Synchronous gear motor DFMN-304A-19M
Synchronous gear motor DFMN-302A-8M DFMN-303A-14M DFM-302A-4M DFM-302A-6M
Gear motor DFM-302A-11R DFM-302A-13M DFM-302A-17M DFM-302A-19M DFM-302A-23M
Synchronous gear divider DFM-302A-25M DFM-302A-28M DFM-302A-30M DFM-302A-35M
Synchronous gear motor DFMN-302A-8M DFMN-303A-14M DFMN-302A-4M DFMN-302A-6M
Gear motor DFMN-302A-11R DFMN-302A-13M DFMN-302A-17M DFMN-302A-19M DFMN-302A-23M
Synchronous gear divider DFMN-302A-25M DFMN-302A-28M DFMN-302A-30M DFMN-302A-35M
Hydraulic synchronous motor is also called synchronous shunt motor, hydraulic synchronous shunt. The geared synchronous shunt motor in the hydraulic synchronous motor is the most widely used synchronous shunt element in the synchronous motor, according to whether the overflow valve can be divided into with valve and without valve, according to the size of its flow can be divided into cast iron gear shunt motor and aluminum alloy gear shunt motor. At present, the most widely used aluminum alloy gear synchronous shunt motor with medium and small displacement.
For the gear synchronous shunt motor, its synchronization performance mainly depends on the following parameters:
(1) load balancing
(2) temperature and viscosity of the medium
(3) system pressure level
(4) speed of the shunt motor
(5) continuity of flow
In order to achieve high synchronization performance, the following requirements are recommended for design:
(1) the speed of gear diverter motor shall not be lower than 1000rpm
(2) the load of all jacking cylinders shall be as uniform as possible
(3) at a certain constant temperature and operating pressure range of 100bar~210bar, the medium viscosity is guaranteed to be around 40cSt
The following synchronization accuracy shall be referred to in the preliminary design:
(1)± 1.5% ~ ± 2.5% aluminum alloy gear synchronous shunt motor
(2)± 2.5% ~ ± 3.5% for cast iron gear synchronous splitter motor
Internal pressure drop
For gear shunt motor, import and export pressure loss Δ p about 10 ~ 12 bar. However, in actual use, the pressure loss may be higher than the above reference value due to the influence of pressure, flow and medium viscosity.
Minimum flow
For our gear splitter motor, the minimum flow per chip can be calculated at 400rpm. However, in order to achieve high synchronization accuracy, we recommend a minimum design of 1000rpm. At the same time, refer to the "technical parameters" in each piece of flow range.
Minimum and maximum speed range
For aluminum alloy gear splitter motors, the recommended speed range: 700rpm ~ 2300rpm
For cast-iron gear split motors, the recommended speed range is not less than 1000rpm
The noise level
For gear diverters, when the speed exceeds 1800r/min, there will be a lot of noise, which is unacceptable. Therefore, it is necessary to choose the discharge rate of the shunt reasonably in the design.
Elimination of synchronization errors
As an independent flow control element, gear diverter has no direct measurement method for the inevitable synchronization error. Therefore, the synchronization error can only be adjusted when the hydraulic cylinder reaches the end of the journey. The following figure is a typical application loop of gear diverter: