Bearing mechanical seal structure for a pump

Abstract

The application relates to the technical field of mechanical sealing and discloses a bearing mechanical sealing structure for a pump, which comprises a pump outer shell, a rotating shaft rotatably arranged in the interior of the pump outer shell, a mounting seat fixed in the interior of the pump outer shell, a static sealing seat fixed in the interior of the pump outer shell, a static sealing ring arranged on the static sealing seat, a dynamic sealing structure arranged in the interior of the pump outer shell, the dynamic sealing structure being matched with the static sealing ring to form a mechanical seal, and a mounting support fixed in the interior of the pump outer shell. The dynamic sealing structure is arranged, after the pump body stops working, a series of mechanical operations are performed to separate the dynamic sealing ring from the static sealing ring, the two can be thoroughly flushed and cleaned, water is supplied to specific positions, the flowing action of the water flow can effectively remove impurities attached to the dynamic sealing ring and the static sealing ring, and the abrasion of the sealing rings by the impurities is avoided.

Description

Technical Field

[0001] This invention relates to the field of mechanical seal technology, and in particular to a mechanical seal structure for pump bearings. Background Technology

[0002] A mechanical seal structure for pump bearings is a device that limits the leakage of working fluid along the rotating shaft. It mainly consists of components such as a stationary ring, a rotating ring, an elastic element, a transmission element, and auxiliary sealing rings.

[0003] A search revealed that Chinese patent CN212028352U discloses a corrosion-resistant mechanical seal, which includes a housing, a ceramic flange, a bushing, and a mechanical seal device. The ceramic flange is fixed to the bottom of the housing, and a clamping device is installed on the top of the bushing. The bushing includes an enamel bushing and a stainless steel bushing, with the ceramic bushing embedded inside the stainless steel bushing. The mechanical seal device includes a medium-side moving ring, an atmospheric-side moving ring, a medium-side stationary ring, and an atmospheric-side stationary ring. The medium-side stationary ring is fixed to the ceramic flange, and the atmospheric-side stationary ring is fixed to the bearing housing. The medium-side moving ring and the atmospheric-side moving ring are located between the medium-side stationary ring and the atmospheric-side stationary ring. A spring seat is provided between the medium-side moving ring and the atmospheric-side moving ring, and a limiting screw is installed on the spring seat. The limiting screw passes through the stainless steel bushing and is inserted into an annular groove on the outer wall of the ceramic bushing. The spring passes through the spring seat and abuts against the atmospheric-side moving ring and the medium-side moving ring. The device provided by the above solution has good sealing effect and strong corrosion resistance. However, the above solution still has the following shortcomings in actual use:

[0004] The mechanical seal proposed in the above solution lacks a cleaning function. With the use of the mechanical seal, impurities in the liquid easily adhere to the sealing surface. First, the adhesion of impurities to the sealing surface will lead to accelerated wear. The sealing surface of a mechanical seal usually requires extremely high flatness and smoothness to ensure its sealing performance. However, when impurities such as particles and fibers adhere to the sealing surface, they will form abrasives between the sealing surfaces, accelerating the wear of the sealing surface. This wear will not only reduce the service life of the sealing surface but also damage its sealing effect, leading to increased leakage. Second, the adhesion of impurities may also cause vibration and noise in the mechanical seal. When impurities accumulate to a certain extent between the sealing surfaces, they will change the gap and contact state of the sealing surfaces, causing the mechanical seal to generate vibration and noise during operation. This vibration and noise will not only affect the normal operation of the equipment but may also damage other components of the equipment.

[0005] Therefore, it is necessary to design a mechanical seal structure for pump bearings to solve the above problems. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a mechanical seal structure for pump bearings.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A mechanical seal structure for a pump bearing, comprising:

[0009] Pump housing;

[0010] The drive shaft is rotatably mounted inside the pump housing.

[0011] The mounting base is fixed inside the pump housing.

[0012] A static sealing seat is fixed inside the pump housing.

[0013] A static sealing ring is provided on the static sealing seat;

[0014] A dynamic sealing structure is disposed inside the pump housing, and the dynamic sealing structure cooperates with the static sealing ring to form a mechanical seal;

[0015] The mounting bracket is fixed inside the pump housing.

[0016] An electromagnet is mounted on the mounting bracket;

[0017] A ball seat is rotatably mounted in the mounting base, and a flow channel is provided on the ball seat;

[0018] A valve stem passes through the pump housing and the mounting base, both of which are rotatably connected to the valve stem. One end of the valve stem is fixedly connected to a ball seat.

[0019] As a preferred embodiment of the present invention, the dynamic sealing structure includes:

[0020] The dynamic sealing seat is slidably disposed on the inner surface of the pump housing;

[0021] An mounting ring is installed on the dynamic sealing seat, and the mounting ring is made of magnetic material.

[0022] A dynamic sealing ring is fixed on the mounting ring and positioned directly opposite the static sealing seat;

[0023] Several first springs, one end of which is connected to the dynamic sealing seat, and the other end of which is connected to the mounting ring.

[0024] In a preferred embodiment of the present invention, the dynamic sealing ring has a hollow structure, and an inflation structure is provided on the dynamic shaft, the inflation structure comprising:

[0025] The first sealing cylinder is fixed on the moving shaft, and the first sealing cylinder is connected to the moving sealing ring through a flexible hose;

[0026] The first sliding plug is slidably connected to the inner surface of the first sealing cylinder;

[0027] The second spring has one end connected to the first sealing cylinder and the other end connected to the first sliding plug;

[0028] The first observation window is located on the first sealing cylinder;

[0029] The second observation window is located on the pump housing and is positioned directly opposite the first observation window.

[0030] As a preferred embodiment of the present invention, the first slide is provided with a colored strip.

[0031] As a preferred embodiment of the present invention, a lubrication structure is provided inside the pump housing, the lubrication structure comprising:

[0032] The second sealing cylinder is fixed to the side of the mounting base;

[0033] The second sliding plug is slidably connected to the inner surface of the second sealing cylinder, and lubricating oil accumulates between the second sliding plug and the second sealing cylinder;

[0034] A pull rod, one end of which is fixedly connected to the second sliding plug, and the other end of which passes through the second sealing cylinder, wherein the pull rod and the second sealing cylinder are slidably connected;

[0035] The second spring has one end connected to the second sealing cylinder and the other end connected to the second sliding plug;

[0036] An annular tube is fixed inside the pump housing, and the annular tube is positioned directly opposite the dynamic sealing ring. The annular tube is connected to the second sealing cylinder via a connecting tube.

[0037] Several nozzles are formed on the annular pipe.

[0038] As a preferred embodiment of the present invention, each of the spray holes is oriented toward the dynamic sealing ring, and a plurality of the spray holes are evenly distributed on the annular tube.

[0039] In a preferred embodiment of the present invention, the annular tube and the dynamic sealing ring do not contact each other.

[0040] In a preferred embodiment of the present invention, the mounting ring is connected to the dynamic sealing seat via a connecting structure, the connecting structure comprising:

[0041] An annular groove is formed on the inner surface of the dynamic seal seat;

[0042] The first slot is formed on the inner surface of the dynamic seal seat and communicates with the annular groove. An opening is formed between the top of the first slot and the end face of the dynamic seal seat.

[0043] The second slot is formed on the inner surface of the dynamic sealing seat and is connected to the annular groove;

[0044] The locking block is fixed to the outer circumferential surface of the mounting ring.

[0045] As a preferred embodiment of the present invention, the side of the card block and the groove wall of the second card slot are in contact with each other.

[0046] As a preferred embodiment of the present invention, the outer surface of the mounting ring and the inner surface of the dynamic sealing seat are in contact with each other.

[0047] The present invention has the following beneficial effects:

[0048] 1. By setting up a dynamic sealing structure, after the pump stops working, a series of mechanical operations separate the dynamic sealing ring and the static sealing ring, making it easy to thoroughly flush and clean both of them. Secondly, by passing water through specific parts, the flow of water can effectively remove impurities attached to the dynamic and static sealing rings, thereby avoiding wear on the sealing rings caused by these impurities and extending their service life. Finally, after cleaning, the pump can be restored to normal working condition by reversing the operation. The entire cleaning process is simple and efficient, without the need to disassemble the mechanical seal structure, which greatly reduces maintenance costs and workload.

[0049] 2. First, the hollow structure of the dynamic sealing ring and its cooperation with the inflation structure ensure that the dynamic sealing ring always presses against the static sealing seat under air pressure, thereby guaranteeing the mechanical sealing effect between the dynamic and static sealing rings and improving the reliability and stability of the seal. Second, when the dynamic sealing ring is corroded or damaged, the gas leakage can be detected in time. Specifically, gas leakage will cause the second spring to push the first sliding plug to move. By observing the position of the first sliding plug, the staff can quickly determine whether the dynamic sealing ring is damaged. This design greatly improves the efficiency and accuracy of fault detection. In addition, the setting of the first observation window on the first sealing cylinder and the second observation window on the pump body, as well as the application of the colored strip on the first sliding plug and the principle of visual persistence, enable the staff to more intuitively and accurately determine the position of the first sliding plug, thereby timely detecting the damage to the dynamic sealing ring.

[0050] 3. This connection structure enables quick installation and removal of the mounting ring, greatly simplifying the replacement process of the dynamic seal ring. Workers can quickly install the dynamic seal ring by simply aligning, snapping, and rotating it, without the need for complex tools or tedious steps, significantly improving work efficiency. Secondly, the design of this connection structure considers convenience and stability during installation. The cooperation between the locking block and the first, annular, and second locking slots not only ensures that the mounting ring can be accurately and firmly installed on the dynamic seal seat, but also allows the locking block to automatically snap into the second locking slot through the elastic force of the first spring. Finally, this connection structure also ensures tight contact and good sealing between the dynamic and static seal rings. During installation, as the locking block moves and rotates, the dynamic seal ring gradually approaches and presses against the static seal ring, thus ensuring the mechanical sealing effect between the two.

[0051] 4. After cleaning the dynamic and static seals, pushing the pull rod evenly pushes the lubricating oil in the second sealing cylinder into the annular tube, and sprays it onto the surfaces of the dynamic and static seals through the nozzle. This process not only ensures precise application of the lubricating oil, but also provides necessary lubrication for the contact surfaces of the dynamic and static seals. When the electromagnet is de-energized, the mounting ring and the dynamic seal will reset under the elastic force of the first spring, and the dynamic seal will press the static seal again. At this time, the lubricating oil adhering to the contact surfaces of the two can quickly form a sealing oil film. The existence of this oil film brings two major benefits: first, it significantly reduces the frictional loss between the dynamic and static seals, extending the service life of the seals; second, it improves the sealing performance of the contact surfaces of the two, enhancing the overall sealing effect of the pump mechanical seal structure. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the planar structure of a mechanical seal structure for a pump bearing proposed in this invention;

[0053] Figure 2 This is an exploded structural diagram of a mechanical seal structure for a pump bearing proposed in this invention;

[0054] Figure 3 This is an exploded structural diagram of a pump bearing mechanical seal structure proposed in this invention from another perspective.

[0055] Figure 4 for Figure 2 Enlarged view of the structure at point A;

[0056] Figure 5 for Figure 3 Enlarged view of the structure at point B;

[0057] Figure 6 This is a schematic diagram of the lubrication structure;

[0058] Figure 7 This is a schematic diagram of the inflatable structure;

[0059] Figure 8 This is a schematic diagram of the connection structure.

[0060] In the diagram: 1. Pump housing, 2. Moving shaft, 3. Mounting base, 4. Static sealing base, 5. Static sealing ring, 61. Moving sealing base, 62. Mounting ring, 63. Moving sealing ring, 64. First spring, 7. Mounting bracket, 8. Electromagnet, 91. First sealing cylinder, 92. First sliding plug, 93. Second spring, 94. First observation window, 95. Second observation window, 101. Annular groove, 102. First slot, 103. Second slot, 104. Locking block, 111. Second sealing cylinder, 112. Second sliding plug, 113. Pull rod, 114. Second spring, 115. Annular tube, 116. Spray hole, 12. Ball seat, 13. Valve stem. Detailed Implementation

[0061] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0062] Reference Figure 1-8 A mechanical seal structure for a pump bearing includes a pump housing 1; a moving shaft 2 rotatably mounted inside the pump housing 1; a mounting base 3 fixed inside the pump housing 1; a static sealing seat 4 fixed inside the pump housing 1; a static sealing ring 5 disposed on the static sealing seat 4; a mounting bracket 7 fixed inside the pump housing 1; an electromagnet 8 mounted on the mounting bracket 7; a ball seat 12 rotatably mounted inside the mounting base 3, the ball seat 12 having a flow channel; and a valve stem 13 passing through the pump housing 1 and the mounting base 3, both the pump housing 1 and the mounting base 3 being rotatably connected to the valve stem 13, one end of the valve stem 13 being fixedly connected to the ball seat 12.

[0063] The mechanical seal structure also includes a dynamic seal structure, which is disposed inside the pump housing 1. The dynamic seal structure cooperates with the static seal ring 5 to form a mechanical seal. The dynamic seal structure includes: a dynamic seal seat 61, which is slidably disposed on the inner surface of the pump housing 1; a mounting ring 62, which is mounted on the dynamic seal seat 61. The mounting ring 62 is made of magnetic material, and the outer surface of the mounting ring 62 is in contact with the inner surface of the dynamic seal seat 61; a dynamic seal ring 63, which is fixed on the mounting ring 62 and is positioned opposite the static seal seat 4; and several first springs 64, one end of which is connected to the dynamic seal seat 61, and the other end of which is connected to the mounting ring 62. When cleaning, the operator first controls the pump to stop working, and then rotates the valve stem 13. When the 3rd part rotates, it can drive the ball seat 12 to rotate until the ball seat 12 rotates 90°, so that the flow channel on the ball seat 12 is perpendicular to the moving shaft 2. At this time, the liquid cannot flow through the ball seat 12. Then, the operator energizes the electromagnet 8. When the electromagnet 8 is energized, it can generate magnetism and attract the mounting ring 62 made of magnetic material, so that the mounting ring 62 moves towards the direction of the electromagnet 8. When the mounting ring 62 moves, it can drive the moving seal ring 63 to move, so that the moving seal ring 63 and the stationary seal ring 5 are separated from each other. Then, the operator flows water into the pump housing 1. When the water flows into the pump housing 1, the flow of water can cause impurities to fall off the moving seal ring 63 and the stationary seal ring 5, which can wash and clean the moving seal ring 63 and the stationary seal ring 5.

[0064] The dynamic sealing ring 63 has a hollow structure. An inflation structure is provided on the moving shaft 2. The inflation structure includes: a first sealing cylinder 91 fixed to the moving shaft 2, connected to the dynamic sealing ring 63 via a flexible hose; a first sliding plug 92 slidably connected to the inner surface of the first sealing cylinder 91, with a colored strip on it; a second spring 93, one end connected to the first sealing cylinder 91 and the other end connected to the first sliding plug 92; a first observation window 94 on the first sealing cylinder 91; and a second observation window 95 on the pump housing 1, directly opposite the first observation window 94. Under the elastic force of the second spring 93, the first sliding plug 92 always tends to push gas into the dynamic sealing ring 63, keeping the dynamic sealing ring 63 in a constantly inflated state. Under the pressure of the air, the dynamic sealing ring 63 can press against the static sealing seat 5, thus ensuring the mechanical connection between the dynamic sealing ring 63 and the static sealing ring 5. In addition to the sealing effect, when the dynamic sealing ring 63 is corroded and damaged, gas will leak from the leak point. When gas leaks from the inside of the dynamic sealing ring 63, the second spring 93 can push the first sliding plug 92 to move. Therefore, the operator can judge whether the dynamic sealing ring 63 is damaged by observing the position of the first sliding plug 92. The first sealing cylinder 91 is provided with a first observation window 94, and the pump housing 1 is provided with a second observation window 95, which is set directly opposite the first observation window 94. The operator can judge the position of the first sliding plug 92 by observing the first observation window 94 and the second observation window 95. Furthermore, the first sliding plug 92 is provided with a colored strip. During the rotation of the moving shaft 2, the first sliding plug 92 will rotate with it. According to the principle of visual persistence, the colored strip on the first sliding plug 92 can form a colored ring. The presence of the colored ring helps the operator to accurately judge the position of the first sliding plug 92, so that the operator can detect the damage to the dynamic sealing ring 63.

[0065] The pump housing 1 has an internal lubrication structure, which includes: a second sealing cylinder 111 fixed to the side of the mounting base 3; a second sliding plug 112 slidably connected to the inner surface of the second sealing cylinder 111, with lubricating oil accumulating between the second sliding plug 112 and the second sealing cylinder 111; a pull rod 113, one end of which is fixedly connected to the second sliding plug 112, and the other end of which passes through the second sealing cylinder 111, with the pull rod 113 slidably connected to the second sealing cylinder 111; and a second spring. 114, one end connected to the second sealing cylinder 111, the other end connected to the second sliding plug 112; annular tube 115, fixed inside the pump housing 1, the annular tube 115 is positioned directly opposite the dynamic sealing ring 63, the annular tube 115 and the second sealing cylinder 111 are connected by a connecting pipe, the annular tube 115 and the dynamic sealing ring 63 do not contact each other; a plurality of spray holes 116 are all formed on the annular tube 115, each spray hole 116 is positioned facing the dynamic sealing ring 63. Several nozzles 116 are evenly distributed on the annular tube 115. After cleaning the dynamic sealing ring 63 and the static sealing ring 5, the operator keeps the dynamic sealing ring 63 and the static sealing ring 5 separated and pushes the pull rod 113, causing the pull rod 113 to move the second sliding plug 112. When the second sliding plug 112 moves, it can push the lubricating oil in the second sealing cylinder 111 into the interior of the annular tube 115, so that the lubricating oil flows out through several nozzles 116. This allows the lubricating oil to flow onto the dynamic sealing ring 63 and the static sealing ring 5, tightening the seal. Next, the staff controls the electromagnet 8 to be de-energized. When the electromagnet 8 is de-energized, the mounting ring 62 and the dynamic sealing ring 63 will be reset under the elastic force of several first springs 64 until the dynamic sealing ring 63 presses the static sealing ring 5. In this case, the lubricating oil adhering to the dynamic sealing ring 63 and the static sealing ring 5 can form a sealing oil film. The presence of this oil film can reduce the frictional loss between the dynamic sealing ring 63 and the static sealing ring 5, and also improve the sealing performance of the contact surface between the dynamic sealing ring 63 and the static sealing ring 5.

[0066] The mounting ring 62 is connected to the dynamic sealing seat 61 via a connecting structure, which includes: an annular groove 101 formed on the inner surface of the dynamic sealing seat 61; a first retaining groove 102 formed on the inner surface of the dynamic sealing seat 61 and communicating with the annular groove 101, wherein the top end of the first retaining groove 102 forms an opening between it and the end face of the dynamic sealing seat 61; a second retaining groove 103 formed on the inner surface of the dynamic sealing seat 61 and communicating with the annular groove 101; and a retaining block 104 fixed on the outer circumferential surface of the mounting ring 62, wherein the side of the retaining block 104 is in contact with the groove wall of the second retaining groove 103.

[0067] The specific working principle of this invention is as follows:

[0068] The mechanical seal structure for pumps proposed in this invention has the function of cleaning the static seal ring 5 and the dynamic seal ring 63. During cleaning, the operator first stops the pump body, then rotates the valve stem 13. The rotation of the valve stem 13 drives the ball seat 12 to rotate until it rotates 90°, making the flow channel on the ball seat 12 perpendicular to the moving shaft 2. At this point, liquid cannot flow through the ball seat 12. Next, the operator energizes the electromagnet 8. When energized, the electromagnet 8 generates magnetism and attracts the mounting ring 62 made of magnetic material, causing the mounting ring 62 to move towards the electromagnet 8. This movement of the mounting ring 62 drives the dynamic seal ring 63 to move, separating it from the static seal ring 5. Then, the operator introduces water into the pump housing 1. When the water flows into the pump housing 1, the flow of water can remove impurities. The impurities fall off the dynamic seal ring 63 and the static seal ring 5, which serves to flush and clean the dynamic seal ring 63 and the static seal ring 5. Then, while maintaining the water supply, the operator rotates the valve stem 13 in the opposite direction, causing the ball seat 12 to rotate 90° in the opposite direction until the flow channel on the ball seat 12 is rotated to the position facing the moving shaft 2. At this time, the water inside the pump housing 1 can pass through the flow channel on the ball seat 12 and flow out from the inside of the pump housing 1. The impurities mixed in the water will also flow out from the inside of the pump housing 1 with the water flow, thus cleaning the dynamic seal ring 63 and the static seal ring 5 and preventing impurities from causing wear to the dynamic seal ring 63 and the static seal ring 5, ensuring the mechanical sealing effect of the dynamic seal ring 63 and the static seal ring 5. It is worth noting that the electromagnet 8 is waterproofed, which can prevent the liquid inside the pump housing 1 from affecting the normal operation of the electromagnet 8.

[0069] Furthermore, the dynamic seal ring 63 has a hollow structure, and the moving shaft 2 is equipped with an inflation structure that works in conjunction with the dynamic seal ring 63. Specifically, under the elastic force of the second spring 93, the first sliding plug 92 always tends to push gas into the interior of the dynamic seal ring 63, which keeps the dynamic seal ring 63 in an inflated state. Under the action of air pressure, the dynamic seal ring 63 can press the static seal seat 5, thereby ensuring the mechanical sealing effect between the dynamic seal ring 63 and the static seal ring 5. In addition, when the dynamic seal ring 63 is corroded and damaged, gas will leak from the leak point. When gas leaks from the interior of the dynamic seal ring 63, the second spring 93 can push the first sliding plug 92 to move. Therefore, the operator can observe the first... The position of the sliding plug 92 is used to determine whether the dynamic seal ring 63 is damaged. The first sealing cylinder 91 has a first observation window 94, and the pump housing 1 has a second observation window 95, which is directly opposite the first observation window 94. The operator can determine the position of the first sliding plug 92 through the first observation window 94 and the second observation window 95. In addition, the first sliding plug 92 is provided with a colored strip. When the moving shaft 2 rotates, the first sliding plug 92 will rotate with it. According to the principle of visual persistence, the colored strip on the first sliding plug 92 can form a colored ring. The presence of the colored ring helps the operator to accurately determine the position of the first sliding plug 92, so that the operator can discover the damage to the dynamic seal ring 63 in time.

[0070] The dynamic sealing ring 63 is mounted on the mounting ring 62, which is connected to the dynamic sealing seat 61 via a connecting structure. This connecting structure allows for quick assembly and disassembly of the mounting ring 62, facilitating replacement of the dynamic sealing ring 63. Specifically, when installing the dynamic sealing ring 63, the operator first aligns the locking block 104 on the mounting ring 62 with the first locking groove 102 and then inserts the mounting ring 62 into the dynamic sealing seat 61. During this process, the locking block 104 slides within the first locking groove 102. Furthermore, the mounting ring 62 can also engage several... When a spring 64 compresses the locking block 104, and it moves to the position where the first locking groove 102 connects with the annular groove 101, the locking block 104 and the mounting ring 62 can no longer move. At this time, the operator can rotate the mounting ring 62, causing the mounting ring 62 to drive the locking block 104 to rotate. When the locking block 104 rotates, it can slide within the annular groove 101. When the locking block 104 moves to the position facing the second locking groove 103, it will move upward under the elastic force of several first springs 64 and lock into the second locking groove 103. During this process... The locking block 104 will slide within the second locking groove 103, and the dynamic sealing ring 63 will approach the static sealing ring 5 until the dynamic sealing ring 63 presses against the static sealing ring 5, thus achieving quick installation of the dynamic sealing ring 63. When the dynamic sealing ring 63 is installed in place, under the elastic force of several first springs 64, the dynamic sealing ring 63 can tightly press against the static sealing ring 5 to achieve a mechanical seal. When it is necessary to disassemble the dynamic sealing ring 63, the operator first presses the mounting ring 62 to retract the mounting ring 62 into the interior of the dynamic sealing seat 61. During this process, the locking block 104 will slide within the second locking groove 103, and the dynamic sealing ring 63 will approach the static sealing ring 5 until the dynamic sealing ring 63 presses against the static sealing ring 5, thus achieving a mechanical seal. Sliding within the second slot 103, when the locking block 104 moves to the position where the second slot 103 connects with the annular groove 101, the locking block 104 and the mounting ring 62 can no longer move. At this time, the operator rotates the mounting ring 62 in the opposite direction, causing the locking block 104 to move within the annular groove 101. When the locking block 104 moves to the position directly opposite the first slot 102, the locking block 104 can slide into the first slot 102. At this time, the mounting ring 62 will pop out from the dynamic sealing seat 61 under the elastic force of several first springs 64, realizing the quick disassembly of the dynamic sealing ring 63.

[0071] The pump housing 1 is also equipped with a lubrication structure for lubricating the dynamic seal ring 63 and the static seal ring 5. After cleaning the dynamic seal ring 63 and the static seal ring 5, the operator keeps the dynamic seal ring 63 and the static seal ring 5 in a separated state and pushes the pull rod 113, causing the pull rod 113 to move the second sliding plug 112. When the second sliding plug 112 moves, it can push the lubricating oil in the second sealing cylinder 111 into the interior of the annular tube 115, so that the lubricating oil flows out through several spray holes 116. This allows the lubricating oil to flow to the dynamic seal ring 63 and the static seal ring 5. Immediately after sealing ring 5, the operator controls the electromagnet 8 to de-energize. When the electromagnet 8 is de-energized, the mounting ring 62 and the dynamic sealing ring 63 will reset under the elastic force of several first springs 64 until the dynamic sealing ring 63 presses against the static sealing ring 5. In this case, the lubricating oil adhering to the dynamic sealing ring 63 and the static sealing ring 5 can form a sealing oil film. The presence of this oil film can reduce the frictional loss between the dynamic sealing ring 63 and the static sealing ring 5, and also improve the sealing performance of the contact surface between the dynamic sealing ring 63 and the static sealing ring 5.

[0072] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A mechanical seal structure for a pump bearing, characterized in that, include: Pump housing (1); The moving shaft (2) is rotatably installed inside the pump housing (1); Mounting base (3) is fixed inside the pump housing (1); The static sealing seat (4) is fixed inside the pump housing (1); A static sealing ring (5) is provided on the static sealing seat (4); A dynamic sealing structure is provided inside the pump housing (1). The dynamic sealing structure cooperates with the static sealing ring (5) to form a mechanical seal. The dynamic sealing structure includes: a dynamic sealing seat (61), which is slidably disposed on the inner surface of the pump housing (1). Mounting ring (62) is mounted on the dynamic sealing seat (61), and the mounting ring (62) is made of magnetic material; dynamic sealing ring (63) is fixed on the mounting ring (62) and is positioned opposite the static sealing seat (4); a plurality of first springs (64) are connected at one end to the dynamic sealing seat (61) and at the other end to the mounting ring (62); Mounting bracket (7) is fixed inside the pump housing (1); An electromagnet (8) is mounted on the mounting bracket (7); A ball seat (12) is rotatably installed in the mounting base (3), and a flow channel is provided on the ball seat (12); The valve stem (13) passes through the pump housing (1) and the mounting base (3). The pump housing (1) and the mounting base (3) are rotatably connected to the valve stem (13). One end of the valve stem (13) is fixedly connected to the ball seat (12).

2. The mechanical seal structure for a pump bearing according to claim 1, characterized in that, The dynamic sealing ring (63) has a hollow structure, and the dynamic shaft (2) is provided with an inflation structure, the inflation structure including: The first sealing cylinder (91) is fixed on the moving shaft (2), and the first sealing cylinder (91) is connected to the moving sealing ring (63) through a hose; The first sliding plug (92) is slidably connected to the inner surface of the first sealing cylinder (91); The second spring (93) is connected at one end to the first sealing cylinder (91) and at the other end to the first sliding plug (92); The first observation window (94) is located on the first sealing cylinder (91); The second observation window (95) is opened on the pump housing (1) and is positioned opposite the first observation window (94).

3. The mechanical seal structure for a pump bearing according to claim 2, characterized in that, The first slide (92) is provided with a colored strip.

4. The mechanical seal structure for a pump bearing according to claim 1, characterized in that, The pump housing (1) has a lubrication structure inside, the lubrication structure including: The second sealing cylinder (111) is fixed to the side of the mounting base (3); The second sliding plug (112) is slidably connected to the inner surface of the second sealing cylinder (111), and lubricating oil is accumulated between the second sliding plug (112) and the second sealing cylinder (111). A pull rod (113) has one end fixedly connected to the second sliding plug (112) and the other end passing through the second sealing cylinder (111). The pull rod (113) and the second sealing cylinder (111) are slidably connected. The second spring (114) is connected at one end to the second sealing cylinder (111) and at the other end to the second sliding plug (112); An annular tube (115) is fixed inside the pump housing (1). The annular tube (115) is positioned opposite the dynamic sealing ring (63). The annular tube (115) and the second sealing cylinder (111) are connected by a connecting tube. Several nozzles (116) are formed on the annular pipe (115).

5. The mechanical seal structure for a pump bearing according to claim 4, characterized in that, Each of the nozzles (116) is positioned toward the dynamic sealing ring (63), and a plurality of the nozzles (116) are evenly distributed on the annular tube (115).

6. The mechanical seal structure for a pump bearing according to claim 4, characterized in that, The annular tube (115) and the dynamic sealing ring (63) do not contact each other.

7. The mechanical seal structure for a pump bearing according to claim 1, characterized in that, The mounting ring (62) is connected to the dynamic sealing seat (61) via a connecting structure, the connecting structure comprising: An annular groove (101) is formed on the inner surface of the dynamic sealing seat (61); The first slot (102) is formed on the inner surface of the dynamic sealing seat (61) and communicates with the annular groove (101). An opening is formed between the top of the first slot (102) and the end face of the dynamic sealing seat (61). The second slot (103) is formed on the inner surface of the dynamic sealing seat (61) and is connected to the annular groove (101); The locking block (104) is fixed on the outer circumferential surface of the mounting ring (62).

8. The mechanical seal structure for a pump bearing according to claim 7, characterized in that, The side of the card block (104) is in contact with the groove wall of the second card slot (103).

9. The mechanical seal structure for a pump bearing according to claim 1, characterized in that, The outer surface of the mounting ring (62) and the inner surface of the dynamic sealing seat (61) are in contact with each other.

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