CN109654086B - High-frequency loaded hydraulic cylinder - Google Patents
High-frequency loaded hydraulic cylinder Download PDFInfo
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- CN109654086B CN109654086B CN201910002882.8A CN201910002882A CN109654086B CN 109654086 B CN109654086 B CN 109654086B CN 201910002882 A CN201910002882 A CN 201910002882A CN 109654086 B CN109654086 B CN 109654086B
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- piston rod
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- cylinder body
- oil
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- 239000003921 oil Substances 0.000 claims abstract description 68
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 18
- 238000013016 damping Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 239000007789 gas Substances 0.000 description 15
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 238000007789 sealing Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1447—Pistons; Piston to piston rod assemblies
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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
- 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
- F15B13/027—Check valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1428—Cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1457—Piston rods
Abstract
The invention discloses a high-frequency loaded hydraulic cylinder, which belongs to the technical field of hydraulic cylinders and comprises the following components: the device comprises a plug, a punched body, an air charging valve, a piston rod, an air piston, a cylinder body, a piston, a one-way valve, a cylinder bottom and an oil charging screw plug; the cylinder bottom is fixed at one end of the cylinder body, and the opening of the end of the cylinder body is closed; the piston rod is matched with the hole shaft at the other end of the cylinder body; the closed end of the piston rod is provided with a punched body and an inflation valve, and the air piston is coaxially arranged in the inner cavity of the piston rod; the piston is coaxially arranged at the opening end of the piston rod, and the axial through hole of the piston is communicated with the inner cavity of the piston rod; the check valve is arranged in a check valve mounting hole of the piston, and when the check valve is in a closed state, the oil passing hole is closed; when the one-way valve is in an open state, hydraulic oil can enter the rod cavity from the rodless cavity through the oil passing hole. The invention is suitable for the test working condition of high-frequency impact products, is convenient to manufacture and install, is simple to use and maintain, has good damping and impact-resistant effects and long service life.
Description
Technical Field
The invention belongs to the technical field of hydraulic cylinders, and particularly relates to a high-frequency loaded hydraulic cylinder.
Background
High-frequency impact products such as hydraulic rock drills and the like need to be subjected to impact performance test verification, but even if hard objects such as steel plates, rocks, cement piers and the like are adopted as loaded parts, the service life is extremely limited; it is necessary to develop an effective high-frequency load test device, which not only meets the test requirements of high-frequency impact products, but also ensures a longer service life.
Disclosure of Invention
In view of the above, the invention provides a high-frequency loaded hydraulic cylinder which is suitable for the test working condition of high-frequency impact products, is convenient to manufacture and install, is simple to use and maintain, has good damping and impact-resistant effects and has long service life.
The invention is realized by the following technical scheme:
a high frequency loaded hydraulic cylinder comprising: the device comprises a plug, a punched body, an air charging valve, a piston rod, an air piston, a cylinder body, a piston, a one-way valve, a cylinder bottom and an oil charging screw plug;
the cylinder body is a cylinder body with two open ends, an oil gas port communicated with the inner cavity of the cylinder body is processed on the cylinder body, a plug is arranged on the oil gas port, and the oil gas port is closed;
the cylinder bottom is fixed at one end of the cylinder body, an opening at the end of the cylinder body is closed, an oil port communicated with the inner cavity of the cylinder body is processed on the cylinder bottom, an oil filling screw plug is arranged on the oil port, and the oil port is closed;
the piston rod is a cylinder body with one end open and one end closed, and is matched with the hole shaft at the other end of the cylinder body; the closed end of the piston rod extends out of the cylinder body, and the open end of the piston rod is positioned in the inner cavity of the cylinder body; the piston rod can move repeatedly along the axial direction of the cylinder body; the closed end of the piston rod is provided with a punched body and an inflation valve, and the inflation valve is communicated with the inner cavity of the piston rod through a small hole processed in the piston rod; the air piston is coaxially arranged in the inner cavity of the piston rod, the outer circumferential surface of the air piston is contacted with the inner circumferential surface of the piston rod, and the air piston can axially and repeatedly move along the piston rod;
the piston is provided with an axial through hole, more than one throttling hole, oil passing holes distributed along the circumferential direction of the piston and one-way valve mounting holes distributed along the circumferential direction of the piston; the oil passing hole is correspondingly communicated with the one-way valve mounting hole; the piston is coaxially arranged at the opening end of the piston rod, the axial through hole of the piston is communicated with the inner cavity of the piston rod, and the outer circumferential surface of the piston is contacted with the inner circumferential surface of the cylinder body; the piston divides the inner cavity of the cylinder body into a rodless cavity and a rod cavity, a cavity between the open end of the piston rod and the cylinder bottom and a cavity between the air piston and the open end of the piston rod are rodless cavities, and an annular cavity between the outer circumferential surface of the piston rod and the inner circumferential surface of the cylinder body is a rod cavity; the cavity between the air piston and the closed end of the piston rod is an air cavity; the oil port is communicated with the rodless cavity, and the oil gas port is communicated with the rod cavity; the small hole is communicated with the air cavity;
the check valve is arranged in a check valve mounting hole of the piston, and when the check valve is in a closed state, the oil passing hole is closed; when the one-way valve is in an open state, hydraulic oil can enter the rod cavity from the rodless cavity through the oil passing hole.
Further, the piston comprises a buffer body which is of an annular structure and is coaxially fixed on the end face of the piston;
when the piston rod drives the piston to move to the limit position in the direction of the cylinder bottom, the left end face of the cylinder bottom is provided with a groove matched with the buffer body, and the buffer body is matched with the groove.
Further, the inner end surface of the cylinder body is provided with a step surface, the left end surface of the piston is provided with a step surface, and when the piston rod drives the piston to move to the limit position in the direction of the punched body, the two step surfaces are matched.
Further, every two oil passing holes are in a pair and correspondingly communicated with one check valve mounting hole.
Further, the one-way valve is arranged in a one-way valve mounting hole of the piston through a one-way valve seat, the one-way valve is a sphere, and the one-way valve seat is an annular sleeve; when the ball body is embedded into the annular sleeve, the one-way valve is closed; when the ball leaves the annular sleeve, the one-way valve opens.
Further, the closed end of the piston rod is provided with a groove, the punched body is arranged in the groove, and the pressed surface of the punched body is an inward concave arc surface.
The beneficial effects are that: (1) According to the invention, the air piston is arranged in the inner cavity of the piston rod, the impact load of the high-frequency impact product is born through the resistance generated by the air in the compression air cavity, and the bearing capacity is increased along with the increase of the stroke of the compression piston rod, so that the high-frequency impact product is damped and impacted through the repeated movement of the piston rod and the air piston, and the service life is long.
(2) According to the invention, the throttle hole and the one-way valve are arranged on the piston, so that when the high-frequency impact product is impacted and returned, the piston rod extends outwards to generate larger damping, the resilience force of the piston rod extending outwards is effectively reduced, and the influence on the high-frequency impact product is avoided.
(3) According to the invention, every two oil passing holes on the piston are communicated with the mounting holes of the one-way valve, so that the one-way valve in an opened state can not shield the two oil passing holes, and the influence on an oil flow channel when the one-way valve is opened is prevented.
(4) The invention has the advantages that the throttle buffer is arranged at the two limiting positions of the movement of the piston rod, so that the rigid impact between the piston rod and the cylinder bottom or the cylinder body caused by the instant overload generated by high-frequency impact products is avoided.
Drawings
FIG. 1 is a structural diagram of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view of B-B of FIG. 1;
the device comprises a 1-plug, a 2-punched body, a 3-charging valve, a 4-piston rod, a 5-small hole, a 6-gas piston, a 7-cylinder body, an 8-orifice, a 9-piston, a 10-oil passing hole, an 11-one-way valve, a 12-one-way valve seat, a 13-oil gas port, a 14-buffer body, a 15-cylinder bottom, a 16-oil charging screw plug and a 17-oil port.
Detailed Description
The invention will now be described in detail by way of example with reference to the accompanying drawings.
This embodiment provides a high frequency loaded hydraulic cylinder, see fig. 1-3, comprising: the device comprises a plug 1, a punched body 2, an inflation valve 3, a piston rod 4, an air piston 6, a cylinder 7, a piston 9, a one-way valve 11, a one-way valve seat 12, a buffer body 14, a cylinder bottom 15 and an oil-filled screw plug 16;
the cylinder body 7 is a cylinder body with two open ends, an oil gas port 13 communicated with the inner cavity of the cylinder body 7 is processed on the cylinder body 7, a plug 1 is arranged on the oil gas port 13, and the oil gas port 13 is closed;
the cylinder bottom 15 is fixed at one end of the cylinder body 7 through a screw, an opening at the end of the cylinder body 7 is closed, an oil port 17 communicated with the inner cavity of the cylinder body 7 is processed on the cylinder bottom 15, an oil filling screw plug 16 is arranged on the oil port 17, and the oil port 17 is closed;
the piston rod 4 is a cylinder body with one end open and one end closed, the piston rod 4 is in shaft fit with the hole at the other end of the cylinder body 7, and a sealing ring is arranged on the fit surface; the closed end of the piston rod 4 extends out of the cylinder 7, and the open end is positioned in the inner cavity of the cylinder 7; the piston rod 4 can axially and repeatedly move along the cylinder 7; the closed end of the piston rod 4 is provided with a groove, a punched body 2 is arranged in the groove, and the pressed surface of the punched body 2 is an inward concave arc surface; the closed end of the piston rod 4 is also provided with an inflation valve 3, and the inflation valve 3 is communicated with the inner cavity of the piston rod 4 through a small hole 5 processed in the piston rod 4; the air piston 6 is coaxially arranged in the inner cavity of the piston rod 4, the outer circumferential surface of the air piston 6 is contacted with the inner circumferential surface of the piston rod 4, and a sealing ring is arranged on the contact surface; the air piston 6 can axially and repeatedly move along the piston rod 4;
the piston 9 is provided with an axial through hole, two throttling holes 8, oil passing holes 10 distributed along the circumferential direction of the through holes and check valve mounting holes distributed along the circumferential direction of the through holes; each two oil passing holes 10 are in a pair and are correspondingly communicated with one check valve mounting hole; the piston 9 is coaxially arranged at the opening end of the piston rod 4, an axial through hole of the piston 9 is communicated with the inner cavity of the piston rod 4, the outer circumferential surface of the piston 9 is contacted with the inner circumferential surface of the cylinder 7, and a sealing ring is arranged on the contact surface; the piston 9 divides the inner cavity of the cylinder body 7 into a rodless cavity and a rod-containing cavity, the cavity between the open end of the piston rod 4 and the cylinder bottom 15 and the cavity between the air piston 6 and the open end of the piston rod 4 are rodless cavities, and the annular cavity between the outer circumferential surface of the piston rod 4 and the inner circumferential surface of the cylinder body 7 is a rod-containing cavity; the cavity between the air piston 6 and the closed end of the piston rod 4 is an air cavity; the oil port 17 is communicated with the rodless cavity, and the oil gas port 13 is communicated with the rod cavity; the small hole 5 is communicated with the air cavity;
the check valve 11 is arranged in a check valve mounting hole of the piston 9 through a check valve seat 12, wherein the check valve 11 is a sphere, and the check valve seat 12 is an annular sleeve; when the ball body is embedded into the annular sleeve, the one-way valve 11 is closed, so that the oil passing hole 10 is closed; when the ball leaves the annular sleeve, the one-way valve 11 is opened, and hydraulic oil can enter the rod cavity from the rod cavity through the oil passing hole 10;
the buffer body 14 is of an annular structure and is coaxially fixed on the end face of the piston 9; when the piston rod 4 drives the piston 9 to move to the limit position in the direction of the cylinder bottom 15, namely, the right end face of the piston 9 is abutted against the left end face of the cylinder bottom 15, the left end face of the cylinder bottom 15 is provided with a groove matched with the buffer body 14, the buffer body 14 is matched with the groove, oil liquid at the cylinder bottom is closed by the groove matching surface and can only be discharged through an annular gap matched with the groove, so that throttling buffer of the buffer body 14 and the cylinder bottom 15 is realized; when the piston rod 4 drives the piston 9 to move to the direction of the punched body 2 to a limit position, namely, the left end face of the piston 9 and the inner end face of the cylinder 7 reach a set gap (the gap is used for enabling the oil passing hole 10 to be always communicated with the oil gas port 13), the inner end face of the cylinder 7 is processed with a step face, the left end face of the piston 9 is processed with a step face, the two step faces are matched, oil in the left cavity of the piston 9 is sealed by the matching face and can only be discharged through a matched annular gap, and throttling buffering of the piston 9 and the cylinder 7 is realized.
Working principle: before the hydraulic cylinder is used for loading work, the oil filling screw plug 16 and the plug 1 are removed, the charging valve 3 is opened, hydraulic oil is filled into the rodless cavity through the oil port 17, the hydraulic oil in the rodless cavity pushes the piston rod 4 and the air piston 6 to move towards the direction of the punched body 2, and the one-way valve 11 is in an open state; simultaneously, air in the air cavity is discharged through the air charging valve 3, and air in the rod cavity is discharged through the oil gas port 13; after the piston rod 4 is completely extended (i.e. the piston rod 4 drives the piston 9 to move to the limit position in the direction of the punched body 2), the air piston 6 contacts with the closed end of the piston rod 4, and the oil filling plug screw 16 is used for sealing the oil port 17; then, dry nitrogen is filled into the air cavity through the charging valve 3, and the air piston 6 is pushed to move towards the opening end of the piston rod 4; because the air piston 6 compresses the hydraulic oil in the rodless cavity, the hydraulic oil in the rodless cavity pushes the one-way valve 11 to leave the one-way valve seat 12, so that the one-way valve 11 is opened, the hydraulic oil in the rodless cavity enters the rod cavity through the oil passing hole 10 and the throttle 8, flows to the oil gas port 13 and is discharged out of the hydraulic cylinder through the oil gas port 13; stopping filling nitrogen until the air piston 6 is in contact with the piston 9 arranged at the opening end of the piston rod 4 and reaches the set pressure of nitrogen, and sealing the oil gas port 13 by using the plug 1; at this time, the piston rod 4 is still in a fully extended state, which is the initial state of the hydraulic cylinder when carrying out loading work;
when the hydraulic cylinder carries out loading work, the hydraulic cylinder in an initial state is horizontally or vertically fixed, and a tested high-frequency impact product is arranged on the concave arc surface of the punched body 2;
when the high-frequency impact product impacts the hydraulic cylinder, the piston rod 4 is compressed, namely the piston rod 4 is pushed to move towards the cylinder bottom 15, the piston rod 4 compresses hydraulic oil in the rodless cavity, the pressure of the hydraulic oil in the rodless cavity is increased, the one-way valve 11 is pushed to leave the one-way valve seat 12, the one-way valve 11 is opened, the hydraulic oil in the rodless cavity rapidly flows into the rod cavity through the oil passing hole 10 and the throttle 8, and the piston rod 4 is further pushed to move towards the cylinder bottom 15; because the volume of the hydraulic oil in the rodless cavity is continuously reduced, the hydraulic oil in the rodless cavity pushes the air piston 6 to move towards the direction of the flushed body 2 so as to increase the volume of the hydraulic oil in the rodless cavity, and the movement of the air piston 6 can compress the nitrogen in the air cavity, so that the pressure of the nitrogen in the air cavity is increased; the resistance generated by the compressed nitrogen is used for bearing the impact load of high-frequency impact products;
the high-frequency impact product increases along with the stroke of pushing the piston rod 4 to move, the nitrogen resistance in the received air cavity also increases continuously, and when the impact force of the high-frequency impact product pushing the piston rod 4 to move is balanced with the received nitrogen resistance, the impact movement of the high-frequency impact product stops, namely the piston rod 4 is not compressed any more;
when the high-frequency impact product is impacted and returned, the compression external force is released, the high-pressure nitrogen in the air cavity pushes the air piston 6 to move towards the cylinder bottom 15, so that the piston rod 4 generates larger outward-extending resilience force, namely, the piston rod 4 is pushed to move towards the direction of the impacted body 2; meanwhile, the piston rod 4 moves towards the direction of the punched body 2, hydraulic oil in a rod cavity is compressed, and as the pressure of the hydraulic oil in a rodless cavity is increased, the one-way valve 11 is pushed to be nested in the one-way valve seat 12, so that the one-way valve 11 is closed, the hydraulic oil in the rod cavity can only slowly flow into the rodless cavity through the throttle 8, the piston rod 4 is subjected to larger overhanging damping, and the piston rod 4 is prevented from moving towards the direction of the punched body 2; thus, the piston rod 4 can be ensured to quickly return along with the high-frequency impact product, and the resilience of the piston rod 4 to the high-frequency impact product can be controlled, so that the influence on the high-frequency impact product is avoided.
If the instantaneous impact force of the high-frequency impact product exceeds a set value, the piston rod is compressed, so that the piston rod 4 drives the piston 9 to move to the limit position in the direction of the cylinder bottom 15, and the buffer body 14 is matched with a groove on the left end surface of the cylinder bottom 15, so that throttling buffer of the piston 9 and the cylinder bottom 15 is realized; if the instantaneous impact return force of the high-frequency impact product exceeds a set value, the piston rod 4 is pulled out, so that the piston rod 4 drives the piston 9 to move towards the direction of the punched body 2 to a limit position, and the step surface of the left end surface of the piston 9 is matched with the step surface of the inner end surface of the cylinder 7, so that throttling buffer of the piston 9 and the cylinder 7 is realized; the piston rod 4 can be prevented from being damaged due to hard impact with the cylinder bottom 15 or the cylinder body 7, and the high-frequency loaded hydraulic cylinder is further adversely affected.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A high frequency loaded hydraulic cylinder comprising: the device comprises a plug (1), a punched body (2), an air charging valve (3), a piston rod (4), an air piston (6), a cylinder body (7), a piston (9), a one-way valve (11), a cylinder bottom (15) and an oil charging screw plug (16);
the cylinder body (7) is a cylinder body with two open ends, an oil gas port (13) communicated with the inner cavity of the cylinder body is processed on the cylinder body (7), a plug (1) is arranged on the oil gas port (13), and the oil gas port (13) is closed;
the cylinder bottom (15) is fixed at one end of the cylinder body (7), an opening at the end of the cylinder body (7) is closed, an oil port (17) communicated with the inner cavity of the cylinder body (7) is processed on the cylinder bottom (15), an oil filling screw plug (16) is arranged on the oil port (17), and the oil port (17) is closed;
the piston rod (4) is a cylinder body with one end open and one end closed, and the piston rod (4) is in shaft fit with the hole at the other end of the cylinder body (7); the closed end of the piston rod (4) extends out of the cylinder body (7), and the open end is positioned in the inner cavity of the cylinder body (7); the piston rod (4) can axially and repeatedly move along the cylinder body (7); the closed end of the piston rod (4) is provided with a punched body (2) and an inflation valve (3), and the inflation valve (3) is communicated with the inner cavity of the piston rod (4) through a small hole (5) processed in the piston rod (4); the air piston (6) is coaxially arranged in the inner cavity of the piston rod (4), the outer circumferential surface of the air piston (6) is in contact with the inner circumferential surface of the piston rod (4), and the air piston (6) can axially and repeatedly move along the piston rod (4);
the piston (9) is provided with an axial through hole, more than one throttle hole (8), oil passing holes (10) distributed along the circumferential direction of the throttle hole and one-way valve mounting holes distributed along the circumferential direction of the throttle hole; the oil passing hole (10) is correspondingly communicated with the one-way valve mounting hole; the piston (9) is coaxially arranged at the opening end of the piston rod (4), an axial through hole of the piston (9) is communicated with the inner cavity of the piston rod (4), and the outer circumferential surface of the piston (9) is contacted with the inner circumferential surface of the cylinder body (7); the piston (9) divides the inner cavity of the cylinder body (7) into a rodless cavity and a rod cavity, a cavity between the open end of the piston rod (4) and the cylinder bottom (15) and a cavity between the air piston (6) and the open end of the piston rod (4) are rodless cavities, and an annular cavity between the outer circumferential surface of the piston rod (4) and the inner circumferential surface of the cylinder body (7) is a rod cavity; the cavity between the air piston (6) and the closed end of the piston rod (4) is an air cavity; the oil port (17) is communicated with the rodless cavity, and the oil gas port (13) is communicated with the rod cavity; the small hole (5) is communicated with the air cavity;
the check valve (11) is arranged in a check valve mounting hole of the piston (9), and when the check valve (11) is in a closed state, the oil passing hole (10) is closed; when the one-way valve (11) is in an open state, hydraulic oil can enter the rod cavity from the rod cavity through the oil passing hole (10);
the piston also comprises a buffer body (14), wherein the buffer body (14) is of an annular structure and is coaxially fixed on the end face of the piston (9);
when the piston rod (4) drives the piston (9) to move to the limit position in the direction of the cylinder bottom (15), a groove matched with the buffer body (14) is processed on the left end surface of the cylinder bottom (15), and the buffer body (14) is matched with the groove;
the inner end surface of the cylinder body (7) is provided with a step surface, the left end surface of the piston (9) is provided with a step surface, and when the piston rod (4) drives the piston (9) to move to the limit position in the direction of the punched body (2), the two step surfaces are matched.
2. A high frequency loaded hydraulic cylinder according to claim 1, wherein each two of said oil passing holes (10) are paired and communicate with a check valve mounting hole.
3. A high frequency loaded hydraulic cylinder according to claim 2, characterized in that the non-return valve (11) is mounted in the non-return valve mounting hole of the piston (9) through a non-return valve seat (12), the non-return valve (11) is a sphere, and the non-return valve seat (12) is an annular sleeve; when the ball body is embedded into the annular sleeve, the one-way valve (11) is closed; when the ball leaves the annular sleeve, the one-way valve (11) opens.
4. A high-frequency loaded hydraulic cylinder as claimed in claim 1, wherein the closed end of the piston rod (4) is provided with a groove, the punched body (2) is arranged in the groove, and the pressed surface of the punched body (2) is an inward concave arc surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910002882.8A CN109654086B (en) | 2019-01-02 | 2019-01-02 | High-frequency loaded hydraulic cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910002882.8A CN109654086B (en) | 2019-01-02 | 2019-01-02 | High-frequency loaded hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN109654086A CN109654086A (en) | 2019-04-19 |
| CN109654086B true CN109654086B (en) | 2023-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910002882.8A Active CN109654086B (en) | 2019-01-02 | 2019-01-02 | High-frequency loaded hydraulic cylinder |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410444B (en) * | 2019-07-22 | 2021-02-05 | 中国铁建重工集团股份有限公司 | Active impact receiving buffer device and impact equipment |
| CN110864026A (en) * | 2019-11-21 | 2020-03-06 | 衡阳市林肯液压设备有限公司 | Buffering hydraulic cylinder with good sealing performance |
| CN111721607A (en) * | 2020-07-01 | 2020-09-29 | 湖南农业大学 | Oil-gas mixing device capable of simulating rocks with different hardness |
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| GB1050327A (en) * | 1961-02-06 | 1900-01-01 | ||
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| CN104564908A (en) * | 2014-12-31 | 2015-04-29 | 中船重工中南装备有限责任公司 | Buffer hydraulic cylinder |
| CN104776084A (en) * | 2015-04-02 | 2015-07-15 | 中船重工中南装备有限责任公司 | Powerful mechanical self-locking hydraulic cylinder |
| CN205669520U (en) * | 2016-06-16 | 2016-11-02 | 新昌县佛城制冷有限公司 | buffering structure of hydraulic cylinder |
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| CN2615406Y (en) * | 2003-04-29 | 2004-05-12 | 天津特精液压股份有限公司 | Piston type single-action damper hydraulic cylinder |
| CN2693505Y (en) * | 2003-12-23 | 2005-04-20 | 煤炭科学研究总院太原分院 | Oil-gas type buffering and damping oil cylinder for vehicle for mining |
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| CN104564908A (en) * | 2014-12-31 | 2015-04-29 | 中船重工中南装备有限责任公司 | Buffer hydraulic cylinder |
| CN104776084A (en) * | 2015-04-02 | 2015-07-15 | 中船重工中南装备有限责任公司 | Powerful mechanical self-locking hydraulic cylinder |
| CN205669520U (en) * | 2016-06-16 | 2016-11-02 | 新昌县佛城制冷有限公司 | buffering structure of hydraulic cylinder |
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| CN109654086A (en) | 2019-04-19 |
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