CN101666337B - 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 by flat 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 in hydraulic transmission, realizing the pressure conversion.Hydraulic transformer can convert the input hydraulic pressure under the setting pressure under the another kind of pressure output hydraulic pressure ability 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, and its working pressure is high, more than 20MPa; Range of flow is big, generally is used for high pressure, high-volume hydraulic system, in, use in the low-pressure hydraulic system; Efficient is very low, and the plunger hydraulic transformer device structure is complicated, machining accuracy is high, and is responsive to oil pollution; The oil strain required precision is high, and price is expensive, therefore makes the application area of hydraulic transformer receive very big restriction.

(3) summary of the invention

Technical assignment of the present invention is the deficiency to existing technology; 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 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 adjustment screw, eccentric adjustment 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, and centre of rotor does not overlap with the center of stator, and certain throw of eccentric is arranged; The wedge shaped plate left surface contacts with the shell inner surface cooperation, and the wedge shaped plate right flank contacts with the stator outer surface cooperation, and the width of rotor is slightly littler than the width of stator; Rotor is installed in the stator, and an end of blade is put into the blade groove of rotor, and the other end contacts with inner surface of stator; Blade is settled along rotor radial; 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 through flat key.The center of another group rotor is fixed, and the center of stator can be in the left side or the right side of rotor center, and the width of rotor is slightly littler than the width of stator; Rotor is installed in the stator, and an end of blade is put into the blade groove of rotor, and 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 through flat key, and the left end of variable piston contacts with the right surface of stator, and the right-hand member of variable piston contacts with the left end head of an eccentric adjustment screw; Variable piston is installed in the housing; Eccentric adjustment screw is installed in the right cover plate, and is fastened on the right cover plate through a nut, and right cover plate is installed on the housing through bolt; The right-hand member of slide contacts with the left surface of stator; Slide is installed in the housing, and an end of preloading spring is put into slide, and the other end of preloading spring is placed on the spring seat; Spring seat contacts with the right-hand member head of pretightening force adjustment screw; Pretightening force adjustment screw is installed in the left cover, and is fastened on the left cover through another nut, and left cover is installed on the housing through bolt; Preloading spring had a certain size pretightening force when centre of rotor overlapped with the center of stator; Upper end cap is through being bolted on the housing; Top board passes through Bolt Connection on upper end cap; Press table contacts with the stator external surface cooperation, and roller is installed between top board and the press table, and 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 through sliding bearing, and right end cap, left end cap are through 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 the arbitrary value in the induced pressure excursion with the constant pressure network system pressure with 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

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

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, the 7. first assembly flow table, 5. the first rotor, 6. first stator; 8,15. second assembly flow tables, 9. second rotor, 10. second stator, 11. upper end caps, 12. top boards; 13. roller, 14. press tables, 16. right end caps, 17. wedge shaped plates, 18. first groups of blades; 19. left cover, 20. pretightening forces adjustment screw, 28. eccentric adjustment screws, 21,27. nuts, 22. spring seats; 23. preloading spring, 24. slides, 25. second groups of blades, 26. variable pistons, 29. right cover plates

(5) embodiment

Explanation at length below below in conjunction with accompanying drawing and embodiment the present invention being done.

Like Fig. 1,2, shown in 3, the single-acting blade-type hydraulic transformer of a kind of manual control of the present invention mainly is made up of housing 1, left end cap 2, running shaft 3, the first assembly flow table 4,7 and the first rotor 5, first stator 6, the second assembly flow table 8,15 and second rotor 9, second stator 10, 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 adjustment screw 20, eccentric adjustment screw 28, nut 21,27 and spring seat 22, preloading spring 23, slide 24, variable piston 26, right cover plate 29, first group of blade 18, second group of blade 25 etc.; The center of the center of the first rotor 5 and first stator 6 is all fixed, and the center of the first rotor 5 does not overlap with the center of first stator 6, and 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 first stator, 6 outer surfaces, and the width of the first rotor 5 is slightly littler than the width of first stator 6, and the first rotor 5 is installed in first stator 6; One end of first group of blade 18 is put into the blade groove of the first rotor 5; The other end of first group of blade 18 contacts with the internal surface of first stator 6, and first group of blade 18 radially settled (being that laying angle is zero) along the first rotor 5, and the first assembly flow table 4,7 is installed on the running shaft 3; And be pressed on first stator 6 about on two sides; The first rotor 5 cooperates connection with the left half axle of running shaft 3 through flat key, under the effect of constant pressure network system mesohigh oil, but 3 rotations of the first rotor 5 driven rotary axles; The center of second rotor 9 is fixed, and the center of second stator 10 can be moved to the left or to the right, and the center of second stator 10 can be in the left side or the right side at second rotor, 9 centers; The width of second rotor 9 is slightly littler than the width of second stator 10; Second rotor 9 is installed in second stator 10, and an end of second group of blade 25 is put into the blade groove of second rotor 9, and the other end of second group of blade 25 contacts with the internal surface of second stator 10; Second group of blade 25 radially settled along second rotor 9; Second rotor 9 cooperates connection with the right axle shaft of running shaft 3 through flat key, drives 9 rotations of second rotor, pressure oil output by running shaft 3; The left end of variable piston 26 contacts with the right surface of second stator 10, and the right-hand member of variable piston 26 contacts with the left end head of eccentric adjustment screw 28, and variable piston 26 is installed in the housing 1; Eccentric adjustment screw 28 is installed in the right cover plate 29, and is fastened on the right cover plate 29 through nut 27, and right cover plate 29 is installed on the housing 1 through bolt; Can drive variable piston 26 move left and right through rotating eccentricity adjustment screw 28, the right-hand member of slide 24 contacts with the left surface of second stator 10, and 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, and spring seat 22 contacts with the right-hand member head of pretightening force adjustment screw 20, and pretightening force adjustment screw 20 is installed in the left cover 19; And be fastened on the left cover 19 through nut 21; Left cover 19 is installed on the housing 1 through bolt, adjusts the pretightening force that screw 20 can be adjusted preloading spring 23 through the rotation pretightening force, when not working; The center of second rotor 9 overlaps (this position is called initial position) with the center of second stator 10; This moment, preloading spring 23 had a certain size pretightening force, during work, clockwise or be rotated counterclockwise eccentric adjustment screw 28 and can drive variable piston 26 and move to the left or to the right; Move to the left or to the right thereby drive second stator 10, the size and Orientation that changes second rotor 9 and second stator, 10 throw of eccentric is realized variable; Upper end cap 11 is through being bolted on the housing 1; On upper end cap 11, press table 14 contacts with the outer surface cooperation of second stator 10 top board 12 through Bolt Connection, and 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 second stator, 10 move left and right, and the second assembly flow table 8,15 is installed on the running shaft 3, and be pressed on second 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 through sliding bearing, and right end cap 16, left end cap 2 are through being bolted on the housing 1.

Form quantitative part 30 by running shaft 3, wedge shaped plate 17, the first rotor 5, first stator 6, first group of blade 18 and the first assembly flow table 4,7 etc., by running shaft 3, second rotor 9, second stator 10, second group of blade 25, left cover 19, right cover plate 29, pretightening force adjustment screw 20, eccentric adjustment screw 28, nut 21,27 and 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 the second assembly flow table 8,15; 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, and filler opening M is connected with the high voltage terminal of constant pressure network system, and 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, and the following hydraulic fluid port of quantitative part 30 and the following hydraulic fluid port of variable parts 31 link together, and becomes 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, and the 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:

${\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="H2009100184201E00021.png"\; state="\{\{state\}\}">T</figure-callout>}}_1=\frac{{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="H2009100184201E00021.png"\; state="\{\{state\}\}">V</figure-callout>}}_1}{2\mathrm{\&pi;}}(p_1-p_0)$

The drag torque that variable parts 31 produce is:

$T_2=-\frac{V_2}{2\mathrm{\&pi;}}(p_2-p_0)$

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:

$\mathrm{\&lambda;}=\frac{p_2}{{\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="H2009100184201E00021.png"\; state="\{\{state\}\}">p</figure-callout>}}_1}=\frac{V_1}{V_2}---\left(1\right)$

In the formula: λ is a transformation ratio.

Can be found out that by above derivation transformation ratio is the ratio of hydraulic transformer inlet/outlet pressure, 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 through 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 first rotor 5 of quantitative part 30 and second rotor, the 9 equal transfixions of variable parts 31; The transformer output flow is zero; Second stator 10 of variable parts 31 can be in except that the outer arbitrary position of initial position (at this moment, the center of second rotor 9 overlaps with the center of second stator 10, and throw of eccentric is zero).

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 adjustment screw 28; Second stator 10 of variable parts 31 can move to the left or to the right, and the size and Orientation of the throw of eccentric of second rotor 9 and second stator 10 constantly changes, the discharge capacity V of variable parts 31 ₂Also constantly change, can be known by formula (1), transformation ratio λ just changes thereupon, realizes transformation, satisfies the needs of load variations.

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

Claims (2)

1. a single-acting blade-type hydraulic transformer of manually controlling comprises housing (1), left end cap (2), running shaft (3), the first assembly flow table (4,7), the first rotor (5), first stator (6), the second assembly flow table (8,15), second rotor (9), second stator (10), press table (14), roller (13), top board (12), upper end cap (11), right end cap (16), wedge shaped plate (17), first group of blade (18), left cover (19), pretightening force adjustment screw (20), eccentric adjustment screw (28), nut (21,27), spring seat (22), preloading spring (23), slide (24), second group of blade (25), variable piston (26), right cover plate (29); It is characterized in that; The center of the center of the first rotor (5) and first stator (6) is all fixed, and the center of the first rotor (5) does not overlap with the center of first stator (6), and 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 first stator (6) outer surface, and the width of the first rotor (5) is slightly littler than the width of first stator (6), and the first rotor (5) is installed in first stator (6); One end of first group of blade (18) is put into the blade groove of the first rotor (5); The other end of first group of blade (18) contacts with the internal surface of first stator (6), and first group of blade (18) radially settled along the first rotor (5), and the first assembly flow table (4,7) is installed on the running shaft (3); And be pressed on first stator (6) about on two sides, the first rotor (5) cooperates connection with the left half axle of running shaft (3) through flat key; The center of second rotor (9) is fixed, and the center of second stator (10) can be in the left side or the right side at second rotor (9) center, and the width of second rotor (9) is slightly littler than the width of second stator (10); Second rotor (9) is installed in second stator (10), and an end of second group of blade (25) is put into the blade groove of second rotor (9), and the other end of second group of blade (25) contacts with the internal surface of second stator (10); Second group of blade (25) radially settled along second rotor (9), and second rotor (9) cooperates connection with the right axle shaft of running shaft (3) through flat key, and the left end of variable piston (26) contacts with the right surface of second stator (10); The right-hand member of variable piston (26) contacts with the left end head of eccentric adjustment screw (28); Variable piston (26) is installed in the housing (1), and eccentric adjustment screw (28) is installed in the right cover plate (29), and is fastened on the right cover plate (29) through nut (27); Right cover plate (29) is installed on the housing (1) through bolt; The right-hand member of slide (24) contacts with the left surface of second stator (10), and slide (24) is installed in the housing (1), and an 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 of pretightening force adjustment screw (20), and pretightening force adjustment screw (20) is installed in the left cover (19), and is fastened on the left cover (19) through nut (21); Left cover (19) is installed on the housing (1) through bolt; Upper end cap (11) is through being bolted on the housing (1), and on upper end cap (11), press table (14) contacts with the outer surface cooperation of second stator (10) top board (12) through Bolt Connection; Roller (13) is installed between top board (12) and the press table (14); The lower surface of roller (13) and top board (12) and the upper surface of press table (14) cooperate and contact, and the second assembly flow table (8,15) is installed on the running shaft (3), and be pressed on second 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) through sliding bearing, and right end cap (16), left end cap (2) are through being bolted on the housing (1); The left half axle of running shaft (3), the first assembly flow table (4,7), the first rotor (5), first stator (6), wedge shaped plate (17), first group of blade (18) are formed quantitative part (30); 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 right axle shaft of running shaft (3), the second assembly flow table (8,15), second rotor (9), second stator (10), press table (14), roller (13), top board (12), upper end cap (11), left cover (19), pretightening force adjustment screw (20), eccentric adjustment screw (28), nut (21,27), spring seat (22), preloading spring (23), slide (24), second group of blade (25), variable piston (26), right cover plate (29) composition variable parts (31); 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; Along by the direction of hydraulic transformer filler opening (M) to oil outlet (N); Quantitative part (30) is positioned on the left half axle of running shaft (3), and variable parts (31) are positioned on the right axle shaft of running shaft (3).

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 second rotor (9) overlapped with the center of second stator (10), preloading spring (23) had a certain size pretightening force.

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