Parameters and production standards of water pump couplings

The coupling is the connection between the shaft and the shaft, and the water pump coupling looks similar to the plum blossom coupling in appearance.Pump couplings generally use flexible couplings for the purpose of transmitting power, compensating for the relative displacement between the pump shaft and the motor shaft, reducing the requirements for accurate alignment of the coupling installation, mitigating shocks, and changing the natural frequency and vibration of the shaft system. Avoid hazardous vibrations, such as plum blossom couplings, star couplings, elastic pin sleeve couplings, etc.The claw coupling is a kind of water pump coupling. The middle sliding block is made of cloth-filled bakelite or polyurethane. It is light in weight, simple in structure and easy to install. It is often used in small power occasions and is suitable for low torque. Two-axis connection with high speed and no sharp impact.The transmission torque of nylon slider is smaller, but it is more suitable for high-speed operation and does not need lubrication.Coupling alignment mainly measures its radial displacement and angular displacement. When the two shafts are on different axes, there will be a relative deviation between the outer rings or end faces of the two couplings. According to the measured deviation value, the shaft center line can be calculated. Deviation value, in order to obtain correct measurement results, it is necessary to rotate the two rotors at the same angle, and confirm that the relative position of the measuring point on the coupling is variable. In this way, the uneven surface of the coupling and the axis line of the end face can be removed. Error caused by not vertical.

Parameters and production standards of water pump couplings

1. Standard parameters of claw water pump coupling: nominal torque: 6.3-16000N.m, allowable speed: 8800-1150rpm, shaft hole diameter: 9-170mm, shaft hole length: 14-302mm, standard number is GB4323-2002 , Optional materials include cast iron, cast steel, 45# round steel, forged steel, weight: 0.5-16.5KG.

2. The transmission torque of nylon slider is smaller, but it is more suitable for high-speed operation and does not need lubrication.

3. The transmission torque is large. At the same torque, the rotation diameter is mostly smaller than the gear coupling, which can partially replace the gear coupling.

4. The three-jaw coupling for pumps is a pin made of several non-metallic materials, placed in the mating hole between the two halves of the coupling and the inner surface of the outer ring, and the two halves are transmitted through the pin. A device connected by a coupling.

5. Because the water pump coupling is made of cast iron, it is easy to be damaged during transportation. Generally, it is recommended to use wooden box foam to pack it during transportation.

6. The water pump coupling is small in size, light in weight, simple in structure and easy to install. It is often used in occasions with low power.The allowable relative competition displacement is 0.01d+0.25mm, the standard code is Bl104, the major shaft diameter is 50mm, and the maximum allowable torque is 850N/m.

Regarding the question of how to choose a water pump coupling, we generally recommend that users choose a water pump coupling to follow three principles: water pump coupling is a common coupling, and some customers do not know which coupling to choose. Working conditions.

(1) The elastic sleeve pin coupling is to put a rubber ring on the pin in a group, and then use a screw cap to fix it on the flange holes of the two halves of the coupling. The rubber ring has elasticity and compensates for axis displacement. have experience.This kind of coupling is suitable for medium-sized pumps.It is a non-metal elastic element coupling with simple structure, no lubrication, convenient installation, easy replacement, and does not require high centering accuracy. It is often used in pumps with lower power.

(2) The elastic pin coupling is to fill the nylon rod into the flange holes of the two halves of the coupling, and then use the baffle to fix the nylon rod on the two halves of the coupling. Transfer torque.This kind of coupling is relatively suitable for large-scale use.The pin is connected to the flanges of the two halves of the coupling. One end of the pin is fixedly fitted with the conical surface and the taper pin hole of the nut and the flange of the half coupling. The other end is equipped with an elastic sleeve, which is installed in In the pin hole of the flange of the other half of the coupling, the elastic sleeve is made of rubber.

Coupling is a mechanical part used to connect two shafts (active shaft and driven shaft) in different mechanisms to rotate together to transmit torque.In the high-speed and heavy-duty power transmission, some couplings also have the function of buffering, damping and improving the dynamic performance of the shafting.According to the size of the transmitted load, the speed of the shaft, the installation accuracy of the two parts to be connected, etc., refer to the characteristics of various couplings, and select a suitable coupling type.The size and nature of the torque to be transmitted and the requirements for the buffering and damping function.For example, for high-power and heavy-duty transmissions, gear couplings can be selected; for transmissions that require severe impact loads or requiring removal of shaft torsional vibration, tire couplings and other couplings with high elasticity can be selected.