CN2190037Y - Wheel shaft for mining car - Google Patents

Abstract

The utility model discloses a wheel shaft for a mining car. The bearing of the utility model adopts a cylindrical roller bearing, and the seal adopts the contact type seal device of the end surface of a metal ring. The structure of the wheel shaft for a mining car can bear the impact load from the radial direction and the axial direction, and can normally work in sewage and dust atmosphere.

Description

Wheel shaft for mining car

The utility model relates to a kind of Bogie truck axles that contains antifriction-bearing box, especially can be at sewage, and the Bogie truck axles of normal operation in the dust atmosphere.

Each mineral bureau of China uses at present, the Bogie truck axles that transports coal from mine earthward is the design of quoting the former Soviet Union: work such as ［ 1 ］ Г Я Pei Sahuoweiqi, И П Le Mizuofu, Wu Jin just waits and translates, Coal Industry Press's mine in June nineteen eighty-three transportation handbook § 27.2 is railway carriage formula load-carrying mine car fixedly, Figure 27 .2 tramcar wheel.［ 2 ］ Japanese plum is gloomy writes, Coal Industry Press in May, 1986, mine rail transportation, the structure and the calculating of chapter 3 the 3rd joint P95 five wheel shafts.［ 3 ］ Wang Zhiyong, Xia Qinfen chief editor, Coal Industry Press in November, 1984, coal mine special equipment design calculation (lifting container and narrow gauge transportation device) chapter 2 first segment P30 wheel shaft.Its structure is made up of wheel, axletree, bearing and sealing arrangement.Bearing is radial ball bearing or the tapered roller bearing that adopts two cover standards, and sealing arrangement adopts at bearing end installation labyrinth seal ring, the labyrinth seal that rubber oil sea circle or felt seal are formed.Because mine car is in operation, wheel bearing is except that bearing fixing radial weight such as load carrying ability and pulling force, also often be subjected to the radial and axial minor load that adds that bigger impact shock causes, now the radial ball bearing of Cai Yonging is suitable for bearing Radial load, the ability of bearing axial load is low: though tapered roller bearing can bear the footpath by force again than radial ball bearing load-bearing capacity, axial joint load, but when this class bearing uses such as the bearing internal clearance adjust mal, will significantly reduce service life, and in Bogie truck axles the adjust a bearing gap is installed is extremely difficult, again because the material of these two kinds of bearings is bearing steels, under bigger impact shock load effect, frequent chipping damage.The sealing arrangement that existing wheel shaft adopts, having under the situation of shock and vibration, sewage, dust are not had sealing function, sewage and dust enter wheel bearing, make that grease is rotten to run off, make bearing unlubricated and by the environment of sewage, dust filling in work and early failure.This just causes existing Bogie truck axles short service life, the service expenditure height.The traffic department that mineral bureau is responsible for the mine car maintenance is introduced: the existing use with Bogie truck axles just began to damage in 1500～2000 hours.

The purpose of this utility model provides a kind of improved Bogie truck axles, and its bearing installation is convenient to bear the footpath, the axial impact load that changes, and can be in the sewage dust atmosphere normal operation, the service life of improving wheel shaft.

For reaching above-mentioned purpose, the utility model has designed has dynamic load rating, the impact load that the basic static capacity (BSC) rating ability is strong, can bear the footpath, axially change, no retainer, outer astragal folk art term limit, single grade of limit of interior astragal peace ring washer, the non-standard cylindrical roller bearing made from case-hardening steel is as the Bogie truck axles bearing.

Adopted and to have prevented that under the situation of impact shock is arranged sewage and dust from entering in wheel bearing and the bearing grease to the becket end face contact type sealing device of external leakage, one of two becket is fixed on the wheel by rubber ring and is called rotating ring with wheel, one is called stationary ring by transfixion on the rubber ring anchor shaft, the end face of two beckets is fitted mutually and slide relative under the resilient force of rubber ring, between two contact surfaces, keep one deck oil film as thin as a wafer, have hydrodynamic pressure and static pressure and obtain excellent sealing performance, constitute the primary sealing area of wheel bearing, two rubber rings constitute rotating ring and stationary ring with wheel and axletree interference fit respectively, and prevent that sewage and dust from being leaked by other contact surfaces, plays the auxiliary seal effect.

The utility model design-calculated bearing and sealing arrangement, the wheel of its each fit dimension and used MG type Bogie truck axles and the relative dimensions of axletree consistent can direct mount in used Bogie truck axles, it is as follows to contrast its advantage through the wheel shaft of this repacking and existing wheel shaft:

1, assembling is simple

The wheel shaft of existing tapered roller bearing needs the adjust a bearing gap during installation, the adjust a bearing gap is that an extremely difficult job is frequent owing to the adjust the clearance mal during assembling wheel shaft, influences the service life of bearing.The cylindrical roller bearing of utility model, bearing internal clearance adjusted is good during manufacturing, and in wheel shaft when assembling, be the adjusting play again.

2, load-carrying capacity is big

The cylindrical roller bearing of utility model is than the radial ball bearing of same inside and outside footpath size, and the load-carrying capacity of tapered roller bearing is big, and its dynamic load rating, basic static capacity (BSC) rating are 2.8 of radial ball bearings, doubly is 1.7 times of tapered roller bearing.

3, long service life

Same service conditions with outside cut the cylindrical roller bearing of utility model under the lotus effect design life be 10 times of tapered roller bearing in identical inside and outside footpath.Again because the good seal performance of the becket side seal that utility model adopts, can prevent also that under the situation of impact shock is arranged sewage, dust from entering bearing inside and prevent that grease is to external leakage in the bearing, bearing is worked under good lubricating status, work under the long life for bearing and created condition.

4, the anti shock and vibration ability is strong

Standard form tapered roller bearing and radial ball bearing are to use the bearing steel manufacturing, are unsuitable for working under the big condition of impact shock.Cylindrical roller bearing of the present utility model adopts wear-resistant, and impact-resistant case-hardening steel manufacturing is suitable for the service conditions of the big Bogie truck axles of impact shock, has reduced the damage probability of bearing.

As seen existing Bogie truck axles is reequiped with the utility model, significantly improve its service life, and the simple reliable operation of working service, prolong the maintenance used life, reduced the use cost of maintenance of wheel shaft, and reduced because maintenance replacing bearing influenced between the middle stopping time of Coal Transport, mine car quantity during China uses is big, just there are ten thousand mine cars of 3-4 in a medium-sized mineral bureau, so the utility model wheel shaft promotes the use of in the colliery, and its economic results in society are obvious.

Below in conjunction with accompanying drawing the utility model is described in further detail, accompanying drawing is that the utility model Bogie truck axles is used for the half-sectional view of facing on the MG type mine car, and each size is drawn by 1:1 among the figure.

1-5 is existing original part in addition with MG type Bogie truck axles among the figure: 1 wheel, 2 binding bolts, 3 pressing plates, 4 mine car axles, 5 clamp nuts.

6-17 is the utility model design-calculated part in addition: 6 cylindrical roller bearing outer rings, the flat ring washer of 7 cylindrical roller bearings, 8 cylindrical rollers, 9 cylindrical roller bearing inner rings, more than four form the no retainer cylindrical roller bearings of a cover, considering has impact shock when mine car moves, and selects impact-resistant case-hardening steel manufacturing for use, utilize the shelves limit peace ring washer of the inside and outside lasso of bearing to bear axial load, utilize the raceway of the inside and outside lasso of bearing and the face of cylinder of cylindrical roller to bear radial weight and capsizing moment.

The outer ring washer of 10 bearings, ring washer in 11 bearings, 12 rubber ring Jing Quan, 13 metal end face sealing ring stationary rings, 14 metal end face sealing gyration rings, 15 rubber ring moving-coils, 16 seal ring back pressure adjustable rings, 17 seal ring back pressures are adjusted volution, more than eight form associated sealing arrangement for bearings.Becket 13 interference fit are installed on the rubber ring 12, and 12 interference fit are installed on the bearing home record circle 11, and 11 convex shoulders by bearing inner ring end face and axletree 4 axially are fixed tightly on the axletree, and axletree does not rotate during the mine car operation, constitutes the stationary ring of sealing arrangement thus.Becket 14 interference fit are installed on the rubber ring 15, and 15 interference fit are installed on the bearing overside circle 10, and 10 are pressed to the outside race end face by pressing plate 3 is fixed on the wheel, constitute the rotating ring of sealing arrangement during the mine car operation with wheel.Two beckets 13,14 contacted end faces have good surface finish and planeness, under the resilient force of rubber ring 12 and 15, two smooth end faces are by pressing, and slide relative, between two contact surfaces, keep one deck oil film as thin as a wafer, have hydrodynamic pressure and static pressure, obtain excellent sealing performance, play contact seal, prevent that sewage and dust from entering in the bearing and prevent that bearing in-to-in grease is to external leakage, impact shock during the mine car operation is absorbed by rubber ring, avoid vibratory impulse to pass to and guarantee the leak free reliability on the sealing surface, rubber ring prevents that also sewage and dust from entering bearing by other surfaces, play the auxiliary seal effect, the elastic force of rubber ring is by adjustable ring 16 and adjust volution 17 and adjust, and makes seal face obtain suitable sealing load, and guarantees to be compensated contact all the time after the smooth end face wearing and tearing of two seal rings.

Claims (3)

1, a kind of Bogie truck axles, it comprises wheel, axletree, bearing, sealing arrangement, it is characterized in that: this bearing is to bear the non-standard cylindrical roller bearing that directly, axially changes impact load; Sealing arrangement adopts becket end face contact-type seal, this device is made up of two beckets and two rubber rings, one 14 of two becket is fixed on the wheel with wheel by rubber ring 15, be fixed on transfixion on the axletree by rubber ring 12 for one 13, the end face of two beckets is fitted mutually under the resilient force of rubber ring and slide relative constitutes primary sealing area.

2, Bogie truck axles according to claim 1 is characterized in that: bearing adopts the case-hardening steel manufacturing.

3, Bogie truck axles according to claim 1, it is characterized in that: bearing does not have retainer, outer astragal folk art term limit, the non-standard cylindrical roller bearing of interior astragal single block border peace ring washer.