Oil filter

Abstract

The utility model discloses an oil filter. The oil filter comprises an oil filter tank and a filter head, the filter head comprises a first inflow port, a first outflow port, a second inflow port and a second outflow port, and a third inflow port and a third outflow port which are communicated with each other are formed in the positions, corresponding to the first outflow port and the second inflow port, of the oil filter tank; a flow control valve is arranged on one side of the first flow inlet of the filter head and comprises a valve body and a valve element, the valve element is movably arranged in the valve body, an opening in one end of the valve body is configured to be used for being connected with a supply pipeline, and the other end of the valve body is of a closed structure; the valve element is of a hollow pipe body structure with openings in the two ends, a first liquid discharging opening and a second liquid discharging opening are formed in the positions, corresponding to the first flow-out opening, of the valve element and the valve body respectively, the first flow-out opening, the first liquid discharging opening and the second liquid discharging opening are kept in a mutual communication state, and stable fluid fluidity is kept under different fluid pressures. Therefore, the filtering effect of the oil filtering tank can meet the use requirement of a hydraulic system.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of hydraulic machinery, and particularly to an oil filter. Background Art

[0002] In a hydraulic system, after long-term use, due to reasons such as wear of instruments, there will be some impurities in the oil, which will affect the service life of the hydraulic machinery. Therefore, a filter needs to be set in the hydraulic system to ensure the service life of the hydraulic machinery.

[0003] However, during the process of filtering the oil by the existing filters, as the use time increases, the hydraulic pressure of the oil flowing through the filter changes, resulting in poor filtering effect on the oil and the flow rate and velocity not meeting the usage requirements of the hydraulic system. Summary of the Invention

[0004] The purpose of the embodiments of the present application is to provide an oil filter, which can solve the problem of maintaining a stable filtering effect under different hydraulic pressures of the oil.

[0005] To achieve the above purpose, the embodiments of the present application provide an oil filter, including: a filter oil tank and a filter head;

[0006] The filter head includes a first inlet, a first outlet, a second inlet and a second outlet, and the filter oil tank is provided with a third inlet and a third outlet that are interconnected at positions corresponding to the first outlet and the second inlet;

[0007] A flow control valve is provided on one side of the first inlet of the filter head. The flow control valve includes a valve body and a valve core. The valve body is a hollow tube structure with openings at both ends. The valve core is movably arranged in the valve body. One opening end of the valve body is configured to be connected to a supply pipeline, and the other end is a closed structure;

[0008] The valve core is a hollow tube structure with openings at both ends. A first drain port and a second drain port are respectively provided on the valve core and the valve body at positions corresponding to the first outlet. When the valve core moves to any position in the valve body, the first outlet, the first drain port and the second drain port remain in a mutually connected state.

[0009] Optionally, the valve core is connected to the valve body through a first limiting member. The first limiting member is arranged at the closed end in the valve body, and the first limiting member is used to limit the moving distance of the valve core in the valve body;

[0010] The valve core is provided with a plurality of second drain ports, and grooves are provided on the valve core at positions corresponding to the second drain ports. The width of the grooves is not less than the moving distance of the valve core in the valve body.

[0011] Optionally, the valve body is provided with a first diameter-changing section and a second diameter-changing section along a preset direction. The radii of the first diameter-changing section and the second diameter-changing section match the inner wall radius of the filter head, and a first cavity is formed between the first drain port and the inner wall of the filter head. The first flow outlet is communicated with the first drain port through the first cavity.

[0012] Optionally, third diameter-changing sections and fourth diameter-changing sections are provided on both sides of the groove of the valve core along the preset direction. The groove of the valve core is arranged on the third diameter-changing section, so that a sealed second cavity is formed between the groove of the valve core and the inner wall of the valve body. The first drain port and the second drain port are communicated through the second cavity.

[0013] Optionally, a coarse filter assembly is provided at the opening of the valve core facing the supply pipeline side. A second limiting member is provided on the valve core on one side of the coarse filter assembly. A limiting boss corresponding to the second limiting member is provided on the inner wall of the valve body.

[0014] Optionally, a plurality of third inlets are provided on the oil filter tank, and the plurality of third inlets are all communicated with the first flow outlet.

[0015] Optionally, the plurality of third inlets are evenly distributed on the oil filter tank along the circumferential direction. A first seal and a second seal are provided on the inner and outer sides in the radial direction of the plurality of third inlets. The first seal and the second seal form a third cavity between the filter head and the oil filter tank, and the first flow outlet is communicated with the plurality of third inlets through the third cavity.

[0016] Optionally, the central axis of the third flow outlet overlaps with the central axis of the oil filter tank. An insert for inserting into the third flow outlet is provided at the position of the filter head corresponding to the third flow outlet. The second inlet penetrates through the insert, and a threaded connection structure is provided between the insert and the third flow outlet.

[0017] Optionally, the second seal is arranged inside the third inlet. The second seal is a sealing ring, and the sealing ring is sleeved on the insert, so that the second seal is configured to seal the connection position between the third flow outlet and the second inlet.

[0018] Optionally, a pressure gauge is provided on the filter head, and the pressure gauge is used to monitor the fluid pressure inside the filter head.

[0019] The oil filter provided by the embodiment of the present application has stable fluid fluidity under different fluid pressures, so as to ensure that the filtering effect of the oil filter tank can meet the use requirements of the hydraulic system. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings required for the description of the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of an oil filter provided for the embodiments of the present application;

[0022] Figure 2 For Figure 1 Schematic cross-sectional view of the oil filter shown in

[0023] Figure 3 For Figure 2 Enlarged schematic view of the connection position between the filter head and the filter oil tank in

[0024] Figure 4 For Figure 2 Schematic cross-sectional view of the flow control valve in

[0025] Explanation of reference numerals:

[0026] 1000, filter head;

[0027] 100, inner cavity; 101, first fluid inlet; 102, first fluid outlet; 103, second fluid inlet; 104, second fluid outlet;

[0028] 200, valve body; 211, first drain port; 212, end cover; 213, first reduced-diameter section; 214, second reduced-diameter section;

[0029] 300, valve core; 310, coarse filter assembly; 311, second drain port; 312, third reduced-diameter section; 313, fourth reduced-diameter section; 314, first limiting member; 315, second limiting member; 316, damping member;

[0030] 400, sealing ring; 410, first seal; 411, second seal;

[0031] 500, pressure gauge;

[0032] 2000, filter oil tank;

[0033] 2001, third fluid inlet; 2002, third fluid outlet. Detailed implementation manners

[0034] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the following will clearly and completely describe the technical solutions in the embodiments of this application with reference to the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, rather than all of them.

[0035] All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0036] An embodiment of this application provides an oil filter, which includes a filter head 1000 and a filter oil tank 2000;

[0037] The filter head 1000 includes a first inlet 101, a first outlet 102, a second inlet 103, and a second outlet 104. A third inlet 2001 and a third outlet 2002 are provided on the filter oil tank 2000 at positions corresponding to the first outlet 102 and the second inlet 103;

[0038] Reference Figure 1 、 Figure 2 , specifically, the filter head 1000 is a hollow tube structure with openings at both ends. The openings at both ends of the filter head 1000 are configured as the first inlet 101 and the second outlet 104 of the filter head 1000. The openings of the first outlet 102 and the second inlet 103 of the filter head 1000 are both arranged downward. Among them, the central axis of the second inlet 103 is located at the center of the filter head 1000. A third inlet 2001 and a third outlet 2002 are provided above the filter oil tank 2000. The third inlet 2001 and the third outlet 2002 are respectively arranged corresponding to the first outlet 102 and the second inlet 103. A flow control valve is provided on one side of the first inlet 101. The flow control valve separates the first inlet 101 and the second outlet 104 and connects the first inlet 101 and the first outlet 102.

[0039] A flow control valve is provided on one side of the first inlet 101 of the filter head 1000. The flow control valve includes a valve body 200 and a valve core 300. The valve core 300 is movably arranged in the valve body 200. The inlet end of the valve body 200 is configured to be connected to a supply pipeline. A first drain port 211 and a second drain port 311 are respectively provided on the valve core 300 and the valve body 200 at positions corresponding to the first outlet 102. When the valve core 300 moves to any position, the first outlet 102, the first drain port 211, and the second drain port 311 remain in a mutually connected state.

[0040] The spool 300 is a hollow tube structure with openings at both ends. One end opening of the spool 300 is connected to the supply pipeline, and the other end is connected to the valve body 200 through the first limiting member 314. Multiple second drain ports 311 can be provided on the spool 300. The multiple second drain ports 311 are evenly distributed along the circumferential direction with the central axis of the spool 300 as the center. A groove is circumferentially provided around the spool 300 at the position corresponding to the second drain port 311, so that a gap is formed between the outer wall of the spool 300 at the position of the second drain port 311 and the inner wall of the valve body 200 at the position corresponding to the second drain port 311. And a first drain port 211 is provided on the valve body 200 at the position corresponding to the groove. Through the limiting effect of the first limiting member 314 on the spool 300, the groove and the first drain port 211 remain in a mutually connected state during the movement of the spool 300, so as to achieve the effect that the first drain port 211 and the second drain port 311 remain in a mutually connected state. Moreover, the valve body 200 is fixedly arranged in the inner cavity 100 of the filter head 1000, so that during the process of the fluid in the supply pipeline flowing through the flow control valve, the first drain port 211, the second drain port 311 and the first outlet 102 always remain in a mutually connected state.

[0041] A end cover 212 is provided at the closed end of the valve body 200. A positioning boss is provided on the end cover 212. One end of the first limiting member 314 can be fixedly arranged on the positioning boss, and the other end is connected to one end of the spool 300. Preferably, the first limiting member 314 is a telescopic spring, and the elastic force of the telescopic spring is used to limit the moving distance of the spool 300 in the valve body 200. Thus, the spool 300 and the first drain port 211 and the second drain port 311 on the valve body 200 can always remain in a mutually connected state.

[0042] Furthermore, since one end of the spool 300 connected to the first limiting member 314 is an open structure, when the fluid pressure in the supply pipeline increases, in order to prevent the fluid pressure from causing excessive extrusion on the spool 300, resulting in the inability to maintain the connected state between the groove structure and the first drain port 211. Therefore, an open structure is provided at the end of the spool 300 connected to the first limiting member 314, so that the fluid that cannot be discharged in time through the second drain port 311 can flow to the other end. And the side of the valve body 200 corresponding to the first limiting member 314 is a closed structure. As the fluid flows in, a reverse thrust can be formed on the spool 300, preventing the fluid pressure flowing into the spool 300 from being too large, resulting in the inability to maintain the mutually connected state between the first drain port 211 and the second drain port 311 due to the excessive moving distance of the spool 300.

[0043] Reference Figure 4, on the valve core 300, a third diameter-changing section 312 and a fourth diameter-changing section 313 are provided along a preset direction. The radius of the third diameter-changing section 312 matches the inner wall radius of the valve body 200, and the groove of the valve core 300 is arranged on the third diameter-changing section 312, so that a sealed second cavity is formed between the groove of the valve core 300 and the inner wall of the valve body 200, and the first liquid discharge port 211 and the second liquid discharge port 311 are communicated through the second cavity.

[0044] The radius of the fourth diameter-changing section 313 is smaller than the inner wall radius of the valve body 200, so that the telescopic spring of the first limiting member 314 can be sleeved on the fourth diameter-changing section 313, and in cooperation with the cooperation between the third diameter-changing section 312 and the inner wall of the valve body 200, it is ensured that the valve core 300 can move freely in the valve body 200, and the first limiting member 314 limits the moving distance of the valve core 300, so as to realize that the flow control valve can always maintain the communication state with the filter oil tank 2000 during the process of fluid pressure change.

[0045] Furthermore, on the valve body 200, a first diameter-changing section 213 and a second diameter-changing section 214 are provided along a preset direction. The radii of the first diameter-changing section 213 and the second diameter-changing section 214 match the inner wall diameter change of the filter head 1000, and a first cavity is formed between the first liquid discharge port 211 and the inner wall of the filter head 1000, and the first flow outlet 102 is communicated with the first liquid discharge port 211 through the first cavity.

[0046] Furthermore, in order to realize the fixed connection structure between the valve body 200 and the filter head 1000, a threaded portion is provided on the first diameter-changing section 213 and / or the second diameter-changing section 214, and a threaded structure matching the threaded portion is provided on the inner wall of the filter head 1000, so that the flow control valve can be fixedly arranged in the filter head 1000, and sealing rings 400 can be provided on both the first diameter-changing section 213 and the second diameter-changing section 214, so as to ensure the connection stability between the flow control valve and the filter head 1000, and at the same time avoid liquid leakage at the connection position between the flow control valve and the filter head 1000.

[0047] A coarse filter assembly 310 is provided at the opening position on the side of the valve core 300 facing the inlet, so that the flow control valve can have a preliminary filtering effect and avoid affecting the fluidity of the filter oil tank 2000.

[0048] A second limiting member 315 can also be provided at the opening position on the side of the valve core 300 facing the inlet. Six small oil holes communicating with the inner cavity 100 of the valve core 300 are provided on the second limiting member 315. When the coarse filter assembly 310 is blocked, it does not affect the oil to release pressure through the small oil holes, so as to ensure the fluidity in the valve core 300 and reduce the failure of the flow control valve due to the blockage of the coarse filter assembly 310.

[0049] A damping member 316 may be provided at a position on the inner wall of the valve core 300 between the inlet and the second drain port 311. In order to make the flow control valve applicable to different oil pressures, regardless of the change in the oil pressure in the supply pipeline, the flow rate flowing into the oil filter tank 2000 is the nominal set value.

[0050] A plurality of third inlets 2001 are provided at the connection position between the oil filter tank 2000 and the filter head 1000. The plurality of third inlets 2001 are all communicated with the first outlet 102. In order to prevent fluid leakage between the first outlet 102 and the plurality of third inlets 2001, the plurality of third inlets 2001 are evenly distributed in the circumferential direction, and two first seals 410 and second seals 411 with different radii are provided with the center of the circle in the circumferential direction where the third inlets 2001 are evenly distributed, so that the third inlets 2001 can be located between the first seal 410 and the second seal 411, and the filter head 1000 and the oil filter tank 2000 cooperate with the first seal 410 and the second seal 411 to form a third cavity, and the first inlet 101 of the filter head 1000 and the third inlet 2001 of the oil filter tank 2000 are communicated through the third cavity, so as to achieve a good sealing effect at the connection position between the filter head 1000 and the oil filter tank 2000 and avoid liquid leakage.

[0051] The third outlet 2002 of the oil filter tank 2000 is located at the position of the center of the circle in the circumferential direction where the third inlets 2001 are evenly distributed. An insert for inserting into the third outlet 2002 may be provided at the corresponding position of the filter head 1000. The second inlet 103 penetrates through the insert, so as to form a communicating structure between the third outlet 2002 and the second inlet 103; further, in order to form a stable connection structure between the filter head 1000 and the oil filter tank 2000, corresponding thread structures are provided on the outer wall of the insert and the inner wall on one side of the third inlet 2001, so as to form a stable connection structure between the filter head 1000 and the oil filter tank 2000.

[0052] Further, referring to Figure 3 , a sealing plate is provided on the top of the oil filter tank 2000. The sealing plate bulges upward in the radial direction towards the central axis of the third outlet 2002 and forms an inclined surface, and the third inlet 2001 is arranged on the inclined surface, so as to avoid liquid accumulation in the third cavity.

[0053] The radius of the second seal 411 is smaller than that of the first seal 410. The second seal 411 can be sleeved on the outer wall of the insert, so that the second seal 411 not only forms a sealing effect on the third cavity between the first fluid outlet 102 and the third fluid inlet 2001, but also can serve as a seal between the insert and the third fluid outlet 2002, realizing a good sealing effect at multiple connection positions between the filter head 1000 and the oil filter tank 2000.

[0054] A pressure gauge 500 can be provided on the filter head 1000, and the pressure gauge 500 is used to monitor the fluid pressure of the filter head 1000. During specific use, the staff can judge the usage status of the oil filter tank 2000 and the coarse filter assembly 310 according to the monitoring data of the pressure gauge 500, so as to clean or replace each filter component at an appropriate time, thereby ensuring that the oil filter can maintain a stable filtering effect.

[0055] A rotatable mounting bracket is also provided on the filter head 1000. In order to achieve the smooth installation of the above-mentioned oil filter in different environments, a mounting bracket can be provided on the filter head 1000, and the mounting bracket can rotate relative to the filter head 1000, so as to achieve smooth installation in a special installation environment and improve the applicable scenarios of the oil filter.

[0056] Among them, terms such as "upper" and "lower" are used to describe the relative positional relationship of each structure in the drawings, only for the sake of clarity in narration, rather than to limit the scope of implementation of the present application. The change or adjustment of its relative relationship, without substantial change in technical content, should also be regarded as the scope of implementation of the present application.

[0057] It should be noted that in the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0058] In addition, in the present application, unless otherwise clearly specified and limited, terms such as "install", "connect", "couple", "fix" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0059] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil filter, characterized in that, Comprising: A filter oil tank (2000) and a filter head (1000); The filter head (1000) includes a first fluid inlet (101), a first fluid outlet (102), a second fluid inlet (103) and a second fluid outlet (104). At positions corresponding to the first fluid outlet (102) and the second fluid inlet (103) on the filter oil tank (2000), there are provided a third fluid inlet (2001) and a third fluid outlet (2002) that are interconnected; On one side of the first fluid inlet (101) of the filter head (1000), there is a flow control valve. The flow control valve includes a valve body (200) and a valve core (300). The valve body (200) is a hollow tube structure with openings at both ends. The valve core (300) is movably disposed within the valve body (200). One end opening of the valve body (200) is configured to be connected to a supply pipeline, and the other end is a closed structure; The valve core (300) is a hollow tube structure with openings at both ends. At positions corresponding to the first fluid outlet (102) on the valve core (300) and the valve body (200), there are respectively provided a first drain port (211) and a second drain port (311). When the valve core (300) moves to any position within the valve body (200), the first fluid outlet (102), the first drain port (211) and the second drain port (311) remain in a mutually communicating state.

2. The oil filter according to claim 1, characterized in that, The valve core (300) is connected to the valve body (200) through a first limiting member (314). The first limiting member (314) is disposed at the closed end within the valve body (200), and the first limiting member (314) is used to limit the moving distance of the valve core (300) within the valve body (200); The valve core (300) is provided with a plurality of second drain ports (311). At positions corresponding to the second drain ports (311) on the valve core (300), there are provided grooves. The width of the grooves is not less than the moving distance of the valve core (300) within the valve body (200).

3. The oil filter according to claim 2, wherein, The valve body (200) is provided with a first diameter-changing section (213) and a second diameter-changing section (214) along a preset direction. The radii of the first diameter-changing section (213) and the second diameter-changing section (214) match the inner wall radius of the filter head (1000), and a first cavity is formed between the first drain port (211) and the inner wall of the filter head (1000). The first fluid outlet (102) is communicated with the first drain port (211) through the first cavity.

4. The oil filter according to claim 3, characterized in that, On both sides of the groove along the preset direction on the valve core (300), there are provided a third diameter-changing section (312) and a fourth diameter-changing section (313). The groove of the valve core (300) is disposed on the third diameter-changing section (312), so that a sealed second cavity is formed between the groove of the valve core (300) and the inner wall of the valve body (200). The first drain port (211) and the second drain port (311) are communicated through the second cavity.

5. The oil filter according to claim 4, characterized in that, A coarse filter assembly (310) is provided at the opening on the side of the valve core (300) facing the supply pipeline. A second limiting member (315) is provided on the valve core (300) on one side of the coarse filter assembly (310). A limiting boss corresponding to the second limiting member (315) is provided on the inner wall of the valve body (200).

6. The oil filter according to any one of claims 1-5, characterized in that, A plurality of third inlets (2001) are provided on the oil filter tank (2000), and the plurality of third inlets (2001) are all communicated with the first outlet (102).

7. The oil filter according to claim 6, characterized in that The plurality of third inlets (2001) are evenly distributed along the circumferential direction on the oil filter tank (2000). First seals (410) and second seals (411) are provided on both the inner and outer sides in the radial direction of the plurality of third inlets (2001). The first seals (410) and the second seals (411) cooperate with the filter head (1000) and the oil filter tank (2000) to form a third cavity, and the first outlet (102) is communicated with the plurality of third inlets (2001) through the third cavity.

8. The oil filter according to claim 7, characterized in that, The central axis of the third outlet (2002) overlaps with the central axis of the oil filter tank (2000). An insertion member for inserting into the third outlet (2002) is provided on the filter head (1000) at the position corresponding to the third outlet (2002). The second inlet (103) penetrates through the insertion member, and a threaded connection structure is provided between the insertion member and the third outlet (2002).

9. The oil filter according to claim 8, characterized in that, The second seal (411) is arranged inside the third inlet (2001). The second seal (411) is a sealing ring (400). The sealing ring (400) is sleeved on the insertion member, so that the second seal (411) is configured to form a sealing effect at the connection position of the third outlet (2002) and the second inlet (103).

10. The oil filter according to claim 1, characterized in that, A pressure gauge (500) is provided on the filter head (1000), and the pressure gauge (500) is used to monitor the fluid pressure inside the filter head (1000).

Images