CN210196283U - Dry-type air cooling heat dissipation transmission bearing box - Google Patents

Abstract

The dry-type air-cooling heat dissipation transmission bearing box comprises a bearing box body, a bearing box end cover, a transmission shaft and a transmission shaft bearing; the bearing box end cover comprises a universal bearing box cover and a special bearing box cover; the special bearing box cover is provided with a flange type connecting flange and a flange type connecting through hole; the special bearing box cover is also provided with a step countersunk through hole; the cylindrical head hexagon socket head cap screw is accommodated in the step countersunk head through hole, and the bearing box cover and the bearing box body are connected into a whole; the bearing box body is provided with an internal thread heat dissipation through hole which is screwed with the L-shaped heat dissipation pipe for heat dissipation and dust falling prevention. The utility model has simple structure, convenient assembly and disassembly, low manufacturing cost, low noise, good sealing performance, excellent heat dissipation and prominent environmental protection; the transmission shaft can be used for supporting and transmitting power, can be connected with the output end of the transmission, has the interface function of remote power transmission, and has wide application prospect and excellent universality.

Description

Dry-type air cooling heat dissipation transmission bearing box

Technical Field

The utility model belongs to a mechanical engineering bearing box technical field, concretely relates to dry-type air cooling transmission bearing box that dispels heat.

Background

The transmission mechanisms of a railway locomotive running system, an automobile transmission system and a transmission test bed all need to use a bearing box, so that the bearing box is used as an important component of mechanical transmission, and the heat dissipation performance of a bearing for supporting the rotation of a main shaft of the bearing box determines the stability of the operation transmission of the whole mechanical equipment. In the prior art, the transmission bearing box is cooled mainly by adopting a semi-oil immersion liquid lubrication cooling mode. The disadvantages are that: the liquid cooling is cooperated with the liquid lubrication, so that higher requirements are provided for the sealing performance of the box body of the transmission bearing box and the transmission shaft of the transmission box; in addition, the oil slinger must be additionally arranged and an oil storage tank is designed (see the Chinese patent with the publication number of CN 203770200U) for liquid lubrication and cooling, so that the structure of the transmission bearing box is complicated invisibly, the assembly and disassembly are inconvenient, and the manufacturing cost is overhigh; furthermore, in the aspect of environmental protection, the risk of leakage due to liquid lubrication and cooling is high, so that the development requirement of the design concept of green and environment-friendly products in recent years cannot be met and adapted. In contrast, although an environment-friendly design scheme that a heat dissipation bolt is arranged in the middle of a bearing box and dry heat dissipation is adopted to replace liquid heat dissipation is proposed in the patent with the publication number of CN207999386U, in the implementation of the design scheme, the manufacturing process of the T-shaped exhaust channel processed by the bolt head and the screw rod is complex and is not easy to implement, and for this reason, the following technical scheme is proposed.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem: providing a dry type air cooling heat dissipation transmission bearing box; the technical problems that a lower transmission bearing box in the prior art is complex in structure, inconvenient to disassemble and assemble, high in manufacturing cost, easy to leak due to liquid heat dissipation, lubrication and cooling and not environment-friendly are solved; and simultaneously, the technical problems that in the prior art, air cooling and environment-friendly heat dissipation are realized, vent holes are processed on a screw rod of a bolt head, and T-shaped vent holes are too complex in processing and manufacturing process, too high in cost and difficult to realize are solved.

The utility model adopts the technical proposal that: the dry-type air-cooling heat dissipation transmission bearing box comprises a bearing box body, a bearing box end cover, a transmission shaft penetrating through the bearing box and a bearing arranged in the bearing box body and supporting the transmission shaft to rotate, wherein the bearing box end cover comprises a general bearing box cover and a special bearing box cover; the flange type connecting flange is arranged on the outer edge of the cover body of the special bearing box cover; the flange type connecting flange plate body is provided with a flange type connecting through hole; the special bearing box cover is also provided with a step countersunk through hole for connecting the bearing box body; the nut of the hexagon socket head cap screw is completely accommodated in the step countersunk head through hole, and the special bearing box cover and the bearing box body are axially fastened and connected into a whole; the box body of the bearing box body is also provided with a heat dissipation through hole, the heat dissipation through hole is arranged in the direction vertical to the central line of the transmission shaft, the inner side wall of the heat dissipation through hole is provided with internal threads, and the heat dissipation through hole is screwed with the internal threads of the heat dissipation through hole to be matched with and provided with a heat dissipation pipe; the radiating pipe is bent to be L-shaped for radiating and blocking dust.

For convenience, grease can be injected into the tapered roller bearing without opening the pedestal cover, and further: the bearing is a single-row tapered roller bearing; the side wall of the bearing box body close to the box body of the tapered roller bearing is provided with a grease injection hole; the grease injection channel of the grease injection hole inclines towards the bearing gap of the row tapered roller bearing; the grease injection hole is provided with a joint type pressure injection oil cup.

For environmentally friendly, leak-proof, reliable lubrication, preferably: the bearing is lubricated by lubricating grease, and the lubricating grease is calcium-based lubricating grease or lithium-based lubricating grease.

In order to adaptively adjust the axial clearance between the bearing box body and the bearing box end cover, further: an asbestos plate liner and a tin-plated iron sheet liner are arranged between the bearing box body and the bearing box end cover.

The utility model has the advantages compared with the prior art:

1. the special bearing box cover 6 of the utility model cooperates with the counter sink type mounting structure of the hexagon socket head cap screw 7, so that the transmission bearing box of the utility model, as shown in the embodiment of figure 4, is reliably connected with the integrated near end of the power transmission 12 of the rail locomotive; the compact and space-saving installation of the transmission bearing box of the utility model is realized;

2. the utility model adopts the combined action of air heat dissipation and lubricating grease lubrication, and has no leakage and is more environment-friendly compared with liquid lubrication heat dissipation;

3. compared with the T-shaped exhaust hole processed by a bolt in the background technology, the threaded connection structure of the L-shaped radiating pipe 9 and the radiating through hole 8 has simpler process and is easy to realize; the bent pipe radiating pipe with the L-shaped structure is cooperated, so that the manufacturing process is simple, and the L-shaped folding angle has the effects of dust blocking and dust falling prevention;

4. the grease injection hole 10 arranged obliquely can complete the operation of injecting lubricating grease into the gap of the tapered roller bearing by the near end without disassembling the end cover of the bearing box, thereby saving more oil and being simple and convenient for grease injection;

5. the elastic asbestos sediment and the galvanized iron sheet gasket of the utility model can achieve the effects of elastic sealing connection and axial clearance adjustment; wherein the asbestos gasket plays a role in sealing, and the galvanized iron sheet gasket plays a role in adjusting the axial clearance through the increase and decrease of the number of the iron sheet gaskets.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an embodiment of the present invention applied to the installation of a railway locomotive or a wheel set of a vehicle;

FIG. 3 is another embodiment of the present invention applied to a railway locomotive or a wheel set of a vehicle;

fig. 4 shows an embodiment of the present invention applied to a variable speed power transmission.

Detailed Description

Specific embodiments of the present invention will be described below with reference to fig. 1 to 4. It is to be understood that the following description of the embodiments is merely exemplary and not intended to limit the invention in any way.

The following examples are provided to facilitate a better understanding of the present invention, but are not intended to limit the present invention. The grease injection method and the maintenance method in the following examples are conventional methods unless otherwise specified. The components and materials used in the following examples are commercially available unless otherwise specified.

In the present invention, without the contrary explanation, it is understood that: the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing and simplifying the present invention, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected", "disposed" and "provided" are to be interpreted broadly, for example, as being either fixedly connected or detachably connected or integrally connected. For example, they may be mechanically connected directly or indirectly through other intermediate members. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Dry-type air cooling heat dissipation transmission bearing case includes bearing case body 1, bearing case end cover 2, wears to locate bearing case's transmission shaft 3, establishes at the bearing case this internal and support transmission shaft pivoted bearing 4. It should be understood that the same as the prior art universal mating seal structure: a sealing ring 301 is arranged between the bearing box end cover 2 and a matching hole of the transmission shaft 3 (shown in figure 1); the transmission shaft 3 is used for installing the bearing inner ring of the bearing 4 in an interference fit manner, and a bearing spring retainer ring 302 is installed on the bearing seat. Furthermore, a bearing hole for installing a bearing outer ring of the bearing 4 in an interference fit manner is formed in the bearing box body 1, the roughness of the bearing hole is controlled to be Ra3.2, and the fit tolerance of the bearing hole between the bearing box body 1 and the bearing outer ring is controlled to be-0.04 mm-0 mm; the coaxiality of bearing holes of the bearing outer rings at the two ends of the bearing box body 1 is controlled according to 0.05 mm; the roughness of a bearing seat used for installing a bearing inner ring in interference fit on the transmission shaft 3 is Ra6.3; the coaxiality of bearing seats for interference fit of the bearing inner rings at the two ends of the transmission shaft 3 is controlled according to 0.025 mm. The bearing box body 1 and the bearing box end cover 2 are made of HT200 cast iron; the sealing ring 301 is made of white felt, so that a silent sealing effect can be achieved; the bearing spring retainer ring 302 is selected according to the national standard GB/T894.1; the bearing 4 is a single-row tapered roller bearing selected according to the national standard GB/T297.

Furthermore, it is characterized in that: for satisfying the small space compact installation of transmission bearing case: the bearing box end cover 2 comprises a universal bearing box cover 5 and a special bearing box cover 6; wherein the universal bearing box cover 5 is a conventional bearing box cover; the flange type connecting flange 601 is arranged on the outer edge of the cover body of the special bearing cover 6 (shown in figure 1); a flange type connecting through hole 602 is formed in a disc body of the flange type connecting flange 601; in specific application, refer to the application embodiment of fig. 4, wherein, the application embodiment of the small-space compact integrated fixed connection of the transmission bearing box and the power transmission 12 box of the railway locomotive: the transmission bearing box is reliably connected with the special bearing box cover 6 and the box body of the power transmission 12 of the railway locomotive into a whole by a fastener through a flange type connecting flange 601 of the special bearing box cover 6, so that the transmission bearing box is suitable for being used in small-space compact installation application occasions. At the same time: the special bearing box cover 6 is also provided with a step countersunk through hole 603 (see fig. 1 again) for connecting the bearing box body 1; the nut of the cylindrical head hexagon socket head cap screw 7 is completely accommodated in the step countersunk head through hole 603, the screw of the cylindrical head hexagon socket head cap screw 7 passes through the step countersunk head through hole 603, and the special bearing box cover 6 and the bearing box body 1 are axially fastened and connected into a whole by using the cylindrical head hexagon socket head cap screw 7; thereby ensuring the flatness of the axial outside end face of the special bearing box cover 6. In addition, in order to realize bearing heat dissipation: the bearing box body 1 is also provided with a heat dissipation through hole 8 adopting an air dry type heat dissipation structure, the heat dissipation through hole 8 is arranged in a direction perpendicular to the central line of the transmission shaft 3, the inner side wall of the heat dissipation through hole 8 is provided with an internal thread, and a heat dissipation pipe 9 is arranged in a screwing fit manner with the internal thread of the heat dissipation through hole; the pipe body connecting part of the radiating pipe 9 is provided with an external thread; the radiating pipe 9 is bent to be L-shaped, can play the effect of blocking dust falling through the bending part when playing a role of radiating a through hole, can replace the hole-making radiating of a bolt fastener in the background technology, and has simple process, economy and practicality. Specifically, when the bearing 4 and the operation shaft 3 rotate at a high speed, heat generated by friction in the universal transmission bearing box is dissipated through the heat dissipation through hole 8 and the heat dissipation pipe 9, so that the temperature rise of the transmission bearing box is always kept in a reasonable range. Practice proves that: according to the structure design, the temperature rise of the transmission bearing box can be kept between 20 and 26 ℃ when the transmission bearing box runs at high speed.

Further, regarding the universal bearing housing cover 5 and the dedicated bearing housing cover 6: the universal bearing box cover 5 is used for occasions without the limitation of mechanical space, and the fastener of the universal bearing box cover 5 can be a GB/T5780 common bolt and a GB/T94.1 spring washer. The special bearing box cover 6 is used in the occasions limited by mechanical space, and the GB/T70.1 cylinder head hexagon socket head cap bolt 7 of the special bearing box cover 6 can be selected from a GB/T94.1 spring washer. Specifically adopt which kind of axle box lid, can be according to the operating mode, the nimble selection.

On this basis, in order to make things convenient for under the condition of not opening the case lid, can inject grease into bearing near-end, further: (see fig. 1) the bearing 4 is a single row tapered roller bearing; the single-row tapered roller bearing can meet the requirement of the transmission shaft 3 for bearing large load. To save fuel and grease at the proximal end: the bearing box body 1 is provided with a grease injection hole 10 close to the side wall of the box body of the tapered roller bearing; the grease injection passage of the grease injection hole 10 is inclined towards the bearing gap of the tapered roller bearing; specifically, the grease injection holes 11 may be axially symmetrically distributed, and grease is injected into the bearing gap of the tapered roller bearing 4 at a high pressure. In addition, the grease injection hole 10 is provided with a joint type pressure injection oil cup 11, and the joint type pressure injection oil cup 11 can meet the sealing and high-pressure grease injection requirements of the grease injection hole 10; specifically, the joint type pressure filling oil cup is a JB/T7940.2 joint type pressure filling oil cup.

On this basis, in order to reliably lubricate the tapered roller bearing more environmentally and in an anti-leakage manner, the preferable points are: the bearing 4 is lubricated by grease. Specifically, grease should be applied to the bearings before the bearing housing end cap 2 is first installed. The amount of the organic silicon compound is controlled according to 1/3-1/2 of the volume of the void. The preferred points are: the lubricating grease is calcium-based lubricating grease or lithium-based lubricating grease. Specifically, GB/T491 calcium-based lubricating grease or No. 3 industrial lithium-based lubricating grease is generally selected as the lubricating material. Through the experiment, the maintenance period of the transmission bearing box of the utility model is generally half a year, (the running time is not more than 800 hours). If the operation is normal, during maintenance: a predetermined amount of grease is directly added from the grease injection hole 10 without opening the bearing housing cover. The overhaul period is generally one year (the running time does not exceed 1600 hours). During overhaul, the end cover 2 of the bearing box is opened for overhaul, and the overhaul process is 'cleaning each part → replacing the rolling bearing according to the situation → reassembling the bearing box → adding specified amount of lubricating grease → ensuring reasonable axial clearance and reliable fastening bolt'. Wherein, the tapered roller bearing 4 can be continuously used in the first overhaul period if no obvious abrasion exists; however, after one and a half years of continuous use (operation time of 2400 hours or more), the tapered roller bearing must be replaced with a new one. And moreover, the grease injection holes 10 which are obliquely arranged can conveniently complete the operation of supplementing lubricating grease to the tapered roller bearing 4 under the condition of not disassembling the bearing box end cover 2, and the operation is simple and convenient.

In order to adaptively adjust the axial clearance between the bearing box body 1 and the bearing box end cover 2, further: an asbestos plate gasket and a tin-plated iron sheet gasket are arranged between the bearing box body 1 and the bearing box end cover 2. The total number of tin-plated iron inserts was determined from the axial clearance and the measurements. Wherein, the asbestos gasket plays sealed effect, and galvanized iron sheet gasket can play the effect of adjusting the axial clearance through the increase and decrease of gasket quantity, and elasticity asbestos gasket and galvanized iron sheet gasket combined action can also play the effect of elastic sealing connection.

The utility model discloses specifically use:

application one, see fig. 2: the utility model discloses general type transmission bearing case can be used to the walking wheel pair system of railway locomotive or vehicle, installs promptly between automobile body and wheel pair 17 transmission shaft, and under this kind of mounting structure, transmission bearing case box is often used for the connection support between wheel pair 17 and the automobile body to use.

Application two, see fig. 3: the utility model discloses general type driving bearing case still can be used to the walking power transmission system of railway locomotive, and the one end of the power interface of driving bearing case meshes with the driven gear in the axletree gear box 18 mutually promptly, and the power transmission shaft who leads to with the derailleur is connected to the other end, and under this kind of mounting structure, the purpose of power transmission can be regarded as to the driving bearing case.

Application three, see fig. 4: the utility model discloses general type transmission bearing case still can be used to the power transmission system of derailleur test bench, under this kind of mounting structure: the universal transmission bearing box can simulate a hydraulic motor to be used for engineering machinery work process tests. In this application example: one end of the general transmission bearing box, which is connected with the power transmission 12 of the loaded railway locomotive, is limited by mechanical space, and a fastener of a special axle box cover 6 and a GB/T70.1 cylindrical head hexagon socket head bolt 7 of the special bearing box cover 6 is adopted to realize compact installation; this ensures a reliable connection in a small mechanical space. In addition, a driven belt pulley 14 is installed at the end part of the transmission shaft 3 of the universal transmission bearing box on the right side of the position of FIG. 4, the driven belt pulley 14 is connected with a driving belt pulley 15 through a V-belt, and the driving belt pulley 15 is installed on a power output shaft of a motor 16 of the test bed; therefore, the transmission bearing box can replace a hydraulic motor transmission by installing the driving belt pulley 15 and the driven belt pulley 14 with different transmission ratios, and plays a role in outputting power and changing speed of the hydraulic motor. Furthermore, the transmission shafts of the (right) first transmission bearing box and the (left) second transmission bearing box are coaxially and fixedly connected into a whole through a universal joint transmission shaft assembly 13, the electric motor 16 of the test bed at the far end can be changed in speed through belt transmission, and power is transmitted through the transmission bearing boxes, so that after the torque of the electric motor 16 of the test bed is changed in speed, the output power is effectively transmitted to the power transmission 12 of the railway machine, the purpose of testing the locomotive running system rack is well achieved, the speed changer is saved, and the economic expenditure of arranging parts such as a hydraulic motor is also reduced.

From the above description it can be found that: first, the utility model discloses private bearing case lid 6 is in coordination with the counter bore formula mounting structure of hexagon socket head cap screw 7, as shown in FIG. 4, can realize the utility model discloses the integral type near-end of drive bearing case and rail locomotive power transmission is reliably connected, can realize the utility model discloses installation space has been saved in the compactification installation of drive bearing case. Secondly, the utility model discloses an air cooling, than the liquid lubrication heat dissipation, no seepage, environmental protection more. Moreover, compared with the T-shaped exhaust hole processed by the bolt in the background technology, the threaded connection structure of the L-shaped radiating pipe and the radiating through hole has simpler process and is easy to realize; the combined action of the return bend cooling tube of L type structure in coordination, the L type dog-ear structure of cooling tube has dust-stopping, dust fall prevention, heat dissipation synergistic effect, through the experiment, the utility model discloses air cooling heat dissipation transmission bearing box, the operation temperature rise can keep at 20 ℃ -26 ℃.

To sum up, the utility model has the advantages of simple structure, convenient assembly and disassembly, low manufacturing cost, low noise, good sealing, good heat dissipation and outstanding environmental protection. The method has wide application prospect in the fields of coal mine machinery, hoisting and transporting machinery, petroleum machinery, railway machinery and the like. In addition, when the transmission bearing box is applied in the mode of the graph 4, for example, a railway engineering mechanical test is carried out, the transmission bearing box can also be used for simulating a hydraulic motor, the speed change function before power input is realized, and the function of speed change power transmission of the hydraulic motor can be realized by installing belt pulleys or gears with different rotating speed ratios.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The above-mentioned embodiments are merely preferred embodiments of the present invention, and not intended to limit the scope of the present invention, so that all equivalent changes made by the contents of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims (4)

1. Dry-type air cooling heat dissipation transmission bearing case includes bearing box body (1), bearing box end cover (2), wears to locate bearing box transmission shaft (3), establishes at the bearing box this internally and supports transmission shaft pivoted bearing (4), its characterized in that: the bearing box end cover (2) comprises a universal bearing box cover (5) and a special bearing box cover (6); the outer edge of the cover body of the special bearing box cover (6) is provided with a flange type connecting flange (601); the disk body of the flange type connecting flange (601) is provided with a flange type connecting through hole (602); the special bearing box cover (6) is also provided with a step countersunk through hole (603) for connecting the bearing box body (1); the nut of the cylindrical head hexagon socket head cap screw (7) is completely accommodated into the step countersunk head through hole (603) to axially fasten and connect the special bearing box cover (6) and the bearing box body (1) into a whole; the box body of the bearing box body (1) is also provided with a heat dissipation through hole (8), the heat dissipation through hole (8) is arranged in a direction vertical to the central line of the transmission shaft (3), the inner side wall of the heat dissipation through hole (8) is provided with an internal thread, and a heat dissipation pipe (9) is arranged in a screwing fit manner with the internal thread of the heat dissipation through hole; the radiating pipe (9) is bent to be L-shaped for radiating and blocking dust.

2. The dry air-cooled heat-dissipating bearing housing according to claim 1, wherein: the bearing (4) is a single-row tapered roller bearing; the bearing box body (1) is provided with a grease injection hole (10) close to the side wall of the box body of the tapered roller bearing; the grease injection channel of the grease injection hole (10) inclines towards the bearing gap of the tapered roller bearing; the grease injection hole (10) is provided with a joint type pressure injection oil cup (11).

3. The dry air-cooled heat-dissipating bearing housing according to claim 2, wherein: the bearing (4) is lubricated by lubricating grease, and the lubricating grease is calcium-based lubricating grease or lithium-based lubricating grease.

4. A dry air-cooled heat-dissipating bearing housing according to claim 1 or 3, wherein: an asbestos plate liner and a tin-plated iron sheet liner are arranged between the bearing box body (1) and the bearing box end cover (2).

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