2. Secondary suspension: lateral hydraulic shock absorber anti-hunting shock absorber (a unique movement phenomenon called "hunting" will occur when railway vehicles are walking, which can guide the running of railway vehicle lanes in a certain range, but with the increase of train speed, the running speed of the train may exceed the critical speed of hunting, and if the hunting movement is not suppressed in high-speed operation, it will lead to hunting instability and derailment) air spring.
3. Wheel-to-axle box: the hollow axle partially quenched by steel wheels is polished by straight wide plate (the hollow axle can effectively reduce the unsprung weight, reduce the damage to high-speed lines, reduce post-construction settlement and ensure the smoothness of lines). Self-sealing double-row tapered roller bearings for aluminum alloy gearboxes (the bearings of ordinary railway passenger cars are all double-row tapered roller bearings, which have certain lateral and longitudinal impact resistance, and may also be related to the comfort of passengers, which I am not sure about).
4. Basic braking devices include hydraulic braking equipment such as brake disc, brake caliper and brake beam (please note here that the main braking mode on high-speed trains in China is regenerative braking, and hydraulic braking is auxiliary braking. Regenerative braking can achieve considerable braking force at high speed, and the braking force is small at low speed, which requires hydraulic braking to assist braking.
5, drive system → traction motor
6. Traction system → traction rod
7. Other equipment: cleaning the axle tread, electronic anti-skid device, speed sensor and other equipment troubleshooting devices.
SKMB-200 (bullet train) bogie
Structural features: (1) adopts an H-shaped frame (2), the cross beam is a seamless steel tube (3), and there are two traction motor drive shafts (4), and each shaft has two disc brake discs (5). A booster cylinder is responsible for braking a wheelset.
SKMB-200 bogie drawbar (picture from Baidu Library)
SKTB-200 (trailer) bogie
Structural features: (1) The beam of seamless steel pipe (3) adopts H-shaped frame (2). Each shaft has two disc brake discs and an axle disc brake disc (4). A booster cylinder is responsible for braking a wheelset.
SKTB-200 bogie drawbar (picture from Baidu Library)
CRH2 knowledge xiaojiangtang
Imitate forever, surpass forever-China high-speed rail
Introduction, Digestion, Absorption and Re-innovation —— Ministry of Railways
The prototype of CRH2 EMU is Japanese Shinkansen E2- 1000 series EMU, which is manufactured by CRRC Qingdao Sifang Locomotive and Rolling Stock Factory (formerly CSR Sifang Locomotive and Rolling Stock Co., Ltd.). The grouping methods are 4m4t, 6m2t and 8m8t. Subordinate sub-models are: famous CRH2A(4M4T), CRH2B( 16 section reconnection, 8M8T), CRH2C(6M2T), CRH2E (sleeper train) and CRH2G (cold-resistant).
Compared with the prototype bogie, the primary suspension is the most changed part, as shown in the figure:
The picture comes from Baidu Library.
Double-pulling plate → axle box rotating arm type (considering the stability of fuzzy positioning stiffness and the requirements of curve passing performance, light weight, simplicity and no wear).
Compared with the wheelset prototype, some changes have also been made:
① Rim width, tread shape and spoke thickness. (The specific parameters above here are not clear.
② Journal diameter, journal length and journal length. If there are specific parameters in the subsequent UP master review papers,
(3) The internal distance of the wheel, bearing structure and lubrication. If there is an explanation, UP will be completed in the comment area)