supermarket refrigerated showcase » article > display refrigerator > How many forms of damage to supermarket refrigerated showcase parts?
How many forms of damage to supermarket refrigerated showcase parts?
(1) The concept of wear
To make the surfaces of two objects move relative to each other, a certain force is needed to realize it. This is due to the existence of friction on the contact surface between opposite objects, and the resistance produced by friction is called friction. Friction is to hinder relative movement between rubbing objects, or even prevent relative movement from occurring. Therefore, wear will occur when the relative movement overcomes the frictional force.
(2) About supermarket refrigerated showcase Part damage form
There are various reasons for machine parts wear or damage, and it is difficult to study each damage encountered. Therefore, we divide the forms of wear or damage often encountered in the machine structure into three situations to describe.
1. Mechanical wear
parts are subject to the long-term effect of friction under normal conditions of use, and gradually increase the wear, which exceeds the ultimate strength of the parts and is damaged. This is determined by the structure of the parts. Therefore, the use of parts has a certain period of time, such as valve discs. It is normal to wear during the specified period.
mechanical wear is divided into different forms such as uniform wear, uneven wear, scratches and dents. In piston refrigeration compressor parts, uneven wear is more common due to alternating loads and shock loads. For example, the worn shape of crank pins, cylinders, pistons, etc. is elliptical, which produces scratches on the surface of the parts, which are usually caused by unclean system, unclean lubricating oil, and burrs on the parts.
2. Hot — — chemical damage
When the parts are in contact with the surrounding medium, they will be deformed, pitted and corroded due to heat and chemical action, causing changes in the material of the parts, such as high temperature deforming the safety spring, and cold brittleness causing the valve to break , Oil immersion makes the shaft seal rubber ring hard and aging.
3. Accident damage
(1) Accident damage caused by improper operation, such as the oil pressure can not cause the bearing shell to melt within a few minutes; the wet stroke of the machine causes the valve plate and valve spring to be cold and brittle and damage, which causes the cylinder and piston to become rough, Damage etc.
(2) There is no regular maintenance or accident damage caused by improper maintenance on supermarket refrigerated showcase. The strength and fatigue resistance of the parts,There is a certain limit to the degree of wear and tear, and if it is repaired irregularly, the strength and wear of the small parts will inevitably be damaged if they exceed the limit. The damage of small parts will cause damage to other large parts. This will increase the maintenance cost and difficulty, and the quality cannot be guaranteed. Improper inspection of minnows caused accidental damage to machine parts. For example, the gap between the shaft and the bearing bush is too small, the lubrication is not good during operation, and the temperature rises until dry friction is caused, which causes the bearing bush to melt, and the shaft diameter is severely worn and scrapped.
refrigerated showcase refrigeration equipment is a professional company integrating design, manufacturing, sales and service. The products are: all kinds of fresh-keeping cabinets, display cabinets, display cases, air curtain cabinets, deli cabinets, fresh meat cabinets, cold storage, etc. Free hotline: +86 18019567573
This article is organized by refrigerated showcase supermarket refrigerated showcase
, more information welcome Company website: www.ihdjx.com
keywords:
Ranking of similar articles
- Dragon fruit reveals ark makes pitaya ornamental fruit
- May 2011 refrigerated showcase Qingyuan Tour
- walk-in cooler disassembly and maintenance method
- Represent the frozen watermelon fruit for storage
- 2012 take care of the old man from the supermarket refrigerated showcase
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- 2013 refrigerated showcase ltd. refrigeration lunar New Year holiday notice
- The structure and working principle of computer-based supermarket refrigerated showcase
- Commercial refrigeration evaporator embedment and production (6)
- Air-conditioner noise?
- The rapid growth of the supermarket walk-in cooler market in refrigeration equipment
- walk-in cooler refrigeration failure and maintenance method (5)
- The air-conditioner doesn't automatically melt frost failure analysis
- display cases Refrigeration failures and maintenance methods (9)
- The general principle of design and layout of display cooler refrigeration system
- Walk-in cooler secondary failure unit refrigeration difference analysis (2)
Latest news articles
- May 2011 refrigerated showcase Qingyuan Tour
- refrigerated showcase Refrigeration Equipment Co., Ltd. growth process
- Refrigerated showcase major sales walk - cooler in class
- Refrigerated showcase display cooler written commercial display cooler legend
- Refrigerated showcase walk - in cooler energy-saving progresses steadily
- 2012 take care of the old man from the supermarket refrigerated showcase
- refrigerated showcase Tip: Which fruits are not suitable for placing in the fruit refrigerated showcase
- Dragon fruit reveals ark makes pitaya ornamental fruit
- Watermelon fresh-keeping refrigerator can better preserve the nutrients of watermelon
- Represent the frozen watermelon fruit for storage
- Hairy crabs freezer frozen taste more fresh
- How hairy crabs fresh refrigerated showcase display cooler tell you
- Large supermarket display ark how to choose the right goods
- Small convenience store owner should show how to choose the convenience stores ltd. refrigeration
- Refrigerated showcase ltd. refrigeration has been a leader in innovation and energy saving
- In September 2012, refrigerated showcase west chung
- Refrigerated showcase walk - in cooler cleaner which aspects should be paid attention to
- Correctly use refrigerated showcase supermarket refrigerated showcase the matters needing attention
- , a refrigerated display showcase meat cooler features of the product
- Refrigerated showcase walk - in the cooler is icy