Bidirectional balance type mechanical sealing device for sand mill

Abstract

The utility model discloses a bidirectional balance type mechanical sealing device for a sand mill. The bidirectional balance type mechanical sealing device comprises a medium side sealing assembly and a medium side sealing assembly, wherein the medium side sealing assembly is composed of an inner moving ring, an inner static ring and a push ring; the inner moving ring is fixedly connected with the shaft sleeve through a cylindrical pin and a sealing ring, and the push ring moving axially is tightly attached to the end face of the inner moving ring to form sealing. The atmosphere side sealing assembly is composed of an outer moving ring, an outer static ring, a spring, a spring seat, a flow guide sleeve and an outer gland; the outer moving ring is in floating connection with the shaft sleeve through a sealing ring, and axial elastic compensation is realized through a spring and a spring seat; the flow guide sleeve is fixed to the inner wall of the outer gland and forms a sealed cavity with the outer static ring. The flow guide sleeve is provided with a liquid inlet hole and a liquid outlet hole, and cooling liquid enters the sealing cavity through the liquid inlet hole. By means of the inner and outer double-moving-ring cooperative compensation structure, the effects of adapting to bidirectional pressure changes under complex working conditions and reducing abrasion of the sealing face are achieved. And the spiral flow guide grooves of the flow guide sleeve can significantly improve the cooling efficiency and prolong the service life of the device.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sand mill technical field relates to a kind of for sand mill bidirectional balance type mechanical sealing device. BACKGROUND

[0002] The mechanical sealing device of traditional sand mill adopts unilateral sealing structure, and the sealing failure is caused by friction heat accumulation in long-term operation, and the leaked medium is easy to block the cavity, which affects the stability of the equipment. In addition, the compensation capacity of the existing sealing structure is insufficient, and it is difficult to adapt to bidirectional pressure change, which leads to the aggravation of sealing surface wear. Therefore, there is an urgent need for a bidirectional balance type sealing device that can dynamically compensate pressure, efficiently dissipate heat and prevent leakage. SUMMARY

[0003] To solve the above technical problems, the utility model adopts the following technical scheme:

[0004] A bidirectional balance type mechanical sealing device for sand mill, medium side sealing assembly: by inner dynamic ring, inner static ring and push ring is formed;Inner dynamic ring is fixedly connected with shaft sleeve by cylindrical pin and sealing ring, and forms sealing by push ring close to inner dynamic ring end face through axial movement;

[0005] Atmosphere side sealing assembly: by outer dynamic ring, outer static ring, spring, spring seat, flow guide sleeve and outer gland is formed;Outer dynamic ring is floatingly connected with shaft sleeve by sealing ring, and realizes axial elastic compensation by spring and spring seat;Flow guide sleeve is fixed to the inner wall of outer gland, and forms sealing cavity with outer static ring;

[0006] Flow guide sleeve is provided with liquid inlet hole and liquid outlet hole, and cooling liquid enters sealing cavity through liquid inlet hole.

[0007] As a further scheme of the utility model: the axial cooperation of push ring and inner static ring realizes dynamic adjustment by at least two groups of set screws.

[0008] As a further scheme of the utility model: the cooling liquid flow path of flow guide sleeve covers the contact surface of inner dynamic ring and inner static ring, and the contact surface of outer dynamic ring and outer static ring, and the inner wall of flow guide sleeve is provided with spiral flow groove.

[0009] As a further scheme of the utility model: spring is a plurality of groups of compression spring, and the elastic coefficient thereof is matched with the axial displacement amount of shaft sleeve;Spring is evenly distributed along the circumference of outer dynamic ring, and is embedded in the annular groove of spring seat, and spring seat is fixed to outer gland by internal hexagonal bolt.

[0010] As a further scheme of the utility model: the outer gland and flow guide sleeve are fixedly connected by internal hexagonal bolt, and the outer side of outer gland is provided with hole check ring, for preventing axial displacement of flow guide sleeve.

[0011] The utility model discloses beneficial effect: the application realizes the two -way pressure change under the complex working condition adaptation, reduces the effect of sealing surface wear -out through the inside and outside double -acting ring coordination compensation structure. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the structure schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application, and obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments, and it should be understood that the present application is not limited by the example embodiments disclosed here. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0014] In the description of the utility model, it is understood that the orientation or position relation indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model.

[0015] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0016] In the embodiments of the utility model, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0017] Please refer to Figure 1The utility model discloses embodiments of a kind of two-way balance type mechanical sealing device for sand mill, comprising:

[0018] Medium side sealing assembly: by inner ring 4, inner static ring 3 and push ring 5 are formed;Inner ring 4 is fixedly connected with shaft sleeve 6 by cylindrical pin and sealing ring, and forms sealing by push ring 5 of axial movement and close inner ring end face;

[0019] Atmosphere side sealing assembly: by outer ring 2, outer static ring 1, spring 8, spring seat 9 and flow guide sleeve 7 are formed;Outer ring 2 is floatingly connected with shaft sleeve 6 by sealing ring, and realizes axial elastic compensation by spring 8 and spring seat 9;Flow guide sleeve 7 is fixed in the inner wall of outer gland 10, and forms sealing cavity with outer static ring 1;

[0020] Flow guide sleeve 7 is equipped with liquid inlet hole and liquid outlet hole, cooling liquid enters flow guide sleeve 7 directly from liquid inlet hole and flushes inner cavity, carries away heat generated by static ring and dynamic ring friction and part of leaked medium, avoids that leaked medium causes cavity to be blocked, improves cooling effect.

[0021] Further, the axial cooperation of push ring 5 and inner static ring 3 is realized by at least two groups of set screws, and push ring 5 is equipped with the blocking ring of PTFE material on the surface, for reducing axial movement resistance.

[0022] Further, the cooling liquid flow path of flow guide sleeve 7 covers the contact surface of inner ring 4 and inner static ring 3 and the contact surface of outer ring 2 and outer static ring 1, and the inner wall of flow guide sleeve 7 is equipped with spiral flow guide groove, for enhancing cooling liquid turbulent effect.

[0023] Further, spring 8 is a plurality of compression springs that are uniformly distributed, and the elastic coefficient thereof is matched with the axial displacement amount of shaft sleeve 6, to realize real-time compensation of bidirectional pressure change;Spring 8 is evenly distributed along the circumference of outer ring 2, and is embedded in the annular groove of spring seat 9, and spring seat 9 is fixed to outer gland 10 by inner hexagonal bolt.

[0024] Further, the outer gland 10 and the flow guide sleeve 7 are fixedly connected by the inner hexagonal bolt, and the outer side of the outer gland 10 is equipped with hole blocking ring, for preventing axial displacement of flow guide sleeve 7.

[0025] It is also to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components, and the term "an element" can include comparable reference to a plurality of elements. Additionally, the term "or" as used herein means any one member of a logical disjunction (i.e., it is equivalent to "or" and "or else") and not a logical exclusion. Also, the terms "comprise," "comprising," "include," "including," and the like mean "including but not limited to." Furthermore, the description herein uses terms such as first and second to denote different elements, but the applicants do not intend these terms to denote an ordering, because some of these elements can, in fact, precede other ones in some of the implementations.

[0026] The above description of disclosed embodiments provides examples, and is not intended to be limiting. Numerous modifications of the embodiments, as defined herein, will be apparent to those in the art, and will not depart from the spirit or scope of the application. Accordingly, the application will be limited only by the scope of the claims.

Claims

1. A bidirectional balanced mechanical seal device for a sand mill, characterized by, Comprise: Medium side sealing assembly: by the inner dynamic ring, inner static ring and push ring; inner dynamic ring through the cylindrical pin and sealing ring with shaft sleeve fixed connection, through the axial movement of the push ring close to the end surface of the inner dynamic ring to form a seal; Atmosphere side sealing assembly: by the outer dynamic ring, outer static ring, spring, spring seat, flow guide sleeve and outer cover; outer dynamic ring through the sealing ring with shaft sleeve floating connection, and through the spring and spring seat to realize the axial elastic compensation; flow guide sleeve fixed in the inner wall of the outer cover, with the outer static ring to form a sealed cavity; Flow guide sleeve is provided with liquid inlet hole and liquid outlet hole, cooling liquid into the sealed cavity through the liquid inlet hole.

2. A bi-directional balanced mechanical seal device for a sand mill according to claim 1, wherein The axial cooperation of the push ring and the inner static ring is realized by at least two groups of tight bolts to realize dynamic adjustment.

3. A bi-directional balanced mechanical seal device for a sand mill according to claim 1, wherein The cooling liquid flow path of the flow guide sleeve covers the contact surface of the inner dynamic ring and the inner static ring, and the contact surface of the outer dynamic ring and the outer static ring, and the inner wall of the flow guide sleeve is provided with spiral flow groove.

4. A bi-directional balanced mechanical seal device for a sand mill according to claim 1, wherein The spring is a plurality of compression springs, and the elastic coefficient thereof is matched with the axial displacement of the shaft sleeve; the spring is uniformly distributed along the outer dynamic ring, and is embedded in the annular groove of the spring seat, and the spring seat is fixed to the outer cover through the inner hexagonal bolt.

5. A bi-directional balanced mechanical seal assembly for a sand mill as defined in claim 1, wherein, The outer cover and the flow guide sleeve are fixedly connected through the inner hexagonal bolt, and the outer side of the outer cover is provided with a hole stop ring for preventing the axial displacement of the flow guide sleeve.

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