Centrifugal pump sealing device convenient to install and replace

Abstract

The utility model discloses a centrifugal pump sealing device convenient to install and replace, and belongs to the field of centrifugal pump sealing. The centrifugal pump sealing device comprises a main shaft sleeve, an auxiliary shaft sleeve is movably connected to the outer arc face of the main shaft sleeve in a sleeved mode, a concave groove is formed in the edge of one side of the inner arc face of the auxiliary shaft sleeve, and a sealing shaft sleeve is arranged on the edge of one side of the outer arc face of the auxiliary shaft sleeve. One side of the sealing shaft sleeve is movably sleeved with a static ring, one side of the static ring is movably connected with a movable ring in a lap joint mode, the inner arc face of the movable ring is movably connected to the auxiliary shaft sleeve in a sleeved mode, one side of the auxiliary shaft sleeve is fixedly provided with a sealing disc body, a cavity groove is formed between the sealing disc body and the auxiliary shaft sleeve, and the inner arc face of the cavity groove is movably connected with a spring in a sleeved mode. By means of the sealing lips connected in the framework, the sealing reliability is improved, the outer arc faces are tightly attached to the inner arc face of the main shaft sleeve, relative movement cannot be generated among all parts, and the situation that the parts collide with one another in the transportation process, equipment is deformed or damaged, and the working reliability of the sealing device is affected is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump sealing technical field, specifically a centrifugal pump sealing device convenient to install and replace. BACKGROUND

[0002] Centrifugal pump is a kind of fluid conveying equipment widely used in chemical industry, petroleum, pharmaceutical, food and many other industries. Its working principle is to rely on the rotation of impeller to make liquid obtain energy and realize conveying. However, in the running process of centrifugal pump, there is a gap between pump shaft and pump body, if there is no effective sealing device, the liquid in the pump will leak outward along the shaft, or the impurities such as air outside will enter the pump.

[0003] The fitting precision between the dynamic ring and the static ring of the traditional centrifugal pump sealing needs to reach a very high standard, in the installation process, if the dynamic ring and the static ring are collided or the installation angle is deviated inadvertently, it will lead to sealing failure, and when the sealing appears failure and needs to be replaced, since its installation position is usually inside the pump body, the space is narrow, it is also difficult to disassemble and install new mechanical seal.

[0004] Therefore, the utility model provides a centrifugal pump sealing device convenient to install and replace to solve the above problems. UTILITY MODEL CONTENTS

[0005] (I) technical problem solved

[0006] The utility model provides a centrifugal pump sealing device convenient to install and replace, aims at solving the problems, such as when the existing sealing appears failure and needs to be replaced, since its installation position is usually inside the pump body, the space is narrow, it is also difficult to disassemble and install new mechanical seal, etc.

[0007] (II) technical scheme

[0008] To realize the above-mentioned purpose, the utility model provides the following technical scheme: including main shaft sleeve, the outer arc surface of main shaft sleeve is movably sleeved with auxiliary shaft sleeve, the inner arc surface one side edge of auxiliary shaft sleeve is equipped with recessed groove, the outer arc surface one side edge of auxiliary shaft sleeve is equipped with sealing shaft sleeve, one side of sealing shaft sleeve is movably sleeved with static ring, one side of static ring is movably overlapped with dynamic ring, the inner arc surface of dynamic ring is movably sleeved on auxiliary shaft sleeve, one side of auxiliary shaft sleeve is fixedly installed with sealing disc body, the cavity groove between sealing disc body and auxiliary shaft sleeve is equipped, the inner arc surface of cavity groove is movably sleeved with spring, one end of spring is overlapped on the inner side wall of sealing disc body, the other end of spring is overlapped with push ring.

[0009] As a preferred technical scheme of the present application, one side of the push ring is in abutment with the moving ring, and a plurality of fastening screws are arranged on the top of the one side surface of the sealing disc body in a ring array.

[0010] As a preferred technical scheme of the present application, an O-shaped sealing ring is fixedly sleeved in the concave groove of the inner arc surface of the secondary shaft sleeve, the inner arc surface of the O-shaped sealing ring is movably connected with the primary shaft sleeve, the inner arc surface of the primary shaft sleeve is provided with a shaft hole, and the pump shaft is connected in the shaft hole.

[0011] As a preferred technical scheme of the present application, the inner arc surface of the primary shaft sleeve is provided with a stepped end, the upper surface of the stepped end is movably overlapped with a framework, and the framework is provided with a support section close to the inner arc surface of the primary shaft sleeve.

[0012] As a preferred technical scheme of the present application, the side of the framework away from the support section is provided with an abutment section, the abutment section is in abutment with the surface of the pump shaft, the inner arc surface of the framework is provided with a hook section, and one end of the hook section is movably clamped with a sealing lip.

[0013] As a preferred technical scheme of the present application, the outer arc surface of the sealing lip is provided with a plug-in groove, the inner arc surface of the plug-in groove is movably clamped with the hook section, and the outer arc surface of the sealing lip is provided with an arc-shaped groove.

[0014] As a preferred technical scheme of the present application, the outer arc surface of the arc-shaped groove is sleeved with a sealing washer, the inner arc surface of the sealing lip is provided with a hollow groove, the hollow groove is movably connected with the pump shaft, the one side surface of the sealing lip is provided with a pressing end, and one end of the pressing end is attached to the surface of the pump shaft.

[0015] (Three) beneficial effects

[0016] 1. The sealing lip connected inside the framework not only increases the reliability of the sealing, but also tightly attaches the outer arc surface to the inner arc surface of the primary shaft sleeve, so that the relative movement between the components is prevented, the mutual collision in the transportation process is prevented, the deformation or damage of the equipment is prevented, and the reliability of the sealing device is affected.

[0017] 2. The spring and the push ring in the inner cavity of the sealing shaft sleeve and the sealing disc body always push the static ring to press the moving ring, so that the two are tightly attached to each other, the reliability of the sealing is ensured, the O-shaped sealing ring is installed between the primary shaft sleeve and the secondary shaft sleeve, and the reliability of the sealing is further ensured.

[0018] 3. By supporting section away from the ladder end, and the force under the hook-shaped section will be taken out from the plug-in slot, thus will facilitate the sealing lip and the skeleton away, so as to realize the self-disassembly operation of the sealing part, not only will not damage the sealing lip, but also does not need to reserve the disassembly space for the disassembly part or tool operation in the inside of the device to be sealed, which is beneficial to realize the simplicity of the disassembly operation of the sealing part in the sealing system. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a front end overall structure diagram of the centrifugal pump sealing device convenient to install and replace;

[0020] Figure 2 It is a main shaft sleeve overall side section structure diagram of the centrifugal pump sealing device convenient to install and replace;

[0021] Figure 3 It is a whole vertical section structure diagram of the centrifugal pump sealing device convenient to install and replace;

[0022] Figure 4 It is a skeleton and sealing lip connection section structure diagram of the centrifugal pump sealing device convenient to install and replace;

[0023] Figure 5 It is a main shaft disassembly structure diagram of the centrifugal pump sealing device convenient to install and replace.

[0024] In the drawings:

[0025] 1, main shaft sleeve; 2, auxiliary shaft sleeve; 3, concave groove; 4, sealing shaft sleeve; 5, static ring; 6, dynamic ring; 7, sealing disc body; 8, cavity groove; 9, spring; 10, push ring; 11, fastening screw; 12, O-shaped sealing ring; 13, pump shaft; 14, ladder end; 15, skeleton; 151, supporting section; 152, abutting section; 153, hook-shaped section; 16, sealing lip; 161, plug-in slot; 162, arc-shaped slot; 163, empty slot; 164, pressing end; 17, sealing washer. DETAILED DESCRIPTION

[0026] 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. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0027] The present application provides a centrifugal pump sealing device convenient to install and replace, such as Figures 1 to 5As shown, including the main shaft sleeve 1, the outer arc surface of the main shaft sleeve 1 is movably sleeved with the secondary shaft sleeve 2, the inner arc surface of the secondary shaft sleeve 2 is provided with a concave groove 3 at one side edge, the outer arc surface of the secondary shaft sleeve 2 is provided with a sealing sleeve 4 at one side edge, the sealing sleeve 4 is movably sleeved with a static ring 5 at one side, the static ring 5 is movably connected with a dynamic ring 6 at one side, the inner arc surface of the dynamic ring 6 is movably sleeved on the secondary shaft sleeve 2, the sealing disc body 7 is fixedly installed at one side of the secondary shaft sleeve 2, the cavity groove 8 is arranged between the sealing disc body 7 and the secondary shaft sleeve 2, the inner arc surface of the cavity groove 8 is movably sleeved with a spring 9, one end of the spring 9 is connected to the inner side wall of the sealing disc body 7, the other end of the spring 9 is connected with a push ring 10, one side of the push ring 10 abuts against the dynamic ring 6, the sealing disc body 7 is provided with a fastening screw 11 at the top of one side surface, the number of the fastening screw 11 is several, and the fastening screw 11 is evenly distributed on the sealing disc body 7 in the form of annular array, the concave groove 3 of the inner arc surface of the secondary shaft sleeve 2 is fixedly sleeved with an O-shaped sealing ring 12, the inner arc surface of the O-shaped sealing ring 12 is movably connected with the main shaft sleeve 1, the inner arc surface of the main shaft sleeve 1 is provided with a shaft hole, and the shaft hole is connected with a pump shaft 13.

[0028] The outer arc surface of the main shaft sleeve 1 is provided with the sealing sleeve 4, the sealing sleeve 4 and the secondary shaft sleeve 2 are installed with the fastening screw 11, the fastening screw 11 is fixedly connected with the main shaft sleeve 1, when the pump shaft 13 is inserted into the empty groove 163 inside the sealing lip 16, when the pump shaft 13 contacts the inner arc surface of the sealing lip 16, because the diameter of the pump shaft 13 is greater than the reserved diameter of the empty groove 163, and the sealing lip 16 has elasticity, therefore, the inside of the sealing lip 16 expands and compresses the space inside the insertion groove 161, after the inside space of the insertion groove 161 is compressed, the hook-shaped section 153 connected is tightly abutted, the compressed space is squeezed up and down the skeleton 15, so that the skeleton 15 does not separate during the operation of the pump body, and the support section 151 on the skeleton 15 is tightly fitted on the inner arc surface of the main shaft sleeve 1 by expansion, so that the relative movement between each component does not occur, preventing mutual collision during transportation, deforming or damaging the equipment, affecting the reliability of the sealing device, and the pump does not need to remove the skeleton 15 and the sealing lip 16 during operation, and will not affect the operation of the equipment, when the main shaft sleeve 1 and the secondary shaft sleeve 2 rotate together, preventing the centrifugal pump from sliding out of the sleeve due to loose bolts during operation.

[0029] The main shaft sleeve 1 rotates, the secondary shaft sleeve 2 and the sealing disc body 7 rotate together, the sealing sleeve 4 and the spring 9 and the push ring 10 in the inner cavity of the sealing disc body 7 always push the static ring 5 to compress the dynamic ring 6, so that the two are tightly fitted, ensuring the reliability of the sealing, the main shaft sleeve 1 and the secondary shaft sleeve 2 are respectively installed with the O-shaped sealing ring 12, further ensuring the reliability of the sealing.

[0030] The inner arc surface side of the main shaft sleeve 1 is provided with a stepped end 14, the upper surface of the stepped end 14 is movably connected with a framework 15, the framework 15 is provided with a supporting section 151 near the inner arc surface of the main shaft sleeve 1, the side of the framework 15 away from the supporting section 151 is provided with an abutting section 152, the abutting section 152 abuts the surface of the pump shaft 13, the inner arc surface of the framework 15 is provided with a hook-shaped section 153, one end of the hook-shaped section 153 is movably connected with a sealing lip 16, the outer arc surface side of the sealing lip 16 is provided with an insertion slot 161, the inner arc surface of the insertion slot 161 is movably connected with the hook-shaped section 153, the outer arc surface of the sealing lip 16 is provided with an arc-shaped slot 162, the arc-shaped slot 162 is sleeved with a sealing washer 17, the inner arc surface of the sealing lip 16 is provided with an empty slot 163, the empty slot 163 is movably connected with the pump shaft 13, the surface of one side of the sealing lip 16 is provided with a pressing end 164, one end of the pressing end 164 abuts the surface of the pump shaft 13.

[0031] When the sealing washer inside needs to be replaced, the framework 15 is applied with a force to the lower end of the abutting section 152, at this time, the supporting section 151 will no longer abut the inner arc surface of the main shaft sleeve 1, so that the supporting section 151 is separated from the stepped end 14, and under the action of the force, the hook-shaped section 153 will be taken out from the insertion slot 161, thereby the sealing lip 16 and the framework 15 are separated, so that the self-disassembly operation of the sealing component is realized, not only the sealing lip 16 will not be damaged, but also there is no need to reserve a disassembly space in the inside of the device to be sealed for the disassembly component or tool to operate, which is beneficial to realize the simplicity, integrity, economy and universality of the disassembly operation of the sealing component in the sealing system, and can significantly improve the work efficiency of replacing and maintaining the sealing component.

[0032] The above merely describes a preferred embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A centrifugal pump seal assembly which is easily replaced and installed, comprising a main shaft sleeve (1), characterized in that: The outer arc surface of the main shaft sleeve (1) movably sleeves the auxiliary shaft sleeve (2), the inner arc surface of the auxiliary shaft sleeve (2) is provided with a concave groove (3) at one side edge, the outer arc surface of the auxiliary shaft sleeve (2) is provided with a sealing sleeve (4) at one side edge, one side of the sealing sleeve (4) movably sleeves a static ring (5), one side of the static ring (5) movably overlaps a dynamic ring (6), the inner arc surface of the dynamic ring (6) movably sleeves the auxiliary shaft sleeve (2), one side of the auxiliary shaft sleeve (2) fixedly installs a sealing disc body (7), the sealing disc body (7) and the auxiliary shaft sleeve (2) are provided with a cavity groove (8), the inner arc surface of the cavity groove (8) movably sleeves a spring (9), one end of the spring (9) overlaps the inner side wall of the sealing disc body (7), the other end of the spring (9) overlaps a push ring (10).

2. A centrifugal pump seal assembly for easy replacement according to claim 1, wherein: One side of the push ring (10) abuts with the dynamic ring (6), the top of one side surface of the sealing disc body (7) is provided with a fastening screw (11), the number of the fastening screw (11) is several, and the fastening screw (11) is evenly distributed on the sealing disc body (7) in the form of annular array.

3. A centrifugal pump seal assembly for easy replacement according to claim 2, wherein: The concave groove (3) of the inner arc surface of the auxiliary shaft sleeve (2) movably sleeves an O-shaped sealing ring (12), the inner arc surface of the O-shaped sealing ring (12) movably connects with the main shaft sleeve (1), the inner arc surface of the main shaft sleeve (1) is provided with a shaft hole, the inside of the shaft hole is connected with a pump shaft (13).

4. A centrifugal pump seal assembly for easy replacement according to claim 3, wherein: One side of the inner arc surface of the main shaft sleeve (1) is provided with a stepped end (14), the upper surface of the stepped end (14) movably overlaps a framework (15), the framework (15) is provided with a support section (151) near the inner arc surface of the main shaft sleeve (1).

5. A centrifugal pump seal assembly for easy replacement according to claim 4, wherein: One side of the framework (15) away from the support section (151) is provided with an abutting section (152), the abutting section (152) abuts on the surface of the pump shaft (13), the inner arc surface of the framework (15) is provided with a hook-shaped section (153), one end of the hook-shaped section (153) movably clamps a sealing lip (16).

6. A centrifugal pump seal assembly for easy replacement according to claim 5, wherein: One side of the outer arc surface of the sealing lip (16) is provided with a plug-in groove (161), the inner arc surface of the plug-in groove (161) movably clamps with the hook-shaped section (153), the other side of the outer arc surface of the sealing lip (16) is provided with an arc-shaped groove (162).

7. A centrifugal pump seal assembly for easy replacement as defined in claim 6 wherein: The outer arc surface of the arc-shaped groove (162) sleeves a sealing washer (17), the inner arc surface of the sealing lip (16) is provided with a hollow groove (163), the hollow groove (163) movably connects with the pump shaft (13), one side surface of the sealing lip (16) is provided with a pressing end (164), one end of the pressing end (164) is attached to the surface of the pump shaft (13).

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