CN107747607B - Hydraulic buffer for DC high voltage switch - Google Patents
Hydraulic buffer for DC high voltage switch Download PDFInfo
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- CN107747607B CN107747607B CN201711145489.1A CN201711145489A CN107747607B CN 107747607 B CN107747607 B CN 107747607B CN 201711145489 A CN201711145489 A CN 201711145489A CN 107747607 B CN107747607 B CN 107747607B
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- overflow
- hole
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- 239000000872 buffer Substances 0.000 title claims abstract description 104
- 239000003921 oil Substances 0.000 claims abstract description 40
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims description 28
- 229910000831 Steel Inorganic materials 0.000 claims description 23
- 239000010959 steel Substances 0.000 claims description 23
- 238000009825 accumulation Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000003139 buffering effect Effects 0.000 description 12
- 229920000742 Cotton Polymers 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 4
- 210000001503 joint Anatomy 0.000 description 3
- GQWNECFJGBQMBO-UHFFFAOYSA-N Molindone hydrochloride Chemical compound Cl.O=C1C=2C(CC)=C(C)NC=2CCC1CN1CCOCC1 GQWNECFJGBQMBO-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Classifications
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper
- F16F13/10—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like
- F16F13/105—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper the damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper the plastics spring forming at least a part of the wall of the fluid chamber of the damper the wall being at least in part formed by a flexible membrane or the like characterised by features of partitions between two working chambers
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/10—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using liquid only; using a fluid of which the nature is immaterial
- F16F9/14—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect
- F16F9/16—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts
- F16F9/18—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein
- F16F9/19—Devices with one or more members, e.g. pistons, vanes, moving to and fro in chambers and using throttling effect involving only straight-line movement of the effective parts with a closed cylinder and a piston separating two or more working spaces therein with a single cylinder and of single-tube type
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- 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/32—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Damping Devices (AREA)
Abstract
The invention provides an oil pressure buffer for a direct-current high-voltage switch, which can solve the problem of non-ideal energy absorption effect of the existing oil pressure buffer for the direct-current high-voltage switch. Hydraulic oil is filled in the hollow inner cavity of the outer cylinder, and a buffer device and an accumulator device are sequentially arranged in the hollow inner cavity of the outer cylinder from one side of the rear cover to one side of the outer baffle cover in an extending manner; the buffer device comprises a piston rod and an inner cylinder arranged in the hollow inner cavity, wherein a gap between the outer peripheral wall of the inner cylinder and the inner wall of the outer cylinder forms an overflow channel of hydraulic oil and is connected with the pressure accumulating device, a first buffer cavity and a second buffer cavity which are mutually communicated are arranged in the inner cylinder, the front end of the piston rod sequentially penetrates through the outer baffle cover and the pressure accumulating device and then is connected with a first-stage buffer assembly in the first buffer cavity, a second overflow through hole and a multi-stage first overflow through hole are formed in the peripheral wall of the inner cylinder, and the first buffer cavity and the second buffer cavity are respectively communicated with the overflow channel outside the inner cylinder through the corresponding first overflow through hole and the second overflow through hole.
Description
Technical Field
The invention relates to the technical field of buffers, in particular to a hydraulic buffer, and particularly relates to a hydraulic buffer for a direct-current high-voltage switch.
Background
The direct-current high-voltage switch opening and closing mechanism is a core mechanism of direct-current high-voltage switch equipment, the design is usually separated by adopting an electromagnetic matching disc spring, the separation mechanism is usually designed to have the running speed of 8-20m/s, thereby generating ultrahigh-speed impact kinetic energy, and a buffer for the direct-current high-voltage switch is usually arranged at the bottom of the separation mechanism and is used for absorbing the ultrahigh-speed impact kinetic energy generated by the mechanism, so that the opening and closing mechanism can be smoothly and stably stopped, the separation mechanism is protected from being impacted too much, and the opening and closing spring vibration is eliminated; meanwhile, the brake separating curve process can be more gentle.
The conventional hydraulic buffer for a direct current high-voltage switch is mostly of a fixed damping flow structure, as shown in fig. 1, when the impact head 55 is impacted by external force, the piston rod 54 is driven to push the piston 53 to squeeze the hydraulic oil 520 in the inner tube 52, the hydraulic oil flows out from a plurality of oil drain holes 521 on the inner tube 52 after being pressurized and flows into the rubber pressure-accumulating cotton 56, the rubber pressure-accumulating cotton 56 is compressed to generate a pressure-accumulating space, the buffer generates a curve damping effect in the process that the hydraulic oil sequentially flows out of the oil drain holes on the inner tube 52, when the piston 53 passes through one oil drain hole 521, the damping flow is reduced once until the last oil drain hole is finished in a stroke, at the moment, the external kinetic energy is converted into the heat energy of the buffer, and the heat is dissipated into the air, so that the energy circulation is realized; when the external force is removed, the return spring 57 returns the piston rod 54 to the start position and waits for the next operation. In this way, the hydraulic damper will be able to effectively stop the moving object. However, the existing fixed type damping flow oil pressure buffer has an unsatisfactory energy absorption effect under the ultra-high-speed operation of a direct-current high-voltage switch opening and closing mechanism, and is easy to generate larger rebound vibration, so that the equipment mechanism finally cannot stably operate; in addition, the existing oil pressure buffer adopts rubber pressure accumulating cotton as an pressure accumulating device, and the rubber pressure accumulating cotton is easy to age and easily generate telescopic fatigue in the use process so that the elasticity of the rubber pressure accumulating cotton is poor, thereby reducing and lacking the pressure accumulating capacity and finally influencing the normal use of the oil pressure buffer.
Disclosure of Invention
The invention provides the oil pressure buffer for the direct-current high-voltage switch, which can solve the problems that the existing oil pressure buffer for the direct-current high-voltage switch is not ideal in energy absorption effect and is easy to generate larger rebound vibration on a mechanism to influence the stable operation of the mechanism of equipment.
Its technical scheme is, a hydraulic buffer for direct current high tension switch, it includes buffer, pressure accumulation device and is equipped with the outer jar of cavity inner chamber, the cavity intracavity is filled with hydraulic oil just the both ends of outer jar are sealed through back lid and outer fender lid respectively, the cavity inner chamber of outer jar has set gradually from the outside fender lid one side extension of back lid one side buffer and pressure accumulation device, the back cover be equipped with the oiling mouth of cavity inner chamber UNICOM, install oiling screw in the oiling mouth, its characterized in that: the buffer device comprises a piston rod and an inner cylinder arranged in the hollow inner cavity, wherein a gap between the outer peripheral wall of the inner cylinder and the inner wall of the outer cylinder forms an overflow channel of hydraulic oil and is connected with the pressure accumulating device, a first buffer cavity and a second buffer cavity which are mutually communicated are arranged in the inner cylinder, a first-stage buffer assembly and a second-stage buffer assembly are arranged in the first buffer cavity, the front end of the piston rod sequentially penetrates through the outer baffle cover and the pressure accumulating device and then is connected with the first-stage buffer assembly, a second overflow through hole and a multi-stage first overflow through hole are formed in the peripheral wall of the inner cylinder, and the first buffer cavity and the second buffer cavity are respectively communicated with the overflow channel outside the inner cylinder through corresponding first overflow through holes and second overflow through holes.
Further, the second-stage buffering assembly comprises a second piston and a butterfly spring which are arranged in the second buffering cavity, the second piston is arranged at the communicating position of the second buffering cavity and the first buffering cavity, the front end of the butterfly spring is in butt joint with the bottom surface of the front end of the second piston cavity, the rear end of the butterfly spring is in butt joint with the second piston, an axial overflow channel and a radial overflow channel which are communicated with each other are arranged in the second piston, the axial overflow channel is communicated with the first piston cavity, and the radial overflow channel is communicated with the second overflow through hole.
Further, two groups of belleville springs are arranged, and the two groups of belleville springs are oppositely arranged in an X shape in an arc shape.
Further, the first-stage buffering assembly comprises a first piston and a reset spring which are arranged in the first buffering cavity, the front end of the piston rod sequentially penetrates through the outer baffle cover and the pressure accumulating device and then is connected with the first piston, the rear end of the piston rod is provided with a crashed head, and the front end of the reset spring is in butt joint with the bottom surface of the front end of the first buffering cavity, and the rear end of the reset spring is sleeved with the first piston.
Further, still be equipped with the check valve structure in the first piston, the check valve structure includes the steel ball, be equipped with the steel ball that communicates each other in the first piston and hold chamber and axial through-hole, the steel ball holding in the steel ball holds the intracavity just the diameter of steel ball is greater than the aperture of axial through-hole, axial auxiliary return channel and radial auxiliary return channel that link up each other have been seted up to the front end of piston rod, axial auxiliary return channel with axial through-hole UNICOM, the steel ball holds the chamber orientation one side opening part in first cushion chamber is equipped with the spring pin.
Further, the pressure accumulating device comprises a bearing and a sealing rubber oil bag filled with air, the piston rod is slidably mounted in an inner hole of the bearing, and the sealing rubber oil bag is sleeved on the periphery of the bearing.
Further, the periphery of the bearing is provided with an annular groove, the annular groove and the inner wall of the outer cylinder form an annular cavity, the sealing rubber oil bag is sleeved on the periphery of the bearing and is positioned in the annular cavity, the bearing is positioned on one side of the buffer device, and the annular cavity is communicated with the overflow channel through the through hole.
Further, two ends of the bearing are respectively propped against the inner cylinder and the outer baffle cover, and the joint of the piston rod and the bearing as well as the joint of the bearing and the outer baffle cover are sealed by a sealing element.
Further, a dust cover is arranged between the piston rod and the outer baffle cover.
The invention has the beneficial effects that: the secondary buffer assembly is arranged in the inner cylinder, when the impact force actually received exceeds the design overflow pressure of the primary buffer assembly, the overflow effect can be effectively compensated through the secondary buffer assembly and the second overflow through hole formed in the inner cylinder, so that the impact energy can be fully absorbed, the ideal buffer effect is ensured, and the problem that the normal and stable operation of the mechanism is influenced due to rebound oscillation of the separation mechanism is avoided; the two-stage buffer assembly adopts the belleville spring, so that the structure is simple, the high-efficiency compensation capacity can be realized in the limited axial space of the inner cylinder, and the compensation overflow effect of the two-stage buffer assembly is further ensured; in addition, compared with the traditional rubber pressure accumulating cotton, the pressure accumulating device adopts the sealing rubber oil bag filled with air, and the sealing rubber oil bag has good deformation performance due to good fluidity of the air in the sealing rubber oil bag, so that the sealing rubber oil bag can absorb kinetic energy more stably and moderately, has large elastic deformation and is not easy to age, the lasting stability of the pressure accumulating capacity of the pressure accumulating device is ensured, and the ideal buffering effect is further ensured.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a conventional hydraulic buffer for a dc high voltage switch;
fig. 2 is a schematic diagram of the internal structure of the hydraulic buffer for the dc high voltage switch according to the present invention.
Reference numerals in the drawings:
10-outer cylinder, 11-rear cover, 12-outer baffle, 13-oiling screw, 21-inner cylinder, 211-first overflow through hole, 212-second overflow through hole, 22-piston rod, 221-crashed head, 222-axial auxiliary backflow channel, 223-radial auxiliary backflow channel, 23-first buffer cavity, 231-first piston, 232-return spring, 233-steel ball, 234-steel ball containing cavity, 235-axial through hole, 236-spring pin 24-second buffer cavity, 241-second piston, 242-butterfly spring, 243-axial overflow channel, 244-radial overflow channel, 31-bearing, 32-sealing rubber oil bag, 33-annular cavity, 34-through hole, 41-sealing piece, 42-dust cover, a-overflow channel;
51-outer tube, 52-inner tube, 521-oil drain hole, 53-piston, 54-piston rod, 55-impact head, 56-rubber pressure accumulation cotton, 57-return spring, 58-rear cover, 59-check valve, 510-sealing element, 511-copper bearing, 512-dust-proof sleeve seat and 520-hydraulic oil.
Detailed Description
The terms "front" and "rear" in the present embodiment refer to the direction of the external force applied to the impact head 221, and the side along the direction of the external force is the front, and vice versa.
Referring to fig. 2, the hydraulic buffer for the direct current high voltage switch of the invention comprises a buffer device, a pressure accumulating device and an outer cylinder 10 provided with a hollow inner cavity, wherein hydraulic oil is filled in the hollow inner cavity, two ends of the outer cylinder 10 are respectively sealed by a rear cover 11 and an outer baffle cover 12, the buffer device and the pressure accumulating device are sequentially arranged in the hollow inner cavity of the outer cylinder 10 from one side of the rear cover 11 to one side of the outer baffle cover 12 in an extending manner, an oil filling port communicated with the hollow inner cavity is arranged on the rear cover 12, and an oil filling screw 13 is arranged in the oil filling port; the buffer device comprises a piston rod 22 and an inner cylinder 21 arranged in a hollow inner cavity, a gap between the outer peripheral wall of the inner cylinder 21 and the inner wall of the outer cylinder 10 forms an overflow channel A of hydraulic oil, the overflow channel A is connected with the pressure accumulating device, a first buffer cavity 23 and a second buffer cavity 24 which are mutually communicated are arranged in the inner cylinder 21, a first-stage buffer assembly is arranged in the first buffer cavity 23, a second-stage buffer assembly is arranged in the second buffer cavity 24, the front end of the piston rod 22 sequentially penetrates through the outer baffle cover 12 and the pressure accumulating device and then is connected with the first-stage buffer assembly, a second overflow through hole 212 and a multi-stage first overflow through hole 211 are formed in the peripheral wall of the inner cylinder 21, and the first buffer cavity 23 and the second buffer cavity 24 are respectively communicated with the overflow channel A outside the inner cylinder through the corresponding first overflow through holes 211 and second overflow through holes 212.
The second-stage buffering assembly comprises a second piston 241 and a belleville spring 242 which are arranged in the second buffering cavity 24, the second piston 241 is arranged at the communication position of the second buffering cavity 24 and the first buffering cavity 23, the front end of the belleville spring 242 is abutted with the bottom surface of the front end of the second piston cavity 24, the rear end of the belleville spring is abutted with the second piston 241, an axial overflow channel 243 and a radial overflow 244 channel which are communicated with each other are arranged in the second piston 241, the axial overflow channel 243 is communicated with the first piston cavity 23, and the radial overflow channel 244 can be communicated with the second overflow through hole 212; the two groups of belleville springs 242 are arranged, and the two groups of belleville springs 242 are oppositely arranged in an arc shape; according to the actual bearing requirement, the single-group belleville spring can be a single belleville spring or can be formed by combining two or more than two overlapped single belleville springs so as to ensure a good automatic overflow compensation effect.
The first-stage buffer assembly comprises a first piston 231 and a return spring 232 which are arranged in the first buffer cavity 23, wherein the front end of the piston rod 22 sequentially penetrates through the outer baffle cover 12 and the pressure accumulating device and then is connected with the first piston 231, the rear end of the piston rod is provided with a crashed head 221, the front end of the return spring 232 is abutted with the bottom surface of the front end of the first buffer cavity 23, and the rear end of the return spring is sleeved with the first piston 231; the first piston 231 is internally provided with a check valve structure, the check valve structure comprises a steel ball 233, the first piston 231 is internally provided with a steel ball accommodating cavity 234 and an axial through hole 235 which are communicated with each other, the steel ball 233 is accommodated in the steel ball accommodating cavity 234, the diameter of the steel ball 233 is larger than the aperture of the axial through hole 235, so that the steel ball 233 can completely close the axial through hole 235, the front end of the piston 22 is provided with an axial auxiliary backflow channel 222 and a radial auxiliary backflow channel 223 which are communicated with each other, the axial auxiliary backflow channel 222 is communicated with the axial through hole 235, and a spring pin 236 is arranged at the opening of one side of the steel ball accommodating cavity 233 facing the first buffer cavity 23; the radial auxiliary return passage 223 and the axial auxiliary return passage 222 on the piston rod 22 form an auxiliary return passage for hydraulic oil with the axial through hole 235 and the ball receiving chamber 234 on the first piston 231.
The pressure accumulating device comprises a bearing 31 and a sealing rubber oil bag 32 filled with air, the piston rod 22 is slidably arranged in an inner hole of the bearing 31, and the sealing rubber oil bag 32 is sleeved on the periphery of the bearing 31;
The periphery of the bearing 31 is provided with an annular groove, the annular groove and the inner wall of the outer cylinder 10 form an annular cavity 33, a sealing rubber oil bag 32 is sleeved on the periphery of the bearing 31 and is positioned in the annular cavity 33, one side of the bearing 31 positioned on the buffer device is provided with a through hole 34, and the annular cavity 33 is communicated with the overflow channel A through the through hole 34;
The two ends of the bearing 31 are respectively propped against the inner cylinder 21 and the outer baffle cover 12, the joint of the piston rod 22 and the bearing 31 as well as the joint of the bearing 31 and the outer baffle cover 12 are sealed by a sealing piece 41; a dust boot 42 is provided between the piston rod 22 and the outer cover 12.
The operation of the hydraulic damper of the present invention will be described in detail as follows: when the impact head 221 is impacted by external force, the piston rod 22 is driven to push the first piston 231 to squeeze the hydraulic oil in the inner cylinder 21 and the return spring 232 is compressed, the hydraulic oil flows into the first overflow hole 211 on the inner cylinder 21 after being pressurized, at this time, if the internal pressure of the first buffer cavity 23 exceeds the designed overflow pressure of the inner cylinder, the internal pressure of the first buffer cavity 23 is larger than the pressure of the belleville spring 242, then part of the hydraulic oil flows into the second piston 241 and pushes the second piston 241 to move towards the front side, and the part of the hydraulic oil flows into the axial overflow channel 243 and the radial overflow channel 244 on the second piston 241, when the second piston 241 moves to gradually engage and communicate with the second overflow hole 212 on the inner cylinder 21, the hydraulic oil flows into the second overflow hole 212 through the first overflow hole 211 and the overflow hole 212 respectively, the overflow channel A of the hydraulic oil formed by the gap between the outer peripheral wall of the inner cylinder 21 and the inner wall of the outer cylinder 10, and then flows into the sealing rubber oil bag 32 through the through hole 34 of the bearing 31, and the sealing rubber bag 32 is filled with the air, and the sealing rubber bag 32 is gradually deformed to the belleville spring 242 after the sealing rubber bag 32 is gradually deformed, and the sealing rubber bag 32 is gradually deformed to the outer side, and the sealing pressure is reduced, and the sealing pressure is gradually reduced, and the sealing pressure is increased, and the sealing pressure is increased.
When the external impact force is maximum, the radial overflow of the second piston 242 is completely communicated with the second overflow through hole 212 through the 244, namely, an automatic compensation overflow channel is completely opened, the second piston 241 automatically adjusts the proper overflow sectional area along with the reduction of the external impact force, the second piston 241 plays a role in balancing and compensating the damping of the external impact pressure and the flow of internal hydraulic oil in the whole impact process, the process of absorbing the kinetic energy of the oil pressure buffer presents a stable and perfect damping effect until the external impact kinetic energy stops, when the external force disappears, most of the hydraulic oil at the sealing rubber oil bag 32 flows back into the first buffer cavity 23 through the overflow channel A and the first overflow through hole 211 through the through hole 34, and meanwhile, the return spring 232 returns the first piston 231 to the initial point position to wait for the next external impact; meanwhile, when the external force is eliminated, part of hydraulic oil flows back from the gap between the bearing 31 and the first piston 231 through the radial auxiliary backflow channel 223, the axial auxiliary backflow channel 222, the axial through hole 235 on the first piston 231 and the auxiliary backflow channel formed by the steel ball accommodating cavity 234, and opens the steel ball check valve to flow back into the first buffer cavity 23; at this time, the external kinetic energy is converted into the heat energy of the oil pressure buffer, and the heat energy is emitted into the air by the oil pressure buffer part, so that the energy circulation is realized.
The foregoing describes the embodiments of the present invention in detail, but the description is only a preferred embodiment of the invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications of the invention are intended to fall within the scope of the invention.
Claims (7)
1. A oil pressure buffer for direct current high tension switch, it includes buffer, pressure accumulation device and is equipped with outer jar (10) of cavity inner chamber, cavity inner chamber intussuseption is filled with hydraulic oil just outer jar (10) both ends are sealed through back lid (11) and outer fender lid (12) respectively, the cavity inner chamber of outer jar (10) has set gradually from the outside fender lid (12) one side extension of back lid (11) one side buffer and pressure accumulation device, back lid (11) go up be equipped with the oiling mouth of cavity inner chamber UNICOM, install oiling screw (13) in the oiling mouth, its characterized in that: the buffer device comprises a piston rod (22) and an inner cylinder (21) arranged in the hollow inner cavity, wherein a gap between the outer peripheral wall of the inner cylinder (21) and the inner wall of the outer cylinder (10) forms an overflow channel (A) of hydraulic oil and is connected with the pressure accumulating device, a first buffer cavity (23) and a second buffer cavity (24) which are communicated with each other are arranged in the inner cylinder (21), a first-stage buffer assembly and a second-stage buffer assembly are arranged in the first buffer cavity (23), the front end of the piston rod (22) sequentially penetrates through the outer baffle cover (12) and the pressure accumulating device and then is connected with the first-stage buffer assembly, a second overflow through hole (212) and a multi-stage first overflow through hole (211) are formed in the peripheral wall of the inner cylinder (21), and the first buffer cavity and the second buffer cavity are respectively communicated with the overflow channel (A) outside the inner cylinder (21) through the corresponding first overflow through holes (211) and the second overflow through holes (212);
The secondary buffer assembly comprises a second piston (241) and a belleville spring (242) which are arranged in the second buffer cavity (24), the second piston (241) is arranged at the communication position of the second buffer cavity (24) and the first buffer cavity (23), the front end of the belleville spring (242) is abutted with the bottom surface of the front end of the second buffer cavity (24), the rear end of the belleville spring is abutted with the second piston (241), an axial overflow channel (243) and a radial overflow channel (244) which are communicated with each other are arranged in the second piston (241), and the axial overflow channel (243) is communicated with the first buffer cavity (23); when the piston rod of the buffer device receives external impact force and the impact force actually received exceeds the designed overflow pressure of the primary buffer assembly, and the pressure received by the second piston (241) from the first buffer cavity (23) is larger than the pressure applied by the belleville spring (242), part of hydraulic oil from the first buffer cavity flows to the second piston (241) and pushes the second piston (241) to move towards the front side against the pressure of the belleville spring (242) and enables the radial overflow channel (244) to be communicated with the second overflow through hole (212);
Two groups of belleville springs (242) are arranged, the two groups of belleville springs (242) are oppositely arranged in an X shape in an arc shape, and a single group of belleville springs are formed by combining more than two overlapped single belleville springs.
2. The oil pressure buffer for a direct current high voltage switch according to claim 1, characterized in that: the primary buffer assembly comprises a first piston (231) and a return spring (232) which are arranged in a first buffer cavity (23), the front end of a piston rod (22) sequentially penetrates through the outer baffle cover (12) and the pressure accumulating device, then is connected with the first piston (231), the rear end of the piston rod is provided with a crashed head (221), and the front end of the return spring (232) is abutted to the bottom surface of the front end of the first buffer cavity (23) and the rear end of the return spring is sleeved with the first piston (231).
3. The oil pressure buffer for a direct current high voltage switch according to claim 2, characterized in that: still be equipped with check valve structure in first piston (231), check valve structure includes steel ball (233), be equipped with steel ball holding chamber (234) and axial through-hole (235) of mutual UNICOM in first piston (231), steel ball (233) holding in steel ball holding chamber (234) just the diameter of steel ball (233) is greater than the aperture of axial through-hole (235), axial auxiliary return channel (222) and radial auxiliary return channel (223) that link up each other have been seted up to the front end of piston rod (22), axial auxiliary return channel (222) with axial through-hole (235) UNICOM, steel ball holding chamber (234) orientation one side opening part of first cushion chamber (23) is equipped with spring pin (236).
4. A hydraulic buffer for a dc high voltage switch according to any one of claims 1 to 3, characterized in that: the pressure accumulating device comprises a bearing (31) and a sealing rubber oil bag (32) filled with air, the piston rod (22) is slidably mounted in an inner hole of the bearing (31), and the sealing rubber oil bag (32) is sleeved on the periphery of the bearing (31).
5. The oil pressure buffer for a direct current high voltage switch according to claim 4, wherein: the periphery of bearing (31) is equipped with the ring channel, the ring channel with outer cylinder (10) inner wall forms annular chamber (33), sealed rubber oil bag (32) cover in bearing (31) periphery is located in annular chamber (33), bearing (31) are located one side of buffer has seted up through-hole (34), annular chamber (33) are passed through-hole (34) and overflow channel (A) UNICOM.
6. The oil pressure buffer for a direct current high voltage switch according to claim 5, characterized in that: the two ends of the bearing (31) are respectively propped against the inner cylinder (21) and the outer baffle cover (12), the piston rod (22) is tightly propped against the bearing (31), and the joint of the bearing (31) and the outer baffle cover (12) is sealed by a sealing piece (41).
7. The oil pressure buffer for a direct current high voltage switch according to claim 6, wherein: a dust cover (42) is arranged between the piston rod (22) and the outer baffle cover (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145489.1A CN107747607B (en) | 2017-11-17 | 2017-11-17 | Hydraulic buffer for DC high voltage switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711145489.1A CN107747607B (en) | 2017-11-17 | 2017-11-17 | Hydraulic buffer for DC high voltage switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107747607A CN107747607A (en) | 2018-03-02 |
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| CN201711145489.1A Active CN107747607B (en) | 2017-11-17 | 2017-11-17 | Hydraulic buffer for DC high voltage switch |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108869622B (en) * | 2018-07-24 | 2023-05-23 | 广东机电职业技术学院 | Plunger type buffer device |
| CN110219926B (en) * | 2019-07-05 | 2024-07-05 | 沈思成 | Automatic vibration starting and stopping device and bicycle front fork provided with same |
| CN110513425B (en) * | 2019-08-18 | 2024-04-16 | 哈尔滨盛迪电力设备有限公司 | Bidirectional quick-discharging type air compression in-place buffer device |
| CN110848309A (en) * | 2019-11-19 | 2020-02-28 | 李茂强 | Pressure-controllable oil buffer |
| CN111075880A (en) * | 2019-12-30 | 2020-04-28 | 浙江大学 | Damper based on paper folding rebounding mechanism |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886683A (en) * | 2010-01-29 | 2010-11-17 | 宁波亚德客自动化工业有限公司 | Adjustable hydraulic buffer |
| CN103629288A (en) * | 2012-08-28 | 2014-03-12 | 鸿富锦精密工业（深圳）有限公司 | Buffer |
| CN203784186U (en) * | 2014-04-04 | 2014-08-20 | 佛山市百进一精密机械有限公司 | Buffer |
| CN206361073U (en) * | 2016-10-25 | 2017-07-28 | 苏州西捷克缓冲科技有限公司 | Damping force automatic adjustable oil buffer |
| CN207648041U (en) * | 2017-11-17 | 2018-07-24 | 苏州西捷克缓冲科技有限公司 | A kind of oil buffer for direct-current high-voltage switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204140747U (en) * | 2014-02-21 | 2015-02-04 | 温州泓力达自动化设备有限公司 | The hydraulic buffer that a kind of pretightening force is adjustable |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886683A (en) * | 2010-01-29 | 2010-11-17 | 宁波亚德客自动化工业有限公司 | Adjustable hydraulic buffer |
| CN103629288A (en) * | 2012-08-28 | 2014-03-12 | 鸿富锦精密工业（深圳）有限公司 | Buffer |
| CN203784186U (en) * | 2014-04-04 | 2014-08-20 | 佛山市百进一精密机械有限公司 | Buffer |
| CN206361073U (en) * | 2016-10-25 | 2017-07-28 | 苏州西捷克缓冲科技有限公司 | Damping force automatic adjustable oil buffer |
| CN207648041U (en) * | 2017-11-17 | 2018-07-24 | 苏州西捷克缓冲科技有限公司 | A kind of oil buffer for direct-current high-voltage switch |
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