CN116066445A - Balance type leakless low friction hydraulic cylinder - Google Patents
Balance type leakless low friction hydraulic cylinder Download PDFInfo
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- CN116066445A CN116066445A CN202211659575.5A CN202211659575A CN116066445A CN 116066445 A CN116066445 A CN 116066445A CN 202211659575 A CN202211659575 A CN 202211659575A CN 116066445 A CN116066445 A CN 116066445A
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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
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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
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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
- F15B15/1447—Pistons; Piston to piston rod assemblies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to the technical field of hydraulic cylinders, and discloses a balanced type leakage-free low-friction hydraulic cylinder which comprises a main oil pump, a servo valve, a rodless cavity oil port, a rod cavity oil port, a first oil port, an oil supply pipeline, a piston balancing groove arranged on a piston, a second oil port, a guide sleeve balancing groove arranged on a guide sleeve, an auxiliary oil pump, a first pressure reducing valve, a second pressure reducing valve and a one-way valve. The balance groove is formed in the piston and the guide sleeve, high-pressure oil is introduced, so that the pressure of the rod cavity or the rodless cavity is equal to the pressure of the rod cavity or the rodless cavity, oil in the rod cavity and the rodless cavity cannot leak at the moment, the pressure of the system is stable, the control precision is high, a high-pressure sealing piece between the piston and the cylinder barrel is canceled, friction of the whole hydraulic cylinder system is reduced, mechanical loss is reduced, the efficiency and the movement performance of the system are improved, and the hydraulic cylinder system is particularly suitable for working conditions of high pressure, low speed and extremely high control precision.
Description
Technical Field
The invention relates to the technical field of hydraulic cylinders, in particular to a balanced type leakage-free low-friction hydraulic cylinder.
Background
Hydraulic cylinders are one of the most common components in the hydraulic industry. The hydraulic cylinder converts hydraulic energy into mechanical energy, and has wide application under the condition of linear reciprocating motion or swinging motion, simple structure and reliable work.
The typical hydraulic cylinder basically comprises a cylinder bottom, a cylinder barrel, an end cover, a piston rod, a sealing device and a guiding device, can be divided into a single-acting type and a double-acting type according to the action condition of hydraulic pressure, can be divided into a piston type, a plunger type, a multi-stage telescopic sleeve type, a rack-and-pinion type and the like according to the structural form, can achieve extremely high pressure, and brings great challenges to control precision when the hydraulic cylinder needs fine adjustment.
Most of the current hydraulic cylinders are sealed by sealing rings, so that friction always exists in the hydraulic cylinder system, the efficiency and the motion performance of the system are reduced, and the control performance is influenced. In addition, internal leakage and external leakage of the hydraulic cylinder are difficult to avoid on the existing hydraulic cylinder, the leakage can lead to unstable system pressure, unstable speed of an actuating mechanism, and incapacity of meeting control requirements, and the stability and reliability of equipment are directly affected, especially under the conditions of high pressure, low speed and extremely high control precision requirements, the leakage can directly lead to failure of the system to meet the control precision requirements and even damage, and the leakage can also lead to pollution and waste of oil.
Disclosure of Invention
The invention aims to provide a balanced type leakage-free low-friction hydraulic cylinder, which can solve one of the problems of high friction loss performance or oil leakage of sealing elements in the prior art.
In order to achieve the above purpose, the invention provides a balanced type leakless low friction hydraulic cylinder, which comprises a main oil pump, a servo valve, a rodless cavity oil port, a rod cavity oil port, a first oil port, an oil supply pipeline, a piston balancing groove arranged on a piston, a second oil port, a guide sleeve balancing groove arranged on a guide sleeve, an auxiliary oil pump, a first pressure reducing valve, a second pressure reducing valve and a one-way valve, wherein the main oil pump is connected with the servo valve;
the main oil pump is respectively communicated with the rodless cavity oil port and the rod cavity oil port through servo valves; the first oil port is communicated with the piston balancing groove through an oil supply pipeline, and the second oil port is communicated with the guide sleeve balancing groove; the auxiliary oil pump is communicated with the first oil port through a first pressure reducing valve; the auxiliary oil pump is simultaneously communicated with the first oil port and the second oil port through the second pressure reducing valve; a one-way valve which only allows oil to flow from the second pressure reducing valve to the first pressure reducing valve is arranged between the first pressure reducing valve and the second pressure reducing valve; when the servo valve controls oil to flow to the oil port of the rodless cavity, the first pressure reducing valve is opened; when the servo valve controls oil to flow to the oil port of the rod cavity, the second pressure reducing valve is opened.
Further, the balanced type leakage-free low-friction hydraulic cylinder further comprises a sealing ring, and the sealing ring is arranged between the cylinder barrel and the guide sleeve.
Further, the guide sleeve is further provided with a pressure relief groove, the pressure relief groove is communicated with the guide sleeve balancing groove, and the pressure relief groove is communicated with the oil tank through a third oil port.
Further, the balanced type leakage-free low-friction hydraulic cylinder further comprises a low-pressure sealing ring, a dust ring and a long guide ring, wherein the low-pressure sealing ring and the dust ring are arranged between the piston rod and the end cover, and the long guide ring is arranged between the piston rod and the guide sleeve.
Further, the balanced type leakage-free low-friction hydraulic cylinder further comprises a pressure regulating valve, wherein an outlet of the pressure regulating valve is connected with an oil tank, and an inlet of the pressure regulating valve is connected with an outlet of the main oil pump.
Further, the balanced type leakage-free low-friction hydraulic cylinder further comprises a safety valve, wherein an inlet of the safety valve is connected with an auxiliary oil pump, and an outlet of the safety valve is connected with an oil tank.
Further, at least two short guide rings are arranged on the piston, and the piston balancing groove is arranged between the two short guide rings.
Further, the inlet of the main oil pump and the inlet of the auxiliary oil pump are connected with the oil tank.
Further, the servo valve comprises oil ports Y1, Y2 and A, B, wherein the oil port Y1 is connected with a rodless cavity oil port, the oil port Y2 is connected with a rod cavity oil port, the oil port A is connected with a main oil pump outlet, and the oil port B is connected with an oil tank.
Further, the rod cavity oil port is arranged on the cylinder barrel and is communicated with the rod cavity, and the rodless cavity oil port is communicated with the rodless cavity.
The beneficial effects of the invention are as follows:
according to the invention, the balance groove is formed in the piston and the guide sleeve, and high-pressure oil is introduced, so that the pressure of the rod cavity or the rodless cavity is equal to the pressure of the rod cavity or the rodless cavity, and oil in the rod cavity and the rodless cavity cannot leak at the moment, so that no leakage is realized, the pressure of the system is stable, the control precision is high, and the requirement of extremely high precision is met.
And secondly, the invention eliminates a high-pressure sealing element between the piston and the cylinder barrel, so that the friction of the whole hydraulic cylinder system is reduced, the mechanical loss is reduced, and the efficiency and the movement performance of the system are improved.
And thirdly, the invention is connected with the oil tank through the pressure relief groove, and oil in the pressure relief groove is low-pressure oil, so that the low-pressure sealing ring is used for sealing, and the friction of the system is effectively reduced.
The invention realizes no leakage and low friction resistance through the structures, which is especially suitable for the working conditions of high pressure, low speed and extremely high control precision.
Drawings
FIG. 1 is a schematic view of a construction of the present invention;
FIG. 2 is a schematic illustration of the structure of the piston assembly of the present invention;
fig. 3 is a schematic view of the structure of the guide sleeve assembly of the present invention.
The reference numerals of the hydraulic cylinder are a cylinder bottom 1, a rodless cavity oil port 2, a cylinder barrel 3, a piston 4, a short guide ring 5, a piston balance groove 6, a piston rod 7, a first oil port 8, a rod cavity oil port 9, a guide sleeve 10, a second oil port 11, a third oil port 12, a guide sleeve balance groove 13, a pressure relief groove 14, a sealing ring 15, a long guide ring 16, a low-pressure sealing ring 17, a dust ring 18, a flange 19, an end cover 20, a bolt 21, a main oil pump 22, a servo valve 23, a pressure regulating valve 24, an auxiliary oil pump 25, a safety valve 26, a first pressure reducing valve 27, a second pressure reducing valve 28, a one-way valve 29, an oil tank 30 and an oil supply pipeline 31.
Detailed Description
The following describes specific embodiments of the present invention in detail. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "upper and lower" are used to generally refer to orientations in the assembled state of use. "inner and outer" means inner and outer relative to the contour of the respective parts themselves.
In order to solve one of the problems of large friction loss performance or oil leakage of sealing elements in the prior art, as shown in fig. 1-3, the invention provides a balanced type leakage-free low-friction hydraulic cylinder, which comprises a main oil pump 22, a servo valve 23, a rodless cavity oil port 2, a rod cavity oil port 9, a first oil port 8, an oil supply pipeline 31, a piston balance groove 6 arranged on a piston 4, a second oil port 11, a guide sleeve balance groove 13 arranged on a guide sleeve 10, an auxiliary oil pump 25, a first pressure reducing valve 27, a second pressure reducing valve 28 and a one-way valve 29;
the main oil pump 22 is respectively communicated with the rodless cavity oil port 2 and the rod cavity oil port 9 through a servo valve 23; the first oil port 8 is communicated with the piston balance groove 6 through an oil supply pipeline 31, and the second oil port 11 is communicated with the guide sleeve balance groove 13; the auxiliary oil pump 25 is communicated with the first oil port 8 through a first pressure reducing valve 27; the auxiliary oil pump 25 is simultaneously communicated with the first oil port 8 and the second oil port 11 through a second pressure reducing valve 28; a check valve 29 which only allows oil to flow from the second pressure reducing valve 28 to the first pressure reducing valve 27 is arranged between the first pressure reducing valve 27 and the second pressure reducing valve 28; when the servo valve 23 controls oil to flow to the rodless cavity oil port 2, the first pressure reducing valve 27 is opened; when the servo valve 23 controls the oil flow to the rod chamber port 9, the second relief valve 28 is opened.
The balance groove is formed in the piston and the guide sleeve, high-pressure oil is introduced, so that the pressure of the rod cavity or the rodless cavity is equal to the pressure of the rod cavity or the rodless cavity, oil in the rod cavity and the rodless cavity cannot leak at the moment, the pressure of the system is stable, the control precision is high, a high-pressure sealing piece between the piston and the cylinder barrel is canceled, friction of the whole hydraulic cylinder system is reduced, mechanical loss is reduced, the efficiency and the movement performance of the system are improved, and the hydraulic cylinder system is particularly suitable for working conditions of high pressure, low speed and extremely high control precision.
The above configuration is based on the following basic configuration of the hydraulic cylinder: in the preferred case, the cylinder bottom 1 is fixedly connected with the cylinder 3 coaxially, the cylinder 3 is of a hollow structure with two ends penetrating, and more preferably, the cylinder bottom and the cylinder 3 can be welded or integrally formed. The piston rod 7 is fixedly connected with the piston 4 in the same axis, and more preferably, the piston rod 7 and the piston 4 can be welded or integrally formed. The piston 4 and the piston rod 7 are arranged in the inner cavity of the cylinder barrel 3 to slide freely. The cavity in the cylinder 3 is divided into a rod-like cavity with a piston rod 7 and a rodless cavity without a piston rod 7, delimited by the piston 4. An end cover 20 is arranged at one end, far away from the cylinder bottom 1, of the cylinder barrel 3, and the flange 19 is fixedly connected with the end cover through bolts 21. The guide sleeve 10 is sleeved on the piston rod 7, and the right end face of the guide sleeve is tightly contacted with the end cover.
Wherein, rodless cavity oil port 2, first hydraulic fluid port 8 set up on cylinder bottom 1. The second oil port 11 is disposed in the cylinder 3.
In order to improve the tightness between the cylinder barrel 3 and the guide sleeve 10 and prevent oil leakage, the balanced type non-leakage low-friction hydraulic cylinder further comprises a sealing ring 15, and the sealing ring 15 is arranged between the cylinder barrel 3 and the guide sleeve 10.
In order to guide out the excessive and possibly leaked oil in the guide sleeve balancing groove 13 to prevent oil leakage, the guide sleeve 10 is further provided with a pressure relief groove 14, the pressure relief groove 14 is communicated with the guide sleeve balancing groove 13, and the pressure relief groove 14 is communicated with the oil tank 30 through a third oil port 12. The third oil port 12 is disposed on the cylinder 3.
Preferably, the pressure relief groove 14 and the guide sleeve balancing groove 13 are arranged along the radial direction of the guide sleeve 10, and are communicated through a gap between the guide sleeve 10 and the piston rod 7.
In order to prevent oil leakage from the pressure release groove 14 on the piston rod 7 and dust from adhering to the circumference of the piston rod 17, the balanced type leakless low friction hydraulic cylinder further comprises a low pressure sealing ring 17, a dust ring 18 and a long guide ring 16, wherein the low pressure sealing ring 17 and the dust ring 18 are arranged between the piston rod 7 and the end cover 20, and the long guide ring 16 is arranged between the piston rod 7 and the guide sleeve 10. Although the low-pressure seal ring 17 is provided, since the pressure is low, even with the low-pressure seal ring 17, the friction is small, and a leak-free low friction is realized. The dust ring 18 blocks external dust from entering the oil in both interiors.
Further, the balanced type leakless low friction hydraulic cylinder further comprises a pressure regulating valve 24, wherein an outlet of the pressure regulating valve 24 is connected with an oil tank 30, and an inlet of the pressure regulating valve is connected with an outlet of the main oil pump 22. The pressure regulating valve 24 is used to set the outlet pressure of the main oil pump 22 so that the outlet pressure is constant at a specific value.
Further, the balanced type leakless low friction hydraulic cylinder also comprises a safety valve 26, wherein an inlet of the safety valve 26 is connected with an auxiliary oil pump 25, and an outlet of the safety valve is connected with an oil tank 30. The relief valve 26 is used for discharging oil, and prevents the oil pressure between the auxiliary oil pump 25 and the relief valve from being too high.
Since the piston balancing groove 6 plays a role in balancing the cylinder during both extension and retraction, at least two short guide rings 5 are provided on the piston 4, and the piston balancing groove 6 is provided between the two short guide rings 5 in order to make the forces that the piston balancing groove 6 plays in both formations approximately the same. Preferably, the number of the short guide rings 5 is two, and the piston balance groove 6 is arranged at the middle position. Preferably, the balancing groove 6 is an annular groove circumferentially arranged on the piston 4.
In order to supply oil to the main oil pump 22 and the auxiliary oil pump 25, the inlet of the main oil pump 22 and the inlet of the auxiliary oil pump 25 are connected with the oil tank 30.
In order to output the modulated oil flow and pressure and input oil to the two cavities respectively, the servo valve 23 comprises oil ports Y1, Y2 and A, B, wherein the oil port Y1 is connected with a rodless cavity oil port 2, the oil port Y2 is connected with a rod cavity oil port 9, the oil port A is connected with an outlet of the main oil pump 22, and the oil port B is connected with the oil tank 30.
The rod cavity oil port 9 is arranged on the cylinder barrel 3 and is communicated with the rod cavity, and the rodless cavity oil port 2 is communicated with the rodless cavity.
The specific working flow of the invention is as follows:
when the electromagnet YA of the servo valve 23 is not electrified, the main oil pump 22 absorbs oil from the oil tank 30 and supplies oil to the rodless cavity of the hydraulic cylinder, the pressure regulating valve 24 is used for regulating the outlet pressure of the main oil pump 22, the outlet pressure is P, the auxiliary oil pump 25 is used for regulating the outlet pressure to be P1 through the first pressure reducing valve 27, when P=P1, the pressure of the oil in the rodless cavity is balanced with the pressure of the piston balance groove 6, the oil in the rodless cavity is not leaked, the oil in the piston balance groove 6 can be leaked to the rod cavity, and although the oil in the piston balance groove 6 can be leaked, the pressure of the rodless cavity is not influenced, so that the pressure of the system is stable; when the electromagnet YA of the servo valve 23 is powered on, the main oil pump 22 supplies oil to the rod cavity of the hydraulic cylinder, the outlet pressure is P, at this time, the outlet of the auxiliary oil pump 25 passes through the second relief valve 28, the pressure is set to be P2 by the second relief valve 28, the oil enters the first oil port 8 through the one-way valve 29 and enters the piston balance groove 6 along the oil supply pipeline 31, in addition, the oil also flows to the second oil port 11 through the second relief valve 28 and enters the guide sleeve balance groove 13, when p=p2, the oil pressure in the rod cavity is balanced with the oil pressure in the piston balance groove 6 and the guide sleeve balance groove 13, no leakage exists in the rod cavity, the oil in the guide sleeve balance groove 13 can leak to the relief groove 14, then a part of the oil flows back to the oil tank 30, the low-pressure seal ring 17 prevents another part of the oil from leaking, because the pressure is very low, even if the friction resistance of the seal ring is very low, the leakage-free low friction resistance is realized, the system pressure is stable, the control precision is high, and the system is suitable for extremely high precision requirements. And the high-pressure sealing element between the piston 4 and the cylinder barrel 3 is eliminated, so that the friction of the whole hydraulic cylinder system is reduced, the mechanical loss is reduced, and the efficiency and the movement performance of the system are improved. The invention is especially suitable for the working conditions of high pressure, low speed and extremely high control precision.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (10)
1. The balance type leakless low friction hydraulic cylinder is characterized by comprising a main oil pump (22), a servo valve (23), a rodless cavity oil port (2), a rod cavity oil port (9), a first oil port (8), an oil supply pipeline (31), a piston balance groove (6) arranged on a piston (4), a second oil port (11), a guide sleeve balance groove (13) arranged on a guide sleeve (10), an auxiliary oil pump (25), a first pressure reducing valve (27), a second pressure reducing valve (28) and a one-way valve (29);
the main oil pump (22) is respectively communicated with the rodless cavity oil port (2) and the rod cavity oil port (9) through a servo valve (23); the first oil port (8) is communicated with the piston balancing groove (6) through an oil supply pipeline (31), and the second oil port (11) is communicated with the guide sleeve balancing groove (13); the auxiliary oil pump (25) is communicated with the first oil port (8) through a first pressure reducing valve (27); the auxiliary oil pump (25) is simultaneously communicated with the first oil port (8) and the second oil port (11) through a second pressure reducing valve (28); a one-way valve (29) which only allows oil to flow from the second pressure reducing valve (28) to the first pressure reducing valve (27) is arranged between the first pressure reducing valve (27) and the second pressure reducing valve (28); when the servo valve (23) controls oil to flow to the rodless cavity oil port (2), the first pressure reducing valve (27) is opened; when the servo valve (23) controls oil to flow to the oil port (9) with the rod cavity, the second pressure reducing valve (28) is opened.
2. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that it further comprises a sealing ring (15), said sealing ring (15) being arranged between the cylinder barrel (3) and the guide sleeve (10).
3. The balanced type leakage-free low-friction hydraulic cylinder according to claim 1, wherein the guide sleeve (10) is further provided with a pressure relief groove (14), the pressure relief groove (14) is communicated with the guide sleeve balance groove (13), and the pressure relief groove (14) is communicated with the oil tank (30) through a third oil port (12).
4. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that it further comprises a low pressure sealing ring (17), a dust ring (18) and a long guide ring (16), said low pressure sealing ring (17) and dust ring (18) being arranged between the piston rod (7) and the end cap (20), said long guide ring (16) being mounted between the piston rod (7) and the guide sleeve (10).
5. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that it further comprises a pressure regulating valve (24), the outlet of the pressure regulating valve (24) being connected to a tank (30), the inlet of which is connected to the outlet of the main oil pump (22).
6. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that it further comprises a safety valve (26), the inlet of the safety valve (26) being connected to an auxiliary oil pump (25) and the outlet thereof being connected to an oil tank (30).
7. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that at least two short guide rings (5) are provided on the piston (4), the piston balancing groove (6) being arranged between the two short guide rings (5).
8. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that the inlet of the main oil pump (22) and the inlet of the auxiliary oil pump (25) are connected to the oil tank (30).
9. A balanced, leak-free, low friction hydraulic cylinder according to claim 1, characterized in that the servo valve (23) comprises ports Y1, Y2, A, B, the port Y1 being connected to a rodless chamber port (2), the port Y2 being connected to a rod chamber port (9), the port a being connected to the outlet of the main oil pump (22), the port B being connected to the oil tank (30).
10. The balanced type leakage-free low friction hydraulic cylinder according to claim 1, wherein the rod cavity oil port (9) is arranged on the cylinder barrel (3) and is communicated with the rod cavity, and the rodless cavity oil port (2) is communicated with the rodless cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211659575.5A CN116066445A (en) | 2022-12-22 | 2022-12-22 | Balance type leakless low friction hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211659575.5A CN116066445A (en) | 2022-12-22 | 2022-12-22 | Balance type leakless low friction hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN116066445A true CN116066445A (en) | 2023-05-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211659575.5A Pending CN116066445A (en) | 2022-12-22 | 2022-12-22 | Balance type leakless low friction hydraulic cylinder |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117759602A (en) * | 2023-12-26 | 2024-03-26 | 营口润发液压机械制造有限公司 | High-precision hydraulic cylinder |
-
2022
- 2022-12-22 CN CN202211659575.5A patent/CN116066445A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117759602A (en) * | 2023-12-26 | 2024-03-26 | 营口润发液压机械制造有限公司 | High-precision hydraulic cylinder |
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