CN213270280U

CN213270280U - Sealing assembly for shaft

Info

Publication number: CN213270280U
Application number: CN202022200588.9U
Authority: CN
Inventors: 毛羽虎; 姚勇; 邓江涛
Original assignee: Jiangsu Aichuan Machinery Co ltd
Current assignee: Jiangsu Aichuan Machinery Co ltd
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2021-05-25
Anticipated expiration: 2030-09-29

Abstract

The utility model provides a shaft seal assembly, includes seal bush, floating ring, wave spring, the seal bush inner wall be provided with the ring channel of the rectangle that the cross-section is one end open-ended, specific ring channel has two, is first ring channel, second ring channel respectively, first ring channel and second ring channel in be provided with two floating rings and a wave spring respectively, wave spring set up between two floating rings, wave spring support the medial surface of two floating rings, two floating ring outside terminal surfaces closely laminate with the inside wall of ring channel respectively. The utility model discloses, the sealed equipment that separates into two regions or spaces on same root axiality of shaft seal assembly mainly used is used, especially is used for oil-free screw compressor or fan, and sealed between gas compression space and gear drive case can effectually prevent that gear, the lubricated lubricating oil of bearing from getting into the gas compression space, lets the gas compression space be in an oilless state all the time.

Description

Sealing assembly for shaft

Technical Field

The utility model relates to a machinery especially relates to a sealing assembly for axle for gyration type equipment with sealed technical field.

Background

Oil lubrication is required for various rotary equipment such as compressors, fans, vacuum pumps, reduction boxes, machine tools and other running parts, and particularly, equipment running at high speed is required. Generally, lubricating oil forms circulating oil or oil mist through an oil pump, or is mixed with compressed air to form oil gas which enters a lubricating point to lubricate high-speed running parts such as bearings, gears and other friction pairs, and the heat is taken away, so that the parts can run reliably for a long time. The rotor part and the gear part of the oil-free screw compressor run on the same shaft, the space where the rotor part is located needs to be an oil-free environment, but the gear part and a bearing supporting the whole shaft need to be lubricated by oil, and therefore the oil needs to be isolated at the bearing supporting part so as to prevent the oil from entering the rotor space and polluting the conveyed gas. Under the special condition, if the poisonous and harmful gas of carrying, leak at the bearing installation position and still can not directly discharge to the air, need retrieve to it and recycle, consequently still need be provided with the recycle passageway to seal assembly.

SUMMERY OF THE UTILITY MODEL

To the above problem, the utility model aims at providing an epaxial seal assembly for gyration type equipment, the compression of specially adapted or carry do not have the oil screw compressor of oil medium, do not have gyration type machinery such as oil screw fan to use, keep apart through throttle ring and oil slinging ring to having the oil end, keep apart the gas end through multiple floating ring, realize the effect of dual seal.

The utility model adopts the technical proposal that: the utility model provides a shaft seal assembly, includes seal bush, floating ring, wave spring, its characterized in that: the sealing bush inner wall be provided with the ring channel of the rectangle that the cross-section is one end open-ended, specific ring channel has two, is first ring channel, second ring channel respectively, first ring channel and second ring channel in be provided with two floating rings and a wave spring respectively, wave spring set up between two floating rings, wave spring support the medial surface of two floating rings, two floating ring outside terminal surfaces closely laminate with the inside wall of ring channel respectively.

Preferably, the first annular groove is provided with a first annular mounting hole and a first annular exhaust hole.

Preferably, the second annular groove is provided with a second annular mounting hole and a second annular exhaust hole.

Preferably, the annular angle of the first annular mounting hole and the second annular mounting hole is larger than 180 degrees.

Preferably, the inner wall of the sealing bush is also provided with a throttling ring.

Preferably, the throttle ring is provided with a bevel.

Preferably, the inner wall of the sealing bush is provided with an oil slinger.

Preferably, the oil slinger is of a rectangular thread structure.

Preferably, the left side and the right side of the throttle ring are also provided with a third annular groove and a fourth annular groove.

As a preferable scheme, a third oil return hole is formed in the bottom of the third annular groove, and a fourth oil return hole is formed in the bottom of the fourth annular groove.

The utility model discloses, the sealed equipment that separates into two regions or spaces on same root axiality of shaft seal assembly mainly used is used, especially is used for oil-free screw compressor or fan, and sealed between gas compression space and gear drive case can effectually prevent that gear, the lubricated lubricating oil of bearing from getting into the gas compression space, lets the gas compression space be in an oilless state all the time.

Drawings

FIG. 1 is a full cross-sectional view of a shaft seal assembly of the present invention;

FIG. 2 is a front view of the seal bushing of the present invention;

FIG. 3 is a full sectional view of FIG. 2;

fig. 4 is a full sectional view of the embodiment of the present invention.

In the figure: 1 sealing bush, 2 floating ring, 3 wave spring, 4 first bearing, 5 bearing seat, 6 second bearing.

Detailed Description

Further explanation is made through the attached drawings, as shown in fig. 1 to 4, a schematic diagram of a shaft seal assembly includes a seal bush 1, floating rings 2, and wave springs 3, wherein the inner wall of the seal bush 1 is provided with two rectangular ring grooves with an open end in cross section, the specific ring grooves are a first ring groove 11 and a second ring groove 12, the first ring groove 11 and the second ring groove 12 are respectively provided with two floating rings 2 and one wave spring 3, the wave spring 3 is arranged between the two floating rings 2, the wave spring 3 supports against the inner side end faces of the two floating rings 2, and the outer side end faces of the two floating rings 2 are respectively tightly attached to the inner side wall of the ring groove.

The first annular groove 11 is provided with a first annular mounting hole 111 and a first annular exhaust hole 112, the second annular groove 12 is provided with a second annular mounting hole 121 and a second annular exhaust hole 122, the annular angle of the first annular mounting hole 111 and the second annular mounting hole 121 is larger than 180 degrees, the first annular mounting hole 111 and the second annular mounting hole 121 are used for mounting the floating ring 2 and the wave spring 3 into the first annular groove 11 and the second annular groove 12, the two floating rings 2 are firstly placed into the first annular groove 11, the wave spring 3 is clamped between the two floating rings 2, the mounting is completed, and the floating ring 2 and the wave spring 3 in the second annular groove 12 are mounted by repeating the actions.

Specifically, the inner wall of the seal bushing 1 is further provided with a throttle ring 13, the throttle ring 13 is provided with an inclined surface 131, the inclined surface 131 of the throttle ring 13 can play a role in guiding lubricating oil, and leaked lubricating oil can flow into the fourth oil return hole 161 more smoothly and finally flow back to the oil tank.

Specifically, the left side and the right side of the throttle ring 13 are further provided with a third annular groove 15 and a fourth annular groove 16, the bottom of the third annular groove 15 is provided with a third oil return hole 151, and the bottom of the fourth annular groove 16 is provided with a fourth oil return hole 161.

The utility model discloses a sealing component for axle is in concrete use, generally can cooperate bearing sealing component to use together and form and support sealing system, the sealing component for axle left side has set gradually first bearing 4, bearing frame 5, second bearing 6 is installed in bearing frame 5, seal bush 1, first bearing 4, bearing frame 5 is installed on equipment, the center pin runs through whole support sealing system from a left side to the right side, wherein first bearing 4 and second bearing 6 mainly play the effect of support center axle, lubricating oil flows into first bearing 4 and second bearing 6 position from oil duct 51 on bearing frame 5 and lubricates the bearing, get back to the oil tank from lower part oil return opening 52 at last, it flows back to in third oil gallery 151 from first bearing 4 right side position to have a small part of oil, simultaneously, also can have the residue of oil on the center axle, through the first way oil blocking effect of throttle ring 13, the throttling ring 13 is in clearance fit with the central shaft to prevent most of the residual lubricating oil from continuously leaking to the right side, finally, the oil slinger 14 is arranged on the inner wall of the sealing bush 1 and in clearance fit with the central shaft, the oil slinger 14 is of a rectangular thread structure, the rotating direction of the rectangular thread is consistent with the rotating direction of the central shaft penetrating through the whole sealing assembly, and the lubricating oil thrown out of the oil slinger 14 flows back to the oil tank through the fourth oil return hole 161.

The right side of the sealing bush 1 is a medium gas compression space, and one side close to the sealing bush 1 is a high-pressure area, so that medium gas leaked through a gap between the central shaft and the floating ring 2 is positive pressure, and the gap between the inner ring of the floating ring 2 and the central shaft is generally 0.1-0.15mm, so that the right side of the oil slinger 14 is kept to be positive pressure, when the oil slinger 14 works, lubricating oil cannot leak to the installation area of the floating ring 2, the medium gas compression space is ensured to be in an oil-free state, if the leaked medium gas is air, the leaked medium gas can be exhausted to the atmosphere through the second annular exhaust hole 122 and escaping oil mist, and when the medium gas is toxic and harmful gas, the leaked medium gas flows back to the inlet of the compressor through the first; meanwhile, the medium is prevented from leaking out by the inflation seal of the second annular exhaust hole 122 and the access of external high-pressure gas, and meanwhile, the medium and the lubricating oil are completely isolated, so that harmful substances in the medium are prevented from entering the lubricating oil, and the lubricating oil is deteriorated to generate lubrication failure to cause equipment failure. In order to reduce the leakage of the filled gas from the oil slinger side, a floating ring is additionally arranged on the inner side of the oil slinger to reduce the gap between the floating ring and the shaft and reduce the flow passage area, thereby reducing the loss of sealing gas such as nitrogen.

The present invention is not limited by the above embodiments, and the embodiments and the description only describe the principle of the present invention, without departing from the spirit and scope of the present invention, the present invention can also have various changes and improvements, and these changes and improvements all fall into the scope of the claimed invention.

Claims

1. The utility model provides a shaft seal assembly, includes seal bush (1), floating ring (2), wave spring (3), its characterized in that: sealing bush (1) inner wall be provided with the cross-section for the annular groove of one end open-ended rectangle, specific annular groove has two, is first annular groove (11), second annular groove (12) respectively, first annular groove (11) and second annular groove (12) in be provided with two floating ring (2) and a wave spring (3) respectively, wave spring (3) set up between two floating ring (2), wave spring (3) support the medial surface of two floating ring (2), two floating ring (2) outside terminal surfaces closely laminate with the inside wall of annular groove respectively.

2. The shaft seal assembly of claim 1 wherein: the first annular groove (11) is provided with a first annular mounting hole (111) and a first annular exhaust hole (112).

3. The shaft seal assembly of claim 1 wherein: and a second annular mounting hole (121) and a second annular exhaust hole (122) are formed in the second annular groove (12).

4. The shaft seal assembly of claim 2, wherein: the annular angle of the first annular mounting hole (111) and the second annular mounting hole (121) is larger than 180 degrees.

5. The shaft seal assembly of claim 1 wherein: the inner wall of the sealing bush (1) is also provided with a throttling ring (13).

6. The shaft seal assembly of claim 5 wherein: the throttling ring (13) is provided with an inclined surface (131).

7. The shaft seal assembly of claim 1 wherein: and an oil slinger (14) is arranged on the inner wall of the sealing bush (1).

8. The shaft seal assembly of claim 7 wherein: the oil slinger (14) is of a rectangular thread structure.

9. The shaft seal assembly of claim 5 wherein: the left side and the right side of the throttling ring (13) are also provided with a third annular groove (15) and a fourth annular groove (16).

10. The shaft seal assembly of claim 9 wherein: and a third oil return hole (151) is formed in the bottom of the third annular groove (15), and a fourth oil return hole (161) is formed in the bottom of the fourth annular groove (16).