CN101666338A - Electrically controlled blade-type hydraulic transformer - Google Patents

Abstract

The invention relates to an electrically controlled blade-type hydraulic transformer, comprising a shell, a rotating shaft, a left end cap, a valve plate, stators, rotors, a right end cap, a gear wheel, blades, a variable piston, a motor, 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 superposed; the centers of the other group of rotors are fixed, the center of the stator can be moved leftwards and rightwards; the blades are arranged along the radial direction of the rotors; one rotor is matchedand connected with the left half shaft of the rotating shaft by a spline, and the other rotor is matched and connected with the right half shaft of the rotating shaft by a flat key; adopting the center of a long radius circular arc as a center, one stator outer ring is manufactured into the form of the gear wheel in the range of 150 degrees and then is matched with the gear wheel to form a gear drive pair, and the external surface of the other stator is fixed with the right end head of a piston rod of the variable piston; 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 of the rotating shaft is installed on the valve plate on the left side, the right end of the rotating shaft is installed on the right end cap, and the left end cap and the right end cap are fixed on the shell by bolts.

Description

Electrically controlled blade-type hydraulic transformer

(1) technical field

The present invention relates to a kind of hydraulic transformer, specifically a kind of electrically controlled blade-type hydraulic transformer 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 and steady, one end can be used for middle and high hydraulic fluid pressing system, the other end can be used for the blade type hydraulic transformer of low-pressure hydraulic system, to solve the much smaller problem of load end pressure ratio fuel feeding constant pressure network system pressure, improve the working efficiency of hydraulic system, thereby enlarged the application area of hydraulic transformer, enriched the kind of hydraulic transformer.

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

A kind of electrically controlled blade-type hydraulic transformer comprises housing, running shaft, left end cap, thrust plate, stator, rotor, right end cap, gear, blade, variable piston and motor etc.; The center of one group rotor and stator is fixing and overlaps, 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 by spline with the left half axle of running shaft, the stator outer ring is to make gear forms in the 150 ° of scopes in center with semi major axis center of arc, stator and gear constitute gear driving pair, and gear is installed on the output shaft of motor, and motor is installed on the housing, thrust plate is installed on the running shaft, and be pressed on stator about on two sides; 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 by flat key with the right axle shaft of running shaft, the piston rod right-hand member head and the stator external surface of variable piston are fixed together, the housing of variable piston is to be processed on the housing of hydraulic transformer, the variable piston, variable cylinder cover and housing constitute the variable oil cylinder, and the variable cylinder cover is by being bolted on the housing, and 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, 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 is pressed on two sides of stator; The running shaft left half axle is made spline for one section, the running shaft right axle shaft is made flat key for one section, the left end of running shaft is installed on the thrust plate of left side by sliding bearing, and the right-hand member of running shaft is installed on the right end cap by sliding bearing, and left end cap, right end cap are by being bolted on the housing.

Electrically controlled blade-type hydraulic transformer 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's one end can be used for middle and high hydraulic fluid pressing system, the other end can be used for the blade type hydraulic transformer of low-pressure hydraulic system, solved the much smaller problem of load end pressure ratio fuel feeding constant pressure network system pressure, improved the working efficiency of hydraulic system, enlarge the application area of hydraulic transformer, enriched the kind of hydraulic transformer.

(3) volume of the present invention is little, in light weight, rotary inertia is little, and control is convenient, is easy to realize accurate control, and control performance is good.

(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 C-C view of the present invention

Fig. 5 is a hydraulic fluid port Connecting format schematic representation of the present invention

Fig. 6 is a transformation principle schematic of the present invention

Among the figure: 1. housing, 2. running shaft, 3. left end cap, 4,7,8,15. thrust plates, 5,13. stators, 6,14. rotors, 9. upper end cap, 10. top board, 11. rollers, 12. press tables, 16. right end caps, 17. gear, 18,21. blades, 19. variable pistons, 20. variable cylinder covers, 22. motors

(5) embodiment

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

Shown in Fig. 1,2,3,4, electrically controlled blade-type hydraulic transformer of the present invention mainly is made up of housing 1, running shaft 2, left end cap 3, thrust plate 4,7,8,15 and stator 5,13 and rotor 6,14 and upper end cap 9, top board 10, roller 11, press table 12, right end cap 16, gear 17, blade 18,21 and variable piston 19, variable cylinder cover 20, motor 22 etc.; The center of rotor 6 and stator 5 is fixing and overlaps, the width of rotor 6 is slightly littler than the width of stator 5, rotor 6 is installed in the stator 5, one end of blade 18 is put into the blade groove of rotor 6, the other end contacts with the internal surface of stator 5, and blade 18 is radially settled (being that laying angle is zero) along rotor 6, and rotor 6 cooperates connection by spline with the left half axle of running shaft 2, under the effect of constant pressure network system mesohigh oil, but 2 rotations of rotor 6 driven rotary axles; Stator 5 outer rings are to make gear forms in the 150 ° of scopes in center with semi major axis center of arc, stator 5 constitutes gear driving pair with gear 17, stator 5 clockwise or be rotated counterclockwise and carry out variable under the drive of motor 22, gear 17 is installed on the output shaft of motor 22, motor 22 is installed on the housing 1, thrust plate 4,7 is installed on the running shaft 2, and be pressed on stator 5 about on two sides; The center of rotor 14 is fixed, but the center move left and right of stator 13, and stator 13 centers can be in the left side or the right side at rotor 14 centers; The width of rotor 14 is slightly littler than the width of stator 13, rotor 14 is installed in the stator 13, and an end of blade 21 is put into the blade groove of rotor 14, and the other end contacts with the internal surface of stator 13, blade 21 is radially settled along rotor 14, and rotor 14 cooperates connection by flat key with the right axle shaft of running shaft 2; The piston rod right-hand member head of variable piston 19 and the outer surface of stator 13 are fixed together, the housing of variable piston 19 is processed on housing 1, variable piston 19, variable cylinder cover 20 and housing 1 constitute the variable oil cylinder, variable cylinder cover 20 is by being bolted on the housing 1, the piston rod of variable piston 19 can promote stator 13 move left and right, changes rotor 14 and can realize variable with the size and Orientation of the throw of eccentric of stator 13; Upper end cap 9 is by being bolted on the housing 1, top board 10 by Bolt Connection on upper end cap 9, press table 12 contacts with the outer surface cooperation of stator 13, roller 11 is installed between top board 10 and the press table 12, roller 11 contacts with the lower surface of top board 10 and the upper surface cooperation of press table 12, and press table 12 can be with stator 13 move left and right; Thrust plate 8,15 is installed on the running shaft 2, and be pressed on stator 13 about on two sides; Drive rotor 14 rotations, pressure oil output by running shaft 2; Running shaft 2 left half axles are made spline for one section, running shaft 2 right axle shafts are made flat key for one section, the left end of running shaft 2 is installed on the thrust plate 4 by sliding bearing, and the right-hand member of running shaft 2 is installed on the right end cap 16 by sliding bearing, and left end cap 3, right end cap 16 are by being bolted on the housing 1.

But by composition variable parts 23 such as running shaft 2, rotor 6, stator 5, gear 17, blade 18, motor 22, thrust plates 4,7, but by composition variable parts 24 such as running shaft 2, rotor 14, stator 13, variable piston 19, blade 21, thrust plates 8,15.The variable parts 23 of described electrically controlled blade-type hydraulic transformer and structure, the functional similarity of Double-action Vane Secondary Component, variable parts 23 can be seen a Double-action Vane Secondary Component as; The variable parts 24 of described electrically controlled blade-type hydraulic transformer and the structure of single-acting blade-type secondary component, functional similarity, variable parts 24 can be seen a single-acting blade-type secondary component as, so, described electrically controlled blade-type hydraulic transformer can be regarded as and formed by two secondary component coaxial rigid connection, as shown in Figure 5, the filler opening that the upper left hydraulic fluid port M of variable parts 23 is an electrically controlled blade-type hydraulic transformer, filler opening M is connected with the high voltage terminal of constant pressure network system, the oil outlet that the upper right hydraulic fluid port N of variable parts 24 is an electrically controlled blade-type hydraulic transformer, oil outlet N is connected with load end, filler opening M is greater than oil outlet N, the following hydraulic fluid port of variable parts 23 and the following hydraulic fluid port of variable parts 24 link together, become hydraulic fluid port O of electrically controlled blade-type hydraulic transformer, 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.

As shown in Figure 6, in the constant pressure network pressure p ₁Effect under, the active torque that variable parts 23 produce is:

${\mathrm{<figure-callout\; id="1"\; label="T"\; filenames="A2009100184230014H1.png"\; state="\{\{state\}\}">T</figure-callout>}}_1=\frac{{\mathrm{<figure-callout\; id="1"\; label="V"\; filenames="A2009100184230014H1.png"\; state="\{\{state\}\}">V</figure-callout>}}_1}{2\mathrm{\&pi;}}(p_1-p_0)$

The drag torque that variable parts 24 produce is:

${\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="A2009100184230009H1.png,A2009100184230010H1.png"\; state="\{\{state\}\}">T</figure-callout>}}_2=-\frac{{\mathrm{<figure-callout\; id="2"\; label="V"\; filenames="A2009100184230009H1.png,A2009100184230010H1.png"\; state="\{\{state\}\}">V</figure-callout>}}_2}{2\mathrm{\&pi;}}(p_2-p_0)$

In the formula: V ₁, V ₂Be the discharge capacity of variable parts 23, variable parts 24, 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 variable parts 23 and the variable parts 24, 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:

$\mathrm{\&lambda;}=\frac{p_2}{{\mathrm{<figure-callout\; id="1"\; label="p"\; filenames="A2009100184230014H1.png"\; state="\{\{state\}\}">p</figure-callout>}}_1}=\frac{V_1}{V_2}---\left(1\right)$

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 described electronic control difunctional vane type hydraulic transformer comes down to regulate discharge capacity V ₁/ V ₂Value, can distinguish in the work or the discharge capacity V of Moderator Variable parts 23 simultaneously ₁Or the discharge capacity V of variable parts 24 ₂Satisfy the needs of load variations.

When described electrically controlled blade-type hydraulic transformer is not worked, the equal transfixion of rotor of variable parts 23 and variable parts 24, the stator 5 of variable parts 23 is in initial rotational position (zero point), and the stator 13 of variable parts 24 can be in the arbitrary position except that zero point, the discharge capacity V of these variations per hour parts 23 ₁Be zero, the discharge capacity V of variable parts 24 ₂Non-vanishing, by formula (1) as can be known, transformation ratio λ equals zero.

During the work of described electrically controlled blade-type hydraulic transformer, for adapting to the variation of load, under the effect of motor, the stator of variable parts 23 clockwise or be rotated counterclockwise, along with the variation of stator angle of swing, the discharge capacity V of variable parts 23 ₁Also constantly change; Under the effect of variable piston, the stator 13 of variable parts 24 moves to the left or to the right, and rotor 14 constantly changes with the size and Orientation of the throw of eccentric of stator 13, along with the size and Orientation of throw of eccentric constantly changes the discharge capacity V of variable parts 24 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 size and Orientation of stator 5 angle of swing of the variable parts 23 of described electrically controlled blade-type hydraulic transformer is by the corner decision of motor (servomotor or stepping motor) output shaft, in the work, detect the corner of servomotor output shaft by angular displacement sensor, feed back to controller, send instruction by controller and give servomotor, control the angle of swing (size and Orientation) of stator 5, or send to the umber of pulse of stepping motor by controller control, control the angle of swing (size and Orientation) of stator 5; The rotor 14 of variable parts 24 and of the displacement decision of the size and Orientation of the throw of eccentric of stator 13 by variable piston 19, the displacement of variable piston 19 can be by electro-hydraulic servo (ratio) valve and position transducer control, in the work, displacement by position transducer detection variable piston 19, feed back to controller, send instruction by controller and give electro-hydraulic servo (ratio) valve, the displacement of Moderator Variable piston (size and Orientation).

Claims (5)

1, a kind of electrically controlled blade-type hydraulic transformer comprises housing (1), running shaft (2), left end cap (3), thrust plate (4,7,8,15), stator (5,13), rotor (6,14), upper end cap (9), top board (10), roller (11), press table (12), right end cap (16), gear (17), blade (18,21), variable piston (19), variable cylinder cover (20), motor (22); It is characterized in that, the center of rotor (6) and stator (5) is fixing and overlaps, the width of rotor (6) is slightly littler than the width of stator (5), rotor (6) is installed in the stator (5), one end of blade (18) is put into the blade groove of rotor (6), the other end of blade (18) contacts with the internal surface of stator (5), blade (18) is radially settled along rotor (6), rotor (6) cooperates connection by spline with the left half axle of running shaft (2), stator (5) outer ring is to make gear forms in the 150 ° of scopes in center with semi major axis center of arc, stator (5) constitutes gear driving pair with gear (17), gear (17) is installed on the output shaft of motor (22), motor (22) is installed on the housing (1), thrust plate (4,7) be installed on the running shaft (2), and be pressed on stator (5) about on two sides; The center of rotor (14) is fixed, the center of stator (13) can be in the left side or the right side at rotor (14) center, the width of rotor (14) is slightly littler than the width of stator (13), rotor (14) is installed in the stator (13), one end of blade (21) is put into the blade groove of rotor (14), the other end of blade (21) contacts with the internal surface of stator (13), and blade (21) is radially settled along rotor (14), and rotor (14) cooperates connection by flat key with the right axle shaft of running shaft (2); The outer surface of the piston rod right-hand member head of variable piston (19) and stator (13) is fixed together, the housing of variable piston (19) is processed on housing (1), variable piston (19), variable cylinder cover (20) and housing (1) constitute the variable oil cylinder, and variable cylinder cover (20) is by being bolted on the housing (1); Upper end cap (9) is by being bolted on the housing (1), top board (10) by Bolt Connection on upper end cap (9), press table (12) contacts with the outer surface cooperation of stator (13), roller (11) is installed between top board (10) and the press table (12), roller (11) contacts with the lower surface of top board (10) and the upper surface cooperation of press table (12), thrust plate (8,15) is installed on the running shaft (2), and be pressed on stator (13) about on two sides; Running shaft (2) left half axle is made spline for one section, running shaft (2) right axle shaft is made flat key for one section, the left end of running shaft (2) is installed on the thrust plate (4) by sliding bearing, the right-hand member of running shaft (2) is installed on the right end cap (16) by sliding bearing, and left end cap (3), right end cap (16) are by being bolted on the housing (1).

2, electrically controlled blade-type hydraulic transformer according to claim 1 is characterized in that, motor (22) is servomotor or stepping motor.

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

4, electronic control difunctional vane type hydraulic transformer according to claim 3 is characterized in that, filler opening (M) is greater than oil outlet (N).

5, electronic control difunctional vane type hydraulic transformer according to claim 3 is characterized in that, hydraulic fluid port (O) is greater than filler opening (M).

Images