Radial self-compensating shaft seal

Abstract

The utility model relates to the technical field of hydropower station long-shaft deep-well pump sealing, in particular to a radial self-compensation shaft seal which comprises a shaft seal unit, and the shaft seal unit comprises a sealing body, a supporting bone and a tightening elastic piece. And the auxiliary unit comprises a sliding block and an extrusion part. The shaft seal has the advantages that the sealing main body is arranged between the deep-well pump packing chamber and the rotating shaft to ensure the sealing effect, the supporting bone prevents the sealing main body from deforming, the tightening elastic piece applies tightening force to the sealing main body, and the auxiliary unit strengthens the sealing effect when the water pump rotating shaft rotates. Automatic compensation can be carried out according to the shaft seal abrasion condition and the water pump transmission shaft swing condition so as to achieve the sealing effect, and meanwhile the stacking number of a set of shaft seals can be determined according to the size of an original shaft seal seasoning chamber of equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of deep well pump seals, in particular to a radial self-compensating shaft seal. Background Art

[0002] The common seal for long-axis deep-well pumps in hydropower stations is packing seal, which is easily hydrolyzed over time and requires regular tightening of the sealing plate to ensure the sealing effect. At the same time, if there is a small gap in the packing seal, leakage will occur, which often brings inconvenience to the sealing work and increases the operating cost. Utility Model Content

[0003] In view of the above-mentioned technical problem that the existing packing seal often needs to tighten the sealing plate to ensure the sealing effect, the utility model is proposed.

[0004] The utility model aims to provide a radial self-compensating shaft seal, which aims to solve the self-compensating sealing problem of a long-shaft deep-well pump in a hydropower station.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a radial self-compensating shaft seal, which includes a shaft seal unit, the shaft seal unit includes a sealing body, a supporting bone and a tightening elastic member, the supporting bone is arranged in the sealing body, the tightening elastic member is also arranged in the sealing body, the sealing body is annular, and the tightening elastic member is arranged on one side of the supporting bone; an auxiliary unit, the auxiliary unit includes a sliding block and an extrusion member, the sliding block is movably connected to the extrusion member, the sliding block is arranged in the sealing body, and the extrusion member is also arranged in the sealing body.

[0006] As a preferred solution of the radial self-compensating shaft seal of the utility model, wherein: the cross-section of the sealing body is a mountain shape, the sealing body includes an interior space, a sealing protrusion, a built-in platform and an inner groove, the interior space is arranged in the sealing body, the built-in platform is arranged in the interior space, the inner groove is arranged in the sealing body, and the sealing protrusion is arranged on the inner side of the sealing body.

[0007] As a preferred solution of the radial self-compensating shaft seal of the utility model, the inner storage space includes a first storage chamber and a second storage chamber, the first storage chamber is arranged near the outer side surface of the sealing body, the second storage chamber is arranged near the inner side surface of the sealing body, and the support bone is arranged in the first storage chamber.

[0008] As a preferred solution of the radial self-compensating shaft seal of the utility model, wherein: the sealing protrusion includes a sealing protrusion and a tightening elastic member limiting groove, the sealing protrusion is arranged on the inner side surface of the sealing body, the tightening elastic member limiting groove is arranged on the opposite side of the sealing protrusion, and the tightening elastic member is arranged in the tightening elastic member limiting groove.

[0009] As a preferred solution of the radial self-compensating shaft seal of the utility model, wherein: the built-in platform includes a first platform and a second platform, and the first platform is arranged on the upper side of the second platform.

[0010] As a preferred solution of the radial self-compensating shaft seal of the utility model, wherein: the first platform includes a limit partition and a first limit guide groove, the limit partition is fixedly arranged on the first platform, the first limit guide groove is arranged between the limit partitions, at least two limit partitions and first limit guide grooves are arranged, the second platform includes a positioning groove, the positioning groove is arranged on the second platform, and at least two positioning grooves are arranged.

[0011] As a preferred solution of the radial self-compensating shaft seal of the utility model, the inner groove includes a first elastic member and a limiting groove, one end of the first elastic member is fixedly arranged on the bottom side of the inner groove, and the limiting groove is arranged on the bottom side of the inner groove.

[0012] As a preferred solution of the radial self-compensating shaft seal of the utility model, the sliding block includes a counterweight block and a limit block, the limit block is fixedly arranged on the bottom side of the counterweight block, and at least two sliding blocks are arranged.

[0013] As a preferred solution of the radial self-compensating shaft seal of the utility model, the counterweight block includes a connecting groove and a push rod, the connecting groove is arranged on the side of the counterweight block, one end of the push rod is arranged on the bottom side of the connecting groove, and the limit block includes an inclined extrusion surface, and the inclined extrusion surface is arranged on the bottom side of the limit block.

[0014] As a preferred solution of the radial self-compensating shaft seal of the utility model, the extrusion member includes a second elastic member, a second limiting guide groove and an extrusion head, the second elastic member is arranged on the bottom side of the extrusion member, the second limiting guide groove is arranged on the upper side of the extrusion member, the extrusion head is arranged on the side of the extrusion member, and at least two extrusion members are arranged.

[0015] The beneficial effects of the radial self-compensating shaft seal of the utility model are as follows: the sealing body is arranged between the stuffing chamber of the deep well pump and the rotating shaft to ensure the sealing effect, the support bone prevents the sealing body from being deformed, the tightening elastic member gives the sealing body a tightening force, and the auxiliary unit strengthens the sealing effect when the water pump rotating shaft rotates. After the shaft seal is installed in place, it can automatically compensate according to the wear of the shaft seal and the swing of the water pump transmission shaft to achieve its sealing effect. At the same time, the superposition quantity of a group of shaft seals can be determined according to the size of the original shaft seal seasoning chamber of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0017] Figure 1 It is a cross-sectional view of the shaft sealing unit in the utility model.

[0018] Figure 2 This is a side view of the sealing body in the utility model

[0019] Figure 3 It is a partial enlarged view of the cross section of the sealing body in the utility model.

[0020] Figure 4 It is a partial enlarged view of the cross section of the self-compensating shaft seal in the utility model.

[0021] Figure 5 This is a diagram showing the auxiliary unit structure in the present utility model.

[0022] Figure 6 It is a superimposed cross-sectional view of the self-compensating shaft seal in the utility model. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0026] Example 1

[0027] Reference Figure 1 to Figure 4 , which is the first embodiment of the utility model, provides a radial self-compensating shaft seal, including a shaft seal unit 100 and an auxiliary unit 200, the shaft seal unit 100 includes a sealing body 101, a support bone 102 and a tightening elastic member 103, and the auxiliary unit 200 includes a sliding block 201 and an extrusion member 202.

[0028] Preferably, the shaft sealing unit 100 includes a sealing body 101, a support bone 102 and a tightening elastic member 103. In this embodiment, the sealing body 101 is preferably made of rubber. The sealing body 101 is arranged between the stuffing chamber and the rotating shaft of the deep well pump. The support bone 102 is arranged in the sealing body 101. The support bone 102 has a material hardness higher than that of the sealing body 101, and is preferably made of stainless steel. Its function is to provide support for the sealing body 101 to prevent the sealing body 101 from deforming and affecting the sealing effect. The tightening elastic member 103 is also arranged in the sealing body 101. The sealing body 101 is annular, and the tightening elastic member 103 is arranged on one side of the support bone 102. The tightening elastic member 103 is installed on the inner side of the contact part between the sealing body 101 and the transmission shaft. Its function is to provide a tightening force to the sealing body 101. After the tightening elastic member 103 is worn out after a long period of operation, the sealing body 101 is kept in good contact with the transmission shaft under the action of the tightening elastic member 103, thereby improving the sealing reliability.

[0029] Preferably, the auxiliary unit 200 includes a sliding block 201 and an extrusion piece 202, the sliding block 201 is movably connected to the extrusion piece 202, the sliding block 201 is arranged in the sealing body 101, and the extrusion piece 202 is also arranged in the sealing body 101. When the sealing body 101 rotates with the transmission shaft, its centrifugal force causes the sliding block 201 to be squeezed onto the extrusion piece 202, and the extrusion piece 202 makes the tightening elastic piece 103 more tightly compressed, thereby improving the sealing effect.

[0030] When in use, the sealing body 101 is arranged between the deep well pump stuffing chamber and the rotating shaft, and the support bone 102 is arranged in the sealing body 101. The function of the support bone 102 is to provide support for the sealing body 101 to prevent the sealing body 101 from being deformed and affecting the sealing effect. The tightening elastic member 103 is installed on the inner side of the contact part between the sealing body 101 and the transmission shaft. Its function is to provide a tightening force for the sealing body 101. After the tightening elastic member 103 is worn out after long-term operation, the sealing body 101 and the transmission shaft are kept in good contact under the action of the tightening elastic member 103, thereby improving the sealing reliability. When the sealing body 101 rotates with the transmission shaft, its centrifugal force squeezes the sliding block 201 onto the extrusion member 202, and the extrusion member 202 compresses the tightening elastic member 103 more tightly, thereby improving the sealing effect.

[0031] Example 2

[0032] Reference Figure 1 to Figure 5 , which is the second embodiment of the utility model. Different from the previous embodiment, the cross-section of the sealing body 101 is in the shape of a mountain. The sealing body 101 includes a content storage space 101a, a sealing protrusion 101b, a built-in platform 101c and an inner groove 101d. The content storage space 101a is arranged in the sealing body 101, the built-in platform 101c is arranged in the content storage space 101a, the inner groove 101d is arranged in the sealing body 101, and the sealing protrusion 101b is arranged on the inner side of the contact portion between the sealing body 101 and the transmission shaft.

[0033] Furthermore, the inner storage space 101a includes a first storage chamber 101a-1 and a second storage chamber 101a-2. The first storage chamber 101a-1 is arranged near the outer side surface of the sealing body 101, and the second storage chamber 101a-2 is arranged on the inner side of the contact part between the sealing body 101 and the transmission shaft. The supporting bone 102 is arranged in the first storage chamber 101a-1.

[0034] Furthermore, the sealing protrusion 101b includes a sealing protrusion 101b-1 and a tightening elastic member limiting groove 101b-2. The sealing protrusion 101b-1 is arranged at the contact part between the sealing body 101 and the transmission shaft. The sealing protrusion 101b-1 is tightly fitted with the transmission shaft. The tightening elastic member limiting groove 101b-2 is arranged on the opposite side of the sealing protrusion 101b-1. The tightening elastic member 103 is arranged in the tightening elastic member limiting groove 101b-2. The tightening elastic member 103 enhances the tight fit effect between the sealing protrusion 101b-1 and the transmission shaft.

[0035] Furthermore, the built-in platform 101c includes a first platform 101c-1 and a second platform 101c-2, the first platform 101c-1 is arranged on the upper side of the second platform 101c-2, the first platform 101c-1 includes a limiting partition 101c-11 and a first limiting guide groove 101c-12, the limiting partition 101c-11 is fixedly arranged on the first platform 101c-1, and the first limiting guide groove 101c-12 is arranged on the limiting partition 101c-11. 01c-11, the limiting partition 101c-11 limits the sliding of the sliding block 201, and at least two limiting partitions 101c-11 and the first limiting guide groove 101c-12 are set. The second platform 101c-2 includes a positioning groove 101c-21, and the positioning groove 101c-21 is set on the second platform 101c-2. At least two positioning grooves 101c-21 are set, and the built-in platform 101c also supports the sealing body 101.

[0036] Furthermore, the inner groove 101d includes a first elastic member 101d-1 and a limiting groove 101d-2, one end of the first elastic member 101d-1 is fixedly arranged on the bottom side of the inner groove 101d, the other end of the first elastic member 101d-1 is fixedly arranged on the bottom side of the connecting groove 201a-1, and the limiting groove 101d-2 is arranged on the bottom side of the inner groove 101d.

[0037] Preferably, the sliding block 201 includes a counterweight block 201a and a limit block 201b, the limit block 201b is fixedly arranged on the bottom side of the counterweight block 201a, and at least two sliding blocks 201 are arranged.

[0038] Furthermore, the counterweight block 201a includes a connecting groove 201a-1 and a push rod 201a-2, the connecting groove 201a-1 is arranged on the side of the counterweight block 201a, one end of the push rod 201a-2 is arranged on the bottom side of the connecting groove 201a-1, the push rod 201a-2 is slidably connected with the limiting groove 101d-2, the limiting block 201b includes an inclined extrusion surface 201b-1, the inclined extrusion surface 201b-1 is arranged on the bottom side of the limiting block 201b, the inclined extrusion surface 201b-1 gradually decreases outward from the circular part of the sealing body 101, and when the sliding block 201 slides away from the center of the sealing body 101, the pressure of the sliding block 201 on the extrusion member 202 gradually increases.

[0039] Preferably, the extrusion member 202 includes a second elastic member 202a, a second limiting guide groove 202b and an extrusion head 202c, the second elastic member 202a is arranged on the bottom side of the extrusion member 202, the second limiting guide groove 202b is arranged on the upper side of the extrusion member 202, and the extrusion head 202c is arranged on the side of the extrusion member 202, and at least two extrusion members 202 are arranged.

[0040] When in use, the sealing body 101 is arranged between the packing chamber and the rotating shaft of the deep well pump, and the support bone 102 is arranged in the sealing body 101. The support bone 102 is used to support the sealing body 101 to prevent the sealing body 101 from deforming and affecting the sealing effect. The tightening elastic member 103 is installed on the inner side of the contact part between the sealing body 101 and the transmission shaft, and its function is to give a tightening force to the sealing body 101. After the tightening elastic member 103 is worn after a long time of operation, the tightening elastic member 103 is used to tighten the sealing body 101. The sealing body 101 maintains good contact with the transmission shaft to improve the sealing reliability. When the sliding block 201 slides away from the center of the sealing body 101, the inclined extrusion surface 201b-1 on the limit block 201b gradually increases the pressure on the extrusion member 202. After the push rod 201a-2 extends into the limit groove 101d-2, the second elastic member 202a is pressed downward by the pressure. After the extrusion member 202 is pressed downward, the extrusion head 202c squeezes the tightening elastic member 103, thereby enhancing the sealing effect of the tightening elastic member 103 on the active shaft.

[0041] Example 3

[0042] Reference Figure 1 to Figure 6 , which is the third embodiment of the utility model, the sealing body 101, the support bone 102 and the tightening elastic member 103, this radial self-compensating shaft seal is designed and manufactured according to the operating speed of the water pump, the shaft diameter of the transmission shaft and other parameters. After installation, it can automatically compensate according to the wear of the shaft seal and the swing of the water pump transmission shaft to achieve its sealing effect. There is no need to tighten the sealing pressure plate regularly, which effectively reduces the workload of maintenance personnel and improves the reliability of equipment operation.

[0043] When in use, a radial self-compensating shaft seal is stacked for better effect. The number of stacked self-compensating shaft seals is determined according to the size of the original shaft seal seasoning chamber of the equipment. After the stacking is completed, the shaft seal pressure plate is installed. The pressure plate should not be installed too tightly to prevent the water pump from starting with too much current. At the same time, the sliding block 201 and the extrusion piece 202 cooperate with the extrusion effect of the tightening elastic piece 103 to improve the sealing effect.

[0044] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also an equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0045] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0046] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A radial self-compensating shaft seal, characterized in that: include, A shaft sealing unit (100), the shaft sealing unit (100) comprising a sealing body (101), a supporting bone (102) and a tightening elastic member (103), the supporting bone (102) being arranged in the sealing body (101), the tightening elastic member (103) also being arranged in the sealing body (101), the sealing body (101) being annular, and the tightening elastic member (103) being arranged on one side of the supporting bone (102); An auxiliary unit (200), the auxiliary unit (200) comprising a sliding block (201) and an extrusion piece (202), the sliding block (201) being movably connected to the extrusion piece (202), the sliding block (201) being arranged in the sealing body (101), and the extrusion piece (202) being also arranged in the sealing body (101).

2. The radial self-compensating shaft seal according to claim 1, characterized in that: The sealing body (101) has a cross-section in the shape of a mountain. The sealing body (101) comprises a content storage space (101a), a sealing protrusion (101b), a built-in platform (101c) and an inner groove (101d). The content storage space (101a) is arranged in the sealing body (101), the built-in platform (101c) is arranged in the content storage space (101a), the inner groove (101d) is arranged in the sealing body (101), and the sealing protrusion (101b) is arranged on the inner side of the sealing body (101).

3. The radial self-compensating shaft seal according to claim 2, characterized in that: The inner storage space (101a) comprises a first storage cavity (101a-1) and a second storage cavity (101a-2); the first storage cavity (101a-1) is arranged near the outer side surface of the sealing body (101); the second storage cavity (101a-2) is arranged near the inner side surface of the sealing body (101); and the supporting bone (102) is arranged in the first storage cavity (101a-1).

4. The radial self-compensating shaft seal according to claim 3, characterized in that: The sealing protrusion (101b) comprises a sealing protrusion (101b-1) and a tightening elastic member limiting groove (101b-2); the sealing protrusion (101b-1) is arranged on the inner side surface of the sealing body (101); the tightening elastic member limiting groove (101b-2) is arranged on the side opposite to the sealing protrusion (101b-1); and the tightening elastic member (103) is arranged in the tightening elastic member limiting groove (101b-2).

5. The radial self-compensating shaft seal according to claim 2 or 4, characterized in that: The built-in platform (101c) comprises a first platform (101c-1) and a second platform (101c-2), wherein the first platform (101c-1) is arranged on the upper side of the second platform (101c-2).

6. The radial self-compensating shaft seal according to claim 5, characterized in that: The first platform (101c-1) comprises a limiting partition (101c-11) and a first limiting guide groove (101c-12); the limiting partition (101c-11) is fixedly arranged on the first platform (101c-1); the first limiting guide groove (101c-12) is arranged between the limiting partitions (101c-11); at least two limiting partitions (101c-11) and two first limiting guide grooves (101c-12) are arranged; The second platform (101c-2) comprises a positioning groove (101c-21), and the positioning groove (101c-21) is arranged on the second platform (101c-2), and at least two positioning grooves (101c-21) are arranged.

7. The radial self-compensating shaft seal according to claim 6, characterized in that: The inner groove (101d) comprises a first elastic member (101d-1) and a limiting groove (101d-2), one end of the first elastic member (101d-1) is fixedly arranged on the bottom side of the inner groove (101d), and the limiting groove (101d-2) is arranged on the bottom side of the inner groove (101d).

8. The radial self-compensating shaft seal according to claim 1 or 7, characterized in that: The sliding block (201) comprises a counterweight block (201a) and a limit block (201b); the limit block (201b) is fixedly arranged on the bottom side of the counterweight block (201a); and at least two sliding blocks (201) are arranged.

9. The radial self-compensating shaft seal according to claim 8, characterized in that: The counterweight block (201a) comprises a connecting groove (201a-1) and a top rod (201a-2), wherein the connecting groove (201a-1) is arranged on the side of the counterweight block (201a), and one end of the top rod (201a-2) is arranged on the bottom side of the connecting groove (201a-1). The limiting block (201b) comprises an inclined extrusion surface (201b-1), and the inclined extrusion surface (201b-1) is arranged on the bottom side of the limiting block (201b).

10. The radial self-compensating shaft seal according to claim 1 or 9, characterized in that: The extrusion member (202) comprises a second elastic member (202a), a second limiting guide groove (202b) and an extrusion head (202c); the second elastic member (202a) is arranged on the bottom side of the extrusion member (202); the second limiting guide groove (202b) is arranged on the top side of the extrusion member (202); the extrusion head (202c) is arranged on the side of the extrusion member (202); and at least two extrusion members (202) are arranged.

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