CN214274031U

CN214274031U - Centrifugal compressor with gear increasing speed

Info

Publication number: CN214274031U
Application number: CN202023095412.8U
Authority: CN
Inventors: 鲁寅; 李连福; 卞显琪
Original assignee: Shanghai Hanbell Precise Machinery Co ltd
Current assignee: Shanghai Hanbell Precise Machinery Co ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-09-24
Anticipated expiration: 2030-12-21

Abstract

The utility model provides a gear speed-up's centrifugal compressor, it includes the gear box, the bearing, rotation axis and oil seal, is equipped with the oil slinger between oil seal and the bearing, oil seal includes main oil blanket awl tooth and inferior oil blanket awl tooth, forms sealed cavity between the adjacent inferior oil blanket awl tooth, and main oil blanket awl tooth forms the oil extraction cavity with inferior oil blanket awl tooth and oil slinger, the opposite side and the oil slinger clearance fit of main oil blanket awl tooth and with the longitudinal extension portion of oil slinger forms first oil duct. The utility model discloses a gear speed increasing's centrifugal compressor is through increasing the oil slinger in the middle of bearing and oil blanket, and oil discharge cavity and oil return channel have played on the one hand and have kept off oil and hinder oily effect, and on the other hand can collect the lubricating oil that spills over and make it get back to inside the gear box to play and restrain lubricating oil or oil mist and outwards leak, it carries out inside the gear box to have blockked impurity such as outside dust.

Description

Centrifugal compressor with gear increasing speed

Technical Field

The utility model relates to a compressor, in particular to centrifugal compressor of gear acceleration rate.

Background

When the tooth-type speed-increasing centrifugal compressor operates, a gear and a bearing need lubricating oil for lubricating and cooling, how to prevent the lubricating oil from leaking outwards in the process is a key technology, most of the existing sealing structures adopt split sealing or skeleton sealing, but the sealing belongs to contact sealing, on one hand, the oil easily leaks outwards due to abrasion in long-time operation, on the other hand, the rotating shaft is also abraded, and the cost and the time for subsequent compressor maintenance are increased.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a centrifugal compressor of gear acceleration rate in order to cause among the overcome prior art easily that lubricating oil leaks and the too high defect of cost.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

a centrifugal compressor with a gear increasing speed comprises a gear box body, a bearing and a rotating shaft arranged in the bearing, wherein an oil seal device is arranged on the rotating shaft;

the oil seal device comprises a main oil seal conical tooth abutted against the oil slinger and at least two secondary oil seal conical teeth, and a seal cavity is formed between the rotating shaft and the adjacent secondary oil seal conical teeth; the free end of the main oil seal conical tooth is abutted against the transverse extension part of the oil slinger, an oil discharge cavity is formed by the main oil seal conical tooth, the secondary oil seal conical tooth adjacent to the main oil seal conical tooth and the transverse extension part of the oil slinger, and the other side of the main oil seal conical tooth is in clearance fit with the oil slinger and forms a first oil sealing channel with the longitudinal extension part of the oil slinger.

Preferably, the tooth length of the primary oil seal bevel tooth is smaller than that of the secondary oil seal bevel tooth.

Preferably, the oil seal device further comprises an oil return passage communicated with the gearbox body, and the oil return passage is communicated with the oil discharge chamber.

Preferably, the range of the clearance of the first oil sealing passage along the radial direction of the rotating shaft is 0.1mm-0.3 mm.

Preferably, the clearance between the outer diameter of the longitudinal extension of the oil slinger and the gearbox box is 0.1mm-0.3 mm.

Preferably, the width of the oil discharge chamber in the axial direction is larger than the width of the seal chamber in the axial direction.

In the present invention, the above-mentioned preferred conditions can be combined at will on the basis of general knowledge in the field, so as to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: the utility model discloses a gear speed increasing's centrifugal compressor is through increasing the oil slinger in the middle of bearing and oil blanket, oil discharge cavity and return channel, played the fender oil on the one hand and hindered oily effect, on the other hand can collect the lubricating oil that spills over, let it get back to inside the gear box from return channel, when the high-speed rotation of rotation axis, form certain pressure at its seal chamber, because the inside negative pressure state that is in always of gear box, also play like this and restrain lubricating oil or oil mist and outwards leak, and it carries out inside the gear box to have blockked impurity such as outside dust.

Drawings

Fig. 1 is a schematic view of a structure of a part of a centrifugal compressor with a gear speed increasing according to a preferred embodiment of the present invention.

Fig. 2 is an enlarged view of the connection relationship between the bearing, the oil seal and the oil slinger in fig. 1.

Detailed Description

The present invention will be more clearly and completely described below with reference to the accompanying drawings.

The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, and any modification of the structure, change of the ratio relationship or adjustment of the size should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the efficacy that the present invention can produce and the purpose that can be achieved. Meanwhile, the terms "a", "an", "two" and "upper" are used in the specification for convenience of description only and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes and should be regarded as the scope of the present invention.

As shown in fig. 1 and 2, the gear-accelerated centrifugal compressor in the present embodiment includes a gear housing 1, a bearing 2, and a rotary shaft 5 provided in the bearing 2. An oil seal device 4 is arranged on the rotating shaft 5, and an oil slinger 3 is arranged between the oil seal device 4 and the bearing 5. As shown in fig. 2, the oil slinger 3 in this embodiment is L-shaped in longitudinal section and includes a longitudinal extension 31 and a lateral extension 32. The oil slinger 3 is sleeved on the rotating shaft 5, and in order to prevent the oil slinger 3 from moving or jumping in work, the inner wall of the transverse extension portion 32 (namely the inner diameter of the oil slinger) is in interference fit with the rotating shaft 5. While the free end of the longitudinal extension 31 (i.e. the outer diameter of the oil slinger) is a clearance fit with the inner wall of the gearbox housing 1, in this embodiment the clearance is 0.2mm, although in other embodiments it may be selected from the range of 0.1-0.3 mm.

The oil seal 4 includes a primary oil seal bevel 41, and four secondary oil seal bevel, wherein the primary oil seal bevel has a shorter tooth length than the secondary oil seal bevel. The free ends of the four secondary oil seal conical teeth abut against the surface of the rotating shaft 5, and three annular seal chambers 43 are respectively formed between the rotating shaft 5 and the adjacent secondary oil seal conical teeth. The free end of the main oil seal conical tooth 41 abuts against the transverse extension of the oil slinger 3, and an oil discharge chamber 42 is formed by the main oil seal conical tooth 41, a secondary oil seal conical tooth adjacent to the main oil seal conical tooth 41 and the transverse extension of the oil slinger 3. The other side of the main oil seal conical tooth 41 is in clearance fit with the longitudinal extension part 31 of the oil slinger 3 and forms a first oil seal channel 33 together with the longitudinal extension part 31. The first oil seal passage 33 has a gap (i.e., a height direction in the drawing) in a range of 0.1mm to 0.3mm extending in the radial direction of the rotating shaft 5, and the first oil seal passage gap is preferably 0.2mm in the present embodiment.

In addition, the oil seal device 4 further comprises an oil return passage 44 communicated with the gearbox housing 1, and the oil return passage 44 is communicated with the oil discharge chamber 42. The oil return passage 44 is used to collect the overflowed lubricating oil and return it to the interior of the gearbox housing 1. When the rotating shaft 5 rotates at a high speed, a certain pressure is formed in the sealed cavity 43, and the inside of the gearbox body 1 is always in a negative pressure state, so that the lubricating oil or oil mist can be inhibited from leaking outwards, external impurities can be prevented from entering the inside of the gearbox, the lubricating oil is kept from being polluted, and the normal operation of a unit is ensured. The clearance between the outer diameter of the longitudinal extension 31 of the oil slinger 3 and the inner wall of the gearbox housing is 0.1mm-0.3mm, preferably 0.2mm in the embodiment.

Preferably, the width of the oil discharge chamber 42 in the axial direction is greater than the width of the seal chamber 43 in the axial direction, so that the collection and diversion of the lubricating oil can be performed more effectively.

The above-described embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Any person skilled in the art can modify the above-described embodiments without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present patent shall be listed in the following claims.

Claims

1. A centrifugal compressor with a gear increasing speed comprises a gear box body, a bearing and a rotating shaft arranged in the bearing, wherein an oil seal device is arranged on the rotating shaft;

2. The gear enhanced centrifugal compressor of claim 1, wherein said primary oil-sealed bevel teeth have a tooth length less than a tooth length of said secondary oil-sealed bevel teeth.

3. The gear enhanced centrifugal compressor of claim 2, wherein said oil seal arrangement further comprises an oil return passage in communication with said gearbox housing, said oil return passage in communication with said oil discharge chamber.

4. The gear-accelerated centrifugal compressor according to claim 3, wherein the clearance of the first oil seal passage in the radial direction of the rotating shaft ranges from 0.1mm to 0.3 mm.

5. The gear enhanced centrifugal compressor of claim 4, wherein the clearance between the outer diameter of the longitudinal extension of said oil slinger and said gear case is in the range of 0.1mm to 0.3 mm.

6. The gear enhanced centrifugal compressor of claim 5, wherein said oil drainage chamber has an axial width greater than an axial width of said seal chamber.