CN202900847U

CN202900847U - Oil absorption filter device

Info

Publication number: CN202900847U
Application number: CN 201220566406
Authority: CN
Inventors: 李福生; 张庆彬
Original assignee: Sany Heavy Industry Co Ltd
Current assignee: Sany Heavy Industry Co Ltd
Priority date: 2012-10-31
Filing date: 2012-10-31
Publication date: 2013-04-24
Anticipated expiration: 2022-10-31

Abstract

The utility model discloses an oil absorption filter device, and belongs to the field of assemblies of a hydraulic system. The oil absorption filter device comprises an oil tank, an oil suction port and a filter. The oil suction port is arranged in the oil tank, an oil inlet of the filter is connected with an oil return line of the oil tank, and an oil outlet of the filter is placed inside the oil tank. Oil enters the filter from the oil inlet of the filter to be filtered, and then flows into the oil tank from the oil outlet of the filter. The filter is of a cylindrical shape and comprises an outer cylinder and an inner cylinder which is sleeved inside the outer cylinder. A filter core is arranged on the inner cylinder, and the inner cylinder is pressed tightly and fixedly arranged inside the outer cylinder through an elastic part. The oil absorption filter device has the advantages that the risks of a traditional oil absorption filter after the traditional oil absorption filter is blocked up are eliminated, and thereby the cavitation caused by the fact that the traditional oil absorption filter is blocked up is avoided, and meanwhile, the impact of return oil on the oil of the oil tank is reduced, full filtering of the return oil of the system is achieved, and dismounting, washing and replacing of the filter core are convenient.

Description

A kind of absorbing and filtering device

Technical field

The utility model relates to the assembly of hydraulic system, relates in particular to a kind of absorbing and filtering device.

Background technique

Hydraulic element particularly pump valve etc. belong to precision part, and cleanliness of hydraulic oil is had relatively high expectations.In case the wear debris of element is sneaked into system, the safety and reliability of system works will be affected greatly.Consider that for the protection to oil hydraulic pump traditional method generally takes the fuel tank inlet port to the technological scheme that oil absorption filter is installed between the pumping hole.The shortcoming of this scheme is: 1, because there is the limitation of contamination capacity in filter itself, in case its conveyance capacity descends, the oil suction negative pressure of generation easily causes inhaling empty, cause that system creeps or shake, moreover, inhaling sky also will make element produce cavitation erosion, the working life of significantly reducing the hydraulic system element.2, because oil return filter precision General Requirements is higher, the back pressure of generation is larger, so be difficult to accomplish the full filter design of oil return, draining, the result often draining such as motor, valve class directly flows back to fuel tank without filtering, and becomes the major hidden danger that affects security of system.

Summary of the invention

For the defective that the oil return filter mode of existing hydraulic system exists, now providing a kind of can increase oil cleanliness, eliminates the oil suction negative pressure, avoids producing the absorbing and filtering device of cavitation erosion, and its concrete technological scheme that adopts of dealing with problems is:

A kind of absorbing and filtering device comprises fuel tank, inlet port, filter, and wherein, described inlet port is arranged on the described fuel tank, and the fluid entrance of described filter is connected with the return line of described fuel tank, and the fluid outlet of described filter is positioned at described fuel tank internal; Fluid outlet from described filter after fluid enters described filter and filters from the fluid entrance of described filter flows into fuel tank;

Described filter is tubular, comprises urceolus and is sheathed on the interior inner core of described urceolus, and described inner core is provided with filter core, and described inner core compresses and be positioned at described urceolus inside by an elastic member.

Preferably, described elastic member is spring.

Preferably, described filter comprises inner core base and head cover plate;

Joint with described urceolus on described fuel tank offers a through hole, and the described through hole of described head cover plate capping also is connected with described urceolus, and described inner core base is connected in the lower end of described urceolus, and described inner core places between described inner core base and the described head cover plate;

Described elastic member is arranged between the upper end of described head cover plate and inner core, and described fluid outlet is positioned at the center of described inner core base.

Preferably, also comprise a positioning seat, described positioning seat is sheathed between described elastic member and the described head cover plate.

Preferably, described filter is vertically connected at described inner wall of oil tank end face, and described fluid entrance is mainly formed by the through hole on described urceolus barrel top.

Preferably, described filter level connection joint is in described inner wall of oil tank side, and described fluid entrance is mainly formed by the through hole at described head cover plate middle part.

The beneficial effect of technique scheme is:

1, compare conventional solution, inlet port is directly drawn good after filtration oil from fuel tank, eliminated the possibility that produces very large oil suction negative pressure, has avoided the hydraulic system component to cavitate.

2, because oil return generally wishes to have certain back pressure, so can allow to select higher precision filter, more tiny particle in the interception fluid improves the turbidity test after fluid filters.

When 3, fuel tank is flowed back in the hydraulic system oil return, because oil return flows into fuel tank again through filter first, improved the impact of oil return to fuel tank fluid, the precipitation and the air that are conducive to oil return are separated out.

4, use holddown spring to compress the inner core of cylindrical filter, namely filter core with respect to traditional filter core mounting type, is very easy to dismounting and the replacing of filter core.

5, realized the full filtration of system oil return.

Description of drawings

In order to be illustrated more clearly in the technical solution of the utility model, the below will do simple introduction to the accompanying drawing of required use among the embodiment, apparent, accompanying drawing in the following describes only is an embodiment of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the vertical embodiment's who arranges of filter of a kind of absorbing and filtering device of the utility model schematic representation;

Fig. 2 is the horizontally disposed embodiment's of filter of a kind of absorbing and filtering device of the utility model schematic representation.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, but not as restriction of the present utility model.

As shown in Figure 1 and Figure 2, the embodiment of a kind of absorbing and filtering device of the utility model, comprise fuel tank 1, inlet port 2, filter 3, wherein, inlet port 2 is arranged on the fuel tank 1, the fluid entrance 31 of filter 3 is connected with the return line 11 of fuel tank 1, and the fluid outlet 32 of filter 3 is positioned at fuel tank 1 inside; Fluid outlet 32 from filter 3 after fluid enters filter 3 and filters from the fluid entrance 31 of filter 3 flows into fuel tanks 1.Wherein, filter 3 is tubular, comprises urceolus 33 and the inner core 34 that is sheathed in the urceolus 33, and inner core 34 is provided with filter core, and inner core 34 compresses and be fixed on urceolus 33 inside by an elastic member 35.

The principle of technique scheme is, fuel tank 1 is front to be filtered by filter 3 first hydraulic oil flowing back to, and then flows back to fuel tank 1, and so, the hydraulic oil that inlet port 2 is drawn from fuel tank 1 has been the hydraulic oil through the cleaning after the filtration.Both eliminate inlet port negative pressure hidden danger, and can increase the back pressure of the hydraulic oil of return filter, improved the filter precision of filter core.1 first by filter 1, the step that enters again fuel tank 1 has reduced the impact of oil return to fuel tank 1 fluid to hydraulic oil, is conducive to oil return precipitation and air and separates out before entering fuel tank.In addition, practical elastic member 35 is filter inner core 34, and namely filter core is pressed on the method in the filter 3, is threadedly connected to the mode of base than traditional filter core, is very easy to dismounting, the cleaning of filter core and changes.

On the technique scheme basis, further, filter comprises inner core base 36 and head cover plate 37; The joint with urceolus 33 on fuel tank 1 offers a through hole 12, and head cover plate 37 capping through holes 12 also are connected with urceolus 33, and inner core base 36 is connected in the lower end of urceolus 33, and inner core 34 places between inner core base 36 and the head cover plate 37; Elastic member 35 is arranged between the upper end of head cover plate 37 and inner core 34, and fluid outlet 32 is positioned at the center of inner core base 36

That shown in Figure 1 is the embodiment of a kind of absorbing and filtering device of the utility model when filter 3 vertically arranges, and its middle filtrator 3 is vertically connected at fuel tank 1 inwall end face, and fluid entrance 32 can be mainly formed by the through hole 38 on urceolus 33 barrel tops.

That shown in Figure 2 is the embodiment of a kind of absorbing and filtering device of the utility model when filter 3 is horizontally disposed with, and wherein, filter 3 level connection joints are in fuel tank 1 inwall side, and fluid entrance 31 can be mainly formed by the through hole 39 at head cover plate 37 middle parts.Under this mode of execution, a positioning seat 4 also can be set, positioning seat 4 is sheathed between elastic member 35 and the head cover plate 37, to strengthen the positioning action of 35 pairs of inner cores 34 of elastic member.

On the technique scheme basis, further elastic member 35 can be spring, also can be other elastic element that is not corroded by fluid.

The above only is the utility model preferred embodiment; be not so limit mode of execution of the present utility model and protection domain; to those skilled in the art; should recognize that being equal to that all utilization the utility model specifications and diagramatic content done replace and the resulting scheme of apparent variation, all should be included in the protection domain of the present utility model.

Claims

1. absorbing and filtering device, comprise fuel tank, inlet port, filter, it is characterized in that described inlet port is arranged on the described fuel tank, the fluid entrance of described filter is connected with the return line of described fuel tank, and the fluid outlet of described filter is positioned at described fuel tank internal; Fluid outlet from described filter after fluid enters described filter and filters from the entrance of described filter flows into fuel tank;

Described filter is tubular, comprises urceolus and is sheathed on the interior inner core of described urceolus, and described inner core is provided with filter core, and described inner core compresses and be fixed on described urceolus inside by an elastic member.

2. the absorbing and filtering device described in according to claim 1 is characterized in that described elastic member is spring.

3. the absorbing and filtering device described in according to claim 1 is characterized in that described filter comprises inner core base and head cover plate;

4. the absorbing and filtering device described in according to claim 3 is characterized in that also comprise a positioning seat, described positioning seat is sheathed between described elastic member and the described head cover plate.

5. absorbing and filtering device as described in claim 3 is characterized in that described filter is vertically connected at described inner wall of oil tank end face, and described fluid entrance is mainly formed by the through hole on described urceolus barrel top.

6. absorbing and filtering device as claimed in claim 3 is characterized in that, described filter level connection joint is in described inner wall of oil tank side, and described fluid entrance is mainly formed by the through hole at described head cover plate middle part.