Sealing assembly with double sealing rings

Abstract

The utility model relates to the technical field of sealing, in particular to a double-sealing-ring sealing assembly, which comprises a gland, a static sealing mechanism, a shaft sleeve, a dynamic sealing mechanism, a mounting ring, two mounting pipes, two pistons and two connecting rods, the gland, the static sealing mechanism, the shaft sleeve and the dynamic sealing mechanism are matched with each other to realize sealing between a rotating shaft and a machine body and prevent fluid leakage. The mounting ring is used for mounting the two mounting pipes, the valves are arranged on the mounting pipes, external sources can enter the mounting pipes through the valves by adjusting the adjusting valves and act on the pistons, then the connecting rod does linear motion, the connecting rod is connected with the dynamic sealing mechanism, the dynamic sealing mechanism can be in a natural stretching state, and the sealing effect is good. The problem that the performance of an internal spring is weakened due to the fact that the dynamic sealing mechanism is in the same state for a long time is avoided, and the problems that the spring cannot be adjusted, the elasticity of the spring is possibly weakened when the spring is in the same state for a long time, and then the sealing performance is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sealing technical field especially relates to a double sealing ring sealing assembly. BACKGROUND

[0002] The double sealing ring sealing assembly is a kind of high-efficiency sealing structure, is widely used in various industrial equipment, to ensure the stable operation of equipment and prevent fluid leakage, the sealing assembly of existing in use, due to the high-speed rotation of shaft, it is easy to cause internal leakage and external leakage.

[0003] The prior art CN202789677U discloses a kind of double sealing mechanical sealing assembly, including shaft, pump shell, dynamic ring seat, dynamic sealing ring, hard alloy ring, static ring sealing piece, static sealing ring, sealing cover, O-ring and spring, the both ends of sealing assembly are using dynamic ring seal, the material of sealing assembly is wear-resistant hard alloy.Due to the dynamic ring seal system being used in both ends, the internal pressure caused by the high-speed movement of shaft cannot lead to internal leakage and external leakage.

[0004] But in the above structure, spring cannot be adjusted, the elasticity of spring can be weakened in same state for a long time, and then affect sealing performance. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of double sealing ring sealing assembly, solve the problem that spring cannot be adjusted, the elasticity of spring can be weakened in same state for a long time, and then affect sealing performance.

[0006] To achieve the above object, the utility model provides a kind of double sealing ring sealing assembly, including gland, static sealing mechanism, shaft sleeve, dynamic sealing mechanism, mounting ring, two installation tubes, two pistons and two connecting rods, the inside of the gland is provided with two limit prongs, the end of the gland is provided with connecting hole, the static sealing mechanism is set in the gland, the shaft sleeve is inserted in the gland, and the shaft sleeve is provided with limit slot, the dynamic sealing mechanism is set on the outer side wall of the shaft sleeve, the mounting ring is provided with four fastening studs, the mounting ring is sleeved with the outer side wall of the shaft sleeve, and is connected with the shaft sleeve by the fastening stud, two installation tubes are oppositely set on the end face of the mounting ring close to the one end of dynamic sealing mechanism, two pistons are movably set in the inside of two installation tubes respectively, one end of two connecting rods is fixedly connected with two pistons respectively, and the other end of two connecting rods is connected with dynamic sealing mechanism respectively.

[0007] Among them, the static sealing mechanism includes static ring and static ring sealing ring, the static ring is inserted with the gland, and the static ring is provided with two limit holes matched with the limit prongs, and the static ring sealing ring is sleeved with the outer side wall of the static ring.

[0008] The dynamic sealing mechanism comprises a dynamic ring, a dynamic ring sealing ring and a spring seat, the spring seat sleeve is arranged on the outer side wall of the shaft sleeve, the spring seat is provided with a mounting groove matched with the dynamic ring, the dynamic ring is inserted into the mounting groove, the dynamic ring sealing ring sleeve is arranged on the inner side wall of the dynamic ring, and the two connecting rods are fixedly connected with the spring seat.

[0009] The double-seal ring sealing assembly further comprises four fixing mechanisms, and the four fixing mechanisms are arranged above the four connecting holes.

[0010] The fixing mechanism comprises a limiting piece and a connecting bolt, the limiting piece is movably arranged above the connecting hole and is matched with the limiting groove, the connecting bolt, the sliding groove and the connecting hole are matched with each other, and the connecting bolt passes through the sliding groove and is screw-connected with the connecting hole.

[0011] The double-seal ring sealing assembly of the utility model, the limiting pin on the gland is used for fixing the static sealing mechanism, the shaft sleeve is used for protecting the rotating shaft, the gland, the static sealing mechanism, the shaft sleeve and the dynamic sealing mechanism are matched with each other, the sealing between the rotating shaft and the machine body is realized, fluid leakage is prevented, the mounting ring is used for mounting two mounting pipes, the mounting pipe is provided with a valve, when not used, the outside origin can enter the mounting pipe through the air inlet and act on the piston, and then drives the connecting rod to make linear motion, since the connecting rod is connected with the dynamic sealing mechanism, the dynamic sealing mechanism can be in a natural stretching state, the dynamic sealing mechanism is prevented from being in the same state for a long time, the internal spring performance is prevented from being weakened, the problem that the spring cannot be adjusted and the spring is in the same state for a long time and the elastic force of the spring can be weakened and the sealing performance is affected is solved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced.

[0013] Figure 1 It is the overall structure schematic view of the first embodiment of the utility model.

[0014] Figure 2 It is the structure schematic view of the gland and the limiting pin of the first embodiment of the utility model.

[0015] Figure 3 It is the structure schematic view of the static sealing mechanism and the limiting hole of the first embodiment of the utility model.

[0016] Figure 4 is the structural schematic view of the dynamic sealing mechanism and the installation slot of the first embodiment of the utility model.

[0017] Figure 5 is the internal structure schematic view of the installation pipe of the first embodiment of the utility model.

[0018] Figure 6 is the structural schematic view of the whole of the second embodiment of the utility model.

[0019] 101-cover, 102-bush, 103-mounting ring, 104-mounting pipe, 105-piston, 106-connecting rod, 107-static ring, 108-static ring sealing ring, 109-moving ring, 110-moving ring sealing ring, 111-spring seat, 112-limiting tip, 113-connecting hole, 114-limiting slot, 115-limiting hole, 116-installation slot, 117-fastening bolt, 201-limiting sheet, 202-connecting bolt, 203-slotted guide. DETAILED DESCRIPTION

[0020] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, the embodiments described below by referring to the drawings are exemplary, and are intended to explain the utility model, and can not be understood as the limitation of the utility model.

[0021] First embodiment

[0022] Please refer to Figures 1-5 , Figure 1 is the structural schematic view of the whole of the first embodiment of the utility model. Figure 2 is the structural schematic view of the cover and the limiting tip of the first embodiment of the utility model. Figure 3 is the structural schematic view of the static sealing mechanism and the limiting hole of the first embodiment of the utility model. Figure 4 is the structural schematic view of the dynamic sealing mechanism and the installation slot of the first embodiment of the utility model. Figure 5 is the internal structure schematic view of the installation pipe of the first embodiment of the utility model.

[0023] The utility model provides a kind of double sealing ring sealing assembly: including cover 101, static sealing mechanism, bush 102, dynamic sealing mechanism, mounting ring 103, two installation pipes 104, two pistons 105 and two connecting rods 106, the static sealing mechanism includes static ring 107 and static ring sealing ring 108, the dynamic sealing mechanism includes moving ring 109, moving ring sealing ring 110 and spring seat 111, by the above structure, it is solved that spring can not be adjusted, spring is in the same state for a long time, its elastic force can weaken, and then the problem of affecting sealing performance.

[0024] For the specific embodiment, the grommet 101 is internally provided with two limiting pins 112, the grommet 101 is provided with a connecting hole 113 at the end, the static sealing mechanism is arranged in the grommet 101, the shaft sleeve 102 is inserted into the grommet 101, and the limiting groove 114 is arranged on the shaft sleeve 102, the dynamic sealing mechanism is arranged on the outer side wall of the shaft sleeve 102, the mounting ring 103 is provided with four fastening studs 117, the mounting ring 103 is sleeved with the outer side wall of the shaft sleeve 102 and connected with the shaft sleeve 102 through the fastening studs 117, two mounting pipes 104 are oppositely arranged on the end face of the mounting ring 103 close to the dynamic sealing mechanism, two pistons 105 are movably arranged in the two mounting pipes 104 respectively, one end of two connecting rods 106 is fixedly connected with two pistons 105 respectively, and the other end of two connecting rods 106 is connected with the dynamic sealing mechanism respectively, the limiting pins 112 on the grommet 101 are used for fixing the static sealing mechanism, the shaft sleeve 102 is used for protecting the rotating shaft, the grommet 101, the static sealing mechanism, the shaft sleeve 102 and the dynamic sealing mechanism cooperate with each other to realize the sealing between the rotating shaft and the machine body, prevent fluid leakage, the mounting ring 103 can be fixed through the fastening studs 117, the mounting ring 103 is used for mounting two mounting pipes 104, the mounting pipe 104 is provided with a valve, when not in use, the external origin can enter the mounting pipe 104 through the air inlet and act on the piston 105, thereby driving the connecting rod 106 to move linearly, since the connecting rod 106 is connected with the dynamic sealing mechanism, the dynamic sealing mechanism can be in a natural stretching state, avoiding that the dynamic sealing mechanism is in the same state for a long time, causing the performance of the internal spring to weaken, solving the problem that the spring cannot be adjusted, the spring is in the same state for a long time, the elastic force of the spring may be weakened, thereby affecting the sealing performance.

[0025] Among them, the static ring 107 is inserted with the grommet 101, and the static ring 107 is provided with two limiting holes 115 matched with the limiting pins 112, the static ring seal ring 108 is sleeved on the outer side wall of the static ring 107, the static ring 107 and the dynamic sealing mechanism are in contact with each other to form a sealing surface, which prevents fluid leakage together, and the static ring seal ring 108 is used to ensure the sealing between the static ring 107 and the grommet 101.

[0026] The spring seat 111 is sleeved on the outer side wall of the shaft sleeve 102, and the spring seat 111 is provided with a mounting groove 116 matched with the dynamic ring 109, the dynamic ring 109 is inserted into the mounting groove 116, the dynamic ring sealing ring 110 is sleeved on the inner side wall of the dynamic ring 109, two connecting rods 106 are fixedly connected with the spring seat 111 respectively, the dynamic ring 109 cooperates with the static ring 107 to prevent fluid leakage, the dynamic ring sealing ring 110 is used to ensure the close contact between the dynamic ring 109 and the shaft sleeve 102, and the spring seat 111 is used to ensure the close contact between the dynamic ring 109 and the static ring 107.

[0027] When the double-seal ring sealing assembly is not used, the valve is adjusted, the external origin enters the mounting pipe 104 through the air inlet and acts on the piston 105, the piston 105 drives the connecting rod 106 to move linearly, and then the position of the spring seat 111 is adjusted, so that the spring seat 111 is in a natural stretching state, the problem that the spring cannot be adjusted and the elasticity of the spring may be weakened for a long time in the same state is solved, and the sealing performance is affected.

[0028] Second embodiment

[0029] Please refer to Figure 6 , Figure 6 It is the overall structure schematic view of the second embodiment of the utility model.

[0030] On the basis of the first embodiment, the double-seal ring sealing assembly further comprises four fixing mechanisms, the fixing mechanism comprises a limiting piece 201 and a connecting bolt 202.

[0031] According to the specific embodiment, the four fixing mechanisms are arranged above the four connecting holes 113 respectively, and the four fixing mechanisms are used for limiting the shaft sleeve 102 to prevent the shaft sleeve 102 from deviating during movement.

[0032] The limiting sheet 201 is movably arranged above the connecting hole 113, and the limiting sheet 201 is matched with the limiting groove 114; the connecting bolt 202, the sliding groove 203 and the connecting hole 113 are matched with each other; the connecting bolt 202 passes through the sliding groove 203 and is threadedly connected with the connecting hole 113; the limiting sheet 201 is used for limiting the shaft sleeve 102, so that the shaft sleeve 102 is prevented from deviating during movement; and the connecting bolt 202 is used for fixing the limiting sheet 201, and meanwhile, the connecting bolt 202 is loosened, so that the limiting sheet 201 can slide, thereby facilitating a user to disassemble.

[0033] The above only discloses one or more preferred embodiments of the present application, and cannot limit the scope of the present application. Those skilled in the art can understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A double seal ring seal assembly characterized by, The utility model provides a double seal ring seal assembly, which comprises a gland, a static sealing mechanism, a shaft sleeve, a dynamic sealing mechanism, a mounting ring, two mounting pipes, two pistons and two connecting rods, the gland is internally provided with two limiting pins, the gland is provided with a connecting hole at the end, the static sealing mechanism is arranged in the gland, the shaft sleeve is inserted into the gland, the shaft sleeve is provided with a limiting groove, the dynamic sealing mechanism is arranged on the outer side wall of the shaft sleeve, the mounting ring is provided with four fastening bolts, the mounting ring is sleeved with the outer side wall of the shaft sleeve and connected with the shaft sleeve through the fastening bolts, two mounting pipes are oppositely arranged on the end face of the mounting ring close to the dynamic sealing mechanism, two pistons are movably arranged in the two mounting pipes respectively, one end of two connecting rods is fixedly connected with two pistons respectively, and the other end of two connecting rods is connected with the dynamic sealing mechanism respectively.

2. The double seal ring seal assembly of claim 1, wherein, the static sealing mechanism comprises a static ring and a static ring sealing ring, the static ring is inserted into the gland, and the static ring is provided with two limiting holes matched with the limiting pins, and the static ring sealing ring is sleeved on the outer side wall of the static ring.

3. The double seal ring seal assembly of claim 1, wherein, the dynamic sealing mechanism comprises a dynamic ring, a dynamic ring sealing ring and a spring seat, the spring seat is sleeved on the outer side wall of the shaft sleeve, the spring seat is provided with a mounting groove matched with the dynamic ring, the dynamic ring is inserted into the mounting groove, the dynamic ring sealing ring is sleeved on the inner side wall of the dynamic ring, and two connecting rods are fixedly connected with the spring seat respectively.

4. The double seal ring seal assembly of claim 1, wherein, the double seal ring seal assembly further comprises four fixing mechanisms, and the four fixing mechanisms are arranged above the four connecting holes respectively.

5. The double seal ring seal assembly of claim 4, wherein, the fixing mechanism comprises a limiting piece and a connecting bolt, the limiting piece is movably arranged above the connecting hole and matched with the limiting groove, the connecting bolt, the sliding groove and the connecting hole are matched with each other, and the connecting bolt passes through the sliding groove and is screw-connected with the connecting hole.

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