Mechanical sealing structure for pump

Abstract

The utility model relates to a mechanical sealing structure for a pump. The mechanical sealing structure comprises a mounting unit, an elastic unit, a first sealing unit and a second sealing unit. The sealing device has the advantages that the extruded degree of the elastic unit is adjusted through cooperation of the mounting unit, the elastic unit and the adjusting unit, and then the pressure of the first sealing unit making contact with the second sealing unit is adjusted, so that the pressure of the elastic unit is adjusted according to needs when equipment runs or stops, the maintenance cost is reduced, and the maintainability and usability of the equipment are improved; and all parts of the mechanical seal can be accurately installed at designated positions through the installation unit, the coaxiality of the movable ring and the static ring is guaranteed, a foundation is laid for the elastic unit and the adjusting unit to play a role, the sealing faces are in uniform contact, and the leakage risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump mechanical seal structure related technical field, especially pump mechanical seal structure. BACKGROUND

[0002] Mechanical seal is a kind of shaft seal device for rotating machinery, also be called end face seal. It is mainly composed of dynamic ring, static ring, spring, sealing ring etc. Its working principle is to rely on the end face of dynamic ring and static ring under the action of spring force and medium pressure and mutually adhere, form a narrow sealing surface, prevent medium leakage. Dynamic ring is installed on the rotating shaft, rotates along with shaft, static ring is fixed on the sealing cavity. When equipment runs, there is a very thin liquid film between the sealing surface of dynamic ring and static ring, plays lubrication and cooling effect, reduces friction and wear, guarantees sealing performance. Mechanical seal has good sealing performance, small leakage, long service life, low power consumption and other advantages, is widely used in various pumps, compressors and other rotating equipment in petroleum, chemical industry, electric power, pharmaceutical industry etc.

[0003] The existing mechanical seal is extruded to the sealing ring by compensation mechanism, so that the mechanical seal always maintains sufficient sealing effect, but if the pressure provided by the spring is too low, the sealing effect of the sealing ring will be damaged, and if the pressure provided by the spring is too large, the friction force received by the sealing ring will be increased, which will reduce the service life of the sealing ring.

[0004] At present, for the problem of inconvenient spring pressure adjustment in the related art, which leads to the reduction of the service life of the sealing ring, an effective solution has not been proposed. UTILITY MODEL CONTENT

[0005] The utility model aims at the deficiency in the prior art, provides a kind of pump mechanical seal structure, to solve the inconvenient spring pressure adjustment in the related art, which leads to the reduction of the service life of the sealing ring Problem.

[0006] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is:

[0007] A kind of pump mechanical seal structure, comprising:

[0008] mounting unit;

[0009] elastic unit, the elastic unit is movably arranged in the second end of the mounting unit;

[0010] first sealing unit, the first sealing unit is detachably arranged in the second end of the elastic unit, for moving along the axial direction of the mounting unit under the action of the elastic unit;

[0011] A second sealing unit is arranged at a second end of the first sealing unit to seal the machine with the first sealing unit.

[0012] In some embodiments, the mounting unit comprises:

[0013] A mounting element, a first end of which is provided with the first sealing unit;

[0014] A first through-slot element is arranged through the mounting element for the shaft to pass through;

[0015] Two first sliding elements are symmetrically arranged at the mounting element and are respectively in sliding connection with the elastic unit.

[0016] In some embodiments, the elastic unit comprises:

[0017] A first connecting element is movably arranged at a second end of the mounting unit;

[0018] A second through-slot element is arranged through the first connecting element for the mounting unit to pass through;

[0019] An elastic element is arranged at a first end of the first connecting element and is connected with the first connecting element;

[0020] A second connecting element is movably arranged at a second end of the elastic element, is in contact with the first sealing unit, and is connected with the elastic element;

[0021] A third through-slot element is arranged through the second connecting element for the shaft to pass through.

[0022] In some embodiments, the elastic unit further comprises:

[0023] Two second sliding elements are symmetrically arranged at the inner side of the second through-slot element and are respectively in sliding connection with the mounting unit;

[0024] A first docking element is arranged at a second end of the second connecting element and is detachably connected with the first sealing unit.

[0025] In some embodiments, the first sealing unit comprises:

[0026] A first sealing element is detachably arranged at the second end of the elastic unit, and a second end of the first sealing element is provided with the second sealing unit, which is used for sealing the machine under the action of the elastic unit and the cooperation of the second sealing unit along the axial direction of the mounting unit.

[0027] A fourth through slot element is arranged through the first sealing element, and is used for passing the shaft.

[0028] In some embodiments, the first sealing unit further comprises:

[0029] A second abutting element is arranged at the second end of the first sealing element and is detachably connected with the elastic unit.

[0030] In some embodiments, the second sealing unit comprises:

[0031] A second sealing element is arranged at the second end of the first sealing unit, and is used for sealing the machine in cooperation with the first sealing unit.

[0032] A fifth through slot element is arranged through the second sealing element, and is used for passing the shaft.

[0033] In some embodiments, the mechanical sealing structure for the pump further comprises:

[0034] An adjusting unit is movably arranged at the first end of the mounting unit and abuts against the first end of the elastic unit, and is used for adjusting the position of the elastic unit in the mounting unit.

[0035] In some embodiments, the mounting unit further comprises:

[0036] A third connecting element is arranged at the mounting unit and is connected with the adjusting unit.

[0037] In some embodiments, the adjusting unit comprises:

[0038] An adjusting element is movably arranged at the first end of the mounting unit and abuts against the first end of the elastic unit, and is used for adjusting the position of the elastic unit in the mounting unit.

[0039] A fourth connecting element is arranged at the adjusting element and is connected with the mounting unit.

[0040] The above technical scheme is adopted, and compared with the prior art, the following technical effects are achieved:

[0041] The utility model discloses a pump is with mechanical seal structure, utilizes the cooperation of installation unit, elastic unit, adjusting unit and adjusts the degree of compression of elastic unit, and then adjusts the pressure of first sealing unit contact second sealing unit, makes the equipment operation or shutdown as needed adjustment elastic unit pressure, reduces the maintenance cost, improves the maintainability and usability of equipment, and installation unit can be used to install the mechanical seal each component accurately in the specified position, guarantees the coaxality of dynamic ring and static ring, lays the foundation for the function of elastic unit and adjusting unit, makes the sealing surface even contact, reduces the risk of leakage. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 It is the three-dimensional structure schematic diagram of pump with mechanical seal structure according to the utility model embodiment;

[0043] Figure 2 It is the explosion drawing of pump with mechanical seal structure according to the utility model embodiment;

[0044] Figure 3 It is the three-dimensional structure schematic diagram of installation unit according to the utility model embodiment (one);

[0045] Figure 4a It is the three-dimensional structure schematic diagram of elastic unit according to the utility model embodiment;

[0046] Figure 4b It is the three-dimensional structure schematic diagram of elastic unit according to the utility model embodiment;

[0047] Figure 5 It is the three-dimensional structure schematic diagram of first sealing unit according to the utility model embodiment;

[0048] Figure 6 It is the three-dimensional structure schematic diagram of second sealing unit according to the utility model embodiment;

[0049] Figure 7 It is the three-dimensional structure schematic diagram of installation unit according to the utility model embodiment (two);

[0050] Figure 8 It is the three-dimensional structure schematic diagram of adjusting unit according to the utility model embodiment.

[0051] The reference signs among them are: 10, installation unit;11, installation element;12, first through slot element;13, first sliding element;14, third connecting element;

[0052] 20, elastic unit;21, first connecting element;22, second through slot element;23, elastic element;24, second connecting element;25, third through slot element;26, second sliding element;27, first butt joint element;

[0053] 30. First sealing unit; 31. First sealing element; 32. Fourth through groove element; 33. Second mating element;

[0054] 40. Second sealing unit; 41. Second sealing element; 42. Fifth through groove element;

[0055] 50. Adjustment unit; 51. Adjustment element; 52. Fourth connecting element. Detailed Implementation

[0056] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0057] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0058] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0059] An illustrative embodiment of this utility model, such as Figure 1 , Figure 2 As shown, a mechanical seal structure for a pump includes a mounting unit 10, an elastic unit 20, a first sealing unit 30, and a second sealing unit 40. The elastic unit 20 is movably disposed at the second end of the mounting unit 10; the first sealing unit 30 is detachably disposed at the second end of the elastic unit 20 and is used to move axially along the mounting unit 10 under the action of the elastic unit 20; the second sealing unit 40 is disposed at the second end of the first sealing unit 30 and is used to cooperate with the first sealing unit 30 to seal the mechanical seal.

[0060] like Figure 3 As shown, the mounting unit 10 includes a mounting element 11, a first through groove element 12, and two first sliding elements 13. The first end of the mounting element 11 is provided with a first sealing unit 30; the first through groove element 12 passes through the mounting element 11 for a shaft to pass through; the two first sliding elements 13 are symmetrically arranged on the mounting element 11 and are slidably connected to the elastic unit 20 respectively.

[0061] The cross-section of mounting element 11 is circular.

[0062] In some of these embodiments, the mounting element 11 is made of stainless steel.

[0063] In some of these embodiments, the mounting element 11 is a mounting sleeve.

[0064] The cross-section of the first through-slot element 12 is circular.

[0065] The dimensions of the first through-slot element 12 are matched with the dimensions of the mounting element 11. Generally, the radial dimension of the first through-slot element 12 is equal to the radial dimension of the mounting element 11, and the axial dimension of the first through-slot element 12 is equal to the axial dimension of the mounting element 11.

[0066] In some of these embodiments, the first through-slot element 12 is a first through-slot.

[0067] The cross-section of the first sliding element 13 is rectangular.

[0068] The dimensions of the first sliding element 13 are matched with the dimensions of the mounting element 11. Generally, the length of the first sliding element 13 is less than the axial dimension of the mounting element 11, and the width and height of the first sliding element 13 are less than the radial dimension of the mounting element 11.

[0069] In some embodiments, there are multiple first sliding elements 13. The multiple first sliding elements 13 are arranged at equal intervals along the circumference of the mounting element 11.

[0070] In some of these embodiments, the first sliding element 13 is a sliding groove.

[0071] like Figure 4a , Figure 4b As shown, the elastic unit 20 includes a first connecting element 21, a second through-slot element 22, an elastic element 23, a second connecting element 24, and a third through-slot element 25. The first connecting element 21 is movably disposed at the second end of the mounting unit 10; the second through-slot element 22 passes through the first connecting element 21 for the mounting unit 10 to pass through; the elastic element 23 is disposed at the first end of the first connecting element 21 and connected to it; the second connecting element 24 is movably disposed at the second end of the elastic element 23, and is in contact with the first sealing unit 30 and connected to the elastic element 23; the third through-slot element 25 passes through the second connecting element 24 for a shaft to pass through.

[0072] Specifically, the first connecting element 21 is sleeved on the first end of the mounting element 11.

[0073] The cross-section of the first connecting element 21 is circular.

[0074] The dimensions of the first connecting element 21 are matched with the dimensions of the mounting element 11. Generally, the radial dimension of the first connecting element 21 is larger than the radial dimension of the mounting element 11, and the axial dimension of the first connecting element 21 is smaller than the axial dimension of the mounting element 11.

[0075] In some embodiments, the first connecting element 21 is made of stainless steel.

[0076] In some embodiments, the first connecting element 21 is a first connecting plate.

[0077] The second through-slot element 22 has a circular cross-section

[0078] The second through-slot element 22 has a size matching that of the first connecting element 21. Generally, the radial dimension of the second through-slot element 22 is smaller than that of the first connecting element 21, and the axial dimension of the second through-slot element 22 is equal to that of the first connecting element 21.

[0079] The second through-slot element 22 has a size matching that of the mounting element 11. Generally, the radial dimension of the second through-slot element 22 is equal to that of the mounting element 11,

[0080] In some embodiments, the second through-slot element 22 is a second through-slot.

[0081] In some embodiments, the elastic element 23 is fixedly connected to the first connecting element 21, including but not limited to welding.

[0082] In some embodiments, the elastic element 23 is made of stainless steel.

[0083] In some embodiments, the elastic element 23 is a spring.

[0084] The second connecting element 24 has a circular cross-section

[0085] The second connecting element 24 has a size matching that of the first connecting element 21. Generally, the radial dimension of the second connecting element 24 is equal to that of the first connecting element 21, and the axial dimension of the second connecting element 24 is equal to that of the first connecting element 21.

[0086] In some embodiments, the second connecting element 24 is fixedly connected to the elastic element 23, including but not limited to welding.

[0087] In some embodiments, the second connecting element 24 is made of stainless steel.

[0088] In some embodiments, the second connecting element 24 is a second connecting plate.

[0089] The third through-slot element 25 has a circular cross-section

[0090] The third through-slot element 25 is sized to match the second connecting element 24. Generally, the radial dimension of the third through-slot element 25 is smaller than the radial dimension of the second connecting element 24, and the axial dimension of the third through-slot element 25 is equal to the axial dimension of the second connecting element 24.

[0091] The third through-slot element 25 is sized to match the first through-slot element 12. Generally, the radial dimension of the third through-slot element 25 is equal to the radial dimension of the first through-slot element 12,

[0092] In some embodiments, the third through-slot element 25 is a third through-slot.

[0093] Further, the elastic unit 20 further comprises two second sliding elements 26 and a first abutting element 27. The two second sliding elements 26 are symmetrically arranged on the inner side of the second through-slot element 22 and are respectively in sliding connection with the mounting unit 10; the first abutting element 27 is arranged at the second end of the second connecting element 24 and is in detachable connection with the first sealing unit 30.

[0094] Specifically, the two second sliding elements 26 are respectively in sliding connection with the corresponding first sliding elements 13.

[0095] The cross section of the second sliding element 26 is rectangular.

[0096] The second sliding element 26 is sized to match the second through-slot element 22. Generally, the length and height of the second sliding element 26 are smaller than the radial dimension of the second through-slot element 22, and the width of the second sliding element 26 is equal to the axial dimension of the second through-slot element 22.

[0097] The second sliding element 26 is sized to match the first sliding element 13. Generally, the length of the second sliding element 26 is equal to the width of the first sliding element 13, the width of the second sliding element 26 is smaller than the length of the first sliding element 13, and the height of the second sliding element 26 is equal to the height of the first sliding element 13.

[0098] The number of the second sliding elements 26 matches the number of the first sliding elements 13. Generally, the number of the second sliding elements 26 is equal to the number of the first sliding elements 13.

[0099] In some embodiments, the second sliding element 26 is a plurality of second sliding elements 26. The plurality of second sliding elements 26 are equidistantly arranged along the circumference of the second through-slot element 22.

[0100] In some embodiments, the second sliding element 26 is fixedly connected with the first connecting element 21, including but not limited to being integrally formed.

[0101] In some embodiments, the second sliding element 26 is made of stainless steel.

[0102] In some embodiments, the second sliding element 26 is a sliding block.

[0103] The first abutting element 27 has a circular ring shape in cross section.

[0104] The first abutting element 27 has a size matching that of the second connecting element 24. Generally, the radial dimension of the outer edge surface of the first abutting element 27 is smaller than the radial dimension of the second connecting element 24.

[0105] The first abutting element 27 has a size matching that of the third through-slot element 25. Generally, the radial dimension of the inner edge surface of the first abutting element 27 is larger than the radial dimension of the third through-slot element 25.

[0106] In some embodiments, the first abutting element 27 is fixedly connected to the second connecting element 24, including but not limited to being integrally formed.

[0107] In some embodiments, the first abutting element 27 is made of stainless steel.

[0108] In some embodiments, the first abutting element 27 is an abutting plate.

[0109] As shown in Figure 5 The first sealing unit 30 includes a first sealing element 31 and a fourth through-slot element 32. The first sealing element 31 is detachably arranged at the second end of the elastic unit 20, and the second end of the first sealing element 31 is provided with a second sealing unit 40 for sealing the machine under the action of the elastic unit 20 and in cooperation with the second sealing unit 40 along the axial direction of the mounting unit 10; the fourth through-slot element 32 is arranged through the first sealing element 31 for the shaft to pass through.

[0110] Specifically, the first sealing element 31 is detachably arranged at the second end of the second connecting element 24; the fourth through-slot element 32 is in communication with the third through-slot element 25.

[0111] The first sealing element 31 has a circular shape in cross section.

[0112] The first sealing element 31 has a size matching that of the second connecting element 24. Generally, the radial dimension of the first sealing element 31 is larger than the radial dimension of the second connecting element 24.

[0113] In some embodiments, the first sealing element 31 is made of graphite.

[0114] In some embodiments, the first sealing element 31 is a dynamic ring.

[0115] The cross-section of the fourth through slot element 32 is circular.

[0116] The dimensions of the fourth through-slot element 32 are matched with the dimensions of the first sealing element 31. Generally, the radial dimension of the fourth through-slot element 32 is smaller than the radial dimension of the first sealing element 31, and the axial dimension of the fourth through-slot element 32 is equal to the axial dimension of the first sealing element 31.

[0117] The dimensions of the fourth through-slot element 32 are matched with those of the third through-slot element 25. Generally, the radial dimension of the fourth through-slot element 32 is equal to the radial dimension of the third through-slot element 25.

[0118] In some of these embodiments, the fourth through slot element 32 is a fourth through slot.

[0119] Furthermore, the first sealing unit 30 also includes a second mating element 33. The second mating element 33 is disposed at the second end of the first sealing element 31 and is detachably connected to the elastic unit 20.

[0120] Specifically, the second docking element 33 is detachably connected to the first docking element 27.

[0121] The cross-section of the second docking element 33 is circular.

[0122] The dimensions of the second mating element 33 are matched with the dimensions of the first sealing element 31. Generally, the radial dimension of the outer edge of the second mating element 33 is smaller than the radial dimension of the first sealing element 31, and the axial dimension of the second mating element 33 is smaller than the axial dimension of the first sealing element 31.

[0123] The dimensions of the second mating element 33 are matched with the dimensions of the fourth through slot element 32. Generally, the radial dimension of the inner edge surface of the second mating element 33 is larger than the radial dimension of the fourth through slot element 32.

[0124] In some of these embodiments, the second docking element 33 is a docking groove.

[0125] like Figure 6 As shown, the second sealing unit 40 includes a second sealing element 41 and a fifth through groove element 42. The second sealing element 41 is disposed at the second end of the first sealing unit 30 and is used to cooperate with the first sealing unit 30 to seal the machinery; the fifth through groove element 42 is disposed through the second sealing element 41 and is used for the shaft to pass through.

[0126] Specifically, the second sealing element 41 is disposed at the second end of the first sealing element 31.

[0127] The second sealing element 41 has a circular cross-section.

[0128] The size of the second sealing element 41 matches the size of the first sealing element 31. Generally, the radial dimension of the second sealing element 41 is equal to the radial dimension of the first sealing element 31.

[0129] In some embodiments, the second sealing element 41 is made of graphite.

[0130] In some embodiments, the second sealing element 41 is a static ring.

[0131] The fifth through-slot element 42 has a circular cross-section.

[0132] The size of the fifth through-slot element 42 matches the size of the second sealing element 41. Generally, the radial dimension of the fifth through-slot element 42 is smaller than the radial dimension of the second sealing element 41, and the axial dimension of the fifth through-slot element 42 is equal to the axial dimension of the second sealing element 41.

[0133] The size of the fifth through-slot element 42 matches the size of the fourth through-slot element 32. Generally, the radial dimension of the fifth through-slot element 42 is equal to the radial dimension of the fourth through-slot element 32.

[0134] In some embodiments, the fifth through-slot element 42 is a fifth through-slot.

[0135] Further, as shown in Figure 1 , Figure 2 the pump mechanical seal structure further comprises an adjusting unit 50. The adjusting unit 50 is movably arranged at the first end of the mounting unit 10 and abuts against the first end of the elastic unit 20, and is used for adjusting the position of the elastic unit 20 in the mounting unit 10.

[0136] As shown in Figure 7 , the mounting unit 10 further comprises a third connecting element 14. The third connecting element 14 is arranged on the mounting unit 10 and connected with the adjusting unit 50.

[0137] Specifically, the third connecting element 14 is arranged on the mounting element 11.

[0138] The size of the third connecting element 14 matches the size of the mounting element 11. Generally, the axial dimension of the third connecting element 14 is smaller than the axial dimension of the mounting element 11.

[0139] In some embodiments, the third connecting element 14 is a threaded groove.

[0140] As shown in Figure 8As shown, the adjusting unit 50 comprises an adjusting element 51 and a fourth connecting element 52. Among them, the adjusting element 51 is movably arranged at the first end of the mounting unit 10 and abuts with the first end of the elastic unit 20, which is used to adjust the position of the elastic unit 20 in the mounting unit 10; the fourth connecting element 52 is arranged on the adjusting element 51 and connected with the mounting unit 10.

[0141] Specifically, the adjusting element 51 is movably arranged at the first end of the mounting element 11 and abuts with the first connecting element 21; the fourth connecting element 52 is threadedly connected with the third connecting element 14.

[0142] The outer edge surface of the adjusting element 51 is a regular hexagon in cross section, and the inner edge surface is a circle in cross section.

[0143] The size of the adjusting element 51 matches the size of the mounting element 11. Generally, the radial dimension of the inner edge surface of the adjusting element 51 is equal to the radial dimension of the mounting element 11, and the axial dimension of the adjusting element 51 is smaller than the axial dimension of the mounting element 11.

[0144] In some embodiments, the adjusting element 51 is made of stainless steel.

[0145] In some embodiments, the adjusting element 51 is an adjusting nut.

[0146] The size of the fourth connecting element 52 matches the size of the adjusting element 51. Generally, the axial dimension of the fourth connecting element 52 is equal to the axial dimension of the adjusting element 51.

[0147] The size of the fourth connecting element 52 matches the size of the third connecting element 14. Generally, the axial dimension of the fourth connecting element 52 is smaller than the axial dimension of the third connecting element 14.

[0148] In some embodiments, the fourth connecting element 52 is a threaded tooth.

[0149] The use method of the utility model is as follows:

[0150] (I) installation operation

[0151] The mounting element 11, the first connecting element 21, the elastic element 23 and the second connecting element 24 are sequentially threaded through the first through slot element 12 and the third through slot element 25 to pass through the pump shaft.

[0152] The first sealing element 31 is threaded through the fourth through slot element 32 to pass through the pump shaft, and is butted with the first butt joint element 27 through the second butt joint element 33.

[0153] The second sealing element 41 is threaded through the fifth through slot element 42 to pass through the pump shaft.

[0154] (ii) Adjusting operation

[0155] The twist adjusting element 51 is moved along the length direction of the first sliding element 13 by the adjusting element 51, so as to adjust the distance between the first connecting element 21 and the second connecting element 24, and increase or reduce the degree of extruding the elastic element 23, until the appropriate position is adjusted.

[0156] The utility model discloses the advantage lies in, utilize the cooperation of installation unit, elastic unit, adjusting unit between the adjustment elastic unit is extruded degree, and then adjust the pressure of the first sealing unit contact second sealing unit, make the equipment operation or shutdown as needed adjust elastic unit pressure, reduce maintenance cost, improve the maintainability and usability of equipment, and utilize installation unit can be the accurate installation of mechanical seal each component in the specified position, guarantee the coaxality of the moving ring and static ring, lay the foundation for the role of elastic unit and adjusting unit, make the sealing surface even contact, reduce the risk of leakage.

[0157] The above only is the preferred embodiment of the utility model, and does not therefore limit the implementation and protection scope of the utility model, and for the person skilled in the art, should be able to realize that the scheme obtained by the equivalent replacement and obvious change of the utility model specification and drawing content, should include in the protection scope of the utility model.

Claims

1. A mechanical seal structure for a pump, characterized by, The utility model relates to a sealing device for mechanical equipment, which comprises: a mounting unit (10); an elastic unit (20) movably arranged at the second end of the mounting unit (10); a first sealing unit (30) detachably arranged at the second end of the elastic unit (20) and movable along the axial direction of the mounting unit (10) under the action of the elastic unit (20); a second sealing unit (40) arranged at the second end of the first sealing unit (30) and used for sealing the mechanical equipment together with the first sealing unit (30); and an adjusting unit (50) movably arranged at the first end of the mounting unit (10) and abutting against the first end of the elastic unit (20), used for adjusting the position of the elastic unit (20) in the mounting unit (10).

2. The mechanical seal structure for a pump according to claim 1, characterized by The mounting unit (10) comprises: a mounting element (11) having the first sealing unit (30 arranged at the first end thereof; a first through slot element (12) arranged through the mounting element (11) and used for passing a shaft therethrough; two first sliding elements (13) symmetrically arranged at the mounting element (11) and respectively slidably connected with the elastic unit (20); and a third connecting element (14) arranged at the mounting unit (10) and connected with the adjusting unit (50).

3. The mechanical seal structure for a pump according to claim 1, characterized by The elastic unit (20) comprises: a first connecting element (21) movably arranged at the second end of the mounting unit (10); a second through slot element (22) arranged through the first connecting element (21) and used for passing the mounting unit (10) therethrough; an elastic element (23) arranged at the first end of the first connecting element (21) and connected with the first connecting element (21); a second connecting element (24) movably arranged at the second end of the elastic element (23), abutting against the first sealing unit (30) and connected with the elastic element (23); and a third through slot element (25) arranged through the second connecting element (24) and used for passing a shaft therethrough.

4. The mechanical seal structure for a pump according to claim 3, characterized by The elastic unit (20) further comprises: two second sliding elements (26) symmetrically arranged at the inner side of the second through slot element (22) and respectively slidably connected with the mounting unit (10); and a first butt joint element (27) arranged at the second end of the second connecting element (24) and detachably connected with the first sealing unit (30).

5. The mechanical seal structure for a pump according to claim 1, wherein The first sealing unit (30) comprises: a first sealing element (31) arranged at the first end of the first sealing unit (30) and used for sealing the mechanical equipment together with the second sealing unit (40); and a second sealing element (32) arranged at the second end of the first sealing unit (30) and used for sealing the mechanical equipment together with the first sealing element (31). A first sealing element (31) is detachably arranged at the second end of the elastic unit (20), and a second end of the first sealing element (31) is provided with the second sealing unit (40) for sealing the machine under the action of the elastic unit (20) and along the axial movement of the mounting unit (10) and cooperating with the second sealing unit (40); A fourth through slot element (32) is arranged through the first sealing element (31) for passing the shaft.

6. The mechanical seal structure for a pump according to claim 5, wherein The first sealing unit (30) further comprises: A second butt joint element (33) is arranged at the second end of the first sealing element (31) and detachably connected with the elastic unit (20).

7. The mechanical seal structure for a pump according to claim 1, characterized by The second sealing unit (40) comprises: A second sealing element (41) is arranged at the second end of the first sealing unit (30) for sealing the machine with the first sealing unit (30); A fifth through slot element (42) is arranged through the second sealing element (41) for passing the shaft.

8. The mechanical seal structure for a pump according to claim 1, characterized by The adjusting unit (50) comprises: An adjusting element (51) is movably arranged at the first end of the mounting unit (10) and abuts against the first end of the elastic unit (20) for adjusting the position of the elastic unit (20) in the mounting unit (10); A fourth connecting element (52) is arranged at the adjusting element (51) and connected with the mounting unit (10).

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