CN201884652U

CN201884652U - Double guide plunger sealing structure

Info

Publication number: CN201884652U
Application number: CN 201020647354
Authority: CN
Inventors: 李小荣
Original assignee: Zhejiang Rongpeng Air Tools Co Ltd
Current assignee: Zhejiang Rongpeng Air Tools Co Ltd
Priority date: 2010-12-08
Filing date: 2010-12-08
Publication date: 2011-06-29
Anticipated expiration: 2020-12-08

Abstract

Disclosed is a double guide plunger sealing structure. An upper plunger seat and a lower plunger seat are arranged in the double guide plunger sealing structure, namely in a sealing structure between a plunger rod and a plunger pump, an upper guide copper sleeve and a felt are disposed in the upper plunger seat and are in slide fit with the plunger rod, and a lower guide copper sleeve is arranged in the lower plunger seat and is in slide fit with the plunger rod. The double guide plunger sealing structure is adopted, and the guide copper sleeves are disposed at both of the two ends of the sealing structure, thereby guaranteeing coaxiality of the plunger rod, greatly increasing operation precision of the plunger rod, and resolving the problem that operation coaxiality of an existing plunger rod cannot be guaranteed. The double guide plunger sealing structure has the advantages of fine sealing property, high coaxiality, low manufacturing cost and convenience in repair.

Description

A kind of pair of pilot spool sealing configuration

Technical field

The utility model relates to a kind of pair of pilot spool sealing configuration, and the two pilot spool sealing configurations that use on especially a kind of hydraulic pressure or the air piston pump belong to hydraulic pressure and pneumatic machinery product technical field.

Background technique

At present at a large amount of hydraulic pressure or air piston pumps that use, the sealing configuration of the sealing configuration that is adopted between its plunger and the plunges pump body for forming by a plurality of V-shaped ring stack combinations, the sealing configuration of this form, when hydraulic pressure or air piston pump new product, seal ring structure on it is for preventing that it is effective leaking, but after hydraulic pressure or air piston pump use a period of time, because the distortion of seal ring, make the axial linarity of plunger rod when operation in hydraulic pressure or the air piston pump change, the operation coaxality that is plunger rod changes, thereby cause hydraulic pressure or pneumatic plunger pump operation noise bigger, and cause seal ring to leak, make shorten dramatically the working life of hydraulic pressure or air piston pump, influence the normal use of hydraulic pressure or air piston pump, also make troubles to routine work.

Summary of the invention

The utility model provides a kind of a kind of pair of pilot spool sealing configuration of novelty, adopts two pilot spool sealing configuration technology, to realize guaranteeing and improving the operation coaxality of plunger rod and purpose easy to installation and maintenance.

The technical solution adopted in the utility model is:

A kind of pair of pilot spool sealing configuration, in described pair of pilot spool sealing configuration, promptly be provided with upper prop obturating plug, lower prop obturating plug in the sealing configuration between plunger rod and plunges pump body, in the upper prop obturating plug, be provided with the copper sheathing that leads, malthoid, last guiding copper sheathing, malthoid and plunger rod are slidingly matched, be provided with guiding copper sheathing down in the lower prop obturating plug, following guiding copper sheathing and plunger rod are slidingly matched.

Also be provided with back-up ring A, back-up ring B in described lower prop obturating plug, back-up ring A is provided with seal ring A, and back-up ring B is provided with seal ring B.

The utility model beneficial effect is:

Owing to adopted a kind of pair of pilot spool sealing configuration of the present utility model, guiding copper sheathing structure all is set at the two ends of sealing mechanism, guaranteed the coaxality of plunger rod, make the running precision of plunger rod greatly improve, solved the problem that existing plunger rod operation coaxality can't guarantee, a kind of pair of pilot spool sealing configuration of the present utility model has: good seal performance, coaxality height, low cost of manufacture, characteristics easy to maintenance.

Description of drawings

Fig. 1: the sectional view that is a kind of pair of pilot spool sealing configuration of the utility model;

Fig. 2: the partial structurtes enlarged view that is Fig. 1.

Among Fig. 1,2: plunger rod 1, upper prop obturating plug 2, lower prop obturating plug 3, on the copper sheathing 4 that leads, malthoid 5, following guiding copper sheathing 6, back-up ring A7, back-up ring B8, seal ring A9, seal ring B10, plunges pump body 11.

Embodiment

As shown in Figure 1 and Figure 2.

A kind of pair of pilot spool sealing configuration comprises: plunger rod 1, upper prop obturating plug 2, lower prop obturating plug 3, on lead copper sheathing 4, malthoid 5, lead copper sheathing 6, back-up ring A7, back-up ring B8, seal ring A9, seal ring B10, plunges pump body 11 structures down.

A kind of pair of pilot spool sealing configuration, in described pair of pilot spool sealing configuration, promptly be provided with upper prop obturating plug 2, lower prop obturating plug 3 in the sealing configuration between plunger rod 1 and plunges pump body 11, in upper prop obturating plug 2, be provided with guiding copper sheathing 4, malthoid 5, last guiding copper sheathing 4, malthoid 5 are slidingly matched with plunger rod 1, be provided with guiding copper sheathing 6 down in lower prop obturating plug 3, following guiding copper sheathing 6 is slidingly matched with plunger rod 1.

Also be provided with back-up ring A7, back-up ring B8 in described lower prop obturating plug 3, back-up ring A7 is provided with seal ring A9, and back-up ring B8 is provided with seal ring B10.

Basic functional principle:

Press Fig. 1 or shown in Figure 2, with upper prop obturating plug 2, lower prop obturating plug 3, on lead copper sheathing 4, malthoid 5, the copper sheathing 6 that leads is installed in the sealing configuration chamber of plunges pump body 11 down, install plunger rod 1 then, between plunger rod 1 and plunges pump body 11, form a sealing mechanism like this, owing to adopted a guiding copper sheathing respectively be installed in upper prop obturating plug 2 and lower prop obturating plug 3, so sealing mechanism has formed two guiding copper sheathings up and down, so be referred to as two pilot spool sealing configurations.

Can also in lower prop obturating plug 3, set up and put two road back-up rings, i.e. back-up ring A7, back-up ring B8, and a seal ring is installed respectively on back-up ring A7, back-up ring B8, i.e. seal ring A9, seal ring B10, seal ring A9, seal ring B10 are the O-ring seals structure.

Motor drives plunger rod 1 to-and-fro motion by the gear connecting rod driving mechanism, respectively puts an one-way valve realization suction and discharge in charging and discharge port.

When suction, the material sucking port closed check valve, the discharge gate one-way valve opens, thus realize discharge, because of dividing, outsides such as discharge gate and spray gun storage splenium is connected, so during discharge, back-up ring A7, back-up ring B8 bear higher pressure, pressure is high more, O-ring seals on back-up ring A7, the back-up ring B8, be that seal ring A9, seal ring B10 are big more with regard to distortion, seal ring A9, seal ring B10 tightly encase back-up ring A7, back-up ring B8 respectively like this, realize excellent sealing thereby make back-up ring A7, back-up ring B8 pack tightly plunger rod 1 more.

Respectively put a guiding copper sheathing at the sealing configuration two ends of plunger rod 1, effectively guarantee coaxality, it is extremely convenient to keep in repair, and need not any frock, and manufacture cost is lower.

Claims

1. two pilot spool sealing configuration, it is characterized in that: in described pair of pilot spool sealing configuration, promptly be provided with upper prop obturating plug (2), lower prop obturating plug (3) in the sealing configuration between plunger rod (1) and plunges pump body (11), in upper prop obturating plug (2), be provided with guiding copper sheathing (4), malthoid (5), last guiding copper sheathing (4), malthoid (5) are slidingly matched with plunger rod (1), be provided with guiding copper sheathing (6) down in lower prop obturating plug (3), following guiding copper sheathing (6) is slidingly matched with plunger rod (1).

2. a kind of pair of pilot spool sealing configuration according to claim 1, it is characterized in that: in described lower prop obturating plug (3), also be provided with back-up ring A(7), back-up ring B(8), back-up ring A(7) be provided with seal ring A(9), back-up ring B(8) be provided with seal ring B(10).