阅读说明：本技术 一种脉动流强化冷却轴承座装置 (pulsating flow enhanced cooling bearing seat device ) 是由 王军 陈浩 马李琛 侯宇 林小龙 李彪 刘炜 陈宁 于 2019-11-28 设计创作，主要内容包括：本发明公开了一种脉动流强化冷却轴承座装置,所述脉动流强化冷却轴承座装置包括密封圈、轴承端盖、垫圈、整体式轴承座、轴承和轴套,所述整体式轴承座的两端分别通过轴承套接在主轴上,所述轴承靠近所述整体式轴承座的内侧设置有轴套,所述整体式轴承座的两端外侧设置有所述轴承端盖,所述轴承端盖与主轴之间通过密封圈密封,所述整体式轴承座与轴承端盖之间设置有所述垫圈；所述带螺旋肋片的轴套镜像对称的套接在主轴上,冷却水箱的两端设置有接口,所述接口通过卡套接头及管路连接到所述整体式轴承座上；所述空腔内填充有冷却介质,所述整体式轴承座的中部下表面开设有冷却介质出口。有益效果为：具有结构简单、冷却换热效率高、安装维护方便、无需额外动力源的特点。(The invention discloses pulsating flow enhanced cooling bearing pedestal devices, which comprise a sealing ring, bearing end covers, gaskets, an integral bearing pedestal, a bearing and a shaft sleeve, wherein two ends of the integral bearing pedestal are respectively sleeved on a main shaft through the bearing, the bearing is provided with the shaft sleeve close to the inner side of the integral bearing pedestal, the bearing end covers are arranged on the outer sides of the two ends of the integral bearing pedestal, the bearing end covers and the main shaft are sealed through the sealing ring, the gaskets are arranged between the integral bearing pedestal and the bearing end covers, the shaft sleeves with spiral fins are sleeved on the main shaft in a mirror symmetry manner, two ends of a cooling water tank are provided with interfaces, the interfaces are connected to the integral bearing pedestal through a clamping sleeve joint and a pipeline, a cooling medium is filled in a cavity, and the lower surface of the middle part of the integral bearing pedestal is provided with a cooling medium outlet.)

The pulsating flow enhanced cooling bearing pedestal device is characterized by further comprising a cooling water tank, a clamping sleeve joint and shaft sleeves with spiral fins, wherein the two shaft sleeves with the spiral fins are sleeved on the main shaft in opposite spiral directions and are in mirror symmetry, interfaces are arranged at two ends of the cooling water tank and are connected to a cooling medium inlet on the integral bearing pedestal through the clamping sleeve joint and a pipeline, a cooling medium is filled in the cavity, and a cooling medium outlet is formed in the lower surface of the middle of the integral bearing pedestal.

2. The kinds of pulsating flow enhanced cooling bearing block device of claim 1, wherein the main shaft passes through the bearing block, closed heat dissipation cavities are formed inside the integrated bearing block through end covers at two sides, and a cooling medium inlet is opened at the middle upper part of the integrated bearing block.

3. The kinds of pulsating flow enhanced cooling bearing pedestal device of claim 2, further comprising a cooling coil pipe, wherein the cooling coil pipe is disposed in the cooling water tank, the left and right ends of the cooling coil pipe are respectively connected to the joints at the two ends of the tank body, the middle part of the cooling coil pipe is connected with a three-way pipe, and outlets of the three-way pipe are connected with the cooling medium outlet through pipelines.

4. The kinds of pulsating flow enhanced cooling bearing pedestal device of claim 1, wherein the upper portion of the cooling water tank is an open structure, and a cooling water tank discharge port is provided at the lower portion of the cooling water tank.

5. The pulsating flow enhanced cooling bearing pedestal device of any one of claims 1-5 to , wherein the cooling medium is a lubricating oil.

6. The kinds of pulsating flow enhanced cooling bearing block device of claim 1, wherein a sealing ring is disposed between the side of said integrated bearing block near said shaft sleeve with spiral fins and the main shaft, and a cavity formed inside said integrated bearing block wraps the main shaft.

7. The kind of pulsating flow enhanced cooling bearing pedestal device of claim 7, wherein said cooling medium is water.

8. The kinds of pulsating flow enhanced cooling bearing block device of claim 1, wherein a plurality of said cooling medium inlets are arranged at both ends of said integrated bearing block along the circumferential direction, and said cooling medium outlets are arranged at the middle of said integrated bearing block along the circumferential direction.

9. The kind of pulsating flow enhanced cooling bearing seat device of claim 1, wherein the cooling medium is air.

Technical Field

The invention relates to the technical field of bearing seat and shaft cooling, in particular to pulsating flow enhanced cooling bearing seat devices suitable for a high-temperature fan.

Background

The centrifugal fan is common gas conveying devices, is widely applied to various industries, mechanical energy of an impeller is converted into kinetic energy for conveying gas inside the centrifugal fan, shaft power is input into the centrifugal fan through a transmission device by a motor, the transmission device comprises a main shaft, a bearing seat, a rolling bearing and a coupler, for a high-temperature centrifugal fan, heat of conveyed high-temperature gas is transmitted to the bearing and a generator rotor through the impeller and the main shaft, if effective measures are not taken, the temperature of the bearing and the generator rotor is overhigh, and the normal operation and the service life of equipment are influenced.

In the chinese utility model patent with application number CN201120223303.1, through setting up cooling medium and main shaft direct contact, the main shaft surface is directly flowed through to the cooling medium that flows, realizes the cooling to the main shaft, but the heat transfer area of cooling medium and main shaft is limited, and the heat transfer effect remains steps to be strengthened.

In order to solve the problems of the centrifugal fan device and the high-temperature centrifugal fan device, the heat dissipation of the transmission device must be enhanced or the transmission form must be improved (the heat transmission from the main shaft to the generator rotor is blocked or reduced).

Disclosure of Invention

In order to overcome the defects of the prior art, pulsating flow enhanced cooling bearing seat devices suitable for a high-temperature centrifugal fan are invented, the problems of cooling of a bearing of the high-temperature centrifugal fan and reduction of heat transfer from a main shaft to a generator rotor can be solved more effectively, and the device has the characteristics of simple structure, high efficiency, convenience in installation and maintenance and no need of an additional power source.

In order to realize the heat dissipation of the main shaft in the bearing seat, a shaft sleeve with spiral fins is arranged on the main shaft, the shaft sleeve is in interference fit with the main shaft, the shaft sleeve and the main shaft do not slide relatively when the main shaft rotates, the contact thermal resistance between the shaft sleeve and the main shaft is reduced, the heat is transferred from the main shaft to the shaft sleeve, the heat exchange area between a heat exchange part and a cooling medium is increased due to the fins, the flow field in the cooling cavity is complex in the process of pushing the cooling medium to flow by the shaft sleeve, besides a forward main flow of the spiral direction, short-circuit flow existing between the tops of the fins and the inner wall of the bearing seat is increased, the convection heat exchange is greatly enhanced, and the heat exchange efficiency is improved by .

The copper heat-radiating coil arranged in the water tank is connected with two ends and the middle part of the bearing seat heat-radiating cavity to form two closed cooling loops. The shaft sleeve with the spiral fins selects a proper arrangement mode according to the rotation direction of the main shaft, the shaft sleeve driving the spiral fins to rotate simultaneously when the main shaft rotates is guaranteed, cooling media in the cavity are driven to move from the two sides of the integral bearing seat to the middle part, the cooling media in the cooling cavity absorb heat of the main shaft and the bearing, the temperature is increased, the cooling media flow out from a cooling medium outlet in the middle part of the integral bearing seat under the pushing of the shaft sleeve, the cooling media flow through a cooling coil arranged in an external cooling water tank, the temperature is reduced, the cooling media flow back to the cooling cavity in the bearing seat again through cooling medium inlets arranged on the two sides of the bearing seat, and therefore the circulating cooling.

The cross section of the spiral rib perpendicular to the axis is asymmetric, so that the flow parameters periodically fluctuate in two sides and the middle of the cavity in the bearing seat, particularly in an inlet and an outlet of a cooling medium and a cooling channel connected with the inlet and the outlet of the cooling medium, and the fluctuation of the flow parameters can be transmitted to the cooling coil along with the cooling medium, and the flow parameters including flow rate, pressure and other pulsating flows which periodically change along with time can strengthen the convection heat exchange process to a certain extent at , so that the heat exchange efficiency in the cooling cavity, the heating coil and the cooling channel can be improved.

The invention has the following advantages:

1 through the axle sleeve that adopts to have the spiral fin, utilizes the rotational speed of main shaft, has realized closed cooling cycle, need not external power source, need not to add transmission, simple structure, simple to operate.

2, in the closed circulation, the cooling medium flows through the bearing and the main shaft and is directly contacted with the part to be heat-exchanged, so that the part to be heat-exchanged can be well cooled.

3 the shaft sleeve with the spiral fins is in interference fit with the main shaft, so that the thermal contact resistance is reduced, and the heat of the main shaft can be effectively transferred into the shaft sleeve. The spiral fins on the shaft sleeve increase the heat exchange area inside the cooling cavity and strengthen the cooling effect.

4, the complex flow field in the cooling cavity in the bearing seat in the operation process of the main shaft strengthens the convection heat transfer on the surfaces of the fins. The heat of the high-temperature flue gas transferred to the main shaft through the impeller is transferred to the cooling medium through the shaft sleeve, so that the temperature of the main shaft is effectively controlled, and the excessive heat is prevented from being transferred to the motor rotor through the main shaft.

5 the cross section of the shaft sleeve with the spiral fins is asymmetric, and when the rotating speed of the main shaft is constant, pulsating flow with periodically changed flow parameters can be generated at the outlet of the cooling medium. The structure of the spiral finned sleeve with mirror symmetry can be utilized to superpose the pulsation generated at two sides, increase the pulsation amplitude, generate more stable pulsating flow and obtain more stable enhanced heat exchange effect.

6 the installation direction that sets up the axle sleeve according to the main shaft direction of rotation guarantees when the axle sleeve is rotatory along with the main shaft, promotes the cooling medium of cooling intracavity and flows to the middle part from two surveys to form the negative pressure in cooling chamber both sides, be favorable to the sealed between bearing frame both sides end cover and main shaft.

Description of the drawings:

FIG. 1 is a schematic diagram of the apparatus of the present invention

FIG. 2 shows the arrangement of the spindle sleeve with spiral ribs on the spindle, the center of the cross section of the spindle sleeve being asymmetric

FIG. 3 is a schematic diagram of a second technical solution device

FIG. 4 is a schematic diagram of a third technical solution device

1-cooling water tank, 2-cooling coil, 3-cooling coil outlet, 4-cutting sleeve joint, 5-cooling medium inlet, 6-cooling coil inlet, 7-cooling medium outlet, 8-sealing ring, 9-bearing end cover, 10-gasket, 11-shaft sleeve with spiral fins, 12-oil filler hole, 13-integral bearing seat, 14-shaft sleeve, 15-bearing, 16-main shaft, 17-bearing seat cooling medium inlet, 18-cooling coil outlet, 19-cooling water tank opening, 20-cooling water and 21-cooling water tank discharge opening.

The specific implementation mode is as follows: