CN203453109U

CN203453109U - Seal device for upper-pump-type submerged pump

Info

Publication number: CN203453109U
Application number: CN201320540931.1U
Authority: CN
Inventors: 王子新
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-09-02
Filing date: 2013-09-02
Publication date: 2014-02-26
Anticipated expiration: 2023-09-02

Abstract

The utility model relates to a seal device for an upper-pump-type submerged pump. The sealing device is a water-pump-added power seal assembly. When the submerged pump is in the operation state, transmission media around a frame seal ring penetrate through a shutdown seal ring under the action of guide blades and enter a water inlet of the water pump, the abrasion caused by the transmission media on the frame seal ring is reduced, the service life of the frame seal ring is prolonged, and the seal effect of a mechanical seal and even the whole water pump is also greatly improved. When the submerged pump is not in the operation state, the shutdown seal ring prevents the transmission media from entering the mechanical seal assembly. The seal device for the upper-pump-type submerged pump has the sand prevention function; due to the fact that the power seal assembly does not make direct contact with transmission liquid, the generated axial force is small, and power loss can not have a great influence on the power of the water pump.

Description

Upper pump formula diving Sealing used for pump

Technical field

The utility model relates to a kind of water pump gland, especially a kind of upper pump formula diving Sealing used for pump.

Background technique

At present, the existing QS of China, QJ series submerged pump, be motor under, pump is at combined type submersible pump upper, motor cavity Water, the inner chamber of its motor and bearing and be transferred and between liquid, adopt skeleton oil seal.Outside framework oil seal is simple in structure, but reliability is poor.Especially when carrying the more liquid of sand content, outside framework oil seal is quick-wearing, seal failure very, causes the liquid containing in a large number with silt to enter bearing and motor cavity, causes bearing damage, and the water pump life-span reduces.

QY series submerged pump also belongs to pump formula Submerged Motor Pumps, different from QS, QJ series, its motor inner oil filling type.Its motor inner oil filling type.QY series seal arrangement is combined into sealing system by one group of mechanical seal and an outside framework oil seal.Reason due to mechanical seal structure, its sealing effect is not good especially, always having a small amount of fed sheet of a media passes through, the fed sheet of a media that contains on a small quantity a large amount of silts enters after outside framework oil seal, the wearing and tearing of outside framework oil seal circle, erosion, the wearing and tearing containing husky medium are not still broken away from mechanical seal, especially containing mordant medium (as seawater), infringement to mechanical seal is more serious, finally causes the inefficacy of mechanical seal.Once mechanical seal was lost efficacy, external agency enters motor cavity, causes the insulation decline of motor until be zero, and electric pump motor electric leakage can not be used.The excessive leakage of oil in electric pump, can cause the pollution to environment again simultaneously.

According to statistics, upper pump formula submersible pump is 5% because sealing problem causes submersible pump spoilage, and electric water pump also only has 3 to 5 years working life.

Model utility content

In order to address the above problem, the utility model provides a kind of upper pump formula diving Sealing used for pump, between diversion shell and mechanical sealing assembly, install dynamic seal assembly additional, comprise dynamic seal housing, sub-propeller, back blades and guide vane, many guide vanes of the uniform making of inner chamber of dynamic seal housing.During submersible pump work, rotating shaft drives sub-propeller and back blades High Rotation Speed, gapped between back blades lower end and gland, because back blades is different in the linear velocity of diametric(al) rotation, the center portion in this gap, namely the region near backbone sealing ring is low pressure area, back blades periphery is zone of high pressure, the fed sheet of a media of backbone sealing ring periphery enters zone of high pressure by low pressure area, by the space of sub-propeller periphery, upwards flow again, under the effect of guide vane, fed sheet of a media is through parking sealer circle, enter pump intake, eliminate the pressure of fed sheet of a media to backbone sealing ring, improve the sealing effect of mechanical seal and even whole water pump.

The utility model solves the technological scheme that its technical problem adopts: a kind of upper pump formula diving Sealing used for pump, upper pump formula submersible pump be motor under, pump is at upper, motor cavity water-filling or oil-filled group formula submersible pump, the rotor of motor is fixed in rotating shaft, the stator of motor is fixed on motor casing, there is motor bearing seat the upper end of motor casing, and described motor bearing seat endoporus is connected with rotating shaft with bearing by oil sealing; Described motor bearing seat endoporus is connected with rotating shaft with bearing by oil sealing; There is mechanical sealing assembly the upper end of motor bearing seat, and described mechanical sealing assembly has housing, and there is upper end cap the upper end of housing, and there is lower end cap the lower end of housing; Described lower end cap is arranged on motor bearing seat by bolt, and there is gland the upper end of described housing, and described gland is connected with rotating shaft by backbone sealing ring; During the effect of outside framework oil seal, isolate the impact that dynamic seal assembly working pressure produces mechanical sealing assembly; Water pump is installed in the upper end of mechanical sealing assembly, and described water pump has diversion shell, and the inner chamber of described diversion shell has water pump vane, and described water pump vane is connected with rotating shaft by key; There is water intake the lower end of diversion shell, there is water outlet the upper end of diversion shell, dynamic seal assembly is set between diversion shell and mechanical sealing assembly, described dynamic seal assembly comprises, dynamic seal housing, sub-propeller and guide vane, described dynamic seal housing is the large toroidal shell in little, lower end, upper end, and there is the flange with seam the lower end of dynamic seal housing; Described flange is arranged on upper end cap by bolt, and the upper end of dynamic seal housing is connected with diversion shell by bolt; Described sub-propeller is arranged in rotating shaft by key, and many back blades of uniform making on the lower end surface of sub-propeller are gapped between described back blades lower end and gland; Many guide vanes of the uniform making of inner chamber of described dynamic seal housing, described guide vane and sub-propeller are gapped; Parking sealer circle is installed in the upper end of described dynamic seal housing, and described parking sealer circle is one-way sealing seal, and seal lip is close in rotating shaft.

The beneficial effects of the utility model are: pump formula diving Sealing used for pump on this, for water pump installs dynamic seal assembly additional, during submersible pump work, the fed sheet of a media of backbone sealing ring periphery passes parking sealer circle under the effect of guide vane, enter pump intake, reduce the wearing and tearing of fed sheet of a media to backbone sealing ring, improve the working life of backbone sealing ring, also greatly improved the sealing effect of mechanical seal and even whole water pump simultaneously, during diving air pump inoperative, parking sealer circle stops fed sheet of a media to enter mechanical sealing assembly; Upper pump formula diving Sealing used for pump has sand prevention function; Because dynamic seal assembly does not directly contact with carrying liquid, the axial force of generation is very little, and its power loss can not produce large impact to pump power.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Accompanying drawing 1 is structural representation of the present utility model.

The A-A sectional view that accompanying drawing 2 is Fig. 1.

In figure, 1. rotating shaft, 2. motor, 2-1. motor casing, 2-2. oil sealing, 2-3. bearing, 2-4. motor bearing seat, 3. mechanical sealing assembly, 3-1. lower end cap, 3-2. housing, 3-3. gland, 3-4. upper end cap, 4. backbone sealing ring, 5. dynamic seal assembly, 5-1. dynamic seal housing, 5-2. low pressure area, 5-3. sub-propeller, 5-4. back blades, 5-5. zone of high pressure, 5-6. guide vane, 6. water intake, 7. parking sealer circle, 8. axle sleeve, 9. water pump vane, 10. key, 11. diversion shell, 12. water outlets.

Embodiment

In the accompanying drawings, a kind of upper pump formula diving Sealing used for pump, upper pump formula submersible pump be motor under, pump is at upper, motor cavity water-filling or oil-filled group formula submersible pump, the rotor of motor is fixed in rotating shaft 1, the stator of motor is fixed on motor casing 2-1, there is motor bearing seat 2-4 the upper end of motor casing 2-1, and described motor bearing seat 2-4 endoporus is connected with rotating shaft 1 with bearing 2-3 by oil sealing 2-2; Described motor bearing seat 2-4 endoporus is connected with rotating shaft 1 with bearing 2-3 by oil sealing 2-2; There is mechanical sealing assembly 3 upper end of motor bearing seat 2-4, and described mechanical sealing assembly 3 has housing 3-2, and there is upper end cap 3-4 the upper end of housing 3-2, and there is lower end cap 3-1 the lower end of housing 3-2; It is upper that described lower end cap 3-1 is arranged on motor bearing seat 2-4 by bolt, and there is gland 3-3 the upper end of described housing 3-2, and described gland 3-3 is connected with rotating shaft 1 by backbone sealing ring 4; During the effect of outside framework oil seal 4, isolate the impact that dynamic seal assembly 5 working pressures produce mechanical sealing assembly 3; Water pump is installed in the upper end of mechanical sealing assembly 3, and described water pump has diversion shell 11, and the inner chamber of described diversion shell 11 has water pump vane 9, and described water pump vane 9 is connected with rotating shaft 1 by key 10; There is water intake 6 lower end of diversion shell 11, and there is water outlet 12 upper end of diversion shell 11, between diversion shell 11 and mechanical sealing assembly 3, dynamic seal assembly 5 is set; Described dynamic seal assembly 5 comprises, dynamic seal housing 5-1, sub-propeller 5-3 and guide vane 5-6, and described dynamic seal housing 5-1 is the large toroidal shell in little, lower end, upper end, there is the flange with seam the lower end of dynamic seal housing 5-1; It is upper that described flange is arranged on upper end cap 3-4 by bolt, and the upper end of dynamic seal housing 5-1 is connected with diversion shell 11 by bolt; Described sub-propeller 5-3 is arranged in rotating shaft 1 by key, and on the lower end surface of sub-propeller 5-3, many back blades 5-4 of uniform making, gapped between described back blades 5-4 lower end and gland 3-3; Many guide vane 5-6 of the uniform making of inner chamber of described dynamic seal housing 5-1, described guide vane 5-6 and sub-propeller 5-3 are gapped; Parking sealer circle 7 is installed in the upper end of described dynamic seal housing 5-1, and described parking sealer circle 7 is one-way sealing seal, and seal lip is close in rotating shaft 1.

As shown in Figure 1 and Figure 2, during upper pump formula submersible pump work, rotating shaft 1 drives sub-propeller 5-3 and back blades 5-4 High Rotation Speed, below back blades 5-4 and gapped between the gland 3-3 of mechanical sealing assembly 3, because back blades 5-4 is different in the linear velocity of diametric(al) rotation, the center portion in this gap, namely low near the region linear velocity of backbone sealing ring 4, become low pressure area; Back blades 5-4 outer contour speed is high, becomes zone of high pressure.The fed sheet of a media of backbone sealing ring 4 peripheries enters zone of high pressure by low pressure area, by the space of sub-propeller 5-3 periphery, upwards flow again, in the indoor generation of dynamic seal, upward pressure, add water intake 6 place's negative pressure, under the effect of guide vane 5-6, fed sheet of a media is opened the seal lip of parking sealer circle 7, through parking sealer circle 7, enters the water intake 6 of water pump.Seepage is all discharged by parking sealer circle 7 lips at the indoor liquid of dynamic seal, eliminates the pressure of fed sheet of a media to backbone sealing ring 4, improves the sealing effect of mechanical sealing assembly 3 and even whole water pump, the working life of pump formula submersible pump in prolongation.

During upper pump formula diving air pump inoperative, upper pump formula submersible pump sinks under water, because parking sealer circle 7 is one-way sealing seal, sealed tongue is tight-lipped to be attached in rotating shaft 1, the sealed tongue mouth of the hydraulic pressure compressing parking sealer circle 7 at pump intake 6 places, seal lip is tightly attached in rotating shaft 1, avoids entering dynamic seal assembly 5 with the fed sheet of a media of the grains of sand.

Upper pump formula diving Sealing used for pump has sand prevention function; when water pump is shut down; because dynamic seal housing 5-1 is the large toroidal shell in little, lower end, upper end, the grains of sand in fed sheet of a media are scattered in pump intake 6 places along parking sealer circle 7 and dynamic seal housing 5-1.During pump operation, the grains of sand that are scattered transfer out by water pump vane 9 with medium, reach the effect of sand prevention.

Because the sub-propeller 5-3 of dynamic sealing assembly 5 does not directly contact with carrying liquid, the axial force of generation is very little, and its power can not produce large impact to pump power.

Claims

1. go up pump formula diving Sealing used for pump for one kind, upper pump formula submersible pump be motor under, pump is at upper, motor cavity water-filling or oil-filled group formula submersible pump, the rotor of motor is fixed in rotating shaft (1), the stator of motor is fixed on motor casing (2-1), there is motor bearing seat (2-4) upper end of motor casing (2-1), and described motor bearing seat (2-4) endoporus is connected with rotating shaft (1) with bearing (2-3) by oil sealing (2-2); Described motor bearing seat (2-4) endoporus is connected with rotating shaft (1) with bearing (2-3) by oil sealing (2-2); There is mechanical sealing assembly (3) upper end of motor bearing seat (2-4), and described mechanical sealing assembly (3) has housing (3-2), and there is upper end cap (3-4) upper end of housing (3-2), and there is lower end cap (3-1) lower end of housing (3-2); It is upper that described lower end cap (3-1) is arranged on motor bearing seat (2-4) by bolt, and there is gland (3-3) upper end of described housing (3-2), and described gland (3-3) is connected with rotating shaft (1) by backbone sealing ring (4); Water pump is installed in the upper end of mechanical sealing assembly (3), and described water pump has diversion shell (11), and the inner chamber of described diversion shell (11) has water pump vane (9), and by key, (10 are connected with rotating shaft (1) described water pump vane (9); There is water intake (6) lower end of diversion shell (11), and there is water outlet (12) upper end of diversion shell (11), it is characterized in that: between diversion shell (11) and mechanical sealing assembly (3), dynamic seal assembly (5) is set; Described dynamic seal assembly (5) comprises, dynamic seal housing (5-1), sub-propeller (5-3) and guide vane (5-6), described dynamic seal housing (5-1) is the large toroidal shell in little, lower end, upper end, and there is the flange with seam the lower end of dynamic seal housing (5-1); It is upper that described flange is arranged on upper end cap (3-4) by bolt, and the upper end of dynamic seal housing (5-1) is connected with diversion shell (11) by bolt; It is upper that described sub-propeller (5-3) is arranged on rotating shaft (1) by key, and many back blades of uniform making (5-4) on the lower end surface of sub-propeller (5-3) are gapped between described back blades (5-4) lower end and gland (3-3); Many guide vanes of the uniform making of inner chamber (5-6) of described dynamic seal housing (5-1), described guide vane (5-6) is gapped with sub-propeller (5-3); Parking sealer circle (7) is installed in the upper end of described dynamic seal housing (5-1), and described parking sealer circle (7) is one-way sealing seal, and seal lip is close in rotating shaft (1).