Do mechanical, these mechanical transmission mode to understand

   　Mechanical transmissionWidely used in mechanical engineering, mechanical transmission mainly refers to the transmission of power and motion through mechanical means. Mechanical transmission can be divided into two types: one is to transmit power and friction transmission through the friction between parts, and the other is to transmit power or motion through the meshing between the driving part and the driven part or the meshing between the intermediate part.

1. mechanical transmission

1. Gear transmission

Classification: Plane and Space.

Advantages: suitable for a wide range of circumferential speed and power; accurate and stable transmission ratio, high efficiency; high working reliability and long service life; it can realize transmission between parallel shafts, intersecting shafts at any angle and staggered shafts at any angle.

Disadvantages: high manufacturing and installation accuracy, high cost. Not suitable for long-distance transmission between two shafts.

2. Turbine worm drive

It is suitable for motion and power between two axes that do not intersect vertically in space.

Advantages: large transmission ratio; compact structure and size.

Disadvantages: large axial force, easy to heat, low efficiency; only one-way transmission.

Electrical 2. of Mechanical Transmission

1. High accuracy of mechanical transmission

Servo motor as the power source, composed of ball screw and synchronous belt. It is a transmission mechanism with simple structure and high efficiency. The repeatability error is 0.01%.

2. Energy saving of mechanical transmission

The energy released during the deceleration phase of the work cycle can be converted into electrical energy for reuse, reducing operating costs. The connected electrical equipment is only 25% of the electrical equipment required for hydraulic drive.

3. Mechanical transmission control

According to the set parameters, with the support of high-precision sensors, metering devices and computer technology, the control accuracy can be greatly exceeded by other control methods.

4, mechanical transmission to improve the level of environmental protection

Due to the reduction of the types of energy used and the optimization of its performance, pollution sources and noise are reduced, which provides a better guarantee for the environmental protection of the factory.

Hydraulic pressure of 3. mechanical transmission

From a structural point of view, the output power per unit weight and the output power per unit size of the mechanical transmission are different among the four types of transmission methods, with a larger torque and inertia ratio.

From the perspective of work performance, the speed, torque, and power can be adjusted, the action response is fast, the speed range is wide, the action is fast, the control adjustment is simple, the operation is convenient and labor-saving, and the electrical control and the CPU (computer) connection are convenient, Easy automation.

From the perspective of use and maintenance, the components have good self-lubrication, easy to realize overload protection and pressure maintenance, safe and reliable; the components are easy to realize serialization, standardization and generalization.

Mechanical transmission economy: Hydraulic technology has strong plasticity and variability, which can increase the flexibility of flexible production, and it is easy to change and adjust production procedures. The manufacturing cost of hydraulic components is relatively low and the adaptability is strong.

　　Mechanical transmissionThe integration of "electromechanical, liquid and light", which is easy to combine with new technologies such as microcomputer control, has become the world's development trend, and it is easy to realize digitization.

Cut three samples with a length of 250 mm from one PJ V-ribbed belt, and mark a marking line with a spacing of 100mm at the middle position of the PJ V-ribbed belt. When more than three samples cannot be taken from one PJ V-ribbed belt, samples can be cut from the same batch of PJ V-ribbed belt, but must be indicated in the report. 7.4.2 High temperature resistance test method
Place the sample at 100 ℃ ± 2 ℃ for 96 h ± 1 h and then take it out. After standing at laboratory temperature for more than 2h, bend it along a cylinder with a diameter of 20 mm at a contact angle of at least 90 °.