Unlock instant, AI-driven research and patent intelligence for your innovation.
Non-contact oil seal mechanism for rotating shaft
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A non-contact, rotating shaft technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of reduced sealing effect, poor assembly accuracy, unpredictable sealing effect, etc., to prevent oil leakage and prevent oil flow effect
Inactive Publication Date: 2009-04-08
KOMATSU LTD
View PDF7 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
Naturally, there is also the problem that if the assembly accuracy is not good, the sealing effect will be significantly reduced.
[0011] On the other hand, as the sealing mechanism of the shaft of the rotary machine of the mechanical equipment that cannot be easily repaired after installation, as mentioned above, if the contact seal is used, the long-term sealing effect cannot be expected, but in the above-mentioned It is difficult to expect its effect in a non-contact sealing mechanism
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0063] Next, in order to verify the function of the non-contact oil seal on the low-rotation shaft, experiments were conducted using the above-mentioned examples. Also, in this example, using Figure 3A The test setup shown was carried out.
experiment example 1
[0065] In this test device 20 , a sealing mechanism is incorporated adjacent to the front bearing housing 24 among the front and rear bearings 23 , 23 ′ supporting the rotating shaft 22 of the through box 21 .
[0066] In addition, the rotary shaft 22 is driven with a desired rotation by a variable speed motor 25 . As a sealing mechanism such as Figure 3B As shown in the enlarged view of the main part P, a fine-sized gap t is provided with the rotating shaft 22, and a decompression chamber 26 (corresponding to the oil storage chamber) is formed on the front side. In addition, a transparent acrylic plate 27 is attached to the front end so that the inside can be seen.
[0067] In this configuration, as a condition for easy oil leakage, the support structure 28 is disposed on the base 29 with the axis tilted forward by 5°.
[0068] Using the test apparatus described above, the test was carried out under the following conditions.
[0081] According to the above results, it can be known that as a measure for spraying oil leakage, such as Figure 4A As shown, adopt the structure that the oil intercepting groove 32 is arranged opposite to the decompression chamber 26 on the rotating shaft 22, it is tested according to the same points as the above-mentioned experimental example 1, and Figure 3B The structures shown are compared.
[0082] Here, three oil cutting grooves 32 are formed on the outer peripheral surface of the rotating shaft 12 at positions corresponding to the decompression chambers 26 . In addition, a test was carried out by forming three oil intercepting grooves 32, each having a width dimension×depth dimension of 3 mm×3 mm, and a width dimension of the ridge between adjacent oil intercepting grooves also being 3 mm.
[0083] As a result, such as Figure 4B Shown in the chart comparing slotted and unslotted. In addition, the pressure is expressed as a relative value such that 0.002MPa=1. I...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
PUM
Login to View More
Abstract
A non-contact oil seal mechanism for a rotating shaft installed in a rotary machine which has the rotating shaft (12) and a casing in which a casing hole (3) rotatably holding the rotating shaft (12) is formed and in which the rotating shaft (12) is held in the casing hole (3) with a clearance t so as to come into non-contact with each other and lubricating oil flows through the clearance (t). The seal mechanism comprises an oil recovery chamber (4) formed in the inner peripheral surface of the casing hole (3) along the circumferential direction of the rotating shaft (12) and recovering the lubricating oil and a plurality of oil cutting grooves (5) formed in the outer peripheral surface of the rotating shaft (12) along the circumferential direction of the rotating shaft (12), arranged along the axial direction of the rotating shaft (12), and opposed to the oil recovery chamber (4). The plurality of oil cutting grooves (5) are formed to be stored within the axial width dimension W1 of the oil recovery chamber (4).
Description
technical field [0001] The present invention relates to a lubricating oil sealing mechanism for a rotating part of a rotary machine, and more particularly, to a non-contact oil sealing mechanism for a rotating shaft that prevents lubricating oil from leaking out of the rotating shaft in a non-contact state. Background technique [0002] Generally, a sealing mechanism is provided at a portion penetrating through a rotary shaft box of a rotary machine or the like to prevent intrusion of dust etc. from the outside of the box and leakage of lubricating oil from the inside of the box to the outside. Contact seals such as O-rings, oil seals, or mechanical seals are often used as the sealing mechanism. [0003] However, in the long-term operation of the contact-type sealing mechanism, the sealing member is in contact with the rotating shaft to wear or deteriorate over time (after several years of use), so that the sealing function cannot be achieved. For this reason, parts must be...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More