Container type double-end-face mechanical sealing device

Abstract

The utility model discloses a packaging type double-end-face mechanical sealing device which comprises a main sealing assembly and an auxiliary sealing assembly, the main sealing assembly comprises a driving ring and a main static ring, the auxiliary sealing assembly comprises an auxiliary moving ring and an auxiliary static ring, the driving ring and the auxiliary moving ring are both fixed to a shaft sleeve, the main static ring and the auxiliary static ring are both connected with a static ring seat, and a water cooling cavity is formed in the static ring seat. The main static ring and the auxiliary static ring are arranged in the water cooling cavity, the main static ring is attached to the end face of the driving ring, the auxiliary static ring is attached to the end face of the auxiliary moving ring, and the main static ring and the auxiliary static ring are elastically matched. And flushing liquid is injected into the water cooling cavity through a water cooling channel arranged on the static ring seat. The primary sealing of a medium is formed through the cooperation of the main sealing assembly and the auxiliary sealing assembly; the water cooling cavity is arranged, flushing liquid is injected through the external circulating pump to form secondary sealing on media, even if the media in the pump head permeate into the pump body through the sealing assembly, the media can be cleaned by the flushing liquid, and meanwhile sealing failure caused by solidification and blockage of the media at the position of the sealing assembly is prevented.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the end face sealing technical field of rotor pump, concretely relates to a set type double end face mechanical sealing device. BACKGROUND

[0002] Rotor pump refers to the pump that changes the working volume through the relative movement between rotor and pump body, and then increases the energy of liquid. Mechanical seal refers to the device that prevents fluid leakage by at least one pair of end faces perpendicular to the rotation axis under the action of fluid pressure and compensation mechanism elastic force (or magnetic force) and the cooperation of auxiliary seal.

[0003] The traditional end face seal directly seals the whole pump head cavity, the impact pressure of medium on the sealing component is large, the sealing failure is easily caused, and once the medium leakage of mechanical seal occurs, the medium is more easily blocked at the sealing position, the service life of the sealing end is affected, therefore, the mechanical seal structure needs to be improved; in addition, the position at the sealing end face needs to be kept sliding, the position is easily worn out during the long-term use, and the existing sealing structure needs to replace the dynamic ring part, so that the overall cost is relatively high.

[0004] A double end face mechanical sealing device of a rotor pump is disclosed in Chinese patent publication No. CN203081747U, which comprises a main sealing structure and a secondary sealing structure. The main sealing structure comprises a rotating shaft arranged on a pump body, a sealing seat fixed on an end face of the pump body, a first dynamic ring arranged in a shaft hole of the pump body and linked with the rotating shaft in a circumferential direction, a dynamic ring seat fixed with the first dynamic ring, a first static ring arranged outside the rotating shaft, and a first spring arranged outside the rotating shaft. The secondary sealing structure comprises a second dynamic ring linked with the rotating shaft in a circumferential direction, a second static ring arranged outside the rotating shaft, and a second spring. An end face of the second dynamic ring is pressed and fitted on an end face of the second static ring by the second spring, a lower end of the second spring abuts against the second static ring, and the other end abuts against the sealing seat. One end of the first spring abuts against an end face of the dynamic ring seat, and the other end abuts against an end face of a rotor of the rotor pump. The dynamic and static rings of the double end face mechanical sealing device of the rotor pump are pressed and fitted by the spring, and a small amount of medium (material) still seeps out from the gap. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiencies of the prior art, the utility model provides a set type double end face mechanical sealing device to solve the leakage problem of the existing rotor pump mechanical sealing device. The utility model can be realized by the following specific technical solutions:

[0006] The one set type double end face mechanical sealing device comprises a main sealing assembly and a secondary sealing assembly, the main sealing assembly comprises a driving ring and a static ring, the secondary sealing assembly comprises a secondary driving ring and a secondary static ring, the driving ring and the secondary driving ring are fixed with a shaft sleeve, the static ring and the secondary static ring are connected with a static ring base, a water cooling cavity is arranged in the static ring base, the static ring and the secondary static ring are arranged in the water cooling cavity, the end faces of the static ring and the driving ring are attached, the end faces of the secondary static ring and the secondary driving ring are attached, and the static ring and the secondary static ring are elastically matched; and the flushing liquid is injected into the water cooling cavity through the water cooling channel arranged on the static ring base.

[0007] Further, the static ring base is fixedly arranged on a base connected between the pump head and the pump body, a water cooling pipeline is arranged on the base, one end of the water cooling pipeline is communicated with the water cooling channel, and the other end is communicated with a circulating pump outside.

[0008] Further, the opposite sides of the static ring and the secondary static ring are provided with static ring stop washers, and springs are arranged between the two static ring stop washers.

[0009] Further, a first sealing ring is arranged between the static ring and the static ring base; a second sealing ring is arranged between the secondary static ring and the static ring base, and the first sealing ring and the second sealing ring are perfluoroether O-shaped rings.

[0010] Further, a third sealing ring is arranged between the driving ring and the shaft sleeve, and a fourth sealing ring is arranged between the secondary driving ring and the shaft sleeve, and the third sealing ring and the fourth sealing ring are perfluoroether O-shaped rings.

[0011] Further, a secondary sealing driving ring base is arranged on the side, away from the secondary static ring, of the secondary driving ring, and is fixed with the static ring base through buckles.

[0012] Compared with the prior art, the utility model has the following advantages:

[0013] (1) The cooperation of the main sealing assembly and the secondary sealing assembly forms a primary sealing for the medium; the water cooling cavity is arranged to inject flushing liquid into the water cooling cavity through the external circulating pump to form a secondary sealing for the medium, so that even if the medium in the pump head seeps into the pump body through the sealing assembly, the flushing liquid can clean the medium, and the medium is prevented from solidifying and blocking the sealing assembly to cause sealing failure.

[0014] (2) The sealing device is a set type, can be completely assembled and debugged in the factory, reduces the on-site installation time and complexity, and is simple and fast to replace on site without a complicated adjustment process.

[0015] (3) The main sealing assembly and the secondary sealing assembly share a set of springs, the structure is more compact, the number of components is reduced, the failure points are reduced, the manufacturing cost and the maintenance cost are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the internal structure schematic view of the sealing device of the utility model;

[0017] Figure 2 It is the structure schematic view of the sealing device of the utility model;

[0018] Figure 3 It is the utility model Figure 2 The section view at A-A.

[0019] In the drawing: 1 - secondary sealing dynamic ring seat, 2 - shaft sleeve, 3 - driving ring, 4 - static ring, 5 - secondary dynamic ring, 6 - secondary static ring, 7 - static ring seat, 71 - water cooling channel, 8 - base, 81 - water cooling pipeline, 9 - static ring stop washer, 10 - spring, 11 - first sealing ring, 12 - second sealing ring, 13 - third sealing ring, 14 - fourth sealing ring, 15 - buckle. Specific implementation

[0020] In order to make the purpose, technical scheme and advantage of the application clearer, the application is further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and not to limit the application.

[0021] As Figures 1-3 shown, a set type double-end-face mechanical sealing device includes a primary sealing assembly and a secondary sealing assembly, the primary sealing assembly includes a driving ring 3 and a static ring 4, the secondary sealing assembly includes a secondary dynamic ring 5 and a secondary static ring 6, the driving ring 3 and the secondary dynamic ring 5 are fixed with the shaft sleeve 2, the static ring 4 and the secondary static ring 6 are connected with the static ring seat 7, a water cooling cavity is arranged in the static ring seat 7, the static ring 4 and the secondary static ring 6 are arranged in the water cooling cavity, the end faces of the static ring 4 and the driving ring 3 are attached, the end faces of the secondary static ring 6 and the secondary dynamic ring 5 are attached, and the static ring 4 and the secondary static ring 6 are elastically matched; the water cooling channel 71 arranged on the static ring seat 7 is used to inject flushing liquid into the water cooling cavity.

[0022] Specifically, the static ring seat 7 is fixedly arranged on the base 8 connected between the pump head and the pump body, the water cooling pipeline 81 is arranged on the base 8, one end of the water cooling pipeline 81 is communicated with the water cooling channel 71, and the other end is connected with an external circulating pump. The introduction of the flushing liquid not only can cool the sealing surface, but also can prevent external pollutants from entering the sealing area, and further protect the sealing assembly from damage.

[0023] It can be understood that the cooperation of the primary sealing assembly and the secondary sealing assembly of the application (i.e. the attachment of the driving ring 3 and the static ring 4, the attachment of the secondary dynamic ring 5 and the secondary static ring 6, the formation of a closed space, and the prevention of fluid passing through) forms a primary sealing for the medium; the water cooling cavity is arranged to inject flushing liquid into the water cooling cavity through the external circulating pump to form a secondary sealing for the medium, so that even if the medium in the pump head penetrates into the pump body through the sealing assembly, it can also be cleaned by the flushing liquid, and meanwhile, the medium is prevented from solidifying and blocking at the sealing assembly to cause sealing failure.

[0024] The auxiliary sealing dynamic ring seat 1 is arranged on the side of the auxiliary dynamic ring 5 away from the auxiliary static ring 6 and is fixed with the static ring seat 7 through the buckle 15. The opposite sides of the main static ring 4 and the auxiliary static ring 6 are both arranged with static ring stop washers 9, and a spring 10 is arranged between the two static ring stop washers 9, which is preferably a wave spring. The main sealing assembly and the auxiliary sealing assembly share a set of springs, which is more compact in structure, reduces the number of components and reduces the failure points, and reduces the manufacturing cost and the maintenance cost.

[0025] The first sealing ring 11 is arranged between the main static ring 4 and the static ring seat 7, and the second sealing ring 12 is arranged between the auxiliary static ring 6 and the static ring seat 7, and the first sealing ring 11 and the second sealing ring 12 are perfluoroether O-rings. The third sealing ring 13 is arranged between the main dynamic ring 3 and the shaft sleeve 2, and the fourth sealing ring 14 is arranged between the auxiliary dynamic ring 5 and the shaft sleeve 2, and the third sealing ring 13 and the fourth sealing ring 14 are perfluoroether O-rings. By arranging the perfluoroether O-ring, the corrosion of the sealing element by the chemical medium is effectively resisted, not only the sealing performance is improved, but also the service life is greatly prolonged.

[0026] The application is mainly applied to the lithium battery industry. The positive and negative electrode materials contain solid particles (the hardness can reach the hardness of ceramic materials, and the solid content is as high as 50%-80%), and the organic solvent NMP is a strong corrosive solvent. The mechanical sealing device of the application installs two single-end face seals back-to-back in an integrated sealing cavity to form a double-end face sealing system. The double-end face structure provides two layers of protection to prevent medium leakage, and is especially suitable for applications where any leakage is not allowed.

[0027] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A packaged double mechanical seal device, comprising a primary seal assembly and a secondary seal assembly, the primary seal assembly comprising a primary driving ring (3) and a primary stationary ring (4), the secondary seal assembly comprising a secondary driving ring (5) and a secondary stationary ring (6), the primary driving ring (3) and the secondary driving ring (5) are fixed with a shaft sleeve (2), the primary stationary ring (4) and the secondary stationary ring (6) are connected with a stationary ring seat (7), characterized in that, The static ring seat (7) is provided with a water cooling cavity, the main static ring (4) and the auxiliary static ring (6) are arranged in the water cooling cavity, the end face of the main static ring (4) and the driving ring (3) is attached, the end face of the auxiliary static ring (6) and the auxiliary driving ring (5) is attached, and the main static ring (4) and the auxiliary static ring (6) are elastically matched; the flushing liquid is injected into the water cooling cavity through the water cooling channel (71) arranged on the static ring seat (7).

2. A packaged double mechanical seal assembly as claimed in claim 1, wherein, The static ring seat (7) is fixedly arranged on the base (8) between the pump head and the pump body, the water cooling pipeline (81) is arranged on the base (8), one end of the water cooling pipeline (81) is communicated with the water cooling channel (71), and the other end is communicated with the circulating pump.

3. A packaged double mechanical seal assembly as claimed in claim 1, wherein, The opposite sides of the main static ring (4) and the auxiliary static ring (6) are provided with static ring stop washers (9), and the spring (10) is arranged between the two static ring stop washers (9).

4. A packaged double mechanical seal assembly according to claim 3, wherein, The first sealing ring (11) is arranged between the main static ring (4) and the static ring seat (7), the second sealing ring (12) is arranged between the auxiliary static ring (6) and the static ring seat (7), and the first sealing ring (11) and the second sealing ring (12) are perfluoroether O-shaped rings.

5. A packaged double mechanical seal assembly according to any one of claims 1 to 4, wherein: The third sealing ring (13) is arranged between the driving ring (3) and the shaft sleeve (2), the fourth sealing ring (14) is arranged between the auxiliary driving ring (5) and the shaft sleeve (2), and the third sealing ring (13) and the fourth sealing ring (14) are perfluoroether O-shaped rings.

6. A packaged double mechanical seal assembly according to any one of claims 1-4, wherein: The auxiliary sealing driving ring seat (1) is arranged on the side, away from the auxiliary static ring (6), of the auxiliary driving ring (5), and is fixed with the static ring seat (7) through the buckle (15).

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