Can the gear oil pump be equipped with a 4 stage motor?

Of course, most of the motors on the general hydraulic system are four-stage (about 1440) rotation, and a few use six-stage motors (980 revolutions).

Under the condition that the pump displacement is determined, the faster the number of revolutions of the motor, the greater the flow rate of the pump per minute, and the faster the speed of the cylinder, (the speed of the cylinder depends on the flow rate, the higher the flow, the faster the speed).

Assuming that the displacement of the pump is 25 ml per revolution, with a four-stage motor 1440 rpm, his flow rate = 36 liters per minute, assuming that the piston of the cylinder is 125 mm, the speed of the cylinder = 295 cm per minute, the displacement of the pump is still 25, with the six-stage motor 980 rpm, his flow rate = 24 liters, the piston area is still 125 mm, his speed is about 196 cm per minute, the number of revolutions of the motor determines the flow rate of the system per minute, and the size of the flow determines the running speed of the cylinder.

It has nothing to do with the number of poles of the motor, as long as your motor output and installation meet the requirements.

Is your original factory equipped with 6 poles? If you want to change the 4 poles, you have to change to a pulley drive, and the pulley on the motor side should be smaller than the pulley on the gear pump side

Generally look at the final output speed, the low speed is the low noise. The speed of the 4-pole motor is 1450rpm, and the speed of the 6-pole motor is 960rpm. If there is no reducer, it should be a 6-pole motor with low noise.

Level 6 has low noise, but the flow rate is about 30% smaller.

I don't know what type of gear pump you choose?

You can check the hydraulic transmission manual, which indicates how much drive power to use, as long as you choose the speed motor that matches, if you are using a system pressure greater than 10MPa, you can choose a slightly higher power motor.

The same is true for the choice of multi-gang gear pumps.

Hehe, of course there is a difference, and it's big.

As for the power, I won't talk about it, obviously, the most important difference between a 4 and a 3kw is that the flow rate of the pump will change after changing the motor.

The speed of the 4-pole 4kw motor is about 1450 per minute.

The 6-pole 3kw speed is about 960 per minute, and the flow rate of the pump will change a lot.

The constant cutting of the rebar is not necessarily a problem of mismatch between the motor and the gear pump. It is estimated that the pressure of the system is low, and the relief valve can be adjusted to increase the system pressure if the pump allows.

Personal insights!

The gear pump is driven by a motor, and the pump will rotate with the motor. However, gear pumps are divided into internal and external meshing. Among them, the internal gear pump can work in both forward and reverse rotation, and can be used as a hydraulic motor. The external gear pump cannot be reversed, and it needs to be noted here.

Originally, the mecha gear was a mud-based (one-for-one) attack card set.,To some extent, the system is already very perfect.,If you add the same tune in, it feels like it's a little bit of a strong feeling to stuff it into = =.

It's my words, the strong plug will be under the effect of the occlusion After all, there are two uses, that is, it can be in tune and it can remove the effect of the opponent's monster.

Or get off the Karakuri, I once tried to play three "Karakuri Staff Officers 248" in a single order, and then with "The Price of Blood", three "Karakuri General No Zero" OTK opponents in one round

First of all, only the first to determine the pump and pressure to determine the power of the motor, his formula is, displacement * motor revolution = flow, flow * pressure 60 = motor power, for example, the pressure is 20 megapascals, the displacement is 25ml r, the motor is calculated according to the four-stage motor 1450 per minute, his flow is 25 * 1450 1000 = liters per minute).

Power = coefficient) = 12 kW motor, 12 kW motor can meet the maximum pressure of 20 megapascals, if the pressure used is sometimes overpressurized, you can choose a slightly larger motor than 12 kW,.

1. The speed of the two is different.

In principle, the main difference between the 2-stage motor and the 4-stage motor is the different speeds, that is, the synchronous speed of the 2-pole motor is 3000 rpm, while the synchronous speed of the 4-pole motor is 1500 rpm.

2. The number of pole pairs is different.

The number of pole pairs in the inner coil of the 2-stage motor and the 4-stage motor is also different, the 2-stage motor is a pair of magnetic poles, the synchronous speed of 1 pair of magnetic poles (2 poles) is 3000 rpm, and the asynchronous speed is about 2880 rpm; The 4-stage motor has 2 pairs of magnetic poles, and the synchronous speed of the 2 pairs of magnetic poles (4 magnetic poles) is 1500 rpm, and the asynchronous speed is about 1450 rpm.

To put it simply. The speed of the 2-stage motor is fast, 2850 3000 rpm. 4-stage motor 1400 1500 rpm.

It must be a quick earning.

Meet the starting torque, which can be replaced.

The speed is not the same to meet the starting torque, which can be replaced.

It's just a difference in speed.

The 2-pole asynchronous motor is close to 3,000 revolutions per minute.

The 4-pole asynchronous motor is close to 1500 revolutions per minute.

The number of poles is the number of poles formed by the winding of the motor after being energized, divided into 2 poles, 4 poles, 6 poles, 8 poles, etc., the speed of different levels of output is different, theoretically its speed is equal to the frequency (50Hz) * 60 pole pairs. That is, 3000 rpm for 2-pole motors, 1500 rpm for 4-pole, 1000 rpm for 6-pole, and 750 rpm for 8-pole.

When choosing a motor, you need to consider how much starting torque is required for the load, for example, starting with a load is larger than starting with no load. If it is a high-power and high-load start, it is also necessary to consider step-down start (or star-delta start); As for the speed matching of the motor and the load after determining the number of pole pairs, it can be considered to use different diameter pulleys for transmission or use variable speed gears (gearboxes) to match. If the power requirement of the load cannot be reached after the belt or gear transmission after the number of pole pairs of the motor is determined, then the use power of the motor should be considered.

The process is reversed.

1.First of all, it is necessary to determine how many tons of press to make. For example, 100 tons.

2.Now 30 megapascals of hydraulic technology is normal. To be on the safe side, according to the 25 MPa design, determine the diameter of the cylinder. For example, 200 mm.

3. Know the cylinder diameter, stroke, and expected cylinder extension speed, you can find the oil pump flow, such as 60 liters per minute.

4 Know the pressure, flow, converted motor power 25 MPa x 60 liters 60 = 25 kW If it is 10 tons, the pressure is 25 MPa. The bore is around 70mm.

with kilowatt motors. It can drive an 18-litre minute oil pump. There are a lot of them on the market. For example, the SCY14 series.

Oh, your thinking is reversed, you should choose the cylinder and pressure you need according to the weight required by your machine, calculate the flow rate of the oil pump according to the speed, and then choose your oil pump according to your flow rate and pressure, and then calculate your motor, instead of selecting the oil pump according to the motor, I hope it can help you.