Mechanical sealing device for water-cooled wall circulating pump

Abstract

The invention relates to a mechanical sealing device for a water-cooled wall circulating pump, and belongs to the technical field of mechanical sealing.The mechanical sealing device for the water-cooled wall circulating pump comprises a shaft sleeve, a gland, a non-compensation ring, a compensation ring assembly, an elastic element and a conical cleaning ring, the shaft sleeve is used for being arranged on a rotating shaft in a sleeving mode, and the gland is used for being connected with a pump body; the gland is provided with a flushing fluid inlet and a flushing fluid outlet, the non-compensation ring is arranged on the gland, the compensation ring assembly is arranged on the shaft sleeve in a sliding and sleeving mode in the axial direction of the rotating shaft, the compensation ring assembly is used for being connected with the non-compensation ring in an abutting mode to form a friction pair, and a sealed installation cavity is formed between the compensation ring assembly and the shaft sleeve. The elastic element is located in the installation cavity, and the conical cleaning ring is arranged on the compensation ring assembly and used for restraining impurity particles from being accumulated at the end of the compensation ring assembly. The method has the advantages that long-period stable operation of the mechanical seal is guaranteed, and meanwhile the operation cost of the device is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical seals, in particular to a mechanical seal device for a water-cooled wall circulating pump. Background Art

[0002] Mechanical seals are shaft sealing devices used in rotating equipment such as pumps. They generally adopt a multi-spring sliding structure, which includes non-compensating rings, compensating rings, elastic elements, auxiliary sealing rings and other components. The elastic element provides axial thrust to the compensating ring to ensure that the compensating ring and the non-compensating ring are in close contact to form a friction pair.

[0003] A water-wall pump typically provides circulation power for a water-wall system. In mechanical seals within water-wall circulation pumps, flushing fluid is typically introduced from an external source to cool and lubricate the seal end faces. Currently, to prevent impurities in the flushing fluid from accumulating on the elastic element and causing seal failure, a clean, treated flushing fluid is introduced from an external source. However, this significantly increases operating costs. Summary of the Invention

[0004] In order to ensure the long-term stable operation of the mechanical seal while reducing the operating cost of the device, the present invention provides a mechanical seal device for a water-cooled wall circulating pump.

[0005] The present invention provides a mechanical seal device for a water-cooled wall circulating pump that adopts the following technical solution: A mechanical sealing device for a water-cooled wall circulating pump, comprising: A shaft sleeve, the shaft sleeve is used to be sleeved on the rotating shaft; A gland, the gland is used to connect to the pump body, and the gland is provided with a flushing liquid inlet and a flushing liquid outlet; A non-compensating ring, the non-compensating ring being arranged on the gland, A compensating ring assembly, wherein the compensating ring assembly is slidably sleeved on the shaft sleeve along the axial direction of the rotating shaft, and the compensating ring assembly is used to abut against the non-compensating ring to form a friction pair; an elastic element, the elastic element being used to ensure that the compensating ring assembly always has a tendency to move toward the non-compensating ring, a sealed mounting cavity being formed between the compensating ring assembly and the shaft sleeve, and the elastic element being located in the mounting cavity; A conical cleaning ring is provided on the compensating ring assembly and is used to suppress accumulation of foreign particles at the end of the compensating ring assembly.

[0006] Preferably, the compensation ring assembly includes a compensation ring seat and a compensation ring body, the compensation ring seat is arranged on the shaft sleeve along the axial sliding sleeve of the rotating shaft, the mounting cavity is formed between the compensation ring seat and the shaft sleeve, the elastic element is arranged between the compensation ring seat and the shaft sleeve, the conical cleaning ring is arranged on the compensation ring seat, the compensation ring body is installed on the compensation ring seat, and the compensation ring body is tightly abutted against the non-compensation ring to form a mechanical seal.

[0007] Preferably, the inner wall of the conical cleaning ring has an inner conical surface, and the diameter of the inner conical surface increases gradually in a direction away from the non-compensating ring.

[0008] Preferably, the conical cleaning ring is provided with a plurality of power grooves along its circumference, and the power grooves penetrate the conical cleaning ring along the radial direction of the rotating shaft.

[0009] Preferably, the shaft sleeve includes a first sleeve body and a second sleeve body, the outer diameter of the first sleeve body is smaller than the outer diameter of the second sleeve body, the compensation ring seat includes a connecting section and a sealing section arranged on both sides of the connecting section, the connecting section is slidably sleeved on the first sleeve body, the sealing section on one side of the connecting section is slidably sleeved on the second sleeve body, and the sealing section on the other side is sleeved on the compensation ring body, and an installation cavity is enclosed between the first sleeve body, the second sleeve body, the connecting section and the sealing section away from the side of the compensation ring body, and the conical cleaning ring is arranged on the sealing section away from the side of the compensation ring body.

[0010] Preferably, a compensation ring seat sealing ring is installed on the inner wall of the sealing section away from the compensation ring body.

[0011] Preferably, an installation groove is provided on the inner wall of the sealing section away from the side of the compensation ring body, the compensation ring seat sealing ring is located in the installation groove, and an impurity removal gap is provided between the inner wall of the sealing section of the compensation ring seat sealing ring away from the side of the compensation ring body and the outer wall of the second sleeve, and the impurity removal gap is connected to the installation groove.

[0012] Preferably, the mechanical sealing device also includes a pumping ring, which is arranged on the shaft sleeve. The pumping ring is located on the side of the conical cleaning ring away from the non-compensating ring. The pumping ring is provided with multiple pumping grooves along its own circumference, and the inner wall of the pressure cover is provided with a collecting groove along the circumference. The pumping groove is connected to the collecting groove, and the flushing liquid outlet is connected to the collecting groove.

[0013] Preferably, the pumping ring includes a first ring body and a second ring body, the first ring body is sleeved on the shaft sleeve, a plurality of throttling grooves are opened on the outer wall of the first ring body along its own circumference, the outer wall of the first ring body abuts against the pressure cover, the second ring body is arranged on the side of the first ring body close to the conical cleaning ring, and there is a fluid replenishment gap between the inner wall of the second ring body and the outer wall of the shaft sleeve, a plurality of the pumping grooves are opened on the second ring body, the pumping grooves are connected with the fluid replenishment gap, and the plurality of the pumping grooves divide the second ring body into a plurality of blocks, curved surfaces are formed on opposite sides of the blocks, and the distance between the curved surfaces on opposite sides of the blocks decreases toward the direction away from the axis of the rotating shaft.

[0014] Preferably, a block is provided in the collection tank, and the block is located on one side of the flushing liquid outlet. The block has a guide slope on the side close to the flushing liquid outlet, and the guide slope is aligned with the flushing liquid outlet. The distance from the guide slope to the axis of the rotating shaft increases toward the direction close to the block.

[0015] In summary, the present invention has the following beneficial technical effects: The external flushing liquid cools and lubricates the mechanical seal formed by the non-compensating ring and the compensating ring assembly through the flushing liquid inlet, and is then discharged from the flushing liquid outlet. Since the installation cavity is in a sealed state, the elastic element does not come into contact with the flushing liquid, and can adapt to working conditions containing certain particulate impurities, and at the same time does not affect the long-term stable use of the elastic element; during the rotation of the rotating shaft, the sleeve drives the compensating ring assembly and the conical cleaning ring to rotate synchronously. The conical cleaning ring can suppress the accumulation of impurity particles at the end of the compensating ring assembly, further preventing impurity particles in the flushing liquid from affecting the normal use of the compensating ring assembly, thereby eliminating the need to introduce external treated clean flushing liquid, which helps reduce the operating cost of the device while ensuring the long-term stable operation of the mechanical seal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a plan view of the overall structure of an embodiment of the present invention.

[0017] Figure 2 It is a partial structural plan view of an embodiment of the present invention.

[0018] Figure 3 It is a plan view of the overall structure of the shaft sleeve in an embodiment of the present invention.

[0019] Figure 4 It is a cross-sectional view of the overall structure of the compensation ring seat in an embodiment of the present invention.

[0020] Figure 5 3 is a local structural plan view of the conical cleaning ring in an embodiment of the present invention, wherein the arrow represents the direction of the flow field generated by the fluid.

[0021] Figure 6It is a plan view of the overall structure of the pumping ring in an embodiment of the present invention.

[0022] Figure 7 Schematic diagram of the overall structure of the pumping ring in an embodiment of the present invention.

[0023] Figure 8 It is a sectional plan view of the overall structure of the gland in an embodiment of the present invention.

[0024] Explanation of reference numerals: 1, sleeve; 101, first sleeve body; 102, second sleeve body; 2, rotating shaft; 3, gland; 4, non-compensating ring; 5, elastic element; 6, mounting cavity; 7, conical cleaning ring; 71, inner cone; 8, compensating ring seat; 81, connecting section; 82, sealing section; 9, compensating ring body; 10, power groove; 11, compensating ring seat sealing ring; 12, mounting groove; 13, debris removal gap; 14, pumping ring; 1 41. First ring body; 142. Second ring body; 1421. Block body; 15. Pumping trough; 16. Collecting trough; 17. Throttle trough; 18. Fluid filling gap; 19. Stop block; 20. Diversion slope; 21. Flushing liquid inlet; 22. Flushing liquid outlet; 23. Pump cover; 24. Sealing chamber; 25. Positioning plate; 26. Positioning groove; 27. Compensating ring seal; 28. Non-compensating ring seal; 29. ​​Cylindrical pin; 30. Trough body. DETAILED DESCRIPTION

[0025] The following combination Figures 1-8 The present invention is described in further detail.

[0026] The embodiment of the present invention discloses a mechanical seal device for a water-cooled wall circulating pump. Figure 1 and Figure 2 The mechanical sealing device for a water-cooled wall circulating pump includes a shaft sleeve 1, a gland 3, a non-compensating ring 4, a compensating ring assembly, an elastic element 5 and a conical cleaning ring 7, wherein the shaft sleeve 1 is fixedly mounted on the rotating shaft 2 through a shaft holder so as to rotate synchronously with the rotating shaft 2; the gland 3 is fixedly connected to the pump body by bolts, specifically, the gland 3 is fixedly mounted on the pump cover 23 by the cooperation of studs and nuts, so that when the rotating shaft 2 rotates, the gland 3 is in a stationary state; the gland 3 is made of austenitic stainless steel, which has excellent corrosion resistance and good mechanical properties; a flushing liquid inlet 21 and a flushing liquid outlet 22 are provided on the gland 3, and the external flushing liquid enters from the flushing liquid inlet 21 and is discharged through the flushing liquid outlet 22 and the pump cover 23.

[0027] Reference Figure 1 and Figure 2The non-compensating ring 4 is fixed to the gland 3 by screws. The non-compensating ring 4 is made of silicon carbide and can withstand particle wear. The shaft sleeve 1 is rotatably inserted into the non-compensating ring 4. To improve the sealing between the non-compensating ring 4 and the gland 3, a non-compensating ring seal 28 is installed between the non-compensating ring 4 and the gland 3. The compensating ring assembly is slidably mounted on the shaft sleeve 1 along the axial direction of the rotating shaft 2. The compensating ring assembly is used to tightly abut the non-compensating ring 4 to form a friction pair. A sealed cavity 24 is formed between the gland 3, the compensating ring assembly, the non-compensating ring 4, and the shaft sleeve 1. The flushing liquid inlet 21 is aligned with the sealing end surface of the compensating ring assembly and the non-compensating ring 4. The flushing liquid entering through the flushing liquid inlet 21 flows through the sealed cavity 24 and out of the flushing liquid outlet 22.

[0028] Reference Figure 1 and Figure 2 The elastic element 5 is arranged between the shaft sleeve 1 and the compensation ring assembly, and is used to make the compensation ring assembly always have a tendency to move toward the direction close to the non-compensation ring 4. A sealed installation cavity 6 is formed between the compensation ring assembly and the shaft sleeve 1, and the elastic element 5 is located in the installation cavity 6; a conical cleaning ring 7 is arranged on the compensation ring assembly, and the conical cleaning ring 7 is used to suppress the accumulation of foreign particles at the end of the compensation ring assembly.

[0029] During use, the external flushing liquid enters the sealing chamber 24 through the flushing liquid inlet 21, and then the flushing liquid cools and lubricates the mechanical seal formed by the non-compensating ring 4 and the compensating ring assembly, and then is discharged from the flushing liquid outlet 22. Since the installation chamber 6 is in a sealed state, the elastic element 5 does not contact the flushing liquid during the operation of the sealing device, and can adapt to working conditions containing certain particulate impurities, and does not affect the long-term stable use of the elastic element 5; during the rotation of the rotating shaft 2, the sleeve 1 drives the compensating ring assembly and the conical cleaning ring 7 to rotate synchronously. The conical cleaning ring 7 can suppress the accumulation of mechanical impurities at the end of the compensating ring assembly, and prevent the impurity particles in the flushing liquid from entering the installation chamber 6 and affecting the normal use of the compensating ring assembly. Therefore, there is no need to introduce clean flushing liquid after external treatment to maintain long-term stable operation of the mechanical seal, which helps to reduce the operating cost of the device and can operate stably for a long period of time under high temperature and high pressure water conditions. In the embodiment of the present invention, it can adapt to working conditions with a maximum design temperature of 280°C and a maximum pressure of 9MPa.

[0030] Reference Figure 1 and Figure 3 , wherein the sleeve 1 includes a first sleeve body 101 and a second sleeve body 102, the second sleeve body 102 is fixedly installed on the rotating shaft 2 through a shaft clamp, the first sleeve body 101 and the second sleeve body 102 are integrally formed, the first sleeve body 101 and the second sleeve body 102 are arranged in sequence from the atmosphere side to the medium side, the outer diameter of the first sleeve body 101 is smaller than the outer diameter of the second sleeve body 102, which helps to facilitate the installation of the compensation ring assembly.

[0031] Reference Figure 1 and Figure 3 Furthermore, the compensation ring assembly is slidably mounted on the first sleeve 101 and the second sleeve 102, the first sleeve 101 is rotatably inserted into the non-compensation ring 4, and the end of the pressure cover 3 close to the atmosphere side is fixed with a positioning plate 25 by bolts. The first sleeve 101 is provided with a positioning groove 26 that rotatably cooperates with the positioning plate 25, which helps to prevent the sleeve 1 from moving in the axial direction of the rotating shaft 2.

[0032] Reference Figure 1 、 Figure 2 and Figure 3 Specifically, the compensation ring assembly includes a compensation ring seat 8 and a compensation ring body 9. The compensation ring seat 8 is made of austenitic stainless steel. The compensation ring seat 8 is axially slidably sleeved on the first sleeve 101 and the second sleeve 102 along the rotating shaft 2. The mounting cavity 6 is formed between the compensation ring seat 8, the first sleeve 101 and the second sleeve 102. The elastic element 5 is arranged between the compensation ring seat 8 and the second sleeve 102. The conical cleaning ring 7 is arranged at the end of the compensation ring seat 8 away from the non-compensating ring 4; the compensation ring body 9 is fixedly installed on the compensation ring seat 8 by bolts, and the side of the compensation ring body 9 away from the compensation ring seat 8 is in close contact with the non-compensating ring 4 to form a friction pair. Specifically, the compensation ring body 9 is made of silicon carbide ceramics with good hardness and wear resistance, which can withstand the wear of particles, and the compensation ring body 9 is filled with graphite powder to increase its self-lubricating properties.

[0033] Reference Figure 2 To facilitate the formation of the installation cavity 6, the compensation ring seat 8 includes a connecting section 81 and a sealing section 82. The connecting section 81 is slidably mounted on the first sleeve 101, and the sealing sections 82 are integrally formed on both sides of the connecting section 81. The sealing section 82 on one side of the connecting section 81 is slidably mounted on the second sleeve 102, and the sealing section 82 on the other side is mounted on the compensation ring body 9. The installation cavity 6 is surrounded by the first sleeve 101, the second sleeve 102, the connecting section 81 and the sealing section 82 on the side away from the compensation ring body 9; the compensation ring body 9 is fixedly connected to the connecting section 81 by bolts, and a compensation ring seal 27 is installed between the sealing section 82 on the side close to the compensation ring body 9 and the compensation ring body 9; the conical cleaning ring 7 is arranged on the sealing section 82 on the side away from the compensation ring body 9.

[0034] Reference Figure 2 In order to facilitate the guidance of the sliding of the compensation ring seat 8, a plurality of cylindrical pins 29 are fixed to the end face of the second sleeve 102 close to the first sleeve 101. The length direction of the cylindrical pins 29 is parallel to the axial direction of the rotating shaft 2, and the connecting section 81 of the compensation ring seat 8 is slidably sleeved on the plurality of cylindrical pins 29.

[0035] Reference Figure 1 、 Figure 2 and Figure 3In order to facilitate the compensation ring assembly to always have a tendency to move toward the non-compensating ring 4, the end surface of the second sleeve 102 close to the first sleeve 101 is provided with multiple grooves 30 along its own circumference. The elastic element 5 includes a spring, and the spring corresponds to the groove 30 one by one. One end of the spring is fixed to the bottom wall of the groove 30, and the other end is fixed to the connecting section 81 of the compensation ring seat 8. The spring is always in a compressed state, so that the compensation ring body 9 is tightly fitted with the non-compensating ring 4 under the joint action of the spring and the thrust of the medium.

[0036] Reference Figure 2 and Figure 4 In order to improve the sealing effect of the installation cavity 6, an annular installation groove 12 is opened on the inner wall of the sealing section 82 on the side away from the compensation ring body 9. A compensation ring seat sealing ring 11 is installed in the installation groove 12. The compensation ring seat sealing ring 11 abuts against the outer wall of the second sleeve body 102, thereby ensuring that the elastic element 5 is isolated from the flushing liquid.

[0037] Reference Figure 2 and Figure 4 In order to prevent the accumulation of impurities at the end of the compensation ring seat 8, the inner wall of the conical cleaning ring 7 has an inner conical surface 71, the diameter of which increases gradually as it moves away from the compensation ring body 9. It adopts an internal flow and rotary structure. The internal flow structure refers to a mechanical seal in which the leakage direction of the flushing liquid between the sealing end faces is opposite to the direction of the centrifugal force; the rotary structure refers to a mechanical seal in which the compensation ring body 9 rotates with the shaft. When the seal is working, the conical cleaning ring 7 rotates with the rotation of the rotating shaft 2, and the fluid at the inner conical surface 71 will produce a centrifugal force under the action of the centrifugal force. Figure 5 In the flow field shown by the middle arrow, the fluid flows along the inclined direction of the inner conical surface 71 toward the direction away from the end of the compensation ring seat 8, which helps to suppress the accumulation of impurity particles at the end of the compensation ring seat 8, realizes the self-cleaning effect, and makes it difficult for impurity particles in the flushing liquid to affect the long-term use of the compensation ring body 9 and the elastic element 5. It can be applied to flushing liquid containing a certain amount of particulate impurities, thereby helping to reduce the operating costs of the device.

[0038] Reference Figure 2 and Figure 4 A plurality of power grooves 10 are circumferentially provided on one side of the conical cleaning ring 7 away from the compensation ring body 9. The power grooves 10 penetrate the conical cleaning ring 7 radially along the rotating shaft 2. During the rotation of the conical cleaning ring 7, the opening of the plurality of power grooves 10 helps to accelerate the flow velocity of the flow field, thereby effectively inhibiting the accumulation of particulate impurities at the end of the compensation ring seat 8 and extending the service life of the seal.

[0039] Reference Figure 2 and Figure 5A debris removal gap 13 is defined between the inner wall of the sealing section 82 of the compensating ring seat seal 11, located on the side away from the compensating ring body 9, and the outer wall of the second shaft sleeve 1. This debris removal gap 13 communicates with the mounting groove 12. When foreign particles enter the mounting groove 12, the design of the debris removal gap 13 facilitates their removal by the flow field, reducing the impact of these particles on the compensating ring seat seal 11. This effectively ensures the sealing effect of the mounting cavity 6 and prevents foreign particles in the flushing fluid from affecting the elastic element 5.

[0040] Reference Figure 2 and Figure 6 In order to facilitate the rapid discharge of the flushing liquid and improve the cooling and lubrication effect, the mechanical sealing device also includes a pumping ring 14, which is fixed on the second sleeve 102 by screws. Specifically, the pumping ring 14 is located on the side of the conical cleaning ring 7 away from the compensation ring body 9. The pumping ring 14 is provided with a plurality of pumping grooves 15 along its circumference. The inner wall of the pressure cover 3 is provided with a collecting groove 16 along the circumference. The pumping grooves 15 are connected to the collecting groove 16, and the flushing liquid outlet 22 is connected to the collecting groove 16.

[0041] Reference Figure 2 and Figure 6 Specifically, the pumping ring 14 includes a first ring body 141 and a second ring body 142. The first ring body 141 is fixedly mounted on the second sleeve 102 by bolts. A plurality of throttling grooves 17 are opened on the outer wall of the first ring body 141 along its own circumference. The outer wall of the first ring body 141 abuts against the pressure cover 3; the design of the throttling groove 17 helps to isolate the medium in the pump chamber from the flushing liquid, thereby reducing the exchange between the high-temperature fluid in the pump chamber and the sealing flushing liquid.

[0042] Reference Figure 2 、 Figure 6 and Figure 7 The second ring body 142 is integrally formed on the first ring body 141, and the second ring body 142 is located on the side of the first ring body 141 close to the compensation ring body 9. The inner diameter of the second ring body 142 is larger than the inner diameter of the first ring body 141. There is a fluid replenishment gap 18 between the inner wall of the second ring body 142 and the outer wall of the second sleeve body 102. Multiple pumping grooves 15 are opened on the second ring body 142, and the multiple pumping grooves 15 pass through the second ring body 142 radially along the rotating shaft 2, thereby dividing the second ring body 142 into multiple blocks 1421. The pumping grooves 15 are connected with the fluid replenishment gap 18. Specifically, the fluid replenishment gap 18 is located on the inner side of the pumping groove 15, and the collecting groove 16 is located on the outer side of the pumping groove 15; the block 1421 forms curved surfaces on opposite sides of the first ring body 141 in the circumferential direction, and the distance between the curved surfaces on opposite sides of the block 1421 decreases toward the direction away from the axis of the rotating shaft 2.

[0043] During the operation of the mechanical seal, the flushing liquid enters the pumping ring 14 from the fluid replenishment gap 18, and then under the high-speed rotation of the pumping ring 14, the flushing liquid is subjected to centrifugal force and passes through the cutting and guidance of the curved surfaces of multiple blocks 1421 to flow along the collecting groove 16 on the outside of the pumping ring 14 to the flushing liquid outlet 22, thereby achieving higher pumping efficiency and larger pumping flow; then the flushing liquid is sent to the external cooler through the flushing liquid outlet 22 for cooling and then returns to the flushing liquid inlet 21, maintaining a relatively low temperature environment at the mechanical seal.

[0044] Reference Figure 6 and Figure 8 A stopper 19 is fixed in the collecting tank 16. The stopper 19 is located on one side of the flushing liquid outlet 22. Specifically, when the pumping ring 14 rotates, it rotates from the flushing liquid outlet 22 to the direction of the stopper 19. Figure 6 The arrows in the second housing 102 indicate the rotation direction of the pumping ring 14 , and the arrows between the blocks 1421 indicate the flow direction of the flushing fluid from the fluid replenishing gap 18 to the collecting tank 16 .

[0045] Reference Figure 6 and Figure 8 The block 19 has a guide slope 20 on one side close to the flushing liquid outlet 22 . The guide slope 20 is aligned with the flushing liquid outlet 22 . The distance from the guide slope 20 to the axis of the rotating shaft 2 increases toward the center of the block 19 .

[0046] During the high-speed rotation of the pumping ring 14, the guide slope 20 on the block 19 can effectively guide the flushing liquid to the flushing liquid outlet 22, reduce the loss along the way, obtain a larger flushing flow under the same pressure head conditions, and effectively reduce the temperature of the sealing chamber 24. The pressure head refers to the pressure drop caused by friction, resistance, local obstacles or height changes during the flow of the fluid.

[0047] The implementation principle of the embodiment of the present invention is as follows: when in use, the rotating shaft 2, the sleeve 1, the compensation ring seat 8, the compensation ring body 9, the conical cleaning ring 7 and the pumping ring 14 rotate synchronously, and the external flushing liquid enters the sealing chamber 24 through the flushing liquid inlet 21. Then the flushing liquid cools and lubricates the mechanical seal formed by the non-compensating ring 4 and the compensation ring body 9. During the high-speed rotation of the conical cleaning ring 7, the fluid at the inner conical surface 71 generates a flow field away from the end of the compensation ring seat 8 along the inclined direction of the inner conical surface 71 in the rotating state, which can inhibit the accumulation of impurity particles in the flushing liquid at the end of the compensation ring seat 8, thereby reducing the damage to the compensation ring seat 8 and the compensation ring body. The seat sealing ring 11 and the elastic element 5 are affected; then the flushing liquid enters the pumping ring 14 from the fluid replenishment gap 18. Under the high-speed rotation of the pumping ring 14, the flushing liquid flows to the flushing liquid outlet 22 along the collecting groove 16 on the outside of the pumping ring 14 under the cutting and guidance of the curved surfaces of multiple blocks 1421 through centrifugal action, and the guide slope 20 on the block 19 can effectively guide the flushing liquid to flow to the flushing liquid outlet 22, reducing the loss along the way. Then the flushing liquid is sent to the external cooler through the flushing liquid outlet 22 and the pump cover 23 for cooling and then returns to the flushing liquid inlet 21, which helps to maintain a relatively low temperature environment at the mechanical seal.

[0048] In the present invention, since the elastic element 5 is never in contact with the flushing liquid, the conical cleaning ring 7 has a self-cleaning effect, and can adapt to high-temperature and high-pressure water conditions containing certain particulate impurities. There is no need to introduce externally treated clean flushing liquid. When the impurity particles in the flushing liquid do not affect the long-term stable use of the mechanical sealing device, it helps to reduce the operating cost of the device.

[0049] The above are all preferred embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical seal device for a water-cooled wall circulating pump, characterized in that: include: A shaft sleeve (1), the shaft sleeve (1) being used for being sleeved on a rotating shaft (2); A gland (3), the gland (3) being used to be connected to the pump body, and the gland (3) being provided with a flushing liquid inlet (21) and a flushing liquid outlet (22); a non-compensation ring (4), wherein the non-compensation ring (4) is arranged on the gland (3); A compensating ring assembly, wherein the compensating ring assembly is slidably sleeved on the shaft sleeve (1) along the axial direction of the rotating shaft (2), and the compensating ring assembly is used to abut against the non-compensating ring (4) to form a friction pair; an elastic element (5), the elastic element (5) being used to make the compensating ring assembly always have a tendency to move toward the non-compensating ring (4), a sealed mounting cavity (6) being formed between the compensating ring assembly and the shaft sleeve (1), and the elastic element (5) being located in the mounting cavity (6); A conical cleaning ring (7) is provided on the compensation ring assembly and is used to suppress accumulation of foreign particles at the end of the compensation ring assembly.

2. The mechanical seal device for a water-wall circulating pump according to claim 1, characterized in that: The compensating ring assembly comprises a compensating ring seat (8) and a compensating ring body (9); the compensating ring seat (8) is arranged on the shaft sleeve (1) along the axial sliding sleeve of the rotating shaft (2); the mounting cavity (6) is formed between the compensating ring seat (8) and the shaft sleeve (1); the elastic element (5) is arranged between the compensating ring seat (8) and the shaft sleeve (1); the conical cleaning ring (7) is arranged on the compensating ring seat (8); the compensating ring body (9) is installed on the compensating ring seat (8); the compensating ring body (9) is in close contact with the non-compensating ring (4) to form a friction pair.

3. The mechanical seal device for a water-wall circulating pump according to claim 2, characterized in that: The inner wall of the conical cleaning ring (7) has an inner conical surface (71), and the diameter of the inner conical surface (71) increases gradually in a direction away from the non-compensation ring (4).

4. The mechanical seal device for a water-wall circulating pump according to claim 3, characterized in that: The conical cleaning ring (7) is provided with a plurality of power grooves (10) along its circumference, and the power grooves (10) penetrate the conical cleaning ring (7) along the radial direction of the rotating shaft (2).

5. The mechanical seal device for a water-wall circulating pump according to claim 3, characterized in that: The shaft sleeve (1) comprises a first sleeve body (101) and a second sleeve body (102), the outer diameter of the first sleeve body (101) is smaller than the outer diameter of the second sleeve body (102), the compensation ring seat (8) comprises a connecting section (81) and sealing sections (82) arranged on both sides of the connecting section (81), the connecting section (81) is slidably mounted on the first sleeve body (101), the sealing section (82) on one side of the connecting section (81) is slidably mounted on the second sleeve body (102), and the sealing section (82) on the other side is mounted on the compensation ring body (9), and an installation cavity (6) is formed between the first sleeve body (101), the second sleeve body (102), the connecting section (81) and the sealing section (82) on the side away from the compensation ring body (9), and the conical cleaning ring (7) is arranged on the sealing section (82) on the side away from the compensation ring body (9).

6. The mechanical seal device for a water-wall circulating pump according to claim 5, characterized in that: A compensation ring seat sealing ring (11) is installed on the inner wall of the sealing section (82) on the side away from the compensation ring body (9).

7. The mechanical seal device for a water-wall circulating pump according to claim 6, characterized in that: An installation groove (12) is provided on the inner wall of the sealing section (82) on the side away from the compensation ring body (9), and the compensation ring seat sealing ring (11) is located in the installation groove (12). An impurity removal gap (13) is provided between the inner wall of the sealing section (82) on the side away from the compensation ring body (9) of the compensation ring seat sealing ring (11) and the outer wall of the second shaft sleeve (1), and the impurity removal gap (13) is communicated with the installation groove (12).

8. The mechanical seal device for a water-wall circulating pump according to claim 1, characterized in that: The mechanical sealing device further comprises a pumping ring (14), wherein the pumping ring (14) is sleeved on the shaft sleeve (1), and the pumping ring (14) is located on a side of the conical cleaning ring (7) away from the non-compensating ring (4), and a plurality of pumping grooves (15) are provided on the pumping ring (14) along its own circumference, and a collecting groove (16) is provided on the inner wall of the pressure cover (3) along the circumference, and the pumping grooves (15) are communicated with the collecting groove (16), and the flushing liquid outlet (22) is communicated with the collecting groove (16).

9. The mechanical seal device for a water-wall circulating pump according to claim 8, characterized in that: The pumping ring (14) comprises a first ring body (141) and a second ring body (142). The first ring body (141) is sleeved on the shaft sleeve (1). A plurality of throttling grooves (17) are provided on the outer wall of the first ring body (141) along its own circumference. The outer wall of the first ring body (141) abuts against the pressure cover (3). The second ring body (142) is arranged on a side of the first ring body (141) close to the conical cleaning ring (7). The inner wall of the second ring body (142) abuts against the shaft sleeve (1). A fluid replenishing gap (18) is provided between the outer walls of the sleeve (1), and a plurality of the pumping grooves (15) are provided on the second ring body (142). The pumping grooves (15) are connected to the fluid replenishing gap (18). The plurality of the pumping grooves (15) divide the second ring body (142) into a plurality of blocks (1421). Curved surfaces are formed on opposite sides of the blocks (1421), and the distance between the curved surfaces on opposite sides of the blocks (1421) decreases in a direction away from the axis of the rotating shaft (2).

10. The mechanical seal device for a water-wall circulating pump according to claim 8, characterized in that: A stopper (19) is provided in the collecting tank (16), and the stopper (19) is located on one side of the flushing liquid outlet (22). A guide slope (20) is provided on the side of the stopper (19) close to the flushing liquid outlet (22), and the guide slope (20) is aligned with the flushing liquid outlet (22). The distance from the guide slope (20) to the axis of the rotating shaft (2) increases gradually in a direction close to the stopper (19).

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