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Railway vehicle parking braking method and parking cylinder for implementing method

A technology for parking brake and rail vehicle, which is applied in the fields of parking cylinder, rail vehicle parking brake, and rail vehicle brake, can solve the problems of reduced parking brake force and spring fatigue attenuation, and achieves volume reduction, weight reduction, The effect of high driving safety

Active Publication Date: 2021-05-25
CRRC QINGDAO SIFANG ROLLING STOCK RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the above-mentioned problems such as reduction of parking braking force due to spring fatigue attenuation existing in the existing parking braking process, and provides a parking braking method for rail vehicles and a parking cylinder for implementing the method. The parking braking method It does not rely on the spring to provide the power source, and the braking force can be flexibly adjusted according to the load of the vehicle, which ensures high driving safety

Method used

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  • Railway vehicle parking braking method and parking cylinder for implementing method
  • Railway vehicle parking braking method and parking cylinder for implementing method
  • Railway vehicle parking braking method and parking cylinder for implementing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Embodiment 1: see figure 1 , a parking brake method, the concrete steps are:

[0066] S1. Fill the parking cylinder with compressed air to make the parking cylinder in the unlocked state, fill the brake cylinder with compressed air, apply the service brake, discharge the compressed air in the brake cylinder, and relieve the service brake. It should be noted that when the parking cylinder is in the unlocked state, the brake cylinder can only apply and release the service brake.

[0067] S2. Discharge the compressed air in the parking cylinder, make the parking cylinder in a locked state, fill the brake cylinder with compressed air, and apply the parking brake; charge the compressed air in the parking cylinder, make the parking cylinder in an unlocked state, and discharge the brake Compressed air in cylinder to relieve parking brake.

[0068] Specifically, when the vehicle needs to be towed in the parking braking state and the parking cylinder cannot be unlocked by char...

Embodiment 2

[0070] Example 2: see figure 2 , a parking cylinder, combined with a brake cylinder, used to implement the rail vehicle parking braking method described in embodiment 1, the parking cylinder includes:

[0071] The parking cylinder 8 is provided with two symmetrically installed sealing chambers 3, and the parking cylinder 8 is provided with a first air inlet 10 connecting the parking air duct and the sealing chamber 3;

[0072] The parking lead screw 1 is located in the parking cylinder 8;

[0073] The parking nut 2 is sleeved on the parking screw 1, and cooperates with the parking screw 1 through a non-self-locking trapezoidal thread, and one side of the parking nut 2 is connected to the brake cylinder piston in one direction through two symmetrically arranged parking tie rod bolts 6 , the other side is equipped with two symmetrically arranged parking pistons 7, and each parking piston 7 cooperates with a sealed cavity 3;

[0074] Two parking recognition springs 9 arranged ...

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Abstract

The invention relates to a railway vehicle parking braking method and a parking cylinder for implementing the method. The parking braking method comprises the specific steps that compressed air is charged into the parking cylinder, so that the parking cylinder is in an unlocking state, compressed air is charged into a brake cylinder, service braking is applied, compressed air in the brake cylinder is discharged, and service braking is relieved; the compressed air in the parking cylinder is discharged, so that the parking cylinder is in a locked state, the compressed air is filled into the brake cylinder, and parking brake is applied; and the parking cylinder is filled with compressed air, so that the parking cylinder is in an unlocking state, the compressed air in the brake cylinder is discharged, and parking brake is relieved. According to the designed parking braking method, a parking braking power source is not provided by a spring, fatigue attenuation cannot occur along with the running time of the vehicle, the braking force can be flexibly adjusted according to the load of the vehicle, and the driving safety is high.

Description

technical field [0001] The invention belongs to the technical field of rail vehicle braking, and relates to a rail vehicle braking method, in particular to a rail vehicle parking braking method and a parking cylinder for implementing the method. Background technique [0002] The braking devices for rail transit vehicles all have the function of parking brakes. Most of the parking brakes are applied by compression springs. Expelling compressed air applies the parking brake by compressing spring force. For example: a Chinese invention patent with the authorized announcement number CN101788942B discloses a combination cylinder with a force conversion transmission device with a variable transmission ratio, including: a service brake cylinder as an active service brake, the service brake cylinder has at least one pressure-medium-operated service brake piston, which actuates a brake mechanism via the service brake lever; and a spring-accumulator cylinder as a passive parking brak...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B61H11/06
CPCB61H11/06
Inventor 覃立伟张志强刁有彬徐少亭黄士伟
Owner CRRC QINGDAO SIFANG ROLLING STOCK RES INST
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