JPH02176195A - Cooling medium pump - Google Patents

Abstract

PURPOSE:To reduce abrasion of a crank shaft and a bearing and improve reliability of a cooling medium pump by applying a solid lubricant to a sliding surface of the crank shaft which forms a compression machine, as synthetic resin agent. CONSTITUTION:Solid lubricant 23 such as molybdenum disulfide, polytetrafluoroethylene, or the like is applied to a sliding surface 22a of a crank shaft 22 of a cooling medium pump 21, as synthetic resin agent. When the crank shaft 22 is rotated and slid, lubricating effect of the solid lubricant 23 makes the crank shaft 22 and a bearing 10 move smoothly and lowers the friction coefficient. The abrasion of the crank shaft 22 and the bearing 10 is reduced accordingly. As a result, reliability of the cooling medium pump is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerant pump widely used in the field of refrigeration and air conditioning.

2. Description of the Related Art In recent years, air conditioning equipment equipped with a refrigerant pump that circulates liquid refrigerant has been commercialized in the refrigeration and air conditioning industry.

In Figures 3 and 4, 1 is a conventional refrigerant pump;
Discharge pipe 2. A motor section 7 consisting of a rotor 6 and a stator 6 and a compressor section 8 are provided in a closed container 4 having an electrode 3. Reference numeral 9 denotes a crankshaft that is directly connected to the rotor 5 and drives the compressor machine section 8, and nothing is applied to the sliding surface 9a. 1Q is a bearing that supports the crankshaft 9 via a sliding surface 9a. 11 is a refrigerant liquid located in the closed container 4. 12 is a suction pipe.

In the above configuration, when the electric motor section 7 is energized through the electrode 3, the rotor 5 rotates, and at the same time, the crankshaft 9 rotates and slides within the bearing 1o, operating the compressor machine section 8 to perform a compression stroke. .

Problems to be Solved by the Invention However, in the above configuration, since the refrigerant liquid 11 is inside the hermetic container 4, the crankshaft 9 and the bearing 1o
Since the sliding surface 9a slides without lubrication, the crankshaft 9 and the bearing 1o, which correspond to the sliding surface 9a, are significantly worn, resulting in a problem that the reliability of the refrigerant pump is reduced.

In view of the above problems, the present invention provides a refrigerant pump that reduces wear on the crankshaft and bearings.

Means for Solving the Problems In order to solve the above-mentioned problems, the refrigerant pump of the present invention includes divalent r-hymolybdenum (
M o S 2 ), polytetrafluoroethylene (P
, T, F, E), etc., is applied as a synthetic resin agent.

Function The present invention has the above-described structure, and the sliding surface of the crankshaft is coated with a solid lubricant such as molybdenum disulfide (MoS2) or polytetrafluoroethylene (P, T, F, E). Since it is used for crankshafts, molybdenum disulfide has a layered structure that is easily sheared, so it has a lubricating effect, and polytetra 7o ethylene (
P, T, F, E) Since the surface energy (frictional resistance) of the rod is small, it has a friction reduction effect, which reduces wear on the crankshaft and bearings and improves the reliability of the refrigerant pump.

EXAMPLE Hereinafter, a refrigerant pump according to an example of the present invention will be described with reference to the drawings. Note that parts that are the same as those in the conventional example will be described using the same reference numerals, and parts that are the same in structure and operation will be omitted.

In FIG. 1, 21 is a refrigerant pump of the present invention. 2
2 has molybdenum disulfide (M o S 2 ) on the sliding surface 22a.
), polytetrafluoroethylene (P, T, F,
This is a crankshaft coated with a solid lubricant 23 such as E) as a synthetic resin agent.

In the above configuration, when the crankshaft 22 rotates and slides inside the bearing 10 via the sliding surface 22a, the solid lubricant 23 applied as a synthetic resin agent to the sliding surface 22a of the crankshaft 22 lubricates the sliding surface 22a. As a result, the crankshaft 22 and the bearing 1o become smooth and the friction coefficient becomes low, so that wear of the crankshaft 22 and the bearing 10 is reduced.

Therefore, the reliability of the refrigerant pump can be improved.

Effects of the Invention As described above, the present invention applies a solid lubricant such as molybdenum disulfide (MO82) or polytetrafluoroethylene (P, T, F, E) to the sliding surface of the crankshaft that forms the compressor machine part. By applying it as a synthetic resin agent, wear on the crankshaft and bearings is reduced, so the reliability of the refrigerant pump can be improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a refrigerant pump according to an embodiment of the present invention, FIG. 2 is a partial sectional view of FIG. 1, FIG. 3 is a sectional view of a conventional refrigerant pump, and FIG. 4 is a portion of FIG. 3. FIG. 7...Electric motor section, 8...Compressor machine section,
21...Refrigerant pump, 22...Crankshaft, 22a...Sliding surface, 23...
...Solid lubricant. Name of agent: Patent attorney Shigetaka Awano and 1 other list Figures 7-, 8-, - -... 22a--- n-- - Cao Qin Koshi Tokyo Pressure Ii Dai! Nibeko 9 Expo pump crankshaft fi11 surface solid lubricant

Claims (1)

[Claims] A refrigerant pump comprising an electric motor section and a compressor section driven by the electric motor section, and in which a solid lubricant as a synthetic resin agent is applied to the sliding surface of a crankshaft forming the compressor section.