Non-clamp-spring groove type fixed mechanical sealing structure

Abstract

The utility model belongs to the technical field of deep-well pumps, and particularly relates to a non-clamp-spring groove type fixed mechanical sealing structure. The pump assembly comprises a pump body assembly part, a rotor assembly is arranged in the pump body assembly part, a mechanical seal is arranged at the joint of the pump body assembly part and the rotor assembly, a spring part and a gland part are arranged above the rotor assembly, and a rotor fixing ring and a set screw are inserted into a positioning hole part arranged above a penetrating-out section of the rotor assembly. A rotor fixing ring is arranged above the rotor assembly, a mechanical seal is arranged above the rotor assembly, a sand throwing seat and a sand throwing cup are arranged above the rotor assembly, and the lower wall of the sand throwing seat is connected with the top of the pump body assembly. The situation that the original snap spring abrades the snap spring groove in the rotor and grinds the rotor assembly is prevented, and product failure is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of deep well pumps and relates to a non-circlip groove type fixed mechanical sealing structure. Background Art

[0002] A deep well pump is a type of pump that is immersed in a groundwater well to pump and transport water. It is widely used in farmland irrigation and drainage, industrial and mining enterprises, urban water supply and drainage, and sewage treatment. Unlike other pumps, a deep well pump has a multi-stage impeller. When the deep well pump is running, the motor shaft of the deep well pump's motor will drive multiple impellers to rotate simultaneously, thereby driving the flow of water. When the deep well pump is operating in a large flow range, the pump head is very low. At this time, the impeller will float upward along the trajectory of the motor shaft, causing an upward string phenomenon. The external mechanical seal of existing traditional deep well pump products often uses a retaining spring for positioning. Using this structure, a retaining spring groove needs to be machined on the rotor. This structure sometimes causes the retaining spring to rotate in the retaining spring groove, then grind the retaining spring groove larger, or even wear through the rotor, causing the product to fail. Therefore, in response to the above problems, a non-retaining spring groove fixed mechanical seal structure is proposed. Utility Model Content

[0003] The purpose of the utility model is to provide a non-circlip groove type fixed mechanical seal structure in order to solve the above problems.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A non-circlip groove type fixed mechanical seal structure includes a pump body assembly, a rotor assembly is provided in the pump body assembly, and the pump body assembly passes through the top of the rotor assembly, a mechanical seal is provided at the connection between the top of the pump body assembly and the rotor assembly, and the mechanical seal sleeve is arranged on the outside of the rotor assembly, a spring part is provided on the outer sleeve above the rotor assembly, and a pressure cover part is provided above the spring part, rotor fixing rings are provided on both sides of the top of the rotor assembly, and set screws are inserted in the rotor fixing ring and the side wall of the rotor assembly, and the rotor fixing ring is placed above the pressure cover part, and the rotor fixing ring and the pressure cover part are provided with a sand throwing seat, and the sand throwing seat is provided with a sand throwing cup on the outer sleeve, and the sand throwing seat and the sand throwing cup are both sleeved outside the top of the rotor assembly.

[0006] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the fixed connection mechanical seal is inserted into the top of the pump body assembly, and the top of the mechanical seal passes through the top of the pump body assembly. The mechanical seal outlet end is sleeved outside the top of the rotatably connected rotor assembly, and the top of the rotor assembly passes through the top of the pump body assembly.

[0007] In the above-mentioned non-circlip groove type fixed mechanical seal structure, a sliding connection spring member is provided outside the middle portion of the rotor assembly passing through the segment, and there is a distance between the bottom of the spring member and the top of the mechanical seal.

[0008] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the top of the spring part is fixedly connected to the gland part, and the gland part is sleeved on the middle part of the sliding connection rotor assembly through the section, and the inner side wall of the gland part is tightly fitted with the outer side wall of the spring part.

[0009] In the above-mentioned non-circlip groove type fixed mechanical seal structure, positioning holes are opened on both sides of the middle part of the rotor assembly passing section, and the two positioning holes are symmetrical to each other, and the inner ends of the fixing screws are inserted into the positioning holes for fixing.

[0010] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the outer end of the set screw is sleeved and fixedly connected to the rotor fixing ring, and the inner side of the rotor fixing ring is tightly fitted with both sides of the rotor assembly, the bottom of the rotor fixing ring is tightly fitted with the top of the pressure cover, and the outer end of the rotor fixing ring does not exceed the side wall of the pressure cover.

[0011] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the outer shell above the rotor assembly passing through the section is rotatably connected to the top of the sand throwing seat, and the bottom of the sand throwing seat is fixedly connected to the top of the pump body assembly.

[0012] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the inner wall of the top opening of the sand-sparing seat is tightly fitted with the side wall of the rotor fixing ring, and there is a gap between the inner side surface of the sand-sparing seat side wall and the outer side wall of the gland member.

[0013] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the outer middle portion of the sand-sweeping seat side wall and the inner wall of the sand-sweeping cup side wall are mutually clamped, and a through hole portion is opened on the top of the sand-sweeping cup.

[0014] In the above-mentioned non-circlip groove type fixed mechanical seal structure, the through hole portion is sleeved outside the step above the passing section of the rotating rotor assembly, and there is a gap between the bottom of the sand throwing cup and the top of the bottom section of the sand throwing seat.

[0015] Compared with the existing technology, the advantages of this utility model are:

[0016] The utility model is characterized in that a rotor assembly is provided in a pump body assembly, and a mechanical seal is provided at the connection between the pump body assembly and the rotor assembly, a spring part and a pressure cover part are provided above the rotor assembly, a rotor fixing ring and a set screw are inserted into a positioning hole part provided above the passing section of the rotor assembly, a sand throwing seat and a sand throwing cup are provided above the rotor assembly, and the lower wall of the sand throwing seat is connected to the top of the pump body assembly, and the rotor fixing ring provided above the rotor assembly is fixedly connected. When the rotor assembly is running, the rotor fixing ring and the mechanical seal will run synchronously, thereby preventing the original retaining spring from wearing the retaining spring groove in the rotor and wearing the rotor assembly, thereby avoiding product failure.

[0017] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is an enlarged schematic diagram of point A of the present utility model;

[0020] Figure 3 It is a cross-sectional diagram of the upper structure of the present invention;

[0021] Figure 4 It is an enlarged schematic diagram of point B of the present utility model;

[0022] Figure 5 The utility model is a cross-sectional schematic diagram of the cooperation between the sand throwing cup and the sand throwing seat.

[0023] In the figure: 1. Pump body assembly; 2. Rotor assembly; 201. Positioning hole; 3. Sand throwing cup; 301. Through hole; 4. Sand throwing seat; 5. Gland; 6. Spring; 7. Rotor fixing ring; 8. Set screw; 9. Mechanical seal. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] like Figure 1-5 As shown, a non-circlip groove type fixed mechanical seal structure includes a pump body assembly 1, a rotor assembly 2 is provided in the pump body assembly 1, and the pump body assembly 1 passes through the top of the rotor assembly 2, a mechanical seal 9 is provided at the connection between the top of the pump body assembly 1 and the rotor assembly 2, and the mechanical seal 9 is sleeved on the outside of the rotor assembly 2, a spring part 6 is provided on the outer sleeve of the rotor assembly 2, and a pressure cover part 5 is provided above the spring part 6, rotor fixing rings 7 are provided on both sides of the top of the rotor assembly 2, and set screws 8 are inserted in the rotor fixing ring 7 and the side wall of the rotor assembly 2, and the rotor fixing ring 7 is placed above the pressure cover part 5, and the rotor fixing ring 7 and the pressure cover part 5 are sleeved with a sand throwing seat 4, and the sand throwing seat 4 is sleeved with a sand throwing cup 3, and the sand throwing seat 4 and the sand throwing cup 3 are sleeved outside the top of the rotor assembly 2.

[0026] The mechanical seal 9 is fixedly connected by being inserted into the top of the pump body assembly 1, and the top of the mechanical seal 9 passes through the top of the pump body assembly 1. The passing end of the mechanical seal 9 is sleeved outside the top of the rotatably connected rotor component 2, and the top of the rotor component 2 passes through the top of the pump body assembly 1.

[0027] After the rotor assembly 2 provided in the pump body assembly 1 is passed through, the protruding end of the rotor assembly 2 is used to connect to the external work, and after a mechanical seal 9 is provided at the connection between the pump body assembly 1 and the rotor assembly 2, the mechanical seal 9 will seal the connection so that no debris will be inside the pump body assembly 1.

[0028] Furthermore, a sliding connection spring member 6 is provided on the outer middle portion of the rotor assembly 2 passing through the section, and there is a distance between the bottom of the spring member 6 and the top of the mechanical seal 9 .

[0029] Furthermore, the top of the spring member 6 is fixedly connected to the gland member 5, and the gland member 5 is sleeved on the middle part of the passage section of the sliding connection rotor assembly 2, while the inner side wall of the gland member 5 is tightly fitted with the outer side wall of the spring member 6.

[0030] A spring part 6 and a gland part 5 are provided on the outer sleeve of the rotor assembly 2. The gland part 5 is used to prevent the spring part 6 from deflecting or moving. The combination of the spring part 6 and the gland part 5 provides a certain buffer for the rotor assembly 2 when it is connected to the outside, thereby avoiding collision between the pump body assembly 1, the rotor assembly 2 and the internal structure.

[0031] Positioning holes 201 are provided on both sides of the middle portion of the rotor assembly 2 , and the two positioning holes 201 are symmetrical to each other. The inner ends of the set screws 8 are inserted and fixed into the positioning holes 201 .

[0032] Furthermore, the outer end of the set screw 8 is sleeved and fixedly connected to the rotor fixing ring 7, and the inner side of the rotor fixing ring 7 is tightly fitted with both sides of the rotor assembly 2, the bottom of the rotor fixing ring 7 is tightly fitted with the top of the pressure cover 5, and the outer end of the rotor fixing ring 7 does not exceed the side wall of the pressure cover 5.

[0033] Rotor fixing rings 7 are provided on both sides above the rotor assembly 2 , and the rotor fixing rings 7 and the rotor assembly 2 are positioned with set screws 8 . When the rotor assembly 2 is working, the rotor fixing rings 7 will operate synchronously.

[0034] The rotor assembly 2 passes through the outer casing above the section and is rotatably connected to the top of the sand-slinging seat 4, and the bottom of the sand-slinging seat 4 is fixedly connected to the top of the pump body assembly 1.

[0035] Furthermore, the inner wall of the top opening of the sand-swing seat 4 is tightly fitted with the side wall of the rotor fixing ring 7 , and there is a gap between the inner side surface of the side wall of the sand-swing seat 4 and the outer side wall of the pressure cover 5 .

[0036] Furthermore, the outer middle portion of the side wall of the sand-swinging seat 4 and the inner wall of the side wall of the sand-swinging cup 3 are mutually engaged, and a through hole portion 301 is opened at the top of the sand-swinging cup 3.

[0037] The sand-slinging seat 4 provided above the rotor assembly 2 is connected to the top of the pump body assembly 1, so that the sand-slinging seat 4 will protect the rotor fixing ring 7 structure, the pressure cover 5, the spring part 6 and the top of the mechanical seal 9.

[0038] Furthermore, the through hole portion 301 is sleeved outside the step above the passing section of the rotating rotor assembly 2 , and there is a gap between the bottom of the sand throwing cup 3 and the top of the bottom section of the sand throwing seat 4 .

[0039] A sand-throwing seat 4 and a sand-throwing cup 3 are respectively provided above the rotor assembly 2, and the sand-throwing seat 4 and the sand-throwing cup 3 are placed outside the rotor fixing ring 7 and the gland 5, so that the sand-throwing cup 3 protects the top, and the lower side of the sand-throwing seat 4 can protect the interior.

[0040] Working principle:

[0041] A rotor assembly 2 is provided in the pump body assembly 1, and the upper part of the rotor assembly 2 passes through the top of the pump body assembly 1, and the passing end of the rotor assembly 2 is connected to the outside for work. A mechanical seal 9 is provided at the connection between the pump body assembly 1 and the rotor assembly 2, and the mechanical seal 9 is used to seal the connection between the two, but the mechanical seal 9 will not hinder the operation of the rotor assembly 2. A spring part 6 and a pressure cover part 5 are provided above the rotor assembly 2. The top of the spring part 6 will be protected by the pressure cover part 5. At the same time, the spring part 6 plays a buffering role for the rotor assembly 2 during operation, protecting the entire rotor assembly 2. A rotor fixing ring 7 and a set screw 8 are inserted into the positioning hole portion 201 provided above the passing section of the rotor assembly 2, so that the rotor fixing ring 7 is connected to the rotor assembly 2 as a whole through the set screw 8. Then, when the rotor assembly 2 is in operation, the rotor fixing ring 7, the mechanical seal 9 and the rotor assembly 2 operate synchronously, and the rotor fixing ring 7 will not wear the outer wall above the rotor assembly 2 during operation.

[0042] In addition, a sand throwing seat 4 and a sand throwing cup 3 are provided above the rotor assembly 2, and the sand throwing seat 4 is sleeved on the outside of the rotor fixing ring 7 and the pressure cover 5, and the sand throwing cup 3 is placed outside the top of the sand throwing seat 4. At the same time, the top of the sand throwing cup 3 is tightly fitted with the outer wall of the rotor assembly 2, so the sand throwing cup 3 protects the internal lower structure, and the lower wall of the sand throwing seat 4 is connected to the top of the pump body assembly 1, so that the side wall of the sand throwing seat 4 will provide side protection to the structure above the pump body assembly 1.

[0043] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described, or replace them with similar methods, without departing from the spirit of the present invention.

[0044] Although this document frequently uses terms such as 1. pump body assembly; 2. rotor assembly; 201. positioning hole portion; 3. sand-stripping cup; 301. through-hole portion; 4. sand-stripping seat; 5. gland member; 6. spring member; 7. rotor retaining ring; 8. set screw; and 9. mechanical seal, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A non-circlip groove type fixed mechanical seal structure, comprising a pump body assembly (1), wherein a rotor assembly (2) is provided in the pump body assembly (1), and the rotor assembly (2) passes through the pump body assembly (1) from above, characterized in that: A mechanical seal (9) is provided at the connection between the pump body assembly (1) and the rotor assembly (2), and the mechanical seal (9) is sleeved on the outside of the rotor assembly (2); a spring member (6) is provided on the outer sleeve of the rotor assembly (2), and a pressure cover member (5) is provided on the upper side of the spring member (6); rotor fixing rings (7) are provided on both sides of the upper side of the rotor assembly (2), and set screws (8) are inserted into the rotor fixing ring (7) and the side wall of the rotor assembly (2); at the same time, the rotor fixing ring (7) is placed above the pressure cover member (5); a sand throwing seat (4) is provided on the outer sleeve of the rotor fixing ring (7) and the pressure cover member (5), and a sand throwing cup (3) is provided on the outer sleeve of the sand throwing seat (4); at the same time, the sand throwing seat (4) and the sand throwing cup (3) are sleeved on the upper side of the rotor assembly (2).

2. The non-circlip groove type fixed mechanical seal structure according to claim 1, characterized in that: A fixedly connected mechanical seal (9) is inserted into the top of the pump body assembly (1), and the upper portion of the mechanical seal (9) passes through the top of the pump body assembly (1). The protruding end of the mechanical seal (9) is sleeved outside the upper portion of the rotatably connected rotor assembly (2), and the upper portion of the rotor assembly (2) passes through the top of the pump body assembly (1).

3. The non-circlip groove type fixed mechanical seal structure according to claim 2, characterized in that: A sliding connection spring component (6) is provided on the outer portion of the middle portion of the protruding section of the rotor assembly (2), and a distance is provided between the bottom of the spring component (6) and the top of the mechanical seal (9).

4. The non-circlip groove type fixed mechanical seal structure according to claim 3, characterized in that: The top of the spring member (6) is fixedly connected to the gland member (5), and the gland member (5) is sleeved on the middle part of the protruding section of the sliding connection rotor assembly (2), while the inner side wall of the gland member (5) is tightly fitted with the outer side wall of the spring member (6).

5. The non-circlip groove type fixed mechanical seal structure according to claim 4, characterized in that: Positioning holes (201) are provided on both sides of the middle portion of the rotor assembly (2), and the two positioning holes (201) are symmetrical to each other. The inner ends of the fixing screws (8) are inserted into the positioning holes (201) for fixing.

6. The non-circlip groove type fixed mechanical seal structure according to claim 5, characterized in that: The outer end of the set screw (8) is sleeved and fixedly connected to the rotor fixing ring (7), and the inner side of the rotor fixing ring (7) is tightly fitted with both sides of the rotor assembly (2), the bottom of the rotor fixing ring (7) is tightly fitted with the top of the pressure cover (5), and the outer end of the rotor fixing ring (7) does not extend beyond the side wall of the pressure cover (5).

7. The non-circlip groove type fixed mechanical seal structure according to claim 6, characterized in that: The rotor assembly (2) is provided with an outer shell above the passing section and is rotatably connected to the top of the sand throwing seat (4), and the bottom of the sand throwing seat (4) is fixedly connected to the top of the pump body assembly (1).

8. The non-circlip groove type fixed mechanical seal structure according to claim 7, characterized in that: The inner wall of the top opening of the sand-swing seat (4) is tightly fitted with the side wall of the rotor fixing ring (7), and a gap is formed between the inner side of the side wall of the sand-swing seat (4) and the outer side of the side wall of the pressure cover (5).

9. The non-circlip groove type fixed mechanical seal structure according to claim 8, characterized in that: The outer middle portion of the side wall of the sand-swing seat (4) and the inner wall of the side wall of the sand-swing cup (3) are mutually clamped, and a through hole portion (301) is provided on the top of the sand-swing cup (3).

10. The non-circlip groove type fixed mechanical seal structure according to claim 9, characterized in that: The through hole portion (301) is sleeved outside the step above the passing section of the rotating rotor assembly (2), and there is a distance between the bottom of the sand throwing cup (3) and the upper part of the bottom section of the sand throwing seat (4).

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