CN108644162A - A kind of compact hydraulic booster - Google Patents
A kind of compact hydraulic booster Download PDFInfo
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- CN108644162A CN108644162A CN201810479402.2A CN201810479402A CN108644162A CN 108644162 A CN108644162 A CN 108644162A CN 201810479402 A CN201810479402 A CN 201810479402A CN 108644162 A CN108644162 A CN 108644162A
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Classifications
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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
Abstract
The present invention relates to a kind of compact hydraulic boosters, it is characterised in that：Including valve casing, left cylinder body with left plunger cavity and the right cylinder body with right plunger chamber, with axial passage and piston in T shape, big valve core and small valve core, the diameter of big valve core is more than the diameter of valve port, left plunger and right plunger, left plunger be set in left cylinder body and can left and right slide, the left end of the inner end of left plunger and the axial passage of piston is connected and can be slid with piston or so, and the right end of the inner end of right plunger and the axial passage of piston is connected and can be slid with piston or so.This hydraulic intensifier has integrated level height, volume compact.And because of the second outlet end of the first through flow hole when being connected to oil back chamber and left piston chamber, all there are a certain distance in piston left and right ends with the bottom surface of corresponding cylinder body, this guarantees can piston and two end cap collision before complete liquid controlled reversing valve module commutation, therefore without hit vibration, noise it is small.
Description
Technical field
The invention belongs to a kind of hydraulic intensifiers, and in particular to a kind of compact hydraulic booster.
Background technology
Hydraulic intensifier is different using piston both ends active area and the identical principle of stress size, and hydraulic pressure is put
Low pressure can be increased to 200MPa or more by a kind of big ultrahigh-pressure hydraulic element, hydraulic intensifier.Hydraulic intensifier
Three kinds of single-acting one-stroke booster, single-action reciprocating booster and Double-action reciprocating formula booster can be divided into.Single-acting
For one-stroke booster due to can only be moved to a direction, by travel limit, output flow is limited, can not reach continuous increasing
Pressure, the scope of application are narrow.Single-action reciprocating booster may be implemented continuously to be pressurized, but can only one way supercharging, oil sources utilize
Rate only has half, output flow also limited.Two-way continuous supercharging may be implemented, no in Double-effect reciprocating hydraulic pressure booster
By travel limit, output flow is big, is ideal pressurizing elements.But traditional Double-action reciprocating formula that the country uses at present
Hydraulic intensifier is the continuous commutation by solenoid directional control valve, and control pressurized cylinder moves back and forth continuous output high pressure, complicated,
Volume and weight is huge, it has not been convenient to carry, be difficult to use in terms of inflammable and explosive occasion and portable mechanism.
The Chinese invention patent of Publication No. CN101666339A proposes a kind of hydraulic intensifier, is changed using Stroke Control
The scheme continuously moved to valve and main reversing valve control pressurized cylinder, the program are controlled compared with domestic traditional using solenoid directional control valve
The double-acting supercharger of commutation has innovation, but there is also following disadvantages：
(1) since its return of stroke valve is maintained at two positions using steel ball positioning and chain, pressurized cylinder is controlled to difference
Direction movement, it is complicated, difficulty of processing is big.And steel ball positioning is easy to fail, chain is pulled off, and Stroke Control reversal valve will
In floating position, i.e. pressurized cylinder stop motion, therefore this control mode is unreliable；
(2) after its piston moves to the end in one direction, piston can generate shock with the end cap of respective direction, continue
The continuous noise generated that hits of piston and end cap is very big in high frequency motion, and produces adverse effect to service life.
In conclusion existing hydraulic intensifier can be further improved.
Invention content
A kind of liquid of structure novel is provided the technical problem to be solved by the present invention is to present situation for the above-mentioned prior art
Pressure booster has the advantages that the automatic reciprocating supercharging of low noise, energy high-frequency and volume compact.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of compact hydraulic booster, feature
It is：Include the valve casing with axial channel, the oil inlet and oil return opening being connected to axial channel, valve casing are provided on valve housing side wall
Inner hole wall in the middle part of there is first annular interior omoplate, oil inlet and oil return opening to be located at the left and right sides of first annular interior omoplate；Tool
There are the left cylinder body of left plunger cavity and the right cylinder body with right plunger chamber, is connected to the left and right ends of valve casing axial channel, it is left
Left oil inlet runner and left high pressure hydraulic fluid port are provided with cylinder, being equipped in left oil inlet runner only allows oil inlet fluid to enter left plunger cavity
Left in line check valve, the left oil outlet one-way valve for allowing fluid to be discharged from left plunger cavity, right cylinder body are equipped with only in left high pressure hydraulic fluid port
On be provided with right oil inlet runner and right high pressure hydraulic fluid port, the right side for only allowing oil inlet fluid to enter right plunger chamber is equipped in right oil inlet runner
In line check valve, right high pressure hydraulic fluid port is interior to be equipped with the right oil outlet one-way valve for only allowing fluid to be discharged from right plunger chamber；The left oil inlet
Runner is connected by the first fuel feed hole being located on valve casing with oil inlet, the right oil inlet runner by be located on valve casing
Two fuel feed holes are connected with oil inlet；With axial passage and piston in T shape, be set in valve casing and can left and right sliding, live
The thin axle portion of plug and the internal perisporium sealing of first annular interior omoplate coordinate, the inner hole wall of big the axle portion periphery and right piston chamber of piston
Between be equipped with the first sealing ring, between the left side of the big axle portion of piston and first annular interior omoplate formed left piston chamber, piston
The right side of big axle portion forms right piston chamber, and the left side of the thin axle portion of piston forms oil back chamber, and oil inlet is connected to left piston chamber, is returned
Hydraulic fluid port is connected to oil back chamber, and the axial channel internal perisporium of piston is equipped with omoplate in the second annular, and omoplate surrounds in the second annular
Valve port, is provided with the first through flow hole, the second through flow hole and third through flow hole in the thin axle portion of piston, and the first through flow hole is being connected to
Axial passage in second ring on the right side of omoplate and left piston chamber, the second through flow hole is to the axis that is connected in the second annular on the left of omoplate
To channel and oil back chamber, the input end of third through flow hole is located in valve port, and there are three the outlet ends of third through flow hole, one of them
To be connected to first exit end with right piston chamber always, another is selection second going out whether be connected to oil back chamber or left piston chamber
Mouth end, third are the third outlet end being connected to always with the axial passage of omoplate left end in the second annular；Big valve core and small valve
Core, the diameter of big valve core are more than the diameter of valve port, and big valve core is located in the second annular on the left of omoplate and is set between axial passage
There is the second sealing ring, whether the left and right sliding of big valve core can determine to open the left port of valve port, small valve core is in T shape, small valve core
Enlarged head be located in the second annular on the right side of omoplate, the thin axle portion of small valve core is threadedly coupled after passing through valve port with big valve core, small valve
Whether the left and right sliding of the enlarged head of core can determine to open the right output port of valve port；Left plunger and right plunger, left plunger are set to left cylinder
In body and can left and right sliding, be interstitial fluid sealing cooperation between the periphery and left cylinder body endoporus of left plunger, thus in left cylinder body
Form left plunger cavity, the left end connection of the inner end of left plunger and the axial passage of piston with can be slid with piston or so；Right plunger
In right cylinder body and can left and right sliding, between the periphery and right cylinder body endoporus of right plunger for interstitial fluid sealing cooperation, thus
The right end of formation right plunger chamber in right cylinder body, the inner end of right plunger and the axial passage of piston is connected and can be slided with piston or so
It moves.
Preferably, in the state that piston is moved to left to the second outlet end of third through flow hole and is connected to oil back chamber, it is described
The left side of piston has spacing with the bottom surface of left cylinder body, is moved to right to the second outlet end of third through flow hole and left piston in piston
In the state of chamber connection, there is certain distance in the right side of the piston with the bottom surface of right cylinder body.Because of third through flow hole therein one
A outlet end when being connected to oil back chamber and left piston chamber, piston left and right ends all have with corresponding cylinder body bottom surface it is certain away from
From this guarantees the commutations that can complete big valve core or small valve core before piston and the collision of left cylinder body or right cylinder body, therefore nothing is hit
It is small to hit vibration, noise.
Compared with the prior art, the advantages of the present invention are as follows：Changed by piston displacement, big valve core is made to pass through on piston
Third through flow hole second outlet end selection either be connected to oil return opening or is connected to pressure oil port, recycling big valve core with it is small
The difference in areas of spool, to complete the commutation of big valve core and small valve core, and then control right piston chamber either with pressure oil port or with
Oil return opening leads to complete bilateral reciprocation.Therefore this hydraulic intensifier has integrated level height, volume compact.And because first is logical
The second outlet end of discharge orifice when being connected to oil back chamber and left piston chamber, piston left and right ends all with the bottom surface of corresponding cylinder body
There is a certain distance, this guarantees changing for big valve core or small valve core can be completed before piston and left cylinder body or the collision of right cylinder body
To, therefore it is small without shock vibration, noise.
The reciprocating motion control of piston is completed by big valve core and small valve core, and the diameter of big valve core is more than the straight of valve port
The thin axle portion of diameter, small valve core is threadedly coupled after valve port with big valve core, and the left and right sliding of the enlarged head of small valve core can determine to open
Whether opening the right output port of valve port, whether the left and right sliding of big valve core can determine to open the left port of valve port；When small valve core opens valve
When the right output port of mouth, fluid can enter right piston chamber, the oil of right piston chamber after oil inlet, the first through flow hole, third through flow hole
Liquid acts on the annulus area formed by piston and right plunger that (this annulus area is more than the annular that is formed of convex shoulder part of piston
Area), therefore piston moves downward under difference in areas, when piston move to from right to left the second outlet end of third through flow hole with
Oil back chamber communicates, and is communicated with oil return opening at the left end of big valve core, and small valve core moves downward the right output port of close port, and big valve core is beaten
The left port of valve opening mouth, such right piston chamber after the left port of valve port and the second through flow hole with oil back chamber by communicating, Jin Erliu
To oil return opening, such piston starts to move right, when piston moves right second outlet end and the left piston of third through flow hole
When chamber communicates, big valve core and small valve core move right together under the action of difference in areas, and big valve core is re-closing off the left end of valve port
Mouthful, small valve core reopens the right output port of valve port, and such piston starts to move downward, and forms cycle.In the left plunger of piston driving
In moving downward, right in line check valve is opened, and fluid enters right plunger chamber, while through left fuel-displaced after the fluid supercharging of left plunger cavity
Check valve is discharged；Piston moves right similar.
Description of the drawings
Fig. 1 is the structural schematic diagram of the embodiment of the present invention.
Specific implementation mode
Below in conjunction with attached drawing embodiment, present invention is further described in detail.
As shown in Figure 1, being a preferred embodiment of the present invention.
A kind of compact hydraulic booster, including
Valve casing 5 with axial channel is provided with the oil inlet P and oil return inlet T being connected to axial channel on 5 side wall of valve casing,
There is first annular interior omoplate 51, oil inlet P and oil return inlet T are located at first annular interior omoplate 51 in the middle part of the inner hole wall of valve casing 2
The left and right sides；
Left cylinder body 2 with left plunger cavity 10a and the right cylinder body 8 with right plunger chamber 10b are connected to 5 axis of valve casing
To the left and right ends in duct, it is provided with left oil inlet runner 21 and left high pressure hydraulic fluid port H1 on left cylinder body 2, is equipped with only in left oil inlet runner 21
Allow oil inlet fluid to enter the left in line check valve 7a of left plunger cavity 10a, be equipped in left high pressure hydraulic fluid port H1 only allow fluid from
The left oil outlet one-way valve 6a of left plunger cavity 10a discharge, is provided with right oil inlet runner 81 and right high pressure hydraulic fluid port H2 on right cylinder body 8, it is right into
In the interior right in line check valve 7b for being equipped with only permission oil inlet fluid and entering right plunger chamber 10b in oil stream road 81, right high pressure hydraulic fluid port H2
Equipped with the right oil outlet one-way valve 6b for only allowing fluid to be discharged from right plunger chamber 10b；
With axial passage and piston 1 in T shape, be set in valve casing 5 and can left and right sliding, the thin axle portion of piston 1 and
The internal perisporium sealing cooperation of first annular interior omoplate 51, is equipped with first between the big axle portion periphery of piston 1 and the inner hole wall of valve casing 5
Sealing ring 9a forms left piston chamber 52, the big axis of piston 1 between the left side of the big axle portion of piston 1 and first annular interior omoplate 51
The right side in portion forms right piston chamber 54, and the left side of the thin axle portion of piston 1 forms oil back chamber 53, and oil inlet P connects with left piston chamber 52
Logical, oil return inlet T is connected to oil back chamber 53, and the axial channel internal perisporium of piston 1 is equipped with omoplate 14 in the second annular, the second annular
Interior omoplate 14 surrounds valve port 15, and the first through flow hole 11, the second through flow hole 12 and third through flow hole are provided in the thin axle portion of piston 1
13, the first through flow hole 11 is to the axial passage and left piston chamber 52 that are connected in the second annular on the right side of omoplate 14, the second through flow hole
12 are located at valve to be connected to the axial passage and oil back chamber 53, the input end of third through flow hole 13 in 14 left side of omoplate in the second annular
In mouth 15, there are three the outlet ends of third through flow hole 13, one of them is to be connected to first exit end with right piston chamber 54 always
131, another is second outlet end 132 of selection whether be connected to oil back chamber 53 or left piston chamber 52, third is a be always with
The third outlet end 133 of the axial passage connection of 14 left end of omoplate in second annular；
The diameter D1 of big valve core 4b and small valve core 4a, big valve core 4b are more than the diameter D2 of valve port 15, and big valve core 4b is located at the
The second sealing ring 9b is equipped in second ring on the left of omoplate 14 and between axial passage, the left and right sliding of big valve core 4b can determine to open
Whether opening the left port of valve port 15, small valve core 4a is in T shape, and the enlarged head of small valve core 4a is located at 14 right side of omoplate in the second annular
The thin axle portion of side, small valve core 4a is threadedly coupled after valve port 15 with big valve core 4b, the left and right sliding of the enlarged head of small valve core 4a
Whether capable of determining to open the right output port of valve port 15；
Left plunger 3a and right plunger 3b, left plunger 3a be set in left cylinder body 2 and can left and right sliding, the periphery of left plunger 3a and
It is interstitial fluid sealing cooperation between 2 endoporus of left cylinder body, to form left plunger cavity 10a, the inner end of left plunger 3a in left cylinder body 2
It connect and can be slid with piston 1 or so with the left end of the axial passage of piston 1；Right plunger 3b is set in right cylinder body 8 and can left and right
It slides, is interstitial fluid sealing cooperation between 8 endoporus of periphery and right cylinder body of right plunger 3b, in the interior right column of formation of right cylinder body 8
Chamber 10b is filled in, the inner end of right plunger 3b connect with the right end of the axial passage of piston 1 and can be slid with piston 1 or so.
In the state that piston 1 is moved to left to the second outlet end 132 of third through flow hole 13 and is connected to oil back chamber 53, the work
The bottom surface of left side and the left cylinder body 2 of plug 1 has spacing, piston 1 move to right to the second outlet end 132 of third through flow hole 13 with
In the state that left piston chamber 52 is connected to, there is certain distance in the right side of the piston 1 with the bottom surface of right cylinder body 8.
The operation principle and process of this compact hydraulic booster is as follows：
In use, oil inlet P is connected with hydraulic oil high pressure hydraulic fluid port, oil return inlet T and hydraulic oil tank are connected directly, left high pressure
Hydraulic fluid port H1, which with right high pressure hydraulic fluid port H2 connected exterior line and connects together, is output to executive component.
The reciprocating motion control of piston 1 is completed by big valve core 4b and small valve core 4a, and the diameter D1 of big valve core 4b is big
It is threadedly coupled with big valve core 4b after valve port 15 in the thin axle portion of the diameter D2 of valve port 15, small valve core 4a, small valve core 4a's is big
Whether the left and right sliding on head can determine to open the right output port of valve port 15, the left and right sliding of big valve core 4a can determine to open valve port 15
Left port whether.
When small valve core 4a opens the right output port of valve port 15, as described in Figure 1, fluid can be through oil inlet P, the first through flow hole
11, enter right piston chamber 54 after third through flow hole 13, the fluid of right piston chamber 54 is acted on to be formed by piston 1 and right plunger 3b
On annulus area (this annulus area is more than the annulus area that the convex shoulder part of piston 1 is formed), piston 1 is transported to the left under difference in areas
It is dynamic, when the second outlet end 132 that piston 1 moves to third through flow hole 13 from right to left is communicated with oil back chamber 53, big valve core 4b's
Left end chamber is communicated by the second outlet end 132 of third through flow hole 13 with oil return inlet T, and small valve core 4a moves downward close port
15 right output port, big valve core 4b open the left port of valve port 15, and such right piston chamber 54 passes through the left port of valve port 15 and second
It is communicated with oil back chamber 53 after through flow hole 12, and then flows to oil return inlet T, such piston 1 starts to move right, when piston 1 is transported to the right
When moving the second outlet end 132 of third through flow hole 13 and being communicated with left piston chamber 52, big valve core 4b and small valve core 4a are in difference in areas
Under the action of (D1 be more than D2) move right together, big valve core 4b is re-closing off the left port of valve port 15, and small valve core 4a is opened again
The right output port of valve port 15 is opened, such piston 1 starts to move downward, and forms cycle.
In piston 1 drives left plunger 3a to move downward, right in line check valve 7b is opened, and fluid enters right plunger chamber 10b,
The fluid after supercharged of left plunger cavity 10a is discharged through left oil outlet one-way valve 6a simultaneously；Piston moves right similar.
Claims (2)
1. a kind of compact hydraulic booster, it is characterised in that：Including
Valve casing (5) with axial channel is provided with the oil inlet (P) and oil return opening being connected to axial channel on valve casing (5) side wall
(T), there is first annular interior omoplate (51) in the middle part of the inner hole wall of valve casing (5), oil inlet (P) and oil return opening (T) are located at the first ring
The left and right sides of omoplate (51) in shape；
Left cylinder body (2) with left plunger cavity (10a) and the right cylinder body (8) with right plunger chamber (10b), are connected to valve casing
(5) left and right ends of axial channel are provided with left oil inlet runner (21) and left high pressure hydraulic fluid port (H1) on left cylinder body (2), left into oil stream
The left in line check valve (7a) for allowing oil inlet fluid to enter left plunger cavity (10a), left high pressure hydraulic fluid port are equipped with only in road (23)
(H1) being equipped in only allows the left oil outlet one-way valve (6a) that be discharged from left plunger cavity (10a) of fluid, be provided on right cylinder body (8) right side into
Oil stream road (81) and right high pressure hydraulic fluid port (H2), interior be equipped with of right oil inlet runner (83) only allow oil inlet fluid to enter right plunger chamber
The right in line check valve (7b) of (10b), interior be equipped with of right high pressure hydraulic fluid port (H2) only allow fluid from the right side that right plunger chamber (10b) is discharged
Oil outlet one-way valve (6b)；The left oil inlet runner (21) passes through the first fuel feed hole (5a) for being located on valve casing (5) and oil inlet (P)
It is connected, the right oil inlet runner (81) is connected by the second fuel feed hole (5b) being located on valve casing (5) with oil inlet (P)；
With axial passage and piston (1) in T shape, be set in valve casing (5) and can left and right slide, the thin axle portion of piston (1)
It seals and coordinates with the internal perisporium of first annular interior omoplate (51), between the big axle portion periphery and the inner hole wall of valve casing (5) of piston (1)
Equipped with the first sealing ring (9a), left piston chamber is formed between the left side of the big axle portion of piston (1) and first annular interior omoplate (51)
(52), the right side of the big axle portion of piston (1) forms right piston chamber (54), and the left side of the thin axle portion of piston (1) forms oil back chamber
(53), oil inlet (P) is connected to left piston chamber (52), and oil return opening (T) is connected to oil back chamber (53), the axial channel of piston (1)
Internal perisporium is equipped with omoplate (14) in the second annular, and omoplate (14) surrounds valve port (15), the thin axle portion of piston (1) in the second annular
On be provided with the first through flow hole (11), the second through flow hole (12) and third through flow hole (13), the first through flow hole (11) is being connected to
Axial passage in second ring on the right side of omoplate (14) and left piston chamber (52), the second through flow hole (12) is being connected in the second annular
The input end of axial passage on the left of omoplate (14) and oil back chamber (53), third through flow hole (13) is located in valve port (15), third
There are three the outlet ends of through flow hole (13), one of them is another to be connected to first exit end (131) with right piston chamber (54) always
A second outlet end (132) whether be connected to oil back chamber (53) or left piston chamber (52) for selection, it is always with that third is a
The third outlet end (133) of the axial passage connection of omoplate (14) left end in second ring；
Big valve core (4b) and small valve core (4a), the diameter (D1) of big valve core (4b) are more than the diameter (D2) of valve port (15), big valve core
(4b) is located in the second annular on the left of omoplate (14) and is equipped with the second sealing ring (9b) between axial passage, big valve core (4b)
Whether left and right sliding can determine to open the left port of valve port (15), small valve core (4a) is in T shape, the major part position of small valve core (4a)
On the right side of omoplate (14) in the second annular, the thin axle portion of small valve core (4a) passes through valve port (15) to connect afterwards with big valve core (4b) screw thread
It connects, whether the left and right sliding of the enlarged head of small valve core (4a) can determine to open the right output port of valve port (15)；
Left plunger (3a) and right plunger (3b), left plunger (3a) be set to left cylinder body (2) in and can left and right slide, left plunger (3a)
It is interstitial fluid sealing cooperation between periphery and left cylinder body (2) endoporus, it is left to form left plunger cavity (10a) in left cylinder body (2)
The inner end of plunger (3a) connect with the left end of the axial passage of piston (1) and can be slid with piston (1) left and right；Right plunger (3b) is set
In the right cylinder body (8) and can left and right sliding, be that interstitial fluid seals and matches between the periphery and right cylinder body (8) endoporus of right plunger (3b)
It closes, to form right plunger chamber (10b), the right side of the inner end of right plunger (3b) and the axial passage of piston (1) in right cylinder body (8)
End connects and can be slid with piston (1) left and right.
2. compact hydraulic booster according to claim 1, it is characterised in that：It is moved to left in piston (1) through-flow to third
In the state that the second outlet end (132) in hole (13) is connected to oil back chamber (53), left side and the left cylinder body of the piston (1)
(2) bottom surface has spacing, is moved to right to the second outlet end (132) of third through flow hole (13) and left piston chamber in piston (1)
(52) in the state of being connected to, there is certain distance in the right side of the piston (1) with the bottom surface of right cylinder body (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810479402.2A CN108644162B (en) | 2018-05-18 | 2018-05-18 | A kind of compact hydraulic booster |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810479402.2A CN108644162B (en) | 2018-05-18 | 2018-05-18 | A kind of compact hydraulic booster |
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| CN108644162A true CN108644162A (en) | 2018-10-12 |
| CN108644162B CN108644162B (en) | 2019-10-08 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109611305A (en) * | 2018-12-01 | 2019-04-12 | 李军 | A kind of booster water pump |
| CN111075708A (en) * | 2019-12-26 | 2020-04-28 | 宁波真格液压科技有限公司 | High-pressure water pump |
| CN111120241A (en) * | 2019-12-30 | 2020-05-08 | 邵延荣 | Reciprocating booster pump |
| CN111502946A (en) * | 2020-04-22 | 2020-08-07 | 邵延荣 | Plunger type underground supercharger |
| CN112128152A (en) * | 2020-10-15 | 2020-12-25 | 郑州磨料磨具磨削研究所有限公司 | Ultrahigh-pressure low-speed boosting reciprocating supercharger |
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| CN111075708A (en) * | 2019-12-26 | 2020-04-28 | 宁波真格液压科技有限公司 | High-pressure water pump |
| CN111120241A (en) * | 2019-12-30 | 2020-05-08 | 邵延荣 | Reciprocating booster pump |
| CN111502946A (en) * | 2020-04-22 | 2020-08-07 | 邵延荣 | Plunger type underground supercharger |
| CN112128152A (en) * | 2020-10-15 | 2020-12-25 | 郑州磨料磨具磨削研究所有限公司 | Ultrahigh-pressure low-speed boosting reciprocating supercharger |
| CN112128152B (en) * | 2020-10-15 | 2022-10-21 | 郑州磨料磨具磨削研究所有限公司 | Ultrahigh-pressure low-speed boosting reciprocating supercharger |
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| CN108644162B (en) | 2019-10-08 |
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