CN218177459U

CN218177459U - Fixed shaft structure with good sealing performance for vacuum pump

Info

Publication number: CN218177459U
Application number: CN202222146590.1U
Authority: CN
Inventors: 杨志忠; 陆建堤
Original assignee: Wuhan Weilong Pump Industry Co ltd
Current assignee: Wuhan Weilong Pump Industry Co ltd
Priority date: 2022-08-16
Filing date: 2022-08-16
Publication date: 2022-12-30
Anticipated expiration: 2032-08-16

Abstract

The utility model relates to a vacuum pump technical field specifically is a fixed axle structure for vacuum pump that leakproofness is good, including fixed axle, bearing seal cover, three-layer seal structure and four-layer seal structure, the bearing seal cover parcel the fixed axle, three-layer seal structure includes the IDU oil blanket, IDU oil blanket fixed mounting is close to the inside one side of vacuum pump in the bearing seal cover, the IDU oil blanket includes the movable part, the fixed axle of laminating of movable part when the vacuum pump starts, four-layer seal structure includes the slider, the slider is cyclic annular parcel fixed axle, one side that the slider is close to three-layer seal structure is the acute angle. Set up the multilayer and seal, make sealed effect better, prevent the condition of the oil leak that leaks, and can still normally use when the one deck is sealed to become invalid, can not lose pressure suddenly, guarantee the quality of vacuum pump, make fixed axle department can not leak the pressure, guarantee the ideal effect of whole evacuation.

Description

Fixed shaft structure with good sealing performance for vacuum pump

Technical Field

The utility model relates to a vacuum pump technical field specifically is a fixed axle structure for vacuum pump that leakproofness is good.

Background

The kind of vacuum pump is various, divide according to the mounting means and can divide into vertical vacuum pump and horizontal vacuum pump, divide according to the transport mode and can divide into oily formula vacuum pump, water formula vacuum pump and no oily vacuum pump, no matter which kind of vacuum pump, the action of evacuation is accomplished in the rotation that all needs to realize piston or other parts through the rotation axis, the sealed effect of the fixed mode of present common axle is relatively poor, the easy problem such as oil leak appears leaking/oil leak, the effect that causes whole evacuation is not ideal enough, can also influence the quality of vacuum pump when serious.

SUMMERY OF THE UTILITY MODEL

For solving prior art's is not enough, the utility model provides a fixed axle construction for vacuum pump that leakproofness is good, including fixed axle, bearing seal cover, three-layer seal structure and four-layer seal structure, the bearing seal cover parcel the fixed axle, three-layer seal structure includes the IDU oil blanket, IDU oil blanket fixed mounting is close to one side of vacuum pump inside in the axle sleeve cover, the IDU oil blanket includes the movable part, the fixed axle of laminating of movable part when the vacuum pump starts, four-layer seal structure includes the slider, the slider is cyclic annular parcel fixed axle, one side that the slider is close to three-layer seal structure is the acute angle.

Preferably, the shaft sleeve further comprises a layer of sealing structure, the layer of sealing structure comprises a T-shaped groove and a T-shaped block, the T-shaped groove is formed in the inner wall of the shaft sleeve, and the T-shaped block is fixedly connected to the outer side wall of the fixed shaft and located in the T-shaped groove.

Preferably, still include two layers of seal structure, two layers of seal structure include arc wall and sealing ring, the arc wall is seted up on the inner wall of axle envelope, the diameter phase-match of diameter and the arc wall of sealing ring and fixed mounting are inside the arc wall.

Preferably, four layers of sealing structure include bar hole, movable block, slide bar, slider, the bar hole is seted up in the axle envelope inner wall, the movable block is located the bar downthehole portion, the spout has been seted up on the movable block, slide bar fixed mounting is on the inner wall in bar hole and inside one end extends to the spout, movable block one side fixed mounting has the slider.

Preferably, one side of the sliding block close to the three-layer sealing structure is an acute angle, and the diameter of a circle formed by the vertex of the acute angle is matched with that of the fixed shaft.

The utility model discloses have following beneficial effect:

set up the multilayer and seal, make sealed effect better, prevent the condition of the oil leak that leaks, and can still normally use when the one deck is sealed to become invalid, can not lose pressure suddenly, guarantee the quality of vacuum pump, make fixed axle department can not leak the pressure, guarantee the ideal effect of whole evacuation.

Drawings

Fig. 1 is a schematic view of the overall structure provided by the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1 according to the present invention.

In FIGS. 1-2, the list of structures represented by each reference numeral is as follows:

1. a fixed shaft; 2. a shaft envelope; 3. a layer of sealing structure; 31. a T-shaped slot; 32. a T-shaped block; 4. a two-layer sealing structure; 41. an arc-shaped slot; 42. a seal ring; 5. a three-layer sealing structure; 51. IDU oil seal; 52. a movable portion; 6. a four-layer seal structure; 61. a strip-shaped hole; 62. a movable block; 63. a chute; 64. a slide bar; 65. a slide block.

Detailed Description

The following description is made for the purpose of illustrating the principles and features of the present invention, and is not intended to limit the scope of the invention.

It will be understood that when an element or component is referred to as being "connected," "positioned" or "coupled" to another element or component, it can be directly on the other element or component or intervening elements or components may also be present. The terms "left", "right", "upper", "lower" and the like as used herein are for illustrative purposes only.

In one embodiment, as shown in fig. 1-2, a fixed shaft structure for a vacuum pump with good sealing performance comprises a fixed shaft 1, a shaft envelope 2, a three-layer sealing structure 5 and a four-layer sealing structure 6, wherein the shaft envelope 2 wraps the fixed shaft 1;

the three-layer sealing structure 5 comprises an IDU oil seal 51, the IDU oil seal 51 is fixedly arranged on one side of the shaft envelope 2 close to the interior of the vacuum pump, the IDU oil seal 51 comprises a movable part 52, and the movable part 52 is attached to the fixed shaft 1 when the vacuum pump is started;

the four-layer sealing structure 6 comprises a sliding block 65, the sliding block 65 is annularly wrapped on the fixing shaft 1, and one side, close to the three-layer sealing structure 5, of the sliding block 65 is an acute angle.

In this embodiment, a holding tank has been seted up to one side that the axle sleeve 2 is close to the vacuum pump inside, three-layer seal structure 5 is located the holding tank, IDU oil blanket 51 is the U-shaped, and the opening of U-shaped is towards four layers of seal structure 6, and the vacuum pump is when starting, and the inside atmospheric pressure of vacuum pump is less than outside atmospheric pressure, movable part 52 adsorbs the laminating at the lateral wall of fixed axle 1 through the atmospheric pressure difference and seals, and the atmospheric pressure difference is big then adsorbs tighter then sealed effect is better. The IDU oil seal 51 is a polyurethane oil seal.

In this embodiment, four-layer seal structure 6 includes bar hole 61, movable block 62, spout 63, slide bar 64, slider 65, bar hole 61 is seted up in 2 inner walls of axle envelope cover, movable block 62 is located bar hole 61 inside, set up spout 63 that is at least one on the movable block 62, slide bar 64 fixed mounting on the inner wall of bar hole 61 and with spout 63 one-to-one, slide bar 64 one end extends to inside spout 63, spout 63 makes for the bar slide bar 64 and movable block 62 can take place relative movement, one side fixed mounting that movable block 62 is close to three-layer seal structure 5 has slider 65, slider 65's cross section is triangle-shaped, the diameter that one side that slider 65 is close to three-layer seal structure 5 is the circle of acute angle and acute angle summit constitution matches with the diameter of fixed axle 1. When the three-layer sealing structure 5 fails or has a poor sealing effect, negative pressure is transmitted into the strip-shaped hole 61, so that the sliding block 65 moves towards the inside of the vacuum pump under the action of the negative pressure, and the tip of the sliding block 65 is inserted into a gap between the shaft seal sleeve 2 and the fixed shaft 1 to seal the gap between the shaft seal sleeve 2 and the fixed shaft 1.

Can do further optimization or/and improvement to the fixed axle structure for the vacuum pump that above-mentioned leakproofness is good according to actual need:

still include one deck seal structure 3, one deck seal structure 3 includes T-arrangement groove 31 and T-arrangement piece 32, the 2 inner walls in axle seal cover are seted up to T-arrangement groove 31, T-arrangement piece 32 fixed connection is in fixed axle 1 lateral wall and be located T-arrangement groove 31 inside, T-arrangement groove 31 is located one side that three-layer seal structure 5 was kept away from to four layers of seal structure 6, T-arrangement piece 32 and T-arrangement groove 31 phase-match can block the outside impurity of vacuum pump.

Still include two layers of seal structure 4, two layers of seal structure 4 are located between one deck seal structure 3 and the four-layer seal structure 6, two layers of seal structure 4 include arc wall 41 and sealing ring 42, arc wall 41 is seted up on the inner wall of axle envelope 2, the diameter phase-match of sealing ring 42 and arc wall 41 and fixed mounting are inside arc wall 41, sealing ring 42 contacts with fixed axle 1 and is extruded by fixed axle 1 and takes place deformation. The contact area of the sealing ring 42 and the fixed shaft 1 is increased, so that the sealing effect is better.

Specifically, the first-layer sealing structure 3, the second-layer sealing structure 4, the third-layer sealing structure 5 and the fourth-layer sealing structure 6 are all annularly wrapped on the fixing shaft 1.

In summary, the following steps: set up the multilayer and seal, make sealed effect better, prevent the condition of the oil leak that leaks, and can still normally use when the one deck is sealed to be inefficacy, can not lose pressure suddenly, guarantee the quality of vacuum pump, make fixed axle 1 department can not leak pressure, guarantee the ideal effect of whole evacuation.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way; the utility model can be smoothly implemented by the ordinary technicians in the industry according to the drawings and the above description; however, those skilled in the art should understand that the equivalent embodiments of the present invention are equivalent embodiments of the present invention, and that the changes, modifications and evolutions made by the above-disclosed technical contents are not departed from the technical scope of the present invention; meanwhile, any changes, modifications, evolutions, etc. of the above embodiments, which are equivalent to the actual techniques of the present invention, still belong to the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a fixed axle construction for vacuum pump that leakproofness is good which characterized in that: the sealing device comprises a fixed shaft (1), a shaft seal sleeve (2), a three-layer sealing structure (5) and a four-layer sealing structure (6), wherein the shaft seal sleeve (2) wraps the fixed shaft (1);

the three-layer sealing structure (5) comprises an IDU oil seal (51), the IDU oil seal (51) is fixedly arranged on one side, close to the interior of the vacuum pump, of the shaft sealing sleeve (2), the IDU oil seal (51) comprises a movable part (52), and the movable part (52) is attached to the fixed shaft (1) when the vacuum pump is started;

the four-layer sealing structure (6) comprises a sliding block (65), the sliding block (65) is annularly wrapped on the fixed shaft (1), and one side, close to the three-layer sealing structure (5), of the sliding block (65) is an acute angle.

2. The fixed shaft structure for the vacuum pump in accordance with claim 1, wherein: still include one deck seal structure (3), one deck seal structure (3) are including T-slot (31) and T-shaped piece (32), the axle envelope cover (2) inner wall is seted up in T-slot (31), T-shaped piece (32) fixed connection is in fixed axle (1) lateral wall and be located inside T-slot (31).

3. The fixed shaft structure for the vacuum pump of claim 1, wherein: still include two layers of seal structure (4), two layers of seal structure (4) include arc wall (41) and sealing ring (42), arc wall (41) are seted up on the inner wall of axle big envelope (2), the diameter phase-match of diameter and arc wall (41) of sealing ring (42) and fixed mounting are inside arc wall (41).

4. The fixed shaft structure for the vacuum pump of claim 1, wherein: four-layer sealing structure (6) are including bar hole (61), movable block (62), slide bar (64), slider (65), bar hole (61) are seted up in axle envelope (2) inner wall, movable block (62) are located bar hole (61) inside, spout (63) have been seted up on movable block (62), slide bar (64) fixed mounting is on the inner wall in bar hole (61) and one end extends to inside spout (63), movable block (62) one side fixed mounting has slider (65).

5. The fixed shaft structure for the vacuum pump of claim 1, wherein: one side of the sliding block (65) close to the three-layer sealing structure (5) is an acute angle, and the diameter of a circle formed by the vertex of the acute angle is matched with that of the fixed shaft (1).