Abstract： After the motor inside the hydraulic brake is powered on, it drives the
centrifugal oil pump inside the hydraulic brake head, increasing the hydraulic
oil pressure. Hydraulic oil transmits pressure to the piston in the oil
cylinder, and the hydraulic push rod moves upward under the drive of the piston,
opening the brake shoe. Technical data of hydraulic brake (taking MYTI-90
electric hydraulic thruster as an example): thrust of 900N, stroke of 80mm, rise
time of 0.8S, fall time of 0.5S, power of 0.25kW, equipped with No. 20 engine
oil, oil weight, 720 operations per hour, and matching brake model (thruster and
brake combined to form hydraulic brake). Due to the frequent combination of thrusters and brakes, this article
provides a comprehensive introduction to their installation, use, and
maintenance points: 1) When installing and fixing the brake, attention should be paid to
whether the brake shoes are parallel to the brake wheels when the brake is
released, and in the braking state, the entire surface of the brake band should
be attached to the brake wheels. The non parallelism and inclination within the
brake wheel width of 100mm in the released state should not exceed 0.1mm. The
working surface of the brake wheel should not have oil stains. 2) The brake is installed on the machine after the brake wheel is
installed. The brake wheel is dynamically and statically balanced, and its
surface roughness should not be lower than Ra1.6 and hardness should not be
lower than HBS=280. 3) Before testing, the explosion-proof electric hydraulic thruster should
inject clean and free of any contaminants or mechanical impurities into the
hydraulic oil cylinder. The type and quantity of oil used should meet the
specified requirements. 4) After connecting the power supply of the motor, check whether the
impeller rotates flexibly, whether the cylindrical spring is stuck, and whether
the push rod and piston move up and down normally. 5) Adjustment of the brake pad clearance of the brake. Due to the automatic
clearance adjustment capability of the brake, the clearance between the left
brake pad and the brake wheel remains constant as the brake band wears, but the
clearance between the right brake pad and the brake wheel gradually increases
with the wear of the brake band and needs to be adjusted as needed to maintain a
uniform clearance between the two brake pads. The installation gap between brake
pads and brake wheels is 0.6mm for brake wheels with a diameter of 150mm, 0.7mm
for brake wheels with a diameter of 200-300mm, and 0.8mm for brake wheels with a
diameter of 400-500mm. 6) Adjustment of braking torque. By adjusting the adjusting nut of the main
spring and changing the compression length of the main spring, the spring force
and braking torque can be adjusted to enable the brake to operate with the
smallest possible braking torque.
After the motor inside the hydraulic brake is powered on, it drives the
centrifugal oil pump inside the hydraulic brake head, increasing the hydraulic
oil pressure. Hydraulic oil transmits pressure to the piston in the oil
cylinder, and the hydraulic push rod moves upward under the drive of the piston,
opening the brake shoe. Technical data of hydraulic brake (taking MYTI-90
electric hydraulic thruster as an example): thrust of 900N, stroke of 80mm, rise
time of 0.8S, fall time of 0.5S, power of 0.25kW, equipped with No. 20 engine
oil, oil weight, 720 operations per hour, and matching brake model (thruster and
brake combined to form hydraulic brake).
Due to the frequent combination of thrusters and brakes, this article
provides a comprehensive introduction to their installation, use, and
maintenance points:
1) When installing and fixing the brake, attention should be paid to
whether the brake shoes are parallel to the brake wheels when the brake is
released, and in the braking state, the entire surface of the brake band should
be attached to the brake wheels. The non parallelism and inclination within the
brake wheel width of 100mm in the released state should not exceed 0.1mm. The
working surface of the brake wheel should not have oil stains.
2) The brake is installed on the machine after the brake wheel is
installed. The brake wheel is dynamically and statically balanced, and its
surface roughness should not be lower than Ra1.6 and hardness should not be
lower than HBS=280.
3) Before testing, the explosion-proof electric hydraulic thruster should
inject clean and free of any contaminants or mechanical impurities into the
hydraulic oil cylinder. The type and quantity of oil used should meet the
specified requirements.
4) After connecting the power supply of the motor, check whether the
impeller rotates flexibly, whether the cylindrical spring is stuck, and whether
the push rod and piston move up and down normally.
5) Adjustment of the brake pad clearance of the brake. Due to the automatic
clearance adjustment capability of the brake, the clearance between the left
brake pad and the brake wheel remains constant as the brake band wears, but the
clearance between the right brake pad and the brake wheel gradually increases
with the wear of the brake band and needs to be adjusted as needed to maintain a
uniform clearance between the two brake pads. The installation gap between brake
pads and brake wheels is 0.6mm for brake wheels with a diameter of 150mm, 0.7mm
for brake wheels with a diameter of 200-300mm, and 0.8mm for brake wheels with a
diameter of 400-500mm.
6) Adjustment of braking torque. By adjusting the adjusting nut of the main
spring and changing the compression length of the main spring, the spring force
and braking torque can be adjusted to enable the brake to operate with the
smallest possible braking torque.
