Novel oil film bearing seat negative pressure pipe

Abstract

The utility model provides a novel oil film bearing seat negative pressure pipe, including first pipeline, second pipeline, water absorption part and condensing needle subassembly, the pipe diameter of second pipeline is greater than the pipe diameter of first pipeline, condensing needle subassembly is built -in second pipeline and is located in one end close to first pipeline, and water absorption part is built -in first pipeline. Such adoption small pipe diameter's first pipeline links to the second pipeline of big pipe diameter produces the variable diameter, makes the negative pressure pressure release when variable, greatly reduces negative pressure pipeline export negative pressure, and big pipe diameter can effectively isolate water source direct contact with small pipe diameter direct contact, cannot form effective sealing surface, thereby destroys the basic condition of negative pressure siphon, prevents the water of negative pressure pipe, and condensing needle subassembly can effectively prevent water vapor in the whole negative pressure pipe inside forms the condensed water, and still built -in water absorption part to make the water vapor of condensed phenomenon not in time produces by its secondary adsorption, realizes secondary waterproof, greatly improved the waterproof function of oil film bearing seat.

Description

Technical Field

[0001] This utility model relates to the field of waterproof oil film bearing housing technology, and in particular to a novel negative pressure pipe for oil film bearing housing. Background Technology

[0002] Currently, all metallurgical plants use oil film bearing housings for their support rollers. Water ingress into oil film bearing housings has always been a problem that has plagued steel plants. From the site observation, the possible water ingress points are in the water seal, oil seal, negative pressure pipe, etc. All metal contact surfaces of the bearing housing are coated with sealant and then tightened with bolts, so the possibility of water ingress is not high. The seal has evolved from the initial Morgan-designed "X" type seal to the current DF-labyrinth seal, and there are also two layers of water seals on the outside, which can effectively prevent external water from entering the bearing housing.

[0003] However, the negative pressure pipes in the existing technology use small diameter pipes, so when they come into contact with small water droplets, there is still a possibility of water entering. Because the change in the operating speed of the bearing housing itself will cause different internal temperatures of the bearing housing, and some heat will be carried away by the thin oil, the temperature is in a state of constant change. Therefore, the bearing housing will produce a "breathing phenomenon". Since the breathing pipe on site is basically "soaked" in water, water will be brought into the bearing housing when the bearing housing "breathes".

[0004] Therefore, it is necessary to propose a new type of oil film bearing housing negative pressure pipe to solve or at least alleviate the above-mentioned defects. Utility Model Content

[0005] The main purpose of this utility model is to provide a new type of oil film bearing housing negative pressure pipe to solve the problem that water absorption still occurs in the bearing housing when using small-diameter negative pressure pipes in the existing technology.

[0006] To achieve the above objectives, this utility model provides a novel oil film bearing housing negative pressure pipe, comprising a first pipe, a second pipe, a water suction section, and a condensation needle assembly; wherein,

[0007] The first end of the first pipe is used to connect to the negative pressure hole of the bearing housing cover, the second end of the first pipe is connected to the second pipe, the diameter of the second pipe is larger than the diameter of the first pipe, the condenser needle assembly is built into the second pipe and is located at one end close to the first pipe, and the water absorption part is built into the first pipe.

[0008] Preferably, the first end port of the first pipe is a tapered opening, which is used to be built into the small cover of the bearing seat.

[0009] Preferably, the water-absorbing part is a water-blocking area formed inside the first pipe, and the water-blocking area is coated with water-absorbing material.

[0010] Preferably, the condenser needle assembly includes a plurality of dispersed condenser needles, one end of which is connected to the inner end wall of the second pipe near the first pipe.

[0011] Preferably, a group of condensing needles arranged in a ring array is a group of condensing needles, and there are three groups of condensing needles, with the number of condensing needles in each group gradually increasing from the inside to the outside.

[0012] Preferably, the absorbent material is a sponge.

[0013] Preferably, a sealing ring is provided between the first end port of the first pipe and the negative pressure hole of the bearing housing cover.

[0014] Preferably, the portion of the first pipe near the first end is bent.

[0015] Preferably, the water-absorbing part is located near the bend in the first pipe.

[0016] Preferably, the section of the first pipe where the water-absorbing part is located is connected to the adjacent first pipe section by a threaded connection for detachable connection.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This utility model provides a novel negative pressure pipe for an oil film bearing housing, comprising a first pipe, a second pipe, a water-absorbing part, and a condensation needle assembly. The first end of the first pipe connects to the negative pressure hole of the bearing housing cap, and the second end of the first pipe connects to the second pipe. The diameter of the second pipe is larger than that of the first pipe. The condensation needle assembly is built into the second pipe and positioned near the end of the first pipe, while the water-absorbing part is built into the first pipe. This connection between the small-diameter first pipe and the large-diameter second pipe creates a diameter change, releasing negative pressure and significantly reducing the negative pressure at the pipe outlet. The larger diameter effectively prevents direct contact between the water source and the smaller diameter pipe, preventing the formation of an effective sealing surface and thus disrupting the basic conditions for negative pressure siphoning, preventing water ingress into the negative pressure pipe. The condensation needle assembly effectively prevents water vapor from condensing inside the entire negative pressure pipe, and the built-in water-absorbing part allows for the re-absorption of water vapor that has not yet condensed, achieving secondary waterproofing and significantly improving the waterproof function of the oil film bearing housing. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a cross-sectional schematic diagram of the overall structure in one embodiment of the present invention;

[0021] Figure 2 for Figure 1 A schematic diagram of the cross-section along the AA direction.

[0022] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0023] Explanation of icon numbers:

[0024] 110. First pipe; 111. Conical inlet; 120. Second pipe; 130. Water suction section; 140. Condensation needle. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0029] Please see the appendix Figure 1-2 The present invention provides a novel oil film bearing seat negative pressure pipe in one embodiment, comprising a first pipe 110, a second pipe 120, a water absorption part 130, and a condensation needle assembly, the specific details of which are as follows:

[0030] The first end of the first pipe 110 is used to connect to the negative pressure hole of the bearing seat cover. The second end of the first pipe 110 is connected to the second pipe 120. The diameter of the second pipe 120 is larger than the diameter of the first pipe 110. The condenser needle assembly is built into the second pipe 120 and is located near one end of the first pipe 110. The water absorption part 130 is built into the first pipe 110.

[0031] Specifically, assuming the cavity is not filled with oil, if the bearing housing temperature rises from 20℃ to 40℃, based on the air expansion coefficient: ΔV=V0*α*ΔT, it can be roughly estimated that the expansion amount when the bearing housing temperature rises from 20℃ to 40℃ is approximately 0.021m. 3 "Approximately" means that 0.02m will be generated during each heating and cooling process of the bearing housing. 3 The left and right air intake / exhaust volumes (the above data ignores the influence of air pressure, etc.) indicate that the internal space of the oil film bearing housing in this application is approximately 0.3m², as calculated from the drawings. 3The left and right cavities (i.e., air is present) contain water. According to fluid mechanics, when two upright pipes are placed in water under the same conditions, the pressure change at the upper pipe opening has a greater impact on the water level of the pipe with the smaller diameter (Note: one standard atmosphere is approximately equal to 10.339 meters of water column height). Furthermore, the high-speed flow of oil within the support roller bearing housing also creates a siphon effect. This demonstrates that using a small-diameter steel pipe allows water to enter even with slight negative pressure (e.g., the presence of a small water droplet on the outside can establish suction conditions). The principle is that when fluid flows in a pipe, the smaller the diameter, the higher the fluid velocity. According to Bernoulli's principle, increased velocity leads to a decrease in local pressure (creating a relative negative pressure). Smaller pipe diameters are more sensitive to pressure changes. When the bearing housing experiences pressure fluctuations due to "breathing" (temperature changes causing internal air expansion or contraction), the pressure change amplitude within the smaller-diameter pipe is significantly greater than that within the larger-diameter pipe, making it more prone to pressure fluctuations. A strong negative pressure is generated, and using a slightly larger diameter pipe as the negative pressure pipe also results in severe water ingress due to condensation. Therefore, the novel oil film bearing housing negative pressure pipe of this application includes a first pipe 110, a second pipe 120, a water suction part 130, and a condensation needle assembly. It uses two pipes with different diameters connected to release the negative pressure through a diameter change. The diameter of the second pipe 120 is larger than that of the first pipe 110. The smaller diameter first pipe 110 is the high-pressure zone, while the larger diameter second pipe 120 is the low-pressure release zone, thereby reducing the negative pressure at the outlet of the entire pipe (the bottom outlet of the second pipe 120) and thus preventing water ingress. The larger diameter second pipe 120 can also effectively prevent the water source from directly contacting the smaller diameter first pipe 110, thus preventing the formation of an effective sealing surface and destroying the basic conditions for negative pressure siphon, preventing water from entering the entire negative pressure pipe.

[0032] Furthermore, since water vapor condenses inside the pipe when the temperature is low, the condensation needle assembly can be installed to prevent condensation from forming inside the pipe. Instead, condensation occurs directly on the condensation needle assembly and drips off. The condensation needle assembly can be configured to include multiple dispersed condensation needles 140 to improve the effect of concentrating condensation at the condensation needles 140 and preventing it from forming inside the pipe. The water absorption part 130 is installed inside the first pipe 110 to form a secondary protection. When water vapor fails to condense in time, it can be absorbed by the water absorption part 130 inside the first pipe 110, thus effectively preventing water vapor from entering the bearing housing and further improving the waterproof effect. Preferably... The water-absorbing part 130 can be installed in a water-proof area within the first pipe 110 to adhere the water-absorbing material. This facilitates installation and connection. The water-absorbing material can be a sponge, which has a porous structure with high porosity and interwoven internal channels. It can quickly absorb water vapor that has not condensed in time in the small-diameter pipe through the condensation needle 140. Through physical adsorption, it blocks water vapor from entering the bearing housing, supplementing the moisture-proof effect of the condensation needle 140, thus meeting the design goal of "completely blocking water vapor". In addition, the sponge is soft and can be flexibly cut or filled according to the shape of the inner wall of the small-diameter pipe, closely adhering to the inner wall of the pipe. It will not affect the airflow due to structural rigidity (it will not hinder the air exchange required for the bearing housing to "breathe"), and at the same time, it can make full use of the internal space of the small-diameter pipe to achieve comprehensive adsorption.

[0033] In a preferred embodiment of the present invention, the first end port of the first pipe 110 is a tapered opening 111, which is used to be built into the small cover of the bearing seat.

[0034] It should be noted that the conical opening 111 can change the flow direction of the oil, reduce the oil splashing caused by the centrifugal force generated by the rotation of the roller, and improve the sealing and leak-proof effect. Therefore, after the first end port of the first pipe 110 is connected to the negative pressure hole of the bearing seat cover (not shown in the figure), the protruding conical opening 111 is built into the bearing seat cover. Furthermore, a sealing ring can be set between the first end port of the first pipe 110 and the negative pressure hole of the bearing seat cover to enhance the connection sealing between the conical opening and the cover, which reduces oil splashing and prevents external moisture from seeping in from the interface gap.

[0035] In a preferred embodiment of the present invention, a plurality of condensing needles 140 arranged in a ring array form a group of condensing needles. There are three groups of condensing needles, and the number of condensing needles 140 in each group gradually increases from the inside to the outside.

[0036] It is worth noting that the more condensation needles 140 there are, the better the effect of preferentially forming condensation at the condensation needles 140. By adopting multiple sets of condensation needles with the number increasing layer by layer from the inside to the outside, the distribution is more uniform, thereby increasing the contact area and contact path length between the condensation needles 140 and the water vapor in the large-diameter internal space. This makes it easier for water vapor to collide with the condensation needles 140 and condense on their surface, thereby improving condensation efficiency, reducing the possibility of water vapor forming condensate on the pipe walls of large and small diameter pipes, and further optimizing the anti-water ingress effect.

[0037] Furthermore, the portion of the first pipe 110 near the first end is bent.

[0038] It should be noted that straight pipe structures can easily allow external water pressure or negative pressure to be directly transmitted to the inside of the bearing housing, increasing the risk of water ingress. In contrast, the bent design can change the flow path of air and liquid, increase fluid resistance, weaken the transmission efficiency of negative pressure siphon, reduce the impact of siphon effect caused by "breathing phenomenon" or high-speed oil flow on the inside of the bearing housing, and further block the driving force of water ingress.

[0039] Furthermore, the water-absorbing part 130 is positioned near the bend of the first pipe 110.

[0040] It should be noted that the location near the bearing housing (i.e., the bend in the first pipe 110) is the last path for water vapor to enter the bearing housing. Therefore, the water absorption part 130 is set here as a progressive final protection for secondary adsorption, ensuring the final protection effect.

[0041] Furthermore, the section of the first pipe 110 where the water-absorbing part 130 is located is connected to the adjacent section of the first pipe 110 by a threaded connection for detachable connection.

[0042] Understandably, by setting the first pipe 110 into two sections with threaded connections, the water-absorbing part 130 is placed close to the edge of the section. This facilitates the replacement of the water-absorbing material later. The water-absorbing material can be replaced simply by loosening and unscrewing, and a good sealing effect can still be guaranteed after tightening. It is easy to disassemble and assemble.

[0043] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A novel oil film bearing housing negative pressure pipe, characterized in that, It includes a first pipe, a second pipe, a water absorption section, and a condensation needle assembly; among which, The first end of the first pipe is used to connect to the negative pressure hole of the bearing housing cover, the second end of the first pipe is connected to the second pipe, the diameter of the second pipe is larger than the diameter of the first pipe, the condenser needle assembly is built into the second pipe and is located at one end close to the first pipe, and the water absorption part is built into the first pipe.

2. The novel oil film bearing housing negative pressure pipe according to claim 1, characterized in that, The first end port of the first pipe is a tapered opening, which is used to be built into the small cover of the bearing seat.

3. The novel oil film bearing housing negative pressure pipe according to claim 2, characterized in that, The water-absorbing part is a water-blocking zone formed inside the first pipe, and water-absorbing material is adhered to the water-blocking zone.

4. The novel oil film bearing housing negative pressure pipe according to claim 1, characterized in that, The condenser needle assembly includes a plurality of dispersed condenser needles, one end of which is connected to the inner end wall of the second pipe near the first pipe.

5. The novel oil film bearing housing negative pressure pipe according to claim 4, characterized in that, Multiple condensing needles arranged in a ring array constitute a group of condensing needles. There are three groups of condensing needles, and the number of condensing needles in each group gradually increases from the inside to the outside.

6. The novel oil film bearing housing negative pressure pipe according to claim 3, characterized in that, The absorbent material is a sponge.

7. The novel oil film bearing housing negative pressure pipe according to claim 2, characterized in that, A sealing ring is provided between the first end port of the first pipe and the negative pressure hole of the bearing housing cover.

8. The novel oil film bearing housing negative pressure pipe according to claim 7, characterized in that, The portion of the first pipe near its first end is bent.

9. The novel oil film bearing housing negative pressure pipe according to claim 8, characterized in that, The water-absorbing part is located near the bend in the first pipe.

10. The novel oil film bearing housing negative pressure pipe according to claim 9, characterized in that, The section of the first pipe where the water-absorbing part is located is connected to the adjacent first pipe section by a threaded connection for detachable connection.

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