Water-lubricated bearing and condensate pump

Abstract

The present invention relates to a water-lubricated bearing and a condensate pump. The above-mentioned water-lubricated bearing includes a water-lubricated bearing bush, a first bushing, a second bushing and a shock absorber; the water-lubricated bearing bush is used to be sleeved outside the pump shaft; the first bushing, the second bushing and the shock absorber are all cylindrical. The inner side wall of the first bushing is connected to the outer side wall of the water-lubricated bearing bush, the outer side wall of the first bushing is connected to the inner side wall of the shock absorber, and the outer side wall of the shock absorber is connected to the inner side wall of the second bushing; wherein, the first bushing is used to be connected to the hull; the shock absorber is provided with a cavity, and the cavity has an initial state and a deformed state. When the shock absorber is squeezed, the cavity can be switched from the initial state to the deformed state. The present invention can achieve uniform load bearing of the water-lubricated bearing under various operating conditions, improve the lubrication state of the water-lubricated bearing, reduce the phenomenon of eccentric wear of the bearing, increase the service life of the bearing, reduce the abnormal friction vibration of the bearing, and thus improve the reliability of the operation of the water-lubricated bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of condensate pumps, and particularly to a water-lubricated bearing and a condensate pump. Background Art

[0002] The water-lubricated bearing on the condensate pump is mainly arranged between the first-stage and second-stage impellers and is used to support the impeller rotor shaft, so as to ensure the stable rotation of the propulsion shafting.

[0003] The water-lubricated bearing is liable to be impacted or subjected to impact loads. During the operation of the two-stage impellers of the water-lubricated bearing, skew phenomena will occur under the impact loads, resulting in large local bearing of the water-lubricated bearing, occurrence of eccentric wear phenomena, reduction of the bearing service life, abnormal vibration of the impeller rotor, affecting the hydraulic performance of the condensate pump, and greatly affecting the function of the condensate pump. Summary of the Invention

[0004] The present invention provides a water-lubricated bearing and a condensate pump to solve or improve the problem that the water-lubricated bearing on existing ships is liable to skew, resulting in poor operation reliability.

[0005] In a first aspect, the present invention provides a water-lubricated bearing, including: a water-lubricated bearing bush, a first bushing, a second bushing and a shock absorber;

[0006] The water-lubricated bearing bush is used to be sleeved outside the pump shaft;

[0007] The first bushing, the second bushing and the shock absorber are all in a cylindrical shape. The inner side wall of the first bushing is connected to the outer side wall of the water-lubricated bearing bush. The outer side wall of the first bushing is connected to the inner side wall of the shock absorber. The outer side wall of the shock absorber is connected to the inner side wall of the second bushing. Wherein, the first bushing is used to be connected to the pump body;

[0008] The shock absorber is provided with a cavity, and the cavity has an initial state and a deformed state. When the shock absorber is subjected to extrusion, the cavity can be switched from the initial state to the deformed state.

[0009] According to the water-lubricated bearing provided by the present invention, the shock absorber is made of a high-damping non-metallic material.

[0010] According to the water-lubricated bearing provided by the present invention, the cavity is elliptical and is coaxially arranged with the shock absorber.

[0011] According to the water-lubricated bearing provided by the present invention, in the initial state, the distance between the cavity wall close to the second bushing and the cavity wall close to the first bushing is a first distance; in the deformed state, the distance between the cavity wall close to the second bushing and the cavity wall close to the first bushing is a second distance;

[0012] Wherein, the first spacing is greater than the second spacing.

[0013] According to a water lubricated bearing provided by the present invention, the size of the first spacing is 1 / 2 to 3 / 4 of the sum of the radial thickness dimensions of the water lubricated bearing bush, the first bushing, the second bushing and the vibration damping member.

[0014] According to a water lubricated bearing provided by the present invention, the inner side wall and the outer wall surface of the vibration damping member are respectively vulcanized and connected to the outer side wall of the first bushing and the inner side wall of the second bushing.

[0015] According to a water lubricated bearing provided by the present invention, the water lubricated bearing bush is a non-metallic water lubricated bearing bush.

[0016] According to a water lubricated bearing provided by the present invention, the inner side wall of the first bushing is connected to the outer side wall of the water lubricated bearing bush by cold shrinking.

[0017] In a second aspect, the present invention further provides a condensate pump, comprising: a pump shaft and the water lubricated bearing as described in any one of the first aspect;

[0018] The water lubricated bearing is sleeved on the pump shaft.

[0019] According to a condensate pump provided by the present invention, an annular gap is provided between the inner side wall of the water lubricated bearing bush and the outer side wall of the pump shaft, and the annular gap is used to fill with liquid to form a supporting liquid film.

[0020] For the water lubricated bearing provided by the present invention, by arranging a vibration damping member between the first bushing and the second bushing, a cavity is provided inside the vibration damping member, and the cavity can be deformed under the action of pressure to generate a damping and vibration reduction effect. That is, when an external impact load acts on the outer side wall of the second bushing, the second bushing can utilize the damping effect of the vibration damping member and the deformation of its cavity to provide a certain angle compensation, so that the water lubricated bearing can dynamically adapt to the deflection angle of the impeller rotor shaft, hinder the transmission of vibration, weaken the impact load, reduce the impact force of the impact load on the water lubricated bearing bush, and further reduce the impact force of the impact load on the pump shaft of the pipe pump shaft, realizing uniform bearing of the water lubricated bearing under various operating conditions, improving the lubrication state of the water lubricated bearing, reducing the bearing partial wear phenomenon, increasing the bearing service life, reducing the abnormal friction vibration of the bearing, and thus improving the reliability of the operation of the water lubricated bearing.

[0021] Furthermore, for the condensate pump provided by the present invention, since it adopts the water lubricated bearing as described above, it also has the same advantages as described above. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic structural diagram of the water-lubricated bearing provided by the present invention;

[0024] Reference numerals:

[0025] 1: water-lubricated bearing bush; 2: first bushing; 3: second bushing; 4: vibration damping member; 41: cavity; 5: pump shaft. Specific embodiments

[0026] To make the objectives, technical solutions and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention with reference to the drawings in the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments in the present invention belong to the scope of protection of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the embodiments of the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0029] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0030] Existing bearings generally consist of a bearing bushing and a shaft sleeve, without corresponding vibration damping measures. During operation, the two-stage impellers of the bearing will exhibit a skew phenomenon, resulting in a relatively large local load on the water-lubricated bearing, causing eccentric wear, reducing the service life of the bearing, making the impeller rotor vibrate abnormally, and affecting the hydraulic performance of the condensate pump. The skew phenomenon also changes dynamically with the working conditions. The condensate pump bearing has no impact protection measures to resist the influence of deformation, which easily causes damage to the structure of the condensate pump and ultimately leads to the loss of the condensate pump's function. Therefore, the current water-lubricated bearing is difficult to dynamically adapt to the dynamic skew angle of the impeller rotor shaft.

[0031] Based on the above problems, the embodiments of the present invention provide a water-lubricated bearing and a thruster to solve or improve the problem that the water-lubricated bearing on existing ships is prone to skew, resulting in poor operating reliability.

[0032] The following combines Figure 1 to describe a water-lubricated bearing and a condensate pump provided by the present invention.

[0033] In the first aspect, as Figure 1 shown, the water-lubricated bearing provided by the embodiments of the present invention includes: a water-lubricated shaft sleeve 1, a first bushing 2, a second bushing 3, and a vibration damping member 4.

[0034] The water-lubricated shaft sleeve 1 is used to be sleeved outside the pump shaft 5.

[0035] The first bushing 2, the second bushing 3, and the vibration damping member 4 are all in a cylindrical shape. The inner side wall of the first bushing 2 is connected to the outer side wall of the water-lubricated shaft sleeve 1. The outer side wall of the first bushing 2 is connected to the inner side wall of the vibration damping member 4. The outer side wall of the vibration damping member 4 is connected to the inner side wall of the second bushing 3. Among them, the first bushing 2 is used to be connected to the hull.

[0036] The vibration damping member 4 is provided with a cavity 41. The cavity 41 has an initial state and a deformed state. When the vibration damping member 4 is squeezed, the cavity 41 can be switched from the initial state to the deformed state.

[0037] Specifically, since the pump shaft 5 is a cylindrical structure, in order to adapt to its structure, the water-lubricated shaft sleeve 1 sleeved outside the pump shaft 5 is also in a cylindrical shape. The inner diameter size of the water-lubricated shaft sleeve is not less than the diameter size of the pump shaft 5. Lubrication between the pump shaft 5 and the water-lubricated shaft sleeve 1 is achieved through a pressure water film to reduce the sliding friction force between the pump shaft 5 and the water-lubricated shaft sleeve 1.

[0038] The first bushing 2 is sleeved outside the water-lubricated shaft sleeve 1, and the inner side wall of the first bushing 2 is attached to the outer side wall of the water-lubricated shaft sleeve 1. In order to ensure that the first bushing 2 does not slip off the water-lubricated shaft sleeve, the water-lubricated shaft sleeve 1 is connected to the first bushing 2 by cold expansion, or the water-lubricated shaft sleeve 1 is connected to the first bushing 2 by bolts.

[0039] The first bushing 2 shown in this embodiment can be a high-damping vibration-damping bushing made of rubber, polymer, etc., which can further protect the water-lubricated bearing 1 on the inner side wall of the first bushing 2 and further achieve the vibration-damping effect.

[0040] The second bushing 3 is sleeved on the outside of the first bushing 2, and the vibration-damping member 4 is arranged between the first bushing 2 and the second bushing 3. That is, the second bushing 3 is connected to the first bushing 2 through the vibration-damping member 4. In order to adapt to the installation of the three, the first bushing 2, the second bushing 3 and the vibration-damping member 4 are all set as annular members. After the three are sleeved and installed, their axes are all consistent with the axes of the water-lubricated bearing 1 and the pump shaft 5.

[0041] The second bushing 3 shown in this embodiment is a metal bearing bushing. The material of the metal bearing bushing can be an anti-corrosion and anti-pollution metal material, such as a copper alloy material or a stainless steel material. While ensuring the bearing capacity, it can also undergo elastic deformation when subjected to impact loads, absorb impact energy, reduce the damage of the impact to the pump body structure, and at the same time has anti-corrosion and anti-pollution properties.

[0042] A cavity 41 is provided inside the vibration-damping member 4. The space of the cavity 41 can change under the action of pressure, that is, it has the functions of generating damping and angle compensation. When the outer side wall of the second bushing 3 is tilted under the action of an external impact load, the cavity 41 in the vibration-damping member 4 can compensate for the deflection angle between the second bushing 3 and the first bushing 2 to reduce the influence of the deformation on the first bushing 2, thereby reducing the transmission of vibration, reducing the vibration of the vibration load on the water-lubricated bearing 1, and further reducing the vibration force of the vibration load on the main shaft 5, improving the reliability of the support shaft transmission.

[0043] The water-lubricated bearing provided by the embodiment of the present invention, by arranging the vibration-damping member 4 between the first bushing 2 and the second bushing 3, and a cavity 41 is provided inside the vibration-damping member 4, and the cavity 41 can deform under the action of pressure to generate a damping and vibration-damping effect. That is, when the outer side wall of the second bushing 3 is subjected to an external impact load, the second bushing 3 can utilize the damping effect of the vibration-damping member 4 and the deformation of its cavity 41 to provide a certain angle compensation, so that the water-lubricated bearing can dynamically adapt to the deflection angle of the impeller rotor shaft, hinder the transmission of vibration, weaken the impact load, reduce the impact force of the impact load on the water-lubricated bearing 1, and further reduce the impact force of the impact load on the pump shaft 5 of the condensate pump, realize uniform bearing of the water-lubricated bearing under various operating conditions, improve the lubrication state of the water-lubricated bearing, reduce the bearing eccentric wear phenomenon, increase the bearing service life, reduce the abnormal friction vibration of the bearing, thereby improving the reliability of the operation of the water-lubricated bearing.

[0044] Furthermore, in order to further enhance the damping effect of the vibration-damping member 4 and reduce the generation of bearing eccentric wear, the vibration-damping member 4 can be made of a high-damping non-metallic material. The high-damping non-metallic material can be rubber or foam, etc.

[0045] In some embodiments, the cavity 41 is oval-shaped and coaxially arranged with the shock absorber 4.

[0046] In the initial state, the distance between the cavity wall of the cavity 41 close to the second bushing 3 and the cavity wall close to the first bushing 2 is the first spacing; in the deformed state, the distance between the cavity wall of the cavity 41 close to the second bushing 3 and the cavity wall close to the first bushing 2 is the second spacing.

[0047] Among them, the first spacing is greater than the second spacing.

[0048] Specifically, the function of the cavity 41 is to provide a space for deformation compensation. By generating compressive deformation, it absorbs part of the impact load to weaken the impact load and reduce the impact force of the impact load on the water-lubricated bearing shell.

[0049] There is no specific limitation on the size of the cavity 41, and it can be set according to actual needs. Its shape can be circular, square, oval, etc. As Figure 1 shown, taking the cavity 41 as an example of an oval shape, the cavity 41 is arranged in a ring shape, and its axis is consistent with the axis of the pump shaft 5.

[0050] In the absence of external pressure, that is, in the initial state, the radial width dimension of the oval cavity 41 is defined as the first spacing. When the second bushing 3 is externally squeezed, the space of the cavity 41 will deform. At this time, the radial width dimension of the oval cavity 41 is defined as the second spacing. After compression deformation, the second spacing will be smaller than the first spacing, thereby absorbing part of the impact load and realizing the buffering and angular compensation of the impact load to avoid affecting the water-lubricated bearing shell inside the first bushing 2.

[0051] In some embodiments, the size of the first spacing is 1 / 2 to 3 / 4 of the sum of the radial thickness dimensions of the water-lubricated bearing shell 1, the first bushing 2, the second bushing 3, and the shock absorber 4.

[0052] Specifically, the size of the first spacing of the oval cavity 41 should not be too large so as not to affect the bearing capacity of the bearing. At the same time, this size should not be too small either. If it is too small, the deformation range and the ability of angular compensation will correspondingly decrease. It is advisable that its size is 1 / 2 to 3 / 4 of the total radial width size of the water-lubricated bearing 1. The specific size is not limited and can be selected according to actual needs.

[0053] Furthermore, the shock absorber 4 is arranged between the first bushing 2 and the second bushing 3. In order to improve the connection reliability of the three, the inner side wall and the outer wall surface of the shock absorber 4 are vulcanized and connected to the outer side wall of the first bushing 2 and the inner side wall of the second bushing 3 respectively.

[0054] In some embodiments, the water-lubricated bearing shell 1 is a non-metallic water-lubricated bearing shell.

[0055] Specifically, the bearing in the embodiments of the present invention is used in a water environment, and the bearing bush can be selected as a water-lubricated bearing bush 1 to improve the lubrication performance of the bearing bush, and a hydrophilic non-metallic material with better self-wetting performance can be preferably selected.

[0056] For example, the bearing bush adopts a hydrophilic-based super-slippery bearing bush, such as a polyether ether ketone bearing bush or a polytetrafluoroethylene bearing bush, to further improve the lubrication performance of the bearing bush.

[0057] In some embodiments, the inner side wall of the first bushing 2 is connected to the outer side wall of the water-lubricated bearing bush 1 by cold shrinking, which can reduce the installation difficulty, avoid damage to the water-lubricated bearing bush, and enhance the reliability of the connection.

[0058] In a second aspect, the present invention also provides a condensate pump, including: a pump shaft 5 and the water-lubricated bearing as described above.

[0059] The water-lubricated bearing is sleeved on the pump shaft.

[0060] Specifically, since the condensate pump adopts the water-lubricated bearing shown in the above embodiments, the specific structure of the water-lubricated bearing refers to the above embodiments. Since the condensate pump adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0061] In some embodiments, an annular gap is provided between the inner side wall of the water-lubricated bearing bush and the outer side wall of the main shaft 5, and the annular gap is used to fill with liquid to form a supporting liquid film.

[0062] Specifically, in a water environment, the annular gap between the inner side wall of the water-lubricated bearing bush and the outer side wall of the pump shaft 5 can achieve water lubrication through a pressure water film.

[0063] The condensate pump provided by the present invention not only has all the beneficial effects of the above water-lubricated bearing, but also has a compact structure, which not only meets the requirements of the design space, but also meets its vibration reduction and shock resistance requirements, greatly expanding the operating conditions of the condensate pump, and further improving the operating reliability of the condensate pump.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water-lubricated bearing, characterized in that, Comprising: A water-lubricated bearing bush, a first bushing, a second bushing and a vibration damping member; The water-lubricated bearing bush is used to be sleeved outside the pump shaft; The first bushing, the second bushing and the vibration damping member are all cylindrical. The inner side wall of the first bushing is connected to the outer side wall of the water-lubricated bearing bush. The outer side wall of the first bushing is connected to the inner side wall of the vibration damping member. The outer side wall of the vibration damping member is connected to the inner side wall of the second bushing. Wherein, the first bushing is used to be connected to the pump body; The vibration damping member is provided with a cavity, and the cavity has an initial state and a deformed state. When the vibration damping member is squeezed, the cavity can be switched from the initial state to the deformed state; Wherein, the vibration damping member is made of a high-damping non-metallic material. The cavity is oval and is arranged in a ring shape, and the cavity is coaxially arranged with the vibration damping member. The first bushing is a high-damping vibration damping bushing made of rubber; The distance between the cavity wall of the cavity close to the second bushing and the cavity wall close to the first bushing is a first distance. In the deformed state, the distance between the cavity wall of the cavity close to the second bushing and the cavity wall close to the first bushing is a second distance. Wherein, the first distance is greater than the second distance, and the size of the first distance is 1 / 2 to 3 / 4 of the sum of the radial thickness sizes of the water-lubricated bearing bush, the first bushing, the second bushing and the vibration damping member; 2. The water-lubricated bearing according to claim 1, characterized in that, The inner side wall and the outer wall surface of the vibration damping member are respectively vulcanized and connected to the outer side wall of the first bushing and the inner side wall of the second bushing; 3. The water-lubricated bearing according to claim 1, characterized in that, The water-lubricated bearing bush is a non-metallic water-lubricated bearing bush; 4. The water-lubricated bearing according to claim 1, characterized in that, The inner side wall of the first bushing is connected to the outer side wall of the water-lubricated bearing bush by cold shrinking; 5. A condensate pump, characterized in that, Comprising: A pump shaft and the water-lubricated bearing according to any one of claims 1 to 4; The water-lubricated bearing is sleeved on the pump shaft; 6. The condensate pump according to claim 5, characterized in that, An annular gap is provided between the inner side wall of the water-lubricated bearing bush and the outer side wall of the pump shaft, and the annular gap is used to be filled with liquid to form a supporting liquid film.

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