CN102400970B - Overflow throttling valve - Google Patents
Overflow throttling valve Download PDFInfo
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- CN102400970B CN102400970B CN201110392622.XA CN201110392622A CN102400970B CN 102400970 B CN102400970 B CN 102400970B CN 201110392622 A CN201110392622 A CN 201110392622A CN 102400970 B CN102400970 B CN 102400970B
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Abstract
The invention discloses an overflow throttling valve, which comprises a valve body (4), an overflow valve component and a throttling valve component, wherein both the overflow valve component and the throttling valve component are connected to the valve body (4); the overflow valve component and the throttling valve component share the same valve core (11) which is positioned in the valve body (4); three oil ports, namely an oil port P (8), an oil port T (10) and an oil port A (9), are formed on the bottom surface of the valve body (4); and the three oil ports are communicated with the valve core (11) respectively through channels in the valve body (4). By adopting the structure, as the overflow valve component and the throttling valve component share the same valve core, a part of one of the functional valves is saved, so that the number of the parts of the whole overflow throttling valve is small, the overflow throttling valve has a small volume and a compact structure.
Description
Technical field
The present invention relates to Hydraulic Field, is specifically a kind of overflow throttle valve of controlling flow for liquid control system.
Background technique
Overflow throttle valve, is a kind of pressure compensation type throttle valve, and it is formed in parallel by relief valve and throttle valve.The high pressure oil at import P1 place, a part is gone to actuator through throttle valve, and another part is through the flow-off of the relief valve case that deoils, and relief valve upper and lower end communicates with the pressure oil before and after throttle valve respectively.When outlet pressure increases, flow-off turns down, and spillage drag increases, and import P1 pressure increases thereupon, thereby the pressure reduction before and after throttle valve remains unchanged substantially; Vice versa.Therefore, the flow by valve is not subject to the impact of load substantially.Because it had both had the function of relief valve, the function again with throttle valve, these two kinds of functions are separate completing, so, the overflow throttle valve of prior art, its spill valve and throttle valve component are independent of each other, in other words, need two independently spool and related components, this certainly will cause overflow throttle valve complex structure, amount of parts more, thereby improve processing and the required precision of assembling, make cost of production higher.
Summary of the invention
Technical problem to be solved by this invention is, provides a kind of compact structure, volume is little, amount of parts is few, thereby is convenient to processing, assemble the overflow throttle valve easy, cost of production is lower.
For solving the problems of the technologies described above, overflow throttle valve provided by the invention, comprise valve body, spill valve and throttle valve component, described spill valve and throttle valve component are all connected on valve body, spool in described spill valve and the spool in throttle valve component are same spool, and described spool is positioned at valve body; The bottom surface of described valve body has three hydraulic fluid ports, is respectively P hydraulic fluid port, T hydraulic fluid port and A hydraulic fluid port, and these three hydraulic fluid ports respectively passage in valve body communicate with spool.
Described overflow throttle valve also comprises knob, driving lever, upper cover, valve pocket and spring; Wherein, the upper end of described driving lever is connected with knob by lock pin, and the lower end of driving lever is connected with spool, and the middle part of driving lever is rotatably connected in upper cover, and described top cap is connected on valve body; Described valve pocket close-fitting is in valve body, and the upper end of valve pocket is connected with upper cover by locating stud, and described spool is slidably connected and is rotatably connected in valve pocket; In described valve body, be provided with successively from top to bottom the first valve body oil groove, the second valve body oil groove and the 3rd valve body oil groove that all communicate with spool, these three valve body oil grooves are communicated with three hydraulic fluid ports of valve body bottom surface respectively.
As the first structure, described spring is positioned at the below of spool, and one end of spring and the bottom of spool push against, and the other end and valve body push against; The first described valve body oil groove is communicated with P hydraulic fluid port, and the second valve body oil groove is communicated with T hydraulic fluid port, and the 3rd valve body oil groove is communicated with A hydraulic fluid port.
On the outer wall of described valve pocket, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove, second valve collar-shaped groove and the 3rd valve pocket circular groove, the first described valve pocket circular groove communicates with the first valve body oil groove, second valve collar-shaped groove communicates with the second valve body oil groove, and the 3rd valve pocket circular groove communicates with the 3rd valve body oil groove; Valve pocket is provided with radially through hole of valve pocket at the first valve pocket circular groove place, and second valve collar-shaped groove place is provided with the first valve pocket rectangle through hole, at the 3rd valve pocket circular groove place, is provided with the second valve pocket rectangle through hole; Described spool from top to bottom has axial oilhole, on the outer wall of spool, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove, the second spool circular groove and the 3rd spool circular groove, the first described spool circular groove place is provided with radially through hole being communicated with axial oilhole of at least two the first uniform spools, and the second spool circular groove place is provided with at least two uniform second valve core diameters and is communicated with to through hole and with axial oilhole; Spool is provided with spool rectangle through hole in the lower end of axial oilhole; Along with spool sliding up and down in valve pocket, the second described spool circular groove and the first valve pocket rectangle through hole form and to be communicated with or the relief valve valve port of off state; Along with the rotation of spool in valve pocket, described spool rectangle through hole and the second valve pocket rectangle through hole form and to be communicated with or the throttle valve valve port of off state; Described spool lower end has the holding cavity of putting spring, and described holding cavity is communicated with the 3rd spool circular groove by the spool radial hole on spool, and the 3rd described spool circular groove is communicated with the 3rd valve pocket circular groove by the valve pocket radial hole on valve pocket.
As the second structure, described spring is positioned at the below of spool, and one end of spring and the bottom of spool push against, and the other end and valve body push against; The first described valve body oil groove is communicated with P hydraulic fluid port, and the second valve body oil groove is communicated with A hydraulic fluid port, and the 3rd valve body oil groove is communicated with T hydraulic fluid port.
On the outer wall of described valve pocket, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove, second valve collar-shaped groove and the 3rd valve pocket circular groove, the first described valve pocket circular groove communicates with the first valve body oil groove, second valve collar-shaped groove communicates with the second valve body oil groove, and the 3rd valve pocket circular groove communicates with the 3rd valve body oil groove, valve pocket is provided with radially through hole of valve pocket at the first valve pocket circular groove place, is provided with the second valve pocket rectangle through hole at second valve collar-shaped groove place, at the 3rd valve pocket circular groove place, is provided with the first valve pocket rectangle through hole, described spool from top to bottom has axial oilhole, on the outer wall of spool, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove, the second spool circular groove and the 3rd spool circular groove, the first described spool circular groove place is provided with radially through hole being communicated with axial oilhole of at least two the first uniform spools, the second spool circular groove place is provided with at least two uniform second valve core diameters to through hole, described second valve core diameter is positioned at the lower end of axial oilhole to through hole, the first described spool radially through hole is provided with the spool rectangle through hole corresponding with the position of the second valve pocket rectangle through hole with second valve core diameter to the spool middle part between through hole, along with spool sliding up and down in valve pocket, the 3rd described spool circular groove and the first valve pocket rectangle through hole form and to be communicated with or the relief valve valve port of off state, along with the rotation of spool in valve pocket, described spool rectangle through hole and the second valve pocket rectangle through hole form and to be communicated with or the throttle valve valve port of off state, described spool lower end has the holding cavity of putting spring, and described holding cavity is communicated with the 3rd spool circular groove by the spool radial hole on spool, and the 3rd described spool circular groove is communicated with second valve collar-shaped groove by the valve pocket oilhole on valve pocket.
As the further improvement of the first structure and the second structure, the lower end of described driving lever is connected and refers to spool, and the upper end of spool has axial U-shaped groove, and the lower end of described driving lever is radially plugged with finger, and the two ends of finger are connected in U-shaped groove.
As the third structure, described spring is positioned at the top of spool, and one end of spring and the upper end of spool push against, and the other end and upper cover push against; The first described valve body oil groove is communicated with A hydraulic fluid port, and the second valve body oil groove is communicated with T hydraulic fluid port, and the 3rd valve body oil groove is communicated with P hydraulic fluid port.
On the outer wall of described valve pocket, along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first valve pocket circular groove and second valve collar-shaped groove, the first described valve pocket circular groove communicates with the first valve body oil groove, second valve collar-shaped groove communicates with the second valve body oil groove, and the 3rd described valve body oil groove is positioned at the below of spool; Valve pocket is provided with the second valve pocket rectangle through hole at the first valve pocket circular groove place, is provided with the first valve pocket rectangle through hole at second valve collar-shaped groove place; Described spool from bottom to top has axial oilhole, this axial oilhole communicates with the 3rd valve body oil groove, on the outer wall of spool, along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first spool circular groove and the second spool circular groove, the second described spool circular groove place is provided with radially through hole being communicated with axial oilhole of at least two uniform spools, and spool is provided with spool rectangle through hole in the axial upper end of oilhole; Along with spool sliding up and down in valve pocket, the second described spool circular groove and the first valve pocket rectangle through hole form and to be communicated with or the relief valve valve port of off state; Along with the rotation of spool in valve pocket, described spool rectangle through hole and the second valve pocket rectangle through hole form and to be communicated with or the throttle valve valve port of off state; Described spool upper end has the holding cavity of putting spring, and described holding cavity is communicated with the first spool circular groove by the spool radial hole on spool, and the first described spool circular groove is communicated with the first valve pocket circular groove by the valve pocket radial hole on valve pocket.
Further improvement as the third structure, the lower end of described driving lever is connected and refers to spool, the lower end of driving lever has axial shrinkage pool from bottom to top, the upper end of described spool has top-down axial matching hole, this joint also comprises connecting rod, the lower end of connecting rod is socketed in the axially mutual hole of spool, and the other end is socketed in the axial shrinkage pool of driving lever.
Adopt after above structure, the present invention compares with there being technology, has the following advantages:
1) because the spool of relief valve and the spool of throttle valve are same spool, be equivalent to reduce the component of one of them duty valve, made the amount of parts of whole overflow throttle valve few, volume is little, compact structure;
2) simultaneously, spool sliding up and down in valve pocket coordinates the effect of having played a relief valve, the axial rotation of spool in valve pocket coordinates the effect of having played a throttle valve, therefore, the work of relief valve and throttle valve is independent of one another, mutual noninterference, has further realized the object of two functions of a spool;
3) in addition, because amount of parts is few, the difficulty of processing and the cumulative error of assembling are just little, therefore, have more guaranteed the functional reliability of overflow throttle valve, have also reduced cost of production simultaneously.
Accompanying drawing explanation
Fig. 1 is structural representation when spool is positioned at bottom in the first structure of overflow throttle valve of the present invention.
Fig. 2 is structural representation when spool is positioned at neutral position in the first structure of overflow throttle valve of the present invention.
Fig. 3 is structural representation when spool is positioned at topmost in the first structure of overflow throttle valve of the present invention.
Fig. 4 is the structural representation of valve pocket in the first structure of overflow throttle valve of the present invention.
Fig. 5 is the structural representation of spool in the first structure of overflow throttle valve of the present invention.
Fig. 6 be in Fig. 2 C-C to cross-sectional view.
Fig. 7 be in Fig. 2 D-D to cross-sectional view.
Fig. 8 be in Fig. 2 E-E to the valve port of the throttle valve of section from being closed to three kinds of structural representations of standard-sized sheet.
Fig. 9 is the structural representation of the second structure of overflow throttle valve of the present invention.
Figure 10 is the structural representation of the third structure of overflow throttle valve of the present invention.
Wherein: 1, knob; 2, driving lever; 3, upper cover; 4, valve body; 5, valve pocket; 6, the 3rd valve body oil groove; 7, spring; 8, P hydraulic fluid port; 9, A hydraulic fluid port; 10, T hydraulic fluid port; 11, spool; 12, the second valve body oil groove; 13, the first valve body oil groove; 14, finger; 15, locating stud; 16, lock pin; 17, the first valve pocket circular groove; 18, second valve collar-shaped groove; 19, the 3rd valve pocket circular groove; 20, the first valve pocket rectangle through hole; 21, the second valve pocket rectangle through hole; 22, valve pocket through hole radially; 23, valve pocket radial hole; 24, the first spool circular groove; 25, the second spool circular groove; 26, the 3rd spool circular groove; 27, spool rectangle through hole; 28, holding cavity; 29, U-shaped groove; 30, the first spool through hole radially; 31, second valve core diameter is to through hole; 32, axial oilhole; 33, spool radial hole; 34, valve pocket oilhole; 35, connecting rod; 36, spool through hole radially; 37, axial shrinkage pool; 38, axial matching hole;
N, valve pocket be the diameter of through hole radially; The height of t, the first valve pocket rectangle through hole; The height of m, the second valve pocket rectangle through hole; The groove width of h, the first spool circular groove; The height of k, spool rectangle through hole; The distance on edge under the upper edge of x, the first valve pocket rectangle through hole and the second spool circular groove.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in more detail.
Specific embodiment one
From the structural representation of the overflow throttle valve of the present invention shown in Fig. 1～Fig. 8, it comprises valve body 4, spill valve and throttle valve component, and described spill valve and throttle valve component are all connected on valve body 4.Spool in described spill valve and the spool in throttle valve component are same spool 11, and described spool 11 is positioned at valve body 4; The bottom surface of described valve body 4 has three hydraulic fluid ports, is respectively P hydraulic fluid port 8, T hydraulic fluid port 10 and A hydraulic fluid port 9, and these three hydraulic fluid ports respectively passage in valve body 4 communicate with spool 11.
Described overflow throttle valve also comprises knob 1, driving lever 2, upper cover 3, valve pocket 5 and spring 7.Wherein, the upper end of described driving lever 2 is connected with knob 1 by lock pin 16, and the lower end of driving lever 2 is connected with spool 11, and the middle part of driving lever 2 is rotatably connected in upper cover 3, and described upper cover 3 is connected on valve body 4.Described valve pocket 5 close-fittings are in valve body 4, and the upper end of valve pocket 5 is connected with upper cover 3 by locating stud 15, and described spool 11 is slidably connected and is rotatably connected in valve pocket 5.In described valve body 4, be provided with successively from top to bottom the first valve body oil groove 13, the second valve body oil groove 12 and the 3rd valve body oil groove 6 that all communicate with spool 11, these three valve body oil grooves are communicated with three hydraulic fluid ports of valve body 4 bottom surfaces respectively.
In the present embodiment, described spring 7 is positioned at the below of spool 11, and the bottom of one end of spring 7 and spool 11 pushes against, and the other end and valve body 4 push against.The first described valve body oil groove 13 is communicated with P hydraulic fluid port 8, and the second valve body oil groove 12 is communicated with T hydraulic fluid port 10, and the 3rd valve body oil groove 6 is communicated with A hydraulic fluid port 9.
On the outer wall of described valve pocket 5, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove 17, second valve collar-shaped groove 18 and the 3rd valve pocket circular groove 19, the first described valve pocket circular groove 17 communicates with the first valve body oil groove 13, second valve collar-shaped groove 18 communicates with the second valve body oil groove 12, and the 3rd valve pocket circular groove 19 communicates with the 3rd valve body oil groove 6.Valve pocket 5 is provided with radially through hole 22 of valve pocket at the first valve pocket circular groove 17 places, at second valve collar-shaped groove 18 places, is provided with the first valve pocket rectangle through hole 20, at the 3rd valve pocket circular groove 19 places, is provided with the second valve pocket rectangle through hole 21.Described spool 11 from top to bottom has axial oilhole 32, on the outer wall of spool 11, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove 24, the second spool circular groove 25 and the 3rd spool circular groove 26, the first described spool circular groove 24 places are provided with radially through hole 30 being communicated with axial oilhole 32 of at least two the first uniform spools, and the second spool circular groove 25 places are provided with at least two uniform second valve core diameters and are communicated with to through hole 31 and with axial oilhole 32.Spool 11 is provided with spool rectangle through hole 27 in the lower end of axial oilhole 32.In the present embodiment, the first described spool radially through hole 30 and second valve core diameter is two to the quantity of through hole 31, is crossing distribution.
Along with spool 11 sliding up and down in valve pocket 5, the second described spool circular groove 24 and the first valve pocket rectangle through hole 20 form and are communicated with or the relief valve valve port of off state.Along with the rotation of spool 11 in valve pocket 5, described spool rectangle through hole 27 and the second valve pocket rectangle through hole 21 form and are communicated with or the throttle valve valve port of off state.
Described spool 11 lower ends have the holding cavity 28 of putting spring 7, described holding cavity 28 is communicated with the 3rd spool circular groove 26 by the spool radial hole 33 on spool 11, and the 3rd described spool circular groove 26 is communicated with the 3rd valve pocket circular groove 19 by the valve pocket radial hole 23 on valve pocket 5.
The lower end of described driving lever 2 is connected and refers to spool 11, and the upper end of spool 11 has axial U-shaped groove 29, and the lower end of described driving lever 2 is radially plugged with finger 14, and the two ends of finger 14 are connected in U-shaped groove 29.
As shown in Figure 3, spool 11 is positioned at the position of the top of valve pocket 5, now, the upper edge of the first valve pocket rectangle through hole 20 and the second spool circular groove 25 lower to overlapping, i.e. x=0, in other words, the valve port opening of relief valve is 0, and relief valve is in closed condition.Now, the upper edge of spool rectangle through hole 27 overlaps with the upper edge of the second valve pocket rectangle through hole 21.
As shown in Figure 2, spool 11 is positioned at the neutral position of valve pocket 5, and now, spool 11 is toward lower slider, and the valve port of relief valve is opened gradually, and the value of x increases gradually.Until spool 11 slides into the position of the top in valve pocket 5, as shown in Figure 1, it is maximum that the value of x reaches, x=t, and the valve port of relief valve reaches maximum, and now, the lower edge of the first valve pocket rectangle through hole 20 is lower to overlapping with the second spool circular groove 25.As shown in Figure 7, because the second spool circular groove 25 is all-round setting, the area of passage of relief valve valve port is only the function of valve port opening x, irrelevant with the relative rotation of valve pocket 5 with spool 11.
As shown in Figure 4 and Figure 5, spool rectangle through hole 27 has a height k, the second valve pocket rectangle through hole 21 has a height m, when the top position of spool 11 in valve pocket 5, upper along overlapping along with the second valve pocket rectangle through hole 21 on spool rectangle through hole 27, during lowest positions in spool 11 slides into valve pocket 5, the lower edge of spool rectangle through hole 27 overlaps with the lower edge of the second valve pocket rectangle through hole 21, therefore, the maximum value x of the valve port opening of relief valve
max=t=m-k.
In other words, no matter the position of spool 11 in valve pocket 5 where, within spool rectangle through hole 27 is positioned at the scope of the second valve pocket rectangle through hole 21 in the axial direction all the time, and now the valve port opening of throttle valve is with the variation of the valve port opening x of relief valve, not change, as shown in Figure 8, the valve port opening of throttle valve is only that spool 11 is with respect to the function of the corner of valve pocket 5.In Fig. 8 a, spool rectangle through hole 27 does not communicate with the second valve pocket rectangle through hole 21, and now the valve port of throttle valve is closed; In Fig. 8 b, spool 11 is gradually in the interior axial rotation of valve pocket 5, and the valve port of throttle valve is opened and increased gradually, and spool rectangle through hole 27 communicates with the second valve pocket rectangle through hole 21; In Fig. 8 c, the valve port of throttle valve opens to maximum.
In addition, as shown in Figure 4, Figure 5 and Figure 6, the first spool circular groove 24 has a height h, valve pocket radially through hole 22 has height (being the diameter in a hole) n, the first spool circular groove 24 is all-round setting, when spool 11 slides up and down or during axial rotation, the first spool circular groove 24 has covered radially through hole 17 of valve pocket, i.e. h > n+x in valve pocket 5
max, therefore, the P hydraulic fluid port 8 of overflow throttle valve radially through hole 17 and the first spool through hole 30 radially of valve pocket of flowing through, the fluid that enters the axial oilhole 32 of spool 11 is not subject to the impact of spool 11 motions.
In sum, although the relief valve in this overflow throttle valve and throttle valve share a spool,, work function is independent of each other, does not mutually harass.
When the present invention works: from the P hydraulic fluid port 8 of valve body 4 bottoms, pass into pressure oil, through valve flowing channel, the first valve body oil groove 13, the first valve pocket circular groove 17, valve pocket radially through hole 22, the first spool circular groove 24 and the first spool radially through hole 30 enter in the axial oilhole 32 of spool 11.Axially the pressure oil in oilhole 32 is divided into two-way immediately: first via pressure oil, by overflow valve port (passing through successively second valve core diameter to through hole 31, the second spool circular groove 25 and the first valve pocket rectangle through hole 20), second valve collar-shaped groove 18, the second valve body oil groove 12, causes the oil return T hydraulic fluid port 10 of overflow throttle valve; The second road pressure oil, by throttle orifice (passing through successively spool rectangle through hole 27 and the second valve pocket rectangle through hole 21), the 3rd valve pocket circular groove 19, the 3rd valve body oil groove 6, causes the load A hydraulic fluid port 9 of overflow throttle valve.Simultaneously, the pressure oil at the 3rd valve pocket circular groove 19 places, by valve pocket radial hole 23, the 3rd spool circular groove 26 and spool radial hole 33, enter holding cavity 28 successively, and under the acting in conjunction of the spring force of spring 7, make the rear end pressure (being the pressure of load A hydraulic fluid port 9) of throttle orifice and the forefront pressure (being the pressure of P hydraulic fluid port 8) of throttle orifice keep balance.
Now, keep spool 11 constant with the relative angle of valve pocket 5, when the pressure at load port A hydraulic fluid port 9 places raises, spool 11 moves under the effect of pressure oil, the valve port opening x of relief valve reduces, and the flow by the off-load of overflow valve port reduces, and the valve port forefront pressure (being the pressure of P hydraulic fluid port 8) of throttle valve is raise, until spool 11 reaches balance in new position, guarantee that thus the valve port front and back pressure reduction of throttle valve keeps stable.And when the hypotension at load port A hydraulic fluid port 9 places, spool 11 moves down under the effect of pressure oil, the valve port opening x of relief valve increases, the flow by the off-load of overflow valve port increases, the valve port forefront pressure (being the pressure of P hydraulic fluid port 8) of throttle valve is synchronously reduced, until spool 11 reaches balance in new position, guarantee that thus the valve port front and back pressure reduction of flow controller keeps stable.
Therefore, pressure reduction and mouthful pressure independent for A hydraulic fluid port 9 of loading before and after the valve port of throttle valve, oil inlet P hydraulic fluid port 8 can oneself adapt to the change in pressure of load port A hydraulic fluid port 9, makes to keep constant by the flow of throttle valve valve port.
Turning knob 1, under the effect of lock pin 16, drive driving lever 2 to rotate, under the effect of the U-shaped groove 29 of finger 14 and spool 11, be with movable valve plug 11 to rotate, spool 11 is changed with respect to the corner of valve pocket 5, the size of adjusting the valve port of throttle valve with this, makes overflow throttle valve export proportional flow.
Concrete enforcement two
The structural representation of overflow throttle valve is as shown in Figure 9 known, and it comprises valve body 4, spill valve and throttle valve component, and described spill valve and throttle valve component are all connected on valve body 4.Spool in described spill valve and the spool in throttle valve component are same spool 11, and described spool 11 is positioned at valve body 4; The bottom surface of described valve body 4 has three hydraulic fluid ports, is respectively P hydraulic fluid port 8, T hydraulic fluid port 10 and A hydraulic fluid port 9, and these three hydraulic fluid ports respectively passage in valve body 4 communicate with spool 11.
Described overflow throttle valve also comprises knob 1, driving lever 2, upper cover 3, valve pocket 5 and spring 7.Wherein, the upper end of described driving lever 2 is connected with knob 1 by lock pin 16, and the lower end of driving lever 2 is connected with spool 11, and the middle part of driving lever 2 is rotatably connected in upper cover 3, and described upper cover 3 is connected on valve body 4.Described valve pocket 5 close-fittings are in valve body 4, and the upper end of valve pocket 5 is connected with upper cover 3 by locating stud 15, and described spool 11 is slidably connected and is rotatably connected in valve pocket 5.In described valve body 4, be provided with successively from top to bottom the first valve body oil groove 13, the second valve body oil groove 12 and the 3rd valve body oil groove 6 that all communicate with spool 11, these three valve body oil grooves are communicated with three hydraulic fluid ports of valve body 4 bottom surfaces respectively.
In the present embodiment, described spring 7 is positioned at the below of spool 11, and the bottom of one end of spring 7 and spool 11 pushes against, and the other end and valve body 4 push against.The first described valve body oil groove 13 is communicated with P hydraulic fluid port 8, and the second valve body oil groove 12 is communicated with A hydraulic fluid port 9, and the 3rd valve body oil groove 6 is communicated with T hydraulic fluid port 10.
On the outer wall of described valve pocket 5, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove 17, second valve collar-shaped groove 18 and the 3rd valve pocket circular groove 19, the first described valve pocket circular groove 17 communicates with the first valve body oil groove 13, second valve collar-shaped groove 18 communicates with the second valve body oil groove 12, and the 3rd valve pocket circular groove 19 communicates with the 3rd valve body oil groove 6.Valve pocket 5 is provided with radially through hole 22 of valve pocket at the first valve pocket circular groove 17 places, at second valve collar-shaped groove 18 places, is provided with the second valve pocket rectangle through hole 21, at the 3rd valve pocket circular groove 19 places, is provided with the first valve pocket rectangle through hole 20.Described spool 11 from top to bottom has axial oilhole 32, on the outer wall of spool 11, along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove 24, the second spool circular groove 25 and the 3rd spool circular groove 26, the first described spool circular groove 24 places are provided with radially through hole 30 being communicated with axial oilhole 32 of at least two the first uniform spools, the second spool circular groove 25 places are provided with at least two uniform second valve core diameters to through hole 31, described second valve core diameter is positioned at the lower end of axial oilhole 32 to through hole 31, the first described spool radially through hole 30 is provided with the spool rectangle through hole 27 corresponding with the position of the second valve pocket rectangle through hole 21 to spool 11 middle parts between through hole 31 with second valve core diameter.In the present embodiment, the first described spool radially through hole 30 and second valve core diameter is two to the quantity of through hole 31, is crossing distribution.
Along with spool 11 sliding up and down in valve pocket 5, the 3rd described spool circular groove 26 and the first valve pocket rectangle through hole 20 form and are communicated with or the relief valve valve port of off state.Along with the rotation of spool 11 in valve pocket 5, described spool rectangle through hole 27 and the second valve pocket rectangle through hole 21 form and are communicated with or the throttle valve valve port of off state.
Described spool 11 lower ends have the holding cavity 28 of putting spring 7, described holding cavity 28 is communicated with the 3rd spool circular groove 26 by the spool radial hole 33 on spool 11, and the 3rd described spool circular groove 26 is communicated with second valve collar-shaped groove 18 by the valve pocket oilhole 34 on valve pocket 5.In the present embodiment, valve pocket oilhole 34 is that two radial direction oil hole and axial oilhole are realized being communicated with of second valve collar-shaped groove 18 and the 3rd spool circular groove 26.
The lower end of described driving lever 2 is connected and refers to spool 11, and the upper end of spool 11 has axial U-shaped groove 29, and the lower end of described driving lever 2 is radially plugged with finger 14, and the two ends of finger 14 are connected in U-shaped groove 29.
When the present invention works: from the P hydraulic fluid port 8 of valve body 4 bottoms, pass into pressure oil, through valve flowing channel, the first valve body oil groove 13, the first valve pocket circular groove 17, valve pocket radially through hole 22, the first spool circular groove 24 and the first spool radially through hole 30 enter in the axial oilhole 32 of spool 11.Axially the pressure oil in oilhole 32 is divided into two-way immediately: first via pressure oil, by overflow valve port (passing through successively second valve core diameter to through hole 31, the second spool circular groove 25 and the first valve pocket rectangle through hole 20), the 3rd valve pocket circular groove 19, the 3rd valve body oil groove 6, causes the oil return T hydraulic fluid port 10 of overflow throttle valve; The second road pressure oil, by throttle orifice (passing through successively spool rectangle through hole 27 and the second valve pocket rectangle through hole 21), second valve collar-shaped groove 18, the second valve body oil groove 12, causes the load A hydraulic fluid port 9 of overflow throttle valve.Simultaneously, the pressure oil at second valve collar-shaped groove 18 places, by valve pocket oilhole 34, the 3rd spool circular groove 26 and spool radial hole 33, enter holding cavity 28 successively, under the effect of the spring force of spring 7, make the rear end pressure (being the pressure of load A hydraulic fluid port 9) of throttle orifice and the forefront pressure (being the pressure of P hydraulic fluid port 8) of throttle orifice keep balance.
Specific embodiment three
The structural representation of overflow throttle valve is as shown in Figure 10 known, and it comprises valve body 4, spill valve and throttle valve component, and described spill valve and throttle valve component are all connected on valve body 4.Spool in described spill valve and the spool in throttle valve component are same spool 11, and described spool 11 is positioned at valve body 4; The bottom surface of described valve body 4 has three hydraulic fluid ports, is respectively P hydraulic fluid port 8, T hydraulic fluid port 10 and A hydraulic fluid port 9, and these three hydraulic fluid ports respectively passage in valve body 4 communicate with spool 11.
Described overflow throttle valve also comprises knob 1, driving lever 2, upper cover 3, valve pocket 5 and spring 7.Wherein, the upper end of described driving lever 2 is connected with knob 1 by lock pin 16, and the lower end of driving lever 2 is connected with spool 11, and the middle part of driving lever 2 is rotatably connected in upper cover 3, and described upper cover 3 is connected on valve body 4.Described valve pocket 5 close-fittings are in valve body 4, and the upper end of valve pocket 5 is connected with upper cover 3 by locating stud 15, and described spool 11 is slidably connected and is rotatably connected in valve pocket 5.In described valve body 4, be provided with successively from top to bottom the first valve body oil groove 13, the second valve body oil groove 12 and the 3rd valve body oil groove 6 that all communicate with spool 11, these three valve body oil grooves are communicated with three hydraulic fluid ports of valve body 4 bottom surfaces respectively.
In the present embodiment, described spring 7 is positioned at the top of spool 11, and the upper end of one end of spring 7 and spool 11 pushes against, and the other end and upper cover 3 push against.The first described valve body oil groove 13 is communicated with A hydraulic fluid port 9, and the second valve body oil groove 12 is communicated with T hydraulic fluid port 10, and the 3rd valve body oil groove 6 is communicated with P hydraulic fluid port 8.
On the outer wall of described valve pocket 5, along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first valve pocket circular groove 17 and second valve collar-shaped groove 18, the first described valve pocket circular groove 17 communicates with the first valve body oil groove 13, second valve collar-shaped groove 18 communicates with the second valve body oil groove 12, and the 3rd described valve body oil groove 6 is positioned at the below of spool 11.Valve pocket 5 is provided with the second valve pocket rectangle through hole 21 at the first valve pocket circular groove 17 places, at second valve collar-shaped groove 18 places, is provided with the first valve pocket rectangle through hole 20.Described spool 11 from bottom to top has axial oilhole 32, this axial oilhole 32 communicates with the 3rd valve body oil groove 6, on the outer wall of spool 11, along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first spool circular groove 24 and the second spool circular groove 25, the second described spool circular groove 25 places are provided with radially through hole 36 being communicated with axial oilhole 32 of at least two uniform spools, and spool 11 is provided with spool rectangle through hole 27 in the axial upper end of oilhole 32.Along with spool 11 sliding up and down in valve pocket 5, the second described spool circular groove 25 and the first valve pocket rectangle through hole 20 form and are communicated with or the relief valve valve port of off state.Along with the rotation of spool 11 in valve pocket 5, described spool rectangle through hole 27 and the second valve pocket rectangle through hole 21 form and are communicated with or the throttle valve valve port of off state.Described spool 11 upper ends have the holding cavity 28 of putting spring 7, described holding cavity 28 is communicated with the first spool circular groove 24 by the spool radial hole 33 on spool 11, and the first described spool circular groove 24 is communicated with the first valve pocket circular groove 17 by the valve pocket radial hole 23 on valve pocket 5.In the present embodiment, the described spool radially quantity of through hole 36 is two, is crossing distribution.
The lower end of described driving lever 2 is connected and refers to spool 11, the lower end of driving lever 2 has axial shrinkage pool 37 from bottom to top, the upper end of described spool 11 has top-down axial matching hole 38, this joint also comprises connecting rod 35, the lower end of connecting rod 35 is socketed in the axially mutual hole 38 of spool 11, and the other end is socketed in the axial shrinkage pool 37 of driving lever 2.
When the present invention works: pass into pressure oil from the P hydraulic fluid port 8 of valve body 4 bottoms, enter in the axial oilhole 32 of spool 11 through valve flowing channel and the 3rd valve body oil groove 6.Axially the pressure oil in oilhole 32 is divided into two-way immediately: first via pressure oil, by overflow valve port (passing through successively spool radially through hole 36, the second spool circular groove 25 and the first valve pocket rectangle through hole 20), second valve collar-shaped groove 18, the second valve body oil groove 12, causes the oil return T hydraulic fluid port 10 of overflow throttle valve; The second road pressure oil, by throttle orifice (passing through successively spool rectangle through hole 27 and the second valve pocket rectangle through hole 21), the first valve pocket circular groove 17, the first valve body oil groove 13, causes the load A hydraulic fluid port 9 of overflow throttle valve.Simultaneously, the pressure oil at the first valve pocket circular groove 17 places, by valve pocket radial hole 32, the first spool circular groove 24 and spool radial hole 33, enter holding cavity 28 successively, under the effect of the spring force of spring 7, make the rear end pressure (being the pressure of load A hydraulic fluid port 9) of throttle orifice and the forefront pressure (being the pressure of P hydraulic fluid port 8) of throttle orifice keep balance.
The present invention is not limited to above-described structure, wherein: in specific embodiment one and specific embodiment two, the first spool radially through hole 30 and second valve core diameter can be also three or more to the quantity of through hole 31, and radially through hole is uniform in a circumferential direction for these; In specific embodiment three, the spool radially quantity of through hole 36 can be also three or more, and radially through hole is uniform in a circumferential direction for these
Within these variations all fall into protection scope of the present invention above.
Claims (10)
1. an overflow throttle valve, comprise valve body (4), spill valve and throttle valve component, described spill valve and throttle valve component are all connected on valve body (4), it is characterized in that: the spool in described spill valve and the spool in throttle valve component are same spool (11), and described spool (11) is positioned at valve body (4); The bottom surface of described valve body (4) has three hydraulic fluid ports, is respectively P hydraulic fluid port (8), T hydraulic fluid port (10) and A hydraulic fluid port (9), and these three hydraulic fluid ports respectively passage in valve body (4) communicate with spool (11).
2. overflow throttle valve according to claim 1, is characterized in that: described overflow throttle valve also comprises knob (1), driving lever (2), upper cover (3), valve pocket (5) and spring (7); Wherein, the upper end of described driving lever (2) is connected with knob (1) by lock pin (16), the lower end of driving lever (2) is connected with spool (11), the middle part of driving lever (2) is rotatably connected in upper cover (3), and described upper cover (3) is connected on valve body (4); Described valve pocket (5) close-fitting is in valve body (4), and the upper end of valve pocket (5) is connected with upper cover (3) by locating stud (15), and described spool (11) is slidably connected and is rotatably connected in valve pocket (5); In described valve body (4), be provided with successively from top to bottom the first valve body oil groove (13), the second valve body oil groove (12) and the 3rd valve body oil groove (6) that all communicate with spool (11), these three valve body oil grooves are communicated with three hydraulic fluid ports of valve body (4) bottom surface respectively.
3. overflow throttle valve according to claim 2, is characterized in that: described spring (7) is positioned at the below of spool (11), and the bottom of one end of spring (7) and spool (11) pushes against, and the other end and valve body (4) push against; The first described valve body oil groove (13) is communicated with P hydraulic fluid port (8), and the second valve body oil groove (12) is communicated with T hydraulic fluid port (10), and the 3rd valve body oil groove (6) is communicated with A hydraulic fluid port (9).
4. overflow throttle valve according to claim 3, it is characterized in that: on the outer wall of described valve pocket (5), along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove (17), second valve collar-shaped groove (18) and the 3rd valve pocket circular groove (19), the first described valve pocket circular groove (17) communicates with the first valve body oil groove (13), second valve collar-shaped groove (18) communicates with the second valve body oil groove (12), and the 3rd valve pocket circular groove (19) communicates with the 3rd valve body oil groove (6); Valve pocket (5) locates to be provided with radially through hole (22) of valve pocket at the first valve pocket circular groove (17), at second valve collar-shaped groove (18), locate to be provided with the first valve pocket rectangle through hole (20), at the 3rd valve pocket circular groove (19), locate to be provided with the second valve pocket rectangle through hole (21); Described spool (11) from top to bottom has axial oilhole (32), on the outer wall of spool (11), along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove (24), the second spool circular groove (25) and the 3rd spool circular groove (26), the first described spool circular groove (24) locates to be provided with radially through hole (30) being communicated with axial oilhole (32) of at least two the first uniform spools, and the second spool circular groove (25) is located to be provided with at least two uniform second valve core diameters and is communicated with to through hole (31) and with axial oilhole (32); Spool (11) is provided with spool rectangle through hole (27) in the lower end of axial oilhole (32); Along with spool (11) sliding up and down in valve pocket (5), the second described spool circular groove (24) and the first valve pocket rectangle through hole (20) form and to be communicated with or the relief valve valve port of off state; Along with the rotation of spool (11) in valve pocket (5), described spool rectangle through hole (27) and the second valve pocket rectangle through hole (21) form and to be communicated with or the throttle valve valve port of off state; Described spool (11) lower end has the holding cavity (28) of putting spring (7), described holding cavity (28) is communicated with the 3rd spool circular groove (26) by the spool radial hole (33) on spool (11), and the 3rd described spool circular groove (26) is communicated with the 3rd valve pocket circular groove (19) by the valve pocket radial hole (23) on valve pocket (5).
5. overflow throttle valve according to claim 2, is characterized in that: described spring (7) is positioned at the below of spool (11), and the bottom of one end of spring (7) and spool (11) pushes against, and the other end and valve body (4) push against; The first described valve body oil groove (13) is communicated with P hydraulic fluid port (8), and the second valve body oil groove (12) is communicated with A hydraulic fluid port (9), and the 3rd valve body oil groove (6) is communicated with T hydraulic fluid port (10).
6. overflow throttle valve according to claim 5, it is characterized in that: on the outer wall of described valve pocket (5), along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first valve pocket circular groove (17), second valve collar-shaped groove (18) and the 3rd valve pocket circular groove (19), the first described valve pocket circular groove (17) communicates with the first valve body oil groove (13), second valve collar-shaped groove (18) communicates with the second valve body oil groove (12), and the 3rd valve pocket circular groove (19) communicates with the 3rd valve body oil groove (6), valve pocket (5) locates to be provided with radially through hole (22) of valve pocket at the first valve pocket circular groove (17), at second valve collar-shaped groove (18), locate to be provided with the second valve pocket rectangle through hole (21), at the 3rd valve pocket circular groove (19), locate to be provided with the first valve pocket rectangle through hole (20), described spool (11) from top to bottom has axial oilhole (32), on the outer wall of spool (11), along the circumferential direction there are three parallel circular grooves of upper, middle and lower, be respectively the first spool circular groove (24), the second spool circular groove (25) and the 3rd spool circular groove (26), the first described spool circular groove (24) locates to be provided with radially through hole (30) being communicated with axial oilhole (32) of at least two the first uniform spools, the second spool circular groove (25) locates to be provided with at least two uniform second valve core diameters to through hole (31), described second valve core diameter is positioned at the lower end of axial oilhole (32) to through hole (31), the first described spool radially through hole (30) is provided with the spool rectangle through hole (27) corresponding with the position of the second valve pocket rectangle through hole (21) with second valve core diameter to spool (11) middle part between through hole (31), along with spool (11) sliding up and down in valve pocket (5), the 3rd described spool circular groove (26) and the first valve pocket rectangle through hole (20) form and to be communicated with or the relief valve valve port of off state, along with the rotation of spool (11) in valve pocket (5), described spool rectangle through hole (27) and the second valve pocket rectangle through hole (21) form and to be communicated with or the throttle valve valve port of off state, described spool (11) lower end has the holding cavity (28) of putting spring (7), described holding cavity (28) is communicated with the 3rd spool circular groove (26) by the spool radial hole (33) on spool (11), and the 3rd described spool circular groove (26) is communicated with second valve collar-shaped groove (18) by the valve pocket oilhole (34) on valve pocket (5).
7. according to the overflow throttle valve described in claim 3 or 5, it is characterized in that: the lower end of described driving lever (2) is connected and refers to spool (11), the upper end of spool (11) has axial U-shaped groove (29), the lower end of described driving lever (2) is radially plugged with finger (14), and the two ends of finger (14) are connected in U-shaped groove (29).
8. overflow throttle valve according to claim 2, is characterized in that: described spring (7) is positioned at the top of spool (11), and the upper end of one end of spring (7) and spool (11) pushes against, and the other end and upper cover (3) push against; The first described valve body oil groove (13) is communicated with A hydraulic fluid port (9), and the second valve body oil groove (12) is communicated with T hydraulic fluid port (10), and the 3rd valve body oil groove (6) is communicated with P hydraulic fluid port (8).
9. overflow throttle valve according to claim 8, it is characterized in that: on the outer wall of described valve pocket (5), along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first valve pocket circular groove (17) and second valve collar-shaped groove (18), the first described valve pocket circular groove (17) communicates with the first valve body oil groove (13), second valve collar-shaped groove (18) communicates with the second valve body oil groove (12), and the 3rd described valve body oil groove (6) is positioned at the below of spool (11); Valve pocket (5) locates to be provided with the second valve pocket rectangle through hole (21) at the first valve pocket circular groove (17), at second valve collar-shaped groove (18), locates to be provided with the first valve pocket rectangle through hole (20); Described spool (11) from bottom to top has axial oilhole (32), this axial oilhole (32) communicates with the 3rd valve body oil groove (6), on the outer wall of spool (11), along the circumferential direction there are upper and lower two parallel circular grooves, be respectively the first spool circular groove (24) and the second spool circular groove (25), the second described spool circular groove (25) locates to be provided with radially through hole (36) being communicated with axial oilhole (32) of at least two uniform spools, and spool (11) is provided with spool rectangle through hole (27) in the axial upper end of oilhole (32); Along with spool (11) sliding up and down in valve pocket (5), the second described spool circular groove (25) and the first valve pocket rectangle through hole (20) form and to be communicated with or the relief valve valve port of off state; Along with the rotation of spool (11) in valve pocket (5), described spool rectangle through hole (27) and the second valve pocket rectangle through hole (21) form and to be communicated with or the throttle valve valve port of off state; Described spool (11) upper end has the holding cavity (28) of putting spring (7), described holding cavity (28) is communicated with the first spool circular groove (24) by the spool radial hole (33) on spool (11), and the first described spool circular groove (24) is communicated with the first valve pocket circular groove (17) by the valve pocket radial hole (23) on valve pocket (5).
10. overflow throttle valve according to claim 8, it is characterized in that: the lower end of described driving lever (2) is connected and refers to spool (11), the lower end of driving lever (2) has axial shrinkage pool (37) from bottom to top, the upper end of described spool (11) has top-down axial matching hole (38), this joint also comprises connecting rod (35), the lower end of connecting rod (35) is socketed in the axial matching hole (38) of spool (11), and the other end is socketed in the axial shrinkage pool (37) of driving lever (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110392622.XA CN102400970B (en) | 2011-12-01 | 2011-12-01 | Overflow throttling valve |
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|---|---|---|---|
| CN201110392622.XA CN102400970B (en) | 2011-12-01 | 2011-12-01 | Overflow throttling valve |
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| CN102400970A CN102400970A (en) | 2012-04-04 |
| CN102400970B true CN102400970B (en) | 2014-11-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107618022B (en) * | 2017-09-14 | 2024-04-26 | 西南交通大学 | Volume speed-regulating hydraulic system and power-assisted lower limb exoskeleton |
| CN111692149B (en) * | 2020-05-25 | 2022-11-01 | 宁波华液机器制造有限公司 | Stacked three-way flow valve |
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| CN202468512U (en) * | 2012-03-12 | 2012-10-03 | 黄培华 | Combined reversing valve |
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| US7270149B2 (en) * | 2005-10-05 | 2007-09-18 | Mediland Enterprise Corporation | Rotary valve assembly |
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| JP2739663B2 (en) * | 1991-03-18 | 1998-04-15 | マック・バルブズ・インコーポレーテッド | Direct-acting electromagnetic four-way switching flow control poppet air valve and method of manufacturing the electromagnetic poppet valve |
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