CN201531486U - Hydraulic pressurized cylinder - Google Patents
Hydraulic pressurized cylinder Download PDFInfo
- Publication number
- CN201531486U CN201531486U CN2009202683676U CN200920268367U CN201531486U CN 201531486 U CN201531486 U CN 201531486U CN 2009202683676 U CN2009202683676 U CN 2009202683676U CN 200920268367 U CN200920268367 U CN 200920268367U CN 201531486 U CN201531486 U CN 201531486U
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- Prior art keywords
- piston
- oil
- cylinder
- hydraulic pressure
- push rod
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Abstract
The utility model discloses a hydraulic pressurized cylinder which comprises a cylinder body and a piston. The middle part of the inner chamber of the cylinder body is divided by a convex ring, so as to form a front cavity and a back cavity; correspondingly, the piston comprises a main piston positioned in the front cavity and a pressurize piston positioned in the back cavity, wherein an axial through hole serving as an oil feeding pipeline and an oil return pipeline of a main piston rodless cavity is formed on the push rod of the pressurize piston, and a controllable one-way valve is arranged in the through hole to control the oil feeding and oil return of the main piston rodless cavity, as well as maintenance of the state; and an oil inlet channel communicated with the back part of the through hole is arranged on a rear end cover, and a first oil circuit serving as an oil feeding and return circuit of a main piston rod chamber and a second oil circuit serving as an oil feeding and return circuit of a pressurize piston rod chamber are arranged on the cylinder body. The hydraulic pressurized cylinder provided by the utility model has compact structure and great pushing force.
Description
Technical field
The utility model relates to a kind of hydraulic pressure booster cylinder, specifically is the master cylinder that is applied to middle-size and small-size press machine, and it comprises: cylinder body has the inner chamber that forms by the front end housing that cooperates with this cylinder body and back cylinder cover; Piston cooperates by hydraulic control so that thrust to be provided with described inner chamber.
Background technique
Along with the develop rapidly of automotive industry, the mold matched industry has also obtained significant progress, correspondingly, in this mould industry, the working pressure and the working efficiency of press machine has been proposed more and more higher requirement.At present the oil hydraulic cylinder that press machine adopted that comes into operation in the industry all is a single cylinder list piston structure, adopts pressure that improves supporting hydraulic system and two approach of diameter that increase piston based on the oil hydraulic cylinder of this structure usually in order to obtain bigger working pressure.For the former, will inevitably higher requirement be proposed to hydraulic system, it is made and design cost improves greatly, and the hydraulic fluid pressure carried of hydraulic system crosses conference and cause pipeline leakage, and the maintenance cost in later stage is higher; Also existing simultaneously provides the needed energy consumption of relative elevated pressures hydraulic oil to improve.For the latter, certainly exist the problem that structure increases, bring a lot of difficulties to installation and maintenance.
No. 032377495 utility model patent of China has been put down in writing a kind of typical master cylinder that improves master cylinder pressure by the pressure that increases hydraulic oil system, the master cylinder of being put down in writing comprises main piston and is arranged on the interior speedup oil cylinder of piston rod of this main piston that the plunger diameter of speedup oil cylinder is less than the main piston diameter.Two oil cylinders that its essence is equivalent to connect, wherein said speedup oil cylinder because of cylinder diameter little under hydraulic oil same traffic condition its piston rod the very fast speed that compares can be arranged.But two its thrusts of oil cylinder of series connection depend on the thrust of the oil cylinder that thrust is less, and obviously the thrust of this master cylinder depends on the thrust of described speedup oil cylinder, and the thrust of its plunger causes its whole thrust less than normal because of its cylinder diameter is smaller.
Summary of the invention
Therefore, the utility model has proposed a kind of compact structure in order to overcome the above-mentioned defective of prior art, and the big hydraulic pressure booster cylinder of thrust.
The utility model is by the following technical solutions:
This model utility hydraulic pressure booster cylinder, it comprises:
Cylinder body has the inner chamber that forms by the front end housing that cooperates with this cylinder body and back cylinder cover;
Piston cooperates by hydraulic control so that thrust to be provided with described inner chamber;
Described inner chamber middle part is cut apart by a bulge loop, forms ante-chamber and back cavity, and correspondingly, described piston comprises main piston that is positioned at ante-chamber and the charged piston that is positioned at back cavity; Wherein, the push rod of charged piston has the axial penetration hole as oil-feed of main piston rodless cavity and return line, and is provided with controllable check valve keeps with oil-feed, oil return and the state of control main piston rodless cavity in this penetration hole;
Described rear end cover is provided with the oil inlet passage that is communicated with the rear portion of described penetration hole, is provided with on described cylinder body as first oil circuit on described main piston rod chamber oil inlet and oil return road with as second oil circuit on described charged piston rod chamber oil inlet and oil return road.
The utility model acts on a direction on certain object according to fluid pressure and this object are the principle that the area of the face effect of normal is directly proportional with above-mentioned direction, supply with under hydraulic oil hydraulic pressure and oil hydraulic cylinder cylinder diameter one stable condition in hydraulic system, can make it that higher thrust is provided.
Hydraulic pressure booster cylinder according to technical solutions of the utility model, its principle is, at first, described second oil circuit keeps certain pressure, the oil inlet passage oil-feed, the pressure that promotes described main piston can not overcome the charged piston Pressure in Back-pressure Cavity, charged piston is failure to actuate so, described one-way valve is in opening state, and described oil inlet passage has been communicated with the rodless cavity of described main piston, the described first oil circuit oil return simultaneously, main piston is descending so, until meeting obstructions, at this moment, the hydraulic fluid pressure of main piston rodless cavity is pressure that hydraulic system provided.Afterwards, when described pressure increases to when being enough to overcome described back pressure, first, the second oil circuit oil return, the charged piston action, closed check valve, charged piston moves to pressure balance always, the pressure that pressure by control charged piston rod chamber hydraulic oil can obtain main piston rodless cavity hydraulic oil this moment multiply by the product of pressure that hydraulic oil system provides again for the ratio of charged piston area and its push rod area, thereby, under the situation that does not increase cylinder diameter and hydraulic system pressure, make the rodless cavity of main piston can obtain to have above-mentioned pressure in the descending process of charged piston, and then, the increase hydraulic system pressure that can overcome in the background technique to be mentioned or increase the problem that cylinder diameter brought.
Obviously a bit be, here the stroke of charged piston does not need too greatly, the purpose of its working stroke is to form said pressure balance, the existence of charged piston makes the axial dimensional changes of oil hydraulic cylinder also little, structure also is compact.And in the variation of the axial size of oil hydraulic cylinder, the variation on the working stroke direction of press machine just makes above-mentioned variation very little to the overall structure influence of press machine owing to the space of press machine on this direction is very big.
Above-mentioned hydraulic pressure booster cylinder is provided with the push rod coaxial with described penetration hole on described rear end cover, so that the spool of described one-way valve is backed down by this push rod when described charged piston is positioned at back stop state.
Above-mentioned hydraulic pressure booster cylinder, described push rod is fixed on the described rear end cover.
Above-mentioned hydraulic pressure booster cylinder, push rod backward end at described spool is provided with blind hole, and have a plurality of through holes uniformly at the periphery of this blind pore wall, and the spring seat of described one-way valve is packed in the described penetration hole, establishes the passage that is used to be communicated with described blind hole and described main piston rodless cavity in this spring seat.
Above-mentioned hydraulic pressure booster cylinder, the push rod of described charged piston cooperates with described bulge loop by the stuffing box gland with high pressure static seal.
Above-mentioned hydraulic pressure booster cylinder, described penetration hole and the coaxial setting of described charged piston.
Above-mentioned hydraulic pressure booster cylinder, the pipe arrangement end of this pressurized cylinder is at described back cylinder cover rear side.
Above-mentioned hydraulic pressure booster cylinder, the push rod of described main piston and front cover fitting surface are provided with dust ring, wear ring, piston packing, wear ring from front to back successively.
Above-mentioned hydraulic pressure booster cylinder, described piston packing are a plurality of seal rings.
Description of drawings
Below in conjunction with Figure of description the technical solution of the utility model is further elaborated, makes those skilled in the art better understand the utility model, wherein:
Fig. 1 cuts open structural representation for the master of hydraulic pressure booster cylinder in the utility model preferred embodiment.
Fig. 2 is the structural representation of spool.
Fig. 3 to Fig. 6 has expressed pressurizing hydraulic cylinder operating on low voltage state, high-pressure work state, charged piston backhaul A-stage, the structural representation of charged piston backhaul later stage state and the working condition signal of corresponding hydraulic oil successively.
Among the figure: 1, back cylinder cover, 2, the O RunddichtringO, 3, wear ring, 4, piston packing, 5, cylinder body, 6, the high pressure static seal, 7, stuffing box gland, 8, the main piston seal ring, 9, main piston, 10, first oil circuit, 11, the technology plug is stifled, 12, front end housing, 13, dust ring, 14, wear ring, 15, piston packing, 16, the O RunddichtringO, 17, high-pressure piston rod seal ring, 18, the technology plug is stifled, 19, second oil circuit, 20, spring seat, 21, spring, 22, charged piston, 23, push rod.
Embodiment
With reference to Figure of description 1, it shows a kind of hydraulic pressure booster cylinder, and it comprises:
Piston cooperates by hydraulic control so that thrust to be provided with described inner chamber;
Described inner chamber middle part is cut apart by a bulge loop, forms ante-chamber and back cavity, and correspondingly, described piston comprises main piston 9 that is positioned at ante-chamber and the charged piston 22 that is positioned at back cavity; Wherein, the push rod of charged piston has the axial penetration hole as oil-feed of main piston rodless cavity and return line, and is provided with controllable check valve keeps with oil-feed, oil return and the state of control main piston rodless cavity in this penetration hole;
Described rear end cover is provided with advancing of being communicated with the rear portion of described penetration hole, oil circuit passage 25, is provided with on described cylinder body as first oil circuit 10 on described main piston rod chamber oil inlet and oil return road with as second oil circuit 19 on described charged piston rod chamber oil inlet and oil return road.
About described bulge loop, need according under the high-pressure work state, the difference of main piston rodless cavity pressure and charged piston rod chamber pressure is provided with sealing grade.Here need to prove, said high pressure is a relative notion with low pressure, be used to distinguish the pressure gap under two kinds of working staties of this hydraulic pressure booster cylinder, certainly, in press machine master cylinder technical field, the needed pressure of its work is very big, such as the master cylinder of the dull and stereotyped puncturing machine of 1200kN, require its maximum thrust greater than 1200kN, the pressure of main piston rodless cavity will surpass 40.5Mpa.According to an embodiment of this programme, the Maximum operating pressure of hydraulic system is 19MPa, and the diameter of main piston is 200mm, and diameter of piston rod 175mm, the diameter of charged piston are 200mm, and diameter of piston rod is 125mm.Simultaneously, according to technological requirement, the main piston rod chamber remains the working pressure of 8MPa in the course of the work.The common oil hydraulic cylinder of identical working pressure need be under the prerequisite of 250mm at cylinder diameter then, and the pressure that hydraulic system is supplied with also must could satisfy the requirement of press machine more than 25MPa.By comparison, this programme can reduce hydraulic fluid flow rate 36%, reduces pressure 24%, and energy-saving effect is conspicuous with the effect that reduces master cylinder size aspect.
For the ease of controlling described one-way valve, on described rear end cover, be provided with the push rod 24 coaxial with described penetration hole, so that the spool 23 of described one-way valve is backed down by this push rod when described charged piston is positioned at back stop state, thereby, after charged piston resetted, the pressure oil of main piston rodless cavity just can freely be got back to drainback passage.
An embodiment of this programme, described push rod is fixed on the described rear end cover.The state of this moment can be understood as the best of one-way valve work and opens big or small position, has also just determined push rod to lean out the size of back lever.The push rod why employing fixedly installs, purpose is to reduce the complexity of control system.And at working stage, described one-way valve is after charged piston moves ahead a segment distance, and one-way valve is closed under the effect of its restoring force voluntarily.In addition, predictably, can there be a small amount of oil return of main piston rodless cavity in this stage, and increases the motion speed of charged piston.
For simplified structure, Figure of description 2 is a kind of structural representation of described spool, push rod backward end at this spool is provided with blind hole 26, and have a plurality of through holes uniformly at the periphery of this blind pore wall, and the spring seat of described one-way valve is packed in the described penetration hole, establishes the passage that is used to be communicated with described blind hole and described main piston rodless cavity in this spring seat.At this, described penetration hole both had been the mountion plate of one-way valve, also partly constituted the pipeline of one-way valve.Certainly, those skilled in the art can also adopt conventional one-way valve structures, an one-way valve just is set in described penetration hole, but the model utility people thinks that common one-way valve sealing grade is low, is difficult to obtain suitable sealing grade.And this programme, obvious needed valve core structure is convenient to be provided with Sealing axially relatively big, obtains higher sealing grade easily.Conventional one-way valve can only be that a kind of deterioration of this programme substitutes, and also should fall within the protection domain of the present utility model in principle.
Further, the push rod of described charged piston cooperates with described bulge loop by the stuffing box gland 7 with high pressure static seal, to obtain higher sealing grade, here to the high pressure that stuffing box gland limited, should be not less than the pressure maximum of main piston rodless cavity.
For simplified structure, described penetration hole and the coaxial setting of described charged piston because the existence of push rod, so oil inlet passage just can not with the coaxial setting of main piston, can only eccentric setting.
For the ease of pipe arrangement, the pipe arrangement end of this pressurized cylinder is at described back cylinder cover rear side, correspondingly, described first oil circuit and second oil circuit should comprise be positioned at Boring mill to part.
The push rod of described main piston and front cover fitting surface are provided with dust ring 13, wear ring 14, piston packing 15, wear ring from front to back successively.Similarly, charged piston also needs to be provided with wear ring 3 and piston packing 4, and its push rod need be provided with high-pressure piston rod seal ring 17.
Described piston packing is a plurality of seal rings, to increase the reliability of sealing.
Figure of description 3 to Fig. 6 has been expressed pressurizing hydraulic cylinder operating on low voltage state, high-pressure work state, charged piston backhaul A-stage, the structural representation of charged piston backhaul later stage state and the working condition signal of corresponding hydraulic oil successively, Fig. 1 has then represented the reset condition of hydraulic pressure booster cylinder, rod chamber for charged piston, according to technological requirement, pressure is set at 2.5 ~ 3.5MPa.To enter the high-pressure work state at state as shown in Figure 4 for this hydraulic pressure booster cylinder.During backhaul, first, second oil circuit oil-feed, the oil inlet passage oil return, until the back stop is arrived in supercharging work, second oil circuit is closed, nature, described one-way valve has been opened or has been closed the back unlatching according to being controlled at second oil circuit, this moment, first oil circuit continued oil-feed, arrived the after date stop until main piston, thereby made hydraulic pressure booster cylinder get back to original state.
Claims (9)
1. hydraulic pressure booster cylinder, it comprises:
Cylinder body (5) has the inner chamber that forms by the front end housing (12) that cooperates with this cylinder body and back cylinder cover (1);
Piston cooperates by hydraulic control so that thrust to be provided with described inner chamber;
It is characterized in that:
Described inner chamber middle part is cut apart by a bulge loop, forms ante-chamber and back cavity, and correspondingly, described piston comprises main piston (9) that is positioned at ante-chamber and the charged piston (22) that is positioned at back cavity; Wherein, the push rod of charged piston has the axial penetration hole as oil-feed of main piston rodless cavity and return line, and is provided with controllable check valve keeps with oil-feed, oil return and the state of control main piston rodless cavity in this penetration hole;
Described rear end cover is provided with the oil inlet passage (25) that is communicated with the rear portion of described penetration hole, is provided with on described cylinder body as first oil circuit (10) on described main piston rod chamber oil inlet and oil return road with as second oil circuit (19) on described charged piston rod chamber oil inlet and oil return road.
2. hydraulic pressure booster cylinder according to claim 1 is characterized in that: be provided with the push rod coaxial with described penetration hole (24) on described rear end cover, so that the spool of described one-way valve (23) is backed down by this push rod when described charged piston is positioned at back stop state.
3. hydraulic pressure booster cylinder according to claim 2 is characterized in that: described push rod is fixed on the described rear end cover.
4. hydraulic pressure booster cylinder according to claim 3, it is characterized in that: the push rod backward end at described spool is provided with blind hole (26), and have a plurality of through holes uniformly at the periphery of this blind pore wall, and the spring seat of described one-way valve is packed in the described penetration hole, establishes the passage that is used to be communicated with described blind hole and described main piston rodless cavity in this spring seat.
5. hydraulic pressure booster cylinder according to claim 4 is characterized in that: the push rod of described charged piston cooperates with described bulge loop by the stuffing box gland (7) with high pressure static seal.
6. hydraulic pressure booster cylinder according to claim 5 is characterized in that: described penetration hole and the coaxial setting of described charged piston.
7. according to the described hydraulic pressure booster cylinder of one of claim 1 to 6, it is characterized in that: the pipe arrangement end of this pressurized cylinder is at described back cylinder cover rear side.
8. hydraulic pressure booster cylinder according to claim 7 is characterized in that: the push rod of described main piston and front cover fitting surface are provided with dust ring (13), wear ring (14), piston packing (15), wear ring from front to back successively.
9. hydraulic pressure booster cylinder according to claim 8 is characterized in that: described piston packing is a plurality of seal rings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202683676U CN201531486U (en) | 2009-11-21 | 2009-11-21 | Hydraulic pressurized cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202683676U CN201531486U (en) | 2009-11-21 | 2009-11-21 | Hydraulic pressurized cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201531486U true CN201531486U (en) | 2010-07-21 |
Family
ID=42526890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202683676U Expired - Lifetime CN201531486U (en) | 2009-11-21 | 2009-11-21 | Hydraulic pressurized cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201531486U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725580B (en) * | 2009-11-21 | 2012-04-04 | 潘孝敏 | Hydraulic pressure cylinder |
| CN105937510A (en) * | 2016-06-23 | 2016-09-14 | 莱州兴达液压机械科技有限公司 | Rapid pressurizing oil cylinder |
| CN108644162A (en) * | 2018-05-18 | 2018-10-12 | 东莞海特帕沃液压科技有限公司 | A kind of compact hydraulic booster |
-
2009
- 2009-11-21 CN CN2009202683676U patent/CN201531486U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101725580B (en) * | 2009-11-21 | 2012-04-04 | 潘孝敏 | Hydraulic pressure cylinder |
| CN105937510A (en) * | 2016-06-23 | 2016-09-14 | 莱州兴达液压机械科技有限公司 | Rapid pressurizing oil cylinder |
| CN108644162A (en) * | 2018-05-18 | 2018-10-12 | 东莞海特帕沃液压科技有限公司 | A kind of compact hydraulic booster |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100721 Effective date of abandoning: 20091121 |