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Kawasaki 30-02 KR3-2 n regulator using and maintenance

1. The model said

2. Specification
Oil action……………………………… Wear-resistant hydraulic oil ISO VG 32,46,68
Temperature range………………………………… – 20 ~ 90 ℃
Viscosity range…………………………… 10 ~ 1000 CST (formal operation, 10 ~ 200 CST)

3. Summary
Kawasaki inclined plate axial piston pump K3V series with regulator KR3 2 n * * * – consists of the following control mechanism.
(1) power control
With their own out of piston pump pressure P1 and the other out of piston pump pressure P2 rise, make the living
Condition.the slope Angle (spit out traffic) automatically reduce, input torque control under a certain value (rotational speed
Must also keep certain input power).
According to the two series double piston pump piston pump load pressure combined to run, use at the same time
At full capacity. So in practice the horsepower control state, the control of each piston pump regulator to make it
At the same dip Angle (spit out traffic). No matter how two piston pump load changes, the institution always
Can automatically prevent the motor of the overload operation.

(2) flow control
Change the pilot pressure Pi, can be arbitrary control Angle of piston pump (flow).
The regulator works for, along with the increasing pressure on Pi and spit out flow Q reduce negative flow
Control (negative control). The agency can flow direction are given corresponding homework necessary pressure directive, live
Pump only spit out the necessary flow, power consumption so that it can’t be made in vain.
The regulator has two or more control, while complex control of use, according to the above machinery
Type of calculus, low tilt (low flow) instruction operation is preferred.

4. Action
4-1 flow control
As shown in the picture on the right, with the change of the pilot pressure Pi, can be arbitrary control piston pump out flow.

The 4-1-1 reduced flow of action
When the pilot pressure rise in Pi, the guide piston (643) to the right, when the guide spring (646)
Pressure and hydraulic pressure in the static equilibrium position. Leads to the combination of the piston groove [A part]
2 (613) fixed on the connecting rod are embedded on the pin on the (875), so as the guide piston to move
2 at point B, connecting rod [by the pivot pin (614), pin (875) fixed] as a pivot turn.
Connecting rod 2 big holes of a/C of feedback because there is a fixed in prominent on the connecting rod (611)
Connecting rod pin (897), so when 2 turns, pin (897) to the right. Feedback of connecting rod
Face painting department department [D] the chimeric fixed in oblique pin (531) (oblique pin oblique plate moved)
Pin (548). So when the pin (897) moves, feedback connecting rod for the fulcrum to point D
Move. Because feedback through connecting rod pin (874) with a short tube (652) connected together, so
Spool moves to the right.
When the short tube, spit out pressure P1 through short pipe after Cl is led to the big of the servo piston
Diameter. While in servo live small department often were introduced to spit out pressure P1, due to the area
Errand servo piston moves to the right, and cut slope Angle.
Servo piston moves to the right, the point D is to the right. Because of the short tube with a reset spring
(654), produces a tensile strength of the spool has moved to the left. So the pin (897) was the even harder
Pole 2 big holes of [C]. Therefore with the moving of the point D, feedback connecting rod with a fulcrum of C
Turning, spool moves to the left. The mobile to make short sleeve (651) and opening of the tube (652)
Gradually closed, until completely closed, servo piston static movement.

The 4-1-2 traffic increase
When the pilot pressure Pi falls, as a result of the stress orientation spring (646) make the guide piston (643)
Move to the left, connecting rod 2 (613) to point B as a pivot turn. Pin (897) through the spool
(652), pin (652), feedback the connecting rod (611) are reset spring (654) to the connecting rod
2 big holes of [C], therefore, as the rotation of connecting rod 2 feedback for the connecting rod to point D
Turn point, spool moves to the left.
When short tube, C ℓ tube to open tank, large diameter of servo piston pressure decreases. Due to the
By the small diameter of spit out pressure P1, servo piston moves to the left, flow rate increases.
As the servo piston movement, D point is moving to the left, turn feedback connecting rod with a fulcrum of C,
Spool moves to the right. The mobile to repeatedly, until the opening of the sleeve and spool closing, and
Static movement in closed position.
4-2Power control

When pressure load, reduce the tilt Angle of piston pump, prevent overload of motor. Because of the regulator adopts synchronous full capacity control
, as shown in the way, so the following formula to control two Angle of piston pump pressure (volume), equal to Q.

 

Tin = p * q / 2 p + P2 * q / 2 p = (P1 + P2) * q / 2 p
Horsepower control action as well as flow control, the following simple instructions.
(action details about each product, please refer to the flow control.)

The 4-2-1 prevent overload operation
When the piston pump to a spit out pressure P1, or each other out of piston pump pressure P2 rises,
P1 and P2 will effect to the compensation period of difference of the piston (621), push rod (623) to the right to compensation, straight
To the external spring (625), the internal spring (626) elastic stops with hydraulic pressure balance position
Stop moving. Compensation lever movement through the pin (875) to convey connecting rod 1, connecting rod 1 to fixed
In the pump housing (601) on the pin (875) [E] as the center. Big hole of connecting rod 1 / F
Department] have a fixed in the feedback on the connecting rod (611) highlight the pin (897), with the connecting rod 1
Rotation, feedback on connecting rod with a pivot turn of D, short tube (652) to the right. And spit
The flow Q decreases the negative flow control (negative control)
When the short tube, spit out pressure P1 through C ℓ tube was introduced into the large diameter of the servo piston units,
Servo piston moves to the right, out of piston pump flow decrease, in order to prevent the overload of the motor.
Convey the feedback servo piston movement through the point D connecting rod, the feedback link F turn point for protection,
Spool moves to the left. Short tube keep moving, until the sleeve (651) and the opening of the closed so far.
And on the peristome happens to shut down the location of the stop action.

The 4-2-1 prevent overload operation
When the piston pump to a spit out pressure P1, or each other out of piston pump pressure P2 rises,
P1 and P2 will effect to the compensation period of difference of the piston (621), push rod (623) to the right to compensation, straight
To the external spring (625), the internal spring (626) elastic stops with hydraulic pressure balance position
Stop moving. Compensation lever movement through the pin (875) to convey connecting rod 1, connecting rod 1 to fixed
In the pump housing (601) on the pin (875) [E] as the center. Big hole of connecting rod 1 / F
Department] have a fixed in the feedback on the connecting rod (611) highlight the pin (897), with the connecting rod 1
Rotation, feedback on connecting rod with a pivot turn of D, short tube (652) to the right. And spit
The flow Q decreases the negative flow control (negative control)
When the short tube, spit out pressure P1 through C ℓ tube was introduced into the large diameter of the servo piston units,
Servo piston moves to the right, out of piston pump flow decrease, in order to prevent the overload of the motor.
Convey the feedback servo piston movement through the point D connecting rod, the feedback link F turn point for protection,
Spool moves to the left. Short tube keep moving, until the sleeve (651) and the opening of the closed so far.
And on the peristome happens to shut down the location of the stop action.

5. The adjustment of the regulator
Way the regulator can adjust the screw can adjust the maximum flow and minimum flow, power control, flow control characteristics. (see attached list for the adjusting volume 1)

5-1 of the maximum flow adjustment
Loosen the hexagon nut (808), tighten
(or loosen) retaining screw (954)
To adjust. Other control features
Remains the same. Only change the maximum flow.

5-2 minimum flow adjustment
Loosen the hexagon nut (808), tighten (or loosen) inner hexagon set screws (953) to adjust. As well as the maximum flow adjustment, other control features remains the same. , but should pay attention to such as Q if pull too tightly, the biggest spit out pressure (overflow), may need to increase power.
5-3The adjustment of the minimum flow

Loosen the hexagon nut (808), tighten (or loosen) inner hexagon set screws (953) to adjust. With the largest
Flow rate adjustment, other control features remains the same. , but should pay attention to such as Q if pull too tightly, the biggest spit out pressure (overflow), may need to increase power.

5-3 input horsepower
The regulator by using the synchronous way, so at the time of change power set, will be
Rear front piston pump, piston pump adjustment screws for the same amount. And according to the adjustment,
Pressure change values for the two piston pump booster at the same time.

Related files:

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