right control valve core, a right annular through flow groove is formed in the circumferential side face of the right control valve core and is close to the right two-way flow hole, the right shoulder is matched with the right step to control the connection and disconnection of the right threaded hole and the right four-valve hole, the right pressure sensitive plunger is connected in the right five-valve hole in a sliding mode, and the diameter of the right pressure sensitive plunger is smaller than that of the right control valve core; and a right plug is arranged at an opening of the right threaded hole, and the right spring is positioned between the right plug and the right control valve core and used for forcing the right shoulder to be pressed on the right step.
2. The booster water pump according to claim 1, wherein a left sealing plate sleeved on a left large plunger and a left small plunger is mounted at the left end of the pump shell axial hole channel between the pump shell and the left cylinder body; and a right sealing plate sleeved on the right large plunger and the right small plunger is arranged at the right end of the pump shell axial pore channel between the pump shell and the right cylinder body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811460961.5A CN109611305B (en) | 2018-12-01 | 2018-12-01 | Booster water pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811460961.5A CN109611305B (en) | 2018-12-01 | 2018-12-01 | Booster water pump |
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| CN109611305A CN109611305A (en) | 2019-04-12 |
| CN109611305B true CN109611305B (en) | 2020-02-21 |
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| CN201811460961.5A Active CN109611305B (en) | 2018-12-01 | 2018-12-01 | Booster water pump |
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| CN114076131B (en) * | 2020-08-20 | 2023-10-13 | 广东精克仕动力技术有限公司 | Automatic reverser for air cylinder |
| CN115434974B (en) * | 2022-08-31 | 2024-12-03 | 潍柴动力股份有限公司 | Pilot-operated type hydraulic proportional actuating mechanism and hydraulic pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US2508298A (en) * | 1948-04-16 | 1950-05-16 | Oliver J Saari | Fluid pressure intensifying device |
| US5197285A (en) * | 1990-02-02 | 1993-03-30 | The University Of British Columbia | Modular digital actuator |
| CN2743573Y (en) * | 2004-07-08 | 2005-11-30 | 韩昌求 | Variable capacity booster pump |
| DE102006038862A1 (en) * | 2006-08-18 | 2008-02-21 | Scanwill Aps | Pressure intensifier with double seat valve |
| CN104847713B (en) * | 2015-06-08 | 2016-08-24 | 山东奥凯机电设备有限公司 | A kind of full-automatic built-in commutation hydraulic booster pump |
| CN108612681B (en) * | 2018-05-18 | 2019-12-20 | 蚌埠市正大压缩机有限公司 | Hydraulic booster pump |
| CN108644093B (en) * | 2018-05-18 | 2019-08-06 | 深圳市凯福机电设备有限公司 | A kind of hydraulic drive air compressor |
| CN108561344B (en) * | 2018-05-18 | 2020-03-27 | 上海舜诺机械有限公司 | Double-acting reciprocating hydraulic pressure booster |
| CN108644162B (en) * | 2018-05-18 | 2019-10-08 | 佛山市力能液压机械有限公司 | A kind of compact hydraulic booster |
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Inventor after: Liu Hongtao Inventor after: Xu Hongliang Inventor after: Other inventors request not to publish their names Inventor before: Request for anonymity |
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Effective date of registration: 20200123 Address after: 257000 Dongying West Suburb Industrial Park, Shandong Province (Dong Jixiang Government East) Applicant after: DongYing Shengchang Petroleum Machinery Co.,Ltd. Address before: 315040 Room 408-1, 265, 75 blocks, Huangguxincun, Baihe Street, Yinzhou District, Ningbo City, Zhejiang Province Applicant before: Li Jun |
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