A high-efficiency filter valve structure based on a Tesla valve

Abstract

The utility model discloses a kind of high-efficiency filter valve structures based on Tesla valve, belong to valve technical field.The structure includes Tesla valve, filter component A and filter assembly B, the Tesla valve includes valve body and the valve core being arranged in valve body, the filter component A is arranged in valve body, and located at the positive output end of valve core internal flow channel, and the effective filter area of filter component A is greater than the valve body bore area of its position, the filter assembly B is located in valve body, and located at the positive input end of valve core internal flow channel, and the effective filter area of filter assembly B is greater than the valve body bore area of its position.Because the effective filter area of filter component A and the effective filter area of filter assembly B, both are greater than the plane filter screen of effective filter area and valve body bore area equal, therefore, improve the filtration efficiency of filter component A and filter assembly B to hydraulic oil, reduce the flow resistance of hydraulic oil by them, and not prone to plugging screen situation.

Description

Technical Field

[0001] This utility model relates to a high-efficiency filter valve structure based on a Tesla valve, belonging to the field of valve technology. Background Technology

[0002] The Tesla valve is a cleverly designed passive check valve. It has no moving parts and relies entirely on fluid dynamics principles to achieve unidirectional fluid flow. When fluid flows in the designed direction (low-resistance direction), it tends to choose the path of least resistance. In this direction, the bifurcation point guides the main flow directly along a relatively straight path with minimal curvature. The fluid does not generate strong collisions or large-scale eddies at the bifurcation point, resulting in relatively small energy loss and a smooth, direct overall flow path. However, when the fluid attempts to flow in the opposite direction, the asymmetry of the channel begins to act as a barrier. At the bifurcation point, the fluid is guided towards the sidewalls or directly impacts the protrusions in the channel. This impact leads to strong turbulence and eddies, a significantly longer flow path, and momentum loss. These effects combined generate flow resistance much higher than in the downstream direction.

[0003] However, the reverse flow characteristics of a Tesla valve under low pressure differ significantly from those under high pressure or high-speed flow, primarily manifested as decreased resistance, increased leakage, and reduced energy dissipation efficiency. Equipment such as shock absorbers requires switching between high and low pressure during operation. Therefore, if a Tesla valve is applied to the hydraulic circuit of such equipment, the forward or reverse flow of hydraulic oil within the Tesla valve will inevitably carry metal debris and other impurities generated by the friction and wear of internal shock absorber components into the valve's flow channel. Over time, this can easily cause blockage of the Tesla valve's internal flow channel, thus affecting the normal operation of the shock absorber.

[0004] Therefore, filters need to be installed at both ends of the internal flow channel of the Tesla valve to filter the hydraulic oil and prevent large particles of impurities from entering the internal flow channel of the Tesla valve. Most common filters are flat filters, but flat filters have a small effective filtration area, low filtration efficiency, high resistance to hydraulic oil flow, and are prone to clogging. Utility Model Content

[0005] To solve the above-mentioned technical problems, this utility model provides a high-efficiency filter valve structure based on a Tesla valve.

[0006] This utility model is achieved through the following technical solution:

[0007] A high-efficiency filter valve structure based on a Tesla valve includes a Tesla valve, a filter element A, and a filter assembly B. The Tesla valve includes a valve body and a valve core disposed within the valve body. The filter element A is disposed within the valve body and located at the forward output end of the internal flow channel of the valve core, and the effective filtration area of ​​the filter element A is larger than the internal bore area of ​​the valve body at its location. The filter assembly B is located within the valve body and located at the forward input end of the internal flow channel of the valve core, and the effective filtration area of ​​the filter assembly B is larger than the internal bore area of ​​the valve body at its location.

[0008] The filter component A includes a gasket, a threaded sleeve, and a filter assembly A arranged sequentially within the valve body, with the filter assembly A positioned away from the valve core.

[0009] The sleeve is threadedly connected to the valve body.

[0010] The filter assembly A is fixed by a mortise on the valve body at the end away from the filter assembly B.

[0011] The shape and structure of the filter component B are the same as those of the filter component A.

[0012] The filter assembly B includes a base plate and a filter screen disposed on the base plate, and the base plate has a flow hole that communicates with the interior of the space enclosed by the filter screen.

[0013] The filter screen is hemispherical, conical, cylindrical, or trapezoidal.

[0014] The valve body is connected to a sealing sleeve at the positive input end. The outer diameter of the sealing sleeve is the same as the outer diameter of the valve body, and several grooves are formed on the outer circular surface of the sealing sleeve along the circumferential direction.

[0015] The sealing sleeve extends into the valve body and is fitted with the valve body with a clearance. One end of the sealing sleeve that extends into the valve body engages with the internal step of the valve body to limit the position of the filter assembly B.

[0016] A threaded sleeve is connected to the end of the sealing sleeve away from the Tesla valve.

[0017] The beneficial effects of this utility model are as follows: Since the effective filtration area of ​​filter component A is greater than the internal bore area of ​​the valve body at its location, and the effective filtration area of ​​filter assembly B is greater than the internal bore area of ​​the valve body at its location, the effective filtration areas of both filter component A and filter assembly B are greater than the effective filtration area of ​​a planar filter screen that is equal to the internal bore area of ​​the valve body. Therefore, the filtration efficiency of filter component A and filter assembly B for hydraulic oil is improved, their flow resistance to hydraulic oil is reduced, and clogging is less likely to occur. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] In the diagram: 1-Filter assembly A, 2-First threaded sleeve, 3-Washer, 4-Tesla valve, 40-Valve core, 41-Valve body, 5-Filter assembly B, 50-Base plate, 51-Filter screen, 6-Sealing sleeve, 60-Groove, 7-Second threaded sleeve. Detailed Implementation

[0020] The technical solution of this utility model is further described below, but the scope of protection is not limited to what is described.

[0021] like Figure 1 As shown, the present invention discloses a high-efficiency filter valve structure based on a Tesla valve, comprising a Tesla valve 4, a filter component A, and a filter assembly B5. The Tesla valve 4 includes a valve body 41 and a valve core 40 disposed within the valve body 41. The filter component A is disposed within the valve body 41 and located at the forward output end of the internal flow channel of the valve core 40, and the effective filtration area of ​​the filter component A is greater than the area of ​​the inner bore of the valve body 41 at its location. The filter assembly B5 is located within the valve body 41 and located at the forward input end of the internal flow channel of the valve core 40, and the effective filtration area of ​​the filter assembly B5 is greater than the area of ​​the inner bore of the valve body 41 at its location. During operation, when the hydraulic oil flows forward within the Tesla valve 4, the filter assembly B5 intercepts metal debris and other impurities in the hydraulic oil, preventing large particles from entering the internal flow channel of the Tesla valve 4. Under low pressure, when the hydraulic oil flows backward within the Tesla valve 4, the filter assembly A intercepts metal debris and other impurities in the hydraulic oil, again preventing large particles from entering the internal flow channel of the Tesla valve 4. This prevents a large amount of impurities from entering the internal flow channel of the Tesla valve 4 and causing blockage, ensuring the shock absorber can operate normally for a long time. Since the effective filtration area of ​​filter assembly A is larger than the area of ​​the inner bore of valve body 41 at its location, and the effective filtration area of ​​filter assembly B5 is also larger than the area of ​​the inner bore of valve body 41 at its location, both the effective filtration areas of filter assembly A and filter assembly B5 are larger than those of a planar filter screen with an effective filtration area equal to the area of ​​the inner bore of valve body 41. Therefore, the filtration efficiency of filter assembly A and filter assembly B5 for the hydraulic oil is improved, their flow resistance to the hydraulic oil is reduced, and blockage is less likely to occur.

[0022] The filter component A includes a washer 3, a first threaded sleeve 2, and a filter assembly A1, which are sequentially disposed within the valve body 41, with the filter assembly A1 positioned away from the valve core 40. In use, after the washer 3 is placed inside the valve body 41, it is secured by tightening the first threaded sleeve 2. The washer 3, in conjunction with the first threaded sleeve 2, positions the filter assembly A1 axially within the valve body 41. Then, the end of the valve body 41 furthest from the filter assembly B5 is mortised to secure the filter assembly A1.

[0023] The first threaded sleeve 2 is threadedly connected to the valve body 41.

[0024] The filter assembly A1 is fixed by a mortise at the end of the valve body 41 away from the filter assembly B5. In use, the filter screen 51 in the filter assembly A1 extends outside the valve body 41.

[0025] The shape and structure of the filter component B5 are the same as those of the filter component A1.

[0026] The filter assembly B5 includes a base plate 50 and a filter screen 51 disposed on the base plate 50, and the base plate 50 has a flow hole that communicates with the interior of the space enclosed by the filter screen 51.

[0027] The filter screen 51 is hemispherical, conical, cylindrical, or trapezoidal. The hemispherical, conical, cylindrical, or trapezoidal shape of the filter screen 51 increases its effective filtration area. Furthermore, compared to a planar filter screen, using a hemispherical, conical, cylindrical, or trapezoidal shape makes it difficult for impurities to clog all the filter holes on the filter screen 51, thus reducing the likelihood of clogging.

[0028] The valve body 41 is connected to a sealing sleeve 6 at its positive input end. The outer diameter of the sealing sleeve 6 is the same as that of the valve body 41, and several grooves 60 are provided on the outer circular surface of the sealing sleeve 6 along the circumferential direction.

[0029] The sealing sleeve 6 extends into the valve body 41 and is clearance-fitted with the valve body 41. One end of the sealing sleeve 6 extending into the valve body 41 engages with the internal step of the valve body 41 to limit the movement of the filter assembly B5. In use, the sealing sleeve 6 is welded to the housing of the Tesla valve 4; the sealing sleeve 6 extends into the housing of the Tesla valve 4 and is clearance-fitted with the housing of the Tesla valve 4, ensuring that the sealing sleeve 6 and the Tesla valve 4 are coaxially arranged. The groove 60 is used to install the sealing ring.

[0030] A second threaded sleeve 7 is connected to the end of the sealing sleeve 6 away from the Tesla valve 4. The second threaded sleeve 7 is also machined with internal threads, which facilitates the connection of the valve with other hydraulic components.

Claims

1. A high-efficiency filter valve structure based on a Tesla valve, characterized in that: The system includes a Tesla valve (4), a filter component A, and a filter assembly B (5). The Tesla valve (4) includes a valve body (41) and a valve core (40) disposed within the valve body (41). The filter component A is disposed within the valve body (41) and located at the positive output end of the internal flow channel of the valve core (40). The effective filtration area of ​​the filter component A is greater than the area of ​​the inner bore of the valve body (41) at its location. The filter assembly B (5) is located within the valve body (41) and located at the positive input end of the internal flow channel of the valve core (40). The effective filtration area of ​​the filter assembly B (5) is greater than the area of ​​the inner bore of the valve body (41) at its location.

2. The high-efficiency filter valve structure based on a Tesla valve as described in claim 1, characterized in that: The filter component A includes a washer (3), a first threaded sleeve (2) and a filter assembly A (1) arranged sequentially in the valve body (41), and the filter assembly A (1) is arranged away from the valve core (40).

3. The high-efficiency filter valve structure based on a Tesla valve as described in claim 2, characterized in that: The sleeve (2) is threadedly connected to the valve body (41).

4. The high-efficiency filter valve structure based on a Tesla valve as described in claim 2, characterized in that: The filter assembly A (1) is fixed by a mortise on the end of the valve body (41) away from the filter assembly B (5).

5. The high-efficiency filter valve structure based on a Tesla valve as described in claim 2, characterized in that: The shape and structure of the filter component B(5) are the same as those of the filter component A(1).

6. The high-efficiency filter valve structure based on a Tesla valve as described in claim 1 or 5, characterized in that: The filter assembly B (5) includes a base plate (50) and a filter screen (51) disposed on the base plate (50), and the base plate (50) has a flow hole that communicates with the interior of the space enclosed by the filter screen (51).

7. The high-efficiency filter valve structure based on a Tesla valve as described in claim 6, characterized in that: The filter screen (51) is hemispherical, conical, cylindrical or trapezoidal.

8. The high-efficiency filter valve structure based on a Tesla valve as described in claim 1, characterized in that: The valve body (41) is connected to a sealing sleeve (6) at its positive input end. The outer diameter of the sealing sleeve (6) is the same as that of the valve body (41), and several grooves (60) are provided on the outer circular surface of the sealing sleeve (6) along the circumferential direction.

9. The high-efficiency filter valve structure based on a Tesla valve as described in claim 8, characterized in that: The sealing sleeve (6) extends into the valve body (41) and is clearance-fitted with the valve body (41). One end of the sealing sleeve (6) extending into the valve body (41) is fitted with the internal step of the valve body (41) to limit the position of the filter assembly B (5).

10. The high-efficiency filter valve structure based on a Tesla valve as described in claim 8 or 9, characterized in that: A second threaded sleeve (7) is connected to one end of the sealing sleeve (6) away from the Tesla valve (4).

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