阅读说明：本技术 一种轴承加热装置 (Bearing heating device ) 是由 孙世龙 郭少林 蔡敏 于 2019-10-11 设计创作，主要内容包括：本发明公开一种轴承加热装置,内感应线圈和外感应线圈之间的环形间隙中放置待加热的轴承；内感应线圈位于轴承内圈之内,靠近轴承内圈,用于对轴承的内圈电磁加热；外感应线圈位于轴承外圈之外,靠近轴承外圈,用于对轴承的外圈电磁加热；内感应线圈与轴承的内圈、以及外感应线圈与轴承的外圈之间均通过电磁感应实现加热,内感应线圈和外感应线圈本身并不产生热量,利用电磁感应原理使轴承发热,加热效率更高；内感应线圈和外感应线圈由控制系统独立控制发热状态,两个线圈分别单独调节对轴承内圈与外圈的加热程度,实现精准控制加热,加热过程不需要空气作为介质,因此无需吹风,避免灰尘进入轴承内造成磨损。(The invention discloses a bearing heating device.A bearing to be heated is placed in an annular gap between an inner induction coil and an outer induction coil; the inner induction coil is positioned in the bearing inner ring and close to the bearing inner ring and is used for electromagnetically heating the inner ring of the bearing; the outer induction coil is positioned outside the bearing outer ring and close to the bearing outer ring and is used for electromagnetically heating the outer ring of the bearing; the inner induction coil and the inner ring of the bearing and the outer induction coil and the outer ring of the bearing are heated through electromagnetic induction, the inner induction coil and the outer induction coil do not generate heat, the bearing is heated by the electromagnetic induction principle, and the heating efficiency is higher; interior induction coil and outer induction coil are by the control system independent control state of generating heat, and two coils adjust the heating degree to bearing inner race and outer lane respectively alone, realize accurate control heating, and the heating process does not need the air as the medium, consequently need not to blow, avoids the dust to get into and causes wearing and tearing in the bearing.)

1. the bearing heating device is characterized by comprising an inner induction coil (1) in a circular ring shape and an outer induction coil (2) in a circular ring shape, wherein a bearing to be heated is placed in an annular gap between the inner induction coil (1) and the outer induction coil (2);

The inner induction coil (1) is positioned in the bearing inner ring and used for electromagnetically heating the inner ring of the bearing; the outer induction coil (2) is positioned outside the outer ring of the bearing and used for electromagnetically heating the outer ring of the bearing;

the inner induction coil (1) and the outer induction coil (2) are independently controlled by a control system to generate heat.

2. The bearing heating device according to claim 1, characterized in that the outer parts of the inner induction coil (1) and the outer induction coil (2) are surrounded and covered by a protective cover (3), the upper surface of the protective cover (3) is provided with an annular opening for taking and placing the bearing, and a protective cover plate (4) is arranged at the opening.

3. Bearing heating device according to claim 2, characterized in that the bottom of the inner induction coil (1) and the outer induction coil (2) is provided with a support base (5), which support base (5) supports the heated bearing;

The supporting base (5) is in a step shape, so that the centers of the inner induction coil (1) and the outer induction coil (2) which are not equal in width are at the same height.

4. Bearing heating device according to claim 3, characterized in that the support bases (5) are provided in three, evenly distributed in the circumferential direction.

5. Bearing heating device according to claim 3, characterized in that the protection shield (3) and the support base (5) are supported by a support platform (6).

6. Bearing heating device according to claim 5, characterized in that the upper surface of the support platform (6) is provided with a nylon shim plate (7).

7. A bearing heating device according to claim 3, characterized in that temperature sensors are arranged at the inner induction coil (1) and the outer induction coil (2), respectively, and temperature detection signals are transmitted to a control system.

Technical Field

The invention relates to the technical field of mechanical assembly, in particular to a bearing heating device.

Background

The permanent magnet direct-drive wind driven generator consists of a stator, a rotor, a fixed shaft, a rotating shaft, a bearing and other key components, wherein the bearing is used as a key part of the generator and directly influences the service life and the operation condition of the generator.

the bearing needs to be heated and then subjected to hot charging treatment in the shafting assembly process, and the heating mode of the bearing directly influences the heating effect of the bearing. At present, the bearing is heated in the field mostly by adopting a heating furnace, the bearing is integrally placed in the heating furnace, the bearing is heated by heat generated by an electric heating wire in the heating furnace, the heating mode of the bearing is heat conduction, the temperature of the whole interior of the heating furnace is kept consistent, the heating of the bearing by adopting the heating furnace has the defects of low efficiency and low heating speed, and only the inner ring and the outer ring of the bearing can keep the same temperature, so that the assembly is not facilitated; set up circulating fan in the heating furnace heat and make the heat evenly distributed in the air, the fan blows and can blow in dust, foreign matter inside the bearing, and bearing wear accelerates, influences bearing quality and whole aerogenerator's life.

For those skilled in the art, how to accurately control heating of the inner ring and the outer ring of the bearing is a technical problem to be solved at present.

Disclosure of Invention

The invention provides a bearing heating device, which can accurately control the heating of an inner ring and an outer ring of a bearing and avoid dust pollution, and the specific scheme is as follows:

A bearing heating device comprises an inner induction coil in a circular ring shape and an outer induction coil in a circular ring shape, wherein a bearing to be heated is placed in an annular gap between the inner induction coil and the outer induction coil;

The inner induction coil is positioned in the bearing inner ring and used for electromagnetically heating the inner ring of the bearing; the outer induction coil is positioned outside the outer ring of the bearing and used for electromagnetically heating the outer ring of the bearing;

the inner induction coil and the outer induction coil are independently controlled in a heating state by a control system.

Optionally, the outer portions of the inner induction coil and the outer induction coil are surrounded by a protective cover, an annular opening for taking and placing the bearing is formed in the upper surface of the protective cover, and a protective cover plate is arranged at the opening.

Optionally, a support base is arranged at the bottom of the inner induction coil and the outer induction coil, and the support base supports the heated bearing;

The supporting base is in a step shape, so that the centers of the inner induction coil and the outer induction coil which are not equal in width are at the same height.

Optionally, the number of the support bases is three, and the support bases are uniformly distributed in the circumferential direction.

Optionally, the shield and the support base are supported by a support platform.

Optionally, a nylon pad is disposed on the upper surface of the support platform.

Optionally, a temperature sensor is respectively disposed at the inner induction coil and the outer induction coil, and transmits a temperature detection signal to the control system.

The invention provides a bearing heating device, which comprises an inner induction coil and an outer induction coil, wherein the inner induction coil and the outer induction coil are both circular rings, and a bearing to be heated is placed in an annular gap between the inner induction coil and the outer induction coil; the inner induction coil is positioned in the bearing inner ring and close to the bearing inner ring and is used for electromagnetically heating the inner ring of the bearing; the outer induction coil is positioned outside the bearing outer ring and close to the bearing outer ring and is used for electromagnetically heating the outer ring of the bearing; the inner induction coil and the inner ring of the bearing and the outer induction coil and the outer ring of the bearing are heated through electromagnetic induction, the inner induction coil and the outer induction coil do not generate heat, the bearing is heated by the electromagnetic induction principle, and the heating efficiency is higher; interior induction coil and outer induction coil are by the control system independent control state of generating heat, and two coils adjust the heating degree to bearing inner race and outer lane respectively alone, realize accurate control heating, and the heating process does not need the air as the medium, consequently need not to blow, avoids the dust to get into and causes wearing and tearing in the bearing.

Drawings

in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic front view of a bearing heating device according to the present invention;

Fig. 2 is a schematic top view of a bearing heating device according to the present invention.

The figure includes:

The device comprises an inner induction coil 1, an outer induction coil 2, a protective cover 3, a protective cover plate 4, a supporting base 5, a supporting platform 6 and a nylon base plate 7.

Detailed Description

The invention has the core that the invention provides the bearing heating device which can accurately control the heating of the inner ring and the outer ring of the bearing and avoid dust pollution.

In order to make the technical solution of the present invention better understood by those skilled in the art, the bearing heating device of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

fig. 1 is a schematic front view of a bearing heating device provided in the present invention, and fig. 2 is a schematic top view of the bearing heating device provided in the present invention; the bearing heating device comprises an inner induction coil 1 in a circular ring shape and an outer induction coil 2 in a circular ring shape, wherein the inner induction coil 1 and the outer induction coil 2 have a certain height; the radius of the inner induction coil 1 is smaller than that of the outer induction coil 2, the inner induction coil 1 is arranged in the inner ring of the outer induction coil 2, the circle centers of the inner induction coil 1 and the outer induction coil 2 are overlapped, a circular gap is formed between the inner induction coil 1 and the outer induction coil 2, the inner induction coil 1 is positioned on the inner wall of the circular gap, and the outer induction coil 2 is positioned on the outer wall of the circular gap; a bearing to be heated is placed in the annular gap between the inner induction coil 1 and the outer induction coil 2.

The bearing is provided with an inner ring and an outer ring which rotate relatively, the inner induction coil 1 is positioned in the inner ring of the bearing, and the inner induction coil 1 is close to the inner ring of the bearing and used for electromagnetically heating the inner ring of the bearing; the outer induction coil 2 is positioned outside the outer ring of the bearing, and the outer induction coil 2 is close to the outer ring of the bearing and used for electromagnetically heating the outer ring of the bearing; interior induction coil 1 and outer induction coil 2 do not themselves generate heat, when interior induction coil 1 and outer induction coil 2 circular telegram, utilize the electromagnetic induction principle to make the bearing directly generate heat, and the heat is produced by the bearing, need not be via media such as air.

The electromagnetic induction heating is to generate an alternating magnetic field, when a ferrous container is placed on the container, the surface of the container cuts alternating magnetic lines of force to generate alternating current (namely eddy current) on the metal part at the bottom of the container, the eddy current enables iron atoms at the bottom of the container to move randomly at high speed, and the atoms collide and rub with each other to generate heat energy, thereby achieving the effect of heating articles. Because the iron container generates heat, the heat conversion rate is particularly high and can reach 95 percent at most, and the method is a direct heating mode.

According to the bearing heating device, the heating states of the inner induction coil 1 and the outer induction coil 2 are independently controlled by the control system, the working states of the inner induction coil 1 and the outer induction coil 2 are respectively controlled, the inner ring and the outer ring of the bearing are respectively and independently heated, and the heating degrees of the inner ring and the outer ring of the bearing are accurately controlled.

the heating temperature relation between the bearing inner ring and the bearing outer ring is as follows: the heating temperature of the bearing is 110 ℃, and the highest temperature of the bearing in the heating process is not more than 120 ℃. In order to ensure the heating effect of the bearing and the quality of the bearing in the heating process, the heating device can ensure the inner ring of the bearing, and the heating temperature of the outer ring is not less than the temperature of the inner ring of the bearing, so that the bearing roller is not extruded because the expansion amount of the inner ring of the bearing is greater than that of the outer ring.

The bearing is heated by adopting the electromagnetic induction principle, and air is not required to be used as a medium for heat transfer, so that air blowing is not required to be arranged, circulating air is not required in the heating process of the bearing by using the device, and the risk that dust and foreign matters are brought into the bearing by the circulating air is avoided.

On the basis of the scheme, the outer parts of the inner induction coil 1 and the outer induction coil 2 are surrounded and covered by the protective cover 3, the inner induction coil 1 and the outer induction coil 2 are respectively surrounded by the protective cover 3 from the inner side, the outer side and the top, the inner induction coil 1 and the outer induction coil 2 are positioned between two vertical side walls of the protective cover 3, the protective cover 3 plays a role in heat preservation and protection for the inner induction coil 1 and the outer induction coil 2, external dust is prevented from entering the bearing, and heat is prevented from being diffused to the outside.

The upper surface setting of protection casing 3 is used for getting the annular opening of ring shape of putting the bearing, the opening part sets up protective cover plate 4, as shown in fig. 1, 3 upper surfaces of protection casing are two annular ring pieces, certain height has, be located induction coil 1 and outer induction coil 2 directly over respectively, induction coil 1 and outer induction coil 2's upper surface in the protection respectively, form an annular clearance of ring shape between two rings of protection casing 3 upper surface, be used for getting and putting the bearing, the position of inner induction coil 1 and outer induction coil 2 and protection casing 3 keeps relatively fixed, put the bearing into during the heating, take out the bearing after the heating is accomplished.

the above structure is only a preferred embodiment, and the shield 3 can be moved while keeping the position of the bearing still, and the structure in which the bottom of the shield 3 is hollowed out and the shield 3 is covered on the bearing from top to bottom when heating, and these specific embodiments are all included in the scope of the present invention.

The bottom of interior induction coil 1 and outer induction coil 2 sets up support base 5, and support base 5 is used for supporting interior induction coil 1 and outer induction coil 2, supports the bearing that base 5 supported simultaneously and is heated. As shown in fig. 1, the supporting base 5 has a step shape, so that the centers of the inner induction coil 1 and the outer induction coil 2 having unequal widths are at the same height.

The bearing size of the large-scale wind driven generator is large, the widths of the inner ring and the outer ring of the bearing adopted by the large-scale wind driven generator are not equal, the vertical height of the inner induction coil 1 is matched with the width of the inner ring of the bearing, the vertical height of the outer induction coil 2 is matched with the width of the outer ring of the bearing, and the heights of the inner induction coil 1 and the outer induction coil 2 are not equal.

The width of the inner ring of the bearing is large, the inner ring is supported by a supporting base 5, the outer ring of the bearing is suspended in the air, and in order to enable the inner induction coil 1 to be over against the inner ring of the bearing to achieve effective heating, the inner induction coil 1 needs to have a higher height and is achieved through a stepped structure of the supporting base 5; the centers of the inner induction coil 1 and the outer induction coil 2 are at the same height, and are at the same height as the centers of the inner ring and the outer ring of the bearing.

As shown in fig. 2, three support bases 5 are provided in the present invention, a cylindrical bar block is provided on the support base 5, and a step surface is provided on the upper surface; three support bases 5 are evenly distributed in the circumferential direction, the included angle between two adjacent support bases 5 and the circle center connecting line is 120 degrees, stable supporting force is provided for the bearing, the number of the support bases 5 is not only three, and more support bases 5 can be adopted and arranged at intervals. The volume of the supporting structure can be reduced by adopting the structure, and the cylindrical structural arrangement can also be adopted, and the specific embodiments are all included in the protection scope of the invention.

Specifically, the protection cover 3 and the support base 5 are supported by the support platform 6, the upper surface of the support platform 6 is a plane, the bottom of the support platform is provided with support legs for supporting, and the support base 5 and the protection cover 3 are both supported by the support platform 6.

In order to play a role in buffering, a nylon base plate 7 is arranged on the upper surface of the supporting platform 6, so that damage caused by impact of a rigid structure is avoided; the nylon backing plate 7 is laid on the supporting platform 6 and can be replaced in time.

Temperature sensors are respectively arranged at the inner induction coil 1 and the outer induction coil 2, temperature detection signals are transmitted to a control system, and the temperature of the inner ring and the temperature of the outer ring of the bearing are detected in real time through the temperature sensors; and the independent heating control of the inner ring and the outer ring of the bearing is realized through the two heating coils. In the heating process, the requirement of the temperature difference between the inner ring and the outer ring of the bearing is set, temperature detection is carried out through a plurality of temperature sensors, when the temperatures at different positions exceed a set temperature value, two heating coils automatically adjust, the heating coils automatically stop when the temperature is high, heating continues when the temperature is low, and heating continues to be carried out together when the temperature is uniform; the heating process ensures that the temperature of the bearing outer ring is not less than that of the bearing inner ring, thereby ensuring that the bearing roller is not extruded because the expansion amount of the bearing inner ring is greater than that of the outer ring.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.