Marine fresh water pump mechanical seal

Abstract

The utility model discloses a mechanical seal for a marine fresh water pump, which relates to the technical field of marine fresh water pumps and comprises a driving shaft, a shaft sleeve sleeved on the outer side of the driving shaft, a connector matched with the back of a pump body, a gland fixedly connected with the connector through a hexagon socket cap screw, and a static ring seat on the outer side of the shaft sleeve. A static ring body is attached to the right side of the movable ring, the static ring body is installed in a groove of the static ring base, a baffle ring used for improving the matching and connecting effect with the static ring body is fixed to the outer side face of the movable ring, and an elastic check ring for a shaft is installed at the right end of the shaft sleeve. And sealing rings are arranged on the shaft sleeve, the left upper end of the moving ring, the right upper end of the static ring body, the upper surface of the static ring seat and between the gland and the connector. According to the marine fresh water pump mechanical seal, the static ring body and the movable ring are more stably attached through the baffle ring, the matching connection effect is improved, deviation is avoided, and the connection sealing performance of the shaft elastic check ring and the gland is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of marine fresh water pump, concretely to a marine fresh water pump mechanical seal. BACKGROUND

[0002] Mechanical seal is an important component of marine fresh water pump, which plays a role in preventing water leakage. The marine fresh water pump mechanical seal has a compact structure, is suitable for limited space on the ship, and has a double-floating structure of a static ring and a static ring seat, which has good follow-up compensation effect. In order to improve the use effect of the mechanical seal, various water pump mechanical seal structures are provided on the market.

[0003] A water pump mechanical seal structure is disclosed in Chinese Utility Model Patent No. CN216343009U, which comprises a static ring, a dynamic ring, and a spring. The static ring, dynamic ring, and spring are sequentially installed on the pump shaft of the water pump. An annular fixing sleeve is installed on the pump shaft. The dynamic ring is installed on one side of the annular fixing sleeve. The static ring is rotatably installed on the pump shaft and located on one side of the dynamic ring. The wear surface of the static ring is in contact with the wear surface of the dynamic ring. The static ring is fixedly connected to the pump body of the water pump. The inner wall of the side of the annular fixing sleeve away from the dynamic ring extends inwardly around the periphery. The pump shaft is a stepped shaft. An O-shaped sealing ring is installed between the shoulder of the pump shaft and the stopper. The spring is installed on the pump shaft and located on the side of the annular fixing sleeve away from the dynamic ring. The utility model can improve the sealing performance of the structure, effectively separate the dynamic ring and the static ring, prevent the mechanical seal of the water pump from failing, and ensure the normal operation of the water pump.

[0004] In combination with the existing scheme and actual production and processing, the existing marine fresh water pump mechanical seal is generally connected end to end, the end surface of the dynamic ring and the end surface of the static ring are generally horizontally butted, and the static ring body and the dynamic ring are prone to misalignment and slipping during high-speed selection of the drive shaft. Therefore, the matching connection effect needs to be improved. Therefore, we propose a marine fresh water pump mechanical seal to solve the above problems. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a marine fresh water pump mechanical seal to solve the above problems in the background art, in which the connection between the dynamic ring and the static ring is generally end to end, the end surface of the dynamic ring and the end surface of the static ring are generally horizontally butted, and the static ring body and the dynamic ring are prone to misalignment and slipping during high-speed selection of the drive shaft. The matching connection effect needs to be improved.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a marine fresh water pump mechanical seal, comprising a drive shaft and a shaft sleeve sleeved on the outside of the drive shaft, a coupling body cooperating with the back of the pump body and a gland fixedly connected by an internal hexagonal cylindrical head screw, a static ring seat on the outside of the shaft sleeve:

[0007] The groove of the shaft sleeve is provided with a dynamic ring, and the right side of the dynamic ring is provided with a static ring body;

[0008] The groove of the static ring seat is provided with a static ring body, the outer side of the dynamic ring is fixed with a blocking ring for improving the matching connection effect with the static ring body, the inner wall of the blocking ring is provided with the outer side of the static ring body, the screw hole of the gland is provided with an internal hexagonal cylindrical head screw for fixedly connecting the connecting body, the installation cavity of the inner end of the gland is fixed with a spring at equal angles, the end of the spring away from the gland is fixed with the static ring seat, the right end of the shaft sleeve is provided with a shaft elastic blocking ring, and the left upper end of the shaft sleeve, the right upper end of the static ring body, the upper surface of the static ring seat and the connecting body are all provided with sealing rings.

[0009] Preferably, the inside of the gland is provided with a screw hole at equal angles.

[0010] Preferably, the shaft elastic blocking ring is in an "L" shape in the longitudinal section.

[0011] Preferably, the outer end of the gland is provided with a sealing groove for connecting the shaft elastic blocking ring.

[0012] Compared with the prior art, the ship freshwater pump mechanical seal has the advantages that the static ring body and the dynamic ring are more stably matched by the blocking ring, the matching connection effect is improved, deviation is avoided, and the connection sealing property of the shaft elastic blocking ring and the gland is improved.

[0013] 1. The outer side of the dynamic ring is fixed with a blocking ring for improving the matching connection effect with the static ring body, and the inner wall of the blocking ring is provided with the outer side of the static ring body, so that the static ring body and the dynamic ring are more stably matched by the blocking ring, the matching connection effect is improved, and deviation is avoided.

[0014] 2. The right end of the shaft sleeve is provided with a shaft elastic blocking ring, the outer end of the gland is provided with a sealing groove for connecting the shaft elastic blocking ring, and the shaft elastic blocking ring in an "L" shape in the longitudinal section can be connected with the gland and the shaft sleeve, so that the connection sealing property of the shaft elastic blocking ring and the gland is improved.

[0015] 3. The screw hole of the gland is provided with an internal hexagonal cylindrical head screw for fixedly connecting the connecting body, the connecting body and the gland are connected through the internal hexagonal cylindrical head screw, and the gland and the connecting body are conveniently disassembled and assembled. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the shaft side section structure of the utility model;

[0017] Figure 2 It is a schematic view of the utility model Figure 1 enlarged structure at A;

[0018] Figure 3 It is the first shaft side structure schematic view of the utility model;

[0019] Figure 4 It is the second shaft side structure schematic view of the utility model;

[0020] Figure 5 It is the shaft elastic baffle and gland connection structure schematic view of the utility model.

[0021] In the figure: 1, shaft sleeve; 2, dynamic ring; 3, static ring body; 4, static ring seat; 5, gland; 6, spring; 7, shaft elastic baffle; 8, inner hexagonal cylindrical head screw; 9, sealing ring; 10, drive shaft; 11, baffle ring; 12, coupling body. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0023] Embodiment one: please refer to Figures 1-5 , the existing marine fresh water pump mechanical seal, when the drive shaft 10 high speed is selected, the static ring body 3 and the dynamic ring 2 are easy to dislocate, and the matching connection effect needs to be improved, in order to solve this technical problem, the embodiment discloses the following technical content;

[0024] A marine fresh water pump mechanical seal, including drive shaft 10 and the shaft sleeve 1 of drive shaft 10 outside, the coupling body 12 matched with the back of pump body and the gland 5 fixedly connected by the inner hexagonal cylindrical head screw 8 of coupling body 12, the static ring seat 4 of the outer side of shaft sleeve 1, as Figure 1 And Figure 2 Shown, the recess of shaft sleeve 1 installs dynamic ring 2, and the right side of dynamic ring 2 is attached with static ring body 3, the recess of static ring seat 4 installs static ring body 3, the outer side of dynamic ring 2 is fixed with the baffle ring 11 for improving the matching connection effect with static ring body 3, and the inner wall of baffle ring 11 is attached with the outer side of static ring body 3, the matching connection effect of static ring body 3 and dynamic ring 2 can be increased by using baffle ring 11, to avoid static ring body 3 and dynamic ring 2 dislocation;

[0025] As Figure 3 Shown, the screw hole of gland 5 installs the inner hexagonal cylindrical head screw 8 for fixedly connecting coupling body 12, can disassemble and assemble gland 5 and coupling body 12, as Figure 1 、 Figure 2 And Figure 5As shown, the spring 6 is fixed in the mounting cavity of the inner end of the gland 5 at an isometric angle, and the static ring seat 4 is fixed at the end of the spring 6 away from the gland 5. By installing the spring 6 between the gland 5 and the static ring seat 4, the spring 6 can drive the static ring body 3 and the dynamic ring 2 to abut each other to form a seal, and the spring 6 can also drive the dynamic ring 2 and the static ring body 3 to effectively separate, thereby preventing the mechanical seal of the water pump from failing and ensuring that the water pump can operate normally.

[0026] As shown in Figure 1 and Figure 2 , the sealing ring 9 is installed between the shaft sleeve 1, the upper left end of the dynamic ring 2, the upper right end of the static ring body 3, the upper surface of the static ring seat 4, and the coupling body 12 and the gland 5. The sealing ring 9 ensures sealing.

[0027] In the second embodiment, the technical content disclosed in the above embodiment is further improved. The connection sealing of the shaft elastic retainer 7 and the gland 5 needs to be improved. To solve this technical problem, the following technical content is disclosed. Please refer to Figure 1 and Figure 5 .

[0028] The shaft elastic retainer 7 is installed at the right end of the shaft sleeve 1, and the longitudinal section of the shaft elastic retainer 7 is in the shape of an "L". The outer end of the gland 5 is provided with a sealing groove for connecting the shaft elastic retainer 7. The shaft elastic retainer 7 connects the gland 5 and the shaft sleeve 1, thereby improving the connection sealing of the shaft elastic retainer 7 and the gland 5.

[0029] The above completes a series of operations of the mechanical seal of the ship freshwater pump. The contents not described in detail in the description belong to the existing technology known to those skilled in the art.

[0030] The standard parts used in the utility model can be purchased from the market. The special-shaped parts can be ordered according to the description and the drawings. The specific connection mode of each part adopts the conventional means such as bolts, rivets, and welding in the existing technology. The machinery, parts, and equipment adopt conventional models in the existing technology. The circuit connection adopts the conventional connection mode in the existing technology, which will not be described in detail here.

[0031] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for part of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A marine fresh water pump mechanical seal, comprising a drive shaft (10), a shaft sleeve (1) sleeved outside the drive shaft (10), a coupling body (12) matched with the back of the pump body, a gland (5) fixedly connected with the coupling body (12) through a hexagonal socket head screw (8), a static ring seat (4) outside the shaft sleeve (1), characterized in that: a dynamic ring (2) is installed in the groove of the shaft sleeve (1), and a static ring body (3) is attached to the right side of the dynamic ring (2); the static ring body (3) is installed in the groove of the static ring seat (4), a stop ring (11) for improving the matching connection effect with the static ring body (3) is fixed to the outer side surface of the dynamic ring (2), the inner wall of the stop ring (11) is attached to the outer side surface of the static ring body (3), a hexagonal socket head screw (8) for fixedly connecting the coupling body (12) is installed in the screw hole of the gland (5), a spring (6) is fixedly installed in the installation cavity of the inner end of the gland (5) at equal angles, the static ring seat (4) is fixed to the end of the spring (6) away from the gland (5), a shaft elastic retainer (7) is installed at the right end of the shaft sleeve (1), and a sealing ring (9) is installed between the shaft sleeve (1), the left upper end of the dynamic ring (2), the right upper end of the static ring body (3), the upper surface of the static ring seat (4), the gland (5) and the coupling body (12).

2. A mechanical seal for a marine fresh water pump according to claim 1, characterized in that: The screw hole is formed in the interior of the gland (5) at equal angles.

3. A mechanical seal for a marine fresh water pump as claimed in claim 1, wherein: The longitudinal section of the shaft elastic retainer (7) is in the shape of an "L".

4. A mechanical seal for a marine fresh water pump as claimed in claim 1, wherein: The outer end of the gland (5) is provided with a sealing groove for connecting the shaft elastic retainer (7).

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