How to calculate the radial force

1. If the shaft is placed horizontally and the disc has no other connectors, the static radial load is: the gravity (about: mass x9.8) n on the disc. The static and dynamic radial loads are related to the contact angle between the roller and raceway.

2.

1. The calculation of the circumferential force of the belt pulley

first use the conversion ratio of the belt pulley speed and the belt pulley diameter, speed ratio = output speed: input speed = pitch circle diameter of the load belt pulley: pitch circle diameter of the motor belt pulley. The circular force and the reference force are the same, diameter - 2H = pitch circle diameter, h is the groove depth on the reference line, different types of V-belt h are different, yzab CDE, the circular force on the reference line are h = 1.62 2.753.54.88.19.6 respectively

2. Calculation of belt pulley radial force:

the radial force is the theoretical force of belt pulley pitch line position, which is generally expressed by PD, and the outer circle is generally expressed by OD. The conversion formula of pitch circle and outer circle is different for different groove types. Generally, it is easy to measure the outer circle of pulley, and calculate pitch circle according to the formula. SPZ:OD=PD+4; SPA:OD=PD+5.5; SPB:OD=PD+7; SPC:OD=PD+9.6

The axial force of the pulley is set as D1, N1 for the diameter and speed of the motor pulley (driving pulley) and D2, N2 for the diameter and speed of the driven pulley; That is, D2 = D1 * (N1 / N2). The minimum outer diameter of pulley a or spa is 80mm, SPZ belt, and the small pulley is not less than 63mm

extended data:

the recommended degree of pulley groove angle for different types of pulleys in different diameter ranges

1. The recommended degree of pulley groove angle for O-type pulleys is 34 degrees when the pulley diameter ranges from 50 mm to 71 mm; 36 degrees in the range of 71mm to 90mm, & gt; It is 38 degrees at 90mm

2. The diameter of A-type pulley is 34 degrees when the pulley diameter ranges from 71mm to 100mm, and 36 degrees when the pulley diameter ranges from 100mm to 125mm& gt; 38 degrees at 125 mm; When the diameter of B-type pulley ranges from 125mm to 160mm, it is 34 degrees; 36 degrees at 160 MM-200 mm, & gt; When 200 mm, it is 38 degrees

3. C-type pulley is 34 degrees when the pulley diameter ranges from 200 mm to 250 mm and 36 degrees when the pulley diameter ranges from 250 mm to 315 mm; 38 degrees at 315 mm

When the diameter of D-type pulley is 355mm-450mm, it is 36 degrees; At 450 mm, it is 38 degrees; E type is 36 degrees from 500mm to 630mm; It is 38 degrees when 630mm

3.

The solution is as follows:

If Z is used to represent the number of teeth of the gear, then: the circumference of the dividing circle= π D = ZP, that is, d = ZP/ π Make p/ π= m. Then d = MZ where. It's called molus. Because the pitch P of two gears must be equal, so the molus is equal

For the convenience of gear design and machining, the molus value has been standardized. The higher the molus is, the higher the height and thickness of the gear teeth are, and the greater the load they bear. Under the same conditions, the larger the molus is, the larger the gear is

extended data

Properties of circular force:

1. In any case, the resultant force of the moment center is zero (that is, the moment center is a fixed point, which should have the conditions to balance the circular force)

The circular force can be divided into several parts or couples without changing the effect on the figure

The translation theorem is not completely applicable to circular force

4. What kind of drill

the common drill bit is relatively simple, and the oil drilling bit is very complex

5. It has been installed many times, but it has never been calculated. The torque transmitted by the motor through the tail shaft should be determined according to the actual size of the motor encoder. This is not determined by the motor, but by the size of the encoder.

6. 5 Calculation of radial load ft and axial load FA of angular contact ball bearing and tapered roller bearing

when the equivalent dynamic load P of each bearing is calculated according to equation (13-8a), the radial load f is the radial load generated on each bearing by the radial force F acting on the shaft from the outside; However, the axial load F. is not completely generated by the external axial force F, but should be obtained according to the balance condition between the axial load on the whole shaft (including the derived axial force F e to the radial load f). Let's analyze this problem

according to the radial balance condition of the force, it is easy to calculate the radial load f.. FA on the two bearings from the radial force F acting on the shaft from the outside. When the magnitude and position of F are determined, the radial load f.. F. That's for sure. By F., F. Derived axial forces F, F. The size of can be calculated according to the formula in table 13-7. The calculated value of F, is equivalent to the normal installation condition, that is, it is approximately equivalent to that all the rolling elements of the lower half circle are loaded (the actual working condition of the bearing is not allowed to be less than this

2. The other end is marked as bearing 1. Take the shaft and its matching bearing inner ring as the separating body, if the axial balance is achieved, it should meet the requirements of

F. + FA = FA

If FA and F are obtained according to the formula in table 13-7. When the above relation is not satisfied, the following two situations will appear:

when f u+ F& gt; F The shaft has a tendency to move to the left, which is equivalent to that bearing 1 is "pressed" and bearing 2 is "relaxed". But in fact, the shaft must be in a balanced position (that is, the bearing seat must exert an additional axial force through the bearing elements to prevent the shaft from moving), so the total axial force F on the "pressed" bearing 1. Must be with F. + F. Phase equilibrium, i.e.

F = F. + F.

7. The axial direction is the direction of the fan axis, the radial direction is 90 degrees horizontal with the axial direction, and there is a vertical direction, vertical is easy to understand

8. The radial acceleration a = f / m, so the radial force F = a × m

9. Bearing radial load = radial force a, radial force B, shaft, gear and other rotating parts gravity, the bearing bears part of the force, the vector sum of these three forces.

10. The strength and stability of the steel pipe have influence on the radial bearing capacity of the steel pipe. When the steel pipe is in tension, its destructive property is strength failure. The design value of the axial tension it can bear is n = a * F, where a is the cross-sectional area of the steel pipe and F is the strength design value of the steel pipe. The rection of the wall thickness of the steel pipe will inevitably lead to the rection of the cross-sectional area of the steel pipe, which will lead to the rection of the axial tension value of the steel pipe. When the steel pipe is compressed, its failure is stability failure, and the design value of the pressure it can bear is n= γ* F * a, where: γ It is the overall stability coefficient of steel pipe, which can be found from the attached table of steel structure design code according to its slenderness ratio λ= L / I, where l is the calculated length and I is the radius of gyration of the section. The decrease of the wall thickness of the steel pipe will inevitably lead to the decrease of I, because I = sqrt (I / a), where I is the moment of inertia of the section of the steel pipe and a is the area of the section. Therefore, the decrease of the wall thickness will lead to the decrease of the slenderness ratio
calculation formula of radial bearing capacity of steel pipe
: ft = 2T / d.