Mechanical liquid stopping block

Abstract

The utility model relates to a mechanical liquid stopping block which is arranged on a rotating component in a mechanical structure and is provided with an isolating piece for isolating a liquid seepage position of the rotating component from a liquid area. The separator is fixed on the rotating component and rotates synchronously with the rotating component. And the negative pressure adsorption chamber is positioned at the seepage position of the rotating component. The through holes are communicated with the negative pressure adsorption chamber and the liquid area and penetrate through the separator; the central axis of the through hole is not parallel to the rotating axis of the rotating component; the end located in the negative pressure adsorption chamber serves as the tail end of the through hole, the end located in the liquid area serves as the front end of the through hole, and the front end of the through hole does not incline in the rotating direction. The rotating component drives the mechanical liquid stopping block to rotate together at a high speed, lubricating oil at the liquid seepage position of the rotating component is sucked into the through hole through negative pressure and thrown into a liquid area, and therefore the lubricating oil is prevented from seeping out of the shell along the rotating component.

Description

[0001] This application is a divisional application. Original patent application date: April 10, 2023; Patent application number: 2023207742878; Invention title: Mechanical seal liquid retaining block and mechanical structure. Technical Field

[0002] The utility model relates to a mechanical structure, in particular to a mechanical liquid-blocking block. Background Art

[0003] Mechanical structures often consist of a housing and a rotating shaft. Typically, the rotating shaft extends out of the housing. The housing contains moving parts, and to lubricate and cool these moving parts, a coolant, lubricant, or oil (hereinafter referred to as lubricant) needs to be injected into the housing.

[0004] The lubricating oil easily leaks out of the housing from the fitting portion between the rotating shaft and the housing (the fitting portion is also referred to as the rotating component leakage portion in the present invention). Utility Model Content

[0005] In order to solve the above technical problems, the present invention provides a mechanical liquid blocking block.

[0006] The mechanical liquid blocking block of the first aspect of the present invention is provided on a rotating component in a mechanical structure and has:

[0007] An isolating member is used to isolate the liquid leakage area of the rotating component from the liquid area; the isolating member is fixed to the rotating component and rotates synchronously with the rotating component.

[0008] A negative pressure adsorption chamber located at the point where liquid seeps from rotating parts.

[0009] A plurality of through holes are connected to the negative pressure adsorption chamber and the liquid area, and the through holes pass through the isolation piece; the central axis of the through hole is not parallel to the rotation axis of the rotating component; the end located in the negative pressure adsorption chamber is the tail end of the through hole, and the end located in the liquid area is the front end of the through hole, wherein the front end of the through hole is not inclined in the direction of rotation.

[0010] There are 2 to 12 through holes, which are evenly distributed on the rotating circumference of the isolation member.

[0011] Wherein, the isolation member is a boss arranged on the rotating component, and the wall of the boss isolates the liquid seepage area of the rotating component from the liquid area.

[0012] Wherein, the central axis of the through hole is one of an arc and a broken line; wherein, when the central axis of the through hole is one of an arc and a broken line:

[0013] The central axis of the through hole is not parallel to the rotation axis of the rotating component. Specifically, the central connecting line of the end faces of the front end and the rear end of the through hole forms an angle greater than 0° and less than 90° with the rotation axis of the rotating component.

[0014] The front end of the through hole is not inclined in the rotation direction, specifically, the center connecting straight line of the end surface of the front end and the rear end of the through hole is not inclined in the rotation direction.

[0015] Wherein, the central axis of the through hole is a straight line.

[0016] The central axis of the through hole is not parallel to the rotation axis of the rotating component, specifically one of the following:

[0017] (1) The central axis of the through hole is perpendicular to the rotation axis of the rotating component.

[0018] (2) The central axis of the through hole forms an angle with the rotation axis of the rotating component that is greater than 0° and less than 90°;

[0019] The front end of the through hole is not inclined in the rotation direction, specifically one of the following:

[0020] (1) The front end of the through hole is inclined toward the opposite side of the rotation direction;

[0021] (2) The through hole is perpendicular to the tangent of the rotation circle of the rotating component.

[0022] Wherein, the isolating member includes at least one mounting surface adapted to the rotating component, and the isolating member is fixed on the rotating component via the mounting surface.

[0023] The isolating member is a ring sleeved on the rotating component, the wall of the ring isolates the negative pressure adsorption chamber from the liquid area, and the through hole passes through the wall of the ring; the ring has a sealing ring adapted to the mechanical housing and forms an adapting surface of the negative pressure adsorption chamber with the sealing ring.

[0024] Wherein, the mounting surface is one of the following:

[0025] The inner surface of the inner hole of the ring is the mounting surface, and the ring is mounted on the rotating component through hole-shaft matching.

[0026] The side wall of the ring is a mounting surface, and the ring is mounted on the rotating component by fasteners.

[0027] Wherein, a flange is provided on the outer circumferential surface of the ring, and the flange is located between the end surface of the ring close to the negative pressure adsorption chamber and the front end of the through hole.

[0028] Wherein, the adapting surface is one of the following:

[0029] (1) The side wall of the ring;

[0030] (2) The inner hole of the ring is a stepped hole, wherein the inner circular surface of the small hole of the stepped hole is the mounting surface, and the inner circular surface of the large hole of the stepped hole is the adapting surface.

[0031] Among them, a negative pressure adsorption chamber is formed in the large hole; a liquid collecting tank is arranged between the small hole and the large hole of the step hole; and the through hole communicates with the liquid collecting tank and the outer wall of the ring.

[0032] Beneficial technical effects of the utility model:

[0033] When the rotating component drives the mechanical liquid blocking block to rotate at high speed, the splashing lubricating oil in the shell flows to the seepage of the rotating component and enters the negative pressure adsorption chamber. Since the mechanical liquid blocking block is rotating, the lubricating oil at the seepage of the rotating component will be thrown into the liquid collecting tank under the action of centrifugal force, and then thrown out from the through hole to the liquid area in the shell. At this time, the through hole on the mechanical liquid blocking block is equivalent to a centrifugal pump, forming a negative pressure area in the negative pressure adsorption chamber. Therefore, the liquid at the seepage 31 of the rotating component will be absorbed by the negative pressure adsorption chamber and then thrown out from the through hole to the liquid area to prevent leakage outside the casing. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the mechanical liquid blocking block installed in the mechanical structure;

[0035] Figure 2 Schematic diagram of the structure of the mechanical liquid blocking block;

[0036] Figure 3 It is a schematic diagram of the mechanical liquid blocking block structure consisting of two semicircles connected;

[0037] Figure 4 It is a structural diagram of the adapting surface and a structural diagram of the mounting surface;

[0038] Figure 5 is another structural schematic diagram of the adapting surface, and another structural schematic diagram of the mounting surface;

[0039] Figure 6 2 is a structural diagram of the through hole, showing that the through hole is a straight line structure and is arranged along a perpendicular line of the tangent line of the outer circle of the rotation axis;

[0040] Figure 7 It shows that the through hole is a straight line structure and lags behind the perpendicular line of the tangent line of the outer circle of the rotation axis;

[0041] Figure 8 Shows a through hole for the arc structure, and the perpendicular line lagging behind the tangent line of the outer circle of the rotation axis.

[0042] Figure 9 It is a schematic diagram of a mechanical structure with a mechanical liquid blocking block.

[0043] Among them, the separator 1; the rotating component 2; the negative pressure adsorption chamber 3; the liquid area 4; the shell 5; the flange 6; the sealing ring 7; the through hole 8; the adapting surface 9; the liquid collecting tank 10; the mounting surface 11; and the liquid seepage place 31 of the rotating component. DETAILED DESCRIPTION

[0044] Regarding the liquid area of the present invention: To lubricate or cool the operating components (gears or shafts), the machine is provided with a housing 5, into which the operating components are mounted. A lubricating or cooling liquid is then injected into the housing and sealed. The lubricating or cooling liquid can be water coolant or other coolants, but the most common is lubricating oil. The liquid area 4 of the present invention is the area where liquid collects and splashes. Lubricating oil easily seeps out of the housing from the mating point between the rotating shaft and the housing. This mating point is also referred to as the rotating component seepage area 31 in the present invention.

[0045] Example 1:

[0046] The mechanical liquid-blocking block of the present invention is arranged on a rotating component 2 in a mechanical structure, wherein the rotating component 2 can be a rotating shaft, a rotating pin, a shaft end, or a rotating disk in the mechanical structure.

[0047] refer to Figure 1 、 4 5. When the rotating component 2 is a rotating shaft or rotating pin, the mechanical liquid blocking block is attached to the rotating shaft and fixed. When the rotating component is a shaft end, the mechanical liquid blocking block is fixed to the shaft end, and the negative pressure adsorption chamber surrounds the shaft end and the liquid leakage point of the rotating component. When the rotating component is a rotating disk, the mechanical liquid blocking block is fixed to the rotating disk, and the negative pressure adsorption chamber surrounds the outer circumference of the rotating disk.

[0048] The negative pressure adsorption chamber 3 of the present invention is connected to the liquid seepage area 31 of the rotating component, or the new negative pressure adsorption chamber surrounds the liquid seepage area of the rotating component. Therefore, the liquid in the liquid seepage area 31 of the rotating component will be absorbed by the negative pressure adsorption chamber and then thrown out from the through hole to the liquid area, preventing leakage outside the housing.

[0049] Example 2:

[0050] The mechanical liquid blocking block has an isolating member for isolating the liquid seepage portion of the rotating component from the liquid zone. In one example, the isolating member is a boss provided on the rotating component, and the boss wall isolates the liquid seepage portion of the rotating component from the liquid zone.

[0051] In this example, the rotating component and the boss are integrally formed. For example, the rotating component is a stepped shaft, and the boss is equivalent to a step on the shaft, and the step is provided at the seepage location of the rotating component.

[0052] A cavity is created on the stepped surface near the shaft body, and a through-hole is drilled into the cavity toward the outer circumference of the stepped surface. This cavity forms a negative pressure adsorption chamber. The mechanical structure includes a sealing ring, a non-rotating component fixed to the housing 5 and integrally fixed to the housing. This sealing ring is a rubber or metal sealing ring that fits closely against the side of the stepped surface, isolating the negative pressure adsorption chamber from the liquid zone.

[0053] Another example is that the sealing ring of the mechanical structure is extended into the cavity, the sealing ring is closely close to the inner circular surface of the cavity, and the remaining space in the cavity still forms a negative pressure adsorption chamber.

[0054] Example 3:

[0055] refer to Figure 1 、 2 4. The mechanical liquid blocking block has an isolating member for isolating the liquid seepage area of the rotating component from the liquid area. In one example, the isolating member 1 is a ring that is sleeved on the rotating component 2.

[0056] In this example, the wall of the ring separates the negative pressure adsorption chamber from the liquid zone, and the through hole 8 passes through the wall of the ring. The ring has a sealing ring adapted to the mechanical structure and forms an adapting surface 9 of the negative pressure adsorption chamber with the sealing ring of the mechanical structure. In one example, the ring is fixed to the rotating component and is close to the liquid leakage point of the rotating component (generally, the shaft part close to the housing). The inner circle of the ring is the mounting surface 11, which is installed on the rotating component by expansion or other means. A sealing ring 7 is provided on the housing 5 and surrounds the shaft part. One side of the sealing ring is in close contact with one wall of the ring. Therefore, the wall of the ring in close contact with the sealing ring is the adapting surface. The space formed by the sealing ring and one wall of the ring is the negative pressure adsorption chamber 3.

[0057] Example 4:

[0058] refer to Figure 5 Another example is that the isolating member is an isolation disk that is sleeved on the rotating component. The rotating component 2 is the end of the shaft. The shaft extends from the outside of the shell into the inside of the shell. The liquid easily seeps out from the shaft insertion point. Therefore, the shaft insertion point is the leakage point of the rotating component. In this case, the mounting surface is the side of the isolation disk close to the shaft end. The isolation disk is fixed to the shaft end by drilling screw holes from the other side of the isolation disk to the shaft end and then tightening the screws. The isolation disk is concentric with the shaft end. At this time, a sealing ring 7 is provided on the shell and sleeved on the shaft end. One side of the sealing ring is in close contact with the side of the isolation disk. Therefore, the side of the isolation disk that is in close contact with the sealing ring is the matching surface. The space formed by the side of the sealing ring and the isolation disk is the negative pressure adsorption chamber 3.

[0059] The side wall of the ring is a mounting surface, and the ring is mounted on the rotating component by fasteners.

[0060] The matching surface is the side wall of the ring.

[0061] Example 5:

[0062] refer to Figure 1 、 2 4. The spacer is fixed to the rotating component 2 through the mounting surface 11; the spacer is a ring, the inner surface of the inner hole of the ring is adapted to the mounting surface of the rotating component, and is installed through the hole-shaft matching, by expansion, or by dividing the ring into two semicircles (reference Figure 3 ), or divided into three arc-shaped surfaces, which are then fastened together by screws to form a full circle.

[0063] The inner circle of the ring is the mounting surface, and the ring is mounted on the rotating component by fasteners.

[0064] The inner circular surface of the ring is a step surface, and one of the inner circular surfaces is an adapting surface.

[0065] A flange 6 is provided on the outer circumferential surface of the ring, and the flange 6 is located between the end surface of the ring close to the negative pressure adsorption chamber and the front end of the through hole.

[0066] refer to Figure 5 Another example is when the rotating component is a shaft end, and the shaft extends from outside the housing into the inside. Liquid easily leaks out from the shaft insertion point, so the shaft insertion point becomes the leakage point of the rotating component. In this case, the mounting surface is the sidewall of the ring. The ring is secured to the shaft end by drilling screws from the other side of the ring toward the shaft end and then tightening them with screws, ensuring the ring and shaft end are concentric. In this case, a sealing ring 7 is installed on the housing and fits over the shaft end. One side of the sealing ring is in close contact with the side of the ring, so the side of the ring that is in close contact with the sealing ring is the mating surface. The space formed by the sealing ring and the side of the ring is the negative pressure adsorption chamber.

[0067] Example 6:

[0068] refer to Figure 1 、 2 4. Another example is that the isolating member is a ring, the inner hole of the ring is a stepped hole, wherein the inner circular surface of the small hole of the stepped hole is the mounting surface, and the rotating member is a shaft, which extends outward from the inside of the housing. Liquid easily leaks out from the extended part of the shaft, so the extended part becomes the leakage point of the rotating member 31. The ring is clamped on the shaft by expansion, or the ring is divided into two semicircles (refer to Figure 3 ), or divided into three arc-shaped surfaces, which are then fastened together by screws to form a full circle.

[0069] The large hole is brought closer to the housing, forming a cavity between the large hole and the shaft. A hole is then opened in the outer circumference of the ring, creating a negative pressure adsorption chamber. The mechanical structure includes a sealing ring 7, a non-rotating component fixed to the housing 5 and integrally fixed to the housing. For example, a palace-shaped sealing ring is used. The side of the sealing ring is closely adjacent to the side of the large hole, isolating the negative pressure adsorption chamber from the liquid zone.

[0070] Another example involves inserting a mechanical seal ring into a large hole, with the outer surface of the seal ring closely aligned with the inner surface of the large hole. A negative pressure adsorption chamber is formed in the remaining space between the seal ring side and the step surface between the large hole and the small hole. In this example, the inner surface of the large hole of the step hole serves as the mating surface.

[0071] Another example is a large hole with a tapered inner surface, where the end closest to the small hole is the large diameter end, and the end farther from the small hole is the small diameter end. When liquid enters the large hole, it is more likely to be thrown into the large diameter end. Positioning the through-hole tail at the large diameter end makes it easier for liquid to enter.

[0072] Example 7:

[0073] In Example 2, it is shown that the boss is placed close to the shaft body and a cavity is opened from the step surface, wherein the cavity forms a negative pressure adsorption chamber.

[0074] In Example 6, it is shown that the inner hole of the ring is a stepped hole, and a cavity is formed between the large hole and the shaft. The cavity is opened to the outer circumferential surface of the ring, and the cavity forms a negative pressure adsorption chamber.

[0075] In the above-mentioned Example 2 and Example 6, a preferred solution is provided: a liquid collecting tank 10 is provided in the cavity.

[0076] refer to Figure 2 、 6 In Example 2, the liquid collecting tank 10 is arranged at the bottom corner of the inner circular surface of the cavity; in this example, the through hole connects the liquid collecting tank and the outer wall of the boss.

[0077] In Example 6, a liquid collecting trough is provided between the small hole and the large hole of the step hole, which is equivalent to the liquid collecting trough being close to the step between the small hole and the large hole, and the inner diameter of the liquid collecting trough is larger than the large hole of the step hole.

[0078] In this example, the through hole connects the liquid collecting groove with the outer wall of the ring. The liquid collecting groove is used to collect liquid that penetrates into the negative pressure adsorption chamber and then throw it out through the through hole.

[0079] The liquid collecting trough is preferably a deep V-shaped trough, but it can also be a flat-bottomed trough or a trapezoidal trough.

[0080] Example 8:

[0081] refer to Figure 2The outer surface of the isolator is a stepped structure. The side close to the housing (equivalent to the side close to the liquid leakage of the rotating component) is a high step, which uses the step to prevent some liquid from entering the liquid leakage of the rotating component. The side away from the housing is a low step. The front end of the through hole passes through the low step. The low step is close to the liquid area in the housing, so the liquid ejected from the through hole enters the liquid area. Another function of the high step is to block the liquid ejected from the through hole.

[0082] Example 9:

[0083] The through hole 8 passes through the isolation piece 1, connecting the negative pressure adsorption chamber 3 with the liquid area 4, and throwing the liquid accumulated in the negative pressure adsorption chamber 3 into the liquid area 4. Therefore, the through hole is equivalent to the impeller of a centrifugal pump, and the principle of throwing out the liquid is similar to that of a centrifugal pump.

[0084] The number of through-holes is 2-12, equidistantly distributed around the circumference of the isolator. In one example, there are two through-holes with larger diameters, symmetrically distributed around the circumference of the isolator, and the liquid flow rate and flow rate within the through-holes are sufficient to meet the liquid accumulation volume of the negative pressure adsorption chamber. In another example, there are 12 through-holes, equidistantly distributed around the circumference of the isolator, and the liquid flow rate and flow rate within the through-holes are sufficient to meet the liquid accumulation volume of the negative pressure adsorption chamber.

[0085] The central axis of the through hole 8 is not parallel to the rotation axis of the rotating component. If the through hole is connected to the liquid area from the negative pressure adsorption chamber in a direction parallel to the axis of the rotating component, the liquid in the through hole cannot be thrown from the tail end to the front end, and of course, negative pressure cannot be formed at the seepage point of the rotating component. Therefore, the through hole must form a certain angle with the axis of the rotating component: the end in the negative pressure adsorption chamber is the tail end of the through hole, and the end in the liquid area is the front end of the through hole. The tail end of the through hole is closer to the axis of the rotating component, while the front end of the through hole is away from the axis of the rotating component. When the through hole rotates around the axis of the rotating component, the liquid will form centrifugal force and be thrown from the tail end to the front end and then out of the through hole. Figure 6 , one example is that the central axis of the through hole is perpendicular to the rotation axis of the rotating component. Another example is that the central axis of the through hole forms an angle of 0°-90° with the rotation axis of the rotating component. Of course, the larger the angle, the stronger the centrifugal force. Therefore, the central axis of the through hole and the rotation axis of the rotating component preferably form an angle of 45°-90°. For ease of processing, the central axis of the through hole is a straight line. Of course, in this example, when the central axis of the through hole is not a straight line, it is also necessary to satisfy that the central axis is not parallel to the rotation axis of the rotating component. Specifically, the straight line connecting the centers of the end faces of the front end and the tail end of the through hole is regarded as the central axis of the through hole, so that the central axis regarded as the through hole satisfies the non-parallel rotation axis of the rotating component.

[0086] refer to Figure 7 、 8, with the end in the negative pressure adsorption chamber as the tail end of the through hole, and the end in the liquid area as the front end of the through hole. In order to allow the liquid to be thrown out smoothly, the front end of the through hole is not tilted in the direction of rotation. Taking the tangent of the outer circle of the rotating shaft as the standard, the through hole 8 can be arranged along the perpendicular direction of the tangent. Similarly, the tail end of the through hole can also be arranged behind the perpendicular line. Regardless of whether the central axis of the through hole is a straight line or the central axis of the through hole is in a non-linear state, the front end of the through hole is not tilted in the direction of rotation. For example, when the central axis of the through hole 8 is in a non-linear state, the front end of the through hole is tilted to the opposite side of the rotation direction; or the through hole is perpendicular to the tangent of the rotating circle of the rotating component. Because if the front end of the through hole points to the direction of rotation, during the rotation process, the front end will input positive air pressure into the through hole to prevent the liquid from being thrown out.

[0087] refer to Figure 6 、 8 In the present invention, the central axis of the through hole 8 can be an arc or a broken line. Of course, for ease of processing, the central axis of the through hole is preferably a straight line.

[0088] The through hole passes through the negative pressure area to the liquid area, specifically, is connected from the liquid collecting tank in the negative pressure area to the liquid area.

[0089] Example 7:

[0090] refer to Figure 9 The mechanical structure comprises at least one rotating component 2 (especially a rotating shaft) having a liquid area 4, on which the mechanical liquid blocking block of the above example is arranged.

[0091] The isolation piece of the mechanical liquid blocking block is arranged between the liquid seepage point of the rotating component and the liquid area 4.

[0092] The mechanical structure has a sealing ring 7 , and the sealing ring isolates the liquid seepage 31 of the rotating component from the liquid area 4 .

[0093] The mechanical structure of this example can be a gear reducer, wherein the reducer housing has a gear and a gear shaft, and the mechanical liquid blocking blocks are arranged at both ends of the gear shaft and are located in a position within the reducer housing. The reducer housing is provided with a sealing ring that cooperates with the matching surface of the mechanical liquid blocking block. The ends of the gear shaft are the places where the rotating component leaks.

[0094] The mechanical structure of this example may be a bearing box, wherein the housing of the bearing box is a shell 5 having a shaft extending from the housing, and a mechanical liquid blocking block of the present invention is provided at the location where the shaft passes through the housing.

[0095] The above is an exemplary description of the present invention and does not represent the scope of protection of the present invention.

[0096] The above examples can be combined to generate new examples, but when combining, it is necessary to consider whether they conform to the concept of the present invention, especially whether they are contrary to the concept of the present invention. If the combination of certain examples will have a counterproductive effect on the effect of the present invention or be contrary to the concept of the present invention, such combination should be abandoned.

Claims

1. Mechanical liquid blocking block, set on the rotating component in the mechanical structure, characterized in that: have: An isolator isolating the liquid leakage portion of the rotating component from the liquid area; the isolator is fixed to the rotating component and rotates synchronously with the rotating component; the isolator is a boss provided on the rotating component, and the boss wall isolates the liquid leakage portion of the rotating component from the liquid area; the isolator includes at least one mounting surface adapted to the rotating component, and the isolator is fixed to the rotating component via the mounting surface; A negative pressure adsorption chamber located at the point where the rotating parts leak; A plurality of through holes are connected to the negative pressure adsorption chamber and the liquid area, and the through holes pass through the isolation piece; the central axis of the through hole is not parallel to the rotation axis of the rotating component; the end located in the negative pressure adsorption chamber is the tail end of the through hole, and the end located in the liquid area is the front end of the through hole, wherein the front end of the through hole is not inclined in the direction of rotation.

2. The mechanical liquid blocking block according to claim 1, characterized in that: There are 2 to 12 through holes, which are evenly distributed on the rotating circumference of the isolation piece.

3. The mechanical liquid blocking block according to claim 1, characterized in that: The central axis of the through hole is one of an arc and a broken line; wherein, when the central axis of the through hole is one of an arc and a broken line: The central axis of the through hole is not parallel to the rotation axis of the rotating component, specifically, a straight line connecting the centers of the end faces of the front end and the rear end of the through hole forms an angle greater than 0° and less than 90° with the rotation axis of the rotating component; The front end of the through hole is not inclined in the rotation direction, specifically, the center connecting straight line of the end surface of the front end and the rear end of the through hole is not inclined in the rotation direction.

4. The mechanical liquid blocking block according to claim 1, characterized in that: The central axis of the through hole is a straight line; The central axis of the through hole is not parallel to the rotation axis of the rotating component, specifically one of the following: (1) The central axis of the through hole is perpendicular to the rotation axis of the rotating component; (2) The central axis of the through hole forms an angle with the rotation axis of the rotating component that is greater than 0° and less than 90°; The front end of the through hole is not inclined in the rotation direction, specifically one of the following: (1) The front end of the through hole is tilted toward the opposite side of the rotation direction; (2) The through hole is perpendicular to the tangent of the rotation circle of the rotating component.

5. The mechanical liquid blocking block according to claim 1, characterized in that: The isolating member is a ring sleeved on the rotating component, the wall of the ring isolates the negative pressure adsorption chamber from the liquid area, and the through hole passes through the wall of the ring; the ring has a sealing ring adapted to the mechanical housing and forms an adapting surface of the negative pressure adsorption chamber with the sealing ring.

6. The mechanical liquid blocking block according to claim 5, characterized in that: The mounting surface is specifically: The inner surface of the inner hole of the ring is the mounting surface, and the ring is mounted on the rotating component through hole-shaft matching.

7. The mechanical liquid blocking block according to claim 5, characterized in that: Specifically, the mounting surface is a side wall of the ring, and the ring is mounted on the rotating component through fasteners.

8. The mechanical liquid blocking block according to claim 5, characterized in that: A flange is provided on the outer circumferential surface of the ring, and the flange is located between the end surface of the ring close to the negative pressure adsorption chamber and the front end of the through hole.

9. The mechanical liquid blocking block according to claim 5, characterized in that: The adapting surface is one of the following: (1) The side wall of the ring; (2) The inner hole of the ring is a stepped hole, wherein the inner circular surface of the small hole of the stepped hole is the mounting surface, and the inner circular surface of the large hole of the stepped hole is the adapting surface.

10. The mechanical liquid blocking block according to claim 9, characterized in that: A negative pressure adsorption chamber is formed in the large hole; a liquid collecting tank is arranged between the small hole and the large hole of the step hole; and the through hole communicates with the liquid collecting tank and the outer wall of the ring.

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