CN110159610B - Plug of hydraulic device working cylinder and hydraulic device working cylinder - Google Patents
Plug of hydraulic device working cylinder and hydraulic device working cylinder Download PDFInfo
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- CN110159610B CN110159610B CN201910346143.0A CN201910346143A CN110159610B CN 110159610 B CN110159610 B CN 110159610B CN 201910346143 A CN201910346143 A CN 201910346143A CN 110159610 B CN110159610 B CN 110159610B
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- working cylinder
- buffer sleeve
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- 230000000903 blocking effect Effects 0.000 claims abstract description 8
- 238000013016 damping Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 abstract description 41
- 230000000694 effects Effects 0.000 abstract description 11
- 230000007246 mechanism Effects 0.000 description 12
- 230000003139 buffering effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 230000009471 action Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000009193 crawling Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
- F15B15/221—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke for accelerating the stroke, e.g. by area increase
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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
- F15B2215/00—Fluid-actuated devices for displacing a member from one position to another
- F15B2215/30—Constructional details thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to a plug of a hydraulic device working cylinder and the hydraulic device working cylinder, wherein the plug of the hydraulic device working cylinder comprises a central hole, a buffer shaft on a piston of the hydraulic device working cylinder is inserted into the central hole, and the plug is also provided with a stop end face for blocking an oil passing hole on a buffer sleeve when the plug is matched with a buffer sleeve stop; a groove is arranged on the end face of the stop and is communicated with the central hole; or the plug is provided with a communicating channel, one end opening of the communicating channel is arranged on the end face of the stop, and the other end opening is arranged on the corresponding wall surface of the plug so as to be communicated with the Z cavity of the hydraulic device working cylinder. When the hydraulic device working cylinder is started, the oil in the groove or the opening of the communication channel at the end face of the stop has a pushing effect on the end face of the buffer sleeve close to the plug of the hydraulic device working cylinder, so that the pushing force of the oil on the buffer sleeve is increased, and the starting force of the hydraulic device working cylinder is increased.
Description
Technical Field
The invention relates to a plug of a hydraulic device working cylinder and the hydraulic device working cylinder.
Background
The hydraulic operating mechanism utilizes the incompressible principle of liquid to send high-pressure oil to two sides of a working cylinder to realize the opening and closing of the circuit breaker, such as the hydraulic operating mechanism of the circuit breaker disclosed in the invention patent application with the publication number of CN 101527206A.
As shown in fig. 1 and 2, a working cylinder of a hydraulic operating mechanism in the prior art includes a cylinder body 1, a plug 4 for plugging one end of a piston cavity, a piston 2 for guiding and movably fitting in the piston cavity of the cylinder body 1, and a cushion sleeve 3 for axially movably fitting in the piston cavity. The working process of the working cylinder when the hydraulic operating mechanism is switched on and started is as follows: oil enters the lower part of the working cylinder from the Z cavity 6 through the central hole of the plug 4, the buffer sleeve 3 and the piston 2 are pushed to move upwards by the stroke of L2, then the buffer sleeve 3 is stopped by the stopping step in the piston cavity, and the oil enters the piston cavity from the oil through hole 5 of the buffer sleeve 3 and the gap between the buffer sleeve 3 and the piston 2, and the piston 2 is pushed to move continuously in the direction away from the plug 4. The Z cavity 6 is a control oil cavity communicated with the control oil port in a control valve of the hydraulic operating mechanism.
The above described cylinder has the following problems: during closing operation, before the cushion collar 3 leaves the end cap 4, the action area of initial fluid is only the hole area of cushion collar 3, leads to fluid not enough to the initial driving force of cushion collar 3, and then causes the initial driving force to piston 2 not enough, and piston 2 appears "crawling" phenomenon, leads to closing time lengthening, perhaps closing time unstability.
Disclosure of Invention
The invention aims to provide a hydraulic device working cylinder, which aims to solve the technical problem that the starting of the hydraulic device working cylinder is slow in the prior art; the invention also aims to provide a plug of a working cylinder of the hydraulic device, which solves the problem.
The plug of the hydraulic device working cylinder adopts the following technical scheme:
the plug of the hydraulic device working cylinder comprises a central hole, the central hole is inserted by a buffer shaft on a piston of the hydraulic device working cylinder, and the plug is also provided with a stop end face for blocking an oil passing hole in the buffer sleeve when the plug is matched with the stop of the buffer sleeve; a groove is arranged on the stop end face of the plug of the hydraulic device working cylinder and communicated with the central hole; or, a communication channel is arranged on the plug of the hydraulic device working cylinder, an opening at one end of the communication channel is arranged on the end face of the stop, and an opening at the other end of the communication channel is arranged on the corresponding wall surface of the plug of the hydraulic device working cylinder so as to be communicated with the Z cavity of the hydraulic device working cylinder.
The invention has the beneficial effects that: the plug of the hydraulic device working cylinder is arranged at the end of one end of the piston cavity, which corresponds to the buffer stroke end of the piston, when the hydraulic device working cylinder is started, before the buffer sleeve moves, oil can enter the groove through the central hole, or the oil enters the communicating channel communicated with the Z cavity, except that the oil in the inner hole of the buffer sleeve has a pushing effect on the buffer sleeve and the piston, the oil in the opening of the stop end face of the groove or the communicating channel also has a pushing effect on the end face, close to the plug of the hydraulic device working cylinder, of the buffer sleeve, compared with the prior art, the pushing force of the oil on the buffer sleeve is increased, the starting force of the hydraulic device working cylinder is increased, and the starting speed of the hydraulic device working cylinder is increased; in addition, under the combined action of the oil in the inner hole of the buffer sleeve and the oil in the notch or the communication channel of the groove at the opening of the stop end face, the buffer sleeve can quickly leave the stop end face of the plug of the hydraulic device working cylinder and open the oil passing hole in the buffer sleeve, so that the starting force of the hydraulic device working cylinder is increased by increasing the oil passing amount, and the starting speed of the hydraulic device working cylinder is increased.
In order to further improve the starting speed of the hydraulic device working cylinder, more than two grooves are formed in the circumferential direction of the plug of the hydraulic device working cylinder, the structural strength of the plug of the hydraulic device working cylinder is guaranteed, the more the grooves are, the larger the action area of the initial oil on the buffer sleeve is, the larger the starting force of the hydraulic device working cylinder is, and the higher the starting speed of the hydraulic device working cylinder is.
In order to ensure the stress balance of the buffer sleeve and increase the working stability of the hydraulic device working cylinder, the grooves are uniformly distributed along the circumferential direction of the plugs of the hydraulic device working cylinder.
In order to further increase the starting speed of the working cylinder of the hydraulic device, the central hole is provided with a diameter expansion section, and an opening of the central hole, which is used for one end close to the piston, is formed by the diameter expansion section. The inner diameter of the opening part of the diameter expansion section is larger than the aperture of one end, close to the plug, of the inner hole of the buffer sleeve, when the hydraulic device working cylinder is started, oil in the diameter expansion section has a pushing effect on the end face, close to the plug of the hydraulic device working cylinder, of the buffer sleeve, the pushing force of the oil on the buffer sleeve is increased, the starting force of the hydraulic device working cylinder is increased, and therefore the starting speed of the hydraulic device working cylinder is increased.
In this scheme the diameter enlarges the section and includes the flaring section that increases gradually to drill way direction size along the hole bottom of centre bore, and diameter enlarges that the section aperture change gradient is little, is favorable to guaranteeing the flow stability of fluid in the diameter enlarges the section to guarantee the stability when hydraulic means working cylinder starts.
In the scheme, the flaring section is a taper hole section, and the taper hole section is convenient to design and process.
The working cylinder of the hydraulic device adopts the following technical scheme:
the hydraulic device working cylinder comprises a cylinder body and a piston; a piston cavity is arranged in the cylinder body, the piston is movably assembled in the piston cavity along the axial direction of the cylinder body in a guiding manner, a stopping step is arranged on the inner wall of one end of the piston cavity, which corresponds to the buffer stroke tail end of the piston, and a plug is arranged at the end head of the end; the buffer sleeve is movably arranged between the stop step and the plug along the axial direction of the cylinder body, an inner hole for inserting the buffer shaft of the piston is formed in the buffer sleeve, and an oil passing hole which penetrates through the buffer sleeve along the axial direction is further formed in the buffer sleeve; the plug comprises a central hole, the central hole is used for inserting a buffer shaft on a piston of the hydraulic device working cylinder, and the plug is also provided with a stop end face which is used for plugging an oil passing hole in the buffer sleeve when the plug is matched with the stop of the buffer sleeve; a groove is arranged on the stop end face of the plug and communicated with the central hole; or the plug is provided with a communicating channel, one end opening of the communicating channel is arranged on the end face of the stop, and the other end opening is arranged on the corresponding wall surface of the plug so as to be communicated with the Z cavity of the hydraulic device working cylinder.
The invention has the beneficial effects that: when the hydraulic device working cylinder is started, before the buffer sleeve moves, oil can enter the groove through the central hole, or the oil enters a communicating channel communicated with the Z cavity, the oil in the inner hole of the buffer sleeve has a pushing effect on the buffer sleeve and the piston, and the oil in the notch of the groove or the communicating channel at the opening of the stop end face also has a pushing effect on the end face, close to the plug, of the buffer sleeve; in addition, under the combined action of oil in the inner hole of the buffer sleeve and the oil at the opening of the stop end face of the groove or the communicating channel, the buffer sleeve can quickly leave the stop end face of the plug and open the oil passing hole in the buffer sleeve, so that the starting force of the hydraulic device working cylinder is increased by increasing the oil passing amount, and the starting speed of the hydraulic device working cylinder is increased.
For further improving the starting speed of the hydraulic device working cylinder, the grooves are circumferentially arranged along the plugs more than two grooves, the structural strength of the plugs is guaranteed, the more the number of the grooves is, the larger the acting area of the initial oil on the buffer sleeve is, the larger the starting force of the hydraulic device working cylinder is, and the faster the starting speed of the hydraulic device working cylinder is.
In order to ensure the stress balance of the buffer sleeve and increase the working stability of the working cylinder of the hydraulic device, the grooves are uniformly distributed along the circumferential direction of the plugs in the scheme.
In order to further increase the starting speed of the working cylinder of the hydraulic device, the central hole of the plug is provided with a diameter expansion section, and an opening of the central hole, which is used for being close to one end of the piston, is formed by the diameter expansion section. The internal diameter of the opening part of the diameter expansion section is larger than the aperture of one end, close to the end cap, of the inner hole of the buffer sleeve, when the hydraulic device working cylinder is started, oil in the diameter expansion section has a pushing effect on the end face, close to the end cap, of the buffer sleeve, the pushing force of the oil on the buffer sleeve is increased, the starting force of the hydraulic device working cylinder is increased, and therefore the starting speed of the hydraulic device working cylinder is increased.
In this scheme the diameter enlarges the section and includes the flaring section that increases gradually to drill way direction size along the hole bottom of centre bore, and diameter enlarges that the section aperture change gradient is little, is favorable to guaranteeing the flow stability of fluid in the diameter enlarges the section to guarantee the stability when hydraulic means working cylinder starts.
In the scheme, the flaring section is a taper hole section, and the taper hole section is convenient to design and process.
For further improving the starting speed of the hydraulic device working cylinder, in the scheme, the radial outer end of the groove is radially positioned outside the oil passing hole in the plug, the buffer sleeve is assembled in the piston cavity in a rotation stopping manner, so that the size of the groove can radially extend to a larger length in the plug, the contact area of the initial oil and the buffer sleeve is increased, and the starting speed of the hydraulic device working cylinder is increased.
Drawings
FIG. 1 is a schematic view of a portion of a prior art hydraulic cylinder;
FIG. 2 is a view taken along line A-A of FIG. 1;
FIG. 3 is a schematic partial view of a first embodiment of a cylinder of the hydraulic apparatus of the present invention;
FIG. 4 is a top view of the plug of FIG. 3;
FIG. 5 is a view from the B-B direction of FIG. 3;
FIG. 6 is a front view of the cushion collar of FIG. 3;
FIG. 7 is a top view of the cushion collar of FIG. 3;
FIG. 8 is a state diagram of the connection of the working cylinder of the hydraulic apparatus of the present invention to the control valve;
FIG. 9 is a schematic structural diagram of a bulkhead of a second embodiment of a cylinder of the hydraulic apparatus of the present invention;
FIG. 10 is a top view of FIG. 9;
FIG. 11 is a schematic structural view of a plug of a third embodiment of a cylinder of the hydraulic apparatus of the present invention;
FIG. 12 is a top view of FIG. 11;
FIG. 13 is a schematic structural view of a bulkhead of a fourth embodiment of a cylinder of the hydraulic apparatus of the present invention;
fig. 14 is a top view of fig. 13.
In the figure: 1-a cylinder body; 2-a piston; 3-a buffer sleeve; 4-plug; 5-oil passing holes; 6-Z cavity; 11-a cylinder body; 12-a piston; 13-a buffer sleeve; 14-plug; 15-oil passing holes; 16-oil passing groove; 17-oil through groove; 19-P cavity; 20-T cavity; 21-a control valve; 22-a fuel tank; 23-an accumulator; 111-stop step; 112-a piston cavity; 113-Z cavity; 121-a buffer shaft; 141-a central hole; 142-a via; 143-a stop end face; 144-a groove; 145-upturning edge; 146-a cone hole section; 1431-stop end face; 1411-a central well; 1441-a communication channel; 1432-stop end face; 1412-a central hole; 1421-via; 1442-a communication groove; 1422-vias; 1433-stop end face; 1443-connecting the channels.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
In the first embodiment of the hydraulic device cylinder according to the present invention, as shown in fig. 3, the hydraulic device cylinder includes a cylinder body 11 and a piston 12, a piston cavity 112 is disposed in the cylinder body 11, the piston 12 is movably assembled in the piston cavity 112 along an axial direction of the cylinder body 11, a stopping step 111 is disposed on an inner wall of one end of the piston cavity 112 corresponding to a buffering stroke end of the piston 12, and a plug 14 is disposed at an end of the end. A center hole 141 into which the buffer shaft 121 of the piston 12 is inserted is formed at the center of the stopper 14.
The hydraulic device working cylinder further comprises a buffer sleeve 13, an inner hole for inserting the buffer shaft 121 of the piston 12 is formed in the buffer sleeve 13, and the buffer sleeve 13 is movably arranged between the stop step 111 and the plug 14 along the axial direction of the cylinder body 11. The buffer sleeve 13 is provided with an oil passing hole 15 penetrating in the axial direction, and the plug 14 is further provided with a stopper end face 143 for blocking the oil passing hole 15 when engaged with the buffer sleeve 13.
In the present embodiment, the plug 14 is fixedly connected to the cylinder 11 through a bolt, as shown in fig. 3 and 4, an outward-turned edge 145 is disposed at an end of the plug 14 away from the stop end face 143, a connection hole (not shown) is disposed on the outward-turned edge 145, a threaded hole (not shown) corresponding to the connection hole is disposed on the cylinder 11, and the bolt passes through the connection hole and is fixedly connected to the threaded hole, so as to fix the plug 14 at the end of the cylinder 11.
The cylinder body 11 is provided with a Z cavity 113, the plug 14 is provided with a through hole 142, and two ends of the through hole 142 are respectively communicated with the central hole 141 of the plug 14 and the Z cavity 113. The distance between the stop step 111 and the stop end face 143 of the plug 14 is greater than the axial dimension of the buffer sleeve 13, so that the buffer sleeve 13 can move axially along the cylinder 11.
As shown in fig. 3 and 4, the stopping end surface 143 of the plug 14 is provided with four grooves 144, the grooves 144 extend along the radial direction of the plug 14, and penetrate through the hole wall of the central hole 141 to communicate the grooves 144 with the central hole 141, in this embodiment, the number of the grooves 144 is four along the circumferential direction of the plug 14, and the four grooves 144 are uniformly distributed along the circumferential direction of the plug 14. It should be noted that, in this embodiment, the radially outer end of the groove 144 is located inside the oil passing hole 15 in the radial direction of the plug 14, so as to avoid the influence on the buffering effect of the buffering sleeve 13 caused by the communication between the groove 144 and the oil passing hole 15 when the plug 14 is in stop fit with the buffering sleeve 13.
As shown in fig. 5 to 7, the oil groove 16 is provided on the outer side wall of the buffer sleeve 13, the oil groove 16 forms openings at two end surfaces of the buffer sleeve 13, one end opening of the oil groove 16 away from the plug 14 communicates with the piston cavity 112, and the other end opening is blocked by the blocking end surface 143 of the plug 14 when the buffer sleeve 13 and the plug 14 are in blocking fit. The oil passing groove 16 is located on the outer side of the oil passing hole 15 in the radial direction of the buffer sleeve 13, so that a certain interval is formed between the oil passing groove 16 and the oil passing hole 15, and the structural strength of the buffer sleeve is guaranteed.
As shown in fig. 6 and 7, an end surface of one end of the buffer sleeve 13, which is far away from the plug 14, is provided with an oil through groove 17 extending in the radial direction, one end of the oil through groove 17 penetrates through the inner hole wall of the buffer sleeve 13 and is communicated with the inner hole of the buffer sleeve 13, and the radial outer end of the oil through groove 17 is communicated with the oil through groove 16. In this embodiment, four oil passing grooves 16 are uniformly distributed along the circumferential direction of the buffer sleeve 13, and four oil passing grooves 17 are also uniformly distributed along the circumferential direction of the buffer sleeve 13.
The notch of crossing oil groove 16 in this embodiment is the flaring, and is concrete, crosses oil groove 16 and includes two groove lateral walls and the tank bottom wall of connecting two groove lateral walls, and two groove lateral walls are the V-arrangement setting, make the width that the notch of crossing oil groove 16 is close to the tank bottom be less than the width of keeping away from the tank bottom. The radial outer end of the oil through groove 17 is arranged on the bottom wall of the oil through groove 16, and the width of the oil through groove 17 is equal to the width of the bottom wall of the oil through groove 16.
As shown in fig. 8, the hydraulic device working cylinder is applied to a hydraulic actuator, a control valve 21 of the hydraulic actuator is used for controlling the action of the hydraulic device working cylinder, and an accumulator 23 is communicated with the piston cavity 112 through the P cavity 19. The Z cavity 113, i.e. a control oil cavity in the control valve 21 of the hydraulic operating mechanism, which is communicated with the control oil port, controls the communication between the Z cavity 113 and the P cavity 19 and the T cavity 20 through the control valve 21 to control the operation of the hydraulic device working cylinder. The piston 12 divides the piston chamber 112 into two parts, namely a first part and a second part, wherein the first part is arranged near the closing position of the piston 12, the second part is arranged near the opening position of the piston 12, and the P chamber 19 is always communicated with the first part of the piston chamber 112. The buffer sleeve arranged in the second part is the buffer sleeve 13 of the invention and is used for improving the starting speed of the hydraulic operating mechanism during closing, and the structure of the buffer sleeve in the first part is the same as that of the buffer sleeve in the prior art; in other embodiments, the damping sleeve in the first part and the damping sleeve in the second part are both the damping sleeve 13 of the present invention, but the structure of the damping sleeve arranged in the first part needs to be designed adaptively according to the specific structure of the working cylinder of the hydraulic device.
Specifically, in the opening position, the Z cavity 113 is communicated with the T cavity 20 through the control valve 21 and is communicated with the oil tank 22, and low-pressure oil is filled in the Z cavity 113, so that closing operation can be performed. After the control valve 21 receives a closing command, the valve core of the control valve 21 is switched, oil in the P cavity 19 enters the Z cavity 113 at the lower part of the cylinder body 11 through the control valve 21, at the moment, the Z cavity 113 is communicated with the P cavity 19, the Z cavity 113 is changed into high-pressure oil, and the piston 12 and the buffer sleeve 13 are pushed to move upwards by utilizing the difference of the upper area and the lower area of the piston 12, so that the closing operation of the hydraulic operating mechanism is realized.
During the switching-on operation process, when the hydraulic device working cylinder is started, before the buffer sleeve 13 leaves the plug 14, oil can enter the groove 144 through the central hole, the oil in the groove 144 has a pushing effect on the end face, close to the plug 14, of the buffer sleeve 13, the pushing force of the oil on the buffer sleeve 13 is increased, the starting force of the hydraulic device working cylinder is increased, and the starting speed of the hydraulic device working cylinder is increased. In addition, when the cushion sleeve 13 moves by the stroke of L2 and the piston 12 does not finish the stroke of L1, oil can enter the piston cavity 112 from the oil passing hole 15 and the oil passing groove 16 of the cushion sleeve 13 and a gap between the piston 12 and an inner hole of the cushion sleeve 13, and compared with the prior art, the oil passing groove 16 is designed to increase the oil supply amount to the piston cavity 112; the oil groove 17 and the inner hole of the buffer sleeve 13 on the buffer sleeve 13 are in a communicated state, oil in the Z cavity 113 can enter the oil groove 17 through the inner hole of the buffer sleeve 13, the acting area of the oil on the piston 12 during starting is increased, and the starting speed of the working cylinder of the hydraulic device is further improved. The measures increase the flow area and the oil action area during closing, increase the starting force during closing, solve the creeping phenomenon of the working cylinder of the hydraulic operating mechanism and improve the working reliability and stability of the hydraulic operating mechanism.
When the hydraulic operating mechanism is in the switching-on position, the Z cavity 113 is communicated with the P cavity 19 through the control valve 21, high-pressure oil is used, and switching-off operation can be carried out. After the control valve 21 receives a brake opening command, the valve core of the control valve 21 is switched, the Z cavity 113 is communicated with the T cavity 20 through the control valve 21 and leads to the oil tank 22, at the moment, the Z cavity 113 is changed into low-pressure oil, and the piston moves downwards under the pushing of the upper high-pressure oil to realize the brake opening operation of the hydraulic operating mechanism.
At the final stage of opening, the buffer shaft of the piston 12 is inserted into the inner hole of the buffer sleeve 13, the oil pushes the piston 12 and the buffer sleeve 13 to move towards the direction close to the plug 14, then the buffer sleeve 13 is blocked by the blocking end face 143 of the plug 14, at the moment, the oil passing groove 16 and the oil passing hole 15 are blocked by the blocking end face 143 of the plug 14, and the oil can only flow out from the gap between the piston 12 and the inner hole of the buffer sleeve 13, so that the oil resistance is increased, the moving speed of the piston 12 is reduced, and the piston 12 is buffered.
In the embodiment, four grooves 144 are axially arranged along the plug 14 of the hydraulic device working cylinder, and the four grooves 144 are uniformly distributed along the circumferential direction of the plug 14, in other embodiments, the number of the grooves on the plug can be set according to needs, and in order to ensure the structural strength of the plug, preferably, the grooves are three, five or six; of course, more than six can be provided; the four grooves can also be symmetrically arranged along a certain diameter of the plug, namely, the diameter of the plug is taken as a symmetry axis, the four grooves are symmetrically arranged at two sides of the symmetry axis, and the distance between two adjacent grooves at different sides of the symmetry axis is not equal to the distance between two adjacent grooves at the same side of the symmetry axis; of course, the distance between two adjacent grooves in the four grooves can also be set to be the same or different according to requirements.
In this embodiment, the radially outer end of the groove 144 is located on the inner side of the oil passing hole 15 in the radial direction of the plug 14, in other embodiments, the radially outer end of the groove may be located on the outer side of the oil passing hole in the radial direction of the plug of the hydraulic device working cylinder, at this time, the buffer sleeve is assembled in the piston cavity in a rotation-stopping manner, and the groove and the oil passing hole on the buffer sleeve are all arranged in a staggered manner in the radial direction of the plug, so as to prevent the groove from being communicated with the oil passing groove or the oil passing hole when the buffer sleeve is in. Specifically, a guide block can be arranged on the buffer sleeve, a guide groove extending along the axial direction of the buffer sleeve is arranged on the cavity wall of the piston cavity, and the guide block is assembled in the guide groove in a sliding mode to achieve rotation stopping assembly of the buffer sleeve in the piston cavity.
The groove 144 in this embodiment extends along the radial direction of the plug 14, and in other embodiments, an annular groove may be provided on the stop end surface of the plug, and a channel communicating the annular groove and the central hole is provided on the stop end surface, so that oil in the central hole enters the annular groove through the channel; the groove can also be a broken line groove or an arc groove.
In a second specific embodiment of the hydraulic device cylinder of the present invention, the hydraulic device cylinder in this embodiment is different from the hydraulic device cylinder in the first embodiment only in the structure of the plug, as shown in fig. 9 and 10, no groove is provided on the plug in this embodiment, the central hole 1411 of the plug has a tapered hole section 146, the aperture of the tapered hole section 146 gradually increases along the direction from the plug to the stopping step 111, that is, the size of the tapered hole section 146 gradually increases along the direction from the bottom of the central hole 1411 to the aperture, the tapered hole section 146 forms a diameter-enlarged section of the central hole 1411, the opening at one end of the central hole 1411 close to the piston 12 is formed by the tapered hole section 146, and the inner diameter at the opening of the tapered hole section 146 is greater than the aperture at one end of the inner hole of the buffer sleeve 13 close to the plug.
In addition, the plug is further provided with a communication channel 1441, one end of the communication channel 1441 is opened on the stop end face 1431, and the other end of the communication channel 1441 is opened on the hole wall of the through hole 142 of the plug so as to be communicated with the Z cavity 113 of the hydraulic device working cylinder. It should be noted that, in order to prevent the communication channel 1441 from being communicated with the oil passing hole 15 or the oil passing groove 16 when the buffer sleeve 13 is in stop fit with the plug, so as to affect the buffering effect of the buffer sleeve 13, the oil passing hole 15 and the communication channel 1441 on the buffer sleeve 13 are arranged in a staggered manner in the circumferential direction of the plug, the oil passing groove 16 and the communication channel 1441 of the buffer sleeve 13 are arranged in a staggered manner in the radial direction of the plug, and the buffer sleeve 13 is assembled in the piston cavity 112 in a rotation-stopped manner, specifically, a guide groove extending in the axial direction may be provided on the buffer sleeve 13, and a guide block is provided in the piston cavity 112, and the guide groove and the guide block are in guide sliding fit to realize the rotation-stopped of the buffer sleeve.
In the closing operation process, when the hydraulic device working cylinder is started, oil can enter the communicating passage 1441 through the central hole 1411, the oil at the opening of the stop end face 1431 in the communicating passage 1441 and the oil at the diameter expansion section all have a pushing effect on the end face, close to the plug, of the buffer sleeve 13.
The central hole 1411 of the plug in the embodiment has a taper hole section 146, and the taper hole section 146 forms an expanded section and forms a diameter expanded section of the central hole 1411 of the plug; in other embodiments, the tapered hole section may be replaced by an arc-shaped hole of which the size gradually increases along the direction from the bottom of the central hole to the orifice, and the arc-shaped hole forms the flaring section; in other embodiments, the central hole of the plug may also include a small-diameter section and a large-diameter section, the small-diameter section is disposed away from the buffer sleeve, the large-diameter section is disposed close to the buffer sleeve, and the large-diameter section forms the diameter expansion section.
In other embodiments, the communication channel 1441 may include a radial channel section extending along the radial direction of the plug and an axial channel section extending along the axial direction of the plug, the radial channel section is communicated with the axial channel section, an opening at one end of the radial channel section is disposed on the end face of the stopper, and an opening at one end of the axial channel section is disposed on the hole wall of the central hole to communicate with the Z cavity of the hydraulic device cylinder.
In a third specific embodiment of the hydraulic device cylinder of the present invention, the hydraulic device cylinder in this embodiment is different from the hydraulic device cylinder in the first embodiment only in the structure of the plug, as shown in fig. 11 and 12, the plug in this embodiment is not provided with a groove, the plug is provided with four communication grooves 1442, the four communication grooves 1442 are uniformly distributed along the circumferential direction of the plug, the communication grooves 1442 form communication channels in this embodiment, the communication grooves 1442 and the wall of the piston cavity 112 enclose a flow channel through which oil flows, one end of each communication groove 1442 is opened on the stop end face 1432, and the other end of each communication groove 1442 is opened on the outer wall face of the plug and the wall of the through hole 1421 to communicate with the Z cavity 113 of the hydraulic device cylinder. It should be noted that four through holes 1421 are also disposed along the circumferential direction of the plug in the present embodiment to communicate with the four communication grooves 1442, respectively, wherein one through hole 1421 corresponds to an opening of the Z-cavity 113 of the cylinder 11 near the axial direction of the cylinder 11.
In this embodiment, the bottom of the communicating groove 1442 is located outside the oil passing hole 15 in the radial direction of the plug, and in order to prevent the communicating groove 1442 from communicating with the oil passing groove when the buffer sleeve 13 is matched with the plug stop, and thus the buffering effect of the buffer sleeve 13 is affected, the oil passing groove and the communicating groove on the buffer sleeve 13 are arranged in a staggered manner in the circumferential direction of the plug, and the buffer sleeve 13 is assembled in the piston cavity in a rotation stopping manner.
In the closing operation process, when the hydraulic device working cylinder is started, oil can enter the communicating groove 1442 through the central hole 1412, the oil in the opening of the stop end face 1432 in the communicating groove 1442 has a pushing effect on the end face, close to the plug, of the buffer sleeve 13, and compared with the prior art, the oil has the advantages that the pushing force of the oil on the buffer sleeve 13 is increased, the starting force of the hydraulic device working cylinder is increased, and the starting speed of the hydraulic device working cylinder is increased.
In this embodiment, the cross section of the communication groove 1442 on a plane parallel to the radial direction of the plug is rectangular, and in other embodiments, the cross section of the communication groove on a plane parallel to the radial direction of the plug may be V-shaped, trapezoidal, or other shapes.
The communication groove 1442 in this embodiment is a linear groove extending in the axial direction of the plug, and in other embodiments, the communication groove may also be a polygonal line groove or an arc groove extending in the axial direction.
In a fourth specific embodiment of the hydraulic device cylinder of the present invention, the hydraulic device cylinder in this embodiment is different from the hydraulic device cylinder in the first embodiment only in the structure of the plug, as shown in fig. 13 and 14, no groove is provided on the plug in this embodiment, four communication channels 1443 are uniformly distributed on the plug along the circumferential direction, an opening at one end of each communication channel 1443 is provided on the stop end surface 1433, an opening at the other end is provided on the hole wall of the through hole 1422 of the plug, four through holes 1422 are uniformly distributed along the circumferential direction of the plug in this embodiment, the four through holes 1422 are respectively provided in one-to-one correspondence with the four communication channels 1443, and one of the through holes 1422 corresponds to the opening of the Z cavity of the cylinder body near the axial direction of the cylinder body so as to communicate with the Z cavity of the hydraulic device cylinder.
In this embodiment, the communication channel 1443 is located on the inner side of the bottom of the oil groove 16 in the radial direction of the plug, and in order to prevent the communication channel 1443 from being communicated with the oil passing hole 15 when the buffer sleeve 13 is in stop fit with the plug, and thus the buffering effect of the buffer sleeve 13 is affected, the oil passing hole 15 and the communication channel 1443 on the buffer sleeve 13 are arranged in a staggered manner in the radial direction of the plug, and the buffer sleeve 13 is assembled in the piston cavity 112 in a rotation stopping manner, specifically, a guide groove extending in the axial direction may be provided on the buffer sleeve 13, and a guide block is provided in the piston cavity 112, and the guide groove and the guide block are in guide sliding fit to realize rotation stopping of the buffer sleeve 13.
In the closing operation process, when the hydraulic device working cylinder is started, oil can enter the communicating passage 1443 through the through hole 1422, and the oil at the opening of the stop end face 1433 in the communicating passage 1443 has a pushing effect on the end face, close to the plug, of the buffer sleeve 13.
In other embodiments, the communication channel and the oil passing groove are arranged in a staggered manner in the circumferential direction of the plug, so that the communication channel can be expanded to a certain size along the radial direction of the plug; the oil passing holes in the buffer sleeves and the communication channels are arranged in a staggered mode in the circumferential direction of the plugs, so that the communication channels can be radially expanded by a certain size along the plugs.
In other embodiments, the number and the positions of the communication channels may be set as required, preferably, three, five, or six communication channels are set, and certainly, more than six communication channels may also be set as required.
In the specific embodiment of the plug of the hydraulic device working cylinder, the structure of the plug of the hydraulic device working cylinder in the embodiment is the same as that of the plug in the specific embodiment of the hydraulic device working cylinder, and the detailed description is omitted.
Claims (7)
1. The hydraulic device working cylinder comprises a cylinder body and a piston;
a piston cavity is arranged in the cylinder body, the piston is movably assembled in the piston cavity along the axial direction of the cylinder body in a guiding manner, a stopping step is arranged on the inner wall of one end of the piston cavity, which corresponds to the buffer stroke tail end of the piston, and a plug is arranged at the end head of the end;
the buffer sleeve is movably arranged between the stop step and the plug along the axial direction of the cylinder body, an inner hole for inserting the buffer shaft of the piston is formed in the buffer sleeve, and an oil passing hole which penetrates through the buffer sleeve along the axial direction is further formed in the buffer sleeve;
it is characterized in that the utility model is characterized in that,
the plug comprises a central hole, the central hole is used for inserting a buffer shaft on a piston of the hydraulic device working cylinder, and the plug is also provided with a stop end face which is used for blocking an oil passing hole in the buffer sleeve when the plug is matched with the stop of the buffer sleeve;
a groove is formed in the stop end face of the plug and communicated with the central hole; alternatively, the first and second electrodes may be,
the plug is provided with a communicating channel, one end opening of the communicating channel is arranged on the end face of the stop, and the other end opening of the communicating channel is arranged on the corresponding wall surface of the plug so as to be communicated with the Z cavity of the hydraulic device working cylinder;
when the closing operation is started, the buffer sleeve is pressed on the end face of the plug by the piston.
2. The hydraulic apparatus as recited in claim 1 wherein there are more than two of the recesses circumferentially around the bulkhead of the hydraulic apparatus cylinder.
3. A hydraulic device cylinder as claimed in claim 2, wherein the recesses are evenly spaced around the circumference of the end cap of the hydraulic device cylinder.
4. A hydraulic device cylinder according to any one of claims 1-3, wherein the central bore has an enlarged diameter section, and the opening of the central bore for the end adjacent the piston is formed by the enlarged diameter section.
5. The hydraulic apparatus as in claim 4, wherein the enlarged diameter section comprises a flared section of increasing size in a direction from the bottom of the central bore to the port.
6. A hydraulic device cylinder according to claim 5, wherein the flared section is a tapered bore section.
7. A hydraulic working cylinder according to any one of claims 1-3 wherein the radially outer end of the recess is located radially outside the oil through bore in the plug, and the damping sleeve is fitted in the piston chamber in a rotationally fixed manner.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910346143.0A CN110159610B (en) | 2019-04-26 | 2019-04-26 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910346143.0A CN110159610B (en) | 2019-04-26 | 2019-04-26 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
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| CN110159610A CN110159610A (en) | 2019-08-23 |
| CN110159610B true CN110159610B (en) | 2020-11-06 |
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| CN201910346143.0A Active CN110159610B (en) | 2019-04-26 | 2019-04-26 | Plug of hydraulic device working cylinder and hydraulic device working cylinder |
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| CN206320105U (en) * | 2016-11-22 | 2017-07-11 | 江苏恒立液压股份有限公司 | Small-sized cylinder buffer device |
| CN207349201U (en) * | 2017-10-30 | 2018-05-11 | 厦门汉莱德机械有限公司 | A kind of new-type cylinder buffer mechanism |
| CN108317124A (en) * | 2018-03-11 | 2018-07-24 | 华东交通大学 | A kind of novel high-voltage circuit-breaker hydraulic working cylinder with combined buffer plunger |
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2019
- 2019-04-26 CN CN201910346143.0A patent/CN110159610B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101963168A (en) * | 2010-10-20 | 2011-02-02 | 小冶精通（天津）液压机械有限公司 | Hydro-cylinder for performing buffering by using floating one-way valve sheet |
| CN102900723A (en) * | 2012-11-16 | 2013-01-30 | 江阴市洪腾机械有限公司 | Front buffering type hydraulic cylinder |
| CN203146480U (en) * | 2013-01-31 | 2013-08-21 | 无锡西姆莱斯石油专用管制造有限公司 | Rod-less cavity side buffer structure for hydraulic cylinder |
| CN203500175U (en) * | 2013-09-30 | 2014-03-26 | 湖北江山液压科技有限公司 | Constant throttling buffering device of hydraulic cylinder |
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| CN207349201U (en) * | 2017-10-30 | 2018-05-11 | 厦门汉莱德机械有限公司 | A kind of new-type cylinder buffer mechanism |
| CN108317124A (en) * | 2018-03-11 | 2018-07-24 | 华东交通大学 | A kind of novel high-voltage circuit-breaker hydraulic working cylinder with combined buffer plunger |
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| Publication number | Publication date |
|---|---|
| CN110159610A (en) | 2019-08-23 |
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