Shield main drive sealing and cooling structure

Abstract

The utility model discloses a shield main drive sealing and cooling structure which comprises a sealing ring body. The radial water ring channel is attached to the outer side face of the sealing ring body; the end face water ring channel is attached to the working end face of the sealing ring body; the system water inlet is formed in the radial water ring channel; the radial water outlet is formed in the tail end of the radial water ring channel; the end surface water inlet is formed in the end surface water ring channel and is communicated with the radial water outlet; the system water outlet is formed in the tail end of the end surface water loop; the radial partition plate is arranged between the system water inlet and the radial water outlet; the end face partition plate is arranged between the end face water inlet and the system water outlet. According to the technical scheme, compared with the prior art, the cooling efficiency of the shield main drive sealing system can be improved, application of polyurethane sealing under the scene of complex working conditions can be better met, therefore, the working stability of main drive sealing is improved, and the operation reliability of the whole main drive system is indirectly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine technical field more specifically, especially, it relates to a shield main drive sealing cooling structure. BACKGROUND

[0002] The shield main drive sealing structure refers to a sealing system for the main drive part of the shield machine, which is used to protect the main drive device from the intrusion of external silt, water and other impurities during the tunneling process of the shield machine, and to prevent the leakage of internal lubricating medium. The sealing system is usually composed of multiple rubber single-lip seals and a labyrinth structure, and the sealing effect is enhanced by filling grease between the lip seals.

[0003] However, in actual application, especially on large-diameter shield machines, the traditional sealing ring body often encounters problems such as sealing failure, and in further optimization design, polyurethane finger seals with high elasticity, high wear resistance and high pressure-bearing capacity are often used to replace lip seals. However, one major drawback of polyurethane finger seals is their poor heat resistance, but they generate a lot of heat, and the use temperature is usually not more than 70 degrees Celsius, which becomes a significant technical obstacle in application scenarios that require high linear speed and other complex working conditions. Since polyurethane sealing material is sensitive to temperature, and the cooling efficiency of the traditional sealing structure is low, the working stability of the sealing structure is poor, and it is difficult to meet the application of polyurethane seals in high linear speed and other complex working conditions.

[0004] Therefore, how to provide a shield main drive sealing cooling structure to improve the cooling efficiency of the shield main drive sealing system, better meet the application of polyurethane seals in high linear speed and other complex working conditions, and thus improve the working stability of the main drive sealing, indirectly improve the operation reliability of the entire main drive system, has become a technical problem that needs to be solved by the technical personnel in the field. UTILITY MODEL CONTENTS

[0005] To solve the above technical problems, the utility model provides a shield main drive sealing cooling structure, which can improve the cooling efficiency of the shield main drive sealing system, better meet the application of polyurethane seals in high linear speed and other complex working conditions, and thus improve the working stability of the main drive sealing, indirectly improve the operation reliability of the entire main drive system.

[0006] The technical scheme provided by the utility model is as follows:

[0007] The utility model provides a kind of shield main drive sealing cooling structure, comprising: sealing ring body;With the radial water ring channel for adjusting outside heat, which is attached to the outside surface of the sealing ring body;End surface water ring channel for adjusting operating end surface heat, which is attached to the operating end surface of the sealing ring body;System water inlet is arranged on the radial water ring channel;Radial water outlet is arranged at the end of the radial water ring channel;End surface water inlet is arranged on the end surface water ring channel, and the end surface water inlet is communicated with the radial water outlet;System water outlet is arranged at the end of the end surface water ring channel;Radial baffle is arranged between the system water inlet and the radial water outlet, for blocking the radial water ring channel;End surface baffle is arranged between the end surface water inlet and the system water outlet, for blocking the end surface water ring channel.

[0008] Further, in a preferred mode of the utility model, further comprising: a first wear-resistant ring is arranged outside the sealing ring body, and the radial water ring channel is arranged between the first wear-resistant ring and the outer wall of the sealing ring body.

[0009] Further, in a preferred mode of the utility model, further comprising: a second wear-resistant ring is arranged on the end surface of the sealing ring body, and the end surface water ring channel is arranged between the second wear-resistant ring and the operating end surface wall of the sealing ring body.

[0010] Further, in a preferred mode of the utility model, the first wear-resistant ring is specifically a wear-resistant ring made of high-tension steel or high-strength steel.

[0011] Further, in a preferred mode of the utility model, further comprising: an anti-skid structure is arranged on the outer surface of the first wear-resistant ring and the second wear-resistant ring.

[0012] Further, in a preferred mode of the utility model, further comprising: a temperature detection device is arranged on the sealing ring body.

[0013] Further, in a preferred mode of the utility model, the temperature detection device comprises: a temperature sensor, which is arranged close to the sealing lip of the sealing ring body;A data transmission module, which is used for transmitting temperature data to the control system in real time.

[0014] Further, in a preferred mode of the utility model, further comprising: a guide vane or a guide groove is arranged on the inner surface of the radial water ring channel and the end surface water ring channel.

[0015] Further, in a preferred mode of the utility model, further comprising: an adjusting valve is connected with the temperature detection device, and the adjusting valve adjusts the flow of cooling water according to the temperature data fed back by the temperature detection device.

[0016] Further, in a preferred mode of the utility model, it further comprises a heat exchange circulating water system connected with the system water inlet and the system water outlet, and the heat exchange circulating water system exchanges energy between the outflowing high-temperature water and low-temperature medium.

[0017] As described above, the shield main drive sealing cooling structure provided by the utility model, compared with the prior art, comprises: a sealing ring body; a radial water ring channel attached to the outer side of the sealing ring body and used for adjusting the heat of the outer side; an end surface water ring channel attached to the working end surface of the sealing ring body and used for adjusting the heat of the working end surface; a system water inlet arranged on the radial water ring channel; a radial water outlet arranged at the end of the radial water ring channel; an end surface water inlet arranged on the end surface water ring channel, the end surface water inlet being communicated with the radial water outlet; a system water outlet arranged at the end of the end surface water ring channel; a radial partition plate arranged between the system water inlet and the radial water outlet and used for blocking the radial water ring channel; and an end surface partition plate arranged between the end surface water inlet and the system water outlet and used for blocking the end surface water ring channel. In the conventional design, the cooling water is usually dispersed along different paths after entering the cooling structure, and then gathered again at the convergence point to form a diverging and converging cooling path. The conventional cooling structure often causes the cooling water to mix in advance, resulting in uneven heat transfer, difficult accurate control of local temperature, possible increase of turbulence in the system, and reduced heat exchange efficiency. The cooling water inlet path of the shield main drive sealing cooling structure designed by the utility model is as follows: after the cooling water enters the radial water ring channel from the system water inlet, the radial partition plate blocks the system water inlet and the radial water outlet, so that the cooling water can only flow around the ring in the direction away from the radial partition plate and close to the system water inlet, at which time the cooling water exchanges heat with the outer side of the sealing ring body, and then flows out from the radial water outlet, enters the end surface water ring channel from the end surface water inlet, and due to the blocking of the end surface partition plate between the end surface water inlet and the system water outlet, the cooling water can only flow around the ring in the direction away from the end surface partition plate and close to the end surface water inlet, at which time the cooling water exchanges heat with the end surface of the sealing ring body, and finally flows out from the system water outlet. Specifically, the cooling water first enters the radial water ring channel, preliminarily absorbs heat at this point, and then flows into the end surface water ring channel for further heat dissipation. The shield main drive sealing cooling structure designed by the utility model adopts a sequential communication mode, which not only prolongs the residence time of the cooling water in the cooling structure and the path length of heat transfer, but also ensures that the cooling water can flow along the predetermined path, thereby improving the cooling efficiency. Compared with the prior art, the shield main drive sealing cooling structure of the utility model can improve the cooling efficiency of the shield main drive sealing system, better meet the application of polyurethane sealing in high linear speed and other complex working conditions, thereby improving the working stability of the main drive sealing, and indirectly improving the operation reliability of the entire main drive system. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0019] Figure 1 The shaft view of the shield main drive sealing cooling structure provided by the embodiment of the present application is provided.

[0020] Figure 2 The waterway structure schematic diagram of the shield main drive sealing cooling structure provided by the embodiment of the present application is provided.

[0021] Figure 3 The radial water inlet schematic diagram related to the embodiment of the present application is provided.

[0022] Figure 4 The end face water inlet schematic diagram related to the embodiment of the present application is provided.

[0023] Figure 5 The temperature detection device schematic diagram related to the embodiment of the present application is provided. DETAILED DESCRIPTION

[0024] In order to make the skilled in the art better understand the technical solutions in the present application, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0025] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or indirectly on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0026] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "first", "second", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or an implied indication of the number of technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" or "several" is two or more, unless otherwise explicitly specified.

[0028] It should be understood that the structures, proportions, sizes, etc. shown in the drawings of the present application are only used to cooperate with the content disclosed in the description, so that those skilled in the art can understand and read, and are not used to limit the implementation conditions of the present application. Therefore, any modification of structure, change of proportion relationship or adjustment of size, which does not affect the functions and purposes that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0029] As shown in Figures 1 to 5 In the embodiments of the present application, the shield main drive sealing cooling structure provided by the embodiments of the present application comprises: a sealing ring body 12; a radial water ring channel 1 attached to the outer side of the sealing ring body 12 and used for adjusting the heat of the outer side; an end surface water ring channel 2 attached to the working end surface of the sealing ring body 12 and used for adjusting the heat of the working end surface; a system water inlet 4 arranged on the radial water ring channel 1; a radial water outlet 11 arranged at the end of the radial water ring channel 1; an end surface water inlet 8 arranged on the end surface water ring channel 2, the end surface water inlet 8 being in communication with the radial water outlet 11; a system water outlet 5 arranged at the end of the end surface water ring channel 2; a radial partition plate 6 arranged between the system water inlet 4 and the radial water outlet 11 and used for blocking the radial water ring channel 1; and an end surface partition plate 9 arranged between the end surface water inlet 8 and the system water outlet 5 and used for blocking the end surface water ring channel 2.

[0030] More specifically, the radial partition plate 6 is parallel to the rotation center axis of the sealing ring body 12; and the end surface partition plate 9 is perpendicular to the rotation center axis of the sealing ring body 12.

[0031] The cooling water flows in the radial water ring channel 1 and preliminarily absorbs heat, then enters the end surface water ring channel 2 to continue heat dissipation, which is helpful to uniformly distribute heat and avoid temperature sudden change caused by the cooling water directly entering a high-temperature area.

[0032] In the traditional design, the cooling water path design mode of generally separated and then combined exists problems of uneven heat transfer caused by early mixing of the cooling water, difficulty in accurately controlling local temperature and possible increased turbulence in the system, so that the heat exchange efficiency is reduced, the cooling effect is affected, and then the reliability of the sealing system can be reduced. The utility model adopts the sequential connection mode, the cooling water flows through the radial water ring channel 1 and the end surface water ring channel 2 in turn, so that the flow path of the cooling water is longer, since the cooling water will not be mixed in advance due to the separated path mode when flowing, the cooling water flows through each cooling section in turn, the cooling path is prolonged, so that the heat can be more uniformly removed, thereby improving the overall cooling efficiency and the stability of the system. At the same time, the sealing cooling structure provided by the utility model reduces the turbulence phenomenon through the orderly water flow path, avoids the problem of low heat exchange efficiency caused by turbulent water flow, so as to better control the temperature, reduce heat accumulation, enhances the heat exchange efficiency between the cooling water and the main drive sealing, improves the reliability and service life of the system.

[0033] Wherein, through the preheating of the radial water ring channel 1, the cooling water first flows in the radial water ring channel 1 and preliminarily absorbs heat, then enters the end surface water ring channel 2 to continue heat dissipation, which is helpful to uniformly distribute heat and avoid temperature sudden change caused by the cooling water directly entering a high-temperature area; secondly, the preheated cooling water can more effectively take away heat when entering the end surface water ring channel 2, improving the overall cooling efficiency. In this way, the reliability of the cooling system is improved, the heat exchange efficiency is enhanced, and the stable operation of the main drive sealing system of the shield is ensured.

[0034] The radial partition plate 6 and the end face partition plate 9 guide the cooling water to flow along a predetermined path, so that the cooling water flow path becomes more orderly, avoiding the disorderly flow of cooling water that may exist in the traditional design, helping to improve the cooling efficiency and ensure that the cooling water can be uniformly distributed and fully absorb heat. The cooling water flow state changes from the original turbulent state to a more orderly laminar state, which helps to enhance the heat exchange efficiency between the cooling water and the main drive seal, thereby better controlling the temperature and reducing heat accumulation. In addition, through the guiding action of the radial partition plate 6 and the end face partition plate 9, the flow path of the cooling water becomes controllable, which helps to monitor the flow of the cooling water in real time, enhances the reliability of the entire system and ensures stable operation under high load conditions.

[0035] Specifically, in the embodiment of the utility model, still include: first wear -resisting ring 7 set in the sealing ring body 12 outside, radial water ring channel 1 set between first wear -resisting ring 7 and sealing ring body 12 outer wall.

[0036] Specifically, in the embodiment of the utility model, still include: second wear -resisting ring 10 set in the sealing ring body 12 end face, end face water ring channel 2 set between second wear -resisting ring 10 and sealing ring body 12 operation end face wall.

[0037] Wherein, the second wear -resisting ring is installed on the operation end face of the sealing ring body, with the advance of the shield machine, the main drive system will experience complex motion state, including rotation, propulsion, the second wear -resisting ring can bear the radial and axial load generated thereby, protect the sealing ring body from damage, while being able to reduce the wear and tear of external material to the end face of the sealing ring body.

[0038] Specifically, in the embodiment of the utility model, first wear -resisting ring 7 specifically is: wear -resisting ring made of high tension steel or high strength steel.

[0039] Wherein, the first wear -resisting ring 7 is located on the outer side of the sealing ring body, in the process of shield tunneling, the first wear -resisting ring 7 bears the pressure and friction force from the front soil or rock, protects the shield main drive seal structure from being abraded. The sealing cooling structure provided by the utility model adopts high tension steel or high strength steel material to manufacture the first wear -resisting ring 7, improves the strength of the first wear -resisting ring 7, so that the first wear -resisting ring 7 can effectively disperse the load, reduce the direct wear of the sealing ring body, and ensure the long-term stable operation of the sealing ring body.

[0040] Specifically, in the embodiment of the utility model, still include: anti -skid structure of first wear -resisting ring 7 and second wear -resisting ring 10 outer surface is equipped.

[0041] Wherein, the anti -skid structure is groove or texture.

[0042] Wherein, by setting grooves or textures on the outer surfaces of the first wear-resistant ring 7 and the second wear-resistant ring 10, the friction coefficient is increased, the pressure is dispersed, and the wear caused by pressure fluctuations is reduced, thereby further improving the reliability and service life of the system. In addition, the grooves or textures also help to increase the contact area between the cooling water and the wear-resistant ring, thereby enhancing the heat exchange efficiency, and the temperature of the sealing area can be more effectively controlled to ensure the stable operation of the cooling system.

[0043] Wherein, the cooling water ring flows around the wear-resistant ring, and when the shield machine contacts the soil or other materials during excavation, a large amount of heat is generated. The cooling water continuously circulates through the ring, directly contacts and absorbs the heat on the surface of the wear-resistant ring, and carries away the heat, thereby effectively reducing the temperature of the wear-resistant ring, preventing material fatigue or damage caused by overheating, and prolonging the service life of the wear-resistant ring. In order to work at a more stable temperature, reduce the wear rate, and further improve the reliability and working efficiency of the entire shield machine system.

[0044] Specifically, in the embodiment of the utility model, still include: temperature detection device 3 set on the sealing ring body 12.

[0045] Specifically, in the embodiment of the utility model, the temperature detection device 3 includes: temperature sensor, the temperature sensor is set at the position close to the sealing lip of the sealing ring body 12;Data transmission module, the data transmission module is used for real-time transmission temperature data to control system.

[0046] More specifically, in the embodiment of the utility model, the temperature sensor is specifically a thermocouple.

[0047] Wherein, temperature detection device 3 can real-time sealing area temperature variation, prevent the sealing failure caused by overheating, and transmit data to control system, can timely adjust cooling strategy, ensure that sealing system is always in the optimum working temperature range, thereby improving the reliability and stability of the entire system.

[0048] Specifically, in the embodiment of the utility model, the inner surface of the radial water ring 1 and the end face water ring 2 is provided with a guide vane or a guide groove.

[0049] Wherein, by setting guide vanes or guide grooves, the cooling water is guided to flow along a predetermined path, thereby reducing turbulence, making the cooling water flow more orderly, close to the laminar flow state. Not only improves the water flow speed and heat exchange coefficient, but also makes the heat exchange efficiency between the cooling water and the main drive seal higher, thereby improving the overall efficiency of the cooling system. At the same time, orderly water flow also helps to reduce the pressure loss caused by turbulence, further improving the cooling effect.

[0050] Specifically, in the embodiment of the utility model, still include: with temperature detection device 3 link's regulating valve, regulating valve according to temperature detection device 3 feedback's temperature data adjustment cooling water flow.

[0051] Wherein, with temperature detection device 3 link's regulating valve realizes the intelligent management of cooling water flow. Through temperature detection device 3 real-time monitoring lip temperature, and data transmission is given to control system, and control system can according to real-time temperature data to adjust regulating valve opening, thereby dynamically adjusting cooling water flow, so that cooling system can quickly respond according to the change of actual working condition, ensure that the lip temperature always keeps in an ideal range, and then improve the reliability and stability of the whole system.

[0052] Specifically, in the embodiment of the utility model, still include: with system water inlet 4 and system water outlet 5 link's heat exchange circulating water system, heat exchange circulating water system carries out energy exchange with low-temperature medium with the high-temperature water that flows out.

[0053] Wherein, heat exchange circulating water system is linked with system water inlet and system water outlet, can circulate cooling water and carry out energy exchange with low-temperature medium, effectively removes the heat generated in the operation of equipment, ensures that the temperature of key components is in a safe range, simultaneously provides necessary cooling for sealing components, enhances the sealing effect, thereby guaranteeing the stable operation of shield machine and prolonging the service life.

[0054] More specifically, conventional main drive sealing system is usually composed of multiple rubber single-lip seals combined with labyrinth structure, and oil is injected between the lip seals. Further optimization, shield polyurethane seal is favored due to its high elasticity, high wear resistance and good pressure-bearing capacity, which can effectively improve the slag blocking effect and improve the overall reliability of the main drive sealing system of shield machine, but the heat resistance of the material itself has obvious shortcomings. Generally, the use temperature of polyurethane seal should not exceed 70 DEG C, which seriously limits its application in large diameter, high linear speed and other complex shield conditions.

[0055] Based on the problems of the prior art, the embodiment of the utility model improves the cooling efficiency by increasing and optimizing the cooling structure and changing the heat transfer path. Even under the same flow and water temperature, the cooling effect can be enhanced. At the same time, the temperature detection device is added, which can monitor the temperature change of the sealing lip of the sealing ring in real time, and ensure the efficient operation of the sealing system.

[0056] The utility model discloses a cooling structure is added to promote forced convection heat transfer, change the cooling water path of original shunt confluence for the cooling water path of sequential communication, make cooling water flow change from chaotic turbulence to laminar state along the direction of the given structure, carry out real -time temperature monitoring through the setting thermocouple, further improve the reliability and cooling efficiency of cooling system to guarantee the efficient operation of shield main drive sealing system under complex working condition.

[0057] Summarized above, the utility model relates to technical scheme, compared with prior art, it can improve the cooling efficiency of shield main drive sealing system, better satisfy the application of polyurethane seal in the scene of high linear velocity and other complex working conditions, thereby improve the working stability of main drive sealing, indirectly improve the operation reliability of whole main drive system.

[0058] The above description of disclosed embodiments enables those skilled in the art to carry out or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A shield main drive sealing cooling structure, characterized in that: include: Sealing ring body (12); a radial water annular channel (1) affixed to the outer side surface of the sealing ring body (12); An end surface water ring channel (2) that is in contact with the operating end surface of the sealing ring body (12); A system water inlet (4) provided on the radial water annular channel (1); a radial water outlet (11) provided at the end of the radial water annular channel (1); an end surface water inlet (8) provided on the end surface water annular channel (2), the end surface water inlet (8) being in communication with the radial water outlet (11); A system water outlet (5) provided at the end of the end surface water ring channel (2); A radial partition (6) disposed between the system water inlet (4) and the radial water outlet (11) and used to block the radial water annular channel (1); An end face partition (9) is provided between the end face water inlet (8) and the system water outlet (5) and is used to block the end face water annular channel (2).

2. The shield main drive sealing cooling structure according to claim 1, characterized in that: Also includes: A first wear-resistant ring (7) is arranged outside the sealing ring body (12), and the radial water annular channel (1) is arranged between the first wear-resistant ring (7) and the outer side wall of the sealing ring body (12).

3. The shield main drive sealing cooling structure according to claim 2, characterized in that: The first wear-resistant ring (7) is specifically a wear-resistant ring made of high-tension steel or high-strength steel.

4. The shield main drive sealing cooling structure according to claim 2, characterized in that: Also includes: A second wear-resistant ring (10) is provided on the end face of the sealing ring body (12), and the end face water ring channel (2) is provided between the second wear-resistant ring (10) and the working end face wall of the sealing ring body (12).

5. The shield main drive sealing cooling structure according to claim 4, characterized in that: Also includes: An anti-slip structure is provided on the outer surfaces of the first wear-resistant ring (7) and the second wear-resistant ring (10).

6. The shield main drive sealing cooling structure according to claim 1, characterized in that: Also includes: Guide plates or guide grooves are provided on the inner surfaces of the radial water annular channel (1) and the end surface water annular channel (2).

7. The shield main drive sealing cooling structure according to claim 1, characterized in that: Also includes: A temperature detection device (3) is provided on the sealing ring body (12).

8. The shield main drive sealing cooling structure according to claim 7, characterized in that: The temperature detection device (3) comprises: a temperature sensor, the temperature sensor being arranged close to the sealing lip of the sealing ring body (12); The data transmission module is used to transmit temperature data to the control system in real time.

9. The shield main drive sealing cooling structure according to claim 7, characterized in that: Also includes: A regulating valve connected to the temperature detection device (3), wherein the regulating valve adjusts the cooling water flow rate according to temperature data fed back by the temperature detection device (3).

10. The shield main drive sealing cooling structure according to any one of claims 1 to 9, characterized in that: Also includes: A heat exchange circulating water system connected to the system water inlet (4) and the system water outlet (5) is used to exchange energy between the outflowing high-temperature water and the low-temperature medium.

Images