CN202833388U - Load balancing valve and hydraulic load-bearing system - Google Patents
Load balancing valve and hydraulic load-bearing system Download PDFInfo
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- CN202833388U CN202833388U CN 201220526918 CN201220526918U CN202833388U CN 202833388 U CN202833388 U CN 202833388U CN 201220526918 CN201220526918 CN 201220526918 CN 201220526918 U CN201220526918 U CN 201220526918U CN 202833388 U CN202833388 U CN 202833388U
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Abstract
The utility model provides a load balancing valve and a hydraulic load-bearing system. The load balancing valve comprises a valve body, a balance valve core, a one-way valve assembly, and a damping unit, wherein the balance valve core comprises a first end and a second end, the one-way valve assembly is sleeved on the balance valve core, an oil cavity connected with a second working oil opening is formed between the one-way valve assembly and the first end of the balance valve core, the second end of the balance valve core comprises a sealing face matched with the one-way valve assembly, the sectional area of a matched face of the first end is smaller than the sectional area of a sealing line on a sealing face of the second end, the damping unit comprises at least two damps and is arranged between a control oil opening and the first end of the balance valve core, and an outlet of the damping unit is connected with a first working oil opening. After adjustments by the first damp and the second damp, a control cavity is more stable in pressure, and therefore opening stability of the load balancing valve is improved.
Description
Technical field
The utility model relates to a kind of valve, more specifically, relates to a kind of load and keeps equilibrium valve and hydraulic pressure load bearing system.
Background technique
Development along with hydraulics, load control system has been widely used in the hydraulic pressure load bearing system of the hydraulic machinery equipment such as engineering machinery, building machinery, wherein, it is the crucial hydraulic element of load control system and hydraulic pressure load bearing system that load keeps equilibrium valve, and load keeps the good and bad ride quality that directly affects main frame of equilibrium valve performance.
At present, keep sealing, self-locking performance, stationarity and the polyfunctional requirement of equilibrium valve more and more higher to load.If it is too fast that load keeps equilibrium valve to open, will make the rodless cavity instantaneous loss of pressure of the load-bearing oil cylinder in the hydraulic pressure load bearing system, the load-bearing oil cylinder falls; If it is too fast that load keeps equilibrium valve to close, will make the rodless cavity instantaneous pressure of load-bearing oil cylinder, produce and impact, will make like this main frame produce vibration, bring certain danger for the smooth working of complete machine.
Fig. 1 shows the structural representation that load of the prior art keeps equilibrium valve.As shown in Figure 1, load of the prior art keeps equilibrium valve to comprise: valve body 10, balance valve core 20, check valve assembly 30, the first damping 60 and pressure regulation assembly 50.Wherein, be provided with control port P, the first actuator port A and the second actuator port (not shown) on the valve body 10.Balance valve core 20 is arranged in the valve body 10, and balance valve core 20 comprises first end 21 and the second end 22, and the area of first end 21 is less than the area of the second end 22.Check valve assembly 30 is set on the balance valve core 20, forms the oil pocket 40 that is connected with the second actuator port B between the first end 21 of check valve assembly 30 and balance valve core 20.The first damping 60 is arranged between the first end 21 of control port P and balance valve core 20, formation control chamber 80 between balance valve core 20 and the first damping 60.Pressure regulation assembly 50 is connected and is arranged on a side of the second end 22 of balance valve core 20 with valve body 10; The second end 22 of balance valve core 20 is arranged in the pressure regulation assembly 50 actively; The inside of pressure regulation assembly 50 is communicated with the first actuator port A.
Wherein, check valve assembly 30 comprises the first elastic element 31 and unidirectional valve pocket 32, unidirectional valve pocket 32 under the effect of the first elastic element 31 with the sealing surface contact of the second end 22 of balance valve core 20 or separate.Pressure regulation assembly 50 comprises connecting sleeve 51 and is arranged on the second elastic element 52 of connecting sleeve 51 inside.
As shown in Figure 1, when hydraulic oil during by the first actuator port A oil-feed, promote unidirectional valve pocket 32 to left movement, separate thereby make between the sealing surface of unidirectional valve pocket 32 and the second end 22 of balance valve core 20, so, hydraulic oil injects oil pocket 40 by the first actuator port A, and is further entered the rodless cavity of load-bearing oil cylinder by the second actuator port, and weight is lifted.When weight arrived specified position, the hydraulic oil in the oil pocket 40 promoted unidirectional valve pocket 32 and moves right, and made the sealing surface close contact of the second end 22 of unidirectional valve pocket 32 and balance valve core 20, and at this moment, oil pocket 40 is in locking states.When hydraulic oil enters control chamber 80 by control port P and the first damping 60, promote balance valve core 20 and move right, until being connected cover 51, unidirectional valve pocket 32 blocks.Along with balance valve core 20 being moved further to the right, the sealing surface of the second end 22 of balance valve core 20 separates with unidirectional valve pocket 32, so the balance valve port is opened.At this moment, come the hydraulic oil of the rodless cavity of self-supporting oil cylinder to flow to the first actuator port A through oil pocket 40, weight descends.
Because the area of the first end 21 of balance valve core 20 is less than the area of the second end 22, when control chamber 80 interior during without pressure oil, after pressure in the oil pocket 40 increases to a certain value, balance valve core 20 be subject to the right make a concerted effort to surpass the setting pressure of the second elastic element 52 time, balance valve core 20 moves further to the right, so safety valve is opened, the pressure oil in the oil pocket 40 is discharged by the first head piece A.After pressure was released to safety pressure, the second elastic element 52 promoted balance valve core 20 to left movement, and contacts with unidirectional valve pocket 32, to close the balance valve port.
But the pressure amplitude of the pressure follow control port P of control chamber 80 of the prior art is larger, and this can cause the pressure surge of control chamber 80 large, makes load keep the unlatching less stable of equilibrium valve.In addition, because the first damping 60 is fixedly dampings, therefore, and its adjusting and change very inconveniently, and the matching range of pilot pressure and valve port opening is narrower.At last, because the main aperture of valve body 10 (hole of the first end 21 of the first damping 60 and balance valve core 20 namely is installed) has step, therefore, main aperture is difficult to be cleaned, and has strengthened difficulty of processing.
The model utility content
The utility model aims to provide a kind of load and keeps equilibrium valve and hydraulic pressure load bearing system, to solve the problem of opening less stable in the prior art.
For solving the problems of the technologies described above, according to first aspect of the present utility model, provide a kind of load to keep equilibrium valve, comprising: valve body is provided with control port, the first actuator port and the second actuator port on the valve body; Balance valve core, balance valve core are arranged in the valve pocket of valve body, and balance valve core comprises first end and the second end; First end comprises the fitting surface that matches with the valve pocket of valve body; Check valve assembly, check valve assembly are set on the balance valve core, form the oil pocket that is connected with the second actuator port between the first end of check valve assembly and balance valve core; The second end of balance valve core comprises the sealing surface that matches with check valve assembly, and the sectional area at the fitting surface place of first end is less than the sectional area at the potted line place on the sealing surface of the second end; Damping unit, damping unit comprise at least two dampings, and damping unit is arranged between the first end of control port and balance valve core, and the outlet of damping unit is connected with the first actuator port; Pressure regulation assembly, pressure regulation assembly are connected and are arranged on a side of the second end of balance valve core with valve body; The second end of balance valve core is arranged in the installation cavity of pressure regulation assembly actively; The installation cavity of pressure regulation assembly is communicated with the first actuator port.
Further, damping unit comprises the first damping and the second damping between the first end that is successively set on control port and balance valve core, and the relative valve body of the first damping arranges regularly, and the relative valve body of the second damping arranges actively.
Further, the first damping is adjustable damping or fixedly damping.
Further, the first damping is the screw thread damping.
Further, the second damping is one-way damper valve, from the pressure oil of control port successively through flowing into the first actuator port behind the first damping and the one-way damper valve.
Further, valve body comprises the main aperture with single diameter, and the first end of balance valve core and the second damping are positioned at main aperture.
Further, be provided with the feedback oil duct on the balance valve core, the outlet of damping unit is connected with the first actuator port by the feedback oil duct.
Further, check valve assembly comprises the first elastic element and unidirectional valve pocket, and one-way valve is enclosed within the effect of the first elastic element with the second end in contact of balance valve core or separates.
Further, the pressure regulation assembly comprises connecting sleeve and the second elastic element, and installation cavity is opened in connecting sleeve, and the second elastic element is arranged in the installation cavity.
Further, the second end of balance valve core comprises the conical surface or sphere.
According to second aspect of the present utility model, a kind of hydraulic pressure load bearing system is provided, comprise that load-bearing oil cylinder, load keep equilibrium valve and selector valve, it is that above-mentioned load keeps equilibrium valve that this load keeps equilibrium valve, the rod chamber of load-bearing oil cylinder is connected with the first actuator port of selector valve, the rodless cavity of load-bearing oil cylinder keeps the second actuator port of equilibrium valve to be connected with load, load keeps the first actuator port of equilibrium valve to be connected with the second actuator port of selector valve, and rod chamber keeps the control port of equilibrium valve to be connected with load.
Through the adjusting of the first damping and the second damping, the pressure of control chamber is more stable, keeps the unlatching of equilibrium valve stable thereby improved load.Simultaneously, under identical valve port opening, broadening the regulation range of control port, also more accurate to the control of the aperture of valve port, can realize the accurate control to flow.
Description of drawings
The accompanying drawing that consists of the application's a part is used to provide further understanding of the present utility model, and illustrative examples of the present utility model and explanation thereof are used for explaining the utility model, do not consist of improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 has schematically shown the structural representation that load of the prior art keeps equilibrium valve;
Fig. 2 has schematically shown the structural representation of a kind of load maintenance equilibrium valve in the utility model;
Fig. 3 has schematically shown the structural representation of the another kind of load maintenance equilibrium valve in the utility model;
Fig. 4 has schematically shown the schematic diagram of the load maintenance equilibrium valve in the utility model;
Fig. 5 has schematically shown the schematic diagram of the hydraulic pressure load bearing system of having used the load maintenance equilibrium valve in the utility model;
Fig. 6 has schematically shown the structural representation of the balance valve core among the embodiment;
Fig. 7 has schematically shown the structural representation of the balance valve core among another embodiment; And
Fig. 8 has schematically shown the structural representation of unidirectional valve pocket.
Reference character among the figure: 10, valve body; 20, balance valve core; 21, first end; 22, the second end; 23, feedback oil duct; 24, bias current dish; 25, the conical surface; 26, sphere; 30, check valve assembly; 31, the first elastic element; 32, unidirectional valve pocket; 33, spring seat; 40, oil pocket; 50, pressure regulation assembly; 51, connecting sleeve; 52, the second elastic element; 53, spring seat; 54, locking nut; 60, the first damping; 61, damping bolt; 62, damping device; 70, the second damping; 71, damping hole; 80, control chamber; 90, filter; 100, nut; 101, screw plug; 110, selector valve; 120, load-bearing oil cylinder; 121, rod chamber; 122, rodless cavity; 130, weight; 511, oil duct; P, control port; A, the first actuator port; B, the second actuator port; M, measurement hydraulic fluid port; P_in, actuator port; T, return opening.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
As first aspect of the present utility model, provide a kind of load to keep equilibrium valve.To shown in Figure 4, the load in the utility model keeps equilibrium valve to comprise: valve body 10, balance valve core 20, check valve assembly 30, damping unit and pressure regulation assembly 50 such as Fig. 2.
Wherein, be provided with control port P, the first actuator port A and the second actuator port B on the valve body 10.Balance valve core 20 is arranged in the valve pocket of valve body 10, and balance valve core 20 comprises first end 21 and the second end 22, and first end 21 comprises the fitting surface that matches with the valve pocket of valve body 10.Check valve assembly 30 is set on the balance valve core 20, forms the oil pocket 40 that is connected with the second actuator port B between the first end 21 of check valve assembly 30 and balance valve core 20.The second end 22 of balance valve core 20 comprises the sealing surface that matches with check valve assembly 30, and the sectional area at the fitting surface place of first end 21 is less than the sectional area at the potted line place on the sealing surface of the second end 22.
Damping unit comprises at least two dampings, and damping unit is arranged between the first end 21 of control port P and balance valve core 20, and the outlet of damping unit is connected with the first actuator port A.Pressure regulation assembly 50 is connected and is arranged on a side of the second end 22 of balance valve core 20 with valve body 10; The second end 22 of balance valve core 20 is arranged in the installation cavity of pressure regulation assembly 50 actively; The installation cavity of pressure regulation assembly 50 is communicated with the first actuator port A.
Preferably, check valve assembly 30 comprises the first elastic element 31 and unidirectional valve pocket 32, unidirectional valve pocket 32 under the effect of the first elastic element 31 with the sealing surface contact of the second end 22 of balance valve core 20 or separate.Preferably, check valve assembly 30 comprises that also spring seat 33, the first elastic elements 31 are arranged between spring seat 33 and the unidirectional valve pocket 32, in order to provide to the right elastic force to unidirectional valve pocket 32.Preferably, unidirectional valve pocket 32 also comprises the sealing wedge angle, the sealing surface contact at sealing wedge angle and the second end 22 places of balance valve core 20 or separate, with realize (during the safety valve function) valve port open close.
Preferably, pressure regulation assembly 50 comprises connecting sleeve 51 and the second elastic element 52, and above-mentioned installation cavity is opened in connecting sleeve 51, the second elastic elements and is arranged in the installation cavity.Preferably, pressure regulation assembly 50 also comprises the spring seat 53 of the one or both ends that are arranged on the second elastic element 52.Preferably, be provided with oil duct 511 on the connecting sleeve 51, the installation cavity of connecting sleeve 51 is communicated with the first actuator port A by oil duct 511.Preferably, pressure regulation assembly 50 also comprises locking nut 54, can regulate the setting pressure of the second elastic element 52 by locking nut 54.
Below in conjunction with Fig. 2 to Fig. 5, keep the working procedure of equilibrium valve to describe in detail to the load in the utility model.
As shown in Figure 5, the piston rod of load-bearing oil cylinder 120 is connected with weight 130, the rod chamber 121 of load-bearing oil cylinder 120 is connected with selector valve 110, and its rodless cavity 122 keeps the second actuator port B of equilibrium valve to be connected with load, and load keeps the first actuator port A of equilibrium valve to be connected with selector valve 110.Simultaneously, rod chamber 121 keeps the control port P of equilibrium valve to be connected with load.
When selector valve 110 was in left station, pressure oil flowed into the first actuator port A that load keeps equilibrium valve by the actuator port P_in of selector valve 110, applied first active force left to the right side of the unidirectional valve pocket 32 of check valve assembly 30.Simultaneously, load (for example weight 130) acts on the induced pressure oil on the rodless cavity 122, be communicated with oil pocket 40 by the second actuator port B, left side to unidirectional valve pocket 32 applies second active force to the right, and the first elastic element 31 of check valve assembly applies the 3rd active force to the right to the right side of unidirectional valve pocket 32.Wherein, the first active force overcomes the effect of the second active force and the 3rd active force, promotes unidirectional valve pocket 32 to left movement.So the sealing wedge angle of the right-hand member of unidirectional valve pocket 32 separates with the sealing surface of the second end 22 of balance valve core 20.Like this, from the pressure oil of the first actuator port A through between the sealing surface of the sealing wedge angle of the right-hand member of unidirectional valve pocket 32 and the second end 22 of balance valve core 20, because the valve port inflow oil pocket 40 that above-mentioned detaching motion produces, and further flow into the rodless cavity 122 of load-bearing oil cylinder 120 through the second actuator port B, move upward thereby promote weight 130, keep the one-way function of equilibrium valve to realize load.At this moment, the fluid in the rod chamber 121 flows back to fuel tank through the oil return inlet T of selector valve 110.
When weight 130 rose to specified position, selector valve 110 switched to intermediate stations shown in Figure 5.At this moment, the first actuator port A decompression, the second active force and the 3rd active force still act on the left side of unidirectional valve pocket 32, thereby promoting unidirectional valve pocket 32 moves right, until contact with the sealing surface of the second end 22 of balance valve core 20, with the fluid in the rodless cavity 122 of sealed high pressure oil, pinning load-bearing oil cylinder 120, at this moment, weight 130 is locked in the position of appointment.The pressure oil that is applied to the power generation on the rodless cavity 122 by weight 130 is applied on the first end 21 and the second end 22 of balance valve core 20 by oil pocket 40.Because therefore the area of first end 21, has also produced second active force to the right less than the area of the second end 22 on balance valve core 20.Since overload or weight 130 because in the situation that causes the pressure rise in the oil pocket 40 of external force, the second active force on acting on balance valve core 20 is during greater than the preset pressure of the second elastic element 52 of pressure regulation assembly 50, balance valve core 20 moves right, so that unidirectional valve pocket 32 separates with the sealing surface of the second end 22 of balance valve core 20, so the pressure oil in the oil pocket 40 flows to the first actuator port A by the valve port that produces owing to the two separation, with release pressure, realize that load keeps the safety valve function of equilibrium valve.After being discharged into safety pressure, the second elastic element 52 promotes balance valve core 20 left, and it is contacted with the sealing wedge angle of unidirectional valve pocket 32, with close port.Like this, just, can between oil pocket 40 and rodless cavity 122, set up the pressure in the safety range.
When selector valve 110 switched to right working position, high pressure oil entered the rod chamber 121 of load-bearing oil cylinder 120, also was fed back to the control port P that load keeps equilibrium valve simultaneously.So, the pressure oil that feeds back to control port P enters the first damping 60 through the oil duct on filter 90 and the screw plug 101, and be applied on the left side of the second damping 70 by the first damping 60, wherein a part of pressure oil flows to the first actuator port A by the damping hole 71 in the second damping 70.Along with the pressure in the rod chamber 121 that enters load-bearing oil cylinder 120 raises gradually, the pressure in the control chamber 80 also increases.Especially, control chamber 80 is arranged on the centre (also can be described as the middle output stage of the first damping 60 and the second damping 70) of the first damping 60 and the second damping 70.When the fluid in the control chamber 80 acts on pressure on the left side of the second damping 70 and increases to the pre set force that can overcome the second elastic element 52, promote the second damping 70, balance valve core 20 and unidirectional valve pocket 32 and move right together.When the right side of unidirectional valve pocket 32 with after the left side of the connecting sleeve 51 of pressure regulation assembly 50 contacts, just no longer move right.At this moment, the sealing wedge angle of unidirectional valve pocket 32 just separates with the sealing surface of the second end 22 of balance valve core 20, thereby valve port is opened.Oil pocket 40 flows to the first actuator port A to the oil stream of the rodless cavity 122 of load-bearing oil cylinder 120 through the above-mentioned valve port that is opened, so weight falls.In this process, load keeps the openings of sizes of equilibrium valve relevant with the size of the pressure of control chamber 80.Through the adjusting of the first damping 60 and the second damping 70, the pressure of control chamber 80 is more stable, keeps the unlatching of equilibrium valve stable thereby improved load.Simultaneously, under identical valve port opening, broadening the regulation range of control port P, also more accurate to the control of the aperture of valve port, can realize the accurate control to flow.
Preferably, please refer to Fig. 2 and Fig. 3, damping unit comprises that the first damping 60 and the second damping 70, the first dampings 60 relative valve bodies 10 between the first end 21 that is successively set on control port P and balance valve core 20 arrange regularly, and the second damping 70 relative valve bodies 10 arrange actively.Preferably, the first damping 60 is adjustable damping or fixedly damping.For example, in the embodiment shown in Figure 2, the first damping 60 is screw thread dampings, with convenient adjusting and maintenance to damping.In the embodiment shown in fig. 3, the first damping 60 is fixedly dampings.In addition, preferably, the second damping 70 is one-way damper valves, from the pressure oil of control port P successively through flowing into the first actuator port A behind the first damping 60 and the one-way damper valve.The mode that adopts adjustable damping to combine with fixing damping can adapt to the requirement of different operating modes, makes to the utlity model has wider application area.
In the embodiment shown in Figure 2, the first damping 60 comprises damping bolt 61 and the damping device 62 that is connected with damping bolt 61.Wherein, screw plug 101 comprises the damping device 62 that is formed on the one end, and screw plug 101 comprises along the screw of the axial setting of described screw plug 101, and wherein, the part of the damping device 62 of this screw plug 101 also is provided with screw.Damping bolt 61 passes the screw in the screw plug 101, and its free end is arranged on the outside of screw plug 101 highlightedly, is provided with nut 100 at the free end of damping bolt 61, damping bolt 61 can be fixed up by nut 100.By damping adjusting bolt 61 length, the size that can regulate the first damping 60.From the pressure oil of control port P, the Screw Thread Fit Clearance between overdamping bolt 61 and damping device 62 and ramp metering chamber 80.
Preferably, valve body 10 comprises the main aperture with single diameter, and the first end 21 of balance valve core 20 and the second damping 70 are positioned at main aperture.Owing to not having step in the main aperture, therefore be easy to be cleaned, reduced the difficulty of processing, join to integral installation and bring great convenience.
Preferably, be provided with feedback oil duct 23 on the balance valve core 20, the outlet of damping unit (the particularly outlet of the second damping 70) is connected with the first actuator port A by feedback oil duct 23.Especially, feedback oil duct 23 is axially extended to the direction of the second end 22 by the first end 21 of balance valve core 20 along balance valve core 20, and then along the radially extension of balance valve core 20, thereby be connected with the first actuator port A.
Please refer to Fig. 6 and Fig. 7, preferably, the second end 22 of balance valve core 20 comprises conical surface 25(such as Fig. 6) or sphere 26(such as Fig. 7), that is to say that above-mentioned sealing surface can be the conical surface 25 or sphere 26.Preferably, the end of balance valve core 20 also is provided with bias current dish 24, utilizes bias current dish 24 can change the flow direction of fluid, has further improved and has opened stability.
Especially, also be provided with measurement hydraulic fluid port M for detection of the pressure of control chamber 80 on the valve body 10.
As second aspect of the present utility model, please refer to Fig. 5, the hydraulic pressure load bearing system is provided, comprise that load-bearing oil cylinder 120, load keep equilibrium valve and selector valve 110, it is that above-mentioned load keeps equilibrium valve that this load keeps equilibrium valve, the rod chamber 121 of load-bearing oil cylinder 120 is connected with the first actuator port of selector valve 110, the rodless cavity 122 of load-bearing oil cylinder 120 keeps the second actuator port B of equilibrium valve to be connected with load, and load keeps the first actuator port A of equilibrium valve to be connected with the second actuator port of selector valve 110.Simultaneously, rod chamber 121 keeps the control port P of equilibrium valve to be connected with load.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (11)
1. a load keeps equilibrium valve, it is characterized in that, comprising:
Valve body (10) is provided with control port (P), the first actuator port (A) and the second actuator port (B) on the described valve body (10);
Balance valve core (20), described balance valve core (20) is arranged in the valve pocket of described valve body (10), and described balance valve core (20) comprises first end (21) and the second end (22); Described first end (21) comprises the fitting surface that matches with the valve pocket of described valve body (10);
Check valve assembly (30), described check valve assembly (30) is set on the described balance valve core (20), forms the oil pocket (40) that is connected with described the second actuator port (B) between the first end (21) of described check valve assembly (30) and described balance valve core (20); Second end (22) of described balance valve core (20) comprises the sealing surface that matches with described check valve assembly (30), and the sectional area at the described fitting surface place of described first end (21) is less than the sectional area at the potted line place on the described sealing surface of described the second end (22);
Damping unit, described damping unit comprises at least two dampings, and described damping unit is arranged between the first end (21) of described control port (P) and described balance valve core (20), and the outlet of described damping unit is connected with described the first actuator port (A);
Pressure regulation assembly (50), described pressure regulation assembly (50) are connected and are arranged on a side of second end (22) of described balance valve core (20) with described valve body (10); Second end (22) of described balance valve core (20) is arranged in the installation cavity of described pressure regulation assembly (50) actively; The installation cavity of described pressure regulation assembly (50) is communicated with described the first actuator port (A).
2. load according to claim 1 keeps equilibrium valve, it is characterized in that, described damping unit comprises the first damping (60) and the second damping (70) between the first end (21) that is successively set on described control port (P) and described balance valve core (20), the relatively described valve body of described the first damping (60) (10) arranges regularly, and the relatively described valve body of described the second damping (70) (10) arranges actively.
3. load according to claim 2 keeps equilibrium valve, it is characterized in that, described the first damping (60) is adjustable damping or fixedly damping.
4. load according to claim 2 keeps equilibrium valve, it is characterized in that, described the first damping (60) is the screw thread damping.
5. load according to claim 2 keeps equilibrium valve, it is characterized in that, described the second damping (70) is one-way damper valve, flows into described the first actuator port (A) after passing through successively described the first damping (60) and described one-way damper valve from the pressure oil of described control port (P).
6. load according to claim 2 keeps equilibrium valve, it is characterized in that, described valve body (10) comprises the main aperture with single diameter, and the first end (21) of described balance valve core (20) is positioned at described main aperture with described the second damping (70).
According to claim 1 in 6 each described load keep equilibrium valve, it is characterized in that, be provided with feedback oil duct (23) on the described balance valve core (20), the outlet of described damping unit is connected with described the first actuator port (A) by described feedback oil duct (23).
According to claim 1 in 6 each described load keep equilibrium valve, it is characterized in that, described check valve assembly (30) comprises the first elastic element (31) and unidirectional valve pocket (32), and described unidirectional valve pocket (32) contacts with second end (22) of described balance valve core (20) under the effect of described the first elastic element (31) or separates.
According to claim 1 in 6 each described load keep equilibrium valve, it is characterized in that, described pressure regulation assembly (50) comprises connecting sleeve (51) and the second elastic element (52), described installation cavity is opened in described connecting sleeve (51), and described the second elastic element is arranged in the described installation cavity.
According to claim 1 in 6 each described load keep equilibrium valve, it is characterized in that, second end (22) of described balance valve core (20) comprises the conical surface (25) or sphere (26).
11. hydraulic pressure load bearing system, comprise load-bearing oil cylinder (120), load keeps equilibrium valve and selector valve (110), it is characterized in that, it is that each described load keeps equilibrium valve in the claim 1 to 10 that described load keeps equilibrium valve, the rod chamber (121) of described load-bearing oil cylinder (120) is connected with the first actuator port of described selector valve (110), the rodless cavity (122) of described load-bearing oil cylinder (120) keeps second actuator port (B) of equilibrium valve to be connected with described load, described load keeps first actuator port (A) of equilibrium valve to be connected with the second actuator port of described selector valve (110), and described rod chamber (121) keeps the control port (P) of equilibrium valve to be connected with described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526918 CN202833388U (en) | 2012-10-15 | 2012-10-15 | Load balancing valve and hydraulic load-bearing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220526918 CN202833388U (en) | 2012-10-15 | 2012-10-15 | Load balancing valve and hydraulic load-bearing system |
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| Publication Number | Publication Date |
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| CN202833388U true CN202833388U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220526918 Expired - Fee Related CN202833388U (en) | 2012-10-15 | 2012-10-15 | Load balancing valve and hydraulic load-bearing system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982482A (en) * | 2014-05-30 | 2014-08-13 | 徐州重型机械有限公司 | Crane, telescopic arm control system of crane and balance valve |
| CN106949105A (en) * | 2017-04-07 | 2017-07-14 | 北京航空航天大学 | The two-way proportional balanced valve and its application system in a kind of over-running load speed limit loop |
| CN107091255A (en) * | 2017-01-07 | 2017-08-25 | 上海卡威机械技术有限公司 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
| CN108317116A (en) * | 2018-03-15 | 2018-07-24 | 无锡市思进工业自动化设备有限公司 | A kind of super-pressure balance carries valve and its method |
| CN113915188A (en) * | 2021-10-18 | 2022-01-11 | 山东泰丰智能控制股份有限公司 | Self-adaptive hydraulic control system |
-
2012
- 2012-10-15 CN CN 201220526918 patent/CN202833388U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103982482A (en) * | 2014-05-30 | 2014-08-13 | 徐州重型机械有限公司 | Crane, telescopic arm control system of crane and balance valve |
| CN107091255A (en) * | 2017-01-07 | 2017-08-25 | 上海卡威机械技术有限公司 | A kind of side valve type asymmetric cylinder bidirectional hydraulic balance system |
| CN106949105A (en) * | 2017-04-07 | 2017-07-14 | 北京航空航天大学 | The two-way proportional balanced valve and its application system in a kind of over-running load speed limit loop |
| CN106949105B (en) * | 2017-04-07 | 2018-12-28 | 北京航空航天大学 | The two-way proportional balanced valve and its application system in a kind of over-running load speed limit circuit |
| CN108317116A (en) * | 2018-03-15 | 2018-07-24 | 无锡市思进工业自动化设备有限公司 | A kind of super-pressure balance carries valve and its method |
| CN108317116B (en) * | 2018-03-15 | 2024-03-26 | 无锡市思进工业自动化设备有限公司 | Ultrahigh-pressure balance load balancing valve and method thereof |
| CN113915188A (en) * | 2021-10-18 | 2022-01-11 | 山东泰丰智能控制股份有限公司 | Self-adaptive hydraulic control system |
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