CN101666337A - Manually controlled single-acting blade-type hydraulic transformer - Google Patents

Abstract

The invention relates to a manually controlled single-acting blade-type hydraulic transformer, comprising a shell, a rotating shaft, a left end cap, a valve plate, stators, rotors, a wedge-shaped plate, a right end cap, blades, pre-tightening adjusting screws, eccentric adjusting screws, nuts, pre-tightening springs, a variable plunger piston, and the like. The hydraulic transformer is characterized in that the centers of one group of rotors and the center of the stator are fixed and are not superposed; the centers of the other group of rotors are fixed, the center of the stator can be positioned on the left sides or the right sides of the centers of the rotors; the blades are arranged along the radial direction of the rotors, the rotors are matched and connected with the rotating shaft byflat keys, the external surface of one stator matches and contacts with the right lateral face of the wedge-shaped plate, the right surface of the other stator contacts with the left end of the variable plunger piston and the left surface contacts with the right end of a sliding seat; and the valve plate is installed on the rotating shaft and is tightly pressed on the left lateral face and the right lateral face of each stator, the left end and the right end of the rotating shaft are installed on the left end cap and the right end cap by sliding bearings, and the left end cap and the right end cap are fixed on the shell by bolts.

Description

A kind of single-acting blade-type hydraulic transformer of manual control

(1) technical field

The present invention relates to a kind of hydraulic transformer, specifically a kind of single-acting blade-type hydraulic transformer of manual control belongs to mechanical field.

(2) background technique

Hydraulic transformer is meant a kind of hydraulic element of realizing the pressure conversion in hydraulic transmission.Hydraulic transformer can be converted to output hydraulic pressure energy under the another kind of pressure to the input hydraulic pressure under the setting pressure expeditiously, use it can realize multi-load mutual incoherent control in constant pressure network, also can make the energy reverse flow, not only can not have restriction loss ground and drive the straight line load, but also can the rotary driving load.

Existing hydraulic transformer all is plunger-type structure basically, its working pressure height, more than 20Mpa, range of flow is big, generally be used for high pressure, high-volume hydraulic system, in, use in the low-pressure hydraulic system, efficient is very low, and plunger hydraulic transformer device structure complexity, machining accuracy height, to the oil pollution sensitivity, oil strain required precision height, price are expensive, therefore make the application area of hydraulic transformer be subjected to very big restriction.

(3) summary of the invention

Technical assignment of the present invention is at the deficiencies in the prior art, a kind of compact structure is provided, flow is even, noise is little, running accuracy is high, reliable performance and steadily, be applied to the frequent or field work of transformation in the single-acting blade-type hydraulic transformer of a kind of manual control of low-pressure hydraulic system, to enrich the kind of hydraulic transformer, enlarge the application area of hydraulic transformer.

The present invention solves the technological scheme that its technical problem is taked:

A kind of single-acting blade-type hydraulic transformer of manual control comprises that housing, left end cap, running shaft, thrust plate, rotor, stator, blade, press table, roller, top board, upper end cap, right end cap, wedge shaped plate, left cover, pretightening force are adjusted screw, off-centre is adjusted screw, nut, spring seat, preloading spring, slide, variable piston, right cover plate etc.The center of one group rotor and the center of stator are all fixed, centre of rotor does not overlap with the center of stator, certain throw of eccentric is arranged, the wedge shaped plate left surface contacts with the shell inner surface cooperation, the wedge shaped plate right flank contacts with the stator outer surface cooperation, the width of rotor is slightly littler than the width of stator, rotor is installed in the stator, one end of blade is put into the blade groove of rotor, the other end contacts with inner surface of stator, and blade is settled along rotor radial, and thrust plate is installed on the running shaft, and be pressed on stator about on two sides, rotor cooperates connection with the right axle shaft of running shaft by flat key.The center of another group rotor is fixed, the center of stator can be in the left side or the right side of rotor center, the width of rotor is slightly littler than the width of stator, rotor is installed in the stator, one end of blade is put into the blade groove of rotor, the other end contacts with inner surface of stator, blade is settled along rotor radial, rotor cooperates connection with the left half axle of running shaft by flat key, the left end of variable piston contacts with the right surface of stator, the right-hand member of variable piston contacts with an eccentric left end head of adjusting screw, variable piston is installed in the housing, the eccentric screw of adjusting is installed in the right cover plate, and is fastened on the right cover plate by a nut, and right cover plate is installed on the housing by bolt; The right-hand member of slide contacts with the left surface of stator, slide is installed in the housing, one end of preloading spring is put into slide, the other end of preloading spring is placed on the spring seat, spring seat contacts with the right-hand member head that pretightening force is adjusted screw, pretightening force is adjusted screw and is installed in the left cover, and is fastened on the left cover by another nut, and left cover is installed on the housing by bolt; Preloading spring had a certain size pretightening force when centre of rotor overlapped with the center of stator; Upper end cap is by being bolted on the housing, top board by Bolt Connection on upper end cap, press table contacts with the stator external surface cooperation, roller is installed between top board and the press table, roller contacts with the lower surface of top board and the upper surface cooperation of press table, thrust plate is installed on the running shaft, and be pressed on stator about on two sides.The left and right two ends of running shaft are installed on left end cap and the right end cap by sliding bearing, and right end cap, left end cap are by being bolted on the housing.

The single-acting blade-type hydraulic transformer of a kind of manual control of the present invention compared with prior art, the beneficial effect that is produced is:

(1) the present invention can be adjusted into arbitrary value in the induced pressure excursion with the constant pressure network system pressure in the mode of no restriction loss.

(2) the present invention can be applicable in the low-pressure hydraulic system, promptly in the hydraulic system below the 7Mpa, has enlarged the application area of hydraulic transformer, has enriched the kind of hydraulic transformer.

(3) volume of the present invention is little, in light weight, rotary inertia is little, easy maintenance, and reliable performance, dynamic response is fast.

(4) description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a structure diagram of the present invention

Fig. 2 is an A-A view of the present invention

Fig. 3 is a B-B view of the present invention

Fig. 4 is a hydraulic fluid port Connecting format schematic representation of the present invention

Fig. 5 is a transformation principle schematic of the present invention

Among the figure: 1. housing, 2. left end cap, 3. running shaft, 4,7,8,15. thrust plates, 5,9. rotor, 6,10. stator, 11. upper end caps, 12. top boards, 13. roller, 14. press tables, 16. right end caps, 17. wedge shaped plates, 18,25. blades, 19. left covers, 20. pretightening forces are adjusted screw, the 28. eccentric screws of adjusting, 21,27. nuts, 22. spring seats, 23. preloading springs, 24. slide, 26. variable pistons, 29. right cover plates

(5) embodiment

Explain below below in conjunction with drawings and Examples the present invention being done.

As shown in Figure 1, 2, 3, the single-acting blade-type hydraulic transformer of a kind of manual control of the present invention mainly by housing 1, left end cap 2, running shaft 3, thrust plate 4,7,8,15 and rotor 5,9 and stator 6,10 and press table 14, roller 13, top board 12, upper end cap 11, right end cap 16, wedge shaped plate 17, left cover 19, pretightening force adjust screw 20, eccentric screw 28, nut 21,27 and spring seat 22, preloading spring 23, slide 24, variable piston 26, right cover plate 29, the blades 18,25 etc. adjusted are formed; The center of the center of rotor 5 and stator 6 is all fixed, the center of rotor 5 does not overlap with the center of stator 6, certain throw of eccentric is arranged, wedge shaped plate 17 left surfaces contact with the cooperation of housing 1 internal surface, wedge shaped plate 17 right flanks contact with the cooperation of stator 6 outer surfaces, the width of rotor 5 is slightly littler than the width of stator 6, rotor 5 is installed in the stator 6, one end of blade 18 is put into the blade groove of rotor 5, the other end contacts with the internal surface of stator 6, blade 18 is radially settled (being that laying angle is zero) along rotor 5, thrust plate 4,7 are installed on the running shaft 3, and be pressed on stator 6 about on two sides, rotor 5 cooperates connection with the left half axle of running shaft 3 by flat key, under the effect of constant pressure network system mesohigh oil, but 3 rotations of rotor 5 driven rotary axles; The center of rotor 9 is fixed, the center of stator 10 can be moved to the left or to the right, the center of stator 10 can be in the left side or the right side at rotor 9 centers, and the width of rotor 9 is slightly littler than the width of stator 10, and rotor 9 is installed in the stator 10, one end of blade 25 is put into the blade groove of rotor 9, the other end contacts with the internal surface of stator 10, and blade 25 is radially settled along rotor 9, and rotor 9 cooperates connection with the right axle shaft of running shaft 3 by flat key, drive rotor 9 rotations, pressure oil output by running shaft 3; The left end of variable piston 26 contacts with the right surface of stator 10, the right-hand member of variable piston 26 contacts with the eccentric left end head of adjusting screw 28, variable piston 26 is installed in the housing 1, the eccentric screw 28 of adjusting is installed in the right cover plate 29, and be fastened on the right cover plate 29 by nut 27, right cover plate 29 is installed on the housing 1 by bolt, adjust screw 28 by rotating eccentricity and can drive variable piston 26 move left and right, the right-hand member of slide 24 contacts with the left surface of stator 10, slide 24 is installed in the housing 1, one end of preloading spring 23 is put into slide 24, the other end of preloading spring 23 is placed on the spring seat 22, spring seat 22 contacts with the right-hand member head that pretightening force is adjusted screw 20, pretightening force is adjusted screw 20 and is installed in the left cover 19, and be fastened on the left cover 19 by nut 21, left cover 19 is installed on the housing 1 by bolt, adjust the pretightening force that screw 20 can be adjusted preloading spring 23 by the rotation pretightening force, when not working, the center of rotor 9 overlaps (this position is called initial position) with the center of stator 10, this moment, preloading spring 23 had a certain size pretightening force, during work, clockwise or be rotated counterclockwise the eccentric screw 28 of adjusting and drive variable piston 26 and move to the left or to the right, move to the left or to the right thereby drive stator 10, change rotor 9 and realize variable with the size and Orientation of stator 10 throw of eccentric; Upper end cap 11 is by being bolted on the housing 1, top board 12 by Bolt Connection on upper end cap 11, press table 14 contacts with the outer surface cooperation of stator 10, roller 13 is installed between top board 12 and the press table 14, roller 13 contacts with the lower surface of top board 12 and the upper surface cooperation of press table 14, press table 14 can be with stator 10 move left and right, and thrust plate 8,15 is installed on the running shaft 3, and be pressed on stator 10 about on two sides; The left and right two ends of running shaft 3 are installed on left end cap 2 and the right end cap 16 by sliding bearing, and right end cap 16, left end cap 2 are by being bolted on the housing 1.

Form quantitative part 30 by running shaft 3, wedge shaped plate 17, rotor 5, stator 6, blade 18 and thrust plate 4,7 etc., adjust screw 20, eccentric screw 28, nut 21,27 and the composition variable parts 31 such as spring seat 22, preloading spring 23, slide 24, variable piston 26, upper end cap 11, top board 12, press table 14, roller 13 and thrust plate 8,15 adjusted by running shaft 3, rotor 9, stator 10, blade 25, left cover 19, right cover plate 29, pretightening force; As shown in Figure 4, the quantitative part 30 of the single-acting blade-type hydraulic transformer of described a kind of manual control and structure, the functional similarity of quantitative single-acting sliding-vane motor, quantitative part 30 can be seen a quantitative single-acting sliding-vane motor as; The variable parts 31 of the single-acting blade-type hydraulic transformer of described a kind of manual control and structure, the functional similarity of single-acting blade-type secondary component, variable parts 31 can be seen a single-acting blade-type secondary component as; So, the single-acting blade-type hydraulic transformer of described a kind of manual control can be regarded as and formed by secondary component and fixed displacement motor coaxial rigid connection, the upper left hydraulic fluid port of quantitative part 30 is a kind of filler opening M of single-acting blade-type hydraulic transformer of manual control, filler opening M is connected with the high voltage terminal of constant pressure network system, the upper right hydraulic fluid port of variable parts 31 is a kind of oil outlet N of single-acting blade-type hydraulic transformer of manual control, oil outlet N is connected with load end, filler opening M is identical with oil outlet N size, the following hydraulic fluid port of quantitative part 30 and the following hydraulic fluid port of variable parts 31 link together, become hydraulic fluid port O of single-acting blade-type hydraulic transformer of a kind of manual control, hydraulic fluid port O is connected with fuel tank, hydraulic fluid port O replenishes fluid to hydraulic transformer on the one hand, fluid with unnecessary fluid and hydraulic transformer internal leakage generation flows back to fuel tank on the other hand, and hydraulic fluid port O is greater than filler opening M and oil outlet N.

As shown in Figure 5, in the constant pressure network pressure p ₁Effect under, the active torque that quantitative part 30 produces is:

${\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="A2009100184200010H1.png,A2009100184200011H1.png"\; state="\{\{state\}\}">T</figure-callout>}}_1=\frac{{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="A2009100184200010H1.png,A2009100184200011H1.png"\; state="\{\{state\}\}">V</figure-callout>}}_1}{2\mathrm{\&pi;}}(p_1-p_0)$

The drag torque that variable parts 31 produce is:

${\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="A2009100184200013H1.png"\; state="\{\{state\}\}">T</figure-callout>}}_2=-\frac{{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="A2009100184200013H1.png"\; state="\{\{state\}\}">V</figure-callout>}}_2}{2\mathrm{\&pi;}}(p_2-p_0)$

In the formula: V ₁, V ₂Be the discharge capacity of quantitative part 30, variable parts 31, p ₁, p ₂Be the pressure of hydraulic transformer into and out of oil port, p ₀Be the pressure at fuel tank place, common p ₀=0.

Ignore the frictional resistance moment between quantitative part 30 and the variable parts 31, work as T ₁₊T ₂=0 o'clock, hydraulic transformer was in state of equilibrium, and this moment, hydraulic transformer into and out of the pressure ratio between the hydraulic fluid port was:

$\mathrm{\&lambda;}=\frac{p_2}{{\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="A2009100184200010H1.png,A2009100184200011H1.png"\; state="\{\{state\}\}">p</figure-callout>}}_1}=\frac{V_1}{V_2}---\left(1\right)$

In the formula: λ is a transformation ratio.

By above derivation as can be seen, transformation ratio is the ratio of hydraulic transformer inlet/outlet pressure, and it also equals the inverse ratio of corresponding discharge capacity.Here pressure p ₁Be the pressure of constant pressure network, it is a definite value, and pressure p ₂Depend on that due to load, therefore the transformation of the single-acting blade-type hydraulic transformer of described a kind of manual control comes down to regulate discharge capacity V ₁/ V ₂Value because the discharge capacity V of quantitative part 30 ₁Be a fixed value, so be discharge capacity V in the work by Moderator Variable parts 31 ₂Satisfy the needs of load variations.

When the single-acting blade-type hydraulic transformer of described a kind of manual control is not worked, the equal transfixion of rotor of quantitative part 30 and variable parts 31, the transformer output flow is zero, the stator 10 of variable parts 31 can be in except that initial position (at this moment, the center of rotor 9 overlaps with the center of stator 10, and throw of eccentric is zero) outer arbitrary position.

When the single-acting blade-type hydraulic transformer of described a kind of manual control is worked, for adapting to the variation of load, rotating eccentricity is adjusted screw 28, and the stator 10 of variable parts 31 can move to the left or to the right, rotor 9 constantly changes the discharge capacity V of variable parts 31 with the size and Orientation of the throw of eccentric of stator 10 ₂Also constantly change, by formula (1) as can be known, transformation ratio λ just changes thereupon, realizes transformation, satisfies the needs of load variations.

The rotor 9 of the variable parts 31 of the single-acting blade-type hydraulic transformer of described a kind of manual control and the displacement decision by variable piston 26 when working of the size and Orientation of the throw of eccentric of stator 10, the displacement of variable piston 26 is adjusted screw 28 controls by off-centre, adjust screw 28, the displacement of adjustable variables plunger 26 (size and Orientation) by rotating eccentricity.

Claims (5)

1, a kind of single-acting blade-type hydraulic transformer of manual control comprises housing (1), left end cap (2), running shaft (3), thrust plate (4,7,8,15), rotor (5,9), stator (6,10), press table (14), roller (13), top board (12), upper end cap (11), right end cap (16), wedge shaped plate (17), blade (18,25), left cover (19), pretightening force is adjusted screw (20), the eccentric screw (28) of adjusting, nut (21,27), spring seat (22), preloading spring (23), slide (24), variable piston (26), right cover plate (29); It is characterized in that, the center of the center of rotor (5) and stator (6) is all fixed, the center of rotor (5) does not overlap with the center of stator (6), certain throw of eccentric is arranged, wedge shaped plate (17) left surface contacts with the cooperation of housing (1) internal surface, wedge shaped plate (17) right flank contacts with the cooperation of stator (6) outer surface, the width of rotor (5) is slightly littler than the width of stator (6), rotor (5) is installed in the stator (6), one end of blade (18) is put into the blade groove of rotor (5), the other end of blade (18) contacts with the internal surface of stator (6), blade (18) is radially settled along rotor (5), thrust plate (4,7) be installed on the running shaft (3), and be pressed on stator (6) about on two sides, rotor (5) cooperates connection with the left half axle of running shaft (3) by flat key; The center of rotor (9) is fixed, the center of stator (10) can be in the left side or the right side at rotor (9) center, the width of rotor (9) is slightly littler than the width of stator (10), rotor (9) is installed in the stator (10), one end of blade (25) is put into the blade groove of rotor (9), the other end of blade (25) contacts with the internal surface of stator (10), blade (25) is radially settled along rotor (9), rotor (9) cooperates connection with the right axle shaft of running shaft (3) by flat key, the left end of variable piston (26) contacts with the right surface of stator (10), the right-hand member of variable piston (26) contacts with the eccentric left end head of adjusting screw (28), variable piston (26) is installed in the housing (1), the eccentric screw (28) of adjusting is installed in the right cover plate (29), and be fastened on the right cover plate (29) by nut (27), right cover plate (29) is installed on the housing (1) by bolt, the right-hand member of slide (24) contacts with the left surface of stator (10), slide (24) is installed in the housing (1), one end of preloading spring (23) is put into slide (24), the other end of preloading spring (23) is placed on the spring seat (22), spring seat (22) contacts with the right-hand member head that pretightening force is adjusted screw (20), pretightening force is adjusted screw (20) and is installed in the left cover (19), and be fastened on the left cover (19) by nut (21), left cover (19) is installed on the housing (1) by bolt, upper end cap (11) is by being bolted on the housing (1), top board (12) by Bolt Connection on upper end cap (11), press table (14) contacts with the outer surface cooperation of stator (10), roller (13) is installed between top board (12) and the press table (14), roller (13) contacts with the lower surface of top board (12) and the upper surface cooperation of press table (14), thrust plate (8,15) be installed on the running shaft (3), and be pressed on stator (10) about on two sides; The left and right two ends of running shaft (3) are installed on left end cap (2) and the right end cap (16) by sliding bearing, and right end cap (16), left end cap (2) are by being bolted on the housing (1).

2, the single-acting blade-type hydraulic transformer of a kind of manual control according to claim 1 is characterized in that, when the center of rotor (9) overlapped with the center of stator (10), preloading spring (23) had a certain size pretightening force.

3, the single-acting blade-type hydraulic transformer of a kind of manual control according to claim 1, it is characterized in that, upper left hydraulic fluid port (M) is a kind of filler opening of single-acting blade-type hydraulic transformer of manual control, filler opening (M) is connected with the high voltage terminal of constant pressure network system, upper right hydraulic fluid port (N) is a kind of oil outlet of single-acting blade-type hydraulic transformer of manual control, oil outlet (N) is connected with load end, following hydraulic fluid port (O) is an a kind of hydraulic fluid port of single-acting blade-type hydraulic transformer of manual control, and hydraulic fluid port (O) is connected with fuel tank.

4, the single-acting blade-type hydraulic transformer of a kind of manual control according to claim 3 is characterized in that, filler opening (M) is identical with oil outlet (N) size.

5, the single-acting blade-type hydraulic transformer of a kind of manual control according to claim 3 is characterized in that, hydraulic fluid port (O) is greater than filler opening (M) and oil outlet (N).

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