CN111980986A - Single-rod high-frequency impact test hydraulic cylinder - Google Patents
Single-rod high-frequency impact test hydraulic cylinder Download PDFInfo
- Publication number
- CN111980986A CN111980986A CN202010836841.1A CN202010836841A CN111980986A CN 111980986 A CN111980986 A CN 111980986A CN 202010836841 A CN202010836841 A CN 202010836841A CN 111980986 A CN111980986 A CN 111980986A
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- China
- Prior art keywords
- guide sleeve
- rod
- hydraulic cylinder
- cylinder barrel
- frequency impact
- 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.)
- Pending
Links
- 238000009863 impact test Methods 0.000 title claims abstract description 39
- 230000003068 static effect Effects 0.000 claims abstract description 42
- 238000007789 sealing Methods 0.000 claims description 16
- 230000002706 hydrostatic effect Effects 0.000 claims description 7
- 230000004044 response Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 68
- 239000010720 hydraulic oil Substances 0.000 description 8
- 239000000428 dust Substances 0.000 description 7
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- 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
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1471—Guiding means other than in the end cap
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J10/00—Engine or like cylinders; Features of hollow, e.g. cylindrical, bodies in general
- F16J10/02—Cylinders designed to receive moving pistons or plungers
Abstract
The invention discloses a single-rod high-frequency impact test hydraulic cylinder which comprises a cylinder barrel, a piston rod, a guide sleeve, at least one static pressure oil port and at least one static pressure oil cavity, wherein the cylinder barrel is of a hollow columnar structure, a large cavity oil port and a small cavity oil port are arranged on one side outside the circumference of the cylinder barrel, one end of the cylinder barrel is an open end, the other end of the cylinder barrel is a closed end, the piston rod is arranged in the cylinder barrel, one end of the piston rod can extend out of the open end of the cylinder barrel, the guide sleeve is of a hollow annular structure, the guide sleeve is sleeved on a rod body of the piston rod and is positioned on one side of the open end of the cylinder barrel, the static pressure oil port is arranged on the outer. The single-rod high-frequency impact test hydraulic cylinder has the advantages of high frequency response, low friction, long service life and the like.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a single-rod high-frequency impact test hydraulic cylinder.
Background
The current oil cylinder for impact test has low working frequency and is difficult to meet the requirement of high-frequency impact test. The servo actuator can realize high-frequency impact working conditions, but the servo actuator adopts a double-rod structure to output the same thrust and needs a larger cylinder diameter, so that the requirement on installation space is high. Generally, a servo valve is required to control action, the internal and external connection structures are complex and fixed and often comprise detection components such as a displacement sensor and a load sensor, so that the compactness and customization requirements are difficult to realize, the cost is high, and the application working condition that the servo valve is not attached and only used for impact testing is caused.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
Therefore, the single-rod high-frequency impact test hydraulic cylinder has the advantages of compact structure, small occupied space, long service life, high reliability, higher cost and the like.
According to the embodiment of the invention, the single-rod high-frequency impact test hydraulic cylinder comprises: the cylinder barrel is of a hollow columnar structure, a large cavity oil port and a small cavity oil port are formed in one side outside the circumference of the cylinder barrel, and one end of the cylinder barrel is an open end while the other end is a closed end; the piston rod is arranged in the cylinder barrel, and one end of the piston rod can extend out of the open end of the cylinder barrel; the guide sleeve is of a hollow annular structure, and is sleeved on the rod body of the piston rod and positioned on one side of the opened end of the cylinder barrel; the static pressure oil port is arranged on the outer circumference of the guide sleeve; and the static pressure oil chamber is arranged on the inner side of the guide sleeve.
According to the single-rod high-frequency impact test hydraulic cylinder disclosed by the embodiment of the invention, the cylinder barrel, the piston rod, the guide sleeve, the at least one static pressure oil port and the at least one static pressure oil cavity are combined, and opposite moments generated by the distribution of hydraulic oil in the static pressure oil cavities are utilized, so that extremely low friction force generated during the operation of the single-rod high-frequency impact test hydraulic cylinder and the wear-free long-life use of the piston rod and the guide sleeve can be realized.
According to one embodiment of the invention, the guide sleeve is provided with at least one oil feeding channel extending along the axial direction of the guide sleeve, and the static pressure oil cavity is connected with the oil feeding channel.
According to one embodiment of the invention, the single-rod high-frequency impact test hydraulic cylinder further comprises: the throttling valve is arranged in the oil feeding channel, and at least one throttling valve is arranged in the oil feeding channel.
According to one embodiment of the invention, the four static pressure oil ports are uniformly arranged on the outer circumference of the guide sleeve in an annular mode.
According to one embodiment of the invention, the static pressure oil chambers are uniformly arranged in the guide sleeve in groups of four, and at least two groups of static pressure oil chambers are arranged.
According to one embodiment of the invention, the single-rod high-frequency impact test hydraulic cylinder further comprises: and the sealing ring is arranged between the cylinder barrel and the piston rod and sleeved on the outer circumference of the piston rod.
According to one embodiment of the invention, the guide sleeve further comprises: and the static pressure oil return port is arranged on one side of the outer circumference of the guide sleeve.
According to one embodiment of the invention, a plurality of oil return cavities are arranged inside the guide sleeve.
According to one embodiment of the invention, the single-rod high-frequency impact test hydraulic cylinder further comprises: the dustproof ring is arranged between the piston rod and the guide sleeve, and the dustproof ring is arranged on one side, back to the cylinder barrel, of the guide sleeve.
According to one embodiment of the invention, the throttle valve is a small orifice throttle plug or a capillary tube.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a cross-sectional view of a single-rod high-frequency impact test hydraulic cylinder according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a single-rod high-frequency impact test hydraulic cylinder according to an embodiment of the invention;
FIG. 3 is a cross-sectional view of a single-rod high-frequency impact test cylinder according to an embodiment of the invention.
Reference numerals:
a single-rod high-frequency impact test hydraulic cylinder 100;
a cylinder barrel 10; a large cavity oil port 11; a small cavity oil port 12;
a piston rod 20;
a guide sleeve 30; a static pressure oil port 31; a hydrostatic oil chamber 32; a static pressure oil return port 33; an oil return chamber 34;
a throttle valve 40;
a seal ring 50;
a dust ring 60.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The single-rod high-frequency impact test cylinder 100 according to the embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1 to 3, a single-rod high-frequency impact testing hydraulic cylinder 100 according to an embodiment of the present invention includes: the hydraulic cylinder comprises a cylinder barrel 10, a piston rod 20, a guide sleeve 30, at least one static pressure oil port 31 and at least one static pressure oil chamber 32.
Particularly, cylinder 10 is hollow columnar structure, one side is equipped with big chamber hydraulic fluid port 11 and loculus hydraulic fluid port 12 outside the cylinder 10 circumference, cylinder 10 one end is for opening the end other end and be the blind end, inside cylinder 10 was located to piston rod 20, the end of opening of cylinder 10 can be stretched out to piston rod 20 one end, uide bushing 30 is hollow annular structure, uide bushing 30 cover is located on the body of rod of piston rod 20 and is located the end one side of opening of cylinder 10, static pressure hydraulic fluid port 31 is located on the outer circumference of uide bushing 30, static pressure oil pocket 32 is located the uide bushing 30 inboardly.
In other words, the single-rod high-frequency impact test hydraulic cylinder 100 is mainly composed of a cylinder tube 10, a piston rod 20, a guide sleeve 30, a static pressure oil port 31 and a static pressure oil chamber 32. The cylinder 10 is a hollow cylinder structure with one closed end and one open end. The piston rod 20 is disposed inside the cylinder 10 and has one end extending out of the open end of the cylinder 10, and the piston rod 20 can reciprocate along the axial direction of the cylinder 10. It should be noted that the large chamber oil port 11 and the small chamber oil port 12 are respectively disposed at one side of the outer circumference of the cylinder 10, and the hydraulic oil pushes the piston rod 20 to move through the large chamber oil port 11 and the small chamber oil port 12. The rod piece of the piston rod 20 extending out of one end of the cylinder barrel 10 is sleeved with a guide sleeve 30, the outer circumference of the guide sleeve 30 is provided with a static pressure oil port 31, and the inner circumference of the guide sleeve is provided with a static pressure oil chamber.
Therefore, the cylinder barrel 10, the piston rod 20, the guide sleeve 30, the at least one static pressure oil port 31 and the at least one static pressure oil cavity 32 are combined, and the piston rod 20 is supported by opposite moments generated by distribution of hydraulic oil in the static pressure oil cavity 32, so that extremely low friction force generated when the single-rod high-frequency impact test hydraulic cylinder runs and long-life use of the piston rod and the guide sleeve without abrasion can be realized.
In some embodiments of the present invention, guide sleeve 30 is provided with at least one oil feed passage extending axially along guide sleeve 30, and hydrostatic oil chamber 32 is connected to the oil feed passage. By arranging the oil channel inside the guide sleeve 30, hydraulic oil can smoothly enter the static pressure oil cavity 32, so that the piston rod 20 is supported by using the static pressure principle to reduce the friction resistance.
According to one embodiment of the present invention, the single-rod high-frequency impact testing hydraulic cylinder 100 further comprises: the throttle valve 40 is arranged in the oil feeding channel, and at least one throttle valve 40 is arranged in one oil feeding channel. Hydrostatic support pressure is established by throttling the oil intake of hydrostatic oil chamber 32 by providing a throttle 40 inside the oil gallery.
In some embodiments of the present invention, the oil ports 31 are four and uniformly arranged around the outer circumference of the guide sleeve 30. That is, the static pressure oil ports 31 are arranged on the outer circumference of the guide sleeve 30 and are uniformly distributed at 90 degrees, and any one of the static pressure oil ports 31 can be selected to be filled with hydraulic oil according to actual conditions.
Furthermore, static pressure oil chambers 32 are uniformly arranged in the guide sleeve 30 in groups of four, and at least two groups of static pressure oil chambers 32 are arranged. By arranging the static pressure oil chambers 32 in the guide sleeve 30 and arranging every four static pressure oil chambers 32 as a group, the multi-group structure ensures that the piston rod 20 is stressed uniformly and is not easy to incline.
Optionally, the single-rod high-frequency impact testing hydraulic cylinder 100 further comprises: and the sealing ring 50 is arranged between the cylinder barrel 10 and the piston rod 20 and sleeved on the outer circumference of the piston rod 20. The sealing ring 50 can play a good sealing effect, and the hydraulic cylinder is prevented from being normally operated due to leakage of hydraulic oil.
In some embodiments of the present invention, the guide sleeve 30 further comprises: and the static pressure oil return port 33 is arranged on one side of the outer circumference of the guide sleeve 30. The static pressure oil return port 33 is arranged to facilitate the circulation of the hydraulic oil out of the guide sleeve 30, thereby ensuring the stability of the internal pressure.
According to one embodiment of the invention, a plurality of oil return chambers 34 are provided inside the guide sleeve 30. The return chamber 34 is connected to the tank from the hydrostatic return port 33, which ensures that the pressure of the oil acting on the sealing ring 50 is always kept at zero or a small return pressure. Therefore, high-pressure oil does not act on the sealing lip of the sealing ring 50, sealing is achieved between the sealing ring 50 and the piston rod 20 only by means of a little compression amount of the sealing ring 50, oil is prevented from leaking, and accordingly low-abrasion, long-service life and energy efficiency improvement between the sealing ring 50 and the piston rod 20 are achieved.
Optionally, the single-rod high-frequency impact testing hydraulic cylinder 100 further comprises: the dust ring 60, the dust ring 60 is arranged between the piston rod 20 and the guide sleeve 30, and the dust ring 60 is arranged on one side of the guide sleeve 30, which is back to the cylinder 10. By arranging the dust ring 60, the effect of preventing external dust and sundries from entering the oil cylinder can be achieved.
According to one embodiment of the invention, the throttle valve 40 is a small orifice choke or capillary tube. The flow rate of the hydraulic oil is throttled by using the small-hole throttling plug or the capillary tube, so that the effect of statically supporting the piston rod 20 is realized, and the small-hole throttling plug or the capillary tube is simple in structure and convenient to mount.
In summary, the single-rod high-frequency impact test hydraulic cylinder 100 according to the embodiment of the invention can use multiple sets of parallel static pressure oil chambers 32 to enable the piston rod 20 to float at the central position, and can bear the side load generated by impact. Compared with the common impact oil cylinder, the piston rod 20 does not use a pressure-bearing high-pressure sealing element for oil sealing, and only one dustproof ring 60 and one sealing ring 50 are used for preventing external dust from entering the oil cylinder and low-pressure oil from leaking out respectively. This makes single-rod high-frequency impact test hydraulic cylinder 100 avoid the increase of the local heating abrasion loss of the sealing member during high-frequency actuation to cause failure and produce larger friction resistance to influence actuation. The single-rod high-frequency impact test hydraulic cylinder 100 can realize the use of high frequency response, low friction and long service life, and is compact in structure, convenient to install and greatly reduced in cost by adopting a single-rod structure oil cylinder.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. The utility model provides a single pole high frequency impact test pneumatic cylinder which characterized in that includes:
the cylinder barrel is of a hollow columnar structure, a large cavity oil port and a small cavity oil port are formed in one side outside the circumference of the cylinder barrel, and one end of the cylinder barrel is an open end while the other end is a closed end;
the piston rod is arranged in the cylinder barrel, and one end of the piston rod can extend out of the open end of the cylinder barrel;
the guide sleeve is of a hollow annular structure, and is sleeved on the rod body of the piston rod and positioned on one side of the opened end of the cylinder barrel;
the static pressure oil port is arranged on the outer circumference of the guide sleeve;
and the static pressure oil chamber is arranged on the inner side of the guide sleeve.
2. The single-rod high-frequency impact test hydraulic cylinder according to claim 1, wherein the guide sleeve is provided with at least one oil feeding channel extending along the axial direction of the guide sleeve, and the static pressure oil chamber is connected with the oil feeding channel.
3. The single-rod high-frequency impact testing hydraulic cylinder according to claim 2, further comprising:
the throttling valve is arranged in the oil feeding channel, and at least one throttling valve is arranged in the oil feeding channel.
4. The single-rod high-frequency impact test hydraulic cylinder according to claim 1, wherein the four static pressure oil ports are uniformly arranged on the outer circumference of the guide sleeve in a ring shape.
5. The single-rod high-frequency impact testing hydraulic cylinder according to claim 1, wherein the hydrostatic oil chambers are arranged in groups of four and uniformly around the inside of the guide sleeve, and the hydrostatic oil chambers are at least two groups.
6. The single-rod high-frequency impact testing hydraulic cylinder according to claim 1, further comprising:
and the sealing ring is arranged between the cylinder barrel and the piston rod and sleeved on the outer circumference of the piston rod.
7. The single-rod high-frequency impact testing hydraulic cylinder according to claim 1, wherein the guide sleeve further comprises:
and the static pressure oil return port is arranged on one side of the outer circumference of the guide sleeve.
8. The single-rod high-frequency impact test hydraulic cylinder according to claim 1, wherein a plurality of oil return cavities are formed inside the guide sleeve.
9. The single-rod high-frequency impact testing hydraulic cylinder according to claim 1, further comprising:
the dustproof ring is arranged between the piston rod and the guide sleeve, and the dustproof ring is arranged on one side, back to the cylinder barrel, of the guide sleeve.
10. The single-rod high-frequency impact test hydraulic cylinder according to claim 3, wherein the throttle valve is a small-hole throttle plug or a capillary tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836841.1A CN111980986A (en) | 2020-08-19 | 2020-08-19 | Single-rod high-frequency impact test hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010836841.1A CN111980986A (en) | 2020-08-19 | 2020-08-19 | Single-rod high-frequency impact test hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111980986A true CN111980986A (en) | 2020-11-24 |
Family
ID=73434940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010836841.1A Pending CN111980986A (en) | 2020-08-19 | 2020-08-19 | Single-rod high-frequency impact test hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111980986A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185926A (en) * | 2008-02-07 | 2009-08-20 | Psc Kk | Static pressure gas bearing of piston driving mechanism and gas pressure actuator |
| CN103867526A (en) * | 2014-04-11 | 2014-06-18 | 武汉科技大学 | Low-friction hybrid support guide sleeve hydraulic cylinder |
| CN106089848A (en) * | 2016-08-19 | 2016-11-09 | 中国重型机械研究院股份公司 | The short-stroke high-frequency rate start hydraulic cylinder that a kind of band rinses |
| CN207377900U (en) * | 2017-10-25 | 2018-05-18 | 烟台比吉流体控制技术有限公司 | A kind of single-acting hydrostatic support actuator |
| CN207830270U (en) * | 2018-01-09 | 2018-09-07 | 武光玉 | Hydrostatic support type servo hydraulic cylinder |
| CN108895056A (en) * | 2018-07-28 | 2018-11-27 | 韶关液压件厂有限公司 | A kind of static pressure chamber bearing guiding device hydraulic cylinder |
| CN109764022A (en) * | 2019-03-06 | 2019-05-17 | 哈尔滨理工大学 | A kind of hydrostatic seal low friction hydraulic cylinder of ellipse oil pocket |
-
2020
- 2020-08-19 CN CN202010836841.1A patent/CN111980986A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009185926A (en) * | 2008-02-07 | 2009-08-20 | Psc Kk | Static pressure gas bearing of piston driving mechanism and gas pressure actuator |
| CN103867526A (en) * | 2014-04-11 | 2014-06-18 | 武汉科技大学 | Low-friction hybrid support guide sleeve hydraulic cylinder |
| CN106089848A (en) * | 2016-08-19 | 2016-11-09 | 中国重型机械研究院股份公司 | The short-stroke high-frequency rate start hydraulic cylinder that a kind of band rinses |
| CN207377900U (en) * | 2017-10-25 | 2018-05-18 | 烟台比吉流体控制技术有限公司 | A kind of single-acting hydrostatic support actuator |
| CN207830270U (en) * | 2018-01-09 | 2018-09-07 | 武光玉 | Hydrostatic support type servo hydraulic cylinder |
| CN108895056A (en) * | 2018-07-28 | 2018-11-27 | 韶关液压件厂有限公司 | A kind of static pressure chamber bearing guiding device hydraulic cylinder |
| CN109764022A (en) * | 2019-03-06 | 2019-05-17 | 哈尔滨理工大学 | A kind of hydrostatic seal low friction hydraulic cylinder of ellipse oil pocket |
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Application publication date: 20201124 |