filter

Abstract

The utility model relates to filter technical field discloses a filter, solves the technical problem that the filtered medium collecting chamber is easy to fall into external pollutants, causes the filtered medium collecting chamber to be blocked. It includes: base, filter cartridge type filter element, cylindrical casing, the base has an outer peripheral wall and the inner peripheral wall in the outer peripheral wall, the port of outer peripheral wall is at the base surface and forms an outside interface, the port of inner peripheral wall is at the base surface and forms an inside interface, the inside of inner peripheral wall forms the filtered medium collecting chamber, the cylindrical casing is installed on the outside interface and is encased in the outside of filter cartridge type filter element, and the reserved gap between the cylindrical casing and filter cartridge type filter element of each other encasement forms the filtered medium flow channel that is communicated with the filtered medium collecting chamber, the entrance of filtered medium collecting chamber is installed with the anti -blocking filter screen that is installed first before the filter cartridge type filter element and cylindrical casing are installed to the base.

Description

Technical Field

[0001] This disclosure relates to the field of filtration technology, and more specifically to filters. Background Technology

[0002] A lubricating oil filtration device for a wind turbine gearbox lubrication and cooling system is known, comprising: at least one filter; wherein each filter includes: a base; a cartridge filter element; and a cylindrical shell; wherein the base has an outer peripheral wall and an inner peripheral wall located within the outer peripheral wall, the port of the outer peripheral wall forms an outer interface on the surface of the base, the port of the inner peripheral wall forms an inner interface on the surface of the base, a medium collection cavity to be filtered is formed in the base between the outer peripheral wall and the inner peripheral wall, and a filtered medium collection cavity is formed inside the inner peripheral wall; the cartridge filter element is installed on the inner interface, and the filtered medium output port of the cartridge filter element is connected to the filtered medium collection cavity through the inner interface; the cylindrical shell is installed on the outer interface and fitted onto the outside of the cartridge filter element, and the reserved gap between the fitted cylindrical shell and the cartridge filter element forms a medium guide channel connected to the medium collection cavity to be filtered.

[0003] The technical solution in patent document CN117823609A (Reference 1) improves upon the aforementioned lubricating oil filtration device by integrating a first annular filter structure (for coarse filtration) and a second annular filter structure (for fine filtration) into the cartridge filter element. One end of the first annular filter structure is connected to one end of the second annular filter structure via a control valve located at the end of the first annular filter structure and / or the end of the second annular filter structure. When the lubricating oil temperature is low, its viscosity is high, and its flow resistance is high. At this time, the control valve opens, and the lubricating oil filtration device automatically switches to the first annular filter structure, which has lower flow resistance, to ensure stable lubricating oil flow. Conversely, when the lubricating oil temperature is high, its viscosity decreases, and its flow resistance is low. The lubricating oil filtration device automatically switches to the second annular filter structure, which has higher filtration precision, thereby achieving more efficient lubricating oil purification while maintaining a stable filtration flow rate.

[0004] According to Reference 1, during the operation of the wind turbine gearbox lubrication and cooling system, the lubricating oil in the gearbox is pumped through a lubricating oil pump and a one-way valve (a one-way valve mechanism for the medium to be filtered) to the aforementioned lubricating oil filtration device for filtration. Then, the flow path is distributed by the lubricating oil flow direction control device (a temperature-controlled distribution mechanism for the filtered medium). The lubricating oil flow direction control device utilizes the viscosity-temperature characteristics of the lubricating oil (the characteristic that viscosity is negatively correlated with temperature) to adjust the ratio of the flow rate of lubricating oil flowing to the lubricating oil cooler to the flow rate bypassing the lubricating oil cooler, thereby precisely controlling the final temperature of the lubricating oil returning to the gearbox. For a detailed explanation of the principle and structure of the aforementioned lubricating oil flow direction control device, please refer to the pressure-following temperature control valve in patent document CN108591802A (Reference 2), which will not be elaborated upon here.

[0005] Currently, to improve system compactness, the applicant has redesigned the lubricating oil filtration device. The redesigned filtration device integrates not only a temperature control and distribution mechanism for the filtered medium flow path, but also a one-way valve mechanism for the medium to be filtered, located between the lubricating oil pump and the lubricating oil filtration device. For example... Figure 1 As shown, the improved filter device specifically includes three filters. The bottom (outlet) of the base of each filter is mounted on the same bottom valve block, which is equipped with a temperature control and distribution mechanism for the filtered medium flow path. In addition, the side (inlet) of the base of each filter is also mounted on the same side valve block, which is equipped with a one-way valve mechanism for the medium to be filtered corresponding to each filter.

[0006] However, the above-mentioned improved design is not perfect. Specifically: First, because the bottom valve block and the side valve block need to be manufactured separately, the structural complexity and manufacturing cost of the filter device are increased. Furthermore, the improved design still retains the long-standing problem that external contaminants (mainly debris generated during assembly) can easily fall into the filtered media collection chamber during filter assembly, causing blockage. This problem has traditionally been categorized as an operational procedure issue rather than an engineering problem requiring technological innovation; therefore, a dedicated technical solution is lacking, and current solutions mainly rely on requiring workers to strictly adhere to operating procedures during assembly. Utility Model Content

[0007] The purpose of this utility model is to provide a filter that solves the technical problem in the background art where, during the filter assembly process, external pollutants easily fall into the filter media collection chamber, causing blockage of the filter media collection chamber.

[0008] A filter includes: a base; a cartridge filter element; and a cylindrical shell; wherein the base has an outer peripheral wall and an inner peripheral wall located within the outer peripheral wall, the port of the outer peripheral wall forms an outer interface on the surface of the base, and the port of the inner peripheral wall forms an inner interface on the surface of the base; a media collection chamber to be filtered is formed in the base between the outer peripheral wall and the inner peripheral wall, and a media collection chamber already filtered is formed inside the inner peripheral wall; the cartridge filter element is installed on the inner interface, and the media outlet of the cartridge filter element is connected to the media collection chamber already filtered through the inner interface; the cylindrical shell is installed on the outer interface and fitted onto the outside of the cartridge filter element, and the reserved gap between the fitted cylindrical shell and the cartridge filter element forms a media guide channel connected to the media collection chamber already filtered; an anti-clogging filter screen, which is installed before the cartridge filter element and the cylindrical shell are installed on the base, is installed at the inlet of the media collection chamber already filtered.

[0009] By installing an anti-clogging filter at the inlet of the filtered media collection chamber and adopting preventative protection measures by installing the anti-clogging filter before installing the cartridge filter element and cylindrical shell onto the base, the technical problem of external contaminants easily falling into the filtered media collection chamber during filter assembly is effectively solved. This fundamentally avoids clogging of the filtered media collection chamber caused by the intrusion of external contaminants. The pre-installation design of the anti-clogging filter ensures that the filtered media collection chamber is always protected during the subsequent installation of the cartridge filter element and cylindrical shell, significantly improving the cleanliness and reliability of the filter assembly process. This technical solution does not rely on manual operation procedures and achieves technical control of the contamination risk during the assembly process through a structured protective design.

[0010] The present disclosure will now be further described in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages provided by the present disclosure will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice. Attached Figure Description

[0011] Figure 1 An external view of the improved filter device mentioned in the background art.

[0012] Figure 2 This is an external view of an embodiment of the filtering device disclosed herein.

[0013] Figure 3 for Figure 2 The diagram shows the assembly relationship of different filters in the filtration device.

[0014] Figure 4 for Figure 3 The main view of a certain filter in the program.

[0015] Figure 5for Figure 4 The left view of the filter shown.

[0016] Figure 6 for Figure 4 The filter shown is a cross-sectional view along line AA.

[0017] Figure 7 for Figure 6 A magnified view of a section at point B.

[0018] Figure 8 for Figure 7 Independent view of the central base.

[0019] Figure 9 This is an external view of a second embodiment of the filtering device disclosed herein.

[0020] Figure 10 for Figure 9 An external view of one of the bases in the filter device shown.

[0021] Figure 11 for Figure 10 The base shown is an external view from another angle.

[0022] Figure 12 for Figure 9 Sectional view along the CC direction.

[0023] Figure 13 for Figure 9 A partial cross-sectional view of one of the filters in the filtration device shown.

[0024] Figure 14 for Figure 9 A magnified view of a portion of point D in the filter device shown.

[0025] Figure 15 for Figure 9 An external view of the anti-clogging filter screen in one of the filters in the filtration device shown.

[0026] The components in the diagram are labeled as follows: filter 10, base 11, outer peripheral wall 111, outer interface 111a, inner peripheral wall 112, inner interface 112a, first axial limiting structure 112b, boss 112c, media collection chamber to be filtered 113, filtered media collection chamber 114, temperature control distribution system including temperature control valve group 115, valve sleeve 1151, valve sleeve side opening 1151a, annular groove 1151b, valve core 1152, valve core side opening 1152a, valve cap 1152b, elastic pre-tightening device 1153, retractable support guide member 1153a, and so on. Output channel 116, second output channel 117, temperature control valve assembly mounting channel closed end cap 118, filtered medium check valve mechanism 119, bracket 1191, docking structure 120, side straight hole 121, plug 122, medium to be filtered input channel 123, pressure equalization channel 124, first medium to be filtered check valve structure 125a, second medium to be filtered check valve structure 125b, cartridge filter element 12, cylindrical shell 13, anti-clogging filter screen 14, flange 141, cutting groove 142, safety valve 15, bottom valve block 20, side valve block 30.

[0027] It should be noted that if any of the above reference numerals are not present in a particular figure, please refer to the corresponding reference numerals in other figures. The same reference numerals refer to the same object. Detailed Implementation

[0028] The present disclosure will now be clearly and completely described in conjunction with the accompanying drawings. Those skilled in the art will be able to implement the present disclosure based on these descriptions. Before describing the present disclosure in conjunction with the accompanying drawings, it should be particularly noted that:

[0029] The technical solutions and features provided in the various sections, including the following description, can be combined with each other without conflict. Furthermore, where possible, these technical solutions, features, and related combinations can be given specific technical subject matter and protected by relevant patents.

[0030] The embodiments described below are generally only some embodiments and not all embodiments. All other embodiments obtained by those skilled in the art based on these embodiments without inventive effort should fall within the scope of patent protection.

[0031] The terms "comprising," "including," "having," and any variations thereof in this specification, the corresponding claims, and related sections are intended to cover non-exclusive inclusion. Other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0032] Figure 1An external view of the improved filter device mentioned in the background section. (See image.) Figure 1 As shown, the improved filter device specifically includes three filters 10. The bottom (outlet) of the base 11 of each filter 10 is respectively mounted on the same bottom valve block 20. The bottom valve block 20 is provided with a temperature control and distribution mechanism for the filtered medium flow path. In addition, the side (inlet) of the base 11 of each filter 10 is also respectively mounted on the same side valve block 30. The side valve block 30 is provided with a one-way valve mechanism for the medium to be filtered that corresponds to each filter 10.

[0033] Because the bottom valve block and side valve block need to be manufactured separately, the structural complexity and manufacturing cost of the filter device are increased. Specifically: First, from a manufacturing cost perspective, the bottom valve block 20 and the side valve block 30 require independent material procurement, machining, heat treatment, and surface treatment processes, resulting in a significant increase in manufacturing costs. Second, from a structural complexity perspective, connection interfaces are required between the bottom valve block 20 and the base 11, and between the side valve block 30 and the base 11, increasing the complexity of the overall assembly. Third, from a sealing reliability perspective, the assembly interfaces between the bottom valve block 20 and the base 11, and between the side valve block 30 and the base 11, both constitute potential leakage points. Especially under high-pressure conditions, the probability of seal failure increases significantly, seriously affecting the long-term reliability of the system. Fourth, the space utilization is inefficient. The independent installation of the bottom valve block 20 and the side valve block 30 occupies a large amount of installation space, which is not compact enough in the space-constrained environment of a wind turbine nacelle.

[0034] Figure 2 This is an external view of an embodiment of the filtering device disclosed herein. Figure 3 for Figure 2 The diagram shows the assembly relationship of different filters in the filtration device. Figure 4 for Figure 3 The main view of a certain filter in the program. Figure 5 for Figure 4 The left view of the filter shown. Figure 6 for Figure 4 The filter shown is a cross-sectional view along line AA. Figure 7 for Figure 6 A magnified view of a section at point B. Figure 8 for Figure 7 Independent view of the central base.

[0035] like Figures 2 to 8As shown, the filtration device of Embodiment 1 is used to filter a viscous-temperature medium whose viscosity changes inversely with temperature. The viscous-temperature medium is the medium to be filtered before filtration and the viscous-temperature medium is the filtered medium after filtration. It includes at least one filter 10. The filter 10 includes a base 11, a cartridge filter element 12, and a cylindrical shell 13.

[0036] The base 11 has an outer peripheral wall 111 and an inner peripheral wall 112 located in the outer peripheral wall 111. The port of the outer peripheral wall 111 forms an outer interface 111a on the surface of the base 11, and the port of the inner peripheral wall 112 forms an inner interface 112a on the surface of the base 11. A medium collection cavity 113 to be filtered is formed in the base 11 between the outer peripheral wall 111 and the inner peripheral wall 112, and a medium collection cavity 114 of filtered media is formed inside the inner peripheral wall 112.

[0037] The cartridge filter element 12 is installed on the inner interface 112a, and the filtered medium outlet of the cartridge filter element 12 is connected to the filtered medium collection chamber 114 through the inner interface 112a. The cylindrical housing 13 is installed on the outer interface 111a and fitted onto the outside of the cartridge filter element 12. The reserved gap between the fitted cylindrical housing 13 and the cartridge filter element 12 forms a medium flow channel that is connected to the medium collection chamber 113.

[0038] The cartridge filter element 12 can directly adopt the cartridge filter element provided in Reference 1, which integrates the first annular filter structure (for coarse filtration) and the second annular filter structure (for fine filtration). Since this cartridge filter element has been described in detail in Reference 1, it will not be repeated here.

[0039] The base 11 is provided with a filtered medium flow path temperature control distribution mechanism. The filtered medium flow path temperature control distribution mechanism uses a temperature control valve group 115 to distribute the filtered medium that has passed through the filtered medium collection chamber 114 into the first output channel 116 and the second output channel 117 for output respectively. The ratio of the flow rate of the filtered medium output through the first output channel 116 to the flow rate of the filtered medium output through the second output channel 117 is positively correlated with the temperature of the filtered medium.

[0040] Specifically, the temperature control valve assembly 115 is installed in the filtered medium collection chamber 114 and includes a valve sleeve 1151, a valve core 1152, and an elastic pre-tightening device 1153. The valve sleeve 1151 and the base 11 are an integral structure, or the valve sleeve 1151 and the base 11 are separate assembly structures. The valve sleeve 1151 has a valve sleeve side opening 1151a on its side wall, and the valve core 1152 is installed in the valve sleeve 1151 and has a valve core side opening 1152a on its side wall. Under the combined action of the first axial pressure applied to the valve core 1152 by the filtered medium passing through the filtered medium collection chamber 114 and the second axial pressure applied to the valve core 1152 by the elastic pre-tightening device 1153 in the opposite direction to the first axial pressure, the valve core 1152 can adaptively reciprocate along the axial direction of the valve sleeve 1151. When the valve core 1152 moves in the direction of the first axial pressure, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a increases; when the valve core 1152 moves in the direction of the second axial pressure, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a decreases.

[0041] The first output channel 116 is formed in the base 11 and the entrance of the first output channel 116 is arranged on the inner wall of the inner peripheral wall 112. The first output channel 116 is used to discharge the filtered medium that has passed through the filtered medium collection cavity 114 out of the base 11 through a flow path without passing through the conductive channel.

[0042] The second output channel 117 is formed in the base 11 and the inlet of the second output channel 117 is arranged on the inner wall of the inner peripheral wall 112. The second output channel 117 is used to discharge the filtered medium that has passed through the filtered medium collection cavity 114 out of the base 11 through the flow path of the conduction channel.

[0043] In Example 1, the viscous-temperature medium is lubricating oil from the gearbox of the wind turbine. Before filtration, the lubricating oil is the lubricating oil to be filtered, and after filtration, it is the filtered lubricating oil.

[0044] Based on this, the temperature control valve assembly 115 is designed such that: when the temperature of the filtered lubricating oil is less than or equal to a first set threshold (e.g., 45°C), the viscosity of the filtered lubricating oil is high enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized (e.g., the valve core side opening 1152a and the valve sleeve side opening 1151a completely overlap); when the temperature of the filtered lubricating oil is greater than or equal to a second set threshold (e.g., 60°C), the viscosity of the filtered lubricating oil is low enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized; when the temperature of the filtered lubricating oil is greater than or equal to a second set threshold (e.g., 60°C), the viscosity of the filtered lubricating oil is low enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized. The core 1152 moves along the direction of the second axial pressure until the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is minimized (e.g., the valve core side opening 1152a and the valve sleeve side opening 1151a are completely misaligned, i.e., there is no conductive connection between the valve core side opening 1152a and the valve sleeve side opening 1151a). When the temperature of the filtered lubricating oil is between the first set threshold and the second set threshold, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a decreases as the temperature of the filtered lubricating oil increases.

[0045] refer to Figure 7 The valve core 1152 typically has a sidewall portion and an axially stressed portion. The valve core side opening 1152a is located on the sidewall portion, and the axially stressed portion is used to transmit a first axial pressure from the filtered medium and a second axial pressure from the elastic preload device 1153 to the sidewall portion. The elastic preload device 1153 is typically a spring, which can act on the axially stressed portion in various possible forms.

[0046] refer to Figure 7 In a preferred embodiment, the sidewall portion of the valve core 1152 is formed by a cylindrical body (allowing the entry of filtered media), within which a valve cap 1152b is installed, thus serving as the axial force-bearing portion. A spring is installed in the valve cap 1152b, with one end of the spring abutting against the valve cap 1152b and the other end abutting against the end member of the temperature control valve assembly 115 (e.g., the temperature control valve assembly mounting channel closure end cap 118 described below). The end member serves to provide a fixed support reference for the elastic preload device 1153 and is typically fixed to the valve sleeve 1151.

[0047] In addition, a retractable support guide member 1153a (e.g., a retractable support guide member including an outer sleeve and an inner guide rod) is installed inside the spring of the elastic pretensioning device 1153. One end of the spring presses against the valve cap 1152b through the telescopic end of the retractable support guide member 1153a, and the other end of the spring presses against the end member of the temperature control valve assembly 115 through the fixed end of the retractable support guide member 1153a.

[0048] The main function of the retractable support guide member 1153a is to ensure that the valve core 1152 can achieve precise axial linear movement under the combined action of the first axial pressure and the second axial pressure, and to prevent the valve core 1152 from radially offset or tilting during axial movement. At the same time, it provides internal support and guidance for the spring of the elastic preload device 1153, and avoids lateral deformation, instability or eccentric load of the spring during compression and extension cycles. It ensures that the spring can always act uniformly on the valve cap 1152b along the axial direction, thereby ensuring that the change in the conduction channel area between the valve core side opening 1152a and the valve sleeve side opening 1151a can accurately respond to the viscosity change caused by the temperature change of the filtered lubricating oil.

[0049] In Embodiment 1, the base 11 itself is a single machined component, preferably manufactured from a single cast component. A single machined component means that the outer peripheral wall 111, inner peripheral wall 112, and various channels of the base 11 are all manufactured on a single blank, rather than a structure composed of multiple independent parts connected by bolts or other assembly methods. This integrated design avoids the fitting gaps, assembly stresses, and potential leakage points caused by assembling multiple components, ensuring the integrity, sealing, and dimensional accuracy consistency of the base 11 structure.

[0050] "Made by a casting" means: formed entirely by casting process; or, using casting process to first obtain a near-net-shape blank of base 11, and then machining on this casting blank to achieve the final dimensional accuracy and surface quality requirements.

[0051] In one alternative embodiment, a casting blank containing the basic outline and main structural features of the base 11 can first be prepared by sand casting, precision casting, or other casting processes. This casting blank already has the approximate shape of the outer peripheral wall 111, the inner peripheral wall 112, and the rough outline of each channel. Subsequently, the casting blank is subjected to precision machining such as turning, boring, milling, and drilling to obtain various functional structural features such as the precise inner interface 112a, the outer interface 111a, the first output channel 116, and the second output channel 117, and to achieve the dimensional tolerances, surface roughness, and geometric accuracy required by the design.

[0052] When the valve sleeve 1151 and the base 11 are an integral structure, it means that the valve sleeve 1151 is formed simultaneously during the casting or machining process of the base 11. In this case, the structural features of the valve sleeve 1151, such as the inner cavity, side wall, and valve sleeve side opening 1151a, can all be formed directly inside the inner peripheral wall 112 by machining processes such as boring, drilling, and milling on the blank of the base 11, without the need for separate manufacturing of the valve sleeve 1151 and the assembly operation of the valve sleeve 1151.

[0053] When the valve sleeve 1151 and the base 11 are separate assembly structures, the valve sleeve 1151 is manufactured as an independent part, with complete outer contour, inner cavity, valve sleeve side opening 1151a, annular groove 1151b (not mandatory), shoulder and other structural features. Then, it is installed into the predetermined position in the filtered media collection cavity 114 of the base 11 by insertion (such as press fitting or threaded connection). The advantage of this separate assembly structure is that the material selection and manufacturing process of the valve sleeve 1151 and the base 11 can be optimized separately, which is convenient for mass production and quality control, and also facilitates the individual replacement and maintenance of the valve sleeve 1151.

[0054] In one alternative embodiment, the filtered medium collection chamber 114 extends along the direction of the first axial pressure to the surface of the base 11, forming a temperature control valve assembly installation channel, through which the temperature control valve assembly 115 is inserted for installation.

[0055] Insertion installation refers to an assembly method in which the thermostatic valve assembly is inserted (the insertion method is not limited) from the open end of the base 11 into the predetermined installation position within the filtered media collection chamber 114 along the axial direction of the installation channel. The significant advantages of this insertion installation method are its ease of operation, high assembly efficiency, and precise positioning, while also facilitating subsequent maintenance and component replacement. When it is necessary to repair or replace the thermostatic valve assembly 115, the entire thermostatic valve assembly 115 can be removed from the installation channel along the original path without any destructive disassembly of the base 11, greatly improving the maintainability and repair efficiency of the equipment.

[0056] When the valve sleeve 1151 and the base 11 are separate assembly structures, the inner wall of the inner peripheral wall 112 is also provided with a first axial limiting structure 112b for axial positioning and engagement with the shoulder of the valve sleeve 1151. When the temperature control valve assembly 115 is installed into the base 11 through the temperature control valve assembly installation channel, the shoulder of the valve sleeve 1151 is axially positioned and engaged by the first axial limiting structure 112b.

[0057] In addition, a thermostatic valve assembly mounting channel sealing end cap 118 is detachably installed on the surface of the base 11. When the thermostatic valve assembly 115 is installed into the base 11 through the thermostatic valve assembly mounting channel, the thermostatic valve assembly mounting channel sealing end cap 118 can seal the thermostatic valve assembly mounting channel and axially press the fixing part of the thermostatic valve assembly 115 into the base 11.

[0058] The first axial limiting structure 112b and the closed end cap 118 of the temperature control valve assembly mounting channel together constitute the bidirectional axial constraint of the temperature control valve assembly 115. First, the first axial limiting structure 112b provides a precise axial positioning reference and supporting reaction force for the shoulder of the valve sleeve 1151, while the closed end cap 118 of the temperature control valve assembly mounting channel applies an axial pressing force to the fixed part of the temperature control valve assembly 115, so that the temperature control valve assembly 115 forms a stable axial constraint state between the first axial limiting structure 112b and the closed end cap 118 of the temperature control valve assembly mounting channel, ensuring that the installation position of the temperature control valve assembly 115 in the filtered media collection chamber 114 is accurate and reliably fixed.

[0059] Secondly, this bidirectional constraint mechanism effectively prevents the temperature control valve assembly 115 from undergoing axial displacement or loosening under the repeated action of the first axial pressure and the second axial pressure, ensuring that the relative positional relationship between the valve sleeve side opening 1151a, the valve core side opening 1152a and the inlet of the second output channel 117 always maintains the design requirements, thereby ensuring accurate control of the conduction channel area and reliable operation of the temperature control valve assembly 115.

[0060] Furthermore, the detachable design of the closed end cap 118 of the temperature control valve assembly mounting channel, in conjunction with the positioning function of the first axial limiting structure 112b, enables convenient maintenance of the temperature control valve assembly 115. When it is necessary to repair or replace the temperature control valve assembly 115, simply remove the closed end cap 118 of the temperature control valve assembly mounting channel to release the axial pressing constraint. The axial positioning fit between the shoulder of the valve sleeve 1151 and the first axial limiting structure 112b will then be released, and the entire temperature control valve assembly 115 can be smoothly removed along the installation channel of the temperature control valve assembly 115.

[0061] Finally, the sealing end cap 118 of the temperature control valve assembly installation channel also ensures the effective sealing of the temperature control valve assembly installation channel, preventing the filtered medium from leaking from the temperature control valve assembly installation channel, and maintaining the pressure stability and system sealing in the filtered medium collection chamber 114.

[0062] Furthermore, a one-way valve mechanism 119 for filtered media is provided between the inlet of the filtered media collection chamber 114 and the temperature control valve assembly 115. The one-way valve mechanism 119 is used to unidirectionally supply filtered media into the filtered media collection chamber 114. The one-way valve mechanism 119 for filtered media has also been disclosed in Reference 1, and will not be described in detail here.

[0063] However, in Embodiment 1, the filtered medium check valve mechanism 119 includes a bracket 1191 mounted on the inner wall of the inner peripheral wall 112 for mounting the valve disc of the filtered medium check valve mechanism 119. The bracket 1191 is designed to allow the filtered medium to flow through. The relative position between the bracket 1191 and the temperature control valve assembly 115 is set such that: a) the valve core 1152 can move in the direction of the second axial pressure to achieve the minimum conduction area of ​​the designed conduction channel, and b) the valve core 1152 is prevented from moving in the direction of the second axial pressure and dislodging from the valve sleeve 1151.

[0064] As can be seen, in Embodiment 1, in addition to fulfilling the basic function of unidirectionally conveying the filtered medium to the filtered medium collection chamber 114, the bracket 1191 of the filtered medium check valve mechanism 119 also plays a key limiting and protection role for the temperature control valve group 115. The bracket 1191 allows the valve core 1152 to move fully along the second axial pressure direction within the normal working range to achieve a complete adjustment range of the conduction channel area from the maximum value to the design minimum value, ensuring that the flow distribution function of the temperature control valve group 115 works normally. At the same time, it also serves as a mechanical limiting block for the valve core 1152, preventing the valve core 1152 from moving excessively and coming off the valve sleeve 1151 due to excessive second axial pressure, thereby avoiding functional failure and component loss of the temperature control valve group 115. This design simplifies the structure, saves space, and improves the reliability of the filtered medium flow path temperature control distribution mechanism.

[0065] Furthermore, when the valve sleeve 1151 and the base 11 are assembled separately, an annular groove 1151b is formed on the outer cylindrical surface of the side wall of the valve sleeve 1151 that mates with the inner wall of the inner peripheral wall 112. The arrangement position of the valve sleeve side opening 1151a on the side wall of the valve sleeve 1151 corresponds to the bottom portion of the annular groove 1151b. The inlet of the second output channel 117 is arranged on the inner wall of the inner peripheral wall 112, and the arrangement position of the inlet of the second output channel 117 on the inner wall of the inner peripheral wall 112 corresponds to the bottom portion of the annular groove 1151b.

[0066] The annular groove 1151b serves as an intermediate connecting chamber between the valve sleeve side opening 1151a and the inlet of the second output channel 117, ensuring that the filtered medium can flow smoothly from the inside of the valve sleeve 1151 to the second output channel 117. Even if the valve sleeve 1151 experiences a slight circumferential rotational deviation during assembly, the continuous annular structure of the annular groove 1151b can still ensure reliable flow path connectivity, greatly reducing assembly accuracy requirements and improving assembly fault tolerance.

[0067] Generally speaking, if the direction of the central axis of the inner peripheral wall 112 is taken as the height direction, the arrangement height of the inlet of the first output channel 116 is located between the arrangement height of the inlet of the filtered medium collection cavity 114 and the arrangement height of the inlet of the second output channel 117.

[0068] In this way, it can meet the working needs of the temperature control valve assembly 115, ensuring that there is sufficient filtered lubricating oil flowing through the temperature control valve assembly 115 to generate effective viscous resistance to achieve temperature response regulation, while avoiding flow competition between the first output channel 116 and the valve sleeve side opening 1151a area, which would interfere with the independent regulation function of the temperature control valve assembly 115.

[0069] In addition, the base 11 has docking structures 120 on both sides of the outer peripheral wall 111. When one of the docking structures 120 docks with the corresponding docking structure 120 on another adjacent base 11, the base 11 can be connected to the other adjacent base 11.

[0070] Based on the direct integration of the filtered media flow path temperature control distribution mechanism into the base 11 and the elimination of the independent configuration between the base and the bottom valve block, docking structures 120 are respectively set on both sides of the outer peripheral wall 111 of the base 11, so that adjacent bases 11 can be reliably connected through the docking of the corresponding docking structures 120. Multiple bases 11 can be modularly combined, and the number of filters can be flexibly expanded according to the amount of filtered media to be processed in different application scenarios.

[0071] The mating structure 120 can usually be in the form of a flange, and adjacent mating structures 120 (flanges) are connected by bolts.

[0072] Furthermore, the designated docking structure 120 is provided with a first outlet and a second outlet, respectively. The first outlet extends from the first output channel 116, and the second outlet extends from the second output channel 117. When one of the designated docking structures 120 docks with a corresponding docking structure 120 on another adjacent base 11, the first outlet of this docking structure 120 is connected to the first outlet of the corresponding docking structure 120 on the other adjacent base 11, and the second outlet of this docking structure 120 is connected to the second outlet of the corresponding docking structure 120 on the other adjacent base 11.

[0073] "Designated docking structure 120" refers to a docking structure 120 specifically designated among the docking structures 120 located on both sides of the outer peripheral wall 111 on the base 11, which has the function of outputting filtered media (the docking structures 120 on the base 11 can all be "designated docking structures 120", or only some can be "designated docking structures 120"). This designated docking structure 120 not only has the function of mechanically connecting with adjacent bases 11, but also has a first outlet formed by extending from the first output channel 116 and a second outlet formed by extending from the second output channel 117, so that it can simultaneously undertake the functions of outputting and transmitting filtered media. When multiple bases 11 are connected through the designated docking structure 120, the first output channel 116 and the second output channel 117 of each base 11 can be connected and converged to form a unified first and second filtered media output, thereby achieving the coordinated work of multiple temperature control distributions and flow superposition while maintaining the independent temperature control distribution function of each temperature control valve group 115.

[0074] In a preferred embodiment, the first output channel 116 has a first straight hole portion, and a first outlet extends from the first straight hole portion; the second output channel 117 has a second straight hole portion, and a second outlet extends from the second straight hole portion. Furthermore, if the first straight hole portion passes through the filtered medium collection cavity 114, thus directly forming the entrance of the first output channel 116 on the inner wall of the inner peripheral wall 112, then the first output channel 116 is constituted by the first straight hole portion; alternatively, if the first straight hole portion is located outside the filtered medium collection cavity 114, and a lateral straight hole 121 is also provided on the base 11 from the side of the outer peripheral wall 111 to connect the first straight hole portion with the filtered medium collection cavity 114, and the lateral straight hole forms the entrance of the first output channel 116 on the inner wall of the inner peripheral wall 112, then the first output channel 116 is constituted by the first straight hole portion and the lateral straight hole, and a plug 122 for engaging with the lateral straight hole is detachably installed on the base 11. Furthermore, the second straight hole passes through the filtered media collection cavity 114, thus directly forming the inlet of the second output channel 117 on the inner wall of the inner peripheral wall 112. Therefore, the second output channel 117 is constituted by the second straight hole. Simultaneously, if the direction of the central axis of the inner peripheral wall 112 is taken as the height direction, the arrangement height of the inlet of the first output channel 116 is located between the arrangement height of the inlet of the filtered media collection cavity 114 and the arrangement height of the inlet of the second output channel 117.

[0075] By designing the first output channel 116 and the second output channel 117 to have a first straight hole and a second straight hole respectively, and extending from the corresponding straight hole to form a first outlet and a second outlet, a straight-through design of the first output channel 116 and the second output channel 117 is realized, thereby facilitating manufacturing.

[0076] With the inlet height of the first output channel 116 positioned between the inlet height of the filtered media collection cavity 114 and the inlet height of the second output channel 117, when the first straight hole passes through the filtered media collection cavity 114, the inlet of the first output channel 116 can be directly formed on the inner wall of the inner peripheral wall 112 through the first straight hole, thus achieving the simplest channel structure for the first output channel 116. When the first straight hole is located outside the filtered media collection cavity 114, it is connected to the filtered media collection cavity 114 through the lateral straight hole 121, forming the inlet of the first output channel 116 on the inner wall of the inner peripheral wall 112. Combined with the detachable plug 122, this ensures precise positioning of the inlet of the first output channel 116 at the layer height, providing flexibility for the processing, manufacturing, maintenance, and repair of the base 11.

[0077] The second straight hole passes through the filtered medium collection cavity 114 and directly forms the entrance of the second output channel 117 on the inner wall of the inner peripheral wall 112, realizing the most simplified channel structure of the second output channel 117.

[0078] Since the base 11 typically has a filter media input channel 123 on the side of the outer peripheral wall 111 for inputting the filter media into the filter media collection cavity 113, the first output channel 116 and the filter media input channel can be located on both sides of the second output channel 117.

[0079] Since the second straight hole of the second output channel 117 needs to pass through the filtered medium collection cavity 114, its position is relatively fixed and centrally arranged, while the first straight hole of the first output channel 116 can be located outside the filtered medium collection cavity 114 and the filterable medium input channel 123 is located on the side of the outer peripheral wall 111, the first output channel 116 and the filterable medium input channel 123 can be located on both sides of the second output channel 117, so as to achieve reasonable utilization of the space of the internal channel of the base 11.

[0080] In a preferred embodiment, the docking structures 120 on the base 11 located on both sides of the outer peripheral wall 111 are arranged symmetrically on the left and right sides of the central axis of the outer peripheral wall 111. The filter medium input channel is located on the front side of the outer peripheral wall 111, and the lateral straight hole is located on the rear side of the outer peripheral wall 111.

[0081] In one optional embodiment, the docking structure 120 is further provided with a third outlet, and the base 11 is provided with a pressure equalization channel 124 that connects the third outlet of the base 11 to the filter medium collection chamber 113 in the base 11 (see reference). Figures 10-11When one of the designated docking structures 120 docks with the corresponding docking structure 120 on another adjacent base 11, the third outlet of the designated docking structure 120 is connected to the third outlet of the corresponding docking structure 120 on the other adjacent base 11.

[0082] By opening a third outlet on the set docking structure 120 and cooperating with the pressure equalization channel 124 to connect the third outlet of the base 11 with the filter medium collection cavity 113, a pressure equalization system is realized in which multiple adjacent bases 11 are connected through the third outlet to form the filter medium collection cavity 113.

[0083] When the first output channel 116 has a first straight hole and the second output channel 117 has a second straight hole, the pressure equalization channel 124 is opened between the first straight hole and the second straight hole.

[0084] When the pressure equalization channel 124 is opened between the first straight hole and the second straight hole, the first straight hole can be located outside the filtered medium collection cavity 114 (the first straight hole is connected to the filtered medium collection cavity 114 through the lateral straight hole 121 without passing through the filtered medium collection cavity 114), thereby providing sufficient arrangement space for the pressure equalization channel 124.

[0085] In Embodiment 1, the one-way valve mechanism for the medium to be filtered is set in an independent side valve block 30. The side valve block 30 is installed on the side of the base 11 and is used to unidirectionally deliver the medium to be filtered into the medium collection chamber 113 (through the medium input channel 123).

[0086] Furthermore, an anti-clogging filter 14 is installed at the inlet of the filtered media collection chamber 114, which is installed before the cartridge filter element 12 and the cylindrical housing 13 are installed onto the base 11. The anti-clogging filter 14 is detachably installed on the end face of the port of the inner peripheral wall 112. For the specific structure of the anti-clogging filter 14, please refer to the relevant description in Embodiment 2.

[0087] In Embodiment 1, by directly integrating the filtered media flow path temperature control distribution mechanism into the base 11, and by opening both the first output channel 116 and the second output channel 117 in the base 11, the independent configuration between the base 11 and the bottom valve block is eliminated, thereby significantly simplifying the overall structure of the filter, reducing manufacturing costs, and eliminating the assembly interface between the base 11 and the bottom valve block, reducing potential leakage points and improving system reliability. The temperature control valve assembly 115 is installed in the filtered media collection chamber 114, and can accurately adjust the area of ​​the conduction channel between the valve core side opening and the valve sleeve side opening according to the temperature change of the filtered media through the adaptive reciprocating motion of the valve core under the combined action of the first axial pressure and the second axial pressure. This makes the ratio of the filtered media flow rate output through the first output channel 116 to the filtered media flow rate output through the second output channel 117 positively correlated with the filtered media temperature, thus achieving precise temperature control distribution of viscous and warm media.

[0088] Figure 9 This is an external view of a second embodiment of the filtering device disclosed herein. Figure 10 for Figure 9 An external view of one of the bases in the filter device shown. Figure 11 for Figure 10 The base shown is an external view from another angle. Figure 12 for Figure 9 Sectional view along the CC direction. Figure 13 for Figure 9 A partial cross-sectional view of one of the filters in the filtration device shown. Figure 14 for Figure 9 A magnified view of point D in the filter device shown. Figure 15 for Figure 9 An external view of the anti-clogging filter screen in one of the filters in the filtration device shown.

[0089] like Figures 9 to 15 As shown, the filtration device of Embodiment 2 is used to filter a viscous-temperature medium whose viscosity changes inversely with temperature. The viscous-temperature medium is the medium to be filtered before filtration and the viscous-temperature medium is the filtered medium after filtration. It includes at least one filter 10. The filter 10 includes a base 11, a cartridge filter element 12, and a cylindrical shell 13.

[0090] The base 11 has an outer peripheral wall 111 and an inner peripheral wall 112 located in the outer peripheral wall 111. The port of the outer peripheral wall 111 forms an outer interface 111a on the surface of the base 11, and the port of the inner peripheral wall 112 forms an inner interface 112a on the surface of the base 11. A medium collection cavity 113 to be filtered is formed in the base 11 between the outer peripheral wall 111 and the inner peripheral wall 112, and a medium collection cavity 114 of filtered media is formed inside the inner peripheral wall 112.

[0091] The cartridge filter element 12 is installed on the inner interface 112a, and the filtered medium outlet of the cartridge filter element 12 is connected to the filtered medium collection chamber 114 through the inner interface 112a. The cylindrical housing 13 is installed on the outer interface 111a and fitted onto the outside of the cartridge filter element 12. The reserved gap between the fitted cylindrical housing 13 and the cartridge filter element 12 forms a medium flow channel that is connected to the medium collection chamber 113.

[0092] The filtration device also includes at least one integrated valve control device, which comprises a valve seat, a one-way valve mechanism for the medium to be filtered, and a temperature control and distribution mechanism for the flow path of the filtered medium. The valve seat is formed by the base 11 itself and has an integrally machined first part and a second part.

[0093] The one-way valve mechanism for the medium to be filtered is located in the first part, and is used to unidirectionally deliver the medium to be filtered into the medium collection chamber 113.

[0094] The filtered medium flow path temperature control distribution mechanism is located in the second part. The filtered medium flow path temperature control distribution mechanism uses the temperature control valve group 115 to distribute the filtered medium that passes through the filtered medium collection chamber 114 into the first output channel 116 and the second output channel 117 for output respectively, and the ratio of the flow rate of the filtered medium output through the first output channel 116 to the flow rate of the filtered medium output through the second output channel 117 is positively correlated with the temperature of the filtered medium.

[0095] The filter medium check valve mechanism includes a first filter medium check valve structure 125a and a second filter medium check valve structure 125b, which are arranged in parallel in the first part and operate independently. The first part includes a first setting station and a second setting station. The first setting station is used to set the first filter medium check valve structure 125a, and the second setting station is used to set the second filter medium check valve structure 125b.

[0096] The aforementioned base 11 is itself a single-piece machined part, preferably made by casting.

[0097] The temperature control valve assembly 115 is installed in the filtered medium collection chamber 114 and includes a valve sleeve 1151, a valve core 1152, and an elastic pre-tightening device 1153. The valve sleeve 1151 and the base 11 are an integral structure, or the valve sleeve 1151 and the base 11 are separate assembly structures. The valve sleeve 1151 has a valve sleeve side opening 1151a on its side wall, and the valve core 1152 is installed in the valve sleeve 1151 and has a valve core side opening 1152a on its side wall.

[0098] The valve core 1152 can adaptively reciprocate along the axial direction of the valve sleeve 1151 under the combined action of a first axial pressure applied to the valve core 1152 by the filtered medium through the filtered medium collection chamber 114 and a second axial pressure applied to the valve core 1152 by the elastic preload device 1153 in the opposite direction to the first axial pressure. When the valve core 1152 moves in the direction of the first axial pressure, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a increases; when the valve core 1152 moves in the direction of the second axial pressure, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a decreases.

[0099] The first output channel 116 is formed in the base 11 and the entrance of the first output channel 116 is arranged on the inner wall of the inner peripheral wall 112. The first output channel 116 is used to discharge the filtered medium that has passed through the filtered medium collection cavity 114 out of the base 11 through a flow path without passing through the conductive channel.

[0100] The second output channel 117 is formed in the base 11 and the inlet of the second output channel 117 is arranged on the inner wall of the inner peripheral wall 112. The second output channel 117 is used to discharge the filtered medium that has passed through the filtered medium collection cavity 114 out of the base 11 through the flow path of the conduction channel.

[0101] In Example 2, the viscous-temperature medium is lubricating oil from the gearbox of the wind turbine. Before filtration, the lubricating oil is the lubricating oil to be filtered, and after filtration, it is the filtered lubricating oil.

[0102] Based on this, the temperature control valve assembly 115 is designed such that: when the temperature of the filtered lubricating oil is less than or equal to a first set threshold (e.g., 45°C), the viscosity of the filtered lubricating oil is high enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized (e.g., the valve core side opening 1152a and the valve sleeve side opening 1151a completely overlap); when the temperature of the filtered lubricating oil is greater than or equal to a second set threshold (e.g., 60°C), the viscosity of the filtered lubricating oil is low enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized; when the temperature of the filtered lubricating oil is greater than or equal to a second set threshold (e.g., 60°C), the viscosity of the filtered lubricating oil is low enough to allow the valve core 1152 to move along the direction of the first axial pressure until the area of ​​the conduction channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is maximized. The core 1152 moves along the direction of the second axial pressure until the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a is minimized (e.g., the valve core side opening 1152a and the valve sleeve side opening 1151a are completely misaligned, i.e., there is no conductive connection between the valve core side opening 1152a and the valve sleeve side opening 1151a). When the temperature of the filtered lubricating oil is between the first set threshold and the second set threshold, the area of ​​the conductive channel between the valve core side opening 1152a and the valve sleeve side opening 1151a decreases as the temperature of the filtered lubricating oil increases.

[0103] The filtered medium collection chamber 114 extends along the direction of the first axial pressure to the surface of the base 11, forming a temperature control valve assembly installation channel. The temperature control valve assembly 115 is inserted and installed through the temperature control valve assembly installation channel.

[0104] When the valve sleeve 1151 and the base 11 are separate assembly structures, the inner wall of the inner peripheral wall 112 is also provided with a first axial limiting structure 112b for axial positioning and engagement with the shoulder of the valve sleeve 1151. When the temperature control valve assembly 115 is installed into the base 11 through the temperature control valve assembly installation channel, the shoulder of the valve sleeve 1151 is axially positioned and engaged by the first axial limiting structure 112b.

[0105] A thermostatic valve assembly mounting channel sealing end cap 118 is detachably installed on the surface of the base 11. When the thermostatic valve assembly 115 is installed into the base 11 through the thermostatic valve assembly mounting channel, the thermostatic valve assembly mounting channel sealing end cap 118 can seal the thermostatic valve assembly mounting channel and axially press the fixing part of the thermostatic valve assembly 115 into the base 11.

[0106] A one-way valve mechanism 119 for filtered media is provided between the inlet of the filtered media collection chamber 114 and the temperature control valve group 115. The one-way valve mechanism 119 for filtered media is used to unidirectionally deliver filtered media into the filtered media collection chamber 114.

[0107] The filtered media check valve mechanism 119 includes a bracket 1191 mounted on the inner wall of the inner peripheral wall 112 for mounting the valve disc of the filtered media check valve mechanism 119. The bracket 1191 has a channel that allows the filtered media to flow through. The relative position between the bracket 1191 and the temperature control valve assembly 115 is configured to: a) allow the valve core 1152 to move in the direction of the second axial pressure to achieve the designed minimum conduction area of ​​the conduction channel, and b) prevent the valve core 1152 from moving in the direction of the second axial pressure and dislodging from the valve sleeve 1151.

[0108] When the valve sleeve 1151 and the base 11 are assembled separately, an annular groove 1151b is formed on the outer cylindrical surface of the side wall of the valve sleeve 1151 that mates with the inner wall of the inner peripheral wall 112. The position of the valve sleeve side opening 1151a on the side wall of the valve sleeve 1151 corresponds to the bottom of the annular groove 1151b. The inlet of the second output channel 117 is arranged on the inner wall of the inner peripheral wall 112, and the position of the inlet of the second output channel 117 on the inner wall of the inner peripheral wall 112 corresponds to the bottom of the annular groove 1151b.

[0109] If the direction of the central axis of the inner peripheral wall 112 is taken as the height direction, then the arrangement height of the inlet of the first output channel 116 is located between the arrangement height of the inlet of the filtered medium collection cavity 114 and the arrangement height of the inlet of the second output channel 117.

[0110] The filtration device includes at least two filters 10 arranged in parallel; in each filter 10, a docking structure 120 is respectively provided on both sides of the outer peripheral wall 111 of the base 11; between two adjacent filters 10, a docking structure 120 on the base 11 of one filter 10 docks with a corresponding docking structure 120 on the base 11 of the other adjacent filter 10, thereby connecting the bases 11 of the two filters 10 together.

[0111] Each filter 10 has a first outlet and a second outlet on its designated docking structure 120. The first outlet is formed by extending from the first output channel 116, and the second outlet is formed by extending from the second output channel 117. When one of the designated docking structures 120 docks with a corresponding docking structure 120 on another adjacent base 11, the first outlet of this docking structure 120 is connected to the first outlet of the corresponding docking structure 120 on the other adjacent base 11, and the second outlet of this docking structure 120 is connected to the second outlet of the corresponding docking structure 120 on the other adjacent base 11.

[0112] In each filter 10, the first output channel 116 has a first straight hole portion and a first outlet extends from the first straight hole portion, and the second output channel 117 has a second straight hole portion and a second outlet extends from the second straight hole portion.

[0113] In each filter 10, a first straight hole passes through the filtered medium collection cavity 114, thereby directly forming the inlet of the first output channel 116 on the inner wall of the inner peripheral wall 112. The first output channel 116 is formed by the first straight hole. Alternatively, the first straight hole is located outside the filtered medium collection cavity 114, and a lateral straight hole 121 is also opened on the base 11 from the side of the outer peripheral wall 111 to connect the first straight hole with the filtered medium collection cavity 114. The lateral straight hole 121 forms the inlet of the first output channel 116 on the inner wall of the inner peripheral wall 112. The first output channel 116 is formed by the first straight hole and the lateral straight hole 121. A plug 122 for cooperating with the lateral straight hole 121 is detachably installed on the base 11.

[0114] The second straight hole passes through the filtered medium collection cavity 114 and directly forms the entrance of the second output channel 117 on the inner wall of the inner peripheral wall 112. The second output channel 117 is composed of the second straight hole.

[0115] In each filter 10, the docking structures 120 on the base 11 located on both sides of the outer peripheral wall 111 are arranged symmetrically on the left and right sides of the central axis of the outer peripheral wall 111. The one-way valve mechanism of the medium to be filtered is located on the front side of the outer peripheral wall 111, and the lateral straight hole 121 is located on the rear side of the outer peripheral wall 111.

[0116] Each filter 10 has a third outlet on the designated docking structure 120, and a pressure equalization channel 124 is provided in the corresponding base 11 to connect the third outlet of the base 11 with the media collection chamber 113 to be filtered in the base 11; when a designated docking structure 120 docks with the corresponding docking structure 120 on another adjacent base 11, the third outlet of the designated docking structure 120 is connected to the third outlet of the corresponding docking structure 120 on the other adjacent base 11.

[0117] In each filter 10, when the first output channel 116 has a first straight hole and the second output channel 117 has a second straight hole, the equalizing channel 124 is opened between the first straight hole and the second straight hole.

[0118] Since the pressure equalization channel 124 ensures pressure balance in the media collection chamber 113 among the filters 10, when the filtration device includes at least two filters 10 arranged in parallel, a safety valve 15 can be installed on the base 11 of only one of the filters 10 (see [link]). Figure 14 The function of safety valve 15 is to release pressure when the pressure in the filter medium collection chamber 113 reaches the set pressure threshold.

[0119] The preferred installation position of the safety valve 15 is on the leftmost or rightmost docking structure 120 of the filter device. The valve chamber of the safety valve 15 is connected to the filter medium collection chamber 113 of the docking structure 120 through the safety valve drain hole on the docking structure 120. The safety valve drain hole can be directly utilized from the pressure equalization channel 124, or it can utilize a pre-formed blind hole originally reserved for machining the first output channel 116 or the second output channel 117 (this pre-formed blind hole is formed in the docking structure 120 during the casting of the base 11 but is not axially opened. If the blind hole is axially opened by machining, the first output channel 116 or the second output channel 117 is formed. If a radial hole is subsequently machined from the filter medium collection chamber 113, the safety valve drain hole is formed).

[0120] Installing the safety valve 15 on the leftmost or rightmost docking structure 120 of the filter unit has significant practical advantages. First, because the pressure equalization channel 124 ensures complete pressure balance among the media collection chambers 113 of all parallel filters 10, installing the safety valve 15 on the leftmost or rightmost docking structure 120 of the filter unit will not affect its pressure monitoring and protection effect on the entire filter unit; pressure changes at any location can be instantly transmitted to the safety valve 15 through the pressure equalization channel 124. Second, the leftmost or rightmost docking structure 120 of the filter unit provides more ample installation space, avoiding interference between the safety valve 15 and the intermediate filters 10, facilitating the installation, commissioning, maintenance, and replacement of the safety valve 15. Third, the processing of the safety valve's drain hole is more flexible; whether directly utilizing the existing pressure equalization channel 124 or using pre-formed blind holes to create a dedicated drain channel radially, it will not affect the normal function of the first output channel 116 or the second output channel 117 of the adjacent filters 10. In addition, the safety valve 15 is installed on the leftmost or rightmost docking structure 120 of the filter device, which takes advantage of the inherent structural features of the docking structure 120 to facilitate the installation of the safety valve 15.

[0121] In Embodiment 2, by setting an integrated valve control device, the one-way valve mechanism for the medium to be filtered and the temperature control distribution mechanism for the flow path of the filtered medium are integrated into the first and second parts of the valve seat, which are integrally formed. This eliminates the design of independent configuration between the bottom valve block and the side valve block, thereby significantly reducing manufacturing costs and simplifying the overall structure of the filter 10. The valve seat is formed by the base 11 itself, which greatly improves the compactness of the filter 10. The one-way valve mechanism for the medium to be filtered can effectively deliver the medium to be filtered in one direction to the medium collection chamber 113. The temperature control distribution mechanism for the flow path of the filtered medium uses the temperature control valve group 115 to precisely control the ratio of the flow rate of the filtered medium output through the first output channel 116 to the flow rate of the filtered medium output through the second output channel 117, which is positively correlated with the temperature of the filtered medium, thus realizing the organic unity of the one-way valve function and the temperature control distribution function.

[0122] As can be seen, both Embodiment 1 and Embodiment 2 include the same basic structural components. The key difference lies in the following: In Embodiment 1, the one-way valve mechanism for the medium to be filtered is located in a separate side valve block 30, which is installed on the side of the base 11, maintaining the independent configuration between the base 11 and the side valve block 30; while in Embodiment 2, by setting an integrated valve control device, the one-way valve mechanism for the medium to be filtered is directly integrated into the first part of the valve seat formed by the base 11 itself, and innovatively sets up a parallel independent working design for the first one-way valve structure 125a and the second one-way valve structure 125b for the medium to be filtered, completely eliminating the independent configuration of the side valve block 30, and realizing the complete integration of the one-way valve mechanism for the medium to be filtered and the temperature control and distribution mechanism for the filtered medium flow path in the same base 11. Thus, based on the elimination of the bottom valve block 20 in Embodiment 1, the side valve block 30 is further eliminated, achieving a higher degree of structural simplification, reduced manufacturing costs, and improved system compactness.

[0123] It should be particularly noted that the design of the filter medium check valve mechanism, which includes a first filter medium check valve structure 125a and a second filter medium check valve structure 125b arranged in parallel in the first part and operating independently, is significant for the following reasons: First, it decomposes the large check valve mechanism originally concentrated in the side valve block 30 into two relatively small independent check valve structures, reducing the size of each check valve structure and making it easier to arrange and design the space in the first part of the base 11. Simultaneously, the two independent units can be respectively set in the first and second setting positions, avoiding the concentrated occupation of space in the base 11 by the large check valve mechanism. Second, the two independent check valve structures can provide multiple filter medium input interfaces, allowing users to flexibly choose between single or dual interface modes according to different application scenarios and flow requirements, providing greater adaptability for the modular design and system expansion of the entire filtration device.

[0124] In addition, in Embodiment 2, an anti-clogging filter screen 14 is installed at the inlet of the filtered media collection chamber 114 before the cartridge filter element 12 and the cylindrical housing 13 are installed on the base 11.

[0125] To facilitate the installation of the anti-clogging filter 14, the anti-clogging filter 14 is detachably installed on the end face of the port of the inner peripheral wall 112. More specifically, the edge of the anti-clogging filter 14 is provided with an annular flange 141, and the end face of the port of the inner peripheral wall 112 is provided with an annular boss 112c around the port of the inner peripheral wall 112. The flange is fitted into the outer wall of the boss 112c, thereby allowing the anti-clogging filter 14 to be detachably installed on the end face of the port of the inner peripheral wall 112.

[0126] The flange 141 can also be designed as a radially elastically openable structure, so that when the flange 141 is fitted onto the outer wall of the boss 112c, the radially elastically openable structure clamps the outer wall of the boss 112c in a radially elastically open state.

[0127] The anti-clogging filter 14 may include a metal ring and a mesh surface disposed on the inner hole of the metal ring. The flange 141 is formed by bending and deforming the metal ring, and the flange 141 is provided with circumferentially spaced cutting grooves 142, thereby forming a radially elastically openable structure.

[0128] By installing an anti-clogging filter 14 at the inlet of the filtered media collection chamber 114 and adopting preventive protection measures by installing the anti-clogging filter 14 before installing the cartridge filter element 12 and the cylindrical shell 13 onto the base 11, the technical problem of external contaminants easily falling into the filtered media collection chamber 114 during the filter assembly process is effectively solved, fundamentally avoiding clogging of the filtered media collection chamber 114 caused by the intrusion of external contaminants. The pre-installation design of the anti-clogging filter 14 ensures that the filtered media collection chamber 114 is always in a protected state during the subsequent installation of the cartridge filter element 12 and the cylindrical shell 13, significantly improving the cleanliness and reliability of the filter assembly process. This technical solution does not rely on manual operation procedures and achieves technical control of the contamination risk during the assembly process through a structured protective design.

[0129] The working principles of the filtration devices in the two embodiments described above are basically the same. First, the medium to be filtered enters the medium collection chamber 113 through the one-way valve mechanism. In Embodiment 1, the one-way valve mechanism is located inside the side valve block 30; in Embodiment 2, the one-way valve mechanism is directly integrated into the first part.

[0130] The function of the one-way valve mechanism for the filtered medium is as follows: First, it prevents the filtered medium from flowing backward. When the system stops, the one-way valve mechanism prevents the filtered medium in the medium collection chamber 113 from flowing back, avoiding system turbulence. Second, when multiple filters 10 are operating in parallel, the resistance difference between the filters 10 may cause uneven distribution or even reverse flow of the filtered medium among the different filters 10. The one-way valve mechanism ensures that the filtered medium can only flow into each filter 10 in one direction, maintaining the independence and stability of the flow distribution among the filters 10. Third, the wind turbine gearbox will generate pressure pulsations when operating under varying loads. The one-way valve mechanism can block these pressure fluctuations from propagating upstream.

[0131] Then, the medium to be filtered enters the cartridge filter element 12 through the medium guide channel for filtration. The filtered medium then enters the filtered medium collection chamber 114 through the filtered medium outlet of the cartridge filter element 12. Before entering the filtered medium collection chamber 114, the filtered medium needs to pass through the anti-clogging filter screen 14, which plays an important protective role during the assembly of the filter 10, ensuring that the filtered medium collection chamber 114 is not invaded by external pollutants before the cartridge filter element 12 and the cylindrical housing 13 are installed.

[0132] In the filtered medium collection chamber 114, when the temperature of the filtered medium is high, the first axial pressure is relatively small, and the second axial pressure generated by the elastic pre-tightening device 1153 dominates. The valve core 1152 moves in the direction of the second axial pressure, and the conduction channel area between the valve core side opening 1152a and the valve sleeve side opening 1151a decreases, allowing more filtered medium to be output through the first output channel 116. When the temperature of the filtered medium is low, the viscosity increases, leading to an increase in pressure. The first axial pressure increases, the valve core 1152 moves in the direction of the first axial pressure, the conduction channel area increases, and more filtered medium is output through the second output channel 117.

[0133] When multiple filters 10 are configured in parallel, they are connected by a docking structure 120. The first outlet is connected to the first outlet, the second outlet is connected to the second outlet, and the third outlet is connected to the third outlet, forming a unified output system. The pressure equalization channel 124 ensures pressure balance in the media collection chamber 113 of each filter 10.

[0134] The filtration device of Embodiment 3, based on Embodiment 2, designs the valve seat as an independent component and assembles it together with the base 11. This design takes into account the scenario where the base 11, the cartridge filter element 12, and the cylindrical housing 13 are designed as a single, integral filter assembly that can be installed / replaced on the valve seat. Thus, when the filtration performance of the cartridge filter element 12 deteriorates, the filter assembly can be directly replaced without separately removing the cylindrical housing 13 to replace the cartridge filter element 12, thereby significantly improving maintenance efficiency, reducing downtime, and lowering maintenance costs.

[0135] Specifically, the integrated valve control device in Embodiment 3 includes a separately manufactured valve seat, which has a first part and a second part integrally machined. The first part is provided with a one-way valve mechanism for the medium to be filtered, which may include a first one-way valve structure 125a and a second one-way valve structure 125b arranged in parallel and operating independently. The second part is provided with a temperature control and distribution mechanism for the filtered medium flow path, which includes a temperature control valve group 115, a first output channel 116, and a second output channel 117.

[0136] In one optional embodiment, the inlet of the filter medium input channel 123 on the base 11 can be arranged in the same direction as the outlet of the filtered medium collection cavity 114. For example, both the inlet of the filter medium input channel 123 and the outlet of the filtered medium collection cavity 114 are arranged at the bottom of the base 11 (see reference). Figure 7 (in this state), the valve seat of the integrated valve control device can be designed as a rectangular block structure, which facilitates the manufacturing of the valve seat.

[0137] In summary, Embodiment 1 retains the side valve block 30 and integrates the temperature control valve group 115, the first output channel 116, and the second output channel 117 into the base 11; Embodiment 2 completely eliminates the bottom valve block 20 and the side valve block 30 through an integrated valve control device, and integrates the first filter medium check valve structure 125a, the second filter medium check valve structure 125b, the temperature control valve group 115, the first output channel 116, and the second output channel 117 into the base 11; Embodiment 3 adopts an independent valve seat design based on Embodiment 2, and forms an integrally replaceable filter assembly including the base 11, the cartridge filter element 12, and the cylindrical shell 13.

[0138] The wind turbine gearbox lubrication and cooling system disclosed herein employs a filtration device according to any of the above embodiments. The filtration device filters a viscous-temperature medium, which is lubricating oil from the gearbox of the wind turbine generator. Before filtration, the lubricating oil is the lubricating oil to be filtered, and after filtration, it is the filtered lubricating oil. The first output channel 116 is used to introduce the filtered lubricating oil into the lubricating oil cooler, and the second output channel 117 is used to introduce the filtered lubricating oil around the lubricating oil cooler into the gearbox.

[0139] The foregoing has described the relevant content of this disclosure. Those skilled in the art will be able to implement this disclosure based on these descriptions. All other embodiments obtained by those skilled in the art based on the foregoing content of this specification without inventive effort should fall within the scope of this disclosure.

Claims

1. A filter, comprising: A base; A cartridge-type filter element; And a cylindrical shell; The base has an outer peripheral wall and an inner peripheral wall located within the outer peripheral wall. The port of the outer peripheral wall forms an outer interface on the surface of the base, and the port of the inner peripheral wall forms an inner interface on the surface of the base. A collection cavity for the medium to be filtered is formed in the base between the outer peripheral wall and the inner peripheral wall, and a collection cavity for the filtered medium is formed inside the inner peripheral wall. The cartridge filter element is installed on the inner interface, and the filtered media outlet of the cartridge filter element is connected to the filtered media collection chamber through the inner interface. The cylindrical shell is installed on the outer interface and fitted onto the outside of the cartridge filter element. The reserved gap between the fitted cylindrical shell and the cartridge filter element forms a flow channel for the filter medium that is connected to the flow chamber of the filter medium. Its features are: An anti-clogging filter screen is installed at the inlet of the filtered media collection chamber before the cartridge filter element and the cylindrical shell are installed on the base.

2. The filter as described in claim 1, characterized in that: The anti-clogging filter screen is detachably installed on the end face of the port on the inner peripheral wall.

3. The filter as described in claim 2, characterized in that: The anti-clogging filter screen has an annular flange on its edge, and an annular boss is provided around the port of the inner peripheral wall on the end face of the port. The flange is fitted into the outer wall of the boss, so that the anti-clogging filter screen can be detachably installed on the end face of the port of the inner peripheral wall.

4. The filter as described in claim 3, characterized in that: The flange is designed as a radially elastically opening and closing structure, so that when the flange is fitted onto the outer wall of the boss, the radially elastically opening structure clamps the outer wall of the boss in a radially elastically opening state.

5. The filter as described in claim 4, characterized in that: The anti-clogging filter screen includes a metal ring and a mesh surface set on the inner hole of the metal ring; the flange is formed by bending and deforming the metal ring, and the flange is provided with circumferentially spaced cutting grooves, thereby forming a radially elastically openable structure.

6. The filter as claimed in claim 1, characterized in that: A filter used in wind turbine gearbox lubrication and cooling systems to filter lubricating oil from the gearbox of a wind turbine generator.

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