CA1202822A - Apparatus for generating high pressure fluid - Google Patents
Apparatus for generating high pressure fluidInfo
- Publication number
- CA1202822A CA1202822A CA000410609A CA410609A CA1202822A CA 1202822 A CA1202822 A CA 1202822A CA 000410609 A CA000410609 A CA 000410609A CA 410609 A CA410609 A CA 410609A CA 1202822 A CA1202822 A CA 1202822A
- Authority
- CA
- Canada
- Prior art keywords
- high pressure
- pressure fluid
- intensifying
- return valve
- supply conduit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/005—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using two or more pumping pistons
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Reciprocating Pumps (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The present invention provides an apparatus for con-tinuously generating high pressure fluid comprising a pair of juxtaposed intensifying pumps which operate in opposition, each intensifying pump comprising an intensifying cylinder in which a piston or a ram drive a driving gear reciprocably moves.
In this apparatus, a discharge port for the high pressure fluid in each intensifying cylinder is connected to a collecting chamber for high pressure fluid via a non-return valve. The collecting chamber for high pressure fluid is connected to a supply conduit for high pressure fluid via a non-return valve, and an accumulator is present in said supply conduit for high pressure fluid.
The present invention provides an apparatus for con-tinuously generating high pressure fluid comprising a pair of juxtaposed intensifying pumps which operate in opposition, each intensifying pump comprising an intensifying cylinder in which a piston or a ram drive a driving gear reciprocably moves.
In this apparatus, a discharge port for the high pressure fluid in each intensifying cylinder is connected to a collecting chamber for high pressure fluid via a non-return valve. The collecting chamber for high pressure fluid is connected to a supply conduit for high pressure fluid via a non-return valve, and an accumulator is present in said supply conduit for high pressure fluid.
Description
~;~.0;2.~32~
This invention relates to an apparatus for con-tinuously genexating high pressure fluid comprising a paix of juxta>osed interlsify:ing pulnps, each pUMp comL:)ri Sirlg an inten-si~yirlg cylinder in which a piston or a ram is recip~ocably mounted and driven by a driving gear such that the pumps oper-ate in opposition.
; lleretofore, when the generation and supply of the high pressure fluid are continuously effected by opera~ing a pair of intensifying pumps each including an intensjfying cylinder al-ternately and in opposition, ~he generation of high pressure fluid in the respective intensifying cylinder momentarily stops at the switchover of the movement of the pis-ton or ram from an , upper dead point or a lower dead point in the respective inten-I sifying cylinder. Therefore, a sudden change of flow and pres-sure occurs within a conduit and a high intensity sound is generated. In order to smooth the operation by decreasing such high intensity sound just before a piston or a ram in one inten-sifying cylinder reaches an uppe. dead point, pushing of the piston or a ram in the other intensifying cylinder is started.
~lowever, the occurrence of impacl: pressure al: the tillle of of the beginnirlg of rising, i.e. time of beginnillg of pushing in of respective piston or ram is unavoidable. Also, so that the intellsifyirlg cylinder may be connected directly with a supply con(luit pipe for high pressure fluid through a non-return valve, khe impact pressure extends within the conduit pipe and smooth operatiorl is impeded. In order to E)revent such noise and provide a smoothness of an operation, an accumulator is used, but the volume of the accumulator must be made very large so as to overcome the irnpact pressure.
'rhe present invention provides an apparatus for the generation of high pressure which avoids noise and has a srnooth-ness in operation.
1~0~82~
The present invention also provides for the miniaturiza-tion of the apparatus whilst performing the operation with good energy efficiency.
According to the present invention there is provided in an apparatus for continuously generating high pressure fluid, com-prising a pair of juxtaposed intensifying pumps each comprising an intensifying cylinder in which a piston or a ram is mounted for reciprocation, said pistons being connected to a driving gear adapted to operate said pumps in opposition, a discharge port for high pressure fluid being present in each intensifying cylinder which port is connected to a collecting chamber for high pres-sure fluid via a non-return valve, said collecting chamber being connected to a supply conduit for high pressure fluid via a non-return valve, an accumulator being provided in said supply conduit.
Thus in accordance with the present invention a dis-charge port for high pressure fluid in the respective intensifying cylinder is connected to a collecting chamber for high pressure fluid via a non-return valve. The collecting chamber for high pressure fluid is Eurther connected to a supply conduit for high pressure fluid via a non-return valve and an accumulator is pre-sent in the .supply conduit for high pressure fluid.
The present invention will be further illustrated, by way of the accompanying drawing, in which:-Fig. 1 is a schema-tic drawing of an apparatus according to one embodiment of the present invention.
Referring to Fig. 1, intensifying cylinders 1 and 2 each have a piston or ram 3 and 4 respectively reciprocably mounted therein. The pistons or rams 3 and 4 are connected with a cam mechanism such that pistons or rams 3 and 4 operated in opposition by a driving gear, for example cams 5 and 6 which are adapted to operate the pistons or rams simultaneously in opposition. The respective intensifying chambers 7 and 8 in the intensifying cylin-~v~z~
ders 1 and 2 are provided with fluid suction ports 11 and 12 hav-ing non-return valves 9 and 10 and discharge ports 13 and 14 for high pressure ~luid. The discharge ports 13 and 14 of the re-spective intensifying cylinders 1 and 2 are connected with a collecting cha~ber 17 for high pressure fluid via non-return valves 15 and 16 respectively. The collecting chamber 17 for high pres-sure fluid is connected with a supply conduit 19 for high pres-sure fluid via a non-return valve 18, and an accumulator 20 is arranged in the supply conduit 19 for high pressure fluid.
The collecting chamber 17 for high pressure fluid is common to the respective intensifying cylinders 1 and 2. However, the collecting chamber 17 for high pressure fluid may be replaced with separate collecting chambers for the respective intensifying cylinders and the respective gathering chambers for high pressure fluid may be respectively connected with the supply conduit 19 for high pressure fluid through non-return valves.
A safety valve 21 as in the collecting chamber 17 for high pressure fluid and an exhaust port 22 is present in the supply conduit l9 for high pressure fluid.
In operation of the apparatus the piston or rams 3 and 4 are operated in opposition by rotation of the cams 5 and 6 of the driving gear. Fluid is sucked into the intenslfying chamber 7 and 8 from the suction ports 11 and 12 via non-return valves 9 and lO on descent of the piston or rams 3 and 4, and high pres-sure fluid is forced into the collecting chamber 17 for high pres-sure fluid through the discharge ports 13 and 14 for high pressure fluid while the fluid sucked in the intensifying chambers 7 and 8 is intensified on the ascent of the piston or rams3 and 4. Sub-sequently the high pressure fluid reaches the supply conduit 19 Eor hiyh p~essure fluid via the non-return valve 18 and is exhaust-ed through the exhaust port 22.
Further,in detail in the intensifying cylinder 1, high pressure fluid intensified by the ascent of the piston or ram 3 opens the non-return valve 15 on overcoming the pressure in the collecting chamber 17 and passes into the collecting ch~r 17 for high pressure fluid. The pressure in the collecting chamber 17 opens the non-return valve 18 with increasing pressure and passes into the supply conduit 19. However, when the piston or ram 3 reaches the upper dead point and stops, the pressure in the inten-sifying chamber 7 decreases and the non-return valve 15 closes.
Also, the pressure in the collecting chamber 17 decreases momen-tarily by linking with this operation, and the pressure in thesupply conduit 19 overcomes the pressure in the collecting chamber 17 by means of the accumulator 20 and closes the non-return valve 18. Subsequently, the non-return valve 16 opens with the pres-sure of high pressure fluid generated by the ascent of the piston or ram 4 in the intensifying cylinder 2, and the aforesaid condi-tions are repeated.
The high impact pressure momentarily generated when the pistons or rams 3 and 4 ascent from the lower dead point is given a buffer action by passing in the collecting chamber 17, the pressure change in the supply conduit 19 and the noise of the impact pressure is prevented and operation of the apparatus is smoothly effected.
The driving gear of the piston or ram in the intensify-ing cylinder may use a device having a crank mechanism, oil pres-sure or cam mechanism. ~owever, the speed change of reciprocation becomes larger with a displacement of the angle from 0 to 180 by the rotation of crank in the crank mechanism, and it is not necessarily appropriate that the crank mechanism is utilized in the apparatus for generating ultrahigh pressure. An oil pressure device is often utilized for the drive of the apparatus for gen-erating ultrahigh pressure, but this device is not necessarily simple, and also frequently an energy loss due to a time lag in 82~
the switchover of oil pressure occurs. A device having a cam converts the rotation of motive power into a direct reciprocation.
It is simple to determine the shape of cam to regulate the re-ciprocation of the piston or ram for operation with good energy efficiency, and this device can precisely effect power transmis-sion using a simple construction.
As mentioned above, in the present invention, the dis-charge ports for high pressure fluid for the intensifying cylin-ders of the juxtaposed intensifying pumps, so as to operate in opposition, are connected with a collecting chamber for high pressure fluid via the non-return valves. Further, the collecting chamber for high pressure fluid is connected with the supply con-duit for high pressure fluid via a non-return valve and together the impact pressure which is generated at initiation of the in-tensifying of fluid by the intensifying cylinder isgiven buffer action because an accumulator is present in the supply conduit for high pressure fluid. Operation of the apparatus can be per-formed accurately and smoothly while noise is prevented. Further when a driving gear based on the cam mechanism is used, it is possible to miniaturize an apparatus with good encrgy efficiency.
This invention relates to an apparatus for con-tinuously genexating high pressure fluid comprising a paix of juxta>osed interlsify:ing pulnps, each pUMp comL:)ri Sirlg an inten-si~yirlg cylinder in which a piston or a ram is recip~ocably mounted and driven by a driving gear such that the pumps oper-ate in opposition.
; lleretofore, when the generation and supply of the high pressure fluid are continuously effected by opera~ing a pair of intensifying pumps each including an intensjfying cylinder al-ternately and in opposition, ~he generation of high pressure fluid in the respective intensifying cylinder momentarily stops at the switchover of the movement of the pis-ton or ram from an , upper dead point or a lower dead point in the respective inten-I sifying cylinder. Therefore, a sudden change of flow and pres-sure occurs within a conduit and a high intensity sound is generated. In order to smooth the operation by decreasing such high intensity sound just before a piston or a ram in one inten-sifying cylinder reaches an uppe. dead point, pushing of the piston or a ram in the other intensifying cylinder is started.
~lowever, the occurrence of impacl: pressure al: the tillle of of the beginnirlg of rising, i.e. time of beginnillg of pushing in of respective piston or ram is unavoidable. Also, so that the intellsifyirlg cylinder may be connected directly with a supply con(luit pipe for high pressure fluid through a non-return valve, khe impact pressure extends within the conduit pipe and smooth operatiorl is impeded. In order to E)revent such noise and provide a smoothness of an operation, an accumulator is used, but the volume of the accumulator must be made very large so as to overcome the irnpact pressure.
'rhe present invention provides an apparatus for the generation of high pressure which avoids noise and has a srnooth-ness in operation.
1~0~82~
The present invention also provides for the miniaturiza-tion of the apparatus whilst performing the operation with good energy efficiency.
According to the present invention there is provided in an apparatus for continuously generating high pressure fluid, com-prising a pair of juxtaposed intensifying pumps each comprising an intensifying cylinder in which a piston or a ram is mounted for reciprocation, said pistons being connected to a driving gear adapted to operate said pumps in opposition, a discharge port for high pressure fluid being present in each intensifying cylinder which port is connected to a collecting chamber for high pres-sure fluid via a non-return valve, said collecting chamber being connected to a supply conduit for high pressure fluid via a non-return valve, an accumulator being provided in said supply conduit.
Thus in accordance with the present invention a dis-charge port for high pressure fluid in the respective intensifying cylinder is connected to a collecting chamber for high pressure fluid via a non-return valve. The collecting chamber for high pressure fluid is Eurther connected to a supply conduit for high pressure fluid via a non-return valve and an accumulator is pre-sent in the .supply conduit for high pressure fluid.
The present invention will be further illustrated, by way of the accompanying drawing, in which:-Fig. 1 is a schema-tic drawing of an apparatus according to one embodiment of the present invention.
Referring to Fig. 1, intensifying cylinders 1 and 2 each have a piston or ram 3 and 4 respectively reciprocably mounted therein. The pistons or rams 3 and 4 are connected with a cam mechanism such that pistons or rams 3 and 4 operated in opposition by a driving gear, for example cams 5 and 6 which are adapted to operate the pistons or rams simultaneously in opposition. The respective intensifying chambers 7 and 8 in the intensifying cylin-~v~z~
ders 1 and 2 are provided with fluid suction ports 11 and 12 hav-ing non-return valves 9 and 10 and discharge ports 13 and 14 for high pressure ~luid. The discharge ports 13 and 14 of the re-spective intensifying cylinders 1 and 2 are connected with a collecting cha~ber 17 for high pressure fluid via non-return valves 15 and 16 respectively. The collecting chamber 17 for high pres-sure fluid is connected with a supply conduit 19 for high pres-sure fluid via a non-return valve 18, and an accumulator 20 is arranged in the supply conduit 19 for high pressure fluid.
The collecting chamber 17 for high pressure fluid is common to the respective intensifying cylinders 1 and 2. However, the collecting chamber 17 for high pressure fluid may be replaced with separate collecting chambers for the respective intensifying cylinders and the respective gathering chambers for high pressure fluid may be respectively connected with the supply conduit 19 for high pressure fluid through non-return valves.
A safety valve 21 as in the collecting chamber 17 for high pressure fluid and an exhaust port 22 is present in the supply conduit l9 for high pressure fluid.
In operation of the apparatus the piston or rams 3 and 4 are operated in opposition by rotation of the cams 5 and 6 of the driving gear. Fluid is sucked into the intenslfying chamber 7 and 8 from the suction ports 11 and 12 via non-return valves 9 and lO on descent of the piston or rams 3 and 4, and high pres-sure fluid is forced into the collecting chamber 17 for high pres-sure fluid through the discharge ports 13 and 14 for high pressure fluid while the fluid sucked in the intensifying chambers 7 and 8 is intensified on the ascent of the piston or rams3 and 4. Sub-sequently the high pressure fluid reaches the supply conduit 19 Eor hiyh p~essure fluid via the non-return valve 18 and is exhaust-ed through the exhaust port 22.
Further,in detail in the intensifying cylinder 1, high pressure fluid intensified by the ascent of the piston or ram 3 opens the non-return valve 15 on overcoming the pressure in the collecting chamber 17 and passes into the collecting ch~r 17 for high pressure fluid. The pressure in the collecting chamber 17 opens the non-return valve 18 with increasing pressure and passes into the supply conduit 19. However, when the piston or ram 3 reaches the upper dead point and stops, the pressure in the inten-sifying chamber 7 decreases and the non-return valve 15 closes.
Also, the pressure in the collecting chamber 17 decreases momen-tarily by linking with this operation, and the pressure in thesupply conduit 19 overcomes the pressure in the collecting chamber 17 by means of the accumulator 20 and closes the non-return valve 18. Subsequently, the non-return valve 16 opens with the pres-sure of high pressure fluid generated by the ascent of the piston or ram 4 in the intensifying cylinder 2, and the aforesaid condi-tions are repeated.
The high impact pressure momentarily generated when the pistons or rams 3 and 4 ascent from the lower dead point is given a buffer action by passing in the collecting chamber 17, the pressure change in the supply conduit 19 and the noise of the impact pressure is prevented and operation of the apparatus is smoothly effected.
The driving gear of the piston or ram in the intensify-ing cylinder may use a device having a crank mechanism, oil pres-sure or cam mechanism. ~owever, the speed change of reciprocation becomes larger with a displacement of the angle from 0 to 180 by the rotation of crank in the crank mechanism, and it is not necessarily appropriate that the crank mechanism is utilized in the apparatus for generating ultrahigh pressure. An oil pressure device is often utilized for the drive of the apparatus for gen-erating ultrahigh pressure, but this device is not necessarily simple, and also frequently an energy loss due to a time lag in 82~
the switchover of oil pressure occurs. A device having a cam converts the rotation of motive power into a direct reciprocation.
It is simple to determine the shape of cam to regulate the re-ciprocation of the piston or ram for operation with good energy efficiency, and this device can precisely effect power transmis-sion using a simple construction.
As mentioned above, in the present invention, the dis-charge ports for high pressure fluid for the intensifying cylin-ders of the juxtaposed intensifying pumps, so as to operate in opposition, are connected with a collecting chamber for high pressure fluid via the non-return valves. Further, the collecting chamber for high pressure fluid is connected with the supply con-duit for high pressure fluid via a non-return valve and together the impact pressure which is generated at initiation of the in-tensifying of fluid by the intensifying cylinder isgiven buffer action because an accumulator is present in the supply conduit for high pressure fluid. Operation of the apparatus can be per-formed accurately and smoothly while noise is prevented. Further when a driving gear based on the cam mechanism is used, it is possible to miniaturize an apparatus with good encrgy efficiency.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. In an apparatus for continuously generating high pressure fluid, comprising a pair of juxtaposed intensifying pumps each comprising an intensifying cylinder in which a piston or a ram is mounted for reciprocation, said pistons being connected to a driving gear adapted to operate said pumps in opposition, a discharge port for high pressure fluid being present in each in-tensifying cylinder which port is connected to a collecting cham-ber for high pressure fluid via a non-return valve, said collect-ing chamber being connected to a supply conduit for high pressure fluid via a non-return valve, an accumulator being provided in said supply conduit.
2. An apparatus according to claim 1, wherein said collecting chamber is a common chamber for both said intensifying cylinders.
3. An apparatus according to claim 1 or 2, in which the driving mechanism is a cam mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2180882A JPS58142001A (en) | 1982-02-12 | 1982-02-12 | High pressure fluid generating device |
| JP57-021808 | 1982-02-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1202822A true CA1202822A (en) | 1986-04-08 |
Family
ID=12065348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000410609A Expired CA1202822A (en) | 1982-02-12 | 1982-09-01 | Apparatus for generating high pressure fluid |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS58142001A (en) |
| AU (1) | AU8718382A (en) |
| CA (1) | CA1202822A (en) |
| DE (1) | DE3234950A1 (en) |
| GB (1) | GB2115076B (en) |
| SE (1) | SE8204320L (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650063B (en) * | 2016-01-28 | 2019-01-18 | 中国重型机械研究院股份公司 | Extruder hydraulic system pressure fluctuates reduction method |
| CN106762981B (en) * | 2016-12-27 | 2018-03-20 | 重庆维庆液压机械有限公司 | Detection means for hydraulic cylinder |
| CN106762982B (en) * | 2016-12-27 | 2018-03-20 | 重庆维庆液压机械有限公司 | The detection method of hydraulic cylinder body |
-
1982
- 1982-02-12 JP JP2180882A patent/JPS58142001A/en active Pending
- 1982-07-14 SE SE8204320A patent/SE8204320L/en not_active Application Discontinuation
- 1982-07-30 GB GB08222126A patent/GB2115076B/en not_active Expired
- 1982-08-16 AU AU87183/82A patent/AU8718382A/en not_active Abandoned
- 1982-09-01 CA CA000410609A patent/CA1202822A/en not_active Expired
- 1982-09-21 DE DE19823234950 patent/DE3234950A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| SE8204320D0 (en) | 1982-07-14 |
| DE3234950A1 (en) | 1983-08-25 |
| JPS58142001A (en) | 1983-08-23 |
| GB2115076B (en) | 1985-08-29 |
| AU8718382A (en) | 1983-08-18 |
| GB2115076A (en) | 1983-09-01 |
| SE8204320L (en) | 1983-08-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |