CN209370051U - A kind of high-pressure gear pump sealing apparatus - Google Patents

Abstract

The utility model discloses a kind of high-pressure gear pump sealing apparatus, including high pressure sealing blend stop and gasket, the gasket is " W " shape, the high pressure sealing blend stop and gasket cooperate and high pressure sealing blend stop is by gasket semi-surrounding, the cross section of the high pressure sealing blend stop is L shape, and the inside of high pressure sealing blend stop is arranged in the gasket.The high-pressure gear pump sealing apparatus of the utility model including protecting the axially and radially end face of gasket, avoids high-pressure medium oil from constantly impacting to gasket and gasket damage corrosion is caused even to be failed by the high pressure sealing blend stop of setting L shape；The cooperation of first convex block, the second convex block, the first inclined-plane and the second inclined-plane improves the density of gasket, gap is reduced, to improve sealing effect；Flange and groove cooperate, and directly connect high pressure sealing blend stop with gasket, avoid disengaging of scattering when installation, improve working efficiency.

Description

A kind of high-pressure gear pump sealing apparatus

Technical field

The utility model belongs to gear pump technical field, in particular to a kind of high-pressure gear pump sealing apparatus.

Background technique

The driving gear and driven gear that gear pump generally includes pumping cylinder and is contained in the pumping cylinder, gear pump It is that swept volume changes and movement is to convey liquid or be allowed to the drum pump being pressurized by being formed by between pumping cylinder and meshing gear. Form two enclosure spaces by two gears, the pump housing and front and rear covers, when gear rotation, the volume in the space for the side that is out of gear from It is small to become larger, negative pressure is formed, is drawn liquid into, the volume in the space of gear engagement side forms positive pressure from becoming smaller greatly, and liquid is squeezed Enter in pipeline, suction chamber and discharge chamber are that the path of contact of two gears is leaned on to separate, and the pressure of the outlet of gear pump is complete All dependent on the size of resistance at pump discharge.Gear pump have structure is simple, size is small, light-weight, easily manufactured, price just Preferably, the features such as suction capacity is good, contamination resistance is strong.

Floating side plate is one of the core component in gear pump, and there are important influence in service life and volumetric efficiency to pump.Cause This, is even more important to the sealing of floating side plate.Seal washer is equipped between floating side plate and pumping cylinder, existing seal washer is transversal Face is generally rectangular, can be rectangle in the inside of seal washer setting cross section to improve the sealing effect of seal washer Blend stop, this blend stop can only carry out unilateral protection to seal washer, in order to not influence installation and sealing effect, the thickness of usual blend stop Degree can be less than seal washer, and high-pressure medium oil constantly will lead to seal washer damage corrosion to seal washer impact and even fail, Gear pump is caused to leak.

Utility model content

The utility model the above-mentioned prior art there are aiming at the problem that, a kind of high-pressure gear pump sealing apparatus is provided.

The utility model is realized by following technological means solves above-mentioned technical problem:

A kind of high-pressure gear pump sealing apparatus, including high pressure sealing blend stop and gasket, the gasket are " W " shape, institute High pressure sealing blend stop and gasket cooperation and high pressure sealing blend stop are stated by gasket semi-surrounding, the high pressure sealing blend stop it is transversal Face is L shape, and the inside of high pressure sealing blend stop is arranged in the gasket.

As a further improvement of the utility model, the high pressure sealing blend stop include orthogonal axial protection walls and Radial protection walls, the height of the axial direction protection walls are less than the height of gasket, and the width of the radial direction protection walls is less than sealing The width of pad.

The end of the axial protection walls is equipped with the first inclined-plane as a further improvement of the utility model, and described first Inclined-plane and the outer wall angle of axial protection walls are α, and 90 ° of α <, the mating surface of the gasket and axial protection walls is equipped with and the First convex block of one inclined-plane adaptation.

30 ° of 45 ° of < α < as a further improvement of the utility model,.

The end of the radial protection walls is equipped with the second inclined-plane as a further improvement of the utility model, and described second The outer wall angle of inclined-plane radial direction protection walls is β, and 90 ° of β <, the mating surface of the gasket and radial protection walls is equipped with and second Second convex block of inclined-plane adaptation.

45 ° of < of 30 ° of < β as a further improvement of the utility model,.

The inner wall of the radial protection walls is equipped with flange as a further improvement of the utility model, the flange It is circular bulb that head, which is equipped with cross section, and the gasket and the mating surface of radial protection walls with flange equipped with being adapted to Groove.

The utility model has the following beneficial effects:

(1) the high-pressure gear pump sealing apparatus of the utility model passes through the high pressure sealing blend stop of setting L shape, by gasket Axially and radially end face protection including, avoid high-pressure medium oil constantly to gasket impact and cause gasket damage corrosion very To failure；

(2) the high-pressure gear pump sealing apparatus of the utility model by setting the first convex block and the second convex block and respectively with The first inclined-plane and the second inclined-plane of first convex block and the cooperation of the second convex block, the density of Lai Tigao gasket reduce gap, to mention High sealing effect；

(3) the high-pressure gear pump sealing apparatus of the utility model is cooperated by the flange and groove for being provided with bulb, High pressure sealing blend stop is connect with gasket directly, avoids disengaging of scattering when installation, improves working efficiency.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model sealing device；

Fig. 2 is the connection schematic diagram of the utility model sealing device and floating side plate；

Fig. 3 is the connection schematic diagram of the utility model sealing blend stop and gasket.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to The range of the utility model protection.

Embodiment

As shown in Figures 1 to 3, a kind of high-pressure gear pump sealing apparatus, including high pressure sealing blend stop 10 and gasket 20, it is described Gasket 20 is " W " shape, and the high pressure sealing blend stop 10 cooperates with gasket 20 and high pressure sealing blend stop 10 is by gasket 20 half It surrounds, the cross section of the high pressure sealing blend stop 10 is L shape, and the gasket 20 is arranged in high pressure sealing blend stop 10 Side.

As shown in Figure 2, high pressure sealing blend stop 10 and gasket 20 are mounted in the seal groove of floating side plate 1, floating side The end face A of plate 1 is radial end face, and directly with the connection face contact of the pump housing, the end face 8 of floating side plate 1 is axial end face, gear When pump work, the pressure to gasket 20 is mainly radial pressure, and high pressure sealing blend stop 10 is by the axial direction and diameter of gasket 20 To including the protection of end face, high-pressure medium oil is avoided constantly to impact to gasket 20 and the damage of gasket 20 corrosion is caused even to be lost Effect.

Further, as shown in Figures 2 and 3, the high pressure sealing blend stop 10 includes axial protection walls 11 and radial protection walls 12, the axial direction protection walls 11 and radial protection walls 12 are mutually perpendicular to, and the height of the axial direction protection walls 11 is less than gasket 20 Height, it is described radial direction protection walls 12 width be less than gasket 20 width；High pressure sealing blend stop 10 is whole with gasket 20 Body height can be higher than the seal groove of floating side plate 1, when installation, need to compress gasket 20 to reach sealing effect, due to height The protective action of means of press seals blend stop 10, the thickness of gasket 20 can become smaller in installation process, so the height of axial protection walls 11 Height less than gasket 20 can prevent from being squeezed and deformed damage when compression, and in installation process gasket 20 can generate it is axial and Radial deformation further increases sealing effect to fill the gap of itself and 10 both ends of high pressure sealing blend stop.

Further, as shown in figure 3, the end of the axial direction protection walls 11 is equipped with the first inclined-plane 111, first inclined-plane 111 and the outer wall angles of axial protection walls 11 are α, 90 ° of α <, are set in the gasket 20 and the mating surface of axial direction protection walls 11 There is the first convex block 21 being adapted to the first inclined-plane 111；When hitting assembly, axial protection walls 11 can be squeezed to floating side plate 1 The slot bottom of mounting groove moves, and after the first convex block 21 is arranged, axial protection walls 11 can squeeze gasket 20 when moving, and improves gasket 20 radial density, to improve sealing effect, being provided with for the first inclined-plane 111 is conducive to the axial movement of protection walls 11 extruding, subtracts Few gap.

Further, 30 ° of 45 ° of < α <；α angle value is excessive, and resistance is big between the first inclined-plane 111 and the first convex block 21, no It moves and squeezes conducive to axial protection walls 11, α angle value is too small, and 111 thickness of the first inclined-plane is small, and squeezing effect is poor, improves sealing effect Fruit is weak.

Further, as shown in figure 3, the end of the radial direction protection walls 12 is equipped with the second inclined-plane 121, second inclined-plane The outer wall angle of 121 radial protection walls 12 is β, and 90 ° of β <, the gasket 20 and the mating surface of radial protection walls 12 are equipped with The second convex block 22 being adapted to the second inclined-plane 121；When hitting assembly, peace that radial protection walls 12 can be squeezed to floating side plate 1 The slot bottom of tankage moves, and after the second convex block 22 is arranged, radial protection walls 12 can squeeze gasket 20 when moving, and gasket 20 can be to It is overflowed outside the mounting groove of floating side plate 1, and then improves seal thickness and density, improve sealing effect, the setting on the second inclined-plane 121 Be conducive to radial protection walls 12 and squeeze gasket 20.

Further, 45 ° of < of 30 ° of < β.β angle value is excessive, and the second convex block 22 is answered by the axial direction on the second inclined-plane 121 Power is big, is easily damaged gasket 20, and β angle value is too small, and 121 span of the second inclined-plane is big, and squeezing effect is dispersed, and causes to improve close It is weak to seal effect.

Further, as shown in figure 3, the inner wall of the radial direction protection walls 12 is equipped with flange 13, the head of the flange 13 It is circular bulb 131 that portion, which is equipped with cross section, and the mating surface of the gasket 20 and radial protection walls 12 is equipped with and flange The groove 23 of 13 adaptations；In the assembling process of sealing device, need to be embedded in after overlapping high pressure sealing blend stop 10 and gasket 20 The mounting groove of floating side plate 1, since high pressure sealing blend stop 10 and gasket 20 are two components being kept completely separate, the process of insertion In be easy to scatter and be detached from the mounting groove of floating side plate 1, cause working efficiency to reduce, be provided with the flange 13 of bulb 131 Afterwards, directly high pressure sealing blend stop 10 can be connect with the cooperation of flange 13 by groove 23 with gasket 20, avoids dissipating when installation It absolves from flange 13 can squeeze gasket 20 to two sides when improving working efficiency, and installing, and reduce two sides gap, improve Sealing effect.

It should be noted that, in this document, such as first and second or the like relational terms are used merely to one if it exists A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in the process, method, article or apparatus that includes the element.

Above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although referring to aforementioned reality Example is applied the utility model is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these are repaired Change or replaces, the spirit and scope for various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution.

Claims (7)

1. a kind of high-pressure gear pump sealing apparatus, including high pressure sealing blend stop (10) and gasket (20), the gasket (20) For " W " shape, which is characterized in that the high pressure sealing blend stop (10) cooperates with gasket (20) and high pressure sealing blend stop (10) will be close Packing (20) semi-surrounding, the cross section of the high pressure sealing blend stop (10) are L shape, and the gasket (20) is arranged in high densification The inside of block item (10).

2. a kind of high-pressure gear pump sealing apparatus according to claim 1, which is characterized in that the high pressure sealing blend stop It (10) include orthogonal axial protection walls (11) and radial protection walls (12), the height of the axial direction protection walls (11) is less than The width of the height of gasket (20), the radial direction protection walls (12) is less than the width of gasket (20).

3. a kind of high-pressure gear pump sealing apparatus according to claim 2, which is characterized in that the axial direction protection walls (11) End be equipped with the first inclined-plane (111), the outer wall angle of first inclined-plane (111) and axial protection walls (11) is α, α < 90 °, the gasket (20) is equipped with the first convex block being adapted to the first inclined-plane (111) with the mating surface of axial protection walls (11) (21).

4. a kind of high-pressure gear pump sealing apparatus according to claim 3, which is characterized in that 30 ° of 45 ° of < α <.

5. a kind of high-pressure gear pump sealing apparatus according to claim 2, which is characterized in that the radial direction protection walls (12) End be equipped with the second inclined-plane (121), the outer wall angle of the radial protection walls (12) of second inclined-plane (121) is β, 90 ° of β <, The gasket (20) is equipped with the second convex block being adapted to the second inclined-plane (121) with the mating surface of radial protection walls (12) (22).

6. a kind of high-pressure gear pump sealing apparatus according to claim 5, which is characterized in that 45 ° of < of 30 ° of < β.

7. a kind of high-pressure gear pump sealing apparatus according to claim 2, which is characterized in that the radial direction protection walls (12) Inner wall be equipped with flange (13), it is circular bulb (131), the sealing that the head of the flange (13), which is equipped with cross section, Pad (20) is equipped with the groove (23) being adapted to flange (13) with the mating surface of radial protection walls (12).