CN214092568U

CN214092568U - Multistage hydraulic filter

Info

Publication number: CN214092568U
Application number: CN202023339336.0U
Authority: CN
Inventors: 任磊石
Original assignee: Wuxi Shengrui Machinery Electronic Co ltd
Current assignee: Wuxi Shengrui Machinery Electronic Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-31
Anticipated expiration: 2030-12-31

Abstract

The application relates to a multistage hydraulic filter, which comprises a shell, wherein an oil inlet and an oil outlet are formed in the shell, a cavity is formed in the shell and is communicated with the oil inlet and the oil outlet, and a primary filtering part, a multistage filtering part and a sealing part are arranged in the cavity. The primary filter part comprises a primary steel filter element, a primary filter screen is arranged on the side wall of the primary steel filter element, a primary oil circuit cavity is formed in the primary steel filter element and communicated with the cavity, and a primary oil blocking screw is connected to the lower end of the primary steel filter element. Multistage filter portion includes multistage steel filter core, is provided with multistage filter screen on the multistage steel filter core lateral wall, has seted up multistage oil circuit chamber in the multistage steel filter core, multistage oil circuit chamber and cavity intercommunication. The sealing part comprises an upper oil plugging block and a lower oil plugging block. The hydraulic oil filter has the effect of better removing impurities in hydraulic oil.

Description

Multistage hydraulic filter

Technical Field

The application relates to the field of hydraulic equipment, in particular to a multistage hydraulic filter.

Background

The hydraulic oil is a hydraulic medium used by a hydraulic system utilizing hydraulic pressure energy, and has the functions of capacity transfer, wear resistance, system lubrication, corrosion resistance, rust resistance, cooling and the like in the hydraulic system. For hydraulic oil, the requirements of a hydraulic device on the viscosity of liquid at the working temperature and the starting temperature are firstly met, and the viscosity change of the hydraulic oil is directly related to hydraulic action, transmission efficiency and transmission precision, and the viscosity-temperature performance and the shear stability of the oil are also required to meet various requirements proposed by different purposes.

Unless regular maintenance is performed, regardless of the care taken in the installation and operation of the equipment, the hydraulic oil is contaminated and the degradation of the properties of the hydraulic oil can lead to malfunction of the hydraulic equipment. Therefore, the used hydraulic oil needs to be filtered to eliminate impurities and pollutants in the hydraulic oil and improve the performance of the hydraulic oil so as to ensure the normal operation of hydraulic equipment.

The invention patent publication CN107469446A discloses a hydraulic filter. The filter comprises a valve body, a filter element and a joint. A valve cavity is arranged in the valve body, a filter element is arranged in the valve cavity, a liquid outlet communicated with the valve cavity is formed in one end of the valve body, a joint used for assembling the hydraulic filter is connected to the other end of the valve body, and a liquid inlet is formed in the joint. During filtering, hydraulic oil enters the valve cavity from the liquid inlet, and flows out of the liquid outlet communicated with the valve cavity after being filtered by the filter element, so that the filtering of the hydraulic oil is completed.

In view of the above-mentioned related art, the inventor believes that the single-stage filtering effect of the hydraulic oil is limited, and impurities in the hydraulic oil cannot be effectively removed.

SUMMERY OF THE UTILITY MODEL

In order to better remove impurities in hydraulic oil, the application provides a multistage hydraulic filter.

The application provides a multistage hydraulic filter adopts following technical scheme:

the multistage hydraulic filter comprises a shell, wherein an oil inlet is formed in the position, close to the bottom, of the side wall of the shell, an oil outlet is formed in the position, close to the top, of the side wall of the shell, a cavity is formed in the shell and is communicated with the oil inlet and the oil outlet, and a primary filtering portion, a multistage filtering portion and a sealing portion are arranged in the cavity.

By adopting the technical scheme, the hydraulic oil enters the cavity from the oil inlet close to the bottom, and flows out of the oil outlet after passing through the primary filtering part and the multistage filtering part. The oil inlet is located the below of oil-out for hydraulic oil slowly passes through elementary filter house and multistage filter house, thereby obtains better filter effect, and the sealing is sealed the casing cavity.

Optionally, the primary filter portion is including setting up the elementary steel filter core in the cavity, be provided with elementary filter screen on the elementary steel filter core lateral wall, elementary filter screen encloses the outside of closing at elementary steel filter core, elementary oil circuit chamber has been seted up in the elementary steel filter core, elementary filter screen covers the inlet port department in elementary oil circuit chamber, the liquid outlet and the cavity intercommunication in elementary oil circuit chamber, elementary steel filter core lower extreme is connected with elementary stifled oil screw, elementary steel filter core outside upper end and shells inner wall butt, be provided with elementary sealing washer between elementary steel filter core and the casing.

Through adopting above-mentioned technical scheme, hydraulic oil gets into the cavity from the oil inlet after, gets into elementary oil circuit chamber through elementary filter screen, and elementary filter screen carries out the prefilter to hydraulic oil, because elementary steel filter core lateral wall upper end and shells inner wall butt, and still be equipped with elementary sealing washer between elementary steel filter core and the casing, makes hydraulic oil can only get into elementary oil circuit chamber through the filter screen, accomplishes the primary filter to hydraulic oil. The hydraulic oil through primary filtration contains impurity still more, and the unscheduled clearance can make elementary filter portion block up, and elementary stifled oil screw convenient to detach and installation can conveniently clear up the impurity of crossing in the elementary filter portion.

Optionally, the multistage filter portion is including setting up the multistage steel filter core in the cavity, be provided with multistage filter screen on the multistage steel filter core lateral wall, multistage filter screen encloses the outside of closing at multistage steel filter core, multistage oil circuit chamber has been seted up in the multistage steel filter core, multistage filter screen covers the inlet opening department in multistage oil circuit chamber, the liquid outlet and the cavity intercommunication in multistage oil circuit chamber, multistage steel filter core outside upper end and shells inner wall butt, be provided with multistage sealing washer between multistage steel filter core and the casing.

Through adopting above-mentioned technical scheme, hydraulic oil gets into the cavity behind the primary filter portion, because multistage steel filter core lateral wall upper end and shells inner wall butt, and still be equipped with multistage sealing washer between multistage steel filter core and the casing, hydraulic oil can only get into multistage oil circuit chamber through multistage filter screen, and multistage filter screen carries out the secondary filter to hydraulic oil.

Optionally, the sealing portion includes an upper oil block disposed on the upper portion of the cavity and abutted against the inner wall of the housing, and a lower oil block disposed on the lower portion of the cavity and abutted against the inner wall of the housing.

By adopting the technical scheme, the upper oil blocking block seals the upper part of the cavity, the lower oil blocking block seals the lower part of the cavity, the shell is enabled to be oil-tight, impurities left after hydraulic oil is filtered can be conveniently cleaned by taking out the lower oil blocking block, and the service life of the multistage hydraulic filter is prolonged.

Optionally, the upper oil block is provided with an end table, the end table is located outside the casing, and a sealing gasket is arranged between the end table and the casing.

Through adopting above-mentioned technical scheme, sealed the pad seals up the casing better, and the setting up of end platform makes oil shutoff piece dismantle more easily and install, is convenient for clear up the cavity is inside.

Optionally, the upper oil blocking block is provided with an oil blocking cavity, and an oil blocking screw is arranged in the oil blocking cavity.

Through adopting above-mentioned technical scheme, the oil blocking screw is easily installed and is dismantled, is convenient for clear up the casing inner chamber.

Optionally, the plurality of the multistage filtering parts are provided.

Through adopting above-mentioned technical scheme, make multistage filter can realize multistage filtration, make the filter effect to hydraulic oil better.

Optionally, the cavity is an inverted trapezoid structure with a wide upper part and a narrow lower part.

Through adopting above-mentioned technical scheme, cavity upper portion is wider than the cavity lower part, is convenient for the inside elementary filter house of cavity and the dismantlement and the change of multistage filter house, prolongs multistage hydraulic filter's life.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the multistage filtering of the hydraulic oil is realized, so that the filtering effect is better;

2. the interior of the filter is convenient to clean, and the service life of the filter can be prolonged by regularly cleaning the interior of the filter;

3. the cavity in the shell is communicated up and down, and the primary steel filter element and the multistage steel filter element are of an integral structure, so that the assembly, disassembly and replacement are convenient;

4. the primary filter element and the multistage filter element are both steel structures, so that the filter can bear higher pressure.

Drawings

Fig. 1 is a schematic view of a multistage hydraulic filter structure in embodiment 1.

FIG. 2 is a schematic view of a multistage hydraulic filter structure in embodiment 2.

Description of reference numerals: 1. a housing; 11. an oil inlet; 12. an oil outlet; 13. a cavity; 2. a primary filtration section; 21. a primary steel filter element; 22. a primary filter screen; 23. a primary oil circuit cavity; 24. a primary oil blocking screw; 25. a primary seal ring; 3. a multistage filtration section; 31. a multi-stage steel filter element; 32. a multi-stage filter screen; 33. a multi-stage oil circuit cavity; 34. a multi-stage seal ring; 4. a sealing part; 41. an oil plugging block is arranged; 411. an end table; 412. blocking an oil cavity; 42. lower oil plugging blocks; 43. a gasket; 44. oil blocking screw.

Detailed Description

The present application is described in further detail below with reference to figures 1-2.

The embodiment of the application discloses multistage hydraulic filter.

Example 1

Referring to fig. 1, the multistage hydraulic filter comprises a shell 1, an oil inlet 11 is formed in the position, close to the bottom, of the side wall of the shell 1, an oil outlet 12 is formed in the position, close to the top, of the side wall of the shell 1, a cavity 13 which is wide at the top and narrow at the bottom is formed in the shell 1, the cavity 13 is communicated with the oil inlet 11 and the oil outlet 12, and a primary filtering part 2 and a multistage filtering part 3 are arranged in the cavity 13 from bottom to top. The multistage hydraulic filter further comprises a seal 4 sealing the cavity 13. Hydraulic oil gets into cavity 13 from oil inlet 11, and hydraulic oil flows out from oil-out 12 after 2 and the multistage filter portion 3 of elementary filter portion, and 2 and the multistage filter portion 3 of elementary filter portion filter hydraulic oil. The width of the upper part of the cavity 13 is larger than that of the lower part of the cavity 13, so that the primary filter part 2 and the multistage filter part 3 which are positioned in the cavity 13 can be conveniently detached and replaced, and the service life of the multistage hydraulic filter is prolonged.

Referring to fig. 1, the primary filter part 2 includes a primary steel filter element 21 in the cavity 13, a primary filter screen 22 is fixedly connected to the side wall of the primary steel filter element 21, the primary filter screen 22 surrounds the outer side of the primary steel filter element 21, a primary oil path cavity 23 is formed in the primary steel filter element 21, the primary filter screen 22 covers the liquid inlet of the primary oil path cavity 23, the liquid outlet of the primary oil path cavity 23 is communicated with the cavity 13, and a primary oil blocking screw 24 is connected to the lower end of the primary steel filter element 21 in a threaded manner. The upper end of the outer side of the primary steel filter element 21 is abutted against the inner wall of the shell 1, and a primary sealing ring 25 is arranged between the primary steel filter element 21 and the shell 1. After hydraulic oil got into cavity 13 from oil inlet 11, because elementary steel filter core 21 and elementary stifled separation of oil screw 24, hydraulic oil can only get into elementary oil circuit chamber 23 through elementary filter screen 22, realized the first filtration to hydraulic oil, sealed effect has been strengthened to elementary sealing washer 25, and elementary stifled oil screw 24 is easy to assemble and dismantles, is convenient for clear up 2 insides of elementary filter part.

Referring to fig. 1, multistage filter includes multistage steel filter core 31 in cavity 13, and fixedly connected with multistage filter screen 32 on the multistage steel filter core 31 lateral wall, multistage filter screen 32 encloses the outside of closing at multistage steel filter core 31, has seted up multistage oil circuit chamber 33 in the multistage steel filter core 31, and multistage filter screen 32 covers the inlet port department at multistage oil circuit chamber 33, the liquid outlet and the cavity 13 intercommunication in multistage oil circuit chamber 33, multistage steel filter core 31 outside upper end and 1 inner wall butt of casing have placed multistage sealing washer 34 between multistage steel filter core 31 and the casing 1. After primary filtration, hydraulic oil can only enter the multistage oil circuit cavity 33 through the multistage filter screen 32 due to the obstruction of the multistage steel filter element and the multistage sealing ring 34, and secondary filtration of the hydraulic oil is realized.

Referring to fig. 1, the seal portion 4 includes an upper oil blocking block 41 and a lower oil blocking block 42. The upper oil block 41 is provided with an end table 411, the end table 411 is positioned outside the casing 1, and a sealing gasket 43 is arranged between the end table 411 and the casing 1. The upper oil plugging block 41 seals the upper part of the cavity 13, the lower oil plugging block 42 seals the lower part of the cavity 13, so that the shell 1 is free from oil leakage, the lower oil plugging block 42 can be taken out to conveniently clean impurities left after hydraulic oil is filtered, and the service life of the multistage hydraulic filter is prolonged. Go up oil shutoff piece 41 and be equipped with end platform 411, make oil shutoff piece 41 more easily dismantle, be convenient for clear up the cavity 13 is inside. The gasket 43 provides a better seal against the housing 1.

The implementation principle of the embodiment 1 is as follows: hydraulic oil enters the cavity 13 from an oil inlet 11 of the shell 1 close to the bottom, due to the obstruction of the primary steel filter element 21 and the primary seal ring 25, the hydraulic oil can only enter the primary oil circuit cavity 23 inside the primary steel filter element 21 through the primary filter screen 22, primary filtration of the hydraulic oil is completed, the hydraulic oil after primary filtration enters the cavity 13 again, due to the obstruction of the multistage steel filter elements 31 and the multistage seal rings 34, the hydraulic oil can only enter the multistage oil circuit cavity 33 inside the multistage steel filter elements 31 through the multistage filter screens 32, secondary filtration of the hydraulic oil is completed, the filtered hydraulic oil enters the cavity 13 and is discharged through an oil outlet 12 communicated with the cavity 13 so as to be used by a hydraulic pump.

Go up oil blockage piece 41 and lower oil blockage piece 42 and seal up cavity 13, go up oil blockage piece 41 and convenient the dismantlement of oil blockage piece 42 down, be convenient for clear up cavity 13 is inside, prolong multistage hydraulic filter's life.

Example 2

Referring to fig. 2, the present embodiment is different from embodiment 1 in that two multi-stage filter portions 3 are provided, an oil blocking chamber 412 is formed in the upper oil blocking block 41, and an oil blocking screw 44 is disposed in the oil blocking chamber 412.

The implementation principle of the embodiment 2 is as follows: the hydraulic oil is filtered by the two multi-stage filtering parts 3, so that a better filtering effect is obtained. The oil blocking screw 44 is arranged, so that the cavity 13 can be cleaned by unscrewing the oil blocking screw 44 without detaching the oil blocking block 41, and the cavity 13 can be cleaned more conveniently and quickly.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a multistage hydraulic filter, includes casing (1), casing (1) lateral wall is close to the bottom position and has seted up oil inlet (11), casing (1) lateral wall is close to the top position and has seted up oil-out (12), cavity (13) have been seted up in casing (1), oil inlet (11) and oil-out (12) are linked together its characterized in that with cavity (13): the cavity (13) is internally provided with a primary filtering part (2), a multi-stage filtering part (3) and a sealing part (4).

2. The multi-stage hydraulic filter of claim 1, wherein: elementary filter portion (2) is including setting up elementary steel filter core (21) in cavity (13), be provided with elementary filter screen (22) on elementary steel filter core (21) lateral wall, elementary filter screen (22) enclose the outside of closing at elementary steel filter core (21), elementary oil circuit chamber (23) have been seted up in elementary steel filter core (21), elementary filter screen (22) cover the inlet opening department in elementary oil circuit chamber (23), the liquid outlet and cavity (13) the intercommunication in elementary oil circuit chamber (23), elementary steel filter core (21) lower extreme is connected with elementary stifled oil screw (24), elementary steel filter core (21) outside upper end and casing (1) inner wall butt, be provided with primary sealing washer (25) between elementary steel filter core (21) and casing (1).

3. The multi-stage hydraulic filter of claim 1, wherein: multistage filter portion (3) are including setting up multistage steel filter core (31) in cavity (13), be provided with multistage filter screen (32) on multistage steel filter core (31) lateral wall, multistage filter screen (32) enclose the outside of closing at multistage steel filter core (31), multistage oil circuit chamber (33) have been seted up in multistage steel filter core (31), multistage filter screen (32) cover the inlet opening department in multistage oil circuit chamber (33), the liquid outlet and cavity (13) the intercommunication in multistage oil circuit chamber (33), multistage steel filter core (31) outside upper end and casing (1) inner wall butt, be provided with multistage sealing washer (34) between multistage steel filter core (31) and casing (1).

4. The multi-stage hydraulic filter of claim 1, wherein: the sealing part (4) comprises an upper oil plugging block (41) which is arranged at the upper part of the cavity (13) and is abutted against the inner wall of the shell (1) and a lower oil plugging block (42) which is arranged at the lower part of the cavity (13) and is abutted against the inner wall of the shell (1).

5. The multi-stage hydraulic filter of claim 4, wherein: go up oil shutoff piece (41) and be provided with end platform (411), end platform (411) are located the casing (1) outside, be provided with sealed pad (43) between end platform (411) and casing (1).

6. The multi-stage hydraulic filter of claim 4, wherein: an oil blocking cavity (412) is formed in the upper oil blocking block (41), and an oil blocking screw (44) is arranged in the oil blocking cavity (412).

7. The multi-stage hydraulic filter of claim 3, wherein: the multistage filtering part (3) is provided in a plurality.

8. The multi-stage hydraulic filter of claim 5 or 6, wherein: the cavity (13) is of an inverted trapezoidal structure with a wide upper part and a narrow lower part.