Novel double mechanical seal

Abstract

The utility model relates to a novel double mechanical seal, which comprises a mechanical seal sleeve and a mechanical seal seat sleeved outside the mechanical seal sleeve, a plurality of blades are uniformly distributed on the outer circumference of the mechanical seal sleeve, the blades extend along the axial direction of the mechanical seal sleeve, a boss is arranged on the inner circumference of the mechanical seal seat, the boss is provided with two water retaining rings, and the water retaining rings are arranged on the water retaining rings. A boss is arranged on the machine sealing sleeve, two water retaining rings are arranged on the boss, the two water retaining rings are distributed at intervals in the axial direction of the machine sealing sleeve, a water tank is formed between the two water retaining rings, a water outlet is formed in the water tank, water inlets are formed in the two side faces of the boss, and the water inlets are communicated with the water outlet. The novel double mechanical seal is high in practicability, low in cost, long in service life, simple in structure, easy to achieve, high in cooling water circulation stability, free of leakage and capable of improving field environmental sanitation.

Description

TECHNICAL FIELD

[0001] The utility model relates to mechanical seal equipment technical field, concretely relates to a novel double machine seal. BACKGROUND

[0002] The centrifugal pump double machine seal is an upgrade replacement product of the single-face seal of the centrifugal pump, and is specially used for solving the problems of easy leakage and short service life of the single-face machine seal, and is suitable for conveying high-viscosity and scale-forming media.

[0003] At present, in the production and use, the double machine seal used by the centrifugal pump in the workshop is provided with an independent cooling system in order to cool the heat of the double machine seal, to enable the double machine seal to normally operate and prolong the service life.

[0004] The double machine seal cooling system is composed of a machine seal, a cooling circulating water tank and a cooling water coil pipe, and the double machine seal and the cooling circulating water tank are connected by two water pipes.

[0005] The principle of operation of the double machine seal cooling system is to utilize the liquid thermal siphon phenomenon to enable the system cooling circulating water to circulate and cool the heat of the sealing ring of the double machine seal. When the circulating cooling water circulates and cools the double machine seal, the system is filled with the double machine seal cooling circulating water, and when the pump operates, the static and dynamic sealing rings of the double machine seal rub to generate heat. The heat heats the cooling circulating water in the inner cavity of the double machine seal, the temperature of the circulating cooling water is increased, the double machine seal cooling circulating water moves upward, enters the double machine seal circulating water tank through the connecting water pipe, the cooling coil pipe in the double machine seal circulating water tank reduces the temperature of the high-temperature double machine seal cooling circulating water, and the low-temperature double machine seal cooling circulating water flows back to the inner cavity of the double machine seal through the connecting pipe due to the potential energy difference, so that the circulating flow state is formed, and the heat of the circulating cooling water cooling the double machine seal is achieved.

[0006] For the double machine seal installed on the centrifugal pump, the circulating cooling by utilizing the principle of thermal siphon is unstable in the actual operation process, the effect is poor, the double-face machine seal is prone to overheating and damage leakage, the service life of the machine seal is short, and the production cost is increased.

[0007] The normal circulation of the cooling water of the double-face machine seal becomes a key problem to be solved. In order to solve such problems, a magnetic pump is additionally increased to forcibly circulate and cool the double machine seal, but this method is too high in cost and is not widely applied. CONTENT OF THE UTILITY MODEL

[0008] In view of the deficiencies of the prior art, the utility model provides a novel double machine seal which is low in cost and high in stability of cooling water circulation.

[0009] To achieve the above objectives, the novel double mechanical seal of this utility model has the following technical solution: it includes a mechanical seal sleeve and a mechanical seal seat fitted outside the mechanical seal sleeve. Several blades are evenly distributed on the outer circumference of the mechanical seal sleeve, and the blades extend along the axial direction of the mechanical seal sleeve. A boss is provided on the inner circumference of the mechanical seal seat. The boss is provided with two water-blocking rings, which are spaced apart along the axial direction of the mechanical seal sleeve. A water groove is formed between the two water-blocking rings. A water outlet is provided in the water groove. Water inlets are provided on both sides of the boss, and the water inlets are connected to the water outlets.

[0010] Preferably, a water-retaining sill is provided on one side of the water outlet, the water-retaining sill being flush with the water-retaining ring, and a slope is provided on the other side of the water outlet.

[0011] Preferably, the outer circumference of the machine seal has 4 to 10 blades evenly distributed.

[0012] Preferably, the height of the water-retaining ring is 0.8 to 1.2 mm.

[0013] Preferably, the size of both the inlet and outlet is 9 to 12 mm.

[0014] This utility model presents a novel double mechanical seal that is highly practical, low in cost, extends the service life of double-sided mechanical seals, has a simple and easy-to-implement structure, provides strong cooling water circulation stability, and eliminates leakage, thus improving on-site hygiene. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the embodiments are briefly introduced below.

[0016] Figure 1 This is a cross-sectional view of the novel double mechanical seal of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the novel double-machine seal sleeve of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the novel double-machine seal middle machine seal seat of this utility model. Detailed Implementation

[0019] To more clearly describe the technical content of this utility model, the following description is provided in conjunction with specific embodiments.

[0020] like Figures 1 to 3 The illustration shows a specific embodiment of the novel dual mechanical seal of this utility model, which solves the problems of unstable circulation, poor cooling effect, and short lifespan of dual mechanical seals. The dual mechanical seal includes a mechanical seal sleeve 1 and a mechanical seal base 2 fitted over the mechanical seal sleeve 1.

[0021] like Figure 1 and Figure 2 As shown, several blades 4 are evenly distributed on the outer periphery of the mechanical seal 1. The blades extend along the axial direction of the mechanical seal 1. In this embodiment, six blades are evenly distributed on the outer periphery of the mechanical seal 1, but other numbers of blades can also be provided as needed.

[0022] like Figure 1 and Figure 3 As shown, the mechanical seal base 2 has a boss on its inner circumference, and the boss has two water-blocking rings 7. The two water-blocking rings 7 are spaced apart along the axial direction of the mechanical seal sleeve 1, forming a water groove 3 between the two water-blocking rings 7. A water outlet 5 is provided in the water groove 3. Water inlets 6 are provided on both sides of the boss to facilitate water outlet from both sides. The water inlets 6 and the water outlets 5 form a symmetrical 180° angle. Water exits from the water groove of the boss, while water enters from the bottom of the boss and flows into both sides of the mechanical seal cavity through the water inlets. In this embodiment, the height of the water-blocking rings 7 is 1.0 mm. The size of the water inlets and outlets is 9 to 12 mm, preferably 9 mm. Based on this novel double mechanical seal, the liquid is transported by the centrifugal force generated by the rotation of the blades and flows into the water outlet pipe through the flow channel of the water groove, thereby realizing the cooling water circulation cooling of the double-sided mechanical seal.

[0023] In this embodiment, as Figure 3 As shown, a water-blocking sill is provided on one side of the water outlet, and the water-blocking sill is flush with the water-blocking ring. A slope is provided on the other side of the water outlet to facilitate the formation of vortices, similar to the vortex groove of the pump casing.

[0024] Accordingly, a φ16 rigid pipe is used to connect the water tank.

[0025] The SPC workshop of Fangchenggang Yihai Soybean Industry Co., Ltd. was using an unmodified dual mechanical seal. The cooling water circulation was unstable, and leaks from the dual mechanical seal were frequent. Annual spare parts costs for the dual mechanical seal were 50,000 yuan, and maintenance costs were 15,000 yuan. Maintenance caused production instability, impacting workshop capacity, reducing efficiency, and affecting the workshop environment. After using the new dual mechanical seal modified according to this utility model, no spare parts or maintenance costs were incurred. Production became stable, and the modified dual mechanical seal can self-circulate cooling water at a rate of 1.5 L / min, improving production efficiency and workplace hygiene.

[0026] This utility model presents a novel double mechanical seal that is highly practical, low in cost, extends the service life of double-sided mechanical seals, has a simple and easy-to-implement structure, provides strong cooling water circulation stability, and eliminates leakage, thus improving on-site hygiene.

[0027] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.

Claims

1. A novel dual-mechanical seal, characterized in that, The device includes a mechanical seal sleeve and a mechanical seal seat fitted over the mechanical seal sleeve. Several blades are evenly distributed on the outer circumference of the mechanical seal sleeve, and the blades extend along the axial direction of the mechanical seal sleeve. A boss is provided on the inner circumference of the mechanical seal seat. The boss is provided with two water-retaining rings, which are spaced apart along the axial direction of the mechanical seal sleeve and form a water groove between the two water-retaining rings. A water outlet is provided in the water groove. Water inlets are provided on both sides of the boss, and the water inlets are connected to the water outlets.

2. The novel dual-mechanical seal according to claim 1, characterized in that, A water-blocking sill is provided on one side of the water outlet, and the water-blocking sill is flush with the water-blocking ring. A slope is provided on the other side of the water outlet.

3. The novel dual-mechanical seal according to claim 1, characterized in that, The outer circumference of the machine seal has 4 to 10 blades evenly distributed.

4. The novel dual-mechanical seal according to claim 1, characterized in that, The height of the water-retaining ring is 0.8 to 1.2 mm.

5. The novel dual-mechanical seal according to claim 1, characterized in that, The size of the inlet and outlet is 9 to 12 mm.

Images