CN201038881Y

CN201038881Y - An improved YFJ muscle outside cooling asynchronous motor bearing

Info

Publication number: CN201038881Y
Application number: CNU2007200697374U
Authority: CN
Inventors: 孙丹丹
Original assignee: Shanghai Electric Group Shanghai Electric Machinery Co Ltd
Current assignee: Shanghai Electric Group Shanghai Electric Machinery Co Ltd
Priority date: 2007-05-11
Filing date: 2007-05-11
Publication date: 2008-03-19
Anticipated expiration: 2017-05-11

Abstract

The utility model relates to a modified outer cooling asynchronous motor bearing in YFJ serial rib, which comprises a bearing ball, an internal bearing cover, a bearing bush, an external bearing cover, a labyrinth ring and an oil thrower wheel. The utility model is characterized in that the oil thrower wheel is connected with the labyrinth ring and a shaft by sliding into clearance, and the oil thrower wheel has the same inner circle diameter with the labyrinth ring; simultaneously the labyrinth ring is arranged right besides the oil thrower wheel; the labyrinth ring and the oil thrower wheel are positioned through a button to form a linkage and are locked and positioned through the external bearing cover; the external bearing cover is provided with a spigot on which a ring that can cover an area from the edge of the spigot to the border of the inner circle is arranged. As adopts the novel structural connection between the oil thrower wheel, the labyrinth ring and the shaft, and the a round ring is further added on the external bearing cover, the utility model can overcome a plurality of problems of the existing outer cooling asynchronous motor bearings of YFJ serial rib. The utility model not only can effectively prevent foreign matters from entering into the inner cavity of the bearing, but also can provide an applicable technical support for general round rings which are arranged on the different external bearing covers of the IP54 and the IP55 motors.

Description

A kind of follow-on YFJ series muscle external cooling asynchronous motor bearing

Technical field

The utility model relates to a kind of bearing of motor, and especially a kind of follow-on YFJ series muscle external cooling asynchronous motor bearing belongs to rolling bearing method for designing class.

Background technology

The totally-enclosed compact muscle external cooling high-voltage three-phase asynchronous motor of YFJ series, being the last word of our company's the nineties, is to introduce advanced foreign technologies and the manufacturing and designing experience of high-voltage three-phase asynchronous motor series steady in a long-term and the optimization series set up over more than 50 year in conjunction with a large amount of.And derived YBFJ frequency control threephase asynchronous.These series of products have that volume is little, in light weight, compact conformation, vibration and noise is low, good reliability, advantage such as convenient for installation and maintenance, are the high performance high-voltage three-phase asynchronous motors of a new generation.

Because in the design, the interior circle of the labyrinth ring of the bearing (seeing accompanying drawing 1) that uses is of a size of at present

, the axle that is mated is gone up these shelves and is of a size of

, to be worked into minimum dimension be φ 129.874 to circle in labyrinth ring, when cylindrical is worked into full-size and is φ 129.855 on the axle, has only the 0.019mm gap between the two.Obviously, on the axle tolerance dimension less than in the labyrinth ring circle size.But car fan palace end face again after the labyrinth ring course of processing is to be swaged into circle earlier mills at last and cuts radial slot and end face groove, cuts the distortion that also causes labyrinth ring easily through milling like this, make actual in the circle size decreases, cause and dimensioning deviation to some extent.

Equally, circle is of a size of in the disc

, the axle that is mated is gone up these shelves and is of a size of

To be worked into minimum dimension be φ 130.00 to circle in disc, and when cylindrical was worked into full-size and is φ 130.04 on the axle, both just had the interference of 0.04mm at this moment.So labyrinth ring and disc can not directly be placed on the axle.Must heat nearly 2 hours by advanced drying room, treat its expanded by heating after, then hot jacket on axle, treat like this its cooling after can be securely fixed on the axle.But when the client need safeguard maybe need change bearing the time in the future, disc, labyrinth ring are difficult for pulling down from axle, and cause disc easily, the distortion of labyrinth ring and can not reusing.

Simultaneously, motor shaft extension end and non-shaft stretching end do not possess versatility with the used wooden model of bearing end cover, and product cost is improved.

Because the existence of above problem, therefore the reputation to product has caused certain loss, produced some unnecessary maintenance costs, traveling expense and the waste in man-hour simultaneously, can influence the expansion of the totally-enclosed compact muscle external cooling high-voltage three-phase asynchronous motor of YFJ series future market and occupy.

Therefore, the project organization problem of how in time handling well with this electric drilling match bearing is very necessary, is the needs that ensure motor high-quality, low-cost safe operation, also is user for convenience, make things convenient for product processing, reduce the needs that product cost is consolidated and expanded market.

The utility model content

The purpose of the present utility model: be intended to propose a kind of easy installation and removal, can also effectively avoid foreign matter to enter the interior novel bearing structure of bearing.

This follow-on YFJ series muscle external cooling asynchronous motor bearing, form by cylindrical roller bearing 6, internal bearing cover 1, bearing holder (housing, cover) 2, bearing end cover 3 labyrinth rings 4 and disc 5, it is characterized in that: adopt between described disc 5 and labyrinth ring 4 and the axle and slip into matched in clearance, and both interior circular diameters of disc 5 and labyrinth ring 4 are identical, simultaneously labyrinth ring 4 directly is provided with by key 9 location by disc 5 and forms synchronous interlock, and labyrinth ring 4 is located by bearing end cover 3 holdings.

Described bearing end cover 3 is provided with a seam 8, is settling on this seam 8 can cover from the seam edge to the annulus 7 in internal circle portion interval.

According to this follow-on YFJ series muscle external cooling asynchronous motor bearing that above technical scheme proposes,, on bearing end cover, set up an annulus simultaneously again owing to the respective outer side edges of taking between novel disc, labyrinth ring and the axle; Therefore can overcome some defectives that existing YFJ series muscle external cooling asynchronous motor bearing exists ideally.Can prevent effectively that foreign matter from entering bearing cavity, also find feasible technical support simultaneously for the general annulus that is disposed on the different bearing end covers of IP54 with the IP55 motor.

Description of drawings

Fig. 1 is existing YFJ series muscle external cooling asynchronous motor bearing structural representation;

Fig. 2 is a structural representation of the present utility model;

Fig. 3 is for having installed annulus structural representation of the present utility model additional;

Fig. 4 is the existing YFJ series muscle external cooling asynchronous motor bearing structural representation that installs annulus additional.

Among the figure: 1-internal bearing cover 2-bearing holder (housing, cover) 3-enclosing cover 4-labyrinth ring 5-disc 6-cylindrical roller bearing 7-annulus 8-seam 9-key

Embodiment

This follow-on YFJ series muscle external cooling asynchronous motor bearing shown in Fig. 2-4, it is that this improvement mainly shows two places to a kind of inventive improvements of existing YFJ series muscle external cooling asynchronous motor bearing structure:

One, be to slip into matched in clearance with adopting between disc 5 and labyrinth ring 4 and the axle, and both interior circular diameters of disc 5 and labyrinth ring 4 are identical, simultaneously labyrinth ring 4 directly are provided with between the two with key 9 location and drive disc and labyrinth ring rotation and located by bearing end cover 3 holdings by disc 5.

Its two, on bearing end cover 3, be provided with a seam 8, settling on this seam 8 can cover from the seam edge to the annulus 7 in internal circle portion interval.

The used bearing of YFJ rib exterior cooling electric motor shaft extension end that with the height of center is 400mm below is an example, introduces this YFJ series muscle external cooling asynchronous motor bearing in detail.

In order to improve the shortcoming that existing used disc of bearing and labyrinth ring exist, in conjunction with the experience in the actual production, we have done improvement to the structure of the bearing end cover in the bearing, disc, labyrinth ring and the fit system between the axle, adopt and slip into matched in clearance.As shown in Figure 2, the interior round size of labyrinth ring and disc is , fit dimension is on the axle

, in disc, labyrinth ring minimum, justify being of a size of φ 130.00, and the last maximum excircle dimension of axle being φ 129.957, the two minimum has the gap of 0.063mm.When the imperial palace circle of disc, labyrinth ring is of a size of φ 130.04, and axle is when going up a minimum excircle dimension and being φ 129.917, and the two maximal clearance is 0.123mm.Because the processor generally gets middle tolerance, so the gap is about 0.09mm.Obviously, disc and labyrinth ring can be placed on the axle easily, locate and drive disc, labyrinth ring rotation between the two with key.Need pull down also very convenient.And the bearing disc of this structure, labyrinth ring need not advance the drying room heating, so can save into this electricity consumption of overlapping operation and having saved drying room of drying room.

After adopting the technical program, the bearing arrangement after former bearing arrangement and the improvement all can reach IP54, if make the degree of protection of motor reach IP55, then as shown in Figure 3, Figure 4, only need overlap an annulus 8 on bearing end cover just can satisfy the degree of protection requirement.

Can find out that by Fig. 3 and Fig. 4 for former bearing, the motor of IP54, IP55 needs different bearing end covers, promptly needs to mate different wooden models and casts, so both be unfavorable for producing, be not easy to keeping again.In order to make wooden model have versatility, reduce the expense of new die sinking tool, being convenient to the workshop deposits and produces for tissue and offer convenience, we improve the structure of bearing end cover, make IP54 and IP55 bearing end cover can adopt same wooden model to cast, just on the processing mode of foundry goods, distinguish to some extent.As shown in Figure 3, annulus is inserted at our bearing end cover φ 210 seams 8 places after processing, can make motor shaft extension end degree of protection reach IP55.

During the design bearing end cover, we have considered bigger versatility, the non-shaft stretching end band is tested the speed and be not that all available same wooden model of the used bearing end cover of IP54 or IP55 motor is cast, because they are different on the processing mode with the used bearing end cover that tests the speed, degree of protection.With different wooden models very big improvement has been arranged compared with original need, and the expense of having saved new die sinking tool, the utilance of wooden model and production efficiency are significantly improved.

By above improvement, for enterprise has brought economic benefit, drying room this cover operation and drying room electricity consumption have not only been saved, and for all available same wooden model casting of the used bearing end cover of the standard electromotor of same height of center, bring great convenience to production, safeguard that to improving the quality of products, make things convenient for the user bearing has also played reliable assurance.

We have at first improved that motor center is high to be 450mm, 500mm, the used bearing of 560mm, and the bearing after will improving has been used for the asynchronous motor of the YBFJ450-6470kW of Wuyang Iron ﹠ Steel Co., Ltd., YBFJ500-6650kW, three specifications of YBFJ-560-6750kW.Existing motor is delivered for use, and has obtained user's favorable comment.We will be used for all YFJ series muscle external cooling asynchronous machines to the improved achievement of current bearing.

Claims

1. follow-on YFJ series muscle external cooling asynchronous motor bearing, form by cylindrical roller bearing (6), internal bearing cover (1), bearing holder (housing, cover) (2), bearing end cover (3), labyrinth ring (4) and disc (5), it is characterized in that: adopt between described disc (5) and labyrinth ring (4) and the axle and slip into matched in clearance, and disc (5) is identical with both interior circular diameters of labyrinth ring (4), simultaneously labyrinth ring (4) directly is provided with by key (9) location by disc (5) to form interlock and located by bearing end cover (3) holding.

2. a kind of follow-on YFJ series muscle external cooling asynchronous motor bearing as claimed in claim 1, it is characterized in that: described bearing end cover (3) is provided with a seam (8), is settling the annulus (7) that can cover from the seam edge to internal circle portion interval on this seam (8).