High-temperature pump mechanical seal self-circulation cleaning mechanism

Abstract

The utility model discloses a self-circulation cleaning mechanism for a mechanical seal of a high-temperature pump, which belongs to the technical field of water pumps and comprises a suspension internally provided with a liquid conveying cavity, a movable cavity and an accommodating cavity; a pump shaft; the mechanical sealing assembly comprises a movable ring, a static ring and a gland. The pumping ring is arranged on the movable ring in a sleeving manner and seals the flow guide ring groove; one end of the conveying pipe is communicated with the liquid outlet hole, and the other end of the conveying pipe is communicated with the liquid inlet hole; high-temperature media in the movable cavity can be thrown out into the flow guide ring groove through the pumping ring by means of centrifugal force, so that power is provided for self-circulation of the high-temperature media, backflow and heat exchange are achieved through the conveying pipe, the effects of circulating cleaning and cooling are achieved, deposition and scaling can be avoided, and the service life of the high-temperature media is prolonged. The matching precision and the sealing performance between the moving ring and the static ring are guaranteed, the temperature of the mechanical sealing assembly can be lowered, and the sealing service life is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to water pump technical field, concretely relates to a high temperature pump machine seal self -circulation cleaning mechanism. BACKGROUND

[0002] In metallurgy, chemical industry, electric power, heating and many other industrial fields, high temperature pump is often used to complete the delivery of hot water or various high temperature medium because of its excellent high temperature resistance and stable operation characteristics.

[0003] In the prior art, a utility model patent application is disclosed in Chinese patent database, the application number is 201220435080.X, the application date is August 30, 2012, and the specific name is "a hot water circulating pump suspension body with heat dissipation function".The application can effectively ensure that the hot water circulating pump can be operated stably for a long time under the condition that no external cooling water is used, avoid using complex water-cooled structure, save water, and avoid pump operation accidents caused by insufficient cooling water or pipeline blockage.

[0004] But the technical scheme of above-mentioned has the deficiency in: high temperature medium is in the smooth passage of infusion cavity and enters the activity cavity, and then no longer circulates, so that the activity cavity, the surface of the moving ring and the surface of the static ring are prone to deposition and fouling, and since the deposits will fall off due to vibration, impact and other factors, the impurities will easily enter the machine seal surface, which will seriously damage the cooperation accuracy between the moving ring and the static ring, affect the sealing performance, and even cause the mechanical seal to completely fail. UTILITY MODEL CONTENTS

[0005] The utility model discloses a high temperature pump machine seal self -circulation cleaning mechanism, solve the technical problem that the activity cavity of hot water circulating pump in prior art is easy to scale.

[0006] The utility model discloses a high temperature pump machine seal self -circulation cleaning mechanism, including:

[0007] Suspension, inside having the infusion cavity, activity cavity and accommodating cavity that communicate in proper order, the inner peripheral surface of activity cavity is equipped with the flow guide ring groove, the groove bottom of flow guide ring groove is equipped with the liquid outlet, the inner wall of activity cavity is equipped with the liquid inlet, the liquid inlet is located the one side of flow guide ring groove close to accommodating cavity;

[0008] Pump shaft, passes through suspension and passes through infusion cavity, activity cavity and accommodating cavity in proper order;

[0009] Mechanical seal assembly, including

[0010] Moving ring, located in activity cavity, and is sleeved on pump shaft,

[0011] Static ring, is sleeved on the outer of pump shaft, and is matched with moving ring,

[0012] A cover is sleeved outside the static ring and is installed at the cavity bottom of the accommodating cavity;

[0013] A pumping ring is sleeved on the dynamic ring and seals the flow guide ring groove;

[0014] A conveying pipe is connected with the liquid outlet hole at one end and is connected with the liquid inlet hole at the other end.

[0015] The high-temperature medium in the movable cavity is thrown into the flow guide ring groove by the pumping ring through the centrifugal force, so that power is provided for the self-circulation of the high-temperature medium, and the backflow and heat exchange are realized through the conveying pipe, so that the functions of circulating cleaning and cooling are realized, the deposition and fouling are avoided, the cooperation precision and sealing performance between the dynamic ring and the static ring are ensured, the temperature of the mechanical seal assembly is reduced, and the sealing life is prolonged.

[0016] On the basis of the above technical scheme, the scheme of the application can be further improved as follows:

[0017] Preferably, the application further comprises:

[0018] A three-way pipe is connected with the liquid outlet hole at a first pipe opening and is connected with the conveying pipe at a second pipe opening;

[0019] An exhaust valve is connected with a third pipe opening of the three-way pipe at an inlet;

[0020] An exhaust pipe is connected with an outlet of the exhaust valve at one end. The application can conveniently and quickly exhaust the accumulated gas, so as to ensure the stable operation of the high-temperature pump, and the operation is simple and convenient, and the self-circulation is not interfered, and the use effect is good.

[0021] Preferably, the pumping ring comprises:

[0022] A support portion is installed on the dynamic ring;

[0023] A pump ring portion is arranged on one side of the support portion and is sleeved outside the dynamic ring;

[0024] The inner circumferential surface of the pump ring portion and the dynamic ring have a radial gap, and the outer circumferential surface of the pump ring portion seals the flow guide ring groove and is spaced apart from a plurality of through holes connected with the flow guide ring groove. The application can efficiently and stably drive the high-temperature medium to circulate and flow, and the structure is simple and compact, and is convenient to install and arrange.

[0025] Preferably, an annular inclined groove is arranged on the side of the pump ring portion close to the static ring. The application plays a flow guiding role and improves the pumping efficiency of the pump ring portion.

[0026] Preferably, a plurality of throttling grooves are arranged on the outer circumferential surface of the pump ring part, and the throttling grooves are arranged on both sides of the flow guide ring groove; by the arrangement, the closing effect of the outer circumferential surface of the pump ring part on the flow guide ring groove is improved, thereby ensuring the pumping effect and improving the circulation stability.

[0027] Preferably, the liquid outlet hole is arranged at the top of the suspension, and the liquid inlet hole is arranged at one side of the suspension; by the arrangement, the assembly, disassembly, maintenance, operation difficulty and operation efficiency are improved.

[0028] Preferably, the infusion cavity, the movable cavity and the accommodating cavity are coaxially arranged and have circular cross sections with gradually increasing diameters; by the arrangement, the turbulent flow and vortex flow of the fluid in the cavities are reduced, thereby reducing the energy loss, improving the fluid conveying efficiency, ensuring the smooth flow of the fluid in the cavities, reducing the impact and wear of the fluid on the cavity wall, prolonging the service life of the equipment, leaving space for the movement and installation of components, and ensuring the use effect.

[0029] Preferably, the utility model also comprises:

[0030] an end cover installed at the end of the suspension;

[0031] two oil retaining rings oppositely arranged, installed in the accommodating cavity and sleeved on the pump shaft, and one of the oil retaining rings abuts against the gland and the other oil retaining ring abuts against the end cover;

[0032] a plurality of bearings installed in the accommodating cavity and sleeved on the pump shaft and constrained between the two oil retaining rings; by the arrangement, the suspension and the pump shaft are rotationally connected, the structure is stable, the assembly and disassembly are facilitated, and the long-term operation stability is good.

[0033] By the above technical scheme, the utility model has the following beneficial effects:

[0034] 1. The pump ring can use the centrifugal force to throw the high-temperature medium in the movable cavity into the flow guide ring groove, thereby providing power for the self-circulation of the high-temperature medium, and the backflow and heat exchange are realized through the conveying pipe, thereby playing the roles of circulating cleaning and cooling and reducing the temperature, prolonging the sealing life.

[0035] 2. The three-way pipe, the exhaust valve and the exhaust pipe are arranged, the gas accumulated in the infusion cavity and the movable cavity can be discharged to a specified area, the accumulated gas can be discharged conveniently and quickly, thereby ensuring the operation stability of the high-temperature pump, the operation is simple and convenient, the self-circulation is not interfered, and the use effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings required to be used in the description of the specific embodiments or the prior art will be briefly introduced. Obviously, the drawings described below are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0037] Figure 1 The cross-sectional view of the high-temperature pump mechanical seal self-circulation cleaning mechanism described in the embodiments of the present application;

[0038] Figure 2 The structure of the suspension in the high-temperature pump mechanical seal self-circulation cleaning mechanism shown in Figure 1 The enlarged schematic view of A in the middle;

[0039] Figure 3 The structure of the suspension in the high-temperature pump mechanical seal self-circulation cleaning mechanism shown in Figure 1

[0040] Figure 4 The side view cross-sectional view of the suspension shown in Figure 3

[0041] Explanation of reference signs:

[0042] 1, suspension; 2, pump shaft; 3, mechanical seal assembly; 4, pumping ring; 5, delivery pipe; 6, three-way pipe; 7, exhaust valve; 8, exhaust pipe; 9, end cover; 10, oil retaining ring; 1A, bearing;

[0043] 11, infusion cavity; 12, movable cavity; 13, accommodating cavity; 31, movable ring; 32, stationary ring; 33, gland; 41, support part; 42, pump ring part;

[0044] 121, flow guide ring groove; 122, liquid outlet hole; 421, through hole; 422, annular inclined groove; 423, throttling groove. DETAILED DESCRIPTION

[0045] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0046] ​​First of all, it needs to be explained that in the following description for the sake of clearly illustrating the technical scheme of the utility model, some orientation words such as terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are all analogically possessed meanings according to the normal orientation of the parts in the high-temperature pump seal self-circulation cleaning mechanism, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a specific orientation, structure and operation, and therefore cannot be understood as limiting the utility model.

[0047] In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features, and therefore the features limited by "first" and "second" can explicitly or implicitly include one or more of the features.

[0048] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integral connection, can be direct connection, or indirect connection through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0049] In order to better understand the above technical scheme, the above technical scheme will be described in detail in the following in combination with the description of the drawings and the specific embodiments.

[0050] Embodiment:

[0051] As Figures 1 to 4 shown, the utility model embodiment discloses a kind of high-temperature pump seal self-circulation cleaning mechanism, for making high-temperature medium in movable cavity 12 carry out self-circulation, to realize flushing and cleaning in the process of circulating flow, to avoid the formation of deposition and scale, its specific structure includes: suspension 1, pump shaft 2, mechanical seal assembly 3, pumping ring 4 and delivery pipe 5.

[0052] Suspension 1 is main support structure, and inside has sequentially communicated infusion cavity 11, movable cavity 12 and containing cavity 13. Wherein, movable cavity 12 inner perimeter is equipped with flow guide ring groove 121, the groove bottom of flow guide ring groove 121 is equipped with liquid outlet hole 122, movable cavity 12 inner wall is equipped with liquid inlet hole 123, and liquid inlet hole 123 is located at the side of flow guide ring groove 121 close to containing cavity 13.

[0053] Pump shaft 2 penetrates suspension 1, and sequentially passes through infusion cavity 11, movable cavity 12 and containing cavity 13.

[0054] The mechanical seal assembly 3 comprises a dynamic ring 31, a static ring 32 and a gland 33, as shown in the specific arrangement of which is as follows: Figure 2

[0055] The dynamic ring 31 is located in the movable cavity 12 and is sleeved on the pump shaft 2; in operation, it rotates with the pump shaft 2 and forms a sealing pair with the static ring 32 to effectively prevent medium leakage;

[0056] The static ring 32 is sleeved outside the pump shaft 2 and cooperates with the dynamic ring 31; in operation, it remains stationary and is in close contact with the dynamic ring 31 to form a mechanical seal surface, thereby ensuring the sealing effect;

[0057] The gland 33 is sleeved outside the static ring 32 and is installed on the cavity bottom of the accommodating cavity 13; it serves to fix the static ring 32 and enhance the sealing performance.

[0058] The pumping ring 4 is sleeved on the dynamic ring 31 and closes the flow guide ring groove 121; it rotates with the dynamic ring 31 and uses centrifugal force to throw the high-temperature medium in the movable cavity 12 into the flow guide ring groove 121, thereby providing power for the self-circulation of the high-temperature medium.

[0059] The conveying pipe 5 is in communication at one end with the liquid outlet hole 122 and at the other end with the liquid inlet hole 123; it ensures the circulation flow of the high-temperature medium.

[0060] The above technical solution works as follows:

[0061] In operation of the high-temperature pump, the high-temperature medium enters the movable cavity 12 through the liquid inlet cavity 11 and is blocked by the mechanical seal assembly 3, thereby failing to enter the accommodating cavity 13, thus achieving the sealing effect.

[0062] In self-circulation cleaning, the pumping ring 4 rotates with the dynamic ring 31 and uses centrifugal force to throw the high-temperature medium in the movable cavity 12 into the flow guide ring groove 121, then the high-temperature medium enters the conveying pipe 5 outside the suspension 1 through the liquid outlet hole 122, thereafter exchanges heat with the external environment in the process of flowing in the conveying pipe 5, thus also serving to cool and lower the temperature, finally the high-temperature medium flows back to the movable cavity 12 through the liquid inlet hole 123 and reflows toward the pumping ring 4, and in the process, the inner wall of the movable cavity 12, the surface of the dynamic ring 31 and the surface of the static ring 32 and other areas are washed and cleaned, thereby avoiding the formation of deposits and incrustations.

[0063] After a long period of operation, the end of the conveying pipe 5 in communication with the liquid inlet hole 123 can be disconnected and connected to an external collection mechanism, so that the high-temperature medium accumulated in the movable cavity 12 is discharged, and at the same time, new high-temperature medium is supplemented into the movable cavity 12 through the liquid inlet cavity 11, thereby together removing the impurities contained in the accumulated high-temperature medium, reducing the failure rate and improving the long-term operation stability.​

[0064] The utility model discloses a pumping ring 4 can utilize centrifugal force and throw the high temperature medium in movable cavity 12 to diversion ring groove 121, thereby providing power for the self -circulation of high temperature medium, and realizing backflow and heat exchange through the conveying pipe 5 to play the role of circulating cleaning and cooling, can avoid the deposition and incrustation, and can reduce the temperature of mechanical seal assembly 3, prolongs the sealing life.

[0065] In some embodiments, as shown in Figure 1 、 Figure 3 and Figure 4 Also include: three -way pipe 6, exhaust valve 7 and exhaust pipe 8. Wherein, the first pipe mouth of three -way pipe 6 is linked with liquid outlet hole 122, and the second pipe mouth is linked with conveying pipe 5, the inlet of exhaust valve 7 is linked with the third pipe mouth of three -way pipe 6, and one end of exhaust pipe 8 is linked with the outlet of exhaust valve 7.

[0066] When high temperature pump just starts to operate, gas is stored in liquid delivery cavity 11 and movable cavity 12, so that the high temperature medium is not easy to enter due to the action of gas pressure, at this time, exhaust valve 7 can be opened, then gas can be discharged to the designated area through three -way pipe 6, exhaust valve 7 and exhaust pipe 8 in turn, and after exhausting, exhaust valve 7 is closed again, so that the stable operation of self -circulation can be ensured.

[0067] Through the above setting, the stored gas can be discharged conveniently and quickly, so that the stable operation of high temperature pump is ensured, and the operation is simple and convenient, and the self -circulation is not interfered, and the use effect is good.

[0068] In some embodiments, as shown in Figure 2 Pumping ring 4 includes:

[0069] Supporting part 41 is installed on dynamic ring 31;

[0070] Pump ring part 42 is arranged on one side of supporting part 41 and is sleeved on the outside of dynamic ring 31.

[0071] Wherein, the inner circumferential surface of pump ring part 42 and dynamic ring 31 have radial clearance, the outer circumferential surface of pump ring part 42 closes diversion ring groove 121, and a plurality of through holes 421 are spaced apart and arranged and communicated with diversion ring groove 121.

[0072] Exemplarily, supporting part 41 is a circular ring structure, is sleeved on dynamic ring 31, and is connected by means of countersunk head bolt, has the effect of stable connection and convenient disassembly.

[0073] Through the above setting, the high temperature medium can be driven to circulate and flow efficiently and stably, and the structure is simple and compact, convenient to install and arrange.

[0074] On the basis of the above embodiments, as shown in Figure 2 The pump ring part 42 is provided with an annular inclined groove 422 on the side close to the static ring 32. It plays a role of flow guide and improves the pumping efficiency of the pump ring part 42.

[0075] On the basis of the above embodiments, as shown in Figure 2 The outer circumferential surface of the pump ring part 42 is provided with a plurality of throttling grooves 423, which are arranged on both sides of the flow guide ring groove 121.

[0076] It should be noted that when the fluid flows through the throttling groove 423, the flow path of the fluid becomes complex due to the existence of the groove, the flow rate increases, and at the same time the fluid is hindered at the groove, which produces a throttling effect.

[0077] By arranging the throttling groove 423, the sealing effect of the outer circumferential surface of the pump ring part 42 on the flow guide ring groove 121 is improved, thereby ensuring the pumping effect and improving the circulation stability.

[0078] In some embodiments, the liquid outlet hole 122 is arranged at the top of the suspension 1, and the liquid inlet hole 123 is arranged at one side of the suspension 1; this arrangement can facilitate assembly, disassembly, maintenance and repair, reduce the operation difficulty, and improve the operation efficiency.

[0079] In some embodiments, the cross sections of the liquid conveying cavity 11, the movable cavity 12 and the accommodating cavity 13 are circular and coaxially arranged, and the diameters gradually increase.

[0080] The above-mentioned circular cross section arrangement is conducive to reducing the turbulent flow and vortex flow of the fluid in the cavity, thereby reducing the energy loss and improving the fluid conveying efficiency.

[0081] The above-mentioned coaxial arrangement ensures that the flow path of the fluid in the cavity is smoother, reduces the impact and wear of the fluid on the cavity wall, and prolongs the service life of the equipment.

[0082] The above-mentioned gradual increase in diameter not only ensures that the liquid conveying cavity 11 is adapted to the pump shaft 2, thereby limiting the flow efficiency of the high-temperature medium, but also leaves space for the movement and installation of components such as the mechanical seal assembly 3 and the pumping ring 4, thereby ensuring the use effect.

[0083] In some embodiments, as shown in Figure 1 and Figure 3 It further comprises:

[0084] The end cover 9 is mounted at the end of the suspension 1 and is used to firmly fix the bearing 1A, so as to ensure that the bearing 1A will not be displaced or fall off during operation due to vibration or external force;

[0085] Two oil blocking rings 10 are oppositely arranged, mounted in the accommodating cavity 13, sleeved on the pump shaft 2, and abut against the gland 33 and the end cover 9 respectively, for blocking the lubricating oil from flowing out of the bearing 1A in the axial direction and preventing the lubricating oil from entering other parts or leaking out.

[0086] A plurality of bearings 1A are mounted in the accommodating cavity 13, sleeved on the pump shaft 2, and constrained between the two oil blocking rings 10, for supporting the pump shaft 2 to rotate freely on the axis, reducing friction and wear, improving running accuracy, and reducing noise and vibration.

[0087] Through the above arrangement, the suspension 1 and the pump shaft 2 are rotationally connected, the structure is stable, the suspension 1 and the pump shaft 2 are convenient to disassemble and assemble, and the long-term running stability is good.

[0088] In the specification of the utility model, a large number of specific details are explained. However, it can be understood that the embodiments of the utility model can be practiced without these specific details. In some examples, well-known methods, structures and techniques are not shown in detail, so as not to obscure the understanding of the specification.

[0089] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, the skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0090] Finally, it should be pointed out that: the above embodiments are only used to illustrate the technical scheme of the utility model, but not to limit it; although the utility model 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 scheme recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical scheme deviate from the scope of the technical scheme of the embodiments of the utility model, and they should be covered in the scope of the claims and specification of the utility model.

Claims

1. A high temperature pump seal self-circulation cleaning mechanism, characterized in that, The utility model relates to a pump, comprising: a suspension, which has a liquid inlet cavity, a movable cavity and a containing cavity in sequence, a flow guide ring groove is arranged on the inner wall of the movable cavity, a liquid outlet hole is arranged on the bottom of the flow guide ring groove, and a liquid inlet hole is arranged on the inner wall of the movable cavity and located on the side of the flow guide ring groove close to the containing cavity; a pump shaft, which penetrates the suspension and sequentially passes through the liquid inlet cavity, the movable cavity and the containing cavity; a mechanical seal assembly, which comprises a movable ring, which is arranged in the movable cavity and sleeved on the pump shaft, a stationary ring, which is sleeved on the pump shaft and matched with the movable ring, a gland, which is sleeved on the outside of the stationary ring and installed on the bottom of the containing cavity, a pumping ring, which is sleeved on the movable ring and closes the flow guide ring groove, and a conveying pipe, one end of which is connected with the liquid outlet hole and the other end of which is connected with the liquid inlet hole.

2. The high temperature pump seal self-circulation cleaning mechanism of claim 1, wherein, The utility model further comprises: a three-way pipe, a first pipe opening of which is connected with the liquid outlet hole and a second pipe opening of which is connected with the conveying pipe, an exhaust valve, an inlet of which is connected with a third pipe opening of the three-way pipe, and an exhaust pipe, one end of which is connected with the outlet of the exhaust valve.

3. The high temperature pump seal self-circulation cleaning mechanism of claim 1, wherein, The pumping ring comprises: a support part, which is installed on the movable ring, a pump ring part, which is arranged on one side of the support part and sleeved on the outside of the movable ring, wherein, a radial gap is formed between the inner circumferential surface of the pump ring part and the movable ring, the outer circumferential surface of the pump ring part closes the flow guide ring groove and is spaced apart to form a plurality of through holes connected with the flow guide ring groove.

4. The high temperature pump seal self-circulation cleaning mechanism of claim 3, wherein, An annular inclined groove is arranged on the side of the pump ring part close to the stationary ring.

5. The high temperature pump seal self-circulation cleaning mechanism of claim 3, wherein, A plurality of throttling grooves are arranged on the outer circumferential surface of the pump ring part and located on both sides of the flow guide ring groove.

6. The high temperature pump seal self-circulation clean out mechanism of claim 1, wherein, The liquid outlet hole is arranged on the top of the suspension, and the liquid inlet hole is arranged on one side of the suspension.

7. The high temperature pump seal self-circulation cleaning mechanism of claim 1, wherein, The cross sections of the liquid inlet cavity, the movable cavity and the containing cavity are all circular and coaxially arranged, and the diameters gradually increase.

8. The high temperature pump seal self-circulation cleaning mechanism of claim 1, wherein, The utility model further comprises: an end cover, which is installed on the end of the suspension, two oil retaining rings, which are oppositely arranged, installed in the containing cavity and sleeved on the pump shaft, one of which abuts against the gland and the other of which abuts against the end cover, a plurality of bearings, which are installed in the containing cavity and sleeved on the pump shaft and constrained between the two oil retaining rings.

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