CN102678764A - Bearing seat for heat dissipation of rolling bearing - Google Patents

Abstract

The invention discloses a bearing seat for rolling bearing heat dissipation, which comprises a seat body, a bearing hole is arranged on the seat body, the axial direction of the bearing hole is defined as the front-rear direction, and the inner wall surface of the bearing hole is used for connecting with the outer ring of the bearing when in use. The outer cylindrical surface of the bearing hole is corresponding to the matching section extending along the front-to-back direction in a tight fit. There are at least two matching sections of the bearing hole distributed along the front-to-back direction, and the inner wall surface of the bearing hole is arranged between two adjacent matching sections. There are heat dissipation grooves for cooling fluid to flow through, and fluid input channels and fluid output passages connected with the heat dissipation grooves are also provided on the bearing seat. The bearing block for heat dissipation provided by the present invention is easy to use, and the cooling and heat dissipation of the rolling bearing can be realized by continuously circulating the input of low-temperature cooling fluid and the output of high-temperature cooling fluid in the cooling pipeline formed by the heat dissipation groove and the outer ring of the bearing, thereby improving the working environment of the rolling bearing .

Description

Bearing seat for heat dissipation of rolling bearing

technical field

The invention belongs to the technical field of heat dissipation of bearings, and in particular relates to a bearing seat for heat dissipation of a high-speed and heavy-duty rolling bearing.

Background technique

Rolling bearings will generate a lot of heat due to friction during operation. In conventional designs, this heat will be dissipated to the outside through the circulation of lubricating oil (grease) and heat conduction of the bearing seat, so as to ensure the normal operation of rolling bearings at the allowable temperature. When the rolling bearing bears a large load and runs at a high speed (close to the reference speed or limit speed of the bearing) or is in one of the working conditions, the heat generated by the bearing due to friction will increase sharply. The circulation and the heat conduction of the bearing seat cannot dissipate the heat generated by the bearing in time, so that the temperature of the bearing will continue to rise, which will eventually lead to the failure of the lubricant and the damage of the bearing, and cause the entire equipment to not work normally or serious accidents. At present, high-speed and heavy-duty bearings usually use an axial flow fan to blow air to the bearing seat to force heat dissipation under the working conditions of large load and high speed. However, the heat dissipation effect of this method has great limitations, and it also increases the design cost and structure. At the same time, for the components with compact structure, the design of this air cooling effect cannot be realized.

Contents of the invention

The purpose of the present invention is to provide a bearing seat for heat dissipation of rolling bearings, so as to solve the technical problem of poor heat dissipation effect of rolling bearings in the prior art.

In order to achieve the above purpose, the bearing seat for heat dissipation of rolling bearing provided by the present invention adopts the following technical scheme: a bearing seat for heat dissipation of rolling bearing, including a seat body, a bearing hole is arranged on the seat body, and the axial direction of the bearing hole is defined as the front and rear direction, The inner wall surface of the bearing hole has a matching section extending along the front and rear directions for tight fitting with the outer cylindrical surface of the bearing outer ring during use. There are at least two fitting sections of the bearing hole distributed along the front and rear directions. On the inner wall of the bearing hole, a heat dissipation groove for cooling fluid to flow is provided between two adjacent matching sections, and a fluid input channel and a fluid output channel connected with the heat dissipation groove are also provided on the bearing seat.

The heat dissipation groove is in the form of a ring structure extending along the circumferential direction of the bearing hole, and there are a plurality of heat dissipation grooves in the ring structure distributed along the front and rear directions.

The top of the bearing hole on the bearing seat is provided with an upper axial communication groove extending along the front-rear direction and communicating with the fluid input channel, and the bottom of the bearing hole on the bearing seat is provided with an upper axial communication groove extending along the front-rear direction and communicating with the The lower axial communication groove connected to the fluid output channel, the upper axial communication groove communicates with the heat dissipation grooves of each annular structure, and the lower axial communication groove communicates with the heat dissipation grooves of each annular structure .

The heat dissipation groove is a spiral structure extending along the axial direction of the bearing hole.

The section of the heat sink is rectangular or semicircular.

The beneficial effect of the present invention is that: in the rolling bearing heat dissipation bearing seat provided by the present invention, a heat dissipation groove for cooling fluid to flow is provided on the inner wall surface of the bearing hole of the seat body between two adjacent matching sections, and the bearing The seat is also provided with a fluid input channel and a fluid output channel connected with the cooling groove, so that when in use, the cooling channel is formed by the cooling channel on the bearing seat and the outer cylindrical surface of the bearing outer ring, and the fluid input channel flows into the cooling channel. The cooling fluid is input, and the cooling fluid flows from the fluid output channel through the cooling pipe. When the cooling fluid flows through the cooling pipe, the heat exchange with the outer ring of the bearing takes away a large amount of heat generated by the friction of the rolling bearing, so as to realize the cooling of the rolling bearing. The cooling device provided by the invention has good cooling effect and is easy to use, and is especially suitable for cooling the rolling bearing under high-speed and heavy-load conditions, and can effectively improve the working environment of the rolling bearing.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of a rolling bearing heat dissipation bearing seat provided by the present invention;

Fig. 2 is a sectional view at B-B place among Fig. 1;

Fig. 3 is a structural schematic diagram of the bearing housing in Fig. 1 when in use;

Fig. 4 is a sectional view at A-A place among Fig. 3;

(The arrows in Figure 3 and Figure 4 indicate the flow direction of the cooling oil).

Detailed ways

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, an embodiment of a bearing seat for heat dissipation of a rolling bearing, the bearing seat 200 in this embodiment includes a seat body, and a bearing hole is arranged on the seat body, and the shaft of the bearing hole The direction is defined as the front-to-back direction, and the inner wall surface of the bearing hole has a fitting section 300 extending along the front-back direction for tight fitting with the outer cylindrical surface of the bearing outer ring during use. The fitting section of the bearing hole in this embodiment is along the There are two front and rear distributions. When in use, the two matching sections of the bearing hole correspond to the front and rear ends of the bearing outer ring respectively. On the inner wall of the bearing hole, a heat dissipation groove for cooling oil to flow is provided between the two adjacent matching sections. 10. The cooling groove 10 has a ring structure extending along the circumferential direction of the bearing hole. There are multiple cooling grooves distributed along the front and rear directions. The cross section of the cooling groove here is rectangular. When used, the cooling grooves of the ring structure Cooperate with the outer ring of the bearing to form a cooling pipe 100. When the cooling oil flows through the cooling pipe, it exchanges heat with the outer ring of the bearing to take away a large amount of heat generated by the rolling bearing due to rolling friction. On the top of the bearing hole on the seat body of the bearing seat 200, an upper axial communication groove 9 extending along the front and rear direction is provided. The upper axial communication groove 9 communicates with the cooling grooves 10 of each annular structure. The bottom of the bearing hole is provided with a lower axial communication groove 17 extending in the front and rear direction, and the lower axial communication groove 17 communicates with the cooling grooves 10 of each annular structure, and a cooling oil input channel 8 and a cooling oil output channel are also provided on the bearing seat 200 Channels, as shown in the figure, the cooling oil input channel 8 is a vertical pipeline structure communicating with the upper axial communication groove, and the cooling oil output channel includes a channel at the bottom of the bearing seat that communicates with the lower axial communication groove. The vertical pipeline 16 and the horizontal pipeline 18 that communicates the vertical pipeline and the external oil circuit.

In this embodiment, a lubricating structure for lubricating the bearing rollers is provided on the seat body of the bearing housing 200 at the front side and the rear side of the fitting section, and the lubricating structure includes lubricating oil communicated with the bearing hole. The input channel 30 and the lubricating oil output channel 15 are provided with a spraying oil pipe 11 in the lubricating oil input channel 30, and one end of the spraying oil pipe 11 is equipped with an oil spray nozzle 13 for spraying lubricating oil to the rollers in the bearing when in use, so The lubricating oil output channel 15 communicates with the transverse pipeline 18 of the cooling oil output channel.

When in use, an external circulating oil circuit 4 is arranged on the bearing seat, and the output end 6 of the external circulating oil circuit 4 communicates with the cooling oil input channel 8 and the lubricating oil input channel 30 through the oil separator 7 arranged outside the bearing seat, and the external circulation The input 19 of the oil circuit 4 is then connected to the transverse pipe 18 of the cooling oil outlet channel. An oil tank 1 and an oil pump 5 are connected in series on the external circulating oil circuit 4, and a heat source for cooling the high-temperature oil output from the cooling oil output channel is also connected in series between the input end 19 and the oil tank 1 on the external circulating oil circuit 4. switch 2.

When in use, when the main shaft 14 and the rolling bearing 12 are put into the bearing hole of the bearing housing 200, the cooling channel 100 is formed by the cooling groove on the bearing housing 200 and the outer ring of the bearing, and the oil pump 5 transfers the cooling/lubricating oil 3 from the oil tank 1 It is sucked out and sent to the oil separator 7 through the external circulating oil circuit 4, and the cooling/lubricating oil is divided into two paths after passing through the oil separator:

(1) Cooling oil circuit

After the cooling oil enters the upper axial communication groove 9 through the cooling oil input channel 8, it is divided into several heat dissipation grooves 10, and these heat dissipation grooves and the outer ring of the bearing form a closed cooling pipeline 100, and the cooling oil flows in the cooling pipeline At the same time, it realizes heat exchange with the outer ring of the bearing, thereby taking away a large amount of heat from the bearing and reducing the temperature of the bearing. The cooling oil enters the lower axial communication groove 17 after reaching the bottom of the bearing through the cooling pipe, and then enters the external circulating oil circuit 4 through the cooling oil output channel.

(2) Lubricating oil circuit

The lubricating oil is sprayed on the rollers through the injection oil pipe 11 in the lubricating oil input channel 30, on the one hand, it lubricates and cools the rollers and raceways of the bearing, and on the other hand, the lubricating oil forms an oil film on the surface of the friction pair to avoid bearing The direct contact between the rollers and the raceway reduces the coefficient of friction, and the lubricating oil flows to the bottom of the bearing seat and then flows into the horizontal pipeline 18 in the cooling oil output channel through the lubricating oil output channel 15, and finally enters the external circulating oil circuit 4.

After the cooling oil and lubricating oil enter the external circulation oil circuit 4 through the horizontal pipeline 18 of the cooling oil output channel, they become low-temperature oil after being cooled by the heat exchanger 2 and enter the oil tank 1. The low-temperature oil in the oil tank 1 is circulated externally by the oil pump 5 The oil circuit is pumped to the cooling oil input channel 8 and the lubricating oil input channel 30, and the low-temperature oil enters the cooling pipeline 100 to cool and dissipate the rolling bearing 12. Then the low-temperature oil becomes high-temperature oil and then flows back to the oil tank 1 again, and the bearing is cooled and radiated and lubricated in a reciprocating manner.

The bearing seat provided in the above embodiment adopts the heat exchange method when used, and the circulating cooling oil and lubricating oil flow in the cooling channel formed by the cooling groove of the bearing seat and the outer ring of the bearing to take away the heat generated by the friction of the rolling bearing, and Dissipate heat to the outside through a heat exchanger. The normal working temperature of the bearing under different working conditions can be maintained by setting the cross-sectional shape and size of the cooling groove, the length of the cooling groove, adjusting the flow rate of the cooling oil and the temperature of the cooling oil on the cooling pipe entering and leaving the bearing seat, so as to ensure the bearing Normal operation under high speed and heavy load conditions.

In the above embodiment, the cooling grooves are in the form of an annular structure extending along the circumferential direction of the bearing hole. There are a plurality of cooling grooves in the ring structure distributed in the bearing hole along the front and rear directions, and each cooling groove passes through the upper axial communication groove and the lower axial direction. The communication grooves are connected to each other so that the heat dissipation grooves are in a parallel state, and the cooling oil can flow through each heat dissipation groove, so that the amount of cooling oil flowing into the heat dissipation grooves is more, and the heat exchange between the cooling oil and the outer ring of the bearing is increased. In other embodiments, the cooling groove can also adopt other structures, such as adopting a spiral structure extending axially along the bearing hole, one axial end of the spiral cooling groove communicates with the cooling oil input channel, and its axial The other end communicates with the cooling oil output channel, and at this time, the upper and lower axial communication grooves are not provided. When the cooling groove adopts a spiral structure, the flow of cooling oil entering the bearing seat will be reduced, but because the flow path of the cooling oil is extended, the heat exchange time between the cooling oil and the outer ring of the bearing is increased, and the working temperature of the bearing can also be reduced. Effect.

In the above-mentioned embodiments, the cooling grooves of the annular structure are connected through the upper axial communication groove and the lower axial communication groove. And the cooling oil output channel is connected.

The cross section of the heat sink in the above embodiments is rectangular, and in other embodiments, the cross section of the heat sink can also adopt other structures, such as a semicircular or triangular structure.

The two matching sections on the inner wall surface of the bearing hole of the bearing seat in the above embodiment respectively cooperate with the front and rear ends of the bearing outer ring. In other embodiments, the matching sections on the inner wall surface of the bearing hole of the bearing seat can be If there are more than two sections, heat dissipation grooves are provided between every two adjacent matching sections.

In the above embodiment, because the amount of cooling oil and the amount of lubricating oil differ greatly, an oil separator is used. In other embodiments, the oil separator may not be selected, and the input end of the external circulating oil circuit communicates with the cooling oil input channel and the lubricating oil input channel through different flow control valves, so as to realize the cooling oil and lubricating oil. The control of the flow rate ensures the effect of cooling and lubricating the rolling bearing.

In the above embodiment, preferably, a lubricating oil input channel and a lubricating oil output channel are respectively provided on the front and rear sides of the matching section of the bearing hole. In other embodiments, the lubricating oil input channel and the lubricating oil output channel may also be provided only on the front side or the rear side of the mating section.

Claims (5)

1. A bearing seat for heat dissipation of a rolling bearing, including a seat body, a bearing hole is arranged on the seat body, the axial direction of the bearing hole is defined as the front and rear direction, and the inner wall of the bearing hole has an outer ring for contact with the outer ring of the bearing when in use. The matching section extending along the front-to-back direction that corresponds to the tight fit of the cylindrical surface is characterized in that: there are at least two matching sections of the bearing hole distributed along the front-to-back direction, and on the inner wall surface of the bearing hole between two adjacent matching sections A heat dissipation groove for cooling fluid to flow through is arranged between them, and a fluid input channel and a fluid output channel connected with the heat dissipation groove are also opened on the bearing seat. 2. The bearing housing for heat dissipation of a rolling bearing according to claim 1, wherein the heat dissipation grooves are in the form of a ring structure extending along the circumference of the bearing hole, and there are a plurality of heat dissipation grooves in the ring structure distributed along the front and rear directions. 3. The bearing seat for heat dissipation of rolling bearing according to claim 2, characterized in that: the top of the bearing hole on the seat body is provided with an upper axial communication groove extending along the front and rear direction and communicating with the fluid input channel , the bottom of the bearing hole on the base is provided with a lower axial communication groove extending along the front and rear direction and communicating with the fluid output channel, and the upper axial communication groove communicates with the cooling grooves of each ring structure, so The above-mentioned lower axial communication grooves communicate with the heat dissipation grooves of each ring structure. 4. The bearing seat for heat dissipation of a rolling bearing according to claim 1, wherein the heat dissipation groove is a spiral structure extending along the axial direction of the bearing hole. 5. The bearing seat for heat dissipation of a rolling bearing according to claim 1, wherein the cross section of the heat dissipation groove is rectangular or semicircular.

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