CN102996685A - Lever type magnetic suspension brake - Google Patents

Abstract

The invention discloses a lever type magnetic suspension brake. The middle parts of an outside lever device and an inside lever device are respectively connected at two sides of a pole plate through respective middle shaft and respective shaft bracket; a rubber spring is arranged between each of the two shaft brackets and the pole plate; the opposite inner side surfaces of the upper ends of the outside lever device and the inside lever device are respectively connected with a brake pad through a pin shaft; and the lower ends of the outside lever device and the inside lever device are respectively connected at two sides of a hydraulic cylinder through a connecting shaft. A plier-type brake structure is adopted by the lever type magnetic suspension brake, and the hydraulic cylinder is used as a brake force generating unit and controlled by a brake control loop such as brake valves, wherein a brake arm at the inner side of the brake is of a small bending radius structure and therefore the installation of the brake arm at the inner side is facilitated. The ultimate displacement of the brake arm is plus or minus 10mm; and the inclined angle of a track can be protected against eccentric wear through the slight up and down swinging of the brake pad, thus good tightness is obtained and maintenance and installation are facilitated; and friction plates can be conveniently dismantled to replace and the operation cost is saved.

Description

Level type magnetic floats break

Technical field

The invention belongs to the rail locomotive break, particularly the floating break of a kind of level type magnetic.

Background technique

The floating break of magnetic is as the running part of magnetic suspension train, and the safe operation of train is played vital effect, and existing brake structural is complicated, and installation and maintenance are inconvenient.

Summary of the invention

Technical problem to be solved by this invention is: provide a kind of level type magnetic to float break.

Technological scheme of the present invention is:

A kind of level type magnetic floats break, it is characterized in that: a structure that is formed pincer by outer lever device and inboard leverage, the both sides that the middle part of outer lever device and inboard leverage is connected to pole plate by separately jack shaft and pedestal respectively, between two pedestals and the pole plate rubber spring is arranged, the outer lever device be connected on the relative inner side surface in the upper end of leverage that each connects brake lining by bearing pin, each is connected to the both sides of oil hydraulic cylinder by coupling shaft in outside leverage and inboard leverage lower end.

Effect of the present invention is:

This level type magnetic suspension break adopts pincerlike brake structure, and with the generation unit of oil hydraulic cylinder as braking force, oil hydraulic cylinder is controlled by brake servo circuits such as brake valves, and wherein surveying brake arm in the break is little curved gauge structure, makes things convenient for the inside brake arm to install.Extreme displacement ± the 10mm of brake arm; The up and down small sway of braking plate can be to the tilt angle of track, prevent that it from the eccentric wear phenomenon occuring, and good airproof performance, is convenient to safeguard, install that friction plate is convenient to change, save operating cost.

Description of drawings

Fig. 1 is the structural representation of the floating break of level type magnetic

Among the figure: 1 bearing pin, 2 outer lever devices, 3 brake linings, 4 inboard leverages, 5 oil hydraulic cylinders, 6 pole plates, 7 rubber springs, 8 bands for wheel hub.

Embodiment

Comprise rubber spring composition, outer lever device, brake lining composition, inboard leverage, oil hydraulic cylinder, the pole plate etc. of the floating break of level type magnetic partly form as shown in Figure 1.This level type magnetic floats break, it is a structure that is formed pincer by outer lever device and inboard leverage, the both sides that the middle part of outer lever device and inboard leverage is connected to pole plate by separately jack shaft and pedestal respectively, between two pedestals and the pole plate rubber spring is arranged, the outer lever device be connected on the relative inner side surface in the upper end of leverage that each connects brake lining by bearing pin, each is connected to the both sides of oil hydraulic cylinder by coupling shaft in outside leverage and inboard leverage lower end.

Its parameter

Its characteristics

1), realizes the extreme displacement of brake arm ± 10mm.

2), realize the up and down small sway of braking plate with the tilt angle of reply track, prevent that it from the eccentric wear phenomenon occuring.

3), good airproof performance.

4), be convenient to safeguard, install.

5), friction plate is convenient to change, save operating cost.

This level type magnetic suspension break adopts pincerlike brake structure, and with the generation unit of oil hydraulic cylinder as braking force, oil hydraulic cylinder is controlled by brake servo circuits such as brake valves, and wherein the inboard brake arm of break is little curved gauge structure, makes things convenient for the inside brake arm to install.

Break adopts the twin shaft means of fixation according to the two oval pore structures of pole plate, break is fixed on the pole plate, and falls in order to realize that the car brakeing rear overhang floats, and the stationary axle outside is installed additional rubber spring, and the high-low limit displacement of rubber spring is ± 10mm.

Adopt the bearing pin rotational structure between braking plate (brake lining) and the brake arm (interior outside leverage), increase a rotary freedom, braking plate comprehensive engagement track does not produce eccentric wear when guaranteeing braking.Brake arm is installed the side and is adopted plane structure, guarantees that it limits again its angle of swing having in situation of degrees of freedom, guarantee the device security running.

Tackle in new bogie structure, need to be to its processing that narrows, comprising following two aspects:

1), the break outer ledge is carried out minimization according to the electromagnet distance.

2), adopt cotter pin to carry out axially locating to the break running shaft, and make running shaft and cotter pin recessed the brake arm bilateral hole milling, guarantee that whole mechanism minimizes.

Level type magnetic floats the break principle:

1, this level type magnetic suspension break adopts pincerlike brake structure, and with the generation unit of oil hydraulic cylinder as braking force, oil hydraulic cylinder is controlled by brake servo circuits such as brake valves, and wherein the inboard brake arm of break is little curved gauge structure, makes things convenient for the inside brake arm to install.

2, break adopts the twin shaft means of fixation according to the two oval pore structures of pole plate, break is fixed on the pole plate, and falls in order to realize that the car brakeing rear overhang floats, and the stationary axle outside is installed additional rubber spring, and the high-low limit displacement of rubber spring is ± 10mm.

3, adopt the bearing pin rotational structure between braking plate and the brake arm, increase a rotary freedom, braking plate comprehensive engagement track does not produce eccentric wear when guaranteeing braking.Brake arm is installed the side and is adopted plane structure, guarantees that it limits again its angle of swing having in situation of degrees of freedom, guarantee the device security running.

4, tackle in new bogie structure, need to be to its processing that narrows, comprising following two aspects:

1), the break outer ledge is carried out minimization according to the electromagnet distance.

2), adopt cotter pin to carry out axially locating to the break running shaft, and make running shaft and cotter pin recessed the brake arm bilateral hole milling, guarantee that whole mechanism minimizes.

Annotate: the oil hydraulic cylinder parameter is determined:

At first determine the size of the required chucking power Fj of brake arm, can be got by formula F j * μ=f:

$\mathrm{Fj}=f/\mathrm{\μ}=\frac{250\×9.8}{0.5}=4900\left(N\right)$

If enabling to produce about 4900N is Fj, then need satisfy:

Fy×sinα×L1≥Fj×sinβ×L2

Draw:

$\mathrm{Fy}\≥\frac{\mathrm{Fj}\×\sin \mathrm{\β}\×L2}{L1\×\sin \mathrm{\α}}$

Shape and size according at present designed brake arm can draw:

L1=102mm L2=156.67mm

α=53° β=90°

Can draw:

Fy≥9423.95N

And then calculate required oil cylinder internal diameter, drawn by p=F/A: A=F/p draws:

$A\≥\frac{\mathrm{Fy}}{p}=\frac{9423.5}{15}=628\left({\mathrm{mm}}^2\right)$

Draw:

D≥28.3mm

According to GB/T2348-1993, selecting the oil cylinder internal diameter is 32mm, selects beam hanger directly to be 22mm.

Secondly determine whether compound gauge provisioning request of piston stroke, according to existing break the sphere of activities,

Can calculate its hydraulic cylinder travel is:

S=L2-L1=254.74-183=71.74 ≈ 72(is nonstandard size)

Allow length to be by the beam hanger diameter of oil hydraulic cylinder, the maximum that the oil cylinder internal diameter calculates hydraulic rod

$L=\frac{{192.4d}^2}{D\sqrt{p}}=751.37\left(\mathrm{mm}\right)$

Get I2=21 (mm) l1=162-72=90 (mm)

Then the maximum stroke that allows is

S _k=0.5×（L-I1-I2）=320.185(mm)

Can draw S＜Sk, then S meets the requirements, and determines the oil hydraulic cylinder size.

Claims (1)

1. a level type magnetic floats break, it is characterized in that: a structure that is formed pincer by outer lever device and inboard leverage, the both sides that the middle part of outer lever device and inboard leverage is connected to pole plate by separately jack shaft and pedestal respectively, between two pedestals and the pole plate rubber spring is arranged, the outer lever device be connected on the relative inner side surface in the upper end of leverage that each connects brake lining by bearing pin, each is connected to the both sides of oil hydraulic cylinder by coupling shaft in outside leverage and inboard leverage lower end.

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