CN202301154U

CN202301154U - Mechanical seal

Info

Publication number: CN202301154U
Application number: CN2011203834492U
Authority: CN
Inventors: 蒋敏; 申屠柏卿
Original assignee: NINGBO TIANGONG MECHANICAL SEAL CO Ltd
Current assignee: NINGBO TIANGONG MECHANICAL SEAL CO Ltd
Priority date: 2011-10-10
Filing date: 2011-10-10
Publication date: 2012-07-04
Anticipated expiration: 2021-10-10

Abstract

A mechanical seal belongs to a sealing device, is arranged between a pump shaft and a pump casing and comprises a moving ring assembly and a fixed ring assembly. The fixed ring assembly comprises a fixed ring seat, a fixed ring installed on the fixed ring seat and a location ring which is used for preventing the fixed ring from moving to the left. The moving ring assembly comprises a shaft sleeve used for being connected with the pump shaft and a moving ring, a moving ring seat, a spring and a spring seat which are sequentially sleeved on the shaft sleeve from the left to the right. End faces of the moving ring and the fixed ring tightly abut against each other, the moving ring is positioned on the moving ring seat, the spring abuts between the moving ring seat and the spring seat, the location ring is connected with the shaft sleeve, and the right portion of the spring seat is in clearance fit with the right portion of the shaft sleeve. The mechanical seal can greatly improve assembling accuracy.

Description

Mechanical seal

Technical field:

The utility model relates to a kind of seal arrangement, specifically is a kind of mechanical seal that is installed between pump shaft and the pump case.

Background technique:

In the various pumps of fed sheet of a media because pump case and pump shaft are in relative rotation, therefore, between them, can have certain interval, for the medium that prevents to carry along this gap to external leakage, generally all mechanical seal can be set in the various pumps.The existing machinery sealing generally comprises moving ring assembly and static components; Moving ring assembly comprises and is used for the axle sleeve that is connected with pump shaft and is enclosed within rotating ring, rotating seat, spring, the spring seat on the axle sleeve; Rotating ring is contained on the rotating seat, and spring withstands between rotating seat and the spring seat, spring seat and axle sleeve welding.In the process of spring seat and axle sleeve welding, because the weld joint temperature is higher, spring seat and axle sleeve are prone to produce local deformation, influence assembly precision.

The model utility content:

The technical problem that the utility model will solve is that a kind of mechanical seal that can improve assembly precision greatly is provided.

The technical solution of the utility model is; A kind of mechanical seal with following structure is provided: comprise moving ring assembly and static components, static components comprises stationary seat, be contained in the stationary ring on the stationary seat and be used to the positioning ring that stops that stationary seat is moved to the left, and moving ring assembly comprises and is used for the axle sleeve that is connected with pump shaft and is enclosed within rotating ring, rotating seat, spring, the spring seat on the axle sleeve from left to right successively; Rotating ring and stationary ring end face are close to and are closed; Rotating ring is contained on the rotating seat, and spring withstands between rotating seat and the spring seat, and positioning ring is connected with axle sleeve; Wherein, the spring seat right part is connected with axle sleeve right part interference fit.

After adopting above structure; Compared with prior art; The utility model mechanical seal has the following advantages: to adopt the mode of welding that spring seat and axle sleeve are linked together different with existing technology mechanical seal, and the utility model mechanical seal adopts the mode of interference fit that spring seat is connected with axle sleeve, this Placement unlike the meeting of welding that kind in the weld joint generation high temperature; But rely on the radial deformation of spring seat and axle sleeve to be connected; Therefore, the utility model mechanical seal has been avoided making spring seat and axle sleeve produce local deformation because of the high temperature of weld joint, thereby has improved assembly precision greatly.

The described mechanical seal of the utility model wherein, can be provided with plastic washer between stationary seat and the positioning ring, and plastic washer is positioned at the mounting groove that stationary seat is provided with.

After the conventional mechanical sealing was installed between pump case and the pump shaft, the end face of positioning ring and stationary seat all was close together usually, and when positioning ring was followed the axle sleeve rotation, positioning ring and stationary seat friction took place and produce noise through regular meeting.The utility model mechanical seal is provided with plastic washer between positioning ring and stationary seat; The setting of plastic washer can separate positioning ring and stationary seat after the utility model mechanical seal is installed between pump case and the pump shaft; Avoid its end face directly to contact and rub, prevented generation of noise.Plastic washer in the utility model mechanical seal is an expendable part, treat its wearing and tearing after, will form the gap automatically between positioning ring and the stationary seat.

The described mechanical seal of the utility model wherein, can be connected with a plurality of being used for positioning ring is fixed on the positioning screwn on the axle sleeve and can be pressed on the Cock screw on the pump shaft on the positioning ring, Cock screw and positioning screwn evenly distribute along the positioning ring circumference is staggered.

During the assembling and positioning circle; The assembler can be screwed in positioning screwn and Cock screw on the positioning ring simultaneously, and the screwed in place screw can be fixed on positioning ring on the axle sleeve, and Cock screw is temporarily inoperative; When treating that the utility model mechanical seal installs on the pump shaft; Rotate Cock screw again its bottom is pressed on the pump shaft, like this, the utility model mechanical seal will firmly be connected with pump shaft; This positioning screwn that uses earlier is connected positioning ring with axle sleeve, re-use Cock screw the utility model mechanical seal and pump shaft ways of connecting can further be improved the assembly precision of the utility model mechanical seal.

The described mechanical seal of the utility model wherein, can be provided with a plurality of first boss on the rotating seat left side, the rotating ring periphery wall is provided with a plurality of first slots that match with first boss.

Description of drawings:

Fig. 1 is that the master of the utility model mechanical seal looks the sectional structure schematic representation;

Fig. 2 is the perspective view when rotating ring is connected with rotating seat in the utility model mechanical seal;

Fig. 3 is the be hit by a bullet perspective view of spring abutment of the utility model mechanical seal.

Embodiment:

Below in conjunction with accompanying drawing and embodiment to the utility model mechanical seal do further explain:

As shown in Figure 1, in this embodiment, the utility model mechanical seal comprises moving ring assembly and static components; Static components comprises stationary ring 5, be used for the stationary seat 4 that is connected with pump case and be used to the positioning ring 1 that stops that stationary seat 4 is moved to the left, is provided with plastic washer 13 between positioning ring 1 and the stationary seat 4, and plastic washer 13 is positioned at the mounting groove 3 that stationary seat 4 is provided with; Plastic washer 13 is made by PTFE, and stationary ring 5 is contained in stationary seat 4 right-hand members, is provided with O type circle between stationary ring 5 and the stationary seat 4; Moving ring assembly comprises and is used for the axle sleeve 8 that is connected with pump shaft and is enclosed within rotating ring 6, rotating seat 12, spring 9, the spring seat 10 on the axle sleeve 8 from left to right successively, and rotating ring 6 left sides and stationary ring 5 right sides are close to and are closed, and rotating ring 6 is contained in rotating seat 12 left ends; Be provided with O type circle between rotating ring 6 and the rotating seat 12; See Fig. 2, be arranged with two first boss 7 on rotating seat 12 left sides, rotating ring 6 periphery walls are provided with two first slots 15 that match with first boss 7; Be arranged with two second boss 11 on rotating seat 12 right sides; See Fig. 3, spring seat 10 left sides are provided with two second slot 16s that match with second boss 11, and are as shown in Figure 1; Spring 9 withstands between rotating seat 12 and the spring seat 10; Spring seat 10 right parts are connected with axle sleeve 8 right part interference fit, are connected with three on the positioning ring 1 and are used for positioning ring 1 is fixed on positioning screwn 14 and three Cock screws 2 that can be pressed on the pump shaft on the axle sleeve 8, and Cock screw 2 evenly distributes along positioning ring 1 circumference is staggered with positioning screwn 14.

Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technological scheme of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. mechanical seal; Comprise moving ring assembly and static components; Static components comprises stationary seat (4), be contained in the stationary ring (5) on the stationary seat (4) and be used to the positioning ring (1) that stops that stationary seat (4) is moved to the left; Moving ring assembly comprises and is used for the axle sleeve (8) that is connected with pump shaft and is enclosed within rotating ring (6), rotating seat (12), spring (9), the spring seat (10) on the axle sleeve (8) from left to right successively; Said rotating ring (6) and stationary ring (5) end face are close to and are closed, and said rotating ring (6) is contained on the rotating seat (12), and said spring (9) withstands between rotating seat (12) and the spring seat (10); Said positioning ring (1) is connected with axle sleeve (8), it is characterized in that: said spring seat (10) right part is connected with axle sleeve (8) right part interference fit.

2. mechanical seal according to claim 1 is characterized in that: be provided with plastic washer (13) between said stationary seat (4) and the positioning ring (1), said plastic washer (13) is positioned at the mounting groove (3) that stationary seat (4) is provided with.

3. mechanical seal according to claim 1 and 2; It is characterized in that: being connected with a plurality of being used on the said positioning ring (1) is fixed on positioning ring (1) positioning screwn (14) on the axle sleeve (8) and can be pressed on the Cock screw (2) on the pump shaft, and said Cock screw (2) and positioning screwn (14) evenly distribute along positioning ring (1) circumference is staggered.

4. mechanical seal according to claim 3 is characterized in that: said rotating seat (12) left side is provided with a plurality of first boss (7), and said rotating ring (6) periphery wall is provided with a plurality of first slots (15) that match with first boss (7).