CN209340217U - Decompression lid mechanism for fluid system - Google Patents

Abstract

The utility model discloses the decompression lid mechanisms for fluid system, including the decompression lid being set on Pulp pump axis body and rear backplate, it further include screw, the outer ring coaxial with decompression lid, sealing ring I is provided on contact surface between decompression lid and rear backplate, the centre bore of outer ring is the first hole, the second hole ... and the (n+1)th hole；The outer diameter of decompression lid is first external diameter section, second external diameter section ... and the n-th outer diameter section；The n-th sealing ring is provided between side of n-th of outer diameter section far from rear backplate and the bottom hole in n-th of hole, side in rear backplate close to decompression lid is provided with support ring, support ring is located in the n-th hole, sealing ring II is provided between support ring and the hole wall in the n-th hole, screw is threadedly coupled after passing through outer ring, sealing ring II with support ring.In the utility model, the sealing surface between decompression lid and rear backplate is protected by newly-increased outer ring, avoids sealing surface from directly contacting with slurry fluid and wears.

Description

Decompression lid mechanism for fluid system

Technical field

The utility model relates to pump housing fields, in particular to are used for the decompression lid mechanism of fluid system.

Background technique

Pulp pump belongs to centrifugal pump from working principle, refers to the impeller by by centrifugal force, that is, pumping in concept The effect of rotation make a kind of increased machinery of solid, liquid blending agent energy, be a kind of kinetic energy for converting electric energy to medium and The equipment of potential energy.Pulp pump is primarily adapted for use in the industry fields such as mine, power plant, dredging, metallurgy, chemical industry, building materials and petroleum.Slurry The title of pump is a kind of centrifugal pump divided from the angle of pumped (conveying) medium.

Conventional Pulp pump decompression lid with rear backplate seal face structure as shown in Figure 1, mainly by decompression lid, sealing ring and after Backplate composition.Sealing ring is O-ring seal, mounting means be mainly to process one with the sealing surface of rear backplate in decompression lid Sealing ring, is then placed in annular groove by the annular groove for placing sealing ring.What it is due to Pulp pump conveying is all containing particle, abrasion The stronger medium of property, and rear backplate then belongs to one in the big vulnerable part of Pulp pump six.Therefore it processes and puts in rear backplate The sulculus of sealing ring is set, this can not only reduce the intensity of rear backplate.And Pulp pump conveying is all the stronger medium of abrasiveness, Medium can constantly wear the flow passage components such as decompression lid, rear backplate, and conventional Pulp pump decompression lid and rear backplate are sealed with sealing ring When, since the sealing surface of decompression lid and rear backplate contact is small, this easilys lead to sealing surface and wears away under the action of medium, from And effective Sealing period is not achieved, influence overall operation performance and the service life of pump.

Summary of the invention

The purpose of this utility model is that: the decompression lid mechanism for fluid system is provided, solves existing decompression The problem that the wear resistance of the sealing structure of lid and rear backplate composition is poor, effective Sealing period is short.Therefore the utility model is set The decompression lid mechanism for fluid system of meter by the structure of sealing surface between change decompression lid and rear backplate, and is arranged outer Ring protects sealing surface, and increases sealed pathway, improves decompression and covers the wear-resistant of the sealing structure formed with rear backplate Damage property ensure that effective Sealing period meets pump whole projected life.

The technical solution adopted in the utility model is as follows:

For the decompression lid mechanism of fluid system, including the decompression lid being set on Pulp pump axis body and rear backplate, also Coaxial outer ring is covered including screw, with decompression, is provided with sealing ring I on the contact surface between the decompression lid and rear backplate, The centre bore of the outer ring is n sections of not isometrical holes, is connected to along the axis of axis body as separate rear backplate is followed successively by and coaxial First hole, the second hole ... and the (n+1)th hole, and the aperture in the first hole to the (n+1)th hole is gradually reduced with far from rear backplate；

The outer diameter of the decompression lid is n section not isometrical outer diameters, is followed successively by the with separate rear backplate along the axis of axis body One outer diameter section, second external diameter section ... and the n-th outer diameter section, each outer diameter section are gradually reduced with separate rear backplate, and the n-th hole Aperture is consistent with the n-th outer diameter section, and works in coordination；

It is provided with the n-th sealing ring between side of n-th of outer diameter section far from rear backplate and the bottom hole in n-th of hole, it is described Side in rear backplate close to decompression lid is provided with support ring, and the outer diameter of the support ring is consistent with the aperture in the n-th hole, and supports Ring is located in the n-th hole, and sealing ring II is provided between the outer wall of support ring and the hole wall in the n-th hole, and the screw sequentially passes through It is threadedly coupled after outer ring and sealing ring II with support ring；

The two sides of the sealing ring I are contacted with decompression lid and support ring respectively.

In the utility model, the sealing surface between decompression lid and rear backplate is protected by newly-increased outer ring, is kept away Exempt from sealing surface directly to contact and wear with slurry fluid；Meanwhile not isometrical hole is set by the centre bore of outer ring and will be depressurized The outer diameter of lid is arranged to matched not isometrical outer diameter therewith, and the support ring being arranged is located in the first hole, to increase Sealed pathway between decompression lid and rear backplate, the sealing surface further avoided between the decompression lid of script and rear backplate lose The case where effect results in integral sealing to fail appearance.To sum up, it improves decompression and covers the wear-resistant of the sealing structure formed with rear backplate Damage property ensure that effective Sealing period meets pump whole projected life.

In the utility model, sealing ring I is preferably rectangular seal, without processing in decompression lid and the sealing surface of rear backplate The annular groove of one placement sealing ring, further ensure that the intensity of rear backplate.Meanwhile depressurizing lid, rear backplate and outer ring In the fitting perpendicular to each sealing surface on axis body axis, in first assembled, decompression lid, rear backplate and outer ring are each close Cover is subjected to the effect from screw in advance, increases the pressing force between sealing surface.Screw not only ensure that outer ring is fixed On the periphery of support ring, also passes through oneself concentricity between threaded hole, ensure that each sealing surface in axis body axial direction Preparatory compression；Then, when final assembly, the axial pressing force that Pulp pump axis body has in the axial direction is further compressed Each sealing surface.

Due to using the technical program, the beneficial effects of the utility model are:

1. the utility model is used for the decompression lid mechanism of fluid system, by newly-increased outer ring to decompression lid and rear backplate Between sealing surface protected, avoid sealing surface from directly contacting with slurry fluid and wear；Meanwhile the centre bore of outer ring being set It is set to not isometrical hole and the outer diameter of decompression lid is arranged to matched not isometrical outer diameter therewith, and the support ring position being arranged In the first hole, to increase the sealed pathway between decompression lid and rear backplate, the decompression lid of script is further avoided The case where sealing surface failure between rear backplate results in integral sealing to fail appearance.To sum up, decompression lid and rear shield are improved Board group at sealing structure abrasion resistance, ensure that effective Sealing period meets pump whole projected life.

2. the utility model is used for the decompression lid mechanism of fluid system, sealing ring I is preferably rectangular seal, without subtracting Gland and the sealing surface of rear backplate process the annular groove of a placement sealing ring, further ensure that the intensity of rear backplate；Together When, decompression lid, rear backplate and outer ring subtract in the fitting perpendicular to each sealing surface on axis body axis in first assembled Gland, rear backplate and each sealing surface of outer ring are subjected to the effect from screw in advance, increase the compression between sealing surface Power.Screw not only ensure that outer ring is fixed on the periphery of support ring, also the concentricity by oneself between threaded hole, guarantee Preparatory compression of each sealing surface in axis body axial direction；Then, when final assembly, Pulp pump axis body has in the axial direction Axial pressing force has further compressed each sealing surface.

Detailed description of the invention

In order to illustrate more clearly of the technical solution of this utility model embodiment, will make below to required in embodiment Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of this utility model, therefore not It should be considered as the restriction to range, for those of ordinary skill in the art, without creative efforts, It can also be obtained according to these attached drawings other relevant attached drawings, in which:

Fig. 1 is the structural schematic diagram of the prior art；

The structural schematic diagram of Fig. 2 the utility model；

Fig. 3 is the main view of decompression lid；

Fig. 4 is the vertical section structure schematic diagram of decompression lid；

Fig. 5 is the structural schematic diagram of outer ring；

Numbering in the drawing explanation:

1- axis body, 2- decompression lid, 3- rear backplate, 4- sealing ring I, 5- outer ring, 6- support ring, 7- sealing ring II, 8- screw, 9- support bar, the first hole 10-, the second hole 11-, 12- third hole, the 4th hole 13-, 14- first external diameter section, 15- second external diameter section, 16- third outer diameter section, the first sealing ring of 17-, the second sealing ring of 18-, 19- third sealing ring, 20- through-hole, 21- relief hole.

Specific embodiment

In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation Example, is further elaborated this utility model.It should be appreciated that specific embodiment described herein is only to explain This utility model is not used to limit this utility model, i.e. described embodiment is only this utility model one Divide embodiment, instead of all the embodiments.This utility model embodiment being usually described and illustrated herein in the accompanying drawings Component can be arranged and be designed with a variety of different configurations.

Therefore, the detailed description of this embodiments of the present invention provided in the accompanying drawings is not intended to limit below and is wanted This scope of the utility model of protection is sought, but is merely representative of the selected embodiment of this utility model.It is practical based on book Novel embodiment, those skilled in the art's every other implementation obtained without making creative work Example, belongs to the range of book utility model protection.

It should be noted that the relational terms of term " first " and " second " or the like be used merely to an entity or Operation is distinguished with another entity or operation, and without necessarily requiring or implying between these entities or operation, there are any This actual relationship or sequence.

All features disclosed in this specification or disclosed all methods or in the process the step of, in addition to mutually exclusive Feature and/or step other than, can combine in any way.

It elaborates below with reference to Fig. 1 to Fig. 5 to the utility model.

Embodiment 1

As Figure 1-Figure 5, the utility model is used for the decompression lid mechanism of fluid system, including is set in slurry pump shaft Decompression lid 2 and rear backplate 3 on body 1 further include screw 8, the outer ring 5 coaxial with decompression lid 2, in the decompression lid 2 and rear shield Sealing ring I4 is provided on contact surface between plate 3, the centre bore of the outer ring 5 is n sections of not isometrical holes, along the axis of axis body 1 Line is with being followed successively by connection and coaxial the first hole, the second hole ... and the (n+1)th hole far from rear backplate 3, and the first hole is to (n+1)th The aperture in hole is gradually reduced with far from rear backplate 3；

The outer diameter of the decompression lid 2 is n sections of not isometrical outer diameters, is followed successively by along the axis of axis body 1 with far from rear backplate 3 First external diameter section, second external diameter section ... and the n-th outer diameter section, each outer diameter section are gradually reduced with separate rear backplate 3, and n-th The aperture in hole is consistent with the n-th outer diameter section, and works in coordination；

It is provided with the n-th sealing ring between side of n-th of outer diameter section far from rear backplate 3 and the bottom hole in n-th of hole, it is described Side in rear backplate 3 close to decompression lid 2 is provided with support ring 6, and the outer diameter of the support ring 6 is consistent with the aperture in the n-th hole, and Support ring 6 is located in the n-th hole, and sealing ring II 7, the screw 8 are provided between the outer wall of support ring 6 and the hole wall in the n-th hole It is threadedly coupled after sequentially passing through outer ring 5 and sealing ring II 7 with support ring 6；

The two sides of the sealing ring I4 are contacted with decompression lid 2 and support ring 6 respectively.

Each sealing ring in the utility model is in compressive state at work, i.e. sealing ring is outer with what is contacted Interference fit state is between diameter, internal diameter.

In the utility model, protected by the sealing surface between 3 pairs of outer ring newly-increased decompression lids 2 and rear backplate 3, It avoids sealing surface from directly contacting with slurry fluid and wears；Meanwhile not isometrical hole is set by the centre bore of outer ring 5 and will be subtracted The outer diameter of gland 2 is arranged to matched not isometrical outer diameter therewith, and the support ring 6 being arranged is located in the first hole, to increase Big sealed pathway between decompression lid 2 and rear backplate 3, further avoids between the decompression lid 2 of script and rear backplate 3 The case where sealing surface failure results in integral sealing to fail appearance.To sum up, the sealing knot of decompression lid with rear backplate composition is improved The abrasion resistance of structure ensure that effective Sealing period meets pump whole projected life.

In the utility model, sealing ring I4 is preferably rectangular seal, without adding in decompression lid and the sealing surface of rear backplate The annular groove of work one placement sealing ring, further ensure that the intensity of rear backplate 3.Meanwhile depressurizing lid, rear backplate and outer Ring 3 is in the fitting perpendicular to each sealing surface on axis body axis, and in first assembled, decompression lid, rear backplate and outer ring 3 are each A sealing surface is subjected to the effect from screw 8 in advance, increases the pressing force between sealing surface.Screw 8 not only ensure that outer Ring 3 is fixed on the periphery of support ring, also the concentricity by oneself between threaded hole, ensure that each sealing surface in axis body Preparatory compression in axial direction；Then, when final assembly, the axial pressing force that Pulp pump axis body has in the axial direction is further Each sealing surface is compressed.

Embodiment 2

The present embodiment is that specific implementation explanation is made to the value of n.

As shown in Fig. 2, Fig. 4 and Fig. 5, in the utility model, the n is 3, and the centre bore of the outer ring 5 is along axis body 1 Axis depressurizes the outer diameter edge of lid 2 with the first hole 10, the second hole 11, third hole 12 and the 4th hole 13 is followed successively by far from rear backplate 3 Axis body 1 axis with being followed successively by first external diameter section 14, second external diameter section 15 and third outer diameter section 16 far from rear backplate 3, n-th Sealing ring is followed successively by the first sealing ring 17, the second sealing ring 18 and third sealing with far from rear backplate 3 along the axis of axis body 1 Circle 19.

The number of n should not be too large, and preferably 3.

Embodiment 3

The present embodiment is that specific implementation explanation is made to the structure of decompression lid 2.

As shown in Figure 3, Figure 4, in the utility model, the through-hole 20 cooperated on the decompression lid 2 with axis body 1 is close to rear shield The side of plate 3 is provided with relief hole 21, and the relief hole 21 and through-hole 20 are coaxial, and the aperture of relief hole 21 is greater than through-hole 20 Aperture is provided with several support bars 9 in relief hole, and the support bar 9 is symmetrical along the axis centre of through-hole 20, and supports Perpendicular to the axis of through-hole 20, the side of support bar 9 is connect the axis of item 9 with the bottom hole of relief hole 21.

The setting of relief hole 21 is the weight in order to reduce decompression lid, consequently facilitating the work of Pulp pump.When relief hole 21 When aperture difference between through-hole 20 is larger, the bottom hole of relief hole 20 is also easy to produce crackle, therefore support bar 9 is arranged and is stepped down with increasing The intensity of 20 bottom hole of hole.

Further, the side on the support bar 9 far from 20 axis of through-hole is connect with the hole wall of relief hole 21, is supported The other side of item 9 is interior to be recessed into cylindrical radial face, projection of each cylindrical radial face in the plane perpendicular to 20 axis of through-hole Camber line be on the same circumference, the center of circle of the circumference is located on the axis of through-hole 20.

Preferably, there are six the support bars 9.

The above, only preferred embodiments of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art, can be without creative labor in the technical scope disclosed by the utility model The dynamic change or replacement expected, should be covered within the scope of the utility model.Therefore, the protection model of the utility model Enclosing be determined by the scope of protection defined in the claims.

Claims (5)

1. the decompression lid mechanism of fluid system is used for, including the decompression lid (2) being set on Pulp pump axis body (1) and rear backplate (3), sealing ring I (4) are provided on the contact surface between the decompression lid (2) and rear backplate (3), it is characterised in that: also wrap Screw (8), the outer ring (5) coaxial with decompression lid (2) are included, the centre bore of the outer ring (5) is n sections of not isometrical holes, along axis body (1) axis is followed successively by connection and the first coaxial hole, the second hole ... and the (n+1)th hole with separate rear backplate (3), and first The aperture in hole to the (n+1)th hole is gradually reduced with far from rear backplate (3)；

The outer diameter of the decompression lid (2) is n section not isometrical outer diameters, along the axis of axis body (1) with separate rear backplate (3) successively For first external diameter section, second external diameter section ... and the n-th outer diameter section, each outer diameter section is gradually reduced with separate rear backplate (3), and The aperture in the n-th hole is consistent with the n-th outer diameter section, and works in coordination；

It is provided with the n-th sealing ring between side of n-th of outer diameter section far from rear backplate (3) and the bottom hole in n-th of hole, after described Side on backplate (3) close to decompression lid (2) is provided with support ring (6), the outer diameter of the support ring (6) and the aperture in the n-th hole Unanimously, and support ring (6) is located in the n-th hole, is provided with sealing ring II between the outer wall of support ring (6) and the hole wall in the n-th hole (7), the screw (8) sequentially passes through outer ring (5) and sealing ring II (7) and is threadedly coupled afterwards with support ring (6)；

The two sides of the sealing ring I (4) are contacted with decompression lid (2) and support ring (6) respectively.

2. the decompression lid mechanism according to claim 1 for fluid system, it is characterised in that: the n is 3, described outer The centre bore of ring (5) is followed successively by the first hole (10), the second hole (11), the with far from rear backplate (3) along the axis of axis body (1) The outer diameter in three holes (12) and the 4th hole (13), decompression lid (2) is followed successively by along the axis of axis body (1) with far from rear backplate (3) First external diameter section (14), second external diameter section (15) and third outer diameter section (16), the n-th sealing ring along axis body (1) axis with The first sealing ring (17), the second sealing ring (18) and third sealing ring (19) are followed successively by far from rear backplate (3).

3. the decompression lid mechanism according to claim 1 for fluid system, it is characterised in that: cover (2) in the decompression The upper through-hole (20) with axis body (1) cooperation is provided with relief hole (21) close to the side of rear backplate (3), the relief hole (21) and Through-hole (20) coaxially, and the aperture of relief hole (21) be greater than through-hole (20) aperture, several supports are provided in relief hole Item (9), the support bar (9) is symmetrical along the axis centre of through-hole (20), and the axis of support bar (9) is perpendicular to through-hole (20) Axis, the side of support bar (9) is connect with the bottom hole of relief hole (21).

4. the decompression lid mechanism according to claim 3 for fluid system, it is characterised in that: on the support bar (9) Side far from through-hole (20) axis is connect with the hole wall of relief hole (21), and the other side of support bar (9) is interior to be recessed into cylinder The camber line of arcwall face, projection of each cylindrical radial face in the plane perpendicular to through-hole (20) axis is in the same circumference On, the center of circle of the circumference is located on the axis of through-hole (20).

5. the decompression lid mechanism according to claim 3 or 4 for fluid system, it is characterised in that: the support bar (9) There are six.