CN116557364A - Novel hydraulic assembly for electrohydraulic switch machine - Google Patents
Novel hydraulic assembly for electrohydraulic switch machine Download PDFInfo
- Publication number
- CN116557364A CN116557364A CN202211686545.3A CN202211686545A CN116557364A CN 116557364 A CN116557364 A CN 116557364A CN 202211686545 A CN202211686545 A CN 202211686545A CN 116557364 A CN116557364 A CN 116557364A
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- Prior art keywords
- cylinder
- locking
- oil
- hydraulic
- oil cylinder
- 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
- 239000003921 oil Substances 0.000 claims abstract description 92
- 230000009471 action Effects 0.000 claims abstract description 27
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 8
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000009530 blood pressure measurement Methods 0.000 claims abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 238000005121 nitriding Methods 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
- B61L5/00—Local operating mechanisms for points or track-mounted scotch-blocks; Visible or audible signals; Local operating mechanisms for visible or audible signals
- B61L5/04—Fluid-pressure devices for operating points or scotch-blocks
-
- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- 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
- F15B15/1457—Piston rods
-
- 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
- F15B15/1457—Piston rods
- F15B15/1461—Piston rod sealings
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
Abstract
The invention relates to the field of hydraulic pressure, in particular to a novel hydraulic assembly for electrohydraulic switching, which comprises a hydraulic power unit A and a conversion locking oil cylinder unit B, wherein the hydraulic power unit A comprises a hydraulic oil tank, a motor, an oil suction one-way valve, an oil suction filter, a bidirectional external gear pump, an integrated plug-in overflow valve and a pressure measurement quick connector; the hydraulic assembly of the electrohydraulic switch machine adopts a structure that an action rod oil cylinder is connected with a locking oil cylinder in parallel, and a piston rod of the locking oil cylinder is connected with one of the left and right flanges respectively and turns over 180 degrees during symmetrical design and assembly; the connecting flanges of the locking cylinder piston rods at the two ends are sealed with the locking cylinder piston rods by adopting U-shaped sealing rings; the piston rod and the locking cylinder body are sealed through the locking cylinder floating sleeve, and the hydraulic assembly with the same stroke is smaller than the existing size in the market by adopting a parallel structure of the action rod cylinder and the locking cylinder, and has a compact structure and a reduced volume.
Description
Technical Field
The invention relates to the field of hydraulic pressure, in particular to a novel hydraulic assembly for electrohydraulic switching.
Background
At present, a hydraulic assembly for an electro-hydraulic switch machine of a domestic railway mainly uses a single oil cylinder, a locking rod and an action rod are driven by the single oil cylinder, and the oil cylinder and a power unit are connected with a joint through an external metal oil pipe and a bent pipe and a welding process; the hydraulic assembly for the switch machine has the advantages of large size of parts, large maintenance workload, easiness in oil leakage, high technical requirements on production workers, low assembly efficiency, complex maintenance, rapid development of track construction along with economic development, great improvement of national standard specification requirements, and obvious inconvenience and lag in structure, method, mechanical manufacturing process and use of the existing hydraulic assembly for the switch machine, and needs to be improved; if a hydraulic assembly for an electrohydraulic switch machine with small size, compact structure, simple installation and maintenance, stable operation and low maintenance cost can be developed, the current industry needs urgently.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide a novel hydraulic assembly for electrohydraulic switching, which adopts a parallel structure of an action rod oil cylinder and a locking oil cylinder, and has smaller size, compact structure and reduced volume compared with the prior art in the market.
The novel hydraulic assembly for electrohydraulic switching comprises a hydraulic power unit A and a switching locking oil cylinder unit B, wherein the hydraulic power unit A comprises a hydraulic oil tank, a motor, an oil suction one-way valve, an oil suction filter, a bidirectional external gear pump, an integrated plug-in overflow valve and a pressure measurement quick connector, and the switching locking oil cylinder unit B comprises an action rod oil cylinder and a locking oil cylinder; the hydraulic assembly of the electrohydraulic switch machine adopts a structure that an action rod oil cylinder is connected with a locking oil cylinder in parallel, and a piston rod of the locking oil cylinder is connected with one of the left and right flanges respectively and turns over 180 degrees during symmetrical design and assembly; the connecting flanges of the locking cylinder piston rods at the two ends are sealed with the locking cylinder piston rods by adopting U-shaped sealing rings; the piston rod and the locking cylinder body are sealed through a locking cylinder floating sleeve, and the left flange and the right flange of the cylinder body are respectively turned over for 180 degrees during symmetrical design and assembly; the flanges of the cylinder main bodies at the two ends are sealed with the piston rods of the cylinder of the action bars by adopting U-shaped sealing rings; the piston rod is sealed with the cylinder body of the action rod cylinder through the cylinder floating sleeve.
The piston rod of the locking oil cylinder is integrally processed with the piston rod by a piston ring.
The piston rod of the action rod oil cylinder is integrally processed with the piston rod by adopting a piston ring.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and detailed description.
FIG. 1 is a hydraulic schematic diagram of a novel electrohydraulic switch machine hydraulic assembly;
fig. 2 is a schematic structural view of the hydraulic unit and the cylinder unit;
FIG. 3 is a partial isometric and front view of a hydraulic unit;
FIG. 4 is a front view of a portion of a hydraulic unit;
FIG. 5 is a schematic diagram of the structure of the cylinder body of the actuating lever cylinder;
fig. 6 is a structural cross-sectional view of the sealing principle of the oil guide pin.
Detailed Description
The present invention will be described in detail with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1, a hydraulic schematic diagram of a novel hydraulic assembly of an electrohydraulic switch machine is provided, and the hydraulic schematic diagram comprises a hydraulic power unit A and a conversion locking oil cylinder unit B.
The hydraulic power unit A comprises a hydraulic oil tank 01, a motor 02, an oil suction one-way valve 03, an oil suction filter 04, a bidirectional external gear pump 05, an integrated plug-in overflow valve 06 and a pressure measuring quick connector 07.
The switch lock cylinder unit B includes an operation rod cylinder 08 and a lock cylinder 09.
The motor 02 rotates to drive the external engaged bidirectional gear pump 05 to rotate through the motor and pump connecting shaft 10, the gear pump has the advantage of high pollution resistance, the motor 1 is driven out of the shaft after being provided with the motor, and when a power supply of equipment fails, the hydraulic pump can be driven in a hand-operated mode; describing when the motor rotates left to drive the external engaged bidirectional gear pump 05 clockwise, the pump 05 sucks hydraulic oil from the oil tank 01 through the right side 03b oil suction one-way valve and passes through the oil suction filter 04; the pressure oil is discharged from the left side through 05 left-hand rotation, and the 03a one-way valve is in a closed state due to hydraulic power; the pressure oil flows into the left cavity of the oil cylinder 08, and flows into the left cavity of the oil cylinder 09 through the left cavity of the oil cylinder 08, so that the 09 locking oil cylinder moves towards the oil to release a mechanical locking mechanism on the switch machine, the 09 oil cylinder moves rightwards along with the 08 action rod oil cylinder after the locking is released until the right terminal position is stopped, and meanwhile, the locking oil cylinder 09 locks the current position of the action rod oil cylinder 08 through the mechanical locking mechanism of the switch machine; at this time, the left overflow valve 06a will drain the excessive hydraulic oil sucked instantly back into the oil tank 01; the motor stops rotating, and simultaneously the pressure of the system can be slowly reduced to zero through the pressure relief hole in the pump 05, so that the moment of the next starting of the motor is reduced, and the starting current and the impact on the motor are reduced.
The overflow valve 06 is used for protecting the motor, and when the oil cylinder is in place, the overflow valve works to maintain the motor to work under the set output force, so that the motor is prevented from being blocked; meanwhile, the output force of the oil cylinders 08 and 09 is limited, and the protection of mechanical parts on the point machine equipment is achieved.
The oil suction filter 04 is used for filtering impurities flowing back to the oil tank from the overflow valve due to running-in operation of the system and protecting sealing elements on the pistons in the gear pump and the oil cylinder.
And the pressure measuring quick connector 07 is used for connecting a quick-release pressure gauge during debugging or maintenance and reading the output pressure value of the hydraulic unit.
The pump is a series part, and the discharge capacity of the pump is selected according to the rated power of the switch machine electrohydraulic: 0.5ml/r,0.75ml/r,1.0ml/r,1.25ml/r,1.5ml/r,2.0ml/r,2.5ml/r, are used in the hydraulic unit, and the larger the output force pump displacement is, the faster the cylinder speed is, and the larger the power required to be output by the motor is.
As shown in fig. 2, a novel hydraulic assembly of an electrohydraulic switch machine comprises a hydraulic unit and an oil cylinder unit. The two are assembled together through the main mounting flange plate 12 to form a hydraulic assembly, and the whole axial direction depends on the whole reinforcing flange plate 16 to ensure that the whole structure is more reliable; because the hydraulic oil ways are all deep holes drilled on the flanges, no external oil pipe is needed, and the oil guide between the flanges is conducted, and the radial sealing is provided by the oil guide pins 18, so that the sealing is more reliable; the cylinder part principle is shown in the part of figure 4.
As shown in fig. 3 and 4, the hydraulic unit is partially isometric and front; as shown in the figure, when the switch machine with different output force and speed requirements is required to be adapted, the external engaged bidirectional gear pump 05 is only required to be adjusted according to the requirements; the oil tank is made of extruded aluminum alloy section, and has the advantages of light weight, attractive appearance, reliable sealing performance and excellent heat dissipation.
As shown in fig. 5, the hydraulic assembly of the electrohydraulic switch machine adopts a structure that an actuating lever oil cylinder is connected with a locking oil cylinder in parallel; taking the right movement of the action bar cylinder as an example, the oil in the oil way of the hydraulic unit flows into the main flange 801 of the action bar cylinder through the oil way in the main mounting flange plate 12, and then enters the cylinder 807 of the action bar cylinder through the flow passage of the center hole of the piston rod 803 of the action bar cylinder; enters the locking cylinder piston rod connecting flange 910 through the oil guide pin 18, and is guided to the locking cylinder body 907 through the locking cylinder piston rod 901; at this time, the oil cylinder starts to move rightwards to drive the locking flange connecting plate 15 to unlock the mechanical locking mechanism; when the locking cylinder 09 moves to the right mechanical end position, the actuating rod cylinder 08 starts to move from left to right, and drives the locking cylinder 09 to move to the right along with the actuating rod cylinder 09 to the mechanical end position.
The left and right of the locking cylinder piston rod connecting flange 910 are the same part, and the locking cylinder piston rod connecting flange is turned 180 degrees during symmetrical design and assembly, otherwise, the cylinder moves to the left, and oil is fed through the right connecting flange; the locking cylinder piston rod 901 is integrally processed by a piston ring and a piston rod; the locking cylinder piston rod connecting flange 910 at two ends is sealed with the locking cylinder piston rod 901 by adopting a U-shaped sealing ring 901; the piston rod 901 and the locking cylinder body 907 are sealed through the locking cylinder floating sleeve 908; the sealing principle is consistent with that of the following action rod oil cylinder 8; the cylinder lock flange 910 is used to lock the floating collar 908.
The left and right flanges 801 of the cylinder body are the same part, and are turned 180 degrees during symmetrical design and assembly, otherwise, the cylinder moves to the left, and oil is fed by the main flange of the right cylinder. The piston rod 803 of the action rod oil cylinder adopts the integral processing of the piston ring and the piston rod, and the surface salt bath nitriding treatment process improves the corrosion resistance and the wear resistance; the flanges 801 of the cylinder main bodies at the two ends are sealed with the piston rods 803 of the cylinder of the action bars by adopting U-shaped sealing rings 802; the piston rod 803 and the actuating rod cylinder block 807 are sealed by a cylinder float sleeve 89; the sealing principle is that the oil cylinder floating sleeve 809 and the action bar oil cylinder body 807 are sealed by an O-shaped combined seal 805; the action rod cylinder piston rod 803 and the cylinder floating sleeve 809 are sealed by a piston rod U-shaped sealing ring 802, and a piston rod guide ring 806 provides sliding support; the cylinder locking flange 810 is used to lock the cylinder floating sleeve 809; because the action rod oil cylinder moves bidirectionally and seals bidirectionally, the floating seal sleeve structure can reduce the precision of the fitting tolerance of parts, the friction resistance of the sliding seal of the oil cylinder and the piston rod, the service life of the sealing element is prolonged, and the like.
When the switch machine action bars are subjected to the bifurcation squeezing force, the copper-based graphite guide plates 1301 and 1302 are used for providing rigid support in order to better protect the action bar oil cylinder 08 and the locking oil cylinder 09; and simultaneously, the rotation of the oil cylinder can be prevented.
In order to reduce the increase of friction force between the oil cylinder and the piston rod caused by dead weight, the polytetrafluoroethylene guide plate 14 and the copper-based graphite guide plate 1303 transmit the dead weight of the oil cylinder to the casing of the switch machine; meanwhile, the sliding of the oil cylinder is not influenced;
as shown in fig. 6, a cross-sectional view of the sealing principle of the oil guide pin 18 is shown.
The O-ring 1801 provides radial sealing, the ring-shaped non-notch retainer ring 1802 improves the working pressure of the sealing element, and increases the allowable sealing gap of the sealing element; the oil guide pin body 1804 adopts a hard turning process, so that the surface smoothness is high, and the material hardness is high; the end face between the main oil circuit block of the hydraulic unit and the main mounting flange plate is sealed by an O-shaped ring 183; this structure ensures that both parts have two seals ensuring the reliability of the seal, while the pin can also provide a rigid connection for both parts.
Claims (10)
1. A novel hydraulic assembly for electrohydraulic switching, characterized by: the hydraulic power unit (A) comprises a hydraulic oil tank (01), a motor (02), an oil suction one-way valve (03), an oil suction filter (04), a bidirectional external gear pump (05), an integrated plug-in overflow valve (06) and a pressure measurement quick connector (07), and the conversion locking oil cylinder unit (B) comprises an action rod oil cylinder (08) and a locking oil cylinder (09); the hydraulic assembly of the electrohydraulic switch machine adopts a structure that an action rod oil cylinder is connected with a locking oil cylinder in parallel, and a left connecting flange (9-10) and a right connecting flange (10) of a piston rod of the locking oil cylinder are respectively turned over for 180 degrees during symmetrical design and assembly; the connecting flanges (9-10) of the piston rods of the locking cylinders at the two ends are sealed with the piston rods (9-01) of the locking cylinders by adopting U-shaped sealing rings (9-01); the piston rod (9-01) and the locking cylinder body (9-07) are sealed through the locking cylinder floating sleeve (9-08), and the left and right flanges (8-01) of the cylinder main body are respectively turned over for 180 degrees during symmetrical design and assembly; the flanges (8-01) of the cylinder main bodies at the two ends are sealed with the piston rod (8-03) of the cylinder of the action rod by adopting a U-shaped sealing ring (8-02); the piston rod (8-03) is sealed with the cylinder body (8-07) of the action rod cylinder through a cylinder floating sleeve (8-9).
2. The novel hydraulic assembly for electrohydraulic switching of claim 1 wherein: the locking cylinder piston rod (9-01) is integrally machined with the piston rod by adopting a piston ring.
3. The novel hydraulic assembly for electrohydraulic switching of claim 2 wherein: the piston rod (8-03) of the actuating rod oil cylinder is integrally processed with the piston rod by adopting a piston ring.
4. A novel hydraulic assembly for electrohydraulic switching as recited in claim 3 wherein: the piston rod (8-03) of the actuating rod oil cylinder adopts a surface salt bath nitriding treatment process.
5. The novel hydraulic assembly for electrohydraulic switching of claim 4 wherein: the motor (02) rotates to drive the external gear pump 05 to rotate through the motor and pump connecting shaft (10), the motor (02) is provided with a rear output shaft, and the hydraulic pump can be driven in a hand-operated mode.
6. The novel hydraulic assembly for electrohydraulic switching of claim 5 wherein: the hydraulic unit and the oil cylinder unit are also included.
7. The novel hydraulic assembly for electrohydraulic switching of claim 6 wherein: the hydraulic unit and the oil cylinder unit are assembled together through a main mounting flange plate (12) to form a hydraulic assembly.
8. The novel hydraulic assembly for electrohydraulic switching of claim 7 wherein: the flange is provided with a deep hole to form a hydraulic oil way.
9. The novel hydraulic assembly for electrohydraulic switching of claim 1 wherein: the oil guide between the flanges is conducted, and oil guide pins (18) are arranged to provide radial sealing.
10. The novel hydraulic assembly for electrohydraulic switching of claim 1 wherein: the oil tank is made of extruded aluminum alloy sections.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211686545.3A CN116557364A (en) | 2022-12-27 | 2022-12-27 | Novel hydraulic assembly for electrohydraulic switch machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211686545.3A CN116557364A (en) | 2022-12-27 | 2022-12-27 | Novel hydraulic assembly for electrohydraulic switch machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116557364A true CN116557364A (en) | 2023-08-08 |
Family
ID=87500693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211686545.3A Pending CN116557364A (en) | 2022-12-27 | 2022-12-27 | Novel hydraulic assembly for electrohydraulic switch machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116557364A (en) |
-
2022
- 2022-12-27 CN CN202211686545.3A patent/CN116557364A/en active Pending
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